JP2008010852A - Ledを備えたlcdバックライトの駆動システム - Google Patents
Ledを備えたlcdバックライトの駆動システム Download PDFInfo
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- JP2008010852A JP2008010852A JP2007143096A JP2007143096A JP2008010852A JP 2008010852 A JP2008010852 A JP 2008010852A JP 2007143096 A JP2007143096 A JP 2007143096A JP 2007143096 A JP2007143096 A JP 2007143096A JP 2008010852 A JP2008010852 A JP 2008010852A
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- 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
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- 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
- G09G3/3413—Details of control of colour illumination sources
-
- 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
- G02F1/133603—Direct backlight with LEDs
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- 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]
- H05B45/20—Controlling the colour of the light
- H05B45/22—Controlling the colour of the light using optical feedback
-
- 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
- H05B45/3725—Switched mode power supply [SMPS]
-
- 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
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
-
- 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
-
- 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
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/375—Switched mode power supply [SMPS] using buck topology
-
- 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
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
-
- 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]
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
- Liquid Crystal (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
【解決手段】白色光を放出できるような配置構造にLEDが配置された基板を有する光源部;交流電圧を直流電圧に変換する交流−直流変換部と、交流−直流変換部で変換された直流電圧を、赤色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する赤色LED用直流−直流変換部と、緑色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する緑色LED用直流−直流変換部と、青色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する青色LED用直流−直流変換部とを有するSMPS部;及び、赤色、緑色、青色LEDが一定の出力を維持するように、赤色、緑色、青色LEDアレイに流れる電流を制御する少なくとも1つの赤色、緑色、青色LED用定電流制御部を有する制御ボード部;を備えてなる、LEDを備えたLCDバックライトの駆動システムを提供する。
【選択図】図2
Description
図1は、従来のLEDを備えたLCDバックライトの駆動システムを示す構成図である。
赤色光を発光する複数の赤色LEDが直列連結された少なくとも1つの赤色LEDアレイ、緑色光を発光する複数の緑色LEDが直列連結された少なくとも1つの緑色LEDアレイ、青色光を発光する複数の青色LEDが直列連結された少なくとも1つの青色LEDアレイ、及びこれらのLEDから放出される光が混合されて白色光を放出できるような配置構造に前記赤色、緑色、青色LEDアレイが配置された基板を有する光源部と、
外部から入力された交流電圧を、直流電圧に変換する交流−直流変換部、前記交流−直流変換部で変換された直流電圧を、前記赤色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する赤色LED用直流−直流変換部、前記交流−直流変換部で変換された直流電圧を、前記緑色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する緑色LED用直流−直流変換部、及び前記交流−直流変換部で変換された直流電圧を、前記青色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する青色LED用直流−直流変換部を有するSMPS部と、
前記赤色、緑色、青色LEDが一定の出力を維持するように前記赤色、緑色、青色LEDアレイに流れる電流を制御する少なくとも1つの赤色、緑色、青色LED用定電流制御部を有する制御ボード部と、
を備える、LEDを備えたLCDバックライトの駆動システムを提供する。
211 交流−直流変換部
212,213,214 赤色、緑色、青色LED用直流−直流変換部
22 制御ボード部
221,222,223 赤色、緑色、青色LED用定電流制御部
224 マイクロコントローラ
23 光源部
231 基板
232 LED
24 センサー部
Claims (4)
- 赤色光を発光する複数の赤色LEDが直列連結された少なくとも1つの赤色LEDアレイ、緑色光を発光する複数の緑色LEDが直列連結された少なくとも1つの緑色LEDアレイ、青色光を発光する複数の青色LEDが直列連結された少なくとも1つの青色LEDアレイ、及びこれらのLEDから放出される光が混合されて白色光を放出できるような配置構造に前記赤色、緑色、青色LEDアレイが配置された基板を有する光源部と、
外部から入力された交流電圧を直流電圧に変換する交流−直流変換部、前記交流−直流変換部で変換された直流電圧を、前記赤色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する赤色LED用直流−直流変換部、前記交流−直流変換部で変換された直流電圧を、前記緑色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する緑色LED用直流−直流変換部、及び前記交流−直流変換部で変換された直流電圧を、前記青色LEDアレイを駆動するのに適切な大きさの直流電圧に変換する青色LED用直流−直流変換部を有するSMPS部と、
前記赤色、緑色、青色LEDが一定の出力を維持するように前記赤色、緑色、青色LEDアレイに流れる電流を制御する少なくとも1つの赤色、緑色、青色LED用定電流制御部を有する制御ボード部と、
を備える、LEDを備えたLCDバックライトの駆動システム。 - 前記LCDバックライトの駆動システムは、前記光源部から放出される光の輝度及び/または色を検出するセンサー部をさらに備え、
前記制御ボード部は、前記センサー部より検出された光の輝度及び/または色が、既設定された光の輝度及び色と一致するように、前記赤色、緑色、青色LEDの出力を決定するマイクロコントローラをさらに備え、
