WO2018000187A1 - 柔性装置 - Google Patents

柔性装置 Download PDF

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Publication number
WO2018000187A1
WO2018000187A1 PCT/CN2016/087426 CN2016087426W WO2018000187A1 WO 2018000187 A1 WO2018000187 A1 WO 2018000187A1 CN 2016087426 W CN2016087426 W CN 2016087426W WO 2018000187 A1 WO2018000187 A1 WO 2018000187A1
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WO
WIPO (PCT)
Prior art keywords
flexible
layer
support layer
substrate
flexible device
Prior art date
Application number
PCT/CN2016/087426
Other languages
English (en)
French (fr)
Inventor
王朝纲
Original Assignee
深圳市柔宇科技有限公司
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.)
Filing date
Publication date
Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201680019623.0A priority Critical patent/CN107636570B/zh
Priority to US16/085,817 priority patent/US20190043390A1/en
Priority to EP16906590.1A priority patent/EP3422328A4/en
Priority to JP2019505100A priority patent/JP6735902B2/ja
Priority to PCT/CN2016/087426 priority patent/WO2018000187A1/zh
Publication of WO2018000187A1 publication Critical patent/WO2018000187A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/0017—Casings, cabinets or drawers for electric apparatus with operator interface units
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0217—Mechanical details of casings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the present invention relates to a flexible device, and more particularly to a flexible keyboard.
  • the keyboard has been widely used as a peripheral device commonly used in computers.
  • Existing keyboards are usually made of a hard plastic material that can only be used in a fixed position and is not convenient to carry.
  • the industry has developed a flexible keyboard that can be curled, which can be deployed during use, can be rolled up when not in use, and is convenient to use.
  • Flexible keyboards typically use a flexible touchpad as a flexible component that the user can touch by touching the corresponding letters or characters on the flexible touchpad.
  • the existing flexible touch panel is prone to warpage when unfolded after a long time of winding, which affects the normal input of the user.
  • the present invention provides a flexible device that is less prone to warpage.
  • a flexible device comprising a receiving member and a flexible member retractable or unfoldable relative to the receiving member, the flexible member comprising a flexible substrate comprising a first surface and a second surface supported to the flexible substrate when the flexible member is deployed
  • the first surface is disposed opposite the second surface
  • the flexible member further includes a support layer fixed to the second surface of the flexible substrate. When the flexible member is deployed, the support layer generates a force toward the receiving member to reduce or eliminate the tilt of the flexible member. song.
  • the support layer When the flexible element is deployed, the support layer creates a force toward the receiving element due to contraction.
  • the heat shrinkage rate of the support layer is greater than the heat shrinkage rate of the flexible substrate.
  • the support layer is fixed to the second surface of the flexible substrate by heat treatment.
  • the support layer is a transparent material.
  • the support layer comprises silica gel.
  • the flexible substrate includes a substrate, a protective layer, and a functional layer between the substrate and the protective layer, the support layer being fixed to the substrate.
  • the base, protective layer and functional layer are all transparent materials.
  • the functional layer includes an electrode layer, and the first surface of the flexible substrate forms a touch surface.
  • the flexible member also includes a cover layer disposed on the first surface of the flexible substrate.
  • the hardness of the cover layer is less than the hardness of the flexible substrate.
  • the hardness of the cover layer is less than the hardness of the protective layer.
  • the thickness of the cover layer is less than the thickness of the support layer.
  • the shrinkage stress generated by the cover layer is less than the shrinkage stress generated by the support layer.
  • the cover layer and the support layer are made of the same material.
  • the cover layer comprises silica gel.
  • the surface of the cover layer forms a projection that simulates the keys of the keyboard.
  • the receiving member includes a reel and a reel disposed in the reel. When the flexible substrate is wound, the first surface is wound on the reel.
  • the support layer Since the support layer generates a force toward the receiving member, which acts on the second surface for supporting the flexible substrate, the warping stress of the flexible member can be offset or reduced, thereby reducing or eliminating the warpage of the flexible member. .
  • FIG. 1 is a schematic view of a flexible device in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic illustration of a flexible member of the flexible device of FIG. 1.
  • FIG. 3 is a schematic illustration of a flexible substrate of the flexible member of FIG. 2.
  • FIG. 4 is a schematic view of a flexible member in accordance with another embodiment of the present invention.
