| 摘要 |
<p>"Tactile switch for a domestic appliance, comprising a radiation emitter (21), a receiver adapted to receive at least part of the radiation emitted by the emitter (21) and to generate a reception signal (4) whose value depends on said radiation received, a cover (1) positioned over the emitter (21) and the receiver, and control means (3) adapted to evaluate the reception signal (4) and determine a malfunction in the switch (100) depending of said reception signal (4). The switch (100) also comprises an auxiliary radiation emitter, the receiver being adapted to receive at least part of the radiation emitted by said auxiliary emitter. The control means (3) generate a control pulse at a first time interval to cause the emitter (21) to emit radiation, and generate a test pulse at a second time interval different than the first time interval to cause the auxiliary emitter to emit radiation."</p> |
