发明授权
US08421365B2 Apparatus for driving light emitting device using pulse-width modulation
有权
用于使用脉冲宽度调制驱动发光装置的装置
- 专利标题: Apparatus for driving light emitting device using pulse-width modulation
- 专利标题(中): 用于使用脉冲宽度调制驱动发光装置的装置
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申请号: US12770953申请日: 2010-04-30
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公开(公告)号: US08421365B2公开(公告)日: 2013-04-16
- 发明人: Seung Kon Kong , Jae Shin Lee , Jung Hyun Kim , Jung Sun Kwon , Bo Hyun Hwang
- 申请人: Seung Kon Kong , Jae Shin Lee , Jung Hyun Kim , Jung Sun Kwon , Bo Hyun Hwang
- 申请人地址: KR
- 专利权人: Samsung Electro-Mechanics Co., Ltd.
- 当前专利权人: Samsung Electro-Mechanics Co., Ltd.
- 当前专利权人地址: KR
- 代理机构: Lowe Hauptman Ham & Berner, LLP
- 优先权: KR10-2009-0125656 20091216
- 主分类号: H05B39/02
- IPC分类号: H05B39/02
摘要:
An apparatus for driving a light emitting device (LED) is provided. The apparatus for driving the LED includes a first driving control element, a first current detection unit, a first effective value detection unit, a first reference signal generation unit, and a first comparison unit. The first driving control element controls a current flowing through a first LED channel, in response to a first pulse-width modulated control signal. The first current detection unit detects the current flowing through the first LED channel. The first effective value detection unit detects an effective value of the current detected by the first current detection unit. The first reference signal generation unit generates a preset reference signal having a sawtooth waveform. The first comparison unit compares the reference signal from the first reference signal generation unit with the effective value from the first effective value detection unit.