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

• US 20100097563A1
• Filed: 07/01/2009
• Published: 04/22/2010
• Est. Priority Date: 07/01/2008
• Status: Active Grant

• Current Assignee: Gentex Corporation
• Original Assignee: Gentex Corporation
• Inventors: Zhang, Guomin
• Granted Patent: US 8,848,158 B2
• Time in Patent Office: Days
• US Class Current: 349/186
• CPC Class Codes: C09K 19/3068 chain containing -COO- or -OCO- groups
• CPC Class Codes: C09K 19/3488 the heterocyclic ring having more than 6 members, e.g. macrocycles, phthalocyanines
• CPC Class Codes: C09K 19/42 Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
• CPC Class Codes: C09K 2019/3004 Cy-Cy
• CPC Class Codes: C09K 2019/3075 Cy-COO-Ph
• CPC Class Codes: C09K 2019/3083 Cy-Ph-COO-Ph

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 a macrocyclic ether and/or a borane; 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;

at least one of a macrocyclic ether and a borane; and

a nematic, negative dielectric anisotropic liquid crystal mixture.

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

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

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

5. The reverse mode liquid crystal display device according to claim 1, wherein the macrocyclic ether is represented by the following formula:

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

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

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

9. The reverse mode liquid crystal display device according to claim 1, wherein the borane is 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 at least one of the macrocyclic ether and borane comprises approximately 1% to approximately 5% by weight of the liquid crystal medium.

16. 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.

17. 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.

18. 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.