Patent ID: 6961035

Claim:
A liquid crystal projector apparatus which includes a plurality of liquid crystal panels for optically modulating light from a light source with an input signal and projects the optically modulated light from said plurality of liquid crystal panels to display an image, said liquid crystal projector apparatus comprising: a temperature sensor for indirectly detecting a temperature of each of said plurality of liquid crystal panels, a memory for storing temperature detection data obtained by said temperature sensor within a period from a power supply starting time to a steady operation entering time of said liquid crystal projector apparatus, arithmetic operation means for estimating a temperature of each of said plurality of liquid crystal panels by indirectly detecting a temperature of the temperature sensor and adding such temperature to a temperature of a time shift period of the power supply obtained from predetermined graphical relationship of starting time shift data for each of said plurality of liquid crystal panels, and a plurality of liquid crystal drive sections for correcting drive voltages for driving each of said plurality of liquid crystal panels with an output signal of said arithmetic operation means and applying the corrected drive voltages to each of said plurality of liquid crystal panels.