BACKLIGHT MODULE AND DISPLAY DEVICE
    3.
    发明申请

    公开(公告)号:US20190086599A1

    公开(公告)日:2019-03-21

    申请号:US15916307

    申请日:2018-03-09

    CPC classification number: G02B6/003 G02B6/0016 G09G3/22 H05B33/0803

    Abstract: 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.

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