Display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10429010-B2
Application number	US-201715447842-A
Country	US
Kind code	B2
Filing date	Mar 2, 2017
Priority date	Jul 21, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A display device includes an organic fluorescent body unit and a display panel provided on the organic fluorescent body unit. The organic fluorescent body unit may include a light source unit including a light source substrate and a plurality of light sources on the light source substrate, a red organic fluorescent body layer covering the light sources and including a red organic fluorescent body, and a green organic fluorescent body layer provided on the red organic fluorescent body layer and including a green organic fluorescent body. The red organic fluorescent body layer may include a plurality of red organic fluorescent body patterns, each of which respectively covers one of the light sources.

First claim

What is claimed is:

1. A display device, comprising:
an organic fluorescent body unit; and
a display panel on the organic fluorescent body unit, wherein the organic fluorescent body unit includes:
a light source unit including a light source substrate and a plurality of light sources on the light source substrate,
fluorescent body patterns, each of the red organic fluorescent body patterns including a red organic fluorescent body,
a green organic fluorescent body layer provided on the red organic fluorescent body layer and including a green organic fluorescent body, and
a base member interposed between the green organic fluorescent body layer and the red organic fluorescent body patterns, the base member including:
a top surface contacting the green organic fluorescent body layer, the top surface being flat and continuous over an entirety of the light source substrate, and
a bottom surface opposite the top surface and contacting the light source substrate, the bottom surface including fluorescent body grooves extending from the bottom surface only partially toward the top surface, and each of the red organic fluorescent body patterns being respectively accommodated in one of the fluorescent body grooves,

wherein:
the red organic fluorescent body patterns respectively contact top and side surfaces of each of the light sources, and
the base member is in contact with each of the red organic fluorescent body patterns and separated from each of the light sources by the red organic fluorescent body patterns.

2. The display device as claimed in claim 1 , wherein, on a plane, the red organic fluorescent body patterns overlap a portion of the light source substrate.

3. The display device as claimed in claim 1 , wherein, on a plane, the red organic fluorescent body patterns are spaced apart from each other.

4. The display device as claimed in claim 1 , wherein the fluorescent body grooves are conformal around respective outer surfaces of the red organic fluorescent body patterns.

5. The display device as claimed in claim 4 , wherein each of the red organic fluorescent body patterns is enclosed between the light source substrate and a respective fluorescent body groove of the fluorescent body grooves.

6. The display device as claimed in claim 1 , wherein the green organic fluorescent body layer is spaced apart from the light source substrate and provided over the entirety of the light source substrate.

7. The display device as claimed in claim 1 , wherein the top surface of the base member completely covers all the red organic fluorescent body patterns of the red organic fluorescent body layer.

8. The display device as claimed in claim 1 , further comprising a diffusion plate between the green organic fluorescent body layer of the organic fluorescent body unit and the display panel.

9. The display device as claimed in claim 8 , further comprising an optical sheet between the diffusion plate and the display panel, the diffusion plate being between the optical sheet and the green organic fluorescent body layer.

10. The display device as claimed in claim 1 , wherein the red organic fluorescent body is a perylene-based compound and the green organic fluorescent body is a boron-dipyrromethene-based compound.

11. The display device as claimed in claim 1 , wherein light generated by the green organic fluorescent body has a full width at half maximum that is smaller than the full width at half maximum of light generated by the red organic fluorescent body.

12. The display device as claimed in claim 1 , wherein the glass transition temperature of the green organic fluorescent body is lower than the glass transition temperature of the red organic fluorescent body.

13. The display device as claimed in claim 1 , wherein the light source substrate includes a plurality of sealing parts, each of which is aligned with an edge of a corresponding fluorescent body groove and one of the red fluorescent body patterns.

14. A method for manufacturing a display device, the method comprising:
providing an organic fluorescent body unit; and
providing a display panel on the organic fluorescent body unit, wherein the providing of the organic fluorescent body unit includes:
preparing a base substrate and a plurality of light sources provided on the base substrate;
providing a base member on the base substrate;
providing a red organic fluorescent body layer including a plurality of organic fluorescent body patterns, each of which respectively includes a red organic fluorescent body and contacts top and side surfaces of one of the light sources;
providing a green organic fluorescent body layer on the red organic fluorescent body layer and including a green organic fluorescent body, the base member being interposed between the green organic fluorescent body layer and the red organic fluorescent body patterns,
wherein the base member includes:
a top surface contacting the green organic fluorescent body layer, the top surface being flat and continuous over an entirety of the base substrate, and
a bottom surface opposite the top surface and contacting the base substrate, the bottom surface including fluorescent body grooves extending from the bottom surface only partially toward the top surface, and each of the red organic fluorescent body patterns being respectively accommodated in one of the fluorescent body grooves, and

wherein the base member is in contact with each of the red organic fluorescent body patterns and separated from each of the light sources by the red organic fluorescent body patterns.

15. The method as claimed in claim 14 , further comprising:
forming injection holes in the base substrate; and
providing the light sources on the base substrate.

16. The method as claimed in claim 15 , wherein, in the providing of the light sources, each of the light sources is provided spaced apart on a plane from the injection holes.

17. The method as claimed in claim 15 , wherein the providing of the red organic fluorescent body layer includes injecting the red organic fluorescent body and a first resin into the injection holes to fill the fluorescent body grooves.

18. The method as claimed in claim 17 , further comprising sealing the injection holes after the providing of the red organic fluorescent body layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Jungkyun
• Cha Hanmoe
• Kim Donghoon

Classifications

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F1/133608

  including particular frames or supporting means · CPC title

• G02F1/133611

  including means for improving the brightness uniformity · CPC title

• F21K9/90

  Methods of manufacture · CPC title

• F21V3/02

  characterised by the shape · CPC title