CN213342673U - Display device and soundable OLED screen - Google Patents

Abstract

The application provides a display device and OLED screen can give out sound, through pasting the structure and having connected the sound production backplate in OLED display structure's second side, can improve OLED display structure when as the screen that can give out sound, the vibration takes place the sound frequency that sends and only distributes in the not enough of high frequency channel, through the conduction of sound production backplate and drive OLED display structure vibration, under the condition of the hardware that does not additionally add the speaker, the sound production backplate through the laminating setting can realize that OLED display structure sends the sound of more low frequency channels, and then make display screen can compromise more true sound field and more frivolous molding.

Description

Display device and soundable OLED screen

Technical Field

The present invention relates to electronic technologies, and more particularly, to a display device and an Organic Light-Emitting Diode (OLED) screen.

Background

With the continuous development of electronic technology and the continuous improvement of customer demands, display devices are continuously developing towards large size, light weight and thin weight, and the display devices are lighter and thinner as a whole and also need to be internally provided with sound generating devices such as speakers. Due to the limitation of the internal space of the display device, the installation position space reserved for the loudspeaker is small, so that the loudspeaker installed in the display device can only meet the common playing function generally, the sound effect of more multi-channel sound cannot be realized, and the playing performance of the loudspeaker is poor.

In some technologies, the display device may use a "flat panel sound generation technology" in which an electromagnetic exciter is disposed behind a displayed image on the display screen, and the display screen generates sound through bending waves generated by modal resonance under the action of the electromagnetic exciter. I.e. the display screen in the display device can be used both for display and for sound production instead of a loudspeaker. Therefore, the display device does not need to be provided with a mounting position for the loudspeaker, so that the electronic equipment is designed to be thinner and lighter.

However, when the display screen of the display device is the OLED display panel, due to the characteristic of the inherent property (high young modulus) of the material of the OLED display panel, when the OLED display panel directly vibrates under the action of the exciter, the emitted sound is concentrated in the high frequency band and lacks the sound in the low frequency and the medium frequency bands, so that in order to realize sound emission in the full frequency band, devices such as a speaker and the like are additionally arranged in the display device, and thus the overall complexity of the display device with the OLED display panel is improved.

SUMMERY OF THE UTILITY MODEL

The application provides a display device and OLED screen can give sound through the sound production backplate that OLED pasted behind one's back for display device can transmit the sound to OLED display panel through the sound production backplate and send the sound of low frequency, intermediate frequency and high frequency channel, thereby has widened OLED display panel's screen sound production frequency response scope, and has reduced the whole complexity of the display device who has OLED display panel.

A first aspect of the present application provides a display device comprising: the device comprises an organic light emitting diode OLED display structure, a pasting structure, a sound production back plate and at least one exciter; wherein the OLED display structure first side is used for displaying an optical signal; the second side of the OLED display structure is attached to the first side of the sound production back plate through the pasting structure; the at least one exciter is attached to the second side of the sound production back plate, and the exciter is used for enabling the sound production back plate and the OLED display structure to vibrate and produce sound.

In an embodiment of the first aspect of the present application, the pasting structure includes: a plurality of double-sided adhesive tapes; the plurality of double-sided adhesive tapes are arranged according to a preset rule, and a gap exists between every two adjacent double-sided adhesive tapes.

In an embodiment of the first aspect of the present application, the preset rule includes: the plurality of double-sided adhesive tapes are parallel to the length or width direction of the OLED display device and are arranged at equal intervals.

In an embodiment of the first aspect of the present application, the method further includes: and the fixing structure is arranged on the second side of the sound production back plate and used for supporting and fixing the OLED display structure and the sound production back plate.

In an embodiment of the first aspect of the present application, an area of the sound-emitting back plate is smaller than an area of the OLED display structure; the first area of the OLED display structure protruding out of the sound production back plate comprises a Printed Circuit Board (PCB) of the OLED display structure.

In an embodiment of the first aspect of the present application, the method further includes: and the buffer structure is arranged between the position where the PCB is not arranged in the first area and the fixed structure and is used for supporting and protecting the PCB in the first area.

