# US 2021/0243511 A1 · Display apparatus and electromagnetic actuator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243511 A1 - Document ID: US20210243511A1 - Status: Published application - Kind: A1 - Application number: 17/235,734 - Filed: 2021-04-20 - Published: 2021-08-05 - Earliest claimed: 2019-06-17 - Assignees: Hisense Visual Technology Co., Ltd. - Applicants: Hisense Visual Technology Co., Ltd. - Inventors: FUXIN GUO; HAIYING WANG - Web page: https://patentgrep.com/patent/US20210243511A1 ## CPC - H04R 1/028: {associated with devices performing functions other than acoustics, e.g. electric candles} - 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 7/06: comprising a plurality of sections or layers - H04R 9/02: Details - H04R 9/06: Loudspeakers - H04R 9/066: {using the principle of inertia} - H04R 11/02: Loudspeakers - H04R 2307/021: Diaphragms comprising cellulose-like materials, e.g. wood, paper, linen - H04R 2307/027: Diaphragms comprising metallic materials - H04R 2400/03: Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones - H04R 2440/05: Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels - H04R 2499/15: Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops - 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 Embodiments of the present disclosure provide a display apparatus and an electromagnetic actuator, the display apparatus includes a display structure, a sound-emitting substrate, at least one electromagnetic actuator and a stabilizer; where one side of the sound-emitting substrate is attached to the display structure, and the electromagnetic actuator is fixedly attached to the other side of the sound-emitting substrate through the stabilizer; the electromagnetic actuator includes a bracket and a plurality of flexible support feet extending away from the bracket. The electromagnetic actuator is fixedly arranged on the sound-emitting substrate through the stabilizer, and the bracket receives the electromagnetic actuator, the plurality of flexible support feet can keep the electromagnetic actuator stable during the vibration process of the electromagnetic actuator, which helps avoid position shift of the electromagnetic actuator under long-time working. ## Claims ### Claim 1 A display apparatus, comprising: a display structure, a sound-emitting substrate, at least one electromagnetic actuator and a stabilizer; wherein one side of the sound-emitting substrate is attached to the display structure, and the at least one electromagnetic actuator is fixedly attached to the other side of the sound-emitting substrate through the stabilizer; the stabilizer comprises: a bracket and a plurality of flexible support feet extending away from the bracket, wherein the bracket is configured to receive a first electromagnetic actuator among the at least one electromagnetic actuator, and the plurality of flexible support feet are configured to keep the first electromagnetic actuator stable. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein the plurality of feet are distributed on a peripheral of a first circle whose center is located on an axis of the bracket. ### Claim 3 (depends on 2) The display apparatus according to claim 2, wherein the bracket has a first fixed position whose axis is collinear with the axis of the bracket, and a vibration output of the first electromagnetic actuator passes through the first fixed position of the bracket and abuts against the sound-emitting substrate. ### Claim 4 (depends on 1) The display apparatus according to claim 1, wherein the bracket has a chamber whose shape matches a shape of the first electromagnetic actuator. ### Claim 5 (depends on 1) The display apparatus according to claim 1, further comprising: at least one damping block, a first damping block among the at least one damping block is disposed at one end of a first foot of the plurality of flexible support feet, the first damping block is fixedly arranged on the sound-emitting substrate. ### Claim 6 (depends on 5) The display apparatus according to claim 5, wherein the number of the at least one damping block is less than or equal to the number of the plurality of flexible support feet. ### Claim 7 (depends on 1) The display apparatus according to claim 1, wherein the plurality of flexible support feet are configured to extend around or radially extend away from the bracket. ### Claim 8 (depends on 1) The display apparatus according to claim 1, wherein the sound-emitting substrate comprising: a first skin, a second skin and a middle layer, the first skin is attached to a first side of the middle layer and the second skin is attached to a second side of the middle layer opposite the first side. ### Claim 9 (depends on 8) The display apparatus according to claim 8, wherein the middle layer is formed by connecting a plurality of honeycomb cores whose cross section is hexagonal. ### Claim 10 (depends on 9) The display apparatus according to claim 9, wherein the hexagonal section of the honeycomb cores is stretched at a preset stretch ratio which is less than a preset threshold. ### Claim 11 (depends on 8) The display apparatus according to claim 8, wherein structures of the first skin and the second skin are a mixed fiber structure whose density is different in different directions. ### Claim 12 (depends on 8) The display apparatus according to claim 8, wherein thickness of the first skin is different from that of the second skin. ### Claim 13 (depends on 8) The display apparatus according to claim 8, wherein the at least one electromagnetic actuator comprises: the first electromagnetic actuator and a second electromagnetic actuator; the middle layer comprises: a first area, an isolation area and a second area, wherein the first area and the second area are configured to transmit waves, and the isolation area is configured to attenuate an amplitude of the waves between the first area and the second area; the first electromagnetic actuator is configured to send a magnetic actuating signal to the first area, and the first area is configured to receive and transmit a wave generated from the magnetic actuating signal to make the sound-emitting substrate and the display structure corresponding to the first area vibrate and emit sound; the second electromagnetic actuator is configured to send a magnetic actuating signal to the second area, and the second area is configured to receive and transmit a wave generated from the magnetic actuating signal to make the sound-emitting substrate and the display structure corresponding to the second area vibrate and emit sound. ### Claim 14 (depends on 13) The display apparatus according to claim 13, wherein the first area, the second area and the isolation area consist of honeycomb cores in a hexagonal shape, and stretch ratios of honeycomb cores in the first area and the second area are greater than a stretch ratio of honeycomb cores in the isolation area. ### Claim 15 (depends on 14) The display apparatus according to claim 14, wherein the honeycomb cores in the isolation area are filled with foam damping material. ### Claim 16 (depends on 1) The display apparatus according to claim 1, further comprising: a suspension structure and a support mechanism; wherein the suspension structure is configured to receive the sound-emitting substrate and the display structure; the support mechanism is configured to support and cover a space between the at least one electromagnetic actuator and the suspension structure.