CN106489116A - 用于电子设备的多触摸输入设备的力的分配 - Google Patents
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Abstract
本文公开了用于确定由用户的至少两个手指施加到具有触摸输入表面的触摸输入设备的力的大小的系统和方法。在一个实施例中,系统可包括围绕触摸输入表面分布的多个力传感器;围绕触摸输入表面分布的多个触摸传感器;以及用于将由多个力传感器测量的第一大小的力分配到至少两个手指中的一个手指并且用于将由多个力传感器测量的第二大小的力分配到至少两个手指中的另一个手指的模块。系统还可包括持久性数据结构,该数据结构包括具有响应于施加到触摸输入表面上的各种已知位置的标准化的力由多个力传感器中的每个力传感器测量的具有力挠曲测量值的力校准数据。该系统还可包括一个或多个匹配滤波器模块。
Description
技术领域
本公开整体涉及电子设备的输入设备,以及更具体地涉及触摸输入设备诸如触摸屏或者触控板。
背景技术
电子设备诸如计算设备具有各种输入机制诸如键盘、触摸屏、触控板等等,用户利用这些访问并控制计算设备。
在典型的基于触摸的输入设备诸如触控板或触摸屏中,用户可跨该基于触摸的输入设备的输入表面移动其手指。作为响应,基于触摸的输入设备检测手指的移动。在一些基于触摸的输入设备(例如,触控板和某些鼠标)中,设备可以二进制的方式检测何时用户向下按压输入表面,诸如选择或者占用计算设备上显示的按钮或控件。然而,一般来讲,此类设备不注册或处理可被关联到施加在输入表面上的力的范围的输入的范围。
另外就典型的基于触摸的输入设备而言,如果用户使用两个手指在不同的位置按压输入表面,则输入表面不能确定两个手指所施加的力并且不能将力(或者力的估计)分别分配到由用户触摸的每个区域。即,即使具有一些力感测能力的那些基于触摸的输入设备一般不能在多个同时的输入之间划分力。
本发明人认识到,需要用于在电子设备上检测来自用户的多个触摸输入并且在多个手指输入之间分配所检测到的力的方法和系统。
发明内容
根据本公开的实施方案的一个广泛的方面,本文公开了一种用于确定由用户的至少两个手指施加到具有触摸输入表面的触摸输入设备的力的量的系统。在一个实施例中,系统可包括围绕触摸输入表面分布的多个力传感器;围绕触摸输入表面分布的多个触摸传感器;以及用于将多个力传感器测量的第一大小的力分配到至少两个手指中的一个手指并且用于将多个力传感器测量的第二大小的力分配到至少两个手指中的另一个手指的模块。
在一个实施例中,系统还可包括持久性数据结构,该持久性数据结构包括力校准数据。力校准数据可包括响应于施加至触摸输入表面上的各种已知位置的标准化的力由多个力传感器中的每个力传感器测量的力挠曲测量值。
又如,系统可包括一个或多个匹配滤波器模块。用于分配的模块可包括匹配滤波器模块。
在一个实施例中,触摸传感器可检测同时发生在触摸输入表面上的一个或多个触摸的一个或多个位置。用于分配的模块可提供与由至少两个手指中的一个手指施加在触摸输入表面上的力的大小相关的力数据,并且可提供与由至少两个手指中的另一个手指施加在触摸输入表面上的力的大小相关的力数据。该模块可检查与力校准数据有关的多个力传感器的每个力传感器处测量的力的大小。
在一个实施例中,触摸输入表面可包括响应于由用户的至少两个手指施加的力而挠曲的柔性层,诸如柔性玻璃或透明层。
触摸输入设备可为各种形式,诸如触控板、触摸屏或者其他触摸输入设备。
根据本公开的实施方案的另一个广泛的方面,本文公开了一种用于确定由用户的至少两个手指施加到具有与触摸输入表面相关联的多个力传感器的电子设备的触摸输入表面的力的总和的方法。在一个实施例中,方法可包括提供用于电子设备的校准数据,校准数据包括响应于施加至触摸输入表面上的多个不同的已知位置的标准化的力而由多个力传感器中的每个力传感器测量的力挠曲测量值;检测第一位置处的第一触摸;检测第二位置处的第二触摸;获取由多个力传感器测量的力数据;将由多个力传感器测量的第一大小的力分配到至少两个手指中的一个手指;以及将由多个力传感器测量的第二大小的力分配到至少两个手指中的另一个手指。
