IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0840415
(2004-05-07)
|
등록번호 |
US-7322490
(2008-01-29)
|
우선권정보 |
KR-10-2003-0029456(2003-05-09) |
발명자
/ 주소 |
- Ryu,Joung Ho
- Kwak,Soo Min
- Son,Hae Joon
- An,Man Ho
- Kim,Joon Young
- Ryu,Do Hyun
- Lee,Seung Soo
|
출원인 / 주소 |
|
대리인 / 주소 |
McKenna, Long & Aldridge LLP
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
38 |
초록
▼
A liquid crystal dispensing system includes a container to contain liquid crystal to be dispensed, a discharge pump to receive the liquid crystal from the container and to discharge the liquid crystal, a nozzle to dispense the liquid crystal discharged from the discharge pump onto a substrate, and a
A liquid crystal dispensing system includes a container to contain liquid crystal to be dispensed, a discharge pump to receive the liquid crystal from the container and to discharge the liquid crystal, a nozzle to dispense the liquid crystal discharged from the discharge pump onto a substrate, and a control unit to control a dispensing amount of liquid crystal discharged from the discharge pump and to compensate the dispensing amount when the dispensing amount of liquid crystal exceeds a limitation value.
대표청구항
▼
What is claimed is: 1. A method of manufacturing a liquid crystal display device comprising: providing first and second substrates; dispensing liquid crystal onto one of the first and second substrates using a liquid crystal dispensing system, the liquid crystal dispensing system including a contai
What is claimed is: 1. A method of manufacturing a liquid crystal display device comprising: providing first and second substrates; dispensing liquid crystal onto one of the first and second substrates using a liquid crystal dispensing system, the liquid crystal dispensing system including a container to contain liquid crystal to be dispensed; a discharge pump to receive the liquid crystal from the container and to discharge the liquid crystal; a nozzle to dispense the liquid crystal discharged from the discharge pump onto a substrate; and a control unit to control a dispensing amount of liquid crystal discharged from the discharge pump, the control unit compensating the dispensing amount when the dispensing amount of liquid crystal exceeds a first limitation value and the control unit stopping the dispensing the liquid crystal when the dispensing amount of liquid crystal exceeds a second limitation value; and joining together the first and second substrates. 2. The method of claim 1, wherein the discharge pump includes: a cylinder; a piston inserted into the cylinder and provided with a groove at a lower portion thereof to draw in and to discharge liquid crystal in accordance with rotational and up/down motion of the piston; a suction opening through which the liquid crystal is drawn in; and a discharge opening through which the liquid crystal is discharged. 3. The method of claim 1, wherein the liquid crystal dispensing system further include a liquid crystal capacity amount controlling member to control the discharge amount of liquid crystal by varying the fixation angle of the discharge pump. 4. The method of claim 1, wherein the liquid crystal dispensing system further include a first detecting unit installed near the second connecting tube to detect whether vapor is included in the liquid crystal discharged from the discharge pump. 5. The method of claim 4, wherein the liquid crystal dispensing system further include a second detecting unit installed near the nozzle to detect whether liquid crystal has collected on the surface of the nozzle. 6. The method of claim 1, wherein the control unit includes: a dispensing amount setting unit to set a dispensing amount of liquid crystal to be dropped onto the substrate; a dispensing amount compensating unit to compensate a differential value between the dispensing amount of liquid crystal set by the dispensing amount setting unit and a substantial dispensing amount onto the substrate; a motor driving unit to operate the discharge pump by driving a motor; and a substrate driving unit to drive the substrate so that the dispensing position of a substrate where the liquid crystal is to be dispensed is aligned with the nozzle. 7. The method of claim 6, wherein the dispensing amount setting unit includes: an input unit to input data; a total dispensing amount calculating unit to calculate a total dispensing amount of liquid crystal to be dispensed onto the substrate based on the data input into the input unit; a single dispensing amount calculating unit to calculate a single dispensing amount of liquid crystal based on the calculated total dispensing amount of liquid crystal; and a dispensing position calculating unit to calculate a dispensing position of liquid crystal based on the calculated total dispensing amount of liquid crystal. 8. The method of claim 6, wherein the dispensing amount compensating unit includes: a dispensing amount measuring unit to measure a dispensing amount of liquid crystal dispensed onto the substrate; a differential value calculating unit to calculate a differential value between a dispensing amount of liquid crystal measured by the dispensing amount measuring unit and a preset dispensing amount of liquid crystal; a dispensing amount limitation value setting unit to set a limitation value of the differential value of the dispensing amount; and a comparing unit to compare the dispensing amount differential value and the dispensing amount limitation value respectively input from the differential value calculating unit and the dispensing amount limitation value setting unit and to output a signal to the motor driving unit. 9. The method of claim 8, wherein when the dispensing amount of liquid crystal exceeds the first limitation value, a signal is output to the motor to compensate the dispensing amount. 