WO2021027587A1

WO2021027587A1 - Light guide apparatus and touch display apparatus

Info

Publication number: WO2021027587A1
Application number: PCT/CN2020/105911
Authority: WO
Inventors: 陈玉香
Original assignee: 广州创知科技有限公司
Priority date: 2019-08-09
Filing date: 2020-07-30
Publication date: 2021-02-18
Also published as: CN210515257U

Abstract

A light guide apparatus and a touch display apparatus, relating to the field of touch display. The light guide apparatus comprises: a first light guide portion (10) and a second light guide portion (20), wherein the first light guide portion (10) is provided with a first surface (11) and a second surface (12); the second light guide portion (20) is provided with a third surface (21) and a fourth surface (22); the second surface (12) is opposite the third surface (21), and there is an included angle β of inclination between the second surface (12) and the third surface (21), so as to control the height of the trajectory of touch sensing light to a touch surface to not be excessively high, thereby improving the touch precision.

Description

Light guide device and touch display device

This application claims the priority of the patent application filed to the State Intellectual Property Office of China on August 9, 2019 with the application number 201921300988.8 and the invention title "Light Guide Device and Touch Display Device".

Technical field

This application relates to the field of touch display, in particular to a light guide device and a touch display device.

Background technique

The application of infrared touch screen is more common. One side of the screen emits infrared light of a specific spectrum, and the other side receives infrared light signals. Because the receiving end has a wider response spectrum, in order to avoid interference from ambient light, filter lenses are usually used. Filter unfavorable frequency signals in the environment. The light entrance surface and light exit surface of the filter lens are parallel. At the same time, the light entrance surface of the receiving side and the light exit surface of the emission side have a certain angle with the touch plane, which is mainly used to reflect the secondary reflection signal of the incident surface out of the touch plane to avoid signals interference. In addition, from the perspective of improving manufacturing efficiency, the filter lenses on the entrance and exit sides use the same material and the same manufacturing mold. Through the light path analysis, in order to reflect the interference signal, the parallel plane will raise the initial infrared light emitted by the infrared lamp, so that the height of the touch plane will be raised, and then when the user uses touch, there will be a touch response when the user does not touch the screen. At the same time, there is a touch response when the pen is lifted at the end of writing. This jet lag response will affect the user experience.

Summary of the invention

The purpose of this application is to solve the shortcomings of the prior art and provide a light guide device and a touch display device to control the height of the trajectory of the touch-sensitive light emitted.

The technical scheme is as follows:

The light guide device includes a first light guide portion and a second light guide portion. The first light guide portion has a first surface and a second surface. The second light guide portion has a third surface and a fourth surface. The three surfaces are opposite, and there is an inclined angle between the second surface and the third surface.

The inclination angle is 12 degrees to 40 degrees.

The first surface is parallel to the second surface, and the third surface is parallel to the fourth surface.

The side of the first light guide part is connected to the side of the second light guide part to form a V-shape, and the connection between the first light guide part and the second light guide part is a connecting part.

The outer side of the connecting portion has a tail plane, and the tail plane extends from the side of the first light guide portion to the side of the second light guide portion.

A connecting strip is also included, and the connecting strip is connected with the connecting portion.

It also includes a fixing strip connected to the connecting strip, and the fixing strip is located in the opposite direction of the V-shaped opening.

The fixing strip is offset to the side with respect to the center line of the V-shaped opening.

The dimension of the side of the fixing bar away from the opening of the V-shape is larger than the dimension of the side of the fixing strip close to the opening of the V-shape.

The thickness of the first light guide portion and the second light guide portion are equal.

The touch display device includes a display module, a frame, a touch sensor lamp, and the light guide device of any preceding claim. The display module is installed on the frame, and the touch sensor lamp is installed on the side of the display module and is located On the outside of the display module, the light guide device corresponds to the touch sensor lamp.

The center line between the second surface and the third surface is perpendicular to the axis of the touch sensor lamp.

