CN110310616B - Sound generating device, display device and terminal - Google Patents
Sound generating device, display device and terminal Download PDFInfo
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- CN110310616B CN110310616B CN201910579165.1A CN201910579165A CN110310616B CN 110310616 B CN110310616 B CN 110310616B CN 201910579165 A CN201910579165 A CN 201910579165A CN 110310616 B CN110310616 B CN 110310616B
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/20—Sounding members
Abstract
The disclosure relates to a sound generating device, a display device and a terminal, wherein the sound generating device comprises a first electrode layer, an insulating layer, an electromagnetic coil and a magnetic vibrating diaphragm; the first electrode layer is arranged on the driving circuit layer; the insulating layer is arranged on one side of the first electrode layer; the electromagnetic coil is arranged on one side, far away from the first electrode layer, of the insulating layer, a through hole is formed in the insulating layer, the first electrode layer is connected with the electromagnetic coil through the through hole, and the electromagnetic coil is used for generating a magnetic field; the magnetic vibrating diaphragm is arranged on one side of the electromagnetic coil, which is far away from the insulating layer, and is used for responding to a magnetic field generated by the electromagnetic coil to vibrate and sound. The inside sounding of screen has been realized, has solved because the exciter encapsulation size is great, and the space under the screen is less, leads to the exciter to arrange the difficulty to the position of exciter is restricted, can't carry out the problem of full screen sounding.
Description
Technical Field
The disclosure relates to the technical field of terminal sounding, in particular to a sounding device, a display device and a terminal.
Background
The in-screen sounding technology is to convert an audio electric signal into mechanical vibration of a display screen through a sounding exciter, generate sound waves through vibration, achieve the purpose of sounding, and enable a receiver to be combined with the display screen so as to meet the requirements of a terminal on a comprehensive screen.
At present, an exciter is arranged below a screen to drive the screen to vibrate for sounding. Because the exciter package size is larger, and the space under the screen is smaller, the arrangement of the exciters is difficult, and the positions of the exciters are limited, so that full-screen sounding cannot be performed.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The purpose of this disclosure is to provide a sound generating apparatus, display device and terminal, and then overcome because the exciter encapsulation size is great at least to a certain extent, and the space under the screen is less, leads to the exciter to arrange the difficulty to the position of exciter is limited, can't carry out the problem of full screen sound production.
According to a first aspect of the present disclosure, there is provided a sound emitting device for a display device including a driving circuit layer, the sound emitting device comprising:
a first electrode line provided on the driving circuit layer;
an insulating layer provided on one side of the first electrode layer;
the electromagnetic coil is arranged on one side, far away from the first electrode layer, of the insulating layer, a through hole is formed in the insulating layer, the first electrode wire is connected with the electromagnetic coil through the through hole, and the electromagnetic coil is used for generating a magnetic field;
and the magnetic vibrating diaphragm is arranged on one side of the electromagnetic coil away from the insulating layer and is used for responding to a magnetic field generated by the electromagnetic coil to vibrate and sound.
According to a second aspect of the present disclosure, there is provided a display device including the above sound emitting device.
According to a third aspect of the present disclosure, there is provided a terminal comprising the display device described above.
The utility model provides a sound generating device produces the magnetic field through setting up in the solenoid of drive circuit layer, and magnetic diaphragm responds the magnetic field that solenoid produced and vibration sound production, has realized the inside sound production of screen, has solved because the exciter encapsulation size is great, and the space under the screen is less, leads to the exciter to arrange the difficulty to the position of exciter is limited, can't carry out the problem of full screen sound production, has reduced the peripheral device of screen, simple structure, and the integrated level is high, can realize arranging sound generating device in full screen scope to obtain better audio frequency effect, and can realize the combination of audio frequency and video at the display area.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
Fig. 1 is a schematic structural diagram of a sound generating device according to an exemplary embodiment of the present disclosure.
Fig. 2 is a schematic structural view of a first display device according to an exemplary embodiment of the present disclosure.
Fig. 3 is a schematic structural view of a second display device according to an exemplary embodiment of the present disclosure.
Fig. 4 is a schematic structural view of a third display device according to an exemplary embodiment of the present disclosure.
Fig. 5 is a schematic diagram of a distribution of electromagnetic coils according to an exemplary embodiment of the present disclosure.