电子设备可采取各种形式,诸如智能电话,平板计算设备,便携式计算设备或者其他形式。
根据本公开的实施方案的另一个广泛的方面,本文公开了一种电子设备,该电子设备包括处理器;包括持久性存储器的存储器,该存储器与处理器耦接;响应于由用户的至少两个手指施加到触摸输入表面的一个或多个触摸而变形的柔性触摸输入表面;围绕触摸输入表面分布的多个触摸传感器,触摸传感器检测同时发生在触摸输入表面上的一个或多个触摸的一个或多个位置;围绕触摸输入表面分布的多个力传感器;以及用于将多个力传感器测量的第一大小的力分配到至少两个手指中的一个手指并且用于将多个力传感器测量的第二大小的力分配到至少两个手指中的另一个手指的模块。
在一个实施例中,持久性的存储器可包括力校准数据,该力校准数据具有响应于施加到触摸输入表面上的多个不同的已知位置的标准化的力而由多个力传感器中的每个力传感器测量的多个力挠曲测量值。用于分配的模块可包括匹配滤波器模块。在另一个实施例中,用于分配的模块可提供与由至少两个手指中的一个手指施加在触摸输入表面上的力的大小相关的力数据,并且可提供与由至少两个手指中的另一个手指施加在触摸输入表面上的力的大小相关的力数据。模块可检查与力校准数据有关的在多个力传感器中的每个力传感器处测量的力的大小。
本文描述了本公开的其他实施方案。本公开的各种实施方案的特征、实用性和优点将从如附图中所示的下面对实施方案的更加具体的描述显而易见。
附图说明
图1示出了根据本公开的一个实施方案的具有柔性触摸屏的电子设备的实施例。
图2示出了根据本公开的一个实施方案的具有分布在柔性触摸屏下面的多个力传感器的电子设备的实施例。
图3示出了根据本公开的一个实施方案的用于在电子设备中使用的力分配模块的框图的实施例。
图4示出了根据本公开的一个实施方案的具有结合在其中的力分配模块的电子设备的框图的实施例。
图5示出了根据本公开的一个实施方案的与响应于单位的力施加到电子设备的柔性触摸屏上的各种已知位置的力的分布相关的生成校准数据的实施例。
图6示出了根据本公开的一个实施方案的在按压在柔性触摸屏上的多个输入手指之间分配力的过程的实施例。
图7示出了根据本公开的一个实施方案的响应于用户的两个手指按压在柔性触摸屏上由传感器接收的力数据的实施例。
图8示出了根据本公开的一个实施方案的柔性触摸屏上的力的高斯分布的实施例。
图9示出了可结合本公开的实施方案的具有触摸输入表面的另一个电子设备的实施例。
图10A-C示出了根据本公开的一个实施例的改善匹配滤波器准确性以考虑设备的可能掉落的实施例。
图11A-E示出了根据本公开的一个实施例的改善匹配滤波器准确性以考虑设备的可能掉落的另一个实施例。
具体实施方式
本文公开了用于检测由用户的一个或多个手指形成到电子设备的触摸感测输入表面上的力的位置和大小的机制的各种实施例。机制可提供当检测到按压时用户的手指在触摸输入设备上的位置的坐标以及表示由每个用户的手指引起的按压中的每个按压的力的值作为输出。这样,如果用户使用两个手指用相同的或者不同大小的力在不同的位置按压触摸输入设备,本公开的实施方案可检测这两个按压,确定两个按压的坐标并且确定与两个按压中的每个按压对应的力的大小。
本公开的实施方案可在各种电子设备中使用,诸如(在一个非限制性实施例中)用作移动电话或者平板计算机或者其他便携式电子设备的触摸屏或者与其结合在一起(参见例如图1-2,9中的设备20)。在另一个实施例中,可使用本公开的一个或多个特征、操作或者结构形成触摸板/触控板输入设备。
在一个实施例中,用户用于按压输入设备的力越大,对应的动作在电子设备中越快地发生,诸如滚动更快,移动通过视频更快,以更快的方式高亮文本等等。
