CN112839289B

CN112839289B - Sound display structure under screen and electronic device

Info

Publication number: CN112839289B
Application number: CN202110047649.9A
Authority: CN
Inventors: 祝翠林
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2022-07-12
Anticipated expiration: 2041-01-14
Also published as: CN112839289A

Abstract

The application provides a pronunciation display structure under screen includes: the display panel comprises a display panel, a heat dissipation part formed on the display panel and at least one vibration part, wherein at least one open slot is formed in the heat dissipation part, the vibration parts are respectively accommodated in the open slot and attached to the display panel, and air is filled in a gap between the vibration parts and the inner wall of the open slot. The invention also provides an electronic device. The under-screen sound emission display structure provided by the invention can eliminate external interference and sound crosstalk, thereby improving the under-screen sound emission effect and improving the user experience.

Description

Sound display structure under screen and electronic device

Technical Field

The application relates to the technical field of display, in particular to a screen sounding display structure and an electronic device.

Background

In the modern communication industry, the market demands of products such as mobile phones, televisions, flat panels, notebooks, digital cameras and the like are increasing, various display devices are developing to a full screen, and in the manufacturing of flexible full screen display modules, the under-screen sounding technology is becoming the trend of the development of the next generation of mobile phones. The sound display structure under screen on the market at present generally adopts single and laminating to realize the sound production under the screen at the vibrating piece on center or the surface of radiating piece, and the sound display structure under screen of structure has transmission sound directive property and is unclear, leak sound, privacy defect such as not enough to can lead to that the sound effect is not good under the screen, user uses and experiences technical problem such as poor.

Therefore, the prior art has defects which need to be solved urgently.

Disclosure of Invention

The application provides a sound display structure under screen and an electronic device which can solve the technical defects.

In order to solve the above problems, the technical solution provided by the present application is as follows:

the application provides a pronunciation display structure under screen, includes: the display panel comprises a display panel, a heat dissipation part formed on the display panel and at least one vibration part, wherein at least one open slot is formed in the heat dissipation part, the vibration parts are respectively accommodated in the open slot and attached to the display panel, and air is filled in a gap between the vibration parts and the inner wall of the open slot.

In an embodiment of the present application, the heat dissipation member includes a metal layer, and the vibration member is attached to the display panel through an adhesive layer.

In an embodiment of the present application, the adhesive layer includes an adhesive layer for adhering the vibrating element and the display panel, and metal particles and/or graphene particles filled in the adhesive layer.

In an embodiment of the present application, the tie coat includes that two bond respectively the vibration piece reaches display panel's viscose layer and form two metal level or graphite alkene layer between the viscose layer.

In an embodiment of the present application, the vibrating elements are arranged in at least one row and/or at least one column.

In an embodiment of the present application, the slot penetrates through the heat dissipation member.

In an embodiment of the present application, the slot is a groove; the slotted opening faces the display panel.

In an embodiment of the present application, a dimension of an end of the slot close to the display panel is equal to or greater than a dimension of an end of the slot far from the display panel.

In an embodiment of the present application, a distance from each of the vibrating members to an inner wall of the corresponding slot is greater than 0.5mm and less than 0.7mm, and a distance between two adjacent slots is greater than 1.5 mm.

The application also provides an electronic device which comprises the under-screen sound emitting display structure.

The beneficial effect of this application does: the application provides a sound display structure under screen sets up at least one fluting on the radiating piece, accepts at least one vibrating piece in corresponding the fluting and laminating on display panel. Because of the vibrating piece with clearance intussuseption between the grooved inner wall is filled with air and vibrating piece and is directly laminated display panel is last, so, the screen of this case is sent the sound display structure and is had air vibration sound production and vibrating piece around the vibrating piece and drive two kinds of sound production modes of display panel vibration sound production to can promote sound production effect, improve user experience. In addition, because of the radiating piece generally includes the metal level, work as the vibration piece is acceptd when in the fluting, the radiating piece can shield the sound wave of vibration piece production to can eliminate the interference of outside to sound and the crosstalk between the sound that other vibration pieces produced, thereby can solve the sound directive property that exists among the prior art unknown, leak sound, defect problems such as privacy is not enough, further promote the screen that this application provided and send the sound display structure under the screen and send the sound effect, improve user experience.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are 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 to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a simplified schematic diagram of an under-screen sounding display structure according to a first embodiment of the present application;

