CN101866246A - Multi-touch optical input device - Google Patents

Abstract

A multi-touch optical input device for forming a touch area on a physical plane, comprising: the first optical sensing module is provided with a first laser light source and a first image extraction device, the first laser light source generates first light, and the first image extraction device extracts first reflected light of the first light reflected by one or more index objects on the touch area; and the second optical sensing module is provided with a second laser light source and a second image extraction device, the second laser light source generates second light, and the second image extraction device extracts second reflected light of the second light reflected by one or more index objects on the touch area. The first optical sensing module and the second optical sensing module obtain optical information representing coordinate position information of one or more index objects through the first reflected light and the second reflected light. The invention can accurately sense the operation instruction of a user, has simplified structure and smaller volume, can reduce the cost and is applied to large size.

Description

Multi-touch optical input device

technical field

The invention relates to an input device, in particular to a multi-touch optical input device.

Background technique

In recent years, the touch screen has become a very important human-machine interface of consumer electronics products, and gradually replaces the functions of the keyboard and mouse, making the keyboard and mouse an accessory rather than a necessity. The evolution of touch screens, from the previous single-touch technology (single-touch) such as resistive and capacitive, to the current multi-touch technology (multi-touch) such as projected capacitive, optical and digital photography . Single-touch technology often only allows users to click buttons or simulate mouse functions, and cannot be diversified in terms of applications. Today's multi-touch technology can detect at least two points of contact at the same time, so as to achieve functions that were difficult to achieve in the previous single-touch technology, such as image rotation, zooming, etc. Single-touch panel and multi-touch panel can provide more interesting and convenient man-machine interface.

There are many types of touch screens, and each type of touch screen technology has its own advantages and disadvantages. At present, the single-touch screen technologies commonly used in electronic products can be roughly divided into: resistive, capacitive, surface acoustic wave, optical, and so on. The resistive touch screen can detect the XY axis coordinates by pressing the resistive film on the screen with any index object such as a finger or a pen to produce a change in resistance. Resistive touch screens have the advantages of cheap price, waterproof, good stain resistance and scratch resistance, but the disadvantages are poor light transmittance, insufficient accuracy and low service life. The surface capacitive touch screen cannot be operated with any pointing object, and must use a conductive pointing object, such as a human finger. When the human finger touches the surface of the panel, the human finger will absorb a small amount of current at this time, causing a change in the capacitance value, and the controller will calculate the XY axis coordinates based on the ratio of the current absorbed. The surface capacitive touch technology can respond to a slight touch, while the resistive touch technology requires a relatively large pressing force, so the surface capacitive touch technology has the advantage of being more sensitive. Optical touch technology utilizes the principle of blocking light source reception to form a matrix of light sources and receivers within the panel area. When the light is blocked, the position of the receiver that cannot receive the signal can be obtained, and then the XY axis coordinates can be determined. Optical touch technology has high light transmittance and can be operated with any index object and has the characteristics of long life.

At present, most applications are still based on single-point touch technology. The current multi-touch technology, such as Apple's iPhone, mostly uses capacitive methods to achieve multi-touch. However, multi-touch is currently relatively large. The problem lies in the huge size, high price and poor yield rate, so it is not conducive to large-scale design and application.

Therefore, how to develop a multi-touch input device that can improve the defects of the known technology is an urgent research and development issue.

Contents of the invention

The purpose of the present invention is to provide a multi-touch optical input device, which can selectively upgrade the screen or display panel without touch function to a multi-touch function according to the operating system of the electronic product. A screen or display panel with multi-touch function, or a man-machine interface that can directly provide multi-touch input on a physical plane, to replace traditional touch panels or input devices.

Another object of the present invention is to provide a multi-touch optical input device, which does not need a physical touch panel, only needs a physical plane, and regardless of the size or shape of the physical plane, the function of multi-touch input can be realized .

