Display device

Patent metadata

Field	Value
Publication number	US-9897847-B2
Application number	US-201615171552-A
Country	US
Kind code	B2
Filing date	Jun 2, 2016
Priority date	Oct 6, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A display device includes a display member and a backlight unit, where the display member includes a base substrate, a cover layer that is on the base substrate, extends in a first direction, and includes a plurality of portions defining a first cavity and a second cavity that are spaced apart from the base substrate and adjacent to each other in the first direction, a first display element and a second display element that respectively correspond to the first cavity and the second cavity, a color conversion filter that is disposed on the cover layer, and includes a first filter which overlaps the first cavity and converts incident light into a first color light, and a second filter which overlaps the second cavity and converts incident light into a second color light, and an optical member which is disposed between the color conversion filter and the cover layer.

First claim

What is claimed is:

1. A display device, comprising:
a display member which displays images; and
a backlight unit which provides light to the display member,
wherein the display member comprises:
a base substrate;
a cover layer which is on the base substrate, extends in a first direction, and includes a plurality of portions which defines, a first cavity and a second cavity adjacent to each other in the first direction, the cover layer contacts the base substrate in some portions, is spaced apart from the base substrate in other portions to define each of the first cavity and the second cavity, and covers the cavity in the some portions spaced apart from the base substrate;
a first display element and a second display element disposed to respectively correspond to the first cavity and the second cavity;
a color conversion filter which is disposed on the cover layer, includes a first filter which overlaps the first cavity and converts a light incident on the first filter into a first color light having a first color, and a second filter which overlaps the second cavity and converts a light incident on the second filter into a second color light having a second color; and
an optical member which is disposed between the color conversion filter and the cover layer, and which selectively transmits or reflects a light incident on the optical member according to a color of the light incident on the optical member.

2. The display device of claim 1 , wherein:
the light provided by the backlight unit has a third color; and
the optical member reflects a light having the first color or the second color, and transmits a light having the third color.

3. The display device of claim 2 , wherein the light incident on the optical member comprises:
a first light which passes through the first cavity and the second cavity to be incident on the optical member among light provided by the backlight unit; and
a second light which is incident on the optical member among the first color light and the second color light.

4. The display device of claim 3 , wherein the first filter transmits a light having the first color among a light re-incident on the first filter reflected from the optical member, and
the second filter transmits a light having the second color among a light re-incident on the first filter reflected from the optical member.

5. The display device of claim 4 , wherein the color conversion filter further includes a third filter which converts a light incident on the third filter into a third color light having the third color, and transmits the third color light.

6. The display device of claim 2 , wherein the optical member comprises:
a polarizing layer having a predetermined transmission axis; and
a selective transmission/reflection layer which is disposed on the polarizing layer, reflects a light having the first color and a light having the second color and transmits a light having the third color among the light incident on the optical member.

7. The display device of claim 6 , further comprising a polarizing member disposed between the display member and the backlight unit, and having a transmission axis of which a direction is perpendicular to the predetermined transmission axis of the polarizing layer.

8. The display device of claim 6 , wherein the selective transmission/reflection layer comprises:
a plurality of first insulating layers, each of which has a first refractive index; and
a plurality of second insulating layers, each of which has a second refractive index which differs from the first refractive index,
wherein the plurality of first insulating layers and the plurality of second insulating layers are alternatingly stacked.

9. The display device of claim 8 , wherein a thickness of the selective transmission/reflection layer is equal to or less than about 10 micrometers.

10. The display device of claim 6 , wherein the selective transmission/reflection layer is a cholesteric liquid crystal film or a photonic crystal film, and
the polarizing layer comprises polyvinyl alcohol.

11. The display device of claim 1 , wherein the plurality of portions is each spaced apart from the base substrate, from one end to the other end of the each of the portions in a second direction crossing the first direction.

12. The display device of claim 11 , wherein each of the first cavity and second cavity has a tunnel shape extending in the second direction.

13. The display device of claim 12 , wherein:
a liquid crystal is filled in each of the first cavity and the second cavity; and
each of the first display element and the second display element defines a liquid crystal capacitor.

14. The display device of claim 13 , wherein the display member further comprises an alignment layer which is disposed on an inner surface of the cover layer, and provided in the first cavity and the second cavity.

15. The display device of claim 1 , wherein the color conversion filter includes a plurality of quantum dots.

16. The display device of claim 15 , wherein the plurality of quantum dots comprises:
a plurality of first particles which are included in the first filter; and
a plurality of second particles which are included in the second filter,
wherein a particle size of each of the plurality of first particles is different from a particle size of each of the plurality of second particles.

17. A display device, comprising:
a backlight unit which provides a single first color light having a single first color;
a panel member which receives the first color light and includes a plurality of pixels;
an optical member which is disposed on the panel member, reflects the first color light and transmits a second color light having a second color different from the first color; and
a color conversion filter disposed on the optical member and including a plurality of quantum dots,
wherein a plurality of cavities respectively corresponding to the pixels is defined in the panel member, and
wherein each of the plurality of cavities is filled with a liquid crystal.

18. The display device of claim 17 , wherein the optical member comprises:
a polarizing layer which transmits a light which oscillates in one direction;
a plurality of first insulating layers disposed on the polarizing layer and each having a first refractive index; and
a plurality of second insulating layers disposed on the polarizing layer and each having a second refractive index,
wherein the plurality of second insulating layers is alternatingly stacked with the plurality of first insulating layers.

19. The display device of claim 18 , wherein:
the plurality of cavities arranged in a matrix form; and
the color conversion filter includes a plurality of filters respectively corresponding to the plurality of cavities, and a black matrix disposed between the plurality of filters.

20. The display device of claim 19 , wherein the filters comprise:
a first filter including, among the plurality of quantum dots, quantum dots which receive the first color light to generate a light having the second color; and
a second filter which transmits the first color light.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Dong Uk
• Kim Youngmin
• Park Haeil
• Yoon Seon Tae
• Lee Junhan

Classifications

• G02F1/133528

  Polarisers · CPC title

• G02F1/167

  by electrophoresis · CPC title

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title