FIG. 2 is a simplified schematic diagram of a display panel of the under-screen sound display structure shown in FIG. 1;

fig. 3 is a simplified schematic diagram of an under-screen sounding display structure according to a second embodiment of the present application;

fig. 4 is a simplified schematic diagram of an under-screen sounding display structure according to a third embodiment of 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. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all 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.

In the description of the present application, it is to be understood that the terms "width," "upper," "lower," and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The present application may repeat reference numerals and/or letters in the various implementations, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various implementations and/or configurations discussed.

This application is to current under screen sound emission display structure generally adopt single and laminating to realize the sound production under the screen at the vibrating part on center or the surface of radiating piece, so the under screen sound emission display structure of structure has transmission sound directive property unclear, leak sound, privacy defect such as not enough to lead to the screen sound emission effect not good, the user uses and experiences technical problem such as poor, arranges vibrating part in the radiating piece and makes vibrating part and display panel direct contact, has restricted to a certain extent the sound production scope of vibrating part can eliminate external interference, thereby promotes under the screen sound emission effect, improves user experience.

The under-screen sounding display structure of the present application will be described in detail below with reference to specific embodiments.

Referring to fig. 1 to fig. 2, fig. 1 is a simplified schematic diagram of an under-screen sound emitting display structure 100 according to a first embodiment of the present application, and fig. 2 is a simplified schematic diagram of a display panel 10 in the under-screen sound emitting display structure shown in fig. 1.

As shown in fig. 1, the under-screen sound display structure 100 includes a display panel 10, a heat dissipation member 20 and at least one vibration member 30. Specifically, the heat sink 20 is provided with at least one slot 21, and the vibration elements 30 are respectively accommodated in the slot 21 and attached to the display panel 10. One of the vibrating members 30 is received in one of the slots 21.

In the present application, the display panel 10 may be one of display panels such as an organic electroluminescent display panel (abbreviated as OLED), a liquid crystal display panel (abbreviated as LCD), a field emission display panel (abbreviated as FED), an inorganic electroluminescent display panel (abbreviated as LED), a plasma display panel (abbreviated as PDP), and a cathode ray tube display panel (abbreviated as CRT).

It should be understood that the specific type of the display panel 10 may be selected according to the actual application, for example, any one of the above-mentioned types may be selected, and therefore, the application does not limit the type of the display panel 10.

Referring to fig. 2, in an embodiment of the present application, the display panel 10 includes a flexible display panel 11, two polarizers 12 formed on two opposite sides of the flexible display panel 11, and a back plate 13 formed on one polarizer 12. The polarizer 12 is used to control light of the backlight source, only let light in a specific direction pass through, and filter light in other directions. The light processed by the polarizer 12 may control the brightness of the light emitted from the flexible display 11 through the twisting action of the liquid crystal molecules of the liquid crystal layer of the flexible display 11, so as to control the brightness of the display panel 10. The back plate 13 is located at one side of the backlight source and is used for supporting the flexible display screen 11 and the polarizer 12.

Wherein the heat sink 20 is used for dissipating heat from the display panel 10. In an embodiment of the present invention, the heat dissipation member 20 includes a first surface 22 and a second surface 23 opposite to the first surface 22, and the second surface 23 is attached to the display panel 10. In the present embodiment, the slot 21 penetrates the first surface 22 and the second surface 23 of the heat sink 20.

In an embodiment of the present application, the heat dissipation member 20 includes a metal layer and a heat dissipation foam layer. The metal layer has excellent heat conduction and shielding properties, so that the heat sink 20 has both a shielding function and a heat dissipation function.

Wherein the metal layer of the heat sink 20 can shield the sound wave generated by the vibration of the vibration element, so that the interference of the external environment to the sound and the crosstalk between the sounds generated by other vibration elements can be eliminated.

