Liquid crystal display

• US 10,534,206 B2
• Filed: 06/02/2015
• Issued: 01/14/2020
• Est. Priority Date: 01/06/2015
• 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: Jeon, Young Jae, Kwak, Yun Hee, Kim, Hyoung-joon, Choi, Jae Ho, Kim, Kyung Hyun, Chang, Jong Woong
• Primary Examiner(s): Patel, Paresh
• Application Number:
  US14/728,710
• Publication Number:
  US 20160195740A1
• Time in Patent Office: 1,687 Days
• Field of Search: None
• CPC Class Codes: G02F 1/1309 Repairing; Testing
• CPC Class Codes: G02F 1/133388 with constructional differences between the display region and the peripheral region
• CPC Class Codes: G02F 1/136254 Checking; Testing

Abstract

A liquid crystal display, including: a liquid crystal panel; and a visual inspection unit positioned in an outer region of the liquid crystal panel and transferring a test signal to the liquid crystal panel, in which the visual inspection unit includes: a test pad to which a test signal is applied; a first test line connected to the test pad; and a second test line connected to the test pad through a bridge line.

Claims

1. A liquid crystal display, comprising:

a display area including a plurality of pixels; and

a visual inspection unit positioned in an outer region of the display area and configured to output a test screen to the plurality of pixels,

wherein;

the visual inspection unit includes;

a first test line;

a second test line extending parallel to the first test line;

a test pad, to which a test signal is applied, disposed between the first test line and the second test line, directly connected to the first test line, and extending from the first test line in a direction toward the second test line;

an insulating layer on the test pad and the second test line; and

a bridge line on the insulating layer and overlapping the test pad and the second test line without overlapping the first test line;

the insulating layer includes a first connection hole overlapping the test pad and a second connection hole overlapping the second test line;

the bridge line is connected to the test pad through the first connection hole and connected to the second test line through the second connection hole; and

a common electrode voltage is applied to the test pad as the test signal.

2. The liquid crystal display of claim 1, wherein:

the visual inspection unit further includes a plurality of test pads to which a plurality of test signals are applied and a plurality of test lines connected to respective ones of the plurality of test pads.

3. The liquid crystal display of claim 1, wherein:

the first test line and the second test line transfer the same signal.

6. The liquid crystal display of claim 1, wherein:

the bridge line is made of indium tin oxide (ITO) or indium zinc oxide (IZO).

7. The liquid crystal display of claim 1, wherein:

the common electrode voltage applied to the test pad is transferred through the first test line to the plurality of pixels; and

the common electrode voltage applied to the test pad is transferred through the bridge line and the second test line to the plurality of pixels.

4. A liquid crystal display, comprising:

a display area including a plurality of pixels; and

a visual inspection unit positioned in an outer region of the display area and configured to output a test screen to the plurality of pixels,

wherein;

the visual inspection unit includes;

a first test line;

a second test line extending parallel to the first test line;

a test pad, to which a test signal is applied, disposed between the first test line and the second test line, directly connected to the second test line, and extending from the second test line in a direction toward the first test line;

an insulating layer on the test pad and the first test line; and

a bridge line on the insulating layer and overlapping the test pad and the first test line without overlapping the second test line;

the insulating layer includes a first connection hole overlapping the first test line and a second connection hole overlapping the test pad;

the bridge line is connected to the first test line through the first connection hole and connected to the test pad through the second connection hole; and

a storage electrode voltage is applied to the test pad as the test signal.

5. The liquid crystal display of claim 4, wherein:

the storage electrode voltage applied to the test pad is transferred through the bridge line and the first test line to the plurality of pixels; and

the storage electrode voltage applied to the test pad is transferred through the second test line to the plurality of pixels.