Optical Touch Module, Optical Touch Method and Touch Terminal

Abstract

The present application discloses an optical touch module, an optical touch method, and a touch terminal. The optical touch module includes: a linearly polarized light source for emitting a linearly polarized light beam to a touch area; a polarization photosensitive component including N polarization photosensitive units arranged in an array, each of the polarization photosensitive units having a polarization angle, wherein at least three of the polarization photosensitive units are staggered and have different polarization directions from each other, and each of the polarization photosensitive units is configured to receive a reflected light beam corresponding to the linearly polarized light beam reflected by an occluder in the touch area and output a corresponding detection value; and a processor connected to the polarization photosensitive component for receiving the detection value and determining a movement state of the occluder in the touch area according to the detection value.

Description

Technical Field

[0001] This application belongs to the field of electronic technology, and particularly relates to an optical touch module, an optical touch method, and a touch terminal. Background Art

[0002] With the development of touch technology, the demand for touch responses for user interaction in electronic devices is becoming increasingly widespread. Currently, electronic devices are usually equipped with capacitive or resistive touch screens, and the capacitive / resistive touch response mechanism is used to determine the touch position. Although the sensitivity of capacitive / resistive touch responses is relatively high, it is prone to false touches due to the influence of the overall electromagnetic interference of the machine or factors such as the dryness and humidity of the hand. Summary of the Invention

[0003] This application aims to provide an optical touch module, an optical touch method, and a touch terminal, at least solving the problem that when touch is realized through a capacitive / resistive screen in current electronic devices, false touches are prone to occur due to the influence of factors such as the overall electromagnetic interference of the machine or the dryness and humidity of the hand.

[0004] To solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of this application proposes an optical touch module, including:

[0006] A linearly polarized light source for emitting a linearly polarized light beam to a touch area;

[0007] A polarization photosensitive component including N polarization photosensitive units arranged in an array. Each of the polarization photosensitive units has a polarization angle. At least three of the polarization photosensitive units are staggered and have different polarization directions from each other. Each of the polarization photosensitive units is used to receive the reflected light beam of the corresponding linearly polarized light beam reflected by an occluder in the touch area and output a corresponding detection value;

[0008] A processor, which is connected to the polarization photosensitive component, for receiving the detection value and determining the movement state of the occluder in the touch area according to the detection value.

[0009] According to the optical touch module proposed by this application, there is a basic unit group among the N polarization photosensitive units. The basic unit group includes M polarization photosensitive units. The M polarization photosensitive units are staggered and have different polarization directions from each other;

[0010] The N polarization photosensitive units arranged in an array are topologically obtained from the basic unit group, so that the polarization photosensitive units with the same polarization angle are evenly distributed among the N polarization photosensitive units; where 3 ≤ M < N.

[0011] For the optical touch module proposed according to the present application, the polarization angles of the M polarization-sensitive units are arranged in an arithmetic progression, and the common difference of the arithmetic progression is 180° / M.

[0012] For the optical touch module proposed according to the present application, the working wavelengths of the linearly polarized light source and the polarization-sensitive unit are the same, and are ultra-infrared or ultra-ultraviolet wavelengths.

[0013] In a second aspect, an embodiment of the present application proposes an optical touch method. The optical touch method is applied to any of the above optical touch modules, and the optical touch method includes:

[0014] Controlling the linearly polarized light source to emit a linearly polarized light beam towards the touch area;

[0015] Controlling the polarization-sensitive component to receive the reflected light beam corresponding to the linearly polarized light beam reflected by the occluder in the touch area and output a corresponding detection value; wherein the detection value represents the photosensitive intensity picked up by the corresponding polarization-sensitive unit;

[0016] Determining the movement state of the occluder in the touch area according to the detection values output by the plurality of polarization-sensitive units;

[0017] Outputting a corresponding control response according to the movement state.

