Patent EP0216632A2 successfully refreshed from Google Patents.
EP0216632A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal electro-optical element and process for preparation thereof
Assignee: Seiko Instruments Inc
•
Filing: 1986-09-23
•
Granted: —
•
Expires: 2006-09-23
Abstract
Abstract A liquid crystal electro-optical element consists of a liquid crystal sealed between two substrates (l,3) each coated with an electrode (9) and an alignmental film (7). Spacer particles (2) regulate the height of the space between the substrates (l,3) which is bounded by a peripheral sealing material (4). <??>In the manufacture of the element epoxy resin adhesive particles (8) having a latent curing agent therein are located on the lower substrate (l), these particles (8) being larger than the spacer particles (2) so that, on applying the upper substrate (3) under conditions of pressure and heat, the particles (8) become deformed and cured, thus helping to prevent warping of the substrates (l,3) and enabling a minute uniform space to be maintained between them.
Inventors
- 👤 Ito Kokichi
- 👤 Harada Takamasa
- 👤 Oka Koichiro
- 👤 Ikeuchi Hiroyuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/16; C08G; C08G59/00; C08G59/18; C08G59/188; C09; C09J; C09J163/00; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13392; C08J2363/00; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
101 words
A liquid crystal electro-optical element comprising a liquid crystal, two substrates secured by a sealing material to confront each other and hold the liquid crystal therebetween, spacer particles dispersed and arranged between the two substrates to maintain a certain space between the substrates and alignmental films present in interfaces between the liquid crystal and the substrates to line up molecules of the liquid crystal, wherein the substrates are spot-bonded to each other through adhesive particles comprising as the main component an epoxy resin having a latent curing agent incorporated therein, which are dispersed and arranged in the space between the substrates.
Claim 2
Dependent Claim
101 words
A liquid crystal electro-optical element comprising a liquid crystal, two substrates secured by a sealing material to confront each other and hold the liquid crystal therebetween, spacer particles dispersed and arranged between the two substrates to maintain a certain space between the substrates and alignmental films present in interfaces between the liquid crystal and the substrates to line up molecules of the liquid crystal, wherein the substrates are spot-bonded to each other through adhesive particles comprising as the main component an epoxy resin having a latent curing agent incorporated therein, which are dispersed and arranged in the space between the substrates.
Claim 3
Dependent Claim
20 words
A liquid crystal electro-optical element as set forth in claim l, wherein the liquid crystal is a smectic liquid crystal.
Claim 4
Dependent Claim
47 words
A liquid crystal electro-optical element as set forth in claim l or claim 2, wherein the liquid crystal is a ferroelectric liquid crystal having a spiral molecule arrangement structure and the space between the two substrates is not larger than the spiral period of the liquid crystal.
Claim 5
Dependent Claim
23 words
A liquid crystal electro-optical element as set forth in any preceding claim, wherein the space between the substrates is l to 3 µm.
Claim 6
Dependent Claim
34 words
A liquid crystal electro-optical element as set forth in claim l, wherein the liquid crystal is a cholesteric, super-twist or nematic liquid crystal and the space between the substrates if 3 to 20 µm.
Claim 7
Dependent Claim
31 words
A liquid crystal electro-optical element as set forth in any preceding claim, wherein the epoxy resin adhesive particles have a deformed spherical shape pressed by the pressure between the two substrates.
Claim 8
Dependent Claim
19 words
A liquid crystal electro-optical element as set forth in any preceding claim, wherein the substrate is a glass sheet.
Claim 9
Dependent Claim
24 words
A liquid crystal electro-optical element as set forth in any one of claims l to 6, wherein the substrate is a transparent plastic sheet.
Claim 10
Dependent Claim
19 words
A liquid crystal electro-optical element as set forth in claim 8, wherein the substrate is a monoaxially oriented film.
Claim 11
Dependent Claim
35 words
l0. A liquid crystal electro-optical element as set forth in any preceding claim, wherein the epoxy resin adhesive particles are present in an amount of 0.l to 50 mg per l00 cm² of the substrate.
Claim 12
Dependent Claim
88 words
A liquid crystal electro-optical element as set forth in any preceding claim, wherein the epoxy resin adhesive particles are particles comprising at least an epoxy resin as the main component, said epoxy resin contains a latent curing agent compatibly therein, and said particles have an average particle size of l to 20 µm and have such a particle size distribution that particles having a size of from 0.5 × (average particle size) to l.5 × (average particle size) constitute at least 90% by weight of the total particles.
