CN113676797A - Sound production device and display system - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/023—Screens for loudspeakers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- Acoustics & Sound (AREA)
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Abstract
The invention discloses a sound production device and a display system. In one embodiment, the display device comprises a controller, a conductive film and a fixing mechanism, wherein the fixing mechanism is used for fixing the conductive film on the light emitting side of the display device; the conductive film comprises a plurality of first conductive lines extending along a first direction and a plurality of second conductive lines extending along a second direction; the controller is used for sending current signals to the first conducting wire and the second conducting wire corresponding to the sounding position according to the obtained sounding position and the audio data, so that the first conducting wire and the second conducting wire corresponding to the sounding position can realize sounding. The sound production device of the embodiment has the characteristics of simple assembly, stronger sound field effect, wide application range and the like.
Description
Technical Field
The present disclosure relates to the field of display technology. And more particularly, to a sound generating device and a display system.
Background
With the continuous development of electronic information technology, electronic devices such as smart phones and tablet computers have been widely used, and become indispensable electronic products in user life. However, the existing electronic devices usually use a receiver and a speaker for sound generation, wherein both the receiver and the speaker need to be provided with holes.
However, the traditional sound generating device can transmit sound to be picked up by a user only by opening a through hole on the electronic equipment, so that the screen occupation ratio of the sound generating device applied to the current electronic equipment is large, the application range is limited, and the sound generating device is difficult to be applied to the electronic equipment with a small size.
Disclosure of Invention
An object of the present disclosure is to provide a sound generating device and a display system to solve at least one of the problems of the prior art.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
a first aspect of the present disclosure provides a sound generating device, including a controller, a conductive film, and a fixing mechanism for fixing the conductive film to a light emitting side of a display device, where the conductive film includes a plurality of first conductive wires extending along a first direction and a plurality of second conductive wires extending along a second direction;
the controller is used for sending current signals to the first conducting wire and the second conducting wire corresponding to the sounding position according to the obtained sounding position and the audio data, so that the first conducting wire and the second conducting wire corresponding to the sounding position can realize sounding.
Further, the material of the first conductive wire and the material of the second conductive wire are silver.
Furthermore, two ends of the first conducting wire are correspondingly connected with two first leading-out ends, two ends of the second conducting wire are correspondingly connected with two second leading-out ends, and the controller is respectively connected with the first leading-out ends and the second leading-out ends.
Further, the conductive film further includes a transparent insulating layer covering the first conductive line and the second conductive line.
Further, a projection of the first conductive line on the transparent insulating layer intersects a projection of the second conductive line on the transparent insulating layer. Further, the first conductive line and the second conductive line are arranged in a layered manner, and the transparent insulating layer includes a first transparent insulating layer located on one side of the first conductive line far away from the second conductive line, a second transparent insulating layer located between the first conductive line and the second conductive line, and a third transparent insulating layer located on one side of the second conductive line far away from the first conductive line.
Further, the thickness of the first transparent insulating layer, the thickness of the second transparent insulating layer, and the thickness of the third transparent insulating layer are respectively greater than the thickness of the first conductive line, and the thickness of the first transparent insulating layer, the thickness of the second transparent insulating layer, and the thickness of the third transparent insulating layer are respectively greater than the thickness of the second conductive line.
Furthermore, the first conductive lines are distributed at equal intervals, and the second conductive lines are distributed at equal intervals.
A second aspect of the present disclosure provides a display system, which includes a display device and a sound generating device according to the first aspect of the present disclosure.
Further, the display device comprises a display panel, the display panel comprises a black matrix unit and a plurality of pixel units, the black matrix unit is arranged on a substrate, the pixel units are arranged in an array, the projection of the black matrix unit on the substrate corresponds to the projection of the adjacent pixel units on the substrate at intervals, and the projection of the black matrix unit on the substrate covers the projection of the first conductive wire and the projection of the second conductive wire on the substrate respectively.
Further, the controller is further configured to determine the sound emission position according to audio data and image data of the display device.
The invention has the following beneficial effects:
the controller is used for sending current signals to the first conducting wire and the second conducting wire corresponding to the sounding positions, so that the first conducting wire and the second conducting wire corresponding to the sounding positions realize thermal sounding; moreover, the sound production device of the embodiment of the disclosure fixes the conductive film on the light emitting side of the display device through the fixing mechanism, is simple to assemble and convenient to install, effectively saves the space structure distribution, improves the screen occupation ratio of the display panel, and has wide application prospect.
Drawings
The following detailed description of embodiments of the present disclosure is provided in connection with the accompanying drawings.
