# US 10,768,660 B2 · Light-emitting audio device, audio output device, and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,768,660 B2 - Document ID: US10768660B2 - Status: Granted - Kind: B2 - Application number: 16/128,983 - Filed: 2018-09-12 - Published: 2019-06-20 - Granted: 2020-09-08 - Earliest claimed: 2017-12-19 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: KiSung Lim; DongRyul Jung - Web page: https://patentgrep.com/patent/US10768660B2 ## CPC - G06F 1/1605: {Multimedia displays, e.g. with integrated or attached speakers, cameras, microphones} - H10W 90/00: Package configurations - H04R 1/028: {associated with devices performing functions other than acoustics, e.g. electric candles} - H04R 9/063: {using a plurality of acoustic drivers (H04R1/24 and H04R1/403 take precedence)} - H10H 20/83: Electrodes - H10H 20/8312: {extending at least partially through the bodies} - H10N 30/871: {Single-layered electrodes of multilayer piezoelectric or electrostrictive devices, e.g. internal electrodes} - H10N 39/00: Integrated devices, or assemblies of multiple devices, comprising at least one piezoelectric, electrostrictive or magnetostrictive element covered by groups H10N30/00 – H10N35/00 - 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 2499/15: Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - 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) - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract A light-emitting audio device, an audio output device, and a display device. The light-emitting audio device includes a micro device integrated with a micro LED device and piezoelectric device. Both image display and audio output can be enabled using a single device. Audio is output using a plurality of light-emitting audio devices disposed in a plurality of subpixels, respectively. An increase in the thickness of the display device due to integrate with a audio function can be minimized. A variety of audio output functions are provided by driving the light-emitting audio devices according to areas. ## Claims ### Claim 1 A light-emitting audio device, comprising: a light-emitting diode comprising a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer; a piezoelectric device comprising a first electrode layer, a second electrode layer, and a piezoelectric material disposed between the first electrode layer and the second electrode layer; an insulator disposed between the light-emitting diode and the piezoelectric device; a protective layer disposed on a surface of at least one of the light-emitting diode and the piezoelectric device; and a plurality of electrodes located on the protective layer to be electrically connected to the light-emitting diode or the piezoelectric device, wherein at least one electrode among the plurality of electrodes is located in a via-hole which passes through at least one of the active layer and the piezoelectric material. ### Claim 2 (depends on 1) The light-emitting audio device according to claim 1, wherein the light-emitting diode, the insulator, and the piezoelectric device are stacked on each other. ### Claim 3 (depends on 1) The light-emitting audio device according to claim 1, wherein the piezoelectric device is located on a side of the light-emitting diode, and the insulator is disposed between a side surface of the light-emitting diode and a side surface of the piezoelectric device. ### Claim 4 (depends on 1) The light-emitting audio device according to claim 1, wherein at least one electrode among the plurality of electrodes is directly connected to the light-emitting diode or the piezoelectric device by the via-hole located within at least one of the light-emitting diode and the piezoelectric device. ### Claim 5 (depends on 4) The light-emitting audio device according to claim 4, wherein one electrode among the plurality of electrodes is electrically connected to one of the first semiconductor layer, the second semiconductor layer, the first electrode layer, and the second electrode layer while being insulated from the other ones of the first semiconductor layer, the second semiconductor layer, the first electrode layer, and the second electrode layer. ### Claim 6 (depends on 5) The light-emitting audio device according to claim 5, wherein the plurality of electrodes include: a first light-emitting electrode electrically connected to the first semiconductor layer; a second light-emitting electrode electrically connected to the second semiconductor layer; a first audio electrode electrically connected to the first electrode layer; and a second audio electrode electrically connected to the second electrode layer. ### Claim 7 (depends on 1) The light-emitting audio device according to claim 1, wherein the piezoelectric material of the piezoelectric device comprises a compound having a crystal structure of formula AB. ### Claim 8 (depends on 1) The light-emitting audio device according to claim 1, wherein a part of the protective layer is located in the via-hole. ### Claim 9 (depends on 1) The light-emitting audio device according to claim 1, wherein the via-hole passes through the insulator, and the protective layer is in contact with the insulator inside the via-hole. ### Claim 10 (depends on 1) The light-emitting audio device according to claim 1, wherein at least one of the first semiconductor layer and the second semiconductor layer is separated from at least one of the first electrode layer and the second electrode layer by the insulator, and wherein a part of the insulator is in contact with the protective layer. ### Claim 11 (depends on 1) The light-emitting audio device according to claim 1, wherein the plurality of electrodes are located within an area where overlaps with the active layer and the piezoelectric