  • Figure 5 is a schematic illustration of a flexible member in accordance with yet another embodiment of the present invention.
  • Figure 6 is a schematic illustration of a flexible member in accordance with yet another embodiment of the present invention.
  • Figure 7 is a schematic view of the force of the flexible member of Figure 2.
  • Figure 8 is a schematic view of the force of the flexible member of Figure 5.
  • a flexible device 10 in accordance with an embodiment of the present invention includes a receiving member 20 and a flexible member 30.
  • the receiving member 20 includes a spool 22 having a spool 24 therein for winding the flexible member 30.
  • the side of the spool 22 is open with an opening through which the flexible member 30 projects or retracts into the spool 22.
  • the spool 22 can be constructed of a rigid material to protect the flexible member 30 received therein.
  • a controller and a power source are also housed in the spool 22.
  • a power source is used to power various electronic components within the spool 22.
  • the controller is configured to receive and process an input signal to the flexible element 30 or to transmit the signal to the flexible element 30.
  • a communication module may also be integrated within the spool 22 for connecting the flexible device 10 to external electronic devices (e.g., cell phones, computers, tablets, display screens, etc.) to establish communication therebetween.
  • the communication module can transmit signals between the controller and the electronic device to cause the electronic device or flexible member 30 to respond to the signal.
  • a speaker can be integrated in the reel 22 for playing sound effects of signals or other sounds.
  • the flexible member 30 includes a flexible substrate 32.
  • the flexible substrate 32 is a flexible touch panel. It can be understood that the flexible substrate 32 can also be a substrate having other functions, such as a flexible display. .
  • a cover layer 34 is provided on the touch surface of the flexible touch panel.
  • the touch surface of the flexible touch panel is a surface for the user to make a touch input.
  • the touch surface is an upper surface of the flexible touch panel.
  • Both the cover layer 34 and the flexible touch pad can be bent to ensure that they can be reeled within the receiving member 20.
  • the cover layer 34 and the flexible touch panel may have a bending radius of less than 5 mm.
  • the hardness of the cover layer 34 is less than the hardness of the flexible touch panel.
  • the cover layer 34 is preferably made of silicone to provide better bending properties while ensuring a hand.
  • cover layer 34 materials such as rubber and TPE (thermoplastic elastomer) can also be used to produce the cover layer 34, and the effect of the silica gel can be basically achieved.
  • the cover layer 34 is a transparent material to enhance the overall appearance and avoid obscuring the flexible touch panel.
  • the flexible touch panel is composed of a substrate 320, an electrode layer 322, and a protective layer 324.
  • the substrate 320, the electrode layer 322, and the protective layer 324 are all made of a transparent material.
  • the hardness of at least one of the substrate 320, the electrode layer 322, and the protective layer 324 is greater than the hardness of the cover layer 34.
  • the hardness of the protective layer 324 is greater than the hardness of the cover layer 34.
  • the substrate 320 is used to support the electrode layer 322 and can serve as a support structure for fabricating the electrode layer 322.
  • the electrode layer 322 is used to sense a user's touch action on the touch surface to generate a touch signal.
  • the electrode layer 322 may be a single layer electrode layer or a two-layer electrode layer separated by an insulating layer, depending on the requirements.
  • the electrode layer 322 can be made of a transparent conductive material such as nano silver wire or ITO.
  • the protective layer 324 protects the electrode layer 322.
  • the protective layer 324 is made of a material such as PET (polyethylene terephthalate plastic) or PVC (polyvinyl chloride), and has a certain hardness to protect the electrode layer 322 below it.
  • the upper surface of the protective layer 324 is the touch surface of the flexible touch panel. Further, letters, symbols, numbers, and the like may be formed on the protective layer 324 to simulate the layout of the keys.
  • the logo may be formed on the touch surface by silk screen, etching, or the like, or formed on the lower surface of the protective layer 324.
  • letters, symbols, numerals, and the like may also be formed on the upper or lower surface of the cover layer 34.
  • a plurality of protrusions 340 may be formed on the upper surface of the cover layer 34 for simulating the protruding keys in the mechanical keyboard, so that the user has a more hand feeling when tapping the cover layer 34.
  • the flexible substrate 32 When the flexible substrate 32 is a flexible display screen, it also consists of a substrate 320, a display layer, and a protective layer 324.
