Panel drive circuit
US-12148402-B2 · Nov 19, 2024 · US
Image display apparatus and image correction method
US9024935B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9024935-B2 |
| Application number | US-200913260301-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 27, 2009 |
| Priority date | Mar 27, 2009 |
| Publication date | May 5, 2015 |
| Grant date | May 5, 2015 |
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- Title
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Abstract
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The present invention is aimed at appropriately suppressing display failure such as a tailing phenomenon and the like in a normally white type liquid crystal panel. A driver ( 3 ) supplies a drive voltage in conformity with an image signal received by an image signal processing circuit ( 1 ), to a liquid crystal panel ( 4 ). A histogram detector ( 5 ) detects a histogram representing the relationship between the signal level of the image signal received by the image signal processing circuit ( 1 ) and the number of pixels. A CPU ( 6 ) calculates, based on the histogram detected by the histogram detector ( 5 ), a first proportion of the number of pixels (on the white side) whose signal level is equal to or greater than a first defined value, to the total number of pixels of the histogram and a second proportion of the number of pixels (on the black side) whose signal level is equal to or smaller than a second defined value that is smaller than the first defined value, to the total number of pixels of the histogram. An amplifier ( 2 ) corrects the lower limit of the drive voltage that the driver ( 3 ) supplies to the liquid crystal panel ( 4 ) in accordance with the first proportion of white side pixels and second proportion of black side pixels calculated by CPU ( 6 ).
First claim
Opening claim text (preview).
What is claimed is: 1. An image display apparatus, comprising: a normally white type liquid crystal panel; an input unit that receives an image signal; a drive unit that supplies a drive voltage in conformity with the image signal received by the input unit to the liquid crystal panel to display an image represented by the image signal on the liquid crystal panel; a detection unit that detects a histogram representing a relationship between a signal level of the image signal…
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- G09G3/3611Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9024935B2 cover?
- The present invention is aimed at appropriately suppressing display failure such as a tailing phenomenon and the like in a normally white type liquid crystal panel. A driver ( 3 ) supplies a drive voltage in conformity with an image signal received by an image signal processing circuit ( 1 ), to a liquid crystal panel ( 4 ). A histogram detector ( 5 ) detects a histogram representing the relati…
- Who is the assignee on this patent?
- Ikeda Hiroaki, Jyou Shigenobu, Kobayashi Reiichi, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification G09G3/3611. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 05 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).