CN114967971A - Display device, control method thereof and display system - Google Patents

Abstract

The application provides a display device, a control method thereof and a display system, relates to the technical field of display, and is used for solving the problem of how to improve the convenience of handwriting operation of a handwriting pen. Specifically, the display device comprises a display screen, a first light emitter, a first light receiver, a second light emitter, a second light receiver, a detection unit and a controller. The display screen comprises a display surface, and the display surface comprises a first edge area and a second edge area which are opposite. The first light emitter is arranged on the side towards which the first edge area faces, and the first light receiver is arranged on the side towards which the second edge area faces. One of the second optical transmitter and the second optical receiver is arranged on the side of the first optical transmitter opposite to the first edge area, and the other of the second optical transmitter and the second optical receiver is arranged on the side of the first optical receiver opposite to the second edge area. The display equipment is used for inputting characters or graphs by handwriting.

Description

A display device, its control method, and a display system

technical field

The present application relates to the field of display technology, and in particular, to a display device, a control method thereof, and a display system.

Background technique

At present, display devices such as conference screens and tablet computers are usually equipped with a stylus, so as to facilitate the user to write text and graphics on the handwriting interface displayed by the display device. In the process of writing text or graphics, in order to switch between the writing function and other functions (such as the eraser function or the clear function), a virtual button is usually set in the handwriting interface, and the user needs to click the virtual button to realize the function switching. , which is less convenient to operate.

In order to solve the above problems, the stylus can be set as an electronic pen. The electronic pen and the conference screen are connected through Bluetooth. There are function buttons (such as writing buttons and eraser buttons) on the electronic pen. Implement switching between different functions. However, the cost of the electronic pen is relatively high, and it needs a battery or charging, so the replaceability is not high.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a display device, a control method thereof, and a display system, which are used to solve the problem of how to improve the convenience of handwriting operations with a stylus pen.

To achieve the above object, the embodiments of the present application adopt the following technical solutions:

In a first aspect, a display device is provided, the display device includes a display screen, a first light transmitter, a first light receiver, a second light transmitter, a second light receiver, a detection unit, and a controller.

The display screen includes a display surface, and the display surface includes opposite first edge regions and second edge regions.

The first light emitter is arranged on the side facing the first edge region, the first light receiver is arranged on the side facing the second edge region, the first light emitter has a first light outlet, and the first light receiver It has a first light receiving port, and the first light output port is opposite to the first light receiving port.

The second light emitter is arranged on the side of the first light emitter facing away from the first edge region, and the second light receiver is arranged on the side of the first light receiver facing away from the second edge region. In some other embodiments, the second light receiver is disposed on a side of the first light emitter facing away from the first edge region, and the second light emitter is disposed on a side of the first light receiver facing away from the second edge region . The second light transmitter has a second light outlet, the second light receiver has a second light receiver, and the second light outlet is opposite to the second light receiver.

The detection unit is used for detecting the first light intensity received by the first light receiving port of the first light receiver and the second light intensity received by the second light receiving port of the second light receiver.

The controller is configured to output a control signal according to the first light intensity and the second light intensity detected by the detection unit.

In the display device provided by the embodiment of the present application, two layers of light emitting and receiving components are disposed on two opposite edge regions (respectively, the first edge region and the second edge region) of the display surface, and the two layers of light emitting and receiving components are located on the lower layer respectively. The first optical transmitter and the first optical receiver, and the second optical transmitter and the second optical receiver located on the upper layer. On the premise that the light intensities emitted by the first optical transmitter and the second optical transmitter are approximately equal, the detection unit can detect the light intensities received by the first optical receiver and the second optical receiver, so as to realize two obstacles up and down. The width of the part in the first direction is detected. The first direction is a direction parallel to the display screen and perpendicular to the light-emitting directions of the first light emitter and the second light emitter. Obstacles with different shapes in the dimension perpendicular to the display screen can thus be identified. On this basis, the controller can output a control signal according to the first light intensity and the second light intensity detected by the detection unit. In this way, when the obstacle is a stylus, the head and tail of the stylus can be designed as follows: the change law of the cross-sectional width of the head from the end connecting the pen body to the end far from the pen body and the pen tail from the end connecting the pen body to the end of the pen body. The cross-section width of the end away from the pen body changes in different rules, so that when the head and tail of the stylus touch the display screen respectively, different control signals are output, so that the function switching of the stylus can be realized without clicking the virtual screen on the display device. The button is convenient to operate, and there is no need to set a switch button on the stylus, so the cost is low.

In a possible implementation manner of the first aspect, the display surface includes a first side and a second side opposite to each other, the first edge area and the second edge area are located between the first side and the second side, and the first edge The region adjoins the first edge and the second edge region adjoins the second edge. The number of the first optical transmitters and the first optical receivers is multiple, the multiple first optical transmitters are arranged along the first side, the multiple first optical receivers are arranged along the second side, and the multiple first optical transmitters are arranged along the second side. The first light output ports of the receiver are respectively opposite to the first light receiving ports of the plurality of first light receivers. The number of the second optical transmitter and the second optical receiver may also be plural. A plurality of second light transmitters are arranged along the first side, and a plurality of second light receivers are arranged along the second side. The second light-emitting ports of the plurality of second light transmitters are respectively opposite to the second light-receiving ports of the plurality of second light receivers. When the second light receiver is disposed on the side of the first light emitter facing away from the first edge region, and the second light emitter is disposed on the side of the first light receiver facing away from the second edge region, the plurality of second light receivers The light transmitters are arranged along the second side, and the plurality of second light receivers are arranged along the first side. In this way, when the stylus is moved to multiple positions in the area between the first edge area and the second edge area on the display surface, function switching can be realized, which is more convenient.

In a possible implementation manner of the first aspect, the display surface includes a display area and a first non-display area and a second non-display area provided around an edge of the display area. The edge of the display area includes an opposite third side and a fourth side, the third side and the fourth side are located between the first side and the second side, and the third side is located between the first side and the fourth side. The first non-display area is located between the first side and the third side, the first side and the third side form opposite edges of the first non-display area, and the first non-display area forms a first edge area. The second non-display area is located between the second side and the fourth side, and the second side and the fourth side form opposite edges of the second non-display area, and the second non-display area forms a second edge area. In this way, the first edge area and the second edge area are respectively the non-display areas at opposite ends of the display surface, the first light emitter and the second light emitter are disposed on the side facing the first edge area, and the The first light receiver and the second light receiver on the side facing the second edge area will not interfere with the normal display of the display screen.

In a possible implementation manner of the first aspect, the display surface further includes an opposite third edge area and a fourth edge area, and the third edge area and the fourth edge area are located between the first edge area and the second edge area . The display device also includes a third light transmitter and a third light receiver. The third light emitter is arranged on the side facing the third edge region, the third light receiver is arranged on the side facing the fourth edge region, the third light emitter has a third light outlet, and the third light receiver A third light-receiving port is provided, and the third light-emitting port is opposite to the third light-receiving port. When the stylus moves on the partial area of the display surface surrounded by the first edge region, the second edge region, the third edge region and the fourth edge region, the third light emitter, the third light receiver and the third A light transmitter and a first light receiver cooperate, or the third light transmitter and the third light receiver cooperate with the second light transmitter and the second light receiver to realize the position detection of the stylus in the plane. Thereby, the movement trajectory detection of the stylus is realized. The structure used in this detection method is independent of the display screen, so the assembly and maintenance costs are low, and it is widely used.

In a possible implementation manner of the first aspect, the display surface further includes an opposite fifth side and a sixth side, the third edge area and the fourth edge area are located between the fifth side and the sixth side, and the third edge area is located between the fifth side and the sixth side. The edge region adjoins the fifth edge, and the fourth edge region adjoins the sixth edge. The number of the third optical transmitters and the third optical receivers is multiple, the multiple third optical transmitters are arranged along the fifth side, the multiple third optical receivers are arranged along the sixth side, and the multiple third optical transmitters are arranged along the sixth side. The third light-emitting ports of the light transmitter are respectively opposite to the third light-receiving ports of the plurality of third light receivers. In this way, when the stylus moves over a larger area of the display surface surrounded by the first edge area, the second edge area, the third edge area and the fourth edge area, the third light emitter, the third The optical receiver cooperates with the first optical transmitter and the first optical receiver, or cooperates with the second optical transmitter and the second optical receiver by means of the third optical transmitter and the third optical receiver, so that the stylus can be placed on the plane. Internal position detection, the handwriting interface is larger, and the handwriting performance is better.

In a possible implementation manner of the first aspect, the display device further includes a fourth light transmitter and a fourth light receiver. The fourth light emitter is arranged on the side of the third light emitter facing away from the third edge region, and the fourth light receiver is arranged on the side of the third light receiver facing away from the fourth edge region. In some other embodiments, the fourth light receiver is disposed on the side of the third light emitter facing away from the third edge region, and the fourth light emitter is disposed on the side of the third light receiver facing away from the fourth edge region . The fourth light transmitter has a fourth light outlet, the fourth light receiver has a fourth light receiver, and the fourth light outlet is opposite to the fourth light receiver. The detection unit is further configured to detect the third light intensity received by the third light receiving port of the third light receiver and the fourth light intensity received by the fourth light receiving port of the fourth light receiver. The controller is further configured to output a control signal according to the third light intensity and the fourth light intensity detected by the detection unit. In this way, when the obstacle touches the display screen of the display device, and the shape of the obstacle is different in the dimension perpendicular to the display screen, the first light transmitter, the first light receiver, the second light transmitter and the The upper and lower two-layer light-emitting and receiving components composed of two light-receivers are used to detect the width of the upper and lower parts of the obstacle in the first direction, and also use the third light-emitting device, the third light-emitting The upper and lower two-layer light emitting and receiving components composed of the device and the fourth light receiver realize the width detection of the upper and lower parts of the obstacle in the second direction. The second direction is a direction parallel to the display screen and perpendicular to the light-emitting directions of the third light emitter and the fourth light emitter. Thereby, the cross-sectional shapes of the upper and lower parts can be recognized, thereby realizing the recognition of the three-dimensional shape of the obstacle, so as to improve the recognition accuracy of the obstacle and the control accuracy of the display device. For example, when the obstacle is a stylus, not only can the width of the upper and lower parts in the first direction be detected to determine whether it is a cone-shaped pen head or a column-shaped pen tail, but also the upper and lower parts can be further detected in the second direction. To determine the cross-sectional shape of the pen head or pen tail, to determine whether the pen head is conical, square cone, triangular pyramid or polygonal pyramid shape, and the pen tail is cylindrical, square column, triangular prism or Polygonal. As a result, detection accuracy and control accuracy can be improved.

