CN113676797B - Sound generating device and display system - Google Patents
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- CN113676797B CN113676797B CN202110981456.0A CN202110981456A CN113676797B CN 113676797 B CN113676797 B CN 113676797B CN 202110981456 A CN202110981456 A CN 202110981456A CN 113676797 B CN113676797 B CN 113676797B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- 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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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Nonlinear Science (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention discloses a sound generating 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 includes a plurality of first conductive lines extending in a first direction and a plurality of second conductive lines extending in a second direction; and the controller is used for sending current signals to the first conductive wire and the second conductive wire corresponding to the sounding position according to the sounding position and the audio data, so that the sounding is realized by the first conductive wire and the second conductive wire corresponding to the sounding position. The sounding 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 emitting 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 are indispensable electronic products in the life of users. However, current electronic devices generally use an earpiece and a speaker to sound, wherein the earpiece and the speaker are required to be perforated on the electronic device.
The higher screen ratio becomes the target pursued by the user, but the traditional sound generating device often transmits sound through the through hole formed in the electronic equipment and is picked up by the user, so that the screen ratio of the sound generating device applied to the current electronic equipment is larger, the application range is limited, and the sound generating device is difficult to be applied to the electronic equipment with smaller volume.
Disclosure of Invention
An object of the present disclosure is to provide a sound emitting device and a display system to solve at least one of the problems of the prior art.
In order to achieve the above purpose, the present disclosure adopts the following technical scheme:
the 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, the conductive film including a plurality of first conductive lines extending in a first direction and a plurality of second conductive lines extending in a second direction;
and the controller is used for sending current signals to the first conductive wire and the second conductive wire corresponding to the sounding position according to the sounding position and the audio data, so that the sounding is realized by the first conductive wire and the second conductive wire corresponding to the sounding position.
Further, the material of the first conductive wire and the material of the second conductive wire are silver.
Further, two ends of the first conductive wire are correspondingly connected with two first leading-out ends, two ends of the second conductive 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 comprises a transparent insulating layer coating the first conductive wire and the second conductive wire.
Further, a projection of the first conductive line falling on the transparent insulating layer intersects a projection of the second conductive line falling on the transparent insulating layer. Further, the first conductive wire and the second conductive wire are layered, and the transparent insulating layer comprises a first transparent insulating layer positioned at one side of the first conductive wire far away from the second conductive wire, a second transparent insulating layer positioned between the first conductive wire and the second conductive wire, and a third transparent insulating layer positioned at one side of the second conductive wire far away from the first conductive wire.
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 larger than the thickness of the first conductive wire, 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 larger than the thickness of the second conductive wire.
Further, the plurality of first conductive wires are distributed at equal intervals, and the plurality of second conductive wires are distributed at equal intervals.
A second aspect of the present disclosure proposes a display system comprising a display device and a sound emitting device as in 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 and the pixel units are arranged on a substrate in an array mode, projection of the black matrix unit on the substrate corresponds to projection of adjacent pixel units on the substrate at intervals, and projection of the black matrix unit on the substrate covers projection of the first conductive wire and the second conductive wire on the substrate respectively.
Further, the controller is further configured to determine the sounding position according to the audio data and the image data of the display device.
The beneficial effects of the invention are as follows:
according to the sounding device, the controller is utilized to send current signals to the first conductive wire and the second conductive wire corresponding to the sounding position, so that the first conductive wire and the second conductive wire corresponding to the sounding position realize thermally-induced sounding, and the sounding device does not have mechanical vibration, is large in working frequency range, strong in sound field effect and wide in application range; and, the sound generating device of this disclosed embodiment passes through fixed establishment and fixes conductive film at display device light-emitting side, and the assembly is simple, and the installation of being convenient for effectively saves space structure distribution, improves display panel's screen ratio, has extensive application prospect.
Drawings
The following describes in further detail the specific embodiments of the present disclosure with reference to the drawings.
FIG. 1 illustrates a side view of a sound emitting device of one embodiment of the present disclosure when mounted to a display device;
FIG. 2 illustrates a top view of a sound emitting device of one embodiment of the present disclosure when mounted to a display device;
FIG. 3 is a schematic view showing a layer structure of a conductive film according to an embodiment of the present disclosure;
FIGS. 4a-4g illustrate a flow chart of making the conductive film of the embodiment of the present disclosure illustrated in FIG. 3;
FIG. 5 illustrates an application scenario of one specific example of a sound emitting device of an embodiment of the present disclosure;
fig. 6 shows a top view of a display system of another embodiment of the present disclosure.
