Anisotropic dye layer, coordination polymer for anisotropic dye layer and polarization element, and polarization control film, polarization control element, multi-layer polarization control element, ellipse polarization plate, light emission element, and method for controlling polarization properties employing the anisotropic dye layer

• US 8,824,048 B2
• Filed: 04/26/2013
• Issued: 09/02/2014
• Est. Priority Date: 12/08/2008
• Status: Expired due to Fees

• Current Assignee: Konica Minolta OPTO Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta OPTO Incorporated (Konica Minolta Inc.)
• Inventors: Nakazawa, Yukihito
• Primary Examiner(s): FONT, FRANK G
• Application Number:
  US13/871,363
• Publication Number:
  US 20130235552A1
• Time in Patent Office: 494 Days
• Field of Search: 359/485.03, 359/485.04, 359/487.02, 349 96-103, 313/112, 313506-509
• US Class Current: 359/487.02
• CPC Class Codes: F21V 9/14 for producing polarised light
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: G02F 1/0136 for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation G02F1/0353 takes precedence
• CPC Class Codes: G02F 2202/04 dye

Abstract

An anisotropic dye layer containing a coordination polymer is disclosed. The a polarization control film containing an oriented dichroic dye in which light absorption spectrum of a molecule is reversibly changed by charge passing are disclosed.

Claims

1. A polarization film containing a dichroic dye, in an oriented state, in which light absorption spectrum of a molecule of the dichroic dye is reversibly changed by receiving and releasing charge.

2. The polarization film of claim 1, wherein the polarization properties of the film are controlled by the dye receiving and releasing charge.

3. The polarization film of claim 1, wherein the receiving and releasing charge is an oxidation-reduction reaction.

4. The polarization film of claim 1, wherein the orientation of the dichroic dye in the oriented state is in-plane uniaxial orientation.

5. A polarization control element, comprising the polarization film of claim 1 and a charge supply means.

6. The polarization control element of claim 5, wherein the charge supply means has an electrolyte layer and an electrode.

7. The polarization control element of claim 5, wherein the charge supplying means has a constitution by which supplying of the charge from the charge supplying means can be locally controlled.

9. A multi-layer polarization control element, comprising plural layers, one on top of the other, and each composed of the polarization element of claim 5, wherein each polarization element has an orientation direction of the dichroic dye contained in each of the polarization film of each polarization element and each orientation direction of each dichroic dye in each polarization film is different from each other.

11. An ellipse polarization plate comprising a retardation plate and the polarization control element of claim 5.

12. An ellipse polarization plate comprising a retardation plate and the multi-layer polarization control element of claim 9.

13. A light emission element comprising the polarization control element of claim 5.

14. A light emission element comprising the multi-layer polarization element of claim 9.

15. A light emission element comprising the ellipse polarization plate of claim 11.

16. The light emission element of claim 13, wherein the light emission element is a displaying element.

17. The light emission element of claim 13 wherein the light emission element is a lighting element.

18. The light emission element of claim 16, wherein the light emission element includes an organic electroluminescent element.

8. A method for controlling polarization properties of a polarization element comprising a polarization film and a charge supply, means, the method comprising step of:

supplying charge to the polarization film using the charge supply means,

wherein the polarization film comprises a dichroic dye, in an oriented state, which reversibly changes light absorption spectrum of a molecule of the dichroic dye by receiving and releasing charge such that the polarization property of the film is controlled.

10. A method for controlling polarization properties of a multi-layer polarization control element comprising:

supplying charge separately to each polarization film of a multi-layer polarization control element,

wherein the multi-layer polarization control element comprises a plurality of layers, one on top of the other, each layer composed of the each polarization film and a charge supply means, each polarization film comprising a dichroic dye, in an oriented state, in which light absorption spectrum of a molecule of the dichroic dye is reversibly changed by receiving and releasing charge such that the polarization properties are controlled, and

wherein each dichroic dye has an orientation direction and the orientation direction of each dichroic dye in each polarization film is different.

19. A method for controlling polarization properties, comprising the steps of:

changing the polarization properties reversibly by using a polarization control element which has a polarization control film incorporating an oriented dichroic dyes in which light absorption spectrum of the molecule is changed by receiving and releasing charge and a charge supply means,

wherein the step of changing the polarization properties includes the step of;

controlling charge supply from charge supply means to the dichroic dyes is controlled.

20. The method for controlling polarization properties of claim 19, wherein a method for controlling the charge supply to the dichroic dyes includes the steps of controlling a voltage so as to reversibly change states between a state in which the polarization control film has polarization properties in a colored state and a state in which the above polarization control film has no polarization property in a non-colored state.

21. A method for controlling polarization properties comprising the steps of:

changing the polarization properties reversibly by using a retardation plate, an ellipse polarization plate having a polarization control film containing the oriented dichroic dyes, light absorption spectrum of the molecule of which is changed by receiving and releasing charge, and a charge supplying device,

wherein the steps of polarization properties includes the step of;

controlling the charge supplied from the supplying device to the dichroic dye so as to change polarization properties of the polarization plate.