US 11,755,123 B2
Illuminated keyboard
Chin-Chia Hsu, Taipei (TW)
Assigned to Lite-On Technology Corporation, Taipei (TW)
Filed by Lite-On Technology Corporation, Taipei (TW)
Filed on Jan. 20, 2022, as Appl. No. 17/579,608.
Claims priority of provisional application 63/145,490, filed on Feb. 4, 2021.
Claims priority of application No. 202123020429.1 (CN), filed on Dec. 3, 2021.
Prior Publication US 2022/0244792 A1, Aug. 4, 2022
Int. Cl. F21V 8/00 (2006.01); G06F 3/02 (2006.01); H01H 13/83 (2006.01)
CPC G06F 3/021 (2013.01) [G02B 6/0035 (2013.01); G02B 6/0055 (2013.01); G02B 6/0066 (2013.01); H01H 13/83 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An illuminated keyboard, comprising:
a backlight module, comprising:
a reflector;
a light guide plate, disposed on the reflector, wherein a surface of the light guide plate facing the reflector has a plurality of microstructures;
a light source, located on a light incident surface side of the light guide plate; and
a light shielding plate, disposed on the light guide plate, wherein the light shielding plate has a shielding area and a light transmissive area, and the plurality of microstructures are correspondingly disposed in the light transmissive area; and
a key structure, having a plurality of keycaps,
wherein the plurality of microstructures correspondingly disposed under any two of the plurality of keycaps adjacent to each other are arranged differently,
wherein in the plurality of microstructures correspondingly disposed under each of the plurality of keycaps, peaks of any two of the plurality of microstructures adjacent to each other keep different distances from the surface of the light guide plate facing the reflector, and distances of the peaks of the plurality of microstructures to the surface of the light guide plate facing the reflector is non-related to distances between the plurality of microstructures to the light source.