material. ### Claim 12 An audio output device, comprising: a substrate; a plurality of light-emitting audio devices disposed on the substrate; and a first driver circuit and a second driver circuit driving the plurality of light-emitting audio devices, wherein each of the plurality of light-emitting audio devices comprises: a light-emitting diode comprising a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer; a piezoelectric device comprising a first electrode layer, a second electrode layer, and a piezoelectric material disposed between the first electrode layer and the second electrode layer; an insulator disposed between the light-emitting diode and the piezoelectric device; a protective layer disposed on a surface of at least one of the light-emitting diode and the piezoelectric device; and a plurality of electrodes located on the protective layer to be electrically connected to the light-emitting diode or the piezoelectric device, wherein at least one electrode among the plurality of electrodes is located in a via-hole which passes through at least one of the active layer and the piezoelectric material. ### Claim 13 (depends on 12) The audio output device according to claim 12, wherein, in each of the plurality of light-emitting audio devices, one electrode among the plurality of electrodes is electrically connected to one of the first semiconductor layer, the second semiconductor layer, the first electrode layer, and the second electrode layer by the via-hole located within at least one of the light-emitting diode and the piezoelectric device while being insulated from the other ones of the first semiconductor layer, the second semiconductor layer, the first electrode layer, and the second electrode layer. ### Claim 14 (depends on 13) The audio output device according to claim 13, wherein the plurality of electrodes include: a first light-emitting electrode electrically connected to the first semiconductor layer; a second light-emitting electrode electrically connected to the second semiconductor layer; a first audio electrode electrically connected to the first electrode layer; and a second audio electrode electrically connected to the second electrode layer. ### Claim 15 (depends on 14) The audio output device according to claim 14, wherein the first driver circuit controls a first polarity voltage to be applied to the first light-emitting electrode and a second polarity voltage to be applied to the second light-emitting electrode, and the second driver circuit controls the second polarity voltage to be applied to the second audio electrode when the first polarity voltage is applied to the first audio electrode and the first polarity voltage to be applied to the second audio electrode when the second polarity voltage is applied to the first audio electrode. ### Claim 16 A display device, comprising: a panel on which a plurality of gate lines, a plurality of data lines, and a plurality of subpixels are disposed; a plurality of light-emitting audio devices disposed in the plurality of subpixels, respectively; and a first driver circuit and a second driver circuit driving the plurality of light-emitting audio devices, wherein each of the plurality of light-emitting audio devices comprises: a light-emitting diode comprising a first semiconductor layer, a second semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer; a piezoelectric device comprising a first electrode layer, a second electrode layer, and a piezoelectric material disposed between the first electrode layer and the second electrode layer; an insulator disposed between the light-emitting diode and the piezoelectric device; a protective layer disposed on a surface of at least one of the light-emitting diode and the piezoelectric device; and a plurality of electrodes located on the protective layer to be electrically connected to the light-emitting diode or the piezoelectric device, wherein at least one electrode among the plurality of electrodes is located in a via-hole which passes through at least one of the active layer and the piezoelectric material. ### Claim 17 (depends on 16) The display device according to claim 16, wherein, in each of the plurality of light-emitting audio devices, one electrode among the plurality of electrodes is electrically connected to one of the first semiconductor layer, the second semiconductor layer, the first electrode layer, and the second electrode layer by the via-hole located within at least one of the light-emitting diode and the piezoelectric device while being insulated from the other ones of the first semiconductor layer, the second semiconductor layer, the first electrode layer, and the second electrode layer. ### Claim 18 (depends on 17) The display device according to claim 17, wherein the plurality of electrodes include: a first light-emitting electrode electrically connected to the first semiconductor layer; a second light-emitting electrode electrically connected to the second semiconductor layer; a first audio electrode electrically connected to the first electrode layer; and a second audio electrode electrically connected to the second electrode layer. ### Claim 19 (depends on 18) The display device according to claim 18, wherein the first driver circuit controls a first polarity voltage to be applied to the first light-emitting electrode and a second polarity voltage to be applied to the second light-emitting electrode, and the second driver circuit controls the second polarity voltage to be applied to the second audio electrode when the first polarity voltage is applied to the first audio electrode and the first polarity voltage to be applied to the second audio electrode when the second polarity voltage is applied to the first audio electrode.