In an embodiment of the first aspect of the present application, the sound frequency of the sounding back plate and the OLED display structure vibrating to sound is distributed in low frequency, medium frequency and high frequency bands.

In an embodiment of the first aspect of the present application, the sound-emitting back plate includes: a first skin, a second skin, and an intermediate layer; the first skin and the second skin are respectively attached to two sides of the middle layer; the middle layer comprises a plurality of honeycomb cores which are arranged in a hexagonal mode, the hexagonal cross sections of the honeycomb cores are perpendicular to the first skin and the second skin, and the stretching ratio of the honeycomb cores in the first direction is smaller than a preset threshold value.

In an embodiment of the first aspect of the present application, the width of the gap is in the range of 1-100 mm.

A second aspect of the present application provides a soundable OLED screen comprising: the device comprises an organic light emitting diode OLED display structure, a pasting structure, a sound production back plate and at least one exciter; wherein the first side of the OLED display structure is used for displaying an optical signal; the second side of the OLED display structure is attached to the first side of the sound production back plate through the pasting structure; the pasting structure comprises: a plurality of double-sided adhesive tapes; the plurality of double-sided adhesive tapes are parallel to the length direction or the width direction of the OLED display device and are arranged at equal intervals, and a gap is formed between every two adjacent double-sided adhesive tapes; the at least one exciter is attached to the second side of the sound production back plate, and the exciter is used for enabling the sound production back plate and the OLED display structure to vibrate and produce sound.

In summary, the display device and the sound-emitting OLED screen provided in the present application have the sound-emitting back plate connected to the second side of the OLED display structure through the pasting structure, so that when the OLED display structure is used as the sound-emitting screen, the sound frequency generated by vibration is distributed only in the high frequency band, the frequency of the sound emitted by the OLED display device is distributed in low frequency, medium frequency and high frequency bands by the conduction of the sound-emitting back plate and the driving of the OLED display structure to vibrate, thereby, the device such as a loudspeaker, a subwoofer and the like is not needed to be arranged in the display device to compensate and modify the sound emitted by the OLED display panel, the overall complexity of the display device with the OLED display panel capable of producing sound is reduced, under the condition of not additionally adding hardware of a loudspeaker, the OLED display structure can emit more low-frequency-band sounds through the attached sound-emitting back plate, therefore, the OLED display screen can give consideration to both a real sound field and a thinner shape.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural view of a display device having a speaker;

FIG. 2 is a schematic view of another display device having a speaker;

FIG. 3 is a schematic diagram of a display device having an actuator;

fig. 4 is a schematic view of frequency ranges of sounds emitted from the sound-emitting screen provided in the present application;

fig. 5 is a schematic structural diagram of an embodiment of a display device provided in the present application;

FIG. 6 is a detailed structural schematic diagram of the pasting structure provided by the present application;

fig. 7 is a schematic structural diagram of an embodiment of a sound backplate provided in the present application;

FIG. 8 is a schematic structural view of an interlayer provided herein;

FIG. 9 is a schematic view of a fit structure between a middle layer and a skin of the sound-emitting back panel provided by the present application;

fig. 10 is a schematic cross-sectional view of the middle layer of the sound back plate provided in the present application;

FIG. 11 is a schematic structural view of a skin of a sound backplate provided by the present application;

fig. 12 is a schematic diagram illustrating an amplitude attenuation law when a display device provided by the present application conducts bending waves;

fig. 13 is a schematic structural diagram of an embodiment of a display device provided in the present application;

FIG. 14 is a schematic structural diagram of an embodiment of a buffer structure provided in the present application;

FIG. 15 is a schematic structural diagram of an embodiment of a buffer structure provided in the present application;

FIG. 16 is a schematic structural diagram of an embodiment of a buffer structure provided in the present application;

fig. 17 is a schematic structural diagram of another embodiment of a sound backplate provided by the present application;

FIG. 18 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;

FIG. 19 is a schematic structural diagram of another embodiment of a buffer structure provided in the present application;

fig. 20 is an enlarged cross-sectional view of the buffer structure provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic structural diagram of a display device with a speaker, and the display device shown in fig. 1 takes a television 11 as an example, and the television 11 includes: a display screen 12 and a speaker 13; among them, the speaker 13 is disposed behind the display screen 12 inside the television set 11. The speakers 13 are generally provided on the left and right sides of the direction in which the user views the display screen 12, and provide left and right channel sounds.