The opening between the first light guide portion and the second light guide portion faces the outer surface of the display module.

The frame includes a first side and a second side correspondingly arranged. The touch sensor lamp and the light guide device are provided at the first side and the second side. The first side, the first side The second light guide parts mounted on the two light guide devices on the two sides are opposite.

The first light guide portions of the two light guide devices located on the first side and the second side have opposite inclination directions with respect to the central axis between the first side and the second side; The second light guide portions of the two light guide devices on the side and the second side also have opposite inclination directions with respect to the central axis between the first side and the second side.

It should be noted:

The aforementioned "first, second, third..." does not represent a specific number and order, but is only used to distinguish names.

The thickness refers to the vertical distance between the first plane and the second plane, and the third plane and the fourth plane.

The advantages or principles of this application are described below:

1. The first light guide part and the second light guide part included in the light guide device are used for the transmission of touch-sensitive light. Due to the different propagation speeds of light in the two media, the touch-sensitive light will occur after entering the two different media. Refraction, where the touch-sensitive light enters from the first surface of the first light guide, the touch-sensitive light is refracted, enters the inside of the first light guide, and then exits from the second surface. At this time, when the touch-sensitive light is emitted again Refraction occurs. At this time, the height of the trajectory of the incoming touch sensing light and the exiting touch sensing light is changed; then the touch sensing light enters from the third surface of the second light guide part, and the touch sensing light is refracted and enters the second guide In the light part, the touch-sensitive light then exits from the fourth surface, and at the same time it is refracted. As a result, the height of the touch-sensitive light trajectory that the touch-sensitive light enters and exits from the second light guide portion changes. There is an inclined angle on the surface, so after the touch-sensitive light passes through the first light guide, the height of the touch-sensitive light track changes due to refraction. After passing through the second light guide, the height of the touch-sensitive light track is reversed. Therefore, the height deviation of the touch-sensitive light track after passing through the first light guide part and the second light guide part can cancel each other out, so the height difference between the trajectory emitted by the touch-sensitive light and the trajectory incident on it can be controlled to avoid offset is too big.

2. If the incident angle is too large, it is easy to cause the touch-sensitive light to dissipate, and if the inclination angle is too large, the component force against the pressure is small when pressure is applied, so it is easy to cause the compressive strength of the light guide device to decrease; If the inclination angle is too small, after the ambient light passes through the second light guide, the reflection angle formed between the second surface and the third surface is too small, and the ambient light will be repeatedly reflected between the second surface and the third surface Therefore, the ambient light passing through the first light guide part will increase accordingly. Therefore, controlling the tilt angle within the range of 12 to 40 degrees can increase the number of ambient light reflections. After reflection, the second surface and the second surface are quickly emitted. Three surfaces. In addition, since the touch-sensitive light emitted by the touch-sensitive lamp is relatively strong, the loss of the touch-sensitive light passing through the light guide device is relatively small.

3. Since the first surface is parallel to the second surface, after the touch-sensitive light enters the first light guide part, the angular offset formed by the two successive refractions is exactly the opposite, so they can cancel each other out, which ultimately leads to When it enters the first light guide part and when it exits the first light guide part, the touch-sensitive light is parallel. Similarly, since the third surface is parallel to the fourth surface, the touch-sensitive light trajectory of the second light guide part emits When it enters the second light guide part and when it exits the second light guide part, it is parallel. Therefore, the touch-sensitive light passing through the light guide device will not affect the input angle.

4. The side of the first light guide part and the side of the second light guide part are connected in a V shape and can be symmetrical. Therefore, the position shift that occurs after the touch-sensitive light passes through the first light guide part is symmetrical. After the second light guide part of the second light guide part realizes the reverse position shift, the position shift value of the two is the same and the direction is opposite, so after the touch sensing light passes through the light guide device, the direction and the incident height of the touch sensing light are the same.