Fig. 1 shows a side view of a sound emitting device of one embodiment of the present disclosure mounted to a display device;
FIG. 2 illustrates a top view of a sound emitting device of one embodiment of the present disclosure as mounted to a display device;
FIG. 3 shows a schematic layer structure diagram of a conductive film of an embodiment of the disclosure;
FIGS. 4a-4g illustrate a schematic flow chart for fabricating the conductive film of the embodiment of the present disclosure shown in FIG. 3;
fig. 5 illustrates an application scenario of a specific example of a sound generating apparatus according to an embodiment of the present disclosure;
fig. 6 illustrates a top view of a display system of another embodiment of the present disclosure.
Detailed Description
The references to "on … …", "formed on … …" and "disposed on … …" in this disclosure may mean that one layer is formed or disposed directly on another layer, or that one layer is formed or disposed indirectly on another layer, i.e., there is another layer between the two layers.
In the description of the present disclosure, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present disclosure and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present disclosure. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the description of the present disclosure, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
For the sound generating device in the prior art, in order to improve the sound generating performance of the sound generating device, the mode of arranging the exciter in the prior art is adopted to improve the sound generating quality. However, the number of parts of the exciter is large, all parts can be machined only by machining a plurality of sets of dies, and machining cost is high; and, when increasing the part quantity, further increased assembly cost and assembly degree of difficulty.
In the prior art, a display panel is used as a vibrating diaphragm to produce sound, which is called screen sound production. In the process of sounding, the whole display panel vibrates to sound. In order to facilitate the driving of the vibration of the display panel, the driving motor is usually designed at the center of the display panel, which makes the amplitude at the center of the screen larger than that at the edge, thereby affecting the display of the whole screen. Moreover, the design of the Display panel as the diaphragm can only be applied to an Organic Light-Emitting Display (OLED), but cannot be applied to a Liquid Crystal Display (LCD). The OLED display device can be made of flexible materials, and can well feed back sound; meanwhile, the OLED display device is light and thin in material, can be easily driven and can realize vibration sound production, the LCD display device is complex in structure and cannot adopt flexible materials, and then the sound vibration cannot be effectively restored, so that the LCD display device cannot realize screen sound production.
In addition, the working principle of the sound generating device of the existing display panel as the vibrating diaphragm is as follows: a traditional exciter is attached to the non-light-emitting side of the display panel, and the exciter drives the whole display panel to vibrate. Therefore, the power requirement on the exciter is large, and the volume of the exciter is relatively large in practical application, so that the exciter is difficult to be applied to a mobile terminal with a small volume, such as a mobile phone, a tablet computer and other electronic equipment powered by a battery and having a small volume.
In view of the above, embodiments of the present disclosure provide a sound generating device and a display system to solve one or more of the above problems.
A first embodiment of the present disclosure provides a sound generating device, as shown in fig. 1 and 2, including a controller 11, a conductive film 12, and the fixing mechanism 13;
the fixing mechanism 13 is used for fixing the conductive film 12 on the light-emitting side of the display device 2;
the conductive film 12 includes a plurality of first conductive lines 121 extending in a first direction and a plurality of second conductive lines 122 extending in a second direction;
the controller 11 is configured to send a current signal to the first conductive line 121 and the second conductive line 122 corresponding to the sounding position according to the obtained sounding position and the audio data, so that the first conductive line 121 and the second conductive line 122 corresponding to the sounding position realize sounding.
The embodiment of the disclosure is based on the thermo-acoustic effect, so that the first conducting wire and the second conducting wire generate the thermo-acoustic effect to perform positioning sound production. When the sound wave propagates in the air, pressure and displacement fluctuations occur, and during the propagation of the sound wave, temperature fluctuations also occur. When pressure, displacement and temperature fluctuations caused by sound waves act on a solid boundary phase, a significant conversion of sound wave energy and heat energy occurs, which is known as the thermoacoustic effect, i.e. the time-soaking mechanical effect in the sound field. The thermo-acoustic effect utilized by the disclosed embodiments utilizes heat to generate sound, i.e., thermally driven acoustic oscillations.
For example, the controller 11 applies a current signal to the first conductive line 121 and the second conductive line 122 at corresponding positions according to the obtained sounding position, so that the temperatures of the first conductive line 121 and the second conductive line 122 are rapidly changed, and thus the conductive thin film at the intersection of the first conductive line 121 and the second conductive line 122 generates a periodic temperature change, and the conductive thin film at the position rapidly exchanges heat with the surrounding medium, so that the surrounding medium generates periodic expansion and contraction, and then the sound is sounded. Illustratively, the medium of embodiments of the present disclosure is air.
