IP Library › Granted Patent US 11,804,156
Granted Patent B2
US 11,804,156 · App. 17/938,945 · Granted Oct 31, 2023

Electro-optical device and electronic apparatus

Inventor: Shinsuke Fujikawa (Chino, JP)
Assignee: SEIKO EPSON CORPORATION
G09G3/006G09G3/3666G09G2320/041G09G2330/12
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Quick Facts
Patent No.
US 11,804,156
App. No.
17/938,945
Granted
Oct 31, 2023
Kind
B2
Abstract

A first substrate of an electro-optical device is provided with a temperature detection circuit including a temperature detection element, and a first wiring line and a second wiring line of the temperature detection element are electrically connected to a first terminal and a second terminal, respectively. Between the first terminal and the second terminal, a third terminal that is not electrically connected to the temperature detection element is provided. Thus, through detection of a current at the time of applying a ground potential from a first probe and a second probe of an inspection device to the first terminal and the second terminal and applying a predetermined voltage from a third probe to the third terminal, insulation between the first terminal and the second terminal can be inspected.

Claims (36)

1. An electro-optical device, comprising:

a temperature detection circuit including a temperature detection element;

a first terminal electrically connected to the temperature detection element;

a second terminal electrically connected to the temperature detection element; and

a third terminal provided between the first terminal and the second terminal, and not electrically connected to the temperature detection element.

2. The electro-optical device according to claim 1 , comprising

a fourth terminal provided so as to sandwich the first terminal or the second terminal with the third terminal, and not electrically connected to the temperature detection element.

3. The electro-optical device according to claim 2 , wherein

the third terminal and the fourth terminal are not electrically connected to each other.

4. The electro-optical device according to claim 3 , comprising:

a first electrode provided along a display region and electrically connected to the third terminal; and

a second electrode provided along the display region and electrically connected to the fourth terminal.

5. The electro-optical device according to claim 4 , wherein

the first electrode includes a first protruding portion, the first protruding portion being provided along the second electrode and protruding toward the second electrode, and

the second electrode includes a second protruding portion, the second protruding portion being provided along the first electrode and protruding toward the first electrode.

6. The electro-optical device according to claim 4 , wherein

different potentials are applied to the first electrode and the second electrode.

7. The electro-optical device according to claim 2 , wherein

the third terminal and the fourth terminal are electrically connected to each other.

8. The electro-optical device according to claim 1 , comprising

a first electrode provided along a display region and electrically connected to the third terminal.

9. The electro-optical device according to claim 1 , comprising:

a first inspection terminal electrically connected to the first terminal;

a second inspection terminal electrically connected to the second terminal; and

a third inspection terminal electrically connected to the third terminal.

10. The electro-optical device according to claim 1 , comprising:

a data line drive circuit;

a scanning line drive circuit;

a fifth terminal electrically connected to the data line drive circuit;

a sixth terminal electrically connected to the scanning line drive circuit; and

a short-circuit line electrically connected to the first terminal, the second terminal, the fifth terminal, and the sixth terminal, wherein

the third terminal is not electrically connected to the short-circuit line.

11. The electro-optical device according to claim 10 , wherein

each of the first terminal, the second terminal, the fifth terminal, and the sixth terminal is electrically connected to the short-circuit line via a resistor element.

12. An electronic apparatus comprising

the electro-optical device according to claim 1 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 13, 2022
From: FUJIKAWA, SHINSUKE
To: SEIKO EPSON CORPORATION
Reel/Frame 061067/0356 →
Priority Claims (1)
JP 2021-146818 · Sep 9, 2021 · national
Continuity (1)
Related Publication 20230074276A1 · Mar 9, 2023
Cited By (1)
US 12,361,905