Near-to-eye display device
Provided is a near-to-eye display device, comprising: a display panel, a light-splitting layer on a light-exit side of the display panel, an imaging lens group on the side of the light-splitting layer away from the display panel, a phase delay layer on the side of the display panel away from the light-splitting layer, a transflective layer on the side of phase delay layer away from display panel. The display panel comprises multiple display units, some of which emit first linearly-polarized light, the others emit second linearly-polarized light; first linearly-polarized light transmits through the light-splitting layer and is imaged on a first focal plane by the imaging lens group, second linearly-polarized light is reflected by the light-splitting layer and transflective layer, is subjected to polarization state transition through the phase delay layer, finally transmits through light-splitting layer and is imaged on a second focal plane by the imaging lens group.
1 . A near-eye display apparatus, comprising:
a display panel, configured to display an image, wherein the display panel comprises a plurality of display units, a part of the display units emits first linearly polarized light, and the rest of the display units emits second linearly polarized light; polarization directions of the first linearly polarized light and the second linearly polarized light are perpendicular to each other;
a light splitting layer, located on a light exit side of the display panel and configured to transmit the first linearly polarized light and reflect the second linearly polarized light;
a semi-transparent and semi-reflective layer, located on a side of the display panel away from the light splitting layer;
a phase delay layer, located on the side of the display panel away from the light splitting layer and between the display panel and the semi-transparent and semi-reflective layer, and configured to convert the second linearly polarized light reflected by the light splitting layer into circularly polarized light and convert circularly polarized light reflected by the semi-transparent and semi-reflective layer into first linearly polarized light; and
an imaging lens group, located on the light exit side of the display panel and a side of the light splitting layer away from the display panel;
wherein the light splitting layer is located between the display panel and the imaging lens group.
2 . The near-eye display apparatus according to claim 1 , wherein the display panel comprises:
a base substrate;
a plurality of pixel islands, arranged in an array on a side of the base substrate; and
a polarization layer, located on a side of the pixel islands away from the base substrate;
wherein one pixel island and a polarization layer corresponding to the pixel island constitute one display unit, and the pixel island comprises a plurality of pixel units, one of which comprises a plurality of sub-pixel units with different colors; and
the pixel island is classified as a first pixel island and a second pixel island, wherein polarization directions of a polarization layer corresponding to the first pixel island and a polarization layer corresponding to the second pixel island are perpendicular to each other.
3 . The near-eye display apparatus according to claim 2 , wherein the first pixel island and the second pixel island are alternately arranged in a first direction and a second direction; and the first direction intersects with the second direction.
4 . The near-eye display apparatus according to claim 2 , wherein there is a gap between adjacent pixel islands.
5 . The near-eye display apparatus according to claim 4 , wherein a size of the pixel island is 0.5 mm to 2 mm; and a width of the gap between the adjacent pixel islands is 0.5 mm to 1.5 mm.
6 . The near-eye display apparatus according to claim 4 , wherein a width of the gap between the pixel islands is smaller than the size of the pixel island.
7 . The near-eye display apparatus according to claim 2 , wherein the display panel further comprises an encapsulation structure, the polarization layer is formed on a surface of the encapsulation structure.
8 . The near-eye display apparatus according to claim 2 , wherein the display panel further comprises an encapsulation structure, the polarization layer is formed inside the encapsulation structure.
9 . The near-eye display apparatus according to claim 1 , wherein the display panel is one of an organic light emitting diode display panel, a micro organic light emitting diode display panel, and a micro light emitting diode display panel.
10 . The near-eye display apparatus according to claim 1 , wherein the light splitting layer is one of a reflective polarizer or a metal wire grid polarizer.
11 . The near-eye display apparatus according to claim 1 , wherein the phase delay layer is a quarter-wave plate, and an included angle between an optical axis of the quarter-wave plate and a polarization direction of the first linearly polarized light and an included angle between the optical axis of the quarter-wave plate and a polarization direction of the second linearly polarized light are both 45°.
12 . The near-eye display apparatus according to claim 1 , wherein a ratio of a reflectivity to a transmittance of the semi-transparent and semi-reflective layer is 1:1.
13 . The near-eye display apparatus according to claim 1 , wherein the imaging lens group comprises at least one lens, a surface shape of which is one of a spherical surface, an aspherical surface, a Fresnel surface, or a free-form surface.
14 . The near-eye display apparatus according to claim 13 , wherein a distance between the display panel and the imaging lens group is less than a focal length of the imaging lens group.
15 . The near-eye display apparatus according to claim 1 , wherein the light splitting layer is attached to a surface of the light exit side of the display panel, the phase delay layer is attached to a surface of a side of the display panel away from the light splitting layer, and the semi-transparent and semi-reflective layer is attached to a surface of a side of the phase delay layer away from the display panel.
16 . The near-eye display apparatus according to claim 1 , wherein the near-eye display apparatus is an augmented reality display apparatus.
17 . The near-eye display apparatus according to claim 1 , wherein the first linearly polarized light transmitted by the light splitting layer is imaged on a first focal plane by the imaging lens group; and the first linearly polarized light converted by the phase delay layer is imaged on a second focal plane by the imaging lens group.
18 . The near-eye display apparatus according to claim 17 , wherein the first focal plane is a near focal plane, and the second focal plane is a far focal plane.