With the development of the demand of the users for the display devices in the market towards the direction of thinning and the continuous progress of the electronic technology, more and more key components such as the display screen, the base frame and the like in the display device can be realized with a thinner thickness, thereby reducing the overall thickness of the electronic device. Therefore, in addition to providing some devices for displaying inside the television set 11 shown in fig. 1, the space reserved for the speaker 13 becomes smaller and smaller, and the manufacturer of the television set 11 can only reduce the function of heavy bass and the like of the speaker 13 to reduce the space occupied by the speaker 13 in the television set 11. The loudspeaker 13 installed in the television 11 can only meet the common playing function, and can not realize more sound effect, thereby reducing the playing performance of the loudspeaker 13.

In other display devices, in order to pursue better audio and video effects, a separate projection screen is usually provided, and a separate sound box is provided as a speaker, for example, fig. 2 is a schematic structural diagram of another display device with a speaker, in which a television box 21 can project light beams onto a display screen 22 for a user to view video pictures, and can also provide sound signals to an external speaker 23 connected to the television box, so that the speaker 23 plays audio. In the electronic apparatus shown in fig. 2, since the speaker 23 needs to be independently provided, the speaker 23 can achieve more sound effects with a larger volume, and accordingly, the speaker 23 of the display device needs to occupy more external space.

In the display devices shown in fig. 1 and 2, the speakers have a problem of position limitation, and the sound played by the speakers comes from the display screen regardless of the speakers built in the display device or the external speakers, and thus the display devices do not have a good viewing and reproducing effect.

Accordingly, some electronic devices in the art have "sound screens," e.g., FIG. 3 is a schematic diagram of a display device having actuators, which may be electromagnetic, piezoelectric, magnetostrictive, and any other type and configuration of transducer. The multiple actuators disposed on the rear side of the display screen in the display device shown in fig. 3 can individually actuate the entire display screen to emit sound. For example, driver 131 provides a left channel sound signal, driver 132 provides a right channel sound signal, driver 133 provides a center channel sound signal, and so on. Under the action of the exciter, the display screen of the television set 11 is sounded by bending waves emitted by modal resonance. I.e. the display screen of the television set 11 can be used both for display and for sound production instead of loudspeakers. Therefore, in the display device such as the television 11, it is not necessary to provide a mounting position for the speaker, and the speaker can be replaced by a corresponding number of exciters, so that the display device can be designed to be thinner and lighter and can provide a stronger sound effect.

However, for some display devices having an Organic Light-Emitting Diode (OLED) display panel, the OLED display panel is not a good acoustic sound-generating material due to the inherent properties (high young modulus) of the OLED display panel, and when the OLED display panel directly vibrates under the action of an exciter, the generated sound is concentrated in a high frequency band, and the sound is sharp and harsh due to the lack of sound in low and medium frequency bands. For example, fig. 4 is a schematic diagram of a frequency range of sound emitted by the sound-emitting screen provided by the present application, where an abscissa is frequency, an ordinate is sound pressure SPL, and a curve B is sound emitted by the OLED display panel, it can be seen that in a region below 1000Hz, the sound pressure of the curve B is smaller, that is, low-frequency and medium-frequency sounds are emitted less, and at this time, an additional woofer is required for compensation. In addition, the curve a is the amplitude of the sound emitted by the display device provided in the following embodiments of the present application, and is illustrated in the following embodiments.

In summary, in the display device shown in fig. 3, if the OLED display panel is used as a sound-generating screen, in order to implement full-band sound generation, devices such as a speaker and/or a subwoofer are additionally disposed in the display device to compensate and modify the sound generated by the OLED display panel, so that the overall complexity of the display device having the sound-generating OLED display panel is relatively high, the sense of localization of a part of the sound is lost, and a real sound field and a lighter and thinner shape cannot be considered at the same time.

