WO2020215885A1

WO2020215885A1 - Display device, and touch detection method and device

Info

Publication number: WO2020215885A1
Application number: PCT/CN2020/076799
Authority: WO
Inventors: 张平; 王海生; 丁小梁; 王鹏鹏; 曹学友; 韩艳玲; 李扬冰; 邓立凯; 王佳斌; 陈博
Original assignee: 京东方科技集团股份有限公司
Priority date: 2019-04-23
Filing date: 2020-02-26
Publication date: 2020-10-29
Also published as: CN110058742A; CN110058742B

Abstract

Provided are a display device, and a touch detection method and device. The display device comprises: an infrared light source located outside a display area of the display device, wherein the infrared light source is used for providing infrared light illumination for a touch surface to be tested; a sensing layer comprising a plurality of infrared sensors distributed in the display area, wherein the infrared sensors are used for measuring a first distance, with the first distance being the propagation distance of infrared light emitted by the infrared light source and reflected on the touch surface to be tested and then reaching the infrared sensors; and an optical structure layer located on at least one side in the thickness direction of the sensing layer, wherein the optical structure layer comprises a plurality of optical structures, each optical structure is located on one side in the thickness direction of a corresponding infrared sensor, and the optical structure is used for limiting the incident angle of infrared light reaching the corresponding infrared sensor. By means of the present disclosure, a depth measurement method requiring a simpler structure can be realized.

Description

Display device, touch detection method and device

This application claims the priority of a Chinese patent application filed on April 23, 2019 with the application number 201910330439.3 and the title of the invention "display device, touch detection method and device", the entire content of which is incorporated into this application by reference.

Technical field

The present disclosure relates to the display field, and in particular to a display device, a touch detection method and a device.

Background technique

Three-dimensional space detection technology refers to a technology that uses machine vision to detect objects, surfaces, distances, and orientations in three-dimensional space. The mobile terminal can use the three-dimensional space detection technology to detect the hand of the operator to realize functions such as three-dimensional touch and gesture recognition. .

Summary of the invention

The present disclosure provides a display device, a touch detection method and a device, which can realize a depth detection method with a simpler required structure.

In a first aspect, the present disclosure provides a display device, which includes:

An infrared light source located outside the display area of the display device, and the infrared light source is used to provide infrared light illumination for the touch surface to be detected;

The sensing layer includes a number of infrared sensors distributed in the display area, the infrared sensor is used to detect a first distance, the first distance is infrared light from the infrared light source and in the to-be-detected The propagation distance of the infrared sensor after being reflected on the touch surface;

The optical structure layer is located on at least one side of the thickness direction of the sensing layer, and the optical structure layer includes a plurality of optical structures, and each of the optical structures is located in the thickness direction of a corresponding infrared sensor. On one side, the optical structure is used to limit the incident angle of infrared light reaching the corresponding infrared sensor.

In a possible implementation manner, the infrared light source includes at least two light-emitting elements, and the at least two light-emitting elements surround the display area of the display device.

In a possible implementation manner, the infrared light source further includes a light-emitting control circuit respectively connected to each light-emitting element, and the light-emitting control circuit is configured to control the at least two light-emitting elements to emit light one by one in each detection period.

In a possible implementation, the display device further includes a touch circuit, and each of the infrared sensors is connected to the touch circuit,

The touch control circuit is used to determine the position where the infrared light reaching the infrared sensor is reflected on the touch surface to be detected from the first distance, the second distance and the receiving angle for each infrared sensor;

Wherein, the second distance is the distance between the infrared sensor and the infrared light source, and the receiving angle is the incident angle of the infrared light received by the infrared sensor limited by the optical structure.

In a possible implementation manner, the display device includes an organic light-emitting layer, and the organic light-emitting layer includes a plurality of light-emitting patterns located in the display area;

In the plane where the display device is located, at least a part of the orthographic projection of each infrared sensor is located between the orthographic projections of two adjacent light-emitting patterns.

In a possible implementation manner, in the plane where the display device is located, the orthographic projection of each infrared sensor is located between the orthographic projections of two adjacent light-emitting patterns.

In a possible implementation, the display device further includes a first substrate, a second substrate, and an organic light-emitting layer, and the organic light-emitting layer, the optical structure layer, and the sensing layer are on the first substrate. And the second substrate are sequentially stacked.

In a possible implementation manner, the infrared light source and the organic light-emitting layer are located in the same layer between the first substrate and the second substrate.

In a possible implementation, the display device further includes a first substrate, a second substrate, a third substrate, and an organic light-emitting layer, and the second substrate is located between the first substrate and the third substrate The organic light emitting layer is located between the first substrate and the second substrate, and the optical structure layer and the sensing layer are located between the second substrate and the third substrate.