5. The first light guide part and the second light guide part are connected through the connecting part, which further ensures the connection strength of the first light guide part and the second light guide part, and the setting of the tail plane is beneficial to fit the connected frame .

6. The fixing bar is connected to the connecting bar, and the fixing bar is located in the opposite direction of the V-shaped opening, and is connected to the frame through the fixing bar, thereby realizing the connection of the frame to the light guide device.

7. In the actual installation, the first light guide part and the second light guide part should be close to the outside, and the fixing strip for fixing is set at a side offset from the center line of the V-shaped opening to facilitate installation. The size of the end of the fixing bar near the connecting bar is smaller than the size of the end far away from the connecting bar. Therefore, an undercut is formed near one end of the connecting bar, and the undercut can be used for installation during installation.

8. The touch-sensitive light passes through the first surface, the second surface, the third surface and the fourth surface successively. Due to refraction, the angle of the touch-sensitive light in the first light guide part and the second light guide part is shifted Yes, after the touch-sensitive light passes through the first light guide part and the second light guide part, the track height of the touch-sensitive light will be offset from the height of the track when it is incident, and the offset distance after the first light guide part is L1, The offset distance through the second light guide is L2. Since the first light guide is symmetrical to the second light guide, the direction of the offset is opposite, and because the thickness of the first light guide and the second light guide are equal , So L1 is equal to L2, so the height of the trajectory when the touch-sensitive light is incident and when it exits remains unchanged.

9. Touch display device. The display module is used for display. The touch sensor lamp is located outside the display module and emits touch sensor light. The light guide device corresponds to the touch sensor lamp. When the touch sensor lamp emits touch After sensing light, it first passes through the light guide device. The touch-sensitive light passes through the light guide device, and first passes through the first light guide part for the first refraction. At this time, the touch-sensitive light track shifts, and then passes through the second light guide part. The second light guide part compensates for the offset of the touch-sensitive light trajectory, so that after the touch-sensitive light emitted from the touch-sensitive light enters and passes through the light guide, the angle and height of the touch-sensitive light track change little or even No change; and then pass through the surface of the display module, the height of the touch-sensitive light trace is the same as the height when emitted; after passing through the second light guide part and the first light guide part in turn, at the same angle and The height enters the opposite side for touch-sensitive light source reception. Therefore, the height difference between the preset sensing surface and the actual sensing surface is small or on the same plane; therefore, the touch sensing light trace is closer to the preset sensing surface. During touch control, the actual sensing surface formed by the touch sensing light trace and the preset sensing When designing, the preset sensing surface is close to the touch surface. In actual use, it is closer to the design effect, avoiding touch control after the user lifts the pen, causing unnecessary control, so the actual sensing surface is closer to the preset sensing surface. Conducive to improving user experience.

12. The first light guide part and the second light guide part are arranged symmetrically. After light enters perpendicular to the midline between the second surface and the third surface, the touch-sensitive light can also exit from the second surface when the light traces out. The center line between the third surfaces is emitted symmetrically, so the movement track of the emitted touch-sensitive light will not shift.

13. The opening between the first light guide portion and the second light guide portion faces the outer surface of the display module. That is, the opening is close to the touch screen or touch glass, and the back side of the opening needs to be provided with a fixing strip for fixing, and the first light guide part and the second light guide part will not be disturbed, so they are close to the display module. There is redundant structure interference, and it can be as close to the display module as possible.

14. The specifications of the light guide device installed on the frame are the same. Through the forward and reverse of the installation direction of the light guide device, the second light guide part is controlled to always contact the outside world first without distinguishing the specifications, which facilitates the installation of the installer.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of the touch display device of the present application;

2 is a schematic diagram of the light guide device and the trajectory of the touch-sensitive light passing through the present application;

Fig. 3 is a schematic diagram of the light guide device and the ambient light passing track of the present application;

4 is a schematic diagram of the coloring of the second light guide part of the light guide device of the present application;

5 is an enlarged schematic diagram of the structure at A in FIG. 1 of the light guide device of the present application.

