CN115220596A - Touch sounding display unit and device - Google Patents
Touch sounding display unit and device Download PDFInfo
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- CN115220596A CN115220596A CN202210587376.1A CN202210587376A CN115220596A CN 115220596 A CN115220596 A CN 115220596A CN 202210587376 A CN202210587376 A CN 202210587376A CN 115220596 A CN115220596 A CN 115220596A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
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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
- H04R19/00—Electrostatic transducers
- H04R19/005—Electrostatic transducers using semiconductor materials
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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
- H04R19/00—Electrostatic transducers
- H04R19/02—Loudspeakers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
The invention discloses a touch control sound production display unit and a device, wherein the unit comprises a first base material, a functional area and a second base material which are sequentially stacked from top to bottom, the functional area comprises a touch control area and a sound production area, the touch control area and the sound production area are both positioned between the first base material and the second base material and are arranged at intervals in the horizontal direction, the touch control area and the sound production area share the first base material and the second base material, and the sound production area is an electrostatic ultrasonic transducer. The invention combines the electrostatic ultrasonic transducer with the touch screen, so that the display device can produce sound in a screen orientation mode and can be touched at the same time, the two sides are not interfered with each other, the directional sound production of the screen is realized, the listening privacy is realized, the interference to peripheral personnel is avoided, the touch function is realized, and the application range of the touch device is expanded.
Description
Technical Field
The invention relates to the technical field of directional sounding of screens, in particular to a touch sounding display unit and a touch sounding display device.
Background
The display device is ultra-thin, has a narrow frame, and even is designed in a full screen mode, and the space reserved for the sound production device is smaller and smaller. However, the conventional sound generating device has a large volume and is limited in installation position, and it is difficult to have a suitable position and space in a new generation of display device. Therefore, there is a need to redesign a sound emitting device that can accommodate the requirements of current display devices.
Some manufacturers of display devices design a mode of making sound by using a screen, and the screen sound making technology is taken as a surface audio technology, so that a new solution is provided for the sound of multimedia audio-visual equipment. At present, a transparent screen directional loudspeaker combining a display device and a screen sounding device is under development, the self vibration of a screen is used as the loudspeaker, the resonant cavity space of the traditional loudspeaker is saved, and meanwhile, the directional propagation characteristic meets the privacy requirement of personal electronic equipment and the non-interfering requirement of public equipment.
The touch panel can recognize a touch point input by a human hand or a separate input unit and transmit information corresponding thereto to an upper display device. The touch panel is classified into a resistive type, a capacitive type, and an infrared sensing type according to a contact sensing method of the touch panel. A capacitive type touch panel is currently receiving much attention because of its easy manufacturing method and strong sensing force.
How to combine the directional sounding of screen and touch-control function, make the display can integrate screen directional sounding, show and touch-control etc. multi-functional in an organic whole, and two kinds of functions mutual noninterference is the problem that needs to solve at present.
The invention content is as follows:
the invention aims to provide a touch sounding display unit and a device which can simultaneously realize a touch function and a screen directional sounding function.
In order to achieve the above object, in one aspect, the present invention provides a touch sound display unit, which includes a first substrate, a functional area, and a second substrate, which are sequentially stacked from top to bottom, wherein the functional area includes a touch area and a sound area, the touch area and the sound area are both located between the first substrate and the second substrate, and are horizontally spaced, the touch area and the sound area share the first substrate and the second substrate, and the sound area is an electrostatic ultrasonic transducer.
In a preferred embodiment, the electrostatic ultrasonic transducer includes a first electrode, a second electrode and a microstructure, the first electrode is formed on a portion of a lower end surface of the first substrate opposite to the second substrate, the second electrode is formed on a portion of an upper end surface of the second substrate opposite to the first substrate, the microstructure is formed between the first electrode and the second electrode and is used for providing an air gap required by the sound generation layer to generate sound through vibration, and outer edges of the first substrate and the second substrate located in the sound generation area are in frame fit.
