Light field display device having improved viewing angle

Patent metadata

Field	Value
Publication number	US-11693254-B2
Application number	US-202117473121-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Dec 30, 2020
Publication date	Jul 4, 2023
Grant date	Jul 4, 2023

Abstract

A light field display device including: a display panel including a plurality of subpixels each emitting a light field; and a lenticular lens array on the display panel and including a plurality of lenticular lenses, wherein the plurality of lenticular lenses correspond to a plurality of subpixel groups each including the plurality of subpixels, and wherein a width of each of the plurality of subpixel groups is greater than a width of each of the plurality of lenticular lenses.

First claim

What is claimed is:

1. A light field display device, comprising:
a display panel including a plurality of subpixels each configured to emit a light field; and
a lenticular lens array on the display panel, the lenticular lens array including a plurality of lenticular lenses having a first lenticular lens and a second lenticular lens,
wherein the plurality of subpixels are arranged into a plurality of subpixel groups including a first pixel group having first subpixels from the plurality of subpixels, and the plurality of lenticular lenses correspond to the plurality of subpixel groups,
wherein a width of each of the plurality of subpixel groups is greater than a width of each of the plurality of lenticular lenses such that the first pixel group overlaps both the first lenticular lens and the second lenticular lens, and
wherein the light fields emitted from the plurality of subpixels of one of the plurality of subpixel groups pass through one of the plurality of lenticular lenses such that a light field emitted by the first pixel group passes through the first lenticular lens but not the second lenticular lens even though the first pixel group overlaps both the first lenticular lens and the second lenticular lens.

2. The device of claim 1 , wherein the plurality of subpixel groups comprise:
a plurality of first subpixel groups in odd horizontal subpixel lines; and
a plurality of second subpixel groups in even horizontal subpixel lines.

3. The device of claim 2 , wherein the plurality of first subpixel groups comprise:
a first subpixel line in a first odd horizontal subpixel line and including the plurality of subpixels; and
a second subpixel line in a second odd horizontal subpixel line and including the plurality of subpixels.

4. The device of claim 2 , wherein the plurality of second subpixel groups comprise:
a third subpixel line in a first even horizontal subpixel line and including the plurality of subpixels; and
a fourth subpixel line in a second even horizontal subpixel line and including the plurality of subpixels.

5. The device of claim 1 , further comprising a light path controlling part adjusting a path of the light field emitted from the plurality of subpixel groups and transmitting the light field to the plurality of lenticular lenses.

6. The device of claim 5 , wherein the light path controlling part is disposed in the display panel.

7. The device of claim 5 , wherein the light path controlling part is disposed between the display panel and the lenticular lens array.

8. The device of claim 5 , wherein the light path controlling part comprises:
a first barrier selectively blocking or transmitting the light field emitted from the display panel; and
a second barrier selectively blocking or transmitting the light field passing through the first barrier.

9. The device of claim 8 , further comprising:
a first insulating layer between the display panel and the first barrier;
a second insulating layer between the first and second barriers; and
a third insulating layer between the second barrier and the lenticular lens array,
wherein the first, second and third insulating layers have a same refractive index as each other.

10. The device of claim 5 , wherein the light path controlling part comprises:
a lens refracting the light field emitted from the display panel; and
a barrier selectively blocking or transmitting the light field refracted by the lens.

11. The device of claim 1 , wherein the plurality of subpixel groups and the plurality of lenticular lenses cross each other with a slanting angle.

12. The device of claim 11 , wherein the plurality of lenticular lenses are inclined with respect to a vertical direction of the plurality of subpixel groups.

13. The device of claim 11 , wherein the plurality of subpixel groups are inclined with respect to a vertical direction of the plurality of lenticular lenses.

14. The device of claim 1 , further comprising a light emitting diode that has an emission area corresponding to the at least one lens pattern.

15. The device of claim 1 , wherein a black image region displaying a black is disposed at both sides of each of the plurality of subpixel groups.

16. The device of claim 1 , wherein the display panel includes one of a liquid crystal display panel, an organic light emitting diode display panel, a plasma display panel, an electrophoretic display panel, a quantum dot display panel, a mini light emitting diode display panel and a micro light emitting diode display panel.

17. The device of claim 1 , wherein the plurality of lenticular lenses include the first lenticular lens, the second lenticular lens and a third lenticular lens, and the plurality of subpixel groups include the first pixel group, a second pixel group and a third subpixel group corresponding to the first lenticular lens, the second lenticular lens and the third lenticular lens, respectively,
wherein the plurality of subpixels of the first subpixel group include first, second and third subpixels disposed under the first lenticular lens, the second lenticular lens, and the third lenticular lens, respectively, and
wherein the light fields emitted from the first subpixel, the second subpixel, and the third subpixel pass through the first lenticular lens without passing through the second lenticular lens and the third lenticular lens.

Assignees

• Lg Display Co Ltd

Inventors

• Park Ju-Seong
• Park Myung-Soo
• Kim Dong-Yeon
• Kim Young-Min
• Oh Se-Wan

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• G02B30/10 Primary

  using integral imaging methods · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• G02F1/133526

  Lenses, e.g. microlenses or Fresnel lenses · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title