Autostereoscopic image output device
View Patent ↗An autostereoscopic image output device includes an image panel having an array of image pixels defining an image, the image pixels being arranged in rows and columns. An array of parallel lenticular elements is positioned over the image panel, the lenticular elements having optical focal axes that are slanted at an angle (ϕ) to the image pixel columns. The image output device is operable in first and second modes, with the image panel and lenticular element array rotated by 90 degrees between the modes, thereby providing a landscape mode of operation and a portrait mode of operation, the slant angle ϕ in the landscape mode satisfies: 1≥ϕ≥1/2.
1. An autostereoscopic image output device comprising:
an image panel having image pixels defining an image, the image pixels being arranged in rows and columns, the rows being longer than the columns; and
lenticular elements parallel to each other and positioned over the image panel, the lenticular elements having optical focal axes that are slanted at a slant angle ϕ to the image pixel columns,
wherein the image output device is operable in first and second modes, with the image panels and the lenticular elements rotated by 90 degrees between the first and second modes to provide a landscape mode of operation and a portrait mode of operation, and
wherein the slant angle ϕ in the landscape mode is a function of an effective width to height ratio of the pixels and satisfies:
tan ϕ≈2R, R being the effective width to height ratio of the pixels.
2. The autostereoscopic image output device of claim 1 , wherein the slant angle ϕ in the landscape mode satisfies tan ϕ≈2/3.
3. The autostereoscopic image output device of claim 1 , wherein the slant angle ϕ in the landscape mode satisfies 1≥tan ϕ≈0.6.
4. The autostereoscopic image output device of claim 1 , wherein the slant angle ϕ in the landscape mode satisfies 1≥tan ϕ≈0.5.
5. The autostereoscopic image output device of claim 1 , wherein the image panel comprises a display device, and the image pixels comprise display pixel areas.
6. The autostereoscopic image output device of claim 5 , wherein the display pixel areas have a rectangular shape.
7. The autostereoscopic image output device of claim 5 , wherein each lenticular element of the lenticular elements overlies a plurality of display pixels in the row direction of the rows when in the landscape mode or the portrait mode.
8. The autostereoscopic image output device of claim 1 , wherein the ratio in landscape mode is 1:3.
9. The autostereoscopic image output device of claim 1 , wherein the rows and the columns of the image pixels are orthogonal.
10. The autostereoscopic image output device of claim 1 , wherein the lenticular elements are configured to provide a plurality of views at a plurality of different horizontal distances between a center of a pixel of the image panel of pixels and a lens axis of a lenticular element of the lenticular elements, and wherein the plurality of different horizontal distances are integer values times a column pitch, and correspond to the plurality of views.
11. An autostereoscopic device comprising:
a panel rotatable by 90 degrees to provide autostereoscopic effects in landscape and portrait modes of operation, the panel including:
an orthogonal array of pixels arranged in rows and columns, each pixel having a pixel display area including a width in a direction of the rows longer than a height in a direction of the columns; and
lenticular elements parallel to each other and positioned over the image panel, the lenticular elements having optical focal axes that are slanted at a slant angle ϕ to the image pixel columns,
wherein the slant angle ϕ in the landscape mode is a function of an effective width to height ratio of the pixels and satisfies:
tan ϕ≈2R, R being the effective width to height ratio of the pixels.
12. The autostereoscopic image output device of claim 11 , wherein the slant angle ϕ in the landscape mode satisfies tan ϕ≈2/3.
13. The autostereoscopic image output device of claim 11 , wherein the slant angle ϕ in the landscape mode satisfies 1≥tan ϕ≈0.6.
14. The autostereoscopic image output device of claim 11 , wherein the slant angle ϕ in the landscape mode satisfies 1≥tan ϕ≈0.5.
15. The autostereoscopic image output device of claim 11 , wherein the pixel display pixel area has a rectangular shape.
16. The autostereoscopic image output device of claim 11 , wherein each lenticular element of the lenticular elements overlies a plurality of pixels of the orthogonal array of pixels in the direction of the rows when in the landscape mode or the portrait mode.
17. The autostereoscopic image output device of claim 11 , wherein the ratio in landscape mode is 1:3.
18. The autostereoscopic image output device of claim 11 , wherein the lenticular elements are configured to provide a plurality of views at a plurality of different horizontal distances between a center of a pixel of the panel and a lens axis of a lenticular element of the lenticular elements, and wherein the plurality of different horizontal distances are integer values times a column pitch, and correspond to the plurality of views.