Therefore, the application provides an OLED display device and screen that can give sound, changes original OLED's vocal characteristic through the vocal backplate that OLED pasted behind one's back for display device can send the sound of low frequency, intermediate frequency and high frequency channel and conduct to OLED display panel through the vocal backplate, thereby widens frequency response, and has reduced OLED display panel's display device's whole complexity.

The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 5 is a schematic structural diagram of an embodiment of a display device provided in the present application, where the display device shown in fig. 5 may be an OLED display device having an acoustically active OLED screen, and the display device includes: OLED display structure 31, sound backplate 32, paste structure 33 and at least one actuator 34. The first side of the OLED display structure 31 is used for displaying an optical signal, the second side is attached to the first side of the sound-emitting back plate 32 through the attaching structure 34, and the at least one actuator 33 is attached to the second side of the sound-emitting back plate 32. The surface area of the sound backplate 32 is equal to or less than the surface area of the OLED display structure 31.

The OLED display structure 31, sound-generating backplate 32 and at least one actuator 34 of the display device shown in fig. 5 together serve to perform the sound-generating function of the display device. In fig. 5, the at least one exciter 33 includes two exciters, for example, wherein any one of the exciters 34 can be used to receive an electrical signal corresponding to the sound to be played, and convert the electrical signal into mechanical vibration, and then apply the mechanical vibration to the sound-emitting back plate 32. Sounding back plate 32 generates bending waves through modal resonance under the action of mechanical vibration of exciter 34, and the bending waves generated on sounding back plate 32 are diffused to the direction range of 360 degrees around the joint of exciter 34 and sounding back plate 32 as the center. The sound backplate 32 and the OLED display structure 31 to which the sound backplate 32 is attached vibrate reciprocally in the up-down direction in the drawing shown in fig. 5 under the action of the bending waves propagating in the sound backplate 32, thereby generating sound.

More specifically, in the present embodiment, since the frequency range of the OLED display structure 31 when the OLED display structure alone vibrates to generate sound is limited, in order to provide the sound-generating back plate 32, a paste structure 33 is further required to be disposed between the OLED display structure 31 and the sound-generating back plate 32 for fixing the two and conducting the vibration. Fig. 6 is a detailed structural schematic diagram of the pasting structure provided in the present application, and fig. 6 shows a specific implementation manner of the pasting structure 33. The pasting structure 33 is specifically implemented by a plurality of double-sided tapes, and the plurality of double-sided tapes are parallel to the length or width direction of the display device, for example, in fig. 6, the plurality of double-sided tapes are all arranged parallel to the lower side edge of the display device (also equivalent to being parallel to the lower side edge of the OLED display structure or the sound-emitting back plate), so that the pasting structure 33 can transmit vibration between the OLED display structure 31 and the sound-emitting back plate 32. Meanwhile, the multiple double-sided adhesive tapes are arranged at equal intervals, a gap exists between every two adjacent double-sided adhesive tapes, and the reserved gap can be used as an exhaust slot which is communicated in the left-right direction between the OLED display structure 31 and the sound-emitting back plate 32. The width of the gap can be set between 1 mm and 100mm, preferably between 2 mm and 4mm, so as to facilitate the air in the front and back pasting surfaces of the pasting structure 33 when the OLED display structure 31 and the sound-emitting back plate 32 are pasted together, and improve the pasting quality.

Therefore, in summary, in the OLED display device provided in this embodiment, the bonding structure connects the sound-emitting backplane to the second side of the OLED display structure, so that when the OLED display structure is used as a sound-emitting screen, the frequency of the sound emitted by the vibration is not distributed in a high frequency band, and the OLED display structure is driven to vibrate by the conduction of the sound-emitting backplane, so that the frequency of the sound emitted by the OLED display device is distributed in a low frequency band, a medium frequency band, and a high frequency band (the drawn sound frequency distribution may be a curve a shown in fig. 4), and therefore, there is no need to provide devices such as a speaker/subwoofer in the display device to compensate and modify the sound emitted by the OLED display panel, the overall complexity of the display device having the sound-emitting OLED display panel is reduced, and the OLED display structure can emit more sounds in a low frequency band by bonding the sound-emitting backplane without adding extra hardware of the speaker, therefore, the OLED display screen can give consideration to both a real sound field and a thinner shape.

