Touch screen and display device

Abstract

The utility model is suitable for the technical field of display equipment, and provides a touch screen and a display device. The touch screen comprises a touch outer layer, the touch outer layer is provided with a touch surface and a back surface which are oppositely arranged, and the side, away from the back surface, of the touch surface is a touch side; the touch outer layer is arranged on the mounting part; the detection light emitting part is arranged on the mounting part and is used for emitting detection light; the detection light receiving part is arranged on the mounting part and is used for receiving the detection light from the touch side; the first reflecting part is arranged on the mounting part and is provided with a total reflection plane, and the total reflection plane is used for reflecting the detection light emitted by the detection light emitting part to the touch side. In the application, the first reflecting part and the total reflection plane which are matched for use can change the propagation path of the detection light emitted by the detection light emitting part, so that the detection light originally emitted to other directions is reflected to the touch side, more areas of the touch side can receive the detection light, the coverage range of the detection light is expanded, and the detection accuracy is improved. And invalid blind areas of the touch surface are reduced.

Description

Technical Field

[0001] This application belongs to the field of display device technology, and more specifically, relates to a touch screen and display device. Background Technology

[0002] A touchscreen is a human-computer interaction device that converts touch actions into electronic signals, thereby enabling direct control of electronic devices.

[0003] In related technologies, touch screens typically use infrared touch to achieve touch operation, which is performed on the touch outer layer of the touch screen. The touch outer layer has a touch surface and a back surface that are set opposite to each other. Meanwhile, an infrared transmitter and an infrared receiver are respectively installed on opposite sides of the touch outer layer. The infrared light emitted by the infrared transmitter to the infrared receiver is located on the side of the touch surface away from the back surface.

[0004] Because the infrared light emitted by the infrared emitter has a certain range of emission angles, the infrared light is unusable outside of the emission angle range, resulting in an invalid blind area on the touch surface. Consequently, the ratio of the effective touch area to the total touch surface area, i.e., the screen ratio, will decrease. Utility Model Content

[0005] The purpose of this application is to provide a touch screen and display device, which aims to solve the technical problem that the touch surface has a certain number of ineffective blind spots in the related art.

[0006] To achieve the above objectives, according to one aspect of this application, a touch screen is provided, comprising: a touch outer layer having a touch surface and a back surface disposed opposite to each other, wherein the side of the touch surface away from the back surface is the touch side; a mounting member, wherein the touch outer layer is disposed on the mounting member; a detection light emitter disposed on the mounting member for emitting detection light; a detection light receiver disposed on the mounting member for receiving detection light from the touch side; and a first reflector disposed on the mounting member and having a total reflection plane, wherein the total reflection plane is used to reflect the detection light emitted by the detection light emitter to the touch side.

[0007] Optionally, the first reflector is a filter structure, which also has an incident surface and an emitting surface; the incident surface is located between the detection light emitting element and the total reflection plane; the emitting surface is located between the touch outer layer and the total reflection plane.

[0008] Optionally, the direction from the touch surface to the back surface is the first direction; the light-emitting surface is located on the side of the touch surface away from the back surface in the first direction, the light-incident surface is located on the side of the touch surface close to the back surface in the first direction, and the detection light emitter is located on the side of the light-incident surface away from the touch surface in the first direction; and / or, the total reflection plane is arranged to intersect with the light-incident surface and the light-emitting surface; the detection light incident on the total reflection plane through the light-incident surface is the first ray, and the detection light emitted toward the light-emitting surface after being reflected by the total reflection plane is the second ray, and the total reflection plane is used to arrange the first ray and the second ray symmetrically along the normal of the total reflection plane; and / or, the optical axis of the detection light emitter is perpendicular to the light-incident surface; and / or, the light-emitting surface is perpendicular to the light-incident surface.

[0009] Optionally, the direction from the touch surface to the back is the first direction, and the detection light emitter, the light incident surface, the light emitting surface, and the touch outer layer are arranged sequentially along the second direction, which intersects with the first direction; there are two total reflection planes, both of which are located between the light incident surface and the light emitting surface and are arranged opposite to each other along the first direction; one of the two total reflection planes is used to reflect the detection light incident through the light incident surface toward the other, and the other is used to reflect the detection light toward the light emitting surface.

[0010] Optionally, the two total internal reflection planes are parallel; and / or, the optical axis of the light emitting element is parallel to the second direction, the incident surface is perpendicular to the second direction, and the emitting surface is parallel to the incident surface; and / or, the first direction is perpendicular to the second direction.

[0011] Optionally, the direction from the touch surface to the back is the first direction, and the detection light emitter, the first reflector, and the touch outer layer are arranged sequentially along the second direction. The second direction intersects with the first direction. The light-incident surface and the light-exit surface are both the surfaces of the first reflector close to the detection light emitter. There are two total reflection planes, which are symmetrically arranged along the second direction and are both located on the side of the light-incident surface away from the touch outer layer in the second direction. One of the two total reflection planes is used to reflect the detection light incident through the light-incident surface toward the other, and the other is used to reflect the detection light toward the light-exit surface.

