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Descripción
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| The scope of the present paper is the derivation of a merit function which predicts the visual perception of LED spot lights. The color uniformity level Usl is described by a linear regression function of the spatial color distribution in the far field. Hereby, the function is derived from four basic functions. They describe the color uniformity of spot lights through different features. The result is a reliable prediction for the perceived color uniformity in spot lights. A human factor experiment was performed to evaluate the visual preferences for colors and patterns. A perceived rank order was derived from the subjects? answers and compared with the four basic functions. The correlation between the perceived rank order and the basic functions was calculated resulting in the definition of the merit function Usl. The application of this function is shown by a comparison of visual evaluations and measurements of LED retrofit spot lamps. The results enable a prediction of color uniformity levels of simulations and measurements concerning the visual perception. The function provides a possibility to evaluate the far field of spot lights without individual subjective judgment. | |
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Internacional
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Si |
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Nombre congreso
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Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII |
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Tipo de participación
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960 |
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Lugar del congreso
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Revisores
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Si |
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ISBN o ISSN
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9780819499165 |
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DOI
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Fecha inicio congreso
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01/02/2014 |
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Fecha fin congreso
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06/02/2014 |
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Desde la página
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1 |
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Hasta la página
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8 |
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Título de las actas
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Photonics West 2014 |