Specific embodiment
The advantages of the present invention is further explained below in conjunction with attached drawing and specific embodiment.
Here exemplary embodiment will be illustrated in detail, example is illustrated in the accompanying drawings.Following description is related toDuring attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar element.Following exemplary embodimentDescribed in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appendedThe example of the consistent device and method of some aspects being described in detail in claims, of the invention.
It is only merely for the purpose of description specific embodiment in terminology used in the present invention, is not intended to limit the invention.Packet is also intended in the present invention and " one " of singulative used in the attached claims, " one kind ", " described ", "the" etc.Most forms are included, unless context clearly shows that other meanings.It is also understood that term "and/or" used herein isRefer to and any or all may be combined comprising one or more associated list items purposes.
In the description of the present invention, it is to be understood that term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear",The orientation or position relationship of the instructions such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " is based on attached drawing institutesThe orientation or position relationship shown is for only for ease of the description present invention and simplifies description rather than instruction or imply signified dressIt puts or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limit of the inventionSystem.
In the description of the present invention, unless otherwise prescribed and limit, it should be noted that term " connection ", " setting "," formation ", " being equipped with " etc. should be interpreted broadly, for example, it may be inside mechanical connection or electrical connection or two elementsConnection, can be directly connected, can also be indirectly connected by intermediary, for those of ordinary skill in the artSpeech can understand the concrete meaning of above-mentioned term as the case may be.
The display screen sound-producing device of the present invention can be applied to intelligent terminal, and intelligent terminal can come real in a variety of mannersIt applies.For example, intelligent terminal described in the present invention can be (a including such as mobile phone, smart phone, laptop, PDAPersonal digital assistant), PAD (tablet computer), PMP (portable media player), navigation device, smartwatch etc. mobile endEnd and the fixed terminal of number TV, desktop computer etc..Hereinafter it is assumed that terminal is mobile terminal, and assume the movementTerminal is smart mobile phone, and the present invention will be described.However, it will be understood by those skilled in the art that in addition to being used in particular for movingExcept the element of dynamic purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.For ease ofDescription, the embodiment of the present invention are illustrated by taking smart mobile phone as an example, and other application scene is cross-referenced.
With reference to figure 1- Fig. 4, display screen sound-producing device of the invention, the display screen sound-producing device includes：Housing 10,Form the display screen 11 on 10 1 surface of housing, the excitation in the housing 10 below the display screen 11Device 14；
The driver 14 drives the display screen 11 in the vertical vibration sounding of the display screen 11.
In a preferred embodiment, the housing 10 includes the rear cover 12 for forming the apparent surface of the display screen 11；
It is equipped between lid 12 and the display screen 11 in the rear and is parallel to the rear cover 12 and the display screen 11Middle plate 13.
In a preferred embodiment, the middle plate 13 is suitable with the distance of the rear cover 12 and the display screen 11.
In a preferred embodiment, the driver 14 be set on the middle plate 13 on, positioned at the rear cover 12 with it is described inBetween plate 13.
By taking smart mobile phone as an example, which is applied in smart mobile phone, which includesBy the housing 10 for forming outermost contouring, the airframe components of smart mobile phone are wrapped in interior by housing 10；It is further comprised in housing 10Mainboard, as the control circuit of installation smart mobile phone and the device of power supply circuit, mounted on the inside of housing 10, size is less thanThe space of housing 10, and lie in the space of housing 10.
Housing 10 further comprises a display screen 11, shows that the inner surface of screen 11 is corresponding with mainboard, and is electrically connected with mainboardIt connects, shows the outer surface of screen 11, is i.e. display interface outwardly, forms a full surface for housing 10 (for showing screen comprehensively)Or part surface.
Housing 10 includes the rear cover 12 for also forming the apparent surface for showing screen 11, between rear cover 12 and display screen 11Equipped with being parallel to rear cover 12 and showing the middle plate 13 of screen 11, middle plate 13 is suitable with the distance of rear cover 12 to display screen 11, willHousing 10 is divided to two parts roughly the same for volume, and driver 14 is set on middle plate 13, between rear cover 12 and middle plate 13,Driving shows vertical vibration sounding of the screen 11 in display screen 11.
In a preferred embodiment, the display screen 11 includes showing the display area 15 of picture and positioned at describedThe non-display area 16 on 15 periphery of display area.
In a preferred embodiment, the driver 14 is located under the non-display area 16 of the display screen 11Side, drives 16 vibration sounding of non-display area.
