WO2023226763A1 - 一种触控发声显示单元及装置 - Google Patents

一种触控发声显示单元及装置 Download PDF

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Publication number
WO2023226763A1
WO2023226763A1 PCT/CN2023/093239 CN2023093239W WO2023226763A1 WO 2023226763 A1 WO2023226763 A1 WO 2023226763A1 CN 2023093239 W CN2023093239 W CN 2023093239W WO 2023226763 A1 WO2023226763 A1 WO 2023226763A1
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WO
WIPO (PCT)
Prior art keywords
conductive layer
base material
touch
sound
area
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Application number
PCT/CN2023/093239
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English (en)
French (fr)
Inventor
胡亚云
匡正
毛峻伟
Original Assignee
苏州清听声学科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from CN202210577959.6A external-priority patent/CN115220594A/zh
Priority claimed from CN202210587376.1A external-priority patent/CN115220596B/zh
Application filed by 苏州清听声学科技有限公司 filed Critical 苏州清听声学科技有限公司
Publication of WO2023226763A1 publication Critical patent/WO2023226763A1/zh

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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

Definitions

  • the present invention relates to the technical field of screen directional sound generation, and in particular to a touch-control sound generation display unit and device.
  • Some display device manufacturers have designed a way to use the screen to produce sound.
  • screen sound technology provides a new solution for the sound of multimedia audio-visual equipment.
  • a transparent screen directional speaker that combines a display device with a screen sound device is being developed. It uses the vibration of the screen itself as a speaker, saving the resonant cavity space of traditional speakers.
  • the directional propagation characteristics meet the privacy requirements of personal electronic devices. and non-interference requirements for public equipment.
  • the touch panel can recognize touch points input by human hands or a separate input unit and transmit corresponding information to the upper display device.
  • the touch panel is divided into resistive type, capacitive type and infrared sensing type. Capacitive touch panels are currently receiving widespread attention due to their easy manufacturing method and strong sensing power.
  • the object of the present invention is to provide a touch-control sound-emitting display unit and device that can simultaneously realize the touch-control function and the screen-directional sound-emitting function.
  • the present invention proposes a touch-controlled sound display unit.
  • the unit includes a first base material, a functional area and a second base material that are stacked in sequence from top to bottom.
  • the functional area includes A touch area and a sound area, the touch area and the sound area are located between the first base material and the second base material, and the two are spaced apart in the horizontal direction, the touch area and the
  • the sound-emitting area shares the first base material and the second base material, and the sound-emitting area is an electrostatic ultrasonic transducer.
  • the electrostatic ultrasonic transducer includes a first electrode, a second electrode and a microstructure, and the first electrode is formed on the lower end surface of the opposite part of the first base material and the second base material, The second electrode is formed on the upper end surface of the part of the second base material that is opposite to the first base material.
  • the microstructure is formed between the first electrode and the second electrode to provide the sound generation layer with the vibration and sound requirements. There is an air gap, and the outer edges of the first base material and the second base material located in the sound-generating area are frame-fitted.
  • 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
  • the first edge conductive layer is formed on the edge of at least one side of the first conductive layer located in the sound-generating area
  • the second conductive layer is formed on the second base material and the second base material.
  • the second edge conductive layer is formed on the edge of at least one side of the second conductive layer located in the sound generating area.
  • 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 between the second base material and the third edge insulating layer.
  • the upper end surface of the opposite part of a substrate at least covers 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 base material opposite to the second base material and at least covers the first edge conductive layer.
  • the touch area includes a third conductive layer and a fourth conductive layer
  • the third conductive layer is formed on the lower end surface of the part opposite to the first base material and the second base material, and is connected with the first base material and the second base material.
  • the first conductive layers are spaced apart from each other; the fourth conductive layer is formed on the upper end surface of the part of the second base material that is opposite to the first base material, and is spaced apart from the first conductive layer.
  • the lower end surfaces of the third conductive layer and the first conductive layer are flush with each other, and the two are insulated and separated by a first spacing region; the fourth conductive layer and the second conductive layer The lower end surfaces of the two are flush, and the two are insulated and separated by a second spacing area.
  • the third conductive layer and the fourth conductive layer are bonded by colloid glue, and the thickness of the colloid is the same as the thickness between the first conductive layer and the second conductive layer.
  • the sheet resistance of the third conductive layer is higher than the sheet resistance of the first conductive layer
  • the sheet resistance of the fourth conductive layer is higher than the sheet resistance of the second conductive layer
  • the first conductive layer and the second conductive layer use conductive materials with an ohm or less
  • the third conductive layer and the fourth conductive layer use a conductive material with an ohm or less of 100 ohms to 150 ohms.
  • both the first base material and the second base material are PET films
  • the thickness of the first base material is 20um-25um
  • the thickness of the second base material is 50um-55um
  • the first spacer area and The width of the second interval is less than 20um. The narrower the width, the better the visualization effect.
  • the present invention proposes a touch-controlled sound-generating display device, which includes at least one of the above-mentioned touch-controlled sound-generating display units or a plurality of spliced above-mentioned touch-controlled sound-generating display units.
  • the present invention has the following beneficial effects:
  • the present invention combines an electrostatic ultrasonic transducer with a touch screen, so that one side of the display device can The screen emits directional sound, one side can be touched, and the two sides do not interfere with each other. While achieving directional sound on the screen, allowing private listening and avoiding interference to surrounding people, it also has a touch function, expanding its application scope and can be used in automobiles. .
  • the present invention uses two base material layers, combined with corresponding preparation processes and different material parameters, so that the audible sound pressure level of the formed display device can reach 70-80db at 1KHz.
