Interaction panel

Abstract

The utility model discloses an interactive panel. The interactive panel comprises a panel main body and a sound production structure, the sound production structure is arranged on the panel body and comprises a plurality of sound production units distributed on the same layer, the sound production units are used for emitting first ultrasonic waves and second ultrasonic waves when receiving sound production signals, the frequency of the first ultrasonic waves is f1, the frequency of the second ultrasonic waves is f2, f1 and f2 are not equal, and the absolute value of f1-f2 is larger than or equal to 20 Hz and smaller than or equal to 20000 Hz. A user can hear sound with good directivity at the position corresponding to the sound production unit, so that the user can hear stronger sound signals.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an interactive panel. Background Art

[0002] The interactive panel with a speaker installed in the screen can play sounds as a speaker while displaying the picture, giving users a better experience.

[0003] However, in the related art, when the interactive panel makes a sound, the sound usually spreads to the surroundings with the speaker as the center, and the directionality of the sound is poor, resulting in a weak sound signal heard by the user. Utility Model Content

[0004] The present application provides an interactive panel, and a user can hear sound with good directionality at a position corresponding to a sound-emitting unit, so that the user can hear a stronger sound signal.

[0005] Specifically, the present application provides an interactive panel, including: a panel body; a sound-emitting structure, arranged on the panel body, the sound-emitting structure including a plurality of sound-emitting units distributed in the same layer, the sound-emitting unit being used to emit a first ultrasonic wave and a second ultrasonic wave when receiving a sound signal, the frequency of the first ultrasonic wave is f1, the frequency of the second ultrasonic wave is f2, f1 and f2 are not equal, and 20 Hz ≤ |f1-f2 | ≤20000 Hz.

[0006] In some embodiments of the present application, a plurality of the sound generating units are distributed in an array, which makes it more convenient to arrange the sound generating units, and smaller generating units can be used to enable more areas on the interactive panel to have the sound generating function.

[0007] In some embodiments of the present application, the panel body has a display area comprising a plurality of display subareas arranged in an array, each of which is provided with at least one corresponding sound unit. This allows different participants to speak through the sound units in the area corresponding to their avatars, making the interaction between participants more realistic.

[0008] In some embodiments of the present application, the area where the sound-emitting structure is located covers the display area, thereby increasing the sound-emitting area of ​​the interactive panel and making the entire display area of ​​the interactive panel have a sound-emitting function.

[0009] In some embodiments of the present application, the panel body includes: a display screen; and a backlight module located on the back side of the display screen. The sound-emitting structure is located between the display screen and the backlight module, or is located within the display screen, or is located on the light-emitting side of the display screen. Integrating the sound-emitting structure into the panel body can provide protection for the sound-emitting structure.

[0010] In some embodiments of the present application, the sound-emitting unit includes: a transparent substrate; a transparent vibrating membrane, which is arranged opposite to the transparent substrate, and the transparent vibrating membrane and the transparent substrate are spaced apart along the thickness direction of the interactive panel; a first transparent electrode, which is arranged on the side of the transparent substrate facing the transparent vibrating membrane; and a second transparent electrode, which is arranged on the side of the transparent vibrating membrane facing the transparent substrate and opposite to the first transparent electrode; wherein, when the first and second transparent electrodes are energized, the second transparent electrode drives the transparent vibrating membrane to vibrate under the drive of the first transparent electrode, thereby emitting the first ultrasonic wave and the second ultrasonic wave. When the first and second transparent electrodes are energized, a voltage difference is formed between the first and second transparent electrodes. When an alternating voltage is applied to the first transparent electrode, the voltage difference between the first and second transparent electrodes changes. As the voltage changes, the second transparent electrode drives the transparent vibrating membrane to continuously deform and vibrate to produce sound, thereby emitting the first and second ultrasonic waves.

[0011] In some embodiments of the present application, the sound-emitting unit further includes a light-transmitting insulating layer located between the first light-transmitting electrode and the second light-transmitting electrode. The light-transmitting insulating layer can separate the first light-transmitting electrode from the second light-transmitting electrode to prevent the first light-transmitting electrode from contacting the second light-transmitting electrode and causing a short circuit.

[0012] In some embodiments of the present application, the first light-transmitting electrode and the second light-transmitting electrode are both indium tin oxide electrodes, so that the first light-transmitting electrode and the second light-transmitting electrode have good light transmittance and electrical conductivity.