In a possible implementation manner of the first aspect, the number of the fourth optical transmitter and the fourth optical receiver is multiple. The plurality of fourth light transmitters are arranged along the fifth side, and the plurality of fourth light receivers are arranged along the sixth side. The fourth light-emitting ports of the plurality of fourth light transmitters are respectively opposite to the fourth light-receiving ports of the plurality of fourth light receivers. When the fourth light receiver is arranged on the side of the third light emitter facing away from the third edge region, and the fourth light emitter is arranged on the side of the third light receiver facing away from the fourth edge region, a plurality of fourth light receivers The light transmitters are arranged along the sixth side, and the plurality of fourth light receivers are arranged along the fifth side. In this way, when the stylus moves to multiple positions in the area surrounded by the first edge area, the second edge area, the third edge area and the fourth edge area on the display surface, detection can be achieved, and the convenience is better. .

In a possible implementation manner of the first aspect, the display device can not only detect the three-dimensional shape of obstacles to implement different functions, but also recognize gestures that move in three-dimensional space, such as recognizing page turning gestures , the movement track line of the page turning gesture is an arc line located on the side facing the display surface and arched toward the display surface.

In a possible implementation manner of the first aspect, the first optical transmitter, the first optical receiver, the third optical transmitter and the third optical receiver are approximately arranged in the same plane, and the first optical transmitter, The plane on which the first light receiver, the third light transmitter and the third light receiver are arranged is substantially parallel to the display surface. The second optical transmitter, the second optical receiver, the fourth optical transmitter and the fourth optical receiver are approximately arranged in the same plane, and the second optical transmitter, the second optical receiver, the fourth optical transmitter and the The plane on which the four light receivers are arranged is substantially parallel to the display surface. In this way, the first light transmitter, the first light receiver, the third light transmitter and the third light receiver realize the cross-sectional shape detection of a part of the obstacle, and the second light transmitter, the second light receiver The device, the fourth light transmitter and the fourth light receiver realize cross-sectional shape detection of another part of the obstacle.

In a possible implementation manner of the first aspect, the display surface includes a display area and a third non-display area and a fourth non-display area provided around an edge of the display area. The edges of the display area include opposing seventh and eighth sides. The seventh side and the eighth side are located between the fifth side and the sixth side, and the seventh side is located between the fifth side and the eighth side. The third non-display area is located between the fifth side and the seventh side, and the fifth side and the seventh side form opposite edges of the third non-display area, and the third non-display area forms a third edge area. The fourth non-display area is located between the sixth side and the eighth side, and the sixth side and the eighth side form opposite edges of the fourth non-display area, and the fourth non-display area forms a fourth edge area. In this way, the third edge area and the fourth edge area are respectively the non-display areas at opposite ends of the display surface, the third light emitter and the fourth light emitter are arranged on the side facing the third edge area, and the The third light receiver and the fourth light receiver on the side facing the fourth edge region will not interfere with the display of the display screen.

In a possible implementation manner of the first aspect, both the first light emitter and the second light emitter are infrared light emitters;

Both the first light receiver and the second light receiver are infrared light receivers.

In a possible implementation manner of the first aspect, the display device includes a face frame, and the face frame includes a first shielding part and a second shielding part. The first shielding portion is located on the side facing the first edge region, and the second shielding portion is located on the side facing the second edge region. The first light emitter and the second light emitter are disposed between the first shielding portion and the first edge region. The first light receiver and the second light receiver are disposed between the second shielding portion and the second edge region. When the second light emitter is disposed on the side of the first light receiver facing away from the second edge region, and the second light receiver is disposed on the side of the first light emitter facing away from the first edge region, the first light emitter The light receiver and the second light receiver are arranged between the first shielding part and the first edge region, and the first light receiver and the second light emitter are arranged between the second shielding part and the second edge region. In this way, shielding, decoration and protection of the first light transmitter, the first light receiver, the second light transmitter and the second light receiver can be achieved by means of the face frame.

In a second aspect, a display system is further provided, and the display system includes a stylus and the display device described in any of the above technical solutions. The stylus includes a head, a body and a tail that are connected in sequence. The width of the cross-section of the head from one end connected to the body to the end away from the body is the same as the width of the cross-section of the tail from the end connected to the body to the end away from the body. The laws of change are different.

In this way, when the head and tail of the stylus touch the display screen respectively, the detection unit in the display device detects the light intensity received by the first light receiver and the second light receiver, so as to realize the upper and lower parts of the head or tail. The width of the part in the first direction is detected, and according to the detection result, it is determined that the tip or tail of the pen touches the display screen, thereby outputting different control signals to realize the function switching of the stylus, without clicking the virtual button on the display device, The operation convenience is high, and there is no need to set switch buttons on the stylus, so the cost is low.

In a possible implementation manner of the second aspect, the cross-sectional width of the pen head gradually decreases from an end connected to the pen body to an end away from the pen body. The width of the section of the pen tail from the end connecting the pen body to the end away from the pen body is constant.

In a possible implementation manner of the second aspect, the pen head is conical, and the pen tail is cylindrical.

In a third aspect, a control method of a display device is also provided, wherein the display device includes a display screen, a first light transmitter, a first light receiver, a second light transmitter and a second light receiver. The display screen includes a display surface, and the display surface includes opposite first edge regions and second edge regions. The first light emitter is arranged on the side facing the first edge region, the first light receiver is arranged on the side facing the second edge region, the first light emitter has a first light outlet, and the first light receiver It has a first light receiving port, and the first light output port is opposite to the first light receiving port. One of the second light transmitter and the second light receiver is disposed on the side of the first light transmitter facing away from the first edge region, and the other one of the second light transmitter and the second light receiver is disposed on the first light transmitter The side of the light receiver facing away from the second edge region, the second light emitter has a second light outlet, the second light receiver has a second light receiver, and the second light receiver is opposite to the second light outlet. On this basis, the control method includes: detecting the first light intensity received by the first light receiving port of the first light receiver and the second light intensity received by the second light receiving port of the second light receiver; intensity and the second light intensity, and output a control signal.

In this way, obstacles of different shapes can be identified in the dimension perpendicular to the display. And for obstacles with different shapes, output different control signals to control to achieve different functions. When the obstacle is a stylus, the head and tail of the stylus can be designed as follows: the change rule of the cross-sectional width of the head from the end connected to the pen body to the end away from the pen body and the pen tail from the end connected to the pen body to the end away from the pen The width of one end of the stylus has different changing rules, so that when the head and tail of the stylus touch the display screen, different control signals are output, so that the function switching of the stylus can be realized without clicking the virtual button on the display device. The operation convenience is high, and there is no need to set switch buttons on the stylus, so the cost is low.

In a possible implementation manner of the third aspect, outputting a control signal according to the first light intensity and the second light intensity includes: when the first light intensity is greater than the second light intensity, and the first light intensity is the same as the second light intensity When the difference in intensity is greater than or equal to the first preset threshold, a first control signal is output, and the first control signal is used to control the activation of the first function of the display device; when the absolute value of the difference between the first light intensity and the second light intensity is less than Or when it is equal to the second preset threshold, output a second control signal, the second control signal is used to control the activation of the second function of the display device, the second function is different from the first function, and the second preset threshold is smaller than the first preset threshold.

In this way, the head and tail of the stylus can be set to be cone-shaped and column-shaped, respectively, and the range of the first preset threshold and the second preset threshold can be reasonably set to prevent the palm, the back of the hand or other obstacles from touching the display screen. Therefore, when the head and tail of the stylus touch the display device, the first function and the second function can be controlled to be activated respectively.

In a possible implementation manner of the third aspect, the first function is a writing function.

In a possible implementation manner of the third aspect, the second function is an eraser function, a clearing function, a color switching function or a saving function.

In a possible implementation manner of the third aspect, the display surface further includes a third edge region and a fourth edge region opposite to each other, and the third edge region and the fourth edge region are located between the first edge region and the second edge region ; The display device also includes a third light transmitter, a third light receiver, a fourth light transmitter and a fourth light receiver; the third light transmitter is arranged on the side facing the third edge region, and the third light receiver The third light emitter is provided with a third light outlet, the third light receiver is provided with a third light receiving port, and the third light outlet is opposite to the third light receiving port. One of the fourth light emitter and the fourth light receiver is arranged on the side of the third light emitter facing away from the third edge region, and the other one of the fourth light emitter and the fourth light receiver is arranged on the side of the third light emitter facing away from the third edge region. The side of the third optical receiver facing away from the fourth edge region, the fourth optical transmitter has a fourth light outlet, the fourth optical receiver has a fourth light receiving port, and the fourth light receiving port is opposite to the fourth light outlet.

Based on the above, the control method further includes: detecting the third light intensity received by the third light receiving port of the third optical receiver and the fourth light intensity received by the fourth light receiving port of the fourth optical receiver. On this basis, outputting the control signal according to the first light intensity and the second light intensity includes: outputting the control signal according to the first light intensity, the second light intensity, the third light intensity and the fourth light intensity. In this way, when the obstacle touches the display screen of the display device, and the shape of the obstacle is different in the dimension perpendicular to the display screen, the first light transmitter, the first light receiver, the second light transmitter and the The upper and lower two-layer light-emitting and receiving components composed of two light-receivers are used to detect the width of the upper and lower parts of the obstacle in the first direction, and also use the third light-emitting device, the third light-emitting The upper and lower two-layer light emitting and receiving components composed of the device and the fourth light receiver realize the width detection of the upper and lower parts of the obstacle in the second direction. Thereby, the cross-sectional shapes of the upper and lower parts can be recognized, thereby realizing the recognition of the three-dimensional shape of the obstacle, so as to improve the recognition accuracy of the obstacle and the control accuracy of the display device. For example, when the obstacle is a stylus, not only can the width of the upper and lower parts in the first direction be detected to determine whether it is a cone-shaped pen head or a column-shaped pen tail, but also the upper and lower parts can be further detected in the second direction. To determine the cross-sectional shape of the pen head or pen tail, to determine whether the pen head is conical, square cone, triangular pyramid or polygonal pyramid shape, and the pen tail is cylindrical, square column, triangular prism or Polygonal. As a result, detection accuracy and control accuracy can be improved.

In a possible implementation manner of the third aspect, outputting a control signal according to the first light intensity, the second light intensity, the third light intensity, and the fourth light intensity includes: when the first light intensity is greater than the second light intensity , when the third light intensity is greater than the fourth light intensity, and the difference between the first light intensity and the second light intensity and the difference between the third light intensity and the fourth light intensity are both greater than or equal to the first preset threshold, output the first control signal, the first control signal is used to control the activation of the first function of the display device; when the absolute value of the difference between the first light intensity and the second light intensity and the absolute value of the difference between the third light intensity and the fourth light intensity are less than or When it is equal to the second preset threshold, a second control signal is output, and the second control signal is used to control the activation of the second function of the display device, the second function is different from the first function, and the second preset threshold is smaller than the first preset threshold . In this way, the head and tail of the stylus can be set to be conical and cylindrical, respectively, and the ranges of the first preset threshold and the second preset threshold can be reasonably set to exclude the palm, the back of the hand or other obstacles from contacting the display. In this way, when the head and tail of the stylus touch the display device, the first function and the second function can be controlled to be activated respectively.

