Invention Grant
US07919931B2 LED driving circuit, illuminating device, and electro-optical device
有权
LED驱动电路,照明装置和电光装置
- Patent Title: LED driving circuit, illuminating device, and electro-optical device
- Patent Title (中): LED驱动电路,照明装置和电光装置
-
Application No.: US11380050Application Date: 2006-04-25
-
Publication No.: US07919931B2Publication Date: 2011-04-05
- Inventor: Takashi Kurumisawa
- Applicant: Takashi Kurumisawa
- Applicant Address: JP Tokyo
- Assignee: Epson Imaging Devices Corporation
- Current Assignee: Epson Imaging Devices Corporation
- Current Assignee Address: JP Tokyo
- Agency: Lowe, Hauptman, Ham & Berner, LLP
- Priority: JP2005-127484 20050426; JP2005-365898 20051220
- Main IPC: H05B37/02
- IPC: H05B37/02

Abstract:
An LED driving circuit for driving a plurality of different LEDs includes: a first power supply circuit that is supplied with an input voltage for generating a plurality of driving voltages and a reference voltage with respect to the input voltage and generates a first output voltage and a second output voltage from the input voltage, on the basis of a first control signal; and a second power supply circuit that is supplied with the first output voltage, the second output voltage, and the reference voltage, selects a voltage for driving the LEDs, on the basis of a second control signal, and outputs them.
Public/Granted literature
- US20060238465A1 LED DRIVING CIRCUIT, ILLUMINATING DEVICE, AND ELECTRO-OPTICAL DEVICE Public/Granted day:2006-10-26
Information query