CN101105733A - Multiple point touch localization method - Google Patents

Multiple point touch localization method Download PDF

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Publication number
CN101105733A
CN101105733A CN 200710028038 CN200710028038A CN101105733A CN 101105733 A CN101105733 A CN 101105733A CN 200710028038 CN200710028038 CN 200710028038 CN 200710028038 A CN200710028038 A CN 200710028038A CN 101105733 A CN101105733 A CN 101105733A
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touch
point
multi
position
touch point
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CN 200710028038
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CN100590579C (en
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卢如西
周春景
李军明
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广东威创日新电子有限公司
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control and interface arrangements for touch screen

Abstract

The invention provides a multi-point touch positioning method applied in touch screen systems, which contains the following steps: (a). Measure touch signals, judge signal changing situation, calculate touching location coordinates and/or shape and size of touch points; (b). judge signal-point or multi-point touch according to quantity change of location coordinates--if single-point touch, single point operations will be implemented by touch screen system, otherwise, turn to step (c); (c). determine whether there is any new touch points added or left or not by comparing quantity change of location coordinates and/or change of coordinate value. If there are new touch points added, register new touch points information and record location coordinates of new touch points. If there are touch points left, then clear those points information. The invention has wider application range but lower cost, and realizes multi-point touch positioning.

Description

一种多点触摸定位方法 A multi-touch positioning method

技术领域 FIELD

本发明涉及一种用于交互显示系统的触摸定位方法,特别涉及一种可以区分多个触摸点同时操作的多点触摸定位方法。 The present invention relates to a method of locating a touch for an interactive display system, particularly to a multi-touch can distinguish multiple touch points simultaneously positioning method of operation.

背景技术 Background technique

目前,触摸屏作为一种代替或补充普通键盘和鼠标的输入设备已经在许多场合和领域得到了广泛使用。 At present, the touch screen as an alternative to or in addition to ordinary keyboard and mouse input devices has been widely used in many applications and fields. 在现有的触摸屏中,检测触摸地点的定位检测技术可以基于不同的技术,包括红外、摄像头、表面声波等。 In the conventional touch screen, detecting a touch location detection technique may be based on the location of different technologies, including an infrared camera, a surface acoustic wave. 用户通常不需要经过特别的操作训练,只需要在有关图符标出的地点按触摸屏,就能实施一连串复杂的指令。 Users typically does not require special training operation, only at the location indicated by the relevant icon touch screen can implement a series of complex instructions.

为了计算触摸事件发生的位置,触摸屏系统一般通过测量触摸系统检测元件或单元输出信号的变化情况来确定触摸地点,算出触摸点的位置坐标。 In order to calculate the position of a touch event occurs, the touch screen system a touch location is typically determined or detecting element unit changes the output signal by measuring the touch system, the position coordinates of the touch point is calculated. 在目前的触摸系统中,在给定的时段内,触摸屏检测系统只接收唯一一组位置坐标数据,因此在经过校准的触摸屏系统中能准确确定触摸点发生的位置,不会发生报告错误触摸位置的情况。 In the current touch system, within a given period of time, the touch screen detection system only receives a unique set of position coordinate data, it is possible to accurately determine the position of the touch occurs calibrated touch screen system, the report does not occur false touch the position of. 如果在给定时段内把两个或两个以上的触摸地点都按下,则多个触摸信号就会在该时段重叠起来,如果不加选别直接用这些信号计算触摸地点,则会使检测系统报告的触摸地点不是实际触摸的地点。 If, within a given period of time the two or more touch locations are pressed, the plurality of signals will be superimposed on the touch up period, if not the touch location is calculated directly sorting using these signals, the detection will the system reported touch location than the actual touch location. 如图l Figure l

所示,ioi是现有的使用正交矩阵检测方式的触摸屏系统,该触摸屏系统可能釆 Shown, IOI is detected using a conventional orthogonal matrix type touch screen system, the touch screen system may preclude

用红外定位技术或其它技术,检测系统检测到触摸屏上第一个地点102发生的触摸事件,生成第一组定位坐标数据,测定出第一个触摸事件发生的实际地点。 Infrared detection location technology, or other techniques, the system detects the first touch event is a touch-screen location 102 occurs, generating a first set of positioning coordinates data, the measured actual location of the first touch event occurs. 当用户离开第一个触摸地点102而触摸第二个地点103时,就生成第二组触摸信 When the user leaves the first touch location 102 and a second touch location 103, to generate a second set of touch channel

号,可以测定出第二个触摸事件发生的实际地点。 No, we can assess the actual venue of the second touch event occurs. 如果在给定时段内把第一个触摸地点102和第二个触摸地点103都按下,则第一组信号和第二组信号就会在该时段重叠起来,检测系统会算出多个位置坐标数据,由此得出的触摸地点可能是102、 103、 104、 105其中的一个,这样,触摸屏系统将报告错误的触摸位置,不能正确地响应用户的操作。 If, within a given period of time the first touch location 102 and a second touch location 103 are pressed, the first set of signals and the second set of signals will be piled up in this period, the plurality of position coordinate detection system is calculated data, thereby resulting touch locations may be 102, 103, 104, 105 of which one so, the touch screen system a touch location reporting the error, can not properly respond to user actions.