  • Figure 1 is a schematic structural diagram of a touch sound display unit of the present invention
  • Figure 2 is a schematic structural diagram of a touch sound display unit in an embodiment of the present invention.
  • Figure 3 is a schematic structural diagram of the sound-emitting layer in an embodiment of the present invention.
  • Figure 4 is a schematic diagram of the partition structure of a touch-controlled sound-generating display device (having a touch-controlled sound-generating display unit) according to the present invention
  • Figure 5 is a schematic diagram of the partition structure of the touch-controlled sound-generating display device (having two spliced touch-controlled sound-generating display units) of the present invention
  • Figure 6 is a schematic flow diagram of the preparation process of the present invention.
  • First substrate 2. Sound-emitting area, 21.
  • First electrode 211.
  • First conductive layer 212.
  • First edge conductive layer 22.
  • Second electrode 221.
  • Second conductive layer 222.
  • Second Edge conductive layer 23.
  • Microstructure 24.
  • Insulating layer 241.
  • First edge insulating layer 3. Touch area, 31.
  • Fourth conductive layer, 4 the second base material, 5. the first spacer area, 6. the second spacer area, 7. edge fixation area, 8. colloid.
  • the present invention discloses a touch-controlled sound-producing display unit and device that combines an electrostatic ultrasonic transducer with a touch screen, so that one side of the display device can produce screen-oriented sound and the other side can be touched, without interfering with each other on both sides. It achieves directional sound generation on the screen, allowing private listening and avoiding interference to surrounding people. It also has a touch function, expanding its application scope, such as being used in cars.
  • a touch-controlled sound display unit disclosed in an embodiment of the present invention includes a first substrate 1, a functional area and a second substrate 4 that are stacked in sequence from top to bottom.
  • the functional area includes spaced
  • the sound-generating area 2 and the touch-control area 3 are set, that is to say, the first base material 1, the functional area and the second base material 4 cooperate to form a touch unit on one side and a sound-generating unit on the other side, so that the display screen can be displayed in a touch-controlled manner. It can also produce directional sounds without interfering with each other.
  • the first substrate 1 is located on the top layer, and can be made of PET material commonly used in the touch field, or CPI (transparent polyimide film)/PI (polyimide film)/UTG (Ultra-Thin Glass) : ultra-thin glass), the lower the thickness of the first substrate 1, the higher the sound generation efficiency.
  • the preferred thickness can be 6um to 50um, and the commonly used thicknesses are 6um, 12um, 21um, 23um, 25um or 50um.
  • the second substrate 4 is located at the bottom layer, and can also be made of PET material or glass commonly used in the touch field, with a common thickness of 50um.
  • the touch area 3 and the sound-emitting area 2 are located between the first base material 1 and the second base material 4, and are spaced left and right.
  • the sound-emitting area 2 uses electrostatic ultrasonic transduction.
  • the body 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 the lower end surface of the first base material 1, and are respectively located on the left and right sides of the lower end surface of the first base material 1.
  • first spacer area 5 a conductive layer is first plated on the left half of the lower end surface of the first substrate 1, then a conductive layer is plated on the right half of the lower end surface of the first substrate 1, and then the middle area of the conductive layers on both sides is etched or
  • the first spacer area 5 is photolithographed, and the first spacer area 5 is a conductive layer-free area. In this way, the conductive layer on the left forms the third conductive layer 31, and the conductive layer on the right forms the first conductive layer 211.
  • sheet coating can also be used.
  • the area where the third conductive layer 31 is plated is first coated on the lower end surface of the first substrate 1 (of course, the area where the first conductive layer 211 is plated can also be coated. The order is not the same. limit), then plate a conductive layer in the area where the first conductive layer 211 is plated to form the first conductive layer 211, then tear off the film-coated area, replace the target material, and plate the conductive layer in another area (ie, plate the third conductive layer 31) .
  • the area resistance of the conductive layer required for touch control is different from the area resistance of the conductive layer required for sound generation, preferably, the area resistance of the third conductive layer 31 and the first conductive layer 211 are set inconsistently.
  • the sheet resistance of the layer 31 is greater than the sheet resistance of the first conductive layer 211.
  • the touch control is compatible with low-resistance materials, the sheet resistance of the third conductive layer 31 and the sheet resistance of the first conductive layer 211 can also be selected to be the same.
  • coil plating can be performed, that is, the lower end surface of the first substrate 1 is entirely plated with a conductive layer of the same square resistance.
  • the lower the square resistance of the conductive layer of the sound-generating area 2 (that is, the first conductive layer 211 here) is conducive to increasing the sound-generating efficiency, it is preferable to use a conductive material below 10 ohms.
  • the first edge conductive layer 212 is formed at least on the edge of the first conductive layer 211 , that is, it may only surround the outer edge of the first conductive layer 211 (except for the one adjacent to one side of the left first spacer 5
  • the first edge conductive layer 212 is arranged around the edge).
  • the right half of the first base material 1 The first conductive layer 211 and the first edge conductive layer 212 constitute the vibration layer of the sound generating unit.
  • the second electrode 22 includes a second conductive layer 221 and a second edge conductive layer 222.
  • 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 are respectively located on the second substrate 4. The left and right sides of the upper end surface are separated by a second separation area 6 .
  • the preparation process of the fourth conductive layer 32 and the second conductive layer 221 is the same. During preparation, the conductive layer is first plated on the left half of the upper end surface of the second base material 4, and then the conductive layer is plated on the upper end surface of the second base material 4. The right half is plated with a conductive layer, and then a second spacer area 6 is etched or photo-etched in the middle area of the conductive layers on both sides.
  • the second spacer area 6 is the area without a conductive layer.
  • the conductive layer on the left forms the fourth conductive layer.
