Patent ID: 11914185
Assignee: DARFON ELECTRONICS CORP.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC F  H

Claim 0:
1. A backlight keyswitch comprising:
a keyswitch body having a cap with at least one symbol formed thereon; and
a backlight module disposed under the cap, the backlight module comprising:
a light-blocking sheet having a transparent region corresponding to the cap;
a light guide plate disposed under the light-blocking sheet and having an accommodating hole;
a backlight circuit board disposed under the light guide plate and having a backlight source, the backlight source being disposed in the accommodating hole and comprising a first lighting unit, a second lighting unit, and a third lighting unit, wherein the first lighting unit, the third lighting unit, and the second lighting unit are arranged sequentially along a longitudinal direction for emitting a first color light, a third color light, and a second color light respectively to be incident to the transparent region after light mixing;
a first ink layer formed on the light-blocking sheet and located outside the first lighting unit, a color of the first ink layer at least corresponding to a color of the second color light to achieve a mixed color with the first color light; and
a second ink layer formed on the light-blocking sheet and located outside the second lighting unit for partially adjusting the second color light, a color of the second ink layer at least corresponding to a color of the first color light to achieve the mixed color with the second color light.