CN101930306A - Multi-touch device and detection method thereof - Google Patents

Multi-touch device and detection method thereof Download PDF

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CN101930306A
CN101930306A CN 200910109665 CN200910109665A CN101930306A CN 101930306 A CN101930306 A CN 101930306A CN 200910109665 CN200910109665 CN 200910109665 CN 200910109665 A CN200910109665 A CN 200910109665A CN 101930306 A CN101930306 A CN 101930306A
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infrared light
touch
infrared
multi
device
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CN 200910109665
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陈伟山
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陈伟山
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Abstract

The invention provides a multi-touch device and a detection method thereof. The device comprises a touch panel, at least three infrared transmitters arranged on at least three corners of the touch panel, and infrared induction devices arranged on at least three edges of the touch panel, wherein an induction edge is formed on each edge of the touch panel with the infrared induction device; and the light transmitted by each infrared transmitter can be induced by two opposite induction edges. The coordinate position of the touch point on the screen can be determined by the cross point formed by light lines from each light source with different gradients in different directions, so that accurate determination on the touch point can be formed to avoid erroneous determination.

Description

一种多点触控装置及检测方法 A multi-touch detecting method and apparatus

技术领域 FIELD

[0001] 本发明涉及触控装置,准确地说是用于多点的触控装置,该装置可实现同时处理多点的控制操作。 [0001] The present invention relates to a touch device, specifically for a multi-touch device, the device allows the simultaneous operation of multiple processing control points.

背景技术 Background technique

[0002] 多点触控技术,是指利用电阻、电容、红外光或红外面激光等方式与计算机系统一起对屏幕的多个(两个以上,不包括两个)触点进行判断,并执行相应指令的一种控制技术,其目地是利用两个以上的触点代替原有的单点触控方式,多点触控不仅能完全取代单点触控,而且具有更好的人性化界面,甚至能做到鼠标和单点触控无法做到的事情。 [0002] The multi-touch technology, is the use of resistive, capacitive, infrared light or red laser or the like outside the system together with the computer to perform a plurality of screens (two or more, excluding two) judgment contacts, and a control command corresponding technique, which is head to use two or more contacts in place of the original single touch manner, multi-touch not only fully substituted single touch, and has a better human interface, even a mouse can do single-touch and can not do.

[0003] 目前,一种红外多点触控装置采用的是FTIR(Frustrated Total InternalReflection),即受抑内全反射技术。 [0003] Currently, An infrared multi-touch device uses FTIR (Frustrated Total InternalReflection), i.e., frustrated total internal reflection technique. 如图1所示,由LED(发光二极管)发出的光束从触摸屏截面照向屏幕的内部并在表层之间产生反射。 As shown, the light beam emitted by the LED (Light Emitting Diode) and a reflection between the surface layer from the touch screen according to the inside cross section of the screen. 如果屏幕表层是空气,当入射光的角度满足一定条件时,光就会在屏幕表面完全反射。 If the screen surface is air, when the angle of incident light satisfy a certain condition, light will be totally reflected on the screen surface. 但是如果有个折射率比较高的物质(例如手指)压住丙烯酸材料面板,屏幕表面全反射的条件就会被打破,部分光束透过表面,投射到手指表面。 However, if there is a relatively high refractive index material (e.g., a finger) acrylic material pressed against the panel, the screen surface of the total reflection conditions will be broken, through the surface portion of the light beam projected onto the surface of the finger. 凹凸不平的手指表面导致光束产生散射(漫反射),散射光形成亮点,透过触摸屏后到达光电传感器,光电传感器将光信号转变为电信号,系统由此获得相应的触摸信息。 It leads to uneven surface of finger light scattering (diffuse reflection), the scattered light forms a bright spot, after reaching the photosensor through the touch screen, the photosensor an optical signal into an electrical signal, the system thereby obtain the corresponding touch information.

[0004] 另一种方式(红外光阻断技术)所采用的光主要是红外光。 [0004] Another way of light (infrared light blocking technique) is used primarily infrared light. 图2所示为该技术一种应用的结构示意图,在该结构中,采用红外光作为入射光,屏幕四边分成对应的两个部分,一部分安装红外发射管,另一部分则设置红外接收管,红外发射管所发射的红外光被对面的红外接收管接收。 Schematic structural diagram of an application for the technique shown in Figure 2, in this configuration, infrared light as the incident light, the screen is divided into two portions corresponding to the four sides, infrared emission part of the mounting, the other part is an infrared receiver, an infrared the emitted infrared light emitting tube is opposite the infrared receiver reception. 当手指触摸到屏幕上时,如A点、B'点,凹凸不平的手指表面导致光束产生散射,形成亮点,通过对亮点的判断从而判断按压的位置,这种方式能够判断单点和不位于同一水平线或垂直线上的触点,但是对于同一水平线或垂直线上的点,例如A点和B 点,B'点和A'点,此时A点和B点,B'点和A'点均有一个坐标是重复的,就会导致无法判断,或者出现误判。 When a finger touches the screen, such as the point A 'point B results in the finger surface irregularities scattering light, bright spots are formed, by determination of the bright spots to determine the position of the pressing, can be determined in this way is not located in a single point and the same horizontal or vertical line of contact, but point to the same horizontal or vertical line, for example, point a and point B, B 'and point a' point where point a and B, B 'and point a' There is one point coordinate is repeated, it will lead not judge, or miscarriage of justice.

[0005] 为此,又提出了一种改进方法,就是利用A点和A'点,B点和B'点不同时触摸的特点,进行时间上的判断,从而避免误判,然而这只对A点和A'点,B点和B'点不同时触摸的时候有效果,如果发生同时触摸的情况,则无法避免误判。 [0005] For this reason, also proposed an improved method, is to use the point A and point A ', B and Point B' are not simultaneously touched point characteristics, the determination of time, so as to avoid false positives, however, only to point a and point a ', B and point B' are not simultaneously touched points when effective, if the case occurs simultaneously touched, can not avoid misjudgment. 且对于两个以上的触控点, 就是三个和三个以上触控点形成的多点触控,上述的方法显然无法实现。 And for two or more touch points, and three multi-touch is the touch point formed by three or more, the above method is clearly not possible.

