KR100862507B1 - Led 구동 디바이스 - Google Patents
Led 구동 디바이스 Download PDFInfo
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- KR100862507B1 KR100862507B1 KR1020070060347A KR20070060347A KR100862507B1 KR 100862507 B1 KR100862507 B1 KR 100862507B1 KR 1020070060347 A KR1020070060347 A KR 1020070060347A KR 20070060347 A KR20070060347 A KR 20070060347A KR 100862507 B1 KR100862507 B1 KR 100862507B1
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- led
- converter
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- pwm
- control logic
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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
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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
-
- 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
-
- 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]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
- H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/19—Controlling the light source by remote control via wireless transmission
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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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133601—Illuminating devices for spatial active dimming
-
- 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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- 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
- G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
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- 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]
Abstract
Description
더하여, 상기 스위칭부(18)는 상기 PWM 제어부(121)에 의해 온/오프 듀티가 제어됨으로써 각 채널의 LED에 흐르는 전류를 일정하게 유지시키는 기능을 수행할 수 있다. 즉, 상기 스위칭부(18)는 서로 직렬 연결된 각 채널의 LED들이 각각 연결된 단자(T5-T7)마다 개별 구비된 복수의 스위치를 포함할 수 있으며, 이 스위치들은 각 채널의 활성화/비활성화의 선택뿐만 아니라, 상기 PWM 제어부(121)에 의해 온/오프 듀티가 제어됨으로써 각 채널의 LED에 흐르는 전류가 사전설정된 크기로 일정하게 유지되게 할 수 있다.
Claims (6)
- 서로 직렬 연결된 복수의 LED를 각각 포함하는 복수의 LED 어레이를 구동하기 위한 LED 구동 디바이스에 있어서,스위치의 스위칭을 통해 외부로 부터 입력되는 직류 전압을 상기 복수의 LED 어레이 구동에 적절한 크기의 구동전압으로 변환하여 출력하는 직류/직류 변환부;상기 복수의 LED 어레이에 흐르는 전류를 온/오프하도록 상기 복수의 LED 어레이의 일단에 각각 연결되는 복수의 스위치를 포함하는 스위칭부;상기 LED 어레이에 흐르는 전류 정보 및 상기 LED 어레이에 인가되는 전압 정보 중 적어도 하나를 피드백 받아 상기 구동전압의 크기가 일정하게 유지되도록 상기 직류/직류 변환부 내에 구비된 스위치의 스위칭 듀티를 PWM 제어하며, 상기 복수의 LED 어레이 각각에 흐르는 전류가 사전 설정된 크기로 일정하게 유지되도록 상기 스위칭부에 포함된 복수의 스위치 각각의 스위칭 듀티를 제어하는 PWM 제어부를 포함하는 정전류 제어부; 및사용자에 의한 조정신호를 입력받으며, 상기 조정신호에 따라 상기 PWM 제어부를 제어하는 제어로직을 포함하는 LED 구동 디바이스.
- 제1항에 있어서,상기 정전류 제어부는, 상기 LED에 흐르는 전류 정보 및 상기 LED에 인가되는 전압 정보 중 적어도 하나를 피드백받아 상기 LED에 과전류가 흐르거나 상기 LED에 과전압이 인가되는 경우, 상기 LED에 인가되는 전압 또는 전류를 차단하도록 상기 PWM 제어부를 제어하는 보호회로부를 더 포함하는 것을 특징으로 하는 LED 구동 디바이스.
- 제1항에 있어서,상기 조정신호를 무선으로 입력 받기 위한 무선통신 프로토콜부를 더 포함하며, 상기 무선통신 프로토콜부는 상기 제어로직에 의해 무선통신의 제어가 이루어 지는 것을 특징으로 하는 LED 구동 디바이스.
- 제1항에 있어서,상기 직류/직류 변환부는, 복수의 LED 어레이를 개별적으로 구동하기 위한 다채널 직류/직류 변환부이며, 상기 PWM 제어부는 상기 각 채널에 대해 각각 개별적인 PWM 제어를 수행하는 것을 특징으로 하는 LED 구동 디바이스.
