WO2021238485A1 - 显示装置及其工作方法 - Google Patents

显示装置及其工作方法 Download PDF

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Publication number
WO2021238485A1
WO2021238485A1 PCT/CN2021/087458 CN2021087458W WO2021238485A1 WO 2021238485 A1 WO2021238485 A1 WO 2021238485A1 CN 2021087458 W CN2021087458 W CN 2021087458W WO 2021238485 A1 WO2021238485 A1 WO 2021238485A1
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WO
WIPO (PCT)
Prior art keywords
sound
display device
display
display screen
audience
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PCT/CN2021/087458
Other languages
English (en)
French (fr)
Inventor
勾越
刘英明
姬雅倩
李秀锋
韩艳玲
张晨阳
李佩笑
郭玉珍
韩文超
张良浩
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/762,323 priority Critical patent/US11979737B2/en
Publication of WO2021238485A1 publication Critical patent/WO2021238485A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation
    • H04S7/303—Tracking of listener position or orientation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/02—Microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/01—Acoustic transducers using travelling bending waves to generate or detect sound
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/11—Positioning of individual sound objects, e.g. moving airplane, within a sound field

Definitions

  • the present disclosure relates to the field of display technology, in particular to a display device and a working method thereof.
  • the related art proposes a screen sounding display screen, which generally uses a vibration exciter to vibrate the display panel or a diaphragm fixed on the display panel to generate sound waves.
  • the principle is to input the driving energy corresponding to the audio signal to the vibration exciter through the controller.
  • the display panel vibrates to produce sound on the screen. Because it does not have a traditional sound output device such as a traditional speaker, the stereo sound effect is generally poor, which affects the user experience.
  • the technical problem to be solved by the present disclosure is to provide a display device and a working method thereof, which can enhance the sound effect generated on the screen and improve the user experience.
  • a display device which includes a display screen and a sound driving module, and further includes:
  • the acoustic scanning module arranged on the non-display side of the display screen is configured to scan through acoustic waves to determine the spatial contour of the space where the display device is located;
  • the audience position detection module is configured to detect the coordinates of the audience in the space where the display device is located;
  • the control module is configured to control the utterance drive module to emit sound according to the spatial outline and the audience coordinates.
  • control module is specifically configured to determine the power and phase values of the audio signal corresponding to the optimal sound field at the audience coordinates according to the audience coordinates and the spatial outline, and according to the obtained audio
  • the power and phase value of the signal control the sounding drive module to sound.
  • the sound driving module includes a first sound driving module and a second sound driving module.
  • the first sound driving module is connected to the left channel of the audio signal and is arranged on the right side of the non-display side of the display screen.
  • the second sound driving module is connected to the right channel of the audio signal, and is arranged on the left side of the non-display side of the display screen, and the first sound driving module and the second sound driving module are configured according to the
  • the audio signal output by the control module drives the display screen to vibrate to generate corresponding sound waves, and the sound waves are combined to generate a sound field.
  • the audience position detection module adopts an infrared camera arranged at the edge of the display screen.
  • the acoustic scanning module includes a sound wave emitting structure and a sound wave receiving structure disposed on the non-display side of the display screen, the sound wave emitting structure is configured to emit ultrasonic waves, and the sound wave receiving structure is configured to receive The ultrasonic waves reflected by obstacles around the display device determine the spatial contour of the space where the display device is located according to the received ultrasonic waves.
  • the frequency of the ultrasonic waves is less than 30KHz.
  • the display device includes a hard substrate disposed on the non-display side of the display screen, the hard substrate and the display screen are packaged together, and the hard substrate is between the hard substrate and the display screen.
  • a certain distance between the hard substrate and the display screen forms a accommodating cavity, and the acoustic wave emitting structure and the acoustic wave receiving structure are arranged in the accommodating cavity.
  • the acoustic wave receiving structure includes a first electrode, a second electrode, and a piezoelectric material located between the first electrode and the second electrode.
  • the piezoelectric material uses piezoelectric ceramics or piezoelectric films.
  • the acoustic wave transmitting structure is multiplexed into the acoustic wave receiving structure.
  • the acoustic wave emitting structure is arranged corresponding to the central area of the display screen, and the acoustic wave receiving structure is evenly distributed on the non-display side of the display screen.
  • the display screen is composed of multiple spliced sub-display screens, and the sub-display screens are LED display screens or OLED display screens.
  • the embodiment of the present disclosure also provides a working method of a display device, which should be configured as the above-mentioned display device, and the working method includes:
  • FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the disclosure
  • FIG. 2 is a schematic flowchart of a working method of a display device according to an embodiment of the disclosure
  • FIG. 3 is a schematic diagram of detecting a spatial contour according to an embodiment of the disclosure.
  • FIG. 6 is a schematic diagram of a working flow of a display device according to an embodiment of the disclosure.
  • FIG. 7 is a schematic cross-sectional view of a display device according to an embodiment of the disclosure.
  • FIG. 8 is a schematic diagram of a sound wave receiving structure according to an embodiment of the disclosure.
  • FIG. 9 is a schematic diagram of the sound field division according to an embodiment of the disclosure.
  • the embodiments of the present disclosure provide a display device and a working method thereof, which can enhance the sound effect generated on the screen and improve the user experience.
  • the embodiment of the present disclosure provides a display device, including a display screen and a sound driving module 14, as shown in FIG. 1, further including:
  • the acoustic scanning module 11 arranged on the non-display side of the display screen is configured to determine the spatial contour of the space in which the display device is located through acoustic scanning;
  • the audience position detection module 12 is configured to detect the coordinates of the audience in the space where the display device is located;
  • the control module 13 is configured to control the sound driving module to sound according to the spatial contour and the audience coordinates.