Therefore, in the embodiment of the present disclosure, the controller 11 is utilized to send a current signal to the first conductive wire 121 and the second conductive wire 122 corresponding to the sounding position, so that the first conductive wire 121 and the second conductive wire 122 at the sounding position realize thermal sounding, and the sounding device of the embodiment of the present disclosure does not have mechanical vibration, and has a large working frequency range, a stronger sound field effect, and high positioning accuracy; in addition, the sound production device of the embodiment of the disclosure fixes the conductive film on the light emitting side of the display device through the fixing mechanism, is simple to assemble and convenient to install, effectively saves the space structure distribution, improves the screen occupation ratio of the display panel, and has wide application prospect. The working range frequency band of the sound generating device is wide, exemplarily, the sound generating frequency range which can be realized by the sound generating device is 100 Hz-100 kHz, the sound field effect of sound generated based on the thermoacoustic effect is strong, and the user experience can be improved.
In an alternative embodiment, as shown in fig. 2, the first conductive line extends along a first direction and the second conductive line extends along a second direction in a top view direction. Illustratively, the first direction is the X direction shown in fig. 2, and the second direction is the Y direction shown in fig. 2. The projection of the first conductive line 121 extending in the X direction on the top plane and the projection of the second conductive line 122 extending in the Y direction on the top plane intersect, and the intersecting area forms the target sound region shown in fig. 2.
For example, as shown in fig. 2, a projection of a conventional display device 2 in a top view direction is rectangular, a first direction X and a second direction Y are set to be perpendicular to each other according to an edge of the rectangular projection, and further, a projection of a first conductive line 121 extending in the X direction on a top view plane and a projection of a second conductive line 122 extending in the Y direction on a top view plane are set to intersect perpendicularly, so that a sound emission position in an image displayed by the display device can be quickly determined when the display device 2 displays a moving image and outputs audio data, such as a target sound area in fig. 2, and the controller 11 can determine the first conductive line 121 in the X direction and the second conductive line 122 in the Y direction corresponding to the sound emission position according to the sound emission position, thereby realizing quick and accurate sound emission positioning and improving positioning accuracy.
In another specific example, the first direction and the second direction of the present embodiment are determined according to the arrangement of the pixel units of the display device. Illustratively, the display device is a special-shaped screen, the pixel units of the display device are irregularly arranged, and if the pixel units are arranged in an array inclined by a certain angle relative to a rectangular coordinate system, the first direction and the second direction need to be determined according to the arrangement of the pixel units so as to avoid the influence of the first conductive wire and the second conductive wire on the luminous performance of the display device. Those skilled in the art should design the first direction and the second direction corresponding to the pixel unit arrangement structure of the display device according to practical application, and will not be described herein again.
In an alternative embodiment, the plurality of first conductive lines 121 are equally spaced and the plurality of second conductive lines 122 are equally spaced.
In one specific example, the spacing between adjacent first conductive lines 121 is equal to the spacing between adjacent second conductive lines 122. That is, as shown in fig. 2, the plurality of first conductive wires 121 and the plurality of second conductive wires 122 are uniformly distributed, so that when the sound generating device needs to be determined at any position in the image displayed by the display device, the sound generating position can be determined, and further, the controller 11 can conveniently and quickly locate the corresponding first conductive wires 121 and the corresponding second conductive wires 122 at the sound generating position.
In another specific example, the pitch of the adjacent first conductive lines is determined according to the length of the pixel unit in the second direction. Illustratively, as shown in fig. 6, the pixel units 22 of the display device are rectangular, and each pixel unit has a length a in the first direction (X direction) and a length b in the second direction (Y direction), that is, the entire width of the pixel unit shown in fig. 3 is a and the entire length is b. As shown in fig. 3, the adjacent first conductive lines 121 are separated by one pixel unit 22, and the distance between the adjacent first conductive lines is at least the length b of the pixel unit 22 (neglecting the black matrix between the pixel units), that is, the distance between the adjacent first conductive lines is at least a multiple of the length of the pixel unit in the second direction.
Similarly, the pitch of the adjacent second conductive lines is determined according to the length of the pixel unit in the first direction. Illustratively, in the structure shown in fig. 3, the distance between the adjacent second conductive lines is at least 3 pixel units wide (ignoring the black matrix width between the pixel units), that is, the distance between the adjacent second conductive lines is at least a multiple of the length of the pixel units in the first direction.
It should be noted that the embodiments of the present disclosure do not limit the specific distance between the adjacent first conductive lines and the adjacent second conductive lines, and for pixel units with different arrangements and display devices using the same, those skilled in the art should design the pixel units according to practical applications, and details thereof are not described herein. In an alternative embodiment, as shown in fig. 2, two ends of the first conductive line 121 are correspondingly connected to two first terminals 1211, two ends of the second conductive line 122 are correspondingly connected to two second terminals 1221, and the controller 11 is respectively connected to the first terminals 1211 and the second terminals 1221.
