Plane-Type Speaker and AV Apparatus
First Claim
1. A plane-type speaker comprising:
- a piezoelectric resin film having electrodes on opposed surfaces thereof;
an exciter film having a main surface upon which the piezoelectric resin film is mounted; and
an oscillation plate secured to the exciter film, the oscillation plate being warped in a direction orthogonal to the main surface of the exciter film.
1 Assignment
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Accused Products
Abstract
A plane-type speaker where, on one of the main surfaces of an exciter film, there are placed piezoelectric films which are expanded and contracted by sound-releasing driving signals applied thereto. An oscillation plate is secured to the excited film through frame members. The oscillation plate has a flat-plate shape and is secured to the exciter film while having a warped shape such that it is gradually spaced further away from the exciter film, with decreasing distance from the secured ends to a center area, when viewed at a side surface. This realizes a state where the exciter film is pulled outwardly with respect to the secured ends due to bending stresses therein. If sound-releasing driving signals are applied to the piezoelectric films in this state, the exciter film contracts and expands along with the expansion and contraction of the piezoelectric films, thereby causing the oscillation plate to oscillate.
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Citations
20 Claims
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1. A plane-type speaker comprising:
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a piezoelectric resin film having electrodes on opposed surfaces thereof; an exciter film having a main surface upon which the piezoelectric resin film is mounted; and an oscillation plate secured to the exciter film, the oscillation plate being warped in a direction orthogonal to the main surface of the exciter film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A plane-type speaker comprising:
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a piezoelectric resin film having electrodes on opposed surfaces thereof; an exciter film having a main surface upon which the piezoelectric film is mounted; and an oscillation plate having a surface which is warped in a state where the oscillation plate is not secured to the exciter film, and, when the oscillation plate is secured to the exciter film, the surface of the oscillation plate has a flattened shape with respect to the main surface of the exciter film. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification