CN102331890A - Optical touch screen and optical sensing correction method thereof - Google Patents

Optical touch screen and optical sensing correction method thereof Download PDF

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Publication number
CN102331890A
CN102331890A CN201110326109A CN201110326109A CN102331890A CN 102331890 A CN102331890 A CN 102331890A CN 201110326109 A CN201110326109 A CN 201110326109A CN 201110326109 A CN201110326109 A CN 201110326109A CN 102331890 A CN102331890 A CN 102331890A
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China
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light source
optical
real
time
angle
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CN201110326109A
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Chinese (zh)
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李俊仁
郑龙凯
郭峻豪
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佳世达科技股份有限公司
苏州佳世达电通有限公司
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Priority to CN201110326109A priority Critical patent/CN102331890A/en
Publication of CN102331890A publication Critical patent/CN102331890A/en

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Abstract

The invention discloses an optical touch screen and an optical sensing correction method thereof. The optical touch screen comprises a substrate, an optical sensing module, a light source module and a sensing correction module. The sensing correction method mainly comprises the following steps of: taking a light source fixed at the periphery of an indicator as a measuring reference point, comparing a real-time value and a factory value of the light source projected to a sensing position of an optical sensor to judge whether a lens is deformed, and correcting according to the difference between the real-time value and the factory value to obtain a new angle array, so that the touch screen can always accurately acquire a coordinate of a contact point of a contact object.

Description

一种光学式触控屏及其光学感测修正方法 An optical touch screen optical sensing and correction method

技术领域 FIELD

[0001] 本发明涉及触控显示领域,尤其是一种光学式触控屏及其光学感测修正方法。 [0001] The present invention relates to the field of the touch display, particularly an optical touch screen optical sensing and correction method. 背景技术 Background technique

[0002] 随着触控技术日趋成熟,拥有大尺寸显示面板与多点触控技术的触控装置已逐渐成为市场的主流,并广泛应用于各式电子产品中,例如自动柜员机、手持式电子装置以及显示器。 [0002] With the touch technology matures, with a large touch display device with multi-touch panel technology has gradually become the mainstream market, and is widely used in various electronic products, such as automatic teller machines, handheld electronic and a display device. 一般说来,触控屏幕技术可分为电阻式、电容式以及光学式三种。 In general, touch screen technology can be divided into resistive, capacitive and optical three. 其中电阻式和电容式触控屏幕技术利用物体接触感测装置时,造成触控屏幕表面的电场变化而定位对象。 Wherein when the resistive and capacitive touch screen technology using the sensing device in contact with the object, causing changes in the electric field of the touch screen surface of the positioned object. 光学式触控屏幕技术则利用对象在触控屏幕表面上移动时,造成光路径阻断或是光影变化而定位对象。 Optical touch screen technology using the object is on the touch screen surface is moved, causing changes in the optical path of light positioned to block or object. 相对其它方式,光学式触控屏幕技术具有较低成本与实施方法相对简单等优点。 Relative to other embodiment, the optical touch screen technology has a relatively low cost and simple implementation of the method.

[0003] 请参见图1,图1是一种现有的光学式触控屏。 [0003] Referring to FIG. 1, FIG. 1 is a conventional optical touch screen. 如图所示,该光学式触控屏1包括基板10、第一光学感测模组11和第二光学感测模组12。 As shown, the optical touch panel 1 includes a substrate 10, a first optical sensing module 11 and the second optical detectors 12. 第一光学感测模组11和第二光学感测模组12分别位于基板10的两个相邻顶角上,第一光学感测模组11包括第一光学感测器111和第一透镜组112,第二光学感测模组12包括第二光学感测器121和第二透镜组122。 The first optical sensing module 11 and the second optical sensing module 12 are respectively located in two adjacent top corner of the substrate 10, a first optical sensing module 11 includes a first optical sensor 111 and the first lens group 112, the second optical sensing module 12 includes a second optical sensor 121 and the second lens group 122. 所述第一光学感测器111和第二光学感测器121都是由多个光敏器件组成的一维阵列或二维阵列,每个光敏器件形成了该第一光学感测器111或第二光学感此期121的一个感光像素。 The first optical sensor 111 and the second optical sensor 121 is a one-dimensional array or two-dimensional array of a plurality of photosensitive devices, each of which is formed a photosensitive device 111 of the first or the second optical sensor a photosensitive pixel 121 of this second optical sense. 当有接触物接触基板10时,由于接触物遮挡光线而在分别在第一光学感测器111和第二光学感测器121上形成投影,第一光学感测器111和第二光学感测器121根据该投影所在的感光像素位置P1、P2,通过预设的角度数组(angle table)换算成对应的角度Q1* θ 2,然后在利用三角计算得到θ工和θ 2的角平分线交点位置坐标(X,y),该位置坐标(X, y)即可认为是接触物的接触中心位置坐标。 When the first optical sensor 111 and second optical sensing contact 10 is contacting the substrate, the contact material blocking the light in the projection are formed on the first optical sensor 111 and the second optical sensor 121, the photosensitive pixel 121 of the projection located position P1, P2, through a preset angle array (angle table) is converted into the corresponding angle Q1 * θ 2, and then calculate [theta] and the angle bisector workers θ 2 at the intersection of triangulation position coordinate (X, y), the coordinate position (X, y) can be considered to be in contact with the contact center position coordinates thereof. 具体换算成角度的过程为按照预先定义的感光像素位置和角度之间的投映关系F(X),在角度数组中搜寻与具体感光像素位置P1、P2对应的角度Q1* θ 2,如图2所示,图2是角度数组的使用示意图。 Specific terms of the angle of the process according to the relationship projected F (X) between the photosensitive pixel position and angle of a predefined search in the angle of the photosensitive pixel array specific positions P1, P2 corresponding angle Q1 * θ 2, as shown in FIG 2 As shown in FIG. 2 is a schematic diagram of an array using the angle.

