Display device

Patent metadata

Field	Value
Publication number	US-10705271-B2
Application number	US-201816017936-A
Country	US
Kind code	B2
Filing date	Jun 25, 2018
Priority date	Dec 7, 2017
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A display device includes: a display panel; and a color conversion panel overlapping the display panel, wherein the color conversion panel includes a red color conversion layer and a green color conversion layer including a semiconductor nanocrystal, and a transmissive layer; a red color filter overlapping the red color conversion layer; a green color filter overlapping the green color conversion layer; and a blue color filter overlapping the transmissive layer and a light blocking member, and the light blocking member includes at least one of a blue dye and a blue pigment.

First claim

What is claimed is:

1. A display device comprising:
a display panel; and
a color conversion panel overlapping the display panel,
wherein the color conversion panel comprises:
a red color conversion layer and a green color conversion layer comprising a semiconductor nanocrystal, and a transmissive layer;
a red color filter overlapping the red color conversion layer;
a green color filter overlapping the green color conversion layer; and
a blue color filter overlapping the transmissive layer and a light blocking member,
the light blocking member comprises at least one of a blue dye and a blue pigment, and
plane areas of the red color conversion layer, the green color conversion layer, and the transmissive layer are different from one another.

2. The display device of claim 1 , wherein:
each plane area of the red color conversion layer and the green color conversion layer is larger than a plane area of the transmissive layer.

3. The display device of claim 1 , wherein:
in the color conversion panel,
a unit comprising the red color filter, the green color filter, the blue color filter, and the light blocking member comprises a plurality of the units repeatedly arranged.

4. The display device of claim 3 , wherein:
as the area occupied with the light blocking member is decreased in one of the plurality of the units relative to another one of the plurality of the units, a content of the blue dye or the blue pigment included in the light blocking member is increased in the one unit relative to the other unit.

5. The display device of claim 3 , wherein:
the light blocking member comprises carbon black, and
a content of the carbon black is increased in one of the plurality of the units relative to another one of the plurality of the units as the area occupied with the light blocking member is increased in the one unit relative to the other unit.

6. The display device of claim 1 , wherein:
the display panel emits blue light.

7. The display device of claim 1 , wherein:
the color conversion panel comprises a substrate,
the red color filter, the green color filter, and the blue color filter are positioned between the substrate and the display panel, and
the red color conversion layer, the green color conversion layer, and the transmissive layer are disposed between the red color filter and the display panel.

8. The display device of claim 7 , wherein:
a planarization layer is positioned between the red color filter and the red color conversion layer, between the green color filter and the green color conversion layer, and between the blue color filter and the transmissive layer.

9. The display device of claim 1 , further comprising:
a metal reflective layer positioned in at least one among between the light blocking member and the red color filter, between the light blocking member and the green color filter, and between the light blocking member and the blue color filter.

10. A display device comprising:
a display panel; and
a color conversion panel overlapping the display panel,
wherein the color conversion panel comprises:
a red color conversion layer and a green color conversion layer comprising a semiconductor nanocrystal, and a transmissive layer;
a red color filter overlapping the red color conversion layer;
a green color filter overlapping the green color conversion layer; and
a blue color filter overlapping the transmissive layer and a light blocking member,
the light blocking member comprises at least one of a blue dye and a blue pigment, and
plane areas of the red color filter, the green color filter, and the blue color filter are different from one another.

11. The display device of claim 10 , wherein:
each plane area of the red color filter and the green color filter is larger than a plane area of the blue color filter.

12. A display device comprising:
a display panel; and
a color conversion panel overlapping the display panel,
wherein the color conversion panel comprises:
a red color conversion layer and a green color conversion layer comprising a semiconductor nanocrystal, and a transmissive layer;
a red color filter overlapping the red color conversion layer;
a green color filter overlapping the green color conversion layer; and
a blue color filter overlapping the transmissive layer and a light blocking member, and
each plane area of the red color conversion layer and the green color conversion layer is larger than the plane area of the transmissive layer.

13. The display device of claim 12 , further comprising:
a reflective blue color filter positioned on the same layer as the blue color filter.

14. The display device of claim 13 , wherein:
the display panel comprises a light emitting diode (LED) coupled to a thin film transistor, and
the light emitting diode (LED) comprises:
a pixel electrode coupled to the thin film transistor,
a common electrode overlapping the pixel electrode, and
an emission layer positioned between the pixel electrode and the common electrode.

15. The display device of claim 14 , wherein:
the red color conversion layer, the green color conversion layer, and the transmissive layer overlap the emission layer.

16. The display device of claim 14 , further comprising:
a planarization layer positioned between the red color conversion layer and the green color conversion layer, and the display panel, and between the transmissive layer and the display panel.

17. The display device of claim 16 , wherein:
the planarization layer overlaps the reflective blue color filter.

18. The display device of claim 14 , wherein:
the common electrode comprises:
a first region overlapping the red color filter, the green color filter, and the blue color filter, and
a second region overlapping the reflective blue color filter, and
a thickness of the common electrode positioned in the first region and the second region is differentiated.

19. The display device of claim 18 , wherein:
the thickness of the common electrode positioned at the first region is smaller than the thickness of the common electrode positioned at the second region.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Soo Dong
• Kim Sung Woon
• Ryu Jang Wi
• Park Kyoung Won

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• G02B5/201 Primary

  in the form of arrays · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title

• H10K59/123

  Connection of the pixel electrodes to the thin film transistors [TFT] · CPC title