Patent ID: 8508684

Claim:
A backlight module comprising: a tray comprising a bottom plate and a side wall connecting an edge of the bottom plate, the side wall comprising: a first wall portion substantially perpendicular to the bottom plate; a second wall portion substantially parallel to the bottom plate, the second wall portion extending out of the tray; a third wall portion substantially perpendicular to the bottom plate, the second wall portion being connected between the first wall portion and the third wall portion; a fourth wall portion substantially parallel to the bottom plate, the fourth wall portion extending out of the tray; a fifth wall portion substantially perpendicular to the bottom plate, the fourth wall portion being connected between the third wall portion and the fifth wall portion; a light guide plate disposed on the bottom plate of the tray; a back frame surrounding the tray, the back frame and the tray leaning against each other, a bottom surface of the tray and a bottom surface of the back frame being substantially coplanar; a lighting device disposed at a light incident side of the light guide plate; and an optical film set disposed on the light guide plate, the second wall portion leaning against the optical film set.