Preferably, the metal layer is copper, and the heat dissipation foam layer may be formed by mixing heat dissipation particles in a foaming composition to form a pre-mixture, and then foaming the pre-mixture. The heat dissipation particles can be graphite particles, carbon nanotube particles, and metal oxide particles such as aluminum oxide, zinc oxide, or titanium oxide. The foaming composition is polyurethane.

Of course, the material of the heat dissipation member 20 of the present application is not limited to the material described above as long as the heat dissipation and shielding function of the heat dissipation member 20 is ensured.

Wherein the number of the slots 21 is the same as the number of the vibration members 30. That is, one of the vibrating members 30 is disposed in one of the slots 21.

In an embodiment of the present application, a distance between two adjacent slots 21 is greater than 1.5 mm.

The vibrating member 30 vibrates when receiving a signal for generating sound by external vibration. Because the vibrating element 30 is attached to the display panel 10, the vibration of the vibrating element 30 can drive the display panel 10 to vibrate, so as to drive the air around the display panel 10 to vibrate, and then generate sound.

In addition, a gap exists between the vibrating element 30 and the inner wall of the corresponding slot 21, and the gap is filled with air. Therefore, when the vibrating member 30 vibrates, the air in the gap can be driven to vibrate, and then sound is generated. The two sounding modes are combined, so that the sounding effect under the screen can be further improved, and the user experience is improved.

In an embodiment of the present application, a distance from each of the vibrating members 30 to an inner wall of the corresponding slot 21 is greater than 0.5mm and less than 0.7 mm.

The vibration member 30 is generally of a piezoelectric type or an electromagnetic type. The electromagnetic type utilizes the stress of the conductive coil in a magnetic field to move up and down, thereby driving the display panel to vibrate and make sound. The piezoelectric type is to input a high-voltage alternating-current signal to the piezoelectric material by using the inverse piezoelectric effect so as to vibrate the piezoelectric material, thereby driving the display panel to vibrate. Of course, the vibrating member 30 may be other sound generating means other than piezoelectric and electromagnetic.

In an embodiment of the present application, the vibration members 30 are arranged in at least one row and/or at least one column, and preferably, the vibration members 30 are arranged in an array.

Wherein, the vibrating member 30 is attached to the display panel 10 by an adhesive layer 40.

In an embodiment of the present invention, the adhesive layer 40 includes an adhesive layer (not shown) for adhering the vibrating element 30 and the display panel 10, and metal particles and/or graphene particles filled in the adhesive layer.

In an embodiment of the present application, the material of the adhesive layer is UV glue. The viscidity that UV glued is high, density is big, can improve vibrating piece 30 with cohesive force between display panel 10 increases the reinforce vibrating piece 30 with connect firm nature between the display panel 10, improve the fixed position's of vibrating piece 30 accuracy, thereby improve vibrating piece 30 with stable transmission between the display panel 10 reduces the vibration loss. In addition, the UV glue has high conductivity to vibration and sound waves, and can further reduce sound emission, thereby improving the quality of the under-screen sound emission display structure 100.

In an embodiment of the present application, the metal particles and the graphene particles have high thermal conductivity, and can dissipate heat generated by the display panel due to vibration, so that heat dissipation loss caused by grooving on the heat dissipation member 20 can be compensated. Graphene particles still have good sound transmission effect, can be so that because of the sound conduction that vibration piece 30 vibration produced to display panel can strengthen the directive property of sound transmission, further promote the sound effect under the screen, improve user experience.

In an embodiment of the present invention, the adhesive layer 40 includes two adhesive layers (not shown) respectively adhering the vibrating element 30 and the display panel 10, and a metal layer or a graphene layer formed between the two adhesive layers. Preferably, the material of viscose layer is UV glues, the metal level is the copper layer. The UV glue can increase the connection firmness between the vibrator 30 and the display panel 10, improve the accuracy of the fixing position of the vibrator 30, reduce vibration loss, and reduce sound emission. The metal layer and the graphene layer may compensate for heat dissipation loss caused by grooving the heat dissipation member 20. Graphene layer still has good sound transmission effect, can make vibration piece 30 vibrates and the sound conduction that produces to display panel, can strengthen the directive property of sound transmission, further promotes the sound effect under the screen, improves user experience.