[0006] 专利申请200810183426. X提出了一种红外线激光多点触控装置,该申请利用激光作为光源,红外激光发射元件发射激光照射手指,产生亮点,摄像机作为红外激光接收元件接收激光,同时在液晶显示屏上安装触控面板作为触发器件,触控面板安装于液晶显示屏上,摄像机安装于液晶显示屏的背面,这样对光线照射手指所产生的亮点能够被准确地判断出。 [0006] Patent Application No. 200810183426. X proposes a multi-touch device for infrared laser, which application is using a laser as a light source, infrared laser emitting element emits laser light irradiating a finger, bright point, as the infrared laser camera receives laser light receiving element, while a touch panel mounted on the LCD as a trigger device, a touch panel mounted on the LCD screen, the camera mounted on the rear of the LCD screen, so that the highlights of the irradiation light generated by the finger can be accurately judged. 该申请的缺点是仍然要对亮点进行判断,必须同时启动设置于液晶显示屏上四个角落的红外激光发射器同时发射,才能准确判断亮点。 The disadvantage of this application is still the highlight of the judge, you must also start an infrared laser emitter on the LCD screen on the four corners of the simultaneous transmission, in order to accurately determine the highlights.

[0007] 因此,人们又提供了另外一种新的判断方式,以避免亮点带来的缺陷,即在屏幕的上部两端设置两个摄像头,下面的两个侧边和底边都安装反光条,通过摄像头对触控点所投射到发光条上的暗条的长短和位置判断发射光的角度,通过两个摄像头所得出角度,来判定触控点的位置,这种方式不是通过亮点进行判断触控点,而是通过投射角度来判断,避免了水平线或垂直线上触控点所形成的误判,但是在同一投射线上的多个点,仍然会存在误判的问题。 [0007] Thus, it also provides a new judgment another way to avoid the drawbacks caused by the highlight, i.e., two cameras disposed on both ends of an upper portion of the screen, the following two sides and bottom are installed Reflective , the touch point of the camera to the projected length of the filament and the location on the light emitting angle of the light emitting section is determined, the angle derived by the two cameras to determine the position of the touch point, this manner is not judged by the highlight touch point, but rather is determined by the projection angle, to avoid the misjudgment formed horizontal or vertical line of the touch point, but a plurality of projection points in the same line, there will still be the problem of false positives.

[0008] 还有一种方式,是通过在每个像素的对应位置设置感应器,如TMD正在利用低温多晶硅(LTPS)技术研发内嵌传感器的光感应式多点触控面板。 [0008] Another way is by setting a corresponding position of each pixel sensor, such as a TMD is using a low temperature polysilicon light sensor (LTPS) technology developed embedded multi-touch sensor panel. 其主要做法是在LTPS-TFT 面板的每个像素中嵌入光传感器,当手指或光笔等触摸屏幕时,会遮挡部分光线,此时通过光传感器,即可感知并测算出触点位置。 The main approach is embedded in each pixel LTPS-TFT panel light sensor, when a finger or a touch screen, light pen, will block some of the light, this time through the light sensor, to sense and measure the contact position. 由于该项技术是通过在液晶面板的像素中内嵌光传感器的方式感测触控点的位置,因此可以同时检测多个触点,实现多点触控的功能,但是这对元器件的要求非常高,而且光传感器对应像素的设置,使得成本很高,特别是在判断很小面积的触控点的时候,就必须以非常小的光传感器为基础设计,因此这种方式是非常昂贵的。 Since the technology is the touch point position sensing, by way of embedded optical sensor of the pixel in the liquid crystal panel, a plurality of contacts can be detected at the same time, the multi-touch function, but it requires components of very high, and the optical sensor disposed corresponding to pixels, so that the cost is high, especially when a small area of ​​the touch point is determined, it must be very small light sensor-based design, so this approach is very expensive .

发明内容 SUMMARY

[0009] 基于此,本发明首要目地是设计一种多点触控装置,该结构简单、成本低廉,便于制作及实现的。 [0009] Based on this, the primary object of the invention is to design a multi-touch device, the structure is simple, low cost, ease of fabrication and implementation.

[0010] 本发明的另一个目地是提供一种多点触控装置,该装置可广泛适用于液晶及其他的触控屏。 [0010] Another object of the present invention is to provide a multi-touch device, the apparatus can be widely applied to liquid crystal and other touch screen.

[0011] 本发明的再一个目地在于提供一种多点触控装置,该装置既能也适用于安装在任意一触控屏上,构成触控结构,且该装置对触控点的判断准确、可靠。 [0011] further an object of the present invention is to provide a multi-touch device, the apparatus is also applicable to both mounted on either a touch screen, touch structure configuration, and the device for determining the touch point is accurately ,reliable.

[0012] 基于此,本发明是这样实现的: [0012] Based on this, the present invention is implemented as follows:

[0013] 一种多点触控装置,其特征在于该装置包括: [0013] A multi-touch device, characterized in that the apparatus comprises:

[0014] 一触控面板, [0014] a touch panel,

[0015] 至少三个红外光线发射器,设置于触控面板的至少三个角,及, [0015] at least three infrared light emitter, disposed on at least three corners of the touch panel, and,

[0016] 至少三个触控面板的边设置有红外光感应器件,每个具有红外光感应器件的触控屏的边形成感应边, [0016] at least three sides of the touch panel, an infrared light sensor devices, each side having a touch screen sensitive to infrared light sensing device side is formed,

[0017] 且每个红外光线发射器,所发射的光线能够被两个相对的感应边所感应。 [0017] and each of the infrared light emitter, the light emitted can be sensed by sensing two opposing edges.

[0018] 红外光照射到红外接收元件后产生感应电流信号,经放大识别处理后送给计算机系统。 [0018] The infrared light to infrared light induced current signal receiving element, after amplification recognition process to the computer system.

