Light field display apparatus

Patent metadata

Field	Value
Publication number	US-10542250-B2
Application number	US-201715688301-A
Country	US
Kind code	B2
Filing date	Aug 28, 2017
Priority date	Oct 28, 2016
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

A light field display apparatus includes a display panel and a micro lens array. The display panel includes a plurality of sub-pixels arranged in a matrix. The micro lens array is disposed on the display panel. The micro lens array includes a plurality of micro lenses. Each of the plurality of sub pixels emits light of a single color, of a set of primary colors. The arrangement of the micro lens array, relative to the display panel, causes the light of certain sub pixels, of the plurality of sub pixels to be emphasized. The micro lens array is arranged, relative to the display panel, so that sub pixels of each primary color are emphasized to a same extent.

First claim

What is claimed is:

1. A light field display apparatus comprising:
a display panel comprising a plurality of sub-pixels arranged in a matrix; and
a micro lens array disposed on the display panel, the micro lens array comprising a plurality of micro lenses, each of which having six corners,
wherein each of the plurality of sub pixels emits light of a single color, of a set of three primary colors including a first primary color, a second primary color, and a third primary color,
wherein mixed color light of the sub-pixels corresponding to same positions of each of the adjacent micro lenses is white, and
wherein for each micro lens of the plurality of micro lenses, at least a first corner of the six corners overlaps a sub-pixel of the first primary color, at least a second corner of the six corners overlaps a sub-pixel of the second primary color, and at least a third corner of the six corners overlaps a sub-pixel of the third primary color.

2. The light field display apparatus of claim 1 , wherein the micro lens has a hexagonal shape, and adjacent sides of two micro lenses make contact with each other to form a honeycomb structure.

3. The light field display apparatus of claim 2 , wherein the sub-pixels comprises a plurality of red sub pixels, a plurality of green sub-pixels and a plurality of blue sub pixels which are alternately arranged in the first direction, and same color of sub-pixels are continuously arranged in the second direction to form a stripe pattern.

4. The light field display apparatus of claim 3 , wherein the micro lenses are arranged at a tilt angle with respect to the first direction and the second direction, respectively.

5. The light field display apparatus of claim 4 , wherein the tilt angle is determined by the following equation 1:
tilt angle =tan−1[(sub-pixel vertical pitch)/((number of horizontal viewpoints)*(sub-pixel horizontal pitch))],  [equation 1]

where, the sub-pixel vertical pitch is a distance in the second direction between centers of the two adjacent sub-pixels, the sub-pixel horizontal pitch is a distance in the first direction between centers of the two adjacent sub-pixels, the number of horizontal viewpoints is the number of sub-pixels in a horizontal pitch, and the horizontal pitch a distance in the first direction between centers of the two adjacent micro lenses.

6. The light field display apparatus of claim 5 , wherein the number of horizontal viewpoints is 2n+2, where n is a positive integer, a number of vertical viewpoints is the number of sub-pixels in a vertical pitch, the vertical pitch is a distance in the second direction between centers of the two adjacent micro lenses, and the number of vertical viewpoints is a natural number close to the value of horizontal viewpoints/3.

7. The light field display apparatus of claim 2 , wherein two sides of the hexagonal shape facing each other have a same length, and the hexagonal shape is an asymmetric hexagonal shape.

8. The light field display apparatus of claim 7 , wherein a distance between upper vertex and lower vertex of the hexagonal shape in the first direction is less than a horizontal pitch of one sub-pixel.

9. The light field display apparatus of claim 1 , wherein the micro lens has a circular or elliptical shape.

10. The light field display apparatus of claim 1 , wherein the micro lens has a quadrangle shape.

11. The light field display apparatus of claim 1 , wherein the sub-pixels comprises a plurality of red sub pixels, a plurality of green sub-pixels and a plurality of blue sub pixels, and one red sub-pixel and one blue sub-pixel are corresponding to two green sub-pixels.

