Patent ID: 9383497
Filing Date: 2016-07-05
CPC Classification: G02B

Claim Text:
1. A backlight module, comprising: a light guiding plate including a first surface, a second surface opposite to the first surface, a light incident surface connecting to the first surface and the second surface, and a side surface opposite to the light incident surface and connecting to the first surface and the second surface, wherein a thickness of at least part of the light guiding plate decreases progressively from the side surface towards the light incident surface; a light source being disposed beside the light incident surface and configured to emit a light beam, wherein the light beam enters the light guiding plate through the light incident surface; and a block being disposed beside the side surface and including a reflecting surface facing the side surface, wherein the reflecting surface is a concave surface recessed into the block, the reflecting surface is configured to reflect the light beam back to the side surface, and an air space is provided between the reflecting surface and the side surface.