# US 8,786,931 B2 · Electrochromic display

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- Number: US 8,786,931 B2
- Document ID: US8786931B2
- Status: Granted
- Kind: B2
- Application number: 13/802,643
- Filed: 2013-03-13
- Published: 2013-09-19
- Granted: 2014-07-22
- Earliest claimed: 2012-03-14
- Assignees: Stanley Electric Co., Ltd.
- Applicants: Stanley Electric Co., Ltd.
- Inventors: Hiroto Fukushima; Yoshihisa Iwamoto; Yasuo Toko
- Web page: https://patentgrep.com/patent/US8786931B2

## CPC

- G02F 1/155: Electrodes
- G02F 2001/1536: {additional, e.g. protective, layer inside the cell}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

There is provided an electrochromic display that includes a display substrate, which includes a display electrode on a first substrate and an insulating film on or above the display electrode; a counter substrate having a counter electrode on a second substrate, the counter substrate facing the display substrate; and a color-developing layer containing an electrochromic material disposed in a region surrounded by a sealing member between the display substrate and the counter substrate. The insulating film is disposed on or above the display electrode except for a display region of the display electrode in the region surrounded by the sealing member.

## Claims

### Claim 1

An electrochromic display, comprising:
a display substrate, which includes at least one display electrode on a first substrate and an insulating film;
a counter substrate having a counter electrode on a second substrate, the counter electrode facing the at least one display electrode with the insulating film disposed on at least a portion of the at least one display electrode; and
a color-developing layer containing an electrochromic material disposed in a region surrounded by a sealing member between the display substrate and the counter substrate,
wherein the insulating film has a predetermined shape such that a region where the insulating film is disposed is a non-display region of the at least one display electrode, and a region surrounded by the sealing member where the insulating film is not disposed is a display region of the at least one display electrode.

### Claim 2 (depends on 1)

The electrochromic display according to claim 1, wherein the insulating film covers an entire portion of the first substrate on which no display electrode is disposed in the region surrounded by the sealing member.

### Claim 3 (depends on 1)

The electrochromic display according to claim 1, wherein an area of the region surrounded by the sealing member where the insulating film is not disposed is more than 0% and at most 50% of a total area of the region surrounded by the sealing member.

### Claim 4 (depends on 1)

The electrochromic display according to claim 1, wherein:
the at least one display electrode comprises a plurality of display electrodes;
each of the plurality of display electrodes has a display region of a shape different from display regions of the other display electrodes;
the plurality of display electrodes are electrically independent from each other; and
each of the plurality of display electrodes performs static driving or duty driving.

### Claim 5 (depends on 1)

The electrochromic display according to claim 1, wherein another insulating film is disposed on a portion of the counter electrode in the region surrounded by the sealing member except a portion of the counter electrode facing the display region of the at least one display electrode.