发明名称 |
Light emitting diode lamp and light emitting diode display unit |
摘要 |
An LED lamp has a convex lens 3 which has an upper portion 5 and a lower portion 6. An upper curved surface 5A of the upper portion is different in shape from a lower curved surface 6A of the lower portion 6 so as to refract rays of light from an LED chip 2 more strongly than the lower curved surface 6A does. This avoids reflection of incident outside light toward a front and hence prevents misrecognition. An interface plane S1 between the upper and lower portions 5 and 6 of the convex lens 3 is located on an upper end face 2A to thereby prevent collection of outgoing light upon the interface plane S1 and generation of an irregular emission peak at the front.
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申请公布号 |
US2004037076(A1) |
申请公布日期 |
2004.02.26 |
申请号 |
US20030621265 |
申请日期 |
2003.07.17 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
KATOH MASAAKI;OMOTO MASATOSHI;MIYATA MASATAKA;TAKASUGI KEIJI;SEKO MASAHIRO |
分类号 |
F21V5/04;F21W111/02;F21Y101/02;G08G1/095;H01L25/075;H01L33/54;H01L33/62;(IPC1-7):F21V5/00 |
主分类号 |
F21V5/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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