Reflective color light filter and method of manufacture

Details Reflective color light filter and method of manufacture Reflective color light filter and method of manufacture

1992-05-19

1993-11-30

Lerner, Martin

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 22, 359 25, G02B 532, G03H 126

Patent

active

052670600

ABSTRACT:
A color matrix display including a color matrix reflective filter (10) having groups of reflective red, green and blue (R, G, B) color elements (12) arranged in subgroups (20). The elements (12) of each color group (R, B, G) in each subgroup (20) are aligned with pixel subgroups of a matrix control element or LCD (18). The color elements (12) of the reflective filter transmit light (26) of their associated color to an aligned pixel associated with that color and reflect back (30) light of other colors to a reflective light assembly (16) for reuse. The color matrix reflective filter (10) is made by selectively exposing selected areas of a holographic optical element, or HOE, with a light of colors other than the color desired to be transmitted by that element (12) of that selected area.

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