Micromachined edge illuminated optically transparent automotive light guide panels

  1. Get@NRC: Micromachined edge illuminated optically transparent automotive light guide panels (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1117/12.908202
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Proceedings titleProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ConferenceMicromachining and Microfabrication Process Technology XVII, 24 January 2012 through 26 January 2012, San Francisco, CA
Article number824806
SubjectActive regions; Automotive applications; Automotive light panels; Automotive lighting; Edge lighting; Fringe-effects; Light guide panels; Lighting panels; Luminance uniformity; Micro milling; Micro-optical elements; Micromachined; New design; Optical light; Optical simulation; Spatial distribution patterns; Test samples; Transparent plastics; Variable parameters; Composite micromechanics; Diffractive optics; Lighting; Liquid crystal displays; Microanalysis; Microfabrication; Microoptics; Milling (machining); Optical fibers; Micromachining
AbstractEdge-lit backlighting has been used extensively for a variety of small and medium-sized liquid crystal displays (LCDs). The shape, density and spatial distribution pattern of the micro-optical elements imprinted on the surface of the flat light-guide panel (LGP) are often "optimized" to improve the overall brightness and luminance uniformity. A similar concept can be used to develop interior convenience lighting panels and exterior tail lamps for automotive applications. However, costly diffusive sheeting and brightness enhancement films are not be considered for these applications because absolute luminance uniformity and the minimization of Moiré fringe effects are not significant factors in assessing quality of automotive lighting. A new design concept that involves micromilling cylindrical micro-optical elements on optically transparent plastic substrates is described in this paper. The variable parameter that controls illumination over the active regions of the panel is the depth of the individual cylindrical micro-optical elements. LightToolsTM is the optical simulation tool used to explore how changing the micro-optical element depth can alter the local and global luminance. Numerical simulation and microfabrication experiments are performed on several (100mmx100mmx6mm) polymethylmethacrylate (PMMA) test samples in order to verify the illumination behavior. © 2012 SPIE.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); Automotive (AUTO-AUTO)
Peer reviewedYes
NPARC number21269206
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Record identifier570a6190-a754-43f9-aea5-bac643e75ec1
Record created2013-12-12
Record modified2016-05-09
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