A novel high brightness parallax barrier stereoscopy technology using a reflective crown grating

Abstract

In this study, we propose a method to improve the shortcoming of parallax barrier method. As a result of a great deal of light being absorbed or diffused by barrier, brightness will be seriously decreased. Thus, we recommend an idea to effectively reuse the absorbed light, so that the periodic reflective crown grating is plated and fitted below the barrier. The light absorbed or diffused by barrier will be able to be guided back to the reflected layer in backlight and the re‐guided light can be reused again. After simulation, we find the average brightness of the periodic reflective crown grating is raised 114.47% more than traditional parallax barrier type. And we further measure the brightness of three‐dimensional display composed of the periodic reflective crown grating we designed and a 14 inch LCD panel. It is discovered that the brightness is raised by 96.33%. Besides, we put the metal reflective crown grating in between the liquid panel and the backlight, and this method can effectively avoid the loss of the recycled light reflected, which is absorbed by liquid layer. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1610–1616, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23435

5.4: The Autostereoscopic System with Diffractive Optical Elements

“…That means accordingly the brightness of the 3D effect is about 43% with HOE beam splitter and 70% with DOE beam splitter of the original brightness on panel. Although the diffraction efficiency of HOE beam splitter is lower than DOE beam splitter, the brightness performance is both much better than the brightness of traditional stereoscopic panels with parallax barriers [5].…”

“…With the accurate alignment of lenticular films, the roughness of the lens surface would result in dispersion or crosstalk [4]. On the other hand, the non-transparent area of grating spectroscopic films reduces four-fifth of the brightness of the entire panel [5], and the column arrangement is likely to appear moiré on the original LCD panel [6,7]. To improve the above defects, in diffractive optics, holographic optical element (HOE) and diffraction optical element (DOE) are new class of autostereoscopic technique, because they can offer unique optical properties that are not possible with traditional optical elements.…”

Enabling concurrent dual views on common LCD screens

“…Again columns from two images are spatially interlaced on the screen. Unlike parallax barrier which blocks half of the light, lenticular lens refracts the light in different directions for different viewing angles, thus offers higher brightness [1]. Besides the above more well-known technologies, there are also other more specialized solutions.…”

The effect of stereoscopic viewing in a word‐search task with a layered background

“…The effect of reduced brightness had a bigger impact on a 2-D display than it did on a 3-D display (Experiment 1). Some recent research has proposed new techniques for improving the brightness of parallax-barrier displays (Chien et al, 13 ). Thus, it is possible that the brightness disadvantage may diminish in future displays with improvements in display resolution and luminance, leading to use of disparity in multilayered displays without loss in legibility due to reduction in display brightness.…”