In a preferred embodiment, the first electrode includes a first conductive layer and a first edge conductive layer, the second electrode includes a second conductive layer and a second edge conductive layer, the first conductive layer is formed on a portion of the lower end surface of the first substrate opposite to the second substrate, and the first edge conductive layer is formed on an edge of the first conductive layer on at least one side of the sound-emitting region; the second conducting layer is formed on the upper end face of the part, opposite to the first base material, of the second base material, and the second edge conducting layer is formed on the edge, located on at least one side of the sound-emitting area, of the second conducting layer.
In a preferred embodiment, the electrostatic ultrasonic transducer further includes an insulating layer, the insulating layer includes a first insulating layer and a first edge insulating layer, the first insulating layer is formed on a portion of the upper end surface of the second substrate opposite to the first substrate and covers at least the second conductive layer and the second edge conductive layer, the microstructure is formed on the first insulating layer, and the first edge insulating layer is formed on a portion of the lower end surface of the first substrate opposite to the second substrate and covers at least the first edge conductive layer.
In a preferred embodiment, the touch area includes a third conductive layer and a fourth conductive layer, the third conductive layer is formed on a portion of the lower end surface of the first substrate opposite to the second substrate, and is spaced from the first conductive layer; the fourth conductive layer is formed on the upper end surface of the part, opposite to the first substrate, of the second substrate and is arranged at intervals with the first conductive layer.
In a preferred embodiment, the third conductive layer is flush with the lower end face of the first conductive layer, and the third conductive layer and the first conductive layer are insulated and spaced by a first spacer; the fourth conducting layer is flush with the lower end face of the second conducting layer, and the fourth conducting layer and the second conducting layer are insulated and spaced by a second spacer region.
Preferably, the third conductive layer and the fourth conductive layer are adhered to each other by glue, and the thickness of the glue is the same as that of the first conductive layer and the second conductive layer.
Preferably, the sheet resistance of the third conductive layer is higher than that of the first conductive layer, and the sheet resistance of the fourth conductive layer is higher than that of the second conductive layer.
Preferably, the first conductive layer and the second conductive layer are made of conductive materials with the resistance of 10 ohm or less, and the third conductive layer and the fourth conductive layer are made of conductive materials with the resistance of 100 ohm to 150 ohm or less.
Preferably, first substrate and second substrate are the PET membrane, the thickness of first substrate is 20um ~ 25um, and the thickness of second substrate is 50um ~ 55um, the width of first spacer region and second spacer region is below 20um, and its width is narrower, and visual effect is better.
On the other hand, the invention provides a touch sounding display device, which comprises at least one touch sounding display unit or a plurality of spliced touch sounding display units.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the electrostatic ultrasonic transducer is combined with the touch screen, so that the display device can directionally sound on the screen and touch on the screen, and the two sides are not interfered with each other, so that the directional sound of the screen is realized, the listening is private, the interference to surrounding personnel is avoided, and meanwhile, the display device has a touch function, the application range of the display device is expanded, and the display device can be used for automobiles.
2. The invention uses two layers of substrate layers, combines with corresponding preparation process and the matching of different material parameters, so that the formed display device can reach 70-80 db at audible sound pressure level of 1 KHz.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a touch-sensitive sound-emitting display unit according to the present invention;
fig. 2 is a schematic structural diagram of a touch-sensing sound-emitting display unit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a sounding layer according to an embodiment of the present invention;
FIG. 4 is a schematic view of a partition structure of a touch-sensitive sound-emitting display device (having a touch-sensitive sound-emitting display unit) according to the present invention;
FIG. 5 is a schematic view of a partition structure of a touch-sensitive sound-emitting display device (having two split touch-sensitive sound-emitting display units) according to the present invention;
FIG. 6 is a schematic flow chart of the manufacturing process of the present invention.
The reference signs are:
1. the touch panel comprises a first substrate, 2, a sound emitting area, 21, a first electrode, 211, a first conductive layer, 212, a first edge conductive layer, 22, a second electrode, 221, a second conductive layer, 222, a second edge conductive layer, 23, a microstructure, 24, an insulating layer, 241, a first insulating layer, 242, a first edge insulating layer, 3, a touch area, 31, a third conductive layer, 32, a fourth conductive layer, 4, a second substrate, 5, a first spacing area, 6, a second spacing area, 7, an edge fixing area, 8 and colloid.
