Electro-optical apparatus and electronic device

• US 10,394,031 B2
• Filed: 11/26/2018
• Issued: 08/27/2019
• Est. Priority Date: 12/25/2014
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Koshihara, Takeshi
• Primary Examiner(s): Quarterman, Kevin
• Application Number:
  US16/199,901
• Publication Number:
  US 20190094556A1
• Time in Patent Office: 274 Days
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 30/22 of the stereoscopic type
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/80518 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 59/876 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/878 comprising reflective means

Abstract

There is provided an electro-optical apparatus including an element substrate that includes a display region in which a plurality of pixels, which are light-emitting elements, are arranged in a matrix form. The light-emitting element has a structure in which a reflective electrode, a protective layer, an optical path adjustment layer, a first electrode, a light-emitting layer, and a second electrode are laminated on an insulation layer. The reflective electrode is disposed by being split in each pixel, and a gap is formed between each reflective electrode that is disposed by being split in each pixel. The protective layer covers the surface of the reflective electrode on which the gap is formed, and includes an embedded insulation film which is embedded in the gap.

Claims

1. An electro-optical apparatus comprising:

a first transistor;

a first reflective electrode electrically connected to the first transistor;

a first pixel electrode electrically connected to the first reflective electrode;

a second transistor;

a second reflective electrode electrically connected to the second transistor;

a second pixel electrode electrically connected to the second reflective electrode;

a protective layer that covers a surface of the first reflective electrode and a surface of the second reflective electrode and that includes an embedded insulation between the first reflective electrode and the second reflective electrode;

an optical path adjustment layer disposed between the second reflective electrode and the second pixel electrode;

a counter electrode;

an organic light emitting layer disposed between the first pixel electrode and the counter electrode and disposed between the second pixel electrode and the counter electrode,

wherein the optical path adjustment layer and the protective layer are formed of insulating material.

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

a first contact electrode, the first reflective electrode being electrically connected to the first pixel electrode via the first contact electrode;

a second contact electrode, the second reflective electrode being electrically connected to the second pixel electrode via the second contact electrode.

3. The electro-optical apparatus according to claim 2, the protective layer further comprising:

a first insulation film which is provided between the second reflective electrode and the embedded insulation film; and

a second insulation film which is provided on the first insulation film and the embedded insulation film,

wherein the optical path adjustment layer having an end section positioned on a surface of the second insulation film.

4. The electro-optical apparatus according to claim 3,

wherein the second insulation film contains silicon nitride, and

the optical path adjustment layer contains silicon oxide.

5. The electro-optical apparatus according to claim 3,

wherein the end section the optical path adjustment layer is positioned above the embedded insulation film.

6. The electro-optical apparatus according to claim 1,

wherein a contact hole is formed which passes through the optical path adjustment layer and the protective layer, and

the second contact electrode has a first contact section which is connected to the second reflective electrode in a state of being embedded in the contact hole, and a second contact section which is connected to the second pixel electrode in a state of being disposed on a surface of the protective layer.

7. The electro-optical apparatus according to claim 6,

wherein an end section of the optical path adjustment layer is positioned on a surface of the second contact section.

8. The electro-optical apparatus according to claim 1,

wherein a reflection enhancing layer is disposed on the surface of the first reflective electrode and the surface of the second reflective electrode.

9. An electronic device comprising:

the electro-optical apparatus according to claim 1.

10. An electro-optical apparatus having a first pixel and a second pixel, the electro-optical apparatus comprising:

a substrate;

a counter electrode;

a light-emitting layer disposed between the counter electrode and the substrate;

a protective layer disposed between the light-emitting layer and the substrate;

a first reflective electrode disposed between the protective layer and the substrate in the first pixel;

a first pixel electrode disposed between the light-emitting layer and the first reflective electrode in the first pixel;

a second reflective electrode disposed between the protective layer and the substrate in the second pixel, the surface of the first reflective electrode and second reflective electrode being covered by the protective layer;

a second pixel electrode disposed between the light-emitting layer and the first reflective electrode in the second pixel;

an optical path adjustment layer disposed between the second reflective electrode and the second pixel electrode;

an embedded insulation film disposed between the first reflective electrode and second reflective electrode,

wherein the optical path adjustment layer and the protective layer are formed of insulating material.

11. The electro-optical apparatus according to claim 10,

wherein the embedded insulation film is disposed between the protective layer and at least part of the optical path adjustment layer.

12. The electro-optical apparatus according to claim 10,

wherein an end section of at least a portion of the optical path adjustment layer is positioned above the embedded insulation film.

13. An electronic device comprising:

the electro-optical apparatus according to claim 10.