Detailed Description
As used in this disclosure, "formed on … …," "formed on … …," and "disposed on … …" may mean that one layer is formed directly on or disposed on another layer, or that one layer is formed indirectly on or disposed on another layer, i.e., that other layers are present between the two layers.
In the description of the present disclosure, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present disclosure. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
For the sounding device in the prior art, in order to improve sounding performance of the sounding device, a mode of arranging an exciter in the prior art is adopted to improve sounding quality. However, the exciter has a large number of parts, and a plurality of sets of dies are often required to be processed to finish the processing of all parts, so that the processing cost is high; and, while increasing part quantity, further increase assembly cost and assembly degree of difficulty.
There are also ways of sounding with a display panel as a diaphragm, known as screen sounding. In the sounding process, the display panel integrally vibrates to sound. In order to facilitate driving vibration of the display panel, the driving motor is generally designed at a center position of the display panel, which makes the amplitude of the center of the screen larger than that of the edges, thereby affecting the display of the entire picture. Also, this design using the Display panel as a diaphragm can be applied only to an Organic Light-Emitting Display (OLED) and cannot be applied to a liquid crystal Display (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, can be driven easily and realize vibration sounding, and the LCD display device is complex in structure and cannot adopt flexible materials, so that sound vibration cannot be effectively reduced, and therefore, the LCD display device cannot realize screen sounding.
In addition, the working principle of the sounding device with the existing display panel as the vibrating diaphragm is as follows: the 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 larger, the size of the exciter is larger in practical application, and the exciter is difficult to apply to mobile terminals with smaller size, such as mobile phones, tablet computers and other electronic equipment with smaller size and battery power supply.
Accordingly, 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 proposes a sound generating apparatus, 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 wire 121 and the second conductive wire 122 corresponding to the sounding position according to the acquired sounding position and audio data, so that the first conductive wire 121 and the second conductive wire 122 corresponding to the sounding position realize sounding.
The embodiment of the disclosure is based on the thermo-acoustic effect, so that the first conductive wire and the second conductive wire generate the thermo-acoustic effect to perform positioning sounding. The sound wave generates pressure and displacement fluctuation when propagating in the air, and temperature fluctuation is also caused in the process of propagating the sound wave. When pressure, displacement and temperature fluctuations caused by sound waves act on a solid boundary, a significant conversion of sound wave energy into thermal energy occurs, which is known as the thermo-acoustic effect, i.e. the time-averaged mechanical effect in the sound field. The thermoacoustic effect utilized by embodiments of the present disclosure utilizes the heat generation sound, i.e., thermally driven acoustic oscillations.
Illustratively, the controller 11 applies a current signal to the first conductive wire 121 and the second conductive wire 122 at corresponding positions according to the acquired sounding positions, so that the temperatures of the first conductive wire 121 and the second conductive wire 122 are changed rapidly by sounding, and thus the conductive film at the intersection position of the first conductive wire 121 and the second conductive wire 122 generates periodic temperature change, and the conductive film at the position rapidly exchanges heat with surrounding medium, so that the surrounding medium generates periodic expansion and contraction, and further sounds are generated. Illustratively, the medium of embodiments of the present disclosure is air.
Therefore, the controller 11 is utilized to send current signals 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 thermally-induced sounding, and the sounding device of the embodiment of the disclosure has no mechanical vibration, and has a larger working frequency range, a stronger sound field effect and high positioning accuracy; and, the sound generating device of this disclosed embodiment fixes conductive film at display device light-emitting side through fixed establishment, and the assembly is simple, and the installation of being convenient for effectively saves space structure distribution, improves display panel's screen ratio, has extensive application prospect. The sound generating device of the embodiment of the disclosure has a wider frequency band in a working range, and can realize sound generation frequency ranging from 100Hz to 100kHz, so that the sound field effect of sound generated based on the thermo-acoustic effect is strong, and the experience of a user can be improved.
In an alternative embodiment, as shown in fig. 2, the first conductive line extends in a first direction and the second conductive line extends in a second direction in a top view. 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 intersects the projection of the second conductive line 122 extending in the Y direction on the top plane, and the intersection region forms the target sound region shown in fig. 2.
