OLED with upconversion layer

Patent metadata

Field	Value
Publication number	US-10608053-B2
Application number	US-201615092342-A
Country	US
Kind code	B2
Filing date	Apr 6, 2016
Priority date	Aug 3, 2015
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

The present disclosure provides an OLED display apparatus and a method for producing the same, and a color filter substrate and a method for producing the same. The OLED display apparatus comprises: a TFT array substrate; a luminescent structure layer provided on the TFT array substrate, wherein light emitted from the luminescent structure layer is infrared light; and a light conversion layer located on the luminescent structure layer. The light conversion layer comprises a plurality of pixel areas, each of which is at least provided with three light conversion units, which are a red light conversion unit formed of an upconversion luminescent material emitting red light after stimulation by infrared light, a green light conversion unit formed of an upconversion luminescent material emitting green light after stimulation by infrared light, and a blue light conversion unit formed of an upconversion luminescent material emitting blue light after stimulation by infrared light.

First claim

What is claimed is:

1. An OLED display apparatus, comprising:
a TFT array substrate;
a luminescent structure layer provided on said TFT array substrate, wherein light emitted from said luminescent structure layer is infrared light; and
a light conversion layer located above said luminescent structure layer, wherein said light conversion layer comprises a plurality of pixel areas, each of which is at least provided with three light conversion units, which are a red light conversion unit, a green light conversion unit, and a blue light conversion unit; and
the red light conversion unit is formed of an upconversion photoluminescent material capable of exhibiting anti-Stokes effect and emitting red light after stimulation by infrared light;
the green light conversion unit is formed of an upconversion photoluminescent material capable of exhibiting anti-Stokes effect and emitting green light after stimulation by infrared light; and
the blue light conversion unit is formed of an upconversion photoluminescent material capable of exhibiting anti-Stokes effect and emitting blue light after stimulation by infrared light,
wherein all of the upconversion photoluminescent materials capable of exhibiting anti-Stokes effect, which form said red light conversion unit, said green light conversion unit, and said blue light conversion unit, are upconversion nanoparticles.

2. The OLED display apparatus according to claim 1 , wherein said light conversion layer further comprises a black matrix, wherein said black matrix defines the areas where each of the light conversion units is located, and is used for separating the light conversion units from each other.

3. The OLED display apparatus according to claim 2 , wherein said OLED display apparatus further comprises:
a protective layer located between said light conversion layer and said luminescent structure layer; and
a base substrate located on a side of said light conversion layer opposite to said luminescent structure layer.

4. The OLED display apparatus according to claim 1 , wherein said upconversion photoluminescent material capable of exhibiting anti-Stokes effect and emitting red light after stimulation by the infrared light emitted from the luminescent structure layer is an upconversion photoluminescent material capable of exhibiting anti-Stokes effect, which is formed by sintering with NaF as a base material, Y 3+ , Yb 3+ , and Ce 3+ as doping materials, and glycine as a sintering agent.

5. The OLED display apparatus according to claim 1 , wherein said upconversion photoluminescent material capable of exhibiting anti-Stokes effect and emitting green light after stimulation by the infrared light emitted from the luminescent structure layer is an upconversion photoluminescent material capable of exhibiting anti-Stokes effect, which is formed by sintering with NaF as a base material, Y 3+ , Yb 3+ , and Ho 3+ as doping materials, and citric acid as a sintering agent.

6. The OLED display apparatus according to claim 1 , wherein said upconversion photoluminescent material capable of exhibiting anti-Stokes effect and emitting blue light after stimulation by the infrared light emitted from the luminescent structure layer is an upconversion photoluminescent material capable of exhibiting anti-Stokes effect, which is formed by sintering with NaF as a base material, Y 3+ , Yb 3+ , and Tm 3+ as doping materials, and urea as a sintering agent.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Yingyi

Classifications

• G02B5/201

  in the form of arrays · CPC title

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• H01L2251/5369

  Electricity · mapped topic

• C09K11/7773 Primary

  with alkali or alkaline earth metal · CPC title

• H01L27/322 Primary

  Electricity · mapped topic