| dc.description.abstract | This thesis focuses on the design, comparison, and analysis of solidstate light sources and reflector-based automotive lamps. We propose the concept of a linear shift-invariant system and combine correlation and convolution operations for optical simulations of light distribution. We also explore the linear shift-invariant range of second-order optical systems to obtain imaging results equivalent to a planar light source by convolving with the impulse response within that range. In this study, we define the linear shift-invariant range of the reflective mechanism on the light source surface and make an ideal assumption based on this characteristic. We assume the linear shift-invariant range on the entire light source surface using the linear shift-invariant intervals in two axes, attempting to identify the range of linear shift-invariant regions within the second-order optical system. This confirms the existence of a certain range of linear shiftinvariant systems even in complex lighting systems. After demonstrating the feasibility of linear shift systems in lighting systems, we propose a simple method for partitioning the linear shift-invariant range using an equidistant grid on the light source surface. The light source is divided into 100 equidistant grids, and each grid is replaced with a point light source placed at the center. Simulations are performed on two types of reflectors, comparing the results with those obtained from simulations of a square Lambertian light source with an equivalent area. The normalized crosscorrelation (NCC) value exceeds 99.06%. By utilizing image processing techniques, we can reduce the number of grids and the number of rays required for simulation, significantly improving computational speed. By the calculation method, it will reduce 99% of the calculation time compare to Lambertian light source calculation while the NCC still higher then 99%.
This thesis proposes an efficient signage design based on solid-state illumination light sources. By incorporating a high-efficiency longdistance projection lamp design, along with a combination of retroreflection structures and diffusers, passersby can clearly identify the signage. The signage itself becomes structurally simple and less prone to damage, while the modular projection lamps no longer require road closures for maintenance, offering the advantages of easy replacement and maintenance. | en_US |