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 significantly different from conventional parallax barrier autostereoscopic 3D displays having degraded 3D image resolution.     

交叉视差及观看时间对自由立体显示视觉舒适度的影响

针对自由立体显示器视疲劳的问题,对交叉视差及观看时间影响视觉舒适度的问题进行了分析和研究。实验选取具有交叉视差的图片和视频,观察者采用主观评价和客观评价相结合的方法,对其观看舒适度进行评价。结果表明具有交叉视差的图片和视频,其观看舒适度都随时间的增加而减弱,图片的观看时间应在23min以内,视频的观看时间应在17min以内,此时观看较为舒适。持续观看具有交叉视差的图片和视频会引起视疲劳,应控制其观看时间。     

Multi-view 3D display with high brightness based on a parallax barrier

A multi-view three-dimensional （3D） display provides a more realistic experience than a two-view 3D dis- play. Therefore, a multi-view 3D display with high brightness based on a parallax barrier is proposed. The parallax barrier in the 3D display has a gradient transmittance with enhanced frequency character- istic, which indicates that the aperture ratio of the parallax barrier can be increased, thereby improving brightness. Gradient transmittance is also helpful in reducing crosstalk. A prototype of the 3D display is developed. Experimental result shows that the 3D display has higher brightness than a conventional display. In addition, crosstalk is limited at a low level.     

Shared pixel based parallax barrier 3D display with high brightness

The parallax barrier 3D display is an autostereoscopic display with low cost. However, the conventional parallax barrier 3D display has a disadvantage of low brightness. Therefore, a parallax barrier 3D display based on shared pixels is proposed. The shared pixels have adapted pixel values which limit crosstalk in a low level, so that they can be displayed simultaneously in both two parallax images. These pixels increase aperture ratio of the parallax barrier. Therefore, they can bring high brightness. A prototype of the proposed 3D display is developed and it has higher brightness than those based on the conventional one.     

One-dimensional integral imaging based on parallax barrier

One-dimensional integral imaging (1DII) which only has horizontal disparity is a practical solution of high resolution in the vertical direction, low-cost, easy-viewable three-dimensional (3D) display. A 1DII based on a parallax barrier is proposed in this paper. The 1DII consists of a parallax barrier and a display panel. The operation principle and parameter calculation of the 1DII are described in detail. Two prototypes of the proposed 1DII and conventional 1DII based on a lenticular lens array are developed. The proposed 1DII improves the quality of the 3D image and provides larger viewing angle than that based on a lenticular lens array, and it is simpler and has lower cost than that based on a lenticular lens array.     

High optical-efficiency integral imaging display with a gradient-aperture parallax barrier

We propose a one-dimensional integral imaging (1DII) display that consists of a display panel and a gradient-aperture parallax barrier. The gradient-aperture parallax barrier is symmetrical, and its slit widths gradually increase from both sides to the middle. The leftmost and rightmost slits are used to fix the viewing angle, whereas the other slits are used to increase the optical efficiency. A prototype of the proposed 1DII display is developed. Its optical efficiency is higher than that of the conventional display, but the viewing angles are the same.     

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,...     

Effect of thickness of parallax barrier on viewing angle of one-dimensional integral imaging display

A parameter design of a parallax barrier is one of the most important keys to design a one-dimensional integral imaging (1DII) display using parallax barrier. The relationship between the thickness of the parallax barrier and the viewing angle of the 1DII display is studied, and the maximal value of the thickness is also obtained. When the thickness of the parallax barrier is greater than the maximal value, the viewing angle of the 1DII display is decreased with increasing the thickness of the parallax barrier. A prototype of the 1DII display using parallax barrier is developed, and the experimental results agree well with the theory.     

