Computer graphics processing and selective visual display system – Display driving control circuitry – Waveform generator coupled to display elements
Reexamination Certificate
2008-04-22
2011-12-20
Lao, Lun-Yi (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Waveform generator coupled to display elements
C345S094000, C345S089000, C345S092000, C345S100000, C345S204000, C345S096000
Reexamination Certificate
active
08081178
ABSTRACT:
Pixels include liquid crystal capacitors and holding capacitors having first ends connected to pixel electrodes and second ends connected to common electrodes corresponding to the first to 320th rows. A common electrode driving circuit includes TFTs for individual rows. In a partial mode, when a period in which a level of a scanning signal is high is long, a control signal Vg-c is brought to a high level during the period so that the TFTs are turned on. Since gate voltages are applied to the TFTs, a problem in that the gate voltages are reduced due to voltage leakage and the common electrodes are brought into high-impedance states is avoided. Alternatively, potentials of the common electrodes are fixed to a voltage of a common signal, which is a low-level when positive-polarity writing is specified to all the rows and a high-level when negative-polarity writing is specified to all the rows.
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U.S. Appl. No. 11/812,348, filed Jun. 18, 2007, Shin Fujita.
Hegarty Kelly B
K&L Gates LLP
Lao Lun-Yi
Sony Corporation
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