WO2008099979A3 - Apparatus for driving led display panel - Google Patents

Apparatus for driving led display panel Download PDF

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Publication number
WO2008099979A3
WO2008099979A3 PCT/KR2007/000819 KR2007000819W WO2008099979A3 WO 2008099979 A3 WO2008099979 A3 WO 2008099979A3 KR 2007000819 W KR2007000819 W KR 2007000819W WO 2008099979 A3 WO2008099979 A3 WO 2008099979A3
Authority
WO
WIPO (PCT)
Prior art keywords
current
group
hlgn
hlg1
hlbn
Prior art date
Application number
PCT/KR2007/000819
Other languages
French (fr)
Other versions
WO2008099979A2 (en
Inventor
Chi-Ho Song
Sergiy Nedilko
Original Assignee
Xmpdisplay Co Ltd
Chi-Ho Song
Sergiy Nedilko
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 Xmpdisplay Co Ltd, Chi-Ho Song, Sergiy Nedilko filed Critical Xmpdisplay Co Ltd
Priority to KR1020097019214A priority Critical patent/KR20100005023A/en
Priority to PCT/KR2007/000819 priority patent/WO2008099979A2/en
Publication of WO2008099979A2 publication Critical patent/WO2008099979A2/en
Publication of WO2008099979A3 publication Critical patent/WO2008099979A3/en

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
    • G09G3/30—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 electroluminescent panels
    • G09G3/32—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 electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter 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
    • G09G2320/06—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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • 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
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection
    • G09G2330/045—Protection against panel overheating
    • 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
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Landscapes

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

Abstract

The invention relates to an apparatus for driving LED panels. All the LEDs (HLR1...HLRn, HLG1...HLGn, HLB1...HLBn) are divided into three separate groups (with red /R/, green /G/ and blue /B/ color respectively) where LEDs (HLR1...HLRn, HLG1...HLGn, HLB1... HLBn) are serially connected within each group. Each group is driven by a special set of two current regulators, a current limiter (CLR, CLG, CLB) and a dynamic current regulator (CRR, CRG, CRB). All the groups are supplied from a common high- voltage DC power supply, and the mentioned individual sets of current regulators are serially coupled with the groups. Thus, the current can be set for each R, G, B group separately and independently while in operation. This makes it easy to adjust brightness, color temperature and gamma correction. During the turn-off period, current from the LEDs (HLR1...HLRn, HLG1...HLGn, HLB1... HLBn) is shunted away by MOSFET parallel n-channel switches (QR1...QRn, QG1...QGn, QB1...QBn). This allows the total current to the group to be maintained constant, and the total current consumption of the LED display panel does not exceed the third current consumption of a conventional LED panel.
PCT/KR2007/000819 2007-02-15 2007-02-15 Apparatus for driving led display panel WO2008099979A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020097019214A KR20100005023A (en) 2007-02-15 2007-02-15 Led's driving apparatus in display panel
PCT/KR2007/000819 WO2008099979A2 (en) 2007-02-15 2007-02-15 Apparatus for driving led display panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2007/000819 WO2008099979A2 (en) 2007-02-15 2007-02-15 Apparatus for driving led display panel

Publications (2)

Publication Number Publication Date
WO2008099979A2 WO2008099979A2 (en) 2008-08-21
WO2008099979A3 true WO2008099979A3 (en) 2009-05-28

Family

ID=39690621

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2007/000819 WO2008099979A2 (en) 2007-02-15 2007-02-15 Apparatus for driving led display panel

Country Status (2)

Country Link
KR (1) KR20100005023A (en)
WO (1) WO2008099979A2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101674689B (en) * 2008-09-11 2013-01-30 谢婉毓 Color temperature controller of light-emitting diodes (LED) and color temperature controlling method thereof
US8174212B2 (en) 2008-11-30 2012-05-08 Microsemi Corp.—Analog Mixed Signal Group Ltd. LED string driver with light intensity responsive to input voltage
RU2479165C2 (en) * 2011-06-07 2013-04-10 Общество с ограниченной ответственностью "ЭЛиПС-О" Lighting device
KR101333216B1 (en) * 2012-02-28 2013-11-26 영남대학교 산학협력단 Color image display, tough control system and method for detection touch action
US8890045B2 (en) 2012-03-01 2014-11-18 Avago Technologies General Ip (Singapore) Pte. Ltd. Optical encoder with a current regulating circuit for a light emitter
DE102012206888A1 (en) * 2012-04-26 2013-10-31 Zumtobel Lighting Gmbh LED array
CN103218980B (en) * 2013-03-27 2015-06-03 京东方科技集团股份有限公司 Color temperature regulating method, color temperature regulating device and display device
KR102599600B1 (en) 2016-11-23 2023-11-07 삼성전자주식회사 Display apparatus and driving method thereof
CN108898989A (en) 2018-07-11 2018-11-27 杭州视芯科技有限公司 LED display and its driving method
WO2022021123A1 (en) * 2020-07-29 2022-02-03 西安钛铂锶电子科技有限公司 Display drive circuit and method, led display panel, and display apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050243022A1 (en) * 2004-04-30 2005-11-03 Arques Technology, Inc. Method and IC driver for series connected R, G, B LEDs
EP1615195A1 (en) * 2003-04-16 2006-01-11 Komaden Corporation Display led drive circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1615195A1 (en) * 2003-04-16 2006-01-11 Komaden Corporation Display led drive circuit
US20050243022A1 (en) * 2004-04-30 2005-11-03 Arques Technology, Inc. Method and IC driver for series connected R, G, B LEDs

Also Published As

Publication number Publication date
KR20100005023A (en) 2010-01-13
WO2008099979A2 (en) 2008-08-21

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