In a second aspect, the present disclosure also provides a touch detection method, the method including:

Controlling an infrared light source to provide infrared light illumination to the touch surface, the infrared light source being located outside the display area of the display device;

Acquire a first distance detected by each of a plurality of infrared sensors, the plurality of infrared sensors are distributed within the display area of the display device, and the first distance is the distance of infrared light from the infrared The propagation distance of the infrared sensor after the light source starts and reflects on the touch surface to be detected. The incident angle of the infrared light reaching each infrared sensor is limited by a corresponding optical structure. The optical structure is located on one side in the thickness direction of the corresponding one of the infrared sensors in the display device;

For each infrared sensor, the position at which the infrared light reaching the infrared sensor is reflected on the touch surface to be detected is determined by the first distance, the second distance, and the receiving angle;

In a possible implementation manner, the infrared light source includes at least two light-emitting elements, and the at least two light-emitting elements surround the display area of the display device;

Correspondingly, the providing infrared light illumination to the touch surface through an infrared light source includes:

In each detection period, controlling the at least two light-emitting elements to emit light one by one to obtain a detection result corresponding to each of the light-emitting elements;

Correspondingly, the method further includes:

The detection results respectively corresponding to each of the light-emitting elements are integrated to obtain the detection results of the touch surface to be detected.

In a third aspect, the present disclosure also provides a touch detection device, which includes:

A light emission control module for controlling an infrared light source to provide infrared light illumination to the touch surface, the infrared light source being located outside the display area of the display device;

The detection module is used to obtain a first distance detected by each of a plurality of infrared sensors, the plurality of infrared sensors being distributed within the display area of the display device, and the first distance being infrared The propagation distance of light from the infrared light source and reflected on the touch surface to be detected to reach the infrared sensor, the incident angle of the infrared light reaching each infrared sensor is limited by a corresponding optical structure , Each of the optical structures is located on one side in the thickness direction of the corresponding one of the infrared sensors in the display device;

A processing module, configured to determine the position where the infrared light reaching the infrared sensor is reflected on the touch surface to be detected from the first distance, the second distance, and the receiving angle for each infrared sensor;

Correspondingly, the light emission control module is further used for:

Correspondingly, the device further includes:

The integration module is used to integrate the detection results respectively corresponding to each of the light-emitting elements to obtain a complete detection result of the touch surface to be detected.

In a fourth aspect, the present disclosure also provides a touch detection device, the device including:

processor;

A memory for storing executable instructions of the processor;

Wherein, the processor is configured to:

It can be seen from the above technical solutions that the infrared light source, the sensing layer and the optical structure layer in the present disclosure can cooperate to detect the position where the infrared light reflects on the touch surface to be detected, thereby realizing the detection of the finger surface when the finger approaches the display device . Compared with the depth detection technology that requires the use of a camera device, the depth detection method provided by the present disclosure does not need to introduce an image processing module or a complicated CMOS device manufacturing process, and the required structure and manufacturing process are simpler.

Description of the drawings

FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the present disclosure;

2 is a schematic structural diagram of a display device provided by another embodiment of the present disclosure;

3 is a schematic structural diagram of a display device provided by another embodiment of the present disclosure;

4 is a schematic structural diagram of a display device according to another embodiment of the present disclosure;

5 is a schematic structural diagram of a display device provided by another embodiment of the present disclosure;

FIG. 6 is a schematic flowchart of a touch detection method for a display device according to an embodiment of the present disclosure;

FIG. 7 is a structural block diagram of a touch detection device of a display device according to an embodiment of the present disclosure;

FIG. 8 is a structural block diagram of a touch detection device of a display device according to another embodiment of the present disclosure.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the following further describes the embodiments of the present disclosure in detail with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the protection scope of the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. "Including" or similar words means that the elements or items appearing before the word cover the elements or items listed after the word and their equivalents, but do not exclude other elements or items. Similar words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, and the connections may be direct or indirect.

In related technologies, whether it is binocular stereo vision technology, structured light technology or TOF (Time of Flight) technology, the imaging function is implemented in a camera-like mode to complete depth detection (three-dimensional space detection). The device used The device is difficult to fabricate on the display panel, and generally can only be integrated into the display device in the form of an accessory module, which is not conducive to the simplification of the structure of the display device.

FIG. 1 is a schematic diagram of the structure of a display device provided by an embodiment of the present disclosure. Referring to FIG. 1, the display device includes an infrared light source 21, a sensing layer 22 and an optical structure layer 23. Wherein, the infrared light source 21 is located outside the display area of the display device and is used to provide infrared light illumination for the touch surface 100 to be detected; the sensing layer 22 includes a number of infrared sensors 221 distributed in the display area; optical structure The layer 23 is located on one side in the thickness direction of the sensing layer 22 and includes a plurality of optical structures 231, and each optical structure 231 is located on one side in the thickness direction of a corresponding infrared sensor 221. Each infrared sensor 221 is used to detect the propagation distance (hereinafter referred to as the "first distance") of infrared light from the infrared light source 21 and reflected on the touch surface 100 to be detected to reach the infrared sensor 221, and each optical structure 231 is used to limit the incident angle of the infrared light reaching the corresponding infrared sensor 221.