12. The light field display apparatus of claim 11 , wherein two sides of the hexagonal shape facing each other have same length, the hexagonal shape is an asymmetric hexagonal shape, and one side of the hexagonal shape is in parallel with the second direction.

13. The light field display apparatus of claim 1 , wherein in three micro lenses each of which is in contact with each other, red sub-pixel, green sub-pixel and blue sub-pixel are corresponding to same positions of each of the three micro lenses, respectively.

14. The light field display apparatus of claim 13 , wherein the red sub-pixel, the green sub-pixel and the blue sub-pixel corresponding to the same positions form vertexes of an equilateral triangle.

15. The light field display apparatus of claim 1 , wherein in four micro lenses each of which is in contact with each other, red sub -pixel, green sub-pixel, blue sub pixel and white sub-pixel are corresponding to same positions of each of the four micro lenses, respectively.

16. The light field display apparatus of claim 15 , wherein the red sub-pixel, the green sub-pixel, the blue sub-pixel and the white sub-pixel corresponding to the same positions form vertexes of a parallelogram.

17. The light field display apparatus of claim 1 , wherein in three micro lenses, comprising two micro lenses contacting each other and one micro lenses spaced apart from the two micro lenses by one micro lens, a red sub-pixel, a green sub-pixel and a blue sub-pixel correspond to same positions of each of the three micro lenses, respectively.

18. The light field display apparatus of claim 1 , wherein the sub-pixels comprises a plurality of red sub pixels, a plurality of green sub-pixels and a plurality of blue sub pixels,
wherein two sub-pixels adjacent to each other in the second direction are disposed at a first angle which is an acute angle with respect to the first direction,
wherein same color of sub-pixels are continuously arranged in the diagonal direction which makes a second angle which is an acute angle with respect to the second direction,
wherein the micro lens has a hexagonal shape, and one side of the hexagonal shape is in parallel with the first direction, and
wherein in three micro lenses each of which is in contact with each other, the red sub-pixel, the green sub-pixel and the blue sub-pixel correspond to same positions of each of the three micro lenses, respectively.

19. The light field display apparatus of claim 18 , wherein the hexagonal shape is a regular hexagonal shape, wherein the first angle is 60 degree, and wherein the second angle is 30 degree.

20. The light field display apparatus of claim 1 , wherein the sub-pixels comprises a plurality of red sub pixels, a plurality of green sub-pixels and a plurality of blue sub pixels,
wherein three sub-pixels which are adjacent to each other in the first direction are disposed to form an obtuse first angle,
wherein two sub pixels adjacent to each other in the second direction and one sub-pixel adjacent to the two sub-pixels in the first direction are disposed to form an obtuse second angle,
wherein same color of sub-pixels are continuously arranged in the second direction,
wherein the micro lens has a hexagonal shape, one side of the hexagonal shape is in parallel with the second direction, and
wherein in three micro lenses, each of which is in contact with each other, the red sub-pixel, the green sub-pixel and the blue sub-pixel correspond to same positions of each of the three micro lenses, respectively.

21. The light field display apparatus of claim 20 , wherein the hexagonal shape is a regular hexagonal shape, wherein the first angle is 60 degree, and wherein the second angle is 120 degree.

22. A light field display apparatus comprising:
a display panel comprising a plurality of sub-pixels arranged in a matrix; and
a micro lens arra

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Beomshik
• Kwon Jaejoong
• Cho Joo Woan
• Huh Sujung

Classifications

• H04N13/305 Primary

  using lenticular lenses, e.g. arrangements of cylindrical lenses · CPC title

• H04N13/327

  Calibration thereof · CPC title

• G02F1/29 Primary

  for the control of the position or the direction of light beams, i.e. deflection · CPC title

• H04N13/286

  having separate monoscopic and stereoscopic modes · CPC title

• H04N13/324

  Colour aspects · CPC title