Description of drawings

FIG. 1 is a schematic structural diagram of a display system provided by some embodiments of the present application;

2 is a schematic diagram of a handwriting interface displayed by a display device in the display system shown in FIG. 1;

Fig. 3 is a schematic diagram when the handwriting interface shown in Fig. 2 is switched from the writing function state to the eraser function state;

Fig. 4 is the schematic diagram when the handwriting interface shown in Fig. 2 is in the eraser function state;

FIG. 5 is a front view of a display device provided by some embodiments of the present application;

6 is a schematic cross-sectional structure diagram of the display device shown in FIG. 5 at line B-B;

7 is a schematic structural diagram of a stylus provided by some embodiments of the present application;

8 is a schematic structural diagram when the tip of the stylus is in contact with the display device shown in FIG. 6;

9 is a schematic structural diagram when the tail of the stylus is in contact with the display device shown in FIG. 6;

10 is a perspective view of an assembly structure of a display screen and a first light transmitter, a first light receiver, a second light transmitter and a second light receiver in the display device shown in FIG. 6;

11 is a front view of a display screen of the display device shown in FIG. 6;

12 is a perspective view of a display device provided by further embodiments of the present application;

13 is a front view of a display device including the first light transmitter, the first light receiver, the second light transmitter, the second light receiver, the third light transmitter and the third light receiver shown in FIG. 12;

FIG. 14 is a perspective view of a display device provided by further embodiments of the present application;

FIG. 15 is a schematic diagram of a usage scenario of a display device provided by further embodiments of the present application;

FIG. 16 provides a flowchart of a control method for a display device according to some embodiments of the present application;

FIG. 17 is a flowchart of a control method of a display device provided by further embodiments of the present application.

Detailed ways

In the embodiments of the present application, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for For descriptive purposes, it should not be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh", and "eighth" can be expressed or implied. One or more of these features are inclusively included.

In the embodiments of the present application, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, but also Include other elements not expressly listed, or which are inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

In the embodiments of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" may be detachable connection or non-removable connection. Removably connected; either directly or indirectly through an intermediary.

In the embodiments of the present application, it should be noted that the description of "parallel" means substantially parallel within a certain error range, and the error range may be a range where the deviation angle is less than or equal to 5°, 8° or 10°.

The present application provides a display system. Please refer to FIG. 1 , which is a schematic structural diagram of a display system 100 according to some embodiments of the present application. The display system 100 includes a display device 10 and a stylus 20 . The display device 10 is a type of electronic device having a display function. Specifically, the display device 10 includes, but is not limited to, a conference screen, a television, a computer monitor, a tablet computer, a notebook computer, a personal digital assistant (PDA), and a vehicle-mounted device. This embodiment and the following embodiments are exemplified by using the display device 10 as a conference screen. The stylus 20 is used to write text or graphics on the handwriting interface displayed by the display device 10 .

Please refer to FIG. 2 , which is a schematic diagram of a handwriting interface A displayed by the display device 10 in the display system shown in FIG. 1 . The handwriting interface A fills the display interface of the display device 10 . In some other embodiments, the handwriting interface A may also occupy part of the display interface of the display device 10 . The handwriting interface A includes a whiteboard area A1 and a virtual key area A2.

The virtual key area A2 is arranged in the whiteboard area A1. In some embodiments, please refer to FIG. 2 , the virtual key area A2 is disposed in the lower end area of the whiteboard area A1 . In some other embodiments, the virtual key area A2 may also be arranged in the left end area, the right end area, the upper end area or the middle area of the whiteboard area A1. In some embodiments, the virtual key area A2 can be set as a movable area that can be dragged by the user to any position in the whiteboard area A1.

The virtual key area A2 is provided with a plurality of virtual keys. The multiple virtual keys can realize switching between multiple functions. For example, please refer to FIG. 2 , the virtual keys may include a pen key, an eraser key, a clear key, a color selection key and a save key. Among them, the pen button is used to control the whiteboard area A1 to display the movement track of the stylus 20 thereon, so as to realize the writing function. The eraser button is used to control the whiteboard area A1 to erase the text or graphics on the movement track of the stylus, so as to realize the eraser function. The clear button is used to control the whiteboard area A1 to clear all the characters and graphics written on it, so as to realize the clear function. The color selection button is used to switch the display color of the writing graphics. The save button is used to save the written graphics.

The handwriting interface A shown in FIG. 2 is in a writing function state. In this state, the whiteboard area A1 displays the movement track of the stylus 20 thereon, so as to realize the writing function. When the user is writing text or graphics, in order to switch between the writing function and other functions (such as the eraser function or the clear function), the user needs to click the virtual key in the virtual key area A2 to realize the function switch.

For example, please refer to FIG. 3 , which is a schematic diagram of the handwriting interface A shown in FIG. 2 when switching from a writing function state to an eraser function state. The user clicks the eraser button of the virtual key area A2 by means of the stylus 20 to switch to the eraser function state. In some other embodiments, the user can also click the eraser button in the virtual key area A2 with a finger to switch to the eraser function state. This application does not specifically limit this.

Please refer to FIG. 4 . FIG. 4 is a schematic diagram of the handwriting interface A shown in FIG. 2 when it is in an eraser function state. In this state, the whiteboard area A1 erases the characters or graphics on the movement track of the stylus 20 .

According to the above description, when the user switches to other functions (such as the eraser function, the clear function, the color switching function or the save function) during the writing process in the whiteboard area A1 of the handwriting interface A, the user needs to click the virtual key of the virtual key area A2. Therefore, the user needs to move back and forth between the whiteboard area A1 and the virtual key area A2, and the operation convenience is low.

To solve the above problems, please refer to FIGS. 5 and 6 . FIG. 5 is a front view of a display device 10 provided by some embodiments of the present application, and FIG. 6 is a schematic cross-sectional structure diagram of the display device 10 shown in FIG. 5 at line B-B. The display device 10 is in the shape of a rectangular flat plate. On this basis, in order to facilitate the description of the following embodiments, an XYZ coordinate system is established for the display device 10, and the length direction of the display device 10 is defined as the X-axis direction, the width direction of the display device 10 is the Y-axis direction, and the display device 10 is defined as the Y-axis direction. The thickness direction of 10 is the Z-axis direction. It can be understood that, the coordinate system setting of the display device 10 can be flexibly set according to actual needs, which is not specifically limited here. In some other embodiments, the shape of the display device 10 may also be a square plate shape, a circular plate shape, an oval plate shape, etc., which are not specifically limited herein.

The display device 10 includes a display screen 11 , a first light emitter 12 and a first light receiver 13 .

The display screen 11 is used to display images or videos. The display screen 11 includes, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED). Display, mini organic light-emitting diode (mini organic light-emitting diode) display, micro light-emitting diode (microorganic light-emitting diode) display, micro organic light-emitting diode (micro organic light-emitting diode) display, quantum dot light-emitting diode ( quantum dot light emitting diodes, QLED) displays, etc.

The display screen 11 includes a display surface 111 . The display screen 11 presents images or videos to the user by means of the display surface 111 . The display surface 111 includes a first edge region 111a and a second edge region 111b opposite to each other.

The first light emitter 12 is disposed on the side facing the first edge region 111a. In some embodiments, the orthographic projection of the first light emitter 12 on the first edge region 111a is located in the first edge region 111a. The first light emitter 12 may be attached to the first edge region 111a, or may be spaced apart from the first edge region 111a. The first light receiver 13 is disposed on the side facing the second edge region 111b. In some embodiments, the orthographic projection of the first light receiver 13 on the second edge region 111b is located in the second edge region 111b. The first light receiver 13 may be attached to the second edge region 111b, or may be spaced apart from the second edge region 111b.

The first light transmitter 12 has a first light outlet, the first light receiver 13 has a first light receiving port, and the first light outlet is opposite to the first light receiving port. That is, the first light transmitter 12 is used to transmit the light beam to the first light receiver 13 , and the first light receiver 13 is used to receive the light beam from the first light transmitter 12 .

In the above embodiments, the light beams emitted by the first light transmitter 12 and received by the first light receiver 13 may be visible light, infrared light, and the like. In some embodiments, in order to prevent the light beam from interfering with the display of the display screen 11, the light beam emitted by the first light transmitter 12 and received by the first light receiver 13 may be infrared light, that is, the first light transmitter 12 is infrared light The light transmitter, the first light receiver 13 is an infrared light receiver.

When obstacles with different cross-sectional widths are placed between the first optical transmitter 12 and the first optical receiver 13, the light intensity from the first optical transmitter 12 received by the first optical receiver 13 is different. Generally, when an obstacle with a larger cross-sectional width is placed between the first optical transmitter 12 and the first optical receiver 13, the light intensity from the first optical transmitter 12 received by the first optical receiver 13 When an obstacle with a smaller cross-sectional width is placed between the first optical transmitter 12 and the first optical receiver 13, the light intensity from the first optical transmitter 12 received by the first optical receiver 13 is higher than that of the first optical receiver 13. Small.

On the basis of the above, please continue to refer to FIG. 6 , the display device 10 further includes a second light transmitter 14 and a second light receiver 15 .

The second light emitter 14 is disposed on the side of the first light emitter 12 facing away from the first edge region 111a. In some embodiments, the orthographic projection of the second light emitter 14 on the first edge region 111a is also located at the first edge In the region 111a, optionally, the orthographic projection of the second light emitter 14 on the first edge region 111a at least partially overlaps with the orthographic projection of the first light emitter 12 on the first edge region 111a. The second light emitter 14 may be attached to the first light emitter 12 or may be spaced apart from the first light emitter 12 . The second light receiver 15 is disposed on the side of the first light receiver 13 facing away from the second edge region 111b. In some embodiments, the orthographic projection of the second light receiver 15 on the second edge region 111b is also located at the second edge In the region 111b, optionally, the orthographic projection of the second light receiver 15 on the second edge region 111b at least partially overlaps with the orthographic projection of the first light receiver 13 on the second edge region 111b. The second light receiver 15 may be attached to the first light receiver 13 , or may be spaced apart from the first light receiver 13 .

Since the second light emitter 14 is disposed on the side of the first light emitter 12 facing away from the first edge region 111a, the second light receiver 15 is disposed on the side of the first light receiver 13 facing away from the second edge region 111b Therefore, the optical transmitters and the optical receivers in the upper and lower layers of the optical transmitting and receiving components are centrally arranged, which is convenient for wiring.

In some other embodiments, the arrangement positions of the second optical transmitter 14 and the second optical receiver 15 can be interchanged. That is, the second light receiver 15 is disposed on the side of the first light emitter 12 that faces away from the first edge region 111a. In some embodiments, the orthographic projection of the second light receiver 15 on the first edge region 111a is located at within the first edge region 111a. The second light emitter 14 is disposed on the side of the first light receiver 13 facing away from the second edge region 111b. In some embodiments, the orthographic projection of the second light emitter 14 on the second edge region 111b is located in the second edge region 111b.

