US 12,354,815 B2
Lighting keyboard, backlight module and lighting board
Ying-Lan Liu, Taoyuan (TW); and Heng-Yi Huang, Taoyuan (TW)
Assigned to DARFON ELECTRONICS CORP., Taoyuan (TW)
Filed by DARFON ELECTRONICS CORP., Taoyuan (TW)
Filed on Apr. 7, 2023, as Appl. No. 18/131,885.
Application 18/131,885 is a continuation in part of application No. 18/127,667, filed on Mar. 29, 2023, abandoned.
Claims priority of provisional application 63/325,623, filed on Mar. 31, 2022.
Claims priority of provisional application 63/430,675, filed on Dec. 7, 2022.
Claims priority of provisional application 63/378,261, filed on Oct. 4, 2022.
Claims priority of provisional application 63/453,761, filed on Mar. 22, 2023.
Claims priority of application No. 112112546 (TW), filed on Mar. 31, 2023.
Prior Publication US 2023/0377816 A1, Nov. 23, 2023
Int. Cl. H01H 13/83 (2006.01); F21V 8/00 (2006.01); H01H 13/705 (2006.01)
CPC H01H 13/83 (2013.01) [G02B 6/0021 (2013.01); G02B 6/0055 (2013.01); H01H 13/705 (2013.01); H01H 2219/04 (2013.01); H01H 2219/06 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A backlight module for emitting at least one keycap, the backlight module comprising:
two lighting units;
a light guide panel having two panel holes for accommodating the two lighting units, the light guide panel further comprising at least one slot located between the two lighting units;
a lighting board disposed in parallel to the light guide panel, the lighting board having at least one pair of non-intersecting main traces electrically connected to the two lighting units; and
a micro-structure layer disposed in parallel to the light guide panel, the micro-structure layer comprising at least one micro-structure region;
wherein the at least one micro-structure region is located between the two lighting units, and the at least one slot of the light guide panel is at least partially located in the micro-structure region.