Display device

1. A display device comprising, a plurality of pixels, the display device comprising:

a. first substrate including light-emitting elements disposed in the plurality of pixels;

a second substrate facing the first substrate;

a plurality of optical patterns disposed on the second substrate and extending along in a first direction, each of the optical patterns spanning, across at least two of the pixels in the first direction; and

light-blocking patterns disposed on the second substrate, wherein the light-blocking patterns comprise a main light-blocking pattern disposed in spaces between adjacent optical patterns, and a subsidiary light-blocking pattern disposed on the optical patterns and having a thickness smaller than a thickness of the main light-blocking pattern,

wherein the lain light-blocking pattern contacts an entirety of a side surface of the adjacent optical patterns and partially covers a bottom surface of the adjacent optical patterns,

the plurality of pixels are arranged in pixel rows extending in a row direction and pixel columns extending in a column direction crossing the row direction;

the plurality of optical patterns are disposed on the second substrate in the pixel columns and extend along the column direction;

the main light-blocking pattern extends along pixel column boundaries disposed between adjacent pixel columns; and

the subsidiary light-blocking pattern is disposed on the optical patterns at pixel row boundaries disposed between adjacent pixel rows and spans at least from a first main light blocking pattern to an adjacent main light blocking pattern at the pixel row boundaries.

2. The display, device of claim 1 ,

wherein each of the optical patterns has a stripe shape when viewed from a top, and

wherein a surface height of the main light-blocking pattern from surface of the optical patterns is 0.8 to 1.2 times a surface height of the subsidiary light-blocking pattern.

3. The display device of claim 1 , wherein the subsidiary light-blocking pattern is extended along the pixel row boundaries.

4. The display device of claim 2 , wherein lines of the main light-blocking pattern and lines of the subsidiary light-blocking pattern that are adjacent to one another are connected to form a lattice shape when viewed from the top.

5. The display device of claim 1 , wherein the plain light-blocking pattern protrudes from a surface of the optical patterns in a thickness direction.

6. The display device of claim 5 , wherein a protruding thickness of the main light-blocking pattern from the surface of the optical patterns ranges from 1 μm to 5 μn.

7. The display device of claim 1 , further comprising:

an encapsulation layer covering the light-emitting elements; and

a filler disposed between the encapsulation layer and the optical patterns.

8. The display device of claim 7 , wherein the filler is in direct contact with the main light-blocking pattern at the pixel column boundaries.

9. The display device of claim 8 , wherein the filler is in direct contact with the subsidiary light-blocking pattern at the pixel row boundaries.

10. The display device of claim 9 , wherein the filler has a smallest thickness at areas where it overlaps with the light-blocking patterns.

11. The display device of claim 1 , wherein each of the light-emitting elements emits blue light and the adjacent optical patterns are configured to receive the blue light and convert a wavelength of the blue light to emit light having different wavelengths.

12. A display device comprising a plurality of pixels arranged in pixel rows extending in a row direction and pixel columns extending in a column direction crossing the row direction, the display device comprising:

a first substrate including light-emitting elements disposed in the pixels;

a second substrate facing the first substrate;

a plurality of optical patterns disposed on the second substrate in the pixel columns and extending along the column direction, each of the optical patterns spanning across at least two of the pixels in the column direction; and

light-blocking patterns including a main light-blocking pattern disposed on the second substrate and extending along pixel column boundaries disposed between adjacent pixel columns, and a subsidiary light-blocking pattern disposed on the optical patterns, extending in a direction crossing an extending direction of the main light-blocking pattern and having a thickness smaller than a thickness of the main light-blocking pattern,

wherein the light-blocking patterns are disposed between adjacent optical patterns and are configured to fill spaces therebetween,

wherein the light-blocking patterns contact an entirety of a side surface of the adjacent optical patterns and partially cover a bottom surface of the adjacent optical patterns, and

wherein the subsidiary light-blocking pattern spans at least from a first main light blocking pattern to an adjacent main light blocking pattern.

13. The display device of claim 12 , further comprising:

ran encapsulation layer covering the light-emitting elements; and

a filler disposed between the encapsulation layer and the optical patterns,

wherein the filler is in direct contact with the light-blocking patterns at the pixel column boundaries.

14. The display, device of claim 12 , wherein the main light-blocking pattern has a stripe shape integrally extended along the pixel column boundaries.

15. The display device of claim 12 , wherein the main light-blocking pattern protrudes from a surface of the optical patterns in a thickness direction, and wherein protruding thickness of the main light-blocking pattern ranges from 1 μm to 5 μm.