Tone correcting system for a display

Patent 5929835 Issued on July 27, 1999. Estimated Expiration Date:

September 12, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventor

Sakamoto, Mitsunao

Application

No. 527180 filed on 09/12/1995

US Classes:

345/589, Color or intensity348/674Nonlinear amplitude modification (e.g., gamma)

Examiners

Primary: Mengistu, Amare

Attorney, Agent or Firm

Nikaido, Marmelstein, Murray & Oram LLP

International Classes

G09G 005/00
H04N 001/40

Foreign Application Priority Data

1993-07-19 JP

Abstract

An A/D converter is provided for converting input video signal to a tone control unit is provided to produce a control signal a value of which increases non-linearly with respect to an input value. A modulator is provided for generating a driving signal for driving a display panel. The driving signal is modulated in dependence on the tone data and the control signal.