Display apparatus

Patent metadata

Field	Value
Publication number	US-2023090498-A1
Application number	US-202217831418-A
Country	US
Kind code	A1
Filing date	Jun 2, 2022
Priority date	Jul 28, 2021
Publication date	Mar 23, 2023
Grant date	—

Abstract

A display apparatus includes: a display substrate; a plurality of display elements provided on the display substrate and which emit light; an encapsulation substrate provided on the display elements to face the display substrate; a refractive layer provided on a lower surface of the encapsulation substrate, the refractive layer including a first insulating layer having a first refractive index and a second insulating layer having a second refractive index greater than the first refractive index; and a light blocking layer provided on a lower surface of the refractive layer. The first insulating layer and the light blocking layer are arranged to correspond to non-emission areas between the display elements. The second insulating layer is arranged to correspond to emission areas of the display elements. A width of an upper surface of the second insulating layer is less than a width of a lower surface of the second insulating layer.

First claim

What is claimed is:

1 . A display apparatus comprising:
a display substrate; a plurality of display elements provided on the display substrate and configured to emit light; an encapsulation substrate provided on the plurality of display elements to face the display 6 substrate; a refractive layer provided on a lower surface of the encapsulation substrate, the refractive layer comprising a first insulating layer having a first refractive index and a second insulating layer having a second refractive index greater than the first refractive index; and a light blocking layer provided on a lower surface of the refractive layer, wherein the first insulating layer and the light blocking layer are arranged to correspond to non-emission areas between the plurality of display elements, and the second insulating layer is arranged to correspond to emission areas of the plurality of display elements, and a width of an upper surface of the second insulating layer is less than a width of a lower surface of the second insulating layer.

2 . The display apparatus of claim 1 , wherein an angle at which a side surface of the second insulating layer is inclined with respect to a lower surface of the encapsulation substrate is about 50° to about 60°.

3 . The display apparatus of claim 1 , wherein the first refractive index is about 1.45 to about 1.55, and the second refractive index is about 1.55 to about 1.7.

4 . The display apparatus of claim 1 , wherein the second insulating layer comprises a color filter.

5 . The display apparatus of claim 1 , wherein the second insulating layer comprises a reflection control layer configured to selectively absorb a first wavelength band and a second wavelength band of a visible light band.

6 . The display apparatus of claim 5 , wherein the first wavelength band is about 480 nm to about 505 nm, and the second wavelength band is about 585 nm to about 605 nm.

7 . The display apparatus of claim 1 , wherein the light blocking layer comprises an opening corresponding to the emission area, and
the opening of the light blocking layer is greater than the width of the upper surface of the second insulating layer.

8 . The display apparatus of claim 1 , wherein a thickness of the light blocking layer is less than a thickness of the first insulating layer.

9 . The display apparatus of claim 1 , further comprising an upper light blocking layer provided between the encapsulation substrate and the first insulating layer.

10 . The display apparatus of claim 9 , wherein the upper light blocking layer 2 comprises a first opening corresponding to the emission area, the light blocking layer comprises a 3 second opening corresponding to the emission area, and a width of the first opening is greater than 4 a width of the second opening.

11 . A display apparatus comprising:
a display substrate; a first display element, a second display element, and a third display element, which are on the display substrate and are configured to emit different pieces of light from each other; an encapsulation substrate provided on the first display element, the second display element, and the third display element to face the display substrate; a light blocking layer provided below the encapsulation substrate, the light blocking layer comprising openings corresponding to emission areas of the first display element, the second display element, and the third display element; and a refractive layer provided between the encapsulation substrate and the light blocking layer, the refractive layer comprising a first insulating layer having a first refractive index and a second insulating layer having a second refractive index greater than the first refractive index, wherein the second insulating layer is arranged to correspond to the emission areas of the first display element, the second display element, and the third display element, and a width of an upper surface of the second insulating layer is less than a width of a lower surface of the second insulating layer.

12 . The display apparatus of claim 11 , wherein an angle at which a side surface of the second insulating layer is inclined with respect to a lower surface of the encapsulation substrate is about 50° to about 60°.

13 . The display apparatus of claim 11 , wherein the first refractive index is about 1.45 to about 1.55, and the second refractive index is about 1.55 to about 1.7.

14 . The display apparatus of claim 11 , wherein the second insulating layer comprises a first color filter, a second color filter, and a third color filter configured to emit different colors from each other, and the first color filter, the second color filter, and the third color filter are arranged to correspond to the first display element, the second display element, and the third display element, respectively.

15 . The display apparatus of claim 11 , wherein the second insulating layer comprises a reflection control layer configured to selectively absorb a first wavelength band and a second wavelength band of a visible light band.

16 . The display apparatus of claim 15 , wherein the first wavelength band is about 480 nm to about 505 nm, and the second wavelength band is about 585 nm to about 605 nm.

17 . The display apparatus of claim 15 , wherein the second insulating layer is provided equally on the first display element, the second display element, and the third display element.

18 . The display apparatus of claim 15 , wherein the second insulating layer extends between the first, second, and third display elements and the light blocking layer.

19 . The display apparatus of claim 11 , wherein an opening of the light blocking layer is greater than the width of the upper surface of the second insulating layer.

20 . The display apparatus of claim 11 , further comprising an upper light blocking layer between the encapsulation substrate and the first insulating layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Woongsik
• Hong Jongbeom
• Kim Jeongwon
• Byun Jinsu

Classifications

• H10K59/8792

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

• H10K59/873

  Encapsulations · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K59/879 Primary

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

• H10K50/125

  specially adapted for multicolour light emission, e.g. for emitting white light · CPC title