Abstract:
An electromagnetic wave absorber including a substrate and a plurality of magnetic material bodies is provided. The plurality of magnetic material bodies are disposed on the substrate in an array, so that the electromagnetic wave absorber has a plurality of electromagnetic wave absorption frequencies in addition to an electromagnetic wave characteristic frequency of the plurality of magnetic material bodies. A ratio of one of the plurality of electromagnetic wave absorption frequencies to the electromagnetic wave characteristic frequency is greater than 1 and is less than or equal to 6.
Abstract:
A touch pad with a feedback function and a touch device using the same are provided. The provided touch pad includes a touch sensing film layer and a vibration film layer, where the vibration film layer is disposed above the touch sensing film layer and includes a permanent charge layer. Moreover, the vibration film layer is configured for generating vibration in response to a touch event on the touch sensing film layer.