  • the substrate 320 and the protective layer 324 may be made of the same material as the substrate 320 and the protective layer 324 of the flexible touch panel.
  • the display layer is made of an OLED (Organic Light Emitting Diode) or E-ink (Electronic Ink) material.
  • the display layer and the electrode layer 322 may be collectively referred to as a functional layer of the flexible substrate 32.
  • the flexible member 30 can be moved within the receiving member 20 to switch the flexible device 10 between the first state and the second state.
  • the flexible member 30 can be crimped within the receiving member 20 such that the flexible device 10 is in the first state. Since the flexible device 10 is small in this state, it can be easily carried.
  • the flexible member 30 can also be deployed from within the receiving member 20 such that the flexible device 10 is in the second state. In this state, the user can make a touch input on the touch surface of the flexible member 30. It can be understood that the touch input can be an action of tapping or tapping with a finger on the touch surface, or can be touched. Touch the surface to make gestures with your fingers, such as drawing, drawing, drawing various symbols, letters, numbers, graphics, and so on.
  • the first surface 326 of the flexible substrate 32 is a functional surface that is used to provide the functionality desired by the user (when the flexible substrate 32 is a flexible touchpad, the functional surface is for user touch input; when the flexible substrate 32 is flexible display In the case of a screen, the functional surface is for the user to view the image; the second surface 328 of the flexible substrate 32 is a support surface for placement on a support such as a table top for supporting the flexible substrate 32 in the second state.
  • the first surface 326 of the flexible substrate 32 also wraps around the shaft 24 as the flexible member 30 is wound.
  • the upper surface of the flexible touch panel is the first surface 326 and the lower surface is the second surface 328. During the winding process of the flexible touch panel, the first surface 326 contracts due to its own stress and the second surface undergoes stretching 328.
  • the flexible touchpad is curled within the reel 22 most of the time, due to the continuous stress, the flexible touchpad tends to be upturned after deployment. Especially after a long time of curling, when the flexible touch panel is unfolded, its own warping stress causes the end of the reel 22 to be more susceptible to warpage, affecting the user's experience.
  • the present invention provides a flexible member 30 of another configuration.
  • a flexible member 30 of another configuration of the present invention is illustrated.
  • the flexible member 30 further includes a support layer 36.
  • a support layer 36 is formed on the lower surface of the flexible touch panel.
  • the support layer 36 may be formed on the lower surface of the flexible touch panel by thermoforming or injection molding.
  • the hot press molding refers to coating a surface of the flexible touch panel or the support layer 36 with a liquid adhesive, and bonding the flexible touch panel to the support layer 36 at a high temperature, so that the adhesive fixes the flexible touch panel and the support layer 36;
  • Injection molding refers to placing a flexible touch panel into a mold and then injecting a high-temperature liquid support layer material to bond the surface of the flexible touch panel to form a support layer 36. That is, the process of forming the support layer 36 on the flexible touch panel requires heat treatment. After returning to normal temperature after the heat treatment is completed, the support layer 36 may cause shrinkage stress due to thermal expansion and contraction. Therefore, the shrinkage stress generated by the support layer 36 can be utilized to offset or reduce the warping stress of the flexible touch panel.
  • the heat shrinkage rate of the support layer 36 should be greater than the heat shrinkage rate of the flexible touch panel.
  • the term "heat shrinkage ratio" as used in the present invention means the degree of shrinkage of a material per unit length from the high temperature to the low temperature. Since the heat shrinkage rate of the support layer 36 is greater, After returning from high temperature to normal temperature, the shrinkage stress generated by the support layer 36 is greater than the shrinkage stress of the flexible touch panel. Both the support layer 36 and the fixed end of the flexible touch panel are fixed to the receiving member 20 and cannot move, and the end away from the receiving member 20 is in a free state.
  • the free end of the support layer 36 creates an inward (i.e., toward the spool) force F1 for the lower surface of the free end of the flexible touchpad.
  • This inward force can offset or reduce the upward warpage stress F2 of the flexible touchpad, thereby avoiding or reducing the warpage of the flexible touchpad.
  • the end of the flexible touch panel is exemplified, but in fact the support layer 36 has an inward force on the entire lower surface of the flexible touch panel.
  • the support layer 36 is preferably made of a material having a high heat shrinkage rate, such as silica gel, PVDF (polyvinylidene fluoride), PTFE (polytetrafluoroethylene), or the like.
