IP Library Granted Patent US 7,214,960
Granted Patent B2
US 7,214,960 · App. 11/333,383 · Granted May 8, 2007

Electro-optical device and electronic apparatus

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Quick Facts
Patent No.
US 7,214,960
App. No.
11/333,383
Granted
May 8, 2007
Kind
B2
Abstract

An electro-optical device includes a plurality of pixels arranged on a substrate. Each of the pixels includes a plurality of EL light-emitting elements that are disposed on the substrate and are connected in series. Each of the EL light-emitting elements includes a first electrode, a luminescent layer, and a second electrode that are disposed in a thickness direction of the substrate, and each of the EL light-emitting elements has a characteristic of emitting light in response both to a forward applied voltage and to a reverse applied voltage. The first electrodes or the second electrodes of neighboring EL light-emitting elements of the plurality of EL light-emitting elements are coupled to each other, so that the plurality of EL light-emitting elements are connected in series.

Claims (12)

1. An electro-optical device comprising

a plurality of pixels arranged on a substrate, each of the pixels including a plurality of EL light-emitting elements that are disposed on the substrate and are connected in series, wherein:

each of the EL light-emitting elements includes a first electrode, a luminescent layer, and a second electrode that are disposed in a thickness direction of the substrate, and each of the EL light-emitting elements has a characteristic of emitting light in response both to a forward applied voltage and to a reverse applied voltage; and

the first electrodes or the second electrodes of neighboring EL light-emitting elements of the plurality of EL light-emitting elements are coupled to each other, so that the plurality of EL light-emitting elements are connected in series.

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

a plurality of common electrode interconnects disposed along a row direction or a column direction of the plurality of arranged pixels, wherein

the common electrode interconnect serves as the first electrode or the second electrode of the EL light-emitting element closest to an end of the pixel, of the plurality of serially connected EL light-emitting elements included in the pixel.

3. The electro-optical device according to claim 1 , wherein

the luminescent layer is formed of a multi-layered structure of a buffer layer, a luminescent body film, and a buffer layer.

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

the buffer layer includes polyethylenedioxythiophene (PEDOT).

5. An electronic apparatus comprising as a display unit the electro-optical device according to claim 1 .

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 15, 2018
From: SEIKO EPSON CORPORATION
To: 138 EAST LCD ADVANCEMENTS LIMITED
Reel/Frame 046153/0397 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 18, 2006
From: SANO, JUNICHI
To: SEIKO EPSON CORPORATION
Reel/Frame 017487/0503 →