Method for manufacturing liquid crystal display device
First Claim
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1. A method for manufacturing a liquid crystal display device, comprising the steps of:
- forming a frame-shaped seal pattern of a sealant, which has openings at both ends of short sides over a first substrate on which rubbing treatment is performed;
dropping droplets of smectic liquid crystal over the first substrate inside the frame-shaped seal pattern a plurality of times so that the droplets are aligned in a direction parallel to a direction of the rubbing treatment;
attaching the first substrate to a second substrate on which rubbing treatment is performed, so that the droplets are crushed and spread inside the frame-shaped seal pattern, and the openings are then sealed by pressing the sealant.
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Abstract
Smectic liquid crystal is dropped by a dropping method in which a plurality of droplets of smectic liquid crystal are dropped to an alignment film so that the droplets are aligned in a line which is parallel to a rubbing direction of the alignment film which is formed in a region surrounded by a seal pattern of a sealant having an opening over a substrate. Excess liquid crystal is drained away from the seal pattern of a sealant through the opening of the seal pattern.
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Citations
30 Claims
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1. A method for manufacturing a liquid crystal display device, comprising the steps of:
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forming a frame-shaped seal pattern of a sealant, which has openings at both ends of short sides over a first substrate on which rubbing treatment is performed; dropping droplets of smectic liquid crystal over the first substrate inside the frame-shaped seal pattern a plurality of times so that the droplets are aligned in a direction parallel to a direction of the rubbing treatment; attaching the first substrate to a second substrate on which rubbing treatment is performed, so that the droplets are crushed and spread inside the frame-shaped seal pattern, and the openings are then sealed by pressing the sealant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for manufacturing a liquid crystal display device, comprising the steps of:
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forming a frame-shaped seal pattern of a sealant, which has openings at both ends of short sides over a first substrate on which rubbing treatment is performed; dropping droplets of smectic liquid crystal over the first substrate inside the frame-shaped seal pattern a plurality of times so that the droplets are partially overlapped with one another and aligned in a direction parallel to a direction of the rubbing treatment; attaching the first substrate to a second substrate on which rubbing treatment is performed, so that the droplets are crushed and spread inside the frame-shaped seal pattern, and the openings are then sealed by pressing the sealant. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for manufacturing a liquid crystal display device, comprising the steps of:
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forming a frame-shaped seal pattern of a sealant, which has openings at four corners of the sealant over a first substrate on which rubbing treatment is performed; dropping droplets of smectic liquid crystal over the first substrate inside the frame-shaped seal pattern a plurality of times so that the droplets are aligned in a direction parallel to a direction of the rubbing treatment; and attaching the first substrate to a second substrate on which rubbing treatment is performed, so that the droplets are crushed and spread inside the frame-shaped seal pattern, and the openings are then sealed by pressing the sealant, wherein the frame-shaped seal pattern is rectangular. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification
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Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
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Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
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InventorsIshitani, Tetsuji, Nishi, Takeshi
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Primary Examiner(s)Aftergut, Jeff
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Assistant Examiner(s)Lee, Jaeyun
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Application NumberUS12/073,614Publication NumberTime in Patent Office1,425 DaysField of Search156/292, 156/295, 349/187US Class Current156/292CPC Class CodesB32B 2037/243 CoatingB32B 2309/02 TemperatureB32B 2309/04 TimeB32B 2310/0831 using UV radiationB32B 2310/0843 using laserB32B 2311/00 Metals, their alloys or the...B32B 2377/00 PolyamidesB32B 2379/08 PolyimidesB32B 2457/202 LCD, i.e. liquid crystal di...B32B 37/24 with at least one layer not...G02F 1/1339 Gaskets; Spacers; Sealing o...G02F 1/1341 Filling or closing of cellsG02F 1/13415 Drop filling processG02F 1/13454 Drivers integrated on the a...G02F 1/136277 formed on a semiconductor s...G02F 1/1368 in which the switching elem...G02F 1/141 using ferroelectric liquid ...