参见图1-2,在一个实施例中,具有触摸感测输入表面22的电子设备20被提供具有多个力传感器24或者力传感器24的阵列(图2)。例如,力传感器24可被布置为传感器的周边阵列,分布在电子设备20的表面22周围的传感器的完整阵列或者它们的任何组合。传感器位置是已知的并且相对于电子设备20的触摸输入表面22固定。力传感器24可为一个或多个应变仪,电容力传感器,压力力传感器等等。例如,一个实施方案可采用平行于彼此对齐的电容板,使得施加在输入表面22上的力使板靠近彼此移动。板之间的距离的这种变化可在板之间产生增大的电容。电容的变化可继而被关联到施加在输入表面22上的力的大小。
一般来讲,应当理解,本文公开的实施方案可与任何类型的力传感器一起使用,并且这样先前的实施例旨在为非限制性的。
电子设备20可包括触摸输入表面22,诸如触摸屏。在一个实施例中并且参见图2,电子设备20的触摸输入表面22可包括柔性玻璃或者透明层26,多个触摸位置传感器(已经被触摸位置传感器检测的触摸位置的实施例在图2中示出为28),以及分布在触摸输入表面附近的多个力传感器24。在一个实施例中,柔性玻璃层26可具有相对于电子设备20的主体或者外壳30悬浮的部分(例如,边缘),并且在用户使用一个或多个手指在触摸输入表面22上的一个或多个位置处施加或者按压触摸输入表面22时柔性玻璃部分26可挠曲或弯曲。
当力被用户的手指施加到触摸输入表面22时,所施加的力跨输入表面散布并且由力传感器或多个力传感器24所测量的力响应(例如,挠曲测量值,电容,应变等等)可看起来为钟形曲线(如图7中所示)。
给定一组触摸位置,本公开的实施方案有助于确定或分配由用户手指在触摸输入表面22上的每个触摸引起的相对的力。通过确定与与用户的手指在触摸输入表面22上的每个触摸相关联的力的大小,此类信息可被电子设备处理器(图4)利用以为了用户的利益执行各种功能或操作。应当理解,可通过各种触摸感测技术的任何技术的使用来确定用户触摸位置,诸如电容感测,电阻感测,热感测等等。因此,本文没有更加详细地描述被设计以感测触摸的位置的技术的细节。
如果需要,本文所述的各种特征和功能可被集成到输入设备40中,输入设备40可被结合在电子设备20中。参见图3,输入设备40的一个实施例被示出,其包括多个触摸位置传感器28和多个力传感器24。如先前所讨论的,触摸位置传感器28和力传感器24可为采用不同感测技术的各种不同传感器中的任何传感器。输入设备40还可包括力分配模块42,其从触摸位置传感器28接收位置信息(诸如(x,y)触摸坐标)并且从多个力传感器24接收力数据(诸如力挠曲测量值)作为输入。力分配模块42还可接收力校准数据44,力校准数据44表示响应于施加在输入设备40和/或电子设备20的各种已知位置上的固定单位的力由多个力传感器24接收的力的期望的大小。还可提供匹配滤波器模块46以便有助于确定待分配到输入设备40的用户的手指的每个按压的力的大小。
力分配模块42可被配置为实现本文所描述的一个或多个操作、处理(或它们的部分)、特征或功能。在一个实施例中,力分配模块42确定或分配由多个力传感器24测量的第一大小的力至至少两个手指中的一个手指,并且确定或分配由多个力传感器24测量的第二大小的力至至少两个手指中的另一个手指。
输入设备40可提供由于用户手指的用户按压的位置和力(示出为46)以及由于用户手指的另一个或多个手指的用户按压的位置和力(示出为48)作为力分配模块的输出46、48。例如,在用户采用两个手指在不同位置触摸输入设备的情况下,图3的输入设备40可生成由于用户的两个手指中的每者的按压的位置和力作为输出。这些输出46、48可被传递到与图3的输入设备40进行交互的电子设备20的处理器、逻辑器或其他部件或模块。
在一个实施例中,匹配滤波器技术(例如,如本文所述的)可被模块46使用以确定由在电子设备20的触摸输入设备40上的用户的一个或多个手指的每个触摸引起的力。