Description of reference signs:

10. The first light guide part; 11, the first surface; 12, the second surface; 20, the second light guide part; 21, the third surface; 22, the fourth surface; 30, the connecting part; 31, the tail plane; 40. Connecting strip; 50. Fixing strip; 60. Display module; 70. Frame; 80. Touch sensor lamp; 90. Light guide device; β. Inclined angle.

detailed description

The embodiments of the application are described in detail below.

The solid line with arrows in Figures 2 and 3 represents the light trajectory diagram, where the solid line with arrows in Figure 2 represents the light emitted by the touch sensor lamp 80 itself, which is transmitted in a dispersed state to the front, because the other directions are sensitive to touch The impact is small, so the drawing only shows the actual effective light trajectory. For ease of understanding, it is named touch-sensitive light here; the solid line with arrows in Figure 3 represents ambient light.

2 and 3, the light guide device 90 includes a first light guide portion 10 and a second light guide portion 20. The first light guide portion 10 has a first surface 11 and a second surface 12, and the second light guide portion The portion 20 has a third surface 21 and a fourth surface 22. The second surface 12 is opposite to the third surface 21, and there is an inclined angle β between the second surface 12 and the third surface 21. The inclination angle β set here is an acute angle less than 90 degrees.

In this embodiment, the first light guide part 10 and the second light guide part 20 included therein are used for the transmission of touch-sensitive light. Because the propagation speed of light in the two media is different, the touch-sensitive light enters from one medium Refraction occurs when a different medium is different. Among them, the touch-sensitive light enters from the first surface 11 of the first light guide part 10, and the touch-sensitive light is refracted, enters the inside of the first light guide part 10, and then from the first light guide part 10. When the second surface 12 comes out, the touch-sensitive light is refracted again when it is emitted. At this time, the height of the incoming touch-sensitive light and the trace height of the out-going touch-sensitive light change; then the touch-sensitive light flows from the third part of the second light guide 20 When the surface 21 enters, the touch-sensitive light is refracted and enters the second light guide portion 20, and then the touch-sensitive light exits from the fourth surface 22, and at the same time it is refracted, causing the touch-sensitive light to enter from the second light guide portion 20 The height of the trajectory of the touch-sensing light has changed. Because the second surface 12 and the third surface 21 are inclined at an angle, the touch-sensing light passes through the first light guide portion 10, causing the touch-sensing light trajectory due to refraction. The height has changed. After passing through the second light guide portion 20, the height of the touch-sensitive light track is reversely shifted. Therefore, the height of the touch-sensitive touch-sensitive light track shifts through the first light guide portion 10 and the second light guide portion. The parts 20 can cancel each other out, so the height difference between the trajectory of the touch-sensitive light and the trajectory of the incident can be controlled to avoid excessive deviation.

It should be noted that the touch surface represents the physical surface touched by the touch display device during touch control; the actual sensor surface represents the surface that plays the actual sensing role during touch control; the preset sensor surface represents that the touch sensor lamp 80 emits When the emitted touch-sensitive light does not pass through the light guide device 90 and directly enters the touch-sensitive lamp 80 on the opposite side, the touch-sensitive light forms the sensing surface.

As shown in FIG. 1, the touch display device includes a display module 60, a frame 70, a touch sensor lamp 80, and the aforementioned light guide device 90. The display module 60 is installed on the frame 70, and the touch sensor lamp 80 is installed on the display. The side of the module 60 is located outside the display module 60, and the light guide device 90 corresponds to the touch sensor lamp 80. Corresponding here means that each touch-sensitive lamp 80 emits or receives touch-sensitive light through the light guide device 90.