[0018] For the optical touch method proposed according to the present application, the determining the movement state of the occluder in the touch area according to the detection values output by the plurality of polarization-sensitive units includes:

[0019] When there is no occluder entering the touch area, receiving the initial detection value output by each polarization-sensitive unit;

[0020] When there is an occluder entering the touch area, receiving the first detection value output by each polarization-sensitive unit at the first moment and the second detection value output by each polarization-sensitive unit at the second moment;

[0021] Determining the initial position of the occluder entering the touch area according to the initial detection value, and determining the movement direction and movement speed of the occluder according to the difference between the first detection value and the second detection value.

[0022] For the optical touch method proposed according to the present application, before outputting the corresponding control response according to the movement state, it further includes:

[0023] Determining the surface characteristics of the occluder according to the movement direction and movement speed of the occluder, and comparing the surface characteristics with preset characteristics;

[0024] If it is determined that the surface feature is consistent with the preset feature, the control response is output.

[0025] The optical touch method provided by this application further includes:

[0026] Obtain instruction information indicating the touch function is turned off;

[0027] Control the linear polarization light source to turn off according to the instruction information.

[0028] In a third aspect, an embodiment of this application provides a touch terminal, including:

[0029] A display panel;

[0030] An optical touch module, where the optical touch module is any of the above optical touch modules, and the touch area is located on the display side of the display panel.

[0031] In the embodiment of this application, by setting a linear polarization light source and a polarization light-sensitive component, the polarization light-sensitive component has N polarization light-sensitive units arranged in an array. The linear polarization light source is used to emit a linear polarization light beam to the touch area, and the polarization light-sensitive unit receives the reflected light beam reflected by the occluder in the touch area and outputs a detection value related to the light-sensitive intensity. The processor can determine the movement state of the occluder in the touch area according to the change of these detection values, and can also determine the surface feature of the occluder according to the change of the detection values output by the polarization light-sensitive units with different polarization directions, and make a corresponding touch response based on this surface feature, so as to realize the touch operation of the user. The touch response of this optical touch module is not easily affected by factors such as the electromagnetic interference of the whole machine, the humidity of the touch object, and the change of the touch area, reducing unnecessary false triggers.

[0032] The additional aspects and advantages of this application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of this application. Description of the Drawings

[0033] The above and / or additional aspects and advantages of this application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0034] Figure 1 is a schematic diagram of an optical touch module according to an embodiment of this application;

[0035] Figure 2 is a topological schematic diagram of a polarization light-sensitive unit in an optical touch module according to an embodiment of this application;

[0036] Figure 3 is a flowchart of an optical touch method according to an embodiment of this application;

[0037] Reference Signs:

[0038] 1. Linear polarization light source; 2. Polarization photosensitive component; 20a. Basic unit group; 20b. First topological unit group; 20c. Second topological unit group; 21. Polarization photosensitive unit; 3. Processor; 4. Occluder. Specific implementation manner

[0039] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0040] The terms "first", "second", and "third" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0041] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0042] The following is combined with Figures 1 - 3 Describe an optical touch module, an optical touch method, and a touch terminal according to an embodiment of the present application.

[0043] As Figure 1As shown in the figure, the present application proposes an optical touch module, which includes a linearly polarized light source 1, a polarization photosensitive component 2, and a processor 3. The linearly polarized light source 1 is used to emit a linearly polarized light beam I to the touch area. The polarization photosensitive component 2 includes N polarization photosensitive units 21 arranged in an array, and each polarization photosensitive unit 21 has a polarization angle. At least three of the polarization photosensitive units 21 are staggered and have different polarization directions from each other. Each polarization photosensitive unit 21 is used to receive a reflected light beam II corresponding to the linearly polarized light beam reflected by an occluder 4 in the touch area, and output a corresponding detection value. The processor 3 is connected to the polarization photosensitive component 2, and is used to receive the detection value and determine the movement state of the occluder 4 in the touch area according to the detection value.