  • the spatial contour of the space where the display device is located is determined by sonic scanning, and the audience coordinates in the space where the display device is located are detected. According to the space contour and the audience coordinates, the optimal sound field at the audience coordinates can be determined.
  • the optimal sound field determines the audio signal to be output, and controls the sound driving module to sound according to the obtained audio signal, so that the optimal sound field can be constructed at the audience coordinates in real time, which improves the sound effect generated on the screen and improves the user experience.
  • control module 13 is specifically configured to determine the power and phase values of the audio signal corresponding to the optimal sound field at the audience coordinates according to the audience coordinates and the spatial contour, and according to the obtained The power and phase value of the audio signal control the sounding drive module 14 to sound.
  • the display screen is only driven to vibrate and sound by the sound driving module 14 without distinguishing the scene where the display screen is located. This cannot guarantee the user experience of each viewer; in this embodiment, the spatial outline of the space where the display device is located is detected as well as Audience coordinates, adjust the power and phase value of the audio signal according to the spatial outline and the audience coordinates, which can improve the user experience of the audience.
  • the sound driving module 14 may be a vibration exciter or another device that drives energy to obtain mechanical vibration, and the above-mentioned drive energy may be electric, electromagnetic, piezoelectric, or the like.
  • the sound driving module 14 can drive the display screen to vibrate to generate corresponding sound waves according to the audio signal sent by the control module 13.
  • the display screen driven by the vibration exciter can produce larger displacement and impact force, and the sound effect is better.
  • the sound production method of this embodiment is not limited to the display screen vibrating sound
  • the display device may also include an independent speaker assembly, and the sound driving module 14 drives the speaker assembly to produce sound.
  • the display device of this embodiment may further include a first fixing device and a second fixing device.
  • the first fixing device is configured to fix the sound driving module 14 to the back plate of the display device
  • the second fixing device is configured to be the sound driving module 14 Fixing with the display screen; in actual use, the first fixing device usually uses the housing of the sound driving module to connect with the fixing seat and then fixes it on the back plate with screws.
  • the second fixing device is usually made of rubber strips. The sound driving module 14 is effectively fixed, so that the energy consumption of the audio signal is small during the transmission process.
  • the sound driving module 14 includes a first sound driving module and a second sound driving module.
  • the first sound driving module is connected to the left channel of the audio signal and is arranged on the right side of the non-display side of the display screen.
  • Side the second sound driving module is connected to the right channel of the audio signal, and is arranged on the left side of the non-display side of the display screen.
  • the first sound driving module and the second sound driving module are configured to
  • the audio signal output by the control module 13 drives the display screen to vibrate to generate corresponding sound waves, and the sound waves are combined to generate a sound field.
  • the cost of the two sound driving modules is low, and the sound field and the picture can be positioned synchronously by connecting the left and right channels of the audio signal of the control module 13, and the production process is simple.
  • the sound driving module 14 is not limited to include the first sound driving module and the second sound driving module, and may also include more sound driving modules, not only divided by left and right channels, but also The left, center and right channel partitions or include more channel partitions, each channel can be composed of multiple sound driving modules, and multi-channel cooperation can build a surround sound field.
  • the sounding parameters of the sounding driving module of each channel partition can be designed according to the audience coordinates and the spatial outline.
  • the spatial contour of the space where the display device is located is determined by acoustic wave scanning.
  • the acoustic scanning module 11 includes an acoustic wave emitting structure and an acoustic wave receiving structure arranged on the non-display side of the display screen, so The acoustic wave transmitting structure is configured to emit ultrasonic waves, and the acoustic wave receiving structure is configured to receive ultrasonic waves reflected by obstacles around the display device, and determine the spatial contour of the space in which the display device is located according to the received ultrasonic waves.
  • the sound wave receiving structure can use piezoelectric sensors.
  • a radiated sound field covering all directions in the space where the display device is located can be constructed, and the sound absorption coefficients and reflection angles of different interfaces in the space can be used.
  • the spatial contour of the space where the display device is located can be determined by the spatial information carried by the echo signal reflected by the obstacle.
  • the audience position detection module 12 adopts an infrared camera arranged at the edge of the display screen.
  • the infrared camera can capture the audience and determine the coordinates of the audience.
  • the audience position detection module 12 is not limited to using an infrared camera, and can also be a common visible light camera, but using an infrared camera can also capture the audience in a dark environment and determine the coordinates of the audience.
  • the number of infrared cameras can be one or more. In order to ensure the accuracy of detection, the number of infrared cameras is proportional to the size of the display screen. When the number of infrared cameras is multiple, each infrared camera is configured to acquire an image of a predetermined area. Specifically, the infrared camera may be configured to recognize the facial information of the audience from the image of the predetermined area, and the control module may be configured to calculate the position information of the audience based on the recognized facial information of the audience.
  • recognizing the facial information of the audience from the image of the predetermined area may include: recognizing the relative position of the facial image of the audience in the image of the predetermined area, and the position information of the audience can be calculated based on this.
  • Human facial images have many effective features, so facial recognition is easy to implement.
  • the facial images of people and people are quite different, so the calculation process of distinguishing different audiences through facial recognition is easy to implement.
  • the position of the recognized facial image of the audience that is, the position of the audience’s ears
  • the use of facial recognition can be said to locate the position information of the audience, or it can be said to locate the position of the audience’s ears. It can achieve precise positioning and sounding more accurately.
  • FIG. 2 is a schematic flowchart of a working method of a display device according to an embodiment of the disclosure. As shown in FIG. 2, the working method of the display device includes:
  • Step 101 Determine the spatial contour of the space in which the display device is located by sonic scanning
  • Step 102 Detect the coordinates of the audience in the space where the display device is located;
  • Step 103 Control the utterance drive module to emit sound according to the spatial outline and the audience coordinates.
  • the sound emission structure of the display device starts and emits medium and low frequency ultrasonic waves.
  • Ultrasound is a part of the sound wave, which is inaudible to human ears and the frequency is higher than 20KHZ.
  • the sound wave with a frequency higher than 30KHz has a relatively large loss in the air. Therefore, the frequency of the ultrasonic wave emitted by the sound wave emitting structure can be less than 30KHz.
  • the specific frequency of the ultrasonic wave emitted by the acoustic wave emitting structure depends on the size of the display device and the size of the space environment.
  • the acoustic wave emitting structure will radiate sound waves non-directionally in all directions in the space, and the sound waves can have different reflection angles according to different reflection boundaries. And the characteristics of reflectivity to analyze the reflected sound waves received by the sound wave receiving structure.
  • the control module can reverse the boundary conditions in the performance space by performing inverse time transformation on the echoes of various positions received by the sound wave receiving structure.
  • Figure 3 shows the construction principle of the space sound field.
  • a sound wave emitting structure 111 and a sound wave receiving structure (not shown) are arranged on the side.
  • the sound wave emitting structure 111 radiates sound waves non-directionally in all directions in the space, and the sound waves are reflected back to the display screen by obstacles A and B, where 16 denotes The propagation path of sound waves, the sound wave receiving structure can receive the reflected sound waves, the control module analyzes the sound waves received by the sound wave receiving structure, and then constructs the spatial outline of the space where the display device is located, including but not limited to where the display device is located The size of the room, the distribution of obstacles in the room, etc.
  • the acoustic wave emitting structure 111 and the acoustic wave receiving structure can be arranged in the area shown by the dashed frame of the display screen 15.
  • the display screen 15 may be composed of a plurality of spliced sub-display screens 151, and the sub-display screens are LED display screens or OLED display screens.
  • Both the acoustic wave emitting structure 111 and the acoustic wave receiving structure are located on the non-display side of the display screen, and the acoustic wave emitting structure 111 needs to be separated from the acoustic wave receiving structure by a certain distance; the acoustic wave emitting structure 111 can be located in the center area of the display screen 15 (that is, as shown by the dotted frame in the middle) Area), the sound wave receiving structure can be evenly distributed on the non-display side of the display screen, specifically, it can be distributed in all the areas shown by the dotted frame of the display screen 15.
  • the module can reverse the sound field conditions in their respective areas according to the sound wave signals received by the sound wave receiving structure.
  • the acoustic wave receiving structure In order to reduce the mutual interference between the acoustic wave emitting structure 111 and the acoustic wave receiving structure, the acoustic wave receiving structure needs to be turned on after the acoustic wave emitting structure 111 has emitted the acoustic wave.
  • the acoustic wave emitting structure 111 can be converted into an acoustic wave receiving structure after the acoustic wave emission is completed, that is, the acoustic wave emitting structure.
  • 111 is multiplexed into the sound wave receiving structure, and the sound wave emitting structure 111 can receive the sound waves reflected in the direction directly opposite to the display screen 15.
  • the acoustic wave emission structure 111 can be arranged in the central area of the display screen 15, and arranged in the corresponding areas of the four dashed-line frames on the periphery.
  • Acoustic wave receiving structure in addition, the acoustic wave transmitting structure 111 can also be multiplexed into an acoustic wave receiving structure.
  • the number of sound wave receiving structures is directly proportional to the size of the display screen 15.
  • the sound wave emitting structure 111 can be set in the central area of the display screen 15.
  • An acoustic wave receiving structure is provided in the corresponding area.
  • the acoustic wave transmitting structure 111 can also be multiplexed into an acoustic wave receiving structure.
  • the sound wave transmitting structure 111 and the sound wave receiving structure are used to determine the spatial outline of the space where the display device is located, an infrared camera can be used to capture the position of the audience in the space, and the control module 13 can be used to adjust the position of the audience to the best reverberation and the best sound field
  • the corresponding audio signal at the optimal reverberation and optimal sound field is transmitted to the sound driving module 14.
  • the sound driving module 14 drives the display to sound, forming sounds of different frequencies and loudness in different areas. In order to achieve the best look and feel of the listener.
  • the sounding mode of the technical solution of this embodiment is not limited to the display screen vibrating and sounding, and a speaker assembly may be additionally provided, and the speaker assembly is driven to emit sound through the sounding driving module 14, and the speaker assembly is connected to the sounding driving module 14.
  • the working process of the display device of this embodiment is: the control module activates the acoustic wave emitting structure 111, the acoustic wave emitting structure 111 emits acoustic wave signals, and the acoustic waves echo in all directions after encountering obstacles, and the acoustic wave receiving structure receives the reflected back
  • the sound wave signal sends the sound wave signal to the control module.
  • the control module can construct the space of the display device according to the sound wave signal received by the sound wave receiving structure; at the same time, the infrared camera detects the position of the audience in the space, and the control module according to the position of the display device.
  • the space and the position of the audience adjust the audience position to the best reverberation and the best sound field, and transmit the corresponding audio signal at the best reverberation and the best sound field to the sound drive module.
  • FIG. 7 is a schematic cross-sectional view of the display device of this embodiment.
  • the display device includes a hard substrate 19 disposed on the non-display side of the display screen 15, and the hard substrate 19 is connected to the
  • the display screen 15 can be sealed together by a frame sealant 17, and the rigid substrate 19 and the display screen 15 are spaced a certain distance apart to form an accommodating cavity between the rigid substrate 19 and the display screen 15. 18.
