Liquid crystal display cells

• US 5,838,407 A
• Filed: 02/16/1996
• Issued: 11/17/1998
• Est. Priority Date: 07/26/1991
• Status: Expired due to Term

• Current Assignee: The State Scientific Centre of The Russian Federation Niopik
• Original Assignee: Rolic AG
• Inventors: Novoseletsky, Nicolic Vasilievich, Kozenkov, Vladimir Marcovich, Chigrinov, Vladimir Grigorievich, Schmitt, Klaus, Schadt, Martin, Reshetnyak, Victor Yurievich, Reznikov, Yuriy Alexandrovich
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): DUDEK, JAMES A
• Application Number:
  US08/601,310
• Time in Patent Office: 1,005 Days
• Field of Search: 359/75, 359/76, 359/78, 379/119, 379/117
• US Class Current: 349/117
• CPC Class Codes: G02F 1/133711 by organic films, e.g. polymeric films
• CPC Class Codes: G02F 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/133757 with different alignment orientations
• CPC Class Codes: G02F 1/133765 without a surface treatment
• CPC Class Codes: G02F 1/133788 by light irradiation, e.g. linearly polarised light photo-polymerisation
• CPC Class Codes: G02F 1/1396 the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell G02F1/141 takes precedence

Abstract

In liquid crystal display cells comprising a liquid crystal (7) disposed between two substrate plates (1,2) provided with drive electrodes (3,4), the orientation layer (5,6) on the inner sides of the plates where the electrodes are disposed comprises an oriented photopolymer layer. This layer is formed by irradiating photopolymer layer. This layer is formed by irradiating photoreactive material with linear polarized light.

Claims

1. A liquid crystal display cell comprising an oriented liquid crystal layer disposed between two plates which are provided with transparent electrode layers disposed on the inner sides of said plates, and orientation layers disposed on the inner sides of the electrode layers and aligning the adjacent liquid crystal molecules in predetermined directions, at least one of said orientation layers comprising an oriented linearly polarized light modified photopolymer.

2. The liquid crystal display cell according to claim 1, wherein the predetermined directions on the two plates are different.

3. The liquid crystal display cell according to claim 1, wherein a nematic liquid crystal is linearly oriented by the orientation layers in a predetermined direction, the tilt angle θ

between the nematic direction and the substrate surface being between 0≦

θ

<

85°

.

4. The liquid crystal display cell according to claim 1, further comprising a pattern of regions with different predetermined orientations.

5. The liquid crystal display cell according to claim 1, further comprising a pattern or regions with predetermined orientation and non-oriented regions.

6. The liquid crystal display cell according to claim 3, wherein the two plates have different orientation patterns differing with respect to different predetermined orientations and resulting in different twist angles of the liquid crystal.