  • silica gel is used as the material of the support layer 36 in this embodiment.
  • the support layer 36 is also a transparent material to avoid affecting the appearance of the flexible member 30.
  • the cover layer 34 of the silicone material is also disposed on the upper surface of the flexible touch panel, the heat shrinkage rate is the same as the heat shrinkage rate of the support layer 36.
  • the cover layer 34 also creates an inward (i.e., toward the reel 20) force F3 to the upper surface of the flexible touchpad.
  • the inward force F3 produced by the cover layer 34 is applied to the upper surface of the flexible touch panel, thus creating a tendency to pull the free end of the flexible touch panel inwardly, which in turn causes the flexible touch panel to be more susceptible to warpage.
  • the support layer 36 needs to produce greater shrinkage stress.
  • the thickness of the support layer 36 is preferably greater than the thickness of the cover layer 34 to simultaneously cancel or reduce the shrinkage stress of the cover layer 34 and the warpage stress of the flexible touch panel. Moreover, since the support layer 36 is thick, the gravity generated by itself can also offset a part of the warpage stress, so that the offset or lightening effect of the support layer 36 is more obvious. By providing the support layer 36, the flexible member 30 can be kept in a flat state after being deployed for a long time after being curled for a long time, thereby improving the user experience.
  • the support layer 36 can also adopt other materials or other structures to achieve the effect of canceling or reducing the warpage.
  • the support layer 36 may be formed of an elastic material, and the elastic material in a stretched state may be attached to the lower surface of the flexible substrate 32, whereby the elastic material will have a resilience due to the tendency of shrinkage, and it is not necessary to use heat treatment at this time. It can also counteract or reduce the effect of warpage.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Human Computer Interaction (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Position Input By Displaying (AREA)
