Wavelength conversion member, method of manufacturing the same, and backlight assembly including the same

Patent metadata

Field	Value
Publication number	US-9568664-B2
Application number	US-201414315038-A
Country	US
Kind code	B2
Filing date	Jun 25, 2014
Priority date	Feb 5, 2014
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A wavelength conversion member is disclosed. In one aspect, the wavelength conversion member includes a first substrate, a second substrate formed over the first substrate, and a wavelength conversion layer interposed between the first and second substrates. A sealant is interposed between the first and second substrates and surrounds the wavelength conversion layer.

First claim

What is claimed is:

1. A wavelength conversion member for a display device, comprising:
a first substrate;
a second substrate formed over the first substrate;
a wavelength conversion layer interposed between the first and second substrates; and
a sealant interposed between the first and second substrates and surrounding the wavelength conversion layer,
wherein the wavelength conversion layer directly contacts the first substrate or the second substrate, and
wherein the wavelength conversion layer comprises a plurality of quantum dots and an inert gas filling a space between the quantum dots and dispersed in the wavelength conversion layer.

2. The wavelength conversion member of claim 1 , wherein the wavelength conversion layer has a thickness of about 10 μm to about 20 μm.

3. The wavelength conversion member of claim 1 , wherein the sealant comprises a mixture of fine particles and a second resin.

4. The wavelength conversion member of claim 3 , wherein the fine particles are formed of the same material as at least one of the first and second substrates.

5. The wavelength conversion member of claim 1 , further comprising a light blocking layer formed along edges of at least one of the first and second substrates.

6. The wavelength conversion member of claim 1 , further comprising a reflection preventing layer or a light transmission adjusting layer formed on at least one of the first substrate and the second substrate.

7. The wavelength conversion member of claim 1 , wherein each of the first and second substrates has a substantially C-shape.

8. A display device, comprising:
a display panel; and
a backlight assembly including i) a light source configured to emit light and ii) a wavelength converter located adjacent to the light source and configured to convert the wavelength of at least a portion the light emitted from the light source to another wavelength,
wherein the wavelength converter comprises:
a first substrate located adjacent to the light source;
a second substrate formed over the first substrate;
a wavelength conversion layer interposed between the first and second substrates; and
a sealant interposed between the first and second substrates and surrounding the wavelength conversion layer,
wherein the wavelength conversion layer directly contacts the first substrate or the second substrate, and wherein the wavelength conversion layer comprises a plurality of quantum dots and an inert gas filling a space between the quantum dots and dispersed in the wavelength conversion layer.

9. The display device of claim 8 , further comprising a light guide plate (LGP) located adjacent to the wavelength converter, wherein the wavelength converter is fixed to the LGP via an adhesive or a fixing device.

10. The display device of claim 8 , wherein the light source is configured to emit blue light and wherein the wavelength converter is configured to convert the blue light into white light.

11. The display device of claim 3 , wherein the fine particles are formed of a different material than the second resin.

Assignees

• Samsung Display Co Ltd

Inventors

• Cho Joo Woan
• Yang Byung Choon

Classifications

• G02B6/0023 Primary

  provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source · CPC title

• G02B6/0065 Primary

  Manufacturing aspects; Material aspects · CPC title

• G02F1/3556

  Semiconductor materials, e.g. quantum wells · CPC title

• G02B6/0025

  Diffusing sheet or layer; Prismatic sheet or layer · CPC title

• G02B6/0095

  Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like · CPC title