  • the conductive layer on the right forms the second conductive layer 221.
  • sheet coating can also be used.
  • the area where the fourth conductive layer 32 is plated is first coated on the upper end surface of the second substrate 4 (of course, the area where the second conductive layer 221 is plated can also be coated. The order is not the same.
  • a conductive layer is plated in the area where the second conductive layer 221 is plated to form the second conductive layer 221, and then the film-coated area is torn apart, the target material is replaced, and the conductive layer in another area (ie, the fourth conductive layer 32 is plated) .
  • the width of the first spacer area and the second spacer area is less than 20um, and the thickness of the colloid 8 is less than 25um.
  • the area resistance of the conductive layer required for touch control is different from the area resistance of the conductive layer required for sound generation, it is preferred that the area resistance of the fourth conductive layer 32 and the second conductive layer 221 be set inconsistently.
  • the sheet resistance of the fourth conductive layer 32 is greater than the sheet resistance of the second conductive layer 221.
  • the touch control is compatible with low-resistance materials
  • the sheet resistance of the fourth conductive layer 32 and the sheet resistance of the second conductive layer 221 can also be selected to be the same. .
  • coil plating can be performed, that is, the upper end surface of the second substrate 4 is entirely plated with a conductive layer of the same square resistance.
  • the lower the sheet resistance of the conductive layer in the sound-generating area ie, the second conductive layer 221 here
  • the second edge conductive layer 212 is formed at least on the edge of the second conductive layer 221, that is, it
  • the second edge conductive layer 222 may be disposed only around the outer edge of the second conductive layer 221 (except for the edge adjacent to one side of the left second spacer 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 241 . layer 221 and the second edge conductive layer 222. 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 at least covers the first edge conductive layer 212 . In this embodiment, the first edge insulating layer 242 covers the first edge conductive layer 212 along its edge.
  • the insulating layer may also have other alternative structures.
  • the insulating layer may be disposed evenly on the lower end surface of the first base material 1 and the upper end surface of the second base material 4 , or on the upper end surface of the second base material 4 .
  • the upper end surface is also only made of an edge insulation layer covering the first edge conductive layer 242, etc., as long as the insulation between the first conductive layer 211 and the second conductive layer 221 can be achieved.
  • the thickness of the first insulating layer 241 may be 5-15 ⁇ m.
  • the microstructure 23 is disposed between the first conductive layer 211 and the second conductive layer 221. It can be disposed on the lower end surface of the first base material 1 or the upper end surface of the second base material 4. When it is on the upper end surface of the base material 4 , it is specifically disposed on the upper end surface of the first insulating layer 241 . During implementation, it is preferably disposed on the upper end surface of the first insulating layer 241 . During implementation, the thickness of the microstructure 23 can be 12um-18um, and the size can be 80-100um.
  • the above-mentioned second base material 4, second conductive layer 221, second edge conductive layer 222, first insulating layer 241, and microstructure 23 constitute the non-vibration layer of the sound-generating unit.
  • Frame bonding is used between the vibrating layer and the non-vibrating layer of the sound-generating unit. Specifically, it refers to frame bonding between the lower end surface of the first conductive layer 211 and the upper end surface of the first insulating layer 241.
  • the first An edge fixing area 7 is provided on the outer edge of the insulating layer 241.
  • the edge fixing area 7 specifically includes a fixed area (not shown) on the outside and a fixed area on the inside.
  • the above-mentioned third conductive layer 31 and the fourth conductive layer 32 are fully bonded using colloid 8.
  • the thickness of the colloid 8 is preferably equal to the thickness between the first conductive layer 211 and the second conductive layer 221, so that the left and right sides can be balanced.
  • the height between the two areas and the height matching of the left and right partitions are conducive to maximizing the flatness of the display unit's visible area and ensuring maximum sound efficiency.
  • the thickness of the colloid 8 is 30um or less, preferably 25um-30um.
  • the first conductive layer 211 and the second conductive layer 221 may preferably be made of superconducting materials.
  • the conductive materials are less than 10 ohms.
  • the third conductive layer 31 and the fourth conductive layer 32 can be made of conductive materials with a sheet resistance of 100 ohms to less than 150 ohms. Generally, conductive materials with a sheet resistance of 150 ohms or 100 ohms are used.
  • the first base material 1, the touch area 3, the sound generation area 2 and the second base material 4 cooperate to form one half of the touch unit and the other half of the sound unit. That is to say, the touch unit is on the left and the sound unit is on the right. In this way, the left half of the touch sound display unit is the touch part and the right half is the sound part.
  • the two parts are spaced apart in the left and right directions. The functions of the two parts are independent and do not interfere with each other.
  • the first substrate 1 is made of PET material with a thickness of 23um, and the first conductive layer 211 and the second conductive layer 221 have a matching sheet resistance of 10 ohms.
  • the structure 23 and the first insulating layer 241 with a thickness of 5um ⁇ 15um can achieve a sound pressure of 70 ⁇ 80db at 1kHz.
  • the present invention also proposes a touch-control sound display device, which includes at least one touch-control sound display unit.
  • One display unit can be used for half touch control and half sound production.
  • the above-mentioned touch-control sound-generating display units include multiple splicing. After splicing, multiple touch-control areas and multiple sound-generating areas can be formed. The number and splicing method of the touch-control sound-generating display units can be selected as needed. For example, when this unit is used in a car, a touch-control sound display unit can be set up in the main driver, and a display unit can be set up in the passenger seat and the rear seat, so that each seat can realize touch control and sound.
