EP0364590A4 - Method of erasing liquid crystal display and an erasing circuit - Google Patents

Method of erasing liquid crystal display and an erasing circuit

Info

Publication number
EP0364590A4
EP0364590A4 EP19890900891 EP89900891A EP0364590A4 EP 0364590 A4 EP0364590 A4 EP 0364590A4 EP 19890900891 EP19890900891 EP 19890900891 EP 89900891 A EP89900891 A EP 89900891A EP 0364590 A4 EP0364590 A4 EP 0364590A4
Authority
EP
European Patent Office
Prior art keywords
drive circuit
bus drive
power source
circuit
gate bus
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP19890900891
Other languages
French (fr)
Other versions
EP0364590A1 (en
EP0364590B1 (en
Inventor
Masaru Yasui
Noriyoshi Uenishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hosiden Corp
Original Assignee
Hosiden Electronics Co Ltd
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 JP33176487A external-priority patent/JPH01170989A/en
Priority claimed from JP62331765A external-priority patent/JP2655328B2/en
Application filed by Hosiden Electronics Co Ltd filed Critical Hosiden Electronics Co Ltd
Publication of EP0364590A1 publication Critical patent/EP0364590A1/en
Publication of EP0364590A4 publication Critical patent/EP0364590A4/en
Application granted granted Critical
Publication of EP0364590B1 publication Critical patent/EP0364590B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan 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
    • 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
    • G09G2310/0245—Clearing or presetting the whole screen independently of waveforms, e.g. on power-on
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

When the display is to be erased from active matrix-type liquid crystal display elements which have a source bus drive circuit (16) and a gate bus drive circuit (17), pixel signals for turning the pixels off are supplied in an amount of one line to the source bus drive circuit and, at the same time, a clear signal (CL) is given to a gate bus drive circuit (17) to apply a voltage simultaneously to all gate buses (151 to 15m) to turn on the transistors (13) in all of the pixels. Provision is made of a power source holding circuit (22) for holding the power of the power source (V1) supplied to the gate bus drive circuit (17) for a predetermined period of time even after the power source is turned off, and a voltage drop detect circuit (24) for detecting the turn-off of the power source. A clear signal (CL) is produced in response to the detect signal and is sent to the gate bus drive circuit (17). In response to the clear signal, the gate bus drive circuit supplies a voltage for turning on the transistors (13) of all pixels simultaneously to all of the gate buses to erase the display in a short period of time after the power source is turned off.
EP89900891A 1987-12-25 1988-12-23 Method of erasing liquid crystal display and an erasing circuit Expired - Lifetime EP0364590B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP33176487A JPH01170989A (en) 1987-12-25 1987-12-25 Liquid crystal display erasing method
JP331765/87 1987-12-25
JP331764/87 1987-12-25
JP62331765A JP2655328B2 (en) 1987-12-25 1987-12-25 How to clear the LCD display when the power is turned off
PCT/JP1988/001308 WO1989006416A1 (en) 1987-12-25 1988-12-23 Method of erasing liquid crystal display and an erasing circuit

Publications (3)

Publication Number Publication Date
EP0364590A1 EP0364590A1 (en) 1990-04-25
EP0364590A4 true EP0364590A4 (en) 1992-06-03
EP0364590B1 EP0364590B1 (en) 1995-06-14

Family

ID=26573956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89900891A Expired - Lifetime EP0364590B1 (en) 1987-12-25 1988-12-23 Method of erasing liquid crystal display and an erasing circuit

Country Status (3)

Country Link
EP (1) EP0364590B1 (en)
DE (1) DE3853998T2 (en)
WO (1) WO1989006416A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100206567B1 (en) * 1995-09-07 1999-07-01 윤종용 Screen erase circuit and its driving method of tft
US5945970A (en) * 1996-09-06 1999-08-31 Samsung Electronics Co., Ltd. Liquid crystal display devices having improved screen clearing capability and methods of operating same
JPH10333642A (en) * 1997-05-27 1998-12-18 Internatl Business Mach Corp <Ibm> Liquid crystal display device
KR100262403B1 (en) * 1997-06-25 2000-08-01 김영환 Scan line of lcd and its driver circuit
KR100559216B1 (en) * 1998-09-03 2006-06-13 비오이 하이디스 테크놀로지 주식회사 Afterimage elimination circuit of liquid crystal display device
KR100430095B1 (en) * 1998-09-15 2004-07-27 엘지.필립스 엘시디 주식회사 Apparatus For Eliminating Afterimage in Liquid Crystal Display and Method Thereof
JP3686961B2 (en) * 2000-08-04 2005-08-24 シャープ株式会社 Liquid crystal display device and electronic apparatus using the same
GB0130017D0 (en) * 2001-12-15 2002-02-06 Koninkl Philips Electronics Nv Active matrix liquid crystal display devices
KR100852170B1 (en) * 2002-03-18 2008-08-13 삼성전자주식회사 Circuit for driving liquid crystal display panel and method for driving thereof
CN100367327C (en) * 2003-09-28 2008-02-06 统宝光电股份有限公司 Residual image eliminating circuit
KR100734275B1 (en) * 2005-10-04 2007-07-02 삼성전자주식회사 Detection Circuit for detecting whether source voltage is removed, method and display device for removing afterimage when source voltage is removed
CN101868833B (en) * 2007-12-27 2013-03-13 夏普株式会社 Shift register and display device
DE102012024520B4 (en) * 2012-09-28 2017-06-22 Lg Display Co., Ltd. An organic light-emitting display and method for removing image fouling therefrom
US11210986B1 (en) * 2020-08-03 2021-12-28 Novatek Microelectronics Corp. Display driving apparatus and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035382A1 (en) * 1980-02-29 1981-09-09 Fujitsu Limited Modular display device and display module therefor
US4380008A (en) * 1978-09-29 1983-04-12 Hitachi, Ltd. Method of driving a matrix type phase transition liquid crystal display device to obtain a holding effect and improved response time for the erasing operation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS534853U (en) * 1976-06-29 1978-01-17
JPS5691297A (en) * 1979-12-25 1981-07-24 Citizen Watch Co Ltd Liquiddcrystal displayypanel drive method
JPS585792A (en) * 1981-07-03 1983-01-13 株式会社日立製作所 Matrix type liquid crystal dispaly
JPS61162029A (en) * 1985-01-11 1986-07-22 Sharp Corp Liquid crystal driving circuit
JPH07109455B2 (en) * 1986-01-17 1995-11-22 セイコーエプソン株式会社 Driving method for electro-optical device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380008A (en) * 1978-09-29 1983-04-12 Hitachi, Ltd. Method of driving a matrix type phase transition liquid crystal display device to obtain a holding effect and improved response time for the erasing operation
EP0035382A1 (en) * 1980-02-29 1981-09-09 Fujitsu Limited Modular display device and display module therefor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 006 (P-653)9 January 1988 & JP-A-62 165 630 ( SEIKO EPSON CORP. ) 22 July 1987 *
See also references of WO8906416A1 *

Also Published As

Publication number Publication date
DE3853998D1 (en) 1995-07-20
EP0364590A1 (en) 1990-04-25
WO1989006416A1 (en) 1989-07-13
DE3853998T2 (en) 1995-11-23
EP0364590B1 (en) 1995-06-14

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