[0044] It can be understood that the touch area is used for users to perform touch operations, and it can be a two-dimensional space area located on the display side of the touch terminal. The linearly polarized light source 1 emits a linearly polarized light beam I to the entire touch area. The occluder 4 can be any object that can reflect the linearly polarized light beam I, such as a user's finger, a stylus, or a glove that enters the touch area. The occluder 4 can block and reflect at least part of the linearly polarized light beam I to form a reflected light beam II. The polarization photosensitive component 2 includes at least three polarization photosensitive units 21 arranged in an array. The processor 3 can be set independently of the controller of the touch terminal itself and communicate with the controller, or can be a part of the controller of the touch terminal itself.

[0045] The working wavelengths of the linearly polarized light source 1 and the polarization photosensitive unit 21 are the same. The linearly polarized light source 1 and the polarization photosensitive unit 21 can be set at any position of the touch terminal, as long as it is satisfied that the polarization photosensitive unit 21 cannot receive the linearly polarized light beam I but can receive the reflected light beam II. The polarization photosensitive unit 21 receives the reflected light beam II and feeds back the photosensitive intensity, and the detection value output by it characterizes the photosensitive intensity fed back by it.

[0046] When the polarization photosensitive unit 21 does not receive the reflected light beam II, the picked-up photosensitive intensity is the same, and the output detection value is the initial value. For example, the initial detection value is 0. When the polarization photosensitive unit 21 receives the reflected light beam II, the output detection value thereof will change, and the detection values output by the polarization photosensitive units 21 that do not receive the reflected light beam II are still the initial detection values.

[0047] It can be understood that the distribution position of each polarization photosensitive unit 21 among the N polarization photosensitive units 21 is known. When the occluder 4 sweeps across the touch area, it will block part of the linearly polarized light beam I, and the generated reflected light beam II is incident on the corresponding polarization photosensitive unit 21, causing the detection value of the polarization photosensitive unit 21 to change. The positions of these polarization photosensitive units 21 that participate in receiving the reflected light beam II among the N polarization photosensitive units 21 correspond to the movement path of the occluder 4 in the touch area.

[0048] The processor 3 can determine the movement state of the occluder 4 in the touch area according to the polarization light-sensitive unit 21 whose detection value changes; or, determine the polarization light-sensitive unit 21 whose detection value changes according to the polarization light-sensitive unit 21 whose detection value does not change, and then determine the movement state of the occluder 4 in the touch area according to the polarization light-sensitive unit 21 whose detection value changes. The movement state includes the movement direction and movement speed of the occluder 4.

[0049] The photosensitive intensity picked up by the polarization light-sensitive unit 21 decreases as the angle (the angle is within the range of less than or equal to 90°) between its polarization direction and the polarization direction of the linearly polarized light source 1 increases. When the polarization direction of the polarization light-sensitive unit 21 is consistent with the polarization direction of the linearly polarized light source 1, the signal intensity picked up by the polarization light-sensitive unit 21 is the strongest. When the polarization direction of the polarization light-sensitive unit 21 is inconsistent with and orthogonal to the polarization direction of the linearly polarized light source 1, the signal intensity picked up by the polarization light-sensitive unit 21 is almost 0.

[0050] At least three polarization light-sensitive units 21 are arranged in an interleaved manner and have different polarization directions among them. It can be understood that the at least three polarization light-sensitive units 21 with different polarization directions are arranged at intervals in two-dimensional directions. Based on the phase difference distribution of the polarization light-sensitive units 21 with different polarization directions and the movement direction and movement speed of the occluder 4, the surface features of the occluder 4 can be determined, such as concave and convex features such as fingerprint biometric features and glove fabric features. Through at least three polarization light-sensitive units 21 arranged in an interleaved manner, the recognition of two-dimensional features can be achieved.