这样的情形不仅发生在釆用正交检测定位技术触摸屏中,在使用其它原理的触摸屏系统中同样存在。 Such a situation occurs not only in location technology preclude the use of quadrature detection in a touch screen, the touch screen also exists in the other system in principle. 如图2所示,201是通过计算角度来确定触摸点位置 2, 201 is determined by calculating the touch point position of the angle

坐标的触摸屏系统,该触摸屏系统可能釆用多个摄像头定位技术或其它技术, 触摸屏系统检测到第一个触摸地点202的触摸事件时,可以根据角度关系计算出 When the coordinates of a touch screen system, the touch screen system may preclude the touch event is detected first touch location 202 by a plurality of cameras positioned or other technologies, touch screen system, the relationship can be calculated based on the angle

该触摸事件发生的实际地点,当用户离开第一个触摸地点202而触摸第二个地点203时,触摸屏系统同样可以计算出该触摸事件发生的实际地点。 The actual location of the touch event occurs when a user leaves the first touch location 202 and a second touch location 203, the touch screen system can also calculate the actual location of the touch event occurred. 如果在给定时段内把第一个触摸地点202和第二个触摸地点203都按下,检测系统会算出多个位置坐标数据,由此得出的可能触摸地点为202、 203、 204、 205其中的一个, 由于现有的触摸屏检测系统只接收唯一一组位置坐标数据,这样,触摸屏系统就会报告错误的触摸位置,直接导致错误的用户输入指令。 If, within a given period of time the first touch location 202 and a second touch location 203 are pressed, the system detects a plurality of position coordinate data is calculated, thus resulting possible touch locations 202, 203, 204, 205 one of them, since the conventional touch screen detection system receives only a single set of position coordinate data, so that the touch screen system a touch location of an error is reported, direct user input commands result in an error.

由于上述原因,现有的触摸屏技术在某些场合就会失效。 For the above reasons, the existing touch screen technology in some cases will fail. 例如,对于普通键盘来说的一些常用功能在目前的触摸屏系统中一般见不到,如同时按两个或更多按键就能进入专用键盘功能执行特定的操作。 For example, for ordinary keyboards some common features of a touch screen in the current system is generally not seen as pressing two or more keys simultaneously to enter the special keyboard functions can perform certain operations. 又例如在两个或更多游戏者玩的电子游戏中,游戏者希望可以用单一触摸屏同时输入信息。 In another example, two or more players to play video games, a player can hope to enter information at the same time with a single touch screen. 虽然每个人在游戏时可以使用独立预定的触摸屏部分,但是在各人搡作其触摸屏部分时,会出现许多重叠的触摸现象,这样会造成游戏响应不符合一个或多个游戏者的意愿。 While everyone can use a separate predetermined touchscreen section in the game, but when everyone shoving as part of its touch screen, there will be many overlapping phenomenon of touch, this will result in a game response does not meet the wishes of one or more players. 尽管这种情况可以通过一些方法来改善,比如让每个人使用独立的专用触摸屏,但是考虑到成本、空间限制、功能等因素,这种方法并不能理想地解决问题。 Although this situation can be improved through a number of methods, such as making everyone on a separate dedicated touch screen, but considering the cost and space constraints, function and other factors, this method is not an ideal solution to the problem. 在以上和其它许多实例与应用中,基于单点触摸响应的触摸算法是无法完成对多个同时的触摸正确响应的,因此在这类场合中极大地限制了触摸屏的应用。 In the above and many other examples and applications, a single touch on touch algorithm is unable to complete the response to the multiple simultaneous touch of correct responses, and therefore in such occasions greatly limited the application of the touch screen.

鉴于目前触摸屏系统存在的上述不足,提供一种可以实现多点触摸定位的方法实为必要。 In view of the above deficiencies existing touch screen system, there is provided a method for positioning a multi-touch may be implemented as a real need.

发明内容 SUMMARY

本发明的目的在于针对现有技术中所存在的问题提供一种用于触摸屏系统、可以识别两个或两个以上的触摸操作、实现多点同时触摸时也能报告有效触摸位置的多点触摸定位方法。 Object of the present invention to provide the prior art for the problems A touch screen system is used, can identify the two or more touch operation, but also to achieve more efficient reporting multi-touch touch position positioning methods.

为达到上述目的,本发明采用以下技术方案: To achieve the above object, the present invention employs the following technical solution:

一种用于触摸屏系统的多点触摸定位方法,用于判别两个或两个以上的点的同时触摸事件,包括以下步骤: A method for positioning a multi-touch touch screen system used for determining two or more simultaneous touch points event, comprising the steps of:

a、 测量触摸信号,判断信号变化情况,计算触摸事件发生的位置坐标 a, measured touch signal, the change determination signal, computing a position of a touch event occurs

和/或触摸点的形状大小; And / or the shape and size of the touch point;

b、 根据位置坐标数量的变化情况,判断触摸信息是单点触摸还是多点触摸,若为单点触摸,则触摸屏系统相应地执行单点触摸的各项搡 B, according to the number of changes of the position coordinates, whether the touch is a single touch information or multi-touch, if a single-point touch, the touch screen system accordingly performs a single touch of the push

