Autostereoscopic display apparatus and method

• US 8,953,241 B2
• Filed: 11/24/2010
• Issued: 02/10/2015
• Est. Priority Date: 10/19/2010
• Status: Active Grant

• Current Assignee: Superb Technology Co Ltd
• Original Assignee: Superd Co., Ltd.
• Inventors: Song, Lei
• Primary Examiner(s): Choi, William
• Assistant Examiner(s): BROOME, SHARRIEF I
• Application Number:
  US12/953,621
• Publication Number:
  US 20120092763A1
• Time in Patent Office: 1,539 Days
• Field of Search: 359619-628, 359/423, 359/462, 359/473, 359/475, 359376-378, 348 55- 56, 348/59, 353/7
• US Class Current: 359/463
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/29 characterised by the geometry of the lenticular array, e.g. slanted arrays, irregular arrays or arrays of varying shape or size
• CPC Class Codes: G02B 30/32 characterised by the geometry of the parallax barriers, e.g. staggered barriers, slanted parallax arrays or parallax arrays of varying shape or size
• CPC Class Codes: H04N 13/305 using lenticular lenses, e.g. arrangements of cylindrical lenses
• CPC Class Codes: H04N 13/312 the parallax barriers being placed behind the display panel, e.g. between backlight and spatial light modulator [SLM]
• CPC Class Codes: H04N 13/317 using slanted parallax optics

Abstract

An autostereoscopic display apparatus is provided for three-dimensional (3D) display. The autostereoscopic display apparatus includes a display panel having a plurality of display elements arranged in a two-dimensional array. The autostereoscopic display apparatus also includes a grating device coupled to the display device and having a plurality of grating elements to guide lights associated with 3D display into predetermined viewing directions. Further, the plurality of grating elements cover the plurality of display elements and are tilted such that a tilted direction of the plurality of grating elements form a non-zero angle with respect to a diagonal direction of the plurality display elements.

Claims

1. A three-dimensional (3D) display apparatus for displaying a 3D image, comprising:

a display panel having a plurality of display pixels arranged in a two-dimensional array, wherein the plurality of display pixels include a first set of display pixels displaying a first view point image of the 3D image and a second set of display pixels displaying a second view point image of the 3D image; and

a grating device coupled to the display panel and having a plurality of grating elements to guide lights associated with the plurality of display pixels into predetermined viewing directions,

wherein;

the grating device is one of a lenticular lens grating and a slit grating;

the plurality of grating elements cover the plurality of display pixels and are tilted by rotating a ridge line direction of the plurality of grating elements with respect to a diagonal direction of the plurality display pixels by a non-zero angle from a direction parallel to the diagonal direction such that a tilted direction of the plurality of grating elements forms the non-zero angle with respect to the diagonal direction of the plurality display pixels to reduce Moire patterns based on irregularity caused by the rotated ridge line direction;

a controller of the 3D display apparatus re-calculates a display value of a display pixel from the first set of display pixels based on an original value of the display pixel and an original value of a neighboring display pixel from the second set of display pixels,

wherein, provided that x and y are integers, the controller of the 3D display apparatus associates a decimal number x.y with a display pixel for re-calculating the value of the display pixel and re-calculates the display value of the display pixel according to the decimal number x.y, wherein x indicates which number of view point image of the 3D image the display pixel is from and y indicates a percentage of the display value of a neighboring display pixel from a different view point image to be included in the display value of the display pixel.

2. The 3D display apparatus according to claim 1, wherein

the plurality of grating elements are arranged in parallel to one another.

3. The 3D display apparatus according to claim 1, wherein

the plurality of grating elements have a same pitch value.

4. The 3D display apparatus according to claim 1, wherein

with the diagonal direction being a reference, the non-zero angle between the tilted direction and the diagonal direction is set between approximately 10 degrees clockwise to 5degrees counter-clockwise.

5. The 3D display apparatus according to claim 1, wherein

with the diagonal direction being a reference, the non-zero angle between the tilted direction and the diagonal direction is set between approximately 7 degrees clockwise to 2 degrees counter-clockwise.

6. The 3D display apparatus according to claim 1, wherein

the plurality of grating elements are further shifted horizontally such that the ridge lines of the plurality of grating elements have an offset with respect to the diagonal lines of the plurality display elements.

7. The 3D display apparatus according to claim 1, wherein

the second view point image is a neighboring view point image of the first view point image along the tilted direction of the plurality of grating elements.

8. The 3D display apparatus according to claim 1, further including:

a backlight panel configured to provide lights for the display panel, wherein the grating is positioned between the backlight panel and the display panel.

20. The 3D display apparatus according to claim 1, wherein:

the plurality of display pixels further include a third set of display pixels displaying a third view point image of the 3D image; and

the controller of the 3D display apparatus re-calculates a display value of a display pixel from the second set of display pixels based on an original value of the display pixel and an original value of a neighboring display pixel from the third set of display pixels.

21. The 3D display apparatus according to claim 20, wherein:

the controller of the 3D display apparatus re-calculates display values of the first set of display pixels using gray scalar values such as to reduce irregularities caused by a particular angle of arrangement between the grating device and the display panel.

22. The 3D display apparatus according to claim 21, wherein:

the controller of the 3D display apparatus re-calculates the display values of the first set of display pixels based on multiple view point images.

23. The 3D display apparatus according to claim 21, wherein:

more than one sets of re-calculated display values of the first set of display pixels are predetermined and stored in the 3D display apparatus; and

the controller of the 3D display apparatus select a particular set of re-calculated display values of the first set of display pixels through user input.

