Liquid crystal element

• US 6,812,977 B1
• Filed: 11/21/2000
• Issued: 11/02/2004
• Est. Priority Date: 11/22/1999
• Status: Expired due to Fees

• Current Assignee: Minolta Co., Ltd. (Konica Minolta Inc.)
• Original Assignee: Minolta Co., Ltd. (Konica Minolta Inc.)
• Inventors: Nishiguchi, Kenji, Okada, Masakazu, Kobayashi, Nobuyuki, Matsumoto, Mitsuyo, Hisamitsu, Akihito, Ueda, Hideaki, Motoori, Fumie, Iwamatsu, Masako
• Primary Examiner(s): Kim, Robert H.
• Assistant Examiner(s): Akkapeddi, P. R.
• Application Number:
  US09/718,138
• Time in Patent Office: 1,442 Days
• Field of Search: 349/73, 349/74, 349/122, 349/158
• US Class Current: 349/73
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/13473 for wavelength filtering or for colour display without the use of colour mosaic filters
• CPC Class Codes: G02F 1/13718 based on a change of the texture state of a cholesteric liquid crystal
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

A liquid crystal element of a layered type capable of high contrast is provided.

For example, in the liquid crystal element of the layered type including liquid crystal layers b, g and r in this order, each of the liquid crystal layers b, g and r is held between electrode formation surfaces of a pair of substrates each provided with an electrode, an insulating film is disposed between the electrodes of the substrates, and at least two liquid crystal layers of the liquid crystal layers b, g and r have the insulating films opposed to the liquid crystal layers and being different in refractive index from each other, respectively.

Claims

1. A liquid crystal element of a layered type comprising:

a plurality of liquid crystal elements layered and adhered together, wherein

each of said liquid crystal elements has a pair of substrates and a liquid crystal layer held between said substrates, and an adhesive layer disposed between the neighboring substrates of the neighboring liquid crystal elements for adhering the neighboring liquid crystal elements has a thickness not exceeding a quarter of a thickness of at least one of the neighboring substrates.

2. The liquid crystal element of the layered type according to claim 1, wherein

the thickness of said adhesive layer is 30 μ m or less.

3. The liquid crystal element of the layered type according to claim 1, wherein

the thickness of said substrate is in a range from 50 μ

m to 250 μ

m.

4. The liquid crystal element of the layered type according to claim 1, wherein

said liquid crystal elements layered together are three or more in number.

5. The liquid crystal element of the layered type according to claim 1, wherein

said substrate is formed of a resin substrate.