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Directional backlight array widely adopted in various display systems is in general accompanied with visual inhomogeneity, moiré pattern, Mach band and defect. Removal of the defects is shown to be realizable by a systematical optical design scenario, which was tested with experimental verification.
The relative retinal illumination (RRI) distribution of a display system consisting of arrayed backlight units, focusing lenses and viewing screen is simulated with Monte Carlo ray tracing method. A random scattering model is applied to describe the optical seam effect in the vicinity of the stitching. RRI distribution on the screen viewed at different locations for an directional backlight display...
Designing reliable user authentication on mobile phones is becoming an increasingly important task to protect users' private information and data. Since biometric approaches can provide many advantages over the traditional authentication methods, they have become a significant topic for both academia and industry. The major goal of biometric user authentication is to authenticate legitimate users...
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