Browsing by Author "Suhas, K."

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    LEDs: A study from illuminance perspective
    (2012) Punekar, G.S.; Suhas, K.; Yadav, P.S.; Kishore, N.K.
    This paper intends to demonstrate the performance of commercially available Light Emitting Diodes (LED) and their comparison with Compact Fluorescent Lamps (CFL) with illuminance as the parameter. The paper addresses the problem of illumination from the end-user point of view in the sense that, illuminance or lux output is measured rather than considering the efficacy of the lamp. It is shown that for illumining a planar surface (a typical, representative of task lighting), performance of LED's as sources are far superior to that of a commercial CFL of similar wattage. An arrangement of 3 LED's of 1 W is compared with a 5 W CFL. Also results for illuminance of 3 LED's placed in different configurations are discussed and optimal arrangement is arrived at.
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    Uniform illumination over a square target-surface using LED arrangements
    (2012) Punekar, G.S.; Suhas, K.; Yadav, P.S.; Bhattacharya, R.; Shekar, M.
    This document intends to present a study of configurations for the uniform illumination over a square-target-surface (of task-lighting dimensions) using power LEDs. A particular application of this is the illumination of a carrom board. A lighting scheme involving a distributed arrangement of LEDs that provides a near-uniform illumination level for a given height, is proposed. The optimized parameters for the variables in the arrangement are obtained by the use of MATLAB functions for optimization. The existing lighting system for the illumination of the carrom boards at NITK Surathkal is measured and compared with the proposed arrangement. � 2012 IEEE.
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    Uniform illumination over a square target-surface using LED arrangements
    (2012) Punekar, G.S.; Suhas, K.; Yadav, P.S.; Bhattacharya, R.; Shekar, M.
    This document intends to present a study of configurations for the uniform illumination over a square-target-surface (of task-lighting dimensions) using power LEDs. A particular application of this is the illumination of a carrom board. A lighting scheme involving a distributed arrangement of LEDs that provides a near-uniform illumination level for a given height, is proposed. The optimized parameters for the variables in the arrangement are obtained by the use of MATLAB functions for optimization. The existing lighting system for the illumination of the carrom boards at NITK Surathkal is measured and compared with the proposed arrangement. © 2012 IEEE.