LIQUID CRYSTAL DROPPING DEVICE AND METHOD OF MANUFACTURING LIQUID CRYSTAL DISPLAY APPARATUS

• US 20160334655A1
• Filed: 01/23/2014
• Published: 11/17/2016
• Est. Priority Date: 01/23/2014
• Status: Active Grant

• Current Assignee: Sakai Display Products Corporation (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sakai Display Products Corporation (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Tokunaga, Hiroaki, Kasahara, Shinya
• Granted Patent: US 9,772,524 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/1303 Apparatus specially adapted to the manufacture of LCDs
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/13415 Drop filling process
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/136295 Materials; Compositions; Manufacture processes
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel

Abstract

Provided are: a liquid crystal dropping device capable of accurately dropping liquid crystal material while generation of foreign substances is suppressed; and a method of manufacturing a liquid crystal display apparatus capable of manufacturing a liquid crystal display apparatus with preferable display quality and high yield in which the occurrence of a display failure such as a luminous-dot failure is suppressed.

The liquid crystal dropping device 1 includes a liquid crystal bottle 2 which stores liquid crystal material 61, a three-way valve 3, a liquid crystal ejecting part 4, a nozzle 5 and a driving unit 7. The liquid crystal ejecting part 4 includes a syringe 41 with a bottomed cylindrical shape as well as a plunger 44 constituted by a slide part 42 which slides in the syringe 41 and a support 43 which has a bar-like shape and supports the slide part 42. The operation control part 8 reciprocates the plunger 44 before the liquid crystal material 61 is dropped from the nozzle 5, with a reciprocating distance shorter than a stroke for dropping the liquid crystal material.

Claims

1. A liquid crystal dropping device configured to drop the liquid crystal material onto a substrate, comprising:

a syringe which is used for storing the liquid crystal material;

a plunger being reciprocated in the syringe; and

a driving unit which drives the plunger, further comprising

a unit which controls reciprocation of the plunger by the driving unit before the liquid crystal material is dropped onto the substrate, with a reciprocating distance shorter than a stroke required for dropping the liquid crystal material.

2. The liquid crystal dropping device according to claim 1, wherein

the syringe is made of glass, and

a leading end of the plunger is made of a fluorine-based resin.

3. A method of manufacturing a liquid crystal display device, comprising, with the use of a liquid crystal dropping device including a syringe which is used for storing the liquid crystal material, a plunger being reciprocated in the syringe and a driving unit which drives the plunger, the steps of dropping the liquid crystal material onto a surface of a first substrate;

and bonding a second substrate to a part of the surface of the first substrate, further comprising the step of

reciprocating the plunger by the driving unit in the case where the syringe and the plunger are switched in accordance with the one substrate, the step of reciprocating being performed after the switching and before the step of dropping.