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Study on the Methods to Improve the Uniformity of Luminance and Chrominance in the Automobile Backlight System

Author: YuanDong
Tutor: FuYuMei
School: Chongqing University
Course: Instrument Science and Technology
Keywords: Automotive background light LED Optimal spacing Consistency Illumination matrix
CLC: TM923.45
Type: Master's thesis
Year: 2009
Downloads: 108
Quote: 1
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Abstract


Currently, the car toward the refinement of the functional components, humane and personalized direction. As the most important automotive interior parts, automotive background light to some extent affected the quality of people's desire to buy. However, because of its traffic safety does not play a decisive role, has long been used as background light car accessory not to be paying attention to its color and brightness uniformity is poor. Therefore, the impact of auto background light color and brightness uniformity factor analysis to identify the main factors and suggest improvements for each factor, not only can guide the car back light design, improved color brightness consistency, but also for enhance the quality of automotive products and automotive brand's overall image has important practical significance. Firstly, the background light of the car's development and status were analyzed and studied, and gives a more objective definition, then on relevant topics with the photometry, colorimetry and lighting theory of knowledge were introduced, according to the above theory Knowledge discusses the automotive background lighting quality evaluation methods. Using this evaluation method was tested on a sample vehicle, the experimental results were analyzed. Based on this background light from the analysis of the product already starting to find a background light chromaticity of vehicles luminance uniformity of the main factors, namely, the background light source, light-transmitting material, light-transmissive material between the light source and the background distance. Thereby influencing factors on the detailed study of the system, including as a background illumination of the LED light source of electrical and optical properties, guaranteed auto backlight brightness uniformity of color design principles, which the same optical components that are used in the background LED light source of the same color and the electrical and optical parameters of the same drive current; translucent material consistent with the distance between the light source; light transmission properties of the material thickness and consistency; LED rational arrangement of the light source. Rational arrangement of the LED light source significantly affect the consistency of the background brightness. This calculation based on the method of illumination of the target surface of a single LED illuminance distribution matrix, and as a basis to obtain various combinations of the LED array pitch contrast matrix generated, by comparing the contrast consistent with the data matrix sex can get optimal spacing. According to the method of preparation of the corresponding computer program examines five different viewing angle LED array of combinations to get the best of each linear array and planar array layout program, and simulation renderings. Using the above research design rectification experiments on two real car chrominance and luminance backlight system consistency of the rectification. Light background color for rectification before the test results were compared with analysis of the brightness, analysis of test results and actual observations showed that after rectification car light background color brightness uniformity has been greatly improved, verify the correct working of this research sex.

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CLC: > Industrial Technology > Electrotechnical > Electrification,electrical energy application > Electrical lighting > Illuminator > Mobile lighting
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