In the embodiment of the present disclosure, the first lead-out terminals 1211 at two ends of the first conductive line 121 disposed in the X direction are both connected to the controller 11, the controller 11 sends a current signal to the first conductive line 121 through the two first lead-out terminals 1211, and similarly, the second lead-out terminals 1221 at two ends of the second conductive line 122 disposed in the Y direction are connected to the controller 11, and the controller 11 sends a current signal to the second conductive line 122 through the two second lead-out terminals 1221. Since the first conductive wire and the second conductive wire in the embodiment of the disclosure respectively receive the current signal of the controller through the leading-out terminals at two sides, signal loss caused by signal attenuation in the current signal transmission process can be reduced, and the structure can be designed correspondingly to a large-sized display device, for example, so as to ensure positioning accuracy and sound production effect.
In a specific example, as shown in fig. 2, first terminals 1211 located on the same side of the plurality of first conductive lines 121 are bonded to the controller by COF technology, second terminals 1221 located on the same side of the plurality of second conductive lines 122 are bonded to the controller by COF technology, so as to form Bonding areas located outside two mutually perpendicular side portions of the display device shown in fig. 2, the Bonding areas located in the X direction are provided with the first terminals, and the Bonding areas located in the Y direction are provided with the second terminals.
In a specific example, the Bonding connection region formed by the controller and the first conductive wire and the second conductive wire bonded together by COF technology has good bending performance, and can be arranged on the non-light-emitting side of the display device after being bent, so that the overall volume is reduced, and the installation space of the whole device is increased.
In another optional embodiment, one end of the first conductive wire is correspondingly connected with a first leading-out terminal, one end of the second conductive wire is correspondingly connected with a second leading-out terminal, and the controller is respectively connected with the first leading-out terminal and the second leading-out terminal. Illustratively, the first leading-out ends of the first conducting wires are bonded with the controller through a COF technology to form Bonding connection areas of the first leading-out ends, and the second leading-out ends of the second conducting wires are bonded with the controller through the COF technology to form Bonding connection areas of the second leading-out ends.
In this embodiment, the Bonding pads of the first terminals may be formed only on one side portion of the outside of the display device, and the Bonding pads of the second terminals may be formed only on one side portion of the outside of the display device. That is, the first and second conductive wires different from those shown in fig. 2 are connected to the controller through two first and second terminals, respectively; the controller can be connected with the controller through a first leading-out terminal and a second leading-out terminal, so that the controller can be electrically connected with the first conducting wire and the second conducting wire respectively. Illustratively, the structure can be designed correspondingly with a small-sized display device, and has wide adaptability on the basis of higher positioning precision and good sounding effect.
The skilled person should select the way of connecting the first conductive wire and the second conductive wire to the controller respectively according to the practical application, and the detailed description is omitted here.
In an alternative embodiment, the conductive film 12 further includes a transparent insulating layer 123 covering the first conductive line 121 and the second conductive line 122.
As shown in fig. 2, the projection of the first conductive wire on the transparent insulating layer intersects with the projection of the second conductive wire on the transparent insulating layer, so as to determine a target sounding area according to the intersection area, thereby realizing positioning sounding.
As shown in fig. 3, in the thickness direction of the conductive thin film 12, the first conductive line 121 and the second conductive line 122 are insulated by the transparent insulating layer 123, so that current signal crosstalk between the first conductive line 121 and the second conductive line 122 is avoided, and independent transmission of current signals is achieved.
In an alternative embodiment, as shown in fig. 3, the first conductive line 121 and the second conductive line 122 are layered, and the transparent insulating layer 123 includes a first transparent insulating layer 1231 on a side of the first conductive line 121 away from the second conductive line 122, a second transparent insulating layer 1232 between the first conductive line 121 and the second conductive line 122, and a third transparent insulating layer 1233 on a side of the second conductive line 122 away from the first conductive line 121.
That is, the embodiment of the present disclosure is provided with the transparent insulating layer on both sides of the first conductive line and the second conductive line, and exemplarily, as shown in fig. 3, the conductive film 12 includes, in a thickness direction: a first transparent insulating layer 1231 at the bottom, a first conductive line 121 formed on the first transparent insulating layer 1231, a second transparent insulating layer 1232 formed on the first conductive line 121, a second conductive line 122 formed on the second transparent insulating layer 1232, and a third transparent insulating layer 1233 formed on the second conductive line 122, wherein the first conductive line 121 and the second conductive line 122 are arranged in a cross grid structure.
The conductive film of the embodiment of the disclosure has good transparency, does not affect the normal display of the display device, and also has good signal transmission performance.
In an alternative embodiment, the thickness of the first transparent insulating layer, the thickness of the second transparent insulating layer, and the thickness of the third transparent insulating layer are respectively greater than the thickness of the first conductive line, and the thickness of the first transparent insulating layer, the thickness of the second transparent insulating layer, and the thickness of the third transparent insulating layer are respectively greater than the thickness of the second conductive line.