In an embodiment of the present application, the bonding layer 40 includes a bonding layer (not shown) that bonds the vibrating element 30 and the display panel 10 and a metal layer or a graphene layer formed on the bonding layer, and the projection of the bonding layer on the display panel 10 covers the projection of the metal layer or the graphene layer on the display panel 10. It is understood that the metal layer or the graphene layer may be formed between the vibration member 30 and the adhesive layer, or between the adhesive layer and the display panel. The adhesive layer is coated on the periphery of the metal layer or the graphene layer.

Referring to fig. 1 again, the under-screen sound display structure 100 further includes a display cover plate 50 formed on a surface of the display panel 10 away from the heat dissipation member 20, a touch layer (not shown) formed between the display panel 10 and the display cover plate 50, and an optical adhesive layer formed between the display panel 10 and the touch layer and/or between the touch layer and the display cover plate. Preferably, the display cover 50 has flexibility.

When the display panel 10 is subjected to an external pressure, the display screen cover 50 may buffer the pressure applied to the display panel 10, so that the display panel 10 is not damaged, and the impact resistance of the display panel 10 is increased. The touch layer 60 provides the touch characteristics to the underscreen acoustic display structure 100. The optical adhesive layer has the characteristics of being colorless and transparent, good in bonding strength, capable of being cured at room temperature or middle temperature, small in curing shrinkage, high in light transmittance of more than 90% and the like. The optical adhesive layer can bond the display panel 10 and the touch layer without affecting the display effect of the display panel 10, and when the display panel 10 is impacted by external force, the optical adhesive layer can also absorb or release part of the external force so as to reduce the impact on the display panel 10 and further improve the impact resistance of the display panel 10.

In an embodiment of the present application, the under-screen sound display structure 100 further includes a temperature sensing device (not shown) disposed on the display panel 10 and a processing device (not shown) electrically or signal-connected to the temperature sensing device. The temperature sensing device is used for monitoring the real-time temperature of the display panel 10 and transmitting the real-time temperature to the processing device in the form of data. The processing device is used for comparing the real-time temperature with a threshold temperature prestored in the processing device, and when the real-time temperature is equal to or exceeds the threshold temperature, sending a signal to the vibrating piece 30 to control the vibrating piece 30 to stop vibrating; when the real-time temperature is lower than the threshold temperature, a signal is sent to the vibrating member 30 to make it vibrate normally. It will be appreciated that the processing means may control the vibrating member 30 to vibrate at a lower vibration frequency before the real-time temperature approaches but does not reach the threshold temperature.

Referring to fig. 3, a second embodiment of the present application provides an under-screen audio display structure 200, where the under-screen audio display structure 200 is similar to the under-screen audio display structure 100 in structure, and the differences are only: the slot 61 of the under-screen sound emitting display structure 200 is a groove, an opening of the slot 61 faces the display panel 10, and the vibrating member 30 is accommodated in the slot 61.

Specifically, the slot 61 is formed by being recessed from the second surface 63 of the heat sink 60 of the under-screen sound emission display structure 200 toward the first surface 62 of the heat sink 60. Specifically, in the present embodiment, the slot 61 includes an inner wall 611, and the inner wall 611 is substantially U-shaped. Of course, in other embodiments, the shape of the inner wall 611 is not limited to a U-shape.

In the present embodiment, the size of the slot 61 close to the display panel 10 is the same as the size of the slot 61 far from the display panel 10. Of course, in other embodiments, the size of the end of the slot 61 close to the display panel 10 may also be smaller than the size of the end of the slot 61 far from the display panel 10.

In the present embodiment, a closed space is formed between the slot 61 and the display panel 10, and in the case that the heat sink 60 includes a metal layer having shielding performance, external interference can be better reduced and crosstalk of sound can be reduced; in the case where graphene particles or a graphene layer is included in the adhesive layer 40, the directivity of sound transmission can be further enhanced.

