Display panel inspection system and inspection method for the same

Patent metadata

Field	Value
Publication number	US-9897830-B2
Application number	US-201514895619-A
Country	US
Kind code	B2
Filing date	Sep 16, 2015
Priority date	Jul 1, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A display panel inspection system and an inspection method for the same are provided. The system includes multiple electrode signal lines located in a display region, each has a starting terminal and an end terminal, multiple fan-out traces connected with the multiple electrode signal lines, multiple electrode signal input terminals connected with the multiple fan-out traces, multiple test pads connected with the multiple electrode signal input terminals, each has an end terminal, a signal transmitter and a signal receiver, wherein the signal transmitter transmits a signal at the starting terminal the electrode signal line, and the signal receiver receives a signal from the end terminal of the electrode signal line or the test pad. Accordingly, an open or short can be detected at the fan-out traces to decrease a light line ratio in the module process to increase the product yield rate.

First claim

What is claimed is:

1. A display panel inspection system, comprising:
multiple electrode signal lines located in a display region of a display panel, each electrode signal line has a starting terminal and an end terminal;
multiple fan-out traces connected with the multiple electrode signal lines and fanned out outwardly;
multiple electrode signal input terminals connected with the multiple fan-out traces;
multiple test pads connected with the multiple electrode signal input terminals through multiple connection lines, wherein, each test pad has an end terminal;
a signal transmitter and a signal receiver, wherein the signal transmitter transmits a signal at the starting terminal of one of the multiple electrode signal lines, and the signal receiver receives the signal from the end terminal of the one of the multiple electrode signal lines and the end terminal of a corresponding one of the multiple test pads;
wherein, the multiple connection lines are fanned out outwardly such that a distance between adjacent connection lines is gradually increased; and
wherein, a width of each test pad is greater than a width of each connection line.

2. The display panel inspection system according to claim 1 , wherein,
the multiple electrode signal lines includes first electrode signal lines and second electrode signal lines located in the display region and arranged as a matrix;
the multiple fan-out traces includes first fan-out traces and second fan-out traces, wherein, the first fan-out traces are connected with the first electrode signal lines and fanned out outwardly, and the second fan-out traces are connected with the second electrode signal lines and fanned out outwardly;
the multiple electrode signal input terminals includes first electrode signal input terminals and second electrode signal input terminals, wherein, the first electrode signal input terminals are connected with the first fan-out traces, and the second electrode signal input terminals are connected with the second fan-out traces;
the multiple test pads includes first test pads and/or second test pads, wherein, the first test pads are connected with the first electrode signal input terminals, and the second test pads are connected with the second electrode signal input terminals;
wherein, the signal transmitter transmits a signal at the starting terminals of the first electrode signal lines and the second electrode signal lines, and the signal receiver receives the signal from the end terminals of the first electrode signal lines and the second electrode signal lines, and the end terminals of the first test pads and the second test pads.

3. The display panel inspection system according to claim 1 , wherein, each of the electrode signal lines is a bi-directional driving signal line, and is connected with two connection lines, each connection line is connected with a corresponding one of the multiple test pads, and a distance between the two connection lines is not less than 7 μm.

4. The display panel inspection system according to claim 1 , wherein, a length of each test pad is not less than 300 μm, a width of each test pad is not less than 30 μm, and a distance between two adjacent test pads is not less than 60 μm.

5. The display panel inspection system according to claim 4 , wherein, the test pad and the electrode signal input terminal are connected through a connection line.

6. The display panel inspection system according to claim 1 , wherein, the signal transmitter is an OST (Open or Short Test) machine signal transmitter, and the signal receiver an OST machine signal receiver.

7. The display panel inspection system according to claim 1 , wherein, the signal transmitter is electrically connected with the starting terminal of one of the multiple electrode signal lines and moving along the starting terminals of the multiple electrode signal lines; the signal receiver is electrically connected with the end terminal of the one of the multiple electrode signal lines or the end terminal of one of the multiple test pads, and moving along the end terminals of the multiple electrode signal lines or the end terminals of the multiple test pads.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Fu Yanfeng

Classifications

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G3/006

  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) · CPC title

• G02F1/1309 Primary

  Repairing; Testing · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G01R31/2825

  in household appliances or professional audio/video equipment (testing LAN's H04L43/50; testing TV systems H04N17/00; testing loudspeakers H04R29/00) · CPC title