发明名称 |
Portable terminal device with generally regular illumination |
摘要 |
A printed board placed on a lower case of a portable terminal device comprises a circuit pattern for realizing electric connection based on the key button operation via a key pad, an LED for irradiating characters or numbers on the key buttons with a light, a black printing printed/coated with a low reflector for eliminating the light irregularity, and white printings printed/coated with a high reflector for eliminating the light irregularity.
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申请公布号 |
US6567650(B1) |
申请公布日期 |
2003.05.20 |
申请号 |
US20000499187 |
申请日期 |
2000.02.07 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KITAMURA TOSHIYASU;TAMARU MAKOTO;YOSHIDA MAMORU |
分类号 |
H01H13/02;H01H13/702;(IPC1-7):H04B1/38 |
主分类号 |
H01H13/02 |
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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