  • the acoustic wave emitting structure and the acoustic wave receiving structure can be arranged in the containing cavity 18, and the containing cavity 18 can protect the acoustic wave emitting structure and the acoustic wave receiving structure.
  • An infrared camera 121 may be provided in the edge area of the display screen 15.
  • the sound wave transmitting structure and the sound wave receiving structure and the display screen 15 can be bonded by glue or a medium with better sound permeability.
  • the acoustic wave receiving structure may adopt a piezoelectric sensor. As shown in FIG. 8, the acoustic wave receiving structure includes a first electrode 21, a second electrode 23, and a pressure between the first electrode 21 and the second electrode 23. Electric material 22.
  • the choice of piezoelectric material 22 and the base substrate of the display screen is related to the size of the display and the environment.
  • the piezoelectric material 22 can use piezoelectric ceramics and piezoelectric films, etc., and the base substrate of the display can use silicon substrates or quartz substrates. Or glass substrate, etc., but it is necessary to consider whether the sound pressure characteristics of the piezoelectric material combined with the screen can meet the working requirements.
  • the piezoelectric material 22 can use piezoelectric ceramics to generate greater vibration
  • the base substrate of the display screen is a glass substrate; when the size of the display screen is small, the piezoelectric material 22 can be selected Piezoelectric film material and the material of the base substrate of the display screen can be changed appropriately.
  • the piezoelectric material 22 can be stacked by one or more piezoelectric sheets with different polarization directions, and the different polarization directions can be matched with the input positive and negative voltages.
  • the structure of the acoustic wave emitting structure and the acoustic wave receiving structure are roughly the same, but according to different performance requirements, the piezoelectric material ratio, size, and working frequency of the acoustic wave emitting structure and the acoustic wave receiving structure are different.
  • the acoustic wave receiving structure needs to select a smaller piezoelectric material, and it needs to work in a high-frequency state to have a larger range of receiving sensitivity.
  • the technical solution of this embodiment can improve the stereo effect on the basis of the existing display sound device, and reduce the reverberation effect of the sound in a large space.
  • the application scenario of this embodiment is not limited to display sound field construction, and may also be configured for interior design and somatosensory AI games.
  • the control module simulates the optimal sound field of the entire space, the sound can be controlled in different areas, so that the audience position has the best sound effect.
  • the space where the display screen is located can be roughly divided into three regions C, D, and E.
  • the control module outputs the audio signal to the sound drive module to form direct audio in area D, while the other two areas C and E can build an environment Sound, so as to make the sound richer and achieve stereo.
  • the environmental sound field requirements are low, you can only control the display screen or speaker in the corresponding area to emit sound, which can reduce energy consumption.
  • the infrared camera when the infrared camera detects that the person's position is in area D, it can control only the sub-display or speaker corresponding to area D to emit sound, and the sub-display or speaker corresponding to areas C and E does not emit sound, which can reduce the consumption of the display device. can.
  • the spatial contour of the space where the display device is located is determined by sonic scanning, and the audience coordinates in the space where the display device is located are detected. According to the space contour and the audience coordinates, the optimal sound field at the audience coordinates can be determined.
  • the optimal sound field determines the audio signal to be output, and controls the sound driving module to sound according to the obtained audio signal, so that the optimal sound field can be constructed at the audience coordinates in real time, which improves the sound effect generated on the screen and improves the user experience.
  • the display device of this embodiment includes but is not limited to: radio frequency unit, network module, audio output unit, input unit, sensor, display unit, user input unit, interface unit, memory, processor, power supply and other components.
  • radio frequency unit network module
  • audio output unit input unit
  • sensor sensor
  • display unit user input unit
  • interface unit memory, processor, power supply and other components.
  • memory processor
  • power supply and other components Those skilled in the art can understand that the structure of the above display device does not constitute a limitation on the display device, and the display device may include more or less of the above components, or combine some components, or arrange different components.
  • the display device may be any product or component with a display function such as a TV, a monitor, a digital photo frame, etc., wherein the display device also includes a flexible circuit board, a printed circuit board, and a backplane.
  • sequence number of the steps cannot be configured to limit the sequence of the steps.
