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In-plane-switching liquid crystal display unit
   
Document Number
US Patent 7495734
Issued Date
February 24, 2009
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Abstract
An in-plane-switching liquid crystal display unit has a two-dimensional matrix of pixel regions each including a first auxiliary region and a second auxiliary region. When no electric field is applied, liquid crystal molecules in the first and second auxiliary regions are directed in respective orientations that lie at 90.degree. with respect to each other. When a voltage is applied, the liquid crystal molecules are rotated in the same direction while maintaining their orientations in the first and second auxiliary regions at 90.degree. with respect to each other. Alternatively, the liquid crystal molecules in the first and second auxiliary regions are directed in the same orientation when no electric field is applied, and when a voltage is applied, the liquid crystal molecules are rotated 15 opposite directions while maintaining their orientations in symmetric relationship.
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Number of Claims:
15
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Owner
NEC Corporation (Tokyo,JP)
Published
February 24, 2009
Application Number
11/128,237
Filed
May 13, 2005
US Classification
349/141   349/129 349/143
Int'l Classification
G02F   1/1343   (20060101)   G02F   1/1337   (20060101)  
Examiner
Assistant Examiner
Attorney/Law Firm
Parent Case
This is a continuation of application Ser. No. 10/350,077, filed Jan. 24, 2003, now U.S. Pat. No. 6,987,551 which is a divisional of application Ser. No. 08/965,619, filed Nov. 6, 1997, now U.S. Pat. No. 6,583,839, issued on Jun. 24, 2003; the disclosure of which is incorporated herein by reference.
Priority Data
Nov 06, 1996 [JP] 96/293897 Mar 06, 1997 [JP] 97/051899 Apr 28, 1997 [JP] 97/111160
USPTO Field of Search
349/141   349/142  
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