[0019] 本发明的思路是:通过多条光线的照射能够确定一个平面上不同的点的坐标,但是光线的照射具有覆盖性,也就是说,一条光线照射时,前面的点会遮挡住后面的点,前面的点把后面的点覆盖住,这样就无法判断后面点的坐标。 [0019] The idea of ​​the invention: the ability to determine the coordinates of a point on a plane different from the plurality of light by irradiation, but the irradiation of light having a coverage, that is, a light irradiation, the foregoing points are obscured behind point, the point in front of the back cover of the point, so can not determine the coordinates of a point behind. 因此,对于多点的判断,必需从三个或三个以上不同的角度照射,排除遮挡的光线,才能通过光线判断触控点,也就是说多条不同斜率的直线相交可确定多个不同的触摸点。 Thus, for multi-point determination, required from three or more different illumination angles, to exclude the light barrier, in order to determine the touch point of the light passing through, that is to say a plurality of intersecting straight lines of different slopes may determine a plurality of different touch points. 通过这个原理,本发明改变了对触控点的判断方式,将原来通过垂直和正交的两个方向的直线相交改变为由多个方向、多种斜率的直线相交检测触摸点。 By this principle, the present invention changes the way of determining the touch point, and the original vertical line through the two orthogonal directions intersecting a plurality of directions by changing the linear slope of the plurality of touch points detected intersection. 来自3个或4个角落或更多位置的红外光源的光线与其对边的每个红外接收元件构成直线,多个触控点对光线产生遮挡,使相应的接收元件没有感应电流,由其确定被阻断的光路直线。 Infrared light from the light source 3 or 4 position of its corners or more linearly constituting the infrared receiving element for each side, a plurality of touch points to produce light shield, the corresponding elements are not receiving an induced current is determined by straight light path is blocked. 通过这些被阻断的来自每个光源的、不同斜率、不同方向的光路直线构成的交叉点来判断触控点的在屏幕上的坐标位置。 These blocked, different slopes, the optical path from the straight line intersection configuration of each light source in different directions to determine the coordinate position of the touch point on the screen. 光源的个数越多,构成的光路直线的角度区别越大,正确确定触摸点的个数就愈多。 The more the number of light sources, the larger the angle of the optical path difference between the linear configuration, determining the number of touch points to the more correct. 这样就能够形成对触控点的准确判断, 避免误判。 This makes it possible to accurately determine the touch point is formed, to avoid misjudgment. 因此,该装置可以对多点触控进行准确地判断。 Thus, the apparatus can accurately determine the multi-touch.

[0020] 所述的红外光线发射器,可以是红外LED,或者红外激光等元件所构成的发射器, 红外LED或红外激光元件所发出的光通过光学镜片,使光线在屏幕表面形成一个均勻的扇面,能均勻地照射到红外光感应器件上。 [0020] The infrared light emitter may be a light through an optical lens, so that the light screen surface to form a uniform emitter, an infrared LED or an infrared LED element infrared laser, or an infrared laser element consisting of the emitted fan can be uniformly irradiated to the infrared light sensing device.

[0021] 所述触控面板,其为触摸屏、透明平面体,或者可以进行平面显示的显示屏中的任意一种;在无防挂花显示屏使用时,触控面板可以包含一块透明的平面物体,以实现对无防刮花显示屏的保护。 [0021] The touch panel, a touch screen, transparent planar member, or may be any of a flat display in the display screen; wounded in action in the absence of anti-used display, the touch panel may comprise a transparent plane objects in order to achieve the protection of scratch-free display. 在本发明所采用的触控面板中,并不需要特定限制于触摸屏,其可以是触摸屏,显示器,或者是安装于显示器上的保护层,都能够实现触控点的判断。 In the touch panel of the present invention is employed, need not particularly limited to a touch screen, which may be a touch screen, display, or attached to the protective layer on the display, are able to achieve the touch point determination.

[0022] 所述红外光感应器件,其是一个以上红外光感应件的组合,就是说,该红外光感应器件包含有一个以上的红外光感应件,且上述红外光感应件呈并联的结构形式,当光线照射于红外光感应件时,被照射的红外光感应件产生感应电流信号,没有被光线照射的光感应件则不产生感应电流信号,形成无感应信号区域,这些电流信号经处理后得到的阻断状态信号被送往计算机处理。 [0022] The infrared light sensor devices, sensitive to infrared light which is a combination of more than one member, that is, the infrared light sensor device comprises one or more infrared light sensing element, and said infrared light sensor element as a parallel structure when light is irradiated to the infrared light sensor element, is irradiated with infrared light sensing element induced current signal, not the photosensitive member to light induced current signal is not generated, no sensing signal region is formed, the current signal processed blocking state resulting signal is sent to computer processing.

[0023] 上述红外光感应件,其为感光二极管、红外接收二极管,或者类似的光感元件。 [0023] The infrared light sensor element, which is a photodiode, infrared receiver diode or similar light sensing device. 而且,红外光感应元件,可以按照触控屏的实际(大小、比例的)需求,进行选材和排列,以能够形成对有效触控点的判断。 Furthermore, infrared light sensing element, according to the actual touch screen (size ratio) needs, selection and arrangement, effective to be able to form a judgment on the touch point. 例如,对20英寸的触控屏,可采用单边设置100-200个光感应件的方式,设置对应的触控点判断方式。 For example, a 20 inch touch screen, can be provided unilateral 100-200 manner photosensitive member, disposed corresponding to touch point determination method.

[0024] 上述的红外感应件,具有一定的接收感应角度和朝向,为使其更正确地接收到红外光源发出的光信号,其排列朝向为一个适合(即,使红外光线发射器能够均勻照射至少一个感应边上的所有红外感应件)的角度。 [0024] The infrared sensing member, having received a certain angle and orientation sensor, such that it more properly received optical signal emitted from the infrared light source, which is arranged in a suitable orientation (i.e., so that the infrared light emitter is irradiated uniformly at least one infrared sensing element of all the edge) of the angle sensor. 通常情况下,一个感应边上的所有红外光感应件,其按照相同的方向和角度进行排列,对应于红外光线发射器,并并联于一起。 Typically, a sensor element sensitive to infrared light to all sides, which is carried out in the same direction and arranged at an angle corresponding to the infrared light emitter, and together in parallel.

[0025] 为了使上述红外感应件能不受干扰地工作,每个感应边上的所有红外光感应件都设置于一固定框内,红外光感应件所产生的电流信号通过检测电路对外输出。 [0025] In order to make the infrared sensor element can work without disturbance, all of the infrared light sensor sensing the edge of each element are disposed on a stationary frame, a current signal generated by the infrared light sensor element through the external output of the detection circuit.

[0026] 所述的红外光线发射器,最好设置四个,设置于触控面板的四个角,每个红外光线发射器发出的光线对应两条感应边,由此,每个触控点都存在四根交叉光线,也就是说,只有存在四个光源射线交叉点时,才会认为触控点是真实存在的,否则不是,这样能够准确判断触控点,不会产生误判。 [0026] The infrared light emitter, preferably four disposed, is provided in the four corners of the touch panel, each of the infrared rays emitted from the light emitter corresponding to the two sides of sensing, whereby each touch point there are four cross-rays, that is, only when the presence of four light ray intersection point, the touch point will be considered to be real, or not, this can accurately determine the touch point, will not produce false positives.

