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Micro Dot Patterning on the Light Guide Panel Using Powder Blasting

View Article: PubMed Central - PubMed

ABSTRACT

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.

No MeSH data available.


A square type dot pattern formed on the powder blasted mold
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f4-sensors-08-00877: A square type dot pattern formed on the powder blasted mold

Mentions: Three-dimensional shape analysis results for square-type dot mold patterns machined via powder blasting are shown in Figure 4. Figure 4(a) represents the three-dimensional shape, and Figure 4(b) represents the cross-sectional shape of the machined pattern. In the Figures, clearly formed square-type dot patterns and uniformly distributed minute burrs can be observed. However, such burrs are not expected to cause significant problems in the actual injection process for the LGP.


Micro Dot Patterning on the Light Guide Panel Using Powder Blasting
A square type dot pattern formed on the powder blasted mold
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3927497&req=5

f4-sensors-08-00877: A square type dot pattern formed on the powder blasted mold
Mentions: Three-dimensional shape analysis results for square-type dot mold patterns machined via powder blasting are shown in Figure 4. Figure 4(a) represents the three-dimensional shape, and Figure 4(b) represents the cross-sectional shape of the machined pattern. In the Figures, clearly formed square-type dot patterns and uniformly distributed minute burrs can be observed. However, such burrs are not expected to cause significant problems in the actual injection process for the LGP.

View Article: PubMed Central - PubMed

ABSTRACT

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.

No MeSH data available.