Liquid crystal display device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5977940
SERIAL NO

08812738

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Each pixel of a liquid crystal display device comprises a switching device for selecting a data signal, a memory portion for storing the data signal selected by the switching device and outputting an analog signal corresponding to the data signal, and a circuit for supplying an AC voltage corresponding to the analog signal to the liquid crystal layer. The liquid crystal layer is driven with a data signal stored in the memory portion or with an AC voltage corresponding to an analog signal corresponding to the data signal. With the signal stored in the memory portion, an AC voltage whose effective value or average value is controlled is supplied to the liquid crystal layer. Thus, unless a picture on the display is changed, since it is not necessary to supply the data signal, the peripheral driving circuit can be stopped. Consequently, although a picture is displayed in gradation mode, the power consumption can be remarkably reduced.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
KABUSHIKI KAISHA TOSHIBATOKYO20891

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akiyama, Masahiko Tokyo, JP 58 1863
Hioki, Tsuyoshi Yokohama, JP 57 1003
Itoh, Goh Tokyo, JP 89 1745
Motai, Tomonobu Yokohama, JP 7 277
Okumura, Haruhiko Fujisawa, JP 104 1781

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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OPTRON INC., (1)
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National Semiconductor Corporation (1)
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APPLE INC. (1)
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U.S. PHILIPS CORPORATION (1)
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KABUSHIKI KAISHA TOSHIBA (2)
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PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD. (1)
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THOMSON CONSUMER ELECTRONICS S.A. (1)
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HITACHI, LTD. (1)
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NORTEL NETWORKS LIMITED (1)
* 5339090 Spatial light modulators 103 1992
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
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SEIKO EPSON CORPORATION (6)
6873310 Display device 28 2001
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SONY CORPORATION (1)
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SAMSUNG ELECTRONICS CO., LTD. (1)
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GE BETZ (1)
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7064736 Liquid crystal display device 0 2004
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AU OPTRONICS CORPORATION (1)
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RYO HOLDINGS, LLC (1)
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TPO HONG KONG HOLDING LIMITED (2)
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KABUSHIKI KAISHA TOSHIBA (4)
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LG DISPLAY CO., LTD. (4)
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7755570 Microdisplay and interface on a single chip 1 2007
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7932875 Microdisplay and interface on a single chip 3 2010
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CANON KABUSHIKI KAISHA (2)
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SHARP KABUSHIKI KAISHA (6)
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PRIME VIEW INTERNATIONAL CO., LTD. (1)
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Semiconductor Energy Loboratory Co., Ltd. (1)
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FRANCE BREVETS (2)
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HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (2)
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Syndiant, Inc. (8)
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8089431 Instructions controlling light modulating elements 0 2006
8035627 Bit serial control of light modulating elements 0 2006
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8120597 Mapping pixel values 1 2006
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8558856 Allocation registers on a spatial light modulator 0 2012
8766887 Allocating registers on a spatial light modulator 0 2013
 
BEIJING XIAOMI MOBILE SOFTWARE CO., LTD. (1)
* 6731306 Display panel 6 2001
 
SAMSUNG DISPLAY CO., LTD. (1)
* 7095391 Low power LCD 12 2001
 
GOLD CHARM LIMITED (5)
* 6590553 Liquid crystal display device and method for driving the same 31 2000
7362304 Liquid crystal display device and method for driving the same 16 2003
* 2004/0056,831 Liquid crystal display device and method for driving the same 10 2003
7564443 Liquid crystal display device and method for driving the same 9 2008
* 2008/0158,140 LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME 10 2008
 
FUJITSU LIMITED (2)
* 7167168 Display device and method for driving display device 4 2004
* 2004/0196,230 Display device and method for driving display device 2 2004
 
CITIZEN HOLDINGS CO., LTD. (1)
6804029 Liquid crystal shutter 2 2001
 
JAPAN DISPLAY WEST INC. (2)
* 7825885 Display device 10 2006
* 2007/0188,431 Display device 18 2006
 
MAXIM INTEGRATED PRODUCTS, INC. (1)
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SANYO ELECTRIC CO., LTD. (33)
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7081875 Display device and its driving method 4 2001
7019727 Display device 1 2001
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6853371 Display device 62 2001
* 2002/0036,627 Display divice 3 2001
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6825834 Active matrix display device 6 2001
6671023 Active matrix display device 2 2001
7173589 Display device 7 2002
7123233 Display device 2 2002
7038650 Display device 1 2002
7027026 Display device 3 2002
6885359 Display device with selective rewriting function 1 2002
6873321 Display device with two-level image representation 2 2002
* 2002/0190,969 Display device 1 2002
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6950080 Display device 4 2002
6803896 Display device 6 2002
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6956553 Active matrix display device 11 2002
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7432898 Active matrix display device 1 2005
* 2005/0280,621 Active matrix display device 3 2005
7518571 Display device 0 2005
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7808495 Display device and its control method 10 2006
* 2006/0132,421 Display device and its control method 1 2006
 
DUKE UNIVERSITY (2)
7460101 Frame buffer pixel circuit for liquid crystal display 2 2005
* 2006/0001,634 Frame buffer pixel circuit for liquid crystal display 4 2005
 
National Semiconductor Corporation (1)
* 6437839 Liquid crystal on silicon (LCOS) display pixel with multiple storage capacitors 18 1999
 
WISTRON CORPORATION (3)
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6329974 Electro-optical material-based display device having analog pixel drivers 52 1998
6795064 Electro-optical material-based grey scale generating method 49 2001
 
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INTEL CORPORATION (5)
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VENTURE LENDING & LEASING IV, INC. (8)
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Manning Ventures, Inc. (2)
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MITSUBISHI ELECTRIC CORPORATION (1)
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AVENPORE PROPERTIES LIMITED LIABILITY COMPANY (2)
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Semiconductor Energy Laboratory Co., Ltd. (62)
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7411535 D/A conversion circuit and semiconductor device 2 2004
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7518592 Liquid crystal display device 3 2007
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* 2007/0146,265 Display device 5 2007
7791610 Display device and display system using the same 0 2007
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8760376 Liquid crystal display device, method of driving the same, and method of driving a portable information device having the liquid crystal display device 1 2007
8018412 Display device 0 2007
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8866984 Display device and manufacturing method thereof 1 2011
9013389 Display device 0 2011
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9697788 Liquid crystal display device 0 2011
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9147368 TFT arrangement for display device 1 2014
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9117732 Display device and manufacturing method thereof 0 2014
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AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD. (1)
6249269 Analog pixel drive circuit for an electro-optical material-based display device 60 1998
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
6756953 Liquid crystal display device implementing gray scale based on digital data as well as portable telephone and portable digital assistance device provided with the same 13 2000
 
Semiconductor Laboratory Co., Ltd. (1)
8669928 Display device 0 2013
 
ATMEL GRENOBLE (1)
* 2007/0057,890 Liquid crystal microdisplay 2 2004
* Cited By Examiner