The second light transmitter 14 has a second light outlet, the second light receiver 15 has a second light receiver, and the second light outlet is opposite to the second light receiver. That is, the second light transmitter 14 is used to transmit the light beam to the second light receiver 15 , and the second light receiver 15 is used to receive the light beam from the second light transmitter 14 .

In the above embodiment, the light beams emitted by the second light transmitter 14 and received by the second light receiver 15 may be visible light, infrared light, and the like. In some embodiments, in order to prevent the light beam from interfering with the display of the display screen 11, the light beam emitted by the second light transmitter 14 and received by the second light receiver 15 may also be infrared light, that is, the second light transmitter 14 is an infrared light. Infrared light transmitter, the second light receiver 15 is an infrared light receiver.

When obstacles with different cross-sectional widths are placed between the second light transmitter 14 and the second light receiver 15, the light intensity from the second light transmitter 14 received by the second light receiver 15 is different. In general, when an obstacle with a larger cross-sectional width is placed between the second optical transmitter 14 and the second optical receiver 15, the light intensity from the second optical transmitter 14 received by the second optical receiver 15 larger. When an obstacle with a smaller cross-sectional width is placed between the second light transmitter 14 and the second light receiver 15, the light intensity from the second light transmitter 14 received by the second light receiver 15 is smaller.

On the basis of the above, the display device 20 further includes a detection unit (not shown in the figure) and a controller (not shown in the figure). The detection unit is configured to detect the first light intensity received by the first light receiving port of the first light receiver 13 and the second light intensity received by the second light receiving port of the second light receiver 15 . The controller is electrically connected with the detection unit. The controller is configured to output a control signal according to the first light intensity and the second light intensity detected by the detection unit.

Based on the above description, in the display device 20 provided by the embodiment of the present application, two layers of light emitting and receiving components are arranged on two opposite edge regions of the display surface 11 (respectively, the first edge region 111a and the second edge region 111b ). The light transmitting and receiving components are respectively the first light transmitter 12 and the first light receiver 13 on the lower layer, and the second light transmitter 14 and the second light receiver 15 on the upper layer. On the premise that the light intensities emitted by the first light emitter 12 and the second light emitter 14 are approximately equal (that is, the first light emitter 12 and the second light emitter 14 are emitters that emit light beams of approximately equal intensity) , the light intensity received by the first light receiver 13 and the second light receiver 15 can be detected by the detection unit, so as to realize the width detection of the upper and lower parts of the obstacle in the first direction (ie, the Y-axis direction). The first direction is a direction parallel to the display screen 11 and perpendicular to the light emitting directions of the first light emitter 12 and the second light emitter 14 . Obstacles of different shapes in the dimension perpendicular to the display screen 11 can thus be identified. On this basis, the controller can output a control signal according to the first light intensity and the second light intensity detected by the detection unit. In this way, for obstacles with different shapes, the control signals output by the controller can be different to achieve different functions.

For example, when the obstacle is a stylus. Please refer to FIG. 7 , which is a schematic structural diagram of a stylus 20 according to some embodiments of the present application. The stylus 20 can be a solid structure or a hollow structure. Materials of the stylus 20 include, but are not limited to, plastic and metal. The cross-sectional shape, size, and length of the stylus pen 20 are approximately the same as those of a commonly used ballpoint pen and fountain pen.

The stylus 20 includes a pen head 21 , a pen body 22 and a pen tail 23 which are connected in sequence. The changing law of the cross-sectional width of the pen head 21 from the end connecting the pen body 22 to the end away from the pen body 22 is different from the changing law of the cross-sectional width of the pen tail 23 from the end connecting the pen body 22 to the end away from the pen body 22 . In some embodiments, the cross-sectional width of the pen head 21 gradually decreases from one end connected to the pen body 22 to the end away from the pen body 22 , that is, the pen head 21 is tapered. Specifically, the pen head 21 can be in the shape of a cone, a square cone, a triangular pyramid, a polygonal pyramid, and the like. In some embodiments, the width of the cross section of the pen head 21 from the end connected to the pen body 22 to the end away from the pen body 22 is constant, that is, the pen tail 23 is cylindrical. Specifically, the pen tail 23 may be in the shape of a cylinder, a square column, a triangular prism, a polygonal prism, and the like. The cross-sectional widths of the pen head 21 and the pen tail 23 from the end connected to the pen body 22 to the end away from the pen body 22 have different changing laws. After detecting the light intensity received by the first light receiver 13 and the second light receiver 15, According to the first light intensity and the second light intensity, the controller can determine that the head or tail of the stylus is in contact with the display device 10 to output different control signals, so that the function switching of the stylus can be realized without clicking on the display device 10. The virtual buttons on the stylus are more convenient to operate, and there is no need to set switch buttons on the stylus, so the cost is low.

Specifically, when the pen tip 21 contacts the display device 10 shown in FIG. 6 , please refer to FIG. 8 , which is a schematic structural diagram when the pen tip 21 of the stylus 20 contacts the display device 10 shown in FIG. 6 . The light beam emitted by the first light transmitter 12 passes through the part where the cross-sectional width of the pen head 21 is smaller, and the light intensity received by the first light receiver 13 is larger. The intensity of the light beam emitted by the second light emitter 14 is approximately equal to the intensity of the light beam emitted by the first light emitter 12 . The light beam emitted by the second light transmitter 14 passes through the larger section width of the pen head 21 , and the light intensity received by the second light receiver 15 is smaller. In this way, by detecting the light intensity received by the first light receiver 13 and the second light receiver 15, it can be recognized that the pen tip 21 of the stylus 20 is in contact with the display screen 11, so that the stylus 20 can be controlled to enter the writing function state.

When the pen tail 23 contacts the display device 10 shown in FIG. 6 , please refer to FIG. 9 . FIG. 9 is a schematic structural diagram when the pen end 23 of the stylus 20 contacts the display device 10 shown in FIG. 6 . The cross-sectional width of the light beam emitted by the first light transmitter 12 passing through the pen tail 23 is approximately equal to the cross-sectional width of the light beam emitted by the second light transmitter 14 passing through the pen tail 23 . When the intensity of the light beam emitted by the second light transmitter 14 is approximately equal to the intensity of the light beam emitted by the first light transmitter 12 , the light intensity received by the first light receiver 13 is similar to the light intensity received by the second light receiver 15 equal. In this way, by detecting the light intensity received by the first light receiver 13 and the second light receiver 15, it can be recognized that the pen tail 23 of the stylus 20 is in contact with the display screen 11, so that the stylus 20 can be controlled to switch to an eraser such as an eraser Function status, clear function status, color switch function status, or save function status. Therefore, there is no need to click the virtual keys on the display device 10, the operation convenience is high, and there is no need to set switch keys on the stylus, so the cost is low.

It should be noted that the pen tip 21 may also be in an inverted cone shape, that is, the cross-sectional width of the pen tip 21 gradually decreases from the end away from the pen body 22 to the end connected to the pen body 22 . The pen head 21 can also be in the shape of a column, and the pen tail 23 can be in the shape of a cone or an inverted cone. As long as the change law of the cross-sectional width of the pen head 21 from the end connecting the pen body 22 to the end away from the pen body 22 is different from the change law of the cross-sectional width of the pen tail 23 from the end connecting the pen body 22 to the end away from the pen body 22, here No specific limitation is made. In addition, the obstacle is not limited to the above-mentioned stylus 20, but can also be a human hand. With the aid of two layers of light emitting and receiving components, the detection of human gestures can be realized.

It can be understood that, in order to identify obstacles with different shapes in the dimension perpendicular to the display screen 11 , the display device 20 may also be provided with more than two layers of light emitting and receiving components. For example, three layers, four layers or five layers of light emitting and receiving components can be provided. The more layers are provided, the more shapes of obstacles that can be detected and the more abundant the control, but the more complex the structure of the display device 20 is. Therefore, according to different application scenarios, the user can comprehensively consider the control requirements and the structural complexity of the display device 20 to select an appropriate number of layers of light emitting and receiving components.

The number of the first optical transmitter 12 , the first optical receiver 13 , the second optical transmitter 14 and the second optical receiver 15 may be one or more.

When the number of the first optical transmitter 12 , the first optical receiver 13 , the second optical transmitter 14 and the second optical receiver 15 is one, the stylus 20 needs to be moved to a position between the one of the first optical transmitters 12 and the second optical receiver 15 . Function switching can be realized only in the areas between the one first optical receiver 13 and between the one second optical transmitter 14 and the one second optical receiver 15 .

In some embodiments, please refer to FIG. 10 . FIG. 10 shows the display screen 11 and the first light emitter 12 , the first light receiver 13 , the second light emitter 14 and the second light in the display device 10 shown in FIG. 6 . A perspective view of the assembled structure of the receiver 15 . In this embodiment, the display surface 111 of the display screen 11 includes a first side 1111 and a second side 1112 opposite to each other. The first edge region 111 a and the second edge region 111 b are located between the first side 1111 and the second side 1112 , the first edge region 111 a is adjacent to the first side 1111 , and the second edge region 111 b is adjacent to the second side 1112 .

On this basis, the numbers of the first optical transmitters 12 and the first optical receivers 13 are both plural. The plurality of first light emitters 12 are arranged along the first side 1111 , and the plurality of first light receivers 13 are arranged along the second side 1112 . The first light-emitting ports of the plurality of first light transmitters 12 are respectively opposite to the first light-receiving ports of the plurality of first light receivers 13 , that is, the plurality of first light transmitters 12 are respectively used to transmit to the plurality of first light receivers 13 . The light receivers 13 emit light beams, and the plurality of first light receivers 13 are respectively configured to receive light beams from the plurality of first light transmitters 12 . Specifically, a plurality of first optical transmitters 12 and a plurality of first optical receivers 13 may correspond one-to-one, that is, one first optical transmitter 12 only emits light beams to one first optical receiver 13, and the one The first optical receiver 13 is also only used to receive the light beam from one first optical transmitter 12, and it can also be that one first optical transmitter 12 corresponds to a plurality of first optical receivers 13, or a plurality of first optical transmitters The device 12 corresponds to one first optical receiver 13, or the three may coexist, which is not specifically limited in this embodiment of the present application.

Please continue to refer to FIG. 10 , the number of the second optical transmitter 14 and the second optical receiver 15 may also be multiple. The plurality of second light emitters 14 are arranged along the first side 1111 , and the plurality of second light receivers 15 are arranged along the second side 1112 . The second light-emitting ports of the plurality of second light transmitters 14 are respectively opposite to the second light-receiving ports of the plurality of second light receivers 15 , that is, the plurality of second light transmitters 14 are respectively used to transmit to the plurality of second light receivers 15 . The light receivers 15 emit light beams, and the plurality of second light receivers 15 are respectively configured to receive light beams from the plurality of second light transmitters 14 . Specifically, the plurality of second optical transmitters 14 and the plurality of second optical receivers 15 may be in one-to-one correspondence, or one second optical transmitter 14 may correspond to the plurality of second optical receivers 15, or a plurality of Two optical transmitters 14 correspond to one second optical receiver 15, or three of them may coexist.