Fig. 6 is a schematic diagram of a power line routing of a pixel electrode according to an exemplary embodiment of the present disclosure.
Fig. 7 is a schematic diagram of a first common electrode power line routing provided in an exemplary embodiment of the present disclosure.
Fig. 8 is a schematic diagram of a second common electrode power line routing provided in an exemplary embodiment of the present disclosure.
Fig. 9 is a schematic diagram of a third common electrode power line routing provided in an exemplary embodiment of the present disclosure.
In the figure:
100. a sound producing device; 110. a first electrode layer; 130. an insulating layer; 150. an electromagnetic coil; 170. a magnetic diaphragm; 190. a diaphragm packaging layer; 200. a driving circuit layer; 210. a sound-producing driving circuit; 230. scanning the signal line; 250. a data signal line; 270. a wiring spacer region; 300. a substrate base; 400. a display layer; 500. and a diaphragm packaging layer.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.
The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.
In this exemplary embodiment, there is provided a sound generating apparatus 100 first, the sound generating apparatus 100 being used for a display apparatus, the display apparatus including a driving circuit layer 200, as shown in fig. 1, the sound generating apparatus 100 including a first electrode layer 110, an insulating layer 130, an electromagnetic coil 150, and a magnetic diaphragm 170; the first electrode layer 110 is disposed on the driving circuit layer 200; the insulating layer 130 is disposed on one side of the first electrode layer 110; the electromagnetic coil 150 is arranged on one side of the insulating layer 130 far away from the first electrode layer 110, a through hole 131 is arranged on the insulating layer 130, the first electrode layer 110 is connected with the electromagnetic coil 150 through the through hole 131, and the electromagnetic coil 150 is used for generating a magnetic field; the magnetic diaphragm 170 is disposed on a side of the electromagnetic coil 150 away from the insulating layer 130, and is configured to vibrate and sound in response to a magnetic field generated by the electromagnetic coil 150.
According to the sounding device 100 provided by the embodiment of the disclosure, the electromagnetic coil 150 arranged on the driving circuit layer 200 generates a magnetic field, the magnetic diaphragm 170 responds to the magnetic field generated by the electromagnetic coil 150 to vibrate and sound, so that sounding inside a screen is realized, the problem that the exciter is difficult to arrange due to the fact that the packaging size of the exciter is large and the space under the screen is small, and the exciter cannot sound in a full screen mode due to the fact that the position is limited is solved, peripheral devices of the screen are reduced, the structure is simple, the integration level is high, the sounding device 100 can be arranged in the full screen range, a better audio effect can be obtained, combination of audio and video can be realized in a display area through UI interaction and other modes, and user experience is improved.
The material of the first electrode layer 110 and the electromagnetic coil 150 may be copper, or other conductive material. The material of the insulating layer 130 may be an organic material such as polyimide or an inorganic material such as silicon nitride. The magnetic diaphragm 170 may be a thin film doped with a magnetic component. The first electrode layer 110 and the electromagnetic coil 150 are connected through the via hole 131, the first electrode layer 110 and the electromagnetic coil 150 are connected with alternating driving signals to form a loop, and the electromagnetic coil 150 generates a magnetic field under the action of the alternating driving signals in the loop, and the magnetic field drives the magnetic diaphragm 170 to vibrate and sound.
Further, the sound generating device 100 provided in the embodiment of the present disclosure may further include a diaphragm packaging layer 500, a diaphragm support 190, and a sound generating driving circuit 210; the diaphragm support 190 is disposed on a side of the insulating layer 130 away from the first electrode layer 110, and the magnetic diaphragm 170 is connected to the diaphragm support 190. The diaphragm encapsulation layer 500 is disposed on the insulating layer 130 and encapsulates the electromagnetic coil 150, the diaphragm support 190, and the magnetic diaphragm 170. The electromagnetic coil 150 and the magnetic diaphragm 170 are packaged through the diaphragm packaging layer 500, so that isolation of the sound generating device 100 and the display device is realized, and mutual influence of the sound generating device 100 and the real device is avoided. The sounding driving circuit 210 is connected to the first electrode layer 110 and the electromagnetic coil 150, respectively, for outputting an alternating driving signal. The alternate driving signal is output by the sound-producing driving circuit 210 to control the magnetic field intensity generated by the electromagnetic coil 150, thereby controlling the magnetic diaphragm 170 to produce sound.
