WO2016008249A1 - Touch screen and display apparatus - Google Patents

Abstract

A touch screen and a display apparatus. The touch screen comprises a display substrate (10) and a touch electrode (1), the touch electrode (1) being formed by adopting an electrode material comprising a photosensitive substance and the touch electrode (1) being controlled by a light source control unit (20) to implement the location and operation of a touch point, the light source control unit (20) being in indirect physical contact with the touch screen (6) and having a light source (2) adapted to the photosensitive substance. The touch screen can implement a remote operation similar to the direct contact of fingers on the touch screen, thereby being convenient and flexible and enlarging the application range of the touch screen.

Description

Touch screen and display device Technical field

Embodiments of the present invention relate to a touch screen and a display device.

Background technique

The touch screen enables close-up operation of display devices (mobile phones, tablets, laptops, etc.). The touch screen usually uses a metal oxide electrode material such as Indium Tin Oxide (ITO) or a metal electrode material to form a touch electrode, which causes a change in the resistance value or capacitance value of the touched point in the touch screen when the touch screen is touched by a human hand. Implement touch functionality. However, at present, the long-distance operability of a display device that requires remote operation such as a television or an electronic blackboard is still poor.

In the case of e-learning or exhibition presentations, a laser pen can be used as a means of remote indication. A laser with a wavelength of about 600 nm is usually used as an indicator beam, which can be used as an indicator instead of a pointer, or as an instruction when playing PPT. use. Of course, some advanced laser pens also have the function of multimedia remote control, such as page turning of PPT, EXC, WORD and other documents (equivalent to Page Up and Page Down keys in the computer keyboard), which is convenient for multimedia presentations. Usually, the laser pointer includes an RF remote controller and a receiver. The laser pointer can be used as a remote indication, which is equivalent to an operation button, but the remote control file will not be modified, and the menu command of a specific position of the file will not be executed or operated. . Therefore, the operation of the laser pointer is not a true touch.

Summary of the invention

Embodiments of the present invention provide a touch screen and a display device, which is a touch screen that can be operated at a remote distance, which can realize a long-distance operation like a finger directly contacting the touch screen, and extends the application range of the touch screen.

At least one embodiment of the present invention provides a touch screen including a display substrate and a touch electrode, wherein the touch electrode is formed using an electrode material containing a photosensitive material, and the touch electrode is configured to be controlled by a light source control unit. Touch point positioning and operation are achieved, the light source control unit being in non-direct physical contact with the touch screen and having a light source adapted to the photosensitive substance.

For example, the photosensitive material may be an infrared photosensitive material, and the light source control unit includes at least one infrared laser pen or an invisible light device capable of functioning as an infrared touch.

For example, the photosensitive material may include at least one of lead sulfide, lead telluride, lead selenide, and amorphous silicon.

For example, the light source in the light source control unit is small in size and concentrated, and the spot size projected onto the touch screen is within the resolution of the touch screen.

For example, the touch electrode may be a resistive touch electrode, and the touch electrode may be in a plate shape; and an infrared light source in a certain wavelength range emitted by the light source control unit is irradiated onto the touch electrode, thereby causing The resistance value of the touch electrode varies, wherein the wavelength of the infrared light source emitted by the light source control unit ranges from 1000 to 1500 nm.

For example, the touch electrode may be a capacitive touch electrode, and the touch electrode may include a strip-shaped emitter electrode and a strip-shaped receiving electrode disposed at an intersection, and the emitter electrode and the receiving electrode may be disposed a transparent insulating isolation layer; the light source in a certain wavelength range emitted by the light source control unit is irradiated onto the touch electrode, thereby causing a change in the capacitance value of the touch electrode, wherein the light source control unit sends out The infrared source has a wavelength in the range of 1000-1500 nm.

For example, the touch screen may further include a detection IC connected to the detection IC through a trace electrode, and the trace electrode is formed of a metal material.

For example, the light source control unit can be wearable, and the light source control unit can include a plurality of discrete light sources.

For example, the touch electrode can be disposed inside or on the surface of the touch screen.

For example, the touch electrodes may be disposed on the display substrate by using an external connection such as GG, OGS, or GFF, or may be disposed on the display substrate by using a built-in manner such as In-Cell or On-Cell.

For example, the touch screen can employ a rigid display substrate or a flexible display substrate.

For example, the electrode material may include a metal oxide electrode material or a metal electrode material, and the metal oxide electrode material may include any one or a combination of indium zinc oxide, indium tin oxide, indium oxide, or zinc oxide; The metal electrode material may include any one of Cr, W, Ti, Ta, Mo, AlNd, Cu, Ag, Al, or an alloy of any of the above metals.