In a preferred embodiment, it is equipped between the driver 14 and the non-display area 16 described sharp for transmittingThe transmission parts of the driving force of device 14 are encouraged, the driver 14 is fixed in described transmission parts one end, and the other end is fixed on describedNon-display area 16, the non-display area 16 include principal oscillation region and the slave vibration area around the principal oscillation region,The transmission parts are fixed on the principal oscillation region, and the thickness of the display screen 11 residing for the principal oscillation region is less than describedFrom the thickness of the display screen 11 residing for vibration area.
Show that screen 11 includes the display area 15 for showing picture and the non-display area positioned at 15 periphery of display areaDomain 16, the driving of driver 14 show 16 vibration sounding of non-display area of screen 11.Between driver 14 and non-display area 16Equipped with for transmitting the transmission parts of the driving force of driver 14, driver 14 is fixed in transmission parts one end, and the other end is fixedIn non-display area 16, non-display area 16 includes principal oscillation region and the slave vibration area around the principal oscillation region, instituteState transmission parts and be fixed on the principal oscillation region, the thickness of the display screen 11 residing for the principal oscillation region be less than it is described fromThe thickness of display screen 11 residing for vibration area.In this way, the thickness of glass residing for principal oscillation region is thinning, rigidity becomes smaller, so as to be more prone to deform, and then the displacement of bigger is generated, therefore, under an equal amount of driving force, acoustic pressure can be sent outHigher sound.
In a preferred embodiment, display area 15 and including glassy layer, display module layer and positioned at the glassy layer showShow the touch sensitive layer between module layer, the non-display area 16 only includes glassy layer.
Display area 15 includes glassy layer, display module layer and the touch sensible between glassy layer and display module layerLayer, non-display area 16 only include glassy layer.
In a preferred embodiment, the driver 14 is to be parallel to the linear motor that the display screen 11 is unfolded.
The construction of general motor is intermediate one and carries " rotor " (Rotor) rotary axis, and surrounding is then " stator "(Stator), magnetic field can be generated by having filled after coil is powered.So-called linear motor gives after exactly motor is cut in the axial directionWith expansion, the rotary motion of motor is made to become moving along a straight line, therefore referred to as linear motor.The operation principle of driver 14 is similar toLinear motor is unfolded after motor is cut along smart mobile phone Z-direction (perpendicular to the direction of display screen 11), is led toCross the vibration of the vibrating mass of Z-direction, push showing that screen 11 is front and rear and vibrate, display screen 11 at this time that is, before byThe vibrating diaphragm of device is talked about, display screen 11 is front and rear to be vibrated, and air vibration is pushed to carry out sounding.
Linear motor (linear motor)
Linear motor be it is a kind of electric energy is directly changed into linear motion mechanical energy, without any intermediate conversion mechanismTransmission device.It can regard an electric rotating machine as by radially splitting, and transform into plane and form.Without switching mechanismLinear motion is directly obtained, without the abrasion of gearing, and low noise, simple in structure, convenient operating maintenance.
Linear motor is often briefly described and is flattened for electric rotating machine, and operation principle is identical.Mover is to use epoxy materialCoil compression is together manufactured；Track is that magnet (being typically the rare-earth magnet of high-energy) is fixed on steel.MotorMover includes coil windings, Hall element circuit board, electro-hot regulator (temperature sensor monitors temperature) and electrical interface.It is revolvingIn rotating motor, mover and stator need swivel bearing support mover to ensure the air gap of relative motion part (airgap).Equally, linear motor needs the linear guide to keep the position in the magnetic field that mover generates in track.With the volume of rotating servo motorCode device is mounted on an axle that feedback position is the same, and linear motor needs to feed back feedback device -- the linear encoder of linear position, itThe position of load can directly be measured so as to improve the positional precision of load.
The control of linear motor is as electric rotating machine.As brushless rotary motor, mover and stator are without mechanical connection (nothingBrush), unlike the aspect of electric rotating machine, mover rotation and position of stator remains fixed, linear induction motor system can be track move orThrust coil moves (most of alignment system application is that track is fixed, and thrust coil moves).With the motor of thrust coil movement, thrustThe weight of coil and duty factor very little.However, it is necessary to high flexibility cable and its management system.The motor moved with track, not onlyIt bears to load, still suffers from track quality, but without cable management system.
Similar electro-mechanical principle is on straight line and electric rotating machine.Identical electromagnetic force generates torque on electric rotating machine and existsLinear motor generates linear thrust effect.Therefore, linear motor uses the control identical with electric rotating machine and programmable configuration.