  • Laminated Bodies (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

一种柔性装置，包括收容元件及可相对收容元件收卷或展开的柔性元件，柔性元件包括柔性基材，柔性基材包括第一表面及在柔性元件展开时对柔性基材支撑的第二表面，第一表面与第二表面相对设置，柔性元件还包括固定于柔性基材第二表面的支撑层，在柔性元件展开时，支撑层产生朝向收容元件的作用力而减轻或消除柔性元件的翘曲。柔性装置可有效地防止柔性元件发生翘曲，确保柔性基材的正常使用。

Description

柔性装置 技术领域
本发明涉及柔性装置，尤其涉及一种柔性键盘。
背景技术
键盘作为目前计算机通用的外设，已被广泛地使用。现有的键盘通常是由坚硬的塑料材质制造，只能放在固定的位置使用，而不方便携带。目前，业界已经开发出可卷曲的柔性键盘，其在使用时可以展开，在不使用的时候可以收卷起来，使用较为方便。
柔性键盘通常是采用柔性触摸板作为柔性元件，用户可以在柔性触摸板上触摸相应的字母或字符来进行输入。然而，现有的柔性触摸板在经过长时间收卷后，在展开时容易发生翘曲的现象，影响到用户的正常输入。
发明内容
本发明提供一种不易发生翘曲的柔性装置。
一种柔性装置，包括收容元件及可相对收容元件收卷或展开的柔性元件，柔性元件包括柔性基材，柔性基材包括第一表面及在柔性元件展开时对柔性基材支撑的第二表面，第一表面与第二表面相对设置，柔性元件还包括固定于柔性基材第二表面的支撑层，在柔性元件展开时，支撑层产生朝向收容元件的作用力而减轻或消除柔性元件的翘曲。
在柔性元件展开时，支撑层由于收缩而产生朝向收容元件的作用力。
支撑层的热收缩率大于柔性基材的热收缩率。
支撑层通过热处理的方式固定于柔性基材的第二表面。
支撑层为透明材料。
支撑层包括硅胶。
柔性基材包括基底、保护层及位于基底和保护层之间的功能层，支撑层固定于基底。
基底、保护层及功能层均为透明材质。
功能层包括电极层，柔性基材的第一表面形成触摸表面。
柔性元件还包括设于柔性基材第一表面的覆盖层。
覆盖层的硬度小于柔性基材的硬度。
覆盖层的硬度小于保护层的硬度。
覆盖层的厚度小于支撑层的厚度。
覆盖层产生的收缩应力小于支撑层产生的收缩应力。
覆盖层及支撑层采用相同的材料制造。
覆盖层包括硅胶。
覆盖层的表面形成模拟键盘的按键的凸起。
收容元件包括卷筒及设于卷筒内的卷轴，柔性基材在收卷时，第一表面缠绕于卷轴上。
在柔性元件收卷时，第一表面压缩，第二表面拉伸。
由于支撑层产生了朝向收容元件的作用力，其作用在用于对柔性基材支撑的第二表面，因而可以抵消或减小柔性元件的翘曲应力，从而减轻或消除柔性元件的翘曲现象。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他明显的变形方法。
图1是本发明一实施例的柔性装置的示意图。
图2是图1的柔性装置的柔性元件的示意图。
图3是图2的柔性元件的柔性基材的示意图。
图4是本发明另一实施例的柔性元件的示意图。
图5是本发明又一实施例的柔性元件的示意图。
图6是本发明再一实施例的柔性元件的示意图。
图7是图2的柔性元件的受力示意图。
图8是图5的柔性元件的受力示意图。
具体实施方式
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述。
请参阅图1，示出了本发明一实施例中的柔性装置10，其包括收容元件20及柔性元件30。本实施例中，收容元件20包括卷筒22，其中部设有卷轴24，用于供柔性元件30缠绕。卷筒22的侧面开设有开口，柔性元件30通过开口伸出或缩入卷筒22。卷筒22可以采用硬质的材料制造，以保护收容在其中的柔性元件30。卷筒22内还收容有控制器及电源。电源用于给卷筒22内的各种电子元件供电。控制器用于接收柔性元件30的输入信号并进行处理，或者将信号传输给柔性元件30。卷筒22内还可以集成有通信模块，用于将柔性装置10与外部的电子设备(如手机、电脑、平板、显示屏等)连接，以在二者之间建立通信。通信模块可将信号在控制器和电子设备之间传输，使电子设备或柔性元件30对信号进行响应。进一步地，卷筒22内还可以集成扬声器，用来播放信号的音效或者其他的声音。
请参阅图2，柔性元件30包括柔性基材32，本实施例中，柔性基材32为柔性触摸板，可以理解地，柔性基材32也可以为具备其他功能的基材，比如柔性显示屏。