In an example, the sensing layer 22 and the optical structure layer 23 are both layer structures formed on a base substrate in the display panel of the display device (other layer structures, such as metal electrodes, may also be formed on the base substrate. At least one of a layer, a transparent electrode layer, an organic light-emitting material layer, and an insulating material layer). Exemplarily, the infrared light source 21 may be located in the display panel (for example, on the base substrate outside the display area), on the circuit board bound to the display panel, on the frame surrounding the display panel, or the frame and Between display panels.

Referring to FIG. 1, in an example, the touch detection process of the display device may be as follows: when the user's finger approaches the surface of the display device, the surface of the finger forms the touch to be detected The surface 100, at this time, the infrared light source 21 can provide infrared light illumination to the touch surface 100 to be detected. The infrared light emitted by the infrared light source 21 may be partially reflected when it reaches the touch surface 100 to be detected, and the reflected infrared light may reach the optical structure layer 23 according to different incident angles. Therefore, each optical structure 231 in the optical structure layer 23 can be based on a structure such as a collimating microlens or a collimating thick hole to prevent infrared light with an incident angle outside the specified range from reaching the corresponding infrared sensor 221, so that each infrared The sensors 221 can only receive infrared light whose incident angle is within a specified range. In this way, when an infrared sensor 221 detects a first distance (such as the sum of the first length L1 and the second length L2 in FIG. 1), the incident angle limited by the optical structure 231 (such as about 90°) can be combined with The positional relationship between the infrared sensor 221 and the infrared light source 21 (for example, represented by the third length L3 in FIG. 1), the position at which the infrared light is reflected (for example, the position of the point P0 in FIG. 1) is calculated through geometric principles , The coordinate value in the thickness direction of the display device can be represented by calculating the second length L2, and the coordinate values in the remaining two coordinate directions can be represented by the position coordinates of the infrared sensor 221 in the display area). It should be understood that, in order to facilitate the calculation, the above calculation process can be simplified or reduced, for example, the height difference between the infrared sensor 221 and the infrared light source 21 is ignored, or the range of the incident angle limited by the optical structure 231 is used. The intermediate value of (for example, the intermediate value of the incident angle range of 85 degrees to 95 degrees is 90 degrees) represents the incident angle for calculation, and so on. Based on the first distance detected by each infrared sensor 221, the position of a point on the touch surface 100 to be detected can be obtained respectively. In this way, the obtained position of each point can be synthesized to obtain a depth image of the surface of the current user's finger, and touch control can be realized accordingly.

It can be seen that the infrared light source, the sensing layer and the optical structure layer in the embodiments of the present disclosure can cooperate with each other to detect the position where the infrared light reflects on the touch surface to be detected, thereby realizing the detection of the finger surface when the finger approaches the display device . Compared with the depth detection technology that requires the use of a camera device, the depth detection method provided by the embodiments of the present disclosure does not need to introduce an image processing module or a complicated CMOS device manufacturing process, and the required structure and manufacturing process are simpler.

It should be noted that the infrared sensor 221 is different from a sensor that senses the intensity of infrared light in the traditional sense, but belongs to a sensor that measures the propagation distance of the received infrared light based on the principle of optical distance measurement. In one example, the infrared light source 21 can emit one or more infrared light pulses in each detection period, and the infrared light sensor 221 measures the length of time from when the infrared light pulse is sent to being received, so as to calculate the above-mentioned first pulse. A distance. In another example, the infrared light source 21 may emit modulated (such as amplitude modulation and phase modulation) infrared light, and the infrared sensor 221 measures the phase delay of the received infrared light relative to the infrared light emitted by the infrared light source 21, thereby This calculates the first distance mentioned above.

In one example, in order to obtain an ideal detection result, the display device may be configured in the following aspects: the irradiation area of the infrared light source 21 may be inclined toward the display panel to cover the possible spatial range of the touch surface 100 to be detected as much as possible; The emission wavelength of the infrared light source 21 can be matched with the receiving wavelength of the infrared sensor 221 (for example, the main wavelength of the infrared light emitted by the infrared light source 21 is consistent with the most sensitive wavelength of the infrared sensor 221) to increase the signal-to-noise ratio of the sensing signal The infrared sensor 221 can be formed by a device that can respond quickly to infrared light, such as avalanche diodes, PIN photodiodes, etc.; the range of incident angles limited by the optical structure 231 can be as small as possible to reduce calculation errors and enhance noise Inhibition of light. In addition, for the convenience of calculation, the positional relationship between the infrared light source 21 and each infrared sensor 221 may be fixed, so that the positional relationship between the infrared sensor 221 and the infrared light source 21 can be pre-configured in the display device as a fixed parameter , There is no need to perform the step of acquiring the position information of the infrared light source 21 in the process of touch detection.

It can be seen in the above touch detection process that if there are areas on the touch surface 100 to be detected that are not illuminated by infrared light, then there will be no infrared light reflected in these areas and received by the infrared sensor 221 , So these areas will become blind areas for touch detection. In order to avoid the occurrence of blind spots, light-emitting elements with a larger illumination range may be used as far as possible in the infrared light source 21, or multiple light-emitting elements may be used to provide infrared light illumination to the touch surface 100 to be detected.

