Computer graphics processing and selective visual display system – Display driving control circuitry – Intensity or color driving control
Reexamination Certificate
2004-10-07
2010-11-30
Awad, Amr (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Intensity or color driving control
C345S089000
Reexamination Certificate
active
07843473
ABSTRACT:
Gamma converter circuits use first to third types of first and second gamma-characteristics to gamma-convert an input video signal. Selectors select one pair among three pairs of gamma-characteristics in accordance with a transmittance to be used for display, and selects one of the six gamma corrected outputs such that both a distribution area ratio of pixels driven by the video signal as gamma corrected by use of the first gamma-characteristic of the selected pair of gamma characteristics and a distribution area ratio of pixels driven by the video signal as γ corrected by use of the second gamma-characteristic of the selected pair of gamma-characteristics are equal to a distribution area ratio specified in advance for the selected pair of gamma-characteristics.
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Supplementary European Search Report issued May 7, 2008 in the Application No. EP 04 79 2420.
Arimoto Katsuyuki
Kobayashi Takahiro
Matsumoto Keizo
Ohta Yoshihito
Awad Amr
Cerullo Liliana
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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