发明名称 |
Pager with automatically illuminated display |
摘要 |
A pager comprising a light sensor which is responsive to light externally illuminating the pager to generate a first signal when the sensed light is below a predetermined luminance value. The first signal is supplied to a coincidence gate which provides a coincidence output when it detects the coincidence of the first signal with a second signal that is generated when there is a message on a display. The coincidence output feeds a light source to illuminate the display to make it visible under poor lighting conditions.
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申请公布号 |
US4644350(A) |
申请公布日期 |
1987.02.17 |
申请号 |
US19840654082 |
申请日期 |
1984.09.25 |
申请人 |
NEC CORPORATION |
发明人 |
ISHII, DAISUKE |
分类号 |
H04Q7/14;G08B3/10;G08B5/22;G09G3/00;H04Q7/00;(IPC1-7):G09G3/18 |
主分类号 |
H04Q7/14 |
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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