Another object of the present invention is to provide a multi-touch optical input device, which allows users to use fingers to open files, browse files, and directly input text by hand, while using fingers or multiple touch points to operate and flip , zoom in, zoom out and other actions. The multi-touch optical input device of the present invention can accurately sense the user's operation command, is less susceptible to external interference, reduces the probability of misjudgment, and has a simplified structure and small volume, which can reduce costs and be applied to large sizes.

In order to achieve the above purpose, a broader implementation of the present invention is to provide a multi-touch optical input device for forming a touch area on a solid plane, the multi-touch optical input device at least includes: A first optical sensing module has a first laser light source and a first image extraction device, the first laser light source generates a first light, and the first image extraction device extracts the first light through the touch area A first reflected light reflected by one or more index objects; and a second optical sensing module with a second laser light source and a second image extraction device, the second laser light source generates a second light, the first The second image extraction device extracts a second reflected light from the second light reflected by the one or more index objects on the touch area. Wherein, the first optical sensing module and the second optical sensing module obtain optical information representing coordinate position information of the one or more index objects through the first reflected light and the second reflected light.

The multi-touch optical input device of the present invention can accurately sense the user's operation command, is less susceptible to external interference, reduces the probability of misjudgment, and has a simplified structure and small volume, which can reduce costs and be applied to large sizes.

Description of drawings

FIG. 1A is a schematic structural diagram of a multi-touch optical input device according to a preferred embodiment of the present invention.

FIG. 1B is a schematic diagram of the side cross-sectional structure of FIG. 1A .

FIG. 2A : is a schematic diagram showing that a plurality of index objects are simultaneously input in the touch area of the multi-touch optical input device of the present invention.

FIG. 2B : obtaining optical information representing the coordinate positions of the plurality of index objects for the first optical sensing module and the second optical sensing module in FIG. 2A .

FIG. 3A is a schematic view showing another state where a plurality of index objects simultaneously input on the touch area of the multi-touch optical input device of the present invention.

FIG. 3B : obtaining optical information representing the coordinate positions of the plurality of index objects for the first optical sensing module and the second optical sensing module in FIG. 3A .

FIG. 4A is a schematic view showing another state where a plurality of index objects simultaneously input on the touch area of the multi-touch optical input device of the present invention.

FIG. 4B : obtaining optical information representing the coordinate positions of the plurality of index objects for the first optical sensing module and the second optical sensing module in FIG. 4A .

FIG. 5A is a schematic view showing another state where a plurality of index objects simultaneously input on the touch area of the multi-touch optical input device of the present invention.

FIG. 5B : obtaining optical information representing the coordinate positions of the plurality of index objects for the first optical sensing module and the second optical sensing module in FIG. 5A .

FIG. 6A is a schematic view showing another state where a plurality of index objects simultaneously input on the touch area of the multi-touch optical input device of the present invention.

FIG. 6B : obtaining optical information representing the coordinate positions of the plurality of index objects for the first optical sensing module and the second optical sensing module in FIG. 6A .

FIG. 7 : It shows a schematic structural diagram of a multi-touch optical input device according to another preferred embodiment of the present invention.

FIG. 8A and FIG. 8B : respectively show the schematic diagrams of the practical application of the multi-touch optical input device of the present invention.

The reference numerals in the above-mentioned accompanying drawings are explained as follows:

1 Multi-touch optical input device 10 Body

11 The first optical sensing module 12 The second optical sensing module

3 Touch Area 4 Indicator Object

101 side 102 opening

111 The first laser light source 112 The first image extraction device

113 First prism L1 First ray

R1 first reflected light 113a, 123a first surface

113b, 123b second surface 121 second laser light source

122 Second image extraction device 123 Second prism

L2 Second Ray R2 Second Reflected Light

C1 First start position C2 First end position

D1 Second starting position D2 Second end position

41 The first index object 42 The second index object

43 The third index object 44 The fourth index object

t1, t2, t3 Time 2 Display Panel

14 Bearing seat 15 Sliding mechanism

a43, a42, a41, a44, b41, b42, b43, b44 waves

Detailed ways

Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention is capable of various changes in different ways without departing from the scope of the present invention, and that the description and drawings therein are illustrative in nature and not intended to limit the present invention. invention.