[0027] 所述的红外光线发射器,每个都对应照射两个感应边,所以,四个红外光线发射器同时启动时,每条感应边都有两个红外光线发射器进行照射,由于光线照射的角度不同,势必会导致红外光感应器件上所以的红外光感应件都会被照射到,因此,红外光线发射器需要依次启动,在每个扫描周期内,每个红外光线发射器被启动一次,这样可以准确判别每个红外光线发射器照射的结果,并且减少了功耗。 [0027] The infrared light emitter, each corresponding illuminated sensing two sides, so that, when the infrared light emitter four started simultaneously, each inductor has two sides is irradiated infrared light emitter, since the light different illumination angles, will inevitably lead to the induction device so that the infrared light to infrared light is irradiated to the member are, therefore, the infrared light emitter needs to start up, in each scanning cycle, each of the infrared light emitter is activated once , so that the results can be accurately determined illumination of each infrared light emitter, and power consumption is reduced.

[0028] 考虑到效率的因素,可以对红外光线发射器进行优化启动,就是说,可以同时启动对角线上的两个红外光线发射器,同时对四个感应边上的红外光线感应件的感应情况进行判断。 [0028] Taking into account the efficiency factor can be optimized start infrared light emitter, that can be started on the two infrared light emitter while the diagonal, while the four infrared light sensor sensing the edge of the member sensing to judge the situation.

[0029] 在依次启动,或者优化启动红外光线发射器的情况下,还可以增加红外光线发射器的设置,以更好地判断多个触控点同时存在的情况。 [0029] In the case of sequence start, or to optimize activate the infrared light emitter may also be provided to increase the infrared light emitter to better determine a plurality of touch points simultaneously. 此时,增加的红外光线发射器虽然设置于感应边的一侧,但是依靠光线与投射的位置关系,依然可以判断触控点的位置。 In this case, the increased although the infrared light emitter disposed on one side edge of the sensor, but thanks to the positional relationship between the projection of the light can still determine the location of touch point.

[0030] 每个红外光线发射器在被启动时,均被进行红外光的高频调制。 [0030] In each of the infrared light emitter when activated, are high-frequency modulated infrared light. 接收端的红外光线感应器件产生的感应电流信号被送往一个高频谐振电路,只有当感应电流信号的频率与高频谐振电路谐振频率一致时,光感应电流信号才被检测接收,经过检波判决后,感应状态信号被送往计算机系统,这样有利于避免干扰,准确判断触控点。 Induced current signal receiving terminal device generates infrared light sensor is sent to an HF resonant circuit, only when the frequency coincides with the resonance frequency of the HF resonant circuit an induced current signal, the optical sensing current received signal was only detected after the detection decision , sensing status signal is sent to the computer system, which helps to avoid interference and accurately determine the touch point.

[0031] 每个触控点对每个红外光源的遮挡都形成一个具有一定角度的扇形区域,这些扇形区域的交集的中心,判为触摸点中心坐标。 [0031] Each touch point for each shield an infrared light source is formed a fan-shaped area having a certain angle of intersection of the central sector area, the center coordinates of the touch point is judged.

[0032] 对于特殊情况下出现的模糊触摸点,可以按动态计算进行排除或确认。 [0032] For the fuzzy touch point occurs under special circumstances, can be confirmed or excluded by dynamically calculated.

[0033] 一种多点触控的检测装置,该装置包括: [0033] A multi-touch detection apparatus comprising:

[0034] 一触控面板; [0034] a touch panel;

[0035] 至少三个红外光线发射器,设置于触控面板的至少三个角;及 [0035] at least three infrared light emitter, disposed on at least three corners of the touch panel; and

[0036] 至少三个触控屏的边设置有红外光感应器件,每个具有红外光感应器件的触控屏的边形成感应边,且每个红外光线发射器,所发射的光线能够被两个相对的感应边所感应; [0036] at least three sides is provided with a touch screen device sensitive to infrared light, each side having a touch screen sensitive to infrared light sensing device side is formed, and each of the infrared light emitter, the emitted light can be two opposite sides of a sensing sensed;

[0037] —驱动电路,驱动电路连接于红外光线发射器,对红外光线发射器的光线发射进行控制; [0037] - a drive circuit, the drive circuit is connected to the infrared light emitter, the light emitter of infrared light emission control;

[0038] 一检测电路,该电路连接于红外光感应器件,对红外光感应器件被光照射时所产生的感应电流进行判断,并输出到处理器; [0038] a detecting circuit which is connected to a device sensitive to infrared light, infrared light induced current sensing device is irradiated with light generated by the judgment, and outputs to the processor;

[0039] 一处理器,其将感应电流进行判断,计算触控点的位置,并根据触控点的位置执行相应的指令。 [0039] a processor, which determines the induced current, the position of the touch point is calculated, and the instruction execution in accordance with the corresponding position of the touch point.

[0040] 所述触控面板,至少包括一显示屏。 The [0040] a touch panel, comprising at least a display screen. 更进一步,该触控面板,其是触摸屏、覆盖有透明平面体的显示屏的任意一种。 Still further, the touch panel, a touch screen which is covered with a transparent planar member of any one of the display screen.

[0041] 所述的红外光线发射器,可以是红外LED,或者红外激光元件所构成的发射器;所述的红外光线发射器,最好设置四个,设置于触控面板的四个角,每个红外光线发射器发出的光线对应两条感应边。 [0041] The infrared light emitter, the LED may be an infrared transmitter, or an infrared laser element consisting of; the infrared light emitter, preferably four disposed, is provided in the four corners of the touch panel, each of the infrared rays emitted from the light emitter corresponding to the two sides of the induction.

[0042] 所述红外光感应器件,其是一个以上红外光感应件的组合,就是说,该红外光感应器件包含有一个以上的红外光感应件,且上述红外光感应件并联于处理器上;上述的红外感应件,具有一定的接收感应角度和朝向,为使其更正确地接收到红外光源发出的光信号, 其排列朝向为一个适合的角度。 [0042] The infrared sensor device, which is a combination of more than one element sensitive to infrared light, that is, the infrared light sensor device comprises one or more infrared light sensing element, and said infrared light sensor element in parallel on a processor ; said infrared sensing member, having received a certain angle and orientation sensor, such that it more properly received optical signal emitted from the infrared light source, which is arranged toward a suitable angle.