Crosstalk elimination in multi-view autostereoscopic display based on polarized lenticular lens array

An autostereoscopic display composed of a directional backlight,an image display panel,a striped half-wave plate,and a polarized lenticular lens array is proposed.The directional backlight emitting the parallel light can redirect the cones of light to lenticular lens array and reduce the chromatic spatial-interference effect.The striped half-wave plate,located in front of the image display panel,transformed the polarization direction of the lights from the directional backlight into two mutually perpendicular directions.The polarized lenticular lens array not only can divide the light from the left and right view images to send to left and right eyes but also can reduce the crosstalk of the stereoscopic images.The proposed autostereoscopic display can produce high quality stereoscopic images without crosstalk at the optimal viewing distance.     

A 3D image interleaving method for real-time autostereoscopic display based on GPU

Multiview autostereoscopic systems display three-dimensional (3D) images interleaved from parallax images to provide adequate viewing zones for viewers. A 3D image interleaving method based on parallel processing with Graphic Processing Unit (GPU) is proposed to accelerate the image interleaving for real-time autostereoscopic displays. The proposed method is implemented with Direct3D Application Programming Interface (API) library. Masks used to interleave the 3D images are generated according to some particular principles. Both multiple texture blending and alpha blending operations are used to interleave a 3D image. The experiments prove that high interleaving efficiency and good stereoscopic sense can be obtained. The proposed method meets the requirement of real-time multiview autostereoscopic displays and avoids extra shader program.     

狭缝光栅、柱面透镜光栅及其新构型在三维显示中的应用

介绍了三维显示技术的研究现状,综述了狭缝光栅和柱面透镜光栅在自由立体显示技术中的重要应用。回顾了各种光栅式自由立体显示系统的结构和原理;提出了如何根据狭缝光栅和柱面透镜光栅的特殊光学性质,在传统的立体显示系统中添加各种光栅形成灵活组合结构来提高立体显示效果,强调了它们在减小串扰、增大视场角、避免摩尔条纹以及提供更全面的三维信息等方面的作用。最后指出基于两种光栅的叠加构成面积大、参数均匀、价格低廉的新型透镜可实现全视差立体显示,对探索自由立体显示技术的研究很有意义。     

狭缝光栅、柱面透镜光栅及其新构型在三维显示中的应用

介绍了三维显示技术的研究现状,综述了狭缝光栅和柱面透镜光栅在自由立体显示技术中的重要应用。回顾了各种光栅式自由立体显示系统的结构和原理;提出了如何根据狭缝光栅和柱面透镜光栅的特殊光学性质,在传统的立体显示系统中添加各种光栅形成灵活组合结构来提高立体显示效果,强调了它们在减小串扰、增大视场角、避免摩尔条纹以及提供更全面的三维信息等方面的作用。最后指出基于两种光栅的叠加构成面积大、参数均匀、价格低廉的新型透镜可实现全视差立体显示,对探索自由立体显示技术的研究很有意义。     

3D display with uniform resolution and low crosstalk based on two parallax interleaved barriers

The resolution of the parallax image is inversely proportional to the view number in the horizontal direction for the traditional autostereoscopic display based on a parallax barrier. To balance the resolution in the vertical and horizontal directions, two parallax interleaved barriers are designed. The liquid crystal display panel provides the synthetic image with square pixel units, and the pixels in a unit are distributed to different horizontal views. Two parallax interleaved barriers work together to modulate pixels in vertical and horizontal directions. 3D display with uniform resolution and low crosstalk is demonstrated.     

Large stereoscopic LED display by use of parallax barrier of aperture grille type (Invited Paper)

We propose a large parallax barrier by use of aperture grille. Main advantages of using aperture grille include no reflection and no absorption in apertures, as well as wide viewing angle. These advantages are investigated with theoretical calculations and experiments by use of several kinds of LED panels, such as a fine-pitch LED panel and a 140-inch large LED panel. Limitations of viewing angle by parallax barrier are analyzed in conventional black stripes on a transparent substrate type and in aperture grille type. Experimental results straw use of aperture grille increases contrast and reduce reflection on the aperture surface.     

