Display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11029544-B2
Application number	US-201715648997-A
Country	US
Kind code	B2
Filing date	Jul 13, 2017
Priority date	Oct 14, 2016
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A display device including a first substrate, a pixel disposed on the first substrate and including first, second and third sub-pixel electrodes adjacent to each other, a second substrate spaced from the first substrate, a color conversion layer disposed on the second substrate and with a first wavelength conversion layer overlapping with the first sub pixel electrode and a second wavelength conversion layer overlapping with the second sub pixel electrode, a transmissive layer including a first sub-transmissive layer overlapping with the third sub-pixel electrode and a second sub-transmissive layer disposed between the first wavelength conversion layer and the second wavelength conversion layer, and a planarization layer disposed on the color conversion layer and the transmissive layer. Methods of manufacturing display devices having a flatter, planarization layer with reduced variations in thickness also is disclosed.

First claim

What is claimed is:

1. A display device comprising:
a first substrate;
a pixel disposed on the first substrate and including first, second and third sub-pixel electrodes adjacent to each other;
a second substrate spaced from the first substrate;
a color conversion layer disposed on the second substrate, the color conversion layer including a first wavelength conversion layer overlapping with the first sub pixel electrode and a second wavelength conversion layer overlapping with the second sub pixel electrode;
an inorganic layer disposed on the color conversion layer;
a transmissive layer disposed on the inorganic layer, the transmissive layer including a first sub-transmissive layer overlapping with the third sub-pixel electrode and a second sub-transmissive layer disposed between the first wavelength conversion layer and the second wavelength conversion layer; and
a planarization layer disposed on the color conversion layer and the transmissive layer,
wherein:
the first wavelength conversion layer, the second wavelength conversion layer, the first sub-transmissive layer, and the second sub-transmissive layer are disposed between the second substrate and the planarization layer;
the first sub-transmissive layer and the second sub-transmissive layer directly contact the planarization layer; and
the first wavelength conversion layer, the second wavelength conversion layer, the first sub-transmissive layer, and the second sub-transmissive layer directly contact the inorganic layer.

2. The display device according to claim 1 , wherein:
the first wavelength conversion layer and the second wavelength conversion layer comprise quantum dots or phosphor
each of the first sub-transmissive layer and the second sub-transmissive layer includes a light-transmitting resin and scattering particles.

3. The display device according to claim 1 , wherein the first wavelength conversion layer is configured to receive a light of a first wavelength range and to convert the light of the first wavelength range into a light of a second wavelength range different from the first wavelength range, and
wherein the second wavelength conversion layer is configured to receive the light of the first wavelength range and to convert the light of the first wavelength range into a light of a third wavelength range different from the second wavelength range.

4. The display device according to claim 3 , wherein the transmissive layer is configured to transmit the light of the first wavelength range.

5. The display device according to claim 3 , further comprising:
a first filter configured to block the light of the first wavelength range and to transmit the light of the second wavelength range and the light of the third wavelength range,
wherein the first filter overlaps with the color conversion layer.

6. The display device according to claim 1 , wherein the planarization layer comprises a first surface facing the first substrate and a second surface opposed to the first surface of the planarization layer, and
wherein variations in heights along the first surface of the planarization layer range from about 0 to about 40 nm.

7. The display device according to claim 1 , further comprising: a polarizing layer disposed on the planarization layer.

8. The display device of claim 7 , wherein the polarizing layer is a wire grid polarizer.

Assignees

• Samsung Display Co Ltd

Inventors

• Jung Jin Soo
• Kim Young Gu
• Lee Taek Joon
• Jang Hye Lim
• Jeon Baek Kyun

Classifications

• G02F2203/055

  wavelength filtering · CPC title

• G02F1/133548

  Wire-grid polarisers · CPC title

• G02F2001/1635

  the pixel comprises active switching elements, e.g. TFT · CPC title

• G02F1/133357

  Planarisation layers · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title