WO2020133277A1 - 弯折检测装置与柔性显示装置 - Google Patents

弯折检测装置与柔性显示装置 Download PDF

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Publication number
WO2020133277A1
WO2020133277A1 PCT/CN2018/125067 CN2018125067W WO2020133277A1 WO 2020133277 A1 WO2020133277 A1 WO 2020133277A1 CN 2018125067 W CN2018125067 W CN 2018125067W WO 2020133277 A1 WO2020133277 A1 WO 2020133277A1
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Prior art keywords
conductive component
flexible display
bending
detection device
pivot
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PCT/CN2018/125067
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English (en)
French (fr)
Inventor
胡小冬
陶波波
刘占超
鄢玖君
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Shenzhen Royole Technologies Co Ltd
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Shenzhen Royole Technologies Co Ltd
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Priority to CN201880095890.5A priority Critical patent/CN112912831A/zh
Priority to PCT/CN2018/125067 priority patent/WO2020133277A1/zh
Publication of WO2020133277A1 publication Critical patent/WO2020133277A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the invention relates to the technical field of flexible display, in particular to the technical field for bending detection of a flexible display screen.
  • the sensing method for bending the flexible display screen is generally implemented by adding additional sensing components outside the electronic device, for example, using an external mechanical or optical sensor outside the electronic device.
  • the button can be mechanically touched to detect the screen bending, or the feedback stroke can be used to realize the folding induction function; the optical sensor can also be used to detect the screen bending function.
  • the above-mentioned implementation method of setting the sensing element outside the display screen to detect the screen bending results in a small integration of the display screen, increases the volume of the whole machine, and can only recognize whether the completeness of the screen reaches the threshold state, and cannot be accurate , Real-time detection of screen bending.
  • embodiments of the present invention provide a compact bending detection device to accurately identify the bending state of a flexible display screen, thereby improving the integration and user experience of the flexible display device.
  • a flexible display device including the aforementioned bending detection device is provided.
  • the embodiment of the invention discloses a bending detection device, which is used for detecting the bending state of a flexible display screen body.
  • the bending detection device includes a bending detection module and a bending recognition circuit.
  • the bending detection module includes an elastic sensing element, a first conductive component and a second conductive component, wherein the first conductive component is disposed opposite to the second conductive component and constitutes a sensing capacitor, and the elastic sensing element is in the flexible
  • the first conductive component is driven to move relative to the second conductive component, and the capacitance value of the sensing capacitor is generated with the first conductive component relative to the second conductive component Changes in relative movement.
  • the bending recognition circuit is electrically connected to the sensing capacitor, and is used for detecting the change amount of the capacitance value of the sensing capacitor and identifying the bending state of the flexible display body according to the change amount of the capacitance value.
  • An embodiment of the present invention discloses a flexible display device, which includes a flexible display screen body and the aforementioned bend detection device, the elastic sensor is disposed along a direction in which the flexible display screen body bends, and the first conductive The component and the second conductive component are disposed at the edge of the flexible display screen.
  • the bending detection device has a compact structure, and can accurately identify the bending state of the flexible display main body, thereby facilitating the flexible display device to execute subsequent other instructions according to the bending state.
  • 1 is a schematic diagram of the side structure of a flexible display device
  • FIG. 2 is a partially disassembled schematic view of the side structure of the bending detection device shown in FIG. 1;
  • FIG. 3 is an enlarged schematic structural view of a part of the bending detection device shown in FIG. 2;
  • FIG. 4 is a schematic perspective view of the structure of the bending detection device shown in FIG. 1;
  • FIG. 5 is an exploded schematic view of the bending detection device shown in FIG. 1;
  • FIG. 6 is a schematic perspective view of the first conductive component of FIG. 2;
  • FIG. 7 is a schematic diagram of a side structure when the flexible display device shown in FIG. 1 is bent;
  • FIG. 8 is a schematic diagram of the side structure of the bending detection device shown in FIG. 1 when no bending occurs and when bending occurs;
  • FIG. 9 is a block diagram of the circuit structure of the bending recognition circuit
  • FIG. 10 is a graph of the coordinate relationship between the voltage signal and the frequency signal.
  • FIG. 1 is a schematic diagram of the side structure of the flexible display device FD.
  • the flexible display device FD includes a flexible display body FB and a bending detection device CD.
  • the bending detection device CD is disposed at the edge position of the side of the flexible display main body FB, and is used to sense the bending state of the flexible display main body FB, and the bending state includes whether the flexible display main body FB is bent and Bending degree.
