IP Library › Granted Patent US 12687756
Granted Patent B2
US 12687756 · App. 18/648,890 · Granted Jul 21, 2026

Electrochromic device

Inventors: Yoshikazu Hashiba (Tokyo, JP); Keita Sasanuma (Tokyo, JP)
Assignee: Japan Display Inc.
G02F1/163
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Quick Facts
Patent No.
US 12687756
App. No.
18/648,890
Granted
Jul 21, 2026
Kind
B2
Abstract

According to an aspect, an electrochromic device, includes: two electrodes facing each other in a first direction with an electrochromic material therebetween; an operational amplifier circuit an output of which is coupled to one of the two electrodes; a first wiring line coupled to a positive power supply coupling part of the operational amplifier circuit; a second wiring line provided as a transmission line for the output; a first contact coupling the first wiring line to a light-transmissive conductor layer configured to transmit a positive power supply potential of the operational amplifier circuit; and a second contact coupling the second wiring line to the one electrode. A distance between the first contact and the second contact in a second direction is larger than a distance between a part of the first wiring line and a part of the second wiring line that are aligned in parallel in the second direction.

Claims (14)

1 . An electrochromic device, comprising:

two electrodes facing each other in a first direction with an electrochromic material interposed therebetween;

an operational amplifier circuit an output of which is coupled to one of the two electrodes;

a first wiring line coupled to a positive power supply coupling part of the operational amplifier circuit;

a second wiring line provided as a transmission line for the output;

a first contact coupling the first wiring line to a light-transmissive conductor layer that is stacked in the first direction on a first conductor layer with an insulating layer interposed therebetween and is configured to transmit a positive power supply potential of the operational amplifier circuit, the first conductor layer forming the first wiring line; and

a second contact coupling the second wiring line to the one electrode that is stacked in the first direction on a second conductor layer with an insulating layer interposed therebetween, the second conductor layer forming the second wiring line, wherein

a distance between the first contact and the second contact in a second direction is larger than a distance between a part of the first wiring line and a part of the second wiring line that are aligned in parallel in the second direction.

2 . The electrochromic device according to claim 1 , wherein

one of the first contact and the second contact is positioned on one side of the operational amplifier circuit in the second direction, and

the other one of the first contact and the second contact is not positioned on the one side of the operational amplifier circuit in the second direction.

3 . The electrochromic device according to claim 2 , wherein the distance in the second direction between the first contact and the second contact is 40 μm or more.

4 . The electrochromic device according to claim 1 , further comprising a third conductor layer that is stacked on the light-transmissive conductor layer in the first direction, has an electrical resistance lower than an electrical resistance of the light-transmissive conductor layer, and is configured to transmit the positive power supply potential.

5 . The electrochromic device according to claim 4 , wherein a part of a wiring line formed by the third conductor layer overlaps a part of the first wiring line in a plan view orthogonal to the first direction.