FIG. 1A is a schematic structural diagram of a multi-touch optical input device according to a preferred embodiment of the present invention, and FIG. 1B is a schematic diagram of a side cross-sectional structure of FIG. 1A . As shown in FIG. 1A and FIG. 1B , the multi-touch optical input device 1 of the present invention includes a main body 10 , a first optical sensing module 11 and a second optical sensing module 12 . Wherein, the first optical sensing module 11 and the second optical sensing module 12 are disposed in the main body 10 and form a touch area 3 on a physical plane 2 to obtain optical information representing the coordinate position of the index object 4 . In this embodiment, the body 10 is a casing, and at least one side 101 of the body 10 has an opening 102 . In this embodiment, the indicator object 4 can be a human finger or a pen, and is not limited thereto. In some embodiments, the physical plane 2 can be a desktop or a display area of a display panel without a touch function, and is not limited thereto.

In this embodiment, the first optical sensing module 11 includes a first laser light source 111, a first image capture device 112, and a first prism (prism) 113, wherein the first laser light source 111 has high directivity and can reflect Get a better light spot. The first laser light source 111 casts a uniform light on the touch area 3 by, for example, scanning or guiding light, wherein the first light L1 projected by the first laser light source 111 can be invisible light, such as infrared light, but not in the form of This is the limit. The first image capturing device 112 can be, for example, a light sensor, a camera, or a linear image sensor (linear image sensor), for receiving the first reflected light R1 reflected by the first light L1 from the index object 4, to detect the first reflected light R1 The relative coordinate position of the index object 4 is used, and the received optical information is converted into an electronic signal and input to a controller (not shown) of an electronic product to achieve a multi-touch function. The first prism 113 is arranged on the path of the first light L1 projected by the first laser light source 111, and is structured to allow the first light L1 to pass through and receive the first reflected light R1, and pass the first reflected light R1 once. The total reflection guides the first image capture device 112 so that the first image capture device 112 can obtain optical information representing the relative coordinate position of the index object 4 . The first laser light source 111 is adjacent to and faces the first surface 113 a of the first prism 113 , so that the first light L1 can pass through the first prism 113 through the first surface 113 a. The first image capturing device 112 is adjacent to and facing the second surface 113b of the first prism 113 , so that the first reflected light R1 can be guided to the first image capturing device 112 through a total reflection of the second surface 113b.

In this embodiment, the second optical sensing module 12 includes a second laser light source 121, a second image capture device 122, and a second prism (prism) 123, wherein the second laser light source 121 has high directivity and can reflect Get a better light spot. The second laser light source 121 casts a uniform light on the touch area 3 by, for example, scanning or guiding light, wherein the second light L2 projected by the second laser light source 121 can be invisible light, such as infrared light, but not in the form of This is the limit. In this embodiment, the second light L2 projected by the second laser light source 121 and the first light L1 projected by the first laser light source 111 have different wavelengths. The second image capturing device 122 can be, for example, a light sensor, a camera, or a linear image sensor (linear image sensor), for receiving the second reflected light R2 of the second light L2 reflected by the index object 4, to detect the second light L2 The relative coordinate position of the index object 4 is used, and the received optical information is converted into an electronic signal and input to a controller (not shown) of an electronic product to achieve a multi-touch function. The second prism 123 is arranged on the path of the second light L2 projected by the second laser light source 121, and is structured to allow the second light L2 to pass through and receive the second reflected light R2, and pass the second reflected light R2 once. The total reflection guides the second image capture device 122 so that the second image capture device 122 can obtain optical information representing the relative coordinate position of the index object 4 . The second laser light source 121 is adjacent to and faces the first surface 123 a of the second prism 123 , so that the second light L2 can pass through the second prism 123 through the first surface 123 a. The second image capture device 122 is adjacent to and faces the second surface 123 b of the second prism 123 , so that the second reflected light R2 can be guided to the second image capture device 122 through a total reflection of the second surface 123 b.