  • sequence of the steps is not required to be creatively worked. Changes are also within the protection scope of the present disclosure.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

本公开提供了一种显示装置及其工作方法，属于显示技术领域。其中，显示装置包括显示屏和发声驱动模块，还包括：设置在所述显示屏的非显示侧的声学扫描模块，被配置为通过声波扫描，确定所述显示装置所处空间的空间轮廓；观众位置检测模块，被配置为检测所述显示装置所处空间中的观众坐标；控制模块，被配置为根据所述空间轮廓和所述观众坐标控制所述发声驱动模块发声。本公开的技术方案能够提升屏幕发生的音效，改善用户体验。

Description

显示装置及其工作方法
相关申请的交叉引用
本申请主张在2020年5月27日在中国提交的中国专利申请号No.202010461014.9的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及显示技术领域，特别是指一种显示装置及其工作方法。
背景技术
相关技术提出了一种屏幕发声显示屏，屏幕发声一般采用振动激励器振动显示面板或者固定在显示面板上的膜片来产生声波。其原理是通过控制器输入与音频信号对应的驱动能量至振动激励器，振动激励器内部有置于磁场中的线圈，从而产生受音频信号控制的磁场，来驱动与线圈相连的工作台，带动显示面板振动实现屏幕发声，由于其没有传统的扬声器等传统的声音输出设备，一般立体音效较差，影响了用户体验。
发明内容
本公开要解决的技术问题是提供一种显示装置及其工作方法，能够提升屏幕发生的音效，改善用户体验。
为解决上述技术问题，本公开的实施例提供技术方案如下：
一方面，提供一种显示装置，包括显示屏和发声驱动模块，还包括：
设置在所述显示屏的非显示侧的声学扫描模块，被配置为通过声波扫描，确定所述显示装置所处空间的空间轮廓；
观众位置检测模块，被配置为检测所述显示装置所处空间中的观众坐标；
控制模块，被配置为根据所述空间轮廓和所述观众坐标控制所述发声驱动模块发声。
一些实施例中，所述控制模块具体被配置为根据所述观众坐标和所述空间轮廓确定在所述观众坐标处得到最优声场所对应的音频信号的功率及相位 值，根据所得到的音频信号的功率及相位值控制所述发声驱动模块发声。
一些实施例中，所述发声驱动模块包括第一发声驱动模块和第二发声驱动模块，所述第一发声驱动模块与音频信号左声道连接，设置于所述显示屏非显示侧的右侧，所述第二发声驱动模块与音频信号右声道连接，设置于所述显示屏非显示侧的左侧，所述第一发声驱动模块和所述第二发声驱动模块被配置为根据所述控制模块输出的音频信号驱动所述显示屏振动产生对应声波，声波合并产生声场。
一些实施例中，所述观众位置检测模块采用设置在所述显示屏边缘的红外相机。
一些实施例中，所述声学扫描模块包括设置在所述显示屏的非显示侧的声波发射结构和声波接收结构，所述声波发射结构被配置为发出超声波，所述声波接收结构被配置为接收被所述显示装置周围障碍物反射回的超声波，根据接收到的超声波确定所述显示装置所处空间的空间轮廓。
一些实施例中，所述超声波的频率小于30KHz。
一些实施例中，所述显示装置包括设置在所述显示屏的非显示侧的硬质基板，所述硬质基板与所述显示屏封装在一起，所述硬质基板与所述显示屏之间间隔一定距离以在所述硬质基板与所述显示屏之间形成容纳腔，所述声波发射结构和声波接收结构设置在所述容纳腔内。
一些实施例中，所述声波接收结构包括第一电极、第二电极和位于所述第一电极与所述第二电极之间的压电材料。
一些实施例中，所述压电材料采用压电陶瓷或压电薄膜。
一些实施例中，所述声波发射结构复用为所述声波接收结构。
一些实施例中，所述声波发射结构对应所述显示屏的中心区域设置，所述声波接收结构均匀分布在所述显示屏的非显示侧。
一些实施例中，所述声波接收结构被配置为在所述声波发射结构发出超声波N秒后开启，N＝2d/340，d为所述显示装置与所处空间中最近的障碍物之间的距离，单位为米。
一些实施例中，所述显示屏由多个拼接的子显示屏组成，所述子显示屏 为LED显示屏或OLED显示屏。
本公开实施例还提供了一种显示装置的工作方法，应被配置为如上所述的显示装置，所述工作方法包括：
通过声波扫描，确定所述显示装置所处空间的空间轮廓；
检测所述显示装置所处空间中的观众坐标；
根据所述空间轮廓和所述观众坐标控制所述发声驱动模块发声。
附图说明
图1为本公开实施例显示装置的结构示意图；
图2为本公开实施例显示装置的工作方法的流程示意图；
图3为本公开实施例检测空间轮廓的示意图；
图4和图5为本公开实施例显示屏的示意图；
图6为本公开实施例显示装置的工作流程示意图；
图7为本公开实施例显示装置的截面示意图；
图8为本公开实施例声波接收结构的示意图；
图9为本公开实施例声场分区的示意图。
附图标记
11 声学扫描模块
12 观众位置检测模块
121 红外相机
13 控制模块
14 发声驱动模块
15 显示屏
151 子显示屏
111 声波发射结构
16 声波的传输路径
17 封框胶
18 容纳腔
19 硬质基板
21 第一电极
22 压电材料
23 第二电极
具体实施方式
为使本公开的实施例要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
本公开的实施例提供一种显示装置及其工作方法，能够提升屏幕发生的音效，改善用户体验。
本公开的实施例提供一种显示装置，包括显示屏和发声驱动模块14，如图1所示，还包括：
设置在所述显示屏的非显示侧的声学扫描模块11，被配置为通过声波扫描，确定所述显示装置所处空间的空间轮廓；