Referring to fig. 4, a third embodiment of the present application provides an under-screen audio display structure 300, where the under-screen audio display structure 300 is similar to the under-screen audio display structure 100 in structure, and the differences are only: the slot 71 of the under-screen sound emitting display structure 300 is a groove, an opening of the slot 71 faces the display panel 10, and the vibrating member 30 is accommodated in the slot 71. Specifically, the slot 71 is formed by recessing the second surface 73 of the heat sink 70 of the under-screen sound emission display structure 300 toward the first surface 72 of the heat sink 70.

In the present embodiment, a size of an end of the slot 71 close to the display panel 10 is larger than a size of an end of the slot 71 far from the display panel 10. That is, the slot 71 is substantially trumpet shaped. Thus, amplification and conduction of sound are facilitated.

Specifically, in the present embodiment, the slot 71 includes an inner wall 711, and the inner wall 711 has an arc shape. Of course, in other embodiments, the shape of the inner wall 711 is not limited to the circular arc shape, and it is sufficient to ensure that the overall shape of the groove 71 is substantially trumpet-shaped.

In the present embodiment, a closed space is formed between the slot 71 and the display panel 10, and in the case that the heat sink 70 includes a metal layer having shielding performance, external interference can be better reduced and crosstalk of sound can be reduced; in the case where graphene particles or a graphene layer is included in the adhesive layer 40, the directivity of sound transmission can be further enhanced.

The present invention also provides an electronic device (not shown) comprising an under-screen sound display structure 100 as described above. In the present application, the electronic device may be a mobile phone, a television, a tablet, a notebook, a digital camera, or the like.

The beneficial effect of this application does: according to the under-screen sound emission display structure, the heat dissipation part is provided with the at least one open groove, and the at least one vibration part is contained in the corresponding open groove and attached to the display panel. Because of the vibrating piece with clearance intussuseption between the grooved inner wall is filled with air and vibrating piece and is directly laminated display panel is last, so, the screen of this case is sent the sound display structure and is had air vibration sound production and vibrating piece around the vibrating piece and drive two kinds of sound production modes of display panel vibration sound production to can promote sound production effect, improve user experience.

In addition, include the metal level because of the radiating piece, work as the vibrating piece is acceptd when in the fluting, the radiating piece can shield the sound wave that the vibrating piece produced because of the vibration to can eliminate the interference to sound in the boundry and the crosstalk between the sound that other vibrating pieces produced, thereby can solve the sound directionality that exists among the prior art and be unclear, leak sound, privacy defect problems such as not enough, further promote the sound effect under the screen of the sound display structure under the screen that this application provided, improve user experience.

In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims

1. An under-screen sounding display structure comprising: the display panel, a heat dissipation member formed on the display panel and at least one vibration member, wherein the heat dissipation member is provided with at least one slot, the vibration member is respectively accommodated in the slot and attached to the display panel, and a gap between the vibration member and the inner wall of the slot is filled with air; the groove is a groove; the opening of the slot faces the display panel, and the size of one end of the slot close to the display panel is equal to or larger than that of one end of the slot far away from the display panel.

2. The under-screen acoustic display structure of claim 1, wherein the heat sink comprises a metal layer, and the vibrating member is attached to the display panel by an adhesive layer.

3. The under-screen sound display structure of claim 2, wherein the adhesive layer comprises an adhesive layer for bonding the vibrating member and the display panel, and metal particles and/or graphene particles filled in the adhesive layer.

4. The under-screen sound emitting display structure of claim 2, wherein the adhesive layer comprises two adhesive layers respectively adhering the vibrating member and the display panel, and a metal layer or a graphene layer formed between the two adhesive layers.

5. The under-screen sound display structure of claim 1, wherein the vibrating members are arranged in at least one row and/or at least one column.

6. The under-screen sound display structure of any one of claims 1-5, wherein the distance from each of the vibrating members to the inner wall of the corresponding slot is greater than 0.5mm and less than 0.7 mm; the distance between two adjacent slots is larger than 1.5 mm.

7. An electronic device, characterized in that it comprises an under-screen acoustic display structure according to any of claims 1-6.