[0012] Optionally, the mounting component is provided with a mounting space, which has an emission outlet for the detection light to be emitted to the touch side; the first reflector is disposed in the mounting space, and there is a preset gap between the total reflection plane and the inner wall of the mounting space, through which the total reflection plane reflects the detection light to the light-emitting surface.

[0013] Optionally, the direction from the touch surface to the back surface is the first direction; the first reflector includes a filter and a reflector, and a detection light emitting element is disposed on one side of the reflector in the first direction for emitting detection light toward the reflector; the reflector is disposed on the side of the filter away from the outer layer of the touch surface in a third direction for reflecting the detection light emitted by the detection light emitting element to the filter, and the third direction is intersecting with the first direction; the filter has a light-incident surface and a light-exit surface arranged in parallel, the light-incident surface is located between the light-exit surface and the reflector, the light-incident surface is used to receive the detection light emitted through the reflector, and the light-exit surface is used to emit the detection light emitted through the light-incident surface to the touch side.

[0014] Optionally, the touch screen also includes a second reflector disposed on the mounting member. The second reflector and the first reflector are arranged symmetrically about the vertical line from the detection light emitter to the detection light receiver. The second reflector is used to reflect the detection light from the touch side to the detection light receiver.

[0015] According to another aspect of this application, a display device is provided, including the touch screen described above.

[0016] The beneficial effects of the touch screen provided in this application are as follows: In this application, the first reflector and the total reflection plane used in conjunction can change the propagation path of the detection light emitted by the detection light emitter, thereby reflecting the detection light that was originally directed in other directions to the touch side, so that more areas of the touch side can receive the detection light, thereby expanding the coverage of the detection light and reducing the ineffective blind spots of the touch surface; this not only helps to increase the screen ratio of the touch surface and provide users with a wider visual experience, but also helps to increase the effective optical density, making the touch positioning operation more accurate and effectively improving the user experience; in addition, it also helps to reduce the number of detection light emitters. Attached Figure Description

[0017] To more clearly illustrate the technical features of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a touch screen provided in an embodiment of this application;

[0020] Figure 2 A schematic diagram of the assembled structure of the touch outer layer, mounting component, light emission detection component, and first reflective component for the filter structure provided in the embodiments of this application;

[0021] Figure 3 A schematic diagram of the optical path after the touch outer layer, mounting component, detection light emitting component, and first reflective component of the filter structure are assembled according to the embodiments of this application;

[0022] Figure 4 This application provides a schematic diagram of the structure of the first reflective element, which is a filter structure, as shown in the embodiments of this application.

[0023] Figure 5 This is a schematic diagram of the structure of the mounting component provided in the embodiments of this application;

[0024] Figure 6 A schematic diagram of the structure of the detection light emitting element provided in the embodiment of this application after it is engaged with a first reflector arranged in parallel with two total internal reflection planes;

[0025] Figure 7 A schematic diagram of the structure of the detection light emitting element provided in the embodiment of this application after being combined with the first reflective element arranged symmetrically on two total internal reflection planes;

[0026] Figure 8 A schematic diagram of the assembled structure of the touch outer layer, mounting component, light emission detection component, and first reflector including filter and reflector provided in the embodiments of this application;

[0027] The details of the reference numerals used in the above figures are as follows:

[0028] 100. Outer touch layer; 110. Touch surface; 120. Back side;

[0029] 200. Mounting component; 210. Mounting space; 211. Injection port; 220. Preset gap;

[0030] 300. Inspect light-emitting components;

[0031] 400. Inspect the optical receiver;

[0032] 500, First reflector; 510, Total internal reflection plane; 520, Incident surface; 530, Exit surface; 540, Filter; 550, Reflector;

[0033] 600. Second reflector. Detailed Implementation

[0034] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific implementation methods of this application will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this application. Other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort should all fall within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] In the description of this application, it should be understood that the numbering itself, such as "first", "second", etc., is only used to distinguish the described objects and has no sequential or technical meaning, and should not be construed as specifying or implying the importance of the described objects.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In the description of this application, the term "multiple" refers to two or more. Furthermore, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the application. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] As described in the background section, a touchscreen is a human-computer interaction device that converts touch actions into electronic signals, thereby enabling direct control of electronic devices. In related technologies, touchscreens typically employ infrared touch technology for touch operation. Touch operations are performed on the outer touch layer of the touchscreen. This outer touch layer has a touch surface and a back surface positioned opposite each other. An infrared emitter and an infrared receiver are respectively mounted on opposite sides of the outer touch layer, with the infrared light emitted by the emitter to the receiver located on the touch surface away from the back surface. Because the infrared light emitted by the emitter has a limited emission angle, the infrared light is unusable outside this range. This results in ineffective blind spots on the touch surface, leading to a decrease in the ratio of the effective touch area to the total touch surface area, i.e., the screen-to-body ratio.

[0041] Reference Figures 1 to 5 To address the aforementioned problems, according to one aspect of this application, an embodiment of this application provides a touch screen, which includes a touch outer layer 100, a mounting member 200, a detection light emitter 300, a detection light receiver 400, and a first reflector 500. The touch outer layer 100 has a touch surface 110 and a back surface 120 disposed opposite to each other, with the side of the touch surface 110 away from the back surface 120 being the touch side. The touch outer layer 100 is disposed on the mounting member 200. The detection light emitter 300 is disposed on the mounting member 200 and is used to emit detection light. The detection light receiver 400 is disposed on the mounting member 200 and is used to receive detection light from the touch side. The first reflector 500 is disposed on the mounting member 200 and has a total reflection plane 510, which is used to reflect the detection light emitted by the detection light emitter 300 to the touch side.