When the second light receiver 15 is disposed on the side of the first light emitter 12 facing away from the first edge region 111a, the second light emitter 14 is disposed on the side of the first light receiver 13 facing away from the second edge region 111b , the plurality of second light emitters 14 are arranged along the second side 1112 , and the plurality of second light receivers 15 are arranged along the first side 1111 .

In this way, when the stylus 20 moves to multiple positions in the area between the first edge region 111 a and the second edge region 111 b on the display surface 111 , function switching can be realized, which is more convenient.

On the basis of the above-mentioned embodiment, by reasonably setting between two adjacent first optical transmitters 12, between two adjacent first optical receivers 13, between two adjacent second optical transmitters 14, and The distance between two adjacent second light receivers 15 can achieve full coverage of the light beam in the area between the first edge region 111 a and the second edge region 111 b in the display surface 111 . In this way, when the stylus 20 moves to any position in the area between the first edge region 111a and the second edge region 111b on the display surface 111 , function switching can be realized, which is more convenient.

The first edge area 111 a and the second edge area 111 b may be non-display areas of the display surface 111 , or may be partially display areas of the display surface 111 and partially non-display areas of the display surface 111 .

In some embodiments, please refer to FIG. 11 , which is a front view of the display screen 11 of the display device 10 shown in FIG. 6 . The display surface 111 of the display screen 11 includes a display area Q1 and a first non-display area Q2 and a second non-display area Q3 disposed around the edge of the display area Q1.

It should be noted that the display area Q1 is an area formed by a portion of the display screen 11 for displaying images and videos. In other words, the display area Q1 is also an area formed by the portion of the display screen 11 where the array pixel dots are arranged. The display area Q1 is a certain area surrounded by the non-display area. When the display device 10 has black spots and bright lines in the display area Q1 due to accidents such as drop, impact, scratches, etc. It still belongs to the display area Q1 of the display surface. The non-display area (including the first non-display area Q2 and the second non-display area Q3 ) is an area formed by a portion of the display screen 11 that is not used for display. In other words, the non-display area is also an area formed by the portion of the display screen 11 where the array pixels are not arranged. The portion of the display screen 11 where the array pixel points are not arranged usually has signal wirings and packaging structures.

The edge of the display area Q1 includes the opposite third and fourth sides Q11 and Q12. The third side Q11 and the fourth side Q12 are located between the first side 1111 and the second side 1112, and the third side Q11 is located between the first side 1111 and the fourth side Q12. The first non-display area Q2 is located between the first side 1111 and the third side Q11, and the first side 1111 and the third side Q11 form two opposite edges of the first non-display area Q2. The first non-display area Q2 forms a first edge area 111a. The second non-display area Q3 is located between the second side 1112 and the fourth side Q12, and the second side 1112 and the fourth side Q12 form opposite edges of the second non-display area Q3. The second non-display area Q3 forms the second edge area 111b.

In this way, the first edge region 111a and the second edge region 111b are respectively the non-display regions at opposite ends of the display surface, and the first light emitter 12 and the second light emitter are disposed on the side facing the first edge region 111a. The device 14 , and the first light receiver 13 and the second light receiver 15 disposed on the side facing the second edge region 111 b will not interfere with the normal display of the display screen 11 .

In some embodiments, please refer back to FIG. 6 , the display device 10 further includes a face frame K, and the face frame K plays a role of decoration, shielding and protection. In some embodiments, the face frame K includes a first shielding portion K1 and a second shielding portion K2. The first shielding portion K1 is located on the side toward which the first edge region 111a faces, and the second shielding portion K2 is located on the side toward which the second edge region 111b faces. The first light emitter 12 and the second light emitter 14 are disposed between the first shielding portion K1 and the first edge region 111a. The first light receiver 13 and the second light receiver 15 are disposed between the second shielding portion K2 and the second edge region 111b. In this way, the cover, decoration and protection of the first light transmitter 12 , the first light receiver 13 , the second light transmitter 14 and the second light receiver 15 can be realized by the cover frame K.

It should be noted that when the second light transmitter 14 is disposed on the side of the first light receiver 13 facing away from the second edge region 111b, the second light receiver 15 is disposed on the first light transmitter 12 facing away from the first edge On one side of the area 111a, the first light transmitter 12 and the second light receiver 15 are disposed between the first shielding portion K1 and the first edge area 111a, and the first light receiver 13 and the second light transmitter 14 are disposed between the second shielding portion K2 and the second edge region 111b.

In order to detect the movement track of the stylus 20 on the display device 10, so as to realize the handwriting function or the eraser function. The display device 10 may detect the position of the stylus 20 on the display device 10 in real time by means of infrared or capacitive means, so as to realize the detection of the movement track. The embodiment shown below is described by taking the infrared method to detect the movement trajectory of the stylus 20 as an example, which should not be considered as a special limitation to the present application.

In some embodiments, please continue to refer to FIG. 11 , the display surface 111 of the display screen 11 not only includes the first edge region 111 a and the second edge region 111 b , but also includes the opposite third edge region 111 c and the fourth edge region 111 d . The third edge region 111c and the fourth edge region 111d are located between the first edge region 111a and the second edge region 111b.

On the basis of the above, please refer to FIG. 12 , which is a perspective view of a display device 10 according to further embodiments of the present application. The differences between this embodiment and the display device 10 shown in FIG. 10 include: the display device 10 includes the first light emitter 12 , the first light receiver 13 , the second light emitter 14 and the second light receiver 15 except for the display device 10 . In addition, a third optical transmitter 16 and a third optical receiver 17 are also included.

The third light emitter 16 is disposed on the side toward which the third edge region 111c faces. In some embodiments, the orthographic projection of the third light emitter 16 on the third edge region 111c is located within the third edge region 111c. The third light emitter 16 may be attached to the third edge region 111c, or may be spaced apart from the third edge region 111c. The third light receiver 17 is disposed on the side toward which the fourth edge region 111d faces. In some embodiments, the orthographic projection of the third light receiver 17 on the fourth edge region 111d is located within the fourth edge region 111d. The third light receiver 17 may be in contact with the fourth edge region 111d, or may be spaced apart from the fourth edge region 111d.

The third light transmitter 16 has a third light outlet, the third light receiver 17 has a third light receiver, and the third light outlet is opposite to the third light receiver. That is, the third light transmitter 16 is used to transmit the light beam to the third light receiver 17 , and the third light receiver 17 is used to receive the light beam from the third light transmitter 16 .

In the above embodiment, the light beams emitted by the third light transmitter 16 and received by the third light receiver 17 may be visible light, infrared light, and the like. In some embodiments, in order to prevent the light beam from interfering with the display of the display screen 11, the light beam emitted by the third light transmitter 16 and received by the third light receiver 17 may be infrared light, that is, the third light transmitter 16 is infrared light The light transmitter, the third light receiver 17 is an infrared light receiver.

When the stylus 20 is moved over a partial area of the display surface 111 surrounded by the first edge region 111a, the second edge region 111b, the third edge region 111c and the fourth edge region 111d, the third light emitter 16, The third optical receiver 17 cooperates with the first optical transmitter 12, the first optical receiver 13, or by means of the third optical transmitter 16, the third optical receiver 17 and the second optical transmitter 14, the second optical receiver 15 cooperate to realize the position detection of the stylus 20 in the plane. Please refer to FIG. 13 . FIG. 13 includes the first optical transmitter 12 , the first optical receiver 13 , the second optical transmitter 14 , the second optical receiver 15 , the third optical transmitter 16 and the third optical transmitter 12 shown in FIG. 12 . Front view of the display device 10 of the light receiver 17 . The position detection of the stylus 20 in the display interface can be realized by means of the plurality of light beams transmitted in the X-axis direction and the plurality of light beams transmitted in the Y-axis direction. In this way, the movement trajectory detection of the stylus 20 is realized. The structure used in this detection method is independent of the display screen 11 , so the assembly and maintenance costs are low, and it is widely used.

In some embodiments, referring back to FIG. 11 , the display surface 111 of the display screen 11 includes opposite fifth sides 1113 and sixth sides 1114 . The third edge region 111c and the fourth edge region 111d are located between the fifth side 1113 and the sixth side 1114 , the third edge region 111c is adjacent to the fifth side 1113 , and the fourth edge region 111d is adjacent to the sixth side 1114 .

On this basis, please refer to FIG. 12 , the number of the third optical transmitter 16 and the third optical receiver 17 is multiple. The plurality of third light emitters 16 are arranged along the fifth side 1113 , and the plurality of third light receivers 17 are arranged along the sixth side 1114 . The third light exit ports of the plurality of third light receivers 17 are respectively opposite to the third light receiving ports of the plurality of third light receivers 17 , that is to say, the plurality of third light transmitters 16 are respectively used to transmit to the plurality of third light receivers 17 . The light receivers 17 emit light beams, and the plurality of third light receivers 17 are respectively configured to receive light beams from the plurality of third light transmitters 16 . Specifically, the plurality of third optical transmitters 16 and the plurality of third optical receivers 17 may correspond one-to-one, that is, one third optical transmitter 16 only emits light beams to one third optical receiver 17, and the one The third optical receiver 17 is also only used to receive the light beam from one third optical transmitter 16, and it can also be one third optical transmitter 16 corresponding to multiple third optical receivers 17, or multiple third optical transmitters The optical receiver 16 corresponds to a third optical receiver 17, or the three optical receivers may coexist, which is not specifically limited in this embodiment of the present application.

In this way, when the stylus 20 moves over a larger area of the display surface 111 surrounded by the first edge region 111a, the second edge region 111b, the third edge region 111c, and the fourth edge region 111d, all can use the third edge region 111d. The optical transmitter 16, the third optical receiver 17 cooperate with the first optical transmitter 12, the first optical receiver 13, or the third optical transmitter 16, the third optical receiver 17 and the second optical transmitter 14, The second optical receiver 15 cooperates to realize the position detection of the stylus 20 in the plane, the handwriting interface is larger, and the handwriting performance is better.

On the basis of the above-mentioned embodiment, by reasonably setting the distance between two adjacent third light emitters 16 and between two adjacent third light receivers 17 , it is possible to realize that the light beam is transmitted by the first light beam in the display surface 111 by the first light beam. Full coverage of the area surrounded by the edge region 111a, the second edge region 111b, the third edge region 111c and the fourth edge region 111d. Thereby, the handwriting performance of the display device can be further improved.

