近年來隨著3D列印技術發展越來越成熟，許多3D列印機大量進入消費市場，使得工業界能以更便利的方式製造元件。本實驗室開發一套下照式手機3D列印機，以價格便宜及攜帶方便為主軸打入一般市場，利用手機LCD光源搭配可見光樹酯，即可印製所需物件，但其成型解析度較市面上光固化式的3D列印機差。
　　本論文針對下照式手機3D列印系統之解析度不佳的問題進行探討與改善，先以市面上商用機台與本系統進行比較，從測試結果中得知兩者間之差異性。發現使用手機LCD面板作為光固化技術之光源，有光強度較弱及光線發散角過大的問題，導致列印過程中影響成型尺寸的精度，因此本研究透過防窺片來減少光發散角度，及使用蘇丹黑染料來控制每層固化深度，使其列印解析度能有所提升。
　　研究結果發現，防窺片能有效改善本系統列印解析度不佳的問題，且有良好成型精度，整體列印誤差值可降低至5~8%。而添加蘇丹黑染料於材料系統，因染色使光源強度變弱，當印製條寬尺寸越小時，成型效果較不佳；印製條寬尺寸越大時，誤差值則越低。

Recently, as the development of 3D printing technology became more and more mature, 3D printing machines have entered large numbers of consumer markets. The laboratory has developed 3D printing machine with the smart phone, which has entered the general market with the advantage of cheap price and portability. The LCD light of mobile phone can be used to print the object with the visible light resin, but the molding resolution is different from that printed for the other 3D printer.
This paper discusses and improves the problem of poor resolution on the bottom up smart phone printing. The commercial machine is compared with the system, and the results to show the difference,it was found that the use of LCD panel as the light source that has the problems of weak light intensity and excessive light ray divergence, which leads to the accuracy of the molding size during the printing process. Therefore, this study reduces the light divergence angle through the anti-peeping tempered film, and uses Sudan black dye to control the curing depth of each layer, so that the printing resolution can be improved.
The research results show that the anti-peeping tempered film can effectively improve the poor resolution, and has good forming precision. The overall printing error can be reduced to 5~8%.Adding Sudan black dye to the material system, the intensity of the light source is weakened by dyeing. When the width of the printed strip is smaller, the forming effect is not good; the width of the printed strip is larger, the error value is lower.

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