Organic electroluminescence display device

Patent metadata

Field	Value
Publication number	US-9450208-B2
Application number	US-201414318885-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Jul 3, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

An organic electroluminescence display device according to the invention includes a TFT substrate, a retroreflective body formed on the TFT substrate so as to correspond to each of pixels, a plurality of organic electroluminescence elements formed on the retroreflective bodies so as to correspond to the pixels, and a pixel separation film adapted to section the pixels, and the pixel separation film is formed in an area corresponding to an area between a boundary between the pixels adjacent to each other and an outer periphery of the retroreflective body.

First claim

What is claimed is:

1. An organic electroluminescence display device comprising:
a plurality of pixels each including a lower electrode, a light emitting layer, and an upper electrode;
a plurality of retroreflective bodies separated from each other, each of the retroreflective bodies located in each of the pixels and facing the lower electrode;
an insulation layer lying between each of the retroreflective bodies and the lower electrode; and
a pixel separation film adapted to section the pixels,
wherein the lower electrode is located between the light emitting layer and each of the retroreflective bodies, and the pixel separation film is formed in an area corresponding to an area between a boundary between the pixels adjacent to each other and an outer periphery of each of the retroreflective bodies.

2. The organic electroluminescence display device according to claim 1 , wherein
each of the retroreflective bodies is formed of a plurality of retroreflective structures, each having an equilateral-triangular planar shape, and adjacent to each other.

3. The organic electroluminescence display device according to claim 2 , wherein
each of the retroreflective bodies is constituted by the plurality of retroreflective structures different in planar size from each other.

4. The organic electroluminescence display device according to claim 1 , further comprising:
a thin film transistor formed below the each of the retroreflective bodies so as to correspond to each of the pixels; and
a contact hole adapted to connect the thin film transistor and the light emitting layer to each other and formed so as to correspond to each of the pixels,
wherein the contact hole is formed inside the pixel separation film in a planar view.

5. The organic electroluminescence display device according to claim 1 , wherein a plurality of pixel sets, each formed of a plurality of pixels different in planar shape from each other, is formed.

6. The organic electroluminescence display device according to claim 1 , wherein
each of the retroreflective bodies has a hexagonal planar shape.

7. The organic electroluminescence display device according to claim 1 , wherein
each of the retroreflective bodies is formed using a nanoimprint process.

8. The organic electroluminescence display device according to claim 1 , wherein
the retroreflective bodies are portions of a layer formed of a material high in optical reflectance,
the layer includes a flat portion with no retroreflective property, next to the outer periphery of the retroreflective bodies, and
the pixel separation film sits above the flat portion.

9. An organic electroluminescence display device comprising:
a retroreflective body formed so as to correspond to each of pixels;
a plurality of organic electroluminescence elements formed on the retroreflective bodies so as to correspond to the pixels;
a pixel separation film adapted to section the pixels,
a thin film transistor formed below the retroreflective body so as to correspond to each of the pixels; and
contact holes, wherein each of the contact holes is adapted to connect the thin film transistor and the organic electroluminescence element to each other and formed so as to correspond to each of the pixels,
wherein the pixel separation film is formed in an area corresponding to an area between a boundary between the pixels adjacent to each other and an outer periphery of the retroreflective body,
each of the contact holes is formed inside the pixel separation film in a planar view,
the pixel separation film includes pedestal base sections, each of which is a part projecting from the boundary toward a center of the pixel in the planar view, so as to correspond respectively to the pixels,
each of the contact holes is located in the pedestal base section in the planar view, and
two or more of the contact holes are arranged so as to be adjacent to each other across the boundary in the planar view to thereby form a pedestal section having a plurality of the pedestal base sections adjacent to each other across the boundary.

Assignees

• Japan Display Inc

Inventors

• Sato Toshihiro

Classifications

• H10K50/856

  comprising reflective means · CPC title

• H10K59/878 Primary

  comprising reflective means · CPC title

• H01L51/5271 Primary

  Electricity · mapped topic

• H01L27/3218

  Electricity · mapped topic

• H10K59/353

  characterised by the geometrical arrangement of the RGB subpixels · CPC title