Invention Grant
US09596723B2 PWM signal generating circuit for DC-DC converter using dimming signal and LED driving circuit having the same in direct digital dimming method
有权
采用调光信号的DC-DC转换器的PWM信号发生电路和具有直接数字调光方式的LED驱动电路
- Patent Title: PWM signal generating circuit for DC-DC converter using dimming signal and LED driving circuit having the same in direct digital dimming method
- Patent Title (中): 采用调光信号的DC-DC转换器的PWM信号发生电路和具有直接数字调光方式的LED驱动电路
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Application No.: US13285253Application Date: 2011-10-31
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Publication No.: US09596723B2Publication Date: 2017-03-14
- Inventor: Beom-seon Ryu , Chang-sik Lim
- Applicant: Beom-seon Ryu , Chang-sik Lim
- Applicant Address: KR Cheongju-si
- Assignee: Magnachip Semiconductor, Ltd.
- Current Assignee: Magnachip Semiconductor, Ltd.
- Current Assignee Address: KR Cheongju-si
- Agency: NSIP Law
- Priority: KR10-2010-0111761 20101110
- Main IPC: H05B33/08
- IPC: H05B33/08 ; G09G3/34
Abstract:
An LED driving circuit is provided. 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.
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