Anisotropic nanoparticles and anisotropic nanostructures and pixels, displays and inks using them

• US 7,119,161 B2
• Filed: 03/31/2005
• Issued: 10/10/2006
• Est. Priority Date: 03/31/2004
• Status: Active Grant

• Current Assignee: Gula Consulting Limited Liability Company (Intellectual Ventures LLC)
• Original Assignee: Solaris Nanosciences Incorporated
• Inventors: Lawandy, Nabil M.
• Primary Examiner(s): BOYKIN, TERRESSA M
• Application Number:
  US11/096,221
• Publication Number:
  US 20050218377A1
• Time in Patent Office: 558 Days
• Field of Search: 345/211, 349/141, 349/187, 528/190
• US Class Current: 528/190
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C09K 19/0208 Twisted Nematic (T.N.); Super Twisted Nematic (S.T.N.); Optical Mode Interference (O.M.I.)
• CPC Class Codes: C09K 19/0225 Ferroelectric
• CPC Class Codes: C09K 19/52 characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
• CPC Class Codes: C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
• CPC Class Codes: G02F 1/13725 based on guest-host interaction G02F1/13762, G02F1/13737, take precedence
• CPC Class Codes: G02F 1/13762 containing luminescent or electroluminescent additives

Abstract

A pixel that includes a liquid crystal material and one or more of an anisotropic nanoparticle and an anisotropic nanostructure is provided. Displays including the pixel are also disclosed. An ink which includes a liquid crystal material and one or more of an anisotropic nanoparticle and an anisotropic nanostructure is also provided.

Claims

1. A pixel comprising a liquid crystal material doped with one or more of an anisotropic nanoparticle and an anisotropic nanostructure, in which the anisotropic nanoparticle or anisotropic nanostructure has a different plasmon resonance absorption or fluorescence emission in a first orientation than a plasmon resonance absorption or fluorescence emission in a second orientation.

2. The pixel of claim 1 in which the pixel is configured to reduce chromatic distortion as a function of viewing angle when non-orthogonal.

3. The pixel of claim 2 in which the chromatic distortion is reduced by at least about 10%.

4. The pixel of claim 1 in which the anisotropic nanoparticle or the anisotropic nanostructure includes one or more members selected from the group consisting of silver, gold, platinum, palladium, ruthenium, rhodium, osmium, iridium, and alloys thereof.

5. The pixel of claim 1 further comprising two different anisotropic nanoparticles or two different anisotropic nanostructures.

6. The pixel of claim 1 in which the liquid crystal material comprises one or more members selected from the group consisting of a nematic liquid crystal, a twisted nematic liquid crystal, a ferroelectric liquid crystal, a surface stabilized ferroelectric liquid crystal, and an E7 liquid crystal.

7. The pixel of claim 1 in which the anisotropic nanostructure comprises an anisotropic nanotube or an anisotropic nanorod.

8. The pixel of claim 7 in which the anisotropic nanotube comprises one or more members selected from the group consisting of a single wall nanotube, a multiwall nanotube, a single wall nanotube comprising an associated chromophore and a multiwall nanotube comprising an associated chromophore.

9. The pixel of claim 1 in which the anisotropic nanoparticle or the anisotropic nanostructure emits light in response to excitation.

10. The pixel of claim 1 in which the anisotropic nanoparticle or the anisotropic nanostructure is disposed in a liquid crystal host material.

11. The pixel of claim 1 in which the anisotropic nanoparticle or the anisotropic nanostructure is encapsulated to form a microcapsule.

12. The pixel of claim 11 in which the liquid crystal material is encapsulated in the microcapsule.

13. The pixel of claim 1 in which the anisotropic nanoparticle or the anisotropic nanostructure comprises a semiconductor.

14. A liquid crystal display comprising the pixel of claim 1.

15. The liquid crystal display of claim 14 in which each pixel of the liquid crystal display comprises the pixel of claim 1.

24. The pixel of claim 1 in which the anisotropic nanoparticle or the anisotropic nanostructure is selected to provide a plasmon absorption resonance or fluorescence emission for visual enhancement of the pixel.

16. An ink comprising a liquid crystal material doped with one or more of an anisotropic nanoparticle and an anisotropic nanostructure, in which the anisotropic nanoparticle or anisotropic nanostructure has a different plasmon resonance absorption or fluorescence emission in a first orientation than a plasmon resonance absorption or fluorescence emission in a second orientation.

17. The ink of claim 16 in which the anisotropic nanoparticle or the anisotropic nanostructure is encapsulated to form a microcapsule.

18. The ink of claim 16 in which the liquid crystal material is one or more members selected from the group consisting of a nematic liquid crystal, a twisted nematic liquid crystal, a ferroelectric liquid crystal, a surface stabilized ferroelectric liquid crystal, and an E7 liquid crystal.

19. The ink of claim 16 further comprising a carrier.

20. The ink of claim 19 in which the carrier is a paste ink carrier or a UV curing ink carrier, or combinations thereof.

21. A method comprising doping a liquid crystal display pixel with one or more of an anisotropic nanoparticle and an anisotropic nanostructure, in which the anisotropic nanoparticle or anisotropic nanostructure has a different plasmon resonance absorption or fluorescence emission in a first orientation than a plasmon resonance absorption or fluorescence emission in a second orientation.

22. The method of claim 21 further comprising configuring the anisotropic nanoparticle or the anisotropic nanostructure to be present in an amount effective to reduce chromatic distortion, as a function of viewing angle when non-orthogonal, by at least about 10%.

23. A method of facilitating visual enhancement of a pixel by providing a pixel comprising a liquid crystal material doped with one or more of an anisotropic nanoparticle and an anisotropic nanostructure, in which the anisotropic nanoparticle or anisotropic nanostructure has a different plasmon resonance absorption or fluorescence emission in a first orientation than a plasmon resonance absorption or fluorescence emission in a second orientation.