[0004] 但是设置在光学感测器上的透镜组,在温度变化时,容易热胀冷缩而发生形变,导致透镜组的放大率产生变化,从而使接触物投影在光学感测器上的感光像素位置发生偏移。 [0004] The group of lenses disposed on the optical sensor, when the temperature changes, expansion and contraction easily deformed, resulting in a difference in magnification of the lens group, so that the contact was projected on the optical sensor photosensitive pixel shifted positions. 请参见图3Α-3Β,图3Α-3Β分别表示透镜组受热膨胀和受冷收缩后形成的投影变化图。 See Figure 3Α-3Β, respectively, FIGS 3Α-3Β lens group after the formation of thermal expansion and contraction of the projected change in the cold FIG. 如图3Α所示,当透镜组受热膨胀后,接触物在光学感测器上的感光像素位置受透镜组放大率的影响,出现上偏的现象,检测出来的接触点坐标(xH,yH)高于实际坐标(x,y)。 The contact point coordinates (xH, yH) As shown, when thermal expansion of the rear lens group, the photosensitive material in contact with the pixel position on the optical sensor by impact 3Α magnification lens group, the bias phenomenon of the detected higher than the actual coordinate (x, y). 而如图3B所示,当透镜组受冷收缩时,接触物在光学感测器上的感光像素位置则出现下偏的现象, 检测出来的接触点坐标(xL,yL)低于于实际坐标(X,y)。 And as shown in FIG 3B, when the cold shrink lens group, the photosensitive material in contact with the pixel positions on the optical sensor is biased in phenomenon, the detected coordinates of the contact point (xL, yL) is lower than the actual coordinates (X, y). 这种上偏或下偏,均会使光学感测器测量到错误的接触物坐标,从而导致触控屏发出错误的触控指令。 Such partial upper or lower side, the optical sensor are measured to make contact with the wrong coordinates thereof, resulting in the wrong touch screen touch-control commands issued.

发明内容 SUMMARY

[0005] 有鉴于此,本发明的一个目的在于提供一种光学式触控屏,该光学式触控屏具备光学感测修正功能,在透镜组因热胀冷缩发生形变而引起接触物投影在光学感测器上的感光像素位置发生偏移时,可以通过修正感测位置与角度之间的投映关系,使接触点坐标能够被正确的计算得到,从而不影响触控指令的发出。 [0005] In view of this, an object of the present invention is to provide an optical touch screen, the touch screen comprising optical correction optical sensing, because the lens group caused by thermal expansion and contraction deformation occurs in contact with the projection thereof photosensitive pixel position on the optical sensor is offset, by correcting the relationship between the projected position and angle sensing, the contact point coordinates can be properly calculated, which does not affect the touch instruction is issued. 同时,本发明还提供了运用该光学式触控屏进行光学感测修正的方法。 Meanwhile, the present invention also provides a method of using the touch screen optical sensing optical correction.

[0006] 根据本发明的上述目的提出的一种光学式触控屏,包括基板、光学感测模组光源模组,所述基板包括左缘、下缘、右缘和上缘,所述光学感测模组包括光学感测器和透镜组, 所述光学式触控屏还包括感测修正模组,所述感测修正模组连接在光学感测模组上,所述感测修正模组包括: [0006] According to the proposed object of the present invention an optical touch screen, comprising a substrate, optical sensing module light source module, the substrate comprises a left edge, a lower edge, right edge and an upper edge, said optical the sensing module comprises an optical sensor and a lens group, the optical touch panel further comprising a sensing correction module, the sensing module is connected to the correction of the optical sensor module, the sensing module correction group include:

[0007] 启动单元,用以开启所述感测修正模组,使触控屏进入修正模式; [0007] The starting unit for turning on the correction module sensing the touch screen to enter the correction mode;

[0008] 存储单元,用以存储出厂光源位置参数和实时角度数组,所述出厂光源位置参数为触控屏在出厂时,光源模组中光源在所述光学感测器上被感测到像素位置的出厂值; [0008] The storage unit for storing real-time parameters and factory light source position angle of the array, the light source position parameter factory touch screen at the factory, in the light source module is sensed on the optical pixel sensor Default value of the location;

[0009] 比较单元,用以比较光源在光学感测器上的感测到像素位置的实时值和出厂值之间的差别,并输出比较结果;以及 [0009] comparison means for comparing a sense of a light source on the optical sensor to the difference between the measured value and the real value of the pixel position of the factory, and outputs a comparison result;

[0010] 计算单元,接受所述比较结果,并根据该比较结果更新所述存储单元中的实时角度数组。 [0010] calculation means receiving said comparison result, and updating the array based on the comparison result of the real-time storage unit angle.

