Invention Grant
- Patent Title: Light emitting element drive circuit
- Patent Title (中): 发光元件驱动电路
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Application No.: US14117810Application Date: 2012-04-02
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Publication No.: US08723449B2Publication Date: 2014-05-13
- Inventor: Masahiro Ide , Hideki Shioe
- Applicant: Masahiro Ide , Hideki Shioe
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2011-109828 20110516
- International Application: PCT/JP2012/059005 WO 20120402
- International Announcement: WO2012/157351 WO 20121122
- Main IPC: H05B41/36
- IPC: H05B41/36

Abstract:
An LED drive circuit (10) for driving an LED circuit (220) includes: a constant current driver (110) including transistors (111-114) whose collector terminals are respectively connected with LED rows (221-224) connected with each other in parallel and whose emitter terminals are grounded; and an LED drive control section (120) for setting a voltage to be commonly applied on the LED rows (221-224), the setting being performed in accordance with a maximum base current out of base currents of the transistors (111-114).
Public/Granted literature
- US20140097762A1 LIGHT EMITTING ELEMENT DRIVE CIRCUIT Public/Granted day:2014-04-10
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