Liquid crystal projector and adjusting method thereof
AssigneeSony Corporation
InventorsYoshiki Shirochi, Yuji Nagata, Hiroaki Endo
Life of this patent
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Abstract
In active driving of liquid crystal panels (R, G, and B) corresponding to R, G, and B color by X shift registers (R, G, and B) and Y shift registers (R, G, and B), alternating-current driving is performed such that signals to be written to the R color and B color liquid crystal panels are opposite in polarity to a signal to be written to the G color liquid crystal panel and also Vcom voltage of each of the liquid crystal panels is adjusted to thereby reduce flicker. The Vcom voltage supplied to the B color liquid crystal panel, for example, is finely adjusted to reduce flicker of a synthetic image of the liquid crystal panels.
Claims6
An adjusting method for a liquid crystal projector, said liquid crystal projector having a plurality of liquid crystal panels for forming a display frame by spatially combining pieces of light modulated by said plurality of liquid crystal panels with each other, said adjusting method comprising the steps of:
- driving a pixel electrode of each of said liquid crystal panels by a R color signal, a G color signal and a B color signal, respectively, whose polarity is reversed in each frame;
- driving an opposite electrode of each of said liquid crystal panels by a video pattern formed by line reversal and also dot line reversal to the G color liquid crystal panel opposite to the liquid crystal panel for B color and the liquid crystal panel for R color, respectively.
A liquid crystal projector with a plurality of liquid crystal panels for forming a display frame by spatially combining pieces of light modulated by said plurality of liquid crystal panels with each other, said liquid crystal projector comprising:
- a driving circuit for driving a pixel electrode of each of said liquid crystal panels by a R color signal, a G color signal and a B color signal, respectively, whose polarity is reversed in each frame;
- a driving circuit for driving an opposite electrode of each of said liquid crystal panels by a video pattern formed by line reversal and also dot line reversal to the C color liquid crystal panel opposite to the liquid crystal panel for B color and the liquid crystal panel for R color, respectively.
Dependencies are inferred from the claim text.