FIG. 2 is a schematic structural diagram of a display device according to another embodiment of the present disclosure. 2, in an example, the infrared light source 21 in the display device includes a first light-emitting element 211 and a second light-emitting element 212, and the first light-emitting element 211 and the second light-emitting element 212 surround the display of the display device. Outside the area (Figure 2 is located on the left and right sides of the display panel as an example). In this way, the first light-emitting element 211 and the second light-emitting element 212 can respectively provide infrared light illumination to different areas of the touch surface 100 to be detected (the illumination areas of different light-emitting elements may partially overlap). On this basis, since the infrared sensor 221 cannot distinguish which light-emitting element the infrared light received comes from, it is possible to make each light-emitting element emit light in different periods of time during touch detection. The position data of different light-emitting elements (that is, the data representing the positional relationship between the infrared sensor and the infrared light source) are used for touch detection to obtain depth image data under different illumination areas, and the final depth image can be integrated by The depth image data under the illumination area is obtained.

In an example, the display device performs touch detection once in each detection period, where each detection period includes a first period and a second period, and the start time of the second period is after the end time of the first period. Referring to FIG. 2, in the first time period, the first light-emitting element 211 provides infrared light illumination from the left side of FIG. 2 to the touch surface 100 to be detected. At this time, the sensing signal of each infrared sensor 221 can be collected according to the The process described above detects the touch surface 100 to be detected in the illumination area; in the second time period, the second light-emitting element 212 provides infrared light illumination to the touch surface 100 to be detected from the right side in FIG. The sensing signal of each infrared sensor 221 can be collected to detect the touch surface 100 to be detected in the illuminated area according to the above-mentioned process. After the second time period is over, the depth image data of the overlapping part of the illumination area of the two light-emitting elements can be integrated (for example, a line segment formed by connecting two position points sequentially detected based on the sensing signal of the same infrared sensor 221 As the integration result), it is combined with the depth image data of other parts into the depth image detected by the current detection cycle.

Taking this as an example, the infrared light source 21 may also include more than two light-emitting elements, which can surround the display area of the display device, and can realize each frame by emitting light one by one in each detection period. Detection of depth images.

FIG. 3 is a schematic structural diagram of a display device provided by another embodiment of the present disclosure. 3, in the display device, the infrared light source 21 includes a first light-emitting element 211, a second light-emitting element 212, a third light-emitting element 213, and a fourth light-emitting element 214 surrounding the display area A1. The element 211, the second light-emitting element 212, the third light-emitting element 213, and the fourth light-emitting element 214 are all located in the peripheral area A2 outside the display area A1. In addition, the display device further includes a light-emitting control circuit 24 and a touch circuit 25. The light-emitting control circuit 24 is connected to each light-emitting element through a connection structure, and the touch circuit 25 is connected to each light-emitting element in the display area A1 through the connection structure. The infrared sensor 221 is connected. In one example, the light emitting control circuit 24 may provide current to the light emitting elements based on the connection with the light emitting elements, and control the light emitting state of each light emitting element by controlling the on and off of the current and the magnitude of the current. The touch circuit 25 can receive the sensing signal collected by the infrared sensor 221 based on the connection with the infrared sensor 221, and thereby realize the above-mentioned touch detection process. In addition, the lighting control circuit 24 and the touch control circuit 25 can use the same clock signal, thereby ensuring synchronization between each other; in one example, the lighting control circuit 24 and the touch control circuit 25 can be connected to the same timing controller, and Receive the synchronous clock signal from the timing controller.

1 and 3, in an example, the touch detection process of the display device may be as follows: the display device performs a touch detection in each detection period, and correspondingly, the light-emitting control circuit 24 During the detection period, each light-emitting element is controlled to emit light one by one. Taking the time period during which the first light-emitting element 211 emits light as an example, the touch circuit 25 can perform detection in each illumination area on the touch surface 100 to be detected in the following manner: First, the touch circuit 25 obtains the detection of each infrared sensor 221 The first distance obtained. For example, the touch circuit 25 may receive the sensing signal of each infrared sensor 221 synchronously based on the connection between each infrared sensor 221, and after at least one of shaping, amplifying and filtering it, the touch circuit 25 The data representing the size of the first distance can be detected. It should be noted that the infrared sensor 221 may detect the first distance based on a pulse light source calculation time method, a charge accumulation calculation time method, or a light flight time calculation method, and it may not be limited thereto. It should be understood that the infrared sensor 221 may generate a sensor signal with a voltage amplitude close to zero because it cannot receive infrared light. The detected data close to zero indicates that the infrared sensor 221 does not detect infrared light. Then, the touch control circuit 25 can respectively target each infrared sensor 221 by the first distance, the second distance (the distance between the infrared sensor 221 and the light-emitting element that is emitting light), and the receiving angle (limited by the optical structure 231). , Determine the position where the infrared light reaching the infrared sensor 221 reflects on the touch surface 100 to be detected. For example, for the case where the receiving angle shown in FIG. 1 is 90°, the height difference H1 between the sensing layer 22 and the first light-emitting element 11 can be measured or estimated in advance as a fixed parameter, so as to obtain the calculation relationship according to the Pythagorean theorem L3 ² + (L2-H1) ² = L1 ^{2 is} calculated to obtain a data table and stored in the memory where the touch circuit 25 can read the data, so that the touch circuit 25 can look up the table according to the first distance (ie L1 +L2) and the position identifier of the infrared sensor 221 (used to indicate the second distance, where the second distance is the above L3) to obtain the depth data of the corresponding position (that is, the above L2), and the position identifier of the infrared sensor 221 is stored in the touch In the storage area of the test results. After the processing for each infrared sensor 221 is completed, a number of depth data corresponding to the position identification of the infrared sensor 221 will be stored in the storage area of the touch detection result, which can represent a number of the touch surface 100 to be detected. The position of the point relative to the display device in the three-dimensional space (that is, it can be drawn as the aforementioned depth image).

