KR100884679B1 - 발광 다이오드 구동 회로 - Google Patents
발광 다이오드 구동 회로 Download PDFInfo
- Publication number
- KR100884679B1 KR100884679B1 KR1020020007411A KR20020007411A KR100884679B1 KR 100884679 B1 KR100884679 B1 KR 100884679B1 KR 1020020007411 A KR1020020007411 A KR 1020020007411A KR 20020007411 A KR20020007411 A KR 20020007411A KR 100884679 B1 KR100884679 B1 KR 100884679B1
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- Prior art keywords
- led
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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]
- H05B45/40—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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
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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]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
Description
Claims (9)
- 액정 패널의 백 라이트로서 이용되는 복수의 LED를 구동하는 LED 구동 회로에 있어서,저항과, 기준 전압과 상기 저항의 전압의 차전압을 증폭하여 출력 신호를 출력하는 오차 증폭기와, 상기 출력 신호에 기초하여 상기 저항에 흐르는 정전류를 출력하는 트랜지스터를 갖는 정전류 발생 회로,상기 정전류에 기초한 전류를 출력하는 전류 미러 회로,상기 정전류에 기초한 전류에 의해서 구동되는, 상기 복수의 LED 중 1개 이상의 LED로 이루어지는 하나의 LED군,상기 정전류에 기초한 전류에 의해서 구동되는, 상기 복수의 LED 중 1개 이상의 LED로 이루어지는 다른 LED군,상기 전류 미러 회로로부터 상기 하나의 LED군으로의 전류를 제어하고, 1개 이상의 스위치로 이루어지는 하나의 스위치군,상기 전류 미러 회로로부터 상기 다른 LED군으로의 전류를 제어하고, 1개 이상의 스위치로 이루어지는 다른 스위치군,상기 하나의 스위치군을 소정 주기로 온 오프 제어하고, 상기 다른 스위치군을 상기 소정 주기로부터 반주기 어긋난 주기로 온 오프 제어하는 스위치 제어 회로를 구비하고 있는 것을 특징으로 하는 LED 구동 회로.
- 제1항에 있어서, 상기 스위치 제어 회로는, 외부로부터의 신호에 의해, 상기 하나의 스위치군 및 상기 다른 스위치군을 통해, 상기 하나의 LED군 및 상기 다른 LED군 중 소정의 LED를 선택하여 동작시키는 것을 특징으로 하는 LED 구동 회로.
- 제1항에 있어서, 상기 스위치 제어 회로는, 외부로부터의 신호에 의해, 상기 하나의 스위치군 및 상기 다른 스위치군을 통해, 상기 하나의 LED군 및 상기 다른 LED군의 각 LED의 점멸 주기 또는 점등 시간을 제어하는 것을 특징으로 하는 LED 구동 회로.
- 제1항에 있어서, 상기 정전류 발생 회로는, 외부로부터의 신호에 의해, 상기 저항의 값을 변화시키는 것을 특징으로 하는 LED 구동 회로.
- 제1항에 있어서, 상기 정전류 발생 회로는, 외부로부터의 신호에 의해, 상기 기준 전압의 값을 변화시키는 것을 특징으로 하는 LED 구동 회로.
- 제1항에 있어서, 상기 정전류 발생 회로는, 온도에 의해 상기 저항의 값을 변화시키는 것을 특징으로 하는 LED 구동 회로.
- 제1항에 있어서, 상기 정전류 발생 회로는, 온도에 의해 상기 기준 전압의 값을 변화시키는 것을 특징으로 하는 LED 구동 회로.
- 삭제
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Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2001032261 | 2001-02-08 | ||
JPJP-P-2001-00032261 | 2001-02-08 | ||
JPJP-P-2002-00020623 | 2002-01-29 | ||
JP2002020623A JP3957150B2 (ja) | 2001-02-08 | 2002-01-29 | Led駆動回路 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020080030194A Division KR100898209B1 (ko) | 2001-02-08 | 2008-04-01 | 발광 다이오드 구동 회로 |
Publications (2)
Publication Number | Publication Date |
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KR20020066216A KR20020066216A (ko) | 2002-08-14 |
KR100884679B1 true KR100884679B1 (ko) | 2009-02-18 |
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Application Number | Title | Priority Date | Filing Date |
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KR1020020007411A KR100884679B1 (ko) | 2001-02-08 | 2002-02-08 | 발광 다이오드 구동 회로 |
KR1020080030194A KR100898209B1 (ko) | 2001-02-08 | 2008-04-01 | 발광 다이오드 구동 회로 |
Family Applications After (1)
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KR1020080030194A KR100898209B1 (ko) | 2001-02-08 | 2008-04-01 | 발광 다이오드 구동 회로 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6980181B2 (ko) |
JP (1) | JP3957150B2 (ko) |
KR (2) | KR100884679B1 (ko) |
CN (1) | CN100444701C (ko) |
TW (1) | TWI274426B (ko) |
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- 2002-02-07 US US10/068,384 patent/US6980181B2/en not_active Expired - Lifetime
- 2002-02-08 KR KR1020020007411A patent/KR100884679B1/ko active IP Right Grant
- 2002-02-08 CN CNB021070784A patent/CN100444701C/zh not_active Expired - Fee Related
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Also Published As
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JP2002319707A (ja) | 2002-10-31 |
US20020105373A1 (en) | 2002-08-08 |
TWI274426B (en) | 2007-02-21 |
JP3957150B2 (ja) | 2007-08-15 |
CN1370035A (zh) | 2002-09-18 |
CN100444701C (zh) | 2008-12-17 |
KR20020066216A (ko) | 2002-08-14 |
KR20080034864A (ko) | 2008-04-22 |
US6980181B2 (en) | 2005-12-27 |
KR100898209B1 (ko) | 2009-05-18 |
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