Optical Element Design for Immersive Displays
Date Issued
2012
Date
2012
Author(s)
Wu, Er-Hsuan
Abstract
Large-view immersion brings visual reality, and gives great entertainment to audiences, so that the production of immersive displays becomes a tendency of display industry. However, the development of glass substrates of FPDs (flat panel displays) is confronted with bottlenecks, such as manufacture difficulty and transportation cost, as its size goes large. We can easily think of tiling small displays to provide large view, but the gaps around FPDs obstruct our tiling. This inspired us to eliminate the gaps to achieve the effect of immersion.
Based on virtual imaging, we designed certain optical elements, which function to cover the gaps of FPDs with the magnification of their active area. Since we could not restrict observers in a certain viewing angle, we should consider not only the case of front view but also the cases of lateral views in our design. Therefore, we introduced a method called “the partition design” to form our elements, which are shaped by combination of lenses with different curvatures. As the partition design is of approximation, we carried out smoothing to wipe out the cusps on our elements.
With strict definitions and detailed analyses, we built 4 types of 2D models, verifying their effects of immersion by optical simulation software LighttoolsR. We also calculated their image distortion, proving that more delicate partition design results in better image quality. For model degeneration, We tried image distortion correction by adjusting the input image. By comparing simulation results to theoretical calculations, we found out low luminance loss and low dispersion in our elements. Moreover, we built 3 types of 3D models with optimized trade-off between the image continuity and the corner gap, and had an observation on their effects of immersion by LighttoolsR.
Subjects
display
gap
immersive
geometric optics
Type
thesis
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