EP0992972A3 - Method of adjusting the light intensity of a cell of a flat panel display - Google Patents

Method of adjusting the light intensity of a cell of a flat panel display Download PDF

Info

Publication number
EP0992972A3
EP0992972A3 EP99119311A EP99119311A EP0992972A3 EP 0992972 A3 EP0992972 A3 EP 0992972A3 EP 99119311 A EP99119311 A EP 99119311A EP 99119311 A EP99119311 A EP 99119311A EP 0992972 A3 EP0992972 A3 EP 0992972A3
Authority
EP
European Patent Office
Prior art keywords
cell
adjusting
light intensity
flat panel
panel display
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.)
Withdrawn
Application number
EP99119311A
Other languages
German (de)
French (fr)
Other versions
EP0992972A2 (en
Inventor
Roland Dipl.-Ing. Bohl
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of EP0992972A2 publication Critical patent/EP0992972A2/en
Publication of EP0992972A3 publication Critical patent/EP0992972A3/en
Withdrawn legal-status Critical Current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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0238—Improving the black level
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0606—Manual adjustment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Television Receiver Circuits (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zur Einstellung der Helligkeit einer Zelle eines Flachdisplays, die durch zeitliche Ansteuerung veränderbar ist, dadurch gekennzeichnet, daß unter Berücksichtigung des subjektiven Helligkeitsempfindens die Helligkeitseinstellgröße nicht linear verändert wird, und zwar in der Weise, daß sie im dunkleren Bereich höher ist als im helleren Bereich und unterhalb eines definierten Maximalwertes liegt, und eine Schaltungsanordnung zur Durchführung des Verfahrens.

Figure 00000001
The invention relates to a method for adjusting the brightness of a cell of a flat display, which can be changed by time control, characterized in that, taking into account the subjective brightness perception, the brightness setting variable is not changed linearly, in such a way that it is higher in the darker area than in the lighter area and below a defined maximum value, and a circuit arrangement for performing the method.
Figure 00000001
EP99119311A 1998-10-01 1999-09-29 Method of adjusting the light intensity of a cell of a flat panel display Withdrawn EP0992972A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998145187 DE19845187A1 (en) 1998-10-01 1998-10-01 Method for adjusting the brightness of a cell on a flat display
DE19845187 1998-10-01

Publications (2)

Publication Number Publication Date
EP0992972A2 EP0992972A2 (en) 2000-04-12
EP0992972A3 true EP0992972A3 (en) 2000-10-25

Family

ID=7883030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99119311A Withdrawn EP0992972A3 (en) 1998-10-01 1999-09-29 Method of adjusting the light intensity of a cell of a flat panel display

Country Status (2)

Country Link
EP (1) EP0992972A3 (en)
DE (1) DE19845187A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6563479B2 (en) * 2000-12-22 2003-05-13 Visteon Global Technologies, Inc. Variable resolution control system and method for a display device
US7456829B2 (en) * 2004-12-03 2008-11-25 Hewlett-Packard Development Company, L.P. Methods and systems to control electronic display brightness

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05100652A (en) * 1991-10-04 1993-04-23 Kokusai Electric Co Ltd Brightness characteristic controller for display unit
EP0614321A2 (en) * 1993-03-02 1994-09-07 Fujitsu General Limited Color display unit with plasma display panel
US5754150A (en) * 1995-02-17 1998-05-19 Sharp Kabushiki Kaisha Liquid crystal luminance adjusting apparatus
US5757343A (en) * 1995-04-14 1998-05-26 Pioneer Electronic Corporation Apparatus allowing continuous adjustment of luminance of a plasma display panel

