Stereoscopic display device

Patent metadata

Field	Value
Publication number	US-9784982-B2
Application number	US-201415026301-A
Country	US
Kind code	B2
Filing date	Aug 20, 2014
Priority date	Oct 1, 2013
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A configuration of a stereoscopic display device that is capable of maintaining crosstalk at a low level even when a viewer moves is provided. A stereoscopic display device ( 1 ) includes: a display panel ( 10 ) for displaying an image; a switch liquid crystal panel ( 20 ) that is arranged so as to be stacked on the display panel ( 10 ); a position sensor for acquiring position information of a viewer; and a control unit for moving a parallax barrier in which transmitting regions and non-transmitting regions are formed in periodic fashion in a predetermined alignment direction, in such a manner that the parallax barrier is moved in the predetermined alignment direction in accordance with the position information, and causing the switch liquid crystal panel ( 20 ) to display the parallax barrier. The switch liquid crystal panel ( 20 ) includes: a liquid crystal layer ( 23 ) in which refractive index anisotropy Δn of liquid crystal molecules is 0.14 or less; a first substrate ( 21 ) and a second substrate ( 22 ) that face each other with the liquid crystal layer ( 23 ) being interposed therebetween; and an electrode group including a plurality of electrodes that are formed on at least one of the first substrate ( 21 ) and the second substrate ( 22 ) and are arranged in the alignment direction.

First claim

The invention claimed is:

1. A stereoscopic display device comprising:
a display panel that displays an image;
a switch liquid crystal panel that is arranged so as to be stacked on the display panel;
a position sensor that acquires position information of a viewer; and
control circuitry that moves a parallax barrier in which transmitting regions and non-transmitting regions are defined in periodic fashion in a predetermined alignment direction, in such a manner that the parallax barrier is moved in the predetermined alignment direction in accordance with the position information, and causes the switch liquid crystal panel to display the parallax barrier, wherein
the switch liquid crystal panel includes:
a liquid crystal layer in which refractive index anisotropy Δn of liquid crystal molecules is 0.14 or less;
a first substrate and a second substrate that face each other with the liquid crystal layer being interposed therebetween; and
an electrode group including a plurality of electrodes that are defined on at least one of the first substrate and the second substrate and are arranged in the alignment direction, and

when no voltage is applied to the liquid crystal layer, an alignment direction of liquid crystal molecules on a side of the first substrate, and an alignment direction of liquid crystal molecules on a side of the second substrate are 90° from each other.

2. The stereoscopic display device according to claim 1 , wherein the switch liquid crystal panel is normally white.

3. The stereoscopic display device according to claim 1 , wherein retardation of the liquid crystal layer is set to a first minimum.

4. The stereoscopic display device according to claim 1 , wherein the liquid crystal layer has a thickness of 5.5 μm or less.

5. The stereoscopic display device according to claim 1 , wherein the electrode group includes:
a first electrode group that includes a plurality of electrodes that are formed on the first substrate and are arranged in the alignment direction at predetermined intervals; and
a second electrode group that includes a plurality of electrodes that are formed on the second substrate and are arranged in the alignment direction at the predetermined intervals, and
the first electrode group and the second electrode group are arranged so as to be deviated with respect to each other by half of the predetermined interval in the alignment direction.

6. The stereoscopic display device according to claim 1 , wherein the electrode group includes:
a first electrode group that includes a plurality of electrode that are formed on the first substrate and arranged in the alignment direction at predetermined intervals; and
a common electrode that is formed on an approximately entire surface of the second substrate.

7. The stereoscopic display device according to claim 1 , wherein the switch liquid crystal panel is arranged on a viewer side with respect to the display panel.

8. The stereoscopic display device according to claim 1 , wherein the display panel is arranged on a viewer side with respect to the switch liquid crystal panel.

9. The stereoscopic display device according to claim 1 , wherein the display panel is a liquid crystal display panel.

10. The stereoscopic display device according to claim 1 , wherein the control circuitry defines the non-transmitting regions by using a plurality of electrodes adjacent in the electrode group.

11. The stereoscopic display device according to claim 10 , wherein the switch liquid crystal panel operates in a normally white mode.

Assignees

• Sharp Kk

Inventors

• Murao Takehiro
• Kikuchi Ryoh
• Yoshino Takuto
• Fukushima Hiroshi

Classifications

• H04N13/398

  Synchronisation thereof; Control thereof · CPC title

• H04N2213/001

  Constructional or mechanical details · CPC title

• H04N13/366

  using viewer tracking · CPC title

• G02B30/27 Primary

  involving lenticular arrays · CPC title

• H04N13/31 Primary

  using parallax barriers · CPC title