US 12,259,574 B2
Lighting keyboard, backlight module and lighting board
Chao-Yu Chen, Taoyuan (TW); and Heng-Yi Huang, Taoyuan (TW)
Assigned to DARFON ELECTRONICS CORP., Taoyuan (TW)
Filed by DARFON ELECTRONICS CORP., Taoyuan (TW)
Filed on Oct. 4, 2023, as Appl. No. 18/376,818.
Claims priority of provisional application 63/453,761, filed on Mar. 22, 2023.
Claims priority of provisional application 63/439,158, filed on Jan. 16, 2023.
Claims priority of provisional application 63/413,579, filed on Oct. 5, 2022.
Claims priority of provisional application 63/378,261, filed on Oct. 4, 2022.
Claims priority of application No. 112138085 (TW), filed on Oct. 4, 2023.
Prior Publication US 2024/0134112 A1, Apr. 25, 2024
Prior Publication US 2024/0230982 A9, Jul. 11, 2024
Int. Cl. F21V 8/00 (2006.01); H01H 13/02 (2006.01)
CPC G02B 6/0091 (2013.01) [G02B 6/0068 (2013.01); H01H 13/023 (2013.01); H01H 2219/06 (2013.01); H01H 2219/062 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A backlight module for illuminating at least one keycap, the backlight module comprising:
a lighting unit;
a light guide panel having a panel hole to accommodate the lighting unit, the light guide panel further comprising a plurality of slots intervally surrounding the lighting unit; and
a lighting board having at least one pair of non-intersecting traces electrically connected to the lighting unit, the lighting board further comprising at least one micro-structure region located between the at least one pair of non-intersecting traces;
wherein at least one of the plurality of slots has a bulge portion facing toward the lighting unit, and a protruding direction of the bulge portion is parallel to the light guide panel.