发明名称 |
CONTROLLER, TOUCH PANEL, ELECTRONIC DEVICE |
摘要 |
To simplify an operation at the time when a controller which can control a touch panel returns to the normal mode. The touch panel includes a capacitive sensor having a pair of electrodes. The controller includes a control switch controlling supply of a potential to one electrode of the capacitive sensor; a current detection circuit detecting current flowing through the other electrode of the capacitive sensor; a power source circuit controlling supply of power source voltage to the current detection circuit; a power supply start switch including a power supply selection transistor whose gate potential is changed in accordance with a potential of the one of the pair of electrodes and controlling output of the power supply start signal to the power source circuit in accordance with a gate potential of the power supply selection transistor; and a control circuit controlling the control switch and the power source circuit. |
申请公布号 |
US2013321333(A1) |
申请公布日期 |
2013.12.05 |
申请号 |
US201313900884 |
申请日期 |
2013.05.23 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO.,LTD.;SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
TAMURA HIKARU |
分类号 |
G06F3/044 |
主分类号 |
G06F3/044 |
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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