Display apparatus, variable parallax barrier module, and display method

1. A display apparatus, comprising:

a display module configured to provide a light beam;

a variable parallax barrier module disposed on a transmission path of the light beam, the variable parallax barrier module respectively forming a plurality of different parallax barrier patterns during different display periods of a frame time, each of the parallax barrier patterns comprising a plurality of light-transmissive regions and a plurality of light-shielding regions alternately arranged along an arrangement direction, wherein any two adjacent light-transmissive regions in the light-transmissive regions of the parallax barrier patterns partially overlap each other, and the variable parallax barrier module comprises a plurality of first switching units and a plurality of second switching units alternately arranged along the arrangement direction, and in each of the display periods, each of the first switching units in a portion of the first switching units and two of the second switching units adjacently located at two sides of the each of the first switching units in the portion of the first switching units are switched into a light-transmissive state so as to form the light-transmissive regions, while the remaining first switching units and the remaining second switching units are switched into a light-shielding state so as to form the light-shielding regions; and

a control unit enabling a plurality of display images displayed by the display module during the display periods to respectively correspond with the parallax barrier patterns.

2. The display apparatus as recited in claim 1 , wherein a width of each of the first switching units in the arrangement direction is different from a width of second switching units in the arrangement direction.

3. The display apparatus as recited in claim 1 , wherein the variable parallax barrier module comprises a plurality of strip-shaped pixels arranged along the arrangement direction, each of the first switching units comprises a plurality of strip-shaped pixels in a portion of the strip-shaped pixels, and each of the second switching units comprises a plurality of strip-shaped pixels in another portion of the strip-shaped pixels.

4. The display apparatus as recited in claim 1 , wherein the control unit is configured to control the variable parallax barrier module to switch all the first switching units and all the second switching units to the light-transmissive state, and configured to control the display module to display two-dimensional images so that lights emitted by the two-dimensional images pass through all the first switching units and all the second switching units in the light-transmissive state.

5. The display apparatus as recited in claim 1 , wherein the display apparatus satisfies

D

D

+

d

⁢

S

<

W

1

+

2

⁢

W

2

≤

(

2

-

r

)

⁢

S

⁢

⁢

D

D

+

d

⁢

⁢

and

0

<

W

2

≤

(

1

-

r

)

⁢

S

⁢

⁢

D

D

+

d

,

⁢

wherein W 1 is a width of each of the first switching units in the arrangement direction, W 2 is a width of each of the second switching units in the arrangement direction, S is a width of each of display pixels of the display module in the arrangement direction, r is a ratio of a width of a light-emitting region of each of the display pixels in the arrangement direction to the width of each of the display pixels in the arrangement direction, d is a distance between the display pixels and the variable parallax barrier module, D is an optimum viewing distance from the variable parallax barrier module to a plurality of viewing zones, and a pitch of the first switching units in the arrangement direction is substantially DS/(D+d).

6. The display apparatus as recited in claim 1 , wherein the display image displayed by the display module in each of the display periods comprises a plurality of viewing zone image sets sequentially staggered along the arrangement direction, and lights emitted by the viewing zone image set, after passing through the variable parallax barrier module, are respectively transmitted to a plurality of different viewing zones.

7. The display apparatus as recited in claim 6 , wherein a display position of each of the viewing zone image sets on the display module during the different display periods is different.

8. The display apparatus as recited in claim 6 , wherein the same viewing zone image set is transmitted to the same viewing zone during the different display periods.

9. The display apparatus as recited in claim 1 , wherein the light beam carries the display images.

10. A variable parallax barrier module, comprising:

a plurality of switching units arranged along an arrangement direction; and

a drive unit driving the switching units to from a plurality of different parallax barrier patterns during different display periods, wherein each of the parallax barrier patterns comprises a plurality of light-transmissive regions and a plurality of light-shielding regions alternately arranged along the arrangement direction, and in all the parallax barrier patterns, any two adjacent light-transmissive regions partially overlap each other, and the switching units comprise a plurality of first switching units and a plurality of second switching units alternately arranged along the arrangement direction, and in each of the display periods, each of the first switching units in a portion of the first switching units and two of the second switching units adjacently located at two sides of the each of the first switching units in the portion of the first switching units are switched into a light-transmissive state so as to form the light-transmissive regions, while the remaining first switching units and the remaining second switching units are switched into a light-shielding state so as to form the light-shielding regions.

