Route protection circuit and liquid crystal display

Patent metadata

Field	Value
Publication number	US-2017263166-A1
Application number	US-201514908113-A
Country	US
Kind code	A1
Filing date	Nov 26, 2015
Priority date	Oct 13, 2015
Publication date	Sep 14, 2017
Grant date	—

Abstract

The circuit of the present invention comprises a detection module and a feedback module, wherein an output end of a power supply management module is coupled to one end of a voltage level shift module, and the other end of the voltage level shift module is coupled to a first end of the detection module, and a second end of the detection module is coupled to a WOA route module or a GOA route module, and a third end of the detection is coupled to one end of the feedback module, and the other end of the feedback module is coupled to an enable end of the power supply management module, and the detection module detects whether the WOA route module or the GOA route module is short, and feeds back a short signal; the feedback module receives the short signal, and sends a disable signal to the enable end.

First claim

What is claimed is:

1 . A route protection circuit, comprising a detection module and a feedback module, wherein an output end of a power supply management module is coupled to one end of a voltage level shift module, and the other end of the voltage level shift module is coupled to a first end of the detection module, and a second end of the detection module is coupled to a WOA route module or a GOA route module, and a third end of the detection is coupled to one end of the feedback module, and the other end of the feedback module is coupled to an enable end of the power supply management module, and
the detection module comprises an optocoupler and a current-limiting resistance, wherein a first input end of the optocoupler is employed to couple to another end of the voltage level shift module, and a second input end of the optocoupler is employed to couple to the WOA route module or the GOA route module, and a first output end of the optocoupler is coupled to one end of the current-limiting resistance, and the other end of the current-limiting resistance is employed to couple to a power supply, and a second output end of the optocoupler is employed to be grounded; the feedback module comprises a voltage comparator and a switch, and a negative end of the voltage comparator is coupled to a common end of the optocoupler and the current-limiting resistance, and a positive end of the voltage comparator is employed to input a reference voltage, and an output end of the voltage comparator is coupled to a first end of the switch, and a second end of the switch is coupled to the enable end of the power supply management module, and a third end of the switch is grounded.

2 . The circuit according to claim 1 , wherein the resistance value of the current-limiting resistance is 10 kilohm.

3 . The circuit according to claim 1 , wherein the switch is a P channel enhancement mode triode.

4 . A route protection circuit, comprising a detection module and a feedback module, wherein an output end of a power supply management module is coupled to one end of a voltage level shift module, and the other end of the voltage level shift module is coupled to a first end of the detection module, and a second end of the detection module is coupled to a WOA route module or a GOA route module, and a third end of the detection is coupled to one end of the feedback module, and the other end of the feedback module is coupled to an enable end of the power supply management module, and
the detection module is employed to detect whether the WOA route module or the GOA route module is short, and feeds back a short signal to the feedback module as the WOA route module or the GOA route module is short; the feedback module is employed to receive the short signal fed back by the detection module, and sends a disable signal to the enable end of the power supply management module to make the power supply management module be disabled.

5 . The circuit according to claim 4 , wherein the detection module comprises an optocoupler and a current-limiting resistance, wherein a first input end of the optocoupler is employed to couple to another end of the voltage level shift module, and a second input end of the optocoupler is employed to couple to the WOA route module or the GOA route module, and a first output end of the optocoupler is coupled to one end of the current-limiting resistance, and the other end of the current-limiting resistance is employed to couple to a power supply, and a second output end of the optocoupler is employed to be grounded.

6 . The circuit according to claim 4 , wherein the feedback module comprises a voltage comparator and a switch, and a negative end of the voltage comparator is coupled to a common end of the optocoupler and the current-limiting resistance, and a positive end of the voltage comparator is employed to input a reference voltage, and an output end of the voltage comparator is coupled to a first end of the switch, and a second end of the switch is coupled to the enable end of the power supply management module, and a third end of the switch is grounded.

7 . The circuit according to claim 6 , wherein the resistance value of the current-limiting resistance is 10 kilohm.

8 . The circuit according to claim 4 , wherein the switch is a P channel enhancement mode triode.

9 . A liquid crystal display, comprising a liquid crystal display panel and a bottom plate, and the liquid crystal display panel comprises a route protection circuit, and the route protection circuit comprises a detection module and a feedback module, wherein an output end of a power supply management module is coupled to one end of a voltage level shift module, and the other end of the voltage level shift module is coupled to a first end of the detection module, and a second end of the detection module is coupled to a WOA route module or a GOA route module, and a third end of the detection is coupled to one end of the feedback module, and the other end of the feedback module is coupled to an enable end of the power supply management module, and
the detection module is employed to detect whether the WOA route module or the GOA route module is short, and feeds back a short signal to the feedback module as the WOA route module or the GOA route module is short; the feedback module is employed to receive the short signal fed back by the detection module, and sends a disable signal to the enable end of the power supply management module to make the power supply management module be disabled.

10 . The liquid crystal display according to claim 9 , wherein the detection module comprises an optocoupler and a current-limiting resistance, wherein a first input end of the optocoupler is employed to couple to another end of the voltage level shift module, and a second input end of the optocoupler is employed to couple to the WOA route module or the GOA route module, and a first output end of the optocoupler is coupled to one end of the current-limiting resistance, and the other end of the current-limiting resistance is employed to couple to a power supply, and a second output end of the optocoupler is employed to be grounded.

11 . The liquid crystal display according to claim 9 , wherein the feedback module comprises a voltage comparator and a switch, and a negative end of the voltage comparator is coupled to a common end of the optocoupler and the current-limiting resistance, and a positive end of the voltage comparator is employed to input a reference voltage, and an output end of the voltage comparator is coupled to a first end of the switch, and a second end of the switch is coupled to the enable end of the power supply management module, and a third end of the switch is grounded.

12 . The liquid crystal display according to claim 11 , wherein the resistance value of the current-limiting resistance is 10 kilohm.

13 . The liquid crystal display according to claim 9 , wherein the switch is a P channel enhancement mode triode.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Chen Xinhong

Classifications

• G09G3/36 Primary

  using liquid crystals · CPC title

• H02H3/16

  responsive to fault current to earth, frame or mass (with balanced or differential arrangement H02H3/26 {; monitoring earth connection H02H5/105}) · CPC title

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G09G2300/0408

  Integration of the drivers onto the display substrate · CPC title

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title