Touch panel with light-emitting function
By designing a thinner light guide structure on the touch panel, combining the light emitting parts and circuit board, the problem of increasing the thickness of the light guide plate in the prior art is solved, and the light emitting function and thinning are achieved. It is suitable for a variety of electronics product.
Patent Information
- Application Number
- CN202420963920.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-11-27
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The existing touch panel with light emitting function has increased the overall thickness due to the addition of a light emitting unit and a light guide plate, making it difficult to achieve a thinner design.
Using a thinner light guide structure, the overall thickness is reduced by providing light emitting parts on the circuit board and using the combination of the front cover and the circuit board, for example, by providing recesses or openings on the circuit board to accommodate the light emitting parts and guides. The light plate forms a light guide structure that enters light sideways or vertically, avoiding additionally increasing the thickness of the light guide plate.
It realizes that while maintaining the light emitting function, the overall thickness of the touch panel is reduced, and controlled between 1.2 mm and 0.9 mm, achieving the requirements of thinner shapes, and is suitable for notebook computers and other electronic products.
Smart Images
Figure CN222281198U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a touch panel with a luminous function. Background Art
[0002] With the booming development of the e-sports industry, e-sports notebook computers will be designed with touch panels with luminous functions on the operation interface. The existing touch panels with luminous functions have increased thickness due to the addition of luminous units and light guide plates. Summary of the invention
[0003] The utility model relates to a touch panel with a lighting function, which has a thin light-guiding structure.
[0004] According to one aspect of the utility model, a touch panel with a lighting function is provided, comprising a circuit board, a front cover plate and at least one lighting element. The front cover plate is disposed on the circuit board, and the at least one lighting element is disposed on the circuit board. The front cover plate has a first thickness, and the circuit board has a second thickness. The front cover plate has a top surface, and the circuit board has a bottom surface, wherein the distance between the top surface and the bottom surface is equal to the sum of the first thickness and the second thickness.
[0005] According to one aspect of the utility model, a touch panel with a light-emitting function is provided, comprising a circuit board, a light guide plate and at least one light-emitting element. The circuit board has a bottom surface and a plurality of openings, and the openings penetrate the circuit board. The light guide plate is disposed on the bottom surface of the circuit board. At least one light-emitting element is disposed on the bottom surface of the circuit board. The light-emitting element and the light guide plate constitute a light-guiding structure for light entering from the bottom side of the circuit board.
[0006] According to one aspect of the utility model, a touch panel with a light-emitting function is provided, comprising a circuit board, a light guide plate and at least one light-emitting element. The circuit board has a surface and at least one recessed hole, the recessed hole being recessed inward from the surface. The light guide plate is disposed on the surface of the circuit board and covers the recessed hole. At least one light-emitting element is disposed in the recessed hole of the circuit board.
[0007] In order to better understand the above and other aspects of the present invention, the following embodiments are specifically described in detail with reference to the accompanying drawings: BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1A and 1B An exploded view and a cross-sectional view along line AA of a touch panel with a lighting function according to an embodiment of the present invention are shown.
[0009] Figure 2A and 2BThe figure shows an exploded view of a touch panel with a lighting function according to an embodiment of the present invention and a cross-sectional view along line BB.
[0010] Figure 3A and 3B An exploded view and a cross-sectional view along line CC of a touch panel with a lighting function according to an embodiment of the present invention are shown.
[0011] Figure 4 A schematic diagram showing the bottom surface of a circuit board.
[0012] Wherein, the accompanying drawings are marked as follows:
[0013] 100, 101, 102: touch panel 110: circuit board
[0014] 120, 120': front cover 130: luminous element
[0015] 110a: upper surface 110b: bottom surface
[0016] 111: touch sensing circuit 112: concave hole
[0017] 113: Electronic components 114: Opening
[0018] 120a: top surface 120b: bottom surface
[0019] 121: Glass substrate 122: Light guide plate
[0020] S1: Side D1: First thickness
[0021] D2: Second thickness DETAILED DESCRIPTION
[0022] Please refer to Figure 1A and 1B , which depicts an exploded view of a touch panel 100 with a light-emitting function according to an embodiment of the present invention and a cross-sectional view along line AA. The touch panel 100 can be integrated into a notebook computer, a keyboard or other electronic products that require an input interface to control mouse movement or screen scrolling, etc.