The specific implementation mode is as follows:
the following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations such as "comprises" or "comprising", etc., will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
According to the touch sounding display unit and device disclosed by the invention, the electrostatic ultrasonic transducer is combined with the touch screen, so that the display device can directionally sound on the screen and touch on the screen, and the two sides are not interfered with each other, so that the touch sounding display unit has a touch function while realizing directional sounding on the screen, listening privacy and avoiding interference on surrounding personnel, and the application range of the touch sounding display unit is expanded, for example, the touch sounding display unit can be used for automobiles.
As shown in fig. 1, a touch sounding display unit disclosed in the embodiment of the present invention includes a first substrate 1, a functional area, and a second substrate 4 sequentially stacked from top to bottom, where the functional area includes a sounding area 2 and a touch area 3 that are disposed at an interval, that is, the first substrate 1, the functional area, and the second substrate 4 cooperate to form a sounding unit while being a touch unit, so that the display screen can perform touch display and also can directionally sound without interfering with each other.
Specifically, the first substrate 1 is located on the uppermost layer, and may be made of a PET material commonly used in the field of touch control, or may be a CPI (transparent polyimide film)/PI (polyimide film)/UTG (Ultra-Thin Glass), where the lower the thickness of the first substrate 1, the higher the sound emission efficiency. The preferred thickness can be 6um to 50um, with typical thicknesses of 6um, 12um, 21um, 23um, 25um, or 50um. The second substrate 4 is located the lowermost layer, also can select for use PET material or glass that the touch-control field is commonly used, and the thickness of commonly using is 50um.
Referring to fig. 2 and 3, the touch area 3 and the sound generating area 2 are located between the first substrate 1 and the second substrate 4, and the two are arranged at left and right intervals, wherein the sound generating area 2 employs an electrostatic ultrasonic transducer, which specifically includes a first electrode 21, a second electrode 22, a microstructure 23, and an insulating layer 24, wherein the first electrode 21 includes a first conductive layer 211 and a first edge conductive layer 212, and the touch area 3 includes a third conductive layer 31 and a fourth conductive layer 32, wherein the third conductive layer 31 and the first conductive layer 211 are both formed on a lower end surface of the first substrate 1 and respectively located on left and right sides of the lower end surface of the first substrate 1, and the two are separated by a first spacer 5. During preparation, firstly plating a conducting layer on the left half of the lower end face of the first substrate 1, then plating a conducting layer on the right half of the lower end face of the first substrate 1, and then etching or photoetching a first spacing area 5 in the middle area of the conducting layers on the two sides, wherein the first spacing area 5 is a conducting layer-free area, so that the conducting layer on the left forms the third conducting layer 31, and the conducting layer on the right forms the first conducting layer 211. In addition, a sheet coating can also be adopted, and the method specifically comprises the following steps: first, the lower end surface of the first base 1 is coated with a region of the third conductive layer 31 (it is needless to say that the region coated with the first conductive layer 211 may be coated in any order), then the region coated with the first conductive layer 211 is coated with a conductive layer to form the first conductive layer 211, and then the coated region is torn off, the target is replaced, and the conductive layer in the other region (i.e., the region coated with the third conductive layer 31) is coated.
Since the sheet resistance of the conductive layer required for touch control is different from the sheet resistance of the conductive layer required for sound generation, the sheet resistances of the third conductive layer 31 and the first conductive layer 211 are preferably set to be different, and the sheet resistance of the third conductive layer 31 is preferably greater than the sheet resistance of the first conductive layer 211. When the conductive layer is plated in this way, coil plating, that is, plating of the conductive layer of the same sheet resistance on the entire lower end surface of the first base material 1, may be performed. Here, as the sheet resistance of the conductive layer of the sound emission region 2 (i.e., the first conductive layer 211 here) is lower, it is more advantageous to increase the sound emission efficiency, and a conductive material of 10 ohm or less is preferably used.