[0011] 可选的,所述光源模组包括光源和导光单元,分布在基板的左缘、下缘、右缘或者上缘中的至少一条缘上。 [0011] Alternatively, the light source module comprises a light source and a light guide device, located in the left edge of the substrate, a lower edge, upper edge or right edge of at least one edge.

[0012] 可选的,所述光源为LED,所述导光单元配置1至2个光源。 [0012] Alternatively, the light source is an LED, the light guiding unit arranged light sources 1-2.

[0013] 可选的,所述启动单元包括计时器,用以设定启动修正模式的周期。 [0013] Optionally, said activation unit includes a timer for setting a correction mode start-up period.

[0014] 同时,本发明提出了一种运用上述的光学式触控屏的进行光学感测修正的方法, 该修正方法包括: [0014] Meanwhile, the present invention provides a method of using the above-described optical touch panel optically sensing correction, the correction method comprises:

[0015] 1)启动光学修正模式; [0015] 1) The optical correction mode is started;

[0016] 2)检测光源的位置,并生成该光源感测位置的实时值; Position [0016] 2) detecting light source, and generates a real value of the sensed position of the light source;

[0017] 3)将上述实时值与该光源的出厂值比较,生成比较结果; [0017] 3) The real-time value of the light source and the factory value, and generates a comparison result;

[0018] 4)根据该比较结果,生成实时角度数组。 [0018] 4) based on the comparison result, generating an array of real-time angle.

[0019] 可选的,上述步骤1)中,启动修正模式的时机包括:触控屏开机时、触控屏开机后固定间隔时间点上、检测到环境温度变化时,或者有人员输入开启修正模式指令时。 [0019] Alternatively, 1) In the above step, start time correction mode comprising: a touch screen when the boot, the boot touch screen fixed interval of time points, the detected ambient temperature changes, or have inputs the correction opening when the mode command.

[0020] 可选的,在上述步骤2)中:光源的感测位置包括在光学感测模组中的光源位置。 [0020] Optionally, in) above step 2: the light source comprises a light source position sensing position in the optical sensing module.

[0021] 可选的,在上述步骤3)中,比较结果分为出厂值和实时值相同以及出厂值和实时值不同两种。 [0021] Optionally, in) step 3 above, the comparison result is divided into the same real-time values ​​and the factory-default values, and real-time values ​​and two different values.

[0022] 可选的,在上述步骤4)中,当出厂值和实时值相同时,计算单元以出厂时烧录在存储单元中的角度数组为实时角度数组。 [0022] Optionally, in) in the above step 4, when the factory and Real values ​​are the same, the calculation unit to the factory programmed in the memory cell array is the angle real angle array.

[0023] 可选的,在上述步骤4)中,当出厂值和实时值不同时,计算单元修正光学感测器上的像素位置与角度之间的投映关系,计算出新的角度数组,并以该新的角度数组为实时角度数组。 [0023] Optionally, in) in the above step 4, when the factory and Real values ​​are different, the correction calculating unit projected relationship between the pixel position and angle on the optical sensor, to calculate a new angular array, and in this new perspective array is an array of real-time point of view.

[0024] 与现有技术相比较,本发明的光学式触控屏及其光学感测修正方法的特点在于: [0024] Compared with the prior art, the optical characteristics of the optical sensing and touch screen correction method of the present invention:

[0025] 一、通过增加感测修正模组,使得触控屏在不同温度下,因透镜组发生形变而引起的触控点坐标偏移问题得到修正。 [0025] First, by increasing the correcting sensing module, such that at different temperature touch screen, the touch point coordinate shift lens group deformed due to problems caused corrected.

[0026] 二、该感测修正模组主要依据固定在指示区周围的光源为测量参考点,不需要增加其它附件。 [0026] Second, the sensing module is mainly based on the correction light source secured around the area indicated as the measurement reference point, without adding other accessories.

[0027] 三、利用光源发光亮度大于导光单元的特点,使光学感测器能够简单容易的感测到光源位置,通过比对光源投影到光学感测器上感光像素位置的实时值和出厂值,判断透镜是否发生形变,并依据这两者之间的差异修正得到新的角度数组,从而使触控屏能够始终准确的得到接触物的接触点坐标。 [0027] Third, the use of light emission luminance characteristics of the light guide unit is larger than the optical sensor can be simple and easy to sense the position of the light source, the light source by alignment of the optical sensor in real time onto a photosensitive pixel value and location of the factory value, it is determined whether the occurrence of deformation of the lens, and based on the difference between the two newly obtained correction angle array so that the touch screen can always accurately obtain the coordinates of the contact point of the contact material.

附图说明 BRIEF DESCRIPTION

[0028] 为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。 [0028] In order to more clearly illustrate the technical solutions in the embodiments or the prior art embodiment of the present invention, briefly introduced hereinafter, embodiments are described below in the accompanying drawings or described in the prior art needed to be used in describing the embodiments the drawings are only some embodiments of the present invention, those of ordinary skill in the art is concerned, without creative efforts, can derive from these drawings other drawings.