前記少なくとも1つの赤色、緑色、青色LED用定電流制御部は、前記赤色、緑色、青色LEDが前記マイクロコントローラによって決定された出力を維持するように、前記赤色、緑色、青色LEDアレイに流れる電流を制御することを特徴とする、請求項1に記載のLEDを備えたLCDバックライトの駆動システム。 - 前記基板は、複数の分割領域を有し、該各分割領域につきそれぞれ1つの赤色、緑色、青色LEDアレイが配置され、
前記赤色、緑色、青色LED用定電流制御部は、1つの前記赤色、緑色、青色LEDアレイにつき1つずつそれぞれ備えられたことを特徴とする、請求項1に記載のLEDを備えたLCDバックライトの駆動システム。 - 前記光源部は、複数の赤色LEDアレイ、複数のLEDアレイ及び複数の青色LEDアレイを備え、
前記複数の赤色LEDアレイのそれぞれに含まれた赤色LEDの個数はいずれも同一であり、前記複数の緑色LEDアレイのそれぞれに含まれた緑色LEDの個数はいずれも同一であり、前記複数の青色LEDアレイのそれぞれに含まれた青色LEDの個数はいずれも同一であることを特徴とする、請求項1に記載のLEDを備えたLCDバックライトの駆動システム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2006-0059100 | 2006-06-29 | ||
KR1020060059100A KR20080001050A (ko) | 2006-06-29 | 2006-06-29 | Led를 구비한 lcd 백라이트 구동 시스템 |
Publications (2)
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JP2008010852A true JP2008010852A (ja) | 2008-01-17 |
JP4934508B2 JP4934508B2 (ja) | 2012-05-16 |
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Application Number | Title | Priority Date | Filing Date |
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JP2007143096A Expired - Fee Related JP4934508B2 (ja) | 2006-06-29 | 2007-05-30 | Ledを備えたlcdバックライトの駆動システム |
Country Status (5)
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US (1) | US20080002103A1 (ja) |
JP (1) | JP4934508B2 (ja) |
KR (1) | KR20080001050A (ja) |
NL (1) | NL2000669C2 (ja) |
TW (1) | TWI370425B (ja) |
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WO2009093363A1 (ja) * | 2008-01-22 | 2009-07-30 | Sharp Kabushiki Kaisha | 照明装置、表示装置、及びテレビ受信装置 |
WO2009110513A1 (ja) * | 2008-03-07 | 2009-09-11 | ミツミ電機株式会社 | 液晶バックライト装置 |
JP2009252555A (ja) * | 2008-04-07 | 2009-10-29 | Sharp Corp | 照明装置 |
JP2009259598A (ja) * | 2008-04-16 | 2009-11-05 | Shozo Toyohisa | Led調光照明システム |
JP2009295449A (ja) * | 2008-06-05 | 2009-12-17 | Toshiba Lighting & Technology Corp | 照明器具 |
JP2013140780A (ja) * | 2011-12-09 | 2013-07-18 | Semiconductor Energy Lab Co Ltd | 発光装置及び発光装置の駆動方法 |
TWI495392B (zh) * | 2013-01-07 | 2015-08-01 | Univ Lunghwa Sci & Technology | High efficiency single stage return light type LED lamp with temperature compensation |
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JP2009266804A (ja) * | 2008-03-31 | 2009-11-12 | Yamagata Promotional Organization For Industrial Technology | 照明器具の給電装置 |
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JP5244181B2 (ja) * | 2008-07-29 | 2013-07-24 | シャープ株式会社 | 照明装置、表示装置、及びテレビ受信装置 |
KR100908733B1 (ko) * | 2008-10-17 | 2009-07-22 | (주)이노셈코리아 | 디밍 송·수신 모듈로 이루어진 led 형광등 |
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- 2007-05-30 NL NL2000669A patent/NL2000669C2/nl not_active IP Right Cessation
- 2007-05-30 JP JP2007143096A patent/JP4934508B2/ja not_active Expired - Fee Related
- 2007-05-31 US US11/806,309 patent/US20080002103A1/en not_active Abandoned
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WO2009093363A1 (ja) * | 2008-01-22 | 2009-07-30 | Sharp Kabushiki Kaisha | 照明装置、表示装置、及びテレビ受信装置 |
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WO2009110513A1 (ja) * | 2008-03-07 | 2009-09-11 | ミツミ電機株式会社 | 液晶バックライト装置 |
US8482512B2 (en) | 2008-03-07 | 2013-07-09 | Mitsumi Electric Co., Ltd. | Liquid crystal backlight apparatus |
JP2009252555A (ja) * | 2008-04-07 | 2009-10-29 | Sharp Corp | 照明装置 |
JP2009259598A (ja) * | 2008-04-16 | 2009-11-05 | Shozo Toyohisa | Led調光照明システム |
JP2009295449A (ja) * | 2008-06-05 | 2009-12-17 | Toshiba Lighting & Technology Corp | 照明器具 |
JP2013140780A (ja) * | 2011-12-09 | 2013-07-18 | Semiconductor Energy Lab Co Ltd | 発光装置及び発光装置の駆動方法 |
TWI495392B (zh) * | 2013-01-07 | 2015-08-01 | Univ Lunghwa Sci & Technology | High efficiency single stage return light type LED lamp with temperature compensation |
Also Published As
Publication number | Publication date |
---|---|
NL2000669A1 (nl) | 2008-01-03 |
NL2000669C2 (nl) | 2010-11-08 |
TWI370425B (en) | 2012-08-11 |
TW200802234A (en) | 2008-01-01 |
JP4934508B2 (ja) | 2012-05-16 |
US20080002103A1 (en) | 2008-01-03 |
KR20080001050A (ko) | 2008-01-03 |
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