On the basis of the above embodiments, in order to accurately identify obstacles with different shapes in the dimension perpendicular to the display screen 11, in some embodiments, please refer to FIG. 14, which is a display device provided by further embodiments of the present application 10's perspective view. The differences between this embodiment and the display device 10 shown in FIG. 12 include: the display device 10 includes a first light transmitter 12 , a first light receiver 13 , a second light transmitter 14 , a second light receiver 15 , In addition to the third optical transmitter 16 and the third optical receiver 17 , a fourth optical transmitter 18 and a fourth optical receiver 19 are also included.

The fourth light emitter 18 is disposed on the side of the third light emitter 16 facing away from the third edge region 111c. In some embodiments, the orthographic projection of the fourth light emitter 18 on the third edge region 111c is also located at the third edge In the region 111c, optionally, the orthographic projection of the fourth light emitter 18 on the third edge region 111c at least partially overlaps with the orthographic projection of the third light emitter 16 on the third edge region 111c. The fourth light emitter 18 may be attached to the third light emitter 16 or may be spaced apart from the third light emitter 16 . The fourth light receiver 19 is disposed on the side of the third light receiver 17 facing away from the fourth edge region 111d. In some embodiments, the orthographic projection of the fourth light receiver 19 on the fourth edge region 111d is also located at the fourth edge In the region 111d, optionally, the orthographic projection of the fourth light receiver 19 on the fourth edge region 111d at least partially overlaps with the orthographic projection of the third light receiver 17 on the fourth edge region 111d. The fourth light receiver 19 may be attached to the third light receiver 17 or may be spaced apart from the third light receiver 17 .

Since the fourth light emitter 18 is disposed on the side of the third light emitter 16 facing away from the third edge region 111c, the fourth light receiver 19 is disposed on the side of the third light receiver 17 facing away from the fourth edge region 111d Therefore, the optical transmitters and the optical receivers in the upper and lower layers of the optical transmitting and receiving components are centrally arranged, which is convenient for wiring.

In some other embodiments, the arrangement positions of the fourth optical transmitter 18 and the fourth optical receiver 19 can be interchanged. That is, the fourth light receiver 19 is disposed on the side of the third light emitter 16 facing away from the third edge region 111c. In some embodiments, the orthographic projection of the fourth light receiver 19 on the third edge region 111c is located at within the third edge region 111c. The fourth light emitter 18 is disposed on the side of the third light receiver 17 facing away from the fourth edge region 111d. In some embodiments, the orthographic projection of the fourth light emitter 18 on the fourth edge region 111d is located in the fourth edge region 111d.

The fourth light transmitter 18 has a fourth light outlet, the fourth light receiver 19 has a fourth light receiver, and the fourth light outlet is opposite to the fourth light receiver. That is, the fourth light transmitter 18 is used to transmit the light beam to the fourth light receiver 19 , and the fourth light receiver 19 is used to receive the light beam from the fourth light transmitter 18 .

In the above-mentioned embodiment, the light beams emitted by the fourth light transmitter 18 and received by the fourth light receiver 19 may be visible light, infrared light, or the like. In some embodiments, in order to prevent the light beam from interfering with the display of the display screen 11, the light beam emitted by the fourth light transmitter 18 and received by the fourth light receiver 19 may also be infrared light, that is, the fourth light transmitter 18 is an infrared light. Infrared light transmitter, the fourth light receiver 19 is an infrared light receiver.

The detection unit is further configured to detect the third light intensity received by the third light receiving port of the third light receiver 16 and the fourth light intensity received by the fourth light receiving port of the fourth light receiver 18 . The controller is further configured to output a control signal according to the third light intensity and the fourth light intensity detected by the detection unit.

In this way, when the obstacle touches the display screen 11 of the display device, and the shape of the obstacle is different in the dimension perpendicular to the display screen 11, with the help of the first light emitter 12, the first light receiver 13, the second light The upper and lower two-layer light emitting and receiving components composed of the transmitter 14 and the second light receiver 15 realize the width detection of the upper and lower parts of the obstacle in the first direction (that is, the Y-axis direction), and also use the third The upper and lower two-layer light transmitting and receiving components composed of the optical transmitter 16, the third optical receiver 17, the fourth optical transmitter 18 and the fourth optical receiver 19 realize that the upper and lower parts of the obstacle are in the second direction (that is, is the width detection in the X-axis direction). The first direction is a direction parallel to the display screen 11 and perpendicular to the light emitting directions of the first light emitter 12 and the second light emitter 14 . The second direction is a direction parallel to the display screen 11 and perpendicular to the light-emitting directions of the third light emitters 16 and the fourth light emitters 18 . Thereby, the cross-sectional shapes of the upper and lower parts can be recognized, thereby realizing the recognition of the three-dimensional shape of the obstacle, so as to improve the recognition accuracy of the obstacle and the control accuracy of the display device. For example, when the obstacle is the stylus 20, not only can the width of the upper and lower parts in the first direction be detected to determine whether it is a tapered pen tip 21 or a columnar pen tail 23, but also the width of the upper and lower parts in the first direction can be further detected. The width in the second direction is used to determine the cross-sectional shape of the pen head 21 or the pen tail 23, to determine whether the pen head 21 is in the shape of a cone, a square cone, a triangular pyramid or a polygonal pyramid, and whether the pen tail 23 is cylindrical, square Columnar, triangular prism or polygonal prism. As a result, detection accuracy and control accuracy can be improved.

The number of the fourth optical transmitter 18 and the fourth optical receiver 19 may be one or multiple.

In some embodiments, please continue to refer to FIG. 14 , the number of the fourth optical transmitter 18 and the fourth optical receiver 19 is multiple. The plurality of fourth light emitters 18 are arranged along the fifth side 1113 , and the plurality of fourth light receivers 19 are arranged along the sixth side 1114 . The fourth light-emitting ports of the plurality of fourth light transmitters 18 are respectively opposite to the fourth light-receiving ports of the plurality of fourth light receivers 19 , that is, the plurality of fourth light transmitters 18 are respectively used to transmit to the plurality of fourth light receivers 19 . The light receivers 19 emit light beams, and the plurality of fourth light receivers 19 are respectively configured to receive light beams from the plurality of fourth light transmitters 18 . Specifically, the plurality of fourth optical transmitters 18 and the plurality of fourth optical receivers 19 may correspond one-to-one, or one fourth optical transmitter 18 may correspond to the plurality of fourth optical receivers 19 , or a plurality of The four optical transmitters 18 correspond to one fourth optical receiver 19, and three of them may coexist.

When the fourth light receiver 19 is disposed on the side of the third light emitter 16 facing away from the third edge region 111c, the fourth light emitter 18 is disposed on the side of the third light receiver 17 facing away from the fourth edge region 111d , the plurality of fourth light emitters 18 are arranged along the sixth side 1114 , and the plurality of fourth light receivers 19 are arranged along the fifth side 1113 .

In this way, when the stylus 20 moves to multiple positions in the area surrounded by the first edge area 111a , the second edge area 111b , the third edge area 111c and the fourth edge area 111d on the display surface 111 , the Detection is more convenient.

It should be noted that there are multiple first optical transmitters 12 , multiple first optical receivers 13 , multiple second optical transmitters 14 , multiple second optical receivers 15 , and multiple third optical transmitters 16 . , a plurality of third light receivers 17, a plurality of fourth light emitters 18 and a plurality of fourth light receivers 19 display devices, in addition to the three-dimensional shape detection of obstacles to achieve different functions, also Gestures that move in three-dimensional space can be recognized. For example, please refer to FIG. 15 , which is a schematic diagram of a usage scenario of the display device 10 provided by some embodiments of the present application. When the user performs a page turning operation on the display device 10, the movement trajectory line 1 of the page turning gesture is an arc line located on the side toward which the display surface 111 faces and arched toward the display surface 111. In this scenario, the upper and lower layers of light emitting and receiving components can be used to realize real-time position detection of the human hand within the range of the three-dimensional space on the side facing the display surface 111 to detect gestures moving in the three-dimensional space, thereby realizing flipping. page function.

In some embodiments, referring to FIG. 14 , the first optical transmitter 12 , the first optical receiver 13 , the third optical transmitter 16 and the third optical receiver 17 are approximately arranged in the same plane, and the first optical transmitter The plane on which the transmitter 12 , the first light receiver 13 , the third light transmitter 16 and the third light receiver 17 are arranged is substantially parallel to the display surface 111 . The second optical transmitter 14 , the second optical receiver 15 , the fourth optical transmitter 18 and the fourth optical receiver 19 are approximately arranged in the same plane, and the second optical transmitter 14 , the second optical receiver 15 , the The plane on which the four light emitters 18 and the fourth light receivers 19 are arranged is substantially parallel to the display surface 111 . In this way, the cross-sectional shape detection of a part of the obstacle is realized by the first light transmitter 12 , the first light receiver 13 , the third light transmitter 16 and the third light receiver 17 , and the second light transmitter 14 , the second light receiver 15 , the fourth light transmitter 18 and the fourth light receiver 19 realize the cross-sectional shape detection of another part of the obstacle.

The third edge area 111 c and the fourth edge area 111 d may be non-display areas of the display surface 111 , or may be partially display areas of the display surface 111 and partially non-display areas of the display surface 111 .

In some embodiments, referring back to FIG. 11 , the display surface 111 of the display screen 11 further includes a third non-display area Q4 and a fourth non-display area Q5 .

The edge of the display area Q1 includes the opposite seventh and eighth sides Q13 and Q14. The seventh side Q13 and the eighth side Q14 are located between the fifth side 1113 and the sixth side 1114, and the seventh side Q13 is located between the first side 1111 and the eighth side Q14. The third non-display area Q4 is located between the first side 1111 and the seventh side Q13, and the first side 1111 and the seventh side Q13 form two opposite edges of the third non-display area Q4, and the third non-display area Q4 forms the third non-display area Q4. edge region 111c. The fourth non-display area Q5 is located between the sixth side 1114 and the eighth side Q14, and the sixth side 1114 and the eighth side Q14 form opposite edges of the fourth non-display area Q5, and the fourth non-display area Q5 forms the fourth non-display area Q5. edge region 111d.

In this way, the third edge region 111c and the fourth edge region 111d are respectively the non-display regions at opposite ends of the display surface, and the third light emitter 16 and the fourth light emitter are disposed on the side facing the third edge region 111c. The device 18 , and the third light receiver 17 and the fourth light receiver 19 disposed on the side toward which the fourth edge region 111 d faces will not interfere with the display of the display screen 11 .

The present application also provides a control method of the display device 10 . The display device 10 includes a display screen 11 , a first light transmitter 12 , a first light receiver 13 , a second light transmitter 14 and a second light receiver 15 .

The display screen 11 includes a display surface 111 . The display surface 111 includes a first edge region 111a and a second edge region 111b opposite to each other. The first light emitter 12 is disposed on the side toward which the first edge region 111a faces. In some embodiments, the orthographic projection of the first light emitter 12 on the first edge region 111a is located within the first edge region 111a. The first light receiver 13 is disposed on the side toward which the second edge region 111b faces. In some embodiments, the orthographic projection of the first light receiver 13 on the second edge region 111b is located in the second edge region 111b.

