Side light-out touch module

Abstract

The utility model relates to the field of touch panel, concretely relates to a side light emission's touch module, including the panel, light guide layer group and PCB board that are sequentially stacked from top to bottom, be equipped with at least one light transmission touch position on the panel, be equipped with touch IC and at least one touch piece on the PCB board, the touch piece is electrically connected with touch IC, the light guide layer group includes the light shield, is equipped with at least one group of light source channel and propagation channel on the light shield, the light source channel is located one side of propagation channel, and is mutually communicated with propagation channel, is provided with light emitting element in the light source channel, light emitting element sets up in the front of PCB board, and is located the side portion of light transmission touch position, light emitting element emits light rays towards propagation channel, and light rays are delivered to light transmission touch position through light guide plate, form the light ray propagation channel of '' L '' type, ensure that light rays can carry out dispersion and then carry out uniform illumination to light transmission touch.

Description

Technical Field

[0001] This utility model relates to the field of touch panels, specifically to a side-emitting touch module. Background Technology

[0002] A touch panel is an input device that enables human-computer interaction by directly touching the screen surface. Its core function is to convert physical touch actions into electrical signals, which are then recognized and responded to by electronic devices. Its working principle relies on sensor technology, with common types including resistive, capacitive, infrared, and surface acoustic wave sensors. Among these, capacitive sensors, due to their high sensitivity and support for multi-touch, have become the mainstream choice for consumer electronics products such as smartphones and tablets.

[0003] With the development of technology, touch panels have been applied in various aspects of life, from the operation interface of bank ATMs and the navigation screens of shopping mall self-service terminals to smart whiteboards in education, touch dashboards in industrial control, and even the central control screens of automobiles and the panel control of smart homes. All of these rely on the support of touch technology. In the current combination of touch panels and light sources, most of them place the light source on the back of the PCB board to avoid affecting the touch area. However, the light source is obstructed, requiring the use of a higher power light source, which increases costs. Alternatively, the light source can be placed on the front of the PCB board to solve the problem of light obstruction. However, a single light source needs to diffuse the light to provide uniform illumination to the touch area. In order to provide space for light diffusion, a thick light shield is required, resulting in a relatively thick touch panel that cannot meet the requirements of thin and light appliance designs. Utility Model Content

[0004] The purpose of this invention is to provide a side-emitting touch module, which aims to improve the problems of high cost and large thickness of conventional touch panels.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A side-emitting touch module includes a panel, a light guide layer group, and a PCB board stacked from top to bottom;

[0007] The panel has at least one light-transmitting touch position; the PCB board has a touch IC and at least one touch pad, and the touch pad is electrically connected to the touch IC;

[0008] The light guide layer assembly includes a light shield, on which at least one set of light source channels and propagation channels are formed. The light-transmitting touch position, the propagation channel, and the touch sheet are arranged in a one-to-one correspondence. The light source channel is located on one side of the propagation channel and is interconnected with the propagation channel. A light-emitting element is disposed in the light source channel, with the light-emitting side of the light-emitting element facing the propagation channel and electrically connected to the PCB board. A light guide plate is disposed in the propagation channel, with the top and bottom surfaces of the light guide plate respectively attached to the panel and the touch sheet.

[0009] Furthermore, the light guide plate is a gradient color light guide plate, and the color depth of the side of the light guide plate closer to the light-emitting element is higher than the color depth of the side farther away from the light-emitting element.

[0010] Furthermore, the thickness of the light-shielding plate is 1-3mm.

[0011] Furthermore, the light guide plate and the light shield are of equal thickness.

[0012] Furthermore, the thickness of the light-shielding plate is greater than or equal to the height of the light-emitting element.

[0013] Furthermore, the thickness of the light-shielding plate is equal to the height of the light-emitting element.

[0014] Furthermore, the light-shielding plate is a foam light-shielding plate.

[0015] Furthermore, the light-emitting element is an LED bead, and the number of LED beads in the light source channel is two, with the two LED beads arranged side by side at intervals.

[0016] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0017] The light-emitting element is set on the front of the PCB board and located on the side of the light-transmitting touch position. The light-emitting element emits light towards the propagation channel. The light is transmitted to the light-transmitting touch position through the light guide plate, forming an "L"-shaped light propagation channel. This ensures that the light can be diffused to provide uniform illumination to the light-transmitting touch position. While ensuring the lighting effect, the thickness of the light shield is effectively reduced, thereby reducing the overall thickness of the touch module. At the same time, it avoids setting the light-emitting element on the back of the PCB board, saving production costs. Attached Figure Description

[0018] Figure 1 This is an exploded view of the side-emitting touch module of this utility model;

[0019] Figure 2 This is a schematic diagram of the light propagation path of the side-emitting touch module of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Panel; 11. Light-transmitting touch area;

[0022] 2. Light guide layer assembly; 21. Light shield; 211. Light source channel; 212. Propagation channel; 22. Light-emitting element; 23. Light guide plate;

[0023] 3. PCB; 31. Touch panel; 32. Touch IC. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element of this utility model must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] When an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to," it can be directly connected to or indirectly connected to that other element.

[0027] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example

[0029] Please refer to Figure 1 and Figure 2As shown, this embodiment provides a side-emitting touch module, including a panel 1, a light guide layer group 2, and a PCB board stacked from top to bottom. The panel 1 has at least one light-transmitting touch position 11; the PCB board has a touch IC 32 and at least one touch sheet 31, with the touch sheet 31 electrically connected to the touch IC 32. The light guide layer group 2 includes a light-shielding plate 21, which has at least one set of light source channels 211 and propagation channels 212. The light-transmitting touch positions 11, propagation channels 212, and touch sheets 31 are arranged in a one-to-one correspondence. In this embodiment, there are twelve light-transmitting touch positions 11, propagation channels 212, and touch sheets 31, arranged in two rows with intervals. Similarly, more or fewer light-transmitting touch positions 11, propagation channels 212, and touch sheets 31 can also be provided. The light source channel 211 is located on one side of the propagation channel 212 and is interconnected with the propagation channel 212; a light-emitting element 22 is provided in the light source channel 211, the light-emitting side of the light-emitting element 22 is facing the propagation channel 212 and is electrically connected to the PCB 3 board; a light guide plate 23 is provided in the propagation channel 212, the top surface and bottom surface of the light guide plate 23 are respectively attached to the panel 1 and the touch sheet 31.