  • the flexible display main body FB is used to perform image display and can be bent along the first direction F1.
  • the bending detection device CD includes a bending detection module 10 and a bending recognition circuit 12.
  • the flexible display main body FB may be an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display.
  • the bending detection module 10 is used to perform the detection of the bending of the main body FB of the flexible display screen, and converts the detection result into a detection signal in the form of an electrical signal to the bending recognition circuit 12.
  • the bending recognition circuit 12 passes the detection signal The recognition process accurately determines whether the flexible display main body FB is bent and the degree of bending.
  • FIG. 2 is a partial disassembly schematic diagram of the side structure of the bending detection device shown in FIG. 1.
  • the bending detection module 10 includes an elastic sensing element 100, a first conductive component 104 and a second conductive component 105.
  • the first conductive component 104 is disposed opposite to the second conductive component 105 and constitutes a sensing capacitor Cx.
  • the first conductive component 104 and the second conductive component 105 are both made of metal conductive materials, and are both semi-circular flat plate structures with a gap at the center of the circle, and the first conductive component 104 and the second conductive component 105 are arranged in parallel .
  • the elastic sensing element 100 is used to sense the bending state of the flexible display body FB, that is, the elastic sensing component 100 is synchronized with the flat state and the bending state of the flexible display body FB.
  • the elastic sensing element 100 is extended in the flexible display body FB along the bending direction of the flexible display body FB, that is, the first direction F1, so that when the flexible display body FB is in a straight state, The sexy sensing element 100 is in a straight state; when the flexible display body FB is in a curved state, the elastic sensing element 100 is also in a curved state simultaneously, and the bending degree of the elastic sensing element 110 is the same as that of the flexible display screen FB.
  • the elastic sensing element 100 is a flexible link or a spring, and at the same time, the elastic sensing element 100 can be all fixed on the flexible display body FB along the first direction F1 and one end is movably connected to the first conductive component 104 Or, one end of the elastic sensing element 100 is fixed on the flexible display body FB, and the other end is movably connected to the first conductive component 104.
  • the end of the elastic sensing element 100 connected to the conductive component 104 has a through hole (not marked).
  • the flexible display main body FB is provided with a concave accommodating track (not shown) corresponding to the position of the elastic sensing element 100, that is, the elastic sensing element 100 is disposed in the accommodating track, so that It is ensured that the bending direction of the elastic sensing element 100 when the flexible display main body FB is bent is consistent with the bending direction of the flexible display main body FB.
  • the elastic sensing element 100 follows the bending of the flexible display main body FB and drives the first conductive component 104 to move relative to the second conductive component 105 to change the sensing capacitance Cx Of the capacitor.
  • the elastic sensing element 100 is connected to the first conductive component 104, and when the flexible sensing element 100 bends with the flexible display body FB, the first conductive component 104 is driven to rotate around the first pivot 103.
  • the position of the second conductive component 105 is fixed relative to the first pivot 103, that is, the positions of the second conductive component 105 and the first pivot 103 are fixed.
  • the first conductive component 104 rotates around the first pivot 103, the first conductive component 104 moves relative to the second conductive component 105, thereby changing the area facing the two and also causing the capacitance value of the sensing capacitor Cx Corresponding changes also occur in real time.
  • FIG. 3 is an enlarged schematic structural view of a part of the bending detection device shown in FIG. 2
  • FIG. 4 is a perspective structural schematic view of the bending detection device shown in FIG. 1
  • FIG. 5 is shown in FIG. A schematic diagram showing the exploded structure of the bending detection device.
  • the bending detection module 10 further includes a second pivot 101 and a first cantilever 102, and the elastic sensing element 100 is fixed to the second pivot 101 through the through hole along the first direction F1. That is, the second pivot 101 passes through the through hole of the elastic sensing element 100 to achieve the fixed connection between the elastic sensing element 100 and the second pivot 101.
  • the first cantilever 102 includes an opposite first end 102a and a second end 102b, wherein the first end 102a has a first connection portion 1021, the second end 102b has a second connection portion 1022, and the first connection portion 1021 is connected to the second
  • the parts 1022 are all hollow cylindrical structures.
  • the first connecting portion 1021 is pivotally connected to the second pivot 101, that is, the first connecting portion 1021 is sleeved on the second pivot 101 by a hollow cylindrical structure, or the second pivot 101 penetrates the first connecting portion 1021 Hollow cylindrical structure.
  • the first cantilever 102 can rotate around the second pivot 101 through the first connecting portion 1021 under the driving of external force.