9. A grating device for use in a three-dimensional (3D) display apparatus having a display panel having a plurality of display pixels arranged in a two-dimensional array, comprising:

a plurality of grating elements configured to cover the plurality of display elements to guide lights associated with the plurality of display pixels into predetermined viewing directions,

wherein;

the plurality of display pixels include a first set of display pixels displaying a first view point image of the 3D image and a second set of display pixels displaying a second view point image of the 3D image;

the grating device is one of a lenticular lens grating and a slit grating;

the plurality of grating elements cover the plurality of display pixels and are tilted by rotating a ridge line direction of the plurality of grating elements with respect to a diagonal direction of the plurality display pixels by a non-zero angle from a direction parallel to the diagonal direction such that a tilted direction of the plurality of grating elements forms the non-zero angle with respect to the diagonal direction of the plurality display pixels to reduce Moire patterns based on irregularity caused by the rotated ridge line direction;

a controller of the 3D display apparatus re-calculates a display value of a display pixel from the first set of display pixels based on an original value of the display pixel and an original value of a neighboring display pixel from the second set of display pixels,

wherein, provided that x and y are integers, the controller of the 3D display apparatus associates a decimal number x.y with a display pixel for re-calculating the value of the display pixel and re-calculates the display value of the display pixel according to the decimal number x.y, wherein x indicates which number of view point image of the 3D image the display pixel is from and y indicates a percentage of the display value of a neighboring display pixel from a different view point image to be included in the display value of the display pixel.

10. The grating according to claim 9, wherein

the plurality of grating elements are arranged in parallel to one another.

11. The grating according to claim 9, wherein

the plurality of grating elements have a same pitch value.

12. The grating according to claim 9, wherein

with the diagonal direction being a reference, the non-zero angle between the tilted direction and the diagonal direction is set between approximately 10 degrees clockwise to 5degrees counter-clockwise.

13. The grating according to claim 9, wherein

with the diagonal direction being a reference, the non-zero angle between the tilted direction and the diagonal direction is set between approximately 7 degrees clockwise to 2 degrees counter-clockwise.

14. The grating according to claim 9, wherein

the plurality of grating elements are further shifted horizontally such that the ridge lines of the plurality of grating elements have an offset with respect to the diagonal lines of the plurality display elements.

15. A grating for use in three-dimensional (3D) display apparatus having a display panel having a plurality of display pixels arranged in a two-dimensional array and the plurality of display elements being separated by a plurality of mask lines formed in a mask line grid, comprising:

a plurality of grating elements configured to cover the plurality of display elements to guide lights associated with the plurality of display pixels into predetermined viewing directions,

wherein;

the plurality of display pixels include a first set of display pixels displaying a first view point image of the 3D image and a second set of display pixels displaying a second view point image of the 3D image;

the grating is one of a lenticular lens grating and a slit grating;

the plurality of grating elements cover the plurality of display pixels and are tilted by rotating a ridge line direction of the plurality of grating elements with respect to a diagonal direction of the plurality display pixels by a non-zero angle from a direction parallel to the diagonal direction such that a tilted direction of the plurality of grating elements forms the non-zero angle with respect to the diagonal direction of the plurality display pixels to reduce Moire patterns based on irregularity caused by the rotated ridge line direction;

a controller of the 3D display apparatus re-calculates a display value of a display pixel from the first set of display pixels based on an original value of the display pixel and an original value of a neighboring display pixel from the second set of display pixels,

wherein, provided that x and y are integers, the controller of the 3D display apparatus associates a decimal number x.y with a display pixel for re-calculating the value of the display pixel and re-calculates the display value of the display pixel according to the decimal number x.y, wherein x indicates which number of view point image of the 3D image the display pixel is from and y indicates a percentage of the display value of a neighboring display pixel from a different view point image to be included in the display value of the display pixel.

16. A method for use in a three-dimensional (3D) display apparatus having a display panel having a plurality of display elements arranged in a two-dimensional array, wherein the plurality of display pixels include a first set of display pixels displaying a first view point image of the 3D image and a second set of display pixels displaying a second view point image of the 3D image, the method comprising:

covering the plurality of display pixels using a plurality of grating elements of a grating, wherein the grating device is one of a lenticular lens grating and a slit grating;

configuring the plurality of grating elements to be tilted by rotating a ridge-line direction of the plurality of grating elements with respect to a diagonal direction of the plurality display pixels by a non-zero angle from a direction parallel to the diagonal direction such that a tilted direction of the plurality of grating elements forms the non-zero angle with respect to the diagonal direction of the plurality display pixels to reduce Moire patterns based on irregularity caused by the rotated ridge line direction;

re-calculating, by a controller of the 3D display apparatus, a display value of a display pixel from the first set of display pixels based on an original value of the display pixel and an original value of a neighboring display pixel from the second set of display pixels; and

guiding lights associated with the plurality of display pixels into predetermined viewing directions by the plurality of grating elements.

17. The method according to claim 16, wherein

with the diagonal direction being a reference, the non-zero angle between the tilted direction and the diagonal direction is set between approximately 10 degrees clockwise to 5degrees counter-clockwise.

18. The method according to claim 16, wherein

with the diagonal direction being a reference, the non-zero angle between the tilted direction and the diagonal direction is set between approximately 7 degrees clockwise to 2 degrees counter-clockwise.

19. The method according to claim 16, further comprising:

configuring the plurality of grating elements to be further shifted horizontally such that the ridge lines of the plurality of grating elements have an offset with respect to the diagonal lines of the plurality display pixels.