[0030] In this embodiment, the light-emitting element 22 is disposed on the front side of the PCB3 board and located on the side of the light-transmitting touch position 11. The light-emitting element 22 emits light towards the propagation channel 212. The light is transmitted to the light-transmitting touch position 11 through the light guide plate 23, forming an "L"-shaped light propagation channel 212. This ensures that the light can be diffused to provide uniform illumination to the light-transmitting touch position. While ensuring the illumination effect, the thickness of the light shield 21 is effectively reduced, thereby reducing the overall thickness of the touch module. At the same time, the light-emitting element 22 is not disposed on the back side of the PCB3 board, saving production costs. Meanwhile, the light guide plate 23 supports the panel 1, preventing the light-transmitting touch position 11 from being damaged by pressure and collapse, which would affect the touch effect.

[0031] In this embodiment, the light guide plate 23 is a gradient color light guide plate 23, with the color depth of the side of the light guide plate 23 closer to the light-emitting element 22 being higher than the color depth of the side farther from the light-emitting element 22. This design makes the area of ​​the light guide plate 23 closer to the light-emitting element 22 a darker gradient color, partially blocking the light from the light-emitting side of the light-emitting element 22. This reduces the light intensity on the side of the light-transmitting touch position 11 closer to the light-emitting element 22, ensuring that the light intensity on the side of the light-transmitting touch position 11 farther from the light-emitting element 22 is equal to the light intensity on the side closer to the light-emitting element 22. This avoids a situation where the brightness of the side of the light-transmitting touch position 11 closer to the light-emitting element 22 is higher than the brightness of the side farther from the light-emitting element 22, maximizing uniform illumination of the light-transmitting touch position 11 and further improving the display effect.

[0032] The thickness of the light-shielding plate 21 is 1-3mm. The thicknesses of the light-shielding plate 21, the light-emitting element 22, and the light guide plate 23 are controlled within 1-3mm to avoid the light-shielding plate 21 being too thick, which would affect the overall thickness of the touch module. In this embodiment, the thickness of the light-shielding plate 21 is 2mm. Similarly, the thickness of the light-shielding plate 21 can also be 1mm or 3mm.

[0033] In this embodiment, the light guide plate 23 and the light shield 21 have the same thickness, so that the top surface of the light guide plate 23 can be closely attached to the bottom surface of the panel 1, and the bottom surface of the light guide plate 23 can be closely attached to the touch sheet 31, thereby improving the fit between the three and thus improving the touch sensitivity.

[0034] The thickness of the light-shielding plate 21 is greater than or equal to the height of the light-emitting element 22, effectively preventing light leakage and ensuring that the touch module has a good display effect. In this embodiment, the thickness of the light-shielding plate 21 is equal to the height of the light-emitting element 22, maximizing the size of the light-emitting element 22 and improving the illumination brightness.

[0035] In this embodiment, the light-emitting element 22 is an LED bead, and the number of LED beads in the light source channel 211 is two, arranged side by side with a gap between them. Using two smaller LED beads arranged side by side effectively reduces production costs and lowers maintenance costs in the event of a malfunction where some beads experience reduced brightness or fail to light up. In this embodiment, the light-shielding plate 21 is a foam light-shielding plate 21, which has a good light-shielding effect, preventing light leakage and improving the display effect.

[0036] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A side-emitting touch module, characterized in that, This includes a panel, a light guide layer assembly, and a PCB board stacked from top to bottom; The panel has at least one light-transmitting touch position; the PCB board has a touch IC and at least one touch pad, and the touch pad is electrically connected to the touch IC; The light guide layer assembly includes a light shield, on which at least one set of light source channels and propagation channels are formed. The light-transmitting touch position, the propagation channel, and the touch sheet are arranged in a one-to-one correspondence. The light source channel is located on one side of the propagation channel and is interconnected with the propagation channel. A light-emitting element is disposed in the light source channel, with the light-emitting side of the light-emitting element facing the propagation channel and electrically connected to the PCB board. A light guide plate is disposed in the propagation channel, with the top and bottom surfaces of the light guide plate respectively attached to the panel and the touch sheet.

2. The side-emitting touch module according to claim 1, characterized in that: The light guide plate is a gradient color light guide plate, and the color depth of the side of the light guide plate closer to the light-emitting element is higher than the color depth of the side farther away from the light-emitting element.

3. The side-emitting touch module according to claim 1, characterized in that: The thickness of the light-shielding plate is 1-3mm.

4. The side-emitting touch module according to claim 3, characterized in that: The light guide plate and the light shield are of equal thickness.

5. The side-emitting touch module according to claim 3, characterized in that: The thickness of the light-shielding plate is greater than or equal to the height of the light-emitting element.

6. The side-emitting touch module according to claim 5, characterized in that: The thickness of the light-shielding plate is equal to the height of the light-emitting element.

7. The side-emitting touch module according to claim 1, characterized in that: The light-shielding board is a foam light-shielding board.

8. The side-emitting touch module according to claim 1, characterized in that: The light-emitting element is an LED lamp bead, and there are two LED lamp beads in the light source channel, which are arranged side by side with a gap between them.

Images