The thickness of this disclosed embodiment sets up the thickness of transparent insulating layer, the thickness of first conductor line and the thickness of second conductor line to different thickness values for the thickness of each insulating layer all is greater than the thickness of first conductor line, and makes the thickness of each transparent insulating layer all be greater than the thickness of second conductor line, further realizes better insulating effect. Illustratively, the thickness of the first conductive line ranges from 50 nm to 500 nm, the thickness of the second conductive line ranges from 50 nm to 500 nm, and the thickness of the first transparent insulating layer, the thickness of the second transparent insulating layer, and the thickness of the third transparent insulating layer respectively range from 100 nm to 1000 nm. The greater the thickness of the conductive film, the greater its power.
Those skilled in the art should select the thickness of the corresponding transparent insulating layer and the thickness of the first conductive line and the second conductive line according to practical applications, and the design rule is that the thickness of each transparent insulating layer is greater than the thickness of the first conductive line and greater than the thickness of the second conductive line, respectively, and will not be described herein again.
The film layers of the conductive film are arranged in a layered mode, the first conductive wire and the second conductive wire are separated by the second insulating layer and are arranged in an intersecting mode, the first conductive wire and the second conductive wire can be fixed to the light emitting side of the display device through the fixing mechanism, and the conductive film in the fixing state has good toughness.
In one specific example, as shown in fig. 2, the fixing structure 13 is a double-layer frame, and the conductive film 12 is clamped and fixed between the double-layer frame to maintain the unfolded state. The two first terminals 1211 of the first conductive line 121 and the two second terminals 1221 of the second conductive line 122 are disposed outside the double-layered frame to facilitate Bonding with the controller 11. After the double-layer frame as the fixing structure 13 is fixed with the conductive film 12, the double-layer frame 13 is further fixed on the display device, and the double-layer frame fixed with the conductive film may be fixed on the light emitting side of the display device by means of, for example, bolting, adhesive bonding, or the like.
As shown in fig. 2, the fixing mechanism 13 fixes the conductive film 12 in a flat state, the fixing mechanism 13 is disposed on the light emitting side of the display device 2, and a vibration gap is formed between the conductive film 12 and the surface of the light emitting side of the display device 2, and a vibration space is left for the conductive film to generate a thermo-acoustic effect, which is exemplarily about 1-2 mm.
In an alternative embodiment, the material of the first conductive line and the material of the second conductive line are silver. The embodiment of the disclosure utilizes the conductive performance and the heat transfer performance of silver to ensure that the first conductive wire and the second conductive wire can realize stable signal transmission and realize good thermo-acoustic effect. In another specific example, the first conductive line and the second conductive line may also be made of a material with better conductivity, such as copper or aluminum.
In a specific example, the transparent insulating layer of the conductive film is a protective polymer material, and a parylene material may be used, for example: the Parylene C material (Parylene C) can be applied to an industrial vapor deposition process, and the first transparent insulating layer, the second transparent insulating layer and the third transparent insulating layer formed by the Parylene C material have the characteristics of uniform thickness, compactness, no pinholes, transparency, no stress and the like, and have excellent electrical insulation and protection.
In one specific example, as shown in fig. 4a to 4g, a method for manufacturing a conductive film according to an embodiment of the present disclosure includes the following steps:
s1, forming a sacrificial layer 32 on the substrate 31.
As shown in fig. 4a, a first transparent insulating layer 1231 is then formed on the sacrificial layer 32 by a chemical vapor deposition Process (PECVD). In one specific example, the first transparent insulating layer has a thickness of 500 nm and is made of parylene.
S2, a plurality of first conductive lines 121 extending in a first direction are formed on the first transparent insulating layer 1231.
Illustratively, the step S2 includes: the layer of conductive line material shown in fig. 4b is formed by physical vapor deposition (Sputter) deposition, and in one specific example, has a thickness of 400 nm and is silver. The conductive line material layer is then patterned, thereby forming a plurality of first conductive lines 121 as shown in fig. 4 c. In one specific example, as shown in fig. 2, the first conductive line extends in a first direction.
S3, a second transparent insulating layer 1232 is formed covering the first conductive line 121.
Illustratively, as shown in fig. 4d, the step S3 includes: the second transparent insulating layer is formed by a chemical vapor deposition Process (PECVD), and in one specific example, is also formed between adjacent first conductive lines. In one specific example, the first transparent insulating layer has a thickness of 500 nm and is made of parylene.
S4, a plurality of second conductive lines 122 extending in a second direction are formed on the second transparent insulating layer 1232.