Embodiments of the present invention also provide a display device including any of the touch screens described above.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention. Rather than limiting the invention.

1 is a schematic structural view of a touch electrode according to Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the principle of the touch electrode of FIG. 1 for implementing remote touch;

3(a) and 3(b) are schematic structural views of a touch electrode according to Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram showing the principle of implementing remote touch by the touch electrode of FIG. 2; FIG.

5 is a schematic structural diagram of a touch screen including a detection IC according to Embodiment 2 of the present invention;

6 is a schematic structural view of a touch electrode provided with a transparent insulating isolation layer between a transmitting electrode and a receiving electrode according to Embodiment 2 of the present invention; and a touch screen using the touch electrode;

FIG. 7 is a schematic diagram of remote touch according to Embodiment 1 of the present invention.

Reference mark:

1-touch electrode; Tx-transmitting electrode; Rx-receiving electrode; 2-light source; 3-insulating isolation layer; 5-detection IC; 6-touch screen; 10-display substrate; 20-light source control unit; 51-wiring electrode.

detailed description

To make the technical solutions of the present invention better understood by those skilled in the art, the touch screen and the display device of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It is apparent that the described embodiments are part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.

Example 1

The touch panel includes a display substrate 10 and a touch electrode 1 , wherein the touch electrode 1 is formed by using an electrode material containing a photosensitive material, and the touch electrode 1 is controlled by the light source control unit 20 to realize touch point positioning and Operation, the light source control unit 20 is in non-direct physical contact with the touch screen 6 and has a light source 2 adapted to the photosensitive material, as shown in FIGS. 2 and 7.

In this embodiment, the “indirect physical contact” means that the touch point position touch of the touch screen is not caused by direct contact between the human body or a touch pen or the like, but is caused by a light sensing reaction. Caused by changes in properties (such as changes in resistance or capacitance). After the position of the touch point is detected, the menu command operation mode of the subsequent touch point position is the same as the menu command operation mode of the touch point position of the touch screen directly contacting the human body or the touch pen.

For example, in this embodiment, the electrode material may include a metal oxide electrode material or a metal electrode material, and the metal oxide material may include Indium Zinc Oxide (IZO) and Indium Tin (Indium Tin). Any one or a combination of Oxide (ITO), indium oxide (In ₂ O ₃ ) or zinc oxide (ZnO); the metal electrode material may include Cr, W, Ti, Ta, Mo, AlNd, Cu, Any of Ag, Al or an alloy of any of the above various metals.

As an example, the photosensitive material may be an infrared photosensitive material, for example, the photosensitive material may include at least one of lead sulfide, lead telluride, lead selenide, and amorphous silicon. Accordingly, the light source control unit may include at least one infrared laser pointer or an invisible light device capable of functioning as an infrared touch.

The touch screen in this embodiment can realize single-point or multi-point simultaneous operation. The light source control unit emits a single light source for single-touch, and the light source control unit emits multiple light sources for multi-touch. That is, the touch screen in this embodiment may be equipped with one or more light source pens, such as an infrared light source pen, as needed, and the light source is illuminated by the light source to achieve an effect similar to a finger touch. For example, the light source in the light source control unit is small in size and concentrated, and the spot size projected onto the touch screen is within the resolution of the touch screen (for example, the Win8 system requires 1 mm). Since the light source has a concentrating function, its beam can be adjusted such that the spot size on the touch screen is comparable to that of the finger (e.g., about 5 mm in diameter). However, the light spot should not be too small, otherwise it may exceed the resolution of the touch screen and the touch cannot be recognized.

For example, in this embodiment, the touch electrode can be a resistive touch electrode, and the touch electrode can be a plate shape; the infrared light source in a certain wavelength range emitted by the light source control unit is irradiated onto the touch electrode, thereby causing touch The resistance value of the electrode changes. The infrared light source emitted by the light source control unit may have a wavelength ranging from 1000 to 1500 nm. Since the infrared light source is used in the wavelength range of 1000-1500 nm, the influence of ambient visible light can be eliminated, and the effectiveness of the touch can be improved.

The touch screen further includes a detection IC, and the touch electrode and the detection IC are connected by a trace electrode, and the trace electrode is formed of a metal material. The touch electrodes in this embodiment may be formed by using an electrode material containing an infrared photosensitive material, and the peripheral trace electrodes are still formed by a conventional metal. This arrangement can reduce the trace resistance and improve the sensitivity of the touch.

