Liquid crystal display having shielding conductor

• US 9,041,874 B2
• Filed: 07/17/2012
• Issued: 05/26/2015
• Est. Priority Date: 03/19/2012
• Status: Active Grant

• Current Assignee: TCL China Star Optoelectronics Technology Co. Ltd. (TCL Technology Group Corp.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Chang, Jong Woong
• Primary Examiner(s): CHEN, WEN YING PATTY
• Application Number:
  US13/551,372
• Publication Number:
  US 20130242215A1
• Time in Patent Office: 1,043 Days
• Field of Search: 349/40
• US Class Current: 349/40
• CPC Class Codes: G02F 1/133388 with constructional differences between the display region and the peripheral region
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/136204 Arrangements to prevent high voltage or static electricity failures
• CPC Class Codes: G02F 1/136218 Shield electrodes

Abstract

Provided is a liquid crystal display including, on an insulation substrate having a polygonal display area and a peripheral area surrounding the display area a first signal line, a second signal line crossing the first signal line, a plurality of switching elements connected to the first signal line and the second signal line and disposed in the display area, a plurality of pixel electrodes each connected to the switching element and disposed in the display area, and a shielding conductor disposed in the peripheral area and extending along at least one side of the polygonal display area.

Claims

1. A display device, comprising:

a first insulation substrate comprising a display area and a peripheral area outside the display area;

a plurality of first signal lines disposed on the first insulation substrate;

a plurality of second signal lines disposed on the first insulation substrate and crossing the first signal lines;

a plurality of switching elements connected to the first signal lines and the second signal lines and disposed in the display area;

a plurality of pixel electrodes disposed in the display area, wherein each pixel electrode is connected to a switching element;

a medium electrode disposed in the display area, wherein the medium electrode and the pixel electrodes are configured to form an electric field to drive liquid crystals; and

a shielding conductor disposed in the peripheral area and extending along at least one side of the display area,

wherein the shielding conductor is disposed on the same layer as the medium electrode and the medium electrode extends such that it is directly and electrically connected to the shielding conductor.

2. The display device of claim 1, further comprising:

a shorting bar disposed in the peripheral area and electrically connected to the shielding conductor.

3. The display device of claim 2, wherein:

the shielding conductor forms a loop surrounding the display area such that the shorting bar is disposed on all sides of the display area.

4. The display device of claim 1, further comprising:

a second substrate facing the first substrate and a black matrix disposed on the second substrate,

wherein the shielding conductor overlaps a portion of the black matrix disposed in the peripheral area.

5. A display device, comprising:

a first insulation substrate comprising a display area and a peripheral area outside the display area;

a plurality of first signal lines disposed on the first insulation substrate;

a plurality of second signal lines disposed on the first insulation substrate and crossing the first signal lines;

a plurality of switching elements connected to the first signal lines and the second signal lines and disposed in the display area;

a plurality of pixel electrodes disposed in the display area, wherein each pixel electrode is connected to a switching element;

a shielding conductor disposed in the peripheral area and extending along at least one side of the display area; and

first and second shorting bars disposed in the peripheral area and electrically connected to the shielding conductor,

wherein;

the first shorting bar is disposed on the same layer as the first signal lines and is parallel to the first signal lines; and

the second shorting bar is disposed on the same layer as the second signal lines and is parallel to the second signal lines.

6. The display device of claim 5, wherein:

the shielding conductor and the medium electrode are disposed on different layers; and

the shielding conductor and the medium electrode are connected to each other through a connecting member.

7. The display device of claim 5, further comprising:

a medium electrode disposed in the display area, wherein the medium electrode and the pixel electrodes are configured to form an electric field to drive the liquid crystals,

wherein the first and second shorting bars and the shielding conductor are electrically connected to the medium electrode.

8. The display device of claim 7, wherein the first and second shorting bars, the shielding conductor, and the medium electrode are disposed on different layers and are connected to each other through a connecting member.

9. The display device of claim 5, further comprising:

a first driving circuit disposed in the peripheral area and configured to apply a signal voltage to the first signal lines; and

a second driving circuit disposed in the peripheral area and configured to apply a signal voltage to the second signal lines;

wherein the shielding conductor is configured to receive a voltage through at least one dummy pin of the first driving circuit and the second driving circuit.

10. The display device of claim 9, further comprising:

a medium electrode disposed in the display area, wherein the medium electrode and the pixel electrodes are configured to form an electric field to drive the liquid crystals; and

a connection portion partially connecting the shielding conductor and the medium electrode.

11. The display device of claim 9, further comprising:

a medium electrode disposed in the display area, wherein the medium electrode and the pixel electrodes are configured to form an electric field to drive the liquid crystals, and wherein the medium electrode is electrically separated from the shielding conductor.

12. The display device of claim 11, wherein:

the shielding conductor forms a loop surrounding the display area.

13. A display device, comprising:

a first insulation substrate comprising a display area and a peripheral area outside the display area;

a plurality of first signal lines disposed on the first insulation substrate;

a plurality of second signal lines disposed on the first insulation substrate and crossing the first signal lines;

a plurality of switching elements connected to the first signal lines and the second signal lines and disposed in the display area;

a plurality of pixel electrodes disposed in the display area, wherein each pixel electrode is connected to a switching element;

a first driving circuit disposed in the peripheral area and configured to apply a signal voltage to the first signal lines;

a second driving circuit disposed in the peripheral area and configured to apply a signal voltage to the second signal lines;

a plurality of shielding conductors separated from each other, disposed in the peripheral area, extending along sides of the display area, and configured to receive voltages through a plurality of dummy pins of the first driving circuit and the second driving circuit; and

a medium electrode disposed in the display area,

wherein;

the medium electrode and the pixel electrodes are configured to form an electric field to drive the liquid crystals;

the medium electrode is electrically separated from the shielding conductor; and

,

at least one of the shielding conductors is connected to a dummy pin of the first driving circuit, and at least another one of the shielding conductors is connected to a dummy pin of the second driving circuit.

14. The display device of claim 13, wherein the shielding conductors surround the display area.

15. The display device of claim 13, wherein:

the plurality of shielding conductors comprise first, second, third, and fourth shielding conductors separated from each other;

the first and the second shielding conductors are connected to a dummy pin of the first driving circuit; and

the third and the fourth shielding conductors are connected to a dummy pin of the second driving circuit.

16. The display device of claim 15, wherein:

the first shielding conductor and the second shielding conductor are connected to different dummy pins of the first driving circuit, and

the third shielding conductor and the fourth shielding conductor are connected to different dummy pins of the second driving circuit.

17. The display device of claim 16, wherein:

the display area is quadrangle, and the first, second, third, and fourth shielding conductors are respectively disposed on the first, second, third and fourth sides of the display area.