TWI350497B - Backlight unit for liquid crystal display - Google Patents

Backlight unit for liquid crystal display

Info

Publication number
TWI350497B
TWI350497B TW092134398A TW92134398A TWI350497B TW I350497 B TWI350497 B TW I350497B TW 092134398 A TW092134398 A TW 092134398A TW 92134398 A TW92134398 A TW 92134398A TW I350497 B TWI350497 B TW I350497B
Authority
TW
Taiwan
Prior art keywords
light emitting
devices
electrically conductive
emitting devices
output
Prior art date
Application number
TW092134398A
Other languages
English (en)
Other versions
TW200423000A (en
Inventor
Hyeong-Yong Jang
Original Assignee
Samsung Electronics Co Ltd
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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of TW200423000A publication Critical patent/TW200423000A/zh
Application granted granted Critical
Publication of TWI350497B publication Critical patent/TWI350497B/zh

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133604—Direct backlight with lamps
    • 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
    • G09G3/3406—Control of illumination source
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133612—Electrical details
    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent lamps

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Led Devices (AREA)
  • Electroluminescent Light Sources (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
TW092134398A 2002-12-06 2003-12-05 Backlight unit for liquid crystal display TWI350497B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020020077307A KR100940563B1 (ko) 2002-12-06 2002-12-06 액정 표시 장치용 백라이트 어셈블리

Publications (2)

Publication Number Publication Date
TW200423000A TW200423000A (en) 2004-11-01
TWI350497B true TWI350497B (en) 2011-10-11

Family

ID=32310895

Family Applications (1)

Application Number Title Priority Date Filing Date
TW092134398A TWI350497B (en) 2002-12-06 2003-12-05 Backlight unit for liquid crystal display

Country Status (7)

Country Link
US (2) US7173381B2 (zh)
EP (1) EP1426778B1 (zh)
JP (1) JP4746265B2 (zh)
KR (1) KR100940563B1 (zh)
CN (1) CN100573262C (zh)
AT (1) ATE520036T1 (zh)
TW (1) TWI350497B (zh)

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* Cited by examiner, † Cited by third party
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KR100940563B1 (ko) * 2002-12-06 2010-02-03 삼성전자주식회사 액정 표시 장치용 백라이트 어셈블리
KR100595313B1 (ko) * 2004-03-15 2006-07-03 엘지.필립스 엘시디 주식회사 백라이트 유닛의 램프 점등장치
TWI253047B (en) * 2004-06-16 2006-04-11 Chi Mei Optoelectronics Corp Method for controlling operations of a backlight unit of a liquid crystal display
KR100632681B1 (ko) * 2004-06-30 2006-10-12 엘지.필립스 엘시디 주식회사 외부전극 형광램프 및 그 제조방법
KR101126477B1 (ko) * 2004-10-25 2012-03-30 엘지디스플레이 주식회사 램프 구동장치 및 구동방법과 이를 이용한 액정표시장치
TWI285776B (en) * 2005-10-06 2007-08-21 Au Optronics Corp Backlight module and liquid crystal display device incorporating the same
US8618901B2 (en) 2007-05-16 2013-12-31 Nec Corporation Power acquisition device and power acquisition method
US7969100B2 (en) * 2007-05-17 2011-06-28 Liberty Hardware Manufacturing Corp. Bulb type detector for dimmer circuit and inventive resistance and short circuit detection
US20080316165A1 (en) * 2007-06-20 2008-12-25 Tovis Co., Ltd. Liquid crystal display having inverter for controlling back light for liquid crystal display panel having a variety of shapes to obtain uniform luminance
KR101404584B1 (ko) * 2009-02-19 2014-06-11 엘지디스플레이 주식회사 액정표시장치용 백라이트 유닛 및 그 백라이트 유닛의 구동방법
TWI439759B (zh) * 2009-03-13 2014-06-01 Chunghwa Picture Tubes Ltd 改善水波紋現象之液晶顯示器及方法
TWI457050B (zh) * 2010-04-16 2014-10-11 Innolux Corp 背光模組與液晶顯示裝置
CN106855764B (zh) * 2015-12-09 2023-05-02 安徽精卓光显技术有限责任公司 触摸显示装置

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JPH0933615A (ja) * 1995-07-19 1997-02-07 Advantest Corp 半導体メモリ試験装置のメモリ不良解析装置
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KR20020063371A (ko) 2001-01-29 2002-08-03 메카텍스 (주) 액정표시 패널 검사장치
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KR100409004B1 (ko) 2001-05-21 2003-12-06 엘지전자 주식회사 세탁기의 브레이크 밴드 고정구조
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US6724126B2 (en) * 2002-05-30 2004-04-20 Shin Jiuh Corp. Multi-load piezoelectric transformation circuit driver module
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TWI281576B (en) * 2004-10-21 2007-05-21 Au Optronics Corp Module and method for controlling a backlight module and LCD for thereof

Also Published As

Publication number Publication date
EP1426778B1 (en) 2011-08-10
KR100940563B1 (ko) 2010-02-03
US7755301B2 (en) 2010-07-13
JP4746265B2 (ja) 2011-08-10
CN1523428A (zh) 2004-08-25
US20040113631A1 (en) 2004-06-17
TW200423000A (en) 2004-11-01
ATE520036T1 (de) 2011-08-15
EP1426778A3 (en) 2004-08-04
US7173381B2 (en) 2007-02-06
CN100573262C (zh) 2009-12-23
JP2004191975A (ja) 2004-07-08
US20070097071A1 (en) 2007-05-03
KR20040049512A (ko) 2004-06-12
EP1426778A2 (en) 2004-06-09

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MM4A Annulment or lapse of patent due to non-payment of fees