作,若为多点触摸,则进入步骤c; For, if the multi-point touch, step C;

c、 比较本计算周期和上一个计算周期检测到的位置坐标数量的变化 c, comparing a present calculation cycle is calculated and the position coordinate detection period to change the number of

和/或坐标数值的变化,判断是否有新的触摸点加入或者有触摸点离开,如果有新的触摸点加入,注册新触摸点信息,记录新触摸点 And / or a change of a coordinate value, it is determined whether a new touch point of a touch point is added or leave, if there is added a new touch point, to register a new touch point information, recording a new touch point

的位置坐标,如果有触摸点离开,则注销已离开的触摸点信息; The position coordinates, if a touch point left, then log out of touch point information has left;

d、 比较本计算周期与上一个计算周期检测到的坐标数值U, Y)的变 d, the coordinate values ​​U comparing the detected present calculation cycle and the previous calculation cycle, Y) becomes

化情况,将坐标值(x,Y)与已经注册的触摸点的当前位置坐标进行比较,判断各触摸点的运动情况; Of the case, the coordinate values ​​(x, Y) and the current position coordinates of the touch point has been registered, and determines the movement of the respective touch points;

e、 计算并判断出位置发生变化的触摸点,并将最新的坐标值赋予该触摸点。 E, is calculated and it is determined that the touch point is changed, and the latest coordinate values ​​assigned to the touch point.

在上述的步骤中,根据实际的应用场合,可以只选择其中的几个步骤,而不是使用所有步骤,例如在只需要判断多个触摸点不需要判断各点移动情况时, In the above steps, depending on the actual application, can select only a few of these steps, instead of using all of the steps, for example, when only required to judge a plurality of touch points necessary to determine movement of each point,

可以只使用其中的步骤a到步骤c,在需要判断多个点的移动情况,而不需要再现各点运动轨迹时,可以只使用步骤a到步骤d。 It may be used only to a step of the step C, when the need to determine the movement of a plurality of points, each point without reproducing the trajectory, a step may be used only to Step d. 应用本发明中的多点触摸定位方法,触摸屏系统在判别'两个点或两个以上的点的同时触摸事件时,在检测速度足够快的情况下,可以分辨出"同时"发生的触摸事件在时间上的差别,根据触摸事件的先后顺序,先确定一个触摸点的坐标值,将其注册并保存起来, 当下一个触摸事件发生时,根据触摸屏系统计算的位置坐标值,结合已注册的触摸点位置坐标,分析并从中分离出新的触摸事件发生的位置坐标,这样就可以完成新触摸点的坐标识别。 The application of the present invention is a multi-touch positioning method, touch screen system when it is judged "more than two points or two points, while the touch event is detected at a sufficiently fast speed, can distinguish touch event" simultaneous "occurs the difference in time, according to the order of the touch event, first determine the coordinate values ​​of a touch point, be registered and saved when the next touch event occurs, the position of the coordinate values ​​of the touch screen system computing, combined with touch registered point position coordinates, analyzes and separates the new position coordinates of the touch event occurs, so that you can complete coordinate recognize the new touch point. 在正确识别各个触摸点之后,再根据触摸屏系统检测到的触摸位置坐标变化情况对多个同时操作的触摸点进行跟踪识别,从而实现对各个触摸点移动之后位置坐标的有效识别。 After the touch point correctly identified each touch point, and then detected by the touch screen system a touch position coordinates of multiple simultaneous changes of track identification, thereby achieving efficient identification of the position coordinates after movement of the respective touch points.

更进一步,所述步骤b中判断触摸信息是单点触摸还是多点触摸的方法为-. 如果在一段时间内,只有一组位置坐标值,则判断为单点触摸,若在一段时间内,检测到的位置坐标值有两组或者两组以上,则认为存在多个触摸点。 Still further, the touch information determined in step b is a single-touch or multi-touch method - if the period of time, only one set of position coordinate value, it is determined that the single-touch, if a period of time, the detected position coordinate values ​​of two or more than two, that there is a plurality of the touch points.

为更好的区分多个触摸点,可以采取的一种方法为:在确定触摸点位置坐标的同时,依据触摸点在触摸时引起的在不同坐标方向(X, Y方向)的检测单元数量和/或数值变化规律,检测出触摸点的形状大小,根据形状大小标记并进一步识别不同的触摸点。 A method for the better distinguish multiple touch points may be taken as follows: in determining the position coordinates of the touch point while the number of different coordinate directions (X, Y direction) of the detection unit based on a touch point caused when a touch and / or variation values ​​detected shape and size of the touch point, and to further identify different touch points according to the shape and size marker. 触摸点形状大小的检测方法随着具体检测技术的不同而有差别。 The method of detecting a touch point with different shapes and sizes and specific detection technology difference. 对于使用多个摄像头或镜头定位技术的触摸屏,通过检测触摸点相距各个摄像头的距离远近,结合摄像头拍摄到的触摸点的形状,也可以计算出各触摸点的形状大小。 Using multiple cameras or lens positioning technology touchscreen, a touch point by detecting a distance from the respective distance of the camera, in conjunction with the camera to take the shape of the touch points, the shape can also be calculated size of each touch point.