[0043] 为了使上述红外感应件能不受干扰地工作,每个感应边上的所有红外光感应件都设置于一固定框内,红外光感应件所产生的电流信号通过检测电路对外输出;在允许的情况下,所述检测电路也可以集成于该固定框内。 [0043] In order to make the infrared sensor element can work without disturbance, all of the infrared light sensor sensing the edge of each element are disposed on a stationary frame, a current signal generated by the infrared light sensor element through the external output of the detection circuit; where permitted, the detection circuit may also be integrated in the fixed frame.

[0044] 一种多点触控的检测方法,其包括下述步骤: [0044] The multi-touch detection method, comprising the steps of:

[0045] 1、启动红外光线发射器,进行扫描; [0045] 1, the infrared light emitter starts to be scanned;

[0046] 2、红外光线感应器件接收红外光的照射,并产生感应电流信号; [0046] 2, the infrared light sensor receives infrared light irradiation device, and generates an induced current signal;

[0047] 3、检测上述感应电流信号,并判断是否被遮挡; [0047] 3, the induced current signal is detected, and if it is being blocked;

[0048] 4、计算无感应电流信号产生的红外光感应器件处的无感应信号区域及该区域与对应红外光线发射器所形成的扇形区域; [0048] 4, no sector area sensing device sensitive to infrared light signal area at the non-inductive current signal is calculated and the region corresponding to the infrared light emitter is formed;

[0049] 5、综合计算至少三个感应边的无感应电流信号产生的红外光感应器件处的无感应信号区域及该区域与对应红外光线发射器所形成的扇形区域,判断所述扇形区域的交集,并以该交集的中心点作为触控点。 [0049] 5, the integrated induced current signal is calculated without the at least three sides of the sensing signal generated by non-sensing region of the infrared light sensing device at the sector and the region corresponding to the infrared light emitter region formed, determining the sector region intersection, and the intersection of the center point as a touch point.

[0050] 所述的检测方法,在步骤1中,需要依次启动红外光线发射器,以产生无感应信号区域和扇形区域。 Detection method [0050], wherein in step 1, in turn initiates the infrared light emitter to generate a sensing signal region and the non-sector area.

[0051] 所述的检测方法,在步骤1中,可以优化启动红外光线发射器,即,同时启动对角线上对应的两个红外光线发射器,扫描结束,对应的红外光线感应器件产生感应电流信号后,再启动其余的红外光线发射器进行扫描。 Detection method [0051], wherein in step 1, may be optimized activate the infrared light emitter, i.e., simultaneously starts the corresponding two diagonally infrared light emitter, scanning, corresponding to the infrared light sensor means to generate an induced after the current signal, and then start the remainder of the infrared light emitter for scanning.

[0052] 所述的步骤2中,顺序接通被驱动红外光线发射器照射到的2个感应边的红外光线感应器件,以顺序产生感应电流信号,从而形成对无感应信号区域的计算和判断。 [0052] In the step 2, is sequentially turned drives the infrared light emitter is irradiated to the two sides of the infrared light sensor sensing device, a current signal induced in order to form a non-calculation region, and the detection signal is determined .

[0053] 所述的红外光线发射器件,其红外光经高频调制后,再向外发射。 [0053] The infrared light emitting device, after which high-frequency modulation of infrared light, re-emitted outward.

[0054] 总之,本发明改变了原有的触控点判断方式,利用新的触控点的判断方式设计了一个基本的触控点判断装置,并应用到检测装置上,这样能够准确地进行多点触控的判断, 且结构简单、易于实现,可广泛应用于各种显示设备上,特别是液晶、背投等显示器上。 [0054] In summary, the present invention changes the original touch point determination mode, judgment mode using the new touch point a basic design touch point determination apparatus, and applied to the detection means can be accurately performed so that Analyzing multi-touch, and the structure is simple, easy to implement, can be widely used in devices, in particular LCD, displays various rear projection display.

[0055] 且本发明的结构,可以将触控装置制作得较小,能够适用多种尺寸触控屏的设置, 避免了以前的触控屏只能设置于20英寸以上尺寸的局限。 [0055] and the structure of the present invention, the touch device may be made smaller, it can be sized for a variety of touch screen, touch screen avoid the previous limitations can be set only in the size of 20 inches or more.

附图说明 BRIEF DESCRIPTION

[0056] 图1为现有技术实施的原理图, [0056] FIG. 1 is a schematic diagram of the prior art embodiment,

[0057] 图2为现有技术实施的结构示意图, [0057] FIG. 2 is a schematic structural diagram of the prior art embodiment,

[0058] 图3为本发明多点触控装置实施方式一的结构示意图, [0058] FIG. 3 is a schematic structural diagram of the multi-touch device embodiment of the invention,

[0059] 图4为图3所示实施方式触控点的判断效果图, [0059] FIG. 4 is a view of the embodiment of the touch point determination results shown in FIG. 3,

[0060] 图5为本发明多点触控装置实施方式二的结构示意图; [0060] FIG. 5 is a schematic structural diagram of a multi-touch device of Embodiment 2 of the present invention;

[0061] 图6为本发明检测装置的一种实施方式结构示意图。 [0061] FIG. 6 is a schematic structural diagram of an embodiment of the invention, the detection means.

具体实施方式 Detailed ways

[0062] 下面结合附图所示,对本发明的实施做详细说明。 [0062] shown below with the accompanying drawings, embodiments of the present invention are described in detail.

[0063] 图3所示,为多点触控装置的一种结构方式,在该结构方式中出于描述的需要,仅仅对触摸屏、红外光发射器、感应边、红外接收元件进行描述,处理器、检测电路、驱动电路及控制电路通过现有的电路即可实现,并不需要做特别设定,故在图中不予以描述。 [0063] As shown in FIG. 3, a configuration of the multi-touch device of embodiment, in the configuration required for the described embodiment, only the touch panel, an infrared light emitter, sensor side, the infrared receiving element is described, the process , a detection circuit, a driving circuit and a control circuit can be realized by a conventional circuit, in particular, it does not need to be set, and therefore not be described in FIG. 其中, 触摸屏10作为触控面板,当显示设备没有防刮花措施时,触摸屏10上部可覆盖有一透明平面体进行保护,触摸屏10也可以安装在任何显示屏幕上的。 Wherein the touch panel 10 as a touch panel, when the display device does not measure scratch, the touch screen 10 may be covered with an upper portion of a protective transparent planar body, the touch screen 10 may be mounted on any of the display screen.

