Image display device

• US 5,784,139 A
• Filed: 02/16/1996
• Issued: 07/21/1998
• 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 (BASF SE)
• Inventors: Chigrinov, Vladimir Grigorievich, Novoseletsky, Nicolic Vasilievich, Kozenkov, Vladimir Marcovich, Reshetnyak, Victor Yurievich, Reznikov, Yuriy Alexandrovich, Schmitt, Klaus, Schadt, Martin
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Dudek, James A.
• Application Number:
  US08/602,942
• Time in Patent Office: 886 Days
• Field of Search: 359/73, 359/68, 349/117, 349/118, 349/119, 349/120, 349/121
• US Class Current: 349/117
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography
• CPC Class Codes: G02F 1/133565 inside the LC elements, i.e. between the cell substrates
• CPC Class Codes: G02F 1/13363 Birefringent elements, e.g. for optical compensation
• CPC Class Codes: G02F 1/133631 with a spatial distribution of the retardation value
• CPC Class Codes: G02F 1/133638 Waveplates, i.e. plates with a retardation value of lambda/n
• CPC Class Codes: G02F 1/133788 by light irradiation, e.g. linearly polarised light photo-polymerisation
• CPC Class Codes: G02F 2413/01 Number of plates being 1
• CPC Class Codes: H04N 13/337 using polarisation multiplexing
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

The image-producing device comprises a liquid crystal cell with a liquid crystal (10, 21, 44) between two plates provided with drive electrodes (2, 6; 24, 25; 42, 46) and wall orientation layer (3, 7; 26,27; 43, 45) and an optically anisotropic polymeric additional element (9, 31, 52). The additional element, which can be a separate element or in the form of a coating or a foil stuck directly to the cell, comprises an oriented photopolymer.

Claims

1. An image display device comprising a liquid crystal cell having a liquid crystal disposed between two plates provided with drive electrodes, wall orientation layers, and an optically anisotropic layer containing a linearly polarized light modified polymer.

2. The device according to claim 1, wherein the anisotropic layer is divided into a number of separate regions having optical properties which vary from region to region.

3. The device according to claim 2, wherein the regions form a regular grid in which two different optical properties alternate.

4. The device according to claim 2 were in the optical path varies from region to region.

5. The device according to claim 2, wherein a position of a double refraction ellipsoid varies from region to region.

6. The device according to claim 1, wherein the liquid crystal is a super twisted nematic liquid crystal and the anisotropic layer has an optical path difference which compensates the inherent color of the cell.

7. The device according to claim 2, wherein the anisotropic layer has an optical path difference which alters the color of the cell.

8. The device according to claim 7, wherein the regions form different color pixels for the color display.

9. The device according to claim 3, wherein the optical properties of the regions result in different directions of polarization, so that different picture items can be simultaneously displayed.

10. The device according to claim 4, wherein the optical properties of the regions result in different directions of polarization, so that different picture items can be simultaneously displayed.

11. The device according to claim 5, wherein the optical properties of the regions result in different directions of polarization, so that different picture items can be simultaneously displayed.

12. The device according to claim 6, wherein the anisotropic layer is divided into a number of separate regions and the optical properties of the regions result in different directions of polarization, so that different picture items can be simultaneously displayed.

13. The device according to claim 9, wherein the different picture items comprise the right and left items of a stereoscopic picture.

14. The device according to claim 13, wherein the anisotropic layer is part of a screen in an object plane of a rear projection system.

15. The device according to claim 13, wherein the anisotropic layer is part of a screen in an image plane of a rear projection system.

16. The device according to claim 13, wherein the anisotropic layer is part of a screen in an object plane of a forward projection system.

17. The device according to claim 10, wherein the anisotropic layer is part of a screen in an image plane of a forward projection system.

18. An image display device comprising a liquid crystal having a liquid crystal disposed between two plates provided with drive electrodes, wall orientation layers, and an optically anisotropic layer containing a linearly polarized light modified polymer photochemical, the optically anisotropic layer being divided into a number of separate regions, the optical properties of the regions resulting in different directions of polarization, so that different picture items can be simultaneously displayed.