The following will describe each component of the sound generating apparatus 100 provided in the embodiment of the present disclosure in detail:
as shown in fig. 2, the diaphragm support 190 is disposed on a side of the insulating layer 130 away from the first electrode layer 110, and the magnetic diaphragm 170 is connected to the diaphragm support 190. The diaphragm support 190 may be an annular structure within which the electromagnetic coil 150 is located. The diaphragm support 190 is made of an insulating material. The magnetic diaphragm 170 and the electromagnetic coil 150 are encapsulated by the diaphragm encapsulation layer 500 with an air gap between the magnetic diaphragm 170 and the electromagnetic coil 150. For example, the diaphragm casing 500 may include a cavity, where the electromagnetic coil 150 is disposed at the bottom of the cavity, and the diaphragm support 190 is located on the sidewall of the cavity. The magnetic diaphragm 170 is formed on the top or side wall of the accommodating cavity, and an air gap is formed between the magnetic diaphragm 170 and the electromagnetic coil 150 by filling air. The magnetic field generated by the electromagnetic coil 150 drives the magnetic diaphragm 170 to vibrate in the accommodating cavity, and different alternating driving signals are provided for the electromagnetic coil 150 according to sounding requirements, so that the magnetic diaphragm 170 vibrates according to a preset rule to generate target sound. It will be appreciated that in some cases the diaphragm casing 500 may be integrally formed with the diaphragm support 190, i.e., the diaphragm casing 500 may act as a diaphragm support.
Of course, a filler layer may be provided between the magnetic diaphragm 170 and the electromagnetic coil 150 instead of an air gap. For example, the diaphragm packaging layer 500 may include a receiving cavity, the electromagnetic coil 150 is disposed at the bottom of the receiving cavity, the magnetic diaphragm 170 is formed at the top or the side wall of the receiving cavity, and a filling layer is filled between the magnetic diaphragm 170 and the electromagnetic coil 150. The magnetic field generated by the electromagnetic coil 150 drives the magnetic diaphragm 170 to vibrate in the accommodating cavity, and different alternating driving signals are provided for the electromagnetic coil 150 according to sounding requirements, so that the magnetic diaphragm 170 vibrates according to a preset rule to generate target sound. When the sound generating device 100 is manufactured, the magnetic diaphragm 170 may be provided with a filling layer between the electromagnetic coil 150 and the magnetic diaphragm 170 by vacuum evaporation, chemical deposition or sputtering, so as to facilitate the manufacture of the magnetic diaphragm 170. The material of the filling layer may be an elastic insulating material.
As shown in fig. 5, the driving circuit includes a plurality of display driving lines with a wiring spacer 270 therebetween, and a projection of the electromagnetic coil 150 on the driving circuit layer 200 is located at the wiring spacer 270.
The display driving lines may include scan signal lines 230 and data signal lines 250, the plurality of scan signal lines 230 are arranged laterally, the plurality of data signal lines 250 are arranged longitudinally, the plurality of data signal lines 250 and the scan signal lines 230 form a mesh-like structure in which non-data lines and signal line regions, i.e., mesh regions, are wiring spacing regions 270, and the electromagnetic coil 150 may be disposed in the wiring spacing regions 270. Each of the wiring spacers 270 may be correspondingly provided with a sound generating device 100, and the electromagnetic coils 150 of the plurality of sound generating devices 100 may be identical or different, which is not particularly limited in the embodiment of the present disclosure.
The vibration intensity of the magnetic diaphragm 170 is related to the intensity of the magnetic field generated by the electromagnetic coil 150, the intensity h=nl of the magnetic field generated by the coil is the number of turns of the electromagnetic coil 150, and I is the current on the electromagnetic coil 150, so that the sounding effect of different areas of the screen can be adjusted by setting the electromagnetic coils 150 with different numbers of turns and coil densities in different areas of the screen, or different currents are input to the electromagnetic coils 150 of different areas of the screen, and the sounding of the screen can be adjusted. Of course, in practical application, the number of turns of the electromagnetic coil 150 and the current can be combined to control the magnetic field generated by the electromagnetic coil 150, so as to control sounding.