[0042] In this embodiment, the touchscreen is used in conjunction with a touch input component, which is typically a user's finger, stylus, or other tool for touch operation. The outer touch layer 100 is a cover glass and is fixedly mounted on the mounting member 200; it is understood that the outer touch layer 100 may also be made of plastic, ceramic, metal, or other composite materials, depending on actual needs. The mounting member 200 is a mounting frame that surrounds the outer touch layer 100.

[0043] The detection light emitter 300 is typically an infrared plate with an infrared emitter, and the detection light receiver 400 is an infrared plate with an infrared receiver. The infrared light is formed as the detection light. Specifically, the infrared emitter continuously emits infrared light to the infrared receiver. When an object (such as a finger) blocks the infrared light, the infrared receiver cannot receive it. At this time, the infrared receiver will feed back a corresponding electrical signal to the control component of the touch screen to determine the touch position. It is understood that the detection light can also be a laser or other light that can be used to detect touch operations. In this case, the specific structure of the detection light emitter 300 and the detection light receiver 400 can be determined according to the actual detection requirements, and no specific restrictions are imposed here. Simultaneously, the detection light emitter 300 and the detection light receiver 400 are respectively arranged on opposite sides of the touch screen along the length or width direction. It is understood that the detection light emitter 300 and the detection light receiver 400 can also both be arranged on the same side of the touch screen in the length or width direction, and spaced apart along the width or length direction of the touch screen.

[0044] The first reflector 500 is mounted on the mounting component 200. The total reflection plane 510 can be formed by physical processing methods such as cutting and grinding; it can also be formed by coating methods, such as coating multiple layers of dielectric films with different refractive indices on the surface of the first reflector 500 by physical vapor deposition, chemical vapor deposition and other coating technologies; or by directly coating a layer of metal film on the surface of the first reflector 500; it can also be formed by photolithography or etching technology.

[0045] In this application, the first reflector 500 and the total reflection plane 510 used in conjunction can change the propagation path of the detection light emitted by the detection light emitter 300, thereby reflecting the detection light that was originally directed in other directions to the touch side, so that more areas of the touch side can receive the detection light, thereby expanding the coverage of the detection light and reducing the ineffective blind spots of the touch surface 110. This not only helps to increase the screen ratio of the touch surface 110 and provide users with a wider visual experience, but also helps to increase the effective optical density, making the touch positioning operation more accurate and effectively improving the user experience. In addition, it also helps to reduce the number of detection light emitters 300.

[0046] Reference Figures 1 to 5 In one embodiment, the first reflector 500 is a filter structure, which further has an incident surface 520 and an exit surface 530. The incident surface 520 is located between the detection light emitter 300 and the total reflection plane 510, and is used to allow the detection light emitted by the detection light emitter 300 to enter the total reflection plane 510. The exit surface 530 is located between the touch outer layer 100 and the total reflection plane 510, and is used to allow the detection light reflected by the total reflection plane 510 to exit to the touch side.

[0047] In this embodiment, the filter structure is a filter strip; the light-incident surface 520 and the light-exit surface 530 are two spaced planes on the filter structure.

[0048] The light-incident surface 520 allows the detection light emitted by the detection light emitter 300 to accurately enter the total internal reflection plane 510, while the light-exit surface 530 allows the detection light reflected from the total internal reflection plane 510 to accurately exit onto the touch side. This structural design not only makes the detection light propagation path more precise, helping the detection light to uniformly and comprehensively cover the touch side, reducing or even eliminating touch blind spots, and improving the overall optical performance of the touch screen, but also allows for better management of the detection light during propagation, reducing light scattering and loss.

[0049] As a filter structure, the first reflector 500 can also filter the detection light, filtering out stray light or interfering light from the ambient light that has a different wavelength from the detection light. This helps to reduce the influence of ambient light on touch detection and improve the accuracy of detection.

[0050] Furthermore, integrating both the light filtering and reflection functions into a single component helps simplify the overall structure of the touchscreen and reduces production costs and assembly difficulty.

[0051] Reference Figures 1 to 5 In one embodiment, the direction from the touch surface 110 to the back surface 120 is a first direction; the light-emitting surface 530 is located on the side of the touch surface 110 away from the back surface 120 in the first direction, the light-incident surface 520 is located on the side of the touch surface 110 close to the back surface 120 in the first direction, and the detection light emitter 300 is located on the side of the light-incident surface 520 away from the touch surface 110 in the first direction.

[0052] In this embodiment, the first direction is parallel to the thickness direction of the touch outer layer 100. The first direction can refer to the positive direction or the negative direction. The first direction shown in the figure is only an illustration. The light-emitting surface 530 is in contact with the touch surface 110 near the edge of the touch surface 110. The light-incident surface 520 is located on the side of the back surface 120 away from the touch surface 110 in the first direction. It can be understood that the light-incident surface 520 can also be located between the touch surface 110 and the back surface 120. The detection light emitter 300 is located on the side of the light-incident surface 520 away from the back surface 120 in the first direction.