柔性触摸板的触摸表面上设有覆盖层34。柔性触摸板的触摸表面为供用户进行触摸输入的表面。本实施例中，触摸表面为柔性触摸板的上表面。覆盖层34及柔性触摸板均可以弯曲，从而确保可以收卷在收容元件20内。优选地，覆盖层34及柔性触摸板的弯曲半径可以小于5mm。覆盖层34的硬度小于柔性触摸板的硬度。由此，用户在柔性元件30上触摸时，可以接触到更加柔软的覆盖层34，从而使得手感更加舒适，进而提升输入效率。覆盖层34优选由硅胶制成，以在确保手感的同时具备较佳的弯曲性能。当然，橡胶、TPE(热塑性弹性体)等材料也可用于制造覆盖层34，也基本能达到硅胶的效果。进一步地，覆盖层34为透明的材质，以提升整体的外观效果，且可避免遮挡住柔性触摸板。
请参阅图3，柔性触摸板由基底320、电极层322及保护层324组成。基底320、电极层322及保护层324均采用透明的材料制造。基底320、电极层322及保护层324至少其中之一的硬度大于覆盖层34的硬度。特别地，保护层324的硬度大于覆盖层34的硬度。基底320用于支撑电极层322，且可作为制作电极层322的支撑结构。电极层322用于感测用户在触摸表面的触摸动作，从而产生触摸信号。电极层322可以为单层电极层，也可以为由绝缘层隔开的双层电极层，具体取决于需求。电极层322可以采用纳米银线、ITO等透明导电材料制造。保护层324对电极层322起到保护作用。保护层324由PET(聚对苯二甲酸类塑料)、PVC(聚氯乙烯)等材料制造，其具备一定的硬度，以对其下方的电极层322起到保护作用。本实施例中，保护层324的上表面即为柔性触摸板的触摸表面。进一步的，保护层324上可以形成字母、符号及数字等标识，从而模拟出键位的布局。标识可以通过丝印、蚀刻等方式形成在触摸表面，或者是形成于保护层324的下表面。当然，字母、符号及数字等标识也可以形成在覆盖层34的上表面或下表面。并且，如图4所示，覆盖层34上表面还可形成多个凸起340，用于模拟出机械键盘中凸出的按键，使用户在敲击覆盖层34时更具有手感。
当柔性基材32为柔性显示屏时，其也由基底320、显示层及保护层324组成。基底320及保护层324可采用与柔性触摸板的基底320及保护层324相同的材质。显示层采用OLED(有机发光二极管)或E-ink(电子墨水)材料制造。本发明中，显示层与电极层322可统称为柔性基材32的功能层。
柔性元件30可以在收容元件20内活动从而使柔性装置10在第一状态及第二状态之间切换。具体而言，柔性元件30可以卷曲在收容元件20内，从而使柔性装置10处于第一状态。由于这种状态下柔性装置10的体积较小，因而可方便地进行携带。柔性元件30还可以从收容元件20内展开，从而使柔性装置10处于第二状态。这种状态下用户可以在柔性元件30的触摸表面上进行触摸输入。可以理解地，触摸输入可以是在触摸表面用手指点击或敲击的动作，也可以是在触 摸表面用手指做出手势的动作，比如上划、下划、画出各种符号、字母、数字、图形等。柔性基材32的第一表面326为功能面，其用于提供用户所需的功能(当柔性基材32为柔性触摸板时，功能面为供用户触摸输入；当柔性基材32为柔性显示屏时，功能面为供用户观看图像)；柔性基材32的第二表面328为支撑面，其用于在第二状态时置于桌面等支撑物上以对柔性基材32支撑。此外，柔性基材32的第一表面326在柔性元件30收卷时还缠绕转轴24。本实施例中，柔性触摸板的上表面为第一表面326，下表面为第二表面328。在柔性触摸板的收卷过程中，由于自身的应力作用，第一表面326发生收缩，第二表面发生拉伸328。
在使用过程中，由于大部分时间柔性触摸板都是卷曲在卷筒22内的，受到持续的应力作用，柔性触摸板在展开之后容易发生上翘的现象。特别是在经过长时间的卷曲之后，柔性触摸板在展开时，其自身的翘曲应力导致远离卷筒22的末端更容易发生翘曲，影响到用户的使用体验。为使柔性触摸板在展开时能够自动地恢复平整的状态，本发明提供了另一种结构的柔性元件30。
请参阅图5-6，示出了本发明另一种结构的柔性元件30，除了柔性触摸板和覆盖层34之外，柔性元件30还包括支撑层36。支撑层36形成于柔性触摸板下表面。支撑层36可通过热压成型或注入成型的方式形成在柔性触摸板下表面。其中，热压成型是指在柔性触摸板或支撑层36表面涂覆液态的粘胶，在高温下将柔性触摸板与支撑层36贴合，使粘胶将柔性触摸板与支撑层36固定；注入成型是指将柔性触摸板放入模具内，然后注入高温的液态支撑层材料，使其结合在柔性触摸板表面而形成支撑层36。也就是说，支撑层36形成于柔性触摸板上的过程都需要经过热处理。在热处理完毕恢复至常温后，支撑层36会由于热胀冷缩而产生收缩应力。因此，可以利用支撑层36所产生的收缩应力来抵消或减小柔性触摸板的翘曲应力。