在本公开的一个实施方案中并且仍然参见图3,数据库44被保持在电子设备20中,其包括力校准数据,力校准数据表示响应于施加至触摸输入表面(诸如22或者触摸输入表面22的代表性的版本)上的各种已知位置的标准化的力,由多个力传感器24中的每者(诸如24或者传感器24的代表性的版本)测量的力挠曲测量值。在一个实施例中并且参见图5,为了形成力校准数据44,机械手或者其他机械化的、可重复的过程可被用于施加已知大小的力(例如,相同大小的力)到触摸输入表面上的不同已知位置,并且针对每个触摸位置,由力传感器中的每者报告的力挠曲测量值被存储在库44中。实际上,该数据库44形成针对给定触摸位置(X,Y)作为传感器位置的函数的挠曲的图表。该库44可以任何形式存储在电子设备20中,诸如但不限于矩阵、表、查找表、数据库、参数表示或者以任何其他数据结构的形式。
根据本公开的实施方案输入设备40可为独立设备(诸如独立的触控板),或者可被结合到电子设备20诸如移动电话、平板计算机或者其他便携式电子设备中。图4示出了根据本公开的一个实施方案的具有结合在其中的力分配模块42的电子设备20的框图的实施例。在图4的实施例中,电子设备20包括与存储器52、显示器54、电源电路56以及一个或多个传感器58耦接并与其进行通信的处理器50、输入/输出设备60和与处理器50耦接的通信模块62。传感器56可包括多个触摸位置传感器28和多个力传感器24。存储器52可包括持久性存储器或者包括力校准数据44的数据结构,力校准数据44表示响应于施加在输入设备的各种已知位置上的固定单位的力由多个力传感器接收的期望大小的力。
在图4的一个实施例中,处理器50可包括与位置传感器28进行交互并从其接收数据的力分配模块42、力传感器24和力校准数据44。力分配模块42可被配置为实现本文所述的一个或多个操作、处理(或它们的部分)、特征或功能。在一个实施例中,力分配模块42可确定由于用户的手指的用户按压的位置和力以及由于用户的手指中的另一个或者多个手指的用户按压的位置和力。
图5示出了根据本公开的实施方案的各种校准技术的实施例。在操作500处,机械手或其他设备施加已知大小的力到电子设备20的触摸输入表面22上的指定的位置(在图5中示出了示例位置501)。在操作505处,对针对所有触摸位置的挠曲图表进行了分析。换句话讲,记录了响应于操作500的机械性触摸由电子设备20的每个力传感器24检测到的力测量值。
应当理解,力传感器24可不处于力被施加的位置处或者与其邻近。尽管如此,在输入表面可至少一定程度地可变性的范围内力传感器24可注册力,从而允许施加在一个点处的力遍布于区域。因此,最靠近力施加位置的力传感器24可比远离力施加位置的力传感器注册更高的力。因为注册的力可随着力传感器24与力施加位置之间的距离而减小,足够远离力施加位置的力传感器可不注册或者几乎不注册力。
操作500-505针对机械手施加已知大小的力在触摸输入表面22上的不同位置(不是在501处)被重复,直至表示用户在使用期间可以触摸触摸输入表面的区域的足够量的数据被收集。每个力传感器24可因此生成力图表,从触摸输入表面22上的各种已知位置处的各种力的各种测量形成。一般来讲,每个力传感器的力图表不同于其他力传感器的力图表,反映了电子设备内的力传感器的位置的变化。在一些情况下,力图表还可反映每个单独的力传感器之间的差异,诸如敏感性、构造等等。
这样,校准数据的二维分布(力图表)可被制成,诸如在510处所示的。在该公开中力图表(在某些等式中用变量“G”表示)(例如,图8B)表示针对给定力输入值在给定的触摸位置处期望的力响应应该是什么。通过力图表的使用,施加在已知触摸位置处的力,如通过触摸传感器提供的,可被关联到力输入。该信息可被用于在多个触摸位置之间分配总体的检测到的力。
图6示出了根据本公开的一个实施方案的用于在施加力在柔性输入表面上的多个输入手指之间分配力的过程的实施例。(“柔性”或者“可变形”可指承受负载时将局部地变形而不是如刚性主题一样均匀地移动。例如,玻璃可为柔性的/可变形的。)在一个实施例中,这些操作或者它们的部分可被用在电子设备内。在操作600处,一个或多个触摸输入条件被检测。例如,操作600可包括在输入设备的触摸输入表面上检测到触摸,或者可在输入设备的表面上检测到多个触摸。