[0053] On the one hand, the light-emitting surface 530 is positioned on the side of the touch surface 110 away from the back surface 120, which allows the detection light reflected by the total internal reflection plane 510 to be directed more directly to the touch side, reducing light loss and scattering during transmission, improving the efficiency of the detection light reaching the touch side, and enhancing the accuracy of touch detection. Simultaneously, the light-incident surface 520 is positioned close to the back surface 120, and the detection light emitter 300 is located on the side of the light-incident surface 520 away from the touch surface 110. This arrangement allows the detection light emitted by the detection light emitter 300 to pass more smoothly through the light-incident surface 520 and onto the total internal reflection plane 510, ensuring the stability and efficiency of the detection light propagation.

[0054] On the other hand, the components are arranged in an orderly manner in the first direction, making full use of the space of the touch screen and reducing the waste of space between components. This allows the touch screen to achieve more functions in a limited space and helps to realize the compact structural design of the touch screen.

[0055] Reference Figures 1 to 5 In one embodiment, the total internal reflection plane 510 is arranged to intersect with the light incident plane 520 and the light exiting plane 530; the detection light incident on the total internal reflection plane 510 through the light incident plane 520 is the first ray, and the detection light emitted towards the light exiting plane 530 after being reflected by the total internal reflection plane 510 is the second ray. The total internal reflection plane 510 is used to arrange the first ray and the second ray symmetrically along the normal of the total internal reflection plane 510.

[0056] In this embodiment, the total internal reflection plane 510 has an acute angle with the incident light plane 520, and also has an acute angle with the light emitting plane 530.

[0057] The aforementioned structural design not only ensures that the detection light propagates along the designed path, allowing it to accurately reach the target position on the touch side after passing through the incident surface 520, the total internal reflection plane 510, and the exit surface 530, thus improving the accuracy and predictability of the detection light propagation and achieving precise touch detection, but also makes the detection light distribution more uniform after exiting the exit surface 530, thereby improving the uniformity of the detection light propagating to the touch side. Furthermore, it reduces the loss of detection light during reflection, allowing more detection light to effectively exit from the exit surface 530 to the touch side, helping to enhance the intensity of the detection light reaching the touch side and achieving more precise touch detection.

[0058] Reference Figures 1 to 5In one embodiment, the optical axis of the detection light emitter 300 is perpendicular to the light incident surface 520. In this embodiment, the optical axis of the detection light emitter 300 is a virtual axis located at the centerline of the detection light emitted by the detection light emitter 300, which is collinear with the axis of the infrared emitting tube; the optical axis of the detection light emitter 300 is parallel to the first direction, and the light incident surface 520 is parallel to the touch surface 110.

[0059] The optical axis of the detection light emitter 300 is perpendicular to the incident light surface 520, which not only ensures that the detection light is incident in a direction perpendicular to the incident light surface 520, but also minimizes the reflection and refraction loss of the detection light during the incident process, allowing more detection light to be successfully incident on the total reflection plane 510.

[0060] At the same time, combined with the symmetrical reflection effect of the total reflection plane 510, more detection light can be reflected along the predetermined symmetrical path, which helps to improve the reflection efficiency of the detection light in the total reflection plane 510, allowing more detection light to be emitted from the light-emitting surface 530, thereby enhancing the intensity of the detection light that finally reaches the touch side and improving the sensitivity and accuracy of detection.

[0061] Reference Figures 1 to 5 In one embodiment, the light-emitting surface 530 is perpendicular to the light-receiving surface 520. In this embodiment, the light-emitting surface 530 is perpendicular to the touch surface 110.

[0062] The perpendicularity between the light-emitting surface 530 and the light-incident surface 520 not only ensures that the detection light reflected by the total internal reflection plane 510 is emitted from the light-emitting surface 530 to the touch side at a specific angle, but also accurately guides the detection light to the touch area that needs to be detected, reduces the scattering and deflection of the detection light, improves the utilization efficiency of the detection light, and ensures the accuracy of touch detection.

[0063] Simultaneously, combined with the symmetrical reflection effect of the total internal reflection plane 510, the detection light entering from the light-incident surface 520 can be emitted more concentratedly from the light-out surface 530 after being symmetrically reflected by the total internal reflection plane 510. This helps to reduce the scattering and loss of the detection light during propagation, improve the collection efficiency of the detection light, and enhance the intensity of the detection light.

[0064] Reference Figures 1 to 5In one specific embodiment, the optical axis of the light emitting element 300 is parallel to a first direction. The light-incident surface 520 is located on the side of the back surface 120 away from the touch surface 110 in the first direction, and the light-incident surface 520 is parallel to the touch surface 110. The light-emitting surface 530 is located on the side of the touch surface 110 away from the back surface 120 in the first direction, and the light-emitting surface 530 is perpendicular to the touch surface 110. Simultaneously, the angle between the total internal reflection plane 510 and the light-incident surface 520 is 45°, and the angle between the total internal reflection plane 510 and the light-emitting surface 530 is also 45°. It can be understood that the angle between the total internal reflection plane 510 and the light-incident surface 520 is an acute angle, and the angle between the total internal reflection plane 510 and the light-emitting surface 530 is also an acute angle. The sum of the angles between the total internal reflection plane 510 and the light-incident surface 520 and the total internal reflection plane 510 and the light-emitting surface 530 is 90°.