Claim 13
Dependent Claim
22 words
A liquid crystal electro-optical element as set forth in any preceding claim, wherein the latent curing agent is a phenol type compound.
Claim 14
Dependent Claim
165 words
A process for the preparation of a liquid crystal electro-optical element comprising a liquid crystal, two substrates secured by a sealing material to confront each other with a certain space and hold the liquid crystal therebetween, and alignmental films present in interfaces between the liquid crystal and the substrates to line up molecules of the liquid crystal, said process comprising the steps of arranging the sealing material on one substrate having an electrode and alignmental film on the surface thereof in a peripheral edge portion thereof on the alignmental film side, dispersing and arranging spacer particles having a diameter equal to an intended space length and adhesive particles comprising as the main component an epoxy resin having a latent curing agent incorporated therein, which have a particle size larger than the diameter of the spacer particles, on the surface of one substrate, bonding the two substrates by heat-pressing the substrates in the piled state, and sealing the liquid crystal in the space between the substrates.
Claim 15
Dependent Claim
165 words
A process for the preparation of a liquid crystal electro-optical element comprising a liquid crystal, two substrates secured by a sealing material to confront each other with a certain space and hold the liquid crystal therebetween, and alignmental films present in interfaces between the liquid crystal and the substrates to line up molecules of the liquid crystal, said process comprising the steps of arranging the sealing material on one substrate having an electrode and alignmental film on the surface thereof in a peripheral edge portion thereof on the alignmental film side, dispersing and arranging spacer particles having a diameter equal to an intended space length and adhesive particles comprising as the main component an epoxy resin having a latent curing agent incorporated therein, which have a particle size larger than the diameter of the spacer particles, on the surface of one substrate, bonding the two substrates by heat-pressing the substrates in the piled state, and sealing the liquid crystal in the space between the substrates.
Claim 16
Dependent Claim
24 words
A process for the preparation of a liquid crystal electro-optical element according to claim l3, wherein the liquid crystal is a smectic liquid crystal.
Claim 17
Dependent Claim
50 words
A process for the preparation of a liquid crystal electro-optical element according to claim l3 or claim l4, wherein the liquid crystal is a ferro-electric liquid crystal having a spiral molecule arrangement structure and the space between the substrates is not larger than the spiral period of the liquid crystal.
Claim 18
Dependent Claim
31 words
A process for the preparation of a liquid crystal electro-optical element according to any one of claims l3 to l5, wherein the space between the substrates is l to 3 µm.
Claim 19
Dependent Claim
37 words
A process for the preparation of a liquid crystal electro-optical element according to claim l3, wherein the liquid crystal is a cholesteric or nematic liquid crystal and the space between the substrates is 3 to 20 µm.
Claim 20
Dependent Claim
39 words
A process for the preparation of a liquid crystal electro-optical element according to any one of claims l3 to l7, wherein the epoxy resin adhesive particles have a deformed spherical shape pressed by the pressure between the two substrates.
Claim 21
Dependent Claim
27 words
A process for the preparation of a liquid crystal electro-optical element according to any one of claims l3 to l8, wherein the substrate is a glass sheet.
Claim 22
Dependent Claim
28 words
A process for the preparation of a liquid crystal electro-optical element according to any one of claims l3 to l9, wherein the substrate is a transparent plastic sheet.
Claim 23
Dependent Claim
29 words
2l. A process for the preparation of a liquid crystal electro-optical element according to any one of claims l3 to l9, wherein the substrate is a monoaxially oriented film.
Claim 24
Dependent Claim
42 words
A process for the preparation of a liquid crystal electro-optical element according to any one of claims l3 to 2l, wherein the epoxy resin adhesive particles are present in an amount of 0.l to 50 mg per l00 cm² of the substrate.
Claim 25
Dependent Claim
90 words
A process for the preparation of a liquid crystal electro-optical element according to claim l3, wherein the epoxy resin adhesive particles are particles comprising at least an epoxy resin as the main component, said epoxy resin contains a latent curing agent compatibly therein, and said particles have an average particle size of l to 20 µm and have such a particle size distribution that particles having a size of from 0.5 × (average particle size) to l.5 × (average particle size) occupy at least 90% by weight of total particles.
Claim 26
Dependent Claim
30 words
A process for the preparation of a liquid crystal electro-optical element according to any one of claims l3 to 23 wherein the latent curing agent is a phenol type compound.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.