Liquid crystal display controller and liquid crystal display device

US8941578B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8941578-B2
Application numberUS-201313939975-A
CountryUS
Kind codeB2
Filing dateJul 11, 2013
Priority dateJan 30, 1997
Publication dateJan 27, 2015
Grant dateJan 27, 2015

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  2. Abstract

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  5. First independent claim

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Abstract

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In conventional liquid crystal display controllers, the display is reduced in the stand-by state but the liquid crystal display duty is not changed, i.e., even the common electrodes of the rows that are not producing display are scanned, and the consumption of electric power is not decreased to a sufficient degree in the stand-by state. A liquid crystal display controller includes a drive duty selection register capable of being rewritten by a microprocessor, and a drive bias selection register. When the display is changed from the whole display on a liquid crystal display panel to a partial display on part of the rows only, the preset values of the drive duty selection register and of the drive bias selection register are changed, so that the display is selectively produced on a portion of the liquid crystal display panel at a low voltage with a low-duty drive.

First claim

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The invention claimed is: 1. A liquid crystal display system comprising: a liquid display panel which has a plurality of first lines provided in a first direction and a plurality of second lines provided in a second direction different from the first direction; a liquid crystal display controller which is mounted with a TCP (tape carrier package), which is coupled to the liquid display panel and which drives the liquid display panel, the liquid crystal display controller being e…

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What does patent US8941578B2 cover?
In conventional liquid crystal display controllers, the display is reduced in the stand-by state but the liquid crystal display duty is not changed, i.e., even the common electrodes of the rows that are not producing display are scanned, and the consumption of electric power is not decreased to a sufficient degree in the stand-by state. A liquid crystal display controller includes a drive duty …
Who is the assignee on this patent?
Renesas Electronics Corp
What technology area does this patent fall under?
Primary CPC classification G09G3/3622. Mapped technology areas include Physics.
When was this patent published?
Publication date Tue Jan 27 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).