在步骤C中,由于触摸点的增减变化是随机的,情况比较复杂,可能会发生有触摸点离开的同时又有新的触摸点加入,对于新触摸点的判别、注册以及注销需要根据使用场合或使用领域的不同制定有针对性的方案,通常需要经过反复实验来确定一个较符合实际使用情况的定义方法或机制。 In step C, due to the increase or decrease in the touch point is random, the situation is more complex, while leaving the touch points may occur have added a new touch point for the new touch point identification, registration and cancellation need to use or the use of different occasions to develop the field of targeted programs, usually takes trial and error to determine a method or mechanism more in line with the definition of actual usage. 但无论怎样,看似同时发生的事件,只要检测速度足够快,通过细分,总可以分辨出事件发生的先后次序。 But no matter how seemingly simultaneous events, as long as the speed is fast enough to detect, by subdivision, you can always tell the order of events.

所述步骤e中计算并判断出位置变化的触摸点的方法包括以下步骤: The calculating method is determined in step e and the change in position of the touch point comprises the steps of:

i、 根据测量信号,计算触摸位置的坐标位置(X,Y); i, the measurement signal, calculates the coordinate of the touch position (X, Y);

ii、 计算坐标值U, Y)与相邻的各个触摸点当前坐标之间的距离, 其中与第一个点;之间的距离为A,与第二个点^之间的距离为A,……,与第n个点7;之间的距离为Z)。 II, calculate the coordinate value U, Y) adjacent to the respective current distance between the touch point coordinates, wherein the first point; is the distance between A, and the distance between the second point is ^ A, ......, n th point 7; is the distance between Z). ,则 ,then

化=扭"-对+,)-"2 , = Twist of "- to +) -" 2,

iii、 比较计算所得得距离值A, A,……,化,找出最小值A, 其中Dm=Min(A, A,……确定与z^对应的位置发生 III, comparing the calculated distance value to obtain A, A, ......, of, find the minimum value A, where Dm = Min (A, A, ...... determining a position corresponding to the occurrence of z ^

变化的触摸点?;; Touch point change? ;;

iv、 用目前计算周期内检测到的位置坐标(X, Y)代替距离值最小 iv, the current calculation cycle by the detected position coordinates (X, Y) instead of the minimum distance value

的触摸点?;的现有位置坐标。 Touch point;? Existing location coordinates.

所述步骤ii中的与坐标值(X, Y)相邻的触摸点7; (x, y)的判断方法通过采用检测坐标值变化的范围、检测坐标值变化的速率或者检测坐标值变化的方向趋势的方法来判定。 The coordinate values ​​in step ii (X, Y) adjacent to the touch point 7; (x, y) is determined by using the method of detecting changes in the range of coordinate values, the coordinate values ​​of the rate of change of the detection coordinate value or detecting a change in a method to determine the direction of the trend.

本发明中所采用的触摸定位检测技术为红外线技术、摄像头技术或者其它 The touch location detection techniques employed in the present invention is an infrared technology, or other camera technology

技术。 technology.

本发明的多点触摸定位方法与现有的单点触摸技术相比,具有以下优点: Compared with the prior art single-point multi-touch touch location method according to the invention has the following advantages:

一、 不需要增加硬件成本即可实现多点触摸定位。 First, the need for additional hardware cost to implement multi-touch positioning.

二、 可以用于各种检测原理的触摸屏,尤其是使用红外定位、摄像头定位技术的触摸屏。 Second, various detection principles can be used a touch screen, in particular the use of infrared positioning, the camera positioning art touch screen.

三、 应用范围更广泛。 Third, the wider range of applications. 既能实现单点触摸,又可以实现多点触摸,完成现有触摸屏无法完成的多人同时操作功能,可以应用于更多的领域和场合。 Both single-touch, multi-touch and can complete the existing touch screen can not be completed over the same time operating functions can be applied to more areas and occasions.

附图说明 BRIEF DESCRIPTION

图i是现有技术中的一种触摸屏工作示意图; FIG. I A touch screen is a schematic view of the work in the prior art;

图2是现有技术中的另一种触摸屏工作示意图; FIG 2 is a schematic view of another touch screen working in the prior art;

图3是本发明实施例有两个点在触摸的示意图; FIG 3 is an embodiment of the present invention, there are two touched points in the schematic;

图4是本发明实施例流程示意图; FIG 4 is a diagram illustrating the process embodiment of the present invention;

图5是本发明判断触摸点移动的流程图。 5 is a flowchart of the present invention determines the touch point movement.

