Modulation system for projection display

Details Modulation system for projection display Modulation system for projection display

H - Electricity

04

N

350/74

H04N 9/12 (2006.01) H04N 9/31 (2006.01)

Patent

CA 2018151

In a liquid crystal projection t.v, system the color gradient over the projected image, which is due to angular sensitivity of the dichroic mirrors, is minimized by introducing a field lens (61,62,53) next to the light values or LC-panels (21, 22, 23) in the light paths of the blue (b B), green (b G) and red (b R) beams. By chosing different length light paths before and after the light valves and LC-panels a difference in angular sensitivity of the separation mirror (41,42) and the recombination mirrors (52,53) can be compensated for.

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