As shown in fig. 2, the projection of the display device 2 in the top view direction is rectangular, the first direction X and the second direction Y are set to be perpendicular to each other according to the side of the rectangular projection, and further, the projection of the first conductive wire 121 extending in the X direction on the top view plane and the projection of the second conductive wire 122 extending in the Y direction on the top view plane are set to be perpendicular to each other, so that when the display device 2 displays a moving image and outputs audio data, the sound emission position in the image displayed by the display device can be quickly determined, such as the target sound area in fig. 2, the controller 11 can determine the first conductive wire 121 in the X direction and the second conductive wire 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. The display device is an irregular screen, and the pixel units of the display device are arranged irregularly, for example, the pixel units are arranged in an array inclined at a certain angle relative to a rectangular coordinate system, and at this time, the first direction and the second direction need to be determined according to the arrangement of the pixel units, so that the influence of the first conductive wire and the second conductive wire on the luminous performance of the display device is avoided. 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 applications, and will not be described herein.
In an alternative embodiment, the plurality of first conductive lines 121 are equally spaced apart and the plurality of second conductive lines 122 are equally spaced apart.
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, 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 rapidly position the corresponding first conductive wires 121 and second conductive wires 122 at the sound generating position.
In another specific example, the pitch of adjacent first conductive lines is determined according to the length of the pixel unit in the second direction. As illustrated in fig. 6, the pixel units 22 of the display device are rectangular, each having a length a in the first direction (X direction) and a length b in the second direction (Y direction), that is, the pixel units illustrated in fig. 3 have an overall width a and a length b. As shown in fig. 3, adjacent first conductive lines 121 are separated by a pixel unit 22, and the distance between adjacent first conductive lines is at least the length b of the pixel unit 22 (the black matrix between the pixel units is ignored), that is, the distance between 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 specific distance between the adjacent first conductive lines and the adjacent second conductive lines is not limited in the embodiments of the present disclosure, and for the pixel units with different arrangements and the display device applying the arrangements, those skilled in the art should design according to practical applications, and will not be described herein again. In an alternative embodiment, as shown in fig. 2, two ends of the first conductive wire 121 are correspondingly connected to two first outgoing ends 1211, two ends of the second conductive wire 122 are correspondingly connected to two second outgoing ends 1221, and the controller 11 is respectively connected to the first outgoing ends 1211 and the second outgoing ends 1221.
In the embodiment of the disclosure, the first lead-out ends 1211 at two ends of the first conductive wire 121 disposed in the X direction are connected to the controller 11, the controller 11 sends out a current signal to the first conductive wire 121 through the two first lead-out ends 1211, and likewise, the second lead-out ends 1221 at two ends of the second conductive wire 122 disposed in the Y direction are connected to the controller 11, and the controller 11 sends out a current signal to the second conductive wire 122 through the two second lead-out ends 1221. Because the first conductive wire and the second conductive wire in the embodiment of the disclosure respectively receive the current signals of the controller through the leading-out ends at two sides, signal loss caused by signal attenuation in the current signal transmission process can be reduced, and the structure can be correspondingly designed with a large-size display device to ensure positioning accuracy and sounding effect.
In a specific example, as shown in fig. 2, the first terminals 1211 of the plurality of first conductive wires 121 on the same side are bonded to the controller by COF technology, the second terminals 1221 of the plurality of second conductive wires 122 on the same side are bonded to the controller by COF technology, so as to form a Bonding region on the outer sides of two mutually perpendicular sides of the display device as shown in fig. 2, the Bonding region in the X direction is provided with a first terminal, and the Bonding region in the Y direction is provided with a second terminal.
In a specific example, the Bonding connection area formed by the controller, the first conductive wire and the second conductive wire after being attached to each other through the COF technology has good bending performance, and the Bonding connection area is arranged on the non-light-emitting side of the display device after being bent, so that the whole size is reduced, and the installation space of the whole machine is improved.
In another alternative embodiment, one end of the first conductive wire is correspondingly connected to a first leading-out end, one end of the second conductive wire is correspondingly connected to a second leading-out end, and the controller is respectively connected to the first leading-out end and the second leading-out end. The first lead-out ends of the plurality of first conductive wires are bonded with the controller through a COF technology to form a Bonding connection region of the first lead-out end, and the second lead-out ends of the plurality of second conductive wires are bonded with the controller through a COF technology to form a Bonding connection region of the second lead-out end.