  • the second connection portion 1022 of the first cantilever 102 is fixedly connected to the first conductive component 104, that is, the second connection portion 1022 of the first cantilever 102 is fixedly connected to the first conductive component 104, and relative rotation does not occur.
  • the second direction F2 is different from the first direction F1.
  • the second pivot 101 and the first cantilever 102 are displaced along the deformation direction, and at the same time, the first cantilever 102 is driven relative to the second pivot by the second pivot 101 101 rotates, and when the first cantilever 102 rotates, it drives the first conductive component 104 to rotate around the first pivot 103.
  • the bending detection module 10 includes two first cantilevers 102 spaced apart by a predetermined distance.
  • the first conductive component 104 is sandwiched between the two first cantilevers 102; the elastic detection element 100 is sandwiched between the two first cantilevers 102, and at the same time, the second pivot 101 passes through the first of the two first cantilevers 102
  • the connection portion 1021 and the elasticity detection element 100 is provided.
  • the second pivot 101 is integrated with the first cantilever 102 and the first conductive component 104 into an integrated structure.
  • the folding detection module 10 may include only one first cantilever 102.
  • FIG. 6 is a three-dimensional structural diagram of the first conductive component shown in FIG. 2.
  • the first conductive component 104 further includes a limiting portion 104a.
  • the first conductive component 104 is connected to the second connecting portion 1022 of the first cantilever 102 through the limiting portion 104a, and is used to define the first conductive group 104 relative to The position of the first cantilever 102.
  • the limiting portion 104a includes a circular hollow through portion 104b and a limiting rib 104c, wherein the first pivot 103 passes through the hollow portion in the through portion 104b, so that the first conductive component 104 can surround the first The pivot 103 rotates.
  • the limiting rib 104c is elongated and protrudingly arranged on the outer surface of the penetrating portion 104, and the limiting rib 104c is locked in the second connecting portion 1022 of the first cantilever 102, thereby defining the first conductive component 104 and the first cantilever
  • the relative position of 102 is fixed to prevent the first conductive component 104 from moving relative to the first cantilever 102.
  • the hollow portion of the second connecting portion 1022 has a corresponding groove structure, and when the second connecting portion 1022 is connected to the first conductive component 104, the limiting rib 104c is correspondingly locked to the second connecting portion
  • the position of the groove in 1022 makes the position of the second connection portion 1022 and the first conductive component 104 relatively fixed without relative displacement.
  • FIG. 7 is a schematic side view of the flexible display device shown in FIG. 1 when it is bent
  • FIG. 8 is a side view of the bending detection device shown in FIG. 1 when it is not bent and when it is bent.
  • the schematic diagram illustrates the corresponding relationship between the bending state of the flexible display main body FB and the change in the capacitance value of the sensing capacitor Cx with reference to FIGS. 1 and 7-8.
  • the first conductive component 104 and the second conductive component 105 are arranged directly around the first pivot 103, and the first conductive component 104 and the second conductive member 105 have an area A1 (hatched by hatching).
  • the sensing capacitance Cx formed by the first conductive element 104 and the second conductive element 105 has a first capacitance value C0.
  • the first conductive component 104 rotates relative to the second conductive component 105 about the first pivot 103 to produce relative motion.
  • the facing area S1 of the second conductive element 105 is changed to A1- ⁇ A, according to the formula of the capacitance, and the sensing capacitance Cx correspondingly has the second capacitance value C0- ⁇ C.
  • the bending state of the flexible display body FB is characterized by the capacitance value through the bending detection module 10 in the bending detection device CD, that is, the bending detection module 10 can The bending state is converted into the capacitance value corresponding to the sensing capacitor Cx. Then, by identifying the change in the capacitance value of the sensing capacitor Cx, it can be identified whether the flexible display main body FB is bent and the degree of the bending.
  • the corresponding elastic detection element 100 drives the first conductive component 104 to move such that the sensing capacitance Cx
  • the facing area A of the two middle plates changes from small to large, that is, the facing area changes from A1 to A1+ ⁇ A, and the capacitance value of the sensing capacitor Cx changes from C0 to C0-+ ⁇ C.
  • FIG. 9 is a block diagram of a circuit structure of a bending recognition circuit.
  • the bending recognition circuit 12 is electrically connected to the sensing capacitor Cx for detecting the amount of change in the capacitance value of the sensing capacitor Cx and identifying the bending of the flexible display body FB Fold state.