[0051] The optical touch module provided by the embodiment of the present application, by setting the linearly polarized light source 1 and the polarization light-sensitive component 2, the polarization light-sensitive component 2 has N polarization light-sensitive units 21 arranged in an array, uses the linearly polarized light source 1 to emit a linearly polarized light beam Ⅰ to the touch area, receives the reflected light beam Ⅱ reflected by the occluder 4 in the touch area through the polarization light-sensitive unit 21, and outputs a detection value related to the photosensitive intensity. The processor 3 can determine the movement state of the occluder 4 in the touch area according to the change of these detection values, and can also determine the surface features of the occluder 4 according to the change of the detection values output by the polarization light-sensitive units 21 with different polarization directions, and make corresponding touch responses based on the surface features, so as to realize the touch operation of the user. The touch response of this optical touch module is not easily affected by factors such as the electromagnetic interference of the whole machine, the dryness and humidity of the touch object, and the change of the touch area, reducing unnecessary false triggers.

[0052] Optionally, to avoid the influence of external natural light on detection or false triggering caused by the heat generation of the occluder 4 itself, the operating wavelengths of the linearly polarized light source 1 and the polarization-sensitive unit 21 are selected as wavelengths that are rarely seen in nature, such as far-infrared or far-ultraviolet wavelengths. In this case, the polarization-sensitive unit 21 can only receive the reflected beam II. Then, in the case where the reflected beam II is not received, the initial detection value is 0.

[0053] In some embodiments of the present application, one basic unit group 20a is included in the N polarization-sensitive units 21. The basic unit group 20a includes M polarization-sensitive units 21, and the M polarization-sensitive units 21 are arranged in a staggered manner and have different polarization directions from each other. The N polarization-sensitive units 21 arranged in an array are topologically obtained from the basic unit group 20a, so that the polarization-sensitive units 21 with the same polarization angle are evenly distributed among the N polarization-sensitive units 21. Among them, 3 ≤ M < N.

[0054] It can be understood that the M polarization-sensitive units 21 are the at least three polarization-sensitive units 21 arranged in a staggered manner and having different polarization directions from each other as described in the above embodiments. The N polarization-sensitive units 21 may have at least only the M polarization-sensitive units 21 included in one basic unit group 20a.

[0055] When the number of the polarization-sensitive units 21 of the N polarization-sensitive units 21 is greater than M, the N polarization-sensitive units arranged in a matrix are topologically obtained from the basic unit group 20a. That is, among the N polarization-sensitive units 21, there are only polarization-sensitive units 21 with M polarization angles, and these M polarization angles correspond one-to-one and are the same as the polarization angles of the M polarization-sensitive units 21 in the basic unit group 20a.

[0056] Among them, the topological method aims to enable multiple polarization-sensitive units 21 with the same polarization angle to be evenly distributed in the polarization-sensitive array, so that the polarization-sensitive units 21 with the same polarization angle are evenly arranged in the polarization-sensitive array according to a specific rule, in order to facilitate determining the surface characteristics of the occluder 4 in combination with the regular arrangement and the moving state of the occluder 4.

[0057] Specifically, the M polarization-sensitive units 21 are arranged adjacent to each other and are centrosymmetrically distributed. As Figure 2 shown, the basic unit group 20a includes 3 polarization-sensitive units 21, and these 3 polarization-sensitive units 21 are distributed in an equilateral triangle. A honeycomb-shaped polarization-sensitive array is topologically obtained from the basic unit group 20a, and the N polarization-sensitive units 21 are evenly distributed.

[0058] The basic unit group 20a may also include 4, 5 or more polarized light sensing units 21. The 4 polarized light sensing units 21 are distributed in a rectangular shape, and the 5 polarized light sensing units 21 are distributed in a pentagonal shape. The present application does not specifically limit the number of polarized light sensing units 21 included in the basic unit group 20a. The more the number of polarized light sensing units 21 it includes, the more accurate the surface features of the occluder 4 can be recognized, and the accuracy of touch response can be improved.

