# US 10,313,801 B2 · Sound output device comprises a dual speaker including a dynamic speaker and a piezoelectric speaker > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,313,801 B2 - Document ID: US10313801B2 - Status: Granted - Kind: B2 - Application number: 15/553,168 - Filed: 2016-02-23 - Published: 2018-05-03 - Granted: 2019-06-04 - Earliest claimed: 2015-02-24 - Assignees: Moda-Innochips Co., Ltd. - Applicants: Moda-Innochips Co., Ltd. - Inventors: Sung Cheol Park; Sang Hun Park; In Seob Jung - Web page: https://patentgrep.com/patent/US10313801B2 ## CPC - H04R 23/02: Transducers using more than one principle simultaneously - H04R 1/025: {Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture} - H04R 1/24: Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges - H04R 3/14: Cross-over networks - H04R 9/06: Loudspeakers - H04R 17/00: Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) - H04R 9/025: {Magnetic circuit} - H04R 17/005: {using a piezoelectric polymer} - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) ## Abstract Provided is a sound output apparatus including: a housing having a housing space therein; a first sound output unit provided inside the housing; and a second sound output unit provided in the housing and spaced a predetermined distance from the first sound output unit. ## Claims ### Claim 1 A sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker comprising: a housing having a housing space therein; a dynamic speaker provided inside the housing; and a piezoelectric speaker provided inside the housing and spaced a predetermined distance from the dynamic speaker; wherein the piezoelectric speaker comprises a plate-shaped piezoelectric device and a plate-shaped vibration device provided on one surface of the piezoelectric device and having the same thickness over the entire area thereof, wherein the housing which comprises a first member and at least one second member surrounding the first member and of which at least a portion surrounds a spaced space between the dynamic speaker and the piezoelectric speaker, wherein the first member has a shape of a plate blocking the dynamic speaker from the piezoelectric speaker to separate the dynamic speaker and the piezoelectric speaker so that sounds emitted from the dynamic speaker and the piezoelectric speaker, respectively, are not mixed; and wherein a sound output from the dynamic speaker is emitted through an emission hole formed in at least a predetermined region of the housing. ### Claim 2 (depends on 1) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 1, wherein a separation space is provided between the dynamic speaker and piezoelectric speaker, and the emission hole is formed such that at least a portion of the emission hole corresponds to the separation space. ### Claim 3 (depends on 1) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 1, wherein a stepped portion is formed on at least one region of one surface of the first member. ### Claim 4 (depends on 3) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 3, wherein the piezoelectric speaker contacts the stepped portion of the first member, and the dynamic speaker is spaced from the other surface opposite to the one surface. ### Claim 5 (depends on 4) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 4, further comprising at least one protrusion protruding from the inner portion of the second member. ### Claim 6 (depends on 5) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 5, wherein the first member is provided on an upper portion of the protrusion, and the dynamic speaker is in contact with a lower portion of the protrusion. ### Claim 7 (depends on 6) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 6, wherein the emission hole is formed to correspond to a space between the first member and the dynamic speaker. ### Claim 8 (depends on 7) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 7, wherein the emission hole is formed to have an area of about 5% to about 90% of the top surface area of the dynamic speaker. ### Claim 9 (depends on 8) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 8, further comprising a coating layer formed on at least a portion of at least one of the dynamic speaker and piezoelectric speaker, or the housing. ### Claim 10 (depends on 9) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 9, wherein the dynamic speaker and piezoelectric speaker are driven at the same time by a signal having the same level. ### Claim 11 (depends on 10) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 10, wherein the dynamic speaker and piezoelectric speaker are driven in a voltage range of about 0.1V to about 5.0V. ### Claim 12 (depends on 11) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 11, wherein the piezoelectric speaker comprises a vibration device having an opening, and a piezoelectric device provided on at least one surface over the opening of the vibration device. ### Claim 13 (depends on 1) The sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker of claim 1, wherein a sound output from the piezoelectric speaker is output through the dynamic speaker, and emitted through the emission hole are mixed outside the housing. ### Claim 14 A sound output device comprising a dual speaker including a dynamic speaker and a piezoelectric speaker comprising: a housing having a housing space therein; a dynamic speaker provided inside the housing; a piezoelectric speaker provided inside the housing and spaced a predetermined space from the dynamic speaker; and a separation member provided between the dynamic speaker and piezoelectric speaker inside the housing to separate the dynamic speaker and piezoelectric speaker from each other; and at least one emission hole formed at a predetermined region of the housing, wherein the piezoelectric speaker comprises a plate-shaped piezoelectric device and a plate-shaped vibration device provided on one surface of the piezoelectric device and having the same thickness over the entire area thereof, wherein the housing has at least a portion surrounding a spaced space between the dynamic speaker and the piezoelectric speaker, wherein the separation member having a plate shape is provided between the dynamic speaker and the piezoelectric speaker to separate the dynamic speaker and the piezoelectric speaker so that sounds emitted from the dynamic speaker and the piezoelectric speaker, respectively, are not mixed, wherein the emission hole is defined in a region corresponding to a spaced space between the dynamic speaker and the separation member, and wherein a sound output from the dynamic speaker is emitted through the emission hole.