观众位置检测模块12，被配置为检测所述显示装置所处空间中的观众坐标；
控制模块13，被配置为根据所述空间轮廓和所述观众坐标控制所述发声驱动模块发声。
本实施例中，通过声波扫描确定显示装置所处空间的空间轮廓，并检测显示装置所处空间中的观众坐标，根据空间轮廓和观众坐标可以确定在观众坐标处的最优声场，进而可以根据最优声场确定待输出的音频信号，并根据得到的音频信号控制发声驱动模块发声，从而能够实时在观众坐标处构建最优声场，提升屏幕发生的音效，改善用户体验。
一些实施例中，所述控制模块13具体被配置为根据所述观众坐标和所述空间轮廓确定在所述观众坐标处得到最优声场所对应的音频信号的功率及相位值，根据所得到的音频信号的功率及相位值控制所述发声驱动模块14发声。
相关技术中，只是通过发声驱动模块14驱动显示屏振动发声，而不区分显示屏所处场景，这样不能保证每个观众的用户体验；本实施例中，检测显 示装置所处空间的空间轮廓以及观众坐标，根据空间轮廓以及观众坐标调整音频信号的功率及相位值，能提升观众的用户体验。
其中，发声驱动模块14可以是振动激励器或者其他驱动能量获得机械振动的装置，上述驱动能量可以是电动、电磁或压电等。发声驱动模块14可以根据控制模块13发送的音频信号来驱动显示屏振动产生对应声波。振动激励器驱动显示屏能够产生较大的位移和冲击力，发声效果较好。
当然，本实施例的发声方式并不局限于显示屏振动发声，显示装置还可以包括独立的扬声器组件，发声驱动模块14驱动扬声器组件进行发声。
本实施例的显示装置还可以包括第一固定装置和第二固定装置，第一固定装置被配置为发声驱动模块14与显示装置的背板的固定，第二固定装置被配置为发声驱动模块14与显示屏的固定；实际使用中，第一固定装置通常采用发声驱动模块的外壳与固定座连接后用螺丝固定在背板上，第二固定装置通常采用胶条制成，通过上述固定装置将发声驱动模块14有效的固定，使音频信号在传输过程中，能量消耗较小。
一些实施例中，所述发声驱动模块14包括第一发声驱动模块和第二发声驱动模块，所述第一发声驱动模块与音频信号左声道连接，设置于所述显示屏非显示侧的右侧，所述第二发声驱动模块与音频信号右声道连接，设置于所述显示屏非显示侧的左侧，所述第一发声驱动模块和所述第二发声驱动模块被配置为根据所述控制模块13输出的音频信号驱动所述显示屏振动产生对应声波，声波合并产生声场。两个发声驱动模块的成本较低，并且通过连接控制模块13的音频信号左右声道即可实现声场与画面同步定位，制作过程简便。
当然，本实施例的技术方案中，发声驱动模块14并不局限于包括第一发声驱动模块和第二发声驱动模块，还可以包括更多个发声驱动模块，不仅仅以左右声道分区，可以以左中右声道分区或者包括更多声道分区，每个声道可以由多个发声驱动模块构成，多声道配合可构建环绕立体声场。
在观众位置检测模块12确定观众坐标后，可以根据观众坐标和空间轮廓设计每个声道分区的发声驱动模块的发声参数，比如功率、发声方向等。
本实施例中，通过声波扫描确定显示装置所处空间的空间轮廓，一些实施例中，所述声学扫描模块11包括设置在所述显示屏的非显示侧的声波发射结构和声波接收结构，所述声波发射结构被配置为发出超声波，所述声波接收结构被配置为接收被所述显示装置周围障碍物反射回的超声波，根据接收到的超声波确定所述显示装置所处空间的空间轮廓。其中，声波接收结构可以采用压电传感器，通过在显示装置内部集成多个压电传感器，可以构成显示装置所处空间全方位覆盖的辐射声场，利用空间内不同界面的吸声系数以及反射角度不同，可通过遇障碍物反射的回波信号携带的空间信息确定所述显示装置所处空间的空间轮廓。
一些实施例中，观众位置检测模块12采用设置在所述显示屏边缘的红外相机，通过红外相机可以对观众进行捕捉，确定观众的坐标。当然，观众位置检测模块12并不局限为采用红外相机，还可以为普通的可见光相机，但是采用红外相机在黑暗环境下也能对观众进行捕捉，确定观众的坐标。
其中，红外相机的数量可以为1个也可以为多个，为了保证检测的精度，红外相机的数量与显示屏的尺寸成正比。在红外相机的数量为多个时，每一红外相机被配置为获取预定区域的图像。具体地，红外相机可以被配置为从预定区域的图像中识别出观众面部信息，控制模块被配置为根据识别出的观众面部信息，计算观众的位置信息。
上述方案中，从预定区域的图像中识别出观众面部信息可以包括：识别出观众的面部图像在预定区域的图像中的相对位置，据此可以计算出观众的位置信息。人的面部图像的有效特征多，故面部识别易于实现。而且，人和人的面部图像差别较大，故通过面部识别区分不同观众的计算过程易于实现。
进一步而言，识别出的观众的面部图像所在的位置，也即观众耳朵所在的位置，因此，采用面部识别的方式既可以说是定位观众的位置信息，也可以说是定位观众耳朵所在位置，能够更加精准地实现精准定位发声。
图2为本公开实施例显示装置的工作方法的流程示意图，如图2所示，显示装置的工作方法包括：
步骤101：通过声波扫描，确定所述显示装置所处空间的空间轮廓；
步骤102：检测所述显示装置所处空间中的观众坐标；
步骤103：根据所述空间轮廓和所述观众坐标控制所述发声驱动模块发声。
当显示装置被激活功能后(可以通过用户的操作手动激活)，显示装置的声波发射结构启动并发出中低频超声波，超声波是声波的一部分，是人耳听不见、频率高于20KHZ的声波，由于频率高于30KHz的声波在空气中传播的损耗比较大，因此，声波发射结构发出的超声波的频率可以小于30KHz。声波发射结构发出的超声波的具体频率取决于显示装置的尺寸以及空间环境的大小，声波发射结构会向空间内的各个方向无指向性的辐射声波，可以根据不同反射边界处声波具有不同的反射角及反射率这一特性来分析声波接收结构接收到的反射回的声波。控制模块通过对声波接收结构接收到的各方位的回波进行逆时变换可以反演出空间内的边界情况，图3为空间声场的构建原理，如图3所示，在显示屏15的非显示侧设置有声波发射结构111和声波接收结构(未图示)，声波发射结构111向空间内的各个方向无指向性的辐射声波，声波被障碍物A、B反射回显示屏，其中，16表示声波的传播路径，声波接收结构能够对反射回的声波进行接收，控制模块对声波接收结构接收到的声波进行分析，进而构建出显示装置所处空间的空间轮廓，包括但不限于显示装置所处房间的大小、房间内的障碍物分布等。
