CN1797308A - Interpretation method for touch controlled induction system - Google Patents

Interpretation method for touch controlled induction system Download PDF

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CN1797308A
CN1797308A CN 200410060391 CN200410060391A CN1797308A CN 1797308 A CN1797308 A CN 1797308A CN 200410060391 CN200410060391 CN 200410060391 CN 200410060391 A CN200410060391 A CN 200410060391A CN 1797308 A CN1797308 A CN 1797308A
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value
potential
touch
capacitor
digital signal
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CN 200410060391
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CN100377055C (en )
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林怡诚
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盛群半导体股份有限公司
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Abstract

The invention is a determining method for a touch control induction device comprising a touch control pad at least connected to m X n equivalent capacitors, where m is number of equivalent capacitors in the X-axis direction and n is that in the Y-axis direction, and the determining method comprises the steps of: charging m equivalent capacitors of a column to obtain m digital signals; comparing them with one another and using the smallest as a potential reference value; repeating the above two steps to obtain n potential reference values; touching the touch control pad; scanning the touch control pad to obtain at least a potential variation value relative to m equivalent capacitors of at least a column; and comparing the potential reference value with the potential variation value to determine which point in this column on the touch control pad is touched.

Description

触控感应装置的判读方法 Judgment method for touch sensing device

技术领域 FIELD

本发明是指一种触控感应装置的判读方法,尤指一种电容式触控感应装置的判读方法。 The present invention refers to a method of interpreting a touch sensing device, particularly to a method of interpretation capacitive touch sensing device.

背景技术 Background technique

一般的触控感应装置在系统设计上可分为电阻式及电容式两种,以常用的电容式触控感应装置来说,目前所使用的侦测方法有三种,兹略述如下:(1)记录其中一个触控按键的电位后再与所有按键的充电电位相比较,微控制器最后会得知哪一个按键被按下:首先微控制器会进入储存电位基准值阶段,系统会送出一连续脉波至触控板的等效电容,在电容的另一端会感应出一电荷能量,此电荷会经由积分器而储存于电容中,再借由放大器将电容的充电电位放大,最后经过模拟/数字转换电路而被转换成数字信号后存入存储器中;之后进入按键扫描阶段,其是将触控板上每一按键的模拟/数字输出信号与存储器中的信号进行比较,当低于存储器中的信号时代表该按键有被触碰到。 General touch sensing device on the system design can be divided into two kinds of resistive and capacitive, common to the capacitive touch sensing device, the detection methods currently used, there are three, hereby outlined as follows: (1 ) in which the potential recorded after a touch key is compared with the charging potential of all keys, the microcontroller will eventually know which key has been pressed: the microcontroller first potential reference value into a storage phase, the system will send a continuous pulse to the equivalent capacitance of the touch panel, the other terminal of the capacitor a charge induced on energy, via the charge will be stored in the integrator capacitor, then the capacitor charge potential amplified by means of an amplifier, and finally through the analog / digital conversion circuit after being converted into digital signals stored in the memory; after entering the key scanning stage, which is an analog signal of each key trackpad / digital output signal is compared with the memory, when the memory is less than the signal representing the button has been touched upon.

此方法的缺点在于如果电路板在制作过程中因板材的厚度与铜箔不同或是不均匀时,会导致每个按键的等效电容的电容值亦会不均匀,也比较容易产生比对上的误差。 A disadvantage of this approach is that if the circuit board in the production process when the plate thickness and the copper foil due to different or nonuniform, will lead to an equivalent capacitance of the capacitor of each key will be non-uniform, but also easier to produce than the error.

(2)将所有按键的充电电位进行平均后所得的值与所有按键的充电电位相比较,微控制器最后得知哪一个按键被按下:在进入储存电位基准值阶段先取所有按键的等效电容的电位值进行平均之后再将其存入存储器中,之后进入按键扫描阶段,将所有按键积分电容的电位值与基准电位值进行比较,当按键电位值低于基准电位值则表示有按键被按下。 (2) the charging potential of all buttons after averaging the resulting value is compared with the charging potential of all keys, the microcontroller last known which key is pressed: first of all keys take the equivalent stage to the potential of the reference value storage after the averaged value of the capacitor voltage which is then stored in the memory, after entering the key scanning stage, the potential values ​​of all the keys of the integrating capacitor is compared with a reference voltage value, when a potential value lower than the reference potential key value indicates a key is press.