[0065] Reference Figure 1 and Figure 6 In one embodiment, the direction from the touch surface 110 to the back surface 120 is the first direction. The detection light emitter 300, the light-incident surface 520, the light-emitting surface 530, and the touch outer layer 100 are arranged sequentially along the second direction, which intersects with the first direction. There are two total reflection planes 510, both of which are located between the light-incident surface 520 and the light-emitting surface 530 and are arranged opposite to each other along the first direction. One of the two total reflection planes 510 is used to reflect the detection light incident through the light-incident surface 520 toward the other, and the other is used to reflect the detection light toward the light-emitting surface 530.

[0066] In this embodiment, the second direction is parallel to the length or width direction of the touch screen. The second direction can refer to the positive direction or the negative direction of the second direction. The second direction shown in the figure is only an illustration. There is an angle greater than 0° between the first direction and the second direction. The detection light emitter 300 emits detection light toward the total reflection plane 510 closest to the detection light emitter 300 among the two total reflection planes 510.

[0067] After the detection light enters from the incident surface 520, it is first reflected by one total internal reflection plane 510 to another total internal reflection plane 510, and then reflected by the latter to the exit surface 530. The two total internal reflection planes 510 enable the detection light to undergo multiple reflections. This multiple reflection process not only extends the propagation path of the detection light, allowing more areas on the touch side to receive the detection light and expanding the coverage of the detection light, but also enables more precise control of the detection light, allowing it to propagate along a specific path, thereby better meeting the requirements of the optical system for the direction and distribution of the detection light.

[0068] The two total internal reflection planes 510 are arranged opposite each other, which can more effectively collect and guide the detection light entering from the light-incident surface 520 to the light-exiting surface 530, so that more detection light is reflected and emitted from the light-exiting surface 530, reducing the loss of detection light in the system and improving the emission efficiency of detection light.

[0069] Furthermore, placing the two total reflection planes 510 between the light-incident surface 520 and the light-exit surface 530 not only enables a more compact structural design while ensuring optical performance, but also reduces manufacturing difficulty and cost.

[0070] Reference Figure 6 In one embodiment, the two total internal reflection planes 510 are parallel. The two parallel total internal reflection planes 510 help to improve the uniformity of the optical system; the detection light is uniformly reflected and propagated between the two parallel total internal reflection planes 510, avoiding the phenomenon of detection light being concentrated in certain areas, so that the detection light emitted from the light emitting surface 530 is more uniform in intensity and distribution.

[0071] Reference Figure 6 In one embodiment, the optical axis of the light emitting element 300 is parallel to the second direction, the light incident surface 520 is perpendicular to the second direction, and the light emitting surface 530 is parallel to the light incident surface 520.

[0072] In this embodiment, the light-incident surface 520 is perpendicular to the touch surface 110, and the light-emitting surface 530 is perpendicular to the touch surface 110. The optical axis of the detection light emitting element 300 is parallel to the second direction, while the light-incident surface 520 is perpendicular to the second direction. This allows the detection light to enter the first reflector 500 in a perpendicular manner. This perpendicular incidence method enables efficient coupling between the detection light and the first reflector 500, reduces reflection loss of the detection light at the light-incident surface 520, and improves the utilization rate of the detection light.

[0073] Meanwhile, the light-emitting surface 530 is parallel to the light-incident surface 520. Combined with the arrangement of the two total internal reflection planes 510, a stable channel is provided for the propagation of the detection light within the first reflector 500. When the detection light is reflected between the two total internal reflection planes 510, the propagation direction of the detection light can be better controlled due to the parallel relationship between the light-incident surface 520 and the light-emitting surface 530. The detection light will not deviate from the direction of the light-emitting surface 530 during propagation, ensuring that the detection light can be stably emitted from the light-emitting surface 530.

[0074] Reference Figure 6In one embodiment, the first direction is perpendicular to the second direction. This perpendicularity allows the incident angle of the detection light on the total internal reflection plane 510 to be closer to the ideal total internal reflection angle, thereby improving the efficiency of total internal reflection, reducing energy loss of the detection light during reflection, and ensuring that sufficient intensity of detection light ultimately exits from the light-emitting surface 530. Furthermore, the design of the first direction being perpendicular to the second direction is relatively simple, facilitating the design and manufacturing of the first reflector 500.

[0075] Reference Figure 1 and Figure 7 In one embodiment, the direction from the touch surface 110 to the back surface 120 is the first direction. The detection light emitter 300, the first reflector 500, and the touch outer layer 100 are arranged sequentially along the second direction, which intersects with the first direction. The light-incident surface 520 and the light-exiting surface 530 are both surfaces of the first reflector 500 close to the detection light emitter 300. There are two total reflection planes 510, which are symmetrically arranged along the second direction and are both located on the side of the light-incident surface 520 away from the touch outer layer 100 in the second direction. One of the two total reflection planes 510 is used to reflect the detection light incident through the light-incident surface 520 toward the other, and the other is used to reflect the detection light toward the light-exiting surface 530.