  • a manufacturing process of a touch-controlled sound display unit disclosed by the present invention includes the following steps:
  • S1 form a third conductive layer and a first conductive layer that are insulated and spaced apart from each other on the lower end surface of the first base material, and then make a first edge conductive layer on the edge of the first conductive layer, and then make a first edge conductive layer on the edge of the first conductive layer.
  • a first edge insulating layer is formed on the edge conductive layer, and the first base material, the first conductive layer and the first edge conductive layer constitute the vibration layer of the sound-generating unit.
  • the conductive layer is first plated on the left half of the lower end surface of the first base material 1, then the conductive layer is plated on the right half of the lower end surface of the first base material 1, and then the conductive layer is plated on the middle area of the conductive layers on both sides.
  • the first spacer area 5 is etched or photolithographed.
  • the first spacer area 5 is a conductive layer-free area. In this way, the conductive layer on the left forms the third conductive layer 31, and the conductive layer on the right forms the first conductive layer 211.
  • sheet coating can also be used.
  • the area where the third conductive layer 31 is plated is first coated on the lower end surface of the first substrate 1 (of course, the area where the first conductive layer 211 is plated can also be coated. The order is not the same. limit), then plate a conductive layer in the area where the first conductive layer 211 is plated to form the first conductive layer 211, then tear off the film-coated area, replace the target material, and plate the conductive layer in another area (ie, plate the third conductive layer 31) . Then, a first edge conductive layer is formed on the edge of the first conductive layer.
  • S2 Form a fourth conductive layer and a second conductive layer that are insulated and spaced apart on the upper end surface of the second base material, and then make a second edge conductive layer on the edge of the second conductive layer, and then add a second edge conductive layer on the edge of the second conductive layer.
  • the second base material, the second conductive layer, the second edge conductive layer, the first insulating layer and the microstructure constitute the non-vibration layer of the sound-generating unit.
  • the process of forming a conductive layer on the first substrate is the same as the above-mentioned process.
  • the conductive layer is first plated on the left half of the upper end surface of the second substrate 4, and then the conductive layer is plated on the second substrate 4.
  • the right half of the upper end surface of 4 is plated with a conductive layer, and then a second spacer area 6 is etched or photo-etched in the middle area of the conductive layers on both sides.
  • the second spacer area 6 is the area without a conductive layer.
  • the fourth conductive layer 32 is formed, and the conductive layer on the right forms the second conductive layer 221.
  • sheet coating can also be used.
  • the area where the fourth conductive layer 32 is plated is first coated on the upper end surface of the second substrate 4 (of course, the area where the second conductive layer 221 is plated can also be coated. The order is not the same. limit), then a conductive layer is plated in the area where the second conductive layer 221 is plated to form the second conductive layer 221, and then the film-coated area is torn apart, the target material is replaced, and the conductive layer in another area (ie, the fourth conductive layer 32 is plated) The fourth conductive layer 32 is formed.
  • a second edge conductive layer 212 is formed on the edge of the second conductive layer 221, and then a 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.
  • Microstructures 23 are formed on an insulating layer 241.
  • S3 The third conductive layer and the fourth conductive layer are fully bonded, and the vibration layer and the non-vibration layer are frame-laminated. After bonding, one side of the manufactured touch-control sound-generating display unit forms a touch-sensitive display unit. The control unit forms the sound-generating unit on one side.
  • the third conductive layer 31 and the fourth conductive layer 32 are fully bonded using colloid 8.
  • the thickness of the colloid 8 is preferably the same as the thickness between the first conductive layer 211 and the second conductive layer 221. equal.
  • Frame bonding is used between the vibrating layer and the non-vibrating layer of the sound-generating unit. Specifically, it refers to frame bonding between the lower end surface of the first conductive layer 211 and the upper end surface of the first insulating layer 241, so that the vibrating layer and the non-vibrating layer The air gap required for the vibration of the vibration layer is formed between them.
  • a heating tensioning process or a jig tensioning process can be used for tensioning and bonding.
  • a vibration layer tensioning process for a directional sound-emitting display screen, and will not be described in detail here.
  • the advantages of the present invention are: 1.
  • the present invention combines an electrostatic ultrasonic transducer with a touch screen, so that one side of the display device can emit sound in a screen-directed manner and the other side can be touched, without interfering with each other on both sides.
  • the display device can achieve screen-directed sound emitting and listening. While being private and avoiding interference to surrounding people, it also has a touch function, expanding its application scope and can be used in cars. 3.
  • the present invention enables the formed display device to achieve an audible sound pressure level of 70-80db at 1KHz.

