Inspection apparatus for liquid crystal display panels

• US 20070154294A1
• Filed: 06/30/2006
• Published: 07/05/2007
• Est. Priority Date: 12/29/2005
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Shim, Chang Bo, Kim, Bum Soo, Jong, Jae Min
• Granted Patent: US 7,777,828 B2
• Time in Patent Office: Days
• US Class Current: 414/411
• CPC Class Codes: G02F 1/1303 Apparatus specially adapted to the manufacture of LCDs
• CPC Class Codes: G02F 1/1309 Repairing; Testing
• CPC Class Codes: G02F 2203/69 Arrangements or methods for testing or calibrating a device

Abstract

Disclosed herein is an inspection apparatus for liquid crystal display panels, which can perform inspection for orientation abnormality of the liquid crystal display panels while maintaining a uniform temperature. The inspection apparatus comprises a heating chamber to heat a plurality of LCD panels received in a cassette, an inspection unit positioned near the heating chamber to receive the LCD panels heated by the heating chamber, and to inspect abnormality of each LCD panel, and a panel transferring part to withdraw each of the LCD panels from the cassette and supply each of the LCD panels to the inspection unit, and to withdraw each of the LCD panels from the inspection unit and supply each of the LCD panels to the cassette while moving between the cassette and the inspection unit.

Claims

1. An inspection apparatus for liquid crystal display panels, comprising:

a heating chamber to heat a plurality of LCD panels received in a cassette;

an inspection unit positioned near the heating chamber to receive the LCD panels heated by the heating chamber and to inspect abnormality of each LCD panel; and

a panel transferring part to withdraw each of the LCD panels from the cassette and supply each of the LCD panels to the inspection unit, and to withdraw each of the LCD panels from the inspection unit and supply each of the LCD panels to the cassette while moving between the cassette and the inspection unit.

2. The inspection apparatus according to claim 1, wherein the heating chamber comprises a recess formed at a lower portion of a front side thereof such that the inspection unit is placed at the lower portion of the front side thereof, and a panel entrance formed on an upper surface of the recess to supply the LCD panels to the inspection unit therethrough.

3. The inspection apparatus according to claim 2, wherein the panel entrance is provided with a door to selectively open or close the panel entrance.

4. The inspection apparatus according to claim 2, wherein the inspection unit has a panel inlet formed to face the panel entrance.

5. The inspection apparatus according to claim 1, wherein the heating chamber is formed at a lateral rear side with a cassette entrance to allow the cassette to be conveyed into and from the heating chamber therethrough.

6. The inspection apparatus according to claim 5, wherein the cassette entrance is provided with a door to selectively open or close the cassette entrance.

7. The inspection apparatus according to claim 5, wherein the heating chamber is further provided at a bottom surface of the lateral rear side with a conveying part to allow the cassette to be conveyed into and from the heating chamber along the bottom surface of the rear side through the cassette entrance.

8. The inspection apparatus according to claim 7, wherein the conveying part comprises a conveyor.

9. The inspection apparatus according to claim 7, further comprising:

a lift to raise the front side of the cassette so as to allow the cassette to be selectively slanted.

10. The inspection apparatus according to claim 7, wherein the conveying part is installed to convey the cassette at a slant into/from the heating chamber.

11. The inspection apparatus according to claim 1, wherein the heating chamber comprises a window to allow procedures of inspection within the heating chamber to be observed therethrough.

12. The inspection apparatus according to claim 11, wherein the window is formed on an upper surface of the front side of the heating chamber.

13. The inspection apparatus according to claim 1, wherein the panel transferring part comprises a hand member configured to selectively clamp each LCD panel and having an upper end exposed to an upper outside of the heating chamber, a forward and backward shifting member to move the hand member between the cassette and the inspection unit, and a lifting member having one end secured to the forward and backward shifting member, and the other end to lift or lower the hand member in upward and downward directions.

14. The inspection apparatus according to claim 13, wherein the hand member has a clamping portion formed at a lower distal end thereof to clamp a lower portion of the LCD panel.

15. The inspection apparatus according to claim 13, wherein the forward and backward shifting member comprises a first rail installed on an upper surface of the heating chamber in the forward and backward directions, and a first activating member having one end installed to move in the forward and backward directions while being supported by the first rail, and the other end secured to the lifting member.

16. The inspection apparatus according to claim 13, wherein the lifting member comprises a second rail installed in the upward and downward directions in the heating chamber, and a second activating member having one end installed to move in the upward and downward directions while being supported by the second rail, and the other end secured to the hand member.

17. The inspection apparatus according to claim 13, wherein the heating chamber has an opening formed on an upper surface thereof to allow the hand member to move therethrough, and a closing part to close the opening.

18. The inspection apparatus according to claim 17, wherein the closing part has a foldable curtain shape, and has both ends secured to an upper front side and an upper rear side of the heating chamber, respectively, and an inner surface surrounding a peripheral surface of the hand member.

19. The inspection apparatus according to claim 1, wherein the cassette, the inspection unit, and the panel transferring part are installed at predetermined angles, respectively.

20. The inspection apparatus according to claim 19, wherein the cassette, the inspection unit, and the panel transferring part are installed at the same angle.