Light guide structure

Abstract

The utility model relates to a light guide structure, which can be applied to various components of a keyboard device, a touchpad and a notebook computer or various forms of intelligent household appliances, the light guide structure comprises a light reflecting sheet, a light guide sheet, an anti-dazzling screen and a lateral light emitting type LED, the light guide sheet is arranged on the light reflecting sheet, and the light guide sheet is provided with a hole; the anti-dazzling screen is arranged on the light guide sheet and is provided with a light emitting structure; the lateral light-emitting type LEDs are arranged on the light reflecting pieces and contained in the holes. Therefore, interference with a heat dissipation structure of a system is avoided, and the thin use requirement of a product is met.

Description

Technical Field

[0001] This application relates to the technology of an input device, and more particularly to a light guide structure. Background Technology

[0002] With the advancement and development of technology, input devices such as keyboards and touchpads have become the medium for transmitting information between devices and users. However, some input devices do not emit light themselves and usually require an external light source to display clearly. Therefore, light-emitting elements are usually placed on one side of a light guide plate, and the light emitted by the light-emitting elements is evenly dispersed on the input device by the light guide plate.

[0003] However, existing light guide structures used in the aforementioned input devices, such as Figure 1 As shown, this light guide structure 1A mainly includes a reflector 10A, a light guide 20A, a light shield 30A, and a flexible circuit board light strip 40A, wherein the flexible circuit board light strip 40A protrudes below the reflector 10A.

[0004] The existing light guide structure has the following problems in actual use: because its flexible circuit board light strip 40A protrudes from the lower surface of the reflector 10A, it is prone to interference with the system's heat dissipation structure. In addition, the overall structure assembled from it is relatively thick, which does not meet the current design requirements of products that are light, thin, short, and small.

[0005] Therefore, overcoming the problems of the prior art is a major issue that the inventors are eager to address. Utility Model Content

[0006] One objective of this application is to provide a light guide structure that does not interfere with the heat dissipation structure of the system and meets the requirements for thinner product design.

[0007] To achieve the above objectives, this application provides a light guide structure, including a reflector, a light guide, a light shield, and a lateral light-emitting LED. The light guide is disposed on the reflector and has at least one hole; the light shield is disposed on the light guide and has at least two light-emitting structures; the lateral light-emitting LED is disposed on the reflector and housed in the hole.

[0008] In one embodiment, there are at least two holes and two side-emitting LEDs, each of which is housed in its respective hole.

[0009] In one embodiment, each of the side-emitting LEDs is electrically connected to each other.

[0010] In one embodiment, the hole is a perforation or a blind hole.

[0011] In an embodiment, the light guide sheet has an incident light surface, an exit light surface and a bottom surface, the incident light surface is located at one side of the hole, the exit light surface is arranged opposite to the bottom surface, and the incident light surface is adjacent to the exit light surface and the bottom surface.

[0012] In an embodiment, the light guide sheet has an incident light surface, an exit light surface and a bottom surface, the incident light surface is located at one side of the hole, the exit light surface is arranged opposite to the bottom surface, and the incident light surface is adjacent to the exit light surface and the bottom surface.

[0013] In an embodiment, the light guide sheet has an incident light surface, an exit light surface and a bottom surface, the incident light surface is located at one side of the hole, the exit light surface is arranged opposite to the bottom surface, and the incident light surface is adjacent to the exit light surface and the bottom surface.

[0014] The present application has the following effects: the light emitted by the side-emitting LED can be guided to the light guide sheet through the reflection surface of the light-reflecting sheet, so as to increase the use efficiency of the light emitted by the side-emitting LED. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other object features and advantages of the present application will become more apparent from the following detailed description of preferred embodiments thereof, with reference to the attached drawings. In the drawings, like reference numerals indicate like parts throughout the several views, and the drawings are not necessarily drawn to scale, with emphasis instead being placed upon illustrating the principles of the present application.

[0016] Figure 1 Figure 1A is a sectional view of a prior art light guide structure.

[0017] Figure 2 Figure 1A is a sectional view of a prior art light guide structure.

[0018] Figure 3 Figure 1A is a sectional view of a prior art light guide structure.

[0019] Figure 4 Figure 1A is a sectional view of a prior art light guide structure.

[0020] REFERENCE NUMERALS:

[0021] PRIOR ART

[0022] 1A: light guide structure

[0023] 10A: light-reflecting sheet

[0024] 20A: light guide sheet

[0025] 30A: light-shielding sheet

[0026] 40A: flexible circuit board light bar

[0027] THE PRESENT APPLICATION

[0028] 1: light guide structure

[0029] 10: light-reflecting sheet

[0030] 11: reflection layer

[0031] 20 light guide sheet

[0032] 21: hole

[0033] 22: light inlet surface

[0034] 23: light outlet surface

[0035] 24: bottom surface

[0036] 30: light blocking sheet

[0037] 31: light outlet structure

[0038] 40: side-emitting LED DETAILED DESCRIPTION

[0039] In the present specification, many specific details are provided to provide a thorough understanding of the specific embodiments of the present application; however, one skilled in the art should know that the purpose of the present application can still be achieved without one or more of these specific details; in other cases, well-known details are not shown or described to avoid obscuring the main technical features of the present application. The detailed description and technical content of the present application are described below in conjunction with the drawings; however, the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present application.