Illustratively, the step S4 includes: the layer of conductive line material shown in fig. 4e is formed by a physical vapor deposition process, such as Sputter deposition (Sputter) deposition, and in one specific example has a thickness of 400 nanometers and is silver. The conductive line material layer is then patterned to form a plurality of second conductive lines 122 as shown in fig. 4 f. In one specific example, as shown in fig. 2, the second conductive line extends in the second direction, and the first conductive line and the second conductive line intersect.
S5, a third transparent insulating layer 1233 is formed covering the second conductive line 122.
Illustratively, as shown in fig. 4g, the step S5 includes: the third transparent insulating layer is formed by a chemical vapor deposition Process (PECVD), and in one specific example, is also formed between adjacent second conductive lines. In one specific example, the third transparent insulating layer has a thickness of 500 nm and is made of parylene.
S6, peeling the substrate 31 and the sacrificial layer 32, thereby forming the conductive film 12 of the embodiment of the disclosure as shown in fig. 3.
The conductive film has the beneficial effects of higher toughness and mechanical strength, and the conductive film structure can be made into a sound production device with any shape and size, such as a circle, a rectangle, a triangle, a polygon and the like, and the sound production device can be conveniently applied to a display device capable of producing sound, such as electronic fields of mobile phones, MP3, MP4, televisions, computers, ultrasonic imaging systems, distance measuring systems and the like, and other display devices capable of producing sound.
And fixing the conductive film formed in the step by using a fixing mechanism to enable the conductive film to be in a flattened state. And in the process of fixing the conductive film, reserving connection areas of two first leading-out ends for Bonding connection of the first conductive wire and the controller, and reserving connection areas of two second leading-out ends for Bonding connection of the second conductive wire and the controller. Furthermore, a fixing mechanism fixed with the conductive film is arranged on one side of the light emitting side of the display device.
The sound generating device of the embodiment of the present disclosure can be applied to the scene shown in fig. 5, as shown in fig. 5, the display device can be a mobile phone, and the display area can display dynamic images and sounds, for example, a person on the left side in the images is speaking, i.e., the target sound area shown in fig. 5.
At this time, the controller (not shown in fig. 5) can obtain the sound emission position of the target sound region in the current image by analyzing the image signal, and further controls to convert the sound emission position in the image of the display device into the sound emission position corresponding to the conductive film, thereby generating a current signal capable of representing the sound emission position, and sending the current signal to the corresponding first conductive wire 121 in the first direction and the second conductive wire 122 in the second direction. For example, in the illustration of fig. 5, lines from left to right of the first conductive line 121 in the X direction are identified as X1,X2,X3,X4,X5,X6,……,XNAnd the line from top to bottom of the second conductive line in the Y direction is marked as Y1,Y2,Y3,Y4,Y5,Y6,……,YNAt this time, the controller determines the first conductive line that should transmit the current signal as X according to the sound emission position of the display device4～X6The second conductive line is Y3～Y5. Meanwhile, the controller determines the corresponding first conductive line X according to the acquired audio information of the display device4～X6And a second conductive line Y3～Y5The current value of the transmitted current signal can be determined according to the audio information conversion, and then the controller transmits the current signal corresponding to the audio information to the corresponding first conductive wire and the second conductive wire, so that the input current of the first conductive wire and the second conductive wire is thermally generated.
In a specific example, the stronger the current signal is due to the superposition effect of the current signals, the stronger the sound field formed by the corresponding conductive wires is, that is, the sound of the target sound region in fig. 5 is stronger, and the sound of the surrounding display screen is weaker.
The working range frequency band of the sound generating device of the embodiment of the disclosure is wide, exemplarily, the sound generating frequency range which can be realized is 100 Hz-100 kHz, and the sound field effect of the sound generated based on the thermoacoustic effect is strong.
Corresponding to the above application scenario, another embodiment of the present disclosure provides a display system, which includes a display device and the sound generating device according to the first embodiment of the present disclosure.
According to the display system, the sound generating device is arranged on the light emitting side of the display device, and the sound generating device carries out thermal sound generation according to the obtained sound generating position of the display device and the audio data.
In an alternative embodiment, the controller of the embodiment of the present disclosure is further configured to determine the sound emission position according to audio data and image data of the display device.
That is, for the acquisition of the sound emission position, in one specific example, the controller of the embodiment of the present disclosure may determine the image data and the audio data by analyzing the image signal according to the image signal of the display device as described above. For example, the display device sends an image signal of a currently displayed picture to the controller, and the controller performs analysis according to the received image signal to obtain image data, wherein the image data can determine that the target sound region corresponds to a position in the currently displayed image, namely, a sound production position. The controller further determines the positions of the first conductive wire and the second conductive wire which send the current signals according to the sounding position. And the controller also analyzes the corresponding audio data according to the received image signal, and determines the magnitude of the current value of the current signal transmitted to the corresponding first and second conductive lines according to the analyzed audio data.