[0029] 图1是一种现有的光学式触控屏结构示意图; [0029] FIG. 1 is a schematic view of a conventional optical touch panel structure;

[0030] 图2是角度数组的使用示意图; [0030] FIG. 2 is a schematic view of using the angle of the array;

[0031] 图3A-3B分别表示透镜组受热膨胀和受冷收缩后形成的投影变化图; [0031] Figures 3A-3B respectively represent the thermal expansion of the lens group and is formed by a projection of FIG changes after cold shrink;

[0032] 图4是本发明的光学式触控屏的结构示意图; [0032] FIG. 4 is a schematic view of an optical touch panel of the present invention;

[0033] 图5是本发明的感测修正模组的模块示意图; [0033] FIG. 5 is amended sensing module schematic block diagram of the present invention;

[0034] 图6是本发明的更新角度数组的计算方法示意图; [0034] FIG. 6 is a schematic view of an angle calculation method for updating the array of the present invention;

[0035] 图7是本发明的光学式触控屏进行光学感测修正的方法流程图。 [0035] FIG. 7 is an optical touch panel of the present invention an optical sensing method of correcting the measured flow chart.

具体实施方式 Detailed ways

[0036] 下面结合附图对本发明的具体实施方式做详细说明。 [0036] The following description of the drawings in detail specific embodiments of the present invention binds.

[0037] 请参见图4,图4是本发明的光学式触控屏的结构示意图。 [0037] Referring to FIG. 4, FIG. 4 is a schematic view of an optical touch panel of the present invention. 如图所示,该光学式触控屏2包括基板20、光学感测模组、光源模组23以及感测修正模组24。 As shown, the optical touch panel 20 comprises a substrate 2, an optical sensor module, a light source module 23 and a sensing module 24 correction.

[0038] 基板20包括左缘201、下缘202、右缘203、上缘204以及左缘201、下缘202、右缘203、上缘204所围成的指示区205,指示区205可供接触物进行接触,接触物在指示区205 中的接触位置就是触控操作点。 [0038] The substrate 20 includes a left edge 201, a lower edge 202, a right edge 203, upper edge 204 and a left edge 201, a lower edge 202, a right edge 203, upper edge 204 surrounded indication region 205, region 205 for indicating was contacting the contact, the contact position was indicated in the region 205 is the touch operation point.

[0039] 光学感测模组包括第一光学感测模组21和第二光学感测模组22。 [0039] The optical sensing module comprises a first optical sensing module 21 and the second optical detectors 22. 第一光学感测模组21位于左缘201和上缘204交互的左上角上,该第一光学感测模组21包括第一光学感测器211和第一透镜组212。 The first optical sensing module 21 is located on the upper left corner edges 201 and 204 interact with the left edge, the first optical sensing module 21 includes a first optical sensor 211 and the first lens group 212. 第二光学感测模组22位于右缘203和上缘204交互的右上角上,该第二光学感测模组22包括第二光学感测器221和第二透镜组222。 The second optical sensing module 22 is located on the right edge 203 and upper edge 204 of the upper right corner of the interaction, the second optical sensing module 22 includes a second optical sensor 221 and the second lens group 222. 该第一光学感测模组21和第二光学感测模组22分别斜向的向指示区205摄取光学影像,举例来说,第一光学感测模组21向对应的下缘202及右缘203的范围摄取影像,第二光学感测模组22向对应的下缘202及左缘201的范围摄取影像。 The first optical sensing module 21 and the second optical sensing module 22 are oblique image 205 to indicate the optical pickup area, for example, a first optical sensing module 21 to the corresponding lower edge 202 and right edge image pickup range 203, the second optical sensing module 22 to the image pickup range corresponding to the lower edge 202 and left edge 201. 第一光学感测器211和第二光学感测器221 可以是线性传感器(linear sensor),也可以是区域传感器(area sensor),每个传感器上都是由多个光敏器件排列而成,该单个光敏器件形成第一光学感测器211或第二光学感测器221的一个感光像素。 The first optical sensor 211 and the second optical sensor 221 may be a linear sensor (linear sensor), or may be an area sensor (area sensor), the sensor is arranged on each of a plurality of light-sensing device from the a first photosensitive device is formed of a single optical sensor 211 or a photosensitive pixel of the second optical sensor 221.

[0040] 光源模组23包括多个光源和导光单元组成,该多个光源和导光单元分布在基板20的上缘、下缘、左缘或右缘的至少1条缘上,用以将光源发出的光导入指示区205内。 At least one edge [0040] The light source module 23 includes a plurality of light sources and the light guide units, the plurality of light sources and the light guide units are distributed on the edge of the substrate 20, lower edge, left edge or right edge for area 205 indicates the light introducing light emitted. 所述光源通常为LED,所述导光单元通常配置1至2个光源,视导光单元的长度而定。 The light source is typically an LED, the light guide units are generally arranged light sources 1-2 depending on the length of the light guide unit may be. 举例而言,在本实施方式中,设置在左缘201上的光源模组23,其导光单元比较短,因此只配置了一个光源。 For example, in the present embodiment, the left edge 201 is provided on the light source module 23, the light guide unit is relatively short, so only the configuration of a light source. 而设置在下缘202上的光源模组23,其导光单元比较长,因此配置了两个光源,分别位于该导光单元的两侧。 Provided a light source module 202 on the lower edge 23, a relatively long light guide unit, the configuration of the two light sources, which are located on both sides of the light guide unit. 需要注意的是,具体的光源和导管单元的设置,可以视不同尺寸和不同领域的触控屏而定,而不应限制于本实施方式所列举的方式。 It should be noted that the specific light source and the conduit means is provided, and can be different sizes depending on the field of touch screen may be, but are not limited to the embodiment according to the present embodiment exemplified embodiment.