In some implementations, in a specific implementation of the sound-emitting back plate provided in this embodiment, the sound-emitting back plate 32 specifically includes: for example, fig. 7 is a schematic structural diagram of an embodiment of the sound-emitting back panel provided by the present application, and as shown in fig. 7, two skins 321 are respectively disposed on both the first side and the second side of the middle layer 322, and the surface areas of the skins 321 and the middle layer 322 are the same, or the skins 321 may cover at least a portion of the middle layer 322.

Exemplarily, fig. 8 is a schematic structural diagram of an intermediate layer provided in the present application, and as shown in fig. 8, the intermediate layer 322 of the sound-emitting back plate 32 provided in this embodiment is formed by connecting a plurality of honeycomb cores arranged in a hexagonal shape, except for the honeycomb cores located around the structure, side surfaces corresponding to six sides of each honeycomb core are respectively connected to corresponding side surfaces of other six honeycomb cores. Fig. 9 is a schematic view of a fitting structure between the middle layer of the sound-emitting back panel and the skin, as shown in fig. 9, in the sound-emitting back panel, a cross section of a honeycomb core 3221 included in the middle layer 322 is perpendicular to the skin 321. In some implementations, the intermediate layer including the honeycomb core provided herein is parallel to the y-direction by providing two parallel sides of a hexagonal honeycomb core wall, and there is no parallel side in the x-direction honeycomb core wall, so that the sound backplate has different conductive properties in the x-direction and the y-direction. Specifically, the conduction performance difference in different directions is realized by adjusting the hexagonal stretch ratio of the section of the honeycomb core. Specifically, fig. 10 is a schematic cross-sectional structure diagram of the middle layer of the sound back panel provided in the present application. As shown in FIG. 10, the hexagonal cross section of the honeycomb core has a stretch ratio of d/L in the x-y direction. Wherein, the first direction is the y direction in the figure, the second direction is the x direction in the figure; d is the unit length of each honeycomb core in the x direction when a plurality of hexagonal honeycomb cores are arranged in sequence, and the unit length d is: the hexagonal honeycomb cores are sequentially arranged and then are arranged in the minimum length unit in the x direction, namely the hexagonal honeycomb cores are repeatedly arranged in the x direction according to the rule of unit length d; in fig. 10, the unit length d is the distance d between the hexagonal side (c) perpendicular to the x circumference and the side (c); l is the unit length of each honeycomb core in the y direction when a plurality of hexagonal honeycomb cores are arranged in sequence, and the unit length L refers to: the hexagonal honeycomb cores are sequentially arranged and then are arranged in the minimum length unit in the y direction, namely the hexagonal honeycomb cores are repeatedly arranged in the y direction according to the rule of unit length L; in fig. 10, the unit length L is the sum of the distances in the y direction of the hexagonal sides (i), (ii), (iii), (iv) and (iv). Since for the standard hexagonal shape the draw ratio in the x direction is 0.58: 1. In this embodiment, in order to make the sound-emitting back plate have different conductivity in different directions, all the honeycomb cores in the middle layer of the sound-emitting back plate may be stretched in the x direction of the hexagonal cross section at a preset stretching ratio, so that the stretching ratio of the hexagonal interface of each honeycomb core is less than a preset threshold of 0.58: 1. Wherein, when the stretching ratio d/L is smaller, it means that the hexagonal interface of the honeycomb core shown in fig. 10 has a denser parallel wall distribution in the y direction, and the rigidity is stronger, so that the bending wave is easily conducted by vibration; the hexagonal honeycomb core walls have a larger included angle and a weaker rigidity in the x direction, and thus easily absorb the conduction of bending wave vibration.

Therefore, the middle layer as shown in fig. 10 realizes that the sound-emitting back plate has different conductivity in the x direction and the y direction through the arrangement of the honeycomb core stretch ratio, and further, the sound-emitting back plate has different amplitude attenuation laws in the x direction and the y direction when conducting bending waves. Specifically, in the embodiment shown in fig. 10, when the stretch ratio in the y direction is less than 0.58:1, the conduction performance of the sound back plate in the x direction for bending waves is weaker than that in the y direction, which can cause the amplitude attenuation magnitude in the x direction of bending waves to be larger than that in the y direction of bending waves when the sound back plate provided with the intermediate layer shown in fig. 10 transmits bending waves.