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Abstract

本发明公开了一种触控发声显示单元及装置，所述单元包括自上而下依次层叠设置的第一基材、功能区和第二基材，功能区包括触控区和发声区，触控区和发声区均位于第一基材和第二基材之间，且两者在水平方向上相间隔设置，触控区和发声区共用第一基材和第二基材，发声区为静电式超声换能器。本发明将静电式超声换能器与触控屏相结合，使显示装置一边可以屏幕定向发声，一边可以触控，两边互不干扰，在实现屏幕定向发声，收听私密且避免对周边人员的干扰的同时，又使其具有了触控功能，拓展了其应用范围。

Description

一种触控发声显示单元及装置 技术领域
本发明涉及屏幕定向发声技术领域，具体涉及一种触控发声显示单元及装置。
背景技术
显示器件的超薄、窄边框、甚至全屏设计，留给发声装置的空间越来越小。而传统的发声装置体积较大，安装位置受到限制，在新一代的显示器件中很难有合适的位置和空间。因此，需要重新设计能够适应当前显示器件的需求的发声装置。
一些显示器件的生产厂商设计了以屏幕来进行发声的方式，屏幕发声技术作为一种表面音频技术，为多媒体视听设备音响提供了新的解决方案。目前，将显示器件与屏幕发声装置相结合的透明式屏幕定向扬声器正在研制中，利用屏幕自身振动作为扬声器，节约了传统扬声器的共振腔空间，同时定向传播特性满足了个人电子设备的隐私性要求和公众设备的互不干扰性要求。
触摸面板能够识别通过人手或单独的输入单元输入的触摸点，并传送与之对应的信息到上方的显示设备。根据触摸面板的接触感测方法，将触摸面板分成电阻型、电容型和红外感测型。由于电容型触摸面板的制造方法容易并且传感力强，因此目前得到广泛关注。
如何将屏幕定向发声与触控功能相结合，使显示器可以集成屏幕定向发声、显示及触控等多功能于一体，且两种功能互不干扰，是目前需要解决的问题。
发明内容：
本发明的目的在于提供一种可以同时实现触控功能和屏幕定向发声功能的触控发声显示单元及装置。
为实现上述目的，一方面，本发明提出了一种触控发声显示单元，所述单元包括自上而下依次层叠设置的第一基材、功能区和第二基材，所述功能区包括触控区和发声区，所述触控区和发声区均位于所述第一基材和第二基材之间，且两者在水平方向上相间隔设置，所述触控区和所述发声区共用所述第一基材和第二基材，所述发声区为静电式超声换能器。
在一优选实施例中，所述静电式超声换能器包括第一电极、第二电极和微结构，所述第一电极形成于第一基材与第二基材相对的部分下端面上，所述第二电极形成于第二基材与第一基材相对的部分上端面上，所述微结构形成于所述第一电极和第二电极之间，用于提供发声层振动发声所需的空气间隙，所述第一基材和第二基材的位于发声区的外边缘进行边框贴合。
在一优选实施例中，所述第一电极包括第一导电层和第一边缘导电层，所述第二电极包括第二导电层和第二边缘导电层，所述第一导电层形成于第一基材与第二基材相对的部分下端面上，所述第一边缘导电层形成于第一导电层位于发声区的至少一边的边缘；所述第二导电层形成于第二基材与第一基材相对的部分上端面上，所述第二边缘导电层形成于第二导电层位于发声区的至少一边的边缘。
在一优选实施例中，所述静电式超声换能器还包括绝缘层，所述绝缘层包括第一绝缘层和第一边缘绝缘层，所述第一绝缘层形成于第二基材与第一基材相对的部分上端面上且至少覆盖住所述第二导电层和第二边缘导电层， 所述微结构形成于所述第一绝缘层上，所述第一边缘绝缘层形成于第一基材与第二基材相对的部分下端面上且至少覆盖住所述第一边缘导电层。
在一优选实施例中，所述触控区包括第三导电层和第四导电层，所述第三导电层形成于第一基材与第二基材相对的部分下端面上，且与所述第一导电层相间隔设置；所述第四导电层形成于第二基材与第一基材相对的部分上端面上，且与所述第一导电层相间隔设置。
在一优选实施例中，所述第三导电层与第一导电层的下端面齐平，且两者之间通过第一间隔区相绝缘间隔开；所述第四导电层与第二导电层的下端面齐平，且两者之间通过第二间隔区相绝缘间隔开。
优选地，所述第三导电层和第四导电层之间通过胶体胶粘贴合，所述胶体的厚度与所述第一导电层和第二导电层之间的厚度相同。
优选地，所述第三导电层的方阻高于第一导电层的方阻，所述第四导电层的方阻高于第二导电层的方阻。
优选地，第一导电层和第二导电层采用10欧姆以下的导电材料，所述第三导电层和第四导电层采用100欧姆～150欧姆以下的导电材料。
优选地，所述第一基材和第二基材均为PET膜，所述第一基材的厚度为20um～25um，第二基材的厚度为50um～55um，所述第一间隔区和第二间隔区的宽度为20um以下，其宽度越窄，可视化效果越好。
另一方面，本发明提出了一种触控发声显示装置，包括至少一个上述的触控发声显示单元或多个拼接的上述的触控发声显示单元。
与现有技术相比，本发明具有如下有益效果：
1、本发明将静电式超声换能器与触控屏相结合，使显示装置一边可以屏 幕定向发声，一边可以触控，两边互不干扰，在实现屏幕定向发声，收听私密且避免对周边人员的干扰的同时，又使其具有了触控功能，拓展了其应用范围，可用于汽车。
2、本发明通过用两层基材层，并结合相应的制备工艺以及不同的材料参数的配合，使得形成的显示装置在1KHz可听声声压级可达到70～80db。
附图说明：
图1为本发明触控发声显示单元的结构示意图；
图2为本发明一实施例中触控发声显示单元的结构示意图；
图3为本发明一实施例中发声层的结构示意图；
图4为本发明触控发声显示装置(具有一个触控发声显示单元)的分区结构示意图；