[0013] In some embodiments of the present application, the light-transmitting substrate is a glass substrate, and the light-transmitting diaphragm is a glass diaphragm, so that the light-transmitting substrate and the light-transmitting diaphragm have strong light-transmitting performance and sufficient structural strength.

[0014] In some embodiments of the present application, the thickness of the light-transmitting diaphragm is less than 55 micrometers to avoid the light-transmitting diaphragm being too thick and causing the light-transmitting diaphragm to be difficult to deform.

[0015] The beneficial effects of the present application are as follows: the first ultrasonic wave and the second ultrasonic wave emitted by the sound-emitting unit have good directivity and can propagate directionally in the air, and the first ultrasonic wave and the second ultrasonic wave will interact and self-demodulate during the propagation process to generate a sum frequency sound wave with a frequency of f1+f2 and a difference frequency sound wave with a frequency of f1-f2. Since |f1-f2| (the absolute value of f1 and f2) is in the range of 20 Hz to 20,000 Hz, the difference frequency sound wave generated by the first ultrasonic wave and the second ultrasonic wave belongs to the sound frequency that can be heard by the human ear. Therefore, when the user uses the interactive panel, the user can hear the sound with good directivity at the position corresponding to the sound-emitting unit, so that the user can hear a stronger sound signal. In addition, in the present application, a plurality of sound-emitting units are provided, and the plurality of sound-emitting units are distributed on the same layer, so that when using the interactive panel, more areas can correspond to the sound-emitting units, so that the user can hear a stronger sound signal in different areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic diagram of an interactive panel in a first perspective according to an embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the sound generation unit in one embodiment of the present application;

[0019] Figure 3 This is a structural diagram of the interactive panel in a second perspective in one embodiment of the present application.

[0020] Reference numerals:

[0021] 10. Panel body; 11. Display area; 111. Display partition; 12. Display screen; 13. Backlight module; 20. Sound-generating structure; 21. Sound-generating unit; 211. Transparent substrate; 212. Transparent vibration membrane; 213. First transparent electrode; 214. Second transparent electrode; 215. Controller; 216. Transparent insulating layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0023] The interactive panel with a speaker installed in the screen can play sounds as a speaker while displaying the picture, giving users a better experience. For example, when using the interactive panel for an online meeting, the sound of the speaker can be emitted through the health device on the interactive panel, and the participants can view the meeting documents and other information shared by the speaker through the interactive panel.

[0024] However, in related technologies, when the interactive panel makes a sound, the sound emitted by the speaker is usually a low-frequency sound wave that can be heard by the human ear. The directionality of the low-frequency sound wave is poor, and the low-frequency sound wave usually propagates around with the speaker as the center, which causes the sound heard by the user to be weaker.

[0025] Based on the above problems, the present application provides an interactive panel to solve the above problems. It should be noted that the interactive panel in the present application can be an electronic device such as a watch, a mobile phone, a PAD, a laptop, a notebook computer, a television, an electronic teaching whiteboard or a blackboard.

[0026] Specifically, if Figure 1 and Figure 2 As shown, the interactive panel includes a panel body 10 and a sound-generating structure 20 .

[0027] Among them, the sound-emitting structure 20 is arranged on the panel body 10, and the sound-emitting structure 20 includes a plurality of sound-emitting units 21 distributed on the same layer. The same-layer distribution means that the plurality of light-emitting units 21 are located on the same layer and are arranged side by side; the sound-emitting unit 21 is used to emit a first ultrasonic wave and a second ultrasonic wave when receiving a sound signal. The frequency of the first ultrasonic wave is f1, and the frequency of the second ultrasonic wave is f2. f1 and f2 are not equal, and 20 Hz ≤ |f1-f2 | ≤20000 Hz. The specific values ​​of f1 and f2 can be selected according to actual needs, and this application does not impose specific restrictions.

[0028] It is understood that the sound signal refers to the electrical signal converted by a device that can receive sound, such as a microphone, after receiving the sound signal. After receiving the sound signal, the sound unit 21 converts the sound signal into a corresponding sound wave signal and emits a first ultrasonic wave and a second ultrasonic wave. The sound frequency range that the human ear can hear is 20 Hz to 20,000 Hz. Ultrasonic waves are sound waves with a frequency higher than 20,000 Hz, that is, f1 and f2 are both greater than 20,000 Hz. It is known to those skilled in the art that the higher the frequency of the sound wave, the better the directionality of the sound wave during propagation. Therefore, ultrasonic waves with a frequency greater than 20,000 Hz have good directionality during transmission.

