CN114679672B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN114679672B CN114679672B CN202011557305.4A CN202011557305A CN114679672B CN 114679672 B CN114679672 B CN 114679672B CN 202011557305 A CN202011557305 A CN 202011557305A CN 114679672 B CN114679672 B CN 114679672B
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- 239000000758 substrate Substances 0.000 claims abstract description 79
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 26
- 229910052782 aluminium Inorganic materials 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000005855 radiation Effects 0.000 description 6
- 230000002708 enhancing effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002096 quantum dot Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
-
- 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
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- 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
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The application discloses a display panel and a display device for improving low-frequency sound wave sound pressure level. The display panel provided by the application comprises: vibrating the substrate, displaying the module and a plurality of sounding units; the sound generating unit includes: at least one first sound generating unit, and at least one second sound generating unit; the first sound generating unit includes: a first frame forming a cavity with the vibration substrate, a first exciter positioned in the cavity and contacting the vibration substrate; the second sound generating unit includes: a second frame forming a cavity with the vibration substrate, a second exciter positioned in the cavity and contacting the vibration substrate; the frequency of the sound wave generated by the first exciter is greater than that of the sound wave generated by the second exciter; the display panel further includes: at least one sound guide tube corresponding to the second sound producing unit; the sound guide tube is provided with a sound inlet end and a sound outlet end, the sound inlet end is communicated with the cavity of the second sound generating unit, and the sound outlet end faces the vibration substrate.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
The ultra-thin, narrow bezel, and even full screen design of the display device leaves less and less room for the sound emitting device. While the conventional sound emitting device is large in size, the installation position is limited, and it is difficult to have a proper position and space in the new generation of display devices. Therefore, there is a need to redesign sound emitting devices that can accommodate the needs of current display devices.
At present, a display device which integrates an exciter in a Light-Emitting Diode (LED) display screen is presented, and the device uses the whole screen as a vibrating diaphragm to drive the exciter to vibrate so as to drive a screen plate to sound, so that the screen sound is realized. However, such devices for producing sound on a screen typically have the exciter enclosed in a housing, where the low frequency response of the sound producing screen is primarily dependent on the volume of the housing and the resonant frequency of the housing. If the resonant frequency of the tank is high, the overall operating frequency of the sound-emitting screen is driven to drift toward higher frequencies, which results in lower sound pressure levels at lower frequencies. In view of portability of the sound-emitting screen, the volume of the sound-emitting screen needs to be reduced, the volume of the box body is smaller, the resonance frequency of the box body is higher, and the sound pressure level of the sound-emitting screen at a low frequency is lower.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, which are used for improving the sound pressure level of low-frequency sound waves.
The embodiment of the application provides a display panel, the display panel includes: the display device comprises a vibration substrate, a display module and a plurality of sounding units, wherein the display module is positioned on one side of the vibration substrate;
the plurality of sound generating units include: at least one first sound generating unit, and at least one second sound generating unit;
the first sound generating unit includes: a first frame forming a cavity with the vibration substrate, a first exciter positioned in the cavity and contacted with the vibration substrate;
the second sound generating unit includes: a second frame forming a cavity with the vibration substrate, a second exciter positioned in the cavity and contacted with the vibration substrate;
the frequency of the sound wave generated by the first exciter is greater than the frequency of the sound wave generated by the second exciter;
the display panel further includes: at least sound guide tubes corresponding to the second sound producing units one by one;
each sound guide tube is provided with a sound inlet end and a sound outlet end, and the sound inlet end of each sound guide tube is communicated with the cavity of one second sound generating unit; and in the area outside the second sound producing unit, the sound producing end of the sound guide tube faces the vibration substrate.
In some embodiments, a distance between the sound emitting end and a plane where a surface of the vibration substrate on a side facing away from the display module is located is greater than or equal to 0.
In some embodiments, the orthographic projection of the sound emitting end of the sound guide tube 10 on the plane of the vibration substrate 1 is located outside the vibration substrate 1.
