Manufacturing method of filling a resin into a housing, an LED digital display and the method of making the same
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United States of America Patent
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Sep 19, 2017
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Jan 5, 2017
app pub date -
Mar 3, 2016
filing date -
Jun 30, 2015
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Abstract
A manufacturing method of filling a resin into a housing includes the steps of: providing a housing that has at least one recess, with the recess having first and second spaces, and the first space being disposed above the second space; inverting the housing; injecting a fluid into the recess to fill the first space, with the fluid having a viscosity coefficient and a surface tension less than those of water; and injecting a first resin into the recess, with the first resin having a specific gravity greater than that of the fluid, such that the first resin fills the first space and the fluid fills the second space.
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