In this embodiment, the Bonding region of the first lead-out terminal may be formed only on one side of the display device, and the Bonding region of the second lead-out terminal may be formed only on one side of the display device. That is, the first conductive line and the second conductive line different from those shown in fig. 2 are connected to the controller through two first terminals and second terminals, respectively; in this embodiment, the first lead-out terminal and the second lead-out terminal are connected to the controller, so as to realize electrical connection between the first conductive wire and the second conductive wire of the controller respectively. The structure can be designed correspondingly with a small-sized display device, and has wide adaptability on the basis of higher positioning accuracy and good sounding effect.
The manner in which the first conductive line and the second conductive line are respectively connected to the controller should be selected by those skilled in the art according to practical applications, and will not be described herein.
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 falling on the transparent insulating layer intersects with the projection of the second conductive wire falling on the transparent insulating layer, so that a target sounding area is determined according to the intersecting area, and positioning sounding is achieved.
As shown in fig. 3, in the thickness direction of the conductive film 12, the first conductive line 121 and the second conductive line 122 are insulated by the transparent insulating layer 123, and current signal crosstalk between the first conductive line 121 and the second conductive line 122 is avoided, thereby realizing independent transmission of current signals.
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 located on a side of the first conductive line 121 away from the second conductive line 122, a second transparent insulating layer 1232 located between the first conductive line 121 and the second conductive line 122, and a third transparent insulating layer 1233 located 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 transparent insulating layers on both sides of the first conductive line and the second conductive line, and illustratively, as shown in fig. 3, the conductive film 12 includes, in the thickness direction: the first transparent insulating layer 1231 located at the bottom, the first conductive line 121 formed on the first transparent insulating layer 1231, the second transparent insulating layer 1232 formed on the first conductive line 121, the second conductive line 122 formed on the second transparent insulating layer 1232, the third transparent insulating layer 1233 formed on the second conductive line 122, and further, the first conductive line 121 and the second conductive line 122 are in a cross-aligned mesh structure.
The conductive film of the embodiment of the disclosure has good transparency, does not influence 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.
According to the embodiment of the disclosure, the thickness of the transparent insulating layer, the thickness of the first conductive wire and the thickness of the second conductive wire are set to be different thickness values, so that the thickness of each insulating layer is larger than that of the first conductive wire, and the thickness of each transparent insulating layer is larger than that of the second conductive wire, and a better insulating effect is further achieved. The first conductive line has a thickness in the range of 50-500 nm, the second conductive line has a thickness in the range of 50-500 nm, and the first transparent insulating layer, the second transparent insulating layer, and the third transparent insulating layer have thicknesses in the range of 100-1000 nm, respectively. The greater the thickness of the conductive film, the greater its power.
The thickness of the transparent insulating layer and the thicknesses of the first conductive lines and the second conductive lines are selected by those skilled in the art according to practical application, and the thickness of each transparent insulating layer is respectively greater than the thickness of the first conductive lines and the thickness of each transparent insulating layer is respectively greater than the thickness of the second conductive lines, which are not described herein.
According to the embodiment of the disclosure, the film layers of the conductive film are layered, the first conductive wires and the second conductive wires are separated by the second insulating layer and are arranged in an intersecting manner, the conductive film can be fixed on the light emitting side of the display device through the fixing mechanism, and the conductive film in a fixed state has good toughness.
In a specific example, as shown in fig. 2, the fixing structure 13 is a double-layered frame, and the conductive film 12 is clamped and fixed in the middle of the double-layered frame, maintaining 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 connection with the controller 11. After the conductive film 12 is fixed to the double frame as the fixing structure 13, the double frame 13 is further fixed to the display device, and the double frame to which the conductive film is fixed may be fixed to the light emitting side of the display device by bolting or bonding with an adhesive, for example.
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, 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 thermoacoustic effect, and the vibration gap is about 1-2mm, for example.
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 ensures that the first conductive wire and the second conductive wire can realize stable signal transmission and good thermo-acoustic effect by utilizing the conductive performance and the heat transfer performance of silver. In another specific example, the material of the first conductive wire and the second conductive wire may be 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 can be applied to an industrialized vapor deposition process, and the first transparent insulating layer, the second transparent insulating layer and the third transparent insulating layer formed by using the Parylene C material have the characteristics of uniform thickness, compactness, no pinholes, transparency, no stress and the like, and further have excellent electrical insulation property and protection property.