In some embodiments, the inner diameter of each of the sound guide tubes is the same at a different location.
In some embodiments, the total length h of the sound guide tube satisfies the following condition:
wherein l is the distance between the sound emitting end and the center of the sound wave generated by the second sound generating unit, n is a positive integer, lambda 0 Is the first preset frequency acoustic wavelength.
In some embodiments, the center of symmetry of the display panel falls within the area where all the second sound generating units are located;
the area where the first sound generating unit is located surrounds the area where the second sound generating unit is located.
In some embodiments, each of the sound guide tubes comprises: curved sub-sound guide tubes extending in a curved manner.
In some embodiments, each of the sound guide tubes comprises: a plurality of sub-sound guide tubes having different inner diameters; different sub-sound guide pipes are alternately connected.
In some embodiments, each of the sound guide tubes comprises at least: a plurality of first sub-sound guide tubes and a plurality of second sub-sound guide tubes alternately connected;
the inner diameter of the first sub-sound guide tube is larger than that of the second sub-sound guide tube.
In some embodiments, the first frame comprises: the first box body is contacted with the first aluminum frame;
the second frame includes: the second aluminum frame is bonded with the vibration substrate base plate through a glue material, and the second box body is in contact with the second aluminum frame;
the second box body is provided with a first sub box body opposite to the second exciter and a second sub box body connected with the second aluminum frame and the first sub box body; the second sub-box body is provided with a first opening penetrating through the thickness of the second sub-box body;
each of the sound guide pipes includes: a first portion located within the cavity of the second sound emitting unit, and a second portion connected to the second sub-tank through the first opening and extending beyond the second sound emitting unit;
the first portion includes an inlet end of the sound guide tube and the second portion includes an outlet end of the sound guide tube.
In some embodiments, the first frame comprises: the first box body is contacted with the first aluminum frame;
the second frame includes: the second aluminum frame is bonded with the vibration substrate base plate through a glue material, and the second box body is in contact with the second aluminum frame;
the second housing has a first sub-housing opposite the second actuator; the first sub-box body is provided with a second opening which penetrates through the thickness of the first sub-box body and is connected with the sound guide pipe;
the sound inlet end of each sound guide tube is connected with the first sub-box body through the second opening; and the rest part of the sound guide tube is positioned outside the second sound generating unit except the part connected with the first sub-box body.
In some embodiments, the inner diameter of the sound tube is greater than 1 centimeter.
In some embodiments, the material of the sound guide tube comprises one or a combination of the following: aluminum, plastic, rubber.
In some embodiments, the display panel includes a plurality of sub display panels;
each sub display panel corresponds to a first sounding unit or a second sounding unit.
The display device provided by the embodiment of the application comprises the display panel provided by the embodiment of the application.
The display panel and the display device provided by the embodiment of the application comprise a first sounding unit and a second sounding unit, wherein the first sounding unit comprises a first exciter, and the second sounding unit comprises a second exciter, so that the first exciter and the second exciter can be driven to vibrate the substrate of the vibration substrate, and screen sounding is achieved. The frequency of the sound wave generated by the first exciter is larger than that of the sound wave generated by the second exciter, namely the sound generating frequency of the sound generating unit is divided, so that the first exciter is driven to drive the vibration substrate to vibrate to generate medium-high frequency sound waves, and the second exciter is driven to drive the vibration substrate to vibrate to generate low frequency sound waves. And because the second frame of the second sound production unit is connected with the sound guide pipe, the other end of the sound guide pipe faces the vibration substrate, and a sound source at the back of the display panel is transmitted to the front of the display panel through the sound guide pipe and generates interference action with a source at the front of the display panel, thereby enhancing the forward sound radiation of low-frequency sound waves, improving the sound pressure level of the low-frequency sound waves and realizing the low-frequency submergence of the sound production display panel.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 3 is a diagram showing a far-field sound pressure level frequency response of a display panel according to an embodiment of the present disclosure and a related art display panel;
fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of an acoustic pipe in a display panel according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present application. And embodiments and features of embodiments in this application may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without the benefit of the present disclosure, are intended to be within the scope of the present application based on the described embodiments.
Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
It should be noted that the dimensions and shapes of the various figures in the drawings do not reflect true proportions, and are intended to illustrate the present application only. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
The embodiment of the application provides a display panel, as shown in fig. 1, the display panel includes: a vibration substrate 1, a display module 2 positioned at one side of the vibration substrate 1, and a plurality of sounding units 3 positioned at one side of the vibration substrate 1 away from the display module 2;
the plurality of sound generating units 3 include: at least one first sound generating unit 4, and at least one second sound generating unit 5;
the first sound generating unit 4 includes: a first frame 6 forming a cavity with the vibration substrate 1, a first actuator 7 located in the cavity and contacting the vibration substrate 1;
the second sound generating unit 5 includes: a second frame 8 forming a cavity with the vibration substrate 1, a second exciter 9 positioned in the cavity and contacting the vibration substrate 1;
the frequency of the sound wave generated by the first exciter 7 is greater than the frequency of the sound wave generated by the second exciter 9;
the display panel further includes: at least the sound guide tubes 10 corresponding to the second sound producing units 4 one by one;
each sound guide tube 10 is provided with a sound inlet end and a sound outlet end, and the sound inlet end of each sound guide tube 10 is communicated with the cavity of one second sound generating unit 5; in the region outside the second sound generating unit 5, the sound emitting end of the sound guide tube 10 faces the vibration substrate 1.
The display panel provided by the embodiment of the application comprises a first sounding unit and a second sounding unit, wherein the first sounding unit comprises a first exciter, and the second sounding unit comprises a second exciter, so that the first exciter and the second exciter are driven to vibrate the substrate, and screen sounding is achieved. The frequency of the sound wave generated by the first exciter is larger than that of the sound wave generated by the second exciter, namely the sound generating frequency of the sound generating unit is divided, so that the first exciter is driven to drive the vibration substrate to vibrate to generate medium-high frequency sound waves, and the second exciter is driven to drive the vibration substrate to vibrate to generate low frequency sound waves. And because the second frame of the second sound production unit is connected with the sound guide pipe, the other end of the sound guide pipe faces the vibration substrate, and a sound source at the back of the display panel is transmitted to the front of the display panel through the sound guide pipe and generates interference action with a source at the front of the display panel, thereby enhancing the forward sound radiation of low-frequency sound waves, improving the sound pressure level of the low-frequency sound waves and realizing the low-frequency submergence of the sound production display panel.
In some embodiments, a distance between the sound emitting end and a plane where a surface of the vibration substrate on a side facing away from the display module is located is greater than or equal to 0.
In some embodiments, as shown in fig. 1, in the area outside the sound generating unit, the sound generating end of the sound guiding tube 10 contacts with the side of the vibration substrate 1 away from the display module 2.
Alternatively, in some embodiments, as shown in fig. 2, in the area outside the sound generating unit, the orthographic projection of the sound emitting end of the sound guiding tube 10 on the plane of the vibration substrate 1 is located outside the vibration substrate 1. I.e. the sound outlet end of the sound guide tube is located in an area outside the vibration substrate.
In practical implementation, as shown in fig. 2, the plane of the sound emitting end of the sound guiding tube 10 and the surface of the vibration substrate 1 on the side facing away from the display module 2 are not in the same plane, that is, the sound emitting end of the sound guiding tube 10 is located on the side facing away from the display module 2 of the vibration substrate 1, and the distance between the plane of the sound emitting end of the sound guiding tube 10 and the surface of the vibration substrate 1 on the side facing away from the display module 2 is greater than 0.
In the implementation, the distance between the plane of the sound emitting end of the sound guide tube and the surface of the vibration substrate on the side deviating from the display module can be set according to actual needs.