图5为本发明触控发声显示装置(具有两个拼接的触控发声显示单元)的分区结构示意图；
图6为本发明制备工艺的流程示意图。
附图标记为：
1、第一基材，2、发声区，21、第一电极，211、第一导电层，212、第一边缘导电层，22、第二电极，221、第二导电层，222、第二边缘导电层，23、微结构，24、绝缘层，241、第一绝缘层，242、第一边缘绝缘层，3、触控区，31、第三导电层，32、第四导电层，4、第二基材，5、第一间隔区，6、第二间隔区，7、边缘固定区，8、胶体。
具体实施方式：
下面对本发明的具体实施方式进行详细描述，但应当理解本发明的保护范围并不受具体实施方式的限制。
除非另有其它明确表示，否则在整个说明书和权利要求书中，术语“包括”或其变换如“包含”或“包括有”等等将被理解为包括所陈述的元件或组成部分，而并未排除其它元件或其它组成部分。
本发明所揭示的一种触控发声显示单元及装置，通过将静电式超声换能器与触控屏相结合，使显示装置一边可以屏幕定向发声，一边可以触控，两边互不干扰，在实现屏幕定向发声，收听私密且避免对周边人员的干扰的同时，又使其具有了触控功能，拓展了其应用范围，如可用于汽车。
如图1所示，本发明实施例所揭示的一种触控发声显示单元，包括自上而下依次层叠设置的第一基材1、功能区和第二基材4，功能区包括相间隔设置的发声区2和触控区3，也就是说，第一基材1、功能区和第二基材4配合形成一边为触控单元，一边为发声单元，实现显示屏在能触控显示的同时也可以定向发声，且两者互不干扰。
具体地，第一基材1位于最上层，可选用触控领域常用的PET材质，也可选CPI(透明聚酰亚胺薄膜)/PI(聚酰亚胺薄膜)/UTG(Ultra-Thin Glass:超薄玻璃),第一基材1的厚度越低，发声效率越高。优选厚度可采用6um～50um，常用厚度为6um、12um、21um、23um、25um或50um。第二基材4位于最下层，也可以选用触控领域常用的PET材质或者玻璃等，常用厚度为50um。
结合图2和图3所示，触控区3和发声区2位于第一基材1和第二基材4之间，两者左右相间隔设置，其中，发声区2采用静电式超声换能器，其具 体包括第一电极21、第二电极22、微结构23和绝缘层24，其中，第一电极21包括第一导电层211和第一边缘导电层212，触控区3包括第三导电层31和第四导电层32，其中，第三导电层31和第一导电层211均形成于第一基材1的下端面上，且分别位于第一基材1下端面的左右两边，两者之间通过第一间隔区5隔开。制备时，先在第一基材1的下端面上的左边一半镀导电层，再在第一基材1的下端面上的右边一半镀导电层，之后在两边导电层的中间区域刻蚀或者光刻出第一间隔区5，第一间隔区5即为无导电层区域，这样，左边的导电层则形成第三导电层31，右边的导电层则形成第一导电层211。另外也可采用片材镀膜，具体为：先在第一基材1的下端面上镀第三导电层31的区域覆膜(当然也可在镀第一导电层211的区域覆膜，顺序不限)，然后在镀第一导电层211的区域镀导电层形成第一导电层211，之后撕开覆膜区域，更换靶材，镀另外一个区域(即镀第三导电层31)的导电层。
由于触控所需的导电层的方阻大小与发声所需的导电层的方阻大小不同，优选地，第三导电层31和第一导电层211的方阻设置不一致，优选为第三导电层31的方阻大于第一导电层211的方阻，当然，若触控可兼容低电阻材料，也可以将第三导电层31的方阻和第一导电层211的方阻选择相同。这样镀导电层时，可以实施卷材镀膜，即第一基材1的下端面上整体镀相同方阻的导电层。其中，发声区2的导电层(即这里的第一导电层211)的方阻越低越有利于发声效率增大，优选采用10欧姆以下的导电材料。
第一边缘导电层212至少形成于第一导电层211的边缘，也就是说，其可以只围绕第一导电层211的外边缘(可以除与左边第一间隔区5的一边相邻的那一边缘)一圈设置第一边缘导电层212。其中，第一基材1的右半部分、 第一导电层211和第一边缘导电层212构成发声单元的振动层。
第二电极22包括第二导电层221和第二边缘导电层222，第四导电层32和第二导电层221均形成于第二基材4的上端面上，且分别位于第二基材4上端面的左右两边，两者之间通过第二间隔区6隔开。与第四导电层32和第二导电层221的制备工艺相同，制备时，先在第二基材4的上端面上的左边一半镀导电层，再在第二基材4的上端面上的右边一半镀导电层，之后在两边导电层的中间区域刻蚀或者光刻出第二间隔区6，第二间隔区6即为无导电层区域，这样，左边的导电层则形成第四导电层32，右边的导电层则形成第二导电层221。另外也可采用片材镀膜，具体为：先在第二基材4的上端面上镀第四导电层32的区域覆膜(当然也可在镀第二导电层221的区域覆膜，顺序不限)，然后在镀第二导电层221的区域镀导电层形成第二导电层221，之后撕开覆膜区域，更换靶材，镀另外一个区域(即镀第四导电层32)的导电层。实施时，第一间隔区和第二间隔区的宽度为20um以下，所述胶体8的厚度为25um以下。
同样，由于触控所需的导电层的方阻大小与发声所需的导电层的方阻大小不同，优选地，第四导电层32和第二导电层221的方阻设置不一致，优选为第四导电层32的方阻大于第二导电层221的方阻，当然，若触控可兼容低电阻材料，也可以将第四导电层32的方阻和第二导电层221的方阻选择相同。这样镀导电层时，可以实施卷材镀膜，即第二基材4的上端面上整体镀相同方阻的导电层。其中，发声区的导电层(即这里的第二导电层221)的方阻越低越有利于发声效率增大，优选采用10欧姆以下的导电材料。