[0023] The touch panel 100 includes a circuit board 110, a front cover 120 and at least one light-emitting element 130. The front cover 120 is disposed on the circuit board 110, and the at least one light-emitting element 130 is disposed on the circuit board 110. Taking two light-emitting diodes as an example, the light-emitting diodes are disposed on the left and right sides of the circuit board 110, and the front cover 120 is disposed between the two light-emitting diodes to form a light-guiding structure with one side light entering. In one embodiment, the upper surface 110a of the circuit board 110 has a touch sensing circuit 111 for sensing the capacitance change when the front cover 120 covers the circuit board 110 and is touched by a human body or a conductor, so as to know the touch position. In one embodiment, the circuit board 110 is, for example, a printed circuit board, and the touch sensing circuit 111 is, for example, a capacitive sensing circuit.
[0024] Please refer to Figure 1A and 1B , the front cover plate 120 has a side surface S1, the light emitting element 130 is adjacent to the side surface S1 of the front cover plate 120 and is disposed on the circuit board 110, and the light generated by the light emitting element 130 enters the front cover plate 120 through the side surface S1, so as to serve as a light emitting element 130 with one side light entering. In one embodiment, the front cover plate 120 may be a composite light guide plate, which includes a light guide material and a resin material. The light guide material may include polymethyl methacrylate (PMMA), glass, polycarbonate (PC), polyethylene terephthalate (PET), polyimide (PI) or other suitable materials. The resin material includes acrylic resin, epoxy resin, silicone or a combination thereof. In addition, depending on actual needs, a reflective layer (not shown) or other components may be disposed on the back of the front cover plate 120, but the utility model is not limited to this. In addition, the front cover 120 may be coated with a dark color pigment to provide a dark appearance with high light transmittance.
[0025] Please refer to Figure 1B , the front cover plate 120 has a first thickness D1, and the circuit board 110 has a second thickness D2. In one embodiment, the first thickness D1 is, for example, between 0.7 mm and 0.5 mm. The second thickness D2 is, for example, between 0.5 mm and 0.4 mm. Since the touch panel 100 of this embodiment has the light emitting element 130 disposed on one side of the front cover plate 120, and the front cover plate 120 directly covers the circuit board 110, it is not necessary to dispose the light guide plate 122 between the front cover plate 120 and the circuit board 110, so as to reduce the overall thickness of the touch panel 100.
[0026] like Figure 1BAs shown, the front cover plate 120 has a top surface 120a, and the circuit board 110 has a bottom surface 110b, wherein the distance H between the top surface 120a and the bottom surface 110b is equal to the sum of the first thickness D1 and the second thickness D2. In other words, the overall thickness of the touch panel 100 can be controlled between 1.2 millimeters (mm) and 0.9 millimeters (mm), thereby meeting the requirement of thinness. In one embodiment, the front cover plate 120 and the circuit board 110 can be bonded to each other through a film (not shown in the figure). Since the thickness of the film is very thin and can be ignored, it will not affect the overall thickness.
[0027] Please refer to Figure 2A and 2B , which illustrates an exploded view of a touch panel 101 with a lighting function according to an embodiment of the utility model and a cross-sectional schematic diagram along line BB. The touch panel 101 includes a circuit board 110, a front cover plate 120 and at least one light-emitting component 130. The front cover plate 120 is disposed on the circuit board 110, and at least one light-emitting component 130 is disposed in a recessed hole 112 of the circuit board 110. The recessed hole 112 is recessed inward from the upper surface 110a of the circuit board 110 to accommodate the light-emitting component 130. Taking two light-emitting diodes as an example, the light-emitting diodes are disposed on the lower side of the front cover plate 120, and the front cover plate 120 is disposed above the two light-emitting diodes to form a light-guiding structure with vertical light input.
[0028] Please refer to Figure 2A and 2B The front cover plate 120 has a lower surface 120b, the light emitting element 130 is located at the lower side of the front cover plate 120, and the light generated by the light emitting element 130 enters the front cover plate 120 through the lower surface 120b, so as to serve as a vertical light-entering light emitting element 130. In one embodiment, the front cover plate 120 may be composed of a light guide plate 122 and a glass substrate 121, such as Figure 2A In another embodiment, the front cover plate 120 may be a composite light guide plate, such as Figure 1A shown.
