发明申请
US20100259283A1 CAPACITIVE PROXIMITY SENSOR AND PROXIMITY SENSING METHOD 有权
电容式接近传感器和临近感测方法

  • 专利标题: CAPACITIVE PROXIMITY SENSOR AND PROXIMITY SENSING METHOD
  • 专利标题(中): 电容式接近传感器和临近感测方法
  • 申请号: US12677907
    申请日: 2008-10-06
  • 公开(公告)号: US20100259283A1
    公开(公告)日: 2010-10-14
  • 发明人: Takeshi Togura
  • 申请人: Takeshi Togura
  • 申请人地址: JP Tokyo
  • 专利权人: FUJIKURA LTD.
  • 当前专利权人: FUJIKURA LTD.
  • 当前专利权人地址: JP Tokyo
  • 优先权: JP2007-261233 20071004; JP2007-295607 20071114
  • 国际申请: PCT/JP2008/068194 WO 20081006
  • 主分类号: G01R27/26
  • IPC分类号: G01R27/26
CAPACITIVE PROXIMITY SENSOR AND PROXIMITY SENSING METHOD
摘要:
A capacitive proximity sensor (100) comprises a sensor unit (10) and a sense circuit unit (20). The sensor unit (10) includes a sensor electrode (11), a shield electrode (12) and an auxiliary electrode (13). The sensor electrode (11) is connected to a C-V conversion circuit (21) and the shield electrode (12) is connected to a shield drive circuit (24). The auxiliary electrode (13) is connected via a change-over switch (30) to the C-V conversion circuit (21) or the shield drive circuit (24). The capacitance values (C1, C2) switched by the change-over switch (30) and detected at the C-V conversion circuit (21) are compared to arbitrarily set a range of a sense region on the sensor electrode (11).
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