Organic light emitting device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2016233273-A1
Application number	US-201514789206-A
Country	US
Kind code	A1
Filing date	Jul 1, 2015
Priority date	Feb 11, 2015
Publication date	Aug 11, 2016
Grant date	—

Abstract

An organic light emitting device includes a display panel including a plurality of pixels and a circular polarizing plate disposed opposite to the display panel, where the circular polarizing plate has a plurality of retardations corresponding to the pixels of the display panel. A method of manufacturing an organic light emitting device includes preparing a display panel including a plurality of pixels, preparing a circular polarizing plate having a plurality of retardations, and assembling the display panel and the circular polarizing plate, where the display panel and the circular polarizing plate are assembled so that the retardations of the circular polarizing plate respectively correspond to the pixels of the display panel.

First claim

What is claimed is:

1 . An organic light emitting device, comprising
a display panel comprising a plurality of pixels, and a circular polarizing plate disposed opposite to the display panel, wherein the circular polarizing plate has a plurality of retardations corresponding to the pixels of the display panel.

2 . The organic light emitting device of claim 1 , wherein a microcavity effect occurs in the pixels of the display panel.

3 . The organic light emitting device of claim 1 , wherein
the display panel comprises a first pixel, a second pixel, and a third pixel, wherein the first to third pixels display different colors from each other, and the circular polarizing plate comprises:
a compensation film including a first region corresponding to the first pixel and having a first retardation, a second region corresponding to the second pixel and having a second retardation, and a third region corresponding to the third pixel and having a third retardation; and
a polarizer.

4 . The organic light emitting device of claim 3 , wherein
the retardations of the compensation film satisfy the following relationship: R e1 >R e2 ≧R e3 ; or R e1 ≧R e2 >R e3 , wherein R e1 , R e2 and R e3 denote the first, second and third retardations, respectively.

5 . The organic light emitting device of claim 4 , wherein
the first retardation is in a range of about 125 nm to about 155 nm, the second retardation is in a range of about 110 nm to about 160 nm, and the third retardation is in a range of about 110 nm to about 125 nm.

6 . The organic light emitting device of claim 4 , wherein
the first retardation is in a range of about 135 nm to about 145 nm, the second retardation is in a range of about 130 nm to about 140 nm, and the third retardation is in a range of about 115 nm to about 125 nm.

7 . The organic light emitting device of claim 3 , wherein
the first pixel is a blue pixel, the second pixel is a green pixel, and the third pixel is a red pixel.

8 . The organic light emitting device of claim 3 , wherein the compensation film comprises a cured liquid crystal.

9 . The organic light emitting device of claim 3 , wherein a reflectance in each of the first pixel, the second pixel and the third pixel is less than or equal to about 5%.

10 . The organic light emitting device of claim 3 , wherein a reflection color shift (Δa*b*) in each of the first pixel, the second pixel and the third pixel is less than or equal to about 5.

11 . The organic light emitting device of claim 1 , wherein a reflection color shift (Δa*b*) of the organic light emitting device is less than or equal to about 5.

12 . The organic light emitting device of claim 3 , further comprising:
an encapsulation substrate disposed opposite to the display panel, the compensation film is attached to a first surface of the encapsulation substrate, and the polarizer is attached to a second surface of the encapsulation substrate, which is opposite to the first surface.

13 . A method of manufacturing an organic light emitting device, comprising:
preparing a display panel including a plurality of pixels; preparing a circular polarizing plate having a plurality of retardations; and assembling the display panel and the circular polarizing plate, wherein the display panel and the circular polarizing plate are assembled so that the retardations of the circular polarizing plate respectively correspond to the pixels of the display panel.

14 . The method of claim 13 , wherein
the display panel comprises a first pixel, a second pixel, and a third pixel, wherein the first to third pixels display different colors from each other, and the preparing the circular polarizing plate comprises:
preparing a compensation film including a first region having a first retardation, a second region having a second retardation, and a third region having a third retardation; and
preparing a polarizer,
wherein the first region, the second region and the third region of the compensation film correspond to the first pixel, the second pixel and the third pixel of the display panel, respectively.

15 . The method of claim 14 , wherein the preparing the compensation film comprises:
providing a liquid crystal layer for the compensation film on a first surface of a substrate, and curing the liquid crystal layer for the compensation film while changing a temperature to provide the first, second and third regions having different retardations from each other.

16 . The method of claim 15 , wherein the curing the liquid crystal layer for the compensation film comprises:
disposing a mask on the liquid crystal layer and performing a first exposure at a first temperature to provide the first region; disposing a mask on the liquid crystal layer and performing a second exposure at a second temperature to provide the second region; and performing a third exposure at a third temperature to provide the third region.

17 . The method of claim 16 , wherein
the second temperature is higher than the first temperature, and the third temperature is higher than the second temperature.

18 . The method of claim 15 , further comprising:
providing an alignment layer on the substrate before the providing the liquid crystal layer for the compensation film.

19 . The method of claim 15 , further comprising:
providing the polarizer on a second surface of the substrate, which is opposite to the first surface, wherein the substrate is an encapsulation substrate.

20 . The method of claim 14 , wherein
the retardations of the compensation film satisfy the following Relationship: R e1 >R e2 ≧R e3 ; or R e1 ≧R e2 >R e3 , wherein R e1 , R e2 and R e3 denote the first, second and third retardations, respectively.

21 . The method of claim 20 , wherein
the first retardation is in a range of about 125 nm to about 155 nm, the second retardation is in a range of about 110 nm to about 160 nm, and the third retardation is in a range of about 110 nm to about 125 nm.

22 . The method of claim 20 , wherein
the first retardation is in a range of about 135 nm to about 145 nm, the second retardation is in a range of about 130 nm to about 140 nm, and the third retardation is in a range of about 115 nm to about 125 nm.

23 . The method of claim 14 , wherein
the first pixel is a blue pixel, the second pixel is a green pixel, and the third pixel is a red pixel.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Ohyama Tsuyoshi
• Lee Eun Sung
• Hamamoto Nobuo

Classifications

• G02B5/3083

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title

• G02B5/3016

  involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528) · CPC title

• G02B5/3025 Primary

  Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state (G02B5/3008, G02B5/3016 take precedence) · CPC title

• G02B5/3008

  comprising dielectric particles, e.g. birefringent crystals embedded in a matrix · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title