In some embodiments, the first optical sensing module 11 and the second optical sensing module 12 are disposed at two opposite ends of the body 10, so that the first light L1 projected by the first laser light source and the second laser light source and the second light beam L1 The angle between the two rays L2 is substantially perpendicular. In some embodiments, the first laser light source 111 , the first image capture device 112 and the first prism 113 can be configured in a modular form or be detachably disposed in the body 10 . In some embodiments, the second laser light source 121 , the second image capture device 122 and the second prism 123 can be constructed in a modular form or be detachably disposed in the body 10 .

In this embodiment, the first optical sensing module 11 and the second optical sensing module 12 can use the first image capture device 112 and the second image capture device 122 to obtain optical information representing the target object 4, such as phase difference and reflection The light intensity can be used to locate the X-axis and Y-axis coordinate position information of the index object 4 . FIG. 2A shows a schematic diagram of a plurality of index objects simultaneously inputting in the touch area of the multi-touch optical input device of the present invention, and FIG. 2B shows the first optical sensing module and the second optical sensing module in FIG. 2A respectively. Obtain optical information representing the coordinate positions of the plurality of index objects. As shown in FIG. 1A, FIG. 1B, FIG. 2A and FIG. 2B, the first laser light source 111 of the first optical sensing module 11 is scanned from the first starting position C1 to the first end position C2, for example, from 0 degrees to 90 degrees. degree angle. At the same time, the second laser light source 121 of the second optical sensing module 12 will also scan from the second initial position D1 to the second end position D2. In this embodiment, the first end position C2 and the second starting position D1 are on the same marking line. The first light L1 emitted by the first laser light source 111 of the first optical sensing module 11 will quickly scan from the first initial position C1 to the first end position C2. When scanning to the first index object 41, the second index object 42, and the third index object 43, the first image extraction device 112 will scan from the third index object 43, the second index object at different scanning times t1, t2, and t3 respectively. 42 and the first index object 41 receive the first reflected light R1 with different or the same intensity, for example, waves a43, a42, and a41 with the same intensity or different intensities are respectively obtained at time t1, t2, and t3, wherein the second index object 42 The closer the distance, the stronger the intensity of the reflected light. At the same time, the second light L2 emitted by the second laser light source 121 of the second optical sensing module 12 will quickly scan from the second start position D1 to the second end position D2. When scanning to the first index object 41, the second index object 42 and the third index object 43, because the second index object 42 and the third index object 43 are located behind the first index object 41 relative to the second laser light source 121 , so the second image capture device 122 can only receive the second reflected light R2 from the first target object 41 at the scanning time t2, for example, obtain the wave b41 with a specific intensity at the time t2. Therefore, the first optical sensing module 11 can make up for the misdetection that may be caused by sensing only by a second optical sensing module 12 (for example, the second index object 42 and the third index object 43 are replaced by the first index object 41 shielding, so that its optical information cannot be measured only by the second optical sensing module 12), so the first optical sensing module 11 and the second optical sensing module 12 can cooperate with each other, thereby effectively sensing multiple Optical information such as the number of index objects, reflected light intensity, and scanning time are transmitted to the controller of an electronic product for calculation to obtain coordinate position information of multiple index objects for easy control.