[0076] In this embodiment, the second direction is parallel to the length or width direction of the touch screen and perpendicular to the first direction. The second direction can refer to the positive direction or the negative direction of the second direction; the second direction shown in the accompanying drawings is only an illustration. After the detection light enters from the light-incident surface 520, it is first reflected by one total internal reflection plane 510 to another total internal reflection plane 510, and then reflected by the latter to the light-out surface 530. The two total internal reflection planes 510 enable the detection light to undergo multiple reflections. This multiple reflection process not only extends the propagation path of the detection light, allowing more areas on the touch side to receive the detection light and expanding the coverage of the detection light, but also allows for more precise control of the detection light, enabling it to propagate along a specific path, thereby better meeting the requirements of the optical system for the direction and distribution of the detection light.

[0077] The symmetrical arrangement of the two total reflection planes 510 helps to achieve a more uniform distribution of detection light. The symmetrical arrangement ensures that the detection light will not be biased to one side during its propagation between the two total reflection planes 510. The detection light can be reflected and propagated uniformly between the two total reflection planes 510, and can also achieve a more uniform distribution when it is emitted from the light-emitting surface 530, thereby improving the utilization efficiency and quality of the detection light.

[0078] Reference Figure 7In one embodiment, the optical axis of the light emitting element 300 is parallel to the second direction, and the incident surface 520 is perpendicular to the second direction.

[0079] In this embodiment, the light-incident surface 520 is perpendicular to the touch surface 110, and the light-emitting surface 530 is perpendicular to the touch surface 110. The optical axis of the detection light emitting element 300 is parallel to the second direction, while the light-incident surface 520 is perpendicular to the second direction. This allows the detection light to enter the first reflector 500 in a perpendicular manner. This perpendicular incidence method enables efficient coupling between the detection light and the first reflector 500, reduces reflection loss of the detection light at the light-incident surface 520, and improves the utilization rate of the detection light.

[0080] Meanwhile, the light-emitting surface 530 is parallel to the light-incident surface 520. Combined with the arrangement of the two total internal reflection planes 510, a stable channel is provided for the propagation of the detection light within the first reflector 500. When the detection light is reflected between the two total internal reflection planes 510, the propagation direction of the detection light can be better controlled due to the parallel relationship between the light-incident surface 520 and the light-emitting surface 530. The detection light will not deviate from the direction of the light-emitting surface 530 during propagation, ensuring that the detection light can be stably emitted from the light-emitting surface 530.

[0081] Reference Figures 1 to 7 In one embodiment, the mounting member 200 is provided with a mounting space 210, which has an emission outlet 211 for the detection light to be emitted to the touch side; the first reflector 500 is disposed in the mounting space 210, and there is a preset gap 220 between the total reflection plane 510 and the inner wall surface of the mounting space 210, through which the total reflection plane 510 reflects the detection light to the light-emitting surface 530.

[0082] In this embodiment, the installation space 210 is a mounting groove, mounting hole, or installation area. The light-emitting surface 530 is located inside the emission outlet 211 and can completely seal the emission outlet 211 to prevent external dust from entering the installation space 210 through the emission outlet 211.

[0083] The preset gap 220 allows the detection light to be emitted from the first reflector 500 in the optically denser medium to the air in the optically less dense medium. When the incident angle of the detection light is greater than the critical angle at the interface between the first reflector 500 and the air, i.e., the total reflection plane 510, the detection light will undergo total reflection at that interface. After total reflection, the detection light will continue to propagate within the first reflector 500 and will eventually be emitted from the light-emitting surface 530 to the touch side.

[0084] The presence of the preset gap 220 creates an interface between the optically dense medium (first reflector 500) and the optically sparse medium (air), thereby enabling the total reflection plane 510 to meet the total reflection condition. This causes more detection light to undergo total reflection at the total reflection plane 510, reducing the transmission of detection light to other undesired directions such as the inner wall of the installation space 210, reducing the loss of detection light energy, and ensuring that the detection light can be transmitted to the light-emitting surface 530 with a high intensity. This effectively improves the utilization efficiency and detection sensitivity of the detection light.

[0085] In addition, the preset gap 220 not only provides sufficient space for the installation of the first reflector 500, helping to accurately place it within the installation space 210, thus reducing installation difficulty and improving assembly efficiency and accuracy, but also acts as a buffer, reducing the impact of vibration, thermal expansion, and other factors on the first reflector 500 and the total reflection plane 510. Furthermore, it serves as a heat dissipation channel, helping to dissipate the heat generated by the first reflector 500 and other components during operation.

[0086] Reference Figure 8 In one embodiment, the direction from the touch surface 110 to the back surface 120 is a first direction; the first reflector 500 includes a filter 540 and a reflector 550, and a detection light emitter 300 is disposed on one side of the reflector 550 in the first direction for emitting detection light toward the reflector 550; the reflector 550 is disposed on the side of the filter 540 away from the touch outer layer 100 in a third direction for reflecting the detection light emitted by the detection light emitter 300 to the filter 540, and the third direction is intersecting with the first direction; the filter 540 has a parallel light-incident surface 520 and a light-exit surface 530, the light-incident surface 520 is located between the light-exit surface 530 and the reflector 550, the light-incident surface 520 is used to receive the detection light emitted through the reflector 550, and the light-exit surface 530 is used to emit the detection light emitted through the light-incident surface 520 to the touch side.

