发明名称 |
Wiper control apparatus |
摘要 |
A wiper control apparatus of the water drop sensitive type for detecting of the amount of water or water drops adhering to or present upon the front surface of a windshield and for driving a wiper, comprising: a light emitting means for introducing light into the inside of the windshield so that the light experiences total internal reflection upon interior surfaces of the windshield; a light receiving means for receiving the light reflected within the windshield; means for turning a first output D1, a second output D2, and a third output D3 to either an H level or an L level in response to the level of a signal output from the light receiving means, the outputs being preset in sequence of height of sensitivity thereof; means for outputting a drive signal WD for the wiper when outputs D1, D2, and D3 are switched into the H level; means for maintaining the drive signal as long as the second output signal D2 is in the H level even if the third output D3 turns to the L level; and means for stopping the drive signal WD for the wiper when the second output D2 turns OFF.
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申请公布号 |
US5917603(A) |
申请公布日期 |
1999.06.29 |
申请号 |
US19980120141 |
申请日期 |
1998.07.22 |
申请人 |
NIPPON SHEET GLASS CO., LTD. |
发明人 |
TANAKA, SHUHEI;KOYAMA, TADASHI;TSUNETOMO, KEIJI |
分类号 |
G01N21/17;B60S1/08;(IPC1-7):G01B11/00 |
主分类号 |
G01N21/17 |
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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