[0059] Among them, the polarization angles of the M polarized light sensing units 21 are configured in an arithmetic progression, and the common difference of this arithmetic progression is 180° / M. For example, referring to Figure 2 , when M = 3, the polarization angles of the 3 polarized light sensing units 21 of the basic unit group 20a are 0°, 60° and 120° respectively; for another example, when M = 4, the polarization angles of the 4 polarized light sensing units 21 of the basic unit group 20a are 0°, 45°, 90° and 135° respectively; and so on to configure the polarization angles of the M polarized light sensing units 21.

[0060] As Figure 2 shown, the first topological unit group 20b and the second topological unit group 20c are topologically obtained radially to the right from the basic unit group 20a. The polarization angles of the 3 polarized light sensing units 21 of the first topological unit group 20b are increased by 120° one by one on the basis of the polarization angles of the 3 polarized light sensing units 21 of the basic unit group. The polarization angles of the 3 polarized light sensing units 21 of the second topological unit group 20c are increased by 60° one by one on the basis of the polarization angles of the 3 polarized light sensing units 21 of the basic unit group. Among them, the 180° polarization angle obtained after the increase can be regarded as the 0° polarization angle. Other polarized light sensing units 21 can be continuously obtained by radial topology on the basis of the topological unit group obtained by rotating the basic unit group 20a by a 60° step angle, so as to form Figure 2 the photosensitive array of 19 polarized light sensing units 21 shown. In practical applications, the topological direction can be reasonably selected according to the arrangement area of the N polarized light sensing units 21.

[0061] The present application also provides an optical touch method, and this optical touch method is applied to the optical touch module described in any of the above embodiments. As Figure 3 shown, this optical touch method includes the steps:

[0062] S100, controlling the linearly polarized light source 1 to emit linearly polarized light beam Ⅰ to the touch area.

[0063] S200, controlling the polarized light sensing component 2 to receive the reflected light beam Ⅱ corresponding to the linearly polarized light beam Ⅰ reflected by the occluder 4 in the touch area and output a corresponding detection value. Among them, the detection value represents the photosensitive intensity picked up by the corresponding polarized light sensing unit 21.

[0064] S300. Determine the moving state of the occluder 4 in the touch area according to the detection values output by multiple polarization photosensitive units 21.

[0065] S400. Output a corresponding control response according to the moving state.

[0066] This optical touch method can be controlled and executed independently by the processor 3. Alternatively, this optical touch method is controlled and executed by the controller of the touch terminal. The controller includes a processor 3, and the processor 3 is used to receive the detection values and execute the data processing process in step S300.

[0067] Among them, for the method by which the processor 3 determines the moving state of the occluder 4 according to the detection values output by multiple polarization photosensitive units 21, reference can be made to the above embodiments of the optical touch module, which will not be elaborated here. The processor 3 or the controller of the touch terminal controls the linear polarization light source 1 to emit the linear polarization light beam I, controls the polarization photosensitive component 2 to receive the reflected light beam II, and outputs a corresponding control response according to the moving state.

[0068] In some embodiments of the present application, for the above step S300, determining the moving state of the occluder in the touch area according to the detection values output by the multiple polarization photosensitive units includes:

[0069] S310. When there is no occluder 4 entering the touch area, receive the initial detection values output by each polarization photosensitive unit 21.

[0070] S320. When there is an occluder 4 entering the touch area, receive the first detection values output by each polarization photosensitive unit 21 at the first moment, and the second detection values output by each polarization photosensitive unit 21 at the second moment.

[0071] S330. Determine the initial position where the occluder 4 enters the touch area according to the initial detection values; determine the moving direction and moving speed of the occluder 4 according to the difference between the first detection values and the second detection values.

[0072] Specifically, when there is no occluder 4 entering the touch area, none of the polarization photosensitive units 21 receive the reflected light beam II, and the detection values output are the initial detection values. When there is an occluder 4 entering the touch area, some polarization photosensitive units 21 will receive the reflected light beam II, resulting in a change in the detection values they output, while the detection values output by the polarization photosensitive units 21 that do not receive the reflected light beam II are still the initial detection values.