In another specific example, the controller of the embodiment of the present disclosure may also determine the image data and the audio data in a manner of directly receiving the image signal parsed by the display device. For example, the display device analyzes the current image signal to generate image data and audio data, wherein the image data can represent the position of the target sound region in the current image, i.e., the sound emitting position. The controller determines the position information, such as line identification, of the first conductive line and the second conductive line which need to send the current signal according to the received image data. The controller also determines a magnitude of a current signal sent to the corresponding first and second conductive lines based on the audio data.
Therefore, for the above-mentioned manner of acquiring the sounding position and the audio data, a person skilled in the art should select according to practical applications, and use the controller to send the corresponding current signal to the correct first conductive line and second conductive line according to the acquired sounding position and audio data as a design criterion, which is not described herein again.
In an alternative embodiment, the controller of the sound generating device is integrated with the display device. In a specific example, the display device comprises a controller for controlling signal transmission of the display device, and the controller of the display device can realize the functions of the controller of the sound generating device, and exemplarily, the controller of the display device has the functions of analyzing an image signal of the display device, determining a sound generating position according to the analyzed image signal, determining a corresponding first conductive wire and a second conductive wire according to the sound generating position, and acquiring audio data.
In another specific example, the controllers of the sound emitting devices may be integrated inside the display device, respectively, and the display device may include an image controller, an audio controller, and a current signal controller. In this example, the controller of the sound generating device may be integrated into various controllers of the display device, respectively, for example, the image controller may be capable of analyzing an image signal of a current screen of the display device to determine a sound generating position; the audio controller is capable of acquiring audio data; the current signal controller can send current signals to the corresponding first conducting wire and the second conducting wire according to the sounding position, and the numerical value of the current signals can be obtained through audio data.
Therefore, the controller of the embodiment of the present disclosure may be a separate unit integrated in the display device, or may be one or more controllers integrated in the display device, which are integrated in the display device, and have the advantages of high reliability, good performance, and the like.
In an alternative embodiment, the display device 2 includes a display panel, as shown in fig. 6, the display panel includes a black matrix unit 21 disposed on a substrate (not shown in the figure) and a plurality of pixel units 22 arranged in an array, a projection of the black matrix unit 21 on the substrate corresponds to a projection of an interval of adjacent pixel units 22 on the substrate, and the projections of the black matrix unit 21 on the substrate respectively cover the projections of the first conductive line 121 and the second conductive line 122 on the substrate.
Although the overall thickness of the conductive film is on the nanometer level, the embodiment of the present disclosure can further reduce the influence of the conductive film on the display screen, without affecting the normal display of the display device, by disposing the first conductive line 121 and the second conductive line 122 at the positions corresponding to the black matrix unit, so that the projections of the black matrix unit 21 on the substrate respectively cover the projections of the first conductive line 121 and the second conductive line 122 on the substrate, and thus the display system has good display performance.
In one specific example, as shown in fig. 6, the pixel units 22 may be a red pixel unit 22R, a green pixel unit 22R, and a blue pixel unit 22B, and pixel unit positions of corresponding colors are defined by a pixel definition layer, that is, a space is formed between adjacent pixel units by the pixel definition layer. In the embodiment of the present disclosure, the display panel further includes a black matrix unit disposed corresponding to the pixel defining layer, that is, the black matrix unit 22 is disposed corresponding to the interval between the adjacent pixel units 21. Further, the first conductive line 121 and the second conductive line 122 of the embodiment of the present disclosure are disposed at the interval, that is, the first conductive line 121 and the second conductive line 122 are disposed at positions corresponding to the black matrix unit 21, so as to avoid the first conductive line and the second conductive line from shielding the display screen.
Furthermore, as shown in fig. 6, the width d of the first conductive line 121 and the width of the second conductive line 122 are respectively smaller than the width d of the black matrix unit 21, that is, on the basis that the first conductive line 121 and the second conductive line 122 are disposed at the positions corresponding to the black matrix unit 21, the first conductive line 121 and the second conductive line 122 do not occupy the light emitting area due to the excessively large widths, in other words, the projection of the first conductive line and the second conductive line on the substrate is smaller than the projection of the black matrix unit on the substrate, and the first conductive line and the second conductive line do not occupy and block the pixel unit, thereby ensuring the display performance of the display system.
In a specific example, the interval between adjacent pixel units is 20 micrometers, as shown in fig. 6, the width d of the black matrix unit disposed corresponding to the interval is 20 micrometers, and the width d of the first conductive line and the second conductive line can be set to be less than 20 micrometers, thereby achieving good display performance of the display system.