Meanwhile, because the skins are attached to two sides of the middle layer, in order to match the conduction performance of the middle layer in the x-y direction, the fibers of the skins are correspondingly arranged in the middle layer provided by the embodiment. For example, fig. 11 is a schematic structural diagram of a skin of the sound-emitting back panel provided by the present application, such as a schematic structural diagram of a skin surface fiber shown in fig. 11, and the skin structure shown in fig. 11 is an interwoven fiber structure in the x-y direction, wherein the density of the fibers parallel to the y direction and perpendicular to the x direction is greater than the density of the fibers parallel to the x direction and perpendicular to the y direction. Alternatively, in another skin structure provided in this embodiment, the fibers parallel to the x direction and perpendicular to the y direction may not be provided, that is, the skin is a unidirectional fiber structure, and the directions of all the fibers are provided parallel to the y direction and perpendicular to the x direction.

Therefore, the structure of the skin shown in fig. 11 can be matched with the middle layer in conduction, so that the amplitude attenuation laws in the x direction and the y direction of the sounding back plate are different when the sounding back plate conducts bending waves. In particular, in the embodiment shown in fig. 11, the fibers of the skin have a denser distribution of parallel fibers in the y-direction, which is stiffer and therefore more susceptible to bending waves by vibration; and the fibers of the skin are sparsely distributed in the x direction parallel to the fibers, and the rigidity of the skin is weaker, so that bending waves are not easy to conduct through vibration. Therefore, when the skin acoustic backplate shown in fig. 10 and 11 are provided with the intermediate layer, the amplitude attenuation of the bending wave in the x direction is larger than that of the bending wave in the y direction when the bending wave is transmitted.

In some implementations, in the above embodiments, the material of the honeycomb core may be paper, aramid, metal, or other composite materials. In some implementations, in the above embodiments, the material of the skin includes, but is not limited to, glass fiber, carbon fiber, glass-carbon mixed fiber, plastic, lightweight aluminum, and the like. More specifically, the first skin and the second skin may be the same or different in thickness. In some implementations, the skin has a thickness in a range of: 0.1-0.5 mm; or, preferably, the thickness of the skin ranges from 0.1 mm to 0.18 mm.

More specifically, fig. 12 is a schematic diagram of an amplitude attenuation law when the display device provided by the present application conducts bending waves, and fig. 12 shows amplitude attenuation of the sounding back plate in each direction under the excitation of the exciter. In the x-y direction, when the point P (0,0) where x is 0 and y is 0 in the drawing is a position where the exciter 33 is attached to the sound emission back plate 32, the bending wave generated by the sound emission back plate 32 by the electromagnetic exciter 33 is diffused all around the point P, and the amplitude of the sound emission substrate at the point P is maximum. When the amplitude at the point P at a certain time is denoted as 100% by D, the amplitude gradually attenuates when the bending wave spreads 360 degrees around the point P in the sound backplate 32, and gradually attenuates from 100% by D to 90% by D and 80% by D … …. Especially for the x direction and the y direction separately, when the bending wave is conducted in the two directions, because the stretch ratio of the honeycomb core of the middle layer is smaller than the preset threshold value and the fiber density of the skin in the y direction is larger than that in the x direction, the amplitude attenuation value and the attenuation speed of the amplitude at the point P in the x direction are larger than those in the y direction.

In some implementations, fig. 13 is a schematic structural diagram of an embodiment of a display device provided in the present application, and the display device shown in fig. 13 further includes, on the basis of any one of the foregoing embodiments: and the fixing structure 35 is used for supporting and fixing the OLED display structure 31 and the sound-emitting back plate 32, and providing support protection for the whole body formed by pasting the OLED display structure 31 and the sound-emitting back plate 32. In a specific implementation, the display device shown in fig. 13 may be a television, the fixing structure 35 may also be referred to as a middle frame back plate of the television, and a rear case of the television may be covered on the fixing structure 35. The fixing structure 35 may be formed by enclosing a thin-walled structure with a protruded reinforcing frame and a middle reinforcing beam around, and a screw hole for mounting a tv bracket may be further disposed behind the fixing structure 35.