[0087] In this embodiment, the mounting component 200 has a mounting space 210, and the first reflector 500 and the detection light emitter 300 are both disposed within the mounting space 210; the reflector 550 is a mirror, and the angle between the normal of the reflector 550 and the first direction is 45°; the detection light emitter 300 is located on the side of the reflector 550 closer to the touch outer layer 100 in the first direction, and the angle between the optical axis of the detection light emitter 300 and the normal of the reflector 550 is 45°; the third direction is parallel to the width or length direction of the touch screen and perpendicular to the first direction. The third direction can refer to the positive direction of the third direction or the negative direction of the third direction. The third direction indicated in the figure is only an illustration. It is understandable that the angle between the normal of the reflector 550 and the first direction can be any other acute angle, and the angle between the optical axis of the detection light emitter 300 and the normal of the reflector 550 can also be any other acute angle. At the same time, the sum of the angle between the normal of the reflector 550 and the first direction and the angle between the optical axis of the detection light emitter 300 and the normal of the reflector 550 is 90°.

[0088] The filter 540 is a filter strip, and the installation space 210 has an emission outlet 211 for the detection light to be emitted to the touch side. The light-emitting surface 530 is located inside the emission outlet 211 and can completely seal the emission outlet 211 to prevent external dust from entering the installation space 210 through the emission outlet 211.

[0089] On the one hand, by placing the detection light emitter 300 on one side of the reflector 550, and by arranging the reflector 550 and the filter 540 in the designed direction, the detection light can be reflected from the detection light emitter 300 through the reflector 550 to the filter 540, and then emitted from the light-emitting surface 530 of the filter 540 to the touch side, ensuring that the detection light accurately reaches the touch area to be detected, thereby improving the accuracy and reliability of the detection.

[0090] On the other hand, the filter 540 can filter and optimize the detection light, select detection light of a specific wavelength or frequency, eliminate interference from other stray light, and make the detection light that is finally directed to the touch side have higher purity and stability, which helps to improve the quality of the detection signal and thus improve the accuracy and sensitivity of touch detection.

[0091] On the other hand, dividing the first reflector 500 into a filter 540 and a reflector 550 helps to reduce the manufacturing difficulty of the first reflector 500.

[0092] Reference Figure 1In one embodiment, the touch screen further includes a second reflector 600, which is disposed on the mounting member 200. The second reflector 600 and the first reflector 500 are arranged symmetrically about the vertical line from the detection light emitter 300 to the detection light receiver 400. The second reflector 600 is used to reflect the detection light from the touch side to the detection light receiver 400.

[0093] In this embodiment, the structure of the second reflector 600 is the same as that of the first reflector 500. The second reflector 600 can more effectively reflect the detection light from the touch side to the detection light receiver 400, enabling the detection light receiver 400 to more accurately receive changes in the light signal related to the touch operation. This not only helps to more accurately analyze information such as touch position and touch force, thereby improving the touch positioning accuracy of the touch screen, reducing accidental touches and positioning deviations, and providing users with a more precise touch operation experience, but also helps to reduce the number of detection light receivers 400.

[0094] Reference Figures 1 to 8 According to another aspect of this application, embodiments of this application also provide a display device, which includes the touch screen described above.

[0095] In this application embodiment, the display device can be any product or component with display function, such as a liquid crystal display panel, electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. This application embodiment does not limit the specific structure of the display device. Of course, the touch screen provided in this application embodiment can also be used independently without being used in the display device, and this application embodiment does not limit this use.

[0096] In summary, implementing the touch screen and display device provided in this embodiment has at least the following beneficial technical effects: In this application, the first reflector 500 and the total reflection plane 510 used in conjunction can change the propagation path of the detection light emitted by the detection light emitter 300, thereby reflecting the detection light originally directed in other directions to the touch side, so that more areas of the touch side can receive the detection light, thereby expanding the coverage of the detection light and reducing the ineffective blind area of ​​the touch surface 110; this not only helps to increase the screen ratio of the touch surface 110 and provide users with a wider visual experience, but also helps to increase the effective optical density, making the touch positioning operation more accurate and effectively improving the user experience; in addition, it also helps to reduce the number of detection light emitters 300.

[0097] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. It should be noted that, for those skilled in the art, several equivalent obvious modifications and / or equivalent substitutions can be made without departing from the technical principles of this application, and these obvious modifications and / or equivalent substitutions should also be considered within the scope of protection of this application.

