Keyboard backlight module and applications thereof
AssigneesLite-On Electronics (Guangzhou) Limited, Lite-On Technology Corporation
InventorHsin-Chih Liang
Life of this patent
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Abstract
A keyboard backlight module includes a light guide plate, a reflector, a light-emitting device and a first microstructure. The light guide plate has an output surface, a light guide pattern and a bottom surface disposed on an opposite side of the output surface. The light guide pattern is arranged on at least one of the bottom surface and the output surface. The reflector has a reflecting surface facing the bottom surface. The light-emitting device is disposed on one side of the light guide plate and configured to provide an incident light to the reflecting surface. The first microstructure is disposed on the reflecting surface, at least partially overlaps with the light guide pattern, and is configured to transform the incident light into a first reflected light.
Claims17
A backlit keyboard, comprising:
- a key switch;
- and
- a backlight module, comprising:
- a light guide plate, having an output surface and a bottom surface opposite to the output surface, wherein the light guide plate comprises light-guiding dots disposed on at least one of the bottom surface and the output surface corresponding to the key switch;
- a light-shielding layer disposed on the light guide plate, wherein the light-shielding layer has a light-shielding portion and a light-transmitting portion corresponding to the key switch;
- a reflector, having a reflecting surface facing the bottom surface of the light guide plate;
- a pattern disposed on the reflecting surface, and at least partially overlapping the light-shielding portion;
- and
- at least one light-emitting device disposed in a first opening of the reflector and a second opening of the light guide plate at a position corresponding to the light-shielding portion.
A backlit keyboard, comprising:
- a plurality of key switches;
- and
- a backlight module, comprising:
- a light guide plate, having an output surface and a bottom surface opposite to the output surface, wherein the light guide plate comprises a light guide pattern disposed on at least one of the bottom surface and the output surface, and the light guide pattern comprises light-guiding dots spaced from each other;
- a reflector, having a reflecting surface facing the bottom surface of the light guide plate;
- a pattern disposed on the reflecting surface, wherein the pattern comprises light-absorbing features spaced from each other, and a distance between two adjacent light-absorbing features is greater than a distance between two adjacent light-guiding dots;
- and
- a light-emitting device disposed on one side of the light guide plate.
Dependencies are inferred from the claim text.