WO2023226764A1 - 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
WO2023226764A1
WO2023226764A1 PCT/CN2023/093241 CN2023093241W WO2023226764A1 WO 2023226764 A1 WO2023226764 A1 WO 2023226764A1 CN 2023093241 W CN2023093241 W CN 2023093241W WO 2023226764 A1 WO2023226764 A1 WO 2023226764A1
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WO
WIPO (PCT)
Prior art keywords
base material
layer
sound
conductive layer
touch
Prior art date
Application number
PCT/CN2023/093241
Other languages
English (en)
French (fr)
Inventor
毛峻伟
匡正
胡亚云
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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Publication date
Priority claimed from CN202210577944.XA external-priority patent/CN115243168B/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 WO2023226764A1 publication Critical patent/WO2023226764A1/zh

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Classifications

    • 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
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

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-generating display unit, which unit includes a first substrate, a sound-generating layer, a second substrate layer and a third substrate that are stacked in sequence from top to bottom. layer, the sound-emitting layer is located between the first base material and the second base material layer, and cooperates with the first base material and the second base material layer to form sound-emitting areas and non-sound-emitting areas that are spaced apart, and the second base material The material layer and the third base material layer cooperate to form touch areas and non-touch areas that are spaced apart, and the sound-generating area and the touch area are arranged in offset positions.
  • the sound-generating layer includes a first electrode, a second electrode and a microstructure.
  • the first electrode is located in the sound-generating area and is formed on the opposite lower end surface of the first base material and the second base material layer.
  • the second electrode is located in the sound-generating area and is formed on the upper end surface of the second base material layer opposite to the first base material, and the microstructure is formed between the first electrode and the second electrode.
  • the first base material and the second base material layer are frame-bonded.
  • the microstructure is provided in the sound emitting area, or the microstructure is provided in both the sound emitting area and the non-sound emitting area.
  • 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 located in the sound emitting area.
  • the first edge conductive layer is formed at least on the edge of the first conductive layer
  • the second conductive layer is located in the sound-generating area and is formed on the second
  • the second edge conductive layer is formed at least on the edge of the second conductive layer.
  • the sound-emitting layer 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 layer and the first base material.
  • the opposite upper end surface 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 first base material and the second edge conductive layer.
  • the opposite lower end surfaces of the two base material layers at least cover the first edge conductive layer.
  • the second base material layer includes a second base material and a third conductive layer, and the third conductive layer is formed on the lower end surface of the second base material opposite to the third base material layer. and is located in the touch area;
  • the third base material layer includes a third base material and a fourth conductive layer, and the fourth conductive layer is formed on the upper end surface of the third base material opposite to the second base material. and is located in the touch area.
  • an edge fixing area is provided on the outer edge of the first insulating layer, and the lower end surface of the first base material and the upper end surface of the first insulating layer are frame-fitted through the edge fixing area.
  • the edge fixing area includes a fixed area located on the outside and a non-fixed area located on the inside.
  • the fixed area uses double-sided tape
  • the non-fixed area uses silicone gel or UV glue.
  • 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.
  • 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 emit screen-oriented sound, and the other side can be touched, without interfering with each other. It achieves screen-oriented sound emitting, provides private listening, and avoids disturbing surrounding people. While eliminating interference, it also has a touch function, expanding its application scope and can be used in automobiles.
  • the present invention uses three 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.
  • the reference numbers are: 1. First base material, 2. Sound-emitting layer, 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 insulating layer, 242. First edge insulating layer, 3. Second base material layer, 31. Second base material, 32. Third conductive layer , 4. The third base material layer, 41. The third base material, 42. The fourth conductive layer, 5. Edge fixation area.
  • 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-generating display unit disclosed in an embodiment of the present invention includes a first substrate 1 , a sound-generating layer 2 , a second substrate layer 3 and a third substrate layered in sequence from top to bottom.
