Light guide structure and light-emitting keyboard device

Patent metadata

Field	Value
Publication number	US-11087936-B2
Application number	US-202016799835-A
Country	US
Kind code	B2
Filing date	Feb 25, 2020
Priority date	Apr 16, 2019
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

The invention provides a light guide structure, adapted to be disposed under a baseplate of a keyboard module. The light guide structure includes: a light guide plate, a mask layer and a reflective layer. The light guide plate includes a first surface, a second surface opposite to the first surface, and a first opening running through the first and second surfaces. The mask layer is located between the baseplate and the light guide plate, and includes a second opening corresponding to the first opening. The reflective layer includes a first part and a second part connected to each other, wherein the first part is disposed on the second surface of the light guide plate, and the second part runs through the first opening and is disposed on a lower surface of the baseplate. The invention further provides a light-emitting keyboard device.

First claim

What is claimed is:

1. A light guide structure, adapted to be disposed under a baseplate of a keyboard module, wherein the light guide structure comprises:
a light guide plate, comprising a first surface, a second surface opposite to the first surface, and a first opening running through the first surface and the second surface;
a mask layer, located between the baseplate and the light guide plate and comprising a second opening corresponding to the first opening; and
a reflective layer, comprising a first part and a second part connected to each other, wherein the first part is disposed on the second surface of the light guide plate, and the second part runs through the first opening to physically contact a lower surface of the baseplate,
wherein the baseplate is an integrally formed layer.

2. The light guide structure according to claim 1 , wherein the second part of the reflective layer comprises a third opening corresponding to the second opening and the first opening, and the third opening is smaller than the second opening and the first opening.

3. The light guide structure according to claim 1 , wherein the reflective layer is a ground metal layer.

4. The light guide structure according to claim 1 , wherein the second opening is smaller than or equal to the first opening.

5. The light guide structure according to claim 1 , wherein the second opening is larger than the first opening.

6. A light-emitting keyboard device, comprising:
a frame, comprising a fixing member;
a light guide structure, disposed under the frame and comprising:
a light guide plate, comprising a first surface, a second surface opposite to the first surface, and a first opening running through the first surface and the second surface;
a mask layer, located between the baseplate and the light guide plate and comprising a second opening corresponding to the first opening; and
a reflective layer, comprising a first part and a second part connected to each other, wherein the first part is disposed on the second surface of the light guide plate, the second part runs through the first opening to physically contact a lower surface of the baseplate, and the second part comprises a third opening;

a keyboard module, disposed in the frame, wherein the keyboard module comprises:
a baseplate, comprising a fourth opening;
a thin film circuit layer, disposed on the baseplate and comprising a fifth opening corresponding to the fourth opening; and
a plurality of keys, disposed on the thin film circuit layer; and

a light source, disposed on a light incident surface of the light guide plate,
wherein the fixing member runs through the fifth opening, the fourth opening and the third opening, and an abutting portion of the fixing member abuts against a bottom surface of the second part, and
the baseplate is an integrally formed layer.

7. The light-emitting keyboard device according to claim 6 , wherein the third opening is smaller than the second opening and the first opening, and the third opening is larger than the fourth opening.

8. The light-emitting keyboard device according to claim 6 , wherein the second part of the reflective layer is not glued on the lower surface of the baseplate.

9. The light-emitting keyboard device according to claim 6 , wherein the fixing member is a hot melt pole, a screw, or two clamping hooks suitable for being combined or separated.

10. The light-emitting keyboard device according to claim 6 , wherein a periphery of the fourth opening is plate-shaped.

11. The light-emitting keyboard device according to claim 6 , wherein the fixing member is flush with or does not exceed the first part of the reflective layer.

12. The light-emitting keyboard device according to claim 6 , wherein the fixing member exceeds the first part of the reflective layer.

13. The light-emitting keyboard device according to claim 6 , wherein a light shield layer is disposed around the fourth opening on an upper surface of the baseplate.

14. The light-emitting keyboard device according to claim 6 , wherein the reflective layer is a ground metal layer.

15. The light-emitting keyboard device according to claim 6 , wherein the second opening is smaller than or equal to the first opening.

16. The light-emitting keyboard device according to claim 6 , wherein the second opening is larger than the first opening.

17. The light guide structure according to claim 1 , wherein the second part attached to the lower surface of the baseplate is located on a same plane with the mask layer.

18. The light-emitting keyboard device according to claim 6 , wherein the second part attached to the lower surface of the baseplate is located on a same plane with the mask layer.

Assignees

• Lite On Electronics Guangzhou
• Lite On Technology Corp

Inventors

• Chen Yi-Wen

Classifications

• G02B6/0055

  Reflecting element, sheet or layer · CPC title

• H01H13/83 Primary

  characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements · CPC title

• G02B6/005

  provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title

• H01H2229/032

  Screw · CPC title

• H01H2219/062

  Light conductor · CPC title