Of course, in the implementation, when the sound emitting end of the sound guide tube is located in the area outside the vibration substrate, the plane where the sound emitting end of the sound guide tube 10 is located and the surface of the vibration substrate 1 on the side away from the display module 2 may be located in the same plane, that is, the distance between the sound emitting end and the plane where the surface of the vibration substrate on the side away from the display module is located is equal to 0.
In some embodiments, the frequency of the sound waves generated by the first exciter is greater than 200 hertz; the frequency range of the sound wave generated by the second exciter is 100-200 Hz.
In some embodiments, as shown in fig. 1 and 2, the inner diameter of each of the sound guide tubes 10 is the same at different positions.
In some embodiments, the total length h of the sound guide tube satisfies the following condition:
wherein l is the distance between the center of the sound emitting end of the sound guide tube and the center of the sound wave generated by the second sound generating unit, n is a positive integer, and lambda 0 Is the first preset frequency acoustic wavelength.
Therefore, the phase positions of the sound source of the second sound generating unit on the front face of the display panel and the sound source of the sound outlet end of the sound guide tube are the same, and accordingly low-frequency sound wave forward sound radiation is enhanced, and the sound pressure level of the low-frequency sound wave is improved.
In specific implementation, the frequency range of the sound wave with the first preset frequency is 100-200 Hz. I.e. the first preset frequency sound wave is in the frequency range of the sound wave generated by the second exciter.
It should be noted that the total length h of the sound guide tube is the total length of the central connecting line of the section of the sound guide tube. It should be noted that, taking fig. 1 as an example, the vibration substrate has a pair of edges parallel to the first direction X, and a distance between a center of an acoustic end of the sound guiding tube and a center of the second acoustic unit generating the acoustic wave, that is, a distance between the center of the acoustic end of the sound guiding tube and the center of the second acoustic unit generating the acoustic wave in the first direction X.
Next, a display panel without a sound guide tube and a display panel with a sound guide tube are simulated, so as to explain the improvement of the sound pressure level of the low-frequency sound wave by the display panel provided by the embodiment of the application. The far-field sound pressure level frequency response comparison of the display panel without the sound guide tube and the display panel with the sound guide tube is shown in fig. 3, and the lengths h of the sound guide tubes are respectively 0.35 m, 0.45m and 0.55m. With the sound pressure level of the low-frequency sound wave reaching 80 decibels (dB) as a standard, according to fig. 3, when the sound guide tube is not arranged, the sound pressure level of the sound wave is close to 200 hertz (Hz), but the sound pressure level of each display panel provided with the sound guide tube reaches 80dB, the far-field sound pressure level of each display panel reaches 80dB respectively, namely, the display panel provided with the sound guide tube can generate stronger sound pressure amplitude at lower sound wave frequency, thereby realizing frequency diving and expanding the working frequency band of low frequency.
Furthermore, as can be seen from fig. 3, the low frequency sound pressure level improvement achieved by the sound guide pipes of different lengths is different near the sound wave frequency of 100Hz, and the sound pressure level of the sound guide pipe reaches 80dB when the sound wave frequency is less than 100Hz when the length h of the sound guide pipe is 0.55m. Because the longer the sound guide tube length is, the larger the phase change of the sound wave is when the sound wave propagates in the sound guide tube, when the sound wave is radiated out from the sound guide tube, the in-phase of the sound wave radiated by the sound outlet end of the sound guide tube and the sound wave radiated by the front surface of the display panel can be realized more easily, and interference occurs. Thus, the longer the sound guide tube length, the more significant the sound pressure level increase.
In some embodiments, as shown in fig. 1, the sound guide tube includes a portion extending in the second direction Y and a portion extending in the first direction X. The second direction is perpendicular to the plane of the vibration substrate, and the first direction is parallel to the plane of the vibration substrate. In some embodiments, the symmetry axis of the vibration substrate base plate perpendicular to the first direction X passes through the second sound emitting unit, so that the total length of the sound guide tube can be increased as much as possible.