为了实现显示装置所处空间的空间轮廓的构建，如图4和图5所示，可以在显示屏15的虚线框所示区域设置声波发射结构111和声波接收结构，其中，对于大尺寸的显示屏15来说，显示屏15可以由多个拼接的子显示屏151组成，所述子显示屏为LED显示屏或OLED显示屏。
声波发射结构111和声波接收结构均位于显示屏的非显示侧，声波发射结构111需要与声波接收结构间隔一定距离；声波发射结构111可以位于显示屏15的中心区域(即中间的虚线框所示区域)，声波接收结构可以均匀分布在所述显示屏的非显示侧，具体地，可以分布在显示屏15的所有虚线框所示区域，声波接收结构可以分区接收经反射后的声波信号，控制模块可以根据声波接收结构接收到的声波信号反演出各自区域内的声场情况。
为了减少声波发射结构111与声波接收结构间的相互干扰，声波接收结构需要在声波发射结构111发射完声波后开启，声波发射结构111在完成声波发射后可转为声波接收结构，即声波发射结构111复用为所述声波接收结构，声波发射结构111可接收显示屏15正对方向处的反射回的声波。一些实施例中，所述声波接收结构可以在所述声波发射结构发出超声波N秒后开启，N＝2d/340，d为所述显示装置与所处空间中最近的障碍物之间的距离，单位为米。
如图4所示，一具体实施例中，在显示屏15由16个子显示屏151组成时，可以在显示屏15的中心区域设置声波发射结构111，在周边的四个虚线框对应区域内设置声波接收结构，另外，声波发射结构111也可以复用为声波接收结构。
声波接收结构的数量与显示屏15的尺寸成正比，显示屏15的尺寸越大，设置的声波接收结构的数量越多，这样可以充分接收显示装置所处空间反射回的声波，提高构建的空间轮廓的准确度。
如图5所示，在显示屏15由49个子显示屏151组成时，需要增加设置的声波接收结构的数量，可以在显示屏15的中心区域设置声波发射结构111，在周边的八个虚线框对应区域内设置声波接收结构，另外，声波发射结构111也可以复用为声波接收结构。
在利用声波发射结构111和声波接收结构确定显示装置所处空间的空间轮廓后，可以利用红外相机来捕捉观众在空间中的位置，使用控制模块13调整观众位置为最佳混响以及最优声场处，并将最佳混响以及最优声场处对应的音频信号传递给发声驱动模块14，发声驱动模块14收到音频信号后，驱动显示屏发声，在不同区域形成不同频率和响度的声音，以达到听者的最优观感。本实施例的技术方案的发声方式不局限于显示屏振动发声，还可以另外设置有扬声器组件，通过发声驱动模块14驱动扬声器组件进行发声，扬声器组件与发声驱动模块14连接。
如图6所示，本实施例的显示装置的工作流程为：控制模块激活声波发射结构111，声波发射结构111发射声波信号，声波遇障碍物后各方向回波， 声波接收结构接收反射回的声波信号，将声波信号发送给控制模块，控制模块可以根据声波接收结构接收到的声波信号构建显示装置的所处空间；同时，红外相机检测空间内观众的位置，控制模块根据显示装置的所处空间和观众的位置调整观众位置为最佳混响以及最优声场处，并将最佳混响以及最优声场处对应的音频信号传递给发声驱动模块。
如图7所示为本实施例的显示装置的截面示意图，如图7所示，显示装置包括设置在所述显示屏15的非显示侧的硬质基板19，所述硬质基板19与所述显示屏15可以通过封框胶17封装在一起，所述硬质基板19与所述显示屏15之间间隔一定距离以在所述硬质基板19与所述显示屏15之间形成容纳腔18，所述声波发射结构和声波接收结构可以设置在所述容纳腔18内，容纳腔18可以对声波发射结构和声波接收结构进行保护。在显示屏15的边缘区域可以设置红外相机121。
为了达到较高的声传输效率，声波发射结构和声波接收结构与显示屏15之间可以使用胶或透声性能较好的介质贴合。具体地，声波接收结构可以采用压电传感器，如图8所示，声波接收结构包括第一电极21、第二电极23和位于所述第一电极21与所述第二电极23之间的压电材料22。
压电材料22以及显示屏的衬底基板的选择与显示屏的尺寸以及环境相关，压电材料22可以使用压电陶瓷以及压电薄膜等，显示屏的衬底基板可以使用硅基板、石英基板或玻璃基板等，但需要考虑压电材料结合屏幕后的声压特性是否可以达到工作要求。当显示屏的尺寸较大时，压电材料22可以采用压电陶瓷即产生较大的振动，同时显示屏的衬底基板选择玻璃基板；当显示屏的尺寸较小时，压电材料22可以选择压电薄膜材料并且可适当改变显示屏的衬底基板的材料。
一具体示例中，在显示屏为LED显示屏时，压电材料22可以使用一片或多片极化方向不同的压电片堆叠，不同极化方向可与输入的正负电压配合。
声波发射结构与声波接收结构的结构大致相同，但根据不同的性能要求，声波发射结构与声波接收结构的压电材料配比、尺寸、工作频率有所不同。相比声波发射结构，声波接收结构需要选择的压电材料尺寸更小，需要工作 处于高频状态以至于具有较大范围的接收灵敏度。
本实施例的技术方案可以在现有显示器发声器件的基础上提高立体声效果，减少大空间内声音的混响作用。本实施例的应用场景不局限于显示声场构建，也可应被配置为室内设计以及体感AI游戏等。