It should be noted that the embodiment of the present disclosure does not limit the corresponding relationship between the first conductive line and the black matrix unit, and the embodiment of the present disclosure also does not limit the corresponding relationship between the second conductive line and the black matrix unit, that is, the first conductive line and the second conductive line may not be disposed at every position corresponding to the black matrix, for example, as shown in fig. 6, the first conductive line is not disposed at the space between the red pixel unit 22R and the green pixel unit 22G, and the first conductive line is not disposed at the space between the green pixel unit 22G and the blue pixel unit 22B, therefore, the first conductive line and the second conductive line of the embodiment of the present disclosure are disposed at the space between the adjacent pixel units, but the first conductive line and the second conductive line are not limited to be disposed at intervals with the adjacent pixel units one by one, and a person skilled in the art should perform the position arrangement of the first conductive line and the second conductive line at the space between the adjacent pixel units according to practical application, and will not be described in detail herein.
Another embodiment of the present disclosure provides a display device including the above display panel. The display device may be any product or component having a sound production display function, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, MP3, MP4, an ultrasonic imaging system, and a distance measuring system, which is not limited in this embodiment. In a specific example, the display device according to the embodiment of the present disclosure may be an OLED display device or an LCD display device, and is not limited by the structure of the display device, and the application range is wide.
The display system of the embodiment of the disclosure, the sound generating device is arranged on the light-emitting side of the display device, the sound generation corresponding to the display picture of the display device is realized by utilizing the thermo-acoustic effect, the working frequency range is large, the sound field effect is stronger, the positioning precision is high, the whole display system is simple to assemble, the installation is convenient, the space structure distribution is effectively saved, the screen occupation ratio of the display panel is improved, and the display system has wide application prospect.
It should be noted that the above-mentioned embodiments of the present disclosure are only examples for clearly illustrating the present disclosure, and are not limiting to the embodiments of the present disclosure, and it is obvious for those skilled in the art to make other variations or modifications on the above-mentioned description, and not exhaustive enumeration of all embodiments, and obvious variations or modifications of the technical solutions belonging to the present disclosure are within the scope of the present disclosure.
Claims (11)
1. A sound production device is characterized by comprising a controller, a conductive film and a fixing mechanism,
the fixing mechanism is used for fixing the conductive film on the light emergent side of the display device;
the conductive film comprises a plurality of first conductive lines extending along a first direction and a plurality of second conductive lines extending along a second direction;
the controller is used for sending current signals to the first conducting wire and the second conducting wire corresponding to the sounding position according to the obtained sounding position and the audio data, so that the first conducting wire and the second conducting wire corresponding to the sounding position can realize sounding.
2. The sound generating apparatus as claimed in claim 1, wherein the first conductive wire and the second conductive wire are made of silver.
3. The sound generating device according to claim 1, wherein two ends of the first conductive wire are correspondingly connected to two first terminals, two ends of the second conductive wire are correspondingly connected to two second terminals, and the controller is respectively connected to the first terminals and the second terminals.
4. The sound generating apparatus as claimed in claim 1, wherein the conductive film further comprises a transparent insulating layer covering the first conductive wire and the second conductive wire.
5. The sound generating device according to claim 4, wherein a projection of the first conductive wire on the transparent insulating layer intersects with a projection of the second conductive wire on the transparent insulating layer.
6. The sound generating device according to claim 5, wherein the first conductive wire and the second conductive wire are layered, and the transparent insulating layer includes a first transparent insulating layer located on a side of the first conductive wire away from the second conductive wire, a second transparent insulating layer located between the first conductive wire and the second conductive wire, and a third transparent insulating layer located on a side of the second conductive wire away from the first conductive wire.
7. The sound generating apparatus according to claim 6, wherein a thickness of the first transparent insulating layer, a thickness of the second transparent insulating layer, and a thickness of the third transparent insulating layer are respectively greater than a thickness of the first conductive wire, and a thickness of the first transparent insulating layer, a thickness of the second transparent insulating layer, and a thickness of the third transparent insulating layer are respectively greater than a thickness of the second conductive wire.
8. The sound generating apparatus of claim 1, wherein the plurality of first conductive lines are equally spaced apart and the plurality of second conductive lines are equally spaced apart.
9. A display system comprising a display device and a sound generating device according to any one of claims 1 to 8.
10. The display system according to claim 9, wherein the display device comprises a display panel including a black matrix unit disposed on a substrate and a plurality of pixel units arranged in an array, a projection of the black matrix unit on the substrate corresponds to a projection of a space between adjacent pixel units on the substrate, and the projections of the black matrix unit on the substrate respectively cover the projections of the first conductive line and the second conductive line on the substrate.
11. The display system of claim 9, wherein the controller is further configured to determine the sound emission location based on audio data and image data of the display device.
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