  • Material layer 4, and the first base material 1, the sound-emitting layer 2, the second base material layer 3 and the third base material layer 4 cooperate to form a sound-emitting unit on one side and a touch unit on the other side, so that the display screen can display while also It can produce directional sound 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 ⁇ 50um, and the commonly used thicknesses are 6um, 12um, 23um or 50um.
  • the sound-emitting layer 2 is located between the first substrate 1 and the second substrate layer 3 , and specifically includes a first electrode 21 , a second electrode 22 , a microstructure 23 and an insulating layer 24 , where , the first electrode 21 includes a first conductive layer 211 and a first edge conductive layer 212.
  • the first conductive layer 211 is formed on the opposite lower end surface of the first base material 1 and the second base material layer 3, specifically occupying the first base material 211.
  • a part of the lower end surface of the first base material 1 occupies the right half of the lower end surface of the first base material 1 , that is to say, the left half of the lower end surface of the first base material 1 is not provided with a conductive layer, and the right half forms the first conductive layer 211 .
  • a conductive layer is plated on the entire lower end surface of the first substrate 1, and then the left half of the conductive layer on the first substrate 1 is etched away, leaving the right half of the conductive layer as the first conductive layer 211.
  • the first conductive layer 211 is not limited to occupying half of the first substrate 1 , and the size of the distribution area of the first conductive layer 211 on the first substrate 1 can be set according to actual needs.
  • 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 edge adjacent to the left side without a conductive layer).
  • the first edge conductive layer 212 is provided in a circle.
  • the first edge conductive layer 212 can also be provided all around the outer edge of the lower end surface of the first base material 1 .
  • the first base material 1, the first conductive layer 211 and the first edge conductive layer 212 constitute the vibration layer of the sound-emitting layer 2.
  • the second electrode 22 includes a second conductive layer 221 and a second edge conductive layer 222.
  • the second conductive layer 221 is formed on the upper end surface of the second base material layer 3 opposite to the first base material 1, specifically occupying an area of the second base material layer 222.
  • a part of the upper end surface of the second base material layer 3, such as occupying the right half of the upper end surface of the second base material layer 3, that is to say, the left half of the upper end surface of the second base material layer 3 is not provided with a conductive layer, and the right half forms the second conductive layer 221 .
  • a conductive layer can be plated on the entire lower end surface of the second base material layer 3, and then the left half of the conductive layer on the second base material layer 3 is etched away, leaving the right half of the conductive layer.
  • the second conductive layer 221 is not limited to occupying half of the upper end surface of the second base material layer 3.
  • the size of the distribution area of the second conductive layer 221 on the second base material layer 3 can be set according to actual needs. .
  • the second edge conductive layer 222 is formed at least on the edge of the second conductive layer 221 , that is, it may only surround the outer edge of the second conductive layer 221 (except for the edge adjacent to the left side without a conductive layer).
  • the second edge conductive layer 222 is provided in a circle.
  • the second edge conductive layer 222 can also be provided all around the outer edge of the upper end surface of the second base material layer 3 .
  • 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 base material layer 3 opposite to the first base material 1 and at least covers the second The conductive layer 221 and the second edge conductive layer 222.
  • the first insulating layer 241 covers the entire upper end surface of the second base material layer 3 and the second conductive layer 221.
  • the first edge insulating layer 242 is formed on the lower end surface of the first base material 1 opposite to the second base material layer 3 and at least covers the first edge conductive layer 212 .
  • the first edge insulating layer 242 is disposed along the first edge conductive layer 212 and covers the first edge conductive layer 212 .
  • the insulating layer can also have other alternative structures.
  • the insulating layer can also be provided on the lower end surface of the first base material 1 and the upper end surface of the second base material layer 3, or on the second base material layer 3.
  • the upper end surface of 3 is only 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 height 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 on the upper end surface of the second base material layer 3. Specifically, it is disposed on the upper end surface of the first insulating layer 241 . It is preferable that the first insulating layer 241 is provided on the upper end surface.