FIG. 3A is a schematic diagram showing another state where a plurality of index objects are simultaneously input in the touch area of the multi-touch optical input device of the present invention, and FIG. 3B is a diagram of the first optical sensing module and the second optical sensing module in FIG. 3A The sensing module respectively obtains optical information representing the coordinate positions of the plurality of index objects. As shown in FIG. 1A, FIG. 1B, FIG. 3A and FIG. 3B, the first laser light source 111 of the first optical sensing module 11 is scanned from the first starting position C1 to the first end position C2, for example, from 0 degrees to 90 degrees. degree angle. At the same time, the second laser light source 121 of the second optical sensing module 12 will also scan from the second initial position D1 to the second end position D2. In this embodiment, the first end position C2 and the second starting position D1 are on the same marking line. The first light L1 emitted by the first laser light source 111 of the first optical sensing module 11 will quickly scan from the first initial position C1 to the first end position C2. When scanning to the first index object 41, the second index object 42 and the third index object 43, because the second index object 42 and the third index object 43 are located behind the first index object 41 relative to the first laser light source 111, Therefore, the first image capture device 112 can only receive the first reflected light R1 from the first target object 41 at the scanning time t2, for example, obtain the wave a41 with a specific intensity at the time t2. At the same time, the second light L2 emitted by the second laser light source 121 of the second optical sensing module 12 will quickly scan from the second start position D1 to the second end position D2. When scanning to the first index object 41, the second index object 42 and the third index object 43, the second image extraction device 122 will scan from the first index object 41, the second index object 41 and the second index object at different scanning times t1, t2, and t3 respectively 42 and the third index object 43 receive the second reflected light R2 of different or the same intensity, for example, waves b41, b42, and b43 with the same intensity or different intensities are respectively obtained at time t1, t2, and t3, wherein the second index object 42 The closer the distance, the stronger the intensity of the reflected light. Therefore, the second optical sensing module 12 can make up for the misdetection that may be caused by only one first optical sensing module 11 sensing (for example, the second index object 42 and the third index object 43 are replaced by the first index object 41 shielding, so that its optical information cannot be measured only by the first optical sensing module 11), so the first optical sensing module 11 and the second optical sensing module 12 can cooperate with each other, thereby effectively sensing multiple Optical information such as the number of index objects, reflected light intensity, and scanning time are transmitted to the controller of an electronic product for calculation to obtain coordinate position information of multiple index objects for easy control.

FIG. 4A is a schematic diagram showing another state where a plurality of index objects are simultaneously input in the touch area of the multi-touch optical input device of the present invention, and FIG. 4B is a first optical sensing module and a second optical sensing module in FIG. 4A The sensing module respectively obtains optical information representing the coordinate positions of the plurality of index objects. As shown in Figure 1A, Figure 1B, Figure 4A and Figure 4B, the first laser light source 111 of the first optical sensing module 11 is scanned from the first starting position C1 to the first end position C2, for example, scanning from 0 degrees to 90 degrees degree angle. At the same time, the second laser light source 121 of the second optical sensing module 12 will also scan from the second initial position D1 to the second end position D2. In this embodiment, the first end position C2 and the second starting position D1 are on the same marking line. The first light L1 emitted by the first laser light source 111 of the first optical sensing module 11 will quickly scan from the first initial position C1 to the first end position C2. When scanning to the first index object 41, the second index object 42 and the third index object 43, the first image extraction device 112 will scan from the first index object 41, the second index object 41 and the second index object at different scanning times t1, t2, and t3 respectively 42 and the third index object 43 receive the first reflected light R1 with different intensities, for example, waves a41, a42, and a43 with different intensities are respectively obtained at time t1, t2, and t3, wherein the first index object 41, the second index object The distance between 42 and the third index object 43 increases sequentially, and the intensity of the reflected light decreases sequentially. At the same time, the second light L2 emitted by the second laser light source 121 of the second optical sensing module 12 will quickly scan from the second start position D1 to the second end position D2. When scanning to the first index object 41, the second index object 42 and the third index object 43, the second image extraction device 122 will scan from the first index object 41, the second index object 41 and the second index object at different scanning times t1, t2, and t3 respectively 42 and the third index object 43 receive the second reflected light R2 with different intensities, for example, waves b41, b42, and b43 with different intensities are respectively obtained at time t1, t2, and t3, wherein the first index object 41 and the second index object The distance between 42 and the third index object 43 decreases gradually, and the intensity of the reflected light increases sequentially. Therefore, the first optical sensing module 11 and the second optical sensing module 12 can cooperate with each other, thereby effectively sensing optical information such as the number of multiple index objects, the intensity of reflected light, and the time of scanning, and then the optical information The information is sent to the controller of an electronic product for calculation to obtain the coordinate position information of multiple index objects to facilitate control.

