Abstract: A 3D image display device is provided. The 3D image display device can sense a posture change of a 3D display using a gyro-sensor and prevent an image for an LE and an image for an RE from being converted using a sensed posture change. The 3D image display device includes a main body a multi-view type display, a gyro-sensor, and an image-conversion controller. The multi-view type display provides a 3D image for an LE and a 3D image for an RE. The gyro-sensor is mounted in the main body to sense a posture change of the display and the image-conversion controller prevents conversion of a provided 3D image using the posture change of the display sensed by the gyro-sensor. Therefore, an image signal for an RE and an image signal for an LE are provided to viewing regions where an RE and an LE of a viewer are located, so that the viewer can view a 3D image properly.

Abstract: A stereoscopic display for switching between a 2D image and a 3D image, including a display device displaying an image; and a parallax barrier that transmits incident light in a 2D mode and forms barriers to separate images for a left eye and a right eye in a 3D mode. The parallax barrier unit includes a first polarization plate transmitting light with a first polarization direction; a 2D first polarization grating screen including a first birefringence element and a second birefringence element alternating with each other in a grating pattern; a 2D second polarization grating screen facing the first polarization grating screen and including a third birefringence element and a fourth birefringence element alternating with each other in a grating pattern; and a second polarization plate facing the second polarization grating screen and transmitting only light with a second polarization direction among lights transmitted through the second polarization grating screen.

Abstract: Provided is a two-dimension/three-dimension (2D/3D) switchable display. The 2D/3D switchable display includes: a display device which generates an image; a first optical element which includes convex lens cells; a second optical element which includes concave lens cells that-coincide with the convex lens cells of the first optical element; and a driving unit which moves at least one of the first and second optical elements along an optical axis, wherein a two dimensional (2D) image is formed when the first optical element and the second optical element are matched with each other and a three dimensional (3D) image is formed when the first optical element and the second optical element are separated a predetermined distance from each other along the optical axis.

Abstract: A stereoscopic projection system is capable of minimizing a distance between viewing zones without reducing a distance between image projectors. In the stereoscopic projection system, a projector array having a plurality of image projectors are arranged substantially along an arrangement direction perpendicular to a connecting line between a left eye and a right eye of a viewer, and a directional screen has a first characteristic axis aligned at an angle with respect to the arrangement direction of the projector array, and a second characteristic axis perpendicular to the first characteristic axis. Therefore, the directional screen causes a plurality of images projected from the projector array to be relatively widened along the first characteristic axis and relatively narrowed along the second characteristic axis.

Abstract: An image display device to display both a 2-D image and a 3-D image. The image display device includes a display element, an image separation unit, a polarization conversion switch, and a birefringence element. The display element emits light according to image information for a left eye and image information for a right eye. The image separation unit separates the emitted light into an image for the left eye and an image for the right eye. The polarization conversion switch sequentially switches the polarization direction of the incident light. The birefringence element transmits or refracts the light, depending on the polarization direction of the light that has passed through the polarization conversion switch. An image, whose polarization direction has been switched by the polarization conversion switch, is shifted when passing through the birefringence element, whereby the left eye image and the right eye image resolution is improved.

Abstract: Provided is a three-dimensional (3D) image display apparatus, which can sense a displacement of a display using a gyroscopic sensor and control a 3D image displayed on the display using the sensed result. The 3D image display apparatus includes a body, a display displaying a 3D image, a gyroscopic sensor mounted on the body and sensing the displacement of the display, and a controller selecting one of at least two-viewpoint three-dimensional image data according to the displacement of the display sensed by the gyroscopic sensor and providing the selected data to the display. Multi-viewpoint three-dimensional image data can be provided according to the displacement of the display relative to a viewer's position.