  • the bend recognition circuit 12 uses the form of a frequency-modulated measurement circuit to recognize the amount of change formed when the capacitance value of the sensing capacitor Cx changes, that is, the bend recognition circuit 12 will change the capacitance value of the sensing capacitor Cx And the amount of change is converted into a change in the frequency of the oscillator, and then the frequency change of the oscillator is converted into a change in the corresponding voltage. At the same time, the change in the voltage value and the amount of change can know whether the flexible display main body FB is bent or not. Degree.
  • the bending recognition circuit includes an oscillation inductance L, an oscillator 121, a limiting amplifier 122, and a frequency discriminator 123.
  • the oscillation capacitor L is electrically connected to the two poles of the sensing capacitor Cx, that is, the first conductive element 104 and the second conductive element 105 that are electrically connected to the two poles of the sensing capacitor Cx.
  • the sensing capacitor Cx and the oscillation inductance L are connected in parallel with each other.
  • the oscillator 121 is electrically connected to the oscillating inductance L.
  • the sensing capacitor Cx and the oscillating inductance L are used as the oscillator 121 as part of the resonant circuit of the oscillator 121.
  • the capacitance value of the sensing capacitor Cx changes, the frequency of the oscillator occurs Variety.
  • C1 is the inherent capacitance value of the oscillator
  • C2 is the distributed capacitance value of the oscillator
  • Cx is the capacitance value of the sensing capacitor Cx.
  • ⁇ C represents the amount of change in capacitance.
  • the oscillator 121 outputs a frequency signal corresponding to the sensing capacitor Cx.
  • the limiting amplifier 122 is electrically connected to the oscillator 121 and is used to amplify the frequency signal contained in the oscillator 121.
  • the frequency discriminator 123 is electrically connected to the limiting amplifier 122 and used for converting the frequency signal into a voltage signal. Among them, please refer to FIG. 10 for the corresponding relationship between the voltage signal output by the frequency discriminator 123 and the frequency signal.