具体实施方式 Detailed ways

根据本发明的多点触摸定位方法,对于图1所示的触摸屏系统,当102和103同时发生触摸事件时,首先根据触摸事件102和103在发生时间上的先后差别,记录第一个触摸事件发生地点的坐标为(xl, yl),注册并保存这个触摸点。 The multi-touch positioning method of the present invention, the touch screen system of FIG. 1, 102 and 103 when the touch event occurs at the same time, according to the touch event has first 102 and 103 the difference in time of occurrence of a touch event records place the occurrence of coordinates (xl, yl), register and save the touch point. 当第二个触摸事件叠加到第一个触摸事件上时,系统会检测到多组位置坐标(xl, x2, yl, y2),从而判断出有新的触摸点加入,通过比较现有的注册点位置坐标(xl, yl),排除其它坐标(xl, y2)、 (x2, yl )的可能,由此确定新加入的触摸点坐标为(x2, y2),这样就可以区分出两个触摸点102、 103。 When the second touch event is superimposed on the first touch event, the system detects the plurality of sets of position coordinates (xl, x2, yl, y2), to determine the new touch point is added, by comparing the conventional registration point position coordinates (xl, yl), exclude other coordinates (xl, y2), (x2, yl) possible, thereby determining the coordinates of the touch point is newly added (x2, y2), so that the two touch can be distinguished points 102, 103.

同样地,对图2所示的触摸屏系统,应用本发明的方法,也可以较容易区分出两个触摸点202、 203。 Similarly, the touch screen system shown in FIG 2, application of the method according to the present invention, may be easier to distinguish between two touch points 202, 203. 方法与步骤如前所述,此处不予赘述。 The method steps as described above, are not repeated here.

图3是本发明的方法应用有两个点同时触摸场合的一个具体实施例,这种情况多发生在多人同时书写或多人游戏等场合。 FIG 3 is a method of the present invention has simultaneously touched two points where a particular embodiment, this occurs in people while writing or multiplayer game and so on. 参见图3所示,301是触摸屏设备,该触摸屏设备所釆用的定位检测技术可以是红外技术也可以是摄像头定位技术或其他技术。 Referring to FIG. 3, the device 301 is a touch screen, the touch screen device that preclude the use of location detection technique may be an infrared camera may be positioned or other techniques. 302是一个触摸点,其触摸操作的轨迹为303。 302 is a touch point, the track 303 which is a touch operation. 在另一位置, 另外一个触摸点304也在同一触摸屏上操作,该触摸点304可能来自同一个用 In another position, a further 304 at the same point on a touch screen touch operation, the touch point 304 may be from the same with

户也可能来自不同的用户,306是某一时刻触摸点304的一个触摸位置,其操作的轨迹是305。 Users may be from different users, 306 is a time of a touch point touched position 304, the track 305 is operative. 在现有技术中的触摸屏中,由于只能够响应单点触摸,因此,当只有一个触摸点302或者304在触摸屏上操作时,触摸屏可以正常的工作。 In the prior art, a touch screen, since only capable of responding to a single touch, and therefore, when only one touch point 302 or 304 operation on the touch screen, the touch screen can work properly. 而对于图示中所示出的两个触摸点同时触摸的情况,触摸屏将无法报告正确的触摸地点,从而出现错误的响应。 For two touch points shown in the illustrated case of the simultaneous touch, the touch screen will not report the correct location of the touch, so that the error response.

下面结合图3说明触摸事件被判断和识别的过程。 Process described below in connection with FIG. 3 touch event is determined and identified.

参见图3,触摸点302和304同时在触摸屏上操作,在识别触摸点302和触摸点304时,检测系统根据触摸事件发生的先后,可以先确定一个触摸点的触摸事件,将其坐标位置注册并保存起来;在下一个计算周期内,根据计算的触摸坐标值,与已经注册保存的触摸坐标值相比较,从计算得到的触摸坐标中分离出另外一个触摸点的触摸位置坐标值,同样将其注册并保存。 Referring to FIG. 3, the touch points 302 and 304 at the same time on a touch screen operation, 304, the detection system according to have a touch event occurred can first determine the touch event a touch point is recognized touch point 302 and touch point, the coordinates location registration and save them; the next calculation cycle, the touch coordinate values ​​calculated, compared with already registered saved touch coordinate values, the separated touch position coordinate value of another touch point from the touch coordinate calculation obtained, similarly to Sign up and save. 这样触摸屏系统就完成了两个触摸点的区分与识别,接下来就可以根据触摸位置坐标的变化情况对多个同时操作的触摸点的运动趋势进行跟踪识别。 Such touch screen system is completed with identification to distinguish the two touch points, the next track can be identified based on movement trend of changes of the touch point of the touch position coordinates of a plurality of operating simultaneously.

图4是本发明实施例多点触摸实现方法的示意流程图,其主要包括如下步 4 is a schematic flowchart of a method implemented according to embodiments of the present invention is a multi-touch, which may include the following steps

骤: Step:

a、 触摸屏检测系统测量触摸信号,判断信号变化情况,计算触摸事件发生的位置坐标E (X,Y),它可能包含一组或多组坐标数据,是一个坐标数 a, touch screen detects a touch signal measurement system determines changes of signals, computing a position E (X, Y) touch event occurs, it may contains one or more sets of coordinate data, a coordinate number

据的集合;有需要时,还可以计算出触摸点的形状大小; Data set; when necessary, the shape can also be calculated size of the touch point;

b、 根据位置坐标数量的变化情况,判断触摸信息是单点触摸还是多点触 B, according to the number of changes of the position coordinates, whether the touch information is a single or multi-touch touch

