Image display apparatus, correction circuit thereof and...

Computer graphics processing and selective visual display system – Display driving control circuitry – Waveform generator coupled to display elements

Reexamination Certificate

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Details

C345S055000, C345S077000, C345S063000

Reexamination Certificate

active

08054305

ABSTRACT:
A correction circuit includes a timing control circuit for dividing a drive period assigned for drive of display devices into plural calculation slots, a luminance calculation circuit for calculating luminance including an effect of a voltage drop for each calculation slot, an accumulation circuit for temporally accumulating the luminance for each calculation slot, a corrected data determination circuit for outputting, as a corrected data, the value determined in accordance with the calculation slot at the time point when the accumulated luminance reaches a target luminance value, and a conversion circuit for converting the corrected data into modulation data to be applied to a modulation circuit. The width of the calculation slot is shorter than the width of the slot for pulse width modulation in at least a part of the drive period. The conversion circuit reduces the bit width of the corrected data by pseudo-gradation processing.

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