Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11061268-B2
Application number	US-201715825005-A
Country	US
Kind code	B2
Filing date	Nov 28, 2017
Priority date	Jul 21, 2017
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

A display device and a method of manufacturing a display device, the display device having a plurality of pixels defined therein and including: a first substrate; a partition wall disposed on the first substrate to define openings corresponding to the plurality of pixels; and color conversion patterns disposed in the openings. The partition wall includes a light-transmitting structure having a groove and a first partition wall portion disposed in the groove and having a higher optical density than the light-transmitting structure.

First claim

What is claimed is:

1. A display device including a plurality of pixels defined therein, the display device comprising:
a first substrate;
a partition wall disposed on the first substrate to define openings corresponding to the plurality of pixels;
color conversion patterns disposed in the openings;
a wavelength band filter disposed between the color conversion patterns and the first substrate; and
a light-shielding member disposed between the first substrate and the partition wall,
wherein:
the partition wall comprises a light-transmitting structure comprising a groove and a first partition wall portion disposed in the groove and having a higher optical density than the light-transmitting structure;
a portion of the wavelength band filter is disposed between the light-transmitting structure and the first substrate;
the portion of the wavelength band filter overlaps a portion of the light-transmitting structure;
no portion of the wavelength band filter overlaps the first partition wall portion; and
the first partition wall portion is in contact with the light-transmitting structure and the light-shielding member.

2. The display device of claim 1 , wherein the first partition wall portion extends in a first direction and a second direction intersecting the first direction, and defines the openings corresponding to the plurality of pixels.

3. The display device of claim 2 , wherein a minimum spacing distance, in the first direction, between adjacent portions of the partition wall is greater than a maximum width, in the first direction, of the groove.

4. The display device of claim 1 , wherein:
the partition wall comprises a plurality of first portions extending in a first direction and a plurality of second portions extending in a second direction intersecting the first direction;
the openings are defined by the first portions and the second portions; and
the color conversion patterns comprise a quantum dot material or a fluorescent material.

5. The display device of claim 1 ,
wherein
a maximum width of the partition wall is less than a maximum width of the light-shielding member.

6. The display device of claim 1 , further comprising a light-shielding member disposed between the first substrate and the partition wall,
wherein the first partition wall portion comprises substantially a same material as the light-shielding member.

7. The display device of claim 1 , wherein:
the light-transmitting structure has a light transmittance of about 90% or higher; and
the first partition wall portion has an optical density of about 2.0/2 μm or higher.

8. The display device of claim 1 , wherein:
the first partition wall portion has a height equal to or greater than about 7.0 μm; and
the first partition wall portion has a width equal to or greater than about 1.0 μm.

9. A display device including a plurality of pixels defined therein, the display device comprising:
a first substrate;
a partition wall disposed on the first substrate to define openings corresponding to the plurality of pixels;
color conversion patterns disposed in the openings;
a wavelength band filter disposed between the color conversion patterns and the first substrate,
wherein:
the partition wall comprises a light-transmitting structure comprising a groove and a first partition wall portion disposed in the groove and having a higher optical density than the light-transmitting structure;
a portion of the wavelength band filter is disposed between the light-transmitting structure and the first substrate;
the portion of the wavelength band filter overlaps a portion of the light-transmitting structure;
no portion of the wavelength band filter overlaps the first partition wall portion; and
the partition wall further comprises second partition wall portions disposed between the light-transmitting structure and the color conversion patterns and having a higher optical density than the light-transmitting structure.

10. The display device of claim 9 , wherein:
the second partition wall portions are in contact with the color conversion patterns; and
a slope of sides of the second partition wall portions in contact with the color conversion patterns is different from a slope of sides of the second partition wall portions in contact with the light-transmitting structure.

11. A display device including a plurality of pixels defined therein, the display device comprising:
a first substrate;
a partition wall disposed on the first substrate to define openings corresponding to the plurality of pixels; and
color conversion patterns disposed in the openings,
wherein:
the partition wall comprises a light-transmitting structure comprising a groove and a first partition wall portion disposed in the groove and having a higher optical density than the light-transmitting structure;
the plurality of pixels comprise a first pixel displaying a first color and a second pixel displaying a second color having a shorter peak wavelength than the first color;
the display device further comprises: a first wavelength band filter disposed between the color conversion patterns and the first substrate and disposed in the first pixel; a liquid crystal layer disposed on the color conversion patterns; a second wavelength band filter disposed between the color conversion patterns and the liquid crystal layer; a polarizing layer disposed between the second wavelength conversion filter and the liquid crystal layer; a second substrate disposed on the liquid crystal layer; and a light source unit disposed on the second substrate and providing light of the second color;
the color conversion pattern comprises a first color conversion pattern disposed in the first pixel and configured to convert light incident thereupon into light of the first color and emit the converted light;
the first wavelength band filter is configured to transmit therethrough light of a wavelength band including a peak wavelength of the first color and block the transmission of light of a wavelength band including a peak wavelength of the second color;
the second wavelength band filter is configured to transmit therethrough light of a wavelength band including the peak wavelength of the second color and reflect light of a wavelength band including the peak wavelength of the first color; and
the second wavelength band filter is in contact with the first color conversion pattern, the light-transmitting structure, and the first partition wall portion.

12. The display device of claim 11 , wherein:
the plurality of pixels further comprise a third pixel displaying a third color, which has a longer peak wavelength than the second color and has a different peak wavelength from the first color;
the display device further comprises a light-transmitting pattern disposed in the second pixel;
the color conversion patterns further comprise a second color conversion pattern disposed in the third pixel;
the second color conversion pattern is configured to convert light incident thereupon into light of the third color and emit the converted light;
a third partition wall portion is disposed between the first and second color conversion patterns; and
the third partition wall portion is also disposed between the first color conversion pattern and the light-transmitting pattern.

13. The display device of claim 11 , wherein:
the plurality of pixels further comprise a fourth pixel configured to display the first color;
the color conversion patterns further comprise a third color conversion pattern disposed in the fourth pixel;
the third color conversion pattern is configured to convert light incident thereupon into light o

Assignees

• Samsung Display Co Ltd

Inventors

• Park sang ji
• Kim Kang Uk
• Yun Hae Ju
• Cho Don Chan
• Cho Young Je

Classifications

• G02F2202/04

  dye · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02B26/007

  the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title