(3)将所有按键的充电电位记录后再个别进行比较,如果比较结果低于原先记录的按键电位值,则微控制器就会得知哪一个按键被按下:在储存电位基准值阶段下将所有按键的积分电容电位值都储存起来,当进入按键扫描阶段之后,将所扫描各个按键的积分电容电位值与该按键的基准积分电容电位值相比,若扫描按键模式电位低于基准积分电容电位值时表示有按键被按下。 (3) the charging potential after the recording of all the individual keys are compared, if the comparison result is below the potential of the key value previously recorded, then the microcontroller will know which key is pressed: the potential of the reference value stored in phase the potential value of integrating capacitor of all keys are stored, after entering the key scanning stage, the potential of the scanned values ​​of the respective integrating capacitor compared with a reference key value of the integrating capacitor potential key, if a potential lower than the reference scan mode button integral It represents a capacitance potential value when a key is pressed.

上述的三种方法中,第一与第二种方法虽然所使用的存储器的空间非常低,但感应的范围与灵敏度会随触控按键的增加而变得非常差;这是因为触控板上按键的等效电容会随板材、板厚与铜薄厚度的均匀度的不同,而使得等效电容的均匀度受到严重影响,导致各按键的等效电容所充的电位有所差异,所以若与原先所记录的电位相比时常会产生误判的现象,也较容易受到外在因素的干扰。 Above three methods, the method, although the first and second memory space used is very low, but induced increases the sensitivity range of the key touch becomes very poor; this is because the trackpad key equivalent capacitance will vary with different sheet, copper sheet thickness and uniformity of a thin thickness, so that the uniformity of the equivalent capacitance of the severely affected, leading to the equivalent capacitance of each of the charged potential of the keys differ, if so often produce false positives compared to the potential of the previously recorded phenomenon, it is more susceptible to interference from external factors.

第三种方法虽然可以非常有效地提高触控感应装置的感应范围与灵敏度,但如果使用在大量按键(例如:上百个)时于存储器上所占用的空间就会明显地变多,在此同时若触控感应装置中的模拟/数字电路的位元越高,则其所占用的存储器空间则会更大,两相加乘使得整体装置的处理速度变慢、运算速度降低。 Although the third method is very effective in improving the sensitivity of the touch sensing range of the sensing device, but if used in a large number of keys (for example: a hundred) is on the memory space occupied will be significantly increased, in this the higher the bit while the touch sensing means when the analog / digital circuits, then it will take up more memory space, so that the two are added by slow processing speed of the entire apparatus, reducing the operation speed.

发明内容 SUMMARY

本发明的主要目的是为了要提升电容式触控感应装置的侦测范围与灵敏度。 The main object of the present invention in order to improve the detection range and sensitivity of the capacitive touch sensing device.

本发明的另一的目的为借由取得矩阵中X轴线中具有最低积分电容电位的方式来降低存储器的使用空间,提高微控制器的处理速度,并且大幅提升触控的感应范围以及灵敏度。 Another object of the present invention is achieved by means of a matrix manner in the X axis having the lowest potential of the integration capacitance to reduce the use of memory space, to improve the processing speed of the microcontroller, and significantly improve the touch sensing range and sensitivity.

本发明的主要构想是储存电位基准值时,将每排X轴上所有的点进行比较,比较完后取最低的按键电位值后将其存入存储器中,在进入按键扫描阶段时,将X轴各排的按键电位与该排的电位基准值作比较,当电位值低于基准值则可判定有按键被按下。 The main idea of ​​the invention is to store a potential reference value, comparing each row all the points on the X axis, after the comparison will take the lowest potential value of the key stored in the memory which, when entering the key scanning stage, X the axis of each row is compared with the potential of the keys of the row potential reference value, when a potential value lower than the reference value can be determined that a key is pressed.

