WO2002060173A3 - Method of gray scale generation for displays using a sample and hold circuit with discharge - Google Patents

Method of gray scale generation for displays using a sample and hold circuit with discharge Download PDF

Info

Publication number
WO2002060173A3
WO2002060173A3 PCT/US2001/044598 US0144598W WO02060173A3 WO 2002060173 A3 WO2002060173 A3 WO 2002060173A3 US 0144598 W US0144598 W US 0144598W WO 02060173 A3 WO02060173 A3 WO 02060173A3
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
sample
video signal
displays
discharge
Prior art date
Application number
PCT/US2001/044598
Other languages
French (fr)
Other versions
WO2002060173A2 (en
Inventor
Jessica L Stevens
Original Assignee
Telegen Corp
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 claimed from US09/726,074 external-priority patent/US20020063672A1/en
Priority claimed from US09/725,622 external-priority patent/US20020063728A1/en
Application filed by Telegen Corp filed Critical Telegen Corp
Priority to AU2002246538A priority Critical patent/AU2002246538A1/en
Publication of WO2002060173A2 publication Critical patent/WO2002060173A2/en
Publication of WO2002060173A3 publication Critical patent/WO2002060173A3/en

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0275—Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current

Abstract

A circuit and method for generating pulse width modulated signal (Fig.2A) from an anolog video signal. The circuit includes a first circuit portion that includes a first switch (20), a voltage storage device (40) that stores a portion of the analog video signal as a voltage value according to the first switch activated according to sample time information within a portion of time of the analog video signal, and a second switch (46) that outputs the stored voltage value when activated according to a next portion of time of the analog video signal. The circuit also includes a second circuit portion (64) that converts the outputted voltage value into a pulse width modulated signal.
PCT/US2001/044598 2000-11-29 2001-11-29 Method of gray scale generation for displays using a sample and hold circuit with discharge WO2002060173A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002246538A AU2002246538A1 (en) 2000-11-29 2001-11-29 Method of gray scale generation for displays using a sample and hold circuit with discharge

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/725,622 2000-11-29
US09/726,074 2000-11-29
US09/726,074 US20020063672A1 (en) 2000-11-29 2000-11-29 Method of gray scale generation for displays using a sample and hold circuit with discharge
US09/725,622 US20020063728A1 (en) 2000-11-29 2000-11-29 Method of gray scale generation for displays using a sample and hold circuit with a variable reference voltage

Publications (2)

Publication Number Publication Date
WO2002060173A2 WO2002060173A2 (en) 2002-08-01
WO2002060173A3 true WO2002060173A3 (en) 2003-02-13

Family

ID=27111191

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/044598 WO2002060173A2 (en) 2000-11-29 2001-11-29 Method of gray scale generation for displays using a sample and hold circuit with discharge

Country Status (2)

Country Link
AU (1) AU2002246538A1 (en)
WO (1) WO2002060173A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5587721A (en) * 1993-12-28 1996-12-24 International Business Machines Corporation Liquid crystal driving apparatus
US6151006A (en) * 1994-07-27 2000-11-21 Sharp Kabushiki Kaisha Active matrix type display device and a method for driving the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5587721A (en) * 1993-12-28 1996-12-24 International Business Machines Corporation Liquid crystal driving apparatus
US6151006A (en) * 1994-07-27 2000-11-21 Sharp Kabushiki Kaisha Active matrix type display device and a method for driving the same

Also Published As

Publication number Publication date
WO2002060173A2 (en) 2002-08-01
AU2002246538A1 (en) 2002-08-06

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