In a specific example, as shown in fig. 4a-4g, the method for manufacturing the conductive film according to the 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 (PECVD) process. In a 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, this step S2 includes: the conductive material layer shown in fig. 4b, which in one specific example is 400 nanometers thick and is silver, is formed by physical vapor deposition (dispenser) deposition. The layer of conductive material is then patterned to form 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 to cover the first conductive line 121.
Illustratively, as shown in FIG. 4d, this step S3 includes: the second transparent insulating layer is formed by a chemical vapor deposition Process (PECVD), and in a specific example, the second transparent insulating layer is also formed between adjacent first conductive lines. In a 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, this step S4 includes: the conductive material layer shown in fig. 4e, which in one specific example is 400 nanometers thick and is silver, is formed by a physical vapor deposition process such as Sputter deposition (dispenser). The layer of conductive material 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 to cover the second conductive line 122.
Illustratively, as shown in FIG. 4g, this step S5 includes: the third transparent insulating layer is formed by a chemical vapor deposition Process (PECVD), and in a specific example, is also formed between adjacent second conductive lines. In a specific example, the thickness of the third transparent insulating layer is 500 nm, and the material is parylene.
S6, peeling the substrate 31 and the sacrificial layer 32, thereby forming the conductive film 12 of the embodiment of the present disclosure as shown in fig. 3.
The conductive film has the beneficial effects of higher toughness and mechanical strength, and can be manufactured into sound-producing devices with any shape and size, such as circles, rectangles, triangles, polygons and the like, and the sound-producing devices can be conveniently applied to sound-producing display devices, such as mobile phones, MP3, MP4, televisions, computers, ultrasonic imaging, ranging systems and other sound-producing display devices.
And fixing the conductive film formed in the steps by using a fixing mechanism, so that the conductive film is in a flattened state. In the process of fixing the conductive film, a connecting area of two first leading-out ends, which are connected with the controller in a Bonding manner, of the first conductive wire is reserved, and a connecting area of two second leading-out ends, which are connected with the controller in a Bonding manner, of the second conductive wire is reserved. Further, a fixing mechanism to which the conductive film is fixed is mounted on the light-emitting side of the display device.
The sound generating apparatus of the embodiment of the present disclosure can be applied to the scene shown in fig. 5, and as shown in fig. 5, the display apparatus may be a mobile phone, and the display area of the display apparatus can display dynamic images and sounds, and illustratively, a person located on the left side in the images is speaking, that is, the target sound area shown in fig. 5.
At this time, the controller (not shown in fig. 5) can obtain the sounding position of the target sound area in the current image by analyzing the image signal, further control the sounding position in the image of the display device to be converted into the sounding position corresponding to the conductive film, thereby generating a current signal capable of representing the sounding position, and transmitting the current signal to the corresponding first directionAnd a second conductive line 122 sent to a second direction. For example, in fig. 5, the line from left to right of the first conductive line 121 in the X direction is denoted as X 1 ,X 2 ,X 3 ,X 4 ,X 5, X 6 ,……,X N The line from top to bottom of the second conductive line in the Y direction is denoted as Y 1 ,Y 2 ,Y 3 ,Y 4 ,Y 5, Y 6 ,……,Y N At this time, the controller determines that the first conductive line that should transmit the current signal is X according to the sounding position of the display device 4 ～X 6 The second conductive wire is Y 3 ～Y 5 . Meanwhile, the controller determines the first conductive wire X to be corresponding to the acquired audio information of the display device 4 ～X 6 Second conductive wire Y 3 ～Y 5 The magnitude of the 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 second conductive wire, so that the first conductive wire and the second conductive wire input currents into thermoacoustic sounds.
In a specific example, the stronger the current signal is due to the superposition of the current signals, the stronger the sound field formed by the corresponding conductive lines, that is, the stronger the sound of the target sound region in fig. 5, and the weaker the sound of the surrounding display screen.
The sound generating device of the embodiment of the disclosure has a wider frequency band, and can realize sound generating frequency ranging from 100Hz to 100kHz, and the sound field effect generated based on the thermo-acoustic effect is strong.
