Invention Grant
- Patent Title: Circuits and methods for controlling a light source
- Patent Title (中): 用于控制光源的电路和方法
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Application No.: US12856795Application Date: 2010-08-16
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Publication No.: US08120280B2Publication Date: 2012-02-21
- Inventor: Xinmin Yi , Ching-Chuan Kuo , Jianping Wang , Feng Shi
- Applicant: Xinmin Yi , Ching-Chuan Kuo , Jianping Wang , Feng Shi
- Applicant Address: US CA Santa Clara
- Assignee: O2 Micro, Inc
- Current Assignee: O2 Micro, Inc
- Current Assignee Address: US CA Santa Clara
- Priority: CN201010225108 20100702
- Main IPC: G05F1/00
- IPC: G05F1/00
Abstract:
A driving circuit for controlling a light source includes a frequency controller and a switch module. The frequency controller is operable for receiving a first dimming signal for controlling the light source to achieve a predetermined brightness, and for generating a second dimming signal having a frequency out of one or more predetermined ranges according to the first dimming signal when the frequency of the first dimming signal is within the predetermined ranges. The switch module coupled to the frequency controller is operable for switching on and off alternately to achieve the predetermined brightness of the light source according to the second dimming signal when the frequency of the first dimming signal is within the predetermined ranges and according to the first dimming signal when the frequency of the first dimming signal is out of the predetermined ranges.
Public/Granted literature
- US20110140621A1 CIRCUITS AND METHODS FOR CONTROLLING A LIGHT SOURCE Public/Granted day:2011-06-16
Information query
IPC分类:
