发明名称 |
Portable information terminal apparatus having illumination control function |
摘要 |
A portable information terminal apparatus measures the ambient illuminance and exercises illumination control over its display and manual input unit during a predetermined period. The appropriate length of this predetermined period is determined from various parameters including the ambient illuminance and the function(s) to be used by the portable information terminal apparatus. Illuminance measurements are subjected to various corrective computations to obtain proper illuminance decision values. These decision values are used to perform appropriate illumination control. |
申请公布号 |
US2002071059(A1) |
申请公布日期 |
2002.06.13 |
申请号 |
US20010969803 |
申请日期 |
2001.10.02 |
申请人 |
FURUYA KENSEI;YAMANUSHI SEIJI;YOSHIDA MASAO |
发明人 |
FURUYA KENSEI;YAMANUSHI SEIJI;YOSHIDA MASAO |
分类号 |
H04M1/02;H04B7/26;H04M1/22;H04M1/73;(IPC1-7):H04N5/57 |
主分类号 |
H04M1/02 |
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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