11. The variable parallax barrier module as recited in claim 10 further comprising a plurality of strip-shaped pixels arranged along the arrangement direction, wherein each of the first switching units comprises a plurality of strip-shaped pixels in a portion of the strip-shaped pixels, and each of the second switching units comprises a plurality of strip-shaped pixels in another portion of the strip-shaped pixels.

12. The variable parallax barrier module as recited in claim 10 , wherein a width of each of the first switching units in the arrangement direction is different from a width of the second switching units in the arrangement direction.

13. A display method, comprising:

providing a light beam by a display module;

forming a plurality of different parallax barrier patterns on a transmission path of the light beam respectively during different display periods, wherein each of the parallax barrier patterns comprises a plurality of light-transmissive regions and a plurality of light-shielding regions alternately arranged along an arrangement direction, and in all the parallax barrier patterns, any two adjacent light-transmissive regions partially overlap each other,

wherein a method for forming the light-transmissive regions and the light-shielding regions comprise:

switching a plurality of first switching units and a plurality of second switching units alternately arranged along the arrangement direction between a light-transmissive state and a light-shielding state, wherein in each of the display periods, each of the first switching units in a portion of the first switching units and two of the second switching units adjacently located at two sides of the each of the first switching units in a portion of the first switching units are switched into the light-transmissive state, while the remaining first switching units and the remaining second switching units are switched into the light-shielding state; and

causing a plurality of display images displayed by the display module during the display periods to respectively correspond to the parallax barrier patterns.

14. The display method as recited in claim 13 , wherein a width of each of the first switching units in the arrangement direction is different from a width of second switching units in the arrangement direction.

15. The display method as recited in claim 13 , wherein a method for switching each of the first switching units and each of the second switching units between the light-transmissive state and the light-shielding state comprises:

switching a plurality of strip-shaped pixels in each of the first switching units and a plurality of strip-shaped pixels in each of the second switching units.

16. The display method as recited in claim 13 further comprising:

switching all the first switching units and all the second switching units into the light-transmissive state; and

controlling the display module to display two-dimensional images, so that lights emitted by the two-dimensional images pass through all the first switching units and all the second switching unit in the light-transmissive state.

17. The display method as recited in claim 13 further comprising satisfying following formulae:

D

D

+

d

⁢

S

<

W

1

+

2

⁢

W

2

≤

(

2

-

r

)

⁢

S

⁢

⁢

D

D

+

d

⁢

⁢

and

0

<

W

2

≤

(

1

-

r

)

⁢

S

⁢

⁢

D

D

+

d

,

⁢

wherein W 1 is a width of each of the first switching units in the arrangement direction, W 2 is a width of each of the second switching units in the arrangement direction, S is a width of each of the display pixels of the display module in the arrangement direction, r is a ratio of a width of a light-emitting region of each of the display pixels in the arrangement direction to the width of each of the display pixels in the arrangement direction, d is a shortest distance between the display pixels and the variable parallax barrier module, D is an optimum viewing distance from the variable parallax barrier module to a plurality of viewing zones, and a pitch of the first switching units in the arrangement direction is substantially DS/(D+d).

18. The display method as recited in claim 13 further comprising:

enabling the display module to display a plurality of viewing zone image sets sequentially staggered along the arrangement direction during each of the display periods, and to respectively transmit the viewing zone image sets to a plurality of different viewing zones.

19. The display method as recited in claim 18 , wherein a display position of each of the viewing zone image sets on the display module during the different display periods is different.

20. The display method as recited in claim 18 , wherein during the different display periods, the same viewing zone image set is transmitted to the same viewing zone.

21. The display method as recited in claim 13 , wherein the light beam carries the display images.