The first light transmitter 12 has a first light outlet, the first light receiver 13 has a first light receiving port, and the first light outlet is opposite to the first light receiving port. That is, the first light transmitter 12 is used to transmit the light beam to the first light receiver 13 , and the first light receiver 13 is used to receive the light beam from the first light transmitter 12 .

The second light emitter 14 is disposed on the side of the first light emitter 12 facing away from the first edge region 111a. In some embodiments, the orthographic projection of the second light emitter 14 on the first edge region 111a is also located at the first edge In the region 111a, optionally, the orthographic projection of the second light emitter 14 on the first edge region 111a at least partially overlaps with the orthographic projection of the first light emitter 12 on the first edge region 111a. The second light emitter 14 may be attached to the first light emitter 12 or may be spaced apart from the first light emitter 12 . The second light receiver 15 is disposed on the side of the first light receiver 13 facing away from the second edge region 111b. In some embodiments, the orthographic projection of the second light receiver 15 on the second edge region 111b is also located at the second edge In the region 111b, optionally, the orthographic projection of the second light receiver 15 on the second edge region 111b at least partially overlaps with the orthographic projection of the first light receiver 13 on the second edge region 111b. The second light receiver 15 may be attached to the first light receiver 13 , or may be spaced apart from the first light receiver 13 .

In some other embodiments, the arrangement positions of the second optical transmitter 14 and the second optical receiver 15 can be interchanged. That is, the second light receiver 15 is disposed on the side of the first light emitter 12 that faces away from the first edge region 111a. In some embodiments, the orthographic projection of the second light receiver 15 on the first edge region 111a is located at within the first edge region 111a. The second light emitter 14 is disposed on the side of the first light receiver 13 facing away from the second edge region 111b. In some embodiments, the orthographic projection of the second light emitter 14 on the second edge region 111b is located in the second edge region 111b.

The second light transmitter 14 has a second light outlet, the second light receiver 15 has a second light receiver, and the second light outlet is opposite to the second light receiver. That is, the second light transmitter 14 is used to transmit the light beam to the second light receiver 15 , and the second light receiver 15 is used to receive the light beam from the second light transmitter 14 .

Please refer to FIG. 16 , FIG. 16 provides a flowchart of a control method of the display device 10 according to some embodiments of the present application. Control methods include:

Step S100 : Detect the first light intensity received by the first light receiving port of the first optical receiver 13 and the second light intensity received by the second light receiving port of the second light receiver 15 .

Step S200: Output a control signal according to the first light intensity and the second light intensity.

In this way, obstacles of different shapes can be identified in the dimension perpendicular to the display screen 11 . And for obstacles with different shapes, output different control signals to control to achieve different functions. When the obstacle is a stylus, the head and tail of the stylus can be designed as follows: the change rule of the cross-sectional width of the head from the end connected to the pen body to the end away from the pen body and the pen tail from the end connected to the pen body to the end away from the pen The width of one end of the stylus has different changing rules, so that when the head and tail of the stylus touch the display screen, different control signals are output, so that the function switching of the stylus can be realized without clicking the virtual button on the display device. The operation convenience is high, and there is no need to set switch buttons on the stylus, so the cost is low.

In some embodiments, step S200 includes:

When the first light intensity is greater than the second light intensity, and the difference between the first light intensity and the second light intensity is greater than or equal to the first preset threshold, it is recognized that the obstacle is in the shape of a cone, and a first control signal is output at this time, and the first control signal is output. A control signal is used to control activation of the first function of the display device.

When the absolute value of the difference between the first light intensity and the second light intensity is less than or equal to the second preset threshold, it is recognized that the obstacle is in the shape of a column, and a second control signal is output, and the second control signal is used to control the second control signal to activate the display device. Function. The second function is different from the first function, and the second preset threshold is smaller than the first preset threshold.

In this way, the head and tail of the stylus can be set to be cone-shaped and column-shaped, respectively, and the range of the first preset threshold and the second preset threshold can be reasonably set to prevent the palm, the back of the hand or other obstacles from touching the display screen. 11, so that when the head and tail of the stylus touch the display device, the first function and the second function can be controlled to be activated respectively.

In some embodiments, the first function is a writing function. Thereby, it is possible to switch between the writing function and other functions.

In some embodiments, the second function is an eraser function, a clear function, a color switching function, or a save function. It is thus possible to switch between the writing function and the eraser function, the clearing function, the color switching function or the saving function.

In some embodiments, the display surface 111 of the display screen 11 further includes an opposite third edge region 111c and a fourth edge region 111d. The third edge region 111c and the fourth edge region 111d are located between the first edge region 111a and the second edge region 111b. The display device 10 also includes a third light transmitter 16 , a third light receiver 17 , a fourth light transmitter 18 and a fourth light receiver 19 .

The third light emitter 16 is disposed on the side toward which the third edge region 111c faces. In some embodiments, the orthographic projection of the third light emitter 16 on the third edge region 111c is located within the third edge region 111c. The third light emitter 16 may be attached to the third edge region 111c, or may be spaced apart from the third edge region 111c. The third light receiver 17 is disposed on the side toward which the fourth edge region 111d faces. In some embodiments, the orthographic projection of the third light receiver 17 on the fourth edge region 111d is located within the fourth edge region 111d. The third light receiver 17 may be in contact with the fourth edge region 111d, or may be spaced apart from the fourth edge region 111d.

The third light transmitter 16 has a third light outlet, the third light receiver 17 has a third light receiver, and the third light outlet is opposite to the third light receiver. That is, the third light transmitter 16 is used to transmit the light beam to the third light receiver 17 , and the third light receiver 17 is used to receive the light beam from the third light transmitter 16 .

The fourth light emitter 18 is disposed on the side of the third light emitter 16 facing away from the third edge region 111c. In some embodiments, the orthographic projection of the fourth light emitter 18 on the third edge region 111c is also located at the third edge In the region 111c, optionally, the orthographic projection of the fourth light emitter 18 on the third edge region 111c at least partially overlaps with the orthographic projection of the third light emitter 16 on the third edge region 111c. The fourth light emitter 18 may be attached to the third light emitter 16 or may be spaced apart from the third light emitter 16 . The fourth light receiver 19 is disposed on the side of the third light receiver 17 facing away from the fourth edge region 111d. In some embodiments, the orthographic projection of the fourth light receiver 19 on the fourth edge region 111d is also located at the fourth edge In the region 111d, optionally, the orthographic projection of the fourth light receiver 19 on the fourth edge region 111d at least partially overlaps with the orthographic projection of the third light receiver 17 on the fourth edge region 111d. The fourth light receiver 19 may be attached to the third light receiver 17 or may be spaced apart from the third light receiver 17 .

In some other embodiments, the arrangement positions of the fourth optical transmitter 18 and the fourth optical receiver 19 can be interchanged. That is, the fourth light receiver 19 is disposed on the side of the third light emitter 16 facing away from the third edge region 111c. In some embodiments, the orthographic projection of the fourth light receiver 19 on the third edge region 111c is located at within the third edge region 111c. The fourth light emitter 18 is disposed on the side of the third light receiver 17 facing away from the fourth edge region 111d. In some embodiments, the orthographic projection of the fourth light emitter 18 on the fourth edge region 111d is located in the fourth edge region 111d.

The fourth light transmitter 18 has a fourth light outlet, the fourth light receiver 19 has a fourth light receiver, and the fourth light outlet is opposite to the fourth light receiver. That is, the fourth light transmitter 18 is used to transmit the light beam to the fourth light receiver 19 , and the fourth light receiver 19 is used to receive the light beam from the fourth light transmitter 18 .

Please refer to FIG. 17 . FIG. 17 is a flowchart of a control method of the display device 10 provided by further embodiments of the present application, and the control method further includes:

Step S300 : Detect the third light intensity received by the third light receiving port of the third optical receiver 17 and the fourth light intensity received by the fourth light receiving port of the fourth light receiver 19 .

Step S300 may be performed after step S100, may also be performed before step S100, or may be performed simultaneously with step S100, which is not specifically limited herein. In the embodiment shown in FIG. 17, step S300 is performed after step S100.

Based on the above, step S200 includes: outputting a control signal according to the first light intensity, the second light intensity, the third light intensity and the fourth light intensity.

In this way, when the obstacle touches the display screen 11 of the display device, and the shape of the obstacle is different in the dimension perpendicular to the display screen 11, with the help of the first light emitter 12, the first light receiver 13, the second light The upper and lower two-layer light emitting and receiving components composed of the transmitter 14 and the second light receiver 15 are used to detect the width of the upper and lower parts of the obstacle in the first direction, and the third light transmitter 16, the third light The receiver 17 , the fourth optical transmitter 18 and the fourth optical receiver 19 are composed of the upper and lower two-layer light-emitting and receiving components, which realize the width detection of the upper and lower parts of the obstacle in the second direction. The first direction is a direction parallel to the display screen 11 and perpendicular to the light emitting directions of the first light emitter 12 and the second light emitter 14 . The second direction is a direction parallel to the display screen 11 and perpendicular to the light emitting directions of the third light emitters 16 and the fourth light emitters 18 . Thereby, the cross-sectional shapes of the upper and lower parts can be recognized, thereby realizing the recognition of the three-dimensional shape of the obstacle, so as to improve the recognition accuracy of the obstacle and the control accuracy of the display device. For example, when the obstacle is the stylus 20, not only can the width of the upper and lower parts in the first direction be detected to determine whether it is a tapered pen tip 21 or a columnar pen tail 23, but also the width of the upper and lower parts in the first direction can be further detected. The width in the second direction is used to determine the cross-sectional shape of the pen head 21 or the pen tail 23, to determine whether the pen head 21 is in the shape of a cone, a square cone, a triangular pyramid or a polygonal pyramid, and whether the pen tail 23 is cylindrical, square Columnar, triangular prism or polygonal prism. As a result, detection accuracy and control accuracy can be improved.

On the basis of the above, according to the first light intensity, the second light intensity, the third light intensity and the fourth light intensity, the output control signal may include:

When the first light intensity is greater than the second light intensity, the third light intensity is greater than the fourth light intensity, and the difference between the first light intensity and the second light intensity and the difference between the third light intensity and the fourth light intensity are greater than or equal to the first light intensity When a preset threshold is reached, the identified obstacle is in the shape of a cone, and at this time, a first control signal is output, and the first control signal is used to control the activation of the first function of the display device.

When the absolute value of the difference between the first light intensity and the second light intensity and the absolute value of the difference between the third light intensity and the fourth light intensity are both less than or equal to the second preset threshold, the identified obstacle is cylindrical. A second control signal is output, and the second control signal is used to control the activation of the second function of the display device. The second function is different from the first function, and the second preset threshold is smaller than the first preset threshold.

