CN1997243B - Pliable loudspeaker and its making method - Google Patents
Pliable loudspeaker and its making methodDownload PDFInfo
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Abstract
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Translated fromChinese技术领域technical field
本发明涉及一种声音产生装置，尤其涉及一种可挠式扬声器及其制法。The invention relates to a sound generating device, in particular to a flexible loudspeaker and its manufacturing method.
背景技术Background technique
在产业追求轻薄短小及多功能化的产品发展趋势下，为了提高产品的市场竞争力，产业界都希望应用先进技术来开发及制造产品。Under the development trend of the industry pursuing light, thin, small and multi-functional products, in order to improve the market competitiveness of products, the industry hopes to apply advanced technology to develop and manufacture products.
以扬声器(Loudspeaker)来说，扬声器的发声原理是通过电信号的产生来震动振膜而产生声音，所发出的声音较有变化且可以发出音乐，并可应用于诸如平面显示器、笔记本型计算机、行动电话、个人数字助理(PDA)、及数字相机等消费性电子产品，而其中诸如平面显示器正为目前利用可挠性电子(Flexible Electronics)技术全力发展的产品；亦即，通过可挠式塑料或薄金属基板等可挠性电子组件制作出相关电子产品。由于应用此种可挠性电子技术所制造的产品具有重量轻、成本极低廉与耐冲击等特性，不仅极具发展价值，更可增加设计人员在产品外型上的想象空间及使用者携带上的便利性，预期此技术将为产业结构和人类生活带来革命性的变化。Take the loudspeaker (Loudspeaker), the sounding principle of the loudspeaker is to vibrate the diaphragm through the generation of electrical signals to produce sound. Consumer electronic products such as mobile phones, personal digital assistants (PDAs), and digital cameras, among which flat-panel displays are currently being fully developed using flexible electronics (Flexible Electronics) technology; that is, through flexible plastic or thin metal substrates and other flexible electronic components to produce related electronic products. Because the products manufactured by applying this kind of flexible electronic technology have the characteristics of light weight, extremely low cost and impact resistance, they are not only of great development value, but also can increase the imagination space of designers in terms of product appearance and user portability. It is expected that this technology will bring revolutionary changes to the industrial structure and human life.
再就扬声器的类型来说，可依驱动方式将扬声器概略分为诸如动圈式(Dynamic)扬声器、压电式(Piezoelectric)扬声器、及静电式(Electrostatic)扬声器等三种。In terms of the type of the speaker, the speaker can be roughly divided into three types according to the driving method, such as a dynamic speaker, a piezoelectric speaker, and an electrostatic speaker.
动圈式扬声器为目前使用最广、技术成熟的技术，其运动原理是根据佛来明(Fleming)左手定则，利用磁场、电流、力三者成直角相交的相互作用，控制振动膜活塞式的往复运动来驱动空气产生声音，大量运用在各式电视、音响、耳机及手机上。然而，由于动圈式扬声器先天结构的缺点，并无法将体积扁平化，使得此种传统技术无法符合3C产品越来越小及家庭剧院扁平化的趋势的需求。The moving coil loudspeaker is the most widely used and mature technology at present. Its motion principle is based on Fleming's left-hand rule, using the interaction of magnetic field, current and force at right angles to control the diaphragm piston type. The reciprocating motion drives the air to produce sound, which is widely used in various TVs, stereos, earphones and mobile phones. However, due to the shortcomings of the inherent structure of the dynamic speaker, the volume cannot be flattened, making this traditional technology unable to meet the needs of the trend of smaller and smaller 3C products and the flattening of home theaters.
压电式扬声器利用压电材料的压电效应，附加电场于压电材料造 成材料变形的特性，用来推动振膜(Diaphragm)发声。然而，此种传统技术虽然结构可扁平微小化，但受限于压电材料的共振频率偏高且可利用频宽不多，因而令其应用领域受限，目前仅应用在警报器居多。Piezoelectric speakers use the piezoelectric effect of piezoelectric materials, and add an electric field to piezoelectric materials to cause material deformation, which is used to drive the diaphragm (Diaphragm) to produce sound. However, although the structure of this traditional technology can be flat and miniaturized, it is limited by the high resonant frequency of the piezoelectric material and the limited available bandwidth, which limits its application field. Currently, it is mostly used in alarms.
静电式扬声器的作用原理是将两片开孔的固定电极板夹持导电振膜形成电容器(Condenser)，通过供给振膜直流偏压以及两个固定电极同步正反相位的交流电压，利用正负电荷所发生的静电力，带动导电振膜振动并将声音辐射出去。但是，由于此种传统技术供给振膜的偏压需达上百至上千伏特，而必须外接高单价及体积庞大的扩大机，故而不仅耗费能源，且无法轻量化，从而降低产业利用价值。The working principle of the electrostatic loudspeaker is to clamp the conductive diaphragm between two open fixed electrode plates to form a capacitor (Condenser). The electrostatic force generated by the charge drives the conductive diaphragm to vibrate and radiate sound. However, since the bias voltage supplied to the diaphragm by this traditional technology needs to reach hundreds to thousands of volts, a high unit price and bulky amplifier must be connected externally, which not only consumes energy, but also cannot reduce the weight, thereby reducing the industrial utilization value.
同时，与扬声器相关的专利例如包括美国专利公告第3,646,280号案、美国专利公告第3,894,199号案、美国专利公告第3,892,927号案、美国专利公告第3,896,274号案、美国专利公告第3,935,397号案、以及台湾专利公告第234232号案等技术。Meanwhile, patents related to speakers include, for example, U.S. Patent No. 3,646,280, U.S. Patent No. 3,894,199, U.S. Patent No. 3,892,927, U.S. Patent No. 3,896,274, U.S. Patent No. 3,935,397, and Taiwan Patent Announcement No. 234232 and other technologies.
美国专利公告第3,646,280号案揭露一种使用驻极体(Electret)材料的静电式扬声器。此专利的结构主要包括一片导体振膜、一对接着开孔驻极体的电极以及绝缘构件，并以该绝缘构件将该振膜对称夹持在两带电荷驻极体中间。在此专利中，通过运用导电纤维与驻极体接合，可改善驻极体不易粘贴、以及驻极体开孔与背板开孔对位精度不佳等问题，并藉导电纤维密度提供振膜防尘、水气阻绝、调整声阻系数等优点。US Patent No. 3,646,280 discloses an electrostatic speaker using electret material. The structure of this patent mainly includes a conductor vibrating film, a pair of electrodes connected to the perforated electret and an insulating member, and the vibrating film is sandwiched symmetrically between the two charged electrets by the insulating member. In this patent, by using the conductive fiber to bond the electret, it can improve the problem that the electret is not easy to stick, and the alignment accuracy between the opening of the electret and the opening of the back plate is not good, and the density of the conductive fiber provides a diaphragm Dustproof, water vapor barrier, adjustable sound resistance coefficient, etc.
然而，此专利运用需要硬式悬边来固定振膜以使该振膜保有一定张力，借此让该振膜受外力振动后能驱动周遭的空气来产生声音，且开孔背板也为硬式，因而无法制作成可挠式的结构。如此一来，由于此种传统技术不具可挠式功能，故无法应用于采用可挠性电子技术发展的产品。However, this patent application requires a hard suspension to fix the diaphragm so that the diaphragm maintains a certain tension, so that the diaphragm can drive the surrounding air to produce sound after being vibrated by an external force, and the perforated back plate is also rigid. Thereby can't be made into flexible structure. In this way, since this traditional technology does not have a flexible function, it cannot be applied to products developed using flexible electronic technology.
美国专利公告第3,894,199号案揭露一种电声转换器(Electroacoustic Transducer)，在此专利中的两侧驻极体都驻正电荷，感应导体振膜成负电位，可取代原有提供振膜的直流偏压装置。同时，两侧电极从变压器供给同步正反相位交流信号，依静电力公式、与中央振膜的直流偏压作用，产生推-拉(Push-Pull)静电力，推动振膜振动。U.S. Patent No. 3,894,199 discloses an electroacoustic transducer (Electroacoustic Transducer). In this patent, the electrets on both sides are positively charged, and the conductive diaphragm becomes negative potential, which can replace the original diaphragm. DC bias device. At the same time, the electrodes on both sides are supplied with synchronous positive and negative phase AC signals from the transformer. According to the electrostatic force formula and the DC bias effect with the central diaphragm, push-pull (Push-Pull) electrostatic force is generated to push the diaphragm to vibrate.
但是，此专利需要使用变压器供给同步正反相位交流信号，因而装置中需要两组大电容及整流组件；如此一来，不但装置体积庞大，且使用组件较多，成本也较高。同时，应用此种传统技术仍需要使用硬式悬边来固定振膜，且开孔背板也为硬式，同样不具可挠式功能，而限制其应用范围。However, this patent requires the use of a transformer to supply synchronous positive and negative phase AC signals, so two sets of large capacitors and rectification components are required in the device; as a result, the device is not only bulky, but also uses many components, and the cost is also high. At the same time, the application of this traditional technology still needs to use a hard suspension edge to fix the diaphragm, and the perforated back plate is also hard, which also does not have a flexible function, which limits its application range.
美国专利公告第3,892,927号案中揭露一种具有多对相对设置的电极的扬声器。此专利结构为一组分割为不同宽度的电极板，对称地将导电振膜夹持置中，运用不同分割电极与导电振膜间的静电力对应有效面积的影响，造成各分割电极区域振膜第一共振频率不同。如此，便可利用不同电极面积造成不同共振频率，搭配分音器的使用，完成低-高音域的扬声器。US Patent No. 3,892,927 discloses a speaker with multiple pairs of opposite electrodes. This patented structure is a group of electrode plates divided into different widths, and the conductive diaphragm is sandwiched symmetrically, and the effect of the electrostatic force between the different segmented electrodes and the conductive diaphragm is used to correspond to the effective area, resulting in the diaphragm in each segmented electrode area The first resonance frequencies are different. In this way, different electrode areas can be used to generate different resonant frequencies, and the use of a crossover can be used to complete a speaker with a low-high range.
然而，此专利的结构复杂，连带使得所需成本居高不下，故价格较高而无法为一般消费大众所接受。同时，此种传统技术的结构是由许多分割不同宽度电极组成，先天体积庞大，无法适用于诸如助听器或耳机等小型电声组件。此外，由于应用此种传统技术需要额外电压产生直流偏压，较为耗电，且驱动装置也较为庞大复杂及昂贵。另外，此种传统技术仍需运用硬式悬边来固定振膜，且开孔背板也为硬式，故而也不具可挠功能。However, the structure of this patent is complicated, which makes the required cost remain high, so the price is relatively high and cannot be accepted by the general consumer. At the same time, the structure of this traditional technology is composed of many electrodes with different widths, which is inherently bulky and cannot be applied to small electro-acoustic components such as hearing aids or earphones. In addition, because the application of this traditional technology requires an additional voltage to generate a DC bias voltage, it consumes more power, and the driving device is also relatively bulky, complicated and expensive. In addition, this traditional technology still needs to use a hard suspension edge to fix the diaphragm, and the perforated back plate is also hard, so it does not have a flexible function.
美国专利公告第3,896,274号案中提出一种驻极体耳机，是将驻极体整片粘贴在电极中央，并于驻极体周围环设多个钻孔。根据驻极体具有电荷稳定均匀、并且粘贴容易等优点，在此专利中运用一对相对位置的驻极体，感应中央位置振膜成为一直流偏压电位。In US Patent No. 3,896,274, an electret earphone is proposed, in which a whole piece of electret is pasted on the center of the electrode, and a plurality of drilling holes are arranged around the electret. According to the electret has the advantages of stable and uniform charge and easy adhesion, a pair of electrets at opposite positions are used in this patent to induce the diaphragm at the central position to become a DC bias potential.
然而，此专利的开孔并未均匀分布，造成振膜振动压缩空气后声音无法顺利辐射出来，并会在该驻极体与该振膜间的空间产生驻波，使扬声器效率不佳，且会有其它共振形成。另外，此种传统技术也需要运用硬式悬边来固定振膜，且开孔背板仍为硬式，故仍存在前述传统技术的缺失。However, the openings in this patent are not uniformly distributed, causing the diaphragm to vibrate and compress the air, and the sound cannot be radiated smoothly, and standing waves will be generated in the space between the electret and the diaphragm, resulting in poor efficiency of the speaker, and There will be other resonances formed. In addition, this traditional technology also needs to use a hard suspension edge to fix the diaphragm, and the perforated backplane is still rigid, so there are still shortcomings in the aforementioned traditional technology.
美国专利公告第3,935,397号案中提出一种线网栅(Wire Grid)电极静电式扬声器组件，并以绝缘间隔材将振膜对称夹持在两电极体中间。此专利的电极结构是由具有密布沟槽的框架缠绕金属线并绷紧，以形成网栅极板，除了均匀提供静电感应电极给振膜之外，还提供单 体灰尘防护。U.S. Patent No. 3,935,397 proposes a wire grid (Wire Grid) electrode electrostatic speaker assembly, and an insulating spacer is used to sandwich the diaphragm symmetrically between the two electrode bodies. The electrode structure of this patent is a frame with dense grooves that wraps metal wires and tightens them to form a mesh grid plate. In addition to providing static induction electrodes to the diaphragm evenly, it also provides single-body dust protection.
然而，由于此专利的结构需要额外装置产生直流偏压，较为耗电，且驱动装置也较为庞大及昂贵。同时，此种传统技术所应用的网栅结构复杂、价格较高，故而不具量产竞争性，以致无法符合市场需求。另外，传统技术也运用需要硬式悬边来固定振膜，且开孔背板也为硬式，仍存在不可挠而使应用范围狭窄的问题。However, since the structure of this patent requires an additional device to generate a DC bias voltage, it consumes more power, and the driving device is also relatively bulky and expensive. At the same time, the grid structure used in this traditional technology is complicated and the price is high, so it is not competitive for mass production, so that it cannot meet the market demand. In addition, the traditional technology also requires a hard suspension edge to fix the diaphragm, and the perforated backplane is also hard, which still has the problem of being inflexible and narrowing the application range.