在操作605处,被操作600检测到的触摸的位置可被确定。在一个实施例中,操作605接收或获取在触摸输入设备的表面上的第一触摸位置的位置信息(例如,(x,y)坐标)。在操作610处,如果存在的话,第二触摸的位置被确定;在一些实施方案中,操作605和610被组合或者以其他方式基本上同时发生。在一个实施例中,操作610接收第二触摸位置的位置信息(例如,(x,y)坐标)坐标。如果其他触摸(例如,来自第三手指的第三触摸)被检测到与第一触摸和第二触摸基本上一起同时发生,这些其他触摸的位置还可从触摸传感器确定。
在操作620处,由触摸输入设备上的每个触摸引起的力的大小可被确定。可是有多个不同的方法执行操作620。在一个实施例中,操作620A-620C被用于确定由每个触摸引起的力的大小。在一个实施例中,这些操作可在电子设备的触摸输入设备的一些或全部触摸力传感器上反复地执行。
在操作620A处,在特定位置处的力传感器处的力值可被获取。在一个实施例中,由特定位置处的力传感器测量的响应于手指触摸的输入通过操作620A被获取或者读取。该输入可被关联到特定力传感器所经受的力。
在操作620B处,针对操作620A的力传感器的力图表数据被检索或者以其他方式被获取。上面一般描述了由每个力传感器生成的力图表。
在操作620C处,由触摸输入设备上的每个手指触摸位置在力传感器位置处引起的力可被确定。在一个实施例中,如本文所述,操作620C可利用匹配滤波器处理以便确定由输入触摸设备上的每个手指按压在特定力传感器位置处引起的力的大小。
在一个实施例中,针对触摸输入设备的每个力传感器位置操作620A-620C可被重复。
从而可看出图6的操作针对检测到的每个触摸提供触摸位置和由该触摸引起的力。该信息可在电子设备内使用用于各种目的,诸如但不限于本文所述的这些目的。
匹配滤波器
在一个实施方案中,触摸输入表面的整个力分布曲线被表征为向量,并且其与在特定力传感器位置处的实际力响应数据的点积被计算,连同其他触摸位置的预测的力响应以及它们与在那些其他位置处的实际力响应测量的点积一起。结果可被分离以确定由用户的第一手指引起的力的大小;并且结果可被隔离以确定由用户的第二手指引起的力的大小;并且如果来自多于两个手指的更多个触摸被检测到,由另外的手指引起的力可被确定。即,操作可将单独的力作为向量归于单独的触摸位置,从而估计来自总体施加的力的施加在每个触摸位置处的力。
点积在操纵或者确定基于向量的值方面是有用的,其中点积操作的结果是标量。例如,对于向量(a,b),“a点积b”可被表示为(a的量值)×(b的量值)×cosine(theta),其中theta是向量a,b之间的角度。表达“a点积b”的另一种方式是(ax×bx)+(ay×by)。
用于两个手指触摸输入的匹配滤波器
在一个实施例中,匹配滤波器被用于确定由在触摸输入表面上的每个手指按压(1,2,...N)引起的力(f1,f2,fn)的大小。可使用线性方程组:
其中
si表示由传感器测量的现在的/当前的力挠曲i=1…N
gi表示针对传感器i期望的挠曲,针对在A处的单位的力(参见图7-8)
hi表示针对传感器i期望的挠曲,针对在B处的单位的力(参见7-8)
在一个实施例中,针对每个力传感器,gi和hi的值可从力校准数据的库获得。可是有下面的示例操作确定由在触摸输入表面上的每个手指的按压引起的力(f1,f2,fn):
针对N个传感器,在一个实施方案中可存在N个方程。
在上述方程的一些具体情况中,例如,当用户的两个手指靠近彼此时,由两个手指产生的期望的挠曲图表是相似的(gi近似于hi),并且分母消失(Δ趋近于0)。针对f1和f2的方程变得高度不稳定,并且si中的任何波动(例如,测量噪音)将被高度放大,由于大的力重建错误。可引入常数λ以保持方程稳定且没有中断部分。
例如,在检测到两个手指接触显示器22的情形中,线性方程的系统可被写作:
并且答案然后变为:
当gi近似于hi时,分母Δλ不再消失并且答案相对于测量波动变得稳定。在改善答案的稳定性的同时,正规化参数λ还降低力重建的准确性(由于针对f1和f2的方程中的另外的关系)。
为了在答案相反稳定并且不需要规则化的情形下保留重建准确性,改变λ的量值是可能的,取决于例如手指之间的距离或者它们在屏幕22上的位置。自适应规则化参数的一个实施例是:
其中r是手指之间的距离。针对小距离(r<ro),函数假设最大值λmax产生大量的规则化:以力重建准确性为代价提高了答案稳定性(在该实施例中,总体施加的力在两个手指之间被等量地分布)。
针对触摸显示器22的手指之间大的间隔距离(r>ro),当答案是稳定的时,规则化是最小的(λ(r)=λmin)并且力重建准确度被改善。
对于其中r近似于ro的距离,规则化参数λ被平滑地降低(例如,在模糊窗口+/-w内)以平衡力重建准确性和稳定性。
换句话讲,常数λ可被用于补偿系统不规则部分,系统不规则部分否则使得方程返回不准确的错误的结果。
在更一般的K个手指的情形中,规则化参数λ可被引入为:
其中gn,k是针对在手指k的位置处的单位的力的传感器n的期望的响应。
用于单个手指触摸输入的匹配滤波器
可使用下面的示例操作确定由在触摸输入表面上的单个手指的按压引起的力(f):
其中
表si表示由传感器i=1…N测量的现在的/当前的挠曲
gi表示当单位的力被施加在给定位置处时针对传感器i期望的挠曲。
在一个实施例中,针对每个力传感器,gi的值可从力校准数据的库获取。
N可等于传感器的总数量,或表示围绕触摸位置(多个)的一小组的传感器。选择可在实施方案之间不同,并且可基于多个因素,诸如实施方案的尺寸,力传感器的间隔,用于输入表面的材料(多种),输入表面的其他物理特性(诸如柔性)等等。
在另一个实施方案中,来自力传感器的子集的数据可被组合在一起并且它们的数据的平均值在应用点积运算之前可被确定。例如,可使用来自力传感器的挠曲测量值形成(2力传感器乘以2力传感器)的数据子集。这可降低待执行的点积计算的数量,其可降低运行运行时间复杂度并且降低处理器执行本文所述的过程需要的存储器,但是导致关于力值较不准确的结果数据。在另一个实施例中,力传感器(或者它们的输出)可通过它们的期望的信号的量值以及施加到包含具有期望的最大值和最小值的传感器之间的成对差异的期望值和测量值的点积运算来分类。例如,此分组可被用于单手指力重建场景中以缓轻可能存在于场景输出中的共模噪声和/或控件关联噪声中。
又如,针对两个或更多个手指,输入(其中k=手指的数量),可使用表达式G点积f=S,其中G被表达为具有与传感器的数量对应的m行的列向量,G具有与手指的数量对应的列。在实施过程中,因为该表达式具有比列多的行,可使用最小二乘过程以最小化[[(G点积f)-s]],其中G被表达为(m乘以k)的矩阵并且f为(k乘以1)的力向量。由此,针对每个手指k的f的值可被确定。
因此,可以看出本公开的实施方案提供用于对由用户的多个手指施加到电子设备的触摸输入表面的测量的力的分配。这样当用户用两个或多个手指触摸触摸输入表面时,可作出由每个手指施加到触摸输入表面的力的大小的确定。该确定可用于向电子设备提供用户输入的另外的维度并且对该设备的控制,这可用于增强用户体验和与电子设备的交互。
在本公开的另一个实施方案中,匹配滤波器的准确性可被进一步增强,如果需要,以说明可发生于电子设备(例如,设备22或40)的可能的损害。在设备的使用期限期间的某些事件可导致边界条件改变,这可导致期望的挠曲图表和观察到的挠曲图表之间的显著的差异。
在一些情况下,部分地补偿这些改变可是可能的,例如,通过改变某些受影响的传感器的读数中的权重(或者可信等级)。在一个实施例中,来自围绕输入表面22的边缘的值的可信度被最小化(基于在设备掉落以后,这些边缘传感器可被不利地影响),并且朝着输入表面22的中心的传感器的可信度被提高(因为在设备的掉落之后这些传感器很有可能是未受损伤的)。例如,针对方程式的系统:
在一个实施例中,代替最小化
最小化运算可在(f)上执行:
例如,动态权重可被与以下项相关:(a)挠曲重心的当前位置,(b)对于给定触摸当前挠曲重心从其期望的位置偏移,(c)感测像素距离设备边界的距离(以便降低对边界条件的依赖),或者指示特定传感器的输出中的可信等级的其他度量标准。