  • the microstructure 23 may be disposed only on the right half of the first insulating layer 241 , or the microstructure 23 may be disposed on the entire upper end surface of the first insulating layer 241 (except for the edge of the frame).
  • the height of the microstructure 23 can be 12um-18um, and the size can be 80-100um.
  • the second base material layer 3 includes a second base material 31 and a third conductive layer 32, wherein the third conductive layer 32 is formed on the lower end surface of the second base material 31 opposite to the third base material layer 4, specifically occupying the second A part of the lower end surface of the base material 31 occupies the left half of the lower end surface of the second base material 31 , that is to say, the right half of the lower end surface of the second base material 31 is not provided with a conductive layer, and the left half forms the third conductive layer 32 .
  • a conductive layer can be plated on the entire lower end surface of the second base material 31 first, and then the second base material 31 can be The right half of the conductive layer is etched away, and the left half of the conductive layer is retained as the third conductive layer 32 .
  • the third conductive layer 32 is not limited to occupying half of the second substrate 31 , and the size of the distribution area of the third conductive layer 32 on the second substrate 31 can be set according to actual needs.
  • the third base material layer 4 includes a third base material 41 and a fourth conductive layer 42, wherein the fourth conductive layer 42 is formed on the upper end surface of the third base material 41 opposite to the second base material 31, specifically occupying the third base material 41.
  • a part of the upper end surface of the third base material 41 occupies the left half of the upper end surface of the third base material 41 , that is to say, the right half of the upper end surface of the third base material 41 is not provided with a conductive layer, and the left half forms the fourth conductive layer 42 .
  • a conductive layer can be plated on the entire lower end surface of the third base material 41, and then the right half of the conductive layer on the third base material 41 is etched away, leaving the left half of the conductive layer. layer as the fourth conductive layer 42.
  • the fourth conductive layer 42 is not limited to occupying half of the third substrate 41 , and the size of the distribution area of the fourth conductive layer 42 on the third substrate 41 can be set according to actual needs.
  • the lower end surface of the second base material layer 3 and the upper end surface of the third base material layer 4 are bonded together.
  • adhesive bonding is used to ensure the lowest thickness and reduce the risk of the third conductive layer of the second base material 31. 43 and the fourth conductive layer 42 of the third base material 41.
  • a colloid with a thickness of 23um or more can be used for bonding.
  • the colloid can be OCA (Optically Clear Adhesive, optical double-sided tape). Glue or OCR (Optical Clear Resin, liquid optical glue) glue.
  • the above-mentioned second base material 31, second conductive layer 221, second edge conductive layer 222, first insulating layer 241, and microstructure 23 constitute the non-vibration layer of the sound-emitting layer 2.
  • Frame bonding is used between the vibrating layer and the non-vibrating layer of the sound-generating layer 2. Specifically, it refers to frame bonding between the lower end surface of the first base material 1 and the upper end surface of the first insulating layer 241.
  • the An edge fixing area 5 is provided on the outer edge of an insulating layer 241.
  • the edge fixing area 5 specifically includes a fixed area located on the outside (not shown) and an area located on the inside. For non-fixed areas (not shown in the figure), double-sided tape can be used for fixed areas, and silicone or UV glue can be used for non-fixed areas.
  • 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 32 and the fourth conductive layer 42 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 sound-emitting layer 2 and the second base material 31 cooperate to form sound-emitting areas and non-sound-emitting areas that are spaced apart.
  • the left half is a non-sound-emitting area (that is, no sound is emitted).
  • the right half is the vocal area.
  • the second base material layer 3 and the third base material layer 4 cooperate to form touch areas and non-touch areas (ie, non-touch areas) that are spaced apart.
  • the left half is the touch area and the right half is the non-touch area. Touch area. That is to say, the touch area is on the left and the sound area is on the right.