The first edge conductive layer 212 is formed at least at an edge of the first conductive layer 211, that is, it may be provided only one turn around an outer edge of the first conductive layer 211 (except for an edge adjacent to one side of the left first spacer 5). Here, the right half of the first substrate 1, the first conductive layer 211, and the first edge conductive layer 212 constitute a vibration layer of the sound emitting unit.
The second electrode 22 includes a second conductive layer 221 and a second edge conductive layer 222, and the fourth conductive layer 32 and the second conductive layer 221 are both formed on the upper end surface of the second substrate 4 and respectively located on the left and right sides of the upper end surface of the second substrate 4, and are separated by the second separation region 6. The same as the preparation process of the fourth conductive layer 32 and the second conductive layer 221, during the preparation, the left half of the upper end surface of the second substrate 4 is plated with the conductive layer first, then the right half of the upper end surface of the second substrate 4 is plated with the conductive layer, then the second isolation region 6 is etched or photoetched in the middle area of the two conductive layers, the second isolation region 6 is the region without the conductive layer, thus, the fourth conductive layer 32 is formed on the conductive layer on the left, and the second conductive layer 221 is formed on the conductive layer on the right. In addition, a sheet coating can also be adopted, and the method specifically comprises the following steps: the upper end surface of the second base 4 is coated with a region of the fourth conductive layer 32 (needless to say, the order of coating the region coated with the second conductive layer 221 is not limited), then the region coated with the second conductive layer 221 is coated with the conductive layer to form the second conductive layer 221, and then the coated region is torn off, the target is replaced, and the conductive layer of the other region (i.e., the fourth conductive layer 32) is coated. When the device is implemented, the width of the first interval area and the width of the second interval area are less than 20um, and the thickness of the colloid 8 is less than 25um
Similarly, since the sheet resistance of the conductive layer required for touch control is different from the sheet resistance of the conductive layer required for sound generation, the sheet resistances of the fourth conductive layer 32 and the second conductive layer 221 are preferably not the same, and the sheet resistance of the fourth conductive layer 32 is preferably greater than the sheet resistance of the second conductive layer 221. When the conductive layer is plated in this way, coil plating, that is, plating of the conductive layer of the same sheet resistance on the entire upper end surface of the second base 4 can be performed. Here, as the sheet resistance of the conductive layer of the sound emission region (i.e., here, the second conductive layer 221) is lower, it is more advantageous to increase the sound emission efficiency, and a conductive material of 10 ohm or less is preferably used.
The second edge conductive layer 212 is formed at least at an edge of the second conductive layer 221, that is, it may be provided with the second edge conductive layer 222 only around an outer edge of the second conductive layer 221 (except for an edge adjacent to one side of the left second spaced region 6).
The insulating layer 24 specifically includes a first insulating layer 241 and a first edge insulating layer 242, wherein the first insulating layer 241 is formed on the upper end surface of the second substrate 4 opposite to the first substrate 1 and at least covers the second conductive layer 221 and the second edge conductive layer 222, and in this embodiment, the first insulating layer 241 covers the second conductive layer 221 and the second edge conductive layer 222. The first edge insulating layer 242 is formed on the lower end surface of the first substrate 1 opposite to the second substrate 4 and covers at least the first edge conductive layer 212. In this embodiment, the first edge insulating layer 242 covers the first edge conductive layer 212. In other embodiments, the insulating layer may have other alternative structures, for example, the insulating layer may be disposed on the entire lower end surface of the first substrate 1 and the entire upper end surface of the second substrate 4, or only the edge insulating layer covering the first edge conductive layer 242 may be disposed on the upper end surface of the second substrate 4, so long as the insulation between the first conductive layer 211 and the second conductive layer 221 can be achieved. In practice, the thickness of the first insulating layer 241 may be 5 to 15um.
The microstructures 23 are disposed between the first conductive layer 211 and the second conductive layer 221, and may be disposed on the lower end surface of the first substrate 1 or the upper end surface of the second substrate 4, and when disposed on the upper end surface of the second substrate 4, specifically, disposed on the upper end surface of the first insulating layer 241. In practice, it is preferably provided on the upper end surface of the first insulating layer 241. In practice, the thickness of the microstructure 23 can be 12um to 18um, and the size can be 80um to 100um.