In some embodiments, the center of symmetry of the display panel falls within the area where all the second sound generating units are located;
the area where the first sound generating unit is located surrounds the area where the second sound generating unit is located.
In particular, in the case that the position of the second sound generating unit and the position of the sound emitting end of the sound guiding tube are determined, in order to increase the total length of the sound guiding tube, the sound guiding tube may include a curved extending portion.
In some embodiments, each of the sound guides comprises a curved sub-sound guide that extends in a curve.
In some embodiments, as shown in fig. 4, fig. 4 is a side view of a side of the sound guide tube away from the vibration substrate, where the third direction Z is parallel to another opposite side of the vibration substrate, and a plane in which the first direction X and the third direction Z are located is parallel to a plane in which the vibration substrate is located. As shown in fig. 4, the plane of the curved sound guide tube is parallel to the planes of the first direction X and the third direction Z. Because the sound guide tube comprises the bent sound guide tube, the total length of the sound guide tube can be further increased compared with the sound guide tube extending in a straight line, and the sound pressure level of the low-frequency sound wave can be further improved.
It should be noted that, fig. 4 is exemplified by the fact that the plane of the curved sub-sound guide tube is parallel to the planes of the first direction X and the third direction Z, and of course, in the implementation, the plane of the curved sub-sound guide tube is parallel to the planes of the first direction X and the second direction Y.
In some embodiments, each sound guide tube comprises: a plurality of sub-sound guide tubes having different inner diameters; different sub-sound guide pipes are alternately connected.
In the practical implementation, the size of the display panel and the size of the frame need to be considered, and the size of the display device including the display panel needs to be considered, so that the sound guide tube has a limited accommodating space, the sound guide tube has a limited manufacturing length, and the low-frequency sound wave sound pressure level improving effect is limited.
The display panel that this application embodiment provided, the sound guide pipe of internal diameter difference is connected in turn, and when the sound wave propagates when the sound guide pipe juncture of different diameters, acoustic impedance can change to lead to the sound wave phase place to change, can reach the phase shift equivalent effect with long sound guide pipe sound wave propagation. The sound guide tubes with different inner diameters are alternately connected, and the same phase of the sound source of the second sound generating unit on the front face of the display panel and the sound source of the sound outlet end of the sound guide tube can be realized, so that the low-frequency sound wave forward sound radiation is enhanced, the sound pressure level of the low-frequency sound wave is improved, and the limitation of the length of the sound guide tube on the improvement effect of the sound pressure level of the low-frequency sound wave is avoided.
In some embodiments, as shown in fig. 5 and 6, each of the sound guide tubes 10 includes at least: a plurality of first sub-sound guide pipes 17 and a plurality of second sub-sound guide pipes 18 alternately connected;
the inner diameter of the first sub-sound guide tube 17 is larger than the inner diameter of the second sub-sound guide tube 18.
In some embodiments, as shown in fig. 5 and 6, the second sub-sound guide 18 is connected to the second frame 8.
In the embodiment, taking an example that each sound guide tube includes two sub sound guide tubes with different inner diameters, the larger the ratio of the inner diameter of the first sub sound guide tube to the inner diameter of the second sub sound guide tube, the smaller the total length of each sound guide tube can be set. The inner diameter and the length of each sub-sound guide tube can be selected according to actual needs, for example, simulation can be carried out when the sound guide tube is designed, so that the sound guide tube for enhancing the forward sound radiation of the low-frequency sound wave and improving the sound pressure level of the low-frequency sound wave is obtained.
In some embodiments, as shown in fig. 1, 2, 5, 6, 7, 8, the first frame 6 includes: a first aluminum frame 11 bonded to the vibration substrate 1 through a paste (not shown), and a first case 12 in contact with the first aluminum frame 11;
the second frame 8 includes: a second aluminum frame 14 bonded to the vibration substrate base plate 1 through a glue (not shown), and a second case 15 in contact with the second aluminum frame 14;
the second casing 15 has a first sub-casing 21 opposed to the second actuator 9, and a second sub-casing 22 connecting the second aluminum frame 14 and the first sub-casing 21.
