Micro Dot Patterning on the Light Guide Panel Using Powder Blasting

Sensors

Ho Su Jang²  Myeong Woo Cho¹ 

[1]Division of Mechanical Engineering, Inha University, Incheon 402-751, Korea

[2]Dept. of Mechanical Engineering, Univ. of Incheon, 177 Dohwa –Dong, Nam-Ku, Incheon, Korea

关键词: Powder Blasting;    Light Guide Panel;    Micro Dot Patterning;    Matte Finishing;    Injection Mold;    Brightness;   

DOI  :  10.3390/s8020877

来源: mdpi

【 摘 要 】

This study is to develop a micromachining technology for a light guide panel(LGP) mold, whereby micro dot patterns are formed on a LGP surface by a single injection process instead of existing screen printing processes. The micro powder blasting technique is applied to form micro dot patterns on the LGP mold surface. The optimal conditions for masking, laminating, exposure, and developing processes to form the micro dot patterns are first experimentally investigated. A LGP mold with masked micro patterns is then machined using the micro powder blasting method and the machinability of the micro dot patterns is verified. A prototype LGP is test- injected using the developed LGP mold and a shape analysis of the patterns and performance testing of the injected LGP are carried out. As an additional approach, matte finishing, a special surface treatment method, is applied to the mold surface to improve the light diffusion characteristics, uniformity and brightness of the LGP. The results of this study show that the applied powder blasting method can be successfully used to manufacture LGPs with micro patterns by just single injection using the developed mold and thereby replace existing screen printing methods.

【 授权许可】

Unknown   
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