The second substrate 4, the second conductive layer 221, the second edge conductive layer 222, the first insulating layer 241, and the microstructures 23 form a non-vibration layer of the sound generating unit. The vibration layer and the non-vibration layer of the sound generating unit are bonded by a frame, specifically, the lower end face of the first conductive layer 211 and the upper end face of the first insulating layer 241 are bonded by a frame, in this embodiment, an edge fixing area 7 is arranged on the outer edge of the first insulating layer 241, the edge fixing area 7 specifically includes a fixed area (not shown) located on the outer side and a non-fixed area (not shown) located on the inner side, wherein the fixed area may be a double-sided adhesive tape, and the non-fixed area may be a silica gel or a UV adhesive tape.
In addition, use colloid 8 to laminate completely between above-mentioned third conducting layer 31 and the fourth conducting layer 32, the thickness of colloid 8 is preferred to be equal with between first conducting layer 211 and the second conducting layer 221 to height between two districts about can balancing, two subregion height matchings are favorable to the visual zone roughness of display element to maximize about, can guarantee the sound production efficiency maximize simultaneously. In the case of the gel 8, the thickness is 30um or less, preferably 25 to 30um.
In practice, the first conductive layer 211 and the second conductive layer 221 may preferably be made of a superconducting material, and a conductive material having a resistivity of 10 ohms or less is preferable as the sheet resistance is lower to improve the sound emission efficiency. The third conductive layer 31 and the fourth conductive layer 32 may be made of a conductive material having a sheet resistance of 100 to 150 ohms, and a conductive material having a sheet resistance of 150 ohms or 100 ohms is generally used.
In addition, in the above scheme, the first substrate 1, the touch area 3, the sound generating area 2 and the second substrate 4 are matched to form a half of the touch unit and a half of the sound generating unit. That is to say, the touch-control unit is located the left side, and the sound generating unit is located the right, and half the left side that the touch-control sound production display element that forms integratively like this is the touch-control part, and half the right is the sound generating part, and two parts are the looks interval setting about, can realize that two parts function is independent and mutual noninterference.
In one embodiment, the first substrate 1 is made of a PET material with a thickness of 23um, the first conductive layer 211 and the second conductive layer 221 with a matching sheet resistance of 10 ohms, the microstructure 23 with a thickness of 12um to 18um and 80um to 100um, and the first insulating layer 241 with a thickness of 5um to 15um, and the sound pressure can reach 70 db to 80db at 1 kHz.
With reference to fig. 4 and 5, the present invention further provides a touch-control sound-emitting display device, which includes at least one touch-control sound-emitting display unit, where one display unit can be half touch-controlled and half sound-emitting. The touch control sound production display unit can also comprise a plurality of spliced touch control sound production display units, a plurality of touch control areas and a plurality of sound production areas can be formed after splicing, and the number and the splicing mode of the touch control sound production display units can be selected according to needs. When the unit is used on an automobile, a touch sounding display unit can be arranged on a main driver, and display units can be arranged on a subsidiary driver and a rear seat respectively, so that touch control and sounding can be realized for each seat.
On the other hand, as shown in fig. 6, the process for manufacturing a touch-control sound-emitting display unit disclosed by the invention comprises the following steps:
the method comprises the steps of S1, forming a third conducting layer and a first conducting layer which are insulated and spaced from each other on the lower end face of a first base material, then forming a first edge conducting layer on the edge of the first conducting layer, then forming a first edge insulating layer on the first edge conducting layer, and enabling the first base material, the first conducting layer and the first edge conducting layer to form a vibration layer of a sounding unit.