根据本发明的主要构想,提出一种触控感应装置的判读方法,触控感应装置的判读方法,其中该触控感应装置包括一触控板(Pad),且该触控板至少连接于m×n个等效电容,m为X轴方向上的等效电容数目,n为Y轴方向上的等效电容数目,该判读方法包括下列步骤:(a)针对X轴方向上其中一列的m个该等效电容进行充电以得到m个数字信号;(b)比较该m个数字信号,并将其中最小者作为一电位基准值;(c)重复步骤(a)-(b),以得到所有等效电容的n个该电位基准值;(d)触碰该触控板;(e)扫描该触控板,以得到相对于至少一列的m个该等效电容的至少一电位变动值;以及(f)比较该电位基准值与该电位变动值,以判读该触控板上该列中的哪一点被触碰。 According to the main idea of ​​the present invention, a method of interpretation of the touch sensing apparatus, the method interpretation of the touch sensing apparatus, wherein the touch sensing means comprises a touch pad (Pad), and the touch panel is connected at least m × n number equivalent capacitance, m is the number of equivalent capacitance in the X-axis direction, the equivalent capacitance of the n-number of Y-axis direction, the interpretation method comprising the steps: (a) m wherein for one of the X-axis direction a charging of the equivalent capacitor to obtain m number of digital signals; (b) comparing the m number of digital signals, and wherein the smallest value as a reference potential; (c) repeating steps (a) - (b), to give All the equivalent capacitance of the n reference voltage value; (d) touching the touch panel; (e) scanning the touch panel, to obtain a value for at least a variation with respect to the potential of the equivalent capacitance of the at least one of m ; and (f) comparing the reference voltage value and the voltage change value, to interpret the touch plate of the column which point is touched.

根据本发明的主要构想,提出一种触控感应装置的判读方法,其中该触控感应装置包括m×n个按键,且每个该按键连接于一电容,m为X轴方向上的按键数目,n为Y轴方向上的按键数目,该判读方法包括下列步骤:(a)针对X轴方向上其中一列的m个该电容进行充电以得到m个数字信号;(b)比较该m个数字信号,并将其中最小者作为一电位基准值;(c)重复步骤(a)-(b),以得到所有电容的n个该电位基准值;(d)触碰该触控板;(e)扫描该触控板,以得到相对于至少一列的m个该电容的至少一电位变动值;以及(f)比较该电位基准值与该电位变动值,以判读该触控板上该列中的哪一点被触碰。 According to the main idea of ​​the present invention, a method of interpretation of the touch sensing device, wherein the touch sensing means comprises the m × n key, and each key is connected to a capacitor which, m is the number of keys on the X-axis direction , n-the number of keys on the Y-axis direction, the analyzing method comprising the steps of: (a) for the m of the capacitor for charging the X-axis direction, wherein one to obtain m number of digital signals; (b) comparing the m digital signal, and wherein the smallest value as a reference potential; (c) repeating steps (a) - (b), to give the n capacitors of all the potential of the reference value; (d) touching the touch panel; (E ) scans the touch panel, to obtain a value for at least a variation with respect to a potential of at least one of the capacitive m; and (f) comparing the reference voltage value and the voltage change value, to interpret the touch panel in the column which point it is touched.

本发明借由下列图式及详细说明,可被获得更深入的了解:附图说明图1是本发明电容式触控感应装置的结构示意图;图2是本发明电容式触控感应装置的判读方法的示意图。 And the present invention is described in detail by means of the following figures, can be obtained a better understanding: Figure 1 is a schematic view of a capacitive touch sensing device according to the present invention; FIG. 2 is an interpretation of the present invention, the capacitive touch sensing device schematic of a process.

具体实施方式 Detailed ways

本发明所采用的原理为,首先必须存入各个X轴上其中某一按键的充电电位值当作电位基准值,此按键的积分电容电位值必须在同轴上为最低,以提供各按键的充电电位的比较,当有手触碰时按键上的电荷能量将会被手指吸引,而此时按键的充电电位必定低于原按键的电位基准值,此时微控制器就可以判断出按键中那一点按键被按下。 Principle is used in the present invention, it must first be stored in each of the X-axis wherein the charging potential value as a key value reference potential, the potential of the integrating capacitor value of this key must be a minimum coaxially to provide each key comparing the charging potential, when a hand is on the key touch energy charge will be attracted fingers, but this time the charging potential of the key buttons must be less than the original reference voltage value, then the microcontroller can determine keys that little button is pressed.