台湾专利公告第234232号案中则揭示一种大音压的静电型扬声器装置，通过将外侧电极分割为多段，并以变压器搭配电压调整装置，提供不同分割电极不同的电压。在此专利中，是利用不同的电压与中央导电振膜的直流偏压感应，形成对称外侧大中央小的不等静电力分布，以使振膜的每个位置可均匀位移振动。Taiwan Patent Publication No. 234232 discloses an electrostatic loudspeaker device with large sound pressure. By dividing the outer electrode into multiple segments, and using a transformer with a voltage adjustment device, different voltages are provided for different segmented electrodes. In this patent, different voltages and the DC bias induction of the central conductive diaphragm are used to form a symmetrical unequal electrostatic force distribution with a large center on the outside and a small one in the center, so that each position of the diaphragm can be evenly displaced and vibrated.
然而，由于静电型电声装置的振膜的位移极小，原本就近乎线性的运动，即使运用不等静电力来造成振膜全区域等位移运动，也不能明显地让声音品质提升。而且，此种传统技术的信号驱动放大装置复杂、高价，且体积大、耗电，不适合运用在诸如耳机、助听器、手机等需要微小型扬声器的应用。另外，此种传统技术的运用仍需要硬式悬边来固定振膜，且开孔背板也为硬式，无法制作为可挠式装置。如此，也存在前述专利中的缺失，以致于无法应用在采用可挠性电子技术发展的产品。However, due to the extremely small displacement of the diaphragm of the electrostatic electro-acoustic device, the original nearly linear motion, even if the unequal electrostatic force is used to cause equal displacement of the entire diaphragm area, the sound quality cannot be significantly improved. Moreover, the signal-driven amplifying device of this conventional technology is complex, expensive, bulky, and power-consuming, and is not suitable for use in applications that require tiny speakers such as earphones, hearing aids, and mobile phones. In addition, the application of this traditional technology still requires a hard suspension edge to fix the diaphragm, and the perforated back plate is also hard, which cannot be made into a flexible device. In this way, there are also defects in the aforementioned patents, so that they cannot be applied to products developed using flexible electronic technology.
由于前述传统技术在发音原理上的限制，均须固定悬边来绷紧振膜，不具可挠式功能，而且有着体积较大、构造复杂、成本较高、耗费能源且不利于量产等种种缺失，因此，如何有效解决前揭先前技术所存在的问题，乃成为目前业界亟待克服的课题。Due to the limitation of the above-mentioned traditional technology in the principle of pronunciation, it is necessary to fix the hanging edge to tighten the diaphragm, which does not have a flexible function, and has a large volume, complex structure, high cost, energy consumption, and is not conducive to mass production. Therefore, how to effectively solve the problems existing in the previous technologies disclosed above has become an urgent problem to be overcome in the industry.
发明内容Contents of the invention
鉴于以上所述先前技术的缺点，本发明的目的即在于提供一种具可挠式功能的可挠式扬声器及其制法。In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a flexible speaker with a flexible function and a manufacturing method thereof.
本发明的另一目的在于提供一种可微型化的可挠式扬声器及其制法。Another object of the present invention is to provide a miniaturizable flexible speaker and a manufacturing method thereof.
本发明的再一目的在于提供一种构造简单的可挠式扬声器及其制法。Another object of the present invention is to provide a flexible loudspeaker with simple structure and its manufacturing method.
本发明的又一目的在于提供一种成本低廉的可挠式扬声器及其制法。Another object of the present invention is to provide a low-cost flexible speaker and its manufacturing method.
本发明的又另一目的在于提供一种有利于量产的可挠式扬声器及其制法。Yet another object of the present invention is to provide a flexible loudspeaker and a manufacturing method thereof that are favorable for mass production.
本发明的又再一目的在于提供一种可节约能源的可挠式扬声器及其制法。Yet another object of the present invention is to provide an energy-saving flexible speaker and a manufacturing method thereof.
为达成上述目的及其它目的，本发明提供一种可挠式扬声器及其制法，该可挠式扬声器包括第一及第二振膜、至少一电极、以及第一及第二可挠驱动件。该第一及第二振膜分别具有第一表面及第二表面；该电极至少设于该第一及第二振膜其中一者的第一表面，用于结合该第一振膜与该第二振膜；该第一及第二可挠驱动件则分别设有间隔固定至该第一及第二振膜的第二表面以提供振膜张应力的多个支撑部、以及设于各该支撑部远离该第二表面的一侧以形成发音单体的开孔部，以使输入信号至该第一及第二可挠驱动件时驱动该第一振膜与该第二振膜朝相同方向变形来产生声音。In order to achieve the above and other objectives, the present invention provides a flexible speaker and its manufacturing method. The flexible speaker includes first and second diaphragms, at least one electrode, and first and second flexible driving members . The first and second vibrating membranes respectively have a first surface and a second surface; the electrode is at least provided on the first surface of one of the first and second vibrating membranes, for combining the first vibrating membrane and the second vibrating membrane Two diaphragms; the first and second flexible drivers are respectively provided with a plurality of support parts fixed to the second surface of the first and second diaphragms at intervals to provide tensile stress of the diaphragm, and are arranged on each of the The side of the supporting part far away from the second surface is used to form the opening part of the sounding unit, so that when the input signal is sent to the first and second flexible driving parts, the first diaphragm and the second diaphragm are driven to the same direction. Direction warping to produce sound.
优选地，该第一振膜与该第二振膜为驻极体压电振膜。该第一振膜与该第二振膜为单层及多层介电材料的其中一者所制成的振膜，而该介电材料内部包含纳微米孔洞膜，且该介电材料可为诸如全氟乙烯丙烯共聚合物FEP、聚四氟乙烯PTFE、聚二氯乙烯PVDF、部份含氟高分子聚合物或其它适当材料。其中，该单层介电材料的厚度可为例如1至1000微米的范围间。该电极可为例如导电金属薄膜、银胶、氧化铟锡或其它导电材料所构成。该电极的厚度可为0.01至3微米的范围间，且该电极可为透光材料所制成的电极。在一个优选实施方面中，该电极包括第一电极及第二电极，该第一电极及第二电极的相位差为180度。该第一及第二可挠驱动件也可为透光材料所制成的可挠驱动件，其开孔部呈阵列分布，且各该开孔部的孔径可为不同。在一个优选实施方面中，该第一及第二可挠驱动件为导电金属薄板，且该导电金属薄板可为金属网，令该开孔部为金属网的网格，该支撑部则为该网格的凸出部分。在另一优选实施方面中，该第一及第二可挠驱动件则由可开孔板及间隔设于该开孔板其中一表面的银胶所构成，该银胶的间隔距离可选择为该开孔板的孔洞间距且位于孔洞与孔洞之间。Preferably, the first diaphragm and the second diaphragm are electret piezoelectric diaphragms. The first vibrating membrane and the second vibrating membrane are vibrating membranes made of one of single-layer and multi-layer dielectric materials, and the dielectric material contains a nano-micro hole film inside, and the dielectric material can be Such as perfluoroethylene propylene copolymer FEP, polytetrafluoroethylene PTFE, polyvinyl dichloride PVDF, some fluorine-containing polymers or other suitable materials. Wherein, the thickness of the single layer of dielectric material may be in the range of 1 to 1000 microns, for example. The electrode can be made of, for example, conductive metal film, silver glue, indium tin oxide or other conductive materials. The thickness of the electrode can range from 0.01 to 3 microns, and the electrode can be made of light-transmitting material. In a preferred embodiment, the electrodes include a first electrode and a second electrode, and the phase difference between the first electrode and the second electrode is 180 degrees. The first and second flexible driving elements can also be flexible driving elements made of light-transmitting materials, the openings of which are distributed in an array, and the diameters of the openings can be different. In a preferred implementation aspect, the first and second flexible driving parts are conductive thin metal plates, and the conductive metal thin plates can be metal meshes, so that the openings are grids of metal meshes, and the support portion is the metal mesh. The convex part of the mesh. In another preferred embodiment, the first and second flexible driving parts are formed by a perforated plate and silver glue spaced on one surface of the perforated plate, and the distance between the silver glue can be selected as The hole spacing of the perforated plate is located between the holes.