[0029] Please refer to Figure 2A The light guide plate 122 may include poly(methyl methacrylate), PMMA, glass, polycarbonate (PC), polyethyleneterephthalate (PET), polyimide (PI) or other suitable materials. The glass substrate 121 covers the light guide plate 122, and a dark pigment may be coated on the glass substrate 121 to provide a dark appearance with high light transmittance.
[0030] Please refer to Figure 2B, the front cover plate 120 has a first thickness D1, the first thickness D1 includes a first layer thickness and a second layer thickness, and the circuit board 110 has a second thickness D2. The first layer thickness may be the thickness of the glass substrate 121, and the second layer thickness may be the thickness of the light guide plate 122. In one embodiment, the first layer thickness is, for example, between 0.5 mm and 0.3 mm, and the second layer thickness is, for example, between 0.4 mm and 0.2 mm. The second thickness D2 is, for example, between 0.5 mm and 0.4 mm. Since the touch panel 101 of this embodiment has the light emitting component 130 disposed on the lower side of the front cover 120, the light emitting component 130 is disposed in a recessed hole 112 of the circuit board 110, and the front cover 120 covers the recessed hole 112, even if the light guide plate 122 is disposed between the front cover 120 and the circuit board 110 to increase the thickness, the thickness of the light guide plate 122 can be minimized as much as possible to reduce the overall thickness of the touch panel 101.
[0031] like Figure 2B As shown, the front cover 120 has a top surface 120a, and the circuit board 110 has a bottom surface 110b, wherein the distance H between the top surface 120a and the bottom surface 110b is equal to the sum of the first thickness D1 and the second thickness D2. In other words, the overall thickness of the touch panel 101 can be controlled between 1.4 mm and 0.9 mm. Figure 1A The composite light guide plate 122 can control the overall thickness of the touch panel 101 to be between 1.2 mm and 0.9 mm, thereby achieving the requirement of thinness. In one embodiment, the front cover 120 and the circuit board 110 can be bonded to each other via a film (not shown), and the glass substrate 121 and the light guide plate 122 can be bonded to each other via a film (not shown). Since the thickness of the film is very thin and can be ignored, it will not affect the overall thickness.
[0032] Although Figure 2A and 2B Two light emitting elements 130 are shown in the figure, but it is conceivable that the number of light emitting elements 130 is not limited, wherein the light emitting elements 130 may be a light emitting element array, which is arranged on the circuit board 110 and accommodated in each recess 112 of the circuit board 110, so as to serve as a touch panel with dot matrix light emission. In another embodiment, the light emitting element array may also be arranged on the circuit board 110 and covered by Figure 1A Under the composite light guide plate, it serves as a touch panel with dot matrix lighting.
[0033] Please refer to Figure 3A and 3B, which depicts an exploded view of a touch panel 102 with a lighting function according to an embodiment of the present invention and a cross-sectional schematic diagram along the CC line. The touch panel 102 includes a circuit board 110, a front cover 120' and at least one lighting element 130. The front cover 120' is disposed on the circuit board 110, and the at least one lighting element 130 is disposed on the circuit board 110. Taking two light-emitting diodes as an example, the light-emitting diodes are disposed on the bottom surface 110b of the circuit board 110, and the circuit board 110 has a plurality of openings 114, which penetrate the circuit board 110 and expose a lower surface 120b of the front cover 120'.
[0034] Please refer to Figure 3A and 3B , a light guide plate 122 is further provided on the bottom surface 110b of the circuit board 110, the light emitting element 130 is located on one side of the light guide plate 122, and the light generated by the light emitting element 130 enters the opening 114 of the circuit board 110 through the light guide plate 122, and then enters the front cover plate 120' through the opening 114 of the circuit board 110. Since the light emitting element 130 and the light guide plate 122 in this embodiment are both located below the circuit board 110, the light emitting element 130 and the light guide plate 122 can form a light guide structure that enters light from the bottom side of the circuit board 110. The light guide plate 122 may include poly(methyl methacrylate), PMMA, glass, polycarbonate (PC), polyethyleneterephthalate (PET), polyimide (PI) or other suitable materials.
