Multi-view autostereoscopic display and method for controlling optimal viewing distance thereof

Patent metadata

Field	Value
Publication number	US-9838674-B2
Application number	US-201314109655-A
Country	US
Kind code	B2
Filing date	Dec 17, 2013
Priority date	Dec 18, 2012
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A display including an optical element disposed on a pixel array of a display panel; an optimal viewing distance control device configured to adjust primary view images seen through both eyes of a viewer to a first view image and second view image based on a viewer's position information sensed by a sensor, to automatically adjust other view images between the primary view images to view images separated at regular intervals, and to produce a view map using the adjusted primary view images and the adjusted other view images between the primary view images; a 3D formatter configured to map pixel data of a multi-view image based on the view map received from the optimal viewing distance control device; and a display panel driving circuit configured to write the pixel data of the multi-view image received from the 3D formatter to the display panel.

First claim

What is claimed is:

1. A display comprising:
an optical element disposed on a pixel array of a display panel;
an optimal viewing distance control device configured to adjust primary view images seen through both eyes of a viewer to a first view image and second view image based on a viewer's position information sensed by a sensor, to automatically adjust other view images between the primary view images to view images separated at regular intervals, and to produce a view map using the adjusted primary view images and the adjusted other view images between the primary view images, wherein the primary view images are adjusted to primary view images represented by a decimal that is determined based on a position of a subpixel the viewer sees and a pixel pitch;
a 3D formatter configured to map pixel data of a multi-view image based on the view map received from the optimal viewing distance control device; and
a display panel driving circuit configured to write the pixel data of the multi-view image received from the 3D formatter to the display panel,
wherein the optimal viewing distance control device includes a light path backtracking unit configured to calculate a position of a subpixel the viewer sees, and
wherein the light path backtracking unit is further configured to calculate a refractive angle (θ n ) and a position (x n ) of a subpixel the viewer sees using the following Equations:

θ
n

=

90
∘

-

sin

-
1

(

sin
⁡

(

90
∘

-

θ
i

)

1.5

)

x
n

=

tan
⁢

⁢

θ
n

·
p
·
l

-
S

tan
⁢

⁢

θ
n

where ‘θi’ is an incident angle of the optical element, ‘p’ is a pixel pitch, ‘l’ is a variable indicating a position of the optical element based on the center of the pixel array of the display panel, and ‘S’ is a back length between the display panel and the optical element.

2. The display of claim 1 , wherein the optimal viewing distance control device is further configured to update the view map each time the viewer moves from side to side along an x-axis on a same plane as a screen of the display panel or moves forward or backward along a distance of a z-axis between the screen of the display panel and the viewer.

3. The display of claim 2 , wherein the optimal viewing distance control device includes:
a primary view setting unit configured to adjust the primary view images to be displayed at the position of the subpixel calculated by the light path backtracking unit to the first view image and the second view image; and
a view map adjustment unit configured to adjust the view images other than the primary view images to view numbers separated between the primary view images at regular intervals and to produce the view map.

4. The display of claim 3 , wherein the primary view setting unit is further configured to calculate a distance (D) ranging from a center position of a subpixel to a position of the subpixel, out of the center position of the subpixel, to primary view images (View new ) represented by a decimal using the following Equation:

View
new

=

0.5
×
pixel
⁢

⁢
pitch

-
D

pixel
⁢

⁢
pitch

+

View
′

D
=

x
n

-

p
c

where ‘x n ’ is the position of the subpixel the viewer sees, ‘p c ’ is the center position of the subpixel, and View′ is a view number of the primary view image.

5. The display of claim 4 , wherein the view map adjustment unit is further configured to separate other view images between the primary view images at regular intervals and to calculate the other view images using the following Equation:

View
new_k

=

View
⁢

⁢
2

+

k
×

(

(

View
⁢

⁢
1

+
N

)

-

View
⁢

Assignees

• Lg Display Co Ltd

Inventors

• Cho Seongho
• Lee Keongjin

Classifications

• G02B30/00

  Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images (in microscopes G02B21/22) · CPC title

• H04N13/317

  using slanted parallax optics · CPC title

• H04N13/356

  having separate monoscopic and stereoscopic modes · CPC title

• H04N13/305 Primary

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

• H04N13/366

  using viewer tracking · CPC title