Autostereoscopic display device
View Patent ↗The invention provides a lenticular autostereoscopic display device with a particular design of lenticular array (slant angle and pitch angle) to optimise the quality of the views provided to the user. In particular, the invention enables pitch and slant angles to be optimised to achieve square or near square 3D pixels.
1. A method of determining the slant angle for an elongate lens array of an autostereoscopic display device,
wherein the device comprises a display panel, the display panel comprising an array of display pixels arranged to produce a display, the display pixels comprising 5 different color sub-pixels,
wherein the display pixels are arranged in rows and columns, and a lens array arranged in registration with the display panel, the lens array comprising elongate lenses,
wherein the lens array is arranged to project a plurality of views towards a user in different directions,
wherein the elongate lenses are arranged to focus outputs of groups of the display pixels into the plurality of views projected towards a user in different directions, thereby enabling autostereoscopic imaging,
wherein the elongate lenses have a long axis which is slanted at an angle θ to the general column pixel direction,
the method comprising setting:
s
=
±
(
α
p
2
c
-
(
α
p
2
c
)
2
-
1
)
wherein s=tan(θ),
wherein α is the aspect ratio of the pixels forming each of the plurality of views,
wherein p is the pitch of the lenses across the pixel row direction,
wherein the pitch expressed as a number of sub-pixel widths,
wherein c is the number of sub-pixels forming each pixel of the display panel,
wherein
0.8
≤
α
≤
1
0.8
,
wherein
p
=
cA
α
A
-
1
wherein A the reduction factor in resolution of the 3D view with respect to the resolution of the underlying panel.
2. The method as claimed in claim 1 ,
wherein each pixel of the display panel comprises an RGB pixel with red green and blue subpixels,
wherein the red green and blue sub-pixels extend in the column direction,
wherein the RGB pixels are arranged side by side.
3. The method as claimed in claim 1 ,
wherein each pixel of the display panel comprises an RGBY pixel with red green blue and yellow sub-pixels,
wherein the red green blue and yellow sub-pixels extend in the column direction,
wherein the RGBY pixels are arranged side by side.
4. The method as claimed in claim 1 , wherein c=3 and A=9.
5. The method as claimed in claim 4 , wherein the display panel has a resolution of 7680×4320 RGB pixels.
6. The method as claimed in claim 1 , wherein c=4 and A=9.
7. The method as claimed in claim 6 , wherein the display panel has a resolution of 7680×4320 RGB pixels.
8. The method as claimed in claim 1 , wherein c=3 and A=16.
9. The method as claimed in claim 8 , wherein the display panel has a resolution of 7680×4320 RGBY pixels.
10. The method as claimed in claim 1 , wherein c=4 and A=16.
11. The method as claimed in claim 10 , wherein the display panel has a resolution of 7680×4320 RGBY pixels.
12. The method device as claimed in claim 1 , wherein the columns of pixels are parallel to a side edge of the display panel.