Backlight module having an optical switch element

Abstract

A backlight module (2) includes a light guide plate (21) having an incident surface (211), a light source (23) facing to the incident surface, and a light source cover (25) covering part of the light source and defining an opening, and light source cover an optical switch element adjacent to the incident surface, for con trolling light beams emitted by the light source to transmit through the opening or the incident surface or both the opening and the incident surface. The reflection plate can control the light beams to pass through the opening in order to provide illumination for taking of photos. Moreover, the backlight module can also be used as a backlight source to supply bright light for a display screen of a display device.

Dependencies are inferred from the claim text.