IT1262399B - Metodo di comando di un pannello matriciale a cristallo liquido ferroelettrico. - Google Patents

Metodo di comando di un pannello matriciale a cristallo liquido ferroelettrico.

Info

Publication number
IT1262399B
IT1262399B ITRM930567A ITRM930567A IT1262399B IT 1262399 B IT1262399 B IT 1262399B IT RM930567 A ITRM930567 A IT RM930567A IT RM930567 A ITRM930567 A IT RM930567A IT 1262399 B IT1262399 B IT 1262399B
Authority
IT
Italy
Prior art keywords
amin
impulse
pulse
liquid crystal
ferroelectric liquid
Prior art date
Application number
ITRM930567A
Other languages
English (en)
Inventor
Paolo Maltese
Original Assignee
Univ Roma
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 Univ Roma filed Critical Univ Roma
Priority to ITRM930567A priority Critical patent/IT1262399B/it
Publication of ITRM930567A0 publication Critical patent/ITRM930567A0/it
Priority to PCT/IT1994/000138 priority patent/WO1995006308A1/en
Priority to EP94924990A priority patent/EP0714543A1/en
Priority to US08/596,187 priority patent/US5841419A/en
Priority to AU75080/94A priority patent/AU7508094A/en
Publication of ITRM930567A1 publication Critical patent/ITRM930567A1/it
Application granted granted Critical
Publication of IT1262399B publication Critical patent/IT1262399B/it

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
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
    • 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
    • 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
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking

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)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

Oggetto dell'invenzione è un metodo di comando di un pannello matriciale a cristallo liquido ferroelettrico il quale sostanzialmente consiste nell'uso di tensioni di selezione comprendenti almeno quattro impulsi, ossia tensioni sostanzialmente sempre della stessa polarità in intervalli di tempo finiti, a ogni rinfresco del pannello, di cui gli ultimi due consecutivi e con opposte polarità, aventi valori assoluti dell'integrale della tensione nel tempo, durante ciascun impulso, compresi nei limiti ben definiti e nell'uso di finestre temporali di comando come ben specificate. Per l'ultimo impulso. detto valore assoluto dell'integrale della tensione nel tempo è compreso tra 0,2Amin e Amin; per il penultimo impulso, è compreso tra 0,2 Amin e 3 Amin: per un impulso (di compensazione) precedente i due anzidetti, è compreso tra 0,8 Amin e 3 Amin e, per un impulso (di cancellazione) precedente i tre anzidetti, è compreso tra 1 e 10 volte il valore dell'impulso di compensazione. Inoltre la corrispondente finestra temporale di comando associata si sovrappone in parte nel penultimo impulso, per almeno due e non più di quattro quinti della durata complessiva di detta finestra.
ITRM930567A 1993-08-20 1993-08-20 Metodo di comando di un pannello matriciale a cristallo liquido ferroelettrico. IT1262399B (it)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ITRM930567A IT1262399B (it) 1993-08-20 1993-08-20 Metodo di comando di un pannello matriciale a cristallo liquido ferroelettrico.
PCT/IT1994/000138 WO1995006308A1 (en) 1993-08-20 1994-08-18 A control method for a ferroelectric liquid crystal matrix display
EP94924990A EP0714543A1 (en) 1993-08-20 1994-08-18 A control method for a ferroelectric liquid crystal matrix display
US08/596,187 US5841419A (en) 1993-08-20 1994-08-18 Control method for ferroelectric liquid crystal matrix display
AU75080/94A AU7508094A (en) 1993-08-20 1994-08-18 A control method for a ferroelectric liquid crystal matrix display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITRM930567A IT1262399B (it) 1993-08-20 1993-08-20 Metodo di comando di un pannello matriciale a cristallo liquido ferroelettrico.

Publications (3)

Publication Number Publication Date
ITRM930567A0 ITRM930567A0 (it) 1993-08-20
ITRM930567A1 ITRM930567A1 (it) 1995-02-20
IT1262399B true IT1262399B (it) 1996-06-19

Family

ID=11401923

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM930567A IT1262399B (it) 1993-08-20 1993-08-20 Metodo di comando di un pannello matriciale a cristallo liquido ferroelettrico.

Country Status (5)

Country Link
US (1) US5841419A (it)
EP (1) EP0714543A1 (it)
AU (1) AU7508094A (it)
IT (1) IT1262399B (it)
WO (1) WO1995006308A1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1286331B1 (it) 1996-09-27 1998-07-08 Univ Roma Metodo di comando con tensioni ridotte di un pannello matriciale a cristallo liquido ferrroelettrico
KR100623990B1 (ko) * 2000-07-27 2006-09-13 삼성전자주식회사 액정 표시 장치 및 이의 구동 방법
US10276085B2 (en) * 2015-07-16 2019-04-30 Apple Inc. Pixel signal compensation for a display panel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03132692A (ja) * 1989-10-18 1991-06-06 Matsushita Electric Ind Co Ltd 液晶表示装置の駆動方法及びその駆動回路
JP3183537B2 (ja) * 1990-09-06 2001-07-09 セイコーエプソン株式会社 液晶電気光学素子の駆動方法
US5379050A (en) * 1990-12-05 1995-01-03 U.S. Philips Corporation Method of driving a matrix display device and a matrix display device operable by such a method
JPH05158444A (ja) * 1991-12-04 1993-06-25 Canon Inc 液晶表示装置
ATE171807T1 (de) * 1992-04-01 1998-10-15 Canon Kk Anzeigegerät
EP0605865B1 (en) * 1992-12-28 1998-03-25 Canon Kabushiki Kaisha Method and apparatus for liquid crystal display

Also Published As

Publication number Publication date
EP0714543A1 (en) 1996-06-05
ITRM930567A0 (it) 1993-08-20
ITRM930567A1 (it) 1995-02-20
AU7508094A (en) 1995-03-21
US5841419A (en) 1998-11-24
WO1995006308A1 (en) 1995-03-02

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19960717