Ceramic-Type Loudspeaker
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United States of America Patent
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N/A
Issued Date -
Oct 4, 2007
app pub date -
Oct 21, 2005
filing date -
Oct 25, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A ceramic-type loudspeaker is provided which can be disposed in any position without marring (spoiling) the design of a room where this loudspeaker is installed and without imposing restrictions on environmental conditions. The ceramic-type loudspeaker which is driven by a drive unit that outputs an audio signal includes: a speaker driver 50 which is formed by electrically connecting a primary winding 54 of a second transformer 46 in series with a secondary winding 53 of a first transformer 45 in which an audio signal is inputted from the drive unit; and a serial-parallel circuit portion 69 which is formed by connecting a plurality of series circuits in parallel, the plurality of series circuits being formed by connecting, in series, first, second ceramic vibrators 25, 26 and third, fourth ceramic vibrators 27, 28 which are driven through an audio signal from a secondary winding 56 of the second transformer 46 of the speaker driver 50. The speaker driver 50 makes an impedance match between the drive unit and the serial-parallel circuit portion 69.
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