此外，在一个优选实施方面中，可选择将该支撑部设于该第一振膜与该第二振膜。In addition, in a preferred implementation aspect, the support portion can be optionally disposed on the first diaphragm and the second diaphragm.
本发明的可挠式扬声器的制法则可包括下列步骤：首先，提供分别具有第一表面及第二表面的第一及第二振膜；接着，在该第一及第二振膜至少其中一者的第一表面形成电极；之后，在该第一及第二振膜的第二表面分别设置间隔固定至该第二表面以提供振膜张应力的多个支撑部、以及设于各该支撑部远离该第二表面的一侧以形成发音单体的开孔部的第一及第二可挠驱动件；最后，结合该第一振膜与该第二振膜的第一表面。The manufacturing method of the flexible loudspeaker of the present invention may include the following steps: first, providing first and second diaphragms respectively having a first surface and a second surface; then, at least one of the first and second diaphragms The electrodes are formed on the first surface of the first and second diaphragms; after that, a plurality of support parts fixed to the second surface at intervals to provide tensile stress of the diaphragm are provided on the second surfaces of the first and second diaphragms, and each of the supports The side away from the second surface is used to form the first and second flexible driving parts of the opening of the sounding unit; finally, the first surface of the first diaphragm and the second diaphragm are combined.
在此制法中，优选将多孔聚四氟乙烯PTFE薄膜(Porous PTFE Film)及驻极体高分子薄膜(Electret Film)其中一者固定于钢环作为该第一振膜与该第二振膜。该第一振膜与该第二振膜的厚度可为1至1000微米的范围中。该电极采用选自包括采用蒸镀、溅镀及旋转涂布的技术所组成群组的其中一者而形成，其中，该电极可为铝层。优选地，运用网印技术形成该支撑部、运用微波等离子表面处理的技术对该第一振膜及该第二振膜的第二表面进行表面粗化处理、并以直流高压电对该第一振膜及该第二振膜的第二表面进行电晕充电(Corona Charging)。而且，当该电极包括第一电极及第二电极时，在该第一电极及该第二电极涂布一层银胶，并面对面压合在一起，以结合该第一振膜与该第二振膜的第一表面。此外，该第一振膜、该第二振膜、该电极、该第一可挠驱动件、以及第二可挠驱动件均为透光材料所制成，但所属技术领域中的技术人员可依实际实施的需要加以变化，而非以此为限。In this manufacturing method, preferably, one of a porous PTFE film (Porous PTFE Film) and an electret polymer film (Electret Film) is fixed on a steel ring as the first diaphragm and the second diaphragm. The thickness of the first vibrating membrane and the second vibrating membrane can be in the range of 1 to 1000 microns. The electrode is formed by one of the techniques selected from the group consisting of evaporation, sputtering and spin coating, wherein the electrode can be an aluminum layer. Preferably, the support portion is formed by using screen printing technology, the surface roughening treatment of the first diaphragm and the second surface of the second diaphragm is performed by using microwave plasma surface treatment technology, and the second surface of the first diaphragm is treated with DC high voltage. Corona charging is performed on the second surface of the first diaphragm and the second diaphragm. Moreover, when the electrode includes a first electrode and a second electrode, a layer of silver glue is coated on the first electrode and the second electrode, and pressed together face to face to combine the first diaphragm and the second electrode. the first surface of the diaphragm. In addition, the first diaphragm, the second diaphragm, the electrodes, the first flexible driver, and the second flexible driver are all made of light-transmitting materials, but those skilled in the art can Changes should be made according to the needs of actual implementation, not limited to this.
相较于传统技术，本发明提出一种可挠式扬声器及其制法，设计可间隔固定支撑振膜的可挠驱动件，并利用应用软性压电材料的特性，配合同相及反向信号同时输入该可挠驱动件，以驱动内部作为振膜的软性压电材料来产生声音，故可解决传统技术固定悬边来绷紧振膜而不具可挠式功能的缺失。Compared with the traditional technology, the present invention proposes a flexible loudspeaker and its manufacturing method. It designs a flexible driver that can fix and support the diaphragm at intervals, and uses the characteristics of soft piezoelectric materials to match the in-phase and reverse signals. At the same time, the flexible driver is input to drive the soft piezoelectric material inside as the diaphragm to generate sound, so it can solve the lack of flexible function of the traditional technology to fix the suspension edge to tighten the diaphragm.
同时，本发明的可挠式扬声器构造极为简单、成本低廉、且可采用现有技术进行制造而无制造过程困扰，实适用于大量生产。此外，由于本发明的产品具可挠性，应用本发明可轻易贴附于物体表面，如此便可扩大应用范围以解决传统技术造成应用领域受限的缺失。而且，由于本发明的结构简单，可避免传统技术成本较高及较消耗能源而不具量产竞争性的缺失，且可符合市场需求。At the same time, the flexible loudspeaker of the present invention is extremely simple in structure, low in cost, and can be manufactured by using the existing technology without troubles in the manufacturing process, so it is suitable for mass production. In addition, because the product of the present invention is flexible, it can be easily attached to the surface of objects by applying the present invention, so that the scope of application can be expanded to solve the lack of limited application fields caused by traditional technologies. Moreover, due to the simple structure of the present invention, it can avoid the disadvantages of high cost and energy consumption and lack of competitiveness in mass production of the traditional technology, and can meet the market demand.
由上可知，通过本发明所设计的可挠结构，可达到微型化产品、简化构造、使成本低廉、有利于量产、且可节约能源的功效，相对已克服先前技术所存在的问题。It can be seen from the above that the flexible structure designed by the present invention can achieve miniaturized products, simplified structure, low cost, favorable mass production, and energy saving effects, and relatively overcomes the problems existing in the prior art.