[0064] 触摸屏10的四个角安装有四个红外光发射器(简称红外光源)11,红外光发射器11倾斜设置,以能够使光线14照射到红外接收元件12所构成的感应边15上;红外发射元件沿屏幕表面发出覆盖整个屏幕的扇面光线。 [0064] The four corners of the touch panel 10 is attached to four infrared light emitters (the infrared light source) 11, an infrared light emitter 11 inclined, to enable the light 14 is irradiated on the infrared receiving sensing member 12 constituting the edges 15 ; IR emitting element along the surface of the screen emit light from the entire fan cover screen. 并且光线14被光源对面2个感应边15的红外接收元件12接收。 And the light source 14 is two opposite sides of the infrared receiving sensor 15 receiving element 12.

[0065] 感应边15所构成的内部区域,为触控区域13。 [0065] The sensing edge 15 inside the region, a touch region 13. 触控点发生在该触控区域13才有效。 The touch point occurs at the touch region 13 is valid.

[0066] 其中,红外光发射器11沿着屏幕表面发射扇形光线14,覆盖整个屏幕。 [0066] wherein, an infrared light emitter 11 emits a fan beam 14 along the surface of the screen fill the screen.

[0067] 红外接收元件12作为光感应器件,对光线14的照射做出反应,具体地说,光线14照射到红外接收元件12使其产生感应电流,被遮挡而没有接收红外光线14的红外接收元件12没有产生感应电流红外接收元件12具有多个,排列于一起形成感应边15,红外接收元件12并联于处理器上(图中未示)。 [0067] IR receiving element as a light sensing device 12, 14 respond to light irradiation, in particular, light 14 is irradiated to the infrared receiving element 12 to produce an induced current is blocked and does not receive the infrared light of the infrared receiver 14 member 12 does not generate an induced current having a plurality of infrared receiving elements 12, 15 are arranged to form an inductive side, the infrared receiving element 12 in parallel on a processor (not shown) together. 通过每条边15中被遮挡没有感应电流的红外接收元件12与红外光发射器11 (光源)之间连线构成多条不同斜率的直线,形成多个不同角度的扇形区域,计算源自4个红外光发射器11的扇形区域交集,及交集区域的几何中心,准确确定触控点的位置,如图4所示的a、b、c、d点。 IR receiving element 15 through each side of the induction current is not blocked 12 11 between the infrared light emitter (light source) and a plurality of straight lines constituting the connection of different slopes, forming a plurality of fan-shaped regions of different angles, calculated from 4 infrared light emitter region 11 of the fan-shaped intersection, and the intersection of the geometric center region, to accurately determine the position of the touch point, as shown in a, b, c, d shown in point.

[0068] 红外接收元件12采用红外接收二极管,两个红外接收二极管的管脚连接于一起形成一个感应部件,连接于处理器上。 [0068] IR receiving element 12 receives the infrared diodes, infrared receiver two pin diodes are connected together to form a sensing member connected to the processor.

[0069] 红外光发射器11在发射光线时,并不是同时发射,而是采用依次被驱动,每个被驱动的发射都形成一个覆盖整个屏幕的扇面区域,并且检测发射源11相对的两个感应边15红外接收元件12的感应状态。 [0069] The infrared light emitter 11 emits light when not transmitted simultaneously, instead of using driven sequentially, each driven transmission sector is formed to cover a whole area of ​​the screen, and detects the radiation source 11 with respect to the two receiving infrared sensing element side 15 of the sensor 12 state.

[0070] 图5是本发明另一个实施方式,在该方式中,采用三个红外发生器21,分别设置于触控屏20上边的两个角和左下边的角,形成三角形的照射关系,其余结构的设置,如感应边25、触控区域23和触控屏20都与图3所示方式一样,该方式中光感应器件仍为红外接收元件22的组合,红外接收元件22排列于一起,感应红外光线24的照射,在该实施中可以判断6点及6点以下多点触控的情况。 [0070] FIG. 5 is another embodiment of the invention, in this embodiment, the use of three infrared generator 21, and are disposed in two corners of the lower left corner of the touch screen 20 the upper side, forming a triangular relationship between the irradiation, set the rest of the structure, inductive edge 25, and the touch area 23 are the same with the touch screen 20 shown in FIG. 3, this embodiment is still combined infrared light receiving element 22 of the sensor devices, to the infrared receiving element 22 are arranged together , the infrared light sensor 24 is irradiated in this embodiment may judge the situation 6:00 and 6:00 the following multi-touch.

[0071] 图6所示,为图3所示方式应用于检测装置时的结构示意图,从图中可以看出,在图3所示结构的基础上,增加计算机16、固定框17、驱动电路(图中未示)和检测电路(图中未示)即可实现检测装置。 As shown in [0071] FIG. 6, a schematic structural view of the detection means is applied to the embodiment shown in Figure 3, it can be seen from the figure, in the configuration of FIG. 3, the computer 16 increases, the fixed frame 17, the driving circuit (not shown) and a detection circuit (not shown) to achieve the detection means.

[0072] 驱动电路,通常和红外光发射器11设置于一起,故在图中未进行标识;同样,检测电路在制作时,通常和红外接收元件12 —起设置于固定框内,也未进行标识。 [0072] The driving circuits, usually an infrared light emitter 11 is provided with, it is not identified in the figure; the same, in the production of a detection circuit, and the infrared receiving element usually 12-- from the fixed frame provided, nor for identity.

[0073] 在该检测装置中,通过I/O接口控制电路,用于控制检测电路对红外接收元件感应电流信号的接收,红外感应状态信号的读取,及红外光线发射器件的驱动触发。 [0073] In the detection device, the I / O interface control circuit for controlling the drive reads the reception detecting circuit, the state of the infrared sensor element receiving infrared signals induced current signal, and the infrared light emitting device is triggered.

[0074] 检测过程为: [0074] The procedure involves:

[0075] 通过检测在触摸屏表面一个或多个触摸的手指或物体遮挡红外光线的情况,并通过计算确定触摸手指或物体所处的位置。 [0075] detected by a touch screen surface or a finger or an object touches blocking infrared light, and determine a position touched by a finger or object is located by computing. 每隔一个扫描周期就检测计算一次。 Every scanning period is detected once.