After completing the touch detection corresponding to each of the light-emitting elements, the touch circuit 25 may integrate the detection results respectively corresponding to each of the light-emitting elements to obtain the detection result of the touch surface to be detected. In one example, the touch circuit 25 may store the touch detection results corresponding to different light-emitting elements in different storage areas, so that after the touch detection corresponding to each light-emitting element is completed, all the obtained touch detection results The results are averaged. For example, all the non-zero depth data corresponding to the position identification of the same infrared sensor 221 may be averaged. In another example, the touch control circuit 25 may store the touch detection results corresponding to different light-emitting elements in the same storage area. For example, at the beginning of each detection cycle, the position identifier of each infrared sensor 221 corresponding to the stored depth data can be set to zero; each time the touch detection result is detected, it is determined whether the position identifier of the infrared sensor 221 has been stored correspondingly. The depth data that is not zero; if it does not exist, the depth data to be stored is directly stored; if it exists, the depth data to be stored and the stored depth data are averaged and the original depth data is overwritten. In this way, the storage space of the touch detection result can be saved.

It can be seen that multiple light-emitting elements emit light one by one in each detection cycle and perform touch detection separately, and multiple touch detection results in the same detection cycle can be obtained without interfering with each other in the touch detection process. These touch detection results can be Complement each other to reduce the blind area of touch detection, and can also be used for mutual comparison to eliminate erroneous data and reduce errors, to achieve more ideal three-dimensional touch detection.

FIG. 4 is a schematic structural diagram of a display device provided by another embodiment of the present disclosure. 4, in an example, the display device includes a first substrate 27 and a second substrate 28, and also includes an infrared light source 21, a sensing layer 22, an optical structure layer 23, and an organic light emitting layer, wherein the organic light emitting layer includes several A light-emitting pattern 261, a cathode structure layer 262, and an anode structure layer 263, each light-emitting pattern 261 is located in the display area A1, the organic light-emitting layer, the optical structure layer 23 and the sensing layer 22 are on the first substrate 27 and The two substrates 28 are stacked in sequence. The infrared light source 21 is located in the peripheral area A2 outside the display area A1, and is located in the same layer between the first substrate 27 and the second substrate 28 as the organic light-emitting layer. In one example, the cathode structure layer in the organic light-emitting layer may include the cathode of the light-emitting pattern 261, and the anode structure layer 263 in the organic light-emitting layer may include the anode of the light-emitting pattern 261. The shape and structure of the organic light-emitting layer may refer to any one. The shape and structure of the film layer on the base substrate in the organic light-emitting diode display device are realized, which will not be repeated here. 4, in an example, the infrared light source 21 includes an infrared light-emitting material layer 210 in the same layer as the light-emitting pattern 261, the cathode of the infrared light-emitting material layer 210 and the cathode of the light-emitting pattern 261 are the same layer, and the anode of the infrared light-emitting material layer 210 and The anode of the light-emitting pattern 261 is the same layer, and the infrared light-emitting material layer 210 and its anode and cathode constitute a light-emitting element in the infrared light source 21. That is, the same or similar manufacturing process can be used to form the required infrared light source 21 when manufacturing the organic light-emitting layer, so as to simplify the internal structure and manufacturing process of the display device.

Referring to FIG. 4, in an example, in the plane where the display device is located, the orthographic projection of each infrared sensor 221 is located between the orthographic projections of two adjacent light-emitting patterns 261. For example, the upper part of each infrared sensor 221 in FIG. 4 is a gap between two adjacent light-emitting patterns 261. In this way, infrared light from above can pass through the gap between the light-emitting patterns 261 to reach the infrared sensor 221, so as to realize the above-mentioned touch detection process. Based on this, the distance between two adjacent infrared sensors 221 is equivalent to the distance between two adjacent light-emitting patterns 261, which is more conducive to high-resolution touch detection.