[0041] 在正常工作状态下,当接触物接触指示区205时,对应下缘202和右缘203上的光源模组23所发出的光被接触物遮挡,故在第一光学感测器211上产生第一实像RCl,对应下缘202和左缘201上的光源模组23所发出的光被接触物遮挡,故在第二光学感测器221上产生第二实像RCl。 [0041] In normal operation, when the contact region 205 contacting an indication, the corresponding light is blocked in contact with the lower edge thereof and a light source module 202 on the right edge of the 20,323 issued, so that the first optical sensor 211 generating a real image on a first RCl, corresponding to the lower edge of the light source module 202 and the left edge of the 20,123 issued contact object is blocked, so generating a second real image RCl on the second optical sensor 221.

[0042] 进一步的,在一些具有多点触控功能的触控屏中,在下缘或者左缘、右缘两侧的光源模组前面,还可以设置一镜面反射单元25,该镜面反射单元25可以反射上缘或者与之相对的左缘、右缘两侧上的光源模组发出的光线,并在第一光学感测器211上产生第一虚像VC1,在第二光学感测器221上产生第二虚像VC2。 [0042] Further, in some multi-touch touch screen function, the lower edge or the left edge in front of a light source module, and right sides of the edge may also be provided with a reflecting mirror unit 25, the reflecting mirror unit 25 It may reflect an upper edge or a left edge opposite thereto, the light source module on the right side edges emitted, and generating a first virtual image VC1 on the first optical sensor 211, 221 on the second optical sensor generating a second virtual image VC2.

[0043] 触控屏2可以根据第一实像RCl、第二实像RC2 (在有镜面反射单元时还包括第一虚像VCl和第二虚像VC2),可以计算得到接触物的接触点坐标,从而触发触控指令。 [0043] The touch screen 2 may be the first real image RCl, RC2 second real image (a mirror reflecting means comprises a first virtual image Shihai VCl and VC2 of the second virtual image), can be calculated coordinates of the contact point of the contact material, according to trigger touch command. 具体的计算方式可参照公开号为CN101907956的中国专利申请文本,本发明将不做展开。 Specific reference may be calculated Chinese Patent Application Publication No. CN101907956 text of the present invention and will not be expanded.

[0044] 感测修正模组24连接在第一光学感测模组21和第二光学感测模组22上,该感测修正模组24于平时工作模式下,向触控屏2提供实时角度数组(angle table),触控屏2 依据该实时角度数组(angle table),将两个光学感测模组感测到的影像像素位置换算成角度值,从而进行坐标计算。 [0044] Fixed sensing module 24 is connected to the first optical sensing module 21 and the second optical sensing module 22, the correction module 24 to sense the normal operating mode, to provide real-time touch screen 2 array angle (angle table), the touch panel 2 according to the real-time array angle (angle table), the two optical sensing module sensing the position of the image pixel is converted into an angle value, thereby performing coordinate calculation. 该感测修正模组24于修正模式下,通过比对光学感测器上感测到的光源模组中光源的像素位置,判断是否需要更正实时角度数组(angle table)中的角度和像素位置的投映关系,以及在需要更新的条件下,计算出新的实时角度数组(angle table)以取代旧的实时角度数组(angle table)。 The sense module 24 sensing correction at the correction mode, by comparing the pixel position on the optical sensor senses the light source to a light source module, it is determined whether to correct angular position of the real angle and the pixel array (angle table) of the projected relationship, and under the conditions needs to be updated in real time to calculate a new array angle (angle table) to replace the old real-time array angle (angle table).

[0045] 请参见图5,图5是本发明的感测修正模组的模块示意图。 [0045] Referring to FIG. 5, FIG. 5 is a sensing module of amendments of the present invention is a module schematic diagram. 如图所示,该感测修正模组24包括: As shown, the sensing module 24 includes a correction:

[0046] 启动单元241,用以开启所述感测修正模组24,使触控屏进入修正模式。 [0046] The starting unit 241, for opening the correction module 24 to sense the touch screen to enter the correction mode. 该启动单元241可以主动启动,也可以被动启动。 The starting unit 241 may take the initiative to start, may be passively activated. 主动启动时,操作人员可以根据操作环境,比如从空调环境下换到室外高温环境,或者在使用一段时间后触控屏本身的电子元件发热导致温度变化,输入启动修正模式的指令,此时启动单元241启动整个感测修正模组24进入修正模式。 When start automatically, the operator can operate according to the environment, such as changing from the outdoor air-conditioned environment to a high temperature environment, or after a period of use of the touch screen itself due to heat generation of the electronic component temperature change command, start the input correction mode, the startup the entire sensing unit 241 starts the correction module 24 to enter the correction mode. 被动启动主要指触控屏自动进入修正模式,启动的条件可以有如下几种情况:第一,触控屏2开机时,启动单元241同时启动修正模式,这种情况适合移动式触控屏,比如手机、手提电脑、微型多媒体器件等的触控屏。 Mainly refers to passive start touch screen automatically enter the correction mode, the condition may be initiated following situations: First, when start touch screen 2, while starting unit 241 starts the correction mode, the case for mobile touch screen, such as mobile phones, laptops, mini-multimedia devices such as touch screen. 第二,以间隔固定时间为周期,启动修正模式, 在这种情况下,往往需要在启动单元241上增加一个计时器,通过设定启动周期,使启动单元241每隔一定时间进入修正模式,这种情况适合大尺寸或自身发热量大的触控屏。 Second, at intervals of a fixed time period, the correction mode is started, in this case, a timer is often necessary to increase the initiating unit 241, by setting the start-up period, the starter unit 241 enters correction mode at regular time intervals, this case is suitable for large size or self-heating large touch screen. 第三, 通过设置温度检测装置,时时检测环境温度,当温度变化区间大于一定范围时,进入修正模式,这种情况比较适合户外媒体或环境温度变化明显的触控屏。 Third, by providing the temperature detecting means, the detected ambient temperature from time to time, when the temperature range is greater than a certain range, proceed to the correction mode, this is more suitable for outdoor media apparent touch screen or the ambient temperature changes.