摸,如果在一段时间内,只有一组位置坐标值(X, Y),则判断为单点 Touch, if a period of time, only one set of position coordinate values ​​(X, Y), a single point is determined

触摸,触摸屏系统相应地执行单点触摸的各项操作,如书写,点击等, 若一段时间内,检测的位置坐标值多于一组,则可判断为存在多个触摸 The touch operation, the touch screen system accordingly perform single-touch, such as writing, clicks, etc., when a period of time, the coordinate values ​​of the position detecting more than one set can be judged that there is a plurality of touch

点,进入步骤c; Point, proceeds to step C;

c、 比较本计算周期和上一个计算周期检测到的位置坐标数量的变化和/ 或坐标数值的变化,判断是否有新的触摸点加入或有触摸点离开,如果有新的触摸点加入,注册新触摸点信息,记录新触摸点的位置坐标,若有触摸点离开则注销已离开触摸点的信息,为跟踪识别各个触摸点的位置,在第P个计算周期内,记录各个触摸点的位置坐标,第一个点记录为;(Xp, Yp),第二个点记录为? Variation C, the number of comparing the present calculation cycle and the previous calculation cycle of the detected position coordinate change and / or a coordinate value, it is determined whether a new touch point added or touch points left, if there is a new touch point join, the new touch point information, the recording position coordinates of a new touch point, the touch point if the logout information has been away from the touch point, the touch point to track the location of individual identification, in the first calculation cycles P, the recording position of each touch point coordinates, the first point for the record; (Xp, Yp), the second point is recorded as? ; (Xp, Yp),……第N个点记录为r„ (Xp, Yp); ; (Xp, Yp), ...... N-th dot recording is r "(Xp, Yp);

d、 比较本计算周期与上一个计算周期检测到的坐标数值(X, Y)的变化情况,将坐标值(X,Y)与已经注册的触摸点的当前位置坐标进行比较, 判断各触摸点的运动情况; d, the coordinate values ​​(X, Y) comparing the present calculation cycle detected by the previous calculation cycle changes, the coordinate values ​​(X, Y) and the current position coordinates registered touch points, and determines each touch point the movement;

e、 计算并判断出位置发生变化的触摸点,并将最新的坐标值赋予该触摸点。 E, is calculated and it is determined that the touch point is changed, and the latest coordinate values ​​assigned to the touch point.

本实施例中,设定事先预知是两个触摸点操作,在步骤3中,对新触摸点的识别和注册就可以通过监测触摸坐标值数量的变化来实现,这个过程相对比较容易。 In this embodiment, two touch is known in advance set point operation, in Step 3, the new touch point identification and registration can be achieved by monitoring the number of touching a coordinate value changes, this process is relatively easy. 但是,如果有两个以上的触摸点操作,由于触摸点的增减变化是随机的, 情况比较复杂,在有触摸点离开的同时可能又有新的触摸点加入,对于新的触摸点的判别、注册以及注销就需要根据触摸屏使用的场合或者使用领域的不同而制定有针对性的方案,通常可通过反复试验来确定一个较符合实际情况的判断方法或机制。 However, if there are two or more touch points to operate, due to the increase or decrease in the touch point is random, the situation is more complex, while a touch point of departure may have added a new touch point for the new touch point discrimination , you need to register and log out and develop according to different occasions using the touch screen or use in the field of targeted programs, usually can be determined more in line with a method or mechanism to determine the actual situation by trial and error. 但从根本上来说,看似同时发生的事件,只要检测速度足够快, 通过细分,总是可以分辨出事件发生的先后顺序。 But fundamentally, seemingly simultaneous events, as long as the speed is fast enough to detect, by segment, you can always tell the sequence of events.

参见图5所示,步骤5中判断触摸点的位置坐标变化的方法主要包括以下步 Referring to Figure 5, the method of determining a touch point position coordinate changing step 5 includes the following steps

《i、根据测量信号,计算触摸位置坐标位置(X, Y)。 "I, the measurement signals, calculating a touch position coordinate position (X, Y).

ii、 计算坐标值(X, Y)与相邻的各个触摸点当前坐标之间的距离,其中与第一个点t;之间的距离为久,与第二个点i;之间距离为A,……, 与第n个点r"之间的距离为化,则 II, calculates the coordinate value (X, Y) adjacent to each touch point distance between the coordinates of the current, wherein the first point T; is the distance between the long and the second point I; distance between distance between a, ......, n th points r "is based, the

A = V,)-对+ [7,200-112 , A = V,) - to + [7,200-112,

在本实施例中,各个触摸点发生触摸事件是连续的,与坐标值(X, Y) In the present embodiment, each touch point of a touch event occurs continuously, with the coordinate values ​​(X, Y)

相邻的触摸点?; (x, y)的判断方法就可以釆用检测坐标值变化的范围或 Adjacent touch point;? (X, y) can preclude the method of determining the range of a detected coordinate values ​​varying or

检测坐标值变化的速率的方法,即预先设定每个计算周期内坐标值的变化 The method of detecting a change rate of the coordinate value, i.e., the change in each predetermined calculation cycle coordinate value

