WO2007034360A3 - Active matrix display devices and methods of driving the same - Google Patents

Active matrix display devices and methods of driving the same Download PDF

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Publication number
WO2007034360A3
WO2007034360A3 PCT/IB2006/053228 IB2006053228W WO2007034360A3 WO 2007034360 A3 WO2007034360 A3 WO 2007034360A3 IB 2006053228 W IB2006053228 W IB 2006053228W WO 2007034360 A3 WO2007034360 A3 WO 2007034360A3
Authority
WO
WIPO (PCT)
Prior art keywords
current source
active matrix
matrix display
output
pixels
Prior art date
Application number
PCT/IB2006/053228
Other languages
French (fr)
Other versions
WO2007034360A2 (en
Inventor
Den Homberg Johannes A T M Van
Hendrik J Bergveld
Franciscus A C M Schoofs
Eise C Dijkmans
Original Assignee
Koninkl Philips Electronics Nv
Den Homberg Johannes A T M Van
Hendrik J Bergveld
Franciscus A C M Schoofs
Eise C Dijkmans
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
Application filed by Koninkl Philips Electronics Nv, Den Homberg Johannes A T M Van, Hendrik J Bergveld, Franciscus A C M Schoofs, Eise C Dijkmans filed Critical Koninkl Philips Electronics Nv
Publication of WO2007034360A2 publication Critical patent/WO2007034360A2/en
Publication of WO2007034360A3 publication Critical patent/WO2007034360A3/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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • 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
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0248—Precharge or discharge of column electrodes before or after applying exact column voltages
    • 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
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/066—Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
    • 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

Abstract

An active matrix display device comprises an array of pixels arranged in rows and columns and a column driver circuit for providing pixel drive signals to the columns of pixels. The column driver circuit comprises an array of current source circuits, a respective current source circuit being provided for each column of pixels, and each current source circuit comprises a current source (70; 80; 90), an output driver (71), a storage capacitor (72) connected to the output of the output driver; and a supply switch (78) for controlling the time during which the current source supplies current to or drains current from the storage capacitor (72), thereby determining the output voltage of the output driver. The device further comprises a mapping means (86) for deriving from a pixel drive level a digital value which represents a time period for the control of the supply switch (78) of each current source circuit.
PCT/IB2006/053228 2005-09-19 2006-09-12 Active matrix display devices and methods of driving the same WO2007034360A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05108610 2005-09-19
EP05108610.6 2005-09-19

Publications (2)

Publication Number Publication Date
WO2007034360A2 WO2007034360A2 (en) 2007-03-29
WO2007034360A3 true WO2007034360A3 (en) 2007-07-05

Family

ID=37680565

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/053228 WO2007034360A2 (en) 2005-09-19 2006-09-12 Active matrix display devices and methods of driving the same

Country Status (1)

Country Link
WO (1) WO2007034360A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6331844B1 (en) * 1996-06-11 2001-12-18 Kabushiki Kaisha Toshiba Liquid crystal display apparatus
US20020145584A1 (en) * 2001-04-06 2002-10-10 Waterman John Karl Liquid crystal display column capacitance charging with a current source
WO2005024773A1 (en) * 2003-09-10 2005-03-17 Koninklijke Philips Electronics N. V. Driver circuit for a liquid crystal display
WO2006092757A2 (en) * 2005-03-02 2006-09-08 Koninklijke Philips Electronics N.V. Active matrix display devices and methods of driving the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6331844B1 (en) * 1996-06-11 2001-12-18 Kabushiki Kaisha Toshiba Liquid crystal display apparatus
US20020145584A1 (en) * 2001-04-06 2002-10-10 Waterman John Karl Liquid crystal display column capacitance charging with a current source
WO2005024773A1 (en) * 2003-09-10 2005-03-17 Koninklijke Philips Electronics N. V. Driver circuit for a liquid crystal display
WO2006092757A2 (en) * 2005-03-02 2006-09-08 Koninklijke Philips Electronics N.V. Active matrix display devices and methods of driving the same

Also Published As

Publication number Publication date
WO2007034360A2 (en) 2007-03-29

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