  • the left half of the overall touch sound display unit is the effective touch part and the right half is the effective sound part.
  • the two parts are offset in the left and right directions. , which can realize that 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, the first conductive layer 211 and the second conductive layer 221 with a matching square resistance of 10 ohms, and the heights of the micro-layers are 12um-18um and 80um-100um.
  • the structure 23 and the first insulating layer 241 with a height of 5um to 15um can have a sound pressure of 70 to 80db at 1kHz.
  • a cover plate (not shown) can also be added to the upper surface of the second base material 31 to form the second conductive layer 221 on the upper surface of the cover plate, or the second conductive layer 221 can be formed separately. On the upper end surface of an independent base material, the added base material is then bonded to the upper surface of the second base material 31 .
  • the present invention also proposes a touch-controlled sound-generating display device, including: One less touch and sound display unit, one display unit can be half touch and half sound. It can also include multiple spliced touch-control sound-generating display units. 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 according to needs. 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:
  • the third conductive layer 32 is partially formed on the lower end surface of the second base material 31, and the fourth conductive layer 42 is partially formed on the upper end surface of the third base material 41, and then the lower end surface of the second base material 31 and The upper end surface of the third base material 41 is bonded.
  • a conductive layer can be plated on the entire lower end surface of the second base material 31, and then the right half of the conductive layer of the second base material 31 is etched away, leaving the left half of the conductive layer as the third conductive layer.
  • a conductive layer can be plated on the entire lower end surface of the third base material 41, and then the right half of the conductive layer of the third base material 41 is etched away, leaving the left half of the conductive layer as the third base material 41.
  • the second conductive layer 221 is partially formed on the upper end surface of the second base material 41, the second edge conductive layer 222 is formed on the edge of the second conductive layer 221, and then the first conductive layer 222 is formed on the upper end surface of the second base material 31. Insulating layer 241, and then microstructures 23 are formed on the first insulating layer 241.
  • a conductive layer can be plated on the entire lower end surface of the second base material layer 3, and then the left half of the conductive layer on the second base material layer 3 can be etched away, leaving the right half of the conductive layer.
  • the second conductive layer 221. make a second edge conductive layer around the outer edge of the upper end surface of the second base material layer 3 222.
  • the first insulating layer 241 covering the upper end surface of the second base material 31 and the second edge conductive layer 222 is formed on the entire upper end surface of the second base material 31, and then the first insulating layer 241 is formed on the outer edge portion.
  • Microstructure 23 is formed.
  • a conductive layer is first plated on the entire lower end surface of the first substrate 1, and then the left half of the conductive layer on the first substrate 1 is etched away, leaving the right half of the conductive layer as the first Conductive layer 211. Then, the first edge conductive layer 212 is provided all around the outer edge of the lower end surface of the first substrate 1 .
  • the lower end surface of the first base material 1 and the upper end surface of the second base material 31 are frame-laminated. Specifically, first put a circle of double-sided tape on the outermost edge of the first insulating layer 241 to fix the first base material 1 and the second base material 31 , and then inject another circle of double-sided tape inside the double-sided tape. Silicone gel or UV glue is used to further fix the first base material 1 and the second base material 31.
  • 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.