范围,当(X, Y)数值落在某几个触摸点的坐标值变化范围内时,就可以认为这几个触摸点在坐标值(X, Y)的附近,可能是其中的一个触摸点位置发生移动。 Range, when the (X, Y) falls a few numerical coordinate values ​​of the touch point range, these can be considered near the touch point coordinate value (X, Y) may be a touch point where shifted in position. 若各个触摸点发生的触摸事件是非连续的,判断坐标值U, Y)相邻的触摸点7; (x, y)的方法就要结合触摸屏实际使用场合来确定。 If a touch event occurs each touch point is discontinuous, it determines a coordinate value U, Y) adjacent to the touch point 7; (x, y) is to combine the method of the touch screen to determine the actual use situations. iii、 比较计算所得的距离值A, "2,……,化,找出最小值^, III, comparing the calculated distance value obtained by A, "2, ......, of, find the minimum value ^,

Z)m -Min(A,A,……确定与化对应的位置发生变化的触摸点rM。 Z) m -Min (A, A, ...... rM touch point determining changes corresponding to the position of.

iv、 用目前计算周期内检测到位置坐标(X, Y)代替距离值最小的触摸点L现有的位置坐标。 iv, detected within the current period to calculate the position coordinates (X, Y) was used instead of the minimum value of the distance L existing touch point position coordinates.

经过上述的计算,可以正确找到位置发生变化的触摸点,该触摸坐标是由触摸点304移动产生的,表明触摸点304已经从上一个坐标位置移动到306所示的位置。 After the above calculations, can find the correct position changes of the touch point, the touch coordinates are generated by the movement of the touch point 304, point 304 indicates that the touch has been moved from a coordinate position 306 to the position shown. 正确识别各个触摸点的位置坐标之后,就可以依据各个点的运动趋势,定义各种不同的触摸操作功能。 After correctly identifying positional coordinates of each touch point based on the movement trend can each point to define different touch operation function. 比如,在某个应用场合,两个触摸点反向运动,表示进行放大操作;两个触摸点相向运动,则表示进行缩小操作;而一个触摸点不动,另外一个触摸点作弧线运动,表示进行旋转操作等等。 For example, in some applications, two touch points reverse movement, represents amplifying operation; two touch points move toward each other, then zoom out; and a fixed point touch, a touch point for further movement of the arc, It represents a rotation operation and the like. 这些操作功能可以由相应的应用软件来灵活定义。 These operations may be flexibly defined by the features of the respective application.

本实施例列举的是两个触摸点同时触摸的情形,两个以上的点的触摸操作识别,同样可以依据上面的方法来进行,先区分出各个触摸点,注册并保存位置坐标值,再根据位置坐标值变化情况判断出位置发生变化的触摸点。 The present embodiment is exemplified embodiment two touch points simultaneously touched case, the touch operation to identify two or more points, can also be carried out according to the above method, to distinguish each touch point position coordinate value stored and register, then in accordance with position coordinate value changes in the touch point position determined changes. 在有需要的情况下还可以检测出触摸点的形状大小,根据形状大小来标记并进一步识别各个触摸点。 In the case where there is a need to detect the size and shape may be a touch point, marked according to the size and shape of each touch point further recognition.

本发明的方法适用于各种不同的触摸屏装置,包括其所使用的触摸定位检测技术为基于红外线、摄像头或者其它技术的各种触摸屏,虽然各触摸屏技术在检测触摸输入信息的原理上有所不同,但是本发明的技术理念和方法可应用于各种触摸屏系统,而与触摸屏所釆用的定'位检测技术无关。 The method of the present invention is applicable to a variety of different touch screen device, comprising a touch location detection technique they use to vary based on the infrared camera or other techniques a variety of touch screen, the principle though each touch screen technology input information detected touch , but the technical idea and method of the present invention may be applied to a variety of touch screen system, may be 'regardless of the bit detection techniques preclude the touch screen.

以上所述仅为本发明一个实施例,事实上用到多点触摸的场合远不止本实施例提到的几种;实施例中列举的触摸点只有两个,而依据本发明方法可以实现的触摸点可以是两个或者更多,因此本发明的保护范围并不局限于此,本领域中的技术人员任何基于本发明技术方案上非实质性变更均包括在本发明保护范围之内。 The above embodiment is merely one embodiment of the present invention, the multi-touch actually used far more than several occasions mentioned embodiment of the present embodiment; touch points cited in the examples, only two, and the method according to the invention may be implemented the touch point may be two or more, and therefore the scope of the present invention is not limited thereto, any aspect of the present invention is based on a non-substantive change skilled in the art are included within the scope of the present invention.