In a possible embodiment of the present disclosure, as shown in fig. 2, the first electrode layer 110 is located on a side of the driving circuit layer 200 away from the light-emitting side, that is, the first electrode layer 110 is located below the driving circuit layer 200, at this time, when the display device is manufactured, the sound emitting device 100 may be formed on the substrate 300, after the packaging of the sound emitting device 100 is completed, planarization may be performed, and then the driving circuit layer 200, the display layer, the protection layer, and the like are formed. The display light side is a display side of the display device, and an image is formed on the light emitting side of the display device during display.
When the first electrode is located at a side of the driving circuit layer 200 remote from the light-emitting side, the diaphragm encapsulation layer 500 may be first formed on the substrate base 300 and then the diaphragm encapsulation layer 500 may be patterned at the time of fabrication; a receiving cavity is formed on the diaphragm encapsulation layer 500 and a diaphragm support 190, a magnetic diaphragm 170, an electromagnetic coil 150, an insulating layer 130, and a first electrode layer 110 are formed in the receiving cavity. Or the diaphragm support 190 and the magnetic diaphragm 170 may be first formed on the substrate 300; then encapsulated by the diaphragm encapsulation layer 500; finally, the electromagnetic coil 150, the insulating layer 130 and the first electrode layer 110 are formed on the diaphragm encapsulation layer.
The material of the diaphragm packaging layer 500 may be an inorganic material, such as silicon nitride, etc., and the material of the diaphragm packaging layer 500 may also be an organic material, such as polyimide, etc., and the diaphragm packaging layer 500 may be formed on the substrate 300 by deposition or sputtering, etc. The diaphragm packaging layer 500 is patterned by photoresist and a mask, and etched to form a receiving cavity, and diaphragm support posts 190 are formed in the receiving cavity. Then, a magnetic diaphragm 170 is formed in the accommodating cavity through processes such as vacuum evaporation, chemical deposition or sputtering, and the thickness of the magnetic diaphragm 170 is less than or equal to 1 micrometer. After that, a metal layer is formed, and the metal layer is patterned to form the electromagnetic coil 150. An insulating layer 130 is deposited on the electromagnetic coil 150, and a via 131 is formed on the insulating layer 130, the via 131 being filled with a conductive material, the via 131 being used to connect the electromagnetic coil 150 and the first electrode layer 110. Of course, the via hole can also be used for transmitting other signals between layers in practical application. The first electrode layer 110 is formed on a side of the insulating layer 130 remote from the electromagnetic coil 150, and the first electrode layer 110 may be formed by deposition, evaporation, or sputtering.
It will be appreciated that, as shown in fig. 4, the sound generating device 100 provided in the embodiment of the disclosure may also be formed separately and then connected to a side of the driving circuit layer 200 of the display device, which is far away from the light-emitting side, where the sound generating device 100 may further include a sound generating substrate. Forming a first electrode layer 110 on a sound emitting substrate; forming an insulating layer 130 on a side of the first electrode layer 110 away from the sound emitting substrate; forming an electromagnetic coil 150 on a side of the insulating layer 130 remote from the first electrode layer 110; a diaphragm support 190 and a magnetic diaphragm 170 are formed on the side of the electromagnetic coil 150 remote from the insulating layer 130, and are encapsulated. Connection pads may be disposed on the sounding substrate, and the driving circuit layer 200 is connected through the connection pads, so as to realize signal transmission between the driving circuit layer 200 and the sounding device 100.
In another possible embodiment of the present disclosure, as shown in fig. 3, the first electrode layer 110 is located on a side of the driving circuit layer 200 near the light-emitting side, that is, the first electrode layer 110 is located above the driving circuit layer 200, and when the display device is manufactured, the driving circuit layer 200 may be formed on the substrate 300 first, then the sound-emitting device 100 is manufactured on the driving circuit layer 200, and after the sound-emitting device 100 is packaged, the display layer and the protection layer are formed.
