Light recycling in a transflective LCD

Details Light recycling in a transflective LCD Light recycling in a transflective LCD

2004-09-15

2009-11-10

Caley, Michael H (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S096000, C349S098000, C349S113000, C349S115000

Reexamination Certificate

active

07616276

ABSTRACT:
The present invention provides for improved brightness and reduced power consumption in transflective displays operating in transmissive mode. The invention is based on the inclusion of a depolarizing means (206) between the transflector (201) and the rear stack polarizer (202). The depolarizer (206) is arranged to selectively depolarize light originating from the backlight (203) and reflected by the transflector (201), without substantially affecting the light that is transmitted through the transflector. Thereby part of the reflected light is transmitted back through the rear stack polarizer (202) and can be recycled in the backlight (203). The invention is applicable to any transflective display having a transflector (201) that changes polarization of light originating from the backlight (203) upon reflection back towards the backlight (202).

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