Key Issue Research On Autostereoscopic Display Based On Front Lenticular Lens

Research on3-D displays makes great progress.The main market within thenear future will be, besides entertainment applications, the field of multimediadesktop displays. The use of autostereoscopic displays makes it possible to watch3-D images without special glasses. Previous3D display technologies need specialauxiliary equipment such as glasses and Helmet-Mounted Displays, the displayeffect of which is better, however, it brings inconvenience and discomfort. And thisissue was improved by autostereoscopic display technology, especially multi-viewautostereoscopic display technology. So that, the stereoscopic display technologyhas been a great deal of development and promotion.Compared to other auto-stereoscopic display technologies, the technology ofstereoscopic display based on front lenticular lens is more applicable and likely torealize the industrialization, which achieves stereoscopic display with theadditional lenticular lens on the existing flat-panel displays. Above of these make itbecome the research direction and hotspot.During the thesis work, we focused on the key industry issues of the frontlenticular stereoscopic display and carried out the research as follows:1. Research on optical design of lenticular lens and structure of stereo display.The reasonable design of lenticular parameters can ensure the separation of theparallax image, which is directly related to the3D effect. Thus, the structure andfocal length of lenticular lens and the viewing zone are designed to improve thedisplay effect. In order to design the most optimized grating, the relationshipamong the viewing zone, the viewing effect and the lenticular pitch, the lenticularfocal length, the distance between pixel array and lenticular lens are studied.2. Research on assembly technology and processes of large-size lenticular sheet.Large-size displays will lead to increasing errors in the structure, and it cannot guarantee that the correctness of optical system parameters if the large-sizelenticular sheet becomes deformed, which will result to the poor3D effect. In orderto resolve the problems of lenticular deformation and large-area optical adhesivebonding technology, we have carried out research on assembly technology andprocesses, and developed47-inch3D display prototype. 3. Research on parallax image acquisition and synthesis algorithm.It is critical for the display effect of stereoscopic image to study the parallaximage acquisition and synthesis algorithm. Based on this, we have carried out thefollowing work: Based on the3DSMAX dimensional object, the acquisiton methodsof parallax images is definite through the analysis and experiment. Multiviewimage sub-pixel arrangement rules have been studied to get better display effect.4. Research on the subjective and objective evaluation and improvement.The3D effect will be affected by lenticular parameters design and processingerrors, the display parameter errors and assembly process parameters error. If thesubjective and objective evaluation is established, it is possible to bring in theevaluation criteria for modeling and analysis from the design stage, reduce thedesign cycle and optimize the3D effect, and promote the industrialization processof the3D display. Thus, the subjective and objective evaluation are combined todevelop relevant evaluation program referring to some of the existing evaluationmethods. The results of the experiment are analyzed to identify sensitiveparameters. As a result, some methods improving display effect are proposed tooptimize the stereo display effect.