现以配合图1及图2的本发明实施方式的结构图及示意图来作说明:请参阅图1,其为本发明电容式触控感应装置的结构示意图,如图所示,本发明触控感应装置可以由一触控板(Pad)(连接于m×n个等效电容)或是m×n个按键所构成其中,m为X轴方向上的电容或等效电容的数目,n为Y轴方向上的电容或等效电容的数目在微控制器控制系统动作的流程上大致可分为(1)储存电位基准值以及(2)按键扫描等两个阶段;(1)储存电位基准值阶段a.先由微控制器的输出端输出一第一连续脉波至其中一列的m个电容或等效电容上。 Now to FIG. 1, and with a configuration diagram of Embodiment 2 of the present invention and a schematic view for illustration: Please refer to FIG. 1, a schematic structural view of the capacitive touch sensing device of the present invention, as shown, the touch of the present invention sensing means may be composed of a touch panel (Pad) (connected to the m × n equivalent capacitance) or the m × n keys constituted wherein, m is the number of equivalent capacitance capacitor or the X-axis direction, n is the number of capacitors or equivalent capacitance of the Y-axis direction in the process of operation of the microcontroller control system can be divided into (1) a potential reference value stored in two phases, and (2) the key scan and the like; (1) storing a reference potential phase value a. start with an output of the microcontroller outputs a pulse to the first continuous m wherein the capacitance of a capacitor or an equivalent.

b.该第一脉波经由等效电容或是按键的电容后由另一端会感应出一第一能量,并存入积分器中。 b. This first pulse by the equivalent capacitance of the capacitor or by the other end of the key will be induced in a first energy, and stored in the integrator.

c.将积分器所输出的一第一波形输入至运算放大器以进行信号放大。 c. Place a first integrator output waveform input to the operational amplifier for signal amplification.

d.运算放大器的输出在经由模拟/数字转换电路转换成一第一数字信号后,该值会被存入存储器中。 D. When the output of the operational amplifier into a first digital signal converted by the analog / digital circuits, the value is stored in the memory.

e.继续扫描直到该列(X轴)上所有按键的积分电容电位皆转换为该第一数字信号后,将其存入存储器中。 E. Continue until after the row (X-axis) the integrating capacitance potential of all keys are converted to the first digital signal, which is stored in memory.

f.最后将同一列(X轴)上所有按键的数字信号进行比较,并电位最低的留下并存入存储器中。 F. Finally, all the keys (X-axis) in the same column of the digital signal is compared, and the lowest potential of the left and stored in the memory.

g.将此值乘上一定的比例数(如95%或90%;此处乘上一定的比例数,是为了能够自由控制灵敏度的高低;比例数如果设定的越低,则触控的灵敏度会下降;若设定的太高,则可能会因为一点干扰即导致微控制器误判的情况出现,因此其可针对外部电器的机构来进行调整,以达到最佳触控范围)之后,再存入随机存取存储器中,作为电位基准值,以提供后续扫描各点之用,最后清除积分器上该按键的该第一能量。 . G this value multiplied by a certain proportion of the number (e.g., 95%, or 90%; here by a certain proportion of the number, to the level of sensitivity can be freely controlled; the lower the ratio of the number if set, the touch the sensitivity drops; if set too high, because it might lead to interference i.e. the microcontroller misjudgment occurs, so it can be adjusted against an external electrical means, to achieve the best touch range), the and then stored in a random access memory as a potential reference value to provide points of subsequent scans, and finally remove the energy of the first integrator of the button.

h.将每一列(X轴)的电容的电位基准值皆存入存储器中之后(如图2所示般),便可进入下一个按键扫描阶段,并等待使用者触碰按键或触控板。 After h. Fold each column (X-axis) of the potential of the reference capacitance values ​​are stored in the memory (as shown in FIG. 2), you can enter the next stage the key scan, and waits for the user touches a key or a touch panel .