[0076] 在一个扫描周期内的的方法: [0076] In the method of one scanning cycle:

[0077] 依次驱动四个红外光发射器11 ; [0077] sequentially driving the four infrared light emitter 11;

[0078] 顺序接通被驱动红外光发射器照射到的2个对边的红外接收元件12 ; [0078] switched on sequentially irradiated with the infrared light emitter to drive the two sides of the infrared receiving element 12;

[0079] 检测被接通的红外接收元件12的感应电流,检测电路将感应电路信号放大,调谐、检测,判断红外感应电流信号放大判决是否被遮挡,并记录判断结果; Induced current [0079] receiving the infrared detecting element 12 is turned on, the signal sensing circuit detecting circuit amplifying, tuning, detection and determination of a current signal amplifying judgment infrared sensor being blocked, the result is determined and recorded;

[0080] 计算无感应电流信号产生的红外光感应器件处的无感应信号区域,及该区域与对应红外光线发射器所形成的扇形区域; No signal sensing device sensitive to infrared light region at a [0080] calculation of non-inductive current signal, and the sector area corresponding to the infrared region and the light emitter is formed;

[0081] 由四个红外光发射器11照射所产生的扇形区域交汇形成交集,交集的几何中心点判为触摸点; [0081] The four sector area illuminated by the infrared light generated by the transmitter 11 forming the intersection the intersection, the intersection of the geometric center of the touch point determination;

[0082] 触摸点运动检测作为辅助判决方法,以确定或排除模糊伪触点。 [0082] The motion detection touch point as an auxiliary decision method to determine the pseudo-contact or exclude blurred.

[0083] 触摸点坐标被实时传送给计算机16 (即处理器),以执行指令。 [0083] The touch point coordinates are transmitted to the computer 16 in real time (i.e. a processor), to execute instructions.

[0084] 判断结束后,转而进行下一个扫描周期。 After the [0084] determination, a shift to the next scan cycle.

[0085] 由此,可形成在多点触控的情况下,对触控点的准确判断,避免触控点的误判,有利于各种显示设备实现多点触控,特别适用于液晶和背投显示屏。 [0085] Thus, the case can be formed in the multi-touch, an accurate determination of the touch point, the touch point to avoid misjudgment, facilitate various multi-touch display apparatus, and particularly to a liquid crystal rear projection screen.

[0086] 以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精 [0086] The foregoing is only preferred embodiments of the present invention but are not intended to limit the present invention, where the present invention is in fine

神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 Any modifications within the spirit and principle, equivalent replacements, improvements, etc., should be included within the scope of the present invention.

Claims (10)

