WO2004010409A1 - Appareil d'affichage - Google Patents

Appareil d'affichage Download PDF

Info

Publication number
WO2004010409A1
WO2004010409A1 PCT/IB2003/002897 IB0302897W WO2004010409A1 WO 2004010409 A1 WO2004010409 A1 WO 2004010409A1 IB 0302897 W IB0302897 W IB 0302897W WO 2004010409 A1 WO2004010409 A1 WO 2004010409A1
Authority
WO
WIPO (PCT)
Prior art keywords
display
emissions
video signals
display apparatus
primary video
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.)
Ceased
Application number
PCT/IB2003/002897
Other languages
English (en)
Inventor
Derk A. Kort
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to AU2003242946A priority Critical patent/AU2003242946A1/en
Publication of WO2004010409A1 publication Critical patent/WO2004010409A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G09G3/2948—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge by increasing the total sustaining time with respect to other times in the frame
    • 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
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the required power is substantially lower than the maximum required power when all pixels are emitting light. It is economically not justified to provide a power supply which is able to supply this maximum power requested by the plasma module.
  • the power consumption of the plasma module is limited to a maximum power which the power supply of the display apparatus is able to deliver.
  • the power consumption of the plasma module is limited by decreasing the number of sustain pulses (the emissions) during the sustain phase as a function of an increasing display load.
  • the controlling circuit lowers the number of emissions as function of the display load to obtain a substantially linear increase of power consumed by the display apparatus as a function of the increase of the display load.
  • the voltage across all the plasma cells PCij has to change polarity.
  • All the plasma cells PCij arranged in parallel form the large panel capacitance CP.
  • the polarity reversal has to take place within the quite short formative time lag FTL (the time between applying a sustain pulse slope and the ignition of the plasma) of the plasma cells PCij .
  • FTL the time between applying a sustain pulse slope and the ignition of the plasma
  • the panel capacitance is 15 nF
  • the sustain voltage has to change from -170N to +170V in about 0,5 microseconds causing a current of about 45 Amperes.
  • the sustain period T2 of each of the subfields SFl to SF4 represents the length of time during which the selected cells emit light. It is possible to reproduce 16 gray levels by selecting the appropriate subfields in which a pixel PCij should produce light. Usually 8 to 10 subfields instead of 4 are present.
  • the power consumption P varies with the share of the primary colors R, G, B in images in which more than one primary color is present.
  • the maximum power consumption has to be limited to the maximum power which can be handled by the power supply.
  • the power limiting circuit has to be designed to limit the maximum power in the worse case situation of shares of the primary colors to the maximum power which can be handled by the power supply. In all other situations, the limiting circuit will limit the power too much.
  • the graph PI shows the power consumption P as a function of the image load IL if the power limiting circuit controls the number of sustain pulses NSP as a function of the image load IL as indicated by the graph NSl .
  • This relation between the image load IL and the number of sustain pulses is known.
  • the graph P3 shows the power consumption P as a function of the image load IL if the power limiting circuit controls the number of sustain pulses NSP as a function of the image load IL as indicated by the graph NS3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un appareil d'affichage affichant une image couleur en contrôlant une pluralité d'émissions (NSP) conformément à des signaux vidéo primaires (R, G, B). Un circuit de calcul (CC, CS) calcule une somme pondérée (IL) des signaux vidéo primaires (R, G, B) et limite le nombre d'émissions (NSP) dépendant de la somme pondérée. Dans la somme pondérée (IL), au moins l'un des signaux vidéo primaires (R, G, B) est pondéré différemment de l'un des autres signaux vidéo primaires (R, G, B). Ceci permet de sélectionner la contribution des différentes couleurs primaires (R, G, B) sur la somme pondérée (IL), de telle façon que le nombre d'émissions (NSP) soit contrôlé différemment pour différentes couleurs primaires (R, G, B). En conséquence, la puissance (P) peut être limitée pour chacune des couleurs primaires (R, G, B) à sensiblement la même valeur.
PCT/IB2003/002897 2002-07-18 2003-06-26 Appareil d'affichage Ceased WO2004010409A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003242946A AU2003242946A1 (en) 2002-07-18 2003-06-26 Display apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02077944 2002-07-18
EP02077944.3 2002-07-18

Publications (1)

Publication Number Publication Date
WO2004010409A1 true WO2004010409A1 (fr) 2004-01-29

Family

ID=30470292

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/002897 Ceased WO2004010409A1 (fr) 2002-07-18 2003-06-26 Appareil d'affichage

Country Status (3)

Country Link
AU (1) AU2003242946A1 (fr)
TW (1) TW200402019A (fr)
WO (1) WO2004010409A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09281927A (ja) * 1996-04-19 1997-10-31 Fujitsu General Ltd プラズマディスプレイ装置
WO2000017845A1 (fr) * 1998-09-18 2000-03-30 Matsushita Electric Industrial Co., Ltd. Appareil de presentation en couleur
EP1345201A2 (fr) * 2002-03-04 2003-09-17 Lg Electronics Inc. Détection de l'éclairement moyen d'une image d'un afficheur à plasma

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09281927A (ja) * 1996-04-19 1997-10-31 Fujitsu General Ltd プラズマディスプレイ装置
WO2000017845A1 (fr) * 1998-09-18 2000-03-30 Matsushita Electric Industrial Co., Ltd. Appareil de presentation en couleur
EP1345201A2 (fr) * 2002-03-04 2003-09-17 Lg Electronics Inc. Détection de l'éclairement moyen d'une image d'un afficheur à plasma

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30) *

Also Published As

Publication number Publication date
AU2003242946A1 (en) 2004-02-09
TW200402019A (en) 2004-02-01

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