  • FIG. 10 is a graph showing the relationship between the frequency (abscissa, f) change of the oscillator 121 and the voltage (ordinate, u) coordinate, as shown in FIG. 10 As shown, when the sensing capacitance Cx changes by the change amount ⁇ C, the frequency of the oscillator 121 will correspondingly change by ⁇ f, so that the voltage will also change correspondingly by ⁇ U.
  • the bending state of the flexible display main body FB can be known by the change of ⁇ U in the acquired voltage signal, that is, whether the flexible display main body FB is bent and the degree of bending can be accurately known.
  • the first conductive component 104 and the second conductive component 105 constituting the sensing capacitor Cx may also have other shapes according to actual needs, such as a circular ring, cylindrical, rectangular, etc., and Not limited to this.
  • the bending detection device CD has a compact structure, and can accurately recognize the bending state of the flexible display main body FB, thereby facilitating the flexible display device FD to execute subsequent other instructions according to the bending state, such as executing extinction Screen, image segmentation, etc.

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Abstract

一种弯折检测装置(FD)包括弯折检测模组(10)与弯折识别电路(12)，以用于检测柔性显示屏主体(FB)的弯折状态。弯折检测模组(10)包括弹性感测元件(100)、第一导电组件(104)以及第二导电组件(105)。第一导电组件(104)与第二导电组件(105)相对设置并且构成感测电容(Cx)，弹性感测元(100)用于感测柔性显示屏主体(FB)的弯折状态，并且驱动第一导电组件(104)相对于第二导电组(105)件产生相对运动，以改变感测电容(Cx)的电容值。弯折识别电路(12)电性连接感测电容(Cx)，用于检测感测电容(Cx)的电容值的改变量并且依据电容值的改变量识别柔性显示屏主体(FB)的弯折状态。

Description

弯折检测装置与柔性显示装置 技术领域
本发明涉及一种柔性显示技术领域，尤其涉及一种针对柔性显示屏弯折检测的技术领域。
背景技术
目前，实现对柔性显示屏幕弯曲的感应方式一般是通过在电子设备外部添加额外的感应部件来实现的，例如采用在电子设备外部外置机械或光学传感器。举例来说，当显示屏幕弯曲到一定程度，通过机械方式触动按键实现对屏幕弯曲的检测，或者通过反馈行程实现折叠感应的功能；还可以通过光学传感器实现感应屏幕弯曲的功能。但是，上述通过在显示屏幕外部来设置传感元件检测屏幕弯曲的实现方式导致显示屏幕的集成度小、增加了整机的体积，并且仅能识别屏幕的完全程度是否达到阈值状态，而无法准确、实时检测屏幕的弯曲程度。
发明内容
为解决前述问题，本发明实施例提供了一种结构紧凑的弯折检测装置，以准确识别柔性显示屏的弯折状态，从而提高了柔性显示装置的集成度与使用体验性。
进一步，还提供一种包括前述弯折检测装置的柔性显示装置。
本发明实施例公开了一种弯折检测装置，以用于检测柔性显示屏主体的弯折状态。弯折检测装置包括弯折检测模组与弯折识别电路。弯折检测模组包括弹性感测元件、第一导电组件以及第二导电组件，其中，所述第一导电组件与第二导电组件相对设置并且构成感测电容，弹性感测元在所述柔性显示屏主体发生弯折时驱动所述第一导电组件相对于所述第二导电组件产生相对运动，所述感测电容的电容值随所述第一导电组件相对于所述第二导电组件产生的相对运动而改变。弯折识别电路电性连接所述感测电容，用于检测所述感测电容的电容值的改变量并且依据所述电容值的改变量识别所述柔性显示屏主体的 弯折状态。
