US Patent No: 5,977,940

Number of patents in Portfolio can not be more than 2000

Liquid crystal display device

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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 TOSHIBATOKYO25645

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akiyama, Masahiko Tokyo, JP 57 1655
Hioki, Tsuyoshi Yokohama, JP 57 846
Itoh, Goh Tokyo, JP 88 1575
Motai, Tomonobu Yokohama, JP 7 259
Okumura, Haruhiko Fujisawa, JP 104 1636

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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OPTRON INC., (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)
* 5,339,090 Spatial light modulators 98 1992
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
SEIKO EPSON CORPORATION (5)
6,873,310 Display device 28 2001
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SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD. (3)
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AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (1)
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SONY CORPORATION (1)
6,313,819 Liquid crystal display device 58 1998
 
GE BETZ (1)
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7,064,736 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)
7,230,597 Active matrix array devices 8 2002
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CALLAHAN CELLULAR L.L.C. (2)
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OMNIVISION TECHNOLOGIES, INC. (1)
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KABUSHIKI KAISHA TOSHIBA (4)
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LG DISPLAY CO., LTD. (4)
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CITIZEN FINEDEVICE CO., LTD. (11)
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7,283,105 Microdisplay and interface on single chip 21 2004
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7,755,570 Microdisplay and interface on a single chip 1 2007
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8,816,999 Adjustment of liquid crystal display voltage 0 2011
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INNOLUX CORPORATION (2)
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JAPAN DISPLAY INC. (3)
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CANON KABUSHIKI KAISHA (2)
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SHARP KABUSHIKI KAISHA (6)
* 6,724,358 Active matrix type display apparatus and method for driving the same 10 2001
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PRIME VIEW INTERNATIONAL CO., LTD. (1)
* 2003/0067,435 Adaptive gamma curve correction apparatus and method for a liquid crystal display 17 2001
 
Semiconductor Energy Loboratory Co., Ltd. (1)
* 2010/0328,128 D/A Conversion Circuit and Semiconductor Device 0 2010
 
FRANCE BREVETS (2)
* 7,864,148 Bistable nematic liquid crystal display device and method for controlling such a device 2 2003
* 2006/0022,919 Bistable nematic liquid crystal display device and method for controlling such a device 3 2003
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (2)
* 7,298,368 Display device having a DAC per pixel 2 2004
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Syndiant, Inc. (8)
8,189,015 Allocating memory on a spatial light modulator 0 2006
8,089,431 Instructions controlling light modulating elements 0 2006
8,035,627 Bit serial control of light modulating elements 0 2006
8,004,505 Variable storage of bits on a backplane 2 2006
8,120,597 Mapping pixel values 1 2006
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8,558,856 Allocation registers on a spatial light modulator 0 2012
8,766,887 Allocating registers on a spatial light modulator 0 2013
 
BEIJING XIAOMI MOBILE SOFTWARE CO., LTD. (1)
* 6,731,306 Display panel 6 2001
 
SAMSUNG DISPLAY CO., LTD. (1)
* 7,095,391 Low power LCD 12 2001
 
GOLD CHARM LIMITED (5)
* 6,590,553 Liquid crystal display device and method for driving the same 29 2000
7,362,304 Liquid crystal display device and method for driving the same 15 2003
* 2004/0056,831 Liquid crystal display device and method for driving the same 8 2003
7,564,443 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 8 2008
 
FUJITSU LIMITED (2)
* 7,167,168 Display device and method for driving display device 3 2004
* 2004/0196,230 Display device and method for driving display device 1 2004
 
CITIZEN HOLDINGS CO., LTD. (1)
6,804,029 Liquid crystal shutter 2 2001
 
JAPAN DISPLAY WEST INC. (2)
* 7,825,885 Display device 8 2006
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MAXIM INTEGRATED PRODUCTS, INC. (1)
7,050,027 Single wire interface for LCD calibrator 8 2004
 
SANYO ELECTRIC CO., LTD. (30)
* 7,019,726 Power consumption of display apparatus during still image display mode 6 2000
* 2001/0005,193 Power consumption of display apparatus during still image display mode 14 2000
7,095,389 Active matrix display device 2 2001
7,081,875 Display device and its driving method 4 2001
7,019,727 Display device 1 2001
7,019,738 Display device and its control method 8 2001
6,853,371 Display device 40 2001
* 2002/0036,627 Display divice 3 2001
6,825,834 Active matrix display device 5 2001
6,671,023 Active matrix display device 2 2001
7,173,589 Display device 7 2002
7,123,233 Display device 2 2002
7,038,650 Display device 1 2002
7,027,026 Display device 3 2002
6,885,359 Display device with selective rewriting function 1 2002
6,873,321 Display device with two-level image representation 2 2002
* 2002/0163,591 Display device 4 2002
* 2002/0158,858 Display device 0 2002
6,950,080 Display device 4 2002
6,803,896 Display device 6 2002
* 2002/0171,607 Display device 4 2002
6,956,553 Active matrix display device 11 2002
* 2002/0167,477 Active matrix display device 7 2002
7,432,898 Active matrix display device 1 2005
* 2005/0280,621 Active matrix display device 3 2005
7,518,571 Display device 0 2005
7,583,259 Power consumption of display apparatus during still image display mode 1 2006
* 2006/0114,213 Power consumption of display apparatus during still image display mode 8 2006
7,808,495 Display device and its control method 8 2006
* 2006/0132,421 Display device and its control method 1 2006
 
