Electrochromic device, optical filter, lens unit, and imaging apparatus

Patent metadata

Field	Value
Publication number	US-2016299401-A1
Application number	US-201415102248-A
Country	US
Kind code	A1
Filing date	Dec 8, 2014
Priority date	Dec 13, 2013
Publication date	Oct 13, 2016
Grant date	—

Abstract

The present invention provides an electrochromic device including a pair of electrodes and an electrochromic layer disposed between the pair of electrodes and containing different electrochromic materials having the same polarity, wherein in the case where two materials are selected from the different electrochromic materials having the same polarity in descending order of maximum absorbance in a color-display mode of the electrochromic layer and where the diffusion coefficients of the molecules of the two materials are compared with each other in the color-display mode, a smaller diffusion coefficient D 2 min, a larger diffusion coefficient D 2 max, and maximum absorbance H 2 of the molecules of the electrochromic material having the diffusion coefficient D 2 max in the color-display mode satisfy Formula (5).
1≦ D 2 max/ D 2 min≦(1+0.146/H 2 ) 2   (5)

First claim

1 . An electrochromic device comprising:
a pair of electrodes; and an electrochromic layer disposed between the pair of electrodes and containing different electrochromic materials having the same polarity, wherein in the case where two materials are selected from the different electrochromic materials having the same polarity in descending order of maximum absorbance in a color-display mode of the electrochromic layer and where the diffusion coefficients of the molecules of the two materials are compared with each other in the color-display mode, a smaller diffusion coefficient D 2 min, a larger diffusion coefficient D 2 max, and maximum absorbance H 2 of the molecules of the electrochromic material having the diffusion coefficient D 2 max in the color-display mode satisfy Formula (5).
1 ≦D 2 max/ D 2 min≦(1+0.146/H 2 ) 2   (5)

2 . An electrochromic device comprising:
a pair of electrodes; and an electrochromic layer disposed between the pair of electrodes and containing different electrochromic materials having the same polarity, wherein in the case where three materials are selected from the different electrochromic materials having the same polarity in descending order of maximum absorbance in a color-display mode of the electrochromic layer and where the diffusion coefficients of the molecules of the three materials are compared with each other in the color-display mode, a smallest diffusion coefficient D 3 min, a largest diffusion coefficient D 3 max, and maximum absorbance H 3 of the molecules of the electrochromic material having the diffusion coefficient D 3 max in the color-display mode satisfy Formula (5a).
1 ≦D 3 max/ D 3 min≦(1+0.146/H 3 ) 2   (5a)

3 . An electrochromic device comprising:
a pair of electrodes; and an electrochromic layer disposed between the pair of electrodes and containing different electrochromic materials having the same polarity, wherein in the case where a material of which the molecules have the largest maximum absorbance and any one of materials of which the molecules have maximum absorbance that is at least one-tenth of the maximum absorbance of the molecules having the largest maximum absorbance are selected from the different electrochromic materials having the same polarity in a color-display mode of the electrochromic layer and where the diffusion coefficients of the molecules of the selected materials are compared with each other in the color-display mode, a smaller diffusion coefficient D N min, a larger diffusion coefficient D N max, and maximum absorbance H N of the molecules of the electrochromic material having the diffusion coefficient D N max in the color-display mode satisfy Formula (5b).
1 ≦D N max/ D N min≦(1+0.146/H N ) 2   (5b)

4 . The electrochromic device according to claim 1 , wherein the diffusion coefficient D 2 min is equal to the diffusion coefficient D 2 max.

5 . The electrochromic device according to claim 2 , wherein the diffusion coefficient D 3 min is equal to the diffusion coefficient D 3 max.

6 . The electrochromic device according to claim 3 , wherein the diffusion coefficient D N min is equal to the diffusion coefficient D N max.

7 . The electrochromic device according to claim 1 , wherein the diffusion coefficient D 2 min, the diffusion coefficient D 2 max and the maximum absorbance H 2 satisfy Formula (15).
1 ≦D 2 max/ D 2 min≦(1+0.0792/H 2 ) 2   (15)

8 . The electrochromic device according to claim 2 , wherein the diffusion coefficient D 3 min, the diffusion coefficient D 3 max and the maximum absorbance H 3 satisfy Formula (15a).
1 ≦D 3 max/ D 3 min≦(1+0.0792/H 3 ) 2   (15a)

9 . The electrochromic device according to claim 3 , wherein the diffusion coefficient D N min, the diffusion coefficient D N max and the maximum absorbance H N satisfy Formula (15b).
1 ≦D N max/ D N min≦(1+0.0792/H N ) 2   (15b)

10 . The electrochromic device according to claim 1 , wherein
the diffusion coefficient D 2 min and the diffusion coefficient D 2 max satisfy Formula (17).
1≦ D 2 max/ D 2 min≦1.29  (17)

11 . The electrochromic device according to claim 2 , wherein
diffusion coefficient D 3 min and the diffusion coefficient D 3 max satisfy Formula (17a).
1≦ D 3 max/ D 3 min≦1.29  (17a)

12 . The electrochromic device according to claim 3 , wherein
the diffusion coefficient D N min and the diffusion coefficient D N max satisfy Formula (17b).
1≦ D N max/ D N min≦1.29  (17b)

13 . The electrochromic device according to claim 10 , wherein the diffusion coefficient D 2 min and the diffusion coefficient D 2 max satisfy Formula (18).
1≦ D 2 max/ D 2 min≦1.15  (18)

14 . The electrochromic device according to claim 11 , wherein the diffusion coefficient D 3 min and the diffusion coefficient D 3 max satisfy Formula (18a).
1≦ D 3 max/ D 3 min≦1.15  (18a)

15 . The electrochromic device according to claim 12 , wherein the diffusion coefficient D N min and the diffusion coefficient D N max satisfy Formula (18b).
1≦ D N max/ D N min≦1.15  (18b)

16 . The electrochromic device according to claim 1 , wherein each of the different electrochromic materials having the same polarity is any of a monothiophene derivative, an oligothiophene derivative, an aromatic amine derivative, and a pyridine derivative.

17 . The electrochromic device according to claim 1 , wherein the distance between the pair of electrodes is in the range of 0.6 μm to 130 μm.

18 . An optical filter comprising:
the electrochromic device according to claim 1 ; and a transistor configured to control the electrochromic device.

19 . A lens unit comprising:
the electrochromic device according to claim 1 ; and a plurality of lenses.

20 . An imaging apparatus comprising:
an optical imaging system; an image sensor configured to receive light from the optical imaging system; the electrochromic device according to claim 1 ; and a transistor configured to control the electrochromic device, wherein the electrochromic device is being disposed in an optical path

Assignees

• Canon Kk

Inventors

• Kubo Wataru
• Okada Shinjiro
• Yamada Kenji

Classifications

• G02F1/1516

  comprising organic material · CPC title

• H04N23/75

  by influencing optical camera components · CPC title

• G02F1/157

  Structural association of cells with optical devices, e.g. reflectors or illuminating devices · CPC title

• G02F1/1503 Primary

  caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions · CPC title

• G02F2001/1635

  the pixel comprises active switching elements, e.g. TFT · CPC title