本发明实施例公开了一种柔性显示装置，包括柔性显示屏主体与前述弯折检测装置，所述弹性感测件的沿所述柔性显示屏主体发生弯折的方向设置，所述第一导电组件与第二导电组件设置于柔性显示屏的边缘。
相较于现有技术，弯折检测装置的结构紧凑，并且能够准确识别到柔性显示屏主体的弯折状态，从而便于柔性显示装置依据弯折状态执行后续的其他指令。
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性的前提下，还可以根据这些附图获得其他的附图。
图1为柔性显示装置的侧面结构示意图；
图2为图1所示弯折检测装置的侧面结构的部分拆解示意图；
图3为图2所示部分弯折检测装置的放大结构示意图；
图4为图1所示弯折检测装置的立体结构示意图；
图5为图1所示弯折检测装置的分解结构示意图；
图6为图2所述第一导电组件的立体结构示意图；
图7为图1所示柔性显示装置发生弯折时的侧面结构示意图；
图8为图1所示弯折检测装置未发生弯折时与发生弯折时侧面结构示意图；
图9为弯折识别电路的电路结构框图；
图10为电压信号与频率信号的坐标关系图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
下面结合附图，具体说明弯折检测装置的具体结构及其工作原理。
请参阅图1，其为柔性显示装置FD的侧面结构示意图，如图1所示，柔性显示装置FD包括柔性显示屏主体FB与弯折检测装置CD。
其中，弯折检测装置CD设置于柔性显示屏主体FB侧边的边缘位置，用于感测柔性显示屏主体FB的弯折状态，所述弯折状态包括柔性显示屏主体FB是否发生弯折以及弯折程度。
柔性显示屏主体FB用于执行图像显示，并且能够实现沿着第一方向F1进行弯折。弯折检测装置CD包括弯折检测模组10与弯折识别电路12。本实施例中，柔性显示屏主体FB可以为有机发光二极管(Organic Light-Emitting Diode，OLED)显示屏。
弯折检测模组10用于执行针对柔性显示屏主体FB弯折的检测，并且将检测结果转换为电信号形式的检测信号提供至弯折识别电路12，弯折识别电路12通过针对检测信号的识别处理而准确判断柔性显示屏主体FB是否发生弯折以及发生弯折的程度。
具体地，请参阅图2，图2为图1所示弯折检测装置的侧面结构的部分拆解示意图。弯折检测模组10包括弹性感测元件100、第一导电组件104以及第二导电组件105。
其中，所述第一导电组件104与第二导电组件105相对设置并且构成感测电容Cx。本实施例中，第一导电组件104与第二导电组件105均由金属导电材质构成，均为在圆心处具有缺口的半圆的平板结构，且第一导电组件104与第二导电组件105平行设置。
弹性感测元件100用于感测柔性显示屏主体FB的弯折状态，也即是弹性感测组件100与柔性显示屏主体FB的平直状态以及弯折状态同步。本实施例中，弹性感测元件100沿着柔性显示屏主体FB的弯折方向即第一方向F1延伸设置于柔性显示屏主体FB内，从而当柔性显示屏主体FB处于平直状态时，弹性感测元件100处于平直状态；当柔性显示屏主体FB处于弯曲状态时，弹性感测元件100也同步处于弯曲状态，且弹性感测元件110的弯曲程度与柔性显示屏FB 的弯曲程度相同。
较佳地，弹性感测元件100为柔性连杆或者弹簧，同时，弹性感测元件100可以沿着第一方向F1全部固定于柔性显示屏主体FB上，并且一端活动连接于第一导电组件104；或者，弹性感测元件100其中一端固定于柔性显示屏主体FB上，另外一端活动连接于第一导电组件104。较佳地，弹性感测元件100与导电组件104相连的一端具有通孔(未标识)。
较佳地，柔性显示屏主体FB对应弹性感测元件100的位置设置有内凹的容置轨道(未示出)，也即是弹性感测元件100设置于所述容置轨道内，从而能够确保弹性感测元件100的随着柔性显示屏主体FB弯折时弹性感测元件100的弯折方向与柔性显示屏主体FB的弯折方向一致。
当柔性显示屏主体FB弯折时，弹性感测元件100随柔性显示屏主体FB的弯折并且驱动第一导电组件104相对于第二导电组件105产生相对运动，以改变所述感测电容Cx的电容值。
具体地，弹性感测元件100连接于第一导电组件104，当弹性感测元件100随所述柔性显示屏主体FB发生弯折时，驱动第一导电组件104围绕第一枢轴103转动。第二导电组件105的位置相对于第一枢轴103固定，也即是第二导电组件105和第一枢轴103的位置是固定的。当第一导电组件104围绕第一枢轴103转动时，第一导电组件104相对于第二导电组件105产生相对移动，从而改变了二者正对面积的同时也导致感测电容Cx的电容值也实时发生相应的改变。
请一并参阅图3-5，其中，图3为图2所示部分弯折检测装置的放大结构示意图，图4为图1所示弯折检测装置的立体结构示意图，图5为图1所示弯折检测装置的分解结构示意图。
如图3-5所示，弯折检测模组10还包括第二枢轴101与第一悬臂102，弹性感测元件100沿着第一方向F1通过通孔固定于第二枢轴101。也即是，第二枢轴101贯穿弹性感测元件100的通孔而实现弹性感测元件100与第二枢轴101的固定相接。
