Process for producing liquid crystal device whereby curing the sealant takes place after pre-baking the substrates

• US 5,548,429 A
• Filed: 06/14/1994
• Issued: 08/20/1996
• Est. Priority Date: 06/14/1993
• Status: Expired due to Fees

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Tsujita, Chikako
• Primary Examiner(s): Gross, Anita Pellman
• Assistant Examiner(s): Abraham, Fetsum
• Application Number:
  US08/260,212
• Time in Patent Office: 798 Days
• Field of Search: 359/80, 359/60, 359/62, 359/98, 359/82
• US Class Current: 349/187
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells

Abstract

A liquid crystal device is produced through the steps of: providing a pair of glass substrates each having thereon transparent electrodes, applying the substrates to each other with a thermosetting sealant so that the electrodes thereon oppose each other with a prescribed spacing therebetween, and disposing a liquid crystal at the spacing. In the process, prior to the step of applying the substrates, the thermosetting sealant is applied onto a prescribed part of one of the substrates, and the pair of substrates are both pre-baked under an identical condition for pre-baking the thermosetting sealant. As a result, the two substrates constituting the liquid crystal device are caused to have an identical thermal history so that the resultant liquid crystal device is provided with a uniform alignment characteristic free from difference in alignment power between the substrates and a good application accuracy between the substrates.

Claims

1. A process for producing a liquid crystal device, comprising the steps of:

providing a pair of glass substrates including a first and a second substrate each having thereon transparent electrodes,

applying a thermosetting sealant onto a prescribed part of the first substrate and pre-baking the first substrate to pre-bake the thermosetting sealant,

pre-baking the second substrate under an identical condition as the pre-baking of the first substrate,

applying the pre-baked first and second substrates to each other with the pre-baked thermosetting sealant therebetween so that the electrodes thereon oppose each other,

curing the thermosetting sealant to form a blank panel, and

injecting a liquid crystal into the blank panel to form a liquid crystal device.

2. A process according to claim 1, wherein the pair of substrates are pre-baked substantially simultaneously in a single step after applying the sealant onto said one substrate.

3. A process according to claim 1, wherein said liquid crystal is a chiral smectic liquid crystal.