When the first electrode is located at a side of the driving circuit layer 200 near the light-emitting side, the driving circuit layer 200 may be first formed on the substrate base 300 and then the sound emitting device 100 may be formed on the driving circuit layer 200 at the time of manufacturing. When forming the sound generating apparatus 100, first, the first electrode layer 110 is formed on the driving circuit layer 200; forming an insulating layer 130 on the first electrode layer 110; forming an electromagnetic coil 150 on the insulating layer 130; forming a diaphragm packaging layer 500 on the insulating layer 130, then patterning the diaphragm packaging layer 500, forming a containing cavity on the diaphragm packaging layer 500, wherein the containing cavity is internally provided with a diaphragm support column 190, and the containing cavity exposes the electromagnetic coil 150; a filling layer and a magnetic diaphragm 170 are formed in the accommodating chamber. Alternatively, the diaphragm support 190 surrounding the electromagnetic coil 150 may be formed on the insulating layer 130; then forming a magnetic diaphragm 170 on the diaphragm support 190; finally, the film is encapsulated by a diaphragm encapsulation layer 500.
Wherein the first electrode layer 110 may be formed on the driving circuit layer 200, and the first electrode layer 110 may be formed by deposition, evaporation, or sputtering; forming an insulating layer 130 on the first electrode layer 110, forming a via hole 131 on the insulating layer 130, and filling the via hole 131 with a conductive material; the electromagnetic coil 150 is formed on the insulating layer 130, and the electromagnetic coil 150 is connected to the first electrode layer 110 through the via 131 on the insulating layer 130, which may be used for transmission of other signals between layers in practical applications. The diaphragm encapsulation layer 500 is formed on the insulating layer 130 and covers the electromagnetic coil 150, the diaphragm encapsulation layer 500 may be made of an inorganic material such as silicon nitride, or the like, the diaphragm encapsulation layer 500 may be made of an organic material such as polyimide, or the like, and the diaphragm encapsulation layer 500 may be formed on the substrate 300 through a deposition or sputtering process, or the like. The diaphragm encapsulation layer 500 is patterned by photoresist and a reticle and etched to form a receiving cavity exposing the electromagnetic coil 150. A filling layer is formed in the accommodating cavity, and then a magnetic diaphragm 170 is formed in the accommodating cavity through processes such as vacuum evaporation, chemical deposition or sputtering, and the thickness of the magnetic diaphragm 170 is less than or equal to 1 micrometer.
It can be appreciated that the sound generating device 100 provided in the embodiments of the present disclosure may be formed separately and then connected to the side of the driving circuit layer 200 of the display device near the light side, where the sound generating device 100 may further include a sound generating substrate. Forming a first electrode layer 110 on a sound emitting substrate; forming an insulating layer 130 on a side of the first electrode layer 110 away from the sound emitting substrate; forming an electromagnetic coil 150 on a side of the insulating layer 130 remote from the first electrode layer 110; a diaphragm support 190 and a magnetic diaphragm 170 are formed on the side of the electromagnetic coil 150 remote from the insulating layer 130, and are encapsulated. Connection pads may be disposed on the sounding substrate, and the driving circuit layer 200 is connected through the connection pads, so as to realize signal transmission between the driving circuit layer 200 and the sounding device 100.
The driving circuit layer 200 is a layer in which pixel circuits are arranged for a display device, and the driving circuit layer 200 may include transistors distributed in an array, and connection lines of the transistors. The driving circuit layer 200 may include a gate metal layer, a polysilicon layer, an interlayer insulating layer, a source drain metal layer, a passivation layer, and the like in terms of a hierarchical structure.
In practical applications, the sound generating device 100 may be disposed not only on the side of the driving circuit layer 200 near the light display side or on the side far from the light display side, but also between the layers of the driving circuit layer 200, which is not limited to this embodiment of the disclosure. For example, the electromagnetic coil 150 may be provided on the source-drain metal layer or the gate metal layer, and the magnetic diaphragm 170 may be provided on the passivation layer by inputting an alternating driving signal through the via hole.
The driving circuit layer 200 includes a pixel circuit power line, and the electromagnetic coil 150 includes a pixel circuit power line. The driving circuit layer 200 is provided with a power line for supplying power to the pixel circuit, and the electromagnetic coil 150 is formed by adjusting the direction of the power line. As shown in fig. 6, the pixel electrode power supply VDD line may be changed to be a solenoid, and the pixel electrode power supply VDD is input from an IP terminal, which is a positive signal, and an OP terminal, which is a negative signal. Or as shown in fig. 7 to 9, the common electrode power supply VSS line is changed in wiring manner as an electromagnetic coil. Fig. 7, 8 and 9 provide an exemplary routing manner, where the common electrode power source VSS is input from the IP terminal, which is a positive signal, and the OP terminal, which is a negative signal. Multiplexing the power supply lines of the pixel circuits with the electromagnetic coil 150 can reduce the number of signal lines of the display device, simplify the manufacturing process, and effectively reduce the thickness of the display device.
