Invention Grant
- Patent Title: Light-emitting diode (LED) driving circuit
- Patent Title (中): 发光二极管（LED）驱动电路
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Application No.: US12913837Application Date: 2010-10-28
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Publication No.: US08525774B2Publication Date: 2013-09-03
- Inventor: Li-Wei Lin , Chen-Chiang Lee , Chi-Hsin Lee , Wen-Ming Lin , Chun-Chi Liao , Yuan-Po Huang
- Applicant: Li-Wei Lin , Chen-Chiang Lee , Chi-Hsin Lee , Wen-Ming Lin , Chun-Chi Liao , Yuan-Po Huang
- Applicant Address: HK Harbour
- Assignee: Top Victory Investments Ltd.
- Current Assignee: Top Victory Investments Ltd.
- Current Assignee Address: HK Harbour
- Agency: Kamrath IP Lawfirm, P.A.
- Agent Alan Kamrath
- Priority: TW98136410A 20091028; TW98138314A 20091111
- Main IPC: G09G3/36
- IPC: G09G3/36 ; G09G3/10
Abstract:
A light-emitting diode (LED) driving circuit for driving a plurality of first lightbars and a plurality of second lightbars includes a first current mirror, a second current mirror and a control circuit. The first current mirror, if enabled, balances current among the first lightbars. The second current mirror, if enabled, balances current among the second lightbars. During a first period, the control circuit disables the second current mirror and adjusts the duration of enabling the first current mirror according to a dimming signal. During a second period, the control circuit disables the first current mirror and adjusts the duration of enabling the second current mirror according to the dimming signal. Therefore, only first or second lightbars are driven in each period.
Public/Granted literature
- US20110096055A1 Light-emitting Diode (LED) Driving Circuit Public/Granted day:2011-04-28
Information query
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