Yuhong Tao

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.

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.

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.

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.

Crosstalk reduction in multi-view autostereoscopic three-dimensional display based on lenticular sheet

A method to reduce crosstalk in multi-view autostereoscopic three-dimensional (3D) displays based on the lenticular sheet is proposed. Correcting the luminance values of each parallax image displayed on the display screen is employed. We analyze the causes of crosstalk. We deduce the formulas of crosstalk reduction according to the relationship between crosstalk coefficients of each parallax image observed through the lenticular sheet, luminance values of each parallax image displayed on the display screen, and luminance values of each parallax image observed through the lenticular sheet at each viewing position. Experimental results verify the effectiveness of the proposed method.

Elimination of vertical parallax in multi-view parallax images

In three-dimensional displays, large vertical parallax in parallax images is disadvantageous to stereo vision due to the presence of visual fatigue. Based on the principle that homologous points in different parallax images correspond to the same object point, a method is proposed to eliminate the vertical parallax in multi-view parallax images. The coordinate mapping relationship between a standard parallax image and an awaiting rectification parallax image is established according to the coordinates of the image points of the rectangular calibration board vertices. Experiments are conducted, and results prove that the proposed method is reliable.

41.4: An Autostereoscopic 3D Projector Based on Two Parallax Barriers

This paper proposed an autostereoscopic 3D projector composed of LCD projectors and two parallax barriers located beside the two sides of the projection screen. Parallax barrier 1 facing to the projectors acts as the function of collimating the images which have aberrations on the edge of the projection screen. Parallax barrier 2 facing to viewers acts as the functions of the parallax barrier in ordinary autostereoscopic 3D displays. The operation principle of the system and the calculation equations for the parallax barriers, the capture and correction of images were described in details. A 60-inch autostereoscopic 3D projector prototype having four projectors was developed. The prototype has high resolution and sharp stereoscopic image presentation.

Fabry-Perot microcavity luminescent screens for optically written display

Fabry-Perot microcavity luminescent screens for optically written display are presented. The screens consist of dielectric mirrors sandwiching a luminescent layer. An incident 975-nm laser source excites the luminescent medium by upconversion for emission in red, green, or blue. The Fabry-Perot microcavity serves to narrow the emission band, leading to more saturated color. The design and fabrication are described. The display creates good images with an unprecedented color gamut.

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.