Panel detection circuit and display panel

Patent metadata

Field	Value
Publication number	US-9741275-B2
Application number	US-201414416771-A
Country	US
Kind code	B2
Filing date	Jul 16, 2014
Priority date	Jun 25, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

The present disclosure relates to a panel detection circuit and a display panel. The panel detection circuit comprises a source detection unit comprising a source testing line and several source switching units, a gate detection unit comprising a gate control line, a gate testing line and several gate switching unit, wherein the source switching unit and the gate switching unit each comprise at least two switching elements to keep the source switching unit and the gate switching unit disenabled after the panel detection is completed.

First claim

The invention claimed is:

1. A panel detection circuit, comprising:
a source detection unit, comprising only one source testing line and several source switching units, one end of each source switching unit being connected to the source testing line and the other end thereof being connected to a data line of a display panel, and
a gate detection unit, comprising a gate control line, a gate testing line and several gate switching units, a first end of each gate switching unit being connected to the gate control line, a second end thereof being connected to the gate testing line, and a third end thereof being connected to a scan line of the display panel,
wherein the source switching unit and the gate switching unit each comprise at least two switching elements to keep the source switching unit and the gate switching unit disenabled after the panel detection is completed;
wherein the source switching unit comprises a first transistor and a second transistor, the gate and source of the first transistor being connected to the source testing line, the gate and source of the second transistor being connected to the drain of the first transistor, and the drain of the second transistor being connected to a data line of the display panel.

2. The panel detection circuit according to claim 1 , wherein the gate switching unit comprises a third transistor and a fourth transistor, the gate of the third transistor being connected to the gate control line and the source thereof being connected to the gate testing line, the gate of the fourth transistor being connected to the gate control line and the source thereof being connected to the drain of the third transistor, and the drain of the fourth transistor being connected to a scan line of the display panel.

3. The panel detection circuit according to claim 2 , wherein the source testing line is connected to a first low-potential driver unit, so that the source switching unit is turned off after the detection of the panel is completed.

4. The panel detection circuit according to claim 2 , wherein the gate control line is connected to a second low-potential driver unit, so that the gate switching unit is turned off after the detection of the panel is completed.

5. The panel detection circuit according to claim 2 , wherein the transistors are TFT thin film field-effect transistors or MOSFET transistors.

6. A display panel, comprising:
a panel detection circuit comprising a source detection unit and a gate detection unit, the source detection unit comprising only one source testing line and several source switching units, one end of each source switching unit being connected to the source testing line and the other end thereof being connected to a data line of a display panel, the gate detection unit comprising a gate control line, a gate testing line and several gate switching units, a first end of each gate switching unit being connected to the gate control line, a second end thereof being connected to the gate testing line, and a third end thereof being connected to a scan line of the display panel, wherein the source switching units and the gate switching units each comprise at least two switching elements to keep the source switching units and the gate switching units disenabled after the panel detection is completed,
a plurality of scan lines and data lines arranged in a staggered manner,
a display unit array connected to the scan lines and data lines,
a gate driver circuit for providing scanning pulse signals to the scan lines, and
a source driver circuit for providing data signals to the data lines;
wherein the source switching unit comprises a first transistor and a second transistor, the gate and source of the first transistor being connected to the source testing line, the gate and source of the second transistor being connected to the drain of the first transistor, and the drain of the second transistor being connected to a data line of the display panel.

7. The display panel according to claim 6 , wherein the gate switching unit comprises a third transistor and a fourth transistor, the gate of the third transistor being connected to the gate control line and the source thereof being connected to the gate testing line, the gate of the fourth transistor being connected to the gate control line and the source thereof being connected to the drain of the third transistor, and the drain of the fourth transistor being connected to a scan line of the display panel.

8. The display panel according to claim 7 , wherein the source testing line is connected to a first low-potential driver unit, so that the source switching unit is turned off after the detection of the panel is completed.

9. The display panel according to claim 7 , wherein the, gate control ling is connected to a second low-potential driver unit, so that the gate switching unit is turned off after the detection of the panel is completed.

10. The display panel according to claim 7 , wherein the transistors are TFT thin film field-effect transistors or MOSFET transistors.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Lv Qibiao

Classifications

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title

• G09G3/3677

  suitable for active matrices only · CPC title

• G09G3/3688

  suitable for active matrices only · 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

• G01R19/28

  adapted for measuring in circuits having distributed constants · CPC title