Projection method and projector device

Details Projection method and projector device Projection method and projector device

H - Electricity

04

N

H04N 5/74 (2006.01) G02B 27/18 (2006.01) H04N 5/04 (2006.01) H04N 9/31 (2006.01) H04N 9/68 (2006.01)

Patent

CA 2349273

A single polarizer projector with a color switch and a projection method thereof, wherein the mean luminance of the inputted video signal is calculated so that the transmittance of the color switch can be controlled by the mean luminance in such a fashion that the transmittance is set to a maximum (100%) while setting the same to a low level (50%), thereby preventing unnaturail blackening of relatively dark image for improving the contrast ratio.

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