Display device

Patent metadata

Field	Value
Publication number	US-9599856-B2
Application number	US-201514608490-A
Country	US
Kind code	B2
Filing date	Jan 29, 2015
Priority date	Jul 30, 2014
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A display device having a first substrate, a second substrate above and facing the first substrate, a light-amount adjusting layer interposed between the first substrate and the second substrate, a plurality of color conversion layers respectively defining a plurality of pixel regions, a wavelength conversion layer disposed on a bottom surface of the color conversion layers, and a backlight unit disposed under the first substrate. The light-amount adjusting layer comprises liquid crystal molecules.

First claim

What is claimed is:

1. A display device comprising:
a first substrate;
a second substrate above and facing the first substrate;
a light-amount adjusting layer interposed between the first substrate and the second substrate;
a plurality of color conversion layers respectively defining a plurality of pixel regions;
a wavelength conversion layer disposed on a bottom surface of the color conversion layers; and
a backlight unit disposed under the first substrate, the wavelength conversion layer converting a part of visible light emitted from the backlight unit into invisible light.

2. The display device of claim 1 , the color conversion layers and the wavelength conversion layer being disposed on a bottom surface of the second substrate, wherein the light-amount adjusting layer comprises liquid crystal molecules.

3. The display device of claim 1 , the color conversion layers and the wavelength conversion layer being disposed on a top surface of the second substrate, wherein the light-amount adjusting layer comprises liquid crystal molecules.

4. The display device of claim 3 , further comprising a third substrate above and facing the second substrate.

5. The display device of claim 4 , the wavelength conversion layer and the color conversion layers being disposed between the second substrate and the third substrate.

6. The display device of claim 1 , the wavelength conversion layer converting a part of light emitted from the backlight unit into infrared rays.

7. The display device of claim 1 , the wavelength conversion layer having a thickness in a range of 1 μm to 10 μm.

8. The display device of claim 1 , the wavelength conversion layer comprising a phosphor.

9. The display device of claim 8 , the phosphor comprising a quantum dot particle.

10. The display device of claim 1 , the color conversion layers comprising:
a partition wall defining pixel areas; and
color phosphor disposed in the pixel areas defined by the partition wall.

11. The display device of claim 10 , the color phosphor in each pixel area comprising at least one of a red phosphor, a green phosphor, and a blue phosphor.

12. The display device of claim 11 , further comprising a blue transmissive layer under the wavelength conversion layer.

13. The display device of claim 12 , further comprising a blue blocking layer on the red phosphor and the green phosphor.

14. The display device of claim 1 , the color conversion layers comprising:
a color phosphor; and
a transparent layer.

15. A display device comprising:
a first substrate;
a second substrate above and facing the first substrate;
a light-amount adjusting layer interposed between the first substrate and the second substrate;
a backlight unit disposed under the first substrate;
a wavelength conversion layer, the wavelength conversion layer converting a part of light emitted from the backlight unit into infrared rays; and
a plurality of color conversion layers corresponding to a plurality of pixel regions disposed between the wavelength conversion layer and the light-amount adjusting layer.

16. The display device of claim 15 , the color conversion layers being disposed on a bottom surface of the first substrate.

17. The display device of claim 15 , the wavelength conversion layer being disposed on an upper surface of the first substrate.

18. The display device of claim 16 , further comprising a polarizer disposed under the color conversion layers, wherein the light-amount adjusting layer comprises liquid crystal molecules.

19. A display device comprising:
a first substrate;
a second substrate above and facing the first substrate;
a light-amount adjusting layer interposed between the first substrate and the second substrate;
a backlight unit disposed under the first substrate;
a wavelength conversion layer, the wavelength conversion layer converting a part of light emitted from the backlight unit into infrared rays; and
a plurality of color conversion layers corresponding to a plurality of pixel regions disposed on the wavelength conversion layer.

20. The display device of claim 19 , further comprising:
the wavelength conversion layer being disposed on an upper surface of the second substrate; and
a polarizer disposed on the color conversion layers, wherein the light-amount adjusting layer comprises liquid crystal molecules.

21. The display device of claim 1 , wherein the wavelength conversion layer converts more amount of the light into the infrared rays as a lightpath of the light passing through the wavelength conversion layer is increasing.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Kwang Keun
• Kim Young Min
• Nam Min Ki
• Park Hae Il
• Yoon Seon Tae

Classifications

• G02F2001/133521

  Physics · mapped topic

• G02F1/133514

  Colour filters · CPC title

• G02F1/133617 Primary

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• G02F1/133521

  Interference filters · CPC title