以下通过特定的具体实例说明本发明的实施方式，本领域的技术人员可由本说明书所揭示的内容轻易地了解本发明的其它优点与功效。本发明也可通过其它不同的具体实例加以施行或应用，本说明书中的各项细节也可基于不同观点与应用，在不背离本发明的精神下进行各种修饰与变更。Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
附图说明Description of drawings
图1是显示本发明的第一实施例的可挠式扬声器的示意图，其中该第一振膜及该第二振膜尚未结合；FIG. 1 is a schematic diagram showing a flexible speaker according to a first embodiment of the present invention, wherein the first diaphragm and the second diaphragm have not yet been combined;
图2是显示本发明的第一实施例的可挠式扬声器的示意图，其中该第一振膜及该第二振膜已结合；2 is a schematic diagram showing a flexible speaker according to the first embodiment of the present invention, wherein the first diaphragm and the second diaphragm are combined;
图3A是显示第一实施例的可挠式扬声器的结构分解示意图；FIG. 3A is an exploded schematic view showing the structure of the flexible speaker of the first embodiment;
图3B是显示第一实施例的可挠式扬声器的立体示意图；3B is a perspective view showing the flexible speaker of the first embodiment;
图3C是显示第一实施例的可挠驱动件的变化例的示意图；3C is a schematic diagram showing a modification of the flexible driving member of the first embodiment;
图4是第一实施例的可挠式扬声器的制法的流程示意图；Fig. 4 is a schematic flow chart of the manufacturing method of the flexible loudspeaker of the first embodiment;
图5是显示第一实施例的可挠式扬声器的局部放大示意图；FIG. 5 is a partially enlarged schematic view showing the flexible speaker of the first embodiment;
图6是显示第一实施例的振膜的电声转换原理的示意图；以及6 is a schematic diagram showing the principle of electroacoustic conversion of the diaphragm of the first embodiment; and
图7是显示应用本发明的第二实施例的可挠式扬声器的制法的流程示意图。FIG. 7 is a schematic flow chart showing the manufacturing method of the flexible speaker according to the second embodiment of the present invention.
主要组件符号说明Explanation of main component symbols
1 可挠式扬声器1 flexible speaker
11 第一振膜11 The first diaphragm
111 第一表面111 first surface
113 第二表面113 second surface
13 第二振膜13 second diaphragm
131 第一表面131 first surface
133 第二表面133 second surface
15 第一电极15 first electrode
16 第二电极16 second electrode
17 第一可挠驱动件17 The first flexible driver
171 支撑部171 support part
173 开孔部173 opening part
19 第二可挠驱动件19 The second flexible driver
191 支撑部191 support part
193 开孔部193 opening
110 薄膜110 film
120 钢环120 steel ring
130 铝层130 aluminum layers
140 开孔软板140 perforated soft board
1401 开孔1401 opening
150 铝层150 aluminum layers
160 银胶160 silver glue
S1、S2、S2’、S3、S4 步骤S1, S2, S2’, S3, S4 steps
具体实施方式Detailed ways
以下的实施例是进一步详细说明本发明的观点，但并非以任何观点限制本发明的范围。应注意的是，在附图中所示者均为简化的示意图，仅以示意方式说明本发明的基本架构。因此，这些附图仅显示与本发明有关的构成，且所显示的结构并非依实际实施时的数目、形状、及尺寸比例绘制，实际实施时的规格尺寸实为一种选择性的设计，在此申明。The following examples are to further describe the present invention in detail, but not to limit the scope of the present invention in any way. It should be noted that what is shown in the drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner. Therefore, these drawings only show the composition related to the present invention, and the shown structure is not drawn according to the number, shape and size ratio of the actual implementation. The specification size during the actual implementation is actually a selective design. this statement.
第一实施例first embodiment
图1至图6是依本发明的可挠式扬声器及其制法的第一实施例所绘制的附图。1 to 6 are drawings drawn according to the first embodiment of the flexible speaker and its manufacturing method of the present invention.
参阅图1，显示本发明的可挠式扬声器的分解示意图，如图所示的可挠式扬声器1包括第一振膜11、第二振膜13、第一电极15、第二电极16、以及第一可挠驱动件17、以及第二可挠驱动件19。Referring to Fig. 1 , it shows an exploded view of the flexible speaker of the present invention, as shown in the figure, the
如图1所示，该第一振膜11及该第二振膜13分别具有第一表面111，131及第二表面113，133。在本实施例中，该第一振膜11及该第二振膜13可选择为例如介电材料经过电化(Electrized)处理后而能长期保有静电荷(Static Charges)的驻极体压电振膜，且该第一振膜11与该第二振膜13可为单层或多层介电材料(Dielectric Materials)所制成的振膜，而该介电材料可为例如全氟乙烯丙烯共聚合物FEP、聚四氟乙烯PTFE、聚二氯乙烯PVDF、部份含氟高分子聚合物(Fluorine Polymer)及其它适当材料，该介电材料内部包含纳微米孔洞，该单层介电材料的厚度则可为1至1000微米(μm)。由于驻极体压电振膜为介电材料经过电化处理后而能长期保有静电荷及压电性的振膜，并可使内部包含纳微米孔洞以增加透光度及压电特性，经电晕充电后在材料内部产生双极性电荷(Dipolar Charges)而产生压电效果。As shown in FIG. 1 , the
如图2所示，该第一电极15及该第二电极16用于结合该第一振膜11与该第二振膜13，并分别设于该第一振膜11的第一表面111及该第二振膜13的第一表面131。在本实施例中，该第一电极15及该第二电极16可为导电层，与第一可挠驱动件17及第二可挠驱动件19形成类似三明治结构，可有效将该第一振膜11与该第二振膜13内的电荷屏蔽在其内而不流失。同时，应注意的是，虽在本实施例中设置两层电极于该第一振膜11及该第二振膜13的第一表面111及131，但在其它实施例中可仅设一层电极于该第一及第二振膜的其中一者的第一表面，而不以本实施例中所述为限。此外，本实施例中的电极可为诸如导电金属薄膜、银胶、及氧化铟锡(ITO)所构成的导电层，但也不以此为限，该电极也可为其它导电或表面覆以非导电材料的导电体所构成。As shown in FIG. 2, the
