Title:
JUMP EDGE DETECTION MODULE, BLEED CONTROL CIRCUIT, METHOD AND LED DRIVE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/241124
Kind Code:
A1
Abstract:
Provided in the present invention are a jump edge detection module, a bleed control circuit, a method and an LED drive system. The bleed control circuit comprises: a current control module which controls a bleed current, and when a current flowing through an LED constant-current control circuit is greater than a first preset value, outputs a first bleed turn-off signal; a bleed voltage amplitude measurement module for measuring an amplitude of a bleed voltage; a jump edge detection module for detecting a jump edge of the bleed voltage; a first logic module, which outputs a second bleed turn-off signal when the duration of the bleed voltage amplitude being greater than the second preset value exceeds a set value, and which resets the second bleed turn-off signal when the bleed voltage jumps; and a second logic module which outputs a turn-off control signal when the first or second bleed turn-off signal is valid. The present invention can simplify the system design, reduce the chip area, and reduce the external capacitance, and has strong anti-interference capability.
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Inventors:
LIU JUN (CN)
LI GUOCHENG (CN)
WU QUANQING (CN)
LI GUOCHENG (CN)
WU QUANQING (CN)
Application Number:
PCT/CN2023/080467
Publication Date:
December 21, 2023
Filing Date:
March 09, 2023
Export Citation:
Assignee:
CRM ICBG WUXI CO LTD (CN)
International Classes:
H02H9/02
Foreign References:
| JP2005285601A | 2005-10-13 | |||
| CN110109501A | 2019-08-09 | |||
| CN110198580A | 2019-09-03 | |||
| CN106912144A | 2017-06-30 |
Attorney, Agent or Firm:
J.Z.M.C. PATENT AND TRADEMARK LAW OFFICE (GENERAL PARTNERSHIP) (CN)
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