第一悬臂102包括相对的第一端102a与第二端102b，其中，第一端102a具有第一连接部1021，第二端102b具有第二连接部1022，第一连接部1021与第二 连接部1022均为中空的圆柱形结构。第一连接部1021枢接于第二枢轴101，也即是第一连接部1021通过中空的圆柱形结构套设于第二枢轴101，或者说第二枢轴101贯穿第一连接部1021的中空的圆柱形结构。其中，第一悬臂102在外力驱动下能够通过第一连接部1021围绕第二枢轴101转动。同时，第一悬臂102的第二连接部1022固定连接于第一导电组件104，也即是第一悬臂102的第二连接部1022与第一导电组件104固定连接，不会发生相对转动。本实施例中，第二方向F2不同于第一方向F1。
当弹性感测元件100产生形变发生弯折时，带动第二枢轴101、第一悬臂102沿着形变方向发生位移，并且同时通过第二枢轴101驱动第一悬臂102相对于第二枢轴101转动，第一悬臂102转动时则带动第一导电组件104绕着第一枢轴103转动。
本实施例中，弯折检测模组10包括两个间隔预定距离的第一悬臂102。第一导电组件104夹设于两个第一悬臂102之间；弹性检测元件100夹设于两个第一悬臂102之间，同时，第二枢轴101贯穿两个第一悬臂102的第一连接部1021以及弹性检测元件100。
较佳地，第二枢轴101与第一悬臂102以及第一导电组件104整合为一体结构。
可变更地，在本发明其他实施例中，折检测模组10可以仅包括一个第一悬臂102。
请参阅图6所示，其为图2所述第一导电组件的立体结构示意图。第一导电组件104还包括限位部104a，第一导电组件104通过限位部104a连接于所述第一悬臂102的第二连接部1022，且用于限定所述第一导电组104相对于所述第一悬臂102的位置。
具体地，限位部104a包括呈圆形中空状的贯穿部104b以及限位筋104c，其中，第一枢轴103穿过贯穿部104b内中空部分，从而使得第一导电组件104能够围绕第一枢轴103转动。
限位筋104c呈长条状凸出设置于贯穿部104的外表面，且限位筋104c卡设于第一悬臂102的第二连接部1022内，从而限定第一导电组件104与第一悬臂 102的相对位置固定，防止第一导电组件104相对于第一悬臂102运动。可以理解，对应限位筋104c，第二连接部1022中空部分具有相应的凹槽结构，当第二连接部1022与第一导电组件104连接时，限位筋104c对应卡设于第二连接部1022中凹槽的位置，从而使得第二连接部1022与第一导电组件104的位置相对固定而不会发生相对位移。
请参阅图7与图8，图7为图1所示柔性显示装置发生弯折时的侧面结构示意图，图8为图1所示弯折检测装置未发生弯折时与发生弯折时侧面结构示意图，结合图1和图7-8进行说明柔性显示屏主体FB的弯折状态与感测电容Cx的电容值变化对应关系。
如图1与图8所示，当柔性显示屏主体FB未发生弯折时，第一导电组件104与所述第二导电组件105围绕所述第一枢轴103正对设置，第一导电组件104与所述第二导电组件105具有正对面积A1(斜线阴影部分)。
其中，电容的计算公式为：C＝ε*ε0*A/d，其中，ε为极板间相对介电常数，ε0真空介电常数，A为两个电极板之间正对面积，d为两个极板之间的距离。由电容计算公式结合本实施例可知，作为两个极板的第一导电组件104与第二导电组件所处环境(ε*ε0)以及二者之间的距离(d)保持不变时，两个电极板之间正对面积(A)发生改变时，作为感测电容Cx的电容值C则随之发生改变。
此时，第一导电组件104与所述第二导电组件105构成的感测电容Cx对应具有第一电容值C0。
如图7-8所示，当柔性显示屏主体FB发生弯折时，第一导电组件104相对于第二导电组件105绕第一枢轴103转动而产生相对运动，第一导电组件104与所述第二导电组件105的正对面积S1改变为A1-ΔA，依据电容的公式可知，且感测电容Cx对应具有第二电容值为C0-ΔC。
可见，通过弯折检测装置CD中的弯折检测模组10将柔性显示屏主体FB的弯折状态通过电容值进行表征，也即是，弯折检测模组10能够将柔性显示屏主体FB的弯折状态转换为感测电容Cx对应的电容值，那么，通过识别感测电容Cx电容值的变化就能够识别出柔性显示屏主体FB是否发生弯折以及发生弯折 的程度。
在本发明其他变更实施例中，若柔性显示屏主体FB从平直的非弯折状态变化为弯折状态，对应的弹性检测元件100驱动第一导电组件104的运动为使得感测电容Cx的中2个极板的正对面积A由小变为大，也即是正对面积由A1变化为A1+ΔA，则感测电容Cx的电容值则由C0变化为C0-+ΔC。
请参阅图9，其为弯折识别电路的电路结构框图。如图9所示，弯折识别电路12电性连接所述感测电容Cx，用于检测感测电容Cx的电容值的改变量并且所述电容值的改变量识别柔性显示屏主体FB的弯折状态。
本实施例中，弯折识别电路12采用调频式测量电路的形式识别感测电容Cx的电容值变化时形成的改变量，也即是弯折识别电路12将感测电容Cx的电容值的变化以及其改变量转换为振荡器频率的变化，再通过振荡器频率变化转换为对应电压的变化，同时电压值的变化及其改变量即可获知柔性显示屏主体FB是否发生弯折以及发生弯折的程度。
具体地，弯折识别电路包括振荡电感L、振荡器121、限幅放大器122与鉴频器123。
其中，振荡电容L电性连接感测电容Cx的两极，也即是电性连接作为感测电容Cx的两极的第一导电组件104与第二导电组件105。本实施例中，感测电容Cx与振荡电感L相互并联。
振荡器121电性连接振荡电感L，感测电容Cx与振荡电感L作为振荡器121作为振荡器121谐振回路的一部分，当感测电容Cx的电容值发生变化时，振荡器的频率随之发生变化。
具体地，振荡器121的频率f与感测电容Cx的对应关系为：
