Stereoscopic image display device and driving method thereof

Patent metadata

Field	Value
Publication number	US-9229241-B2
Application number	US-201113296984-A
Country	US
Kind code	B2
Filing date	Nov 15, 2011
Priority date	Jul 7, 2011
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

A stereoscopic image display device and a driving method thereof, which correct the viewing position of a viewer in initial driving of a 3D display mode, are discussed. The stereoscopic image display device includes a display module, a barrier module, a position detector, and a position detector. The display module separates a left-eye image and a right-eye image to display a stereoscopic image. The barrier module is disposed in correspondence with the display module, and forms a light transmitting area for transmitting the left-eye image and right-eye image and a light blocking area for blocking the left-eye image and right-eye image. The position detector detects position information on a viewer which views the stereoscopic image displayed on the display module. The position detector corrects positions of the light transmitting area and light blocking area on the basis of viewing position information on the viewer.

First claim

What is claimed is:

1. A stereoscopic image display device comprising:
a display module separating a left-eye image and a right-eye image to display a stereoscopic image;
a barrier module disposed in correspondence with the display module, and forming a light transmitting area for transmitting the left-eye image and right-eye image and a light blocking area for blocking the left-eye image and right-eye image, each of the light transmitting area and the light blocking area including a central portion;
a position detector detecting position information on a viewer which views the stereoscopic image displayed on the display module;
a movement detector detecting movement information on the stereoscopic image display device;
a controller detecting a rotated angle and a rotated direction of the stereoscopic image display device based on the movement information and correcting positions of the light transmitting area and light blocking area based on viewing position information on the viewer, the movement information detected by the movement detector and the rotated angle and the rotated direction of the stereoscopic image display device, the viewing position information corresponding to a central portion between the left-eye image and the right-eye image of the viewer,
wherein the barrier module comprises:
a barrier panel comprising a liquid crystal layer, and a liquid crystal driving electrode part which changes an aligned state of liquid crystal molecules in the liquid crystal layer, and
a barrier driver generating a barrier voltage for forming the light transmitting area and light blocking area in the barrier panel according to a control of the controller based on the viewing position information and the movement information, and applying the barrier voltage to the liquid crystal driving electrode part,
wherein the liquid crystal driving electrode part comprises a plurality of individually addressable lower substrate electrodes formed in a multi-layer structure where the lower substrate electrodes are crossed in a zigzag shape on a first substrate disposed on the display module; and
an upper substrate electrode formed on a second substrate which is coupled to the first substrate with the liquid crystal layer therebetween,
wherein a barrier channel of the barrier panel includes the light blocking area and the light transmitting area, the light blocking area being formed by a change in an alignment of the liquid crystal molecules according to the barrier voltage from the barrier driver that is individually addressed to the lower substrate electrodes so that a certain number of the lower substrate electrodes are collectively formed as the light blocking area, the light transmitting area being formed by a remaining area of the barrier channel where there is no alignment change of the liquid crystal molecules, and the barrier channel being variably overlapped over both a left-eye pixel and a right-eyed pixel, and
wherein the central portion between the left-eye image and the right-eye image of the viewer is corrected so that the central portion between the left-eye image and the right-eye image of the viewer is matched with the central portion of one of the light transmitting area and the light blocking area by the corrected positions of the light transmitting area and light blocking area.

2. The stereoscopic image display device according to claim 1 , wherein the position detector detects one of eyes, eyeball, and eyebrows of the viewer to detect the viewing position information.

3. The stereoscopic image display device according to claim 1 , wherein the plurality of lower substrate electrodes are formed in a double-layer structure with an insulation layer therebetween, the lower substrate electrodes formed on the insulation layer are respectively formed between the lower substrate electrodes formed on the first substrate; and
wherein the upper substrate electrode receives a common voltage from the barrier driver.

4. The stereoscopic image display device according to claim 3 , wherein,
the controller generates first voltage change information for changing a state of the barrier voltage applied to the lower substrate electrodes on the basis of the viewing position information such that the light transmitting area and light blocking area are accurately disposed at the viewing position of the viewer, and
the barrier driver changes a state of the barrier voltage applied to the lower substrate electrodes, according to the first voltage change information.

5. The stereoscopic image display device according to claim 3 , wherein the controller generates second voltage change information for changing a state of the barrier voltage applied to the substrate electrodes for the positions of the light transmitting area and light blocking area to be corrected according to the movement information, and
the barrier driver changes the state of the barrier voltage applied to the substrate electrodes to correspond to the second voltage change information.

6. The stereoscopic image display device according to claim 5 , wherein,
the controller generates the second voltage change information for correcting the positions of the light transmitting area and light blocking area according to the rotated angle and rotated direction.

7. A driving method of a stereoscopic image display device which includes: a display module separating a left-eye image and a right-eye image to display a stereoscopic image; and a barrier module disposed in correspondence with the display module, and forming a light transmitting area for transmitting the left-eye image and right-eye image and a light blocking area for blocking the left-eye image and right-eye image, each of the light transmitting area and the light blocking area including a central portion, the driving method comprising:
detecting position information on a viewer which views the stereoscopic image displayed on the display module;
detecting movement information on the stereoscopic image display device;
detecting a rotated angle and a rotated direction of the stereoscopic image display device based on the movement information;
correcting positions of the light transmitting area and light blocking area by individually controlling a plurality of lower substrate electrodes formed in a multi-layer structure where the lower substrate electrodes are crossed in a zigzag shape, based on viewing position information on the viewer, the movement information and the rotated angle and the rotated direction of the stereoscopic image display device, the viewing position information corresponding to a central portion between the left-eye image and the right-eye image of the viewer;
separating the left-eye image and right-eye image to display a stereoscopic image on the display module; and
providing the stereoscopic image to the viewer through the corrected light transmitting area and light blocking area,
wherein the correcting of positions comprises generating a barrier voltage for forming the light transmitting area and light blocking area according to the viewing position information, the movement information and the rotated angle and the rotated direction of the stereoscopic image display device,
wherein a barrier channel of the barrier panel includes the light blocking area and the light transmitting area, the light blocking area being formed by a change in an alignment of the liquid crystal molecules according to the barrier voltage that is individually addressed to the lower substrate electrodes so that a certain number of the lower substrate electrodes are collectively formed as the light blocking area, the light transmitting area being formed by a remaining area of the barrier channel where there is no alignment change of the liquid crystal molecules, and th

Assignees

• Woo Heesung
• Kim Youngsik
• Park Sanghun
• Lg Display Co Ltd

Inventors

• Woo Heesung
• Kim Youngsik
• Park Sanghun

Classifications

• G09G3/003

  to produce spatial visual effects · CPC title

• H04N13/366

  using viewer tracking · CPC title

• H04N13/315

  the parallax barriers being time-variant · CPC title

• G09G2354/00

  Aspects of interface with display user · CPC title

• G09G2320/0209

  Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display · CPC title