Touch display device, the display module 60 is used for display, where the touch sensor lamp 80 is located outside the display module 60 and emits touch sensor light, and the light guide device 90 corresponds to the touch sensor lamp 80, when the touch sensor lamp After 80 emits the touch-sensitive light, it first passes through the light guiding device 90, the touch-sensitive light passes through the light guiding device 90, first passes through the first light guiding portion 10, and undergoes initial refraction. At this time, the touch-sensitive light trajectory shifts and then passes through The second light guide part 20, the second light guide part 20 compensates for the offset of the touch-sensitive light track, so that the touch-sensitive light is emitted from the touch-sensitive light 80 and passes through the light guide 90. The angle and height of the touch-sensitive light track The position change is small or even unchanged; then it passes through the surface of the display module 60, and the height of the touch-sensitive light track is the same as the height when it is emitted; and then passes through the second light guide portion 20 and the first light guide portion in turn After 10, enter the opposite side at the same angle and height to receive the touch-sensitive light source. Therefore, the height difference between the preset sensing surface and the actual sensing surface is small or on the same plane; therefore, the touch sensing light trace is closer to the preset sensing surface. During touch control, the actual sensing surface formed by the touch sensing light trace and the preset sensing When designing, the preset sensing surface is close to the touch surface. In actual use, it is closer to the design effect, avoiding touch control after the user lifts the pen, causing unnecessary control, so the actual sensing surface is closer to the preset sensing surface. Conducive to improving user experience.

It should be noted that the touch-sensitive light described in this embodiment is close to the display module 60, which is actually a display screen or protective glass close to the surface of the display module 60, where the display screen or protective glass is the touch surface. In this embodiment, the transmitting end is taken as an example for description. Since the sensing light receiving end and the transmitting end are symmetrical, the description of the receiving end is omitted.

As shown in FIG. 2, the first surface 11 is parallel to the second surface 12, and the third surface 21 is parallel to the fourth surface 22.

Since the first surface 11 and the second surface 12 are parallel, after the touch-sensitive light enters the first light guide portion 10, the angular deviation formed by the two successive refractions is exactly the opposite, so they can cancel each other out, which ultimately leads to The touch-sensitive light is parallel when entering the first light guide portion 10 and when the first light guide portion 10 is emitted. Similarly, since the third surface 21 and the fourth surface 22 are parallel, the light passing through the second light guide portion 20 The touch-sensitive light trajectory is parallel when it enters the second light guide portion 20 and when it exits the second light guide portion 20, so the touch-sensitive light passing through the light guide device 90 will not affect the angle when it enters.

As shown in FIG. 2, the thickness of the first light guide portion 10 and the second light guide portion 20 are equal, and the first light guide portion 10 and the second light guide portion 20 are symmetrical. The dotted line in FIG. The center of symmetry between the light portion 10 and the second light guide portion 20. There is an inclined angle β between the second surface 12 and the third surface 21. The first light guide portion 10 and the second light guide portion 20 are symmetrical, so the included angle between the second surface 12 and the third surface 21 and the center line of symmetry is β/2.

The touch-sensitive light 80 emits touch-sensitive light and passes through the first surface 11, the second surface 12, the third surface 21, and the fourth surface 22 successively. Due to refraction, the touch-sensitive light is in the first light guide part 10 and the second light guide part 10 and the second surface 22. The angle inside the light guide portion 20 is shifted, so after the touch-sensitive light passes through the first light guide portion 10 and the second light guide portion 20, the height of the track of the touch-sensitive light will deviate from the height of the track when it is incident. The offset distance through the first light guide part 10 is L1, and the offset distance through the second light guide part 20 is L2. Since the first light guide part 10 and the second light guide part 20 are symmetrical, the offset direction is opposite. In addition, since the thickness of the first light guide portion 10 and the second light guide portion 20 are equal, L1 is equal to L2, so that the height of the trajectory when the touch-sensitive light is incident and the trajectory when it exits remains unchanged.

