IP Library Granted Patent US 7,027,123
Granted Patent B2
US 7,027,123 · App. 10/669,377 · Granted Apr 11, 2006

Method of fabricating liquid crystal display device

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Quick Facts
Patent No.
US 7,027,123
App. No.
10/669,377
Granted
Apr 11, 2006
Kind
B2
Abstract

A method of fabricating a liquid crystal display device includes forming a first testing terminal along a side surface of a first substrate, forming a second testing terminal along a side surface of a second substrate, attaching the first and second substrates together to expose the first and second testing terminals, and conducting a lighting test using the first and second testing terminals.

Claims (40)

1. A method of fabricating a liquid crystal display device, comprising:

forming a first testing terminal along a side surface of a first substrate;

forming a second testing terminal along a side surface of a second substrate;

attaching the first and second substrates together to expose the first and second testing terminals;

conducting a lighting test using the first and second testing terminals; and

forming a plurality of individual liquid crystal panels by cutting the first and second substrates after conducting the lighting test.

2. The method according to claim 1 , further comprising a step of conducting an eye test for detecting defects of the liquid crystal display device by disposing a first polarizer at a rear surface of one of the first and second substrates and a second polarizer at a rear surface of another of the first and second substrates, and rotating one of the first and second polarizers.

3. The method according to claim 1 , further comprising a step of dispensing liquid crystal on one of the first and second substrates.

4. The method according to claim 1 , wherein preparing the first substrate comprises:

providing a transparent substrate;

forming a color filter on the transparent substrate; and

forming a common electrode on the color filter.

5. The method according to claim 4 , wherein the steps of forming a common electrode and forming a first testing terminal are performed simultaneously.

6. The method according to claim 4 , wherein the common electrode is formed to be electrically connected to the first testing terminal.

7. The method according to claim 1 , wherein providing the second substrate comprises:

providing a transparent substrate on which pixel areas are defined;

forming gate lines and a gate shorting bar for interconnecting the gate lines on the transparent substrate;

forming data lines insulated from and crossing the gate lines and a data shorting bar for interconnecting the data lines; and

forming a pixel electrode on the pixel area.

8. The method according to claim 7 , wherein the step of forming a gate shorting bar includes forming a gate testing terminal connecting the gate shorting bar.

9. The method according to claim 8 , wherein the gate testing terminal is connected to one of the first and second testing terminals.

10. The method according to claim 7 , wherein the step of forming a data shorting bar includes forming a data testing terminal connecting the data shorting bar.

11. The method according to claim 8 , wherein the data testing terminal is connected to one of the first and second testing terminals.

12. A method of fabricating a liquid crystal display (LCD) device, comprising:

providing a first substrate upon which a plurality of color filter substrates and a first testing terminal are formed;

providing a second substrate upon which a plurality of thin film transistor array substrates corresponding to the color filter substrates are formed, the second substrate includes a second testing terminal;

applying a sealing material along outer portions of the color filter substrates on the first substrate;

dispensing liquid crystal onto the second substrate;

attaching the first and second substrates together so that the first and second testing terminals are exposed;

conducting a first defect test of the first and second substrates by supplying voltages to the first and second testing terminals; and

dividing the attached first and second substrates into a plurality of individual liquid crystal panels.

13. The method according to claim 12 , further comprising a step of conducting a second defect test by disposing a first polarizer at a rear surface of one of the first and second substrates and a second polarizer at a rear surface of another of the first and second substrates, and rotating one of the first and second polarizers.

14. The method according to claim 12 , wherein the first substrate includes a color filter and a common electrode on the color filter.

15. The method according to claim 14 , wherein the common electrode and the first testing terminal are formed simultaneously.

16. The method according to claim 14 , wherein the common electrode is eletrically connected to the first testing terminal.

17. The method according to claim 12 , wherein the second substrate includes a gate shorting bar for interconnecting a plurality of gate lines, and a data shorting bar for interconnecting a plurality of data lines.

18. The method according to claim 17 , wherein the gate shorting bar includes a gate testing terminal connecting the gate shorting bar.

19. The method according to claim 18 , wherein the gate testing terminal is connected to one of the first and second testing terminals.

20. The method according to claim 17 , wherein the data shorting bar includes a data testing terminal connecting the data shorting bar.

21. The method according to claim 20 , wherein the data testing terminal is connected to one of the first and second testing terminals.

Assignments (2)
CHANGE OF NAME Recorded Oct 27, 2008
From: LG.PHILIPS LCD CO., LTD.
To: LG DISPLAY CO., LTD.
Reel/Frame 021763/0212 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 25, 2003
From: CHAE, KYUNG-SU; BYUN, YONG-SANG
To: LG.PHILIPS LCD CO., LTD.
Reel/Frame 014548/0414 →