In this way, the head and tail of the stylus can be set to be conical and cylindrical, respectively, and the ranges of the first preset threshold and the second preset threshold can be reasonably set to exclude the palm, the back of the hand or other obstacles from contacting the display. The scene of the screen 11 can be controlled to activate the first function and the second function respectively when the head and tail of the stylus touch the display device.

In the description of this specification, the particular features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims (19)

1. A display device is characterized by comprising a display screen, a first light emitter, a first light receiver, a second light emitter, a second light receiver, a detection unit and a controller;

the display screen comprises a display surface, wherein the display surface comprises a first edge area and a second edge area which are opposite;

the first optical transmitter is arranged on one side, facing the first edge area, the first optical receiver is arranged on one side, facing the second edge area, the first optical transmitter is provided with a first light outlet, the first optical receiver is provided with a first light receiving port, and the first light outlet is opposite to the first light receiving port;

one of the second optical transmitter and the second optical receiver is arranged on the side of the first optical transmitter opposite to the first edge area, the other of the second optical transmitter and the second optical receiver is arranged on the side of the first optical receiver opposite to the second edge area, the second optical transmitter is provided with a second light outlet, the second optical receiver is provided with a second light receiving port, and the second light receiving port is opposite to the second light outlet;

the detection unit is used for detecting first light intensity received by a first light receiving port of the first optical receiver and second light intensity received by a second light receiving port of the second optical receiver;

the controller is used for outputting a control signal according to the first light intensity and the second light intensity detected by the detection unit.

2. The display device of claim 1, wherein the display surface includes opposing first and second edges, the first and second edge regions being located between the first and second edges, and the first edge region abutting the first edge and the second edge region abutting the second edge;

the number of the first optical transmitters and the number of the first optical receivers are both multiple, the multiple first optical transmitters are arranged along the first edge, the multiple first optical receivers are arranged along the second edge, and first light outlets of the multiple first optical transmitters are respectively opposite to first light receiving outlets of the multiple first optical receivers;

the number of the one of the second optical transmitter and the second optical receiver is plural, the plural one is arranged along the first edge, the number of the other of the second optical transmitter and the second optical receiver is plural, the plural other is arranged along the second edge, and the second light outlets of the plural second optical transmitters are respectively opposite to the second light receiving outlets of the plural second optical receivers.

3. The display device according to claim 2, wherein the display surface includes a display area and first and second non-display areas provided around an edge of the display area, the edge of the display area including third and fourth opposing edges, the third and fourth edges being located between the first and second edges, the third edge being located between the first and fourth edges;

the first non-display area is positioned between the first edge and the third edge, the first edge and the third edge form two opposite edges of the first non-display area, and the first non-display area forms the first edge area;

the second non-display area is located between the second edge and the fourth edge, the second edge and the fourth edge form two opposite edges of the second non-display area, and the second non-display area forms the second edge area.

4. The display device according to any one of claims 1-3, wherein the display surface further comprises opposing third and fourth edge regions, the third and fourth edge regions being located between the first and second edge regions;

the display device further comprises a third light emitter and a third light receiver; the third optical transmitter is arranged on one side, towards which the third edge area faces, of the fourth edge area, the third optical receiver is arranged on one side, towards which the fourth edge area faces, of the fourth edge area, the third optical transmitter is provided with a third light outlet, the third optical receiver is provided with a third light receiving port, and the third light outlet is opposite to the third light receiving port.

5. The display device of claim 4, wherein the display surface further comprises fifth and sixth opposing edges, the third and fourth edge regions being located between the fifth and sixth edges, and the third edge region abutting the fifth edge and the fourth edge region abutting the sixth edge;

the number of the third light emitters and the number of the third light receivers are both multiple, the multiple third light emitters are arranged along the fifth edge, the multiple third light receivers are arranged along the sixth edge, and third light outlets of the multiple third light emitters are respectively opposite to third light receiving outlets of the multiple third light receivers.

6. The display device according to claim 5, further comprising a fourth light emitter and a fourth light receiver;

one of the fourth optical transmitter and the fourth optical receiver is arranged on a side of the third optical transmitter opposite to the third edge area, the other of the fourth optical transmitter and the fourth optical receiver is arranged on a side of the third optical receiver opposite to the fourth edge area, the fourth optical transmitter is provided with a fourth light outlet, the fourth optical receiver is provided with a fourth light receiving port, and the fourth light receiving port is opposite to the fourth light outlet;

the detection unit is further configured to detect a third light intensity received by a third light receiving port of the third optical receiver and a fourth light intensity received by a fourth light receiving port of the fourth optical receiver;

the controller is further configured to output the control signal according to the third light intensity and the fourth light intensity detected by the detection unit.

7. The display device according to claim 6, wherein the one of the fourth light emitter and the fourth light receiver is plural in number, and the one of the fourth light emitter and the fourth light receiver is plural in number and is arranged along the fifth side;

the other of the fourth optical transmitter and the fourth optical receiver is plural in number, and the other of the fourth optical transmitter and the fourth optical receiver is arranged along the sixth side;

fourth light outlets of the plurality of fourth light emitters are respectively opposite to fourth light receiving outlets of the plurality of fourth light receivers.

8. The display device according to any one of claims 5 to 7, wherein the display surface includes a display area and third and fourth non-display areas provided around an edge of the display area, the edge of the display area including opposing seventh and eighth sides, the seventh and eighth sides being located between the fifth and eighth sides, the seventh side being located between the fifth and eighth sides;

the third non-display area is located between the fifth edge and the seventh edge, the fifth edge and the seventh edge form two opposite edges of the third non-display area, and the third non-display area forms the third edge area;

the fourth non-display area is located between the sixth edge and the eighth edge, the sixth edge and the eighth edge form two opposite edges of the fourth non-display area, and the fourth non-display area forms the fourth edge area.

9. The display device according to any one of claims 1 to 8, wherein the first light emitter and the second light emitter are both infrared light emitters;

the first light receiver and the second light receiver are both infrared light receivers.

10. The display device according to any one of claims 1 to 9, wherein the display device comprises a face frame, the face frame comprising a first shielding portion and a second shielding portion;

the first shielding part is positioned on the side towards which the first edge area faces, and the second shielding part is positioned on the side towards which the second edge area faces;

the one of the first optical transmitter, the second optical transmitter, and the second optical receiver is disposed between the first shielding portion and the first edge region;

the other of the first light receiver, the second light emitter, and the second light receiver is disposed between the second shielding portion and the second edge region.

11. A display system comprising a stylus and a display device according to any one of claims 1 to 10;

the handwriting pen comprises a pen point, a pen body and a pen tail which are sequentially connected, wherein the pen point is different from one end of the pen body to the section width change rule far away from one end of the pen body, and the pen tail is different from one end of the pen body to the section width change rule far away from one end of the pen body.

12. The display system of claim 11, wherein the pen tip has a gradually decreasing cross-sectional width from an end connected to the pen body to an end away from the pen body;

the width of the section of the pen tail from one end connected with the pen body to the end far away from the pen body is not changed.

13. The display system of claim 12, wherein the tip is conical and the tail is cylindrical.

14. A control method of a display device is characterized in that the display device comprises a display screen, a first optical transmitter, a first optical receiver, a second optical transmitter and a second optical receiver;

the display screen comprises a display surface, wherein the display surface comprises a first edge area and a second edge area which are opposite;

the first optical transmitter is arranged on one side, facing the first edge area, the first optical receiver is arranged on one side, facing the second edge area, the first optical transmitter is provided with a first light outlet, the first optical receiver is provided with a first light receiving port, and the first light outlet is opposite to the first light receiving port;

one of the second optical transmitter and the second optical receiver is arranged on a side of the first optical transmitter opposite to the first edge region, and the other of the second optical transmitter and the second optical receiver is arranged on a side of the first optical receiver opposite to the second edge region, wherein the second optical transmitter has a second light outlet, the second optical receiver has a second light receiving port, and the second light receiving port is opposite to the second light outlet;

the control method comprises the following steps:

detecting first light intensity received by a first light receiving port of the first light receiver and second light intensity received by a second light receiving port of the second light receiver;

and outputting a control signal according to the first light intensity and the second light intensity.

15. The method according to claim 14, wherein outputting a control signal according to the first light intensity and the second light intensity comprises:

when the first light intensity is greater than the second light intensity and the difference between the first light intensity and the second light intensity is greater than or equal to a first preset threshold value, outputting a first control signal, wherein the first control signal is used for controlling and starting a first function of the display equipment;

and when the absolute value of the difference between the first light intensity and the second light intensity is smaller than or equal to a second preset threshold, outputting a second control signal, wherein the second control signal is used for controlling and starting a second function of the display equipment, the second function is different from the first function, and the second preset threshold is smaller than the first preset threshold.

16. The method according to claim 15, wherein the first function is a writing function.

17. The method according to claim 15 or 16, wherein the second function is an eraser function, a clear function, a color switching function, or a save function.

18. The method of controlling a display device according to any one of claims 14 to 17, wherein the display surface further includes third and fourth opposing edge regions, the third and fourth edge regions being located between the first and second edge regions;

the display device further comprises a third light emitter, a third light receiver, a fourth light emitter and a fourth light receiver; the third optical transmitter is arranged on the side, facing the third edge area, of the fourth edge area, the third optical receiver is arranged on the side, facing the fourth edge area, of the fourth edge area, the third optical transmitter is provided with a third light outlet, the third optical receiver is provided with a third light receiving port, and the third light outlet is opposite to the third light receiving port;

one of the fourth optical transmitter and the fourth optical receiver is arranged on a side of the third optical transmitter opposite to the third edge region, and the other of the fourth optical transmitter and the fourth optical receiver is arranged on a side of the third optical receiver opposite to the fourth edge region, where the fourth optical transmitter has a fourth light outlet, the fourth optical receiver has a fourth light receiving port, and the fourth light receiving port is opposite to the fourth light outlet;

the control method further comprises the following steps:

detecting third light intensity received by a third light receiving port of the third light receiver and fourth light intensity received by a fourth light receiving port of the fourth light receiver;

the outputting a control signal according to the first light intensity and the second light intensity includes:

and outputting a control signal according to the first light intensity, the second light intensity, the third light intensity and the fourth light intensity.

19. The method according to claim 18, wherein the outputting a control signal according to the first light intensity, the second light intensity, the third light intensity, and the fourth light intensity includes:

when the first light intensity is greater than the second light intensity, the third light intensity is greater than the fourth light intensity, and the difference between the first light intensity and the second light intensity and the difference between the third light intensity and the fourth light intensity are both greater than or equal to a first preset threshold value, outputting a first control signal, wherein the first control signal is used for controlling and starting a first function of the display equipment;

when the absolute value of the difference between the first light intensity and the second light intensity and the absolute value of the difference between the third light intensity and the fourth light intensity are smaller than or equal to a second preset threshold, outputting a second control signal, wherein the second control signal is used for controlling and starting a second function of the display device, the second function is different from the first function, and the second preset threshold is smaller than the first preset threshold.

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