Organic light-emitting display apparatus

Patent metadata

Field	Value
Publication number	US-2016233274-A1
Application number	US-201514823925-A
Country	US
Kind code	A1
Filing date	Aug 11, 2015
Priority date	Feb 5, 2015
Publication date	Aug 11, 2016
Grant date	—

Abstract

An organic light-emitting display apparatus includes: a display substrate; at least one thin film transistor (TFT) on the display substrate; an organic light-emitting diode (OLED) electrically connected to the TFT, the OLED including: a first electrode on each sub-pixel on the display substrate; an intermediate layer on the first electrode; and a second electrode on the intermediate layer; an encapsulation substrate covering the OLED; a filler filling a space between the display substrate and the encapsulation substrate, the filler including scatterers having optical anisotropy; and a color filter between the encapsulation substrate and the filler, the color filter including a color filter electrode at a surface of the color filter.

First claim

What is claimed is:

1 . An organic light-emitting display apparatus comprising:
a display substrate; at least one thin film transistor (TFT) on the display substrate; an organic light-emitting diode (OLED) electrically connected to the TFT, the OLED comprising:
a first electrode on each sub-pixel on the display substrate;
an intermediate layer on the first electrode; and
a second electrode on the intermediate layer;
an encapsulation substrate covering the OLED; a filler filling a space between the display substrate and the encapsulation substrate, the filler comprising scatterers having optical anisotropy; and a color filter between the encapsulation substrate and the filler, the color filter comprising a color filter electrode at a surface of the color filter.

2 . The organic light-emitting display apparatus of claim 1 , wherein the scatterers are arranged in the filler, and a plurality of liquid crystals are in the scatterers.

3 . The organic light-emitting display apparatus of claim 2 , wherein the liquid crystals are arranged at random.

4 . The organic light-emitting display apparatus of claim 2 , wherein a refractive index in a z axial direction of a liquid crystal director is different from a refractive index of an xy plane at right angle to the liquid crystal director, and the refractive index of the xy plane is the same as a refractive index of the filler.

5 . The organic light-emitting display apparatus of claim 2 , wherein the scatterers have a spherical shape, an ellipsoidal shape, and/or a network shape.

6 . The organic light-emitting display apparatus of claim 2 , wherein the filler comprises an ultraviolet curable polymer.

7 . The organic light-emitting display apparatus of claim 6 , wherein the filler comprises acrylate-based pre-polymer, thiol-ene-based pre-polymer, and/or silicone-based pre-polymer.

8 . The organic light-emitting display apparatus of claim 2 , wherein the liquid crystals included in the scatterers comprise cyanobiphenyl-based mixtures, phenylcyclohexane and/or biphenylcyclohexane mixtures, or cyclohexane-fluorinated biphenyls and/or fluorinated terphenyls mixtures.

9 . The organic light-emitting display apparatus of claim 2 , wherein the organic light-emitting display apparatus is configured to operate in a non-scattering mode in which the liquid crystals are arranged in a direction parallel to an electric field when voltages are applied to the color filter electrode and the second electrode.

10 . The organic light-emitting display apparatus of claim 1 , wherein the color filter electrode is on the surface of the color filter facing the filler.

11 . The organic light-emitting display apparatus of claim 1 , wherein the color filter electrode comprises a transparent electrode.

12 . The organic light-emitting display apparatus of claim 1 , wherein the color filter electrode comprises a common electrode.

13 . The organic light-emitting display apparatus of claim 1 , wherein the intermediate layer comprises:
an emissive layer; and at least one pattern layer stacked on at least one surface of the emissive layer.

14 . The organic light-emitting display apparatus of claim 13 , wherein the at least one pattern layer comprises at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), or an electron injection layer (EIL).

15 . The organic light-emitting display apparatus of claim 13 , wherein the emissive layer and the pattern layer are in an emissive area of each sub-pixel.

16 . The organic light-emitting display apparatus of claim 13 ,
wherein the emissive layer is in an emissive area of each sub-pixel, and wherein the pattern layer extends over emissive areas of neighboring sub-pixels.

17 . The organic light-emitting display apparatus of claim 1 , wherein the second electrode comprises:
a common electrode on the intermediate layer in an emissive area of each sub-pixel; and a connection electrode configured to electrically connect the common electrodes to each other.

18 . The organic light-emitting display apparatus of claim 17 , wherein the connection electrode integrally extends over emissive areas of neighboring sub-pixels.

19 . The organic light-emitting display apparatus of claim 1 , wherein the second electrode comprises a transflective metal layer.

20 . The organic light-emitting display apparatus of claim 1 , wherein the second electrode integrally extends over emissive areas of neighboring sub-pixels.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Seongsik

Classifications

• H10K59/877

  comprising scattering means · CPC title

• H10K59/876

  comprising a resonant cavity structure, e.g. Bragg reflector pair · CPC title

• H10K59/80524

  Transparent cathodes, e.g. comprising thin metal layers · CPC title

• H01L51/5253

  Electricity · mapped topic

• H01L51/5088

  Electricity · mapped topic