FIG. 5 is a schematic structural diagram of a display device provided by another embodiment of the present disclosure. Referring to FIG. 5, in an example, the display device includes a first substrate 27, a second substrate 28, and a third substrate 29, and further includes an infrared light source 21, a sensing layer 22, an optical structure layer 23, and an organic light emitting layer, wherein The organic light-emitting layer includes several light-emitting patterns 261, a cathode structure layer 262 and an anode structure layer 263. Each light-emitting pattern 261 is located in the display area. The second substrate 28 is located between the first substrate 27 and the third substrate 29. The light-emitting layer is located between the first substrate 27 and the second substrate 28, and the optical structure layer 23 and the sensing layer 22 are located between the second substrate 28 and the third substrate 29. In one example, the cathode structure layer in the organic light-emitting layer may include the cathode of the light-emitting pattern 261, and the anode structure layer 263 in the organic light-emitting layer may include the anode of the light-emitting pattern 261. The shape and structure of the organic light-emitting layer may refer to any one. The shape and structure of the film layer on the base substrate in the organic light-emitting diode display device are realized, which will not be repeated here.

Referring to FIG. 5, in an example, the optical structure layer 23 includes a first optical structure layer and a second optical structure layer respectively located on both sides of the sensing layer 22 in the thickness direction, and the infrared light source 21 includes a front surface of the display device ( The upper part in FIG. 5) provides the first light-emitting element 211 and the second light-emitting element 212 for infrared light illumination, and also includes the third light-emitting element 213 and the fourth light-emitting element 213 and the fourth light-emitting element that provide infrared light to the back of the display device (lower part in FIG. 5) Component 214. In this way, the optical structure in the first optical structure layer and the optical structure in the second optical structure layer can respectively limit the incident angle of the infrared light reaching the infrared sensor 221 in two directions, and the four light-emitting elements can be as described above In this way, light is sequentially emitted in each detection cycle, so as to simultaneously realize touch detection on the front of the display device and touch detection on the back of the display device without mutual interference. Taking this as an example, any display device capable of realizing single-sided touch detection in the embodiments of the present disclosure can be transformed into a display device capable of realizing double-sided touch detection with reference to the display device shown in FIG. 5. A repeat.

Referring to FIG. 5, in an example, in the plane where the display device is located, the orthographic projection of each infrared sensor 221 is partially located between the orthographic projections of two adjacent light-emitting patterns 261. For example, there is at least one gap between two adjacent light-emitting patterns 261 above each infrared sensor 221 in FIG. 5. In this way, infrared light from above can pass through the gap between the light-emitting patterns 261 to reach the infrared sensor 221, so as to realize the above-mentioned touch detection process. Based on this, the size of the infrared sensor 221 and the optical structure 231 may not need to be consistent with the sub-pixel width of the display device, and the corresponding process requirements and process difficulty can be reduced.

Comparing FIGS. 4 and 5, it can be seen that since the organic light-emitting layer, optical structure layer 23, and sensing layer 22 in FIG. 4 are all located between the first substrate 27 and the second substrate 28, the process needs to be Fabricating each of the organic light-emitting layer, the optical structure layer 23, and the sensing layer 22 on the same base substrate requires a higher level of technology, but at the same time, it is more conducive to the thinning of the display device. Since the second substrate 28 in FIG. 5 is located between the first substrate 27 and the third substrate 29, the organic light emitting layer is located between the first substrate 27 and the second substrate 28, and the optical structure layer 23 and the sensing layer 22 are located on the second substrate. Between the substrate 28 and the third substrate 29, there is no need to fabricate each of the organic light-emitting layer, the optical structure layer 23 and the sensing layer 22 on the same base substrate in the process, although this will make the display device relatively more Thick, but can reduce the requirements on the level of process.

It should be noted that the display device in the embodiment of the present disclosure may be any product or component with display function, such as a display panel, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.

Fig. 6 is a schematic flowchart of a touch detection method of a display device provided by an embodiment of the present disclosure. The display device may be any one of the above-mentioned display devices. Referring to Fig. 6, the method may include the following steps.

In step 601, the infrared light source is controlled to provide infrared light illumination to the touch surface.

In step 602, the first distance detected by each of the plurality of infrared sensors is acquired.

In step 603, for each infrared sensor, the first distance, the second distance, and the receiving angle are used to determine the position where the infrared light reaching the infrared sensor reflects on the touch surface to be detected.

Wherein, the infrared light source is located outside the display area of the display device. The plurality of infrared sensors are distributed within the display area of the display device, and the first distance is that infrared light starts from the infrared light source and reaches the infrared light after being reflected on the touch surface to be detected The propagation distance of the sensor and the incident angle of the infrared light reaching each of the infrared sensors are limited by a corresponding optical structure, and each optical structure is located in the display device of a corresponding infrared sensor. One side in the thickness direction. The second distance is the distance between the infrared sensor and the infrared light source, and the receiving angle is the incident angle of the infrared light received by the infrared sensor limited by the optical structure.

In a possible implementation, the infrared light source includes at least two light-emitting elements, and the at least two light-emitting elements surround the display area of the display device; correspondingly, the infrared light source is directed toward the The provision of infrared light illumination on the touch surface includes: controlling the at least two light-emitting elements to emit light one by one in each detection period to obtain detection results corresponding to each of the light-emitting elements; correspondingly, the touch The detection method further includes: integrating the detection results respectively corresponding to each of the light-emitting elements to obtain the detection result of the touch surface to be detected.