The light guide device 90 can also play a role in filtering the ambient light. When the ambient light passes through the second light-transmitting part 20, it is first reflected on the fourth surface 22 to remove part of the ambient light. The original ambient light is weak. After the reflection and refraction of the first light guide portion 10 and the second light guide portion 20, the ambient light that can pass through the light guide device 90 is very weak, so it plays a role in filtering the ambient light.

Wherein, the inclination angle β is 12 to 40 degrees. In this embodiment, the tilt angle β is specifically selected to be 28 degrees. If the incident angle is too large, it is easy to cause the touch-sensitive light to be scattered, and if the tilt angle β is too large, the component force that resists pressure will be generated when pressure is applied. If the inclination angle β is too small, the ambient light will be formed between the second surface 12 and the third surface 21 after passing through the second light guide portion 20. If the reflection angle is too small, the ambient light will be repeatedly reflected between the second surface 12 and the third surface 21, so the ambient light passing through the first light guide portion 10 will increase accordingly, so the tilt angle β is controlled to 12 In the range of 40 degrees to 40 degrees, the number of reflections of the ambient light can be increased, and after reflection, the second surface 12 and the third surface 21 are quickly emitted. In addition, since the touch-sensitive light emitted by the touch-sensitive lamp 80 is relatively strong, the loss of the touch-sensitive light passing through the light guide device 90 is relatively small.

As shown in Fig. 3, when the ambient light enters the second light guide portion 20 vertically, the ambient light will not be refracted at this time. After most of the ambient light passes through, it enters the first light guide portion 10, because the second light guide There is an angle between the third surface 21 of the portion 20 and the second surface 12 of the first light guide portion 10, so the ambient light will be reflected and refracted when passing through the second surface 12. Part of the ambient light will be filtered by reflection. When passing through the first surface 11, the ambient light is reflected again. At this time, the originally incident ambient light is weak, and after two reflections, it becomes weaker.

As shown in Figure 4, the second light guide portion 20 is colored by using a masterbatch and processed into a colored transparent second light guide portion 20. This method can be integrated into one piece without subsequent processing and the color masterbatch can be used for the second The inside of the light guide portion 20 is colored, so even if the fourth surface 22 of the second light guide portion 20 is worn, it does not affect the filtering of ambient light.

As shown in FIG. 2, the side of the first light guide portion 10 and the side of the second light guide portion 20 are connected to form a V shape, and the first light guide portion 10 and the second light guide portion 20 The connection part is the connection part 30. The side of the first light guide part 10 and the side of the second light guide part 20 are connected in a V shape and can be symmetrical. Therefore, the position shift that occurs after the touch-sensitive light passes through the first light guide part 10, passes through After the symmetrical second light guide part 20 realizes the reverse position shift, the position shift value of the two is the same and the direction is opposite, so after the touch sensing light passes through the light guide device 90, the direction and the incident height of the touch sensing light are both the same.

As shown in FIG. 2, the outer side of the connecting portion 30 has a tail plane 31, and the tail plane 31 extends from the side of the first light guide portion 10 to the side of the second light guide portion 20. The first light guide portion 10 and the second light guide portion 20 are connected by the connecting portion 30, which further ensures the connection strength of the first light guide portion 10 and the second light guide portion 20, and the setting of the tail plane 31 is beneficial to sticking合Connected frame 70.

The light guide device 90 further includes a connecting bar 40 connected to the connecting portion 30. The connecting bar 40 is connected to the connecting portion 30 and extends outward, and the connecting bar 40 can be connected to the frame 70 to realize the fixing of the light guide device 90.

As shown in FIGS. 2 and 3, the light guide device 90 further includes a fixing bar 50 connected to the connecting bar 40, and the fixing bar 50 is located in the opposite direction of the V-shaped opening. The fixing bar 50 is connected to the connecting bar 40, and the fixing bar 50 is located in the opposite direction of the V-shaped opening, and is connected to the frame 70 through the fixing bar 50, thereby realizing the connection of the frame 70 to the light guide 90.