在控制模块模拟出整个空间的最优声场后，可以分区控制发声，使观众位置处有最佳音效。一具体示例中，如图9所示，可以将显示屏所处空间大致分成三个区域C、D和E。例如，当红外相机检测到人所处位置为D区域时，可以结合声场模拟情况，控制模块输出音频信号至发声驱动模块在D区域形成直达音频，而在其余两个区域C和E可以构建环境声，以此使声音更丰富并达到立体声。另外，当环境声场要求较低时，还可以仅控制对应区域的显示屏或者扬声器发声，这样可以减少耗能。比如当红外相机检测到人所处位置为D区域时，可以控制仅对应区域D的子显示屏或者扬声器发声，对应区域C和E的子显示屏或者扬声器不发声，这样可以减少显示装置的耗能。
本实施例中，通过声波扫描确定显示装置所处空间的空间轮廓，并检测显示装置所处空间中的观众坐标，根据空间轮廓和观众坐标可以确定在观众坐标处的最优声场，进而可以根据最优声场确定待输出的音频信号，并根据得到的音频信号控制发声驱动模块发声，从而能够实时在观众坐标处构建最优声场，提升屏幕发生的音效，改善用户体验。
本实施例的显示装置包括但不限于：射频单元、网络模块、音频输出单元、输入单元、传感器、显示单元、用户输入单元、接口单元、存储器、处理器、以及电源等部件。本领域技术人员可以理解，上述显示装置的结构并不构成对显示装置的限定，显示装置可以包括上述更多或更少的部件，或者组合某些部件，或者不同的部件布置。
所述显示装置可以为：电视、显示器、数码相框等任何具有显示功能的产品或部件，其中，所述显示装置还包括柔性电路板、印刷电路板和背板。
在本公开各方法实施例中，所述各步骤的序号并不能被配置为限定各步骤的先后顺序，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，对各步骤的先后变化也在本公开的保护范围之内。
需要说明，本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于实施例而言，由于其基本相似于产品实施例，所以描述得比较简单，相关之处参见产品实施例的部分说明即可。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅被配置为表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。
在上述实施方式的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (14)

  1. 一种显示装置，其特征在于，包括显示屏和发声驱动模块，还包括：
    设置在所述显示屏的非显示侧的声学扫描模块，被配置为通过声波扫描，确定所述显示装置所处空间的空间轮廓；
    观众位置检测模块，被配置为检测所述显示装置所处空间中的观众坐标；
    控制模块，被配置为根据所述空间轮廓和所述观众坐标控制所述发声驱动模块发声。
  2. 根据权利要求1所述的显示装置，其特征在于，
    所述控制模块具体被配置为根据所述观众坐标和所述空间轮廓确定在所述观众坐标处得到最优声场所对应的音频信号的功率及相位值，根据所得到的音频信号的功率及相位值控制所述发声驱动模块发声。
  3. 根据权利要求2所述的显示装置，其特征在于，
    所述发声驱动模块包括第一发声驱动模块和第二发声驱动模块，所述第一发声驱动模块与音频信号左声道连接，设置于所述显示屏非显示侧的右侧，所述第二发声驱动模块与音频信号右声道连接，设置于所述显示屏非显示侧的左侧，所述第一发声驱动模块和所述第二发声驱动模块被配置为根据所述控制模块输出的音频信号驱动所述显示屏振动产生对应声波，声波合并产生声场。
  4. 根据权利要求1所述的显示装置，其特征在于，所述观众位置检测模块采用设置在所述显示屏边缘的红外相机。
  5. 根据权利要求1所述的显示装置，其特征在于，所述声学扫描模块包括设置在所述显示屏的非显示侧的声波发射结构和声波接收结构，所述声波发射结构被配置为发出超声波，所述声波接收结构被配置为接收被所述显示装置周围障碍物反射回的超声波，根据接收到的超声波确定所述显示装置所处空间的空间轮廓。
  6. 根据权利要求5所述的显示装置，其特征在于，所述超声波的频率小于30KHz。
  7. 根据权利要求5所述的显示装置，其特征在于，所述显示装置包括设置在所述显示屏的非显示侧的硬质基板，所述硬质基板与所述显示屏封装在一起，所述硬质基板与所述显示屏之间间隔一定距离以在所述硬质基板与所述显示屏之间形成容纳腔，所述声波发射结构和声波接收结构设置在所述容纳腔内。
  8. 根据权利要求5所述的显示装置，其特征在于，所述声波接收结构包括第一电极、第二电极和位于所述第一电极与所述第二电极之间的压电材料。
  9. 根据权利要求8所述的显示装置，其特征在于，所述压电材料采用压电陶瓷或压电薄膜。
  10. 根据权利要求5所述的显示装置，其特征在于，所述声波发射结构复用为所述声波接收结构。
  11. 根据权利要求5所述的显示装置，其特征在于，所述声波发射结构对应所述显示屏的中心区域设置，所述声波接收结构均匀分布在所述显示屏的非显示侧。
  12. 根据权利要求5所述的显示装置，其特征在于，所述声波接收结构被配置为在所述声波发射结构发出超声波N秒后开启，N＝2d/340，d为所述显示装置与所处空间中最近的障碍物之间的距离，单位为米。
  13. 根据权利要求1所述的显示装置，其特征在于，所述显示屏由多个拼接的子显示屏组成，所述子显示屏为LED显示屏或OLED显示屏。
  14. 一种显示装置的工作方法，其特征在于，应被配置为如权利要求1-13中任一项所述的显示装置，所述工作方法包括：
    通过声波扫描，确定所述显示装置所处空间的空间轮廓；
    检测所述显示装置所处空间中的观众坐标；
    根据所述空间轮廓和所述观众坐标控制所述发声驱动模块发声。
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