It should be understood that the optional implementation manners and related descriptions of the method of this embodiment have already been included in the foregoing, so they will not be repeated here.

Fig. 7 is a structural block diagram of a touch detection device of a display device according to an embodiment of the present disclosure. Referring to FIG. 7, the display device may be any of the above-mentioned display devices. Referring to FIG. 7, the touch detection device may include the following structure.

The light-emitting control module 71 is used to control an infrared light source to provide infrared light illumination to the touch surface, the infrared light source is located outside the display area of the display device.

The detection module 72 is configured to obtain a first distance detected by each of a plurality of infrared sensors, the plurality of infrared sensors are distributed in the display area of the display device, and the first distance is The infrared light starts from the infrared light source and is reflected on the touch surface to be detected to reach the propagation distance of the infrared sensor. The incident angle of the infrared light reaching each infrared sensor is determined by a corresponding optical structure. Restriction, each of the optical structures is located on one side of the thickness direction of the corresponding infrared sensor in the display device.

The processing module 73 is configured to determine the position where the infrared light reaching the infrared sensor is reflected on the touch surface to be detected from the first distance, the second distance, and the receiving angle for each infrared sensor; wherein, The second distance is the distance between the infrared sensor and the infrared light source, and the receiving angle is the incident angle of the infrared light received by the infrared sensor limited by the optical structure.

In a possible implementation, the infrared light source includes at least two light-emitting elements, and the at least two light-emitting elements surround the display area of the display device; correspondingly, the light-emitting control module 71 further Used for: controlling the at least two light-emitting elements to emit light one by one in each detection period to obtain the detection results corresponding to each of the light-emitting elements; correspondingly, the device further includes: an integration module for The integration corresponds to the detection results of each of the light-emitting elements to obtain a complete detection result of the touch surface to be detected.

It should be understood that the above has already included the optional implementation manners and related descriptions of the touch detection device of this embodiment, so they will not be repeated here.

FIG. 8 is a structural block diagram of a touch detection device of a display device according to another embodiment of the present disclosure. Referring to FIG. 8, the display device may be any one of the above-mentioned display devices. Referring to FIG. 8, the touch detection device may include a processor 81 and a memory 82 for storing instructions executable by the processor. The processor 81 is configured to call the program instructions in the memory 82 to execute any one of the touch detection methods of the display device described above.

The processor 81 may include a central processing unit (CPU, single-core or multi-core), a graphics processing unit (GPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), a digital signal processor (DSP), Digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), controller, microcontroller, or multiple integrated circuits used to control program execution.

The memory 82 may include read-only memory (Read-Only Memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (Random Access Memory, RAM), or other types that can store information and instructions The dynamic storage device can also include electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this. The memory can be set independently or integrated with the processor.

The embodiment of the present disclosure also provides a computer storage medium for storing a computer program used in any of the above-mentioned touch detection methods of a display device, the computer program including program instructions. By executing the stored program, the touch detection method of any of the above-mentioned display devices provided in the present disclosure can be realized.

The above are only exemplary embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection of the present disclosure. Within range.

Claims

A display device, characterized in that the display device comprises:

An infrared light source located outside the display area of the display device, and the infrared light source is used to provide infrared light illumination for the touch surface to be detected;

The sensing layer includes a plurality of infrared sensors distributed in the display area, and the infrared sensor is used to detect a first distance, and the first distance is emitted by the infrared light source and displayed on the touch to be detected. The propagation distance of the infrared light that reaches the infrared sensor after being reflected on the surface;

The optical structure layer is located on at least one side of the thickness direction of the sensing layer, and the optical structure layer includes a plurality of optical structures, and each of the optical structures is located in the thickness direction of a corresponding infrared sensor. On one side, the optical structure is used to limit the incident angle of infrared light reaching the corresponding infrared sensor.
The display device according to claim 1, wherein the infrared light source comprises at least two light-emitting elements, and the at least two light-emitting elements surround the display area of the display device.
The display device according to claim 2, wherein the infrared light source further comprises a light-emitting control circuit respectively connected to each light-emitting element, and the light-emitting control circuit is used to control the at least two light-emitting elements in each detection period. The light-emitting elements emit light one by one.
The display device of claim 1, wherein the display device further comprises a touch circuit, and each of the infrared sensors is connected to the touch circuit,

The touch control circuit is used to determine the position where the infrared light reaching the infrared sensor is reflected on the touch surface to be detected from the first distance, the second distance and the receiving angle for each infrared sensor;

Wherein, the second distance is the distance between the infrared sensor and the infrared light source, and the receiving angle is the incident angle of the infrared light received by the infrared sensor limited by the optical structure.
The display device according to claim 1, wherein the display device comprises an organic light-emitting layer, and the organic light-emitting layer comprises a plurality of light-emitting patterns located in the display area;