FIG. 5A is a schematic diagram showing another state where a plurality of index objects are simultaneously input in the touch area of the multi-touch optical input device of the present invention, and FIG. 5B is a schematic view of the first optical sensing module and the second optical sensing module in FIG. 5A The sensing module respectively obtains optical information representing the coordinate positions of the plurality of index objects. As shown in Figure 1A, Figure 1B, Figure 5A and Figure 5B, the first laser light source 111 of the first optical sensing module 11 is scanned from the first starting position C1 to the first end position C2, for example, from 0 degrees to 90 degrees degree angle. At the same time, the second laser light source 121 of the second optical sensing module 12 will also scan from the second initial position D1 to the second end position D2. In this embodiment, the first end position C2 and the second starting position D1 are on the same marking line. The first light L1 emitted by the first laser light source 111 of the first optical sensing module 11 will quickly scan from the first initial position C1 to the first end position C2. When scanning to the first index object 41, the second index object 42, and the third index object 43, the first image extraction device 112 will scan from the third index object 43, the second index object at different scanning times t1, t2, and t3 respectively. 42 and the first index object 41 receive the first reflected light R1 with different intensities, for example, waves a43, a42, and a41 with different intensities are respectively obtained at time t1, t2, and t3, wherein the third index object 43, the second index object The distance between 42 and the first index object 41 decreases gradually, and the intensity of the reflected light increases sequentially. At the same time, the second light L2 emitted by the second laser light source 121 of the second optical sensing module 12 will quickly scan from the second start position D1 to the second end position D2. When scanning to the first index object 41, the second index object 42 and the third index object 43, the second image extraction device 122 will scan from the first index object 41, the second index object 41 and the second index object at different scanning times t1, t2, and t3 respectively 42 and the third index object 43 receive the second reflected light R2 with different intensities, for example, waves b41, b42, and b43 with different intensities are respectively obtained at time t1, t2, and t3, wherein the first index object 41 and the second index object The distance between 42 and the third index object 43 increases sequentially, and the intensity of the reflected light decreases sequentially. Therefore, the first optical sensing module 11 and the second optical sensing module 12 can cooperate with each other, thereby effectively sensing optical information such as the number of multiple index objects, the intensity of reflected light, and the time of scanning, and then the optical information The information is sent to the controller of an electronic product for calculation to obtain the coordinate position information of multiple index objects to facilitate control.

