# US 10,771,902 B1 · Display apparatus and computing apparatus including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,771,902 B1 - Document ID: US10771902B1 - Status: Granted - Kind: B1 - Application number: 16/447,353 - Filed: 2019-06-20 - Published: 2020-10-01 - Granted: 2020-09-08 - Earliest claimed: 2019-03-29 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Kyungyeol Ryu; Chiwan Kim; YuSeon Kho; YongGyoon Jang - Web page: https://patentgrep.com/patent/US10771902B1 ## CPC - B06B 1/0622: {on one surface} - H04R 17/005: {using a piezoelectric polymer} - B06B 1/06: operating with piezoelectric effect or with electrostriction (piezoelectric or electrostrictive devices per se H10N30/00) - H04R 7/02: characterised by the construction - H04R 7/045: {using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion} - 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}) - H10N 30/092: Forming composite materials - H10N 30/206: {using only longitudinal or thickness displacement, e.g. d33 or d31 type devices} - H10N 30/50: having a stacked or multilayer structure - H10N 30/702: {based on piezoelectric or electrostrictive fibres} - H10N 30/87: Electrodes or interconnections, e.g. leads or terminals - B06B 1/0688: {with foil-type piezoelectric elements, e.g. PVDF} - H04R 1/403: {loud-speakers} - H04R 7/06: comprising a plurality of sections or layers - H04R 2201/003: Mems transducers or their use - H04R 2217/03: Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves - H04R 2499/15: Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops - H10N 30/852: {Composite materials, e.g. having 1-3 or 2-2 type connectivity} - B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R) - 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) - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract A display apparatus includes a display module having a display panel configured to display an image, a sound generation module disposed at the display module and configured to vibrate the display module to generate sound, a first cover configured to cover a first periphery portion of the display module, and a plurality of ultrasonic generation modules disposed between the first periphery portion of the display module and the first cover. The first cover includes a plurality of first holes overlapping with the plurality of ultrasonic generation modules. ## Claims ### Claim 1 A display apparatus, comprising: a display module having a display panel configured to display an image; a sound generation module disposed at the display module and configured to vibrate the display module to generate sound; a first cover configured to cover a first periphery portion of the display module; and a plurality of ultrasonic generation modules disposed between the first periphery portion of the display module and the first cover, wherein the first cover includes a plurality of first holes overlapping with the plurality of ultrasonic generation modules. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein the first cover further comprises: a first cover part configured to cover the plurality of ultrasonic generation modules; and a second cover part connected to the first cover part to cover side surfaces of the display module, wherein the plurality of first holes obliquely penetrates the first cover part. ### Claim 3 (depends on 2) The display apparatus according to claim 2, wherein each of the first holes comprises: a first side exposed to a front surface of the first cover part; a second side exposed to a rear surface of the first cover part; and an inclined surface between the first side and the second side, wherein a shortest distance between the second cover part and the first side is greater than a shortest distance between the second cover part and the second side. ### Claim 4 (depends on 3) The display apparatus according to claim 3, wherein an angle between the inclined surface of each of the first holes and the rear surface of the first cover part is an acute angle. ### Claim 5 (depends on 3) The display apparatus according to claim 3, wherein an angle between the inclined surface of each of the first holes and the rear surface of the first cover part is 15 to 30 degrees. ### Claim 6 (depends on 1) The display apparatus according to claim 1, wherein: the display module includes a front case covering a first periphery portion of the display panel and supporting the sound generation module; the plurality of ultrasonic generation modules are disposed on the front case; and the sound generation module includes a plurality of vibration devices disposed on the front case in parallel to the plurality of ultrasonic generation modules and configured to vibrate the front case to generate sound. ### Claim 7 (depends on 1) The display apparatus according to claim 1, wherein: the display module includes a front case covering a first periphery portion of the display panel and supporting the sound generation module; the plurality of ultrasonic generation modules are disposed on the front case; and the sound generation module is attached to the front case, the sound