  1. 一种多点触控装置,其特征在于该装置包括:一触控面板,至少三个红外光线发射器,设置于触控面板的至少三个角,及,至少三个触控面板的边设置有红外光感应器件,每个具有红外光感应器件的触控屏的边形成感应边,且每个红外光线发射器,所发射的光线能够被两个相对的感应边所感应。 A multi-touch device, characterized in that the apparatus comprising: a touch panel, the at least three infrared light emitter arranged at least three corners of the touch panel, and, at least three sides of the touch panel infrared light sensing device, each side of the touch screen sensitive to infrared light sensing device side is formed, and each of the infrared light emitter, the emitted light can be two opposing sides of the inductive sensor. 红外光照射到红外接收元件后产生感应电流信号,经放大识别处理后送给计算机系统。 Infrared light to infrared light induced current signal receiving element, after amplification recognition process to the computer system.
  2. 2.如权利要求1所述的多点触控装置,其特征在于所述触控面板,其为触摸屏、透明平面体,或者可以进行平面显示的显示屏中的任意一种。 The multi-touch device as claimed in claim 1, wherein said touch panel, a touch screen, transparent planar member, or may be any of a flat display in the display screen.
  3. 3.如权利要求1所述的多点触控装置,其特征在于所述红外光感应器件,其是一个以上红外光感应件的组合,且上述红外光感应件呈并联的结构形式。 Multi-touch device according to claim 1, wherein said infrared sensing device, which is a combination of one or more infrared light sensing element, and said infrared light sensor element as a parallel structure.
  4. 4.如权利要求3所述的多点触控装置,其特征在于上述的红外感应件,具有一定的接收感应角度和朝向,且一个感应边上的所有红外光感应件,其按照相同的方向和角度进行排列,对应于红外光线发射器,并并联于一起。 4. The multi-touch device according to claim 3, wherein said infrared sensing member, having a certain angle and towards the receiving sensor, and a sensing element sensitive to infrared light to all sides, which is in the same direction angle and are arranged corresponding to the infrared light emitter, and together in parallel.
  5. 5. 一种多点触控的检测装置,该装置包括: 一触控面板;至少三个红外光线发射器,设置于触控面板的至少三个角;及至少三个触控屏的边设置有红外光感应器件,每个具有红外光感应器件的触控屏的边形成感应边,且每个红外光线发射器,所发射的光线能够被两个相对的感应边所感应; 一驱动电路,驱动电路连接于红外光线发射器,对红外光线发射器的光线发射进行控制;一检测电路,该电路连接于红外光感应器件,对红外光感应器件被光照射时所产生的感应电流进行判断,并输出到处理器;一处理器,其将感应电流进行判断,计算触控点的位置,并根据触控点的位置执行相应的指令。 A multi-touch detection apparatus comprising: a touch panel; at least three infrared light emitter arranged at least three corners of the touch panel; and at least three sides of the touch screen an infrared light sensor devices, each side having a touch screen sensitive to infrared light sensing device side is formed, and each of the infrared light emitter, the emitted light can be two opposing sides of the inductive sensor; a driving circuit, the drive circuit is connected to the infrared light emitter, emitting light rays of infrared light emitter is controlled; a detection circuit which is connected to the infrared light sensor device, the induced current when the infrared light sensor device is irradiated with light generated by the judgment, and outputs to the processor; a processor, which determines the induced current, the position of the touch point is calculated, and the instruction execution in accordance with the corresponding position of the touch point.
  6. 6.如权利要求5所述的多点触控的检测装置,其特征在于所述触控面板,其是触摸屏、 覆盖有透明平面体的显示屏的任意一种。 The multi-touch detecting device according to claim 6, wherein the touch panel is a touch screen, any one of a display screen covered with a transparent planar body.
  7. 7.如权利要求5所述的多点触控的检测装置,其特征在于所述红外光感应器件,其是一个以上红外光感应件的组合,上述红外光感应件并联于处理器上;且上述的红外感应件, 具有一定的接收感应角度和朝向,为使其更正确地接收到红外光源发出的光信号,其排列朝向为一个适合的角度。 7. The multi-touch detection apparatus according to claim 5, wherein said infrared sensing device, which is a combination of more than one element sensitive to infrared light, the infrared light sensor element in parallel on a processor; and infrared sensing member described above, receiving a certain angle and orientation sensing, to make it correctly receives the optical signal emitted from the infrared light source, which is arranged toward a suitable angle.
  8. 8.如权利要求5所述的多点触控的检测装置,其特征在于每个感应边上的所有红外光感应件都设置于一固定框内,红外光感应件所产生的电流信号通过检测电路对外输出;所述检测电路也集成于该固定框内。 8. The multi-touch detection apparatus according to claim 5, characterized in that the element sensitive to infrared light all sides of each sensor are disposed in a fixed current signal frame, is sensitive to infrared light generated by the detection element an external output circuit; said detection circuit is also integrated on the fixing frame.
  9. 9. 一种多点触控的检测方法,其特征在于该方法包括下述步骤:1)、启动红外光线发射器,进行扫描;2)、红外光线感应器件接收红外光的照射,并产生感应电流信号;3)、检测上述感应电流信号,并判断是否被遮挡;4)、计算无感应电流信号产生的红外光感应器件处的无感应信号区域及该区域与对应红外光线发射器所形成的扇形区域;5)、综合计算至少三个感应边的无感应电流信号产生的红外光感应器件处的无感应信号区域及该区域与对应红外光线发射器所形成的扇形区域,判断所述扇形区域的交集,并以该交集的中心点作为触控点。 9. A method of detecting multi-touch, characterized in that the method comprises the following steps: 1), activate the infrared light emitter, scanning; 2), irradiating infrared light sensor device receives infrared light, and generates an induced current signal; 3), detecting the induced current signal, and determines whether or not occluded; 4), no detection signal region of the infrared light sensing device at the calculated non-inductive current signal and the region is formed corresponding to the infrared light emitter sector area; 5), no comprehensive calculation sensing device sensitive to infrared light signal area at least three non-inductive current signal generated by the sensor and the edge of the sector region corresponding to the infrared light emitter region is formed, determining the sector area intersection, and the intersection of the center point as a touch point.
  10. 10.如权利要求9所述的多点触控的检测方法,其特征在于在步骤1)中,需要依次启动红外光线发射器,以产生无感应信号区域和扇形区域;且所述的红外光线发射器件,其红外光经高频调制后,再向外发射。 10. The multi-touch detection method according to claim 9, wherein in step 1), it is necessary to start up the infrared light emitter to generate a sensing signal area and a non-segment region; and said infrared light emitting device, after which high-frequency modulation of infrared light, re-emitted outward.
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CN101930322A (en) * 2010-03-26 2010-12-29 陈伟山 Identification method capable of simultaneously identifying a plurality of contacts of touch screen
CN102063206A (en) * 2010-12-31 2011-05-18 陈蕾 Photoelectronic input device
CN102169394A (en) * 2011-02-03 2011-08-31 香港应用科技研究院有限公司 Multiple-input touch panel and method for gesture recognition
CN102169394B (en) 2011-02-03 2013-05-08 香港应用科技研究院有限公司 Multiple-input touch panel and method for gesture recognition
CN102655561B (en) * 2011-03-01 2015-09-02 夏普株式会社 Operation instruction means and the image forming apparatus is provided with its
CN102655561A (en) * 2011-03-01 2012-09-05 夏普株式会社 Operation instructing device, image forming apparatus including the same and operation instructing method
CN102799338A (en) * 2011-05-24 2012-11-28 鸿富锦精密工业(深圳)有限公司 Method and system for controlling screen of electronic device
CN102799338B (en) * 2011-05-24 2016-06-15 罗普特(厦门)科技集团有限公司 Electronic device control method and system screen
CN102750047A (en) * 2012-06-05 2012-10-24 北京理工大学 Infrared touch screen positioning method based on optical fibers
CN102722294A (en) * 2012-06-05 2012-10-10 北京理工大学 Method using sector light sources for touch screen positioning
CN102722293B (en) * 2012-06-05 2014-12-31 北京理工大学 High-resolution-ratio infrared touch screen
CN102750047B (en) * 2012-06-05 2015-01-21 北京理工大学 Infrared touch screen positioning method based on optical fibers
CN102722293A (en) * 2012-06-05 2012-10-10 北京理工大学 High-resolution-ratio infrared touch screen
CN103677441B (en) * 2012-09-18 2017-02-08 北京汇冠新技术股份有限公司 Infrared multi-point identification method, infrared multi-point recognition device and an infrared touchscreen
CN103677441A (en) * 2012-09-18 2014-03-26 北京汇冠新技术股份有限公司 Infrared multipoint identification method, infrared multipoint identification device and infrared touch screen
WO2014044180A1 (en) * 2012-09-18 2014-03-27 北京汇冠新技术股份有限公司 Infrared multipoint identification method, infrared multipoint identification device and infrared touchscreen
CN103116423B (en) * 2013-03-11 2016-03-30 娄恩华 The planar infrared multi-touch device and a control method
CN103116423A (en) * 2013-03-11 2013-05-22 娄恩华 Flat face infrared multi touch device and control method thereof
WO2015180248A1 (en) * 2014-05-30 2015-12-03 湖州佳格电子科技有限公司 Touch screen touch area positioning method
CN104537365A (en) * 2015-01-07 2015-04-22 小米科技有限责任公司 Touch key and fingerprint identification implementation method and device and terminal equipment
CN106293269A (en) * 2015-10-08 2017-01-04 神画科技(深圳)有限公司 Interactive remote control, interactive display system and interactive touch method
CN105260064A (en) * 2015-10-15 2016-01-20 青岛海信电器股份有限公司 Touch point identification method and apparatus, and display device
CN105260064B (en) * 2015-10-15 2018-09-28 青岛海信电器股份有限公司 Kinds of touch point recognition method and apparatus, and a display device

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