该第一可挠驱动件17及该第二可挠驱动件19分别设有多个支撑部171，191以及开孔部173，193。该支撑部171，191间隔固定至该第一振膜11及该第二振膜13的第二表面113及133以提供振膜张应力。该开孔部173，193则设于各该支撑部171，191远离该第二表面113及133的一侧以形成发音单体，以使输入信号至该第一可挠驱动件17及该第二可挠驱动件19时驱动该第一振膜11与该第二振膜13朝相同方向变形来产生声音。The first flexible driving
在本实施例中，位于最外层的开孔部173，193主要作为外部声音信号输入端，分别同时输入与原本声音信号同相及反向的信号以驱动内部的第一振膜11及第二振膜13产生推拉效应(Push-Pull Effect)的振动，使得该第一振膜11及该第二振膜13受力与外部信号电压成为线性关系。同时，各该开孔部173，193的孔径可为不同，而不局限于本实施例中的附图所示。该支撑部171，191则局部顶住该第一振膜11及该第二振膜13，以提供该第一振膜11及该第二振膜13适当的张应力，并与该开孔部173，193的每一小孔及所对应的第一振膜11及第二振膜13局部形成微型压电发音单体，可令该第一振膜11及该第二振膜13受外部信号电压刺激后产生向各方向的变形，顺利转换成弯曲变形，来驱动该第一振膜11及该第二振膜13周遭的空气产生声音。In this embodiment, the
应注意的是，在本实施例中的第一可挠驱动件17及第二可挠驱动件19可由例如软性导电开孔板及间隔材所构成，亦即，如图3A所示，该开孔部173，193可为软性导电开孔板上的小孔，该支撑部191(171)则为间隔材(图中仅显示该第二可挠驱动件19的部分)，但并非以此为限，只要可令该第一可挠驱动件17及第二可挠驱动件19为可挠结构且结合该第一振膜11及该第二振膜13后也为可挠结构者(如图3B所示)均适用于发明。It should be noted that the first flexible driving
同时，本发明的可挠式扬声器内部所形成的微型压电发音单体，可依该支撑部171，191及该开孔部173，193的分布位置不同而产生不同大小的微型压电发音单体阵列；例如，越密集的开孔可产生越高的声音频段，借以发出不同声音频段，而不以本实施例中的附图所示为限，所属技术领域中的技术人员可依实际需要或设计加以改变，以借此改变所发出的声音频段。At the same time, the micro piezoelectric sounding unit formed inside the flexible speaker of the present invention can produce micro piezoelectric sounding units of different sizes according to the distribution positions of the
此外，图3B所示的支撑部191(171)为凸点状的间隔材，但在其它实施例中也可为其它等效结构，例如图3C所示，该支撑部191(171)凸条状的间隔材。由于所属技术领域中的技术人员可变化该支撑部171，191为任意形状的凸出结构，故在此不再就其它等效的变化例进行说明。In addition, the supporting part 191 (171) shown in Figure 3B is a bump-shaped spacer, but in other embodiments, it can also be other equivalent structures, such as shown in Figure 3C, the supporting part 191 (171) is a raised strip shaped spacers. Since those skilled in the art can change the supporting
在将该第一振膜11及该第二振膜13结合后，如图2所示，配合同相及反向信号同时输入该第一可挠驱动件17及第二可挠驱动件19，例如同相信号输入该第一可挠驱动件17，反向信号输入该第二可挠驱动件19，便可驱动内部该第一振膜11及该第二振膜13内的软性压电材料来产生声音。同时，由于该第一可挠驱动件17及第二可挠驱动件19可提供该第一振膜11及该第二振膜13适当的张应力，并与对应该第一振膜11及该第二振膜13局部形成微型压电发音单体，可让该第一振膜11及该第二振膜13受外部信号电压刺激后产生向各方向的变形的结构优势，在制成大片的扬声器后，即使裁切成各种形状也能发音，并可贴附于物体表面；借此，便可增加设计人员在外型上的想象空间及使用者携带上的方便性，而达成传统技术所完全不能做到的效果。After the
本实施例的可挠式扬声器的制法则可如图4所示的流程，而包括下列步骤S1至S4：The manufacturing method of the flexible loudspeaker of this embodiment can be as shown in FIG. 4, and includes the following steps S1 to S4:
在步骤S1中，提供具有第一表面及第二表面的第一及第二振膜。在本实施例中，如图5所示，例如可取一厚度3微米的多孔聚四氟乙烯PTFE薄膜110，薄膜110四周用诸如双面胶或快干胶的粘着剂固定于钢环120上，使PTFE薄膜110保有一定张力，作为该第一振膜11及该第二振膜13。本实施例中可应用具最强阴电性的含氟分子薄膜材料作为该第一振膜11与该第二振膜13，于含氟高分子产生具有纳微孔结构薄膜，经过电晕充电产生具有长期带电且透光的压电特性，并可在表面镀上透明导电物，例如氧化铟锡、PEDOT等，以透明的压电材料制造出具有透光性的可挠式扬声器，借此提升扬声器的应用范围。同时，虽在本实施例中以厚度为3微米的多孔PTFE薄膜作为振膜，但振膜的厚度优选在例如1至1000微米的范围中，而不以本实施例中所述为限。In step S1, first and second diaphragms having a first surface and a second surface are provided. In the present embodiment, as shown in Figure 5, for example, a porous polytetrafluoroethylene PTFE film 110 with a thickness of 3 microns can be used, and the film 110 is fixed on the steel ring 120 with an adhesive such as double-sided tape or quick-drying adhesive around the film 110, The PTFE film 110 maintains a certain tension to serve as the
在步骤S2中，在该第一及第二振膜至少其中一者的第一表面形成电极。在本实施例中，例如可采用蒸镀、溅镀或旋转涂布的方式在该第一振膜11及该第二振膜13的第一表面111及131镀上厚度为0.1微米的铝层130作为该第一电极15及该第二电极16，于此的第一电极15及第二电极16为该第一振膜11及该第二振膜13接地用的电极。应注意的是，虽在本实施例中形成厚度为0.1微米的铝层作为电极，但电极的厚度优选在例如0.01至3微米的范围中，而不以本实施例中所述为限。同时，该第一电极15及第二电极16优选透光材料所制成的电极，但也不以此为限。In step S2, electrodes are formed on the first surface of at least one of the first and second diaphragms. In this embodiment, for example, the
在步骤S3中，在该第一及第二振膜的第二表面分别设置间隔固定至该第二表面以提供振膜张应力的多个支撑部、以及设于各该支撑部远离该第二表面的一侧以形成发音单体的开孔部的第一及第二可挠驱动件。In step S3, a plurality of supporting parts fixed to the second surface at intervals to provide tensile stress of the diaphragm are provided on the second surfaces of the first and second diaphragms respectively, and each of the supporting parts is provided on the second surface away from the second diaphragm. One side of the surface is the first and second flexible driving parts forming the opening of the sounding monomer.