In this embodiment, a conducting layer is first half-plated on the left side of the lower end surface of the first substrate 1, then a conducting layer is half-plated on the right side of the lower end surface of the first substrate 1, and then a first spacer 5 is etched or photo-etched in the middle region of the conducting layers on both sides, where the first spacer 5 is a region without a conducting layer, so that the conducting layer on the left side forms the third conducting layer 31, and the conducting layer on the right side forms the first conducting layer 211. In addition, a sheet coating can also be adopted, and the method specifically comprises the following steps: after the third conductive layer 31 is first coated on the lower end surface of the first substrate 1 (the first conductive layer 211 may be coated, the procedure is not limited), the first conductive layer 211 is formed by coating the first conductive layer 211 on the first conductive layer 211, and the target is removed and replaced to coat the second conductive layer (i.e., the third conductive layer 31). And then, forming a first edge conductive layer at the edge of the first conductive layer.
S2, forming a fourth conducting layer and a second conducting layer which are insulated and spaced from each other on the upper end face of a second substrate, then forming a second edge conducting layer on the edge of the second conducting layer, then forming a first insulating layer on the whole surface of the second conducting layer, and then forming a microstructure on the upper end face of the first insulating layer, wherein the second substrate, the second conducting layer, the second edge conducting layer, the first insulating layer and the microstructure form a non-vibration layer of the sound generating unit.
Specifically, in this embodiment, as in the process of forming the conductive layer on the first substrate, during the preparation, the left half of the upper end surface of the second substrate 4 is first plated with the conductive layer, then the right half of the upper end surface of the second substrate 4 is plated with the conductive layer, and then the second isolation region 6 is etched or photo-etched in the middle region of the two conductive layers, where the second isolation region 6 is a region without the conductive layer, so that the fourth conductive layer 32 is formed on the conductive layer on the left, and the second conductive layer 221 is formed on the conductive layer on the right. In addition, a sheet coating can also be adopted, and the method specifically comprises the following steps: after the area of the second base 4 on which the fourth conductive layer 32 is plated is coated (naturally, the area of the second conductive layer 221 is coated, and the order is not limited), the area of the second conductive layer 221 is coated with the conductive layer to form the second conductive layer 221, and then the coated area is torn off, the target is replaced, and the conductive layer of the other area (that is, the fourth conductive layer 32 is coated) is coated to form the fourth conductive layer 32. Then, the second edge conductive layer 212 is formed on the edge of the second conductive layer 221, then the first insulating layer 241 covering the second edge conductive layer 212 and the second conductive layer 221 is formed on the second conductive layer 221, and then the microstructure 23 is formed on the first insulating layer 241.
And S3, fully laminating the third conducting layer and the fourth conducting layer, performing frame lamination on the vibrating layer and the non-vibrating layer, and forming a touch unit and a sound unit on one side of the manufactured touch sound display unit after lamination.
Specifically, in this embodiment, the third conductive layer 31 and the fourth conductive layer 32 are fully bonded using the adhesive 8, and the thickness of the adhesive 8 is preferably equal to the thickness between the first conductive layer 211 and the second conductive layer 221. The vibrating layer and the non-vibrating layer of the sounding unit are attached by a frame, specifically, the lower end face of the first conductive layer 211 and the upper end face of the first insulating layer 241 are attached by a frame, so that an air gap required by vibration of the vibrating layer is formed between the vibrating layer and the non-vibrating layer.
Preferably, when the first substrate and the second substrate are bonded, a heating tensioning process or a jig tensioning process may be used for tensioning bonding. The specific tensioning process may refer to the description in the application No. CN202210469615.3, entitled vibration layer tensioning process of directional sounding display screen, which is not described herein again.
The invention has the advantages that 1, the electrostatic ultrasonic transducer is combined with the touch screen, so that the display device can produce sound in a directional mode on the screen and touch on the screen, the two sides are not interfered with each other, the directional sound production on the screen is realized, the listening privacy is realized, the interference to surrounding personnel is avoided, the touch function is realized, the application range is expanded, and the display device can be used for automobiles. 3. The invention uses two layers of substrate layers, combines with corresponding preparation process and the matching of different material parameters, so that the formed display device can reach 70-80 db at audible sound pressure level of 1 KHz.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. A touch control sound production display unit is characterized by comprising a first base material, a functional area and a second base material which are sequentially stacked from top to bottom, wherein the functional area comprises a touch control area and a sound production area, the touch control area and the sound production area are both positioned between the first base material and the second base material and are arranged at intervals in the horizontal direction, the touch control area and the sound production area share the first base material and the second base material, and the sound production area is an electrostatic ultrasonic transducer.
