Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2005-03-08
2005-03-08
Tran, Henry N. (Department: 2674)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S087000
Reexamination Certificate
active
06864883
ABSTRACT:
A matrix display device (100) comprises an array of pixels (25) for producing a display output in response to voltages applied by drive circuit means (10,16,68). Each pixel (25) has a cell (18) comprising electro-optical material between two electrodes (5,6), the polarity of the voltage applied across the electrodes of each cell being periodically inverted. The device includes correction means (72) for modifying voltages generated by the drive circuit means (10,16,68) to compensate for display artefacts, such as flicker. The correction means comprises a measurement pixel (25a) and means for generating for each of the voltage polarities applied across the electrodes (18a) of the cells (18) a respective signal indicative of the capacitance of the measurement pixel cell, the correction means (72) modifying voltages generated by the drive circuit means (10,16,68) in response to said signals.
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Deane Steven C.
Hector Jason R.
Koninklijke Philips Electronics , N.V.
Tran Henry N.
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