Corresponding to the application scenario, another embodiment of the present disclosure provides a display system, including a display device and a sound generating device provided in the first embodiment of the present disclosure.
According to the display system, the sounding device is arranged on the light emitting side of the display device, and the sounding device performs thermally-induced sounding according to the sounding position and the audio data of the acquired display device.
In an alternative embodiment, the controller of the disclosed embodiment is further configured to determine the sound emission location based on audio data and image data of the display device.
That is, for the acquisition of the sounding site, in a 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 using the aforementioned image signal according to the display device. The display device sends an image signal of the current display screen to the controller, and the controller analyzes the image signal to obtain image data according to the received image signal, wherein the image data can determine that the target sound area corresponds to the position in the current display image, namely, the sounding position. The controller further determines the positions of the first conductive wire and the second conductive wire for sending the current signal according to the sounding position. And the controller analyzes corresponding audio data according to the received image signals, and determines the magnitude of the current value of the current signal sent to the corresponding first conductive wire and second conductive wire according to the analyzed audio data.
In another specific example, the controller of the embodiment of the present disclosure may further determine the image data and the audio data in a manner of directly receiving the image signal parsed by the display device. The display device, for example, parses the current image signal to generate image data and audio data, wherein the image data is capable of characterizing the location of the target sound area in the current image, i.e., the sound production location. The controller determines, based on the received image data, positional information, such as a line identification, of the first conductive line and the second conductive line, which are to transmit the current signal. The controller also determines the magnitude of the 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 application, and the controller sends corresponding current signals to the correct first conductive wire and second conductive wire according to the acquired sounding position and audio data as a design criterion, which is not described herein.
In an alternative embodiment, the controller of the sound generating means is integrated with the display means. In a specific example, the display device includes a controller that controls signal transmission of the display device, and the controller of the display device can realize functions of the controller of the sound emitting device, and illustratively, the controller of the display device has functions of analyzing an image signal of the display device, determining a sound emitting position according to the analyzed image signal, determining corresponding first conductive lines and second conductive lines according to the sound emitting position, acquiring audio data, and the like.
In another specific example, the controllers of the sound generating devices may also be integrated inside the display device, respectively, and the display device includes an image controller, an audio controller, and a current signal controller, for example. In this example, the controllers 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, so as to determine a sound generating position; the audio controller can acquire audio data; the current signal controller can send current signals to the corresponding first conductive wire and second conductive wire according to the sounding positions, and the values of the current signals can be obtained through audio data.
Therefore, the controller of the embodiment of the disclosure may be an independent unit integrated in the display device, or may be one or more controllers integrated in the display device, which is integrated in the display device, and has 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, where the display panel includes a black matrix unit 21 and a plurality of pixel units 22 arranged in an array on a substrate (not shown in the figure), a projection of the black matrix unit 21 on the substrate corresponds to a projection of an adjacent pixel unit 22 on the substrate at intervals, and the projection of the black matrix unit 21 on the substrate covers the projections of the first conductive line 121 and the second conductive line 122 on the substrate, respectively.
Although the overall thickness of the conductive film is on the nanometer level, in the embodiment of the disclosure, the first conductive line 121 and the second conductive line 122 are disposed at positions corresponding to the black matrix unit, so that the projection of the black matrix unit 21 on the substrate covers the projection of the first conductive line 121 and the second conductive line 122 on the substrate, respectively, and the influence of the conductive film on the display screen can be further reduced, the normal display of the display device is not affected, and 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, where pixel unit positions of corresponding colors are defined by a pixel defining layer, that is, a space is formed between adjacent pixel units by the pixel defining 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 of 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 shielding of the display screen by the first conductive line and the second conductive line.
Further, as shown in fig. 6, the width d of the first conductive line 121 and the width d of the second conductive line 122 are 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 positions corresponding to the black matrix unit 21, the first conductive line 121 and the second conductive line 122 do not occupy a light emitting area due to the excessively large width, 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, the first conductive line and the second conductive line do not occupy and shield the pixel unit, and the display performance of the display system is ensured.
In a specific example, the interval between adjacent pixel units is 20 micrometers, and as shown in fig. 6, the width d of the black matrix unit disposed corresponding to the interval is 20 micrometers, and the widths d of the first and second conductive lines may be set to be less than 20 micrometers, so that good display performance of the display system is achieved.
