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Title: Transition waveguide for wedge display panel
Author: Chen, K. W.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 2010
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Despite their low cost, conventional rear projection displays are bulky, and so not as attractive to consumers as other thin-panel display devices. Rear projection displays can, however, be made as thin as most flat panel displays if the image is projected via a wedge-shaped waveguide panel. Image overlapping has been found to be a major issue with conventional wedge waveguide design, but it can be removed with the insertion of a curved waveguide called the transition waveguide. This thesis reports several analysis techniques and methods for designing the transition waveguide for a wedge display panel. A simple simulation model and a parabolic prototype wedge panel were first built to demonstrate the effects of the insertion of the transition waveguide. The length and the curvature of the transition region curve were found to be the two factors that most influenced the linearity of the panel. Using various techniques of curve analysis, the curvature of the transition region was proved to be the determining factor out of the two and it was also shown that a short transition waveguide is more desirable than a long one, except when the structure of the wedge waveguide is pre-determined. A concept for generating the wedge surface profile iteratively is proposed in this thesis as a way to design the ideal transition waveguide. A prototype panel with a very short transition waveguide was built using an iterative algorithm developed by the author to prove the validity of the concept.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available