Claims (8)

1、一种用于触摸屏系统的多点触摸定位方法,用于判别两个或两个以上的点的同时触摸事件,包括以下步骤: a、测量触摸信号,判断信号变化情况,计算触摸事件发生的位置坐标和/或触摸点的形状大小; b、根据位置坐标数量的变化情况,判断触摸信息是单点触摸还是多点触摸,若为单点触摸,则触摸屏系统相应地执行单点触摸的各项操作,若为多点触摸,则进入步骤c; c、比较本计算周期和上一个计算周期检测到的位置坐标数量的变化和/或坐标数值的变化,判断是否有新的触摸点加入或者有触摸点离开,如果有新的触摸点加入,注册新触摸点信息,记录新触摸点的位置坐标,如果有触摸点离开,则注销已离开的触摸点信息。 1, a method for positioning the multi-touch touch screen system used for determining two or more simultaneous touch points event, comprising the steps of: a, measured touch signal, the change determination signal, calculating touch event occurs position coordinates and / or the shape and size of the touch point; B, according to the position coordinates of the number of changes, whether the touch information is a single-touch or multi-touch, if single-point touch, the touch screen system accordingly perform single-touch the operation, if it is a multi-touch, step C; C variation, comparing the present calculation cycle and the previous calculation cycle of the detected position coordinate changes in the number and / or a coordinate value, it is determined whether a new touch point is added or leave a touch point, if there is a new touch point to join, register a new touch point information, recording position coordinates of the new touch point, if a touch point left, then log out of touch point information has left.
2、 如权利要求1所述的多点触摸定位方法,其特征在于,其进一步包括步骤d:比较本计算周期与上一个计算周期检测到的坐标数值的变化情况, 将坐标值与已经注册的触摸点的当前位置坐标进行比较,判断各触摸点的运动情况。 2. The multi-touch positioning method claimed in claim 1, characterized in that it further comprises a step d: comparing the detected present calculation cycle and the calculation cycle changes a coordinate value, the coordinate values ​​registered comparing the current position coordinates of the touch point, it determines the movement of the respective touch points.
3、 如权利要求2所述的多点触摸定位方法,其特征在于,其进一步包括步骤e:计算并判断出位置发生变化的触摸点,并将最新的坐标值赋予该触摸点。 3. The multi-touch positioning method claimed in claim 2, wherein, further comprising the step e: calculating and determining the position of the touch point is changed, and assigned to the latest touch point coordinate values.
4、 如权利要求l-3中任意一项所述的多点触摸定位方法,其特征在于:所述步骤b中判断触摸信息是单点触摸还是多点触摸的方法为:如果在一段时间内,只有一组位置坐标值,则判断为单点触摸,若在一段时间内, 检测到的位置坐标值有两组或者两组以上,则认为存在多个触摸点。 4, l-3 as claimed in any multi-touch positioning method according to claim, wherein: said touch information determined in step b is a single-touch or multi-touch method: if within a period of time , only one set of position coordinate value, it is determined that the single-touch, if a period of time, the detected position coordinate values ​​of two or more than two, that there is a plurality of the touch points.
5、 如权利要求1〜3中任意一项所述的多点触摸定位方法,其特征在于:在确定触摸点位置坐标的同时,依据触摸点在触摸时引起的在不同坐标方向(X, Y方向)的检测单元数量和/或数值变化规律,检测出触摸点的形状大小,根据形状大小标记并进一步识别不同的触摸点。 5, as claimed in any one of the multi-touch positioning method in claims 1~3, wherein: determining the position coordinates of the touch point while the basis of the touch point caused by touch in different coordinate directions (X, Y direction) of the detection unit number and / or value variation, shape and size of the detected touch point, and to further identify different touch points according to the shape and size marker.
6、 如权利要求3所述的多点触摸定位方法,其特征在于:所述步骤e中计算并判断出位置变化的触摸点的方法包括以下步骤:i、 根据测量信号,计算触摸位置的坐标位置; ii、 计算坐标值与相邻的各个触摸点Tn当前坐标之间的距离A、"2、……"„,iii、 比较计算所得得距离值A, A,……,化,找出最小值A, 确定与化对应的位置发生变化的触摸点&;iv、 用目前计算周期内检测到的位置坐标代替距离值最小的触摸点?;的现有位置坐标。 6. The multi-touch positioning method according to claim 3, wherein: said step e method of calculating and determining the change in position of the touch point comprises the steps of: I, the measurement signals, calculating a touch position coordinates position; the distance a between II, calculates the coordinate values ​​of neighboring points of the respective touch coordinates Tn current, "2, ......" ", iii, comparing the calculated distance value to obtain a, a, ......,, and retrieve minimum value a, the touch point determination changes the position of the corresponding &; iv, the position coordinates of the detected current to the calculation cycle instead of the minimum distance value of the touch point;? a conventional position coordinates.
7、 如权利要求6所述的多点触摸定位方法,其特征在于:所述步骤H中的与坐标值相邻的触摸点r„的判断方法通过釆用检测坐标值变化的范围、检测坐标值变化的速率或者检测坐标值变化的方向趋势的方法来判定。 7. The multi-touch positioning method claimed in claim 6, wherein: said step H adjacent to the touch point coordinate value r "by judging method changing coordinate values ​​preclude the use of the detection range, the detection coordinates the method of rate or change in direction of the trend change detection coordinate value is determined.
8、 如权利要求1-3中任意一项所述的多点触摸定位方法,其特征在于:其所采用的触摸定位检测技术为红外线技术、摄像头技术或者其它技术。 8, a multi-touch as claimed in locating method as claimed in any one of claims, wherein: the touch location detection techniques is their use of infrared technology, camera technology or other technologies.
CN 200710028038 2007-05-16 2007-05-16 Multiple point touch localization method CN100590579C (en)

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