Audio transducers
AssigneeNokia Mobile Phones Ltd.
InventorsMarkku Lipponen, Erkki Nokkonen, Janne Haavisto
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Abstract
A device (MS) having an electrical display (DSPL) is equipped with a transparent electrostatic diaphragm (ACT) vibrateably attached in front of the display. The display has been made electrically conductive and used as a stator of thus formed electrostatic speaker (TD1). A fluctuating DC-voltage is conducted to the diaphragm and display in order to resonate the diaphragm and produce sound respective to the fluctuation. The transparency of the diaphragm allows a user to see the display through the diaphragm. Alternatively, the similar arrangement can be used to implement a transparent electrostatic microphone on the display.
Claims12
An audio transducer for changing a signal between an acoustic form and an electrical form, comprising an actuating diaphragm, a stator, and a support for supporting the actuating diaphragm adjacent to the stator, wherein both the actuating diaphragm and the stator comprise transparent material, and the support is arranged to prevent the actuating diaphragm from touching the stator.
An audio-visual device comprising an optical device, and an audio transducer for changing a signal between an acoustic form and an electrical form, comprising an actuating diaphragm, a stator, and a support for supporting the actuating diaphragm adjacent to the stator, wherein both the actuating diaphragm and the stator comprise transparent material, and the audio transducer is arranged adjacent to the optical device, and the support is arranged to prevent the actuating diaphragm from touching the stator.
Dependencies are inferred from the claim text.