For example, in the present embodiment, as shown in FIG. 1, the resistive touch electrode 1 may have a plate shape, and may have various shapes such as a square shape and a rhombus shape as needed. As shown in FIG. 2, when the infrared light source of a specific wavelength is irradiated to a certain point of the touch electrode 1, the resistance value of the touch electrode 1 at the corresponding point is changed. In general, a touch electrode formed of an electrode material or a metal material containing an infrared photosensitive material can have a resistance of several megaohms. After being irradiated by an infrared light source, the photosensitive substance can induce or excite the light sensitivity It should be such that the resistance of the touch electrode of the irradiated portion is drastically changed to several ohms in a very short time (microsecond order). Therefore, it can fully satisfy the amount of change (European level, millisecond level) required for the general detection IC to perform detection. Further, the touch operation is realized according to the change in the resistance value, and the detection of the touch point (here, the illuminated point) can be realized by the detection method of the usual physical contact type resistive touch screen. For example, when the touch electrode 1 covers the entire display area, the detection of the touch point can be realized by using a detection method of a usual four-wire resistive touch screen or a five-wire resistive touch screen.

It can be easily understood that the touch electrode 1 in the touch screen of the embodiment can be disposed inside or on the surface of the touch screen. In this way, when an infrared laser pointer or a similar invisible light source device is used to illuminate the surface of the touch screen for a long distance, the photosensitive material can be irradiated with light to change the resistance value of the touch electrode, thereby facilitating positioning and operation, and realizing touch. Features. Moreover, according to the operator's operation distance from the display device such as a television or an electronic blackboard, a remote operation in which a finger directly contacts the touch screen within 10 meters can be realized.

With the development of science and technology, wearable technology has emerged. In accordance with the trend, the light source control unit in this embodiment may be set to wearable, and the light source control unit may include a plurality of dispersed light sources. For example, a glove-like manner can be used to form the light source control unit in the form of a finger sleeve, one for each finger. When worn directly on the finger, the ten-finger operation can be realized, which is equivalent to the extended finger, so that the experience of directly contacting the touch screen with the finger is obtained.

For example, the touch electrode 1 is provided on the display substrate by using an external touch screen such as GG (Glass-Glass), OGS (One-Glass-Solution), GFF (Glass-Film-Film), or the like. -Cell (the touch screen is located inside the LCD panel) and On-Cell (the touch screen is located on the surface of the LCD panel) are provided on the display substrate by a built-in touch panel. For example, the touch screen can employ a rigid display substrate (eg, glass, sapphire, etc.) or a flexible display substrate (eg, PET, etc.).

In this embodiment, the display substrate may be any product or component having a display function such as a liquid crystal panel, an OLED panel, a plasma display panel, or the like.

In the touch screen of the embodiment, the touch electrode is formed by using the electrode material containing the photosensitive material, and the long-distance operation like the direct contact of the finger with the touch screen is realized, which is convenient and flexible, and extends the application range of the touch screen.

Example 2

The present embodiment provides a touch screen. The difference between the display screen and the touch screen of the first embodiment is that the touch electrodes are capacitive touch electrodes instead of resistive touch electrodes. That is, in this embodiment, the light source is controlled The light source of the unit is irradiated on the touch screen, so that the capacitance value of the touch electrode is changed, and the touch point positioning and operation are realized.

For example, FIG. 3(a) and FIG. 4 show that the touch electrode may include a strip-shaped emitter electrode Tx and a strip-shaped receiving electrode Rx which are disposed at intersections, and in this embodiment, the emitter electrode Tx and the receiving electrode Rx are located at different layers. on. A transparent insulating spacer 3 is disposed between the emitter electrode Tx and the receiving electrode Rx as shown in FIG. 6 (which corresponds to a cross-sectional view taken along line A-A in FIG. 5). The infrared light source in a certain wavelength range that can be emitted by the light source control unit is irradiated onto the touch electrode, and the capacitance value of the touch electrode is changed. The wavelength of the infrared light source emitted by the light source control unit may be 1000-1500 nm.

The touch principle of the capacitive touch electrode in the embodiment is the same as that of the resistive touch electrode in the first embodiment.

As shown in FIG. 3( a ), the touch electrode 1 is divided into two layers: a transmitting electrode Tx and a receiving electrode Rx. The transmitting electrode Tx and the receiving electrode Rx respectively correspond to the X direction and the Y direction, and are composed of several sub-electrodes, each of which is composed of The electrode width can vary depending on the touch screen sensing accuracy. The principle of implementing the touch operation in Embodiment 1 is the same. As shown in FIG. 4, when an infrared light source of a specific wavelength is irradiated to a certain point of the touch electrode 1, the photosensitive material can induce or excite a photoreaction, so that the capacitance of the sub-electrode as the emitter electrode Tx and the receiving electrode Rx at the corresponding position is obtained. The value will change. By detecting the IC for progressive scanning, the position of the sub-electrode whose capacitance value changes can be detected, that is, the position coordinates and operations corresponding to the touch point can be recognized, and the touch function can be realized.

