Title:
SIGNAL CORRECTING CIRCUIT
Document Type and Number:
Japanese Patent JPS6478076
Kind Code:
A
Abstract:
PURPOSE:To improve the picture quality of an image display device driven in a pixel unit to the best by applying correction in which different ways to correct are employed based on the value of an APL(average luminanace level) on a video signal. CONSTITUTION:A digital APL signal applied on an A/D converter 5 by setting as a high-order address, and a digital video signal applied on another A/D converter 6 by setting as a low-order address are inputted to a memory 7, and data corresponding to the address uniquely is outputted as a corrected digital video signal, and next, a timing is arranged by inputting outputted data to a flip-flop 8. Therefore, it is possible to apply the correction in which the different ways to correct are employed on the video signal as intended. In such a way, it is possible to improve the picture quality of the image display device driven by the pixel unit to the best with simple circuit constitution.
Inventors:
OTAKE KEIICHI
WATANABE TSUTOMU
WATANABE TSUTOMU
Application Number:
JP23513887A
Publication Date:
March 23, 1989
Filing Date:
September 18, 1987
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04N5/202; (IPC1-7): H04N5/202
Domestic Patent References:
| JPS58178667A | 1983-10-19 | |||
| JPS61258567A | 1986-11-15 | |||
| JPS5664570A | 1981-06-01 |
Attorney, Agent or Firm:
Tomoyuki Takimoto (1 person outside)