Display device

Patent metadata

Field	Value
Publication number	US-10371983-B2
Application number	US-201715659287-A
Country	US
Kind code	B2
Filing date	Jul 25, 2017
Priority date	Jul 26, 2016
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

A display device includes a display panel including a plurality of pixels each having a plurality of sub-pixels; and a light path adjustment film on the display panel, wherein the light path adjustment film includes a first base film, and a pattern layer on a surface of the first base film, wherein the pattern layer includes a plurality of first patterns having a first refractive index, and a plurality of second patterns between the first patterns and having a second refractive index less than the first refractive index, and wherein the first pattern includes a top surface spaced apart from the display panel and parallel with the display panel, a bottom surface between the top surface and the display panel, and a slanted surface connecting the top surface and the bottom surface.

First claim

What is claimed is:

1. A display device comprising:
a display panel including a plurality of pixels each having a plurality of sub-pixels; and a
light path adjustment film on the display panel,
wherein the light path adjustment film includes a first base film, and a pattern layer on a surface of the first base film,
wherein the pattern layer includes a plurality of first patterns having a first refractive index, and a plurality of second patterns between the plurality of first patterns and having a second refractive index less than the first refractive index,
wherein each of the plurality of first patterns includes a top surface spaced apart from the display panel and parallel with the display panel, a bottom surface between the top surface and the display panel and overlapping the top surface, and a slanted surface connecting the top surface and the bottom surface,
wherein the bottom surface of each of the plurality of first patterns is wider than the top surface of the first pattern that overlaps the bottom surface,
wherein each of the plurality of first patterns overlaps a corresponding one sub-pixel from the plurality of sub-pixels,
wherein a width of a bottom surface of a first pattern from the plurality of first patterns is wider than a width of an opening region of the sub-pixel that corresponds to the first pattern, and
wherein a width of a top surface of the first pattern is wider than a width of the opening region of the subpixel.

2. The device of claim 1 , wherein the light path adjustment film further includes a second base film, and the pattern layer is between the first and second base films.

3. The device of claim 1 , wherein the plurality of first patterns are spaced apart from each other.

4. The device of claim 3 , wherein the bottom surface of each of the plurality first patterns is spaced apart from a bottom surface of an adjacent first pattern such that a gap is formed between the bottom surface of the first pattern and the bottom surface of the adjacent first pattern.

5. The device of claim 1 , wherein the first pattern has a truncated polypyramid shape or truncated cone shape.

6. The device of claim 1 , wherein the plurality of second patterns comprise air gaps in the pattern layer.

7. The device of claim 1 , wherein the bottom surface of each of the plurality of first patterns is in contact with a bottom surface of an adjacent first pattern.

8. A display device comprising:
a display panel including a plurality of pixels each having a plurality of sub-pixels; and a
light path adjustment film on the display panel,
wherein the light path adjustment film includes a first base film, and a pattern layer on a surface of the first base film,
wherein the pattern layer includes a plurality of first patterns having a first refractive index, and a plurality of second patterns between the plurality of first patterns and having a second refractive index less than the first refractive index,
wherein each of the plurality of first patterns includes a top surface spaced apart from the display panel and parallel with the display panel, a bottom surface between the top surface and the display panel and overlapping the top surface, and a slanted surface connecting the top surface and the bottom surface,
wherein the bottom surface of each of the plurality of first patterns is wider than the top surface of the first pattern that overlaps the bottom surface,
wherein each of the plurality of first patterns overlaps a corresponding one sub-pixel from the plurality of pixels,
wherein a width of a bottom surface of a first pattern from the plurality of first patterns is wider than a width of an opening region and non-opening regions of a sub-pixel of a given pixel that corresponds to the first pattern,
wherein the opening region is between the non-opening regions of the sub-pixel of the given pixel, and
wherein a width of a top surface of the first pattern is wider than the width of the opening region of the sub-pixel of the given pixel, and is equal to or less than the non-opening regions of the sub-pixel of the given pixel.

9. The device of claim 8 , wherein the plurality of second patterns comprise air gaps in the pattern layer.

10. The device of claim 8 , wherein the bottom surface of each of the plurality of first patterns is in contact with a bottom surface of an adjacent first pattern.

11. The device of claim 8 , wherein the bottom surface of each of the plurality first patterns is spaced apart from a bottom surface of an adjacent first pattern such that a gap is formed between the bottom surface of the first pattern and the bottom surface of the adjacent first pattern.

12. The device of claim 8 , wherein the first pattern has a truncated polypyramid shape or truncated cone shape.

13. A display device comprising:
a display panel including a plurality of pixels each having a plurality of sub-pixels; and a
light path adjustment film on the display panel,
wherein the light path adjustment film includes a first base film, and a pattern layer on a surface of the first base film,
wherein the pattern layer includes a plurality of first patterns having a first refractive index, and a plurality of second patterns between the plurality of first patterns and having a second refractive index less than the first refractive index,
wherein each of the plurality of first patterns includes a top surface spaced apart from the display panel and parallel with the display panel, a bottom surface between the top surface and the display panel and overlapping the top surface, and a slanted surface connecting the top surface and the bottom surface,
wherein the top surface of each of the plurality of first patterns is wider than the bottom surface of the first pattern that overlaps the bottom surface,
wherein a width of a top surface of a first pattern from the plurality of first patterns is wider than a width of an opening region of the sub-pixel that corresponds to the first pattern, and
wherein a width of the bottom surface of the first pattern is wider than a width of the opening region of the sub-pixel.

14. The device of claim 13 , wherein the light path adjustment film further includes a second base film, and the pattern layer is between the first and second base films.

15. The device of claim 13 , wherein the plurality of second patterns comprise air gaps in the pattern layer.

16. The device of claim 1 , wherein the bottom surface of each of the plurality of first patterns is in contact with a bottom surface of an adjacent first pattern.

17. The device of claim 13 , wherein the bottom surface of each of the plurality first patterns is spaced apart from a bottom surface of an adjacent first pattern such that a gap is formed between the bottom surface of the first pattern and the bottom surface of the adjacent first pattern.

18. A display device comprising:
a display panel including a plurality of pixels each having a plurality of sub-pixels; and a
light path adjustment film on the display panel,
wherein the light path adjustment film includes a first base film, and a pattern layer on a surface of the first base film,
wherein the pattern layer includes a plurality of first patterns having a first refractive index, and a plurality of second patterns between the plurality of first patterns and having a second refractive index less than the first refractive index,
wherein each of the plurality of first patterns includes a top surface spaced apart from the display panel and parallel with the display panel, a bottom surface between the top surfa

Assignees

• Lg Display Co Ltd

Inventors

• Lee Se-Min
• Yoon Hyeok-Joon
• Rhim Ju-Sang
• Kim Dae-Yong
• Choi Eun-Hee
• Lee Se-Jin

Classifications

• G02F2001/1635

  the pixel comprises active switching elements, e.g. TFT · CPC title

• G02F1/1335 Primary

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• G02F1/133502

  Antiglare, refractive index matching layers · CPC title

• G02F1/195

  by using frustrated reflection (digital reflection using controlled total internal reflection G02F1/315) · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title