[0073] Among them, when the polarization photosensitive unit 21 is configured to only receive the reflected light beam II, the initial detection value is 0. The processor 3 can confirm that the occluder 4 enters the area irradiated by the linearly polarized light source 1 according to the polarization photosensitive unit 21 with the initial detection value of the film. By continuously sampling within a certain period of time, the direction and speed of the occluder 4 passing through the touch area can be determined by the interpolation method.

[0074] In some embodiments of the present application, step S400 specifically includes:

[0075] S410, determining the surface characteristics of the occluder 4 according to the moving direction and moving speed of the occluder 4, and comparing the surface characteristics with the preset characteristics.

[0076] S420, if it is determined that the surface characteristics are consistent with the preset characteristics, output the control response.

[0077] Since at least three polarization photosensitive units 21 are arranged in an interleaved manner and have different polarization directions from each other, the surface characteristics of the occluder 4 can be determined based on the phase difference distribution of the polarization photosensitive units 21 with different polarization directions and the moving direction and moving speed of the occluder 4, so as to realize the recognition of the surface characteristics of the occluder 4.

[0078] Specifically, when a certain local surface feature of the occluder 4 passes through the touch area, the incident angle of the linearly polarized light I irradiated on the local surface feature changes, thereby changing the polarization direction of the reflected light beam II. The photosensitive intensity picked up by each polarization photosensitive unit 21 participating in receiving the reflected light beam II of the local surface feature will change due to the change of the polarization direction of the reflected light beam II, resulting in the change of the detected value output by it. Based on the characteristic that different objects have different polarization states, the local surface feature can be obtained through statistical and graphical modeling transformation. The local surface features at other positions can be obtained in the same way, and then the surface characteristics of the occluder 4 can be obtained through modeling and integration.

[0079] Compare the surface characteristics of the occluder 4 with the preset characteristics previously stored by the processor 3 or the controller of the touch terminal. When the detected surface characteristics are the same as the preset characteristics, it is determined that a control response needs to be given; otherwise, no touch response is given. In this way, false touches caused by non-specified occluders passing through the touch area can be prevented.

[0080] The optical touch method provided by some embodiments of the present application further includes the steps of:

[0081] S510, obtaining instruction information indicating the closing of the touch function.

[0082] S520, controlling the linearly polarized light source to turn off according to the instruction information.

[0083] Among them, the instruction information of the touch function can be generated by the user's operations on the touch terminal, such as issued through the control buttons or software programs on the touch terminal. When the processor 3 or the controller of the touch terminal receives this instruction information, it controls the closing of the linearly polarized light source 1, realizing the user's independent selection of turning on and off the touch function.

[0084] This application also proposes a touch terminal, which can be an electronic device such as a mobile phone, a tablet computer, a TV, etc. that needs to be configured with a touch function. The touch terminal includes a display panel and an optical touch module. The touch area is formed on the display side of the display panel.

[0085] Among them, the linearly polarized light source 1 and the polarization-sensitive unit 21 can be arranged at any position of the touch terminal, as long as it is satisfied that the polarization-sensitive unit 21 cannot receive the linearly polarized light beam I but can receive the reflected light beam II.

[0086] It can be understood that the touch area is the touch surface of the display panel. Since this application uses an optical reflection mechanism to achieve touch response, the occluder 4 can achieve touch operations without directly contacting the touch surface.

[0087] Optionally, the linearly polarized light source 1 and the polarization-sensitive component 2 are both arranged on one side of the edge of the touch area, for example, arranged on the edge of the touch surface and extending along the length direction of the touch surface. The N polarization-sensitive units 21 are distributed on a plane on one side of the edge of the touch surface and facing the display panel. The linearly polarized light beam I emitted by the linearly polarized light source 1 irradiates from one side of the edge of the touch surface to the other side and covers the entire touch surface.