[0029] It should also be noted that, in the process of ultrasonic waves of different frequencies propagating in the air, due to the nonlinear acoustic effect of the air, ultrasonic waves of different frequencies will interact and self-demodulate in the air, generating new sound waves with a frequency equal to the sum of the original ultrasonic frequencies and the difference between the frequencies. In the present application, the first ultrasonic wave and the second ultrasonic wave emitted by the sound-emitting unit 21 have good directivity and can propagate directionally in the air. In addition, the first ultrasonic wave and the second ultrasonic wave will interact and self-demodulate during the propagation process, generating a sum-frequency sound wave with a frequency of f1+f2 and a difference-frequency sound wave with a frequency of f1-f2. Since |f1-f2| (The absolute values ​​of f1 and f2) are in the range of 20 Hz to 20,000 Hz, and the difference frequency sound waves generated by the first ultrasonic wave and the second ultrasonic wave belong to the sound frequency that can be heard by the human ear. Therefore, when the user uses the interactive panel, the user can hear the sound with good directionality at the position corresponding to the sound unit 21, so that the user can hear a stronger sound signal; in addition, in the present application, there are multiple sound units 21, and multiple sound units 21 are distributed in the same layer, so that when using the interactive panel, more areas can correspond to the sound units 21, so that the user can hear a stronger sound signal in different areas.

[0030] Continue to see Figure 1 As shown, in one embodiment of the present application, multiple sound units 21 are distributed in an array. It is understood that array distribution means orderly arrangement, such as equidistant arrangement. Distributing the sound units 21 in an array makes it more convenient to arrange the sound units, and smaller sound generating units can be used to enable more areas on the interactive panel to have sound functions. It also facilitates the wiring connection between the sound units 21 and devices such as the control module (such as the control panel) in the panel body 10. The control module can control the operation of the sound units 21.

[0031] Continue to see Figure 1 As shown, in one embodiment of the present application, the panel body 10 has a display area 11, which includes a plurality of display partitions 111 distributed in an array. Each display partition 111 is provided with at least one corresponding sound unit 21. It is understood that the display area 11 can display images. When using the interactive panel for a multi-person meeting, the avatars of different speakers can be displayed in each display partition 111. Each display partition 111 is provided with at least one sound unit 21. When different participants speak, they can use the sound unit 21 in the area corresponding to the avatar to make the interaction between the participants more realistic.

[0032] Furthermore, the area where the sound-emitting structure 20 is located covers the display area 11, thereby increasing the sound-emitting area of ​​the interactive panel and enabling the entire display area 11 of the interactive panel to have a sound-emitting function. It should also be noted that when the panel body 10 also has a non-display area 11, the area where the sound-emitting structure 20 is located can also cover the non-display area 11; when the panel body 10 is a full-display panel, that is, the panel body 10 does not have a non-display area 11, the area where the sound-emitting structure 20 is located can completely overlap with the display area 11.

[0033] like Figure 3 As shown, in some embodiments of the present application, the panel body 10 includes a display screen 12 and a backlight module 13; the display screen 12 is a device used for display in the interactive panel, and the display screen 12 can be a display screen such as LCD, OLED, QLED, Mini LED or Micro LED; the backlight module 13 is located on the back side of the display screen 12, and the backlight module 13 is used to provide a display light source for the display screen 12, and the back side of the display screen 12 refers to the side opposite to the display surface of the display screen 12; the backlight module 13 can be a direct-type backlight module or an edge-type backlight module, and the type of the backlight module 13 can be selected according to actual needs.

[0034] In one embodiment, the sound-emitting structure 20 can be located between the display screen 12 and the backlight module 13, so that the sound-emitting structure 20 can be hidden in the interactive panel, which can provide protection for the sound-emitting structure 20; in another embodiment, the sound-emitting structure 20 can be located in the display screen 12, that is, the sound-emitting structure 20 is integrated in the display screen 12, for example, the sound-emitting structure 20 can be arranged on the inner side of the cover plate of the display screen 12, which can also provide protection for the sound-emitting structure 20; in another embodiment, the sound-emitting structure 20 can be located on the light-emitting side of the display screen 12, and the light-emitting side of the display screen 12 refers to the side of the display screen 12 on which the display surface is provided, which can make the arrangement of the sound-emitting structure 20 more convenient.

