Wu-Xiang Zhao

Autostereoscopic display based on two-layer lenticular lenses

An autostereoscopic display based on two-layer lenticular lenses is proposed. The two-layer lenticular lenses include one-layer conventional lenticular lenses and additional one-layer concentrating-light lenticular lenses. Two prototypes of the proposed and conventional autostereoscopic displays are developed. At the optimum three-dimensional view distance, the luminance distribution of the prototypes along the horizontal direction is measured. By calculating the luminance distribution, the crosstalk of the prototypes is obtained. Compared with the conventional autostereoscopic display, the proposed autostereoscopic display has less crosstalk, a wider view angle, and higher efficiency of light utilization.

Autostereoscopic three-dimensional projector based on two parallax barriers

An autostereoscopic 3D projector using several 2D projectors, a projection screen, and two parallax barriers is proposed. Parallax barrier 1 facing the 2D projectors collimates the images that have aberrations on the edge of the projection screen. Parallax barrier 2 facing viewers acts as the parallax barrier in ordinary autostereoscopic 3D displays. The operation principle of the system, the calculation equations for the parallax barriers, and the capture and correction of parallax images are described in detail. A 60-inch autostereoscopic 3D projector prototype having four 2D projectors was developed. The presentation of 3D static, animation, and video images is realized by the prototype. The prototypes stereoscopic images without aberrations and with a little cross talk are sharp. Especially, its 3D resolution is the same as its 2D resolution.

An Autostereoscopic 3D Projection Display Based on a Lenticular Sheet and a Parallax Barrier

Three-dimensional (3D) projection display is an effective approach to realize large size 3D images with high resolution. An autostereoscopic 3D projection display is proposed. It consists of four projectors, a projection screen, a lenticular sheet and a parallax barrier. Operation principle and calculation equations are described in details and the parallax images are corrected by the means of homography. A 50-inch autostereoscopic 3D projection display prototype is developed and it presents good stereoscopic images. The normalized luminance distributions of the viewing zones are measured, and the results agree well with the designed values. Compared with the conventional autostereoscopic 3D projection display based on two parallax barriers, the proposed prototype has much higher brightness.

Pixel Arrangement of Autostereoscopic Liquid Crystal Displays Based on Parallax Barriers

The methods of pixel arrangement for autostereoscopic liquid crystal displays based on conventional vertical parallax barriers are summarized. A novel method of pixel arrangement for autostereoscopic liquid crystal displays based on step parallax barriers is proposed. The pixel arrangements are given for different inclined angles of parallax barriers and different column numbers of images. A demo of the autostereoscopic liquid crystal display using the new method of pixel arrangement presents very good stereo images. The results help to solve the process, storage and transmission of stereo images of autostereoscopic liquid crystal displays based on parallax barriers.

2D/3D Switchable Autostereoscopic Display Based on Polymer-Stabilized Blue-Phase Liquid Crystal Lens

A 2D/3D switchable autostereoscopic display based on a polymer-stabilized blue-phase liquid crystal (PSBPLC) lens is proposed. The operating principle of the PSBPLC lens is analyzed. We have designed a 2-view 2D/3D switchable autostereoscopic display equipped with a PSBPLC lens on a liquid crystal display panel. The 2D/3D switching lens is polarization-independent and performs fast switching because of the employment of the PSBPLC. Experiment results show that the proposed 2D/3D switchable autostereoscopic display achieves good 2D and 3D performance.

Autostereoscopic three-dimensional display based on two parallax barriers

An autostereoscopic three dimensional display composed of a flat panel display and two parallax barriers is given. Parallax barrier 1 facing the backlight acts as the function of the parallax barriers in ordinary autostereoscopic three dimensional displays, and parallax barrier 2 facing viewers acts as the function of decreasing the crosstalk of stereoscopic images. The operation principle of the display and the calculation equations for the parallax barriers are described in detail. A prototype of the display is developed and it presents good stereoscopic images with little crosstalk.

A full resolution autostereoscopic 3D display based on polarizer parallax barrier

A full resolution autostereoscopic three-dimensional (3D) display prototype is developed. It is composed of a time division thin film transistor liquid crystal display panel with an optical controlled birefringence liquid crystal polarization switch and a polarizer parallax barrier. Fast driving circuits operating at 120-Hz frame rate are fabricated. The 3D images on the display have the same resolution as the corresponding two-dimensional images, which is signi¯cantly different from conventional parallax barrier autostereoscopic 3D displays having degraded 3D image resolution.

Three-dimensional display based on dual parallax barriers with uniform resolution

The 3D display based on a parallax barrier is a low-cost autostereoscopic display. However, the vertical and horizontal resolution of the 3D images displayed on it will be seriously nonuniform as this display has a large number of views. It will worsen the display quality; therefore, a 3D display that consists of a 2D display panel and dual parallax barriers is proposed. With a 2D display panel, the proposed 3D display provides the synthetic images with square pixel units in which the arrangement of pixels can make the 3D image have uniform resolution. With the dual parallax barriers, the proposed 3D display shows the pixels in square pixel units for different horizontal views. Therefore, this display has uniform resolution of 3D images. A four-view prototype of the proposed 3D display is developed, and it provides uniform 3D resolution in the vertical and horizontal directions.

Multilayer Dielectric Color Filters for Optically Written Display Using Up-Conversion of Near Infrared Light

An optically written display based on up-conversion of near-infrared light is a newly emerging display technology. For filtering out unwanted colors from this light generator, multilayer dielectric color filters are designed for red, green, and blue screens, respectively. Layer-symmetric films are used in the designed filters and the conjugate gradient method is used to optimize the design. It is observed that the characteristics of the filters are good in the whole visible wavelength range when the incident angle is less than 40deg. The encompassed color triangle of the display with the color filters is larger than that without the color filters, and images with more saturated colors are obtained.

A Frontal Multi-Projection Autostereoscopic 3D Display Based on a 3D-Image-Guided Screen

A frontal multi-projection (FMP) autostereoscopic display using a 3D-image-guided screen is proposed for improving space efficiency. Based on the optical multiplexing and de-multiplexing, the important optical functions of 3D-image-guided screen are parallax image interlacing and view-separating, which is capable of reconstructing 3D images without quality degradation from the front direction. The operating principle, optical design calculation equations and correction method of parallax images are described in detail. A 50-inch FMP autostereoscopic prototype based on the 3D-guided-image screen with pixels (1024×768×8) is developed, which enhances the brightness and 3D perceptions. The performance of this prototype is evaluated by measuring the luminance and crosstalk distribution along the horizontal direction at the optimum viewing distance. This research has potential applications in some commercial entertainments and movies for the realistic 3D perceptions.