Primary is known as by the side that stator develops, secondary is known as by the side that rotor develops.In practical applicationWhen, primary and secondary is manufactured into different length, to ensure that the coupling in required stroke range between primary and secondary is protectedIt holds constant.Linear motor can be short primary long secondary or long primary short secondary.In view of manufacture cost, running costWith by taking linear induction motor as an example：When armature winding is passed through AC power, travelling-magnetic-field is just generated in air gap, it is secondaryUnder traveling wave magnetic field intercepts, electromotive force will be induced and generate electric current, which just generates electricity with the magnetic field phase separation in air gapMagnetic thrust.If primary is fixed, secondary moves in a straight line under thrust；Conversely, then primary moves in a straight line.Straight-line electricOne linear motor application system of Drive Control Technique of machine will not only have linear motor of good performance, it is necessary to which having can beTechnology and the control system of economic requirement are realized under conditions of safe and reliable.With automatic control technology and micro-computer technologyDevelopment, the control method of linear motor are more and more.
Three aspects can be substantially divided into the research of linear motor control technology：When Traditional control technology, second is thatModern control technology, third, intelligent control technology.Traditional control technology such as PID/feedback control, decoupling control etc. are watched in exchangeIt is widely used in dress system.Wherein PID control contains the information in dynamic control process, has stronger robustProperty, it is control mode most basic in AC servo machinery driving system.In order to improve control effect, often using decoupling controlAnd vector control technology.Determine in object model, do not change and be linear and operating condition, running environment be to determine it is constantUnder conditions of, it is simple and effective using Traditional control technology.But in the high performance applications of high-precision Fine Feed, must just examineConsider the variation of object structure and parameter.Various nonlinear influences, the time-varying such as the change of running environment and environmental disturbances and not reallyDetermine factor, can just obtain satisfied control effect.Therefore, cause in the research that modern control technology is controlled in linear servo-actuatorVery big attention.Common control method has：Self adaptive control, Sliding mode variable structure control, robust control and intelligent control.MainlyIt is to be combined fuzzy logic, neural network with the control method of the existing maturations such as PID, H ∞ control, learns from other's strong points to offset one's weaknesses, to obtainObtain better control performance.
Linear motor may be considered a kind of deformation of the electric rotating machine in configuration aspects, it can be regarded as an electric rotatingMachine is radially splitted, and is then evened up and is developed.With automatic control technology and the high speed development of microcomputer, to all kinds ofThe positioning accuracy of automatic control system proposes higher requirement, and in this case, traditional electric rotating machine is along with a set ofThe actuating device of the linear motion of mapping device composition, far from the requirement for meeting modern control system, for this purpose, the world is manyCountry is all in research, development and applicable line motor so that the application field of linear motor is more and more wider.
Linear motor mainly has following several features compared with electric rotating machine：When it is simple in structure, due to linear motor notNeed the rotation motion to be in line the attachment device of movement, so that the structure of system in itself is greatly simplified, weight and bodyProduct greatly declines；Second is that positioning accuracy is high, in the place that needs move along a straight line, linear motor can realize direct-drive, becauseAnd various position errors caused by intermediate link can be eliminated, therefore positioning accuracy is high, is such as controlled using microcomputer, then it can also be bigThe earth improves the positioning accuracy of whole system；Third, reaction speed is fast, high sensitivity, trackability is good.Linear motor is easily able toIts mover is supported with magnetic suspension, so that remaining certain air gap between mover and stator without contacting, this is just eliminatedContact frictional resistance between fixed and moving son, thus greatly increase sensitivity, rapidity and the trackability of system；Fourth, workMake safe and reliable, long lifespan.Linear motor can realize non contact transmission power, and mechanical friction loss is almost nil, so failureIt is few, freedom from repairs, thus safe and reliable, long lifespan.
Linear motor is mainly used in three aspects：First, applied to automatic control system, this kind of application scenario is relatively more；Secondly the driving motor as long-term continuous operation；Third, applying is needing the short time, is providing huge straight line in short distanceIn the device for moving energy.
High-speed maglev train magnetic suspension train is the most typical example of linear motor practical application, American and Britain, day, method,The states such as moral, Canada are all developing linear suspended train, wherein Japan's progress is most fast.
First using the elevator that linear motor drives is to be installed on to the elevator of linear motor driving April nineteen ninety in the worldTokyo, Japan Feng Dao areas all ages building, the elevator loading 600kg, speed 105m/min, hoisting depth 22.9m.Due toThe elevator of linear motor driving does not have traction unit, thus the computer room on building top can omit.If the height of building increases to1000 meters or so, no steel wire rope elevator must be just used, this elevator is driven using the linear motor of high temperature superconductor technology, coilIn hoistway, equipped with high performance permanent magnetic materials outside car, as magnetic suspension train is the same, using radio wave or light control techniquesControl.