In some implementations, in the example shown in fig. 13, two exciters 34 are respectively disposed at the left and right sides of the display device, and then the two exciters 34 located at the left side and the two exciters located at the right side in fig. 13 are respectively used for providing the two sound signals of the right channel and the left channel, and the specific number of the exciters disposed in the display device is not limited in the embodiments of the present application. In addition, a main board 37, a power supply board 36, a screen drive (TCON) board 38, and the like of the display device may be further provided in the hollow of the fixing structure 35 of the display device.

The sound-emitting back plate 32 in the display device provided in this embodiment is connected to the fixing structure through the buffering structure, wherein fig. 14 is a schematic structural diagram of an embodiment of the buffering structure provided in this embodiment, as shown in fig. 14, the fixing structure 35 provided in this embodiment is not completely attached to the sound-emitting back plate 32, but is in a non-contact state where a certain distance is kept between the two, and the fixing structure 35 is connected to the sound-emitting back plate 32 by arranging the buffering structure 39 in a gap between the peripheral edge of the sound-emitting back plate 32 and the reinforcing longitudinal beam in the middle of the fixing structure 35. The material of the buffer structure may be a damping double-sided adhesive tape, and one side of all the buffer structures 39 facing the fixing structure 35 is located on the same plane, so as to be parallel to and bonded to the fixing structure 35.

Meanwhile, since the area of the sound-emitting back plate 32 of the display device is smaller than that of the OLED display structure 31, in the example shown in fig. 14, a partial area of the sound-emitting back plate 32 protrudes from the OLED display device 31, and the protruding partial area is enclosed by a dotted line and is denoted as a first area 311. And the OLED display device 31 is provided with a Printed Circuit Board 312 (PCB) on this region 311. It can be seen that if the fixing structure 35 is adhered behind the sound-emitting back plate 32, a certain space is formed between the OLED display structure 31 and the fixing structure 35 in the first area, and this space is located just at one side edge (usually the lower edge) of the display device, and once a user or a related person carries the display device, once the user or the related person holds the display device on the first area, the OLED display structure 31 may be damaged by the pressing force due to the space between the OLED display structure 31 and the fixing structure 35. Therefore, fig. 15 is a schematic structural diagram of an embodiment of the buffer structure provided in the present application, and as shown in fig. 15, in the display device provided in the embodiment of the present application, a portion of the buffer structure 39 is further disposed at a position in the first region 311 where the PCB312 is not disposed, and the hardness of the portion of the buffer structure disposed in the first region 311 is greater than that of the buffer structure disposed outside the first region 311.

Fig. 16 is a schematic structural diagram of an embodiment of a buffer structure provided in the present application, as can be seen from the interface diagram shown in fig. 16, the buffer structure 39 disposed in the first area between the OLED display structure 31 and the fixing structure 35 can protect the PCB312 in the first area, and even if a user or a related person holds the first area, the buffer structure 39 disposed between the OLED display structure 31 and the fixing structure 35 can uniformly distribute pressure to the whole OLED display structure 31, so as to avoid the damage such as cracking and the like to the OLED display structure 31 and the PCB312 thereon when the first area is pressed, the safety performance of the whole display device can be ensured, the service life of the display device can be prolonged, and the user experience can be further improved.

In some implementations, the sound-emitting backplate 32 can be a whole and cover the whole OLED display structure 31 on the basis of the OLED display structure 31 including the first region 311 (including the first region 311 below and the PCB312 disposed in the first region, and the covered structure can be shown with reference to fig. 6). Or, fig. 17 is a schematic structural diagram of another embodiment of the sound-emitting back plate provided by the present application, wherein the area of the sound-emitting back plate 32 may also be smaller than the area of the OLED display structure 31, and a plurality of sound-emitting back plates may be arranged according to the sound-emitting needs of the display device, for example, in fig. 17, two sound-emitting back plates 321 and 322 are arranged on the left and right sides of the display device as an example, each sound-emitting back plate is connected to an exciter, and then the sound-emitting back plates 321 and the sound-emitting back plates 322 may provide sound signals of a left channel and a right channel.