(2)按键扫描阶段当使用者触碰按键或触控板之后,即进入按键扫描阶段,此阶段在扫描各按键后一样会经由积分器、运算放大器以及模拟/数字转换电路的处理程序,且动作一开始与储存电位基准值阶段的步骤a至步骤c相同;i.先由微控制器的输出端输出一第二连续脉波至该列的m个等效电容或电容上。 (2) phase when the user touches the key scan button or touchpad after, i.e. into the key scanning stage, this stage will be the same as the program conversion processing circuit via an integrator, an operational amplifier and an analog / digital scan after each key, and a storage operation beginning with the same step reference voltage value to a phase step c;. i first by the output of the microcontroller outputs a pulse onto a second continuous equivalent capacitance of the m capacitor or the column.

j.该第二脉波经由等效电容电容或是按键的电容后由另一端会感应出一第二能量,并存入积分器中。 J. The second pulse via the equivalent capacitance of the capacitive keys, or by the other end of the capacitor induced on a second energy, and stored in the integrator.

k.将积分器所输出的一第二波形输入至运算放大器以进行信号放大。 K. The waveform of a second integrator output to the input of the operational amplifier for signal amplification.

l.运算放大器的输出在经由模拟/数字转换电路转换成一第二数字信号后,该第二数字信号即为该按键或触控板被使用者触碰之后的电位变动值。 l. output of the operational amplifier after the transition into a second digital signal via an analog / digital conversion circuit, the second digital signal is the value of the potential change in the key or touch panel is touched after a user.

m.将该电位变动值与存储器中的该电位基准值进行比较;当该电位变动值低于该电位基准值,表示有人触摸了该按键或触控板,微控制器即送出座标值,并继续扫描下一列(X轴),反之,若该按键或触控板的该电位变动值大于或等于该电位基准值,表示该按键无人触碰,微控制器即不予理会,并继续扫描下一列(X轴)。 . M The potential fluctuation of the potential of the reference value with a comparison value memory; when the potential fluctuation of the potential value is less than the reference value, indicates that someone touches the key or the touch pad, i.e. the microcontroller sends coordinates, and continue to scan the next row (X-axis), whereas, if the potential fluctuation of the key value or touch pad greater than or equal to the reference voltage value, indicating that no key touch, i.e. ignore the microcontroller, and continue scan the next row (X-axis).

值得一提的是,实施本发明所使用的该存储器可为一随机存取存储器,而若系统发生断电或是重置开关启动时,微控制器则必须重新计算并储存电位基准值。 It is worth mentioning that, the memory used in the embodiment of the present invention may be a random access memory, and if the outage has occurred or a reset switch activated, the microcontroller must be re-calculated and stored reference voltage value.

上述实施例中的微控制器虽然是以与存储器及积分器分开设置的方式达成本发明的目的,但在实际制作上亦可以将存储器及积分器整合至微控制器中以达成本发明的发明目的。 Examples of the above-described embodiment, although the microcontroller is provided with a memory and a separate manner integrator achieve the object of the present invention, but also in the actual production and the memory may be integrated into the microcontroller integrator to achieve the present invention purpose.

综上所述,本发明的触控感应装置的判读方法可以大幅度地增加电容式触控感应装置的感测范围与灵敏度,同时在触控按键的型式与数量上将可进行各种弹性的设计与各种变化,而不会因为外部元件的电性的不理想化或是触控板的等效电容的不均匀而受到影响。 In summary, the judgment method for a touch sensing apparatus according to the present invention can greatly increase the sensing range and sensitivity of the capacitive touch sensing device, while on the type and quantity of touch keys may be made of various elastic and various design changes, and not because of non-ideal electrical or non-uniform external components equivalent capacitance touch panel affected.

