Title:
DRIVE CIRCUIT FOR USE IN LED DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/023486
Kind Code:
A1
Abstract:
A drive circuit for use in an LED device, comprising a low dropout regulating device (210), a step-up device (220), and a feedback device (230); the low dropout regulating device comprises a first input pin (211) for use in coupling with an external input voltage (Vin) to produce a first output voltage (V1) that has a low current and is stable; the step-up device (220) is coupled with the low dropout regulating device (210) to boost the first output voltage (V1) by a certain factor, so as to obtain a drive voltage (Vd) required to drive the LED device, which is then outputted by an output pin (221); the feedback device (230) is coupled with the output pin (221) of the step-up device (220) and a second input pin (212) of the low dropout regulating device (210) to feed the outputted drive voltage (Vd) back to the low dropout regulating device (210).
Inventors:
YUAN ZHIXIAN (CN)
Application Number:
PCT/CN2016/093049
Publication Date:
February 08, 2018
Filing Date:
August 03, 2016
Export Citation:
Assignee:
YUAN ZHIXIAN (CN)
International Classes:
G05F1/56
Foreign References:
| CN106163006A | 2016-11-23 | |||
| CN205847681U | 2016-12-28 | |||
| US20120139620A1 | 2012-06-07 | |||
| CN102931842A | 2013-02-13 | |||
| CN103677038A | 2014-03-26 | |||
| CN103376816A | 2013-10-30 | |||
| EP2806329A2 | 2014-11-26 | |||
| US8547135B1 | 2013-10-01 | |||
| US20150229160A1 | 2015-08-13 |
Attorney, Agent or Firm:
SHENZHEN YUANHANG INTELLECTUAL PROPERTY OFFICE（GENERAL PARTNER） (CN)
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