Display panel and testing method thereof

• US 8,692,558 B2
• Filed: 07/24/2011
• Issued: 04/08/2014
• Est. Priority Date: 04/14/2011
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Shen, Chung-Ming
• Primary Examiner(s): Nguyen, Vincent Q
• Application Number:
  US13/189,557
• Publication Number:
  US 20120262184A1
• Time in Patent Office: 989 Days
• Field of Search: 324/537, 324/503, 324/760.02, 324/522
• US Class Current: 324/537
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2310/02 Addressing, scanning or driving the display screen or processing steps related thereto
• CPC Class Codes: G09G 3/006 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

Abstract

A display panel and a testing method of the display panel are provided. The display panel has a display region and a non-display region and includes a first substrate, a second substrate, and a display medium. The display panel further includes scan lines, data lines, pixel units, at least one testing line, and at least one testing pad. The scan lines and the data lines are located on the first substrate within the display region. The pixel units are located on the first substrate within the display region. Each pixel unit electrically connects one of the scan lines and one of the data lines. The testing line is located on the first substrate within the non-display region, crosses over the scan lines, and is insulated from the scan lines. The testing pad is located on the first substrate within the non-display region and electrically connected to the testing line.

Claims

1. A display panel having a display region and a non-display region, the display panel comprising:

a first substrate, a second substrate, and a display medium located between the first substrate and the second substrate;

a plurality of data lines and a plurality of scan lines, the scan lines and the data lines being located on the first substrate within the display region;

a plurality of pixel units located on the first substrate within the display region, each of the pixel units being electrically connected to one of the scan lines and one of the data lines;

at least one testing line located on the first substrate within the non-display region, the scan lines crossing over the at least one testing line and being electrically insulated from the at least one testing line;

at least one testing pad located on the first substrate within the non-display region, the at least one testing pad being electrically connected to the at least one testing line;

a common voltage line located on the first substrate within the non-display region and disposed adjacent to the at least one testing line; and

a common voltage pad located on the first substrate within the non-display region and electrically connected to the common voltage line,

wherein the at least one testing line is electrically connected to the common voltage line.

2. The display panel as claimed in claim 1, wherein the at least one testing line comprises a first portion and a second portion, the first portion of the at least one testing line crosses over the scan lines, is electrically insulated from the scan lines, and is electrically connected to the at least one testing pad, and the second portion of the at least one testing line crosses over the data lines and is electrically insulated from the data lines.

3. The display panel as claimed in claim 2, further comprising:

a common voltage line located on the first substrate within the non-display region and disposed adjacent to the at least one testing line; and

a common voltage pad located on the first substrate within the non-display region and electrically connected to the common voltage line.

4. The display panel as claimed in claim 1, wherein the at least one testing pad is located on the first substrate and is not covered by the second substrate.

5. The display panel as claimed in claim 1, further comprising at least one driving device located on the first substrate within the non-display region, the scan lines and the data lines being electrically connected to the at least one driving device.

6. The display panel as claimed in claim 1, wherein no switch devices are configured between the at least testing line and the scan lines.

7. The display panel as claimed in claim 1, further comprising a bridge line disposed between the at least one testing line and the common voltage line, wherein the bridge line connects the at least one testing line and the common voltage line.