请参阅图7，特别地，支撑层36的热收缩率应大于柔性触摸板的热收缩率。本发明所称“热收缩率”是指从高温到低温的过程中，单位长度的材料的收缩程度。由于支撑层36的热收缩率更大，因此 在从高温恢复到常温后，支撑层36所产生的收缩应力要大于柔性触摸板的收缩应力。支撑层36及柔性触摸板的固定末端都是固定在收容元件20上而无法移动，远离收容元件20的末端是处于自由状态。支撑层36的自由末端对于柔性触摸板自由末端的下表面产生向内(即朝向卷筒方向)的作用力F1。这部分向内的作用力可以抵消或减小柔性触摸板向上的翘曲应力F2，从而避免或减轻柔性触摸板的翘曲现象。本实施例中是以柔性触摸板的末端举例说明，但实际上支撑层36对柔性触摸板的整个下表面都具有向内的作用力。
支撑层36优选采用热收缩率较高的材料制造，如硅胶、PVDF(聚偏氟乙烯)、PTFE(聚四氟乙烯)等。优选地，本实施例中采用硅胶作为支撑层36的材料。支撑层36也为透明材质，以避免影响柔性元件30的外观。
请参阅图8，由于在柔性触摸板的上表面也设置了硅胶材料的覆盖层34，其热收缩率与支撑层36的热收缩率相同。因此，与支撑层36的原理相似，覆盖层34也会对柔性触摸板的上表面产生向内(即朝向卷筒20方向)的作用力F3。覆盖层34所产生的向内作用力F3由于是施加在柔性触摸板的上表面，因此会产生将柔性触摸板的自由末端向内拉的趋势，反而会导致柔性触摸板更容易发生翘曲。为进一步抵消覆盖层34所产生的收缩应力，支撑层36需要产生更大的收缩应力。因此，支撑层36的厚度优选于大于覆盖层34的厚度，以同时抵消或减小覆盖层34的收缩应力及柔性触摸板的翘曲应力。并且，由于支撑层36较厚，其本身所产生的重力也能抵消一部分翘曲应力，从而使得支撑层36的抵消或减轻效果更加明显。通过设置支撑层36，可以使柔性元件30在经过长时间的卷曲之后展开使用时仍然保持平整的状态，从而提升用户的使用体验。
可以理解地，支撑层36也可以采用其他的材料或其他的结构来实现抵消或减轻翘曲的效果。比如可以采用弹性材料形成支撑层36，将处于拉伸状态的弹性材料贴设在柔性基材32的下表面，由此弹性材料将由于具有收缩的趋势而产生回弹力，此时不必借助于热处理也同样可以起到抵消或减轻翘曲的效果。

Claims (19)

  1. 一种柔性装置，包括收容元件及可相对收容元件收卷或展开的柔性元件，柔性元件包括柔性基材，柔性基材包括第一表面及在柔性元件展开时对柔性基材支撑的第二表面，第一表面与第二表面相对设置，其特征在于：柔性元件还包括固定于柔性基材第二表面的支撑层，在柔性元件展开时，支撑层产生朝向收容元件的作用力而减轻或消除柔性元件的翘曲。
  2. 如权利要求1所述的柔性装置，其特征在于：在柔性元件展开时，支撑层由于收缩而产生朝向收容元件的作用力。
  3. 如权利要求2所述的柔性装置，其特征在于：支撑层的热收缩率大于柔性基材的热收缩率。
  4. 如权利要求3所述的柔性装置，其特征在于：支撑层通过热处理的方式固定于柔性基材的第二表面。
  5. 如权利要求1所述的柔性装置，其特征在于：支撑层为透明材料。
  6. 如权利要求1所述的柔性装置，其特征在于：支撑层包括硅胶。
  7. 如权利要求1至6任一项所述的柔性装置，其特征在于：柔性基材包括基底、保护层及位于基底和保护层之间的功能层，支撑层固定于基底。
  8. 如权利要求7所述的柔性装置，其特征在于：基底、保护层及功能层均为透明材质。
  9. 如权利要求8所述的柔性装置，其特征在于：功能层包括电极层，柔性基材的第一表面形成触摸表面。
  10. 如权利要求7所述的柔性装置，其特征在于：柔性元件还包括设于柔性基材第一表面的覆盖层。
  11. 如权利要求10所述的柔性装置，其特征在于：覆盖层的硬度小于柔性基材的硬度。
  12. 如权利要求10所述的柔性装置，其特征在于：覆盖层的硬度小于保护层的硬度。
  13. 如权利要求10所述的柔性装置，其特征在于：覆盖层的厚度 小于支撑层的厚度。
  14. 如权利要求10所述的柔性装置，其特征在于：覆盖层产生的收缩应力小于支撑层产生的收缩应力。
  15. 如权利要求10所述的柔性装置，其特征在于：覆盖层及支撑层采用相同的材料制造。
  16. 如权利要求10所述的柔性装置，其特征在于：覆盖层包括硅胶。
  17. 如权利要求10所述的柔性装置，其特征在于：覆盖层的表面形成模拟键盘的按键的凸起。
  18. 如权利要求1至6任一项所述的柔性装置，其特征在于：收容元件包括卷筒及设于卷筒内的卷轴，柔性基材在收卷时，第一表面缠绕于卷轴上。
  19. 如权利要求1至6任一项所述的柔性装置，其特征在于：在柔性元件收卷时，第一表面压缩，第二表面拉伸。
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