[0047] 存储单元242,用以存储光源位置参数的出厂值和实时角度数组,所述光源位置参数的出厂值主要记录的是,触控屏在出厂时,光源模组中各个光源在两个光学感测器上被感测到的感光像素位置。 [0047] The storage unit 242 for storing the position of the light source and the real-time parameter values ​​of the factory angle array, recording the main factory value parameter is the position of the light source, the touch screen at the factory, each of the light sources in the light source module in two It is sensed photosensitive pixel position on the optical sensor. 因为通常光源模组中,光源处的发光亮度比导光单元中发光亮度要亮,因此在光学感测器上,光源的投影位置处的感光像素检测到的光亮要比其他像素高, 光学感测器可以依据此特点判断出光源的位置坐标,作为光源位置参数。 Because generally light source module, the light emission luminance at the light emission luminance ratio of the light guide unit to light, so the optical sensor, the position of the photosensitive pixel of the projection light source is detected other than pixels high, optical sensor this feature can be measured is determined based on the position coordinates of the light source, the light source position as a parameter. 工厂端在生产触控屏的过程中,在最终测试(Final Test)时,可以将第一光学感测器和第二光学感测器上检测到的光源位置坐标对应的光源位置参数分别烧录到存储单元242上,作为参考标准的出厂值。 In the production factory terminal touch screen process, in the final test (Final Test), can be detected on the first optical sensor and the second optical sensor corresponding to the light source position coordinate position parameters are programmed onto the storage unit 242, as a reference standard default values. 并同时将此时对应到的角度数组烧录到存储单元中。 At this time, while the angle corresponding to the array of burn in the storage unit.

[0048] 比较单元243,用以比较光源位置参数的实时值和出厂值之间的差别,并输出比较结果。 [0048] The comparison unit 243, the difference between the real value and the default value of the parameter for comparing the position of the light source, and outputs a comparison result. 当启动单元241发出启动信号,触控屏进入修正模式后,第一光学感测器和第二光学感测器就开始感测至少一个光源的位置,并将该光源感测到的位置参数作为实时值发送给比较单元243,比较单元243同时读取存储单元242中该光源位置参数的出厂值,并将实时值和出厂值进行比较,输出该比较结果。 When the starting unit emits a start signal 241, the touch screen to enter the correction mode, a first optical sensor and a second optical sensor begins sensing the at least one position measuring light source, as the light source and the sensed position parameters real-time value to the comparison unit 243, comparison unit 243 simultaneously reads the default value of the light source 242 in a position parameter storing unit, and the default value and the real value are compared, and outputs the comparison result.

[0049] 计算单元244,接受所述比较结果,并根据该比较结果更新所述存储单元中的实时角度数组。 [0049] The calculation unit 244, receiving said comparison result, and updating the array based on the comparison result of the real-time storage unit angle. 计算单元244接受到该比较结果后,首先做一个判断的动作,当比较结果为实时值和出厂值相同时,说明此时透镜组的与出厂时的放大率相同并没有发生形变,计算单元244以出厂时烧录在存储单元24中的角度数组为当前的实时角度数组;当比较结果为实时值和出厂值不同时,计算单元244依据光源位置参数的实时值,修正光学感测器上感光像素位置与角度之间的投映关系,重新计算生成新的角度数组,并以新的角度数组作为当前的实时角度数组烧录到存储单元242上。 After calculating unit 244 receives the result of the comparison, a determination is first made of the operation, when the comparison result of the real-time value and the values ​​are the same factory, the factory described with the same magnification lens group at this time and the strain does not occur, the calculation unit 244 to burn in the storage unit 24, the angle of the array at the factory for the current real-time array angle; real-time values ​​when the comparison result is not the same value and the factory, the value of the real-time calculation unit 244 of the source position based on the parameter, the correction on the photosensitive optical sensor projected relationship between the pixel position and angle, angle recalculated generate new array, and the array as an angle to a new angle in real time the current on the memory cell array 242 to burn.