DUKE UNIVERSITY (2)
7,460,101 Frame buffer pixel circuit for liquid crystal display 2 2005
* 2006/0001,634 Frame buffer pixel circuit for liquid crystal display 3 2005
 
NATIONAL SEMICONDUCTOR CORPORATION (1)
* 6,437,839 Liquid crystal on silicon (LCOS) display pixel with multiple storage capacitors 18 1999
 
WISTRON CORPORATION (3)
* 6,115,019 Register pixel for liquid crystal displays 22 1998
6,329,974 Electro-optical material-based display device having analog pixel drivers 50 1998
6,795,064 Electro-optical material-based grey scale generating method 47 2001
 
ELANTEC SEMICONDUCTOR, INC. (4)
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INTEL CORPORATION (5)
* 6,642,915 Display panel 6 1999
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VENTURE LENDING & LEASING IV, INC. (8)
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6,756,976 Monochrome and color digital display systems and methods for implementing the same 5 2002
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* 2005/0275,643 Asymmetrical switching delay compensation in display systems 2 2004
7,212,359 Color rendering of illumination light in display systems 4 2004
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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. (57)
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7,250,927 Portable information apparatus and method of driving the same 5 2001
7,224,339 Liquid crystal display device, method of driving the same, and method of driving a portable information device having the liquid crystal display device 42 2001
* 2002/0024,054 Electronic device and method of driving the same 4 2001
7,184,014 Liquid crystal display device 9 2001
* 2002/0041,266 Liquid crystal display device 6 2001
8,339,339 Light emitting device, method of driving the same, and electronic device 2 2001
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6,774,833 D/A conversion circuit and semiconductor device 8 2001
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* 2003/0103,025 Display device and display system using the same 4 2002
* 7,233,033 Semiconductor device having pixels 20 2004
7,227,542 Liquid crystal display device and method of driving the same 10 2004
7,268,777 Electrooptical device and method of fabricating the same 17 2004
* 2004/0257,357 Electrooptical device and method of fabricating the same 3 2004
7,411,535 D/A conversion circuit and semiconductor device 2 2004
* 7,532,208 Electrooptical device and method of fabricating the same 9 2004
* 2005/0093,852 Electrooptical device and method of fabricating the same 14 2004
7,489,291 Electrooptical device and method of fabricating the same 20 2004
* 2005/0088,433 Electrooptical device and method of fabricating the same 14 2004
7,518,592 Liquid crystal display device 3 2007
7,995,015 Display device 0 2007
* 2007/0146,265 Display device 4 2007
7,791,610 Display device and display system using the same 0 2007
8,760,376 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
8,018,412 Display device 0 2007
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* 2007/0182,678 Display device 2 2007
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7,750,833 D/A conversion circuit and semiconductor device 0 2008
* 2009/0066,678 D/A Conversion Circuit And Semiconductor Device 2 2008
8,044,905 TFT arrangement for display device 3 2008
* 2009/0140,253 TFT ARRANGEMENT FOR DISPLAY DEVICE 9 2008
8,564,575 Electrooptical device and method of fabricating the same 0 2009
8,089,385 D/A conversion circuit and semiconductor device 0 2010
8,854,286 Liquid crystal display device and electronic device including the liquid crystal display device 2 2010
* 2011/0090,204 LIQUID CRYSTAL DISPLAY DEVICE AND ELECTRONIC APPARATUS HAVING THE SAME 18 2010
9,070,595 Display device and electronic device including the same 0 2010
* 2011/0115,839 DISPLAY DEVICE AND ELECTRONIC DEVICE INCLUDING THE SAME 32 2010
8,866,984 Display device and manufacturing method thereof 0 2011
9,013,389 Display device 0 2011
* 2011/0216,048 DISPLAY DEVICE 4 2011
9,218,081 Semiconductor display device and driving method the same 0 2011
8,605,059 Input/output device and driving method thereof 2 2011
9,135,880 Control circuit of liquid crystal display device, liquid crystal display device, and electronic device including liquid crystal display device 0 2011
8,362,994 Display device 0 2011
8,687,161 TFT arrangement for display device 0 2011
8,754,796 D/A conversion circuit and semiconductor device 0 2011
8,680,917 Analog circuit and display device and electronic device 0 2013
9,147,368 TFT arrangement for display device 0 2014
8,836,420 Analog circuit and display device and electronic device 0 2014
9,368,082 Liquid crystal display device and electronic device including the liquid crystal display device 0 2014
9,117,732 Display device and manufacturing method thereof 0 2014
9,423,657 TFT arrangement for display device 0 2015
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
6,756,953 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)
8,669,928 Display device 0 2013
 
ATMEL GRENOBLE (1)
* 2007/0057,890 Liquid crystal microdisplay 2 2004
* Cited By Examiner