在一个实施例中,改变围绕期望的重心的某些受影响的传感器的读数的权重(或者可信等级)可被提高权重,并且围绕观测到(偏移的)的重心的像素可被降低权重。又如,改变某些受影响的传感器的读数的权重(或者可信等级)可通过提高靠近屏幕22的中心的传感器的权重来实现。
例如,图10A在左侧图像中示出了具有未受损害的边界的挠曲图表的实施例;而在图10A的右边图像中示出了其中边界已经被损坏诸如损坏已经发生在设备的左上角附近并且用户手指按压在左上角附近的情形下的示例挠曲图。
图10B和10C然后示出了在上面段落[0089]的每个方程式中的权重“w”的可能分布。图10B示出了其中老的重心已经被提高权重并且新的重心已经被降低权重的实施例。
又如,图10C示出了其中屏幕中心传感器读数已经被提高权重的实施例,从而为远离设备边界的传感器带来更多的可信度。
在本公开的另一个实施例中,可通过边界传感器减少实现匹配滤波器准确性改善,以便有助于其中传感器由于设备的掉落已经被损坏的情形。
例如,设备边界中的某些损坏可导致针对该边界附近的触摸的显著的顺应提高。对于这些触摸,挠曲重心朝着损坏偏移,并且挠曲形状与具有自由边界部分的部分支撑板(例如,具有力传感器24的板)相似。通过从观测到的挠曲减去“悬臂”模型对这些边界条件部分地补偿是可能的。悬臂模型可通过使代表性形状参数适配于边界传感器观测到的挠曲来确定。
例如,边界传感器不再是加权最小二乘估计的一部分。减去的悬臂模型的量值可与挠曲重心偏移成比例地被进一步缩放。悬臂模型可由重心在屏幕有效区域之外的2D高斯近似。在图11A中,校准的挠曲图表的实施例被示出为其中设备边界未受损伤。在图11B中,挠曲图表的实施例被示出为其中被损害的边界存在于设备显示器的左上角处,并且重心偏移和顺应性增加。在图11C中,实施例示出为其中使用来自边界传感器的数据使用“悬臂”适配模型。在图11D中,悬臂模型被传播到内部中。在图11E中,所调整的图表被示出为其中悬臂模型已经被从图11B观测到的挠曲图表减去。
尽管本公开的实施方案已经相对于平板电脑或者移动电话被描述,应当理解的是,本公开的实施方案可与各种电子设备一起使用,包括但不限于移动设备、移动电话、平板电脑、音乐和多媒体播放器、手表、游戏机以及其他手持、可穿戴或者编写设备。
尽管本文所公开的方法已经相对于以特定顺序执行的特定操作被描述和示出,应当理解的是,这些操作可被组合,在分割或者重新排序以在不脱离本公开的教导内容的情况下形成等同方法。因此,除非本文明确指出,操作的顺序和组合不是本公开的限制。
应当理解的是,本文提供的定向引用诸如顶部、底部、向下、顺时针、逆时针、左、右等等,被提供用于描述本文公开的实施方案的实施例,并且不旨在为限制性的。
应当理解的是,在本公开的示例性实施方案的前述描述中,本公开的各种特征有时在单个实施方案、图或者其描述中中被组合在一起用于流线型或本公开的目的,并且有助于各种方面中的一者或多者的理解。然而,公开的该方法不被解释为反映权利要求需要比每个权利要求中明确引用的特征结构多的意图。相反,具有创造性的方面在于少于单个先前所公开的实施方案的所有特征结构,并且本文所述的每个实施方案可包含多于一个的具有创造性的特征结构。
尽管本公开相对于其实施方案被提供和描述,本领域的技术人员应当理解的是,在形式和细节上的各种其他变化可在不脱离本公开的实质和范围的情况下作出。
Claims (20)
1.一种用于确定力的大小的系统,所述系统在电子设备中,所述力由用户的至少两个手指施加到具有触摸输入表面的触摸输入设备,所述系统包括:
围绕所述触摸输入表面分布的多个力传感器;
围绕所述触摸输入表面分布的多个触摸传感器;和
用于将由所述多个力传感器测量的第一大小的力分配到所述至少两个手指中的一个手指并且用于将由所述多个力传感器测量的第二大小的力分配到所述至少两个手指中的另一个手指的模块。
2.根据权利要求1所述的系统,还包括:
包括力校准数据的持久性数据结构。
3.根据权利要求2所述的系统,其中所述力校准数据包括响应于被施加到所述触摸输入表面上的多个不同已知位置的标准化力而由所述多个力传感器中的每个力传感器测量的力挠曲测量值。
