The filter includes an external light shielding sheet which is composed of a base unit, and a plurality of pattern units that are formed on the base unit, wherein a bottom, which is wider than {HEAD ~ a top}, of {TAIL ~ the pattern units} is formed as a concave shape 
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The filter includes an external light shielding sheet which is composed of a base unit , and a plurality of pattern units that are formed on the base unit , wherein a bottom , which is wider than { HEAD ~ a top } , of { TAIL ~ the pattern units } is formed as a concave shape
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