- 제4항에 있어서,상기 각 채널에 대한 PWM 제어에 위상차가 발생하도록 상기 PWM 제어부를 제어하는 PWM 위상변환부를 더 포함하는 것을 특징으로 하는 LED 구동 디바이스.
- 제1항에 있어서,상기 제어로직은, 상기 복수의 LED 어레이 중 적어도 일부의 활성화/비활성화를 결정하도록 상기 PWM 제어부를 제어하는 것을 특징로 하는 LED 구동 디바이스.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070060347A KR100862507B1 (ko) | 2007-06-20 | 2007-06-20 | Led 구동 디바이스 |
TW097122818A TWI386708B (zh) | 2007-06-20 | 2008-06-19 | 發光二極體驅動裝置 |
US12/142,375 US7723922B2 (en) | 2007-06-20 | 2008-06-19 | Light emitting diode driving device |
JP2008160273A JP5038982B2 (ja) | 2007-06-20 | 2008-06-19 | Led駆動デバイス |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020070060347A KR100862507B1 (ko) | 2007-06-20 | 2007-06-20 | Led 구동 디바이스 |
Publications (1)
Publication Number | Publication Date |
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KR100862507B1 true KR100862507B1 (ko) | 2008-10-08 |
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Application Number | Title | Priority Date | Filing Date |
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KR1020070060347A KR100862507B1 (ko) | 2007-06-20 | 2007-06-20 | Led 구동 디바이스 |
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US (1) | US7723922B2 (ko) |
JP (1) | JP5038982B2 (ko) |
KR (1) | KR100862507B1 (ko) |
TW (1) | TWI386708B (ko) |
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KR101043476B1 (ko) * | 2009-06-10 | 2011-06-23 | 삼성전기주식회사 | Led용 pwm 디밍 구동 회로 |
US8283871B2 (en) | 2009-10-30 | 2012-10-09 | Samsung Electronics Co., Ltd. | Method of driving light source and display apparatus for performing the method |
KR101353181B1 (ko) * | 2012-07-20 | 2014-01-17 | 삼성전기주식회사 | 백라이트용 전원 제어회로 |
KR20150020632A (ko) * | 2011-01-28 | 2015-02-26 | 서울반도체 주식회사 | Led 구동회로 |
KR101654111B1 (ko) * | 2016-01-28 | 2016-09-05 | 김근식 | 직류전원을 이용한 의료용 광출력장치 및 그 제어방법 |
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- 2008-06-19 US US12/142,375 patent/US7723922B2/en active Active
- 2008-06-19 JP JP2008160273A patent/JP5038982B2/ja active Active
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101043476B1 (ko) * | 2009-06-10 | 2011-06-23 | 삼성전기주식회사 | Led용 pwm 디밍 구동 회로 |
US8283871B2 (en) | 2009-10-30 | 2012-10-09 | Samsung Electronics Co., Ltd. | Method of driving light source and display apparatus for performing the method |
KR20150020632A (ko) * | 2011-01-28 | 2015-02-26 | 서울반도체 주식회사 | Led 구동회로 |
KR101964442B1 (ko) * | 2011-01-28 | 2019-04-01 | 서울반도체 주식회사 | Led 구동회로 패키지 |
KR101353181B1 (ko) * | 2012-07-20 | 2014-01-17 | 삼성전기주식회사 | 백라이트용 전원 제어회로 |
KR101654111B1 (ko) * | 2016-01-28 | 2016-09-05 | 김근식 | 직류전원을 이용한 의료용 광출력장치 및 그 제어방법 |
Also Published As
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US7723922B2 (en) | 2010-05-25 |
JP2009004782A (ja) | 2009-01-08 |
TWI386708B (zh) | 2013-02-21 |
US20080315780A1 (en) | 2008-12-25 |
TW200918997A (en) | 2009-05-01 |
JP5038982B2 (ja) | 2012-10-03 |
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