第二边缘导电层212至少形成于第二导电层221的边缘，也就是说，其 可以只围绕第二导电层221的外边缘(可以除与左边第二间隔区6的一边相邻的那一边缘)一圈设置第二边缘导电层222。
绝缘层24具体包括第一绝缘层241和第一边缘绝缘层242，其中，第一绝缘层241形成于第二基材4与第一基材1相对的上端面上且至少覆盖住第二导电层221和第二边缘导电层222，本实施例中，第一绝缘层241覆盖住第二导电层221和第二边缘导电层222。第一边缘绝缘层242形成于第一基材1与第二基材4相对的下端面上且至少覆盖住第一边缘导电层212。本实施例中，第一边缘绝缘层242沿覆盖住第一边缘导电层212。在其他实施例中，绝缘层也可以有其他替换结构，如也可以在第一基材1的下端面和第二基材4的上端面均整面设置绝缘层，或者在第二基材4的上端面也只做覆盖住第一边缘导电层242的边缘绝缘层等等，只要能实现第一导电层211和第二导电层221之间的绝缘即可。实施时，第一绝缘层241的厚度可为5～15um。
微结构23设置于第一导电层211和第二导电层221之间，其可以设置在第一基材1的下端面上也可以设置在第二基材4的上端面上，设置在第二基材4的上端面上时，具体是设置于第一绝缘层241的上端面上。实施时，优选设置于第一绝缘层241的上端面上。实施时，微结构23的厚度可为12um～18um，大小为80～100um。
其中，上述第二基材4、第二导电层221、第二边缘导电层222、第一绝缘层241、微结构23构成发声单元的非振动层。发声单元的振动层和非振动层之间采用边框贴合，具体是指第一导电层211的下端面与第一绝缘层241的上端面之间进行边框贴合，本实施例中，第一绝缘层241的外边缘上设置有边缘固定区7，边缘固定区7具体包括位于外侧的定区(图未示)和位于内 侧的非定区(图未示)，其中，定区可采用双面胶，非定区可采用硅胶或者UV胶等。
另外，上述第三导电层31和第四导电层32之间使用胶体8进行全贴合，胶体8的厚度优选与第一导电层211和第二导电层221之间厚度相等，从而可以平衡左右两个区之间的高度，左右两个分区高度匹配有利于显示单元可视区平整度最高化，同时可以保证发声效率最大化。实施时，胶体8厚度采用30um以下，优选25um～30um。
实施时，上述第一导电层211和第二导电层221可优选为超导材料，方阻越低越有利于发声效率提高，优选10欧姆以下导电材料。第三导电层31和第四导电层32可采用方阻为100欧姆～150欧姆以下的导电材料，一般采用方阻为150欧姆或者为100欧姆的导电材料。
另外，在上述方案中，第一基材1、触控区3、发声区2和第二基材4配合形成一半为触控单元，另一半为发声单元。也就是说，触控单元位于左边，发声单元位于右边，这样整体形成的触控发声显示单元的左边一半为触控部分，右边一半为发声部分，两部分在左右方向是相间隔设置的，可以实现两部分功能相独立且互不干扰。
在一具体实施例中，第一基材1采用厚度为23um的PET材质，匹配方阻为10欧姆的第一导电层211和第二导电层221，厚度为12um～18um、80um～100um的微结构23，及厚度为5um～15um的第一绝缘层241，在1kHz处声压可达到70～80db。
结合图4和图5所示，本发明还提出了一种触控发声显示装置，包括至少一个触控发声显示单元，一个显示单元可以一半触控，一半发声。也可以 包括多个拼接的上述触控发声显示单元，拼接后可以形成多个触控区和多个发声区，可以根据需要选择触控发声显示单元的个数和拼接方式。如当该单元用于汽车上时，可以在主驾设置一个触控发声显示单元，也可以在副驾和后排座位各设置一个显示单元，实现每个座位都可以实现触控和发声。
另一方面，如图6所示，本发明所揭示的一种触控发声显示单元的制备工艺，包括以下几个步骤：
S1，在第一基材的下端面上形成相绝缘间隔开的第三导电层和第一导电层，之后在所述第一导电层的边缘做第一边缘导电层，然后在所述第一边缘导电层上做第一边缘绝缘层，所述第一基材、第一导电层和所述第一边缘导电层构成发声单元的振动层。
本实施例中，具体先在第一基材1的下端面上的左边一半镀导电层，再在第一基材1的下端面上的右边一半镀导电层，之后在两边导电层的中间区域刻蚀或者光刻出第一间隔区5，第一间隔区5即为无导电层区域，这样，左边的导电层则形成第三导电层31，右边的导电层则形成第一导电层211。另外也可采用片材镀膜，具体为：先在第一基材1的下端面上镀第三导电层31的区域覆膜(当然也可在镀第一导电层211的区域覆膜，顺序不限)，然后在镀第一导电层211的区域镀导电层形成第一导电层211，之后撕开覆膜区域，更换靶材，镀另外一个区域(即镀第三导电层31)的导电层。之后在所述第一导电层的边缘做第一边缘导电层。
S2，在第二基材的上端面上形成相绝缘间隔开的第四导电层和第二导电层，之后在所述第二导电层的边缘做第二边缘导电层，之后再在所述第二导电层上做整面第一绝缘层，然后在所述第一绝缘层的上端面上做微结构，所 述第二基材、第二导电层、第二边缘导电层、第一绝缘层和所述微结构构成所述发声单元的非振动层。
具体地，本实施例中，与上述在第一基材上形成导电层的工艺一样，制备时，先在第二基材4的上端面上的左边一半镀导电层，再在第二基材4的上端面上的右边一半镀导电层，之后在两边导电层的中间区域刻蚀或者光刻出第二间隔区6，第二间隔区6即为无导电层区域，这样，左边的导电层则形成第四导电层32，右边的导电层则形成第二导电层221。另外也可采用片材镀膜，具体为：先在第二基材4的上端面上镀第四导电层32的区域覆膜(当然也可在镀第二导电层221的区域覆膜，顺序不限)，然后在镀第二导电层221的区域镀导电层形成第二导电层221，之后撕开覆膜区域，更换靶材，镀另外一个区域(即镀第四导电层32)的导电层形成第四导电层32。之后在第二导电层221的边缘做第二边缘导电层212，之后在第二导电层221上做覆盖住第二边缘导电层212和第二导电层221的第一绝缘层241，之后在第一绝缘层241上做微结构23。
