US 12,287,545 B2
Backlight module and display apparatus with backlight module
Masaru Yamaguchi, Jiangsu (CN); and Tomoya Mimura, Jiangsu (CN)
Assigned to WAYS ELECTRON CO., LTD., Suzhou (CN)
Filed by WAYS ELECTRON CO., LTD., Jiangsu (CN)
Filed on Dec. 8, 2023, as Appl. No. 18/533,170.
Application 18/533,170 is a continuation of application No. PCT/CN2023/113968, filed on Aug. 21, 2023.
Claims priority of application No. 202210718833.6 (CN), filed on Jun. 23, 2022.
Prior Publication US 2024/0103317 A1, Mar. 28, 2024
Int. Cl. G02F 1/13357 (2006.01)
CPC G02F 1/133605 (2013.01) [G02F 1/133615 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A backlight module, comprising:
a substrate, configured with a bearing surface;
a plurality of light sources, configured on the bearing surface;
a plurality of reflectors, positioned on the bearing surface of the substrate, and configured to surround the peripheries of all light sources, wherein
surfaces, facing the light sources, of the reflectors are multi-stage curved surfaces,
wherein in a vertical direction from the bearing surface to a direction away from the bearing surface, distances L between a plurality of stages of curved surfaces and a normal line of each of the light sources sequentially increase on the whole,
wherein each of the surfaces of the reflectors, facing each of the light sources, of each stage of curved surface is a concave cambered surface,
wherein a half of a radian of the concave cambered surface is a half of a center angle of a circle having an arc where the concave cambered surface is located, wherein the half of the center angle ranges from 10° to 25°, ensuring that the concave cambered surface is optimized to control a direction and uniform distribution of reflected light efficiently.