| 摘要 |
<p>The invention refers to a method and device for keying-in and switching, wherein the activation of the key or switch is achieved during the contact between part of the user's body (e.g. finger) with a metallic or other conductive surface which constitutes the outer sensor of the key or the switch and which method and device are characterised by the comparison of a reference wave form, unable to be influenced by user's presence in relation to the same wave form but distorted due to the influence exercised by the contact of user's body which is now acting as a conductor transferring part of the power (current) of the wave form down to the earth and distorting it relatively to the same reference wave form.</p> |