[0050] 请参照图6,图6是更新角度数组的计算方法示意图。 [0050] Referring to FIG. 6, FIG. 6 is a schematic view of an angle calculation method for updating the array. 如图所示,当其中某个光源的感光像素位置发生变化时,比如由PLl上移到PL3,如果继续按照原有的角度数组,得到的角度应该为θ 3,这会使得触控屏最终得到一个错误的触控点坐标。 As shown, when the photosensitive pixel position where a light source is changed, such as shifted from the PLl PL3, if continue to follow the original angle of the array, should be obtained angle θ 3, which would make the final touch screen get a wrong touch point coordinates. 因此计算单元244会将原有的角度数组都下移两个单位,使得PL3对应的角度重新变回θ1()这样一来,因为透镜组发生形变而导致的感光像素位置偏移,可以在新的角度数组中,得到修正。 The calculation unit 244 will have the original angular array down two units, such PL3 change back to the corresponding angle theta] 1 () Thus, since the photosensitive pixel deformed lens group caused by positional deviation may be new angle array, corrected. 使触控屏可以保证接触物的接触点坐标能够被正确的计算出来,从而不影响触控指令的触发。 The touch screen may ensure that the contact point coordinates of the contact of the object can be correctly calculated, which does not affect the touch trigger command.

[0051] 请参见图7,图7是本发明的光学式触控屏进行光学感测修正的方法流程图。 [0051] Referring to FIG. 7, FIG. 7 is a method of optical touch panel of the present invention is the correction of optical sensing flowchart. 如图所示,该修正方法包括步骤: As shown, the correction method comprising the steps of:

[0052] Sll :启动修正模式。 [0052] Sll: Start correction mode.

[0053] S12 :检测至少一个光源的位置,并生成该光源感测位置的实时值。 [0053] S12: detecting at least one light source position, and generates a sensed position of the light source in real time values.

[0054] S13 :将上述实时值与该光源位置参数的出厂值比较,生成比较结果。 [0054] S13: The default value of said real time value of the parameter of the light source position, and generates a comparison result.

[0055] S14 :根据该比较结果,生成实时角度数组。 [0055] S14: Based on the comparison result, generating an array of real-time angle.

[0056] 在上述步骤Sll中,启动修正模式的时机包括:触控屏开机时、触控屏开机后固定间隔时间点上、温度检测器检测到环境温度变化时,或者有人员输入开启修正模式指令时。 [0056] In the step Sll, the start timing correction mode comprising: a touch screen when the boot, the boot touch screen point of time at regular intervals, the temperature detector detects the ambient temperature changes, or have inputs the correction mode is turned on instruction.

[0057] 在上述步骤S12中:检测该光源的位置包括在第一光学感测模组中检测该光源的实像位置和虚像位置,以及在第二光学感测模组中检测该光源的实像位置和虚像位置。 [0057] In the above-described Step S12: detecting the position of the light source position and the real image comprises detecting the position of the virtual image of the light source in a first optical sensing module, and in detecting the position of the real image of the light source in the second optical sensing module and a virtual image position.

[0058] 在上述步骤S13中,比较结果分为出厂值和实时值相同以及出厂值和实时值不同两种。 [0058] In the step S13, the comparison result is divided into the same real-time values ​​and the factory-default values, and real-time values ​​and two different values.

[0059] 在上述步骤S14中,当出厂值和实时值相同时,计算单元以出厂时烧录在存储单元中的角度数组为实时角度数组;当出厂值和实时值不同时,计算单元修正第一光学感测器和第二光学感测器上的感光像素位置与角度之间的投映关系,计算出新的角度数组,并以该新的角度数组为实时角度数组烧录到存储单元242上。 [0059] In the above-described step S14, when the factory and Real values ​​are the same, the calculation unit to the factory programmed in the memory cell array is the angle real angle array; when the factory and Real values ​​are different, the first calculation unit corrects projected relationship between the pixel position and angle on a photosensitive optical sensor and a second optical sensor, to calculate a new array angle, and the angle to the new array to the array for real-time programming memory cell 242 angle .

[0060] 综上所述,本发明提出的光学式触控屏中,由于增加了感测修正模组,使得触控屏在不同温度下,因透镜组发生形变而引起的触控点坐标偏移问题得到修正。 [0060] In summary, the optical touch panel of the present invention proposed, due to the increased sensing correction module, such that the touch screen at different temperatures, due to the coordinates of the touch point caused by the deformed lens group Partial shift has been corrected. 该感测修正模组主要依据固定在指示区周围的光源为测量参考点,通过比对光源投影到光学感测器上感测位置的实时值和出厂值,判断透镜是否发生形变,并依据这两者之间的差异修正得到新的角度数组,从而使触控屏能够始终准确的得到接触物的接触点坐标。 The sensing module is mainly based on the correction light indicator zone surrounding the fixed reference point for the measurement, the real-time value and the sensed position of the factory value, lens deformation has occurred is determined by comparing the light projected onto the optical sensor, and based on this differences between the two corrected to obtain a new angle array so that the touch screen can always accurately obtain the coordinates of the contact point of the contact material. [0061] 对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。 [0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. 对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。 Various modifications to these professionals skilled in the art of the present embodiments will be apparent, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. 因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。 Accordingly, the present invention will not be limited to the embodiments shown herein but is to be accorded herein consistent with the principles and novel features disclosed widest scope.

