Method of manufacturing organic light emitting diode display panel having polymer network liquid crystal

Patent metadata

Field	Value
Publication number	US-10141382-B2
Application number	US-201715499754-A
Country	US
Kind code	B2
Filing date	Apr 27, 2017
Priority date	Jan 6, 2014
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A method of manufacturing an organic light emitting diode display panel, including forming a lower substrate, the lower substrate including a first area and a second area; forming an organic light emitting device on the lower substrate; disposing a polymer network liquid crystal on the organic light emitting device; forming a second optical layer in the second area, the second optical layer including the polymer network liquid crystal; and varying an optical property of the polymer network liquid crystal so as to form a first optical layer in the first area. The optical property of the polymer network liquid crystal in the first optical layer differs from the optical property of the polymer network liquid crystal in the second optical layer.

First claim

What is claimed is:

1. A method of manufacturing an organic light emitting diode display panel, comprising:
forming a lower substrate, the lower substrate comprising a first area and a second area;
forming an organic light emitting device on the lower substrate;
disposing a polymer network liquid crystal on the organic light emitting device;
forming a second optical layer in the second area, the second optical layer comprising the polymer network liquid crystal; and
varying an optical property of the polymer network liquid crystal so as to form a first optical layer in the first area in which the first optical layer has a first refractive index different than a second refractive index of the second optical layer.

2. The method of claim 1 , wherein the forming of the first optical layer comprises curing the polymer network liquid crystal of the first area to form a sheared polymer network liquid crystal.

3. The method of claim 2 , wherein the curing of the polymer network liquid crystal comprises radiating ultraviolet light to the polymer network liquid crystal of the first area.

4. The method of claim 3 , wherein the radiating of the ultraviolet light comprises shadow masking the second area.

5. The method of claim 4 , further comprising disposing an upper substrate on the polymer network liquid crystal, the upper substrate comprising a black matrix facing the second area,
wherein the shadow masking of the second area is performed using the black matrix.

6. The method of claim 4 , wherein the shadow masking of the second area comprises:
aligning an exposure mask comprising the light blocking material on the polymer network liquid crystal to face the second area;
exposing the polymer network liquid crystal using the exposure mask; and
removing the exposure mask.

7. The method of claim 4 , wherein an intensity of the ultraviolet light decreases as a distance from a center portion of the first area increases.

8. The method of claim 1 , wherein the forming of the first optical layer comprises forming an aligned polymer network liquid crystal in the first area, the forming of the aligned polymer network liquid crystal comprising:
applying an electric field to the polymer network liquid crystal facing the first area; and
radiating the ultraviolet light onto at least the first area.

9. The method of claim 8 , further comprising forming an opposite electrode under the polymer network liquid crystal, wherein the applying of the electric field comprises:
aligning an alignment substrate comprising an alignment electrode opposing the opposite electrode on the polymer network liquid crystal; and
applying voltages to the alignment electrode and the opposite electrode, respectively, to apply the electric field to the polymer network liquid crystal.

10. The method of claim 9 , further comprising:
removing the alignment substrate; and
disposing the upper substrate on the first and second optical layers.

11. The method of claim 8 , further comprising:
forming an opposite electrode under the polymer network liquid crystal;
forming an upper substrate comprising an alignment electrode facing the opposite electrode; and
disposing the upper substrate on the polymer network liquid crystal,
wherein the applying of the electric field comprises applying voltages to the alignment electrode and the opposite electrode, respectively, to apply the electric field to the polymer network liquid crystal.

Assignees

• Samsung Display Co Ltd

Inventors

• Choi Jinwoo
• Bae Jongsung
• Lim Jaeik
• Park Wonsang

Classifications

• G02F2201/44

  Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers · CPC title

• G02F1/133603

  with LEDs · CPC title

• G02F1/1334

  based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals · 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

• G02B5/0278

  used in transmission · CPC title