Invention Grant
- Patent Title: LED driving circuit and method of controlling the same
- Patent Title (中): LED驱动电路及其控制方法
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Application No.: US12418722Application Date: 2009-04-06
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Publication No.: US08384655B2Publication Date: 2013-02-26
- Inventor: Kuan-Jen Tseng , Ching-Wei Hsueh
- Applicant: Kuan-Jen Tseng , Ching-Wei Hsueh
- Applicant Address: TW Tainan County
- Assignee: Himax Analogic, Inc.
- Current Assignee: Himax Analogic, Inc.
- Current Assignee Address: TW Tainan County
- Agency: McClure, Qualey & Rodack, LLP
- Main IPC: G09G3/36
- IPC: G09G3/36

Abstract:
An LED driving circuit includes a control logic circuit, a dimming circuit and a counter. The control logic circuit is electrically coupled to an enable pin for receiving an input signal, and asserts an internal enable signal for activating the LED driving circuit. The dimming circuit is electrically coupled to the enable pin and outputs a control signal for controlling current flowing into at least one load connected to the LED driving circuit. The counter identifies the input signal based on a clock signal and asserts a detection signal for informing the control logic circuit of de-asserting the internal enable signal to de-activate the LED driving circuit when identifying the input signal as the enable signal being de-asserted for a predetermined period of the clock signal. A method of controlling an LED driving circuit is also disclosed herein.
Public/Granted literature
- US20100253657A1 LED Driving Circuit and Method of Controlling the Same Public/Granted day:2010-10-07
Information query
IPC分类: