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Contrast control for display device
US8976192B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8976192-B2 |
| Application number | US-201113178106-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 7, 2011 |
| Priority date | Jul 9, 2010 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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A contrast control device is provided. The device of the invention includes a detecting unit, a judging unit, a backlight control unit, a gain generating unit and a contrast gain processing unit. The detecting unit calculates an average value and detects a maximum value of a current image. The judging unit generates a gain index and a brightness index according to the average value. The backlight control unit generates a backlight control signal according to the brightness index. The gain generating unit generates a first contrast gain value and a soft-clamping gain value according to the gain index, the average value and the maximum value and then selects one from the first contrast gain value and the soft-clamping gain value for output as a second contrast gain value according to an input pixel value of the current image. The contrast gain processing unit generates an output pixel value according to the second contrast gain value and the input pixel value.
First claim
Opening claim text (preview).
What is claimed is: 1. A contrast control device, comprising: a detecting unit, for calculating an average value and detecting a maximum value according to a plurality of pixels of a current image; a judging unit, for generating a gain index and a brightness index according to the average value; a backlight control unit, for generating a backlight control signal according to the brightness index; a gain generating unit, coupled to the detecting unit, for generating a first c…
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Physics · mapped topic
Physics · mapped topic
- G09G3/3406Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US8976192B2 cover?
- A contrast control device is provided. The device of the invention includes a detecting unit, a judging unit, a backlight control unit, a gain generating unit and a contrast gain processing unit. The detecting unit calculates an average value and detects a maximum value of a current image. The judging unit generates a gain index and a brightness index according to the average value. The backlig…
- Who is the assignee on this patent?
- Huang Pei-Chen, Lee Yu-Chung, Hsu Shih-Yu, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G09G3/3406. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 10 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).