As shown in FIGS. 2 and 5, the fixing bar 50 is offset to the side with respect to the center line of the V-shaped opening. Since in the actual installation, the first light guide portion 10 and the second light guide portion 20 are to be installed inside the frame 70, the fixing strip 50 for fixing is arranged at the center line connecting strip 40 of the V-shaped opening. The side offset position makes it easier to install.

As shown in FIG. 2, the size of the fixing strip 50 on the side away from the V-shaped opening is larger than the size on the side close to the V-shaped opening. That is, the size of the end of the fixing bar 50 near the connecting bar 40 is smaller than the size of the end far away from the connecting bar 40. Therefore, an undercut is formed near one end of the connecting bar 40, and the undercut can be used for installation during installation.

In addition, the center line between the second surface 12 and the third surface 21 is perpendicular to the axis of the touch sensor lamp 80. The second surface 12 and the third surface 21 are symmetrical, that is, the first light guide portion 10 and the second light guide portion 20 are symmetrically arranged, and the light is perpendicular to the second surface 12 and the third surface 21. After the midline of the touch-sensitive light enters, the touch-sensitive light trajectory can also be emitted symmetrically from the midline between the second surface 12 and the third surface 21 when it comes out, so the emitted touch-sensitive light movement trajectory will not shift.

As shown in FIG. 1, the opening between the first light guide portion 10 and the second light guide portion 20 faces the outer surface of the display module 60. That is, the opening is close to the touch screen or touch glass, and the back side of the opening needs to be provided with a fixing strip 50 for fixing, and the first light guide portion 10 and the second light guide portion 20 will not be interfered, so they are connected with the display module 60 Close to, there will be no unnecessary structural interference, and it can be as close to the display module 60 as possible.

As shown in FIG. 1, the frame 70 includes a first side and a second side corresponding to each other. The touch sensor lamp 80 and the light guide 90 are provided at the first side and the second side. , The two light guide devices 90 on the first side and the second side are opposite. Among them, the specifications of the light guide 90 installed on the frame 70 are the same. Through the forward and reverse of the installation direction of the light guide 90, the second light guide 20 is controlled to always contact the outside world first without distinguishing the specifications, which facilitates the installation by the installer .

The first light guide portions 10 of the two light guide devices 90 located on the first side and the second side have opposite inclination directions with respect to the central axis between the first side and the second side; The second light guide portions 20 of the two light guide devices 90 on the first side and the second side are also inclined in opposite directions with respect to the central axis between the first side and the second side. Even if the second light guide part 20 always comes into contact with the outside world first. In particular, after the second light guide portion 20 is colored by the color masterbatch, it can filter the ambient light.

Under normal circumstances, the frame 70 also includes a third side and a fourth side. The touch sensor lamp 80 on the first side is a transmitter, and the touch sensor lamp 80 on the second side is a transmitter. It is a receiving part, and the two are matched; the touch sensor lamp 80 on the third side is a transmitting part, and the touch sensor lamp 80 on the fourth side is a receiving part, and the two are matched.

For clarity, the touch-sensing light just emitted by the touch-sensing lamp 80 here is named the first touch-sensing light, and the subsequent reflection or refraction is named the second touch-sensing light, the third touch-sensing light...

As shown in FIGS. 1 and 2, the touch sensor lamp 80 emits first touch sensor light; the first touch sensor light is refracted by the first surface 11 and deflected relative to the first touch sensor light to become the second touch sensor light; The second touch-sensitive light is refracted by the second surface 12 and deflected relative to the second touch-sensitive light to become the third touch-sensitive light. The third touch-sensitive light is deflected parallel to the first side relative to the first touch-sensitive light. Shift the first distance L1; the third touch-sensitive light is refracted by the third surface 21 and is deflected relative to the third touch-sensitive light-and becomes the fourth touch-sensitive light; the fourth touch-sensitive light is refracted after being refracted by the fourth surface 22 Relative to the fourth touch-sensitive light deflection & degree becomes the fifth touch-sensitive light, and the fifth touch-sensitive light is offset in parallel by the second distance L2 to the opposite side of the first side relative to the third touch-sensitive light; The light is emitted along the touch glass to the light guide 90 on the opposite side.