[0035] Specifically, see Figure 3 As shown, the sound unit 21 includes a transparent substrate 211, a transparent vibration membrane 212, a first transparent electrode 213 and a second transparent electrode 214; the transparent vibration membrane 212 is arranged opposite to the transparent substrate 211, and the transparent vibration membrane 212 and the transparent substrate 211 are arranged at intervals along the thickness direction of the interactive panel; the first transparent electrode 213 is arranged on the side of the transparent substrate 211 facing the transparent vibration membrane 212; the second transparent electrode 214 is arranged on the side of the transparent vibration membrane 212 facing the transparent substrate 211, and is arranged opposite to the first transparent electrode 213.

[0036] When the first light-transmitting electrode 213 and the second light-transmitting electrode 214 are powered, the second light-transmitting electrode 214 drives the light-transmitting vibration membrane 212 to vibrate under the driving of the first light-transmitting electrode 213 , thereby emitting the first ultrasonic wave and the second ultrasonic wave.

[0037] It is understood that the sound-generating unit 21 is a piezoelectric speaker, and the transparent vibrating membrane 212 is the portion of the sound-generating unit 21 that vibrates and produces sound. When the first and second transparent electrodes 213 and 214 are energized, a voltage difference is formed between the first and second transparent electrodes 213 and 214. When an alternating voltage is applied to the first transparent electrode 213, the voltage difference between the first and second transparent electrodes 213 and 214 changes. As the voltage changes, the second transparent electrode 214 drives the transparent vibrating membrane 212 to continuously deform and vibrate, producing sound, thereby emitting the first and second ultrasonic waves. It should also be noted that the transparent substrate 211, the transparent vibrating membrane 212, the first and second transparent electrodes 213 and 214 are all made of a transparent material, so that light emitted by the backlight module 13 can pass through the transparent substrate 211, the transparent vibrating membrane 212, the first and second transparent electrodes 213 and 214, thereby preventing the transparent substrate 211 from affecting the normal display of the display screen 12.

[0038] Furthermore, the sound unit 21 may also include a controller 215, which is electrically connected to the first light-transmitting electrode 213 and the second light-transmitting electrode 214. The controller 215 is configured to receive a sound signal, convert the generated signal into a corresponding electrical signal, and provide the electrical signal to the first light-transmitting electrode 213 and the second light-transmitting electrode 214. It should be noted that the controller 215 can control the vibration of the light-transmitting vibrating membrane 212 by controlling the current flowing through the first light-transmitting electrode 213 and the second light-transmitting electrode 214. The controller 215 can be electrically connected to a control module in the panel body 10 to receive the sound signal sent by the control module.

[0039] It should also be noted that all the sound-emitting units 21 can share a light-transmitting substrate 211, or all the sound-emitting units 21 can have independent light-transmitting substrates 211 respectively, and this application does not impose any specific restrictions; the light-transmitting substrate 211 can be adhered to the display screen 12 or the backlight module 13 by optical glue, and the light-transmitting vibration membrane 212 and the display screen 12 and the backlight module 13 can be spaced apart so that there is space between the light-transmitting vibration membrane 212 and the display screen 12 and the backlight module 13 for the light-transmitting vibration membrane 212 to deform.

[0040] In one embodiment of the present application, the first light-transmitting electrode 213 and the second light-transmitting electrode 214 are both indium tin oxide electrodes. Indium tin oxide is a transparent conductive oxide with good light transmittance and conductivity, so that the first light-transmitting electrode 213 and the second light-transmitting electrode 214 have good light transmittance and conductivity.

[0041] In one embodiment of the present application, the transparent substrate 211 is a glass substrate, and the transparent diaphragm 212 is a glass diaphragm. It is understood that both the transparent substrate 211 and the transparent diaphragm 212 are made of glass, which provides them with strong light transmission and sufficient structural strength. The transparent diaphragm 212 can be ultra-thin flexible glass (UTG), which has good flexibility and can prevent the transparent diaphragm 212 from breaking due to vibration.