[0088] Optionally, the linearly polarized light source 1 and the N polarization-sensitive units 21 of the polarization-sensitive component 2 are distributed on a plane on or below the touch surface. For example, the display panel is provided with an array of N openings, and the N polarization-sensitive units 21 are correspondingly arranged in the N openings. Or, the polarization-sensitive component 2 is arranged on the back side of the display panel, the display panel is provided with an array of N openings, the N openings are correspondingly arranged with the N polarization-sensitive units 21 one by one, and the optical touch module further includes N light guides correspondingly arranged in the N openings, and the reflected light beam II is introduced into the corresponding polarization-sensitive unit 21 through the light guides.

[0089] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0090] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An optical touch module, characterized in that Comprising: A linearly polarized light source for emitting a linearly polarized light beam towards the touch area; A polarization photosensitive component, including N polarization photosensitive units arranged in an array, each of the polarization photosensitive units having a polarization angle, wherein at least three of the polarization photosensitive units are staggered and have different polarization directions from each other, and each of the polarization photosensitive units is configured to receive a reflected light beam corresponding to the linearly polarized light beam reflected by an occluder within the touch area and output a corresponding detection value; A processor, connected to the polarization photosensitive component, for receiving the detection value and determining the movement state of the occluder within the touch area based on the detection value.

2. The optical touch module according to claim 1, wherein, Among the N polarization photosensitive units, there is a basic unit group, the basic unit group including M polarization photosensitive units, the M polarization photosensitive units being staggered and having different polarization directions from each other; The N polarization photosensitive units arranged in an array are topologically obtained from the basic unit group, such that the polarization photosensitive units having the same polarization angle are evenly distributed among the N polarization photosensitive units; wherein, 3 ≤ M < N.

3. The optical touch module according to claim 2, wherein The M polarization photosensitive units are adjacent to each other and are centrosymmetrically distributed.

4. The optical touch module according to claim 2, wherein The polarization angles of the M polarization photosensitive units are configured in an arithmetic progression, and the common difference of the arithmetic progression is 180° / M.

5. The optical touch module according to claim 1, wherein The linearly polarized light source and the polarization photosensitive unit have the same working wavelength, and the working wavelength is an ultra-infrared or ultra-ultraviolet wavelength.

6. An optical touch method, characterized in that, The optical touch method is applied to the optical touch module according to any one of claims 1-5, and the optical touch method includes: Controlling the linearly polarized light source to emit a linearly polarized light beam towards the touch area; Controlling the polarization photosensitive component to receive a reflected light beam corresponding to the linearly polarized light beam reflected by an occluder within the touch area and output a corresponding detection value; wherein, the detection value represents the photosensitive intensity picked up by the corresponding polarization photosensitive unit; Determining the movement state of the occluder within the touch area based on the detection values output by a plurality of the polarization photosensitive units; Outputting a corresponding control response according to the movement state.

7. The optical touch method according to claim 6, wherein The determining the movement state of the occluder within the touch area based on the detection values output by a plurality of the polarization photosensitive units includes: In the case where no occluder enters the touch area, receiving an initial detection value output by each of the polarization photosensitive units; In the case where an occluder enters the touch area, receiving a first detection value output by each of the polarization photosensitive units at a first moment and a second detection value output by each of the polarization photosensitive units at a second moment; Determining the initial position of the occluder entering the touch area based on the initial detection value, and determining the movement direction and movement speed of the occluder based on the difference between the first detection value and the second detection value.

8. The optical touch method according to claim 7, wherein, Before outputting the corresponding control response according to the movement state, further including: Determining the surface characteristics of the occluder based on the movement direction and movement speed of the occluder, and comparing the surface characteristics with preset characteristics; Determining that the surface characteristics are consistent with the preset characteristics, and then outputting the control response.

9. The optical touch method according to claim 6, wherein Further comprising: Obtaining instruction information indicating the closing of the touch function; Control the linear polarization light source to turn off according to the instruction information.

10. A touch terminal, characterized in that, Comprising: A display panel; An optical touch module, where the optical touch module is the optical touch module according to any one of claims 1-5, and the touch area is located on the display side of the display panel.

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