Electro-optical device and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9213207-B2
Application number	US-201113083933-A
Country	US
Kind code	B2
Filing date	Apr 11, 2011
Priority date	Apr 12, 2010
Publication date	Dec 15, 2015
Grant date	Dec 15, 2015

Abstract

In at least one embodiment of the disclosure, an electro-optical device comprises a pixel electrode and a transistor corresponding to the pixel electrode. A data line is electrically connected to the transistor. A storage capacitor is provided between the pixel electrode and the transistor. The storage capacitor has a first capacitance electrode and a second capacitance electrode facing each other. A capacitance isolation film is interposed therebetween. An additional capacitor is electrically connected to the data line. The additional capacitor has a first additional capacitance electrode and a second additional capacitance electrode facing each other. An additional capacitance isolation film is interposed therebetween. The first additional capacitance electrode is provided on a same layer as the first capacitance electrode. The second additional capacitance electrode is provided on a layer different from the layers of the first and second capacitance electrodes.

First claim

What is claimed is:

1. An electro-optical device comprising:
a substrate including:
a pixel unit provided in a display area and comprising:
a pixel electrode,
a transistor corresponding to the pixel electrode,
a data line electrically connected to the transistor, and
a storage capacitor provided between the pixel electrode and the transistor, the storage capacitor having a first capacitance electrode and a second capacitance electrode disposed so as to face each other with a capacitance isolation film interposed therebetween; and

an additional capacitor provided in a peripheral area located between the display area and one side edge of the substrate, when viewed in plan view;

wherein
the additional capacitor is electrically connected to the data line and comprises a first additional capacitance electrode and a second additional capacitance electrode disposed so as to face each other with an additional capacitance isolation film interposed therebetween,
the first additional capacitance electrode is provided, in the peripheral area, on a same layer as the first capacitance electrode provided in the display area,
the second additional capacitance electrode is provided, in the peripheral area, on a layer different from the layers of the first capacitance electrode and second capacitance electrode in the display area, and
the first additional capacitance electrode is disposed so as to overlap with the second additional capacitance electrode in plan view.

2. The electro-optical device according to claim 1 , wherein the first capacitance electrode and second capacitance electrode are patterned to be formed with a same area in plan view.

3. The electro-optical device according to claim 1 , wherein the additional capacitor further comprises:
a third additional capacitance electrode which is formed on a same layer as the second capacitance electrode,
wherein the first additional capacitance electrode and the third additional capacitance electrode are disposed to face each other with another capacitance isolation film interposed therebetween.

4. The electro-optical device according to claim 3 ,
wherein the first capacitance electrode is electrically connected to the pixel electrode and the transistor, and
wherein the second additional capacitance electrode is electrically connected to a constant potential interconnection supplying a constant potential.

5. The electro-optical device according to claim 3 ,
wherein the first capacitance electrode is electrically connected to a constant potential interconnection supplying a constant potential, and
wherein the second capacitance electrode is electrically connected to the pixel electrode and the transistor.

6. The electro-optical device according to claim 1 , wherein the first additional capacitance electrode is electrically connected to an electrode provided on a same layer as that of the second capacitance electrode.

7. The electro-optical device according to claim 1 , further comprising:
data line blocks each including a plurality of data lines; and
an image signal supply unit which supplies an image signal to each of the data line blocks,
wherein a capacitance of the additional capacitor electrically connected to the data lines located at an end of each of the data line blocks is smaller than a capacitance of the additional capacitor electrically connected to other data lines of each of the data line blocks.

8. An electronic apparatus comprising the electro-optical device according to claim 1 .

9. The electro-optical device according to claim 1 , wherein an end surface of the first additional capacitance electrode and a corresponding end surface of the second additional capacitance electrode are not evenly aligned.

10. The electro-optical device according to claim 1 , wherein the second capacitance electrode is disposed between the first capacitance electrode and the transistor.

11. The electro-optical device according to claim 1 , wherein
the substrate further includes an inspection circuit, and
the additional capacitor is further electrically connected to the inspection circuit.

Assignees

• Moriwaki Minoru
• Mochizuki Hiroaki
• Seiko Epson Corp

Inventors

• Moriwaki Minoru
• Mochizuki Hiroaki

Classifications

• G02F1/136227

  Through-hole connection of the pixel electrode to the active element through an insulation layer · CPC title

• G02F1/136213 Primary

  Storage capacitors associated with the pixel electrode · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title