  • the present invention uses three base material layers and combines Combined with the corresponding preparation process and different material parameters, the formed display device can reach an audible sound pressure level of 70-80db at 1KHz.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Position Input By Displaying (AREA)

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、发声层、第二基材层和第三基材层，发声层位于第一基材和第二基材层之间，且与第一基材和第二基材层配合形成相间隔设置的发声区和非发声区，第二基材层和第三基材层配合形成相间隔设置的触控区和非触控区，发声区和触控区相错位设置。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、发声层、第二基材层和第三基材层，所述发声层位于第一基材和第二基材层之间，且与第一基材和第二基材层配合形成相间隔设置的发声区和非发声区，所述第二基材层和第三基材层配合形成相间隔设置的触控区和非触控区，所述发声区和所述触控区相错位设置。
在一优选实施例中，所述发声层包括第一电极、第二电极和微结构，所述第一电极位于所述发声区且形成于第一基材与第二基材层相对的下端面上，所述第二电极位于所述发声区且形成于第二基材层与第一基材相对的上端面上，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层进行边框贴合。
在一优选实施例中，所述微结构设置于发声区，或者所述发声区和非发声区均设置所述微结构。
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，所述第一导电层位于发声区且形成于第一基材与第二基材层相对的下端面上，所述第一边缘导电层至少形成于第一导电层的边缘；所述第二导电层位于发声区且形成于第二基材层与第一基材相对的上端面上，所述第二边缘导电层至少形成于第二导电层的边缘。
在一优选实施例中，所述发声层还包括绝缘层，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层与第一基材相对的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层相对的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，所述第二基材层包括第二基材和第三导电层，所述第三导电层形成于所述第二基材与第三基材层相对的下端面上且位于触控区；所述第三基材层包括第三基材和第四导电层，所述第四导电层形成于所述第三基材与所述第二基材相对的上端面上且位于触控区。
优选地，所述第一绝缘层的外边缘上设置有边缘固定区，所述第一基材的下端面和第一绝缘层的上端面通过所述边缘固定区进行边框贴合。
优选地，所述边缘固定区包括位于外侧的定区和位于内侧的非定区，所述定区采用双面胶，所述非定区采用硅胶或者UV胶。
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。
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、本发明通过用三层基材层，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、发声层，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、第二基材层，31、第二基材，32、第三导电层，4、第三基材层，41、第三基材，42、第四导电层，5、边缘固定区。
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、发声层2、第二基材层3和第三基材层4，且第一基材1、发声层2、第二基材层3和第三基材层4配合形成一边为发声单元，一边为触控单元，实现显示屏在能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、23um或50um。
结合图2和图3所示，发声层2位于第一基材1和第二基材层3之间，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，第一导电层211形成于第一基材1与第二基材层3相对的下端面上，具体占第一基材1下端面的一部分，如占第一基材1下端面的右边一半，也就是说，第一基材1的下端面的左边一半不设置导电层，右边一半则形成第一导电层211。制备时，可以先 在第一基材1的下端面上先一整面镀一层导电层，然后将第一基材1的左边一半的导电层刻蚀掉，保留右边一半的导电层作为第一导电层211。当然在其他实施例中，第一导电层211不限于占第一基材1的一半布置，可以根据实际需求，设置第一导电层211在第一基材1上的分布区域大小。
