Display apparatus and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10707275-B2
Application number	US-201816134014-A
Country	US
Kind code	B2
Filing date	Sep 18, 2018
Priority date	Nov 15, 2017
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A display apparatus includes a light-source substrate portion which generates light; and a color control portion to which the generated light from the light-source substrate portion is incident and at which color of the generated light is adjusted to define a color-converted light having a color different from that of the generated light. The color control portion includes: an exit surface through which the color-converted light exits the color control portion; a substrate including a plurality of concave portions defined therein, each of the concave portions extended along a direction from the light-source substrate portion to the exit surface of the color control portion; and a plurality of color conversion members respectively in the plurality of concave portions, the color conversion members each including a color-converting material which converts the color of the generated light to the color of the color-converted light.

First claim

What is claimed is:

1. A display apparatus comprising:
a light-source substrate portion which generates light; and
a color control portion to which the generated light from the light-source substrate portion is incident and at which color of the generated light is adjusted to define a color-converted light having a color different from that of the generated light,
wherein the color control portion comprises:
an exit surface through which the color-converted light exits the color control portion;
a substrate comprising a plurality of concave portions defined therein, wherein:
each of the concave portions extended along a direction from the light-source substrate portion to the exit surface of the color control portion,
each of the plurality of concave portions comprises a first portion and a second portion sequentially arranged in the direction from the light-source substrate portion to the exit surface of the color control portion, the first portion being closer to the light-source substrate portion than the second portion,
a width of the first portion and the second portion are taken in a direction along the light-source substrate portion, and
as a distance to the light-source substrate portion decreases along the direction from the light-source substrate portion to the exit surface of the color control portion,
the width of the first portion decreases to define a width change rate of the first portion, and
the width change rate of the first portion is greater than a width change rate of the second portion; and

a plurality of color conversion members respectively in the plurality of concave portions, the color conversion members each comprising a color-converting material which converts the color of the generated light to the color of the color-converted light.

2. The display apparatus of claim 1 , wherein along the direction from the light-source substrate portion to the exit surface of the color control portion, the width of the second portion is substantially constant.

3. The display apparatus of claim 1 , wherein in cross-section the first portion has a round shape.

4. The display apparatus of claim 1 , wherein the first portion has a shape of any one of a microlens, a pyramid, a tapered hexagonal column and a cone.

5. The display apparatus of claim 1 , wherein
the light-source substrate portion comprises a plurality of subpixel areas at which the color-converted light is emitted to display an image, and
the plurality of concave portions of the color control portion are disposed in one-to-one correspondence with the plurality of subpixel areas of the light-source substrate portion.

6. The display apparatus of claim 1 , wherein
the light-source substrate portion comprises a plurality of subpixel areas at which the color-converted light is emitted to display an image,
the plurality of concave portions comprise a plurality of first concave portions each corresponding to a same first subpixel area, and
within the same first subpixel area, two adjacent first concave portions contact each other.

7. The display apparatus of claim 6 , wherein
the plurality of concave portions further comprise a plurality of second concave portions each corresponding to a same second subpixel area, the same second subpixel area being sequentially arranged with the first subpixel area within the light-source substrate portion,
the plurality of first concave portions together forms a group thereof within the same first subpixel area and the plurality of second concave portions together forms a group thereof within the same second subpixel area, and
within the substrate of the color control portion, the group of the plurality of first concave portions and the group of the plurality of second concave portions are spaced apart from each other.

8. The display apparatus of claim 1 , wherein
the color control portion further comprises an incident surface through which the generated light is incident to the color control portion,
an upper surface of the substrate includes the exit surface and a lower surface of the substrate includes the incident surface,
upper ends of the plurality of concave portions coincide with the upper surface of the substrate, and
lower ends of the plurality of concave portions which are closest to the light-source substrate portion meet the light-source substrate portion at a zero dimension point or at a two-dimensional area.

9. The display apparatus of claim 1 , wherein
the color control portion further comprises an incident surface through which the generated light is incident to the color control portion,
an upper surface of the substrate includes the exit surface and a lower surface of the substrate includes the incident surface,
upper ends of the plurality of concave portions coincide with the upper surface of the substrate, and
along the direction from the light-source substrate portion to the exit surface of the color control portion, lower ends of the plurality of concave portions which are closest to the light-source substrate portion are spaced apart from the light-source substrate portion.

10. The display apparatus of claim 1 , wherein within the color control portion:
the substrate has a first refractive index, and
the plurality of color conversion members have a second refractive index, the second refractive index being greater than the first refractive index.

11. The display apparatus of claim 1 , wherein the plurality of color conversion members comprise:
a first color-converting material including a first quantum dot which converts the color of the generated light from the light-source substrate portion to red light, and
a second color-converting material a second quantum dot which converts the color of the generated light from the light-source substrate portion to green light.

12. The display apparatus of claim 1 , the color control portion further comprises a light scattering member or a light transmission member in a concave portion different from the plurality of concave portions in which the plurality of color conversion members are disposed,
wherein each of the light scattering member and the light transmission member does not color-convert the generated light from the light-source substrate portion.

13. The display apparatus of claim 1 , wherein
the light-source substrate portion comprises an organic light emitting device substrate which generates the light, and
the organic light emitting device substrate comprises any one of a blue-organic light emitting device substrate which generates blue light, a white-organic light emitting device substrate which generates white light, and a cyan-organic light emitting device substrate which generates cyan light.

14. The display apparatus of claim 1 , wherein the light-source substrate portion comprises an organic light emitting device, an inorganic light-emitting device or a backlight unit which generates the light.

15. The display apparatus of claim 1 , wherein
the generated light from the light-source substrate portion has a center wavelength of about 550 nanometers or less, and
the color-converted light from the plurality of color conversion members has a center wavelength of about 450 nanometers or more and about 1200 nanometers or less.

16. The display apparatus of claim 1 , wherein
the light-source substrate portion comprises a first substrate on which is disposed a light-source device portion with which the light-source substrate portion is driven to generate the light,
the substrate of the color control portion is a second substrate different from the first substrate of

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Jiwhan
• Kwak Seungyeon
• Kim Jongsoo
• Kim Taegon
• Lee Sunghun
• Chung Deukseok

Classifications

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K59/877

  comprising scattering means · CPC title

• H10K59/38 Primary

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

• G02F1/133605 Primary

  including specially adapted reflectors · CPC title

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title