Claims

1. A touch screen, characterized in that, The application relates to a touch control outer layer (100) having a touch control surface (110) and a back surface (120) arranged oppositely, wherein the touch control surface (110) is located on the side far from the back surface (120); a mounting member (200) for arranging the touch control outer layer (100); a detection light emitting member (300) arranged on the mounting member (200) for emitting detection light; a detection light receiving member (400) arranged on the mounting member (200) for receiving the detection light from the touch control surface (110); and a first reflection member (500) arranged on the mounting member (200) and having a total reflection plane (510) for reflecting the detection light emitted by the detection light emitting member (300) to the touch control surface (110). The first reflection member (500) is a light filtering structure, and the light filtering structure further has an incident light surface (520) and an emergent light surface (530). The incident light surface (520) is located between the detection light emitting member (300) and the total reflection plane (510). The emergent light surface (530) is located between the touch control outer layer (100) and the total reflection plane (510). The direction from the touch control surface (110) to the back surface (120) is a first direction. The emergent light surface (530) is located on the side of the touch control surface (110) far from the back surface (120) in the first direction, the incident light surface (520) is located on the side of the touch control surface (110) close to the back surface (120) in the first direction, and the detection light emitting member (300) is located on the side of the incident light surface (520) far from the touch control surface (110) in the first direction.

2. The touch screen of claim 1, wherein, The total reflection plane (510) is arranged to intersect the incident light surface (520) and the emergent light surface (530). The detection light emitted to the total reflection plane (510) through the incident light surface (520) is first light, and the detection light emitted to the emergent light surface (530) after being reflected by the total reflection plane (510) is second light. The total reflection plane (510) is arranged to make the first light and the second light symmetrically arranged along the normal line of the total reflection plane (510).

3. The touch screen of claim 2, wherein, The optical axis of the detection light emitting member (300) is perpendicular to the incident light surface (520). The emergent light surface (530) is perpendicular to the incident light surface (520). The direction from the touch control surface (110) to the back surface (120) is a first direction, and the detection light emitting member (300), the incident light surface (520), the emergent light surface (530) and the touch control outer layer (100) are sequentially arranged along a second direction intersecting the first direction. The number of the total reflection planes (510) is two, and the two total reflection planes (510) are arranged oppositely along the first direction between the incident light surface (520) and the emergent light surface (530). ​ 4. The touch screen of claim 2, wherein, ​ ​ One of the two total reflection planes (510) is used to reflect the detection light incident through the light-in surface (520) towards the other, and the other is used to reflect the detection light towards the light-out surface (530).

5. The touch screen of claim 4, wherein, The two total reflection planes (510) are parallel to each other; and / or, The optical axis of the detection light emitter (300) is parallel to the second direction, the light-in surface (520) is perpendicular to the second direction, and the light-out surface (530) is parallel to the light-in surface (520); and / or, The first direction is perpendicular to the second direction. 6.The touch screen of claim 2, wherein, The direction from the touch surface (110) to the back surface (120) is a first direction, the detection light emitter (300), the first reflection member (500), and the touch outer layer (100) are sequentially arranged along a second direction, the second direction is arranged to intersect the first direction, and the light-in surface (520) and the light-out surface (530) are both surfaces of the first reflection member (500) close to the detection light emitter (300); The number of total reflection planes (510) is two, the two total reflection planes (510) are symmetrically arranged along a second direction, and are both located on a side of the light-in surface (520) away from the touch outer layer (100) in the second direction, one of the two total reflection planes (510) is used to reflect the detection light incident through the light-in surface (520) towards the other, and the other is used to reflect the detection light towards the light-out surface (530).

7. The touch screen of claim 2, wherein, The mounting member (200) is provided with a mounting space (210) having an emission port (211) for the detection light to emit to the touch side; The first reflection member (500) is arranged in the mounting space (210), and the total reflection plane (510) has a preset gap (220) with the inner wall surface of the mounting space (210), and the total reflection plane (510) reflects the detection light to the light-out surface (530) through the preset gap (220).

8. The touch screen of claim 1, wherein, The direction from the touch surface (110) to the back surface (120) is a first direction; The first reflection member (500) includes a light filter (540) and a reflector (550), the detection light emitter (300) is arranged on a side of the reflector (550) in the first direction, and is used to emit the detection light towards the reflector (550); The reflector (550) is arranged on a side of the light filter (540) away from the touch outer layer (100) in a third direction, and is used to reflect the detection light emitted by the detection light emitter (300) to the light filter (540), and the third direction is arranged to intersect the first direction; The reflector (550) is arranged on a side of the light filter (540) away from the touch outer layer (100) in a third direction, and is used to reflect the detection light emitted by the detection light emitter (300) to the light filter (540), and the third direction is arranged to intersect the first direction; The light filter (540) has a light entrance surface (520) and a light exit surface (530) arranged in parallel, the light entrance surface (520) is located between the light exit surface (530) and the reflector (550), the light entrance surface (520) is used for receiving the detection light emitted by the reflector (550), and the light exit surface (530) is used for emitting the detection light incident from the light entrance surface (520) to the touch side.

9. The touch screen according to any one of claims 1 to 8, wherein, The touch screen further comprises a second reflector (600) arranged on the mounting member (200), the second reflector (600) and the first reflector (500) are symmetrically arranged with the second reflector (600) as an axis of symmetry of a median line from the detection light emitter (300) to the detection light receiver (400), and the second reflector (600) is used for reflecting the detection light of the touch side to the detection light receiver (400).

10. A display device, characterized by comprising: The touch screen comprises the touch screen according to any one of claims 1 to 9.

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