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(可以除与左边无导电层的一边相邻的那一边缘)一圈设置第一边缘导电层212。当然也可以沿着第一基材1下端面的外边缘一圈都设置第一边缘导电层212。其中，第一基材1、第一导电层211和第一边缘导电层212构成发声层2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，第二导电层221形成于第二基材层3与第一基材1相对的上端面上，具体占第二基材层3上端面的一部分，如占第二基材层3上端面的右边一半，也就是说，第二基材层3的上端面的左边一半不设置导电层，右边一半则形成第二导电层221。制备时，可以先在第二基材层3的下端面上先一整面镀一层导电层，然后将第二基材层3的左边一半的导电层刻蚀掉，保留右边一半的导电层作为第二导电层221。当然在其他实施例中，第二导电层221不限于占第二基材层3上端面的一半布置，可以根据实际需求，设置第二导电层221在第二基材层3上的分布区域大小。
第二边缘导电层222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(可以除与左边无导电层的一边相邻的那一边缘)一圈设置第二边缘导电层222。当然也可以沿着第二基材层3上端面的外边缘一圈都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形成于第二基材层3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整面覆盖住第二基材层3的上端面及第二导电层221。第一边缘绝缘层242形成于第一基材1与第二基材层3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沿着第一边缘导电层212设置且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层3的上端面均整面设置绝缘层，或者在第二基材层3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的高度可为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层3的上端面上，具体设置于第一绝缘层241的上端面上。优选设置有第一绝缘层241的上端面上。实施时，微结构23可以只设置于第一绝缘层241的右边一半，也可以在第一绝缘层241(除边框边缘处)的上端面上均设置微结构23。实施时，微结构23的高度可为12um～18um，大小为80～100um。
第二基材层3包括第二基材31和第三导电层32，其中，第三导电层32形成于第二基材31与第三基材层4相对的下端面上，具体占第二基材31下端面的一部分，如占第二基材31下端面的左边一半，也就是说，第二基材31的下端面的右边一半不设置导电层，左边一半则形成第三导电层32。制备时，可以先在第二基材31的下端面上先一整面镀一层导电层，然后将第二基材31 的右边一半的导电层刻蚀掉，保留左边一半的导电层作为第三导电层32。当然在其他实施例中，第三导电层32不限于占第二基材31的一半布置，可以根据实际需求，设置第三导电层32在第二基材31上的分布区域大小。
第三基材层4包括第三基材41和第四导电层42，其中，第四导电层42形成于第三基材41与第二基材31相对的上端面上，具体占第三基材41上端面的一部分，如占第三基材41上端面的左边一半，也就是说，第三基材41的上端面的右边一半不设置导电层，左边一半则形成第四导电层42。同样的，制备时，可以先在第三基材41的下端面上先一整面镀一层导电层，然后将第三基材41的右边一半的导电层刻蚀掉，保留左边一半的导电层作为第四导电层42。当然在其他实施例中，第四导电层42不限于占第三基材41的一半布置，可以根据实际需求，设置第四导电层42在第三基材41上的分布区域大小。
第二基材层3的下端面和第三基材层4的上端面之间做贴合，具体采用胶粘贴合，为了保证厚度最低，同时减少因第二基材31的第三导电层43和第三基材41的第四导电层42之间的高度差造成的贴合气泡，一般可使用厚度为23um以上的胶体贴合，胶体可选用OCA(Optically Clear Adhesive，光学双面胶)胶或者OCR(Optical Clear Resin，液体光学胶)胶。
其中，上述第二基材31、第二导电层221、第二边缘导电层222、第一绝缘层241、微结构23构成发声层2的非振动层。发声层2的振动层和非振动层之间采用边框贴合，具体是指第一基材1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5，边缘固定区5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。
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32和第四导电层42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、发声层2和第二基材31配合形成相间隔设置的发声区和非发声区，本实施例中，即左边一半是非发声区(即不发声)，右边一半是发声区。第二基材层3和第三基材层4配合形成相间隔设置的触控区和非触控区(即不可触控)，本实施例中，即左边一半是触控区，右边一半是非触控区。也就是说，触控区位于左边，发声区位于右边，这样整体形成的触控发声显示单元的左边一半为有效触控部分，右边一半为有效发声部分，两部分在左右方向是相错位设置的，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，高度为12um～18um、80um～100um的微结构23，及高度为5um～15um的第一绝缘层241，在1kHz处声压可达到70～80db。
在其他实施例中，也可以在第二基材31的上表面增加盖板(图未示)，在盖板的上表面上形成第二导电层221，又或者将第二导电层221单独做在一个独立的基材的上端面上，然后再将增加的基材与第二基材31的上表面贴合。