In some embodiments, as shown in fig. 1, 2, 5, and 6, the first sub-tank 21 has a second opening 16 through its thickness;
the sound inlet end of each sound guide tube 10 is connected with the first sub-box 21 through the second opening 16; and the rest of the sound guide tube 10 is located outside the second sound generating unit 5 except for the connection part with the first sub-housing 21.
So that the sound inlet end of the sound guide tube is communicated with the cavity through the second opening.
Alternatively, in some embodiments, each sound guide tube comprises: a portion located within the cavity of the second sound emitting unit, and a portion located outside the cavity.
The display panel that this application provided, every sound guide tube include the part that is located the cavity of second sound generating unit to can realize improving low frequency sound wave sound pressure level under the circumstances that does not increase display panel overall thickness.
In some embodiments, as shown in fig. 7 and 8, the second sub-tank 22 has a first opening 23 extending through its thickness;
each of the sound guide pipes 10 includes: a first portion located in the cavity of the second sound generating unit 5, and a second portion connected to the second sub-tank 22 through the first opening 23 and extending outside the second sound generating unit 5;
the first part comprises the sound inlet end of the sound guide tube 10 and the second part comprises the sound outlet end of the sound guide tube 10.
In some embodiments, as shown in fig. 7, the sound guide tube 10 includes a plurality of first sub sound guide tubes 17 and a plurality of second sub sound guide tubes 18 alternately connected, a first portion of the sound guide tube 10 is located in the cavity of the second sound emitting unit 5, and a second portion of the sound guide tube 10 is connected to the second sub case 22 through the first opening 23 and extends outside the second sound emitting unit 5. In fig. 7, the sound inlet end of the sound guiding tube 10 is located in the cavity, so as to communicate with the cavity, and the sound outlet end of the sound guiding tube 10 extends out of the second sound generating unit 5 through the first opening 23 and faces the vibration substrate 1. In fig. 7, the sound emitting end of the sound guide tube is illustrated as being in contact with the vibration substrate. Of course, in the implementation, the sound emitting end of the sound guide tube and the vibration substrate may not be in contact.
In some embodiments, as shown in fig. 8, a first portion of the sound guide tube 10 is located in the cavity of the second sound generating unit 5, and a second portion of the sound guide tube 10 is connected to the second sub-tank 22 through the first opening 23 and extends out of the second sound generating unit 5. The first part comprises a bent sound guide tube, i.e. the bent sound guide tube is located in the cavity of the second sound generating unit 5. In fig. 8, the plane of the curved sound guide tube is parallel to the planes of the first direction X and the second direction Y. In the specific implementation, as shown in fig. 8, the sound inlet end of the sound guide tube 10 is located in the cavity, so as to be communicated with the cavity, and the sound outlet end of the sound guide tube 10 extends out of the second sound generating unit 5 through the first opening 23 and faces the vibration substrate 1. In fig. 8, the case where the sound emitting end of the bending sound guide tube is in contact with the vibration substrate is exemplified. Of course, in the implementation, the sound emitting end of the bending sub-sound guide tube and the vibration substrate board may not be in contact.
In a specific implementation, when each sound guide includes a portion located within the cavity of the second sound emitting unit and a portion located outside the cavity, the second sound emitting unit may be disposed at an edge of the display panel, for example.
In the specific implementation, as shown in fig. 1, 2, 5, 6, 7 and 8, the first aluminum frame 11, the second aluminum frame 14, the first case 12 and the second case 15 are all provided with the magnet units 13, and the first aluminum frame 11 and the first case 12, and the second aluminum frame 14 and the second case 15 are all fixed by the magnetic attraction manner between the magnet units 13.
In some embodiments, the inner diameter of the sound tube is greater than 1 centimeter.
