Liquid crystal display device and associated liquid crystal media for use in the same

• US 7,803,285 B2
• Filed: 07/01/2008
• Issued: 09/28/2010
• Est. Priority Date: 07/01/2008
• Status: Active Grant

• Current Assignee: Gentex Corporation
• Original Assignee: Gentex Corporation
• Inventors: Zhang, Guomin
• Primary Examiner(s): Visconti; Geraldina
• Application Number:
  US12/215,949
• Publication Number:
  US 20100040804A1
• Time in Patent Office: 819 Days
• Field of Search: 252/299.01, 252/299.1, 252/299.6, 428/1.1, 430/20
• US Class Current: 252/299.1
• CPC Class Codes: C09K 19/3001 Cyclohexane rings
• CPC Class Codes: C09K 19/3003 Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
• CPC Class Codes: C09K 19/3068 chain containing -COO- or -OCO- groups
• CPC Class Codes: C09K 19/54 Additives having no specific mesophase characterised by their chemical composition
• CPC Class Codes: C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition

Abstract

A reverse mode liquid crystal display device, including: a first substantially transparent substrate having an electrically conductive material associated therewith; a second substrate having an electrically conductive material associated therewith; an insulating layer associated with at least one of the first and second substrates; and a liquid crystal medium contained within a chamber positioned between the first and second substrates which includes an organometallic chelate; and a nematic, negative dielectric anisotropic liquid crystal mixture.

Claims

1. A reverse mode liquid crystal display device, comprising:

a first substantially transparent substrate having an electrically conductive material associated therewith;

a second substrate having an electrically conductive material associated therewith;

an insulating layer associated with at least one of the first and second substrates; and

a liquid crystal medium contained within a chamber positioned between the first and second substrates which comprises;

an organometallic chelate; and

a nematic, negative dielectric anisotropic liquid crystal mixture.

2. The reverse mode liquid crystal display device according to claim 1, wherein the organometallic chelate is represented by the following formula:

3. The reverse mode liquid crystal display device according to claim 1, wherein the organometallic chelate is represented by the following formula:

4. The reverse mode liquid crystal display device according to claim 1, wherein the organometallic chelate is represented by the following formula:

5. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

6. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

7. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

8. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

9. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

10. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

11. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

12. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

13. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

14. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

15. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

16. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises a compound represented by the following formula:

17. The reverse mode liquid crystal display device according to claim 1, wherein the nematic, negative dielectric anisotropic liquid crystal mixture comprises approximately 10% to approximately 50% by weight of a compound represented by the following formula:

18. The reverse mode liquid crystal display device according to claim 17, wherein the organometallic chelate is represented by the following formula:

19. The reverse mode liquid crystal display device according to claim 1, wherein the organometallic chelate comprises approximately 1% to approximately 5% by weight of the liquid crystal medium.

20. The reverse mode liquid crystal display device according to claim 1, wherein the dielectric anisotropy Δ

_E of the nematic, negative dielectric anisotropic liquid crystal mixture ranges from approximately −

1.0 to approximately −

5.0.

21. The reverse mode liquid crystal display device according to claim 1, wherein the dielectric anisotropy Δ

_E of the nematic, negative dielectric anisotropic liquid crystal mixture ranges from approximately −

1.0 to approximately −

3.0.

22. The reverse mode liquid crystal display device according to claim 1, wherein the dielectric anisotropy Δ

_E of the nematic, negative dielectric anisotropic liquid crystal mixture ranges from approximately −

1.0 to approximately −

2.5.

23. The reverse mode liquid crystal display device according to claim 18, wherein the dielectric anisotropy Δ

_E of the nematic, negative dielectric anisotropic liquid crystal mixture ranges from approximately −

1.0 to approximately −

2.5.