2. The touch-control sound-generating display unit according to claim 1, wherein the electrostatic ultrasonic transducer comprises a first electrode, a second electrode and a microstructure, the first electrode is formed on a portion of a lower end surface of the first substrate opposite to the second substrate, the second electrode is formed on a portion of an upper end surface of the second substrate opposite to the first substrate, the microstructure is formed between the first electrode and the second electrode and used for providing an air gap required for the sound generating layer to generate sound by vibration, and outer edges of the first substrate and the second substrate located in the sound generating area are subjected to frame joint.
3. The touch-sensitive sound-emitting display unit according to claim 2, wherein the first electrode comprises a first conductive layer and a first edge conductive layer, the second electrode comprises a second conductive layer and a second edge conductive layer, the first conductive layer is formed on a portion of a lower end surface of the first substrate opposite to the second substrate, and the first edge conductive layer is formed on an edge of the first conductive layer located on at least one side of the sound-emitting area; the second conducting layer is formed on the upper end face of the part, opposite to the first base material, of the second base material, and the second edge conducting layer is formed on the edge, located on at least one side of the sound-emitting area, of the second conducting layer.
4. A touch-sensitive sound-emitting display unit according to claim 3, wherein the electrostatic ultrasonic transducer further comprises an insulating layer, the insulating layer comprises a first insulating layer and a first edge insulating layer, the first insulating layer is formed on the upper end surface of the portion of the second substrate opposite to the first substrate and covers at least the second conductive layer and the second edge conductive layer, the microstructure is formed on the first insulating layer, and the first edge insulating layer is formed on the lower end surface of the portion of the first substrate opposite to the second substrate and covers at least the first edge conductive layer.
5. A touch-sensitive sound-emitting display unit according to claim 3, wherein the touch-sensitive area comprises a third conductive layer and a fourth conductive layer, the third conductive layer is formed on a part of the lower end surface of the first substrate opposite to the second substrate and is spaced from the first conductive layer in the horizontal direction; the fourth conductive layer is formed on the upper end surface of the part, opposite to the first base material, of the second base material and is arranged at an interval with the first conductive layer in the horizontal direction.
6. The touch-control sound-emitting display unit according to claim 5, wherein the third conductive layer is flush with the lower end face of the first conductive layer, and the third conductive layer and the first conductive layer are insulated and spaced by a first spacer; the fourth conducting layer is flush with the lower end face of the second conducting layer, and the fourth conducting layer and the second conducting layer are insulated and spaced through a second spacing area.
7. A touch-control sound-emitting display unit according to claim 6, wherein the third conductive layer and the fourth conductive layer are adhered by glue, and the thickness of the glue is the same as that between the first conductive layer and the second conductive layer.
8. The touch-sensitive sound-emitting display unit according to claim 5, wherein the sheet resistance of the third conductive layer is higher than that of the first conductive layer, and the sheet resistance of the fourth conductive layer is higher than that of the second conductive layer.
9. The touch-control sound-production display unit of claim 7, wherein the first substrate and the second substrate are both PET films, the thickness of the first substrate is 20 um-25 um, the thickness of the second substrate is 50 um-55 um, the width of the first spacer region and the width of the second spacer region are less than 20um, and the thickness of the colloid is less than 30um.
10. A touch sound display device, comprising at least one touch sound display unit according to any one of claims 1 to 9 or a plurality of spliced touch sound display units according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210587376.1A CN115220596B (en) | 2022-05-25 | 2022-05-25 | Touch sounding display unit and device |
| PCT/CN2023/093239 WO2023226763A1 (en) | 2022-05-25 | 2023-05-10 | Touch sound production display unit and device |
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| CN202210587376.1A CN115220596B (en) | 2022-05-25 | 2022-05-25 | Touch sounding display unit and device |
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| CN115220596B CN115220596B (en) | 2023-12-08 |
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