Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-06-07
2009-08-04
Le, Que T (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S231100
Reexamination Certificate
active
07569805
ABSTRACT:
An apparatus for measuring the position of the mirror of a diffractive light modulator and performing positional compensation, and a method of controlling the apparatus. A position measurement unit measures the position of a mirror of the diffractive light modulator. A control unit calculates the value of displacement from a reference position by evaluating a position value calculated by the position measurement unit, calculates a compensation value and outputs a compensation control signal. A compensation and actuation unit performs compensation on a drive voltage in response to the compensation control signal, and actuates the mirror of the diffractive light modulator using the compensated drive voltage.
REFERENCES:
patent: 6479811 (2002-11-01), Kruschwitz et al.
patent: 6898377 (2005-05-01), LeHoty et al.
patent: 2001-296482 (2001-10-01), None
patent: 10-2005-0043801 (2005-05-01), None
An Seung Do
Yun Sang Kyeong
Christensen O'Connor Johnson & Kindness PLLC
Le Que T
Samsung Electro-Mechanics Co. Ltd.
Williams Don
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