Title:
PROTECTIVE CIRCUIT AND DISPLAY DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/093482
Kind Code:
A1
Abstract:
A protective circuit (301) and a display drive device. The protective circuit (301) comprises: when an electrical overstress problem occurs in a logic signal, the voltage of an output end of a controlled switch circuit (100) is greater than a first preset voltage, so that a voltage threshold circuit (101) is turned on, and the controlled switch circuit (100) turns off an input end and the output end thereof, thereby preventing electrical overstress from affecting a driver chip (300) and causing damage to the driver chip (300). Moreover, the voltage potential of a controlled end of the controlled switch circuit (100) is clamped by means of a voltage clamp circuit (102) to stabilize the operating characteristics of the controlled switch circuit (100).
Inventors:
HUANG XIAOYU (CN)
Application Number:
PCT/CN2018/118011
Publication Date:
May 14, 2020
Filing Date:
November 28, 2018
Export Citation:
Assignee:
HKC CORP LTD (CN)
International Classes:
H02H3/20; G09G3/36; H02H9/00
Foreign References:
| CN107705742A | 2018-02-16 | |||
| CN207664618U | 2018-07-27 | |||
| CN104218529A | 2014-12-17 | |||
| CN109166557A | 2019-01-08 | |||
| US3931546A | 1976-01-06 | |||
| JP2006067187A | 2006-03-09 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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