Louderspeaker
OwnerRichard Topliss, Anthony Hooley +1inventors
InventorsRichard Topliss, Anthony Hooley, Mark Shepherd
Life of this patent
Estimating the term…
Abstract
A loudspeaker comprises a sound generating element mounted on a support structure, and two rotary actuators I mounted at opposing edges of the sound generating element. The actuators are operable to drive motion of the sound generating element relative to the support structure including a component of rotation. The loudspeaker produces a greater sound output than if driven at one edge only, and is particularly suitable for use in a portable electronic device such as a mobile telephone, in which case the support structure may be a portion of the casing of the, device and the sound generating element maybe a transparent panel covering a display device.
Claims31
A loudspeaker comprising:
- a sound generating element mounted on a support structure;
- two rotary actuators mounted at opposing edges of the sound generating element and operable to drive motion of the sound generating element relative to the support structure by rotating said edges.
27-28. (canceled)
A loudspeaker comprising:
- a sound generating element mounted on a support structure;
- two actuators mounted in opposite halves of the sound generating element and operable to drive motion of the sound generating element relative to the support structure;
- and
- a drive circuit for supplying a separate drive signal to each actuator, including an opposition mixer circuit arranged to derive an opposition signal from each of the separate drive signals by inversion of at least a high frequency component thereof and to mix each respective opposition signal with the other one of the separate drive signals from which the opposition signal was derived.
A loudspeaker comprising:
- a sound generating element mounted on a support structure;
- two actuators mounted in opposite halves of the sound generating element and operable to drive motion of the sound generating element relative to the support structure, the sound generating element comprising a sheet having a physical property which varies across the sheet between the two actuators.
Dependencies are inferred from the claim text.