S3，将所述第三导电层和第四导电层做全贴合，且将所述振动层和非振动层进行边框贴合，贴合后，制成的触控发声显示单元的一边形成触控单元，一边形成所述发声单元。
具体地，本实施例中，将第三导电层31和第四导电层32之间使用胶体8进行全贴合，胶体8的厚度优选与第一导电层211和第二导电层221之间厚度相等。发声单元的振动层和非振动层之间采用边框贴合，具体是指第一导电层211的下端面与第一绝缘层241的上端面之间进行边框贴合，使振动层和非振动层之间形成振动层振动所需的空气间隙。
优选地，在将第一基材和第二基材贴合时，可以采用加热张紧工艺或者治具张紧工艺进行张紧贴合。具体张紧工艺可参照之前申请的申请号为CN202210469615.3，发明名称为一种定向发声显示屏的振动层张紧工艺中的描述，这里不做赘述。
本发明的优点在于，1、本发明将静电式超声换能器与触控屏相结合，使显示装置一边可以屏幕定向发声，一边可以触控，两边互不干扰，在实现屏幕定向发声，收听私密且避免对周边人员的干扰的同时，又使其具有了触控功能，拓展了其应用范围，可用于汽车。3、本发明通过用两层基材层，并结合相应的制备工艺以及不同的材料参数的配合，使得形成的显示装置在1KHz可听声声压级可达到70～80db。
前述对本发明的具体示例性实施方案的描述是为了说明和例证的目的。这些描述并非想将本发明限定为所公开的精确形式，并且很显然，根据上述教导，可以进行很多改变和变化。对示例性实施例进行选择和描述的目的在于解释本发明的特定原理及其实际应用，从而使得本领域的技术人员能够实现并利用本发明的各种不同的示例性实施方案以及各种不同的选择和改变。本发明的范围意在由权利要求书及其等同形式所限定。

Claims (10)

  1. 一种触控发声显示单元，其特征在于，所述单元包括自上而下依次层叠设置的第一基材、功能区和第二基材，所述功能区包括触控区和发声区，所述触控区和发声区均位于所述第一基材和第二基材之间，且两者在水平方向上相间隔设置，所述触控区和所述发声区共用所述第一基材和第二基材，所述发声区为静电式超声换能器。
  2. 如权利要求1所述的一种触控发声显示单元，其特征在于，所述静电式超声换能器包括第一电极、第二电极和微结构，所述第一电极形成于第一基材与第二基材相对的部分下端面上，所述第二电极形成于第二基材与第一基材相对的部分上端面上，所述微结构形成于所述第一电极和第二电极之间，用于提供发声层振动发声所需的空气间隙，所述第一基材和第二基材的位于发声区的外边缘进行边框贴合。
  3. 如权利要求2所述的一种触控发声显示单元，其特征在于，所述第一电极包括第一导电层和第一边缘导电层，所述第二电极包括第二导电层和第二边缘导电层，所述第一导电层形成于第一基材与第二基材相对的部分下端面上，所述第一边缘导电层形成于第一导电层位于发声区的至少一边的边缘；所述第二导电层形成于第二基材与第一基材相对的部分上端面上，所述第二边缘导电层形成于第二导电层位于发声区的至少一边的边缘。
  4. 如权利要求3所述的一种触控发声显示单元，其特征在于，所述静电式超声换能器还包括绝缘层，所述绝缘层包括第一绝缘层和第一边缘绝缘层，所述第一绝缘层形成于第二基材与第一基材相对的部分上端面上且至少覆盖住所述第二导电层和第二边缘导电层，所述微结构形成于所述第一绝缘层上，所述第一边缘绝缘层形成于第一基材与第二基材相对的部分下端面上且至少 覆盖住所述第一边缘导电层。
  5. 如权利要求3所述的一种触控发声显示单元，其特征在于，所述触控区包括第三导电层和第四导电层，所述第三导电层形成于第一基材与第二基材相对的部分下端面上，且与所述第一导电层在水平方向上相间隔设置；所述第四导电层形成于第二基材与第一基材相对的部分上端面上，且与所述第一导电层在水平方向上相间隔设置。
  6. 如权利要求5所述的一种触控发声显示单元，其特征在于，所述第三导电层与第一导电层的下端面齐平，且两者之间通过第一间隔区相绝缘间隔开；所述第四导电层与第二导电层的下端面齐平，且两者之间通过第二间隔区相绝缘间隔开。
  7. 如权利要求6所述的一种触控发声显示单元，其特征在于，所述第三导电层和第四导电层之间通过胶体胶粘贴合，所述胶体的厚度与所述第一导电层和第二导电层之间的厚度相同。
  8. 如权利要求5所述的一种触控发声显示单元，其特征在于，所述第三导电层的方阻高于第一导电层的方阻，所述第四导电层的方阻高于第二导电层的方阻。
  9. 如权利要求7所述的一种触控发声显示单元，其特征在于，所述第一基材和第二基材均为PET膜，所述第一基材的厚度为20um～25um，第二基材的厚度为50um～55um，所述第一间隔区和第二间隔区的宽度为20um以下，所述胶体的厚度为30um以下。
  10. 一种触控发声显示装置，其特征在于，包括至少一个权利要求1～9任意一项所述的触控发声显示单元或多个拼接的权利要求1～9任意一项所述 的触控发声显示单元。
PCT/CN2023/093239 2022-05-25 2023-05-10 一种触控发声显示单元及装置 WO2023226763A1 (zh)

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