For the sake of clarity, the ambient light just entering here is named the first ambient light, and the subsequent reflected or refracted ambient light is named the second ambient light, the third ambient light...

As shown in FIG. 3, after the first ambient light is reflected and refracted by the fourth surface 22, the remaining ambient light is the second ambient light; the second ambient light enters the second light guide portion 20, and the second ambient light passes through the third After the surface 21 is reflected and refracted, the remaining ambient light is the third ambient light; the third ambient light exits the second light guide portion 20, and after the third ambient light is reflected and refracted by the second surface 12, the remaining ambient light is the fourth Ambient light; the fourth ambient light enters the first light guide 10, after the fourth ambient light is reflected and refracted by the first surface 11, the remaining ambient light is the fifth ambient light; the fifth ambient light is received by the sensing element.

At this time, the ambient light after multiple reflections and refractions is relatively weak, and the impact on the sensing element is relatively small.

The above are only specific embodiments of this application, and do not limit the scope of protection of this application; any substitutions and improvements made on the basis of not violating the concept of this application belong to the scope of protection of this application.

Claims

The light guide device includes a first light guide portion and a second light guide portion, the first light guide portion has a first surface and a second surface, the second light guide portion has a third surface, a fourth surface, and a second surface It is opposite to the third surface, and there is an inclined angle between the second surface and the third surface.
8. The light guide device of claim 1, wherein the inclination angle is 12 degrees to 40 degrees.
8. The light guide device of claim 1, wherein the first surface is parallel to the second surface, and the third surface is parallel to the fourth surface.
The light guide device according to any one of claims 1 to 3, wherein the side of the first light guide part is connected to the side of the second light guide part to form a V shape, and the first light guide The connection part of the second light guide part is the connection part.
5. The light guide device of claim 4, wherein the outer side of the connecting portion has a tail plane extending from a side of the first light guide portion to a side of the second light guide portion.
8. The light guide device of claim 5, further comprising a connecting bar connected to the connecting portion.
8. The light guide device of claim 6, further comprising a fixing bar connected to the connecting bar, and the fixing bar is located in the opposite direction of the V-shaped opening.
8. The light guide device of claim 7, wherein the fixing bar is offset to the side with respect to the center line of the V-shaped opening.
8. The light guide device according to claim 8, wherein the dimension of the side of the fixing bar away from the V-shaped opening is larger than the dimension of the side close to the V-shaped opening.
The light guide device according to any one of claims 1 to 3, wherein the thickness of the first light guide part and the second light guide part are equal.
A touch display device, including a display module, a frame, a touch sensor lamp, and the light guide device according to any one of claims 1 to 10, the display module is installed on the frame, and the touch sensor lamp is installed on the display The side of the module is located outside the display module, and the light guide device corresponds to the touch sensor lamp.
11. The touch display device according to claim 11, wherein the center line between the second surface and the third surface is perpendicular to the axis of the touch sensor lamp.
11. The touch display device of claim 12, wherein the opening between the first light guide portion and the second light guide portion faces the outer surface of the display module.
The touch display device according to claim 12, wherein the frame includes a first side and a second side correspondingly arranged, and the touch sensor lamp and the second side are provided at the position of the first side and the second side. In the light guide device, the two light guide devices on the first side and the second side are opposite to each other.
The touch display device of claim 14, wherein the first light guide portion of the two light guide devices located on the first side and the second side is relative to the distance between the first side and the second side. The inclination directions of the central axis are opposite; the second light guide parts of the two light guide devices located on the first side and the second side are also inclined with respect to the central axis between the first side and the second side The direction is opposite.