在本实施例中，例如可先取一厚度为0.2厘米的塑料开孔软板140，开孔率可选择为30％，其中一面用蒸镀或溅镀的方式镀上厚度为0.1微米的铝层150作为导电层，以令该塑料开孔软板140成为一软性导电开孔板来作为外部信号输入端。之后，在该开孔软板镀有导电层(即，本实施例中的铝层)的表面运用例如网印技术在每个开孔点的间距中间网印厚度为50微米的银胶160作为间隔点，间隔点的大小为孔洞间距的八分之一，亦即，令银胶160作为该支撑部171及191，而该开孔部173及193则可为该开孔软板140上的开孔1401；如此，便可制得该第一可挠驱动件17及该第二可挠驱动件19。在本实施例中，该银胶160的间隔距离可例如为该开孔软板140的孔洞间距且位于孔洞与孔洞之间。In this embodiment, for example, a plastic perforated flexible board 140 with a thickness of 0.2 cm can be taken first, and the porosity can be selected as 30%, and one side thereof is plated with an aluminum layer with a thickness of 0.1 micron by evaporation or sputtering. 150 is used as a conductive layer, so that the plastic perforated flexible board 140 becomes a flexible conductive perforated board as an external signal input terminal. Afterwards, on the surface of the perforated flexible board plated with a conductive layer (that is, the aluminum layer in this embodiment), use, for example, screen printing technology to screen-print silver glue 160 with a thickness of 50 microns in the middle of the distance between each perforated point as a spaced point, the size of the spaced point is one-eighth of the hole pitch, that is, the silver glue 160 is used as the
此外，为增加该银胶160的接着程度，可运用诸如微波等离子表面处理的技术对该第一振膜11及该第二振膜13未镀有电极的表面(即，第二表面113及133)进行表面粗化处理。随后，可将该第一振膜11及该第二振膜13的第二表面113及133与开孔软板140含有银胶160间隔设置的表面(即，该第一可挠驱动件17及第二可挠驱动件19)以银胶160所具有的粘结性加以接着，便可结合该第一振膜11及该第二振膜13与该第一可挠驱动件17及第二可挠驱动件19。In addition, in order to increase the bonding degree of the silver glue 160, a surface treatment such as microwave plasma surface treatment can be used to treat the surfaces of the
应了解的是，由于诸如蒸镀、溅镀、旋转涂布、网印、及微波等离子表面处理等技术的原理与作用都属传统技术，故在此不再多作说明。当然，本发明的制法并不以此为限，而且，所属技术领域中的技术人员也可依实际需要或设计加以改变及修改各层结构的厚度。同时，该第一可挠驱动件17及第二可挠驱动件19也可与振膜与电极一样为透光材料所制成的可挠驱动件，但也不以此为限。It should be understood that since the principles and functions of technologies such as evaporation, sputtering, spin coating, screen printing, and microwave plasma surface treatment are traditional technologies, no further description is given here. Of course, the manufacturing method of the present invention is not limited thereto, and those skilled in the art can also change and modify the thickness of each layer structure according to actual needs or design. At the same time, the first
在步骤S4中，结合该第一振膜与该第二振膜的第一表面。在本实施例中，例如可在该第一电极15及该第二电极16涂布一层银胶(未 图标)，并面对面压合在一起，以结合该第一振膜与该第二振膜的第一表面。如此，可利用该第一电极15及第二电极16将该第一振膜11及该第二振膜13的第一表面111及131接地，该第一振膜11及该第二振膜13的第二表面113及133则以例如20kV的直流高压电作电晕充电，以使该第一振膜11及该第二振膜13内部驻有电荷，并伴随压电特性产生。In step S4, combining the first diaphragm and the first surface of the second diaphragm. In this embodiment, for example, a layer of silver glue (not shown) can be coated on the
按驻极体压电振膜的电声转换原理为：当驻极体电荷为双极性电荷，将具有压电特性，此驻极体的分子结构一般为非结晶聚合物(Amorphous Polymer)，在双面镀上导电物形成两面彼此绝缘的电极，将此结构加热至聚合物的玻璃转换温度(Glass Transition Temperature)后，在两电极间持续充以高压电一段时间，即形成双极性电荷，例如PVDF。在本实施例中，可运用驻极体材料内部的双极性电荷特性及静电力效应，当驻极体振膜受到外部电压刺激后，产生垂直或平行于振膜表面的变形。这样，若振膜四边固定，可将原本垂直或平行于振膜表面的变形转变成弯曲变形，进而驱动振膜周遭的空气来产生声音，如图6所示。根据静电力公式及能量定律，振膜受力为整体扬声器的电容值乘上内部电场大小及外部输入声音电压信号，若振膜受力越大，则输出声音越大。According to the electroacoustic conversion principle of the electret piezoelectric diaphragm: when the electret charge is a bipolar charge, it will have piezoelectric characteristics. The molecular structure of the electret is generally an amorphous polymer (Amorphous Polymer). Electrodes that are insulated from each other are formed by plating on both sides of the conductor. After the structure is heated to the glass transition temperature (Glass Transition Temperature) of the polymer, a high voltage is continuously charged between the two electrodes for a period of time to form bipolarity. charge, such as PVDF. In this embodiment, the bipolar charge characteristics inside the electret material and the electrostatic force effect can be utilized, and when the electret diaphragm is stimulated by an external voltage, deformation perpendicular to or parallel to the surface of the diaphragm occurs. In this way, if the four sides of the diaphragm are fixed, the deformation that was originally perpendicular or parallel to the surface of the diaphragm can be transformed into a bending deformation, and then the air around the diaphragm is driven to generate sound, as shown in Figure 6. According to the electrostatic force formula and energy law, the force on the diaphragm is the capacitance value of the overall speaker multiplied by the size of the internal electric field and the external input sound voltage signal. If the force on the diaphragm is greater, the output sound will be louder.
因此，本实施例可在驻极体压电振膜(即，该第一振膜11及该第二振膜13)内部制作纳微孔结构，以增加内部储存电荷表面积，并明显提高永久储存电荷量及压电特性。而且，当含氟高分子薄膜材料具有纳微孔结构，也可形成透光驻极体材料(例如FEP)，以使本实施例中的可挠式扬声器具透光性，以增加其应用性。由此可知，本发明的振膜内部可包含纳微米结构来增加输出音量及透光性。Therefore, in this embodiment, a nanoporous structure can be made inside the electret piezoelectric diaphragm (that is, the
由本实施例的可挠式扬声器及其制法可知，由于本发明是设计应用软性驻极体压电薄膜，配合可挠驱动件驱动振膜来产生声音，构造极为简单且成本低廉，非常适合大量生产。同时，由于结构具可挠的优点，不仅可使产品微型化，更不需额外消耗能量，而有利于节约能源。此外，本发明的可挠式扬声器可应用于目前全力发展的可挠性电子技术中，以例如应用于显示器而言，除了令显示器有影像显示外也有声音的产生，且可成为未来可携式多媒体载台的主流，极具发展价 值。From the flexible loudspeaker of this embodiment and its manufacturing method, it can be seen that since the present invention is designed to use a soft electret piezoelectric film and cooperate with a flexible driver to drive the diaphragm to generate sound, the structure is extremely simple and the cost is low, and it is very suitable for Mass production. At the same time, because the structure has the advantage of being flexible, not only can the product be miniaturized, but also does not require additional energy consumption, which is beneficial to energy saving. In addition, the flexible speaker of the present invention can be applied to the flexible electronic technology that is currently being fully developed, for example, it can be used in a display. In addition to making the display display images, it also has sound generation, and can become a future portable speaker. The mainstream of multimedia platforms has great development value.
相比于传统技术不具可挠式功能，而且有着体积较大、构造复杂、成本较高、耗费能源且不利于量产等种种缺失，本发明提供可挠式扬声器以应用于具重量轻与耐冲击等特性的产品中，同时简化结构的设计可令成本低廉并可节约能源，且进而可大幅量产。因此，本发明具可挠式功能且可微型化，而构造简单且不需额外增加体积，使得成本低廉、有利于量产、也不需额外消耗能量，并可节约能源，实已解决先前技术所存在的问题。Compared with the traditional technology that does not have flexible functions, and has many shortcomings such as large volume, complex structure, high cost, energy consumption, and is not conducive to mass production, the present invention provides a flexible speaker for applications with light weight and durability. In products with characteristics such as impact, the simplified structure design can reduce the cost and save energy, and thus can be mass-produced. Therefore, the present invention has a flexible function and can be miniaturized, and the structure is simple and does not require additional volume, which makes the cost low, is conducive to mass production, does not require additional energy consumption, and can save energy. It has solved the previous technology the existing problems.
第二实施例second embodiment
图7为依照本发明的可挠式扬声器及其制法的第二实施例所绘制的附图。其中，与前述实施例相同或近似的组件以相同或近似的组件符号表示，并省略详细的叙述，以使本案的说明更清楚易懂。FIG. 7 is a diagram drawn according to the second embodiment of the flexible speaker and its manufacturing method of the present invention. Wherein, components that are the same or similar to those in the foregoing embodiments are represented by the same or similar component symbols, and detailed descriptions are omitted to make the description of this case clearer and easier to understand.
