A display device includes an image display, a first lens element, and a second lens element. The image display includes a plurality of pixels, and displays parallax images corresponding to each of N1 viewpoints (where N1 is an integer of 2 or greater) along a predetermined direction and parallax images corresponding to each of N2 viewpoints (where N2 is an integer greater than N1) along the predetermined direction. When the parallax images corresponding to each of the N1 viewpoints are displayed on the image display, the first lens element divides light emitted from the plurality of pixels among the N1 viewpoints. When the parallax images corresponding to each of the N2 viewpoints are displayed on the image display 10 , the second lens element divides light emitted from the plurality of pixels among each of the N2 viewpoints.
1 . A display device, comprising:
an image display that includes a plurality of pixels, and that displays parallax images corresponding to each of N1 viewpoints along a predetermined direction and parallax images corresponding to each of N2 viewpoints along the predetermined direction, N1 being an integer of 2 or greater and N2 being an integer greater than N1;
a first lens element that is stacked on the image display and that, when the parallax images corresponding to each of the N1 viewpoints are displayed on the image display, divides light, emitted from the plurality of pixels displaying each of the parallax images, among each of the N1 viewpoints corresponding to each of the parallax images; and
a second lens element that is stacked on the image display and that, when the parallax images corresponding to each of the N2 viewpoints are displayed on the image display, divides the light, emitted from the plurality of pixels displaying each of the parallax images, among each of the N2 viewpoints corresponding to each of the parallax images, wherein
the second lens element is disposed on a display surface side of the image display, and
when a lens pitch of the first lens element is Lp1, a lens pitch of the second lens element is Lp2, and a pixel pitch in the predetermined direction of the plurality of pixels is P,
Lp
1
×
N
2
N
1
>
Lp
2
>
(
N
2
-
1
)
×
P
(
1
)
is satisfied.
2 . The display device according to claim 1 , wherein
the first lens element is disposed on the display surface side of the image display, and
when a gap between an apex of a lens of the first lens element and the pixels is H1, a viewpoint pitch of the N1 viewpoints is e1, a gap between an apex of a lens of the second lens element and the pixels is H2, and a viewpoint pitch of the N2 viewpoints is e2,
H
2
=
H
1
×
(
e
1
+
P
)
e
2
+
P
(
2
)
Lp
2
=
N
2
×
N
1
×
P
×
(
e2
-
e
1
)
+
Lp
1
×
(
e
1
+
P
)
N
1
×
(
e
2
+
P
)
(
3
)
are satisfied.
3 . The display device according to claim 1 , wherein
the first lens element is disposed on a side opposite the display surface side of the image display, and
N
2
×
P
×
L
p
1
2
×
L
p
1
-
N
1
×
P
>
Lp
2
>
(
N
2
-
1
)
×
P
(
4
)
is satisfied.
4 . A display device, comprising:
an image display that includes a plurality of pixels, and that displays parallax images corresponding to each of N1 viewpoints along a predetermined direction and parallax images corresponding to each of N2 viewpoints along the predetermined direction, N1 being an integer of 2 or greater and N2 being an integer greater than N1;
a first lens element that is stacked on the image display and that, when the parallax images corresponding to each of the N1 viewpoints are displayed on the image display, divides light, emitted from the plurality of pixels displaying each of the parallax images, among each of the N1 viewpoints corresponding to each of the parallax images; and
a second lens element that is stacked on the image display and that, when the parallax images corresponding to each of the N2 viewpoints are displayed on the image display, divides the light, emitted from the plurality of pixels displaying each of the parallax images, among each of the N2 viewpoints corresponding to each of the parallax images, wherein
the first lens element is disposed on a display surface side of the image display,
the second lens element is disposed on a side opposite the display surface side of the image display, and
when a lens pitch of the first lens element is Lp1, a lens pitch of the second lens element is Lp2, and a pixel pitch in the predetermined direction of the pixels is P,
(
N
2
+
1
)
×
P
>
Lp
2
>
N
2
×
P
×
L
p
1
2
×
L
p
1
-
N
1
×
P
(
5
)
is satisfied.