Patent ID: 11881363
Assignee: DARFON ELECTRONICS CORP.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC F  H

Claim 0:
1. A backlight module configured to illuminate at least one key cap, the backlight module comprising:
a light emitting unit;
a light guide plate having a light guide hole for accommodating the light emitting unit; and
a lighting board having a pair of pads connected to the light emitting unit respectively, the lighting board comprising a first reflective layer surrounding the light emitting unit and at least partially covering the pair of pads;
wherein each of the pair of pads has a plurality of branches and at least one hollow area, and the at least one hollow area overlaps with at least one part of the light emitting unit;
wherein an inner ring section of the first reflective layer at least partially covers the plurality of branches and the at least one hollow area, and the inner ring section reflects and diffuses light of the light emitting unit.