Display panel, display method thereof and display device

Patent metadata

Field	Value
Publication number	US-2022394236-A1
Application number	US-202117765504-A
Country	US
Kind code	A1
Filing date	May 8, 2021
Priority date	Jun 5, 2020
Publication date	Dec 8, 2022
Grant date	—

Abstract

A display panel, a display method thereof and a display device are provided. The display panel includes cylindrical lens array on light emitting side of display substrate. The display substrate includes back plate, pixel definition layer and sub-pixel unit array on back plate. Each sub-pixel unit is in pixel region defined by pixel definition layer and includes at least two secondary sub-pixels; and cylindrical lenses are corresponding to sub-pixel units, each cylindrical lens has cylindrical surface away from back plate, and focus point on surface of a sub-pixel unit away from back plate. In the display panel, multi-viewpoints parallax 3D display compatible with near-to-eye light field display and 2D display with sub-pixels of same gray scale is achieved, effectively reducing the crosstalk, improving Moire phenomenon and increasing stereo perception of the parallax 3D display and solving visual fatigue due to conflict between monocular focusing and binocular convergence.

First claim

1 . A display panel, comprising a display substrate, a cylindrical lens array comprising cylindrical lenses on a light emitting side of the display substrate,
wherein the display substrate comprises a back plate, a pixel definition layer and a sub-pixel unit array comprising sub-pixel units on the back plate, wherein each of the sub-pixel units is in a pixel region defined by the pixel definition layer and comprises at least two secondary sub-pixels; and the cylindrical lenses are arranged corresponding to the sub-pixel units, each cylindrical lens has a cylindrical surface away from the back plate, and a focus point on a surface of a corresponding sub-pixel unit away from the back plate.

2 . The display panel according to claim 1 , wherein
the secondary sub-pixels are arranged in a first direction; an axis of the cylindrical lens is perpendicular to the first direction; an extending direction of the axis is a second direction; the display substrate has a shape of rectangle, a long side of the display substrate extends along the first direction, and a wide side of the display substrate extends along the second direction; the sub-pixel unit has a shape of rectangle, a long side of the sub-pixel unit extends in the first direction, and a wide side of the sub-pixel unit extends in the second direction; and the secondary sub-pixel has a shape of rectangle, a wide side of the secondary sub-pixel extends in the first direction, and a long side of the secondary sub-pixel extends in the second direction.

3 . The display panel according to claim 2 , wherein
the sub-pixel units in the sub-pixel unit array have the same size and shape; and the secondary sub-pixels in each sub-pixel unit have the same size and shape.

4 . The display panel according to claim 3 , wherein
a main lobe visual angle of the cylindrical lens and a focal length of the cylindrical lens satisfy:

tan
⁢

ω
2

=

Np
y

2
⁢
f

;

α

ω
/
N

=
i

where w is the main lobe visual angle of the cylindrical lens; N is a number of the secondary sub-pixels in the sub-pixel unit; p y is a distance between centers of two adjacent secondary sub-pixels in the sub-pixel unit; f is the focal length of the cylindrical lens; i=1, 2, 3 . . . , i being an integer; and a is an included angle of a pupil distance of human eyes with respect to the display substrate.

5 . The display panel according to claim 4 , wherein
an orthographic projection of the cylindrical lens on the back plate falls within an orthographic projection of the corresponding sub-pixel unit on the back plate; and an aperture of the cylindrical lens satisfies:

D
y

y

=

W
lens

W
panel

=

L

L
+
f

where Dy is the aperture of the cylindrical lens; y is a length of the sub-pixel unit along the first direction; W lens is a length of the cylindrical lens array along the first direction; W panel is a length of the display substrate along the first direction; L is an optimal viewing distance of the display panel during a parallax 3D display; f is the focal length of the cylindrical lens.

6 . The display panel according to claim 5 , further comprising m layers between the cylindrical lens and the sub-pixel unit, wherein
a distance H between a vertex of a cylindrical surface of the cylindrical lens and a surface of the sub-pixel unit away from the back plate, satisfies:
h/n+h 1/ n 1+ h 2/ n 2+ . . . + hm/nm=f; H=h+h 1+ h 2+ . . . + hm,
where h is a thickness of the cylindrical lens, and n is the refractive index of the cylindrical lens; h1 is a thickness of a first layer between the cylindrical lens and the sub-pixel unit, and n1 is a refractive index of the first layer; h2 is a thickness of a second layer between the cylindrical lens and the sub-pixel unit, and n2 is a refractive index of the second layer; hm is a thickness of an m th layer between the cylindrical lens and the sub-pixel unit, and nm is a refractive index of the m th layer; and f is the focal length of the cylindrical lens.

7 . The display panel according to claim 6 , wherein
in the sub-pixel unit array, a spatial projection of views formed by secondary sub-pixels arranged at same positions has a width a y along the first direction in a cross section at the optimal viewing distance for the display panel during the parallax 3D display, which satisfies:

a
y

=

Lt
y

f

;

and
⁢

a
y

≤

e
‵

⁢

Na
y

≥
e

,

where L is the optimal viewing distance for the display panel during the parallax 3D display; t y is a width of the secondary sub-pixel along the first direction; f is the focal length of the cylindrical lens; N is the number of secondary sub-pixels in the sub-pixel unit; e is the pupil distance of the human eyes;
in the sub-pixel unit array, a spatial projection of views formed by adjacent secondary sub-pixels has a pitch b y along the first direction in a cross section at a closest viewing distance for the display panel during the parallax 3D display, which satisfies:

b
y

=

w
y

⁢

a
y

Assignees

• Boe Technology Group Co Ltd

Inventors

• Gao Jian

Classifications

• H04N13/305 Primary

  using lenticular lenses, e.g. arrangements of cylindrical lenses · CPC title

• H04N13/351

  for displaying simultaneously · CPC title

• H04N13/366 Primary

  using viewer tracking · CPC title

• H04N13/356

  having separate monoscopic and stereoscopic modes · CPC title

• H04N13/31

  using parallax barriers · CPC title