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1534777A (en) * 1967-06-01 1968-08-02 Thomson Houston Comp Francaise Improvements to gamma correction circuits
US4589022A (en) * 1983-11-28 1986-05-13 General Electric Company Brightness control system for CRT video display
JPH0437263A (en) * 1990-05-31 1992-02-07 Matsushita Electric Ind Co Ltd Gradation correction device
DE4217594A1 (en) * 1992-05-27 1993-12-02 Siemens Nixdorf Inf Syst Brightness and-or contrast control for VDU - has control matrix in front of screen control, with photosensitive sensor circuit for luminance value
US6362835B1 (en) * 1993-11-23 2002-03-26 Texas Instruments Incorporated Brightness and contrast control for a digital pulse-width modulated display system
DE19509035B4 (en) * 1994-03-23 2007-06-28 Carl Zeiss Optronics Gmbh Method for controlling the brightness of a screen display and device, in particular thermal imaging device, with it
DE19720876A1 (en) * 1997-05-17 1998-11-19 Grundig Ag Method and device for adjusting the contrast in pulse-width-controlled image displays
DE19721984C2 (en) * 1997-05-26 1999-10-07 Siemens Ag monitor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05100652A (en) * 1991-10-04 1993-04-23 Kokusai Electric Co Ltd Brightness characteristic controller for display unit
EP0614321A2 (en) * 1993-03-02 1994-09-07 Fujitsu General Limited Color display unit with plasma display panel
US5754150A (en) * 1995-02-17 1998-05-19 Sharp Kabushiki Kaisha Liquid crystal luminance adjusting apparatus
US5757343A (en) * 1995-04-14 1998-05-26 Pioneer Electronic Corporation Apparatus allowing continuous adjustment of luminance of a plasma display panel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 451 (P - 1595) 18 August 1993 (1993-08-18) *

Also Published As

Publication number Publication date
DE19845187A1 (en) 2000-04-13
EP0992972A2 (en) 2000-04-12

Similar Documents

Publication Publication Date Title
EP0786714A3 (en) Method and apparatus for adjusting the intensity of a current or voltage controlled lighting means for rear lighting of a display device especially for motor vehicles
EP0327628B2 (en) Orthodontic accessory with marking and process for manufacturing same
EP3061732A1 (en) Coated glass or glass-ceramic articles
DE3931668C2 (en) Lighting device for display boards
DE202011000857U1 (en) Display backlighting arrangement for increasing color saturation, brightness and white balance performance
EP0992972A3 (en) Method of adjusting the light intensity of a cell of a flat panel display
DE112014001132B4 (en) Color control method
EP2308560B1 (en) Light therapy device
DE10349553B4 (en) Method and light network for brightness control and dynamic color mixing of LED units
DE59206189D1 (en) METHOD AND DEVICE FOR BRIGHTNESS AND / OR COLOR TEMPERATURE CONTROL FOR A MICROSCOPIC LIGHTING SYSTEM
DE10337357A1 (en) Method and device for lighting control for a camera
EP1016623A3 (en) Process for the preparation of phosphinic acids
WO2006015711A1 (en) Method and device for controlling an electrical appliance comprising a plurality of electrical consumers
DE20121470U1 (en) lamp
EP3320758A1 (en) Demonstrator for simulating daylight
DE102017213987A1 (en) Method for operating a lighting device in a motor vehicle; and motor vehicle
EP0978692A3 (en) Monitoring and operating device for heating installations
EP2375870B1 (en) Light control method and system
DE10356721B4 (en) Illuminated image with a day-night effect
DE19548261A1 (en) Process for the manufacture of a bronze patina on semi-finished copper products
DE102004045428A1 (en) Sanitary mixing fitting with an electronic display device and method for operating such
DE10160667A1 (en) Drive method for electroluminescent element, by varying time intervals between application of control signals so that brightness remains constant over lifetime of element
DE3000400A1 (en) Fluorescent tube and high pressure vapour lamp operating system - initially connects lamps on starting to AC mains, with subsequent switching to light control mains
DE10032201B4 (en) Method for operating a freely writable, glare-free and energy-saving traffic light system in the traffic area and device system for its realization
DE10208826A1 (en) Illuminated display device for motor vehicle has light source whose brightness rises continuously to preset level of brightness after motor vehicle is switched on

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20001014

17Q First examination report despatched

Effective date: 20010222

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 20020126