Journal
POLYMERS
Volume 12, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/polym12061307
Keywords
micro-structure; diffusion plate; micro injection molding; grinding
Categories
Funding
- National Natural Science Foundation of China [51805334]
- Science and Technology Planning Project of Guangdong Province [2016A040403043, 2017A010102003]
- major project for industrial technology of Guangzhou City [201902010018]
- Fundamental Research Funds for the Shenzhen University [2018031]
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In this paper, a new style of micro-structured LED (light-emitting diode) diffusion plate was developed using a highly efficient and precise hybrid processing method combined with micro injection molding and micro-grinding technology to realize mass production and low-cost manufacturing of LED lamps with excellent lighting performance. Firstly, the micro-structured mold core with controllable shape accuracy and surface quality was machined by the precision trued V-tip grinding wheel. Then, the micro-structured LED diffusion plate was rapidly fabricated by the micro injection molding technology. Finally, the influences of micro injection molding process parameters on the illumination of the micro-structured diffusion plate were investigated. The simulated optical results show that the illumination of the micro-structured diffusion plate can achieve a maximum value when the V-groove depth and V-groove angle are designed to be 300 mu m and 60 degrees, respectively. The experimental results indicate that the developed micro-structured diffusion plate may improve the illumination by about 40.82% compared with the traditional diffusion plate. The prediction accuracy of the designed light efficiency simulation method was about 90.33%.
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