[0042] In one embodiment of the present application, the thickness of the light-transmitting diaphragm 212 is less than 55 microns to prevent the light-transmitting diaphragm 212 from being too thick and causing the light-transmitting diaphragm 212 to be difficult to deform. The thickness of the light-transmitting diaphragm 212 can be 50 microns, 45 microns, 40 microns, or other values.

[0043] In one embodiment of the present application, the thickness of the transparent substrate 211 can be 450 microns to 550 microns, so that the transparent substrate 211 has sufficient structural strength and can prevent the transparent substrate 211 from being too thick and affecting the transmittance of the transparent substrate 211. The thickness of the transparent substrate 211 can be 450 microns, 500 microns, 550 microns, or other values.

[0044] Continue to see Figure 3 As shown, in one embodiment of the present application, the sound unit 21 further includes a light-transmitting insulating layer 216. The light-transmitting insulating layer 216 is located between the first light-transmitting electrode 213 and the second light-transmitting electrode 214. The light-transmitting insulating layer 216 can separate the first light-transmitting electrode 213 from the second light-transmitting electrode 214 to prevent the first light-transmitting electrode 213 and the second light-transmitting electrode 214 from contacting and causing a short circuit. The light-transmitting insulating layer 216 can be made of light-transmitting glass, light-transmitting plastic, or other light-transmitting insulating materials.

[0045] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An interactive panel, characterized in that: include: A panel body (10); A sound-generating structure (20) is arranged on the panel body (10), the sound-generating structure (20) comprises a plurality of sound-generating units (21) distributed in the same layer, the sound-generating units (21) are used to emit a first ultrasonic wave and a second ultrasonic wave when receiving a sound-generating signal, the frequency of the first ultrasonic wave is f1, the frequency of the second ultrasonic wave is f2, f1 and f2 are not equal, and 20 Hz ≤ | f1-f2 | ≤ 20000 Hz.

2. The interactive panel according to claim 1, characterized in that: The plurality of sound generating units (21) are distributed in an array.

3. The interactive panel according to claim 1, characterized in that: The panel body (10) has a display area (11), the display area (11) comprises a plurality of display partitions (111) distributed in an array, and each of the display partitions (111) is provided with at least one corresponding sound generating unit (21).

4. The interactive panel according to claim 3, characterized in that: The area where the sound-generating structure (20) is located covers the display area (11).

5. The interactive panel according to claim 1, characterized in that: The panel body (10) comprises: Display screen (12); A backlight module (13) is located on the back side of the display screen (12); The sound-emitting structure (20) is located between the display screen (12) and the backlight module (13), or the sound-emitting structure (20) is located inside the display screen (12), or the sound-emitting structure (20) is located on the light-emitting side of the display screen (12).

6. The interactive panel according to claim 1, characterized in that: The sound generating unit (21) comprises: A light-transmitting substrate (211); A light-transmitting vibration film (212) is arranged opposite to the light-transmitting substrate (211), and the light-transmitting vibration film (212) and the light-transmitting substrate (211) are arranged at intervals along the thickness direction of the interactive panel; A first light-transmitting electrode (213) is arranged on a side of the light-transmitting substrate (211) facing the light-transmitting vibration membrane (212); A second light-transmitting electrode (214) is arranged on a side of the light-transmitting vibration film (212) facing the light-transmitting substrate (211), and is arranged opposite to the first light-transmitting electrode (213); When the first light-transmitting electrode (213) and the second light-transmitting electrode (214) are powered on, the second light-transmitting electrode (214) is driven by the first light-transmitting electrode (213) to drive the light-transmitting vibration membrane (212) to vibrate, thereby emitting the first ultrasonic wave and the second ultrasonic wave.

7. The interactive panel according to claim 6, characterized in that: The sound generating unit (21) further comprises: The light-transmitting insulating layer (216) is located between the first light-transmitting electrode (213) and the second light-transmitting electrode (214).

8. The interactive panel according to claim 6, characterized in that: The first light-transmitting electrode (213) and the second light-transmitting electrode (214) are both indium tin oxide electrodes.

9. The interactive panel according to claim 6, characterized in that: The light-transmitting substrate (211) is a glass substrate, and the light-transmitting vibration film (212) is a glass vibration film.

10. The interactive panel according to claim 6, characterized in that: The thickness of the light-transmitting vibration membrane (212) is less than 55 micrometers.

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