Light blocking member of color conversion substrate and display device including the same

Patent metadata

Field	Value
Publication number	US-12419178-B2
Application number	US-202218083923-A
Country	US
Kind code	B2
Filing date	Dec 19, 2022
Priority date	Apr 26, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A color conversion substrate includes a base substrate including a display area and a non-display area which is adjacent to the display area in a first direction, a color filter layer in the display area, a light blocking member in the non-display area, extending in the first direction and defining a pattern groove of the light blocking member, the pattern groove being in the non-display area, and a refractive layer facing the base substrate with both the color filter layer and the light blocking member therebetween. The refractive layer extends into the pattern groove of the light blocking member and fills the pattern groove.

First claim

What is claimed is:

1. A color conversion substrate comprising:
a base substrate including a display area and a non-display area which is adjacent to the display area in a first direction;
a color filter layer in the display area, on the base substrate;
a light blocking member in the non-display area, on the base substrate, the light blocking member extending in the first direction and defining:
a pattern groove of the light blocking member which is in the non-display area,
a grooved area including the pattern groove;
protruding portions of the light blocking member spaced apart from each other which define the pattern groove therebetween; and
a flat portion which is between the grooved area and the display area, in the first direction; and

a refractive layer facing the base substrate with both the color filter layer and the light blocking member therebetween, the refractive layer extending into the pattern groove of the light blocking member,
wherein
the refractive layer, the flat portion of the light blocking member, and each protruding portion among the protruding portions of the light blocking member, has a lower surface which is furthest from the base substrate, and
a first shortest distance between the lower surface of the each protruding portion of the light blocking member and the lower surface of the refractive layer, is smaller than a second shortest distance between the lower surface of the flat portion of the light blocking member and the lower surface of the refractive layer.

2. The color conversion substrate of claim 1 , wherein the refractive layer which extends into the pattern groove of the light blocking member fills the pattern groove.

3. The color conversion substrate of claim 1 , wherein the first shortest distance is about 0.5 micrometer or less.

4. The color conversion substrate of claim 1 , wherein
the non-display area includes:
a sealing area at which the color conversion substrate is bonded to a display substrate which generates and emits incident light toward the color conversion substrate, and
a peripheral area between the display area and the sealing area, and the pattern groove is in the sealing area.

5. The color conversion substrate of claim 4 , wherein
in the sealing area, the color conversion substrate is bonded to the display substrate by a sealing member, and
the pattern groove of the light blocking layer overlaps the sealing member, in the sealing area.

6. The color conversion substrate of claim 1 , wherein the light blocking member includes in order from the base substrate:
a first light blocking layer;
a second light blocking layer overlapping the first light blocking layer in a second direction along a thickness direction of the color conversion substrate; and
a third light blocking layer overlapping the first light blocking layer and the second light blocking layer, in the second direction.

7. The color conversion substrate of claim 6 , wherein the pattern groove of the light blocking member penetrates the third light blocking layer and exposes the second light blocking layer to outside the light blocking member.

8. The color conversion substrate of claim 6 , wherein the pattern groove of the light blocking member penetrates the second light blocking layer and the third light blocking layer, and exposes the first light blocking layer to outside the light blocking member.

9. The color conversion substrate of claim 6 , wherein the pattern groove of the light blocking member penetrates the first light blocking layer, the second light blocking layer and the third light blocking layer, and exposes the base substrate to outside the light blocking member.

10. The color conversion substrate of claim 6 , wherein the light blocking member further includes:
an organic layer facing the base substrate with the first to third light blocking layers therebetween, the organic layer overlapping the first to third light blocking layers, in the second direction, and
wherein, the pattern groove of the light blocking member penetrates the organic layer, and exposes the third light blocking layer to outside the light blocking member.

11. The color conversion substrate of claim 6 , wherein the first light blocking layer is a blue light blocking layer, the second light blocking layer is a red light blocking layer, and the third light blocking layer is a green light blocking layer.

12. The color conversion substrate of claim 11 , wherein
the color filter layer includes a red color filter of a red color filter layer, a green color filter of a green color filter layer and a blue color filter of a blue color filter layer,
the red color filter and the red light blocking layer are respective portions of the red color filter layer,
the green color filter and the green light blocking layer are respective portions of the green color filter layer, and
the blue color filter and the blue light blocking layer are respective portions of the blue color filter layer.

13. The color conversion substrate of claim 12 , further comprising a color conversion layer including:
a first color conversion pattern corresponding to the red color filter;
a second color conversion pattern corresponding to the green color filter; and
a light transmission pattern corresponding to the blue color filter.

14. The color conversion substrate of claim 13 , wherein
the first color conversion pattern includes first wavelength conversion particles which convert an incident light into a light having a red color,
the second color conversion pattern includes second wavelength conversion particles which convert the incident light into a light having a green color, and
the light transmission pattern includes a light scatterer which scatters the incident light.

15. The color conversion substrate of claim 1 , further comprising a capping layer which faces the base substrate with the refractive layer therebetween.

16. A color conversion substrate comprising:
a base substrate including a display area and a non-display area which is adjacent to the display area in a first direction;
a color filter layer in the display area, on the base substrate;
a light blocking member in the non-display area, on the base substrate, the light blocking member extending in the first direction and defining a pattern groove of the light blocking member, the pattern groove being in the non-display area; and
a refractive layer facing the base substrate with both the color filter layer and the light blocking member therebetween,
wherein
the refractive layer extends into the pattern groove of the light blocking member, and
the non-display area includes:
a sealing area at which the color conversion substrate is bonded to a display substrate which generates and emits incident light toward the color conversion substrate, and
a peripheral area between the display area and the sealing area, and the pattern groove is in the sealing area and in the peripheral area.

17. The color conversion substrate of claim 16 , wherein within the peripheral area,
a closest protruding portion among the protruding portions of the light blocking member is closest to the display area,
the closest protruding portion defines a closest pattern groove which is closest to the display area among the plurality of pattern grooves.

18. A display device comprising:
a display area and a non-display area which is adjacent to the display area in a first direction;
a color conversion substrate facing the display area and the non-display area;
a display substrate which generates light

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Wal Jun
• Park Hyunbae
• Ahn Kiwan
• Jang Yongjae

Classifications

• H10K50/844

  Encapsulations · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K59/8792

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

• H10K59/873

  Encapsulations · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title