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，在第二基材31的下端面上部分形成第三导电层32，并在第三基材41的上端面上部分形成第四导电层42，之后将第二基材31的下端面与第三基材41的上端面进行贴合。
具体地，可以先在第二基材31的下端面上先一整面镀一层导电层，然后将第二基材31的右边一半的导电层刻蚀掉，保留左边一半的导电层作为第三导电层32。同样的，可以先在第三基材41的下端面上先一整面镀一层导电层，然后将第三基材41的右边一半的导电层刻蚀掉，保留左边一半的导电层作为第四导电层42。之后再将第二基材层3的下端面和第三基材层4的上端面之间采用OCA胶或者OCR胶做整面贴合。
S2，在第二基材41的上端面上部分形成第二导电层221，在第二导电层221的边缘形成第二边缘导电层222，之后在第二基材31的上端面上形成第一绝缘层241，之后在第一绝缘层241上形成微结构23。
具体地，可以先在第二基材层3的下端面上先一整面镀一层导电层，然后将第二基材层3的左边一半的导电层刻蚀掉，保留右边一半的导电层作为第二导电层221。之后在第二基材层3上端面的外边缘一圈做第二边缘导电层 222。之后在第二基材31的上端面的整面上形成覆盖住第二基材31的上端面和第二边缘导电层222的第一绝缘层241，之后再在第一绝缘层241除外边缘部分形成微结构23。
S3，在第一基材1的下表面上部分形成第一导电层211，在第一导电层211的边缘形成第一边缘导电层222，在第一边缘导电层222上形成第一边缘绝缘层242，之后将第一基材1的下端面与第二基材31的上端面进行边框贴合。
具体地，先在第一基材1的下端面上先一整面镀一层导电层，然后将第一基材1的左边一半的导电层刻蚀掉，保留右边一半的导电层作为第一导电层211。之后沿着第一基材1下端面的外边缘一圈都设置第一边缘导电层212。
之后将第一基材1的下端面与第二基材31的上端面进行边框贴合。具体地，先在第一绝缘层241的最外边缘贴一圈双面胶，用于将第一基材1和第二基材31先位置固定，再在双面胶的内侧再注入一圈硅胶或者UV胶，用于进一步将第一基材1和第二基材31进一步固定住。
优选地，在将第二基材和第三基材贴合时以及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、本发明通过用三个基材层，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、发声层、第二基材层和第三基材层，所述发声层位于第一基材和第二基材层之间，且与第一基材和第二基材层配合形成相间隔设置的发声区和非发声区，所述第二基材层和第三基材层配合形成相间隔设置的触控区和非触控区，所述发声区和所述触控区相错位设置。
  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，所述发声层包括第一电极、第二电极和微结构，所述第一电极位于所述发声区且形成于第一基材与第二基材层相对的下端面上，所述第二电极位于所述发声区且形成于第二基材层与第一基材相对的上端面上，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层进行边框贴合。
  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，所述微结构设置于发声区，或者所述发声区和非发声区均设置所述微结构。
  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，所述第一导电层位于发声区且形成于第一基材与第二基材层相对的下端面上，所述第一边缘导电层至少形成于第一导电层的边缘；所述第二导电层位于发声区且形成于第二基材层与第一基材相对的上端面上，所述第二边缘导电层至少形成于第二导电层的边缘。
  5. 如权利要求4所述的一种触控发声显示单元，其特征在于，所述发声层还包括绝缘层，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层与第一基材相对的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层相对的下端面上且至少覆盖住所述第一边缘导电层。
  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，所述第二基材层包括第二基材和第三导电层，所述第三导电层形成于所述第二基材与第三基材层相对的下端面上且位于触控区；所述第三基材层包括第三基材和第四导电层，所述第四导电层形成于所述第三基材与所述第二基材相对的上端面上且位于触控区。
  7. 如权利要求5所述的一种触控发声显示单元，其特征在于，所述第一绝缘层的外边缘上设置有边缘固定区，所述第一基材的下端面和第一绝缘层的上端面通过所述边缘固定区进行边框贴合。
  8. 如权利要求7所述的一种触控发声显示单元，其特征在于，所述边缘固定区包括位于外侧的定区和位于内侧的非定区，所述定区采用双面胶，所述非定区采用硅胶或者UV胶。
  9. 如权利要求6所述的一种触控发声显示单元，其特征在于，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。
  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。
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