Abstract
With the rapid development of LED technology, the lighting effect of LED lamp belt in the atmosphere lamp has been unable to meet the needs of the modern market, and the COB lamp belt has gradually entered the public field of vision due to its advantages of high light uniformity, low junction temperature and large luminous Angle. In this paper, the stability, light uniformity, junction temperature and other performance of the two kinds of lamp belt under different color temperature and different power were analyzed by setting contrast experiment. It was found that LED lamp belt had uniform light and poor heat dissipation effect due to chip distribution characteristics, and it would accumulate a lot of heat and appear color shift phenomenon when continuously lit. The COB lamp belt can not only maximize the heat dissipation performance of the substrate, but also achieve more uniform light distribution by the way of multi-chip arrangement. The relationship between the thermal performance and chip spacing is analyzed by optimizing the design, which plays a guiding role in the actual production of the lamp belt
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