For example, FIG. 5 shows that the detection IC 5 may be further included in the touch screen, and the touch electrode and the detection IC are connected by the trace electrode 51, and the trace electrode 51 is formed of a metal material.

In a variation of this embodiment, as shown in Fig. 3(b), the transmitting electrode Tx and the receiving electrode Rx are disposed on the same layer, one of which is formed in segments and the other in continuous formation. For example, the transmitting electrode Tx is continuously formed, and the receiving electrode Rx is formed in segments, and at the intersection of the transmitting electrode Tx and the receiving electrode Rx, the sub-electrode units of the segment-formed receiving electrode Rx cross the continuously formed electrode through the bridge. At the same time, the sub-electrode units of the transmitting electrode Tx and the receiving electrode Rx are both diamond-shaped.

The structure of the display substrate of the touch screen and the relative arrangement position of the touch electrodes and the display substrate in this embodiment may be the same as those of the touch screen in Embodiment 1, and will not be described in detail herein.

In the touch screen of the embodiment, the touch electrode is formed by using the electrode material containing the photosensitive material, and the long-distance operation like the direct contact of the finger with the touch screen is realized, which is convenient and flexible, and extends the application range of the touch screen.

Example 3

The embodiment provides a display device including the touch screen in Embodiment 1 or Embodiment 2.

The display device can be any product or component having a display function, such as a liquid crystal panel, an electronic paper, an OLED panel, a mobile phone, a watch, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.

The display device in this embodiment adopts a touch screen with a photosensitive touch function, so that a display device such as a television or an electronic blackboard can conveniently realize a long-distance operation like a finger directly contacting the touch screen, which is convenient and flexible.

The above is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims.

The present application claims the priority of the Chinese Patent Application No. 201410341234.2 filed on Jul. 17, 2014, the entire disclosure of which is hereby incorporated by reference.

Claims (13)

A touch screen includes a display substrate and a touch electrode, wherein the touch electrode is formed by using an electrode material containing a photosensitive material, and the touch electrode is configured to be controlled by a light source control unit to realize touch point positioning and operation. The light source control unit is in non-direct physical contact with the touch screen and has a light source that is adapted to the photosensitive substance. The touch screen according to claim 1, wherein the photosensitive material is an infrared photosensitive material, and the light source control unit comprises at least one infrared laser pointer or an invisible light device capable of functioning as an infrared touch. The touch panel according to claim 1 or 2, wherein the photosensitive substance comprises at least one of lead sulfide, lead telluride, lead selenide, and amorphous silicon. The touch screen according to any one of claims 1 to 3, wherein a light source in the light source control unit is condensable, and a spot size projected onto the touch screen is within a resolution of the touch screen. The touch screen according to any one of claims 1 to 4, wherein the touch electrode is a resistive touch electrode, and the touch electrode is in a plate shape; and the wavelength range of the infrared light source emitted by the light source control unit is 1000-1500nm. The touch screen of any one of the preceding claims, wherein the touch electrode is a capacitive touch electrode, and the touch electrode comprises a strip-shaped emitter electrode and a strip-shaped receiving electrode; A transparent insulating isolation layer is disposed between the transmitting electrode and the receiving electrode; the infrared light source emitted by the light source control unit has a wavelength ranging from 1000 to 1500 nm. The touch screen according to any one of claims 1 to 6, further comprising a detection IC, wherein the touch electrode and the detection IC are connected by a trace electrode, and the trace electrode is formed of a metal material. The touch screen according to any one of claims 1 to 7, wherein the light source control unit is wearable, and the light source control unit includes a plurality of dispersed light sources. The touch screen according to any one of claims 1 to 8, wherein the touch electrode is disposed inside or on a surface of the touch screen. The touch screen of claim 9, wherein the touch electrodes are disposed on the display substrate by using a GG, OGS or GGF plug-in method, or are disposed on the display substrate by using an In-Cell or On-Cell built-in manner. . A touch screen according to any one of claims 1 to 10, wherein the touch screen employs a rigid display substrate or a flexible display substrate. The touch screen according to any one of claims 1 to 11, wherein the electrode material comprises a metal oxide electrode material or a metal electrode material, and the metal oxide electrode material comprises indium zinc oxide, indium tin oxide, indium oxide or Any one or a combination of zinc oxide; the metal electrode material includes any one of Cr, W, Ti, Ta, Mo, AlNd, Cu, Ag, Al, or an alloy of any of the above metals. A display device comprising the touch screen of any of claims 1-12.

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