Display device

Details Display device Display device

2004-11-29

2008-05-20

Mjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S095000, C345S099000, C345S212000

Reexamination Certificate

active

07375725

ABSTRACT:
Gamma correction of a video signal voltage applied to respective pixels of a display device can be accomplished without modulating a ramp voltage. The display device includes a common voltage generating circuit which selectively outputs a high-potential-side common voltage or a low-potential-side common voltage to common electrodes in response to an alternating signal, a data storage circuit, a reference data generating circuit which, a ramp voltage generating circuit, a plurality of comparing circuits which compare data stored in the data storage circuit and the reference data generated by the reference data generating circuit, and a plurality of sampling circuits which sample the ramp voltage generated by the ramp voltage generating circuit in response to comparison results of the comparing circuits and output the sampled ramp voltage as a video signal voltage to respective video lines. The reference data generated by the reference data generating circuit is changed non-linearly with respect to time.

REFERENCES:
patent: 6384806 (2002-05-01), Matsueda et al.
patent: 2002/0063703 (2002-05-01), Furuhashi et al.
patent: 2004/0135778 (2004-07-01), Sato et al.
patent: 6-178238 (1994-06-01), None
patent: 11-272242 (1999-10-01), None

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