IT1219550B - Electro-optic modulator, in particular liquid crystal device based on 'effect of the birefringence in supertorsione - Google Patents

Electro-optic modulator, in particular liquid crystal device based on 'effect of the birefringence in supertorsione

Info

Publication number
IT1219550B
IT1219550B IT4788288A IT4788288A IT1219550B IT 1219550 B IT1219550 B IT 1219550B IT 4788288 A IT4788288 A IT 4788288A IT 4788288 A IT4788288 A IT 4788288A IT 1219550 B IT1219550 B IT 1219550B
Authority
IT
Italy
Prior art keywords
supertorsione
birefringence
electro
effect
liquid crystal
Prior art date
Application number
IT4788288A
Other languages
Italian (it)
Other versions
IT8847882D0 (en
Inventor
Yokoyama Kozo
Original Assignee
Seiko Instr Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP10047287A priority Critical patent/JPS63265225A/en
Priority to JP10047487A priority patent/JPS63265227A/en
Priority to JP10047387A priority patent/JPS63265226A/en
Application filed by Seiko Instr Inc filed Critical Seiko Instr Inc
Publication of IT8847882D0 publication Critical patent/IT8847882D0/en
Application granted granted Critical
Publication of IT1219550B publication Critical patent/IT1219550B/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/12Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays
    • H04N3/127Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays using liquid crystals
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3685Details of drivers for data electrodes
    • G09G3/3692Details of drivers for data electrodes suitable for passive matrices only
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3696Generation of voltages supplied to electrode drivers
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2014Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
IT4788288A 1987-04-23 1988-04-21 Electro-optic modulator, in particular liquid crystal device based on 'effect of the birefringence in supertorsione IT1219550B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10047287A JPS63265225A (en) 1987-04-23 1987-04-23 Optical modulator
JP10047487A JPS63265227A (en) 1987-04-23 1987-04-23 Optical modulator
JP10047387A JPS63265226A (en) 1987-04-23 1987-04-23 Optical modulator

Publications (2)

Publication Number Publication Date
IT8847882D0 IT8847882D0 (en) 1988-04-21
IT1219550B true IT1219550B (en) 1990-05-18

Family

ID=27309229

Family Applications (1)

Application Number Title Priority Date Filing Date
IT4788288A IT1219550B (en) 1987-04-23 1988-04-21 Electro-optic modulator, in particular liquid crystal device based on 'effect of the birefringence in supertorsione

Country Status (3)

Country Link
FR (1) FR2614437B1 (en)
GB (1) GB2204174B (en)
IT (1) IT1219550B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644001B1 (en) * 1989-03-03 1992-12-18 Centaure Sa image display system
US5185602A (en) * 1989-04-10 1993-02-09 Cirrus Logic, Inc. Method and apparatus for producing perception of high quality grayscale shading on digitally commanded displays
DE3930259A1 (en) * 1989-09-11 1991-03-21 Thomson Brandt Gmbh Drive circuit for a liquid-crystal display
JP2642204B2 (en) * 1989-12-14 1997-08-20 シャープ株式会社 Driving circuit of the liquid crystal display device
FR2656757B1 (en) * 1989-12-28 1992-03-20 Thomson Consumer Electronics Method for addressing each column of an LCD screen of the matrix type.
US5485173A (en) * 1991-04-01 1996-01-16 In Focus Systems, Inc. LCD addressing system and method
WO1993013513A1 (en) * 1991-12-24 1993-07-08 Cirrus Logic, Inc. Process for producing shaded images on display screens
US5751265A (en) * 1991-12-24 1998-05-12 Cirrus Logic, Inc. Apparatus and method for producing shaded images on display screens
JPH0876711A (en) * 1994-09-02 1996-03-22 Mitsubishi Electric Corp Display device
EP0838800A1 (en) * 1996-10-24 1998-04-29 Motorola, Inc. Nonlinear gray scale method and apparatus
US6034663A (en) * 1997-03-10 2000-03-07 Chips & Technologies, Llc Method for providing grey scale images to the visible limit on liquid crystal displays
US6211859B1 (en) 1997-03-10 2001-04-03 Chips & Technologies, Llc Method for reducing pulsing on liquid crystal displays
WO1999021159A1 (en) * 1997-10-17 1999-04-29 Motorola Inc. Method for controlling brightness in a flat panel display
JP3073486B2 (en) 1998-02-16 2000-08-07 キヤノン株式会社 The driving method of the image forming apparatus and an electron beam device and the modulation circuit and an image forming apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56117287A (en) * 1980-02-21 1981-09-14 Sharp Kk Indicator driving system
JPS5927687A (en) * 1982-08-04 1984-02-14 Casio Comput Co Ltd Pocketable television receiver
IN161652B (en) * 1983-07-12 1988-01-09 Bbc Brown Boveri & Cie Multiplexible liquid crystal display
CA1239468A (en) * 1984-01-13 1988-07-19 Yuji Watanabe Video display system

Also Published As

Publication number Publication date
IT8847882D0 (en) 1988-04-21
GB8809416D0 (en) 1988-05-25
GB2204174A (en) 1988-11-02
FR2614437A1 (en) 1988-10-28
GB2204174B (en) 1991-03-13
FR2614437B1 (en) 1993-10-15

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of prs-date), data collected since 19931001

Effective date: 19970429