US 12,253,706 B2
Lighting keyboard and backlight module
Chun-Tan Wu, Taoyuan (TW); and Heng-Yi Huang, Taoyuan (TW)
Assigned to DARFON ELECTRONICS CORP., Taoyuan (TW)
Filed by DARFON ELECTRONICS CORP., Taoyuan (TW)
Filed on Jul. 9, 2024, as Appl. No. 18/767,973.
Application 18/767,973 is a continuation in part of application No. 18/221,371, filed on Jul. 12, 2023.
Application 18/221,371 is a continuation in part of application No. 18/297,020, filed on Apr. 7, 2023, granted, now 11,881,363, issued on Jan. 23, 2024.
Application 18/297,020 is a continuation in part of application No. 18/127,667, filed on Mar. 29, 2023, abandoned.
Claims priority of provisional application 63/408,062, filed on Sep. 19, 2022.
Claims priority of provisional application 63/408,069, filed on Sep. 19, 2022.
Claims priority of provisional application 63/430,675, filed on Dec. 7, 2022.
Claims priority of provisional application 63/438,254, filed on Jan. 11, 2023.
Claims priority of provisional application 63/368,272, filed on Jul. 13, 2022.
Claims priority of provisional application 63/325,623, filed on Mar. 31, 2022.
Claims priority of provisional application 63/378,261, filed on Oct. 4, 2022.
Claims priority of provisional application 63/539,825, filed on Sep. 22, 2023.
Claims priority of application No. 111113486 (TW), filed on Apr. 8, 2022; application No. 112108658 (TW), filed on Mar. 9, 2023; application No. 112110265 (TW), filed on Mar. 20, 2023; application No. 112111749 (TW), filed on Mar. 28, 2023; application No. 112116725 (TW), filed on May 5, 2023; and application No. 113101164 (TW), filed on Jan. 11, 2024.
Prior Publication US 2024/0361509 A1, Oct. 31, 2024
Int. Cl. G06F 3/02 (2006.01); F21V 8/00 (2006.01)
CPC G02B 6/0031 (2013.01) [G02B 6/002 (2013.01); G06F 3/0202 (2013.01)] 21 Claims
OG exemplary drawing
 
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 at least one 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 at least one pair of pads;
wherein each of the at least one pair of pads has a plurality of branches and at least one hollow area, the at least one hollow area overlaps with at least one part of the light emitting unit, and at least one lighting area is located between the at least one pair of pads.