[0040] Referring to Figures 2 to 4 The present application provides a light guide structure which can be applied to various components of a keyboard device, a touchpad, a notebook computer, or various smart home appliances having a light emitting requirement. The light guide structure mainly includes a reflector 10, a light guide sheet 20, a light blocking sheet 30, and a side-emitting LED 40.

[0041] The reflector 10 has a light reflecting function. In some embodiments, the reflector 10 can be a white oil film having a reflective layer 11.

[0042] The light guide sheet 20 is disposed on the reflection layer 11 of the light reflection sheet 10, and is provided with at least one hole 21. The hole 21 can be a through hole or a blind hole. In this embodiment, four holes are provided. The material of the light guide sheet 20 can be poly methyl methacrylate (PMMA), cyclo olefin polymer (COP) or polycarbonate (PC). The light guide sheet 20 has an incident light surface 22, an emergent light surface 23 and a bottom surface 24. The incident light surface 22 is located at one side of each hole 21. The emergent light surface 23 is disposed opposite to the bottom surface 24. The incident light surface 22 is adjacent to the emergent light surface 23 and the bottom surface 24. A light source is disposed at one side of the incident light surface 22. The light emitted by the light source enters the light guide sheet 20 through the incident light surface 22 and is emitted through the emergent light surface 23.

[0043] The light shielding sheet 30 can be a photocuring ink layer or a thermocuring ink layer, and is disposed on the emergent light surface 23 of the light guide sheet 20. The light shielding sheet 30 is provided with at least two light emergent structures 31.

[0044] The side-emitting LED 40 is disposed on the light reflection sheet 10 and is accommodated in the hole 21. In this embodiment, four side-emitting LEDs 40 are accommodated in the respective holes 21, and the side-emitting LEDs 40 are electrically connected to each other.

[0045] In use, part of the light emitted by the side-emitting LED 40 is refracted by the light guide sheet 20 and is displayed from the light emergent structure 31 of the light shielding sheet 30. Another part of the light is reflected by the reflection layer 11 of the light reflection sheet 10 and is displayed from the light emergent structure 31 of the light shielding sheet 30.

[0046] In summary, the light-emitting film keyboard with the light guide layer can achieve the expected use purpose and effect, and can solve the problems of the prior art. Therefore, the patent application is proposed.

[0047] The above-described, only for the preferred embodiments of the present application, when not limited to the scope of the present application, namely, all made by the present application claims equivalent changes and modifications, etc., should still belong to the scope of the present application patent covered by the category of intent to protect. The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not on the above described in each of the technical features of all possible combinations have been described, however, as long as the combination of these technical features does not exist contradictions, should be considered as the scope of the present application. The present application can have other various embodiments, without departing from the spirit and essence of the present application, those skilled in the art can make various changes and modifications according to the present application, but these corresponding changes and modifications should belong to the scope of the present application claims.

Claims

1. A light guide structure, characterized by, The light guide structure comprises: a light reflecting sheet; a light guiding sheet disposed on the light reflecting sheet, the light guiding sheet being provided with at least one hole; a light shielding sheet disposed on the light guiding sheet, the light shielding sheet being provided with at least two light emitting structures; and a plurality of side-emitting LEDs disposed on the light reflecting sheet and accommodated in the at least one hole; wherein the light guiding sheet has an incident light surface, an emergent light surface and a bottom surface, the incident light surface is located on one side of the hole, the emergent light surface is arranged opposite to the bottom surface, the incident light surface is adjacent to the emergent light surface and the bottom surface, the side-emitting LEDs are arranged on one side of the incident light surface, and the light emitted by the side-emitting LEDs enters the light guiding sheet through the incident light surface and is emitted through the emergent light surface.

2. The light guide structure of claim 1, wherein, wherein the hole and the side-emitting LED are both at least two, each of the side-emitting LEDs is accommodated in each of the holes.

3. The light guide structure of claim 2, wherein, wherein each of the side-emitting LEDs is electrically connected to each other.

4. The light guide structure of claim 1, wherein, wherein the hole is a through hole or a blind hole.

5. The light guide structure of claim 1, wherein, wherein the light reflecting sheet has a reflecting surface, and the bottom surface of the light guiding sheet is disposed on the reflecting surface.

6. The light guide structure of claim 5, wherein the light shielding sheet is disposed on the emergent light surface of the light guiding sheet.

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