Claims (10)

  1. 1.一种触控感应装置的判读方法,其中该触控感应装置包括一触控板,且该触控板至少连接于mxn个等效电容,m为X轴方向上的等效电容数目,n为Y轴方向上的等效电容数目,该判读方法包括下列步骤:(a)针对X轴方向上其中一列的m个该等效电容进行充电以得到m个数字信号;(b)比较该m个数字信号,并将其中最小者作为一电位基准值;(c)重复步骤(a)-(b),以得到所有等效电容的n个该电位基准值;(d)触碰该触控板;(e)扫描该触控板,以得到相对于至少一列的m个该等效电容的至少一电位变动值;以及(f)比较该电位基准值与该电位变动值,以判读该触控板上该列中的哪一点被触碰。 A judgment method for touch sensing device, wherein the touch sensing means comprises a touch panel, and the touch panel is connected at least to the equivalent capacitance of mxn, m is the number of equivalent capacitance in the X-axis direction, n is the number of equivalent capacitance in the Y-axis direction, the interpretation method comprising the steps of: (a) charging of the equivalent capacitor of m for the X-axis direction, wherein m to obtain a digital signal; (b) comparing the m number of digital signals, and wherein the smallest value as a reference potential; (c) repeating steps (a) - (b), to give the equivalent capacitance of all the potential of the reference value of n; (d) touching the touch control panels; (e) scanning the touch panel, to give the change value of m with respect to at least one of the equivalent capacitance of at least one potential; and (f) comparing the reference voltage value and the voltage change value, to interpret the the touch panel which point is touched in the column.
  2. 2.如权利要求1所述的判读方法,其特征在于该触控感应装置还包含一积分器以及一存储器,且步骤(a)还包括步骤如下:(a1)提供一第一脉波至m个该等效电容使其感应出一第一能量;(a2)将该第一能量存入该积分器;(a3)将该积分器的一第一输出波形放大并转换成为该第一数字信号;以及(a4)将该第一数字信号存入该存储器,其中该存储器可为一随机存取存储器。 2. The judgment method according to claim 1, wherein the touch sensing means further comprises an integrator and a memory, and the step (a) further comprises the steps of: (a1) providing a first pulse to m the equivalent capacitance of a so induces a first energy; (A2) the energy stored in the first integrator; (A3) a first output waveform of the integrator is amplified and converted into the first digital signal ; and (a4) the first digital signal stored in the memory, wherein the memory may be a random access memory.
  3. 3.如权利要求1所述的判读方法,其特征在于步骤(b)是将最小的该第一数字信号乘以一比例数以成为该电位基准值,并将该电位基准值存入该存储器,其中该比例数可由使用者指定,以自由调整触控灵敏度的高低。 3. The judgment method according to claim 1, wherein the step (b) is the smallest number of the first digital signal by a ratio value to be the reference potential, and the potential of the reference value stored in the memory wherein the ratio of the number specified by the user to freely adjust the touch sensitivity is low.
  4. 4.如权利要求1所述的判读方法,其特征在于步骤(b)还包括一步骤:清除该积分器中的该第一能量。 The judgment method as claimed in claim 1, wherein step (b) further comprises a step of: clearing the first energy of the integrator.
  5. 5.如权利要求1所述的判读方法,其特征在于步骤(d)与(e)之间还包括步骤如下:(d1)提供一第二脉波至m个该等效电容使其感应出一第二能量;(d2)将该第二能量存入该积分器;以及(d3)将该积分器的一第二输出波形放大并转换成为一第二数字信号,该第二数字信号即为该电位变动值。 5. The judgment method according to claim 1, characterized by further comprising between step (d) and (e) the following steps: (d1) providing a second pulse to make the equivalent capacitor of m induced a second energy; (D2) stored in the second energy of the integrator; and (d3) a second output waveform of the integrator is amplified and converted into a second digital signal, the digital signal is the second the potential variation value.
  6. 6.如权利要求1-5之任一项所述的判读方法,其特征在于:该触控感应装置皆包含一微控制器,用以控制各步骤;及/或该触控感应装置所包含该存储器及该积分器是整合于一微控制器中。 6. The judgment method according to any of claims 1-5, wherein: both the touch sensing apparatus comprising a microcontroller for controlling each step; and / or included in the touch sensing apparatus the memory of the integrator and is integrated in a microcontroller.