[0035] Please refer to Figure 3B , the front cover 120' has a first thickness D1, and the circuit board 110 has a second thickness D2. In one embodiment, the first thickness D1 is, for example, between 0.7 mm and 0.5 mm. The second thickness D2 is, for example, between 0.5 mm and 0.4 mm. Since the touch panel 102 of this embodiment has the light emitting element 130 and the light guide plate 122 disposed on the bottom surface 110b of the circuit board 110, and the front cover 120 directly covers the circuit board 110, the thickness of the light guide plate 122 does not affect the thickness of the circuit board 110, so as to reduce the overall thickness of the touch panel 100.
[0036] like Figure 3BAs shown, the front cover plate 120' has a top surface 120a, and the circuit board 110 has a bottom surface 110b, wherein the distance H between the top surface 120a and the bottom surface 110b is equal to the sum of the first thickness D1 and the second thickness D2. In other words, the overall thickness of the touch panel 102 (excluding the light guide plate 122) can be controlled between 1.2 millimeters (mm) and 0.9 millimeters (mm), thereby meeting the requirement of thinness. In one embodiment, the front cover plate 120' and the circuit board 110 can be bonded to each other through a film (not shown in the figure). Since the thickness of the film is very thin and can be ignored, it will not affect the overall thickness.
[0037] Please refer to Figure 4 , which is a schematic diagram of the bottom surface 110b of the circuit board 110. A touch sensing circuit 111 and a plurality of electronic components 113 may be disposed on the bottom surface 110b of the circuit board 110. The electronic components 113 may be electrically connected to the touch sensing circuit 111. The touch sensing circuit 111 is arranged in a grid structure, for example, and there are a plurality of openings 114 (only one of which is shown) between the grid structures. The openings 114 penetrate the circuit board 110. Figure 3B As shown, the openings 114 expose a lower surface 120 b of the front cover plate 120 ′, so that the light generated by the light emitting element 130 can enter the front cover plate 120 ′ through the openings 114 .
[0038] In summary, although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. A person skilled in the art of the present invention may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the claims.
Claims
1. A touch panel with luminous function, characterized in that: include: a circuit board; A front cover plate, disposed on the circuit board; as well as At least one light-emitting element is disposed on the circuit board. The front cover has a first thickness, and the circuit board has a second thickness. The front cover has a top surface, and the circuit board has a bottom surface, wherein the distance between the top surface and the bottom surface is equal to the sum of the first thickness and the second thickness.
2. The touch panel according to claim 1, wherein: The front cover plate has a side surface, the light emitting element is adjacent to the side surface of the front cover plate, and the light generated by the light emitting element enters the front cover plate through the side surface.
3. The touch panel according to claim 2, wherein: The front cover plate is a composite light guide plate, which includes a light guide material.
4. The touch panel according to claim 1, wherein: The front cover plate has a lower surface, the light emitting element is located at the lower side of the front cover plate, and the light generated by the light emitting element enters the front cover plate through the lower surface.
5. The touch panel according to claim 4, wherein: The circuit board has a concave hole, the light emitting element is accommodated in the concave hole, and the front cover plate covers the concave hole.
6. The touch panel according to claim 1, wherein: The light emitting element is located on the bottom surface of the circuit board, and the circuit board has a plurality of openings, which penetrate through the circuit board and expose a lower surface of the front cover.
7. The touch panel according to claim 6, wherein: The invention also comprises a light guide plate, which is arranged on the bottom surface of the circuit board, wherein the light guide plate covers the openings, and the light generated by the light emitting element enters the openings through the light guide plate.
8. A touch panel with luminous function, characterized in that: include: A circuit board having a bottom surface and a plurality of openings, the openings passing through the circuit board; A light guide plate, disposed on the bottom surface of the circuit board; as well as At least one light-emitting element is disposed on the bottom surface of the circuit board. The light emitting element and the light guide plate form a light guide structure for receiving light from the bottom side of the circuit board.
9. A touch panel with luminous function, characterized in that: include: A circuit board having a surface and at least one concave hole, the concave hole being concave inward from the surface; a light guide plate, disposed on the surface of the circuit board and covering the concave hole; and At least one light-emitting element is disposed in the concave hole of the circuit board.