It should be noted that, the wiring diagrams provided in fig. 6 to 9 are only exemplary, and do not represent the common electrode power line or the pixel electrode power line as the electromagnetic coil, the wiring thereof must be in the manner shown in the drawings, and in practical applications, the common electrode power line or the pixel electrode power line may be in other forms, which is not limited to this embodiment of the disclosure.
Wherein, the power line of the pixel circuit is used as the electromagnetic coil 150, and the display and the sounding can be driven in a time-sharing way, so that the mutual interference of the display and the sounding is avoided. When the display device displays a picture, it is usually displayed frame by frame, and there is an idle time between each frame of picture, and an alternating driving signal may be input to the electromagnetic coil 150 during the idle time to drive the sound generating device 100 to generate a sound. Alternatively, the display and the sounding may be driven simultaneously, and at this time, a selection control circuit may be provided in the driving circuit layer 200 so that the power line outputs two signals for driving the display and the sounding, respectively.
In order to drive the electromagnetic coil 150, the electromagnetic coil 150 generates a varying magnetic field, the first electrode layer 110 and the electromagnetic coil 150 are connected to an alternating drive signal, and the through holes in the first electrode layer 110, the electromagnetic coil 150 and the insulating layer 130 form a closed loop, and the alternating drive signal flows through the electromagnetic coil 150 to generate the magnetic field.
The sounding driving circuit 210 is respectively connected with the first electrode wire and the electromagnetic coil 150, and on one hand, the sounding driving circuit 210 is used for outputting alternating driving signals; the sound-emitting drive circuit 210 is configured to control the supply of alternating drive signals to the plurality of electromagnetic coils 150. For example, sounding driver circuit 210 may include a plurality of switching sub-circuits, one for each electromagnetic coil 150, that are respectively connected to alternating drive signals and switch control signals, which are turned on in response to the switch control signals to transmit the alternating drive signals to electromagnetic coils 150.
The switching sub-circuit may comprise a switching transistor, such as a thin film transistor. The switching transistor includes a first end, a second end and a control end, the first end of the switching transistor is connected with the alternating driving signal, the second end of the switching transistor is connected with the electromagnetic coil 150, the control end of the switching transistor is connected with the switching control signal, and the switching transistor is turned on in response to the switching control signal so as to transmit the alternating driving signal to the electromagnetic coil 150.
The switching transistor provided in the embodiments of the present disclosure may be an N-type transistor or a P-type transistor, where a control end of the switching transistor may be a gate, a first end may be a source, and a second end may be a drain; alternatively, the control terminal of each transistor may be a gate, the first terminal may be a drain, and the second terminal may be a source. In addition, each transistor may be an enhancement transistor or a depletion transistor, which is not particularly limited in this exemplary embodiment.
In practical application, the switch sub-circuits in different areas of the display device can be controlled to be turned on to make different areas of the display device sound. The sound emission may be combined with the display screen, for example, when the current area of the display device is displayed, the sound emission device 100 in the current area may be controlled to emit sound.
The sound emitting device 100 provided by the present disclosure may be used for a liquid crystal display device, an OLED display device, a Micro LED display device, or the like, and the sound emitting device 100 is provided on the driving circuit layer 200 of the display device. For example, for a liquid crystal display device, the sound generating device 100 may be disposed under the liquid crystal layer, that is, between the substrate 300 and the pixel electrode; for an OLED display device, the sound emitting device 100 may be disposed under the OLED light emitting element layer, that is, between the substrate 300 and the pixel electrode; for Micro LED display devices, the light emitting elements are individually packaged, so the sound emitting device 100 may be disposed at any layer below the light emitting element layer, for example, the sound emitting device 100 may be disposed below a flexible circuit board of the Micro LED display device.
For the Micro LED display device, when the sounding device 100 is positioned below the flexible circuit board of the Micro LED display device, the sounding device 100 can be formed by adding two layers of metal wires and the magnetic vibrating diaphragm 170 on the flexible circuit board, the process is simple, the wires are convenient, and the display cannot be affected.