More specifically, fig. 18 is a schematic structural diagram of an embodiment of the display device provided in the present application, which illustrates a cross-sectional structure of the display device using the sound-emitting back plate 32 shown in fig. 17, wherein, since the area of the sound-emitting back plate 32 is smaller than the area of the OLED display structure 31, in the uppermost area 310 of the display structure, the OLED display structure 31 is not covered by the sound-emitting back plate 32, and therefore, the OLED display panel 31 is directly connected to the back plate of the display device, and the connection manner may also be a double-sided tape bonding manner.

In some implementations, fig. 19 is a schematic structural diagram of another embodiment of the buffer structure provided herein, and fig. 20 is an enlarged schematic sectional view of the buffer structure provided herein, as shown in fig. 19 and fig. 20, in this embodiment, the buffer structure 39 may be a buffer adhesive strip shown in a gate-type structure, and may also provide support protection for the space in the first area between the OLED display structure 31 and the fixing structure 35.

The foregoing is a preferred embodiment of the present application, which is not intended to be limiting in any way, and any simple modifications, equivalent variations and modifications made to the foregoing embodiment according to the technical spirit of the present application are within the scope of the present application.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A display device, comprising:

the device comprises an organic light emitting diode OLED display structure, a pasting structure, a sound production back plate and at least one exciter;

wherein the OLED display structure first side is used for displaying an optical signal; the second side of the OLED display structure is attached to the first side of the sound production back plate through the pasting structure;

the at least one exciter is attached to the second side of the sound production back plate, and the exciter is used for enabling the sound production back plate and the OLED display structure to vibrate and produce sound.

2. The display device according to claim 1,

the pasting structure comprises: a plurality of double-sided adhesive tapes; the plurality of double-sided adhesive tapes are arranged according to a preset rule, and a gap exists between every two adjacent double-sided adhesive tapes.

3. The display device according to claim 2,

the preset rule comprises the following steps: the plurality of double-sided adhesive tapes are parallel to the length or width direction of the OLED display device and are arranged at equal intervals.

4. The display device according to claim 3, further comprising:

and the fixing structure is arranged on the second side of the sound production back plate and used for supporting and fixing the OLED display structure and the sound production back plate.

5. The display device according to claim 4,

the area of the sounding back plate is smaller than that of the OLED display structure; the first area of the OLED display structure protruding out of the sound production back plate comprises a Printed Circuit Board (PCB) of the OLED display structure.

6. The display device according to claim 5, further comprising:

and the buffer structure is arranged between the position where the PCB is not arranged in the first area and the fixed structure and is used for supporting and protecting the PCB in the first area.

7. The display device according to any one of claims 1 to 6,

the sound frequency of the sounding back plate and the OLED display structure for vibration sounding is distributed in low-frequency, medium-frequency and high-frequency bands.

8. The display device according to any one of claims 1 to 6,

the sound production backplate includes: a first skin, a second skin, and an intermediate layer; the first skin and the second skin are respectively attached to two sides of the middle layer;

the middle layer comprises a plurality of honeycomb cores which are arranged in a hexagonal mode, the hexagonal cross sections of the honeycomb cores are perpendicular to the first skin and the second skin, and the stretching ratio of the honeycomb cores in the first direction is smaller than a preset threshold value.

9. The display device according to any one of claims 2 to 6,

the width of the gap ranges from 1 mm to 100 mm.

10. An acoustically active OLED screen, comprising:

the device comprises an organic light emitting diode OLED display structure, a pasting structure, a sound production back plate and at least one exciter;

wherein the first side of the OLED display structure is used for displaying an optical signal; the second side of the OLED display structure is attached to the first side of the sound production back plate through the pasting structure; the pasting structure comprises: a plurality of double-sided adhesive tapes; the plurality of double-sided adhesive tapes are parallel to the length direction or the width direction of the OLED display device and are arranged at equal intervals, and a gap is formed between every two adjacent double-sided adhesive tapes;

the at least one exciter is attached to the second side of the sound production back plate, and the exciter is used for enabling the sound production back plate and the OLED display structure to vibrate and produce sound.

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