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US 11,546,680 B2Granted
Flat plate transducer
OwnerF. Bruce Thigpeninventor
Life of this patent
Estimating the term…
Abstract
A flat plate audio transducer. A front panel and a back panel are connected via a frame. One or more electromagnetic actuators are mounted between the two panels. Voice coils are used as the actuators in some embodiments. Stiffening braces are preferably run between groups of actuators to prevent unwanted resonance phenomena. In some embodiments an actuator array moves both the front and back panels. In other embodiments only one panel is moved.
Claims20
A sound transducer, comprising:
- (a) a front panel made of thin material, said front panel having a front panel perimeter;
- (b) a back panel made of thin material, said back panel having a back panel perimeter;
- (c) a frame joining said front panel perimeter to said back panel perimeter;
- (d) an actuator having a first side and a second side, said actuator being configured to respond to a first electrical current by urging said first side away from said second side and a second electrical current by urging said first side toward said second side;
- (e) said first side of said actuator being attached to said front panel;
- (f) said second side of said actuator being attached to said back panel;
- and
- (g) a plurality of openings passing through said front panel.
5 more elements
A sound transducer, comprising:
- (a) a flexible front panel having a front panel perimeter;
- (b) a flexible back panel having a back panel perimeter;
- (c) a frame joining said front panel to said back panel, but leaving an open interior;
- (d) an actuator having a first side and a second side, said actuator being located in said open interior area, said actuator configured to respond to a first electrical current by urging said first side away from said second side and a second electrical current by urging said first side toward said second side;
- (e) said first side of said actuator being attached to said front panel;
- and
- (f) said second side of said actuator being attached to said back panel.
4 more elements
Dependencies are inferred from the claim text.