FIG. 6A is a schematic diagram showing another state where a plurality of index objects are simultaneously input in the touch area of the multi-touch optical input device of the present invention, and FIG. 6B is a diagram of the first optical sensing module and the second optical sensing module in FIG. 6A The sensing module respectively obtains optical information representing the coordinate positions of the plurality of index objects. As shown in Figure 1A, Figure 1B, Figure 6A and Figure 6B, the first laser light source 111 of the first optical sensing module 11 is scanned from the first starting position C1 to the first end position C2, for example, from 0 degrees to 90 degrees degree angle. At the same time, the second laser light source 121 of the second optical sensing module 12 will also scan from the second initial position D1 to the second end position D2. In this embodiment, the first end position C2 and the second starting position D1 are on the same marking line. The first light L1 emitted by the first laser light source 111 of the first optical sensing module 11 will quickly scan from the first initial position C1 to the first end position C2. When scanning to the first index object 41, the second index object 42, the third index object 43 and the fourth index object 44, because the third index object 43 is covered by the second index object 42, the first image extraction device 112 will The first reflected light R1 of different or the same intensity is received from the first index object 41, the second index object 42, and the fourth index object 44 at different scanning times t1, t2, and t3, for example, at time t1, t2, and t3 respectively Obtain waves a41 , a42 , a44 with different or the same intensity, wherein the second index object 42 is closer and the intensity of reflected light is stronger. At the same time, the second light L2 emitted by the second laser light source 121 of the second optical sensing module 12 will quickly scan from the second start position D1 to the second end position D2. When scanning to the second index object 42, the fourth index object 44 and the third index object 43, because the first index object 41 is covered by the fourth index object 44, the second image extraction device 122 will scan at different scanning times t1, At t2 and t3, the second reflected light R2 with different or the same intensity is received from the second index object 42, the fourth index object 44, and the third index object 43, respectively. The waves b42, b44, and b43 of the fourth index object 44 are relatively close, and the intensity of the reflected light is relatively strong. Therefore, the first optical sensing module 11 and the second optical sensing module 12 can cooperate with each other, thereby effectively sensing optical information such as the number of multiple index objects, the intensity of reflected light, and the time of scanning, and then the optical information The information is sent to the controller of an electronic product for calculation to obtain the coordinate position information of multiple index objects to facilitate control.

The multi-touch optical input device 1 of the present invention can transmit the optical information to the controller of an electronic product for calculation to convert the optical information into coordinate position information for easy control. According to the idea of the present invention, the controller can calculate the received optical information in a manner similar to the definition of a triangle, so as to use the obtained optical information, such as the number of reflection points, phase difference and reflected light intensity, to calculate and locate the coordinates of the XY axis location information.

Please refer to FIG. 7 , which shows a schematic structural diagram of a multi-touch optical input device according to another preferred embodiment of the present invention. In this embodiment, the main structure and function of the multi-touch optical input device are similar to those shown in FIG. 1A and FIG. The body needs to be used, so the size and cost can be further reduced. The multi-touch optical input device of the present invention includes a first optical sensing module 11, a second optical sensing module 12 and a bearing base 14, wherein the bearing base 14 has a sliding mechanism 15 on one surface, the first optical sensing module The optical sensing module 11 and/or the second optical sensing module 12 can be arranged on the sliding mechanism 15, thereby the relative distance between the first optical sensing module 11 and the second optical sensing module 12 can be adjusted to elastically The size of the touch area of the multi-touch optical input device can be adjusted, for example, from 20 inches to 42 inches, so as to increase its application breadth and flexibility.

In this embodiment, after obtaining the optical information of the index object and calculating it into coordinate position information by the controller, the controller can further continue to judge whether it has detected whether the index object is pressed, whether the relative distance between multiple index objects is Change, whether the pointer leaves the touch area, etc., so as to cooperate with the actions of multiple pointers, such as zooming in on the image, zooming out, rotating the image, moving the image, etc. Functions can be performed.

Please refer to FIG. 8A and FIG. 8B , which respectively show a schematic diagram of the practical application of the multi-touch optical input device of the present invention. The multi-touch optical input device 1 of the present invention is detachably assembled on a display panel 2 that only has a display function, so that the display panel 2 that generally does not have a touch input function can be upgraded to a multi-point touch input device. Touch-enabled display panel. Of course, the multi-touch optical input device 1 of the present invention can also be directly disposed in the body of the display panel 2 . In other embodiments, the multi-touch optical input device 1 of the present invention can also directly form a touch area on a physical plane without being built in the display area of the display panel, so it can be applied to any size and has Apply elasticity.