  7. 7.一种触控感应装置的判读方法,其中该触控感应装置包括一触控板,且该触控板至少连接于复数个等效电容,该判读方法包括下列步骤:(a)针对每个该等效电容进行充电以得到至少一数字信号;(b)比较每个该数字信号,并将其中最小者作为一电位基准值;(c)触碰该触控板;(d)扫描该触控板,以得到每个该等效电容的至少一电位变动值;以及(e)比较该电位基准值与每个该电位变动值,以判读该触控板上的哪一点被触碰。 A judgment method for touch sensing device, wherein the touch sensing means comprises a touch panel, and the touch panel is connected to a plurality of at least equivalent capacitance, the judgment method comprising the steps of: (a) for each the capacitor is charged one equivalent at least to obtain a digital signal; (b) comparing each of the digital signal, and wherein the smallest value as a reference potential; (c) touching the touch panel; (d) scanning the at least a potential fluctuation value trackpad, to give each of the equivalent capacitor; and (e) comparing the reference value and the potential value of each potential variation, which point to interpret the touch panel is touched.
  8. 8.一种触控感应装置的判读方法,其中该触控感应装置包括mxn个按键,且每个该按键连接于一电容,m为X轴方向上的按键数目,n为Y轴方向上的按键数目,该判读方法包括下列步骤:(a)针对X轴方向上其中一列的m个该电容进行充电以得到m个数字信号;(b)比较该m个数字信号,并将其中最小者作为一电位基准值;(c)重复步骤(a)-(b),以得到所有电容的n个该电位基准值;(d)触碰该触控板;(e)扫描该触控板,以得到相对于至少一列的m个该电容的至少一电位变动值;以及(f)比较该电位基准值与该电位变动值,以判读该触控板上该列中的哪一点被触碰。 A judgment method for touch sensing device, wherein the touch sensing means comprising mxn buttons, and each button is connected to a capacitor which, m is the number of keys on the X-axis direction, the Y-axis direction is n-a number of keys, the analyzing method comprising the steps of: (a) for the m of the capacitor for charging the X-axis direction, wherein one to obtain m number of digital signals; (b) comparing the m number of digital signals, and wherein the smallest as a reference voltage value; (c) repeating steps (a) - (b), to give the n capacitors of all the potential of the reference value; (d) touching the touch panel; (e) scanning the touch panel to m obtained with respect to a change in potential of at least a value of at least one of the capacitor; and (f) comparing the reference voltage value and the voltage change value, to interpret the touch plate of the column which point is touched.
  9. 9.一种触控感应装置的判读方法,其中该触控感应装置包括至少一按键,且每个该按键连接于一电容,该判读方法包括下列步骤:(a)针对每个该电容进行充电以得到至少一数字信号;(b)比较每个该数字信号,并将其特征在于最小者作为一电位基准值;(c)触碰该触控板;(d)扫描该触控板,以得到每个该电容的至少一电位变动值;以及(e)比较该电位基准值与每个该电位变动值,以判读该触控板上的哪一点被触碰。 A judgment method for touch sensing device, wherein the touch sensing means comprises at least one key, the key and each connected to a capacitor, the method comprising the steps of interpretation: (a) for each charging of the capacitor to obtain at least one digital signal; (b) comparing each of the digital signal, and wherein the smallest value as a reference potential; (c) touching the touch panel; (d) scanning the touch panel to at least a value obtained for each potential variation of the capacitor; and (e) comparing the reference value and the potential value of each potential variation, which point to interpret the touch panel is touched.
  10. 10.如权利要求9所述的判读方法,其特征在于该触控感应装置还包含一积分器以及一存储器,且步骤(a)还包括步骤如下:(a1)提供一第一脉波至每个该电容使其感应出一第一能量;(a2)将该第一能量存入该积分器;(a3)将该积分器的一第一输出波形放大并转换成为该第一数字信号;以及(a4)将该第一数字信号存入该存储器。 10. The judgment method according to claim 9, wherein the touch sensing means further comprises an integrator and a memory, and the step (a) further comprises the steps of: (a1) providing a first pulse to each of a capacitor so that the energy induced in a first; (A2) the energy stored in the first integrator; (A3) a first output waveform of the integrator is amplified and converted into the first digital signal; (a4) the first digital signal stored in the memory.
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