generation module being adjacent to the plurality of ultrasonic generation modules. ### Claim 8 (depends on 6) The display apparatus according to claim 6, wherein each of the plurality of vibration devices includes a piezoelectric device. ### Claim 9 (depends on 6) The display apparatus according to claim 6, wherein the first cover further includes a plurality of second holes overlapping with the plurality of vibration devices. ### Claim 10 (depends on 1) The display apparatus according to claim 1, wherein the sound generation module includes a vibration device disposed at a rear surface of the display panel, and the vibration device is configured to directly vibrate the display panel to generate sound. ### Claim 11 (depends on 10) The display apparatus according to claim 10, wherein the display module further comprises: a guide frame configured to support the display panel; a backlight unit disposed at a rear surface of the display panel; a second cover having an opening overlapping with a remaining portion of the backlight unit, excluding a second periphery portion of the backlight unit, the second cover being configured to support the second periphery portion of the backlight unit and the guide frame; and a vibration plate covering the opening of the second cover and supporting the sound generation module, wherein the display panel vibrates according to vibration of the vibration plate by the sound generation module and outputs sound. ### Claim 12 (depends on 1) The display apparatus according to claim 1, wherein each of the plurality of ultrasonic generation modules generates longitudinal wave type ultrasonic waves having a frequency of 20 kHz to 40 kHz. ### Claim 13 (depends on 1) The display apparatus according to claim 1, further comprising: a driving circuit configured to sense user manipulation or power off to generate a panel-cleaning control signal, and to vibrate each of the plurality of ultrasonic generation modules according to the panel-cleaning control signal. ### Claim 14 (depends on 1) The display apparatus according to claim 1, wherein: the sound generation module includes a piezoelectric composite layer; and the piezoelectric composite layer includes: a plurality of piezoelectric parts; and a plurality of flexible parts respectively connected between the plurality of piezoelectric parts. ### Claim 15 (depends on 1) The display apparatus according to claim 1, wherein each of the plurality of ultrasonic generation modules includes a piezoelectric body. ### Claim 16 (depends on 15) The display apparatus according to claim 15, wherein: a width of the piezoelectric body is greater than a thickness of the piezoelectric body. ### Claim 17 (depends on 16) The display apparatus according to claim 16, wherein: a length of the piezoelectric body is greater than four or more times the width of the piezoelectric body. ### Claim 18 (depends on 1) A computing apparatus, comprising: a system main body; the display apparatus according to claim 1; and a hinge part mounted between the system main body and the display apparatus and configured to rotatably support the display apparatus. ### Claim 19 (depends on 18) The computing apparatus according to claim 18, wherein each of the plurality of ultrasonic generation modules includes a piezoelectric body. ### Claim 20 (depends on 19) The computing apparatus according to claim 19, wherein a width of the piezoelectric body is greater than a thickness of the piezoelectric body, and a length of the piezoelectric body is greater than four or more times the width of the piezoelectric body. ### Claim 21 A display apparatus, comprising: a display panel configured to display an image; a sound generation module configured to directly vibrate the display panel to generate sound; a front case configured to cover a first periphery portion of the display panel; a plurality of ultrasonic generation modules disposed at the front case; and a first cover covering the plurality of ultrasonic generation modules and including a plurality of holes overlapping with the plurality of ultrasonic generation modules, wherein the plurality of holes obliquely penetrates the first cover. ### Claim 22 (depends on 21) The display apparatus according to claim 21, wherein each of the plurality of holes comprises: a first side exposed to a front surface of the first cover; a second side exposed to a rear surface of the first cover; and an inclined surface between the first side and the second side, wherein an angle between the rear surface of the first cover and the inclined surface is an acute angle. ### Claim 23 (depends on 22) The display apparatus according to claim 22, wherein the angle between the rear surface of the first cover and the inclined surface is 15 to 30 degrees. ### Claim 24 (depends on 21) The display apparatus according to claim 21, wherein: the sound generation module includes a piezoelectric composite layer; and the piezoelectric composite layer includes: a plurality of piezoelectric parts; and a plurality of flexible parts respectively connected between the plurality of piezoelectric parts.