Calfee, Halter & Griswold LLP
Backlight module and display device
A backlight module includes: a light guide plate; a light source for emitting light rays towards a first region of the light guide plate; a first grating provided at the first region and configured to adjust propagation directions of the light rays such that the adjusted light rays travel towards a second region of the light guide plate, and the propagation directions make an included angle with a normal to the light guide plate which is greater than the critical angle of total reflection of the light guide plate; and a second grating provided at the second region and configured to collimate the adjusted light rays such that the collimated light rays travel in a direction perpendicular to the light guide plate.
BOE TECHNOLOGY GROUP CO., LTD.
G G H G G G
G02B G02B H05B G09G G02B G02B
inventional inventional inventional inventional additional inventional
Wei Xiandong Xiaochuan Xianqin Jifeng Jian
Wang Meng Chen Meng Tan Gao