PWM signal generating circuit and method, and LED driving circuit thereof

The present invention provides a PWM signal generating circuit and method, and an LED driving circuit thereof. The LED driving circuit includes an input unit which receives an input dimming signal for driving an LED array, a PWM signal generating unit which extends an on-period of the input dimming...

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Bibliographic Details
Main Authors RYU BEOM-SEON, LIM CHANG-SIK
Format Patent
LanguageChinese
English
Published 23.05.2012
Subjects
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PHYSICS
SEALS
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Summary:The present invention provides a PWM signal generating circuit and method, and an LED driving circuit thereof. The LED driving circuit includes an input unit which receives an input dimming signal for driving an LED array, a PWM signal generating unit which extends an on-period of the input dimming signal to form an extended dimming signal, and generates a PWM signal using the extended dimming signal, a DC-DC converter which supplies output voltage to the LED array using the PWM signal, and an LED driving unit which drives the LED array using the input dimming signal.
Bibliography:Application Number: CN201110372278