Claims (9)

1. 一种光学式触控屏,包括基板、光学感测模组、光源模组,所述基板包括左缘、下缘、 右缘和上缘,所述光学感测模组包括光学感测器和透镜组,所述光源模组包括光源和导光单元,分布在基板的左缘、下缘、右缘或者上缘中的至少一条缘上,其特征在于:所述光学式触控屏还包括感测修正模组,所述感测修正模组连接在光学感测模组上,该感测修正模组包括:启动单元,用以开启所述感测修正模组,使触控屏进入修正模式; 存储单元,用以存储光源位置参数的出厂值、实时值和实时角度数组,所述光源位置参数的出厂值和实时值分别为触控屏在出厂和实时使用时,光源模组中光源在所述光学感测器上被感测到的感光像素位置;比较单元,用以比较光源位置参数的实时值和出厂值之间的差别,并输出比较结果;以及计算单元,接受所述比较结 An optical touch screen, comprising a substrate, an optical sensing module, light source module, said substrate comprises a left edge, a lower edge, right edge and an upper edge, said optical sensing module comprises an optical sensing and the lens group, the light source module comprises a light source and a light guide device, located in the left edge of the substrate, a lower edge, an upper edge or right edge of at least one edge, characterized in that: said optical touch screen further comprising a sensing module correction, correction of the sensing module is connected to the optical sensing module, sensing the correction module comprising: a starting unit for correcting said opening sensing module sensing the touch screen entering correction mode; a storage unit for storing the position of the light source parameter default values, real-time and real-time values ​​of the angle of the array, the default value of the light source position and the real-time parameter values ​​of the touch screen at the factory and the use of real-time, the light source module the light source is sensed in the optical sensor sensed photosensitive pixel position; comparison unit for real-time value and the difference between the default parameter value comparing light source position, and outputting a comparison result; and a calculation unit operable to receive the said comparison result ,并根据该比较结果更新所述存储单元中的实时角度数组。 And updating the array based on the comparison result of the real-time storage unit angle.
2.如权利要求1所述的光学式触控屏,其特征在于:所述光源为LED,所述导光单元配置1至2个光源。 2. The optical touch panel according to claim 1, wherein: said light source is an LED, the light guiding unit arranged light sources 1-2.
3.如权利要求1所述的光学式触控屏,其特征在于:所述启动单元包括计时器,用以设定启动修正模式的周期。 3. The optical touch panel according to claim 1, wherein: the cycle unit includes a timer for setting the starting mode to start the correction.
4. 一种利用权利要求1所述的感测修正模组进行光学感测修正的方法,其特征在于, 所述修正方法包括:1)启动光学修正模式;2)检测光源的位置,并生成该光源位置参数的实时值;3)将上述光源位置参数的实时值与该光源位置参数的出厂值比较,生成比较结果;4)根据该比较结果,生成实时角度数组。 A use as claimed in claim sensing module of claim 1 for correcting the measured optical sensor correction method, wherein, said correcting method comprising: 1) Start mode optical correction; 2) position detecting light source, and generates the real value of the parameter of the light source; 3) the real value of the parameter is compared with the light source position to the default value of the parameter of the light source, generating a comparison result; 4) based on the comparison result, generating an array of real-time angle.
5.如权利要求4所述的光学感测修正方法,其特征在于:上述步骤1)中,启动修正模式的时机包括:触控屏开机时、触控屏开机后固定间隔时间点上、检测到环境温度变化时, 或者有人员输入开启修正模式指令时。 5. The optical sensing correction method according to claim 4, wherein: step 1), the start timing correction mode comprising: a touch screen when the boot, the boot touch screen fixed interval of time points, detection when the ambient temperature changes, or have inputs the instruction open time correction mode.
6.如权利要求4所述的光学感测修正方法,其特征在于:在上述步骤2)中:检测该光源的位置包括在光学感测模组中检测该光源的影像位置。 Optical sensing correction method as claimed in claim 4, characterized in that: in) 2 In the above step of: detecting the position of the light source images comprises detecting the position of the light source in the optical sensing module.
7.如权利要求4所述的光学感测修正方法,其特征在于:在上述步骤3)中,比较结果分为出厂值和实时值相同以及出厂值和实时值不同两种。 7. The optical sensing correction method according to claim 4, wherein: in) in the above step 3, the comparison result is divided into the same real-time values ​​and the factory-default values, and real-time values ​​and two different values.
8.如权利要求7所述的光学感测修正方法,其特征在于:在上述步骤4)中,当出厂值和实时值相同时,计算单元以出厂时烧录在存储单元中的角度数组为实时角度数组。 8. The optical sensing correction method according to claim 7, wherein: in) in the above step 4, when the factory and Real values ​​are the same, the calculation unit to the factory programmed in the memory cell array is the angle Real-time angle array.
9.如权利要求7所述的光学感测修正方法,其特征在于:在上述步骤4)中,当出厂值和实时值不同时,计算单元修正光学感测器上的感光像素位置与角度之间的投映关系,计算出新的角度数组,并以该新的角度数组为实时角度数组烧录到存储单元上。 9. The optical sensing correction method according to claim 7, wherein: in) in the above step 4, when the factory and Real values ​​are different, the photosensitive pixel calculation unit corrects the position and angle of the optical sensor between the projected relationship, to calculate a new array angle, and the angle of the array to the new array is burned onto the real-time storage unit angle.
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