Figure PCTCN2018125067-appb-000001
C1为振荡器固有电容值；
C2为振荡器分布电容值；
Cx为感测电容Cx的电容值。
如此一来，当柔性显示屏本体FB处于未弯折状态，例如平直状态时，振 荡器121的频率
Figure PCTCN2018125067-appb-000002
当柔性显示屏本体FB处于弯折状态时，振荡器121的频率
Figure PCTCN2018125067-appb-000003
其中，△C表征电容值的改变量。
振荡器121将对应感测电容Cx的频率信号进行输出。
限幅放大器122电性连接于振荡器121，用于针对振荡器121包含有频率信号进行放大处理。
鉴频器123电性连接所述限幅放大器122，用于将所述频率信号转换为电压信号。其中，鉴频器123输出的电压信号与频率信号的对应关系请参阅图10，图10为振荡器121频率(横坐标，f)变化与电压(纵坐标，u)坐标关系图，如图10所示，当感测电容Cx发生改变量ΔC的变化时，振荡器121频率就会对应发生Δf的变化，那么使得电压也对应产生ΔU的变化。
如此一来，通过获取的电压信号中ΔU的变化即可获知柔性显示屏主体FB的弯折状态，也即是能够准确获知柔性显示屏主体FB是否发生弯折，以及发生弯折的程度。
可以理解，在本发明其他实时方式中，构成感测电容Cx的第一导电组件104与第二导电组件105还可以依据实际需求为其他形状，例如圆环形、圆柱形、矩形等等，并不以此为限。
相较于现有技术，弯折检测装置CD的结构紧凑，并且能够准确识别到柔性显示屏主体FB的弯折状态，从而便于柔性显示装置FD依据弯折状态执行后续的其他指令，例如执行熄屏、图像分割等。
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种弯折检测装置，用于检测柔性显示屏主体的弯折状态，其特征在于，包括：
    弯折检测模组，包括弹性感测元件、第一导电组件以及第二导电组件，其中，所述第一导电组件与第二导电组件相对设置并且构成感测电容，弹性感测元在所述柔性显示屏主体发生弯折时驱动所述第一导电组件相对于所述第二导电组件产生相对运动，所述感测电容的电容值随所述第一导电组件相对于所述第二导电组件产生的相对运动而改变；
    弯折识别电路，电性连接所述感测电容，用于检测所述感测电容的电容值的改变量并且依据所述电容值的改变量识别所述柔性显示屏主体的弯折状态。
  2. 根据权利要求1所述的弯折检测装置，其特征在于，所述弹性感测元件设置于所述柔性显示屏主体发生弯折的方向上。
  3. 根据权利要求2所述的弯折检测装置，其特征在于，所述第一导电组件转动连接于第一枢轴上，所述弹性感测元件连接于所述第一导电组件，并且所述弹性感测元件随所述柔性显示屏主体发生的弯折驱动所述第一导电组件围绕所述第一枢轴转动，以使得所述第一导电组件相对所述第二电组件发生相对运动。
  4. 根据权利要求3所述的弯折检测装置，其特征在于，所述第二导电组件相对于所述第一枢轴固定于正对所述第一导电组件的位置，当所述柔性显示屏主体未发生弯折时，所述第一导电组件与所述第二导电组件完全正对；当所述柔性显示屏主体发生弯折时，所述第一导电组件相对于所述第二导电组件绕所述第一枢轴转动，并改变所述第一导电组件与所述第二导电组件正对面积且改变所述感测电容的电容值。
  5. 根据权利要求4所述的弯折检测装置，其特征在于，所述弯折检测模组还包括第二枢轴与第一悬臂，所述弹性感测元件固设于所述第二枢轴上，所 述第一悬臂的第一端转动连接于所述第二枢轴上，所述第一悬臂的第二端固定连接于所述第一导电组件，当所述弹性感测元件在所述柔性显示屏主体发生弯折时带动所述第二枢轴沿着所述弯折方向移动，且所述第一悬臂的第一端围绕所述第二枢轴转动以带动所述第一导电组件绕着所述第一枢轴转动。
  6. 根据权利要求5所述的弯折检测装置，其特征在于，所述第一端具有第一连接部，所述第二端具有第二连接部，第一连接部与第二连接部均为中空的圆柱形结构。
  7. 根据权利要求6所述的弯折检测装置，其特征在于，所述第一导电组件还包括限位部，所述第一导电组件通过所述限位部固定连接于所述第一悬臂的第二连接部，所述限位部与所述第二连接部配合以限定所述第一导电组件相对于所述第一悬臂的位置。
  8. 根据权利要求1所述的弯折检测装置，其特征在于，所述弯折识别电路包括振荡电感、振荡器与鉴频器，所述振荡电感与所述感测电容与并联，所述振荡器电性连接于所述振荡电感与所述感测电容以用于感测所述感测电容的电容值的变化且输出对应的频率信号，所述振荡电感与所述感测电容作为所述振荡器谐振回路的一部分，所述频率信号对应所述感测电容的电容值的变化而变化，所述鉴频器电性连接所述振荡器，用于将所述频率信号转换电压信号。
  9. 根据权利要求8所述的弯折检测装置，其特征在于，所述弯折识别电路还包括限幅放大器，所述限幅放大器电性连接于所述振荡器与所述鉴频器之间，用于针对所述频率信号进行放大处理，并且将所述放大处理后的频率信号传输至所述鉴频器。
  10. 一种柔性显示装置，包括柔性显示屏主体与如权利要求1-9任意一项所述弯折检测装置，所述弹性感测件的沿所述柔性显示屏主体发生弯折的方向设置，所述第一导电组件与第二导电组件设置于柔性显示屏边缘。
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