Super high speed electric machine will generate sintering, damage when rotation is more than a certain limit, using the motor of rolling bearingBad phenomenon, foreign countries have developed a kind of linear suspended motor (electromagnetic bearing), and the mover for making motor using suspension technology is suspended inIn the air, eliminate the Mechanical Contact and frictional resistance between mover and stator, rotating speed up to 25000~100000r/min withOn, thus be widely used on high-speed motor and high speed spindle unit.As day intrinsic safety river company develop recently it is moreProcess automatic numerical control lathe uses two radial magnetic bearings and an axial thrust electromagnetism with 5 axis controllable type electromagnetism high-speed main spindlesBearing, can in any direction on bear the load of lathe.In the centre of axis, in addition to equipped with high-speed motor, it is also equipped with and moreThe tool automatic switch-board structure that process automatic numerical control lathe is adapted.
Linear motor is also referred to as linear electric machine, linear motor, line motor, pusher motor.Most common linear motor typeIt is flat, U-type groove formula and tubular type.The typical composition of coil is three-phase, has Hall element to realize brushless commutation.
1st, tablet
There are three types of the flat-plat type linear motors (being brushless) of type：Slotless iron-core-free, slotless is cored and has slot to have ironCore.It is needed during selection according to the understanding to application requirement.
Slotless iron-core-free tablet motor is that a series of coils are mounted on an aluminium sheet.Since FOCER does not have iron core, electricityMachine does not have suction and connector effect (same with U-lag motor).The design contributes to extend bearing life in certain certain applications.Mover can be from above or side installation is to be suitble to most of applications.To requiring control speed, smoothly application is reason to this motorThink.Application is such as scanned, but the thrust output that the design of tablet track generates is minimum.In general, tablet track has high magnetic fluxLeakage.So operation with caution is needed to be hindered to prevent operator by between them with other by the magnetic force attraction between suction materialEvil.
Slotless is cored：It is similar with slotless iron-core less motor on the cored tablet electric machine structure of slotless.In addition to iron core is installedIt is installed in steel lamination and then again on aluminium backboard, iron lamination, which is used in, guides magnetic field and increase thrust.Track and moverBetween the thrust that generates of the suction that generates and motor it is directly proportional, lamination causes connector power to generate.Mover is installed to trackIt must be carefully in order to avoid the suction between them damages when upper.Slotless is cored to have pushing away for bigger than slotless iron-core less motorPower.
There is the slot cored：Such linear motor, ironcore choke are put into a steel construction to generate iron core lineCoil unit.Iron core effectively enhances the magnetic field that the thrust output of motor is generated by focus coil.It is strong between core armature and trackBig attraction can be used as the preload of Air bearing system in advance.These power can increase the abrasion of bearing, magnetPhase difference can reduce connector power.
2nd, U-type groove formula
There are two between metallic plate and all against the parallel track of coil mover for U-type groove formula linear motor.Mover byGuide track system is supported among two tracks.Mover is non-steel, it is meant that no suction and between track and thrust coil without dryDisturb power generation.Non- steel coil assembling has inertia small, allows very high acceleration.Coil is usually three-phase, brushless commutation.Motor can be cooled down with air-cooling to obtain the enhancing of performance.Also have using water-cooling pattern.This design can be preferableMagnetic flux leakage is reduced because magnet is mounted in U-shaped guide groove face-to-face in ground.This design also minimizes powerful magnetic force and attractsThe injury brought.
The track of this design allows combination to increase stroke length, is confined to the operable length of cable management systemThe ability of degree, the length of encoder and the big and flat structure of mechanical realization..
3rd, it is cylindrical
The dynamic magnet linear motor rotor of cylinder is cylindrical structure.It is moved along the cylinder in fixed magnetic field.This electricityMachine is that the business application being originally found cannot still be used in the flat field with U-type groove formula linear motor in requirement section space-efficientIt closes.The magnetic circuit of the dynamic magnet linear motor of cylinder is similar to dynamic magnetic executor.It can replicate to increase stroke difference lies in coil.Typical coil windings are three phase compositions, and brushless commutation is realized using Hall device.Thrust coil is cylindrical, along bar magnetIt moves up and down.This structure is not suitable for the application to flux leakage sensitivity.Must careful operation ensure finger be not stuck in bar magnet andBetween attractive side.
One of tubular linear design of electrical motor appears in the problem of potential, when stroke increase, since motor is complete cylinderAnd move up and down along bar magnet, unique supporting point is at both ends.Ensure that the radial missing of bar magnet is unlikely to that magnet is caused to connectThe length for touching thrust coil is always restricted.