It should be noted that, the inside diameter of the sound guide pipe is too small to easily cause that sound waves propagate in the sound guide pipe to generate viscosity and loss, and the inside diameter of the sound guide pipe of the display panel provided by the embodiment of the application is greater than 1 cm, so that the influence of the too small inside diameter of the sound guide pipe on the propagation of sound waves in the sound guide pipe can be avoided.
In a specific implementation, when each sound guide tube comprises a plurality of sub sound guide tubes with different inner diameters, the inner diameters of the sub sound guide tubes are all larger than 1 cm.
In some embodiments, the material of the sound guide tube comprises one or a combination of the following: aluminum, plastic, rubber.
In some embodiments, as shown in fig. 9, the display panel includes a plurality of sub-display panels 19;
each of the sub-display panels 19 corresponds to one of the first sound generating units 4 or one of the second sound generating units 5.
That is, the display panel provided in the embodiment of the present application is formed by splicing a plurality of sub display panels.
In the implementation, as shown in fig. 9, each sub-display panel corresponds to one sound generating unit, that is, the side of each sub-display panel facing away from the display surface is provided with the sound generating unit.
In the implementation, as shown in fig. 9, the symmetry center of the display panel falls into the area 20 where all the second sound generating units 5 are located; the area where the first sound generating unit 4 is located surrounds the area 20 where the second sound generating unit is located. I.e. the second sound generating unit is arranged in the central area of the display panel.
In fig. 9, the number of the first sound generating units is greater than the number of the second sound generating units, and the sound generating units include two second sound generating units.
Of course, in the implementation, only a part of the sub-display panels corresponds to the sounding unit, that is, the sounding unit is disposed on the side of the sub-display panels facing away from the display surface, and no sounding unit is disposed on the side of the rest of the sub-display panels facing away from the display surface.
In some embodiments, the display module includes an electroluminescent device, that is, the display panel provided in the embodiments of the present application is an electroluminescent device. In a specific implementation, the electroluminescent device may be, for example, one of a Light-Emitting Diode (LED), an Organic Light-Emitting Diode (OLED), and a quantum dot Light-Emitting Diode (Quantum Dot Light Emitting Diodes, QLED).
The embodiment of the application provides a display device, which comprises the display panel provided by the embodiment of the application.
The display device provided by the embodiment of the application is as follows: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a digital photo frame, a navigator and the like. Other essential components of the display device are those of ordinary skill in the art, and will not be described in detail herein, nor should they be considered as limiting the application. The implementation of the display device can be referred to the embodiment of the display panel, and the repetition is not repeated.
In summary, the display panel and the display device provided by the embodiments of the application include a first sound generating unit and a second sound generating unit, where the first sound generating unit includes a first exciter, and the second sound generating unit includes a second exciter, so that the first exciter and the second exciter are driven to vibrate the substrate of the vibration substrate, and screen sound generation is realized. The frequency of the sound wave generated by the first exciter is larger than that of the sound wave generated by the second exciter, namely the sound generating frequency of the sound generating unit is divided, so that the first exciter is driven to drive the vibration substrate to vibrate to generate medium-high frequency sound waves, and the second exciter is driven to drive the vibration substrate to vibrate to generate low frequency sound waves. And because the second frame of the second sound production unit is connected with the sound guide pipe, the other end of the sound guide pipe faces the vibration substrate, and a sound source at the back of the display panel is transmitted to the front of the display panel through the sound guide pipe and generates interference action with a source at the front of the display panel, thereby enhancing the forward sound radiation of low-frequency sound waves, improving the sound pressure level of the low-frequency sound waves and realizing the low-frequency submergence of the sound production display panel.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (14)
1. A display panel, the display panel comprising: the display device comprises a vibration substrate, a display module and a plurality of sounding units, wherein the display module is positioned on one side of the vibration substrate;
the plurality of sound generating units include: at least one first sound generating unit, and at least one second sound generating unit;
the first sound generating unit includes: a first frame forming a cavity with the vibration substrate, a first exciter positioned in the cavity and contacted with the vibration substrate;
the second sound generating unit includes: a second frame forming a cavity with the vibration substrate, a second exciter positioned in the cavity and contacted with the vibration substrate;
the frequency of the sound wave generated by the first exciter is greater than the frequency of the sound wave generated by the second exciter;
the display panel further includes: at least sound guide tubes corresponding to the second sound producing units one by one;
each sound guide tube is provided with a sound inlet end and a sound outlet end; the sound inlet end of each sound guide tube is communicated with the cavity of one second sound production unit; in the area outside the second sound producing unit, the sound producing end of the sound guide tube faces the vibration substrate;
the distance between the sound emitting end and the plane where the surface of the vibration substrate on the side away from the display module is located is greater than or equal to 0.