4.根据权利要求1所述的系统,其中用于分配的所述模块包括匹配滤波器模块。
5.根据权利要求1所述的系统,其中所述触摸传感器检测同时发生在所述触摸输入表面上的一个或多个触摸的一个或多个位置。
6.根据权利要求5所述的系统,其中用于分配的所述模块提供与由所述至少两个手指中的一个手指施加在所述触摸输入表面上的力的大小相关的力数据。
7.根据权利要求5所述的系统,其中用于分配的所述模块提供与由所述至少两个手指中的另一个手指施加在所述触摸输入表面上的力的大小相关的力数据。
8.根据权利要求1所述的系统,其中所述触摸输入表面包括响应于由所述用户的所述至少两个手指施加的所述力而挠曲的柔性层。
9.根据权利要求1所述的系统,其中所述模块检查在所述多个力传感器中的每个力传感器处测量的、与所述力校准数据有关的力的大小。
10.根据权利要求1所述的系统,其中所述触摸输入设备包括触控板。
11.一种用于确定力的大小的方法,所述力由用户的至少两个手指施加到电子设备的触摸输入表面,所述电子设备具有与所述触摸输入表面相关联的多个力传感器,所述方法包括:
提供用于所述电子设备的校准数据,所述校准数据包括响应于被施加到所述触摸输入表面上的多个不同已知位置的标准化力而由所述多个力传感器中的每个力传感器测量的力挠曲测量值;
检测第一位置处的第一触摸;
检测第二位置处的第二触摸;
获取由所述多个力传感器测量的力数据;
将由所述多个力传感器测量的第一大小的力分配到所述至少两个手指中的一个手指;以及
将由所述多个力传感器测量的第二大小的力分配到所述至少两个手指中的另一个手指。
12.根据权利要求11所述的方法,其中所述电子设备为智能电话。
13.一种电子设备,包括:
处理器;
包括持久性存储器的存储器,所述存储器与所述处理器耦接;
柔性触摸输入表面,所述柔性触摸输入表面响应于由用户的至少两个手指施加到所述触摸输入表面的一个或多个触摸而变形;
围绕所述触摸输入表面分布的多个触摸传感器,所述触摸传感器检测同时发生在所述触摸输入表面上的所述一个或多个触摸的一个或多个位置;
围绕所述触摸输入表面分布的多个力传感器;和
用于将由所述多个力传感器测量的第一大小的力分配到所述至少两个手指中的一个手指并且用于将由所述多个力传感器测量的第二大小的力分配到所述至少两个手指中的另一个手指的模块。
14.根据权利要求13所述的电子设备,其中所述持久性存储器包括力校准数据,所述力校准数据具有响应于被施加到所述触摸输入表面上的多个不同已知位置的标准化力而由所述多个力传感器中的每个力传感器测量的多个力挠曲测量值。
15.根据权利要求13所述的电子设备,其中用于分配的所述模块包括匹配滤波器模块。
16.根据权利要求13所述的电子设备,其中用于分配的所述模块提供与由所述至少两个手指中的一个手指施加在所述触摸输入表面上的力的大小相关的力数据。
17.根据权利要求13所述的电子设备,其中用于分配的所述模块提供与由所述至少两个手指中的另一个手指施加在所述触摸输入表面上的力的大小相关的力数据。
18.根据权利要求13所述的电子设备,其中所述柔性触摸输入表面包括柔性玻璃层。
19.根据权利要求14所述的电子设备,其中所述模块检查在所述多个力传感器中的每个力传感器处测量的、与所述力校准数据有关的力的大小。
20.根据权利要求14所述的电子设备,其中所述电子设备包括平板计算设备。
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US20170038905A1 (en) | 2017-02-09 |
AU2014391723A1 (en) | 2016-11-10 |
CN106489116B (zh) | 2019-08-16 |
WO2015163842A1 (en) | 2015-10-29 |
AU2014391723B2 (en) | 2018-04-05 |
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