In summary, the present invention provides a multi-touch optical input device, which can not only be applied to portable information, communication or network devices, education, entertainment, display and other electronic product applications, but also can replace single-touch screens, It can also provide a more humanized and interesting man-machine operation interface, and even achieve actions that were difficult to achieve with single-touch or mouse, such as multiple people operating on a physical plane at the same time, or by game manufacturers using this Technology to develop a game that is different from the past. The multi-touch optical input device of the present invention can selectively upgrade all screens that currently do not have a touch function to those with a multi-touch function when the operating system of an electronic product is upgraded to a multi-touch application. screen, or a man-machine interface that provides multi-touch input directly on a physical plane to replace traditional touch panels or input devices. The multi-touch optical input device of the present invention does not need a physical touch panel, but only needs a physical plane, regardless of the size or shape of the physical plane, to realize the function of multi-touch input. In addition, the multi-touch optical input device of the present invention can accurately sense the user's operation instructions, is less susceptible to external interference, reduces the probability of misjudgment, and has a simplified structure and small volume, which can reduce costs and be applied to large size.

The present invention can be modified in various ways by those skilled in the art without departing from the protection scope of the appended claims.

Claims (14)

1. A multi-touch optical input device for forming a touch area on a solid plane, the multi-touch optical input device at least comprising: A first optical sensing module has a first laser light source and a first image extraction device, the first laser light source generates a first light, and the first image extraction device extracts the first light through the touch area a first reflected light reflected by one or more index objects; and A second optical sensing module has a second laser light source and a second image capture device, the second laser light source generates a second light, and the second image capture device extracts the second light through the touch area a second reflected light reflected by the one or more indicator objects; Wherein, the first optical sensing module and the second optical sensing module obtain optical information representing coordinate position information of the one or more index objects through the first reflected light and the second reflected light. 2. The multi-touch optical input device according to claim 1, further comprising a body, and the first optical sensing module and the second optical sensing module are disposed inside the body. 3. The multi-touch optical input device as claimed in claim 2, wherein at least one side of the main body has an opening. 4. The multi-touch optical input device as claimed in claim 2, wherein the first optical sensing module and the second optical sensing module are disposed at two ends of the body. 5. The multi-touch optical input device as claimed in claim 1, wherein the first light and the second light generated by the first laser light source and the second laser light source have different wavelengths. 6. The multi-touch optical input device as claimed in claim 1, wherein the first image capture device and the second image capture device are light sensors, camera devices or linear image sensors. 7. The multi-touch optical input device according to claim 1, wherein the first optical sensing module further comprises a first prism disposed on the path of the first light projected by the first laser light source , and the structure is to allow the first light to penetrate and receive the first reflected light, and guide the first reflected light to the first image capturing device through a total reflection. 8. The multi-touch optical input device according to claim 1, wherein the second optical sensing module further comprises a second prism disposed on the path of the second light projected by the second laser light source , and the structure is to allow the second light to penetrate and receive the second reflected light, and guide the second reflected light to the second image capturing device through a total reflection. 9. The multi-touch optical input device as claimed in claim 1, wherein an included angle between the first light beam projected by the first laser light source and the second light beam projected by the second laser light source is perpendicular. 10. The multi-touch optical input device according to claim 1, further comprising a bearing base, the bearing base has a sliding mechanism on a surface, the first optical sensing module and/or the second optical sensing module The sensing module is disposed on the sliding mechanism for adjusting the relative distance between the first optical sensing module and the second optical sensing module. 11. The multi-touch optical input device as claimed in claim 1, wherein the first laser light source projects the first light on the touch area in a scanning or guiding manner, and the second laser light source scans or The light guiding method projects the second light on the touch area. 12. The multi-touch optical input device as claimed in claim 1, wherein the physical plane is a display panel. 13. The multi-touch optical input device as claimed in claim 1, wherein the multi-touch optical input device is detachably assembled on an electronic product. 14. The multi-touch optical input device as claimed in claim 1, wherein the multi-touch optical input device is disposed in an electronic product.

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