| Summary: | 碩士 === 國立臺北科技大學 === 建築與都市設計研究所 === 102 === Spotlights are commonly used in exhibition areas or shopping centers for accent lighting, but nevertheless, they can also generate a glare that makes our eyes uncomfortable. To resolve the problem, anti-glare products are used together with spotlights, and those anti-glare products commonly use materials with either a high absorption rate or a dense grid to shield the light source and thus suppress glare. Unfortunately, both approaches significantly reduce the efficiency of the fixture and waste energy.
In the thesis, the investigator chose AR111 spotlight fixtures, the most commonly used type of spotlight fixtures in shopping centers, as design subjects. By referring to those anti-glare products currently available on the market and applying the TRIZ method, the investigator proposes novel improvement strategies for the anti-glare grid component. The investigator also used the optical software TracePro and the illumination software DIALux conduct optical simulation and illumination quality analysis. Actual grid components were developed according to the results and compared with two anti-glare products from the market for photometric detection. The simulation and the empirical test results suggest that all three types of LED spotlight anti-glare grids designed in this study had a unified glare rating (UGR) less than 10, i.e., glare was non-detectable; their fixture efficiencies were 77%, 79% and 81% respectively, which are all greater than 60%, the standard for general grid lighting fixtures. Compared with anti-glare Product 1 from the market, the three designs reached a level of enhancement of 20%, 22%, and 24% respectively, and compared with anti-glare Product 2 from the market, their levels of enhancement were 57%, 59%, and 61% respectively. These values suggest that the new designs presented in this study have better energy efficiency. Finally, the grid components presented here are equipped with a light beam angle adjustment design allowing the user to adjust the angle of the beam flexibly based on the need. Moreover, the surface of the spotlight is even, bright and without image retention, and therefore, the lighting quality can be much improved.
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