It should be noted that, the embodiment of the present disclosure does not limit the correspondence between the first conductive line and the black matrix unit, and the embodiment of the present disclosure also does not limit the correspondence 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 each position corresponding to the black matrix, and as illustrated in fig. 6, for example, the first conductive line is not disposed at the interval between the red pixel unit 22R and the green pixel unit 22G, and the first conductive line is not disposed at the interval between the green pixel unit 22G and the blue pixel unit 22B, so that the first conductive line and the second conductive line in the embodiment of the present disclosure are disposed at the interval between the adjacent pixel units, but the first conductive line and the second conductive line are not limited to be disposed at the interval between the adjacent pixel units one by one, which should be performed by one by a person skilled in the art according to practical application.
Another embodiment of the present disclosure provides a display device including the above display panel. The display device may be any product or component with sound production display function, such as electronic paper, mobile phone, tablet computer, television, display, notebook computer, digital photo frame, navigator, MP3, MP4, ultrasonic imaging, distance measuring system, etc., which is not limited in this embodiment. In a specific example, the display device of the embodiment of the disclosure may be an OLED display device or an LCD display device, which is not limited by the structure of the display device and has a wide application range.
According to the display system disclosed by the embodiment of the disclosure, the sounding device is arranged on the light emitting side of the display device, the sounding corresponding to the display picture of the display device is realized by utilizing the thermo-acoustic effect, the working frequency range is larger, the sound field effect is stronger, the positioning precision is high, the whole display system is simple to assemble and convenient to install, the space structure distribution is effectively saved, the screen occupation ratio of the display panel is improved, and the display system has a wide application prospect.
It should be noted that the foregoing examples of the present disclosure are merely illustrative of the present disclosure and not limiting of the embodiments of the present disclosure, and that various other changes and modifications can be made by one skilled in the art based on the foregoing description, and it is not intended to be exhaustive of all embodiments, and all obvious changes and modifications that come within the scope of the present disclosure are intended to be embraced by the technical solution of the present disclosure.
Claims (11)
1. A sound generating 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 emitting side of the display device;
the conductive film includes a plurality of first conductive lines extending in a first direction and a plurality of second conductive lines extending in a second direction;
the controller is used for sending current signals to the first conductive wire and the second conductive wire corresponding to the sounding position according to the sounding position and the audio data, so that the conductive film corresponding to the sounding position generates periodic temperature change, and the conductive film at the sounding position exchanges heat with surrounding media to enable the surrounding media to generate periodic expansion and contraction, and sounding is achieved.
2. The sound emitting device of claim 1, wherein the material of the first conductive wire and the material of the second conductive wire are silver.
3. The sound generating apparatus according to claim 1, wherein two ends of the first conductive wire are correspondingly connected to two first lead-out ends, two ends of the second conductive wire are correspondingly connected to two second lead-out ends, and the controller is respectively connected to the first lead-out ends and the second lead-out ends.
4. The sound emitting device of claim 1, wherein the conductive film further comprises a transparent insulating layer coating the first and second conductive wires.
5. The sound emitting apparatus of claim 4 wherein a projection of the first conductive wire onto the transparent insulating layer intersects a projection of the second conductive wire onto the transparent insulating layer.
6. The sound generating apparatus of claim 5, wherein the first conductive wire and the second conductive wire are layered, and the transparent insulating layer comprises a first transparent insulating layer on a side of the first conductive wire away from the second conductive wire, a second transparent insulating layer between the first conductive wire and the second conductive wire, and a third transparent insulating layer on a side of the second conductive wire away from the first conductive wire.
7. The sound emitting device of claim 6, wherein 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 each greater than the thickness of the first conductive line, and wherein 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 each greater than the thickness of the second conductive line.
8. The sound emitting apparatus of claim 1 wherein the plurality of first conductive wires are equally spaced apart and the plurality of second conductive wires are equally spaced apart.
9. A display system comprising a display device and a sound emitting device according to any one of claims 1-8.
10. The display system according to claim 9, wherein the display device includes a display panel including a black matrix unit and a plurality of pixel units arranged in an array on a substrate, a projection of the black matrix unit on the substrate corresponds to a projection of adjacent pixel units on the substrate at intervals, and projections of the black matrix unit on the substrate cover projections of the first conductive lines and the second conductive lines, respectively.
11. The display system of claim 9, wherein the controller is further configured to determine the sound production location based on audio data and image data of the display device.
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