The display device may include a display layer 400, and the display layer 400 may be an OLED light emitting layer, a liquid crystal layer, or a Micro LED light emitting layer. The display layer 400 is disposed on a side of the driving circuit layer 200 near the display light emitting side. The sound generating device 100 may be located between the display layer 400 and the driving circuit layer 200, or the sound generating device 100 may be located between the substrate base 300 and the driving circuit layer 200, or the sound generating device 100 may be located at a side of the substrate base 300 away from the driving circuit layer, or the sound generating device 100 may be located between layers of the driving circuit layer, which is not limited in this embodiment of the disclosure.
According to the sounding device 100 provided by the embodiment of the disclosure, the electromagnetic coil 150 arranged on the driving circuit layer 200 generates a magnetic field, the magnetic diaphragm 170 responds to the magnetic field generated by the electromagnetic coil 150 to vibrate and sound, so that sounding inside a screen is realized, the problem that the exciter is difficult to arrange due to the fact that the packaging size of the exciter is large and the space under the screen is small, and the exciter cannot sound in a full screen mode due to the fact that the position is limited is solved, peripheral devices of the screen are reduced, the structure is simple, the integration level is high, the sounding device 100 can be arranged in the full screen range, a better audio effect can be obtained, combination of audio and video can be realized in a display area, and the use experience of a user is greatly enriched.
The exemplary embodiments of the present disclosure also provide a display device, where the display device includes the above-mentioned sound generating device 100, and the sound generating device 100 is disposed on the driving circuit layer 200 of the display device. The sound generating device 100 may be disposed on a side of the driving circuit layer 200 close to the light, or may be disposed on a side of the driving circuit layer 200 far from the light, or the sound generating device 100 may be disposed between the driving circuit layers 200. The display device provided by the embodiment of the disclosure may be a liquid crystal display device, an OLED display device, a Micro LED display device, or the like.
The display device includes a plurality of sound generating devices 100, and the plurality of sound generating devices 100 are distributed in the driving circuit layer 200 in an array manner. Alternatively, the display device may include a plurality of sound emitting areas, and the sound emitting devices 100 are respectively disposed in the plurality of sound emitting areas. Of course, in practical applications, the sound generating device 100 may have other arrangements on the display device, which is not specifically limited in the embodiments of the present disclosure.
The display device includes, for example, a driving circuit layer 200 including a plurality of display driving lines with a wiring spacer 270 therebetween, and a projection of the electromagnetic coil 150 on the driving circuit layer 200 is positioned at the wiring spacer 270. The display driving lines may include scan signal lines and data signal lines, the plurality of scan signal lines are arranged laterally, the plurality of data signal lines are arranged longitudinally, the plurality of data lines and signal lines form a mesh-like structure in which non-data lines and signal line regions, i.e., mesh regions, are wiring spacers 270, and the electromagnetic coil 150 may be disposed in the wiring spacers 270. Each of the wiring spacers 270 may be correspondingly provided with a sound generating device 100, and the electromagnetic coils 150 of the plurality of sound generating devices 100 may be identical or different, which is not particularly limited in the embodiment of the present disclosure.
The insulating layer 130 in the sound generating device 100 may be an insulating layer 130 corresponding to one sound generating device 100, or the insulating layer 130 may be shared by the sound generating devices 100 in the whole display device. When the insulating layer 130 is shared by the plurality of sound emitting devices 100, the insulating layer 130 covers the entire driving circuit layer 200, and at this time, a plurality of via holes for transmitting various display driving signals may be disposed in the insulating layer 130. For example, when the sound generating device 100 is located on the side of the driving circuit layer 200 near the light-emitting side, the via hole on the insulating layer 130 may be used to connect the source-drain metal layer of the driving transistor and the pixel electrode.
The display device provided by the embodiment of the disclosure, including sound generating device 100, sound generating device 100 produces the magnetic field through setting up in the solenoid 150 of drive circuit layer 200, magnetic diaphragm 170 responds the magnetic field that solenoid 150 produced and vibrates the sound production, realized the inside sound production of screen, solved because the exciter encapsulation size is great, and the space under the screen is less, lead to the exciter to arrange the difficulty, and the position of exciter is limited, can't carry out the problem of full screen sound production, reduced the peripheral device of screen, simple structure, the integrated level is high, can realize arranging sound generating device 100 at full screen scope, in order to obtain better audio frequency effect, and can realize the combination of audio frequency and video at the display area, very big abundant user experience.
