Patent ID: 7569805
Filing Date: 2009-08-04
Classification: G02B

Abstract:
1. An apparatus for measuring the position of a mirror of a diffractive light modulator used in a display system and performing compensation, the display system processing light diffracted from the diffractive light modulator for subsequent display, comprising: a position measurement unit for measuring the position of a mirror of the diffractive light modulator based on evaluating the light emitted from the diffractive light modulator at a location prior the display system; a control unit for calculating a value of displacement of the mirror from a reference position by evaluating a position value calculated by the position measurement unit, calculating a compensation value based on the displacement value and outputting a compensation control signal; and a compensation and actuation unit for performing compensation on a drive voltage in response to the compensation control signal input from the control unit, and actuating the mirror of the diffractive light modulator using the compensated drive voltage.