초록 ▼

A piezoelectric speaker which generates sound by vibrating a plane diaphragm using a plurality of piezoelectric drivers is disclosed. The diaphragm is formed of resin foam plates and the piezoelectric drivers are contained therein while being interposed and supported at the centers thereof. The piez

A piezoelectric speaker which generates sound by vibrating a plane diaphragm using a plurality of piezoelectric drivers is disclosed. The diaphragm is formed of resin foam plates and the piezoelectric drivers are contained therein while being interposed and supported at the centers thereof. The piezoelectric drivers are divided into at least two groups which have different primary resonance frequencies.

대표청구항 ▼

A piezoelectric speaker which generates sound by vibrating a diaphragm using piezoelectric drivers, comprising: a plurality of piezoelectric drivers divided into at least two groups which have different primary resonance frequencies, each piezoelectric driver being vibrated in bending mode by piezoe

A piezoelectric speaker which generates sound by vibrating a diaphragm using piezoelectric drivers, comprising: a plurality of piezoelectric drivers divided into at least two groups which have different primary resonance frequencies, each piezoelectric driver being vibrated in bending mode by piezoelectric effect; a diaphragm which is made of resin foam and has a plurality of spaces defined thereon bigger than the piezoelectric drivers, each space containing one of each said piezoelectric driver; piezoelectric supporting means for supporting only the center of each said piezoelectric driver contained in said space; and a frame for supporting said diaphragm without restricting its vibration.