第二实施例与第一实施例最大不同之处在于第一实施例中的第一可挠驱动件及第二可挠驱动件可由例如软性导电开孔板及间隔材所构成，第二实施例中的第一可挠驱动件及第二可挠驱动件则可为例如导电金属薄板。同时，如图7所示，本实施例中的制法步骤在步骤S2’中于该第一及第二振膜的其中一者的第一表面形成电极，而不须如第一实施例形成两个电极。The biggest difference between the second embodiment and the first embodiment is that the first flexible driver and the second flexible driver in the first embodiment can be made of, for example, flexible conductive perforated plates and spacers. In this example, the first flexible driving element and the second flexible driving element can be, for example, conductive thin metal plates. Simultaneously, as shown in FIG. 7 , in the manufacturing method step in this embodiment, electrodes are formed on the first surface of one of the first and second vibrating membranes in step S2', instead of being formed as in the first embodiment. two electrodes.
此外，该第一可挠驱动件及第二可挠驱动件可为例如导电金属薄板，该导电金属薄板具有交错的网格可取代第一实施例的开孔部，而该网格的凸出部分则可取代第一实施例的支撑部作为间隔点。如此一来，便可简省所需的组件数量。In addition, the first flexible driving element and the second flexible driving element can be, for example, conductive thin metal plates, and the conductive metal thin plates have interlaced grids instead of the openings in the first embodiment, and the protruding portions of the grids Part of it can replace the supporting part of the first embodiment as the spacing point. In this way, the number of required components can be reduced.
而且，本实施例中的第一可挠驱动件及第二可挠驱动件本身即可导电，故可简化第一实施例的制法及所需的材料。举例来说，在本实施例中，可取一厚度为4微米的驻极体高分子薄膜固定于钢环上，使薄膜保有一定张力，以作为可挠式扬声器的振膜。接着，采用蒸镀或溅镀的方式在该第一振膜与该第二振膜的其中一面(例如第一表面)镀上厚度为0.05微米的铝层作为振膜接地用的电极。然后，取一厚度为0.2厘米的开孔金属网，该开孔金属网为一作为外部信号输入端的导电金属薄板，且开孔率可为例如50％，并以开孔金属网本身的交错网格的凸出部分作为间隔点，而该振膜与该开孔金属网组合后可在四周 用胶带固定。之后的制法便可与第一实施例中所述的相同，故在此不再多作说明。Moreover, the first flexible driving element and the second flexible driving element in this embodiment can conduct electricity, so the manufacturing method and required materials of the first embodiment can be simplified. For example, in this embodiment, an electret polymer film with a thickness of 4 micrometers can be fixed on the steel ring so that the film maintains a certain tension, and can be used as the diaphragm of the flexible speaker. Next, an aluminum layer with a thickness of 0.05 μm is plated on one side (for example, the first surface) of the first diaphragm and the second diaphragm by evaporation or sputtering as an electrode for diaphragm grounding. Then, get a thickness of 0.2 cm open metal mesh, the open metal mesh is a conductive metal sheet as an external signal input end, and the opening ratio can be, for example, 50%, and the interlaced mesh of the open metal mesh itself The protruding part of the grid is used as the interval point, and the diaphragm can be fixed around with adhesive tape after being combined with the perforated metal mesh. The subsequent manufacturing method can be the same as that described in the first embodiment, so no further description is given here.
综合前述，本发明提出一种可挠式扬声器及其制法，将扬声器外部设计成具有可挠性的结构，并使用软性压电材料作为振膜，故应用本发明可制成如同布料的大片可挠式扬声器，在裁切成不同形状后仍能发音，且可改变驱动件的结构而任意改变声音频段，并可随应用产品的表面形状而挠曲贴附，以符合实际需要。如此，可在微型化的结构下增加功能性，相对已解决先前技术所存在的问题。In summary, the present invention proposes a flexible loudspeaker and its manufacturing method. The exterior of the loudspeaker is designed to have a flexible structure, and a soft piezoelectric material is used as the diaphragm, so the application of the present invention can be made into a fabric-like The large piece of flexible speaker can still produce sound after being cut into different shapes, and the structure of the driver can be changed to change the sound frequency range arbitrarily, and it can be flexed and attached according to the surface shape of the applied product to meet actual needs. In this way, functionality can be increased in a miniaturized structure, which relatively solves the problems existing in the prior art.
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何所属技术领域中的技术人员均可在不违背本发明的精神及范围下，对上述实施例进行修饰与改变。例如，可修改第一及第二实施例为同时制作第一及第二振膜、电极、以及第一及第二可挠驱动件，而非先制作其中具有振膜、电极以及可挠驱动件为一组结构单元，在制作另一组相同结构后再进行压合；或者，可修改第一实施例为将输入信号同时接到对向的电极，例如图1中接于该第一可挠驱动件17的信号也可同时接于该电极16，而接于该第二可挠驱动件19的信号也可同时接于该电极15，亦即，该电极除可作为接地用，也可接上外部信号，且此时须于第一实施例的两电极间增设绝缘层；此外，也可选择将该支撑部设于该第一振膜与该第二振膜。因此，本发明的权利保护范围应如后述的权利要求所列。The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Any person skilled in the art can modify and change the above-mentioned embodiments without departing from the spirit and scope of the present invention. For example, the first and second embodiments can be modified to manufacture the first and second diaphragms, electrodes, and first and second flexible drivers at the same time, instead of first manufacturing the diaphragm, electrodes and flexible drivers. It is a group of structural units, and after making another group of the same structure, it is pressed together; or, the first embodiment can be modified to connect the input signal to the opposite electrode at the same time, such as connecting to the first flexible electrode in Figure 1 The signal of
Claims (27)
Translated fromChinesePriority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510137654XACN1997243B (en) | 2005-12-31 | 2005-12-31 | Pliable loudspeaker and its making method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200510137654XACN1997243B (en) | 2005-12-31 | 2005-12-31 | Pliable loudspeaker and its making method |
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| CN1997243A CN1997243A (en) | 2007-07-11 |
| CN1997243Btrue CN1997243B (en) | 2011-07-27 |
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| US8462965B2 (en) | 2008-12-30 | 2013-06-11 | Beijing Funate Innovation Technology Co., Ltd. | Thermoacoustic module, thermoacoustic device, and method for making the same |
| US8763234B2 (en) | 2008-12-30 | 2014-07-01 | Beijing Funate Innovation Technology Co., Ltd. | Method for making thermoacoustic module |
| US8905320B2 (en) | 2009-06-09 | 2014-12-09 | Tsinghua University | Room heating device capable of simultaneously producing sound waves |
| US8615096B2 (en) | 2009-08-07 | 2013-12-24 | Tsinghua University | Thermoacoustic device |
| US8406450B2 (en) | 2009-08-28 | 2013-03-26 | Tsinghua University | Thermoacoustic device with heat dissipating structure |
| US8537640B2 (en) | 2009-09-11 | 2013-09-17 | Tsinghua University | Active sonar system |
| US8494187B2 (en) | 2009-11-06 | 2013-07-23 | Tsinghua University | Carbon nanotube speaker |
| US8457331B2 (en) | 2009-11-10 | 2013-06-04 | Beijing Funate Innovation Technology Co., Ltd. | Thermoacoustic device |
| US8811631B2 (en) | 2009-11-16 | 2014-08-19 | Beijing Funate Innovation Technology Co., Ltd. | Thermoacoustic device |
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