The exemplary embodiment of the disclosure also provides a terminal, which comprises the display device. The terminal can comprise, for example, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and any other product or component with display and sounding functions.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (14)
1. A display device, characterized in that the display device comprises:
a substrate base;
the driving circuit layer is arranged on the substrate base plate and is a layer for arranging pixel circuits of the display device;
the sound production device comprises a first electrode layer, an insulating layer, an electromagnetic coil and a magnetic vibrating diaphragm, wherein the first electrode layer is arranged on the driving circuit layer, the insulating layer is arranged on one side of the first electrode layer, the electromagnetic coil is arranged on one side, far away from the first electrode layer, of the insulating layer, a through hole is formed in the insulating layer, the first electrode layer and the electromagnetic coil are connected through the through hole, the electromagnetic coil is used for generating a magnetic field, and the magnetic vibrating diaphragm is arranged on one side, far away from the insulating layer, of the electromagnetic coil and is used for responding to the magnetic field generated by the electromagnetic coil to vibrate and sound.
2. The display device of claim 1, wherein the sound emitting device further comprises:
and the vibrating diaphragm support is arranged on one side, far away from the first electrode layer, of the insulating layer, and the magnetic vibrating diaphragm is connected with the vibrating diaphragm support.
3. The display device of claim 2, wherein the sound emitting device further comprises:
and the vibrating diaphragm packaging layer is arranged on the insulating layer and is used for coating the electromagnetic coil, the vibrating diaphragm support and the magnetic vibrating diaphragm.
4. A display device as claimed in claim 3, wherein an air gap is provided between the magnetic diaphragm and the electromagnetic coil.
5. A display device as claimed in claim 3, characterized in that a filling layer is arranged between the magnetic diaphragm and the electromagnetic coil.
6. The display device of claim 1, wherein the drive circuit layer includes a plurality of display drive lines with a wiring spacer therebetween, and wherein a projection of the electromagnetic coil onto the drive circuit layer is located at the wiring spacer.
7. The display device according to claim 1, wherein the first electrode layer is located on a side of the driving circuit layer away from a light-emitting side.
8. The display device according to claim 1, wherein the first electrode layer is located on a side of the driving circuit layer near a light-showing side.
9. The display device according to claim 1, wherein the driver circuit layer includes a pixel circuit power supply line, and wherein the electromagnetic coil includes the pixel circuit power supply line.
10. The display device of claim 1, wherein the first electrode layer and the electromagnetic coil are coupled to an alternating drive signal, the electromagnetic coil generating a magnetic field in response to the alternating drive signal.
11. The display device of claim 10, wherein the sound emitting device further comprises:
and the sounding driving circuit is respectively connected with the first electrode layer and the electromagnetic coil and is used for outputting the alternating driving signal.
12. The display device according to claim 1, wherein the first electrode layer includes a first electrode line, the first electrode line being connected to the electromagnetic coil through the via.
13. The display device of claim 1, wherein the display device comprises a plurality of sound emitting devices, the plurality of sound emitting devices being distributed in an array in the driving circuit layer.
14. A terminal, characterized in that the terminal comprises a display device according to any of claims 1-13.
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| CN111163197B (en) * | 2020-01-14 | 2021-07-13 | 青岛海信移动通信技术股份有限公司 | Mobile terminal equipment and screen sounding method thereof |
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| JP4073890B2 (en) * | 2004-04-22 | 2008-04-09 | シャープ株式会社 | Thin film circuit board, piezoelectric speaker device and display device including the same, and sound source built-in display device |
| JP5116269B2 (en) * | 2006-08-25 | 2013-01-09 | 株式会社ジャパンディスプレイイースト | Image display device |
| TWI497876B (en) * | 2013-01-31 | 2015-08-21 | Univ Chung Hua | Electromagnetic drive spheres and their vehicles |
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| CN108616794B (en) * | 2018-04-25 | 2020-07-24 | 京东方科技集团股份有限公司 | Sound production device and manufacturing method thereof |
| CN109068245A (en) * | 2018-08-01 | 2018-12-21 | 京东方科技集团股份有限公司 | Screen sounding device, singing display screen and its manufacturing method and screen sonification system |
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