Gradation correction apparatus

Details Gradation correction apparatus Gradation correction apparatus

2006-04-25

2006-04-25

Hsia, Sherrie (Department: 2614)

Television

Image signal processing circuitry specific to television

Gray scale transformation

C348S679000, C348S712000

Reexamination Certificate

active

07034896

ABSTRACT:
The present invention provides a gradation correction device which can perform gradation correction using digital feedback processing, and furthermore, can control the digital feedback processing with high accuracy. The gradation correction device is provided with a correction gain adjustable amount generation circuit (103) and a correction gain generation circuit (104), and the correction gain adjustable amount generation circuit (103) obtains a correction gain adjustable amount which is non-linear in relation to a difference S between a reference luminance level Yb1and a maximum luminance level, and greater gamma correction is carried out as the value of the difference is larger.

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patent: 10248024 (1998-09-01), None
patent: 2001136411 (2001-05-01), None

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