Line detecting apparatus and method for array substrate

• US 9,891,264 B2
• Filed: 11/01/2013
• Issued: 02/13/2018
• Est. Priority Date: 06/20/2013
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Wang, Honghui
• Primary Examiner(s): Koval, Melissa
• Assistant Examiner(s): Monsur, Nasima
• Application Number:
  US14/359,222
• Publication Number:
  US 20140375347A1
• Time in Patent Office: 1,565 Days
• Field of Search: 32476002, 3247503, 32476001, 324686, 324691, 324713, 32476203, 324 7611, 324116, 324115, 324121 R, 345174, 345173, 345104, 345211, 345 87, 236 51, 374 E7018
• CPC Class Codes: G01R 31/2607 Circuits therefor G01R31/2642 takes precedence
• 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 line detecting apparatus and a line detecting method for an array substrate relates to the field of line detecting technology. The detecting method comprises: arranging an input terminal sensor (30) at a signal input terminal of a wire to be detected, arranging one output terminal sensor (41, 42, 43) at a signal output terminal of the wire to be detected, and arranging other output terminal sensor (41, 42, 43) at a signal output terminal of another wire adjacent to the wire to be detected; measuring an output voltage of the wire to be detected by a voltage detector; and determining the line conduction condition of the wire to be detected according to the output voltage as measured. When the sensors perform line scan, the coordinate of the specific location where the short-circuit or open-circuit occurs can be found directly without performing scan by PDS or AOI, thus simplifying the technical processes, shortening the time for detecting, and saving the production cost.

Claims

1. A line detecting apparatus for an array substrate, comprising:

a voltage input terminal;

an input terminal sensor connected to the voltage input terminal;

an equivalent resistor and a voltage detector connected in parallel;

at least two output terminal sensors

wherein the input terminal sensor is arranged at a signal input terminal of a wire to be detected, a first output terminal sensor in the at least two output terminal sensors is arranged at a signal output terminal of the wire to be detected, each of other output terminal sensors in the at least two output terminal sensors is arranged at a signal output terminal of another wire adjacent to the wire to be detected respectively, a signal input terminal of the wire adjacent to the wire to be detected is floated,

wherein the equivalent resistor and the voltage detector connected in parallel are connected to one of said at least two output terminal sensors, and the voltage detector is configured to read a voltage at the signal output terminal of the wire to be detected when being connected to the signal output terminal of the wire to be detected, and to read a voltage at the signal output terminal of the wire adjacent to the wire to be detected when being connected to the signal output terminal of the wire adjacent to the wire to be detected.

2. The line detecting apparatus for array substrate of claim 1, wherein the wire to be detected is a gate line, and the at least two output terminal sensors comprise the first output terminal sensor, a second output terminal sensor and a third output terminal sensor, the first output terminal sensor is arranged at a signal output terminal of the gate line, the second output terminal sensor and the third output terminal sensor are arranged respectively at signal output terminals of two common electrodes adjacent to the gate line.

3. The line detecting apparatus for array substrate of claim 1, wherein the wire to be detected is a data line, and the at least two output terminal sensors comprise a first output terminal sensor and a second output terminal sensor, the first output terminal sensor is arranged at a signal output terminal of the data line, and the second output terminal sensor is arranged at a signal output terminal of another data line adjacent to the data line.

4. A detecting method based on the line detecting apparatus for array substrate of claim 1, comprising:

arranging the input terminal sensor at a signal input terminal of a wire to be detected, arranging a first output terminal sensor of the at least two output terminal sensors at a signal output terminal of the wire to be detected, and arranging each of the other output terminal sensors at the signal output terminal of another wire adjacent to the wire to be detected;

measuring an output voltage of the wire to be detected by the voltage detector;

determining a line conduction condition of the wire to be detected by comparing the voltage as measured to a normal output voltage.

5. The detecting method of claim 4, wherein the wire to be detected is a gate line, and the at least two output terminal sensors comprise the first output terminal sensor, a second output terminal sensor and a third output terminal sensor, the first output terminal sensor is arranged at the signal output terminal of the gate line, the second output terminal sensor and the third output terminal sensor are arranged respectively at signal output terminals of two common electrodes adjacent to the gate line.

6. The detecting method of claim 4, wherein the wire to be detected is a data line, and the at least two output terminal sensors comprise the first output terminal sensor and a second output terminal sensor, the first output terminal sensor is arranged at the signal output terminal of the data line, and the second output terminal sensor is arranged at the signal output terminal of another data line adjacent to the data line.

7. The detecting method of claim 4, wherein it is determined that a short-circuit occurs on the wire to be detected as the wire to be detected has a signal output which is inconsistent with a normal value, and the distance between the position where the short-circuit occurs and the zero point of coordinate is determined according to the output voltage value of the wire to be detected measured by the voltage detector.

8. The detecting method of claim 4, wherein, it is determined that an open-circuit occurs on the wire to be detected as the wire to be detected has no signal output, the input terminal sensor is moved in the direction toward the output terminal of the wire to be detected until the output terminal sensor detects a signal.

9. The detecting method of claim 8, wherein, when the input terminal sensor is moved to a position where the output terminal sensor detects a signal, the distance from the position where the open-circuit occurs to the zero point of coordinate is determined according to the output voltage value of the wire to be detected measured by the voltage detector.

10. The detecting method of claim 4, wherein, after completing the determination of the line conduction condition of the wire to be detected according to the output voltage of the wire to be detected as measured, the detecting method comprises:

moving positions of all the output terminal sensors by one detecting unit in a direction perpendicular to the longitudinal direction of the wire to be detected so as to detect the line conduction condition of a next detecting unit.

11. The detecting method of claim 5, wherein, it is determined that a short-circuit occurs on the wire to be detected as the wire to be detected has a signal output which is inconsistent with a normal value, and the distance between the position where the short-circuit occurs and the zero point of coordinate is determined according to the output voltage value of the wire to be detected measured by the voltage detector.

12. The detecting method of claim 6, wherein it is determined that a short-circuit occurs on the wire to be detected as the wire to be detected has a signal output which is inconsistent with a normal value, and the distance between the position where the short-circuit occurs and the zero point of coordinate is determined according to the output voltage value of the wire to be detected measured by the voltage detector.

13. The detecting method of claim 5, wherein, it is determined that an open-circuit occurs on the wire to be detected as the wire to be detected has no signal output, and the input terminal sensor is moved in the direction toward the output terminal of the wire to be detected until the output terminal sensor detects a signal.

14. The detecting method of claim 6, wherein, it is determined that an open-circuit occurs on the wire to be detected as the wire to be detected has no signal output, and the input terminal sensor is moved in the direction toward the output terminal of the wire to be detected until the output terminal sensor detects a signal.

15. The detecting method of claim 11, wherein, when the input terminal sensor is moved to a position where the output terminal sensor detects a signal, the distance from the position where the open-circuit occurs to the zero point of coordinate is determined according to the output voltage value of the wire to be detected measured by the voltage detector.

16. The detecting method of claim 12, wherein, when the input terminal sensor is moved to a position where the output terminal sensor detects a signal, the distance from the position where the open-circuit occurs to the zero point of coordinate is determined according to the output voltage value of the wire to be detected measured by the voltage detector.