Backlight module having an optical switch element

Details Backlight module having an optical switch element Backlight module having an optical switch element

2007-09-11

2007-09-11

Ward, John Anthony (Department: 2885)

Illumination

Edge lighted panel

Light guide

C362S609000

Reexamination Certificate

active

11061347

ABSTRACT:
An exemplary backlight module (2) includes: a light guide plate (21) having an incident surface (211); a light source (23) facing toward the incident surface; a light source cover (25) partially covering the light source, a wall of the light source cover defining an opening located between the light source and the incident surface; and an optical switch element disposed between the light source and the incident surface and adjacent to the incident surface, and configured for adjusting the amount of light beams emitted by the light source that transmit through each of the opening and the incident surface. The optical switch element 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.

REFERENCES:
patent: 2480178 (1949-08-01), Zinberg
patent: 6254245 (2001-07-01), Uehara
patent: 6979115 (2005-12-01), Ohizumi et al.

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