The advantages of linear motor：
Before linear motor that is practical and affording occurs, all linear motions are had to from rotating machinery by makingIt is converted with ball or roller screw or band or pulley.To many applications, it is vertical plane such as to encounter heavy load and drive shaft's.These methods are still best.However, linear motor has many unique advantages than mechanical system ratio, such as very at a high speedVery low speed, high acceleration, almost zero dimension shield (contactless part), high-precision, no backlash.Completing linear motion only needs motorWithout gear, shaft coupling or pulley are meaningful for much applying, those are unnecessary, lower performance and shorteningThe part of mechanical life eliminates.
(1) it is simple in structure.Pipe-shape straight-line motor needs not move through intermediate conversion mechanism and directly generates linear motion, makes knotStructure greatly simplifies, and movement inertia is reduced, and dynamic response performance and positioning accuracy greatly improve；Reliability is also improved simultaneously, is savedAbout cost makes manufacture and safeguards easier.Its primary and secondary can be directly becoming a part for mechanism, this unique knotIt closes so that this advantage further embodies.
(2) it is suitble to high-speed straight-line movement.Because there is no the constraint of centrifugal force, common material can also reach higher speedDegree.If primary and secondary preserves gap with air cushion or magnetic pad, without Mechanical Contact during movement, thus motion parts are also with regard to nothingFriction and noise.In this way, transmission parts are not worn, mechanical loss can be greatly reduced, avoids towing cable, cable wire, gear and skinNoise caused by belt wheel etc., so as to improve whole efficiency.
(3) armature winding utilization rate is high.In pipe-shape straight-line induction machine, armature winding is cake formula, without end aroundGroup, thus winding utilization is high.
(4) without transverse edge effect.Transversal effect refers to the weakening in boundary magnetic field caused by due to laterally cut-offfing, and justifiesTubular linear motor is laterally without cut-offfing, so magnetic field is uniformly distributed circumferentially.
(5) easily against unilateral magnetic force problem.Radial pull offsets each other, and is substantially not present asking for unilateral magnetic forceTopic.
(6) it can easily be accommodated and control.By adjusting voltage or frequency or replacing secondary materials, different speed can be obtainedDegree, electromagnetic push, occasion is back and forth run suitable for low speed.
(7) it is adaptable.The primary iron core of linear motor can with epoxy resin seal it is integral, have preferable anti-corrosion,Humidity resistance, convenient for being used in the environment of moist, dust and pernicious gas；And can be designed to various structures, meet notWith the needs of situation.
(8) high acceleration.This is linear motor driving, compared to one of other leading screws, synchronous belt and gear-rack driveSignificant advantage.
Linear motor selects specification to have software under normal conditions as auxiliary tool primarily with respect to the selection of thrust.ForThe thrust of accurate selection linear motor, needs to know load weight, effective travel, maximum speed and peak acceleration.AuxiliaryIn Selection Software, you can select the motor of suitable thrust.
Driver
Driver is a kind of harmonic oscillator, using the psychoacoustic characteristics of people, voice signal is modified and is beautifiedSonication equipment.By increasing a variety of methods such as high-frequency harmonic ingredient to sound, sound quality can be improved, tone color, improve soundPenetration power, increase the spatial impression of sound.Modern driver can not only create high-frequency harmonic, but also with low frequency extensionWith the functions such as music style, make that bass effect is more perfect, music has more expressive force.
The clarity of sound, the property understood and expressive force are improved using driver.Make sound more melodized, reduce auditionFatigue increases loudness.Although driver only increases the harmonic components of 0.5dB or so to sound, actually sound, volume is goodAs increasing 10dB or so.Make the hearing loudness of sound significantly increase, the three-dimensional sense of audiovideo and the separating degree of soundIncrease；Localization of sound and stereovision are improved, the sound quality for resetting sound, the replication rate of tape can also be improved.Because sound is believedNumber transmit and recording process in can lose high-frequency harmonic ingredient, there is high-frequency noise.At this time the former with driver first to signalIt compensates, after the latter's available filters filter high-frequency noise, then builds treble contribution, ensure to reset sound quality.DriverAdjusting sound man is needed to differentiate the sound quality and tone color of system, be adjusted further according to evaluation of subjective acoustic level.
It should be noted that the embodiment of the present invention has preferable implementation, and not the present invention is made any type ofLimitation, any one skilled in the art change or are modified to possibly also with the technology contents of the disclosure above equivalent effectiveEmbodiment, as long as without departing from the content of technical solution of the present invention, what technical spirit according to the present invention made above exampleAny modification or equivalent variations and modification, in the range of still falling within technical solution of the present invention.