平显视差测量系统的设计与实现

 针对平视显示器调试过程中视差检测主观性大,不能给出精确量的问题。基于机器视觉,研制了一套平视显示器视差检测装置。装置采用传统光学系统,利用CCD光电耦合器件手动调节,将大视场平行光管十字分划成像,对图像做处理,计算给出视差值。用装置和摆头法测试结果进行比较,结果表明该测试系统提高了平视显示器视差检测的精确度,整个系统的测量精度为28″。     

High dense views auto-stereoscopic three-dimensional display based on frontal projection with LLA and diffused screen

We present a high dense views auto-stereoscopic three-dimensional display method with the projectors array and lenticular lens array(LLA) screen. The principle and configuration are demonstrated. This display method utilizes lenticular screen to modulate the information of projectors. To increase the dense of views, we propose a novel arrangement way of projectors array. In the experiment, the viewer can obtain smooth motion parallax and evident stereo feeling at optimal distance. Through analyzing and observation, the maximum display depth is found to be more than 50 cm.     

Design and fabrication of semi-transparent screen based on micro-patterns for direct-view type head-up display in automobiles

A semi-transparent screen with hemisphere micro-patterns was proposed and designed to enhance the brightness uniformity of the display image toward the driver for a direct-view type head-up display. The hemisphere micro-patterns were designed to consider the inclined angle of the windshield for efficient reflection and scattering toward to the driver. The density and radius of the hemisphere micro-patterns were adjusted as a function of position on the screen based on the geometrical calculation and analyzed by the commercial optical simulation tool based on a ray-tracing method. The designed hemisphere micro-patterns was fabricated by the thermal reflow method and evaluated to confirm the uniform illumination. From the results, the semi-transparent screen with variable micro-patterns shows the 91.9 % of brightness uniformity with the enhanced luminance compare to a screen without micro-patterns. A luminance of fabricated screen also shows good agreement with the simulation result to reflect the clear and bright driving information to the driver.     

大屏幕激光投影与激光电视

作为下一代的全色显示技术,激光投影显示技术与传统的显示技术相比,有很多明显优势,这是由激光本身的固有特点所决定的,比如高饱和度、低功耗以及潜在的寿命长等.文章介绍了激光显示技术的历史背景以及国内外的研究现状,介绍并分析了激光光源、基于数字光学引擎（DLP）及反射式硅基液晶光学引擎（LCOS）的激光显示系统和颜色管理技术.文章还对激光投影显示的优势进行了归纳,并对激光显示的产业化前景和整体市场进行了分析和预测.     

头盔显示器视差自动测量中眼位点的自动对准

自动测量头盔显示器的视差时，用CCD相机取代人眼的主观读取，由于机器视觉不如人眼灵活，CCD相机在人眼观察点才能确保移动时采集的图像是完整的，从而保证全视场的视差测量。该文提出采用模式搜索法在头盔显示器光学平面内实现CCD相机自动对准人眼观察点(眼位点)，从而实现头盔显示器全视场视差的自动测量。对该自动测量系统的测量原理，以及CCD相机自动对准眼位点的实现过程进行了详细论述与说明，对测量精度与效率，对准精度与重复定位精度进行了实验分析。实验结果表明，该方法能够快速、准确、自动地对准眼位点，定位精度为±0.071°，与摆头法测量视差系统进行对比实验，全视场视差测量效率高，重复精度高。     

大屏幕激光投影与激光电视

作为下一代的全色显示技术,激光投影显示技术与传统的显示技术相比,有很多明显优势,这是由激光本身的固有特点所决定的,比如高饱和度、低功耗以及潜在的寿命长等.文章介绍了激光显示技术的历史背景以及国内外的研究现状,介绍并分析了激光光源、基于数字光学引擎(DLP)及反射式硅基液晶光学引擎(LCOS)的激光显示系统和颜色管理技术.文章还对激光投影显示的优势进行了归纳,并对激光显示的产业化前景和整体市场进行了分析和预测.