[특허]Cold cathode backlight for avionics applications with strobe expanded dimming range

[미국특허] Cold cathode backlight for avionics applications with strobe expanded dimming range 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F21V-007/04
출원번호	US-0645083 (2000-08-24)
발명자 / 주소	James E. Shaw William G. Perreault
출원인 / 주소	Rockwell Collins, Inc.
대리인 / 주소	Nathan O. Jensen
인용정보	피인용 횟수 : 43 인용 특허 : 7

초록 ▼

A method of backlighting a flat panel display over an expanded dimming range includes providing a backlight including multiple cold cathode fluorescent lamps positionable directly behind a diffuser. Each of multiple drive circuits is adapted to independently adjust arc current of at least one of the multiple cold cathode fluorescent lamps in order to change the luminance output of the at least one of the cold cathode fluorescent lamps. Control signals are provided to each of the multiple drive circuits to separately control luminance output of different cold cathode fluorescent lamps such that at the same instant the different cold cathode fluorescent lamps are driven to substantially different luminance intensities, thereby allowing a reduction of an overall minimum luminance provided by the backlight and expanding the dimmable range of the backlight. A backlight implementing the methods of the invention is also disclosed.

대표청구항 ▼

1. A method of backlighting a flat panel display over an expanded dimming range, the method comprising:providing a backlight including a plurality of cold cathode fluorescent lamps positionable directly behind a diffuser; providing a plurality of drive circuits, wherein each of the plurality of drive circuits is adapted to adjust arc current of at least one of the plurality of cold cathode fluorescent lamps to change an electron density in the at least one of the plurality of cold cathode fluorescent lamps and to thereby change a luminance output of the at least one of the plurality of cold cathode fluorescent lamps; and providing control signals to each of the plurality of drive circuits to separately control luminance outputs of different ones of the plurality of cold cathode fluorescent lamps such that at the same instant the different ones of the plurality of cold cathode fluorescent lamps are driven to substantially different luminance intensities, thereby reducing an overall minimum luminance provided by the backlight and expanding the dimmable range of the backlight.

이 특허에 인용된 특허 (7) 인용/피인용 타임라인 분석

Speirs Jonathan Laycock (Edinburgh GB6) Fozard Anthony Roy (London GB2), Lighting system for an aircraft cabin.
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Park Eui-yeul,KRX, Liquid crystal device including backlight lamps having different spectral characteristics for adjusting display color and method of adjusting display color.
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Farrell James F. (Etobicoke CAX), Night vision backlighting system for liquid crystal displays.
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Borkowski Richard E., Night vision lighting system for use in vehicles.
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Shaw James E., Refracting optic for fluorescent lamps used in backlighting liquid crystal displays.
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Grave Duane A., Sculptured transflector for dual mode active matrix liquid crystal display backlight.
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Walsh Kevin L. ; Merrifield Robert M. ; Kelleher Kevin C. ; Vitello Robert J., Wide-range dual-backlight display apparatus.
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이 특허를 인용한 특허 (43) 인용/피인용 타임라인 분석

Henry,George C., Apparatus and method for striking a fluorescent lamp.
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Jin, Xiaoping, Arrangement suitable for driving floating CCFL based backlight.
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Kang,Sung Yong; Lee,Jeong Hwan; Park,Jong Dae; Kang,Moon Shik; Lee,Keun Woo; Youn,Sang Hyuck; Yoo,Hyeong Suk; Jung,Jae Ho; Kim,Kyu Seok, Backlight assembly and liquid crystal display apparatus having the same.
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Kim, Yong Il, Backlight assembly and liquid crystal display apparatus having the same.
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Kim,Yong Il, Backlight assembly and liquid crystal display apparatus having the same.
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Wakabayashi,Toshitsugu, Backlight system.
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Inoue,Yutaka; Ohtsuka,Kohji; Izumi,Kazuyoshi; Yoshii,Takashi, Backlight unit and liquid crystal display device using the backlight unit.
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Jin, Xiaoping, Balancing arrangement with reduced amount of balancing transformers.
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Hsu,Cheng Chia; Wu,Teng Ho; Chen,Ho Wen; Chang,Teng Kang, Bridge type phase detection device.
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Jin,Xiaoping, Current sharing scheme for multiple CCF lamp operation.
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Ball,Newton E., Current-mode direct-drive inverter.
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Jin, Xiaoping, Direct coupled balancer drive for floating lamp structure.
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Ferguson, Bruce R., Dual-slope brightness control for transflective displays.
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Chiou, Chii-Fa, Full-bridge and half-bridge compatible driver timing schedule for direct drive backlight system.
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Jin, Xiaoping, High efficiency LED driving method.
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Jin, Xiaoping, High efficiency LED driving method.
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Jin, Xiaoping; Lin, Ting-Hui, High efficiency LED driving method for odd number of LED strings.
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Ball,Newton E., Incremental distributed driver.
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Ball,Newton E., Inverter with two switching stages for driving lamp.
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Jin, Xiaoping, LED string driver arrangement with non-dissipative current balancer.
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Ball,Newton E., Lamp current control using profile synthesizer.
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Jin, Xiaoping; Kahn, Simon Mark, Method and apparatus for driving CCFL at low burst duty cycle rates.
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Ferguson, Bruce R., Method and apparatus to control display brightness with ambient light correction.
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Ferguson,Bruce R., Method and apparatus to control display brightness with ambient light correction.
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Ball,Newton E., Method and apparatus to drive LED arrays using time sharing technique.
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Oehlert, Steve L.; Wenger, Jason C.; Postnikov, Alex; Pelzer, Andrew M.; Barber, Sarah, Method for TAWS depiction on SVS perspective displays.
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Ball,Newton E., Nested balancing topology for balancing current among multiple lamps.
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Ferguson,Bruce R.; Henry,George C.; Holliday,Roger, Optical and temperature feedbacks to control display brightness.
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Jin, Xiaoping, Primary side current balancing scheme for multiple CCF lamp operation.
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Jin,Xiaoping, Primary side current balancing scheme for multiple CCF lamp operation.
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Jin, Xiaoping, Split phase inverters for CCFL backlight system.
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Jin,Xiaoping, Split phase inverters for CCFL backlight system.
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Henry, George C.; Lacombe, David K, Striking and open lamp regulation for CCFL controller.
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Henry, George C.; Lacombe, David K., Striking and open lamp regulation for CCFL controller.
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McCusker, Patrick Dennis; Rademaker, Richard Marcel; Jinkins, Richard D.; Wichgers, Joel Michael; Woodell, Daniel L., System and method for displaying radar-estimated terrain.
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Ball,Newton E., Systems and methods for a transformer configuration for driving multiple gas discharge tubes in parallel.
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Ball,Newton E., Systems and methods for a transformer configuration with a tree topology for current balancing in gas discharge lamps.
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Ball,Newton E., Systems and methods for fault protection in a balancing transformer.
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Choi,Hwangsoo; Chiou,Chii Fa, Voltage regulation loop with variable gain control for inverter circuit.
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Ball,Newton E., Zigzag topology for balancing current among paralleled gas discharge lamps.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Cold cathode backlight for avionics applications with strobe expanded dimming range 원문보기