In the plane where the display device is located, at least a part of the orthographic projection of each infrared sensor is located between the orthographic projections of two adjacent light-emitting patterns.
5. The display device of claim 5, wherein in the plane where the display device is located, the orthographic projection of each infrared sensor is located between the orthographic projections of two adjacent light-emitting patterns.
The display device according to any one of claims 1 to 6, wherein the display device further comprises a first substrate, a second substrate and an organic light emitting layer, the organic light emitting layer, the optical structure layer and The sensing layer is sequentially laminated between the first substrate and the second substrate.
8. The display device according to claim 7, wherein the infrared light source and the organic light emitting layer are located in the same layer between the first substrate and the second substrate.
The display device according to any one of claims 1 to 6, wherein the display device further comprises a first substrate, a second substrate, a third substrate and an organic light emitting layer, and the second substrate is located on the Between the first substrate and the third substrate, the organic light-emitting layer is located between the first substrate and the second substrate, and the optical structure layer and the sensing layer are located between the second substrate and the second substrate. Between the third substrate.
A touch detection method for a display device, characterized in that the method includes:

Controlling an infrared light source to provide infrared light illumination to the touch surface, the infrared light source being located outside the display area of the display device;

Acquire a first distance detected by each of a plurality of infrared sensors, the plurality of infrared sensors are distributed within the display area of the display device, and the first distance is emitted by the infrared light source And the propagation distance of the infrared light reaching the infrared sensor after being reflected on the touch surface to be detected, the incident angle of the infrared light reaching each infrared sensor is limited by a corresponding optical structure, each The optical structure is located on one side in the thickness direction of the corresponding one of the infrared sensors in the display device;

For each infrared sensor, the position at which the infrared light reaching the infrared sensor is reflected on the touch surface to be detected is determined by the first distance, the second distance, and the receiving angle;

Wherein, the second distance is the distance between the infrared sensor and the infrared light source, and the receiving angle is the incident angle of the infrared light received by the infrared sensor limited by the optical structure.
The method according to claim 10, wherein the infrared light source comprises at least two light-emitting elements, and the at least two light-emitting elements surround the display area of the display device;

Correspondingly, the providing infrared light illumination to the touch surface through an infrared light source includes:

In each detection period, controlling the at least two light-emitting elements to emit light one by one to obtain a detection result corresponding to each of the light-emitting elements;

Correspondingly, the method further includes:

The detection results respectively corresponding to each of the light-emitting elements are integrated to obtain the detection results of the touch surface to be detected.
A touch detection device for a display device, wherein the device includes:

A light emission control module for controlling an infrared light source to provide infrared light illumination to the touch surface, the infrared light source being located outside the display area of the display device;

The detection module is used to obtain the first distance detected by each infrared sensor of a plurality of infrared sensors, the plurality of infrared sensors are distributed in the display area of the display device, and the first distance is determined by The propagation distance of the infrared light emitted by the infrared light source and reflected on the touch surface to be detected and reaching the infrared sensor, the incident angle of the infrared light reaching each infrared sensor is determined by a corresponding optical structure By limitation, each of the optical structures is located on one side in the thickness direction of the corresponding one of the infrared sensors in the display device;

A processing module, configured to determine the position where the infrared light reaching the infrared sensor is reflected on the touch surface to be detected from the first distance, the second distance, and the receiving angle for each infrared sensor;

Wherein, the second distance is the distance between the infrared sensor and the infrared light source, and the receiving angle is the incident angle of the infrared light received by the infrared sensor limited by the optical structure.
The device according to claim 12, wherein the infrared light source comprises at least two light-emitting elements, and the at least two light-emitting elements surround the display area of the display device;

Correspondingly, the light emission control module is further used for:

In each detection period, controlling the at least two light-emitting elements to emit light one by one to obtain a detection result corresponding to each of the light-emitting elements;

Correspondingly, the device further includes:

The integration module is used to integrate the detection results respectively corresponding to each of the light-emitting elements to obtain a complete detection result of the touch surface to be detected.
A touch detection device for a display device, wherein the device includes:

processor;

A memory for storing executable instructions of the processor;

Wherein, the processor is configured to:

Controlling an infrared light source to provide infrared light illumination to the touch surface, the infrared light source being located outside the display area of the display device;

Acquire a first distance detected by each of a plurality of infrared sensors, the plurality of infrared sensors are distributed within the display area of the display device, and the first distance is emitted by the infrared light source And the propagation distance of the infrared light reaching the infrared sensor after being reflected on the touch surface to be detected, the incident angle of the infrared light reaching each infrared sensor is limited by a corresponding optical structure, each The optical structure is located on one side in the thickness direction of the corresponding one of the infrared sensors in the display device;

For each infrared sensor, the position at which the infrared light reaching the infrared sensor is reflected on the touch surface to be detected is determined by the first distance, the second distance, and the receiving angle;

Wherein, the second distance is the distance between the infrared sensor and the infrared light source, and the receiving angle is the incident angle of the infrared light received by the infrared sensor limited by the optical structure.
A non-volatile computer-readable storage medium, characterized in that executable instructions are stored on the storage medium, and the executable instructions implement the method according to claim 10 or 11 when executed.