CA2164982A1 - Dispositif et methode d'affichage a adressage actif en temps reel utilisant un circuit de transformation de walsh rapide - Google Patents

Dispositif et methode d'affichage a adressage actif en temps reel utilisant un circuit de transformation de walsh rapide

Info

Publication number
CA2164982A1
CA2164982A1 CA 2164982 CA2164982A CA2164982A1 CA 2164982 A1 CA2164982 A1 CA 2164982A1 CA 2164982 CA2164982 CA 2164982 CA 2164982 A CA2164982 A CA 2164982A CA 2164982 A1 CA2164982 A1 CA 2164982A1
Authority
CA
Canada
Prior art keywords
data
unit
fwt
matrix
operably coupled
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.)
Abandoned
Application number
CA 2164982
Other languages
English (en)
Inventor
Arlie R. Conner
Benjamin Robert Clifton
John K. Grosspietsch
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.)
Motorola Solutions Inc
In Focus Systems Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2164982A1 publication Critical patent/CA2164982A1/fr
Abandoned 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
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3625—Control of matrices with row and column drivers using a passive matrix using active addressing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/12—Scanning 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
    • H04N3/127—Scanning 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information
    • H04N5/70—Circuit details for electroluminescent devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/907—Television signal recording using static stores, e.g. storage tubes or semiconductor memories

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (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

L'invention concerne un dispositif et un procédé générant des signaux de commande d'adressage actif destinés à un affichage à cristaux liquides grâce à une mise en oeuvre efficace des fonctions de Walsh. Par la mise en oeuvre d'une technique visant à déterminer les transformations rapides de Walsh, on obtient l'adressage actif en temps réel de signaux de commande en déterminant des adresses de mémoire à accès sélectif (RAM) pour envoyer des parties présélectionnées de données d'images numériques (PPDIDs) à une pluralité de mémoires RAM (106, 108, 110), et en commandant simultanément l'entrée/sortie parallèle de données vers/à partir des mémoires RAM et un circuit de la transformée rapide de WALSH (FWTC 102) de sorte que les transformées rapides de Walsh (FWTs) soient effectuées sur des données d'images numériques d'entrée. Par exemple, des signaux de commande à adressage actif pour une moitié de l'affichage à cristaux liquides en colonne de dimension 240 par 640 peuvent être déterminés en temps réel. Par conséquent, deux des dispositifs de la présente invention peuvent être utilisés pour produire un système d'adressage actif en temps réel s'appliquant à un affichage à cristaux liquides caractéristique à réseau graphique visuel (VGA).
CA 2164982 1993-06-30 1994-06-13 Dispositif et methode d'affichage a adressage actif en temps reel utilisant un circuit de transformation de walsh rapide Abandoned CA2164982A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8522893A 1993-06-30 1993-06-30
US08/085,228 1993-06-30

Publications (1)

Publication Number Publication Date
CA2164982A1 true CA2164982A1 (fr) 1995-01-12

Family

ID=22190282

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2164982 Abandoned CA2164982A1 (fr) 1993-06-30 1994-06-13 Dispositif et methode d'affichage a adressage actif en temps reel utilisant un circuit de transformation de walsh rapide

Country Status (4)

Country Link
JP (1) JPH09504617A (fr)
AU (1) AU676928B2 (fr)
CA (1) CA2164982A1 (fr)
WO (1) WO1995001628A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5959603A (en) * 1992-05-08 1999-09-28 Seiko Epson Corporation Liquid crystal element drive method, drive circuit, and display apparatus
US5900856A (en) 1992-03-05 1999-05-04 Seiko Epson Corporation Matrix display apparatus, matrix display control apparatus, and matrix display drive apparatus
EP0585466B1 (fr) 1992-03-05 1999-09-08 Seiko Epson Corporation Procede et circuit pour exciter des elements a cristaux liquides et dispositif d'affichage
US5877738A (en) * 1992-03-05 1999-03-02 Seiko Epson Corporation Liquid crystal element drive method, drive circuit, and display apparatus
US5739803A (en) * 1994-01-24 1998-04-14 Arithmos, Inc. Electronic system for driving liquid crystal displays
CN100505008C (zh) 1994-11-17 2009-06-24 精工爱普生株式会社 显示装置和含显示装置的电子设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001794B (en) * 1977-07-26 1982-01-27 Secr Defence Method of and apparatus for displaying waveforms
US5485173A (en) * 1991-04-01 1996-01-16 In Focus Systems, Inc. LCD addressing system and method

Also Published As

Publication number Publication date
WO1995001628A1 (fr) 1995-01-12
JPH09504617A (ja) 1997-05-06
AU676928B2 (en) 1997-03-27
AU7172294A (en) 1995-01-24

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Dead