Patent ID: 8842067

Claim:
A display apparatus, characterized in that the display apparatus comprises: a display panel; and a backlight module, comprising: a light guide plate, having a bottom surface formed with only one single middle trench, and the middle trench comprises two dimming cants, a predetermined angle is formed between each of the dimming cants and the bottom surface and larger than 90 degrees, wherein the single middle trench is an elongated trench positioned at the middle of the bottom surface for promoting an out light brightness at the central area of the light guide plate; and a plurality of light sources, positioned at two opposite sides of the light guide plate in accordance with the dimming cants, wherein a light intensity distribution of the light guide plate is adjusted according to a top angle of the middle trench, a distance between a top end of the middle trench and an out light surface of the light guide plate, and a height between the bottom surface and a reflection layer of the light guide plate; wherein micro structures are formed on the bottom surface of the light guide plate and the dimming cants of the middle trench, and a distance between a top end of the middle trench and bottom surface is larger than a height of each of the micro structures.