10. The method of claim 8, wherein when the dispensing amount of liquid crystal exceeds second first limitation value, a signal is output to the motor to stop the liquid crystal dispensing. 11. The method of claim 1, wherein the second limitation value is greater than the first limitation value. 12. The method of claim 11, wherein the first limitation value corresponds to 0.3% of a preset dispensing amount of liquid crystal. 13. The method of claim 11, wherein the second limitation value corresponds to 0.5% of a preset dispensing amount of liquid crystal. 14. The method of claim 8, wherein the dispensing amount measuring unit includes a gravimeter. 15. The method of claim 6, wherein the motor driving unit includes: a pulse value storing unit to store pulse value information regarding a dispensing amount of liquid crystal; and a pulse value converting unit to convert a single dispensing amount setting value input from the dispensing amount setting unit and a dispensing amount compensating value input from the dispensing amount compensating unit into a pulse value based on the pulse value information stored in the pulse value storing unit. 16. A method of manufacturing a liquid crystal display device comprising: providing first and second substrates; dispensing liquid crystal onto one of the first and second substrates using liquid crystal dispensing system, the liquid crystal dispensing system including a plurality of dispensers to dispense liquid crystal onto a substrate defining a plurality of unit panels; and a control unit to control a dispensing amount of liquid crystal dispensed from the liquid crystal dispenser, the control unit compensating the dispensing amount when the dispensing amount of liquid crystal exceeds a first limitation value and the control unit stopping the dispensing the liquid crystal when the dispensing amount of liquid crystal exceeds a second limitation value; and joining together the first and second substrates. 17. The method of claim 16, wherein the liquid crystal dispenser includes: a container to contain liquid crystal; a discharge pump having a case with a liquid crystal injection hole and a liquid crystal discharge opening, a cylinder, a piston inserted into the cylinder and provided with a groove at a lower portion thereof to draw in and discharge liquid crystal by rotating and moving up and down, a suction opening through which liquid crystal is drawn in as the piston moves, and a discharge opening through which liquid crystal discharged as the piston moves; a first motor to drive the discharge pump; and a nozzle disposed at a lower portion of the discharge pump to dispense liquid crystal discharged from the discharge pump. 18. The method of claim 17, wherein the control unit includes: a control member contacting the discharge pump to adjust a fixation angle of the discharge pump; a second motor connected to the control member by a rotational shaft to control the control member; and a dispensing amount setting unit to set a dispensing amount of liquid crystal and to output a signal corresponding to the preset dispensing amount to the second motor. 19. The method of claim 17, wherein the control unit includes: a controlling member contacting the discharge pump to adjust a fixation angle of the discharge pump; a second motor connected to the controlling member by the rotational shaft to control the controlling member; and a dispensing amount compensating unit to compensate a dispensing amount of liquid crystal by comparing a measured dispensing amount with a predetermined dispensing amount. 20. The method of claim 17, wherein the control unit includes: a controlling member contacting the discharge pump to adjust a fixation angle of the discharge pump; a second motor connected to the controlling member by the rotational shaft to control the controlling member; a dispensing amount setting unit to set a dispensing amount of liquid crystal and to output a signal corresponding to the preset dispensing amount to the second motor; and a dispensing amount compensating unit to compensate a dispensing amount of liquid crystal by comparing a measured dispensing amount with a dispensing amount set by the dispensing amount setting unit. 21. The method of claim 20, wherein the dispensing amount compensating means includes: a dispensing amount measuring unit to measure a dispensing amount of liquid crystal dispensed onto a substrate; a differential value calculating unit to calculate a differential value between a dispensing amount of liquid crystal measured by the dispensing amount measuring unit and a preset dispensing amount of liquid crystal; a dispensing amount limitation value setting unit to set a limitation value of the differential value of the dispensing amount; and a comparing unit to compare the dispensing amount differential value and the dispensing amount limitation value respectively input from the differential value calculating unit and the dispensing amount limitation value setting unit and to output a signal to the motor driving unit. 22. The method of claim 21, wherein when the dispensing amount of liquid crystal exceeds the first limitation value, a signal is output to the second motor to compensate the dispensing amount. 23. The method of claim 21, wherein when the dispensing amount of liquid crystal exceeds the second limitation value, a signal is output to the motor to stop dispensing the liquid crystal. 24. The method of claim 16, wherein the second limitation value is greater than the first limitation value. 25. The method of claim 24, wherein the first limitation value corresponds to 0.3% of a preset dispensing amount of liquid crystal. 26. The method of claim 24, wherein the second limitation value corresponds to 0.5% of a preset dispensing amount of liquid crystal.
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