2. The display panel of claim 1, wherein an orthographic projection of the sound outlet end of the sound guide tube on a plane of the vibration substrate is located outside the vibration substrate.
3. The display panel of claim 1, wherein the inner diameter of each of the sound guide tubes is the same at different locations.
4. A display panel according to claim 3, characterized in that the total length h of the sound guide tube fulfils the following condition:
wherein l is the distance between the sound emitting end and the center of the sound wave generated by the second sound generating unit, n is a positive integer, lambda 0 Is the first preset frequency acoustic wavelength.
5. The display panel according to any one of claims 1 to 4, wherein a center of symmetry of the display panel falls within an area where all of the second sound emitting units are located;
the area where the first sound generating unit is located surrounds the area where the second sound generating unit is located.
6. The display panel of claim 4, wherein each of the sound guide tubes comprises: curved sub-sound guide tubes extending in a curved manner.
7. The display panel of claim 1, wherein each of the sound guide tubes comprises: a plurality of sub-sound guide tubes having different inner diameters; different sub-sound guide pipes are alternately connected.
8. The display panel of claim 7, wherein each of the sound guide tubes comprises at least: a plurality of first sub-sound guide tubes and a plurality of second sub-sound guide tubes alternately connected;
the inner diameter of the first sub-sound guide tube is larger than that of the second sub-sound guide tube.
9. The display panel according to claim 6 or 7, wherein the first frame comprises: the first box body is contacted with the first aluminum frame;
the second frame includes: the second aluminum frame is bonded with the vibration substrate base plate through a glue material, and the second box body is in contact with the second aluminum frame;
the second box body is provided with a first sub box body opposite to the second exciter and a second sub box body connected with the second aluminum frame and the first sub box body; the second sub-box body is provided with a first opening penetrating through the thickness of the second sub-box body;
each of the sound guide pipes includes: a first portion located within the cavity of the second sound emitting unit, and a second portion connected to the second sub-tank through the first opening and extending beyond the second sound emitting unit;
the first portion includes an inlet end of the sound guide tube and the second portion includes an outlet end of the sound guide tube.
10. The display panel of claim 1, wherein the first frame comprises: the first box body is contacted with the first aluminum frame;
the second frame includes: the second aluminum frame is bonded with the vibration substrate base plate through a glue material, and the second box body is in contact with the second aluminum frame;
the second housing has a first sub-housing opposite the second actuator; the first sub-box body is provided with a second opening penetrating through the thickness of the first sub-box body;
the sound inlet end of each sound guide tube is connected with the first sub-box body through the second opening; and the rest part of the sound guide tube is positioned outside the second sound generating unit except the part connected with the first sub-box body.
11. The display panel of claim 1, wherein the sound guide tube has an inner diameter greater than 1 centimeter.
12. The display panel of claim 1, wherein the sound guide tube material comprises one or a combination of the following: aluminum, plastic, rubber.
13. The display panel of claim 1, wherein the display panel comprises a plurality of sub-display panels;
each sub display panel corresponds to a first sounding unit or a second sounding unit.
14. A display device comprising the display panel according to any one of claims 1 to 13.
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| CN114679672A (en) | 2022-06-28 |
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