201007538 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種觸控感應器（touch sensor)驅動方 法、裝置以及電容式觸控模組，且特別是有關於一種提供可產 生近似弦波波形的純或近似弦波電流源到銦錫氧化物(Indium Tin Oxide，IT0)觸控感應器的觸控感應器驅動方法、裝置以及 電容式觸控模組。 【先前技術】 ❹ 因應整合與時尚風潮’各式觸控與偵測技術被應用到筆記 型電服、鍵盤、行動電話、數位影音播放器、數位相機等手持 裝置、行動通訊與電腦週邊產品，並且IT〇也被廣泛應用在觸 控模組中。請參閱圖1，其係習知具有雙層ΙΤ〇導線(trace)的 二維電容式觸控感應器示意圖。觸控感應器10具有多條父轴 導線11與Y轴導線12，各導線具有多個感應器接點(sens〇r pad) 13與各感應器接點之間的連接線μ。對於任一條導線η 與12而^，電阻主要的貢獻來源來自連接線14，電容則是感 應器接點13本身對地的電容。舉例來說，假設某一 ΙΤ〇製程 的ITO sheet其電阻值為每單位面積1〇〇Ω，兩個感應器接點 13之間具有7個單位，並且整條導線共有9條連接線，則電 阻值將為7*1〇〇* 9=6300Ω ’而每個感應器接點13對地的電容 例如可以是4pF，因此整條導線的電路模型可以確立。 另一方面，對於二維電容式觸控感應器驅動訊號產生與提 2 ’美@發明專利第6,323,846號主張以電源供魅裝置供應 疋電壓源’而第5,920,309號則主張以調變器(modulator)提供 驅動訊號’並且此驅動訊號可以是電壓源或是固定頻率之正負 兩方向=疋電流源。進一步來看，美國發明專利第5,92〇,3〇9 號以固定頻率之正負兩方向的定電流源是以所形成的方波電 5 201007538 流源對觸控感應器進行充放電。 然而，因為ITO的電阻特性使得導電特性不及金屬，觸控 感應器具有等效的RC網路特性’從而造纽號在此網路末 端（觸控感應器前級）產生嚴重衰減，進而使得觸控板控制器 f信號制上的瞻：此外，由於方波具有高躺諧波，使得 信號在ΠΌ導線的前級觸控感應器即被嚴重衰減。因此，一 種可消除或減緩訊號衰減的觸控感應器驅動方法、裝置以 容式觸控模組實為所冀。 ❹201007538 IX. Description of the Invention: [Technical Field] The present invention relates to a touch sensor driving method and device, and a capacitive touch module, and more particularly to providing a similar chord A pure or approximate sinusoidal current source of a wave waveform to a touch sensor driving method, device, and capacitive touch module of an Indium Tin Oxide (IT0) touch sensor. [Prior Art] ❹ Due to integration and fashion trends, various touch and detection technologies are applied to handheld devices such as notebooks, keyboards, mobile phones, digital video players, digital cameras, mobile communication and computer peripheral products. And IT〇 is also widely used in touch modules. Please refer to FIG. 1, which is a schematic diagram of a two-dimensional capacitive touch sensor having a double-layered trace. The touch sensor 10 has a plurality of parent-axis wires 11 and Y-axis wires 12, each of which has a plurality of sensor contacts (sens〇r pad) 13 and a connection line μ between the sensor contacts. For any of the wires η and 12, the main contribution of the resistance is from the connection line 14, and the capacitance is the capacitance of the sensor contact 13 itself to ground. For example, suppose an ITO sheet of a certain process has a resistance value of 1 Ω per unit area, 7 units between two sensor contacts 13, and a total of 9 lines for the entire conductor. The resistance value will be 7*1〇〇*9=6300Ω' and the capacitance of each inductor contact 13 to ground can be, for example, 4pF, so the circuit model of the entire wire can be established. On the other hand, for the two-dimensional capacitive touch sensor driving signal generation and mention 2 '美@ invention patent No. 6,323, 846 claims to supply the voltage source for the power supply device, and the fifth, 920, 309 claims to use the modulator (modulator) The drive signal is provided 'and the drive signal can be a voltage source or a positive or negative direction of the fixed frequency = 疋 current source. Further, the U.S. invention patents Nos. 5, 92, and 3 are fixed-current sources in both positive and negative directions of a fixed frequency to charge and discharge the touch sensor by the formed square wave power source. However, because the resistance characteristics of ITO make the conductive characteristics less than that of metal, the touch sensor has the equivalent RC network characteristics, so that the button is severely attenuated at the end of the network (the front stage of the touch sensor), thereby making the touch Control board controller f signal system: In addition, because the square wave has high lying harmonics, the signal is seriously attenuated in the front-end touch sensor of the ΠΌ wire. Therefore, a touch sensor driving method and device capable of eliminating or slowing down signal attenuation are actually implemented by a capacitive touch module. ❹
【發明内容】 本發明的目的就是在提供—難以純或 ^調變與解調變之觸控感應器驅動方法，以消除或減= 本，_再-目的是提供—種能㈣波電流源進行調變 ，、解，變之觸控感應器驅動裝置，以消除或減緩訊號衰減。變 鱼紐2_又—目的是提供—種能㈣波電流源進行調變 與解調變之餘摘控馳，㈣除錢緩訊號衰減。 似心明提出㈣應器驅動方法，係提供可產生近 面之純或近絲波電流_電容式難輸出入介 =組;以及提供一開關模組，具有多個開關元： 點打開或關閉所分別連接之—電源供應線路，從出 、、，屯或近似弦波電流源至觸控感應器。 j出 弦波提 之一觸控感應器，此裝置包含^關=谷2控輸出入介面 以依序於各時間點打開或關閉 而輪出純紐似織錢縣路 6 201007538 用以控制開關模組。 在本發明的較佳實施例中，上述之觸控感應器可以是ΙΤ0 觸控感應器，並且具有多銦ΙΤΟ感應導線；ΙΤΟ觸控感應器可 以是一維或二維，並且二維的ΙΤΟ觸控感應器其中一維是χ 軸導線，另一維則是γ軸導線。 ❹ 本發明提出一種電容式觸控模組，包含一開關模組、一控 制裝置、一銦錫氧化物觸控感應器以及一微控制器單元。其 中，開關模組具有多個開關元件，以依序於各時間 閉所分別連接H祕躲路錢出具有近姆 -純或近㈣波m以驅動錮錫氧化細域應器；控制 裝置用以控制開關模組對銦錫氧化物觸控感應器之充放電；姻 ，氧化物觸控感應H用以提供至少—導電物體觸摸而感應電 谷變化量；健制H單元_以根據電容變化 之座標或啟麟應魏。 瓶 在本發明的較佳實施例中，控制裝置可以是一解碼器 (De曰cod亦近健波波形由多個點構成，並且開關元件數量可 點數量的一半。在另—實施例中，近似弦波波形由多 這些點的數量可以藉由純或近似弦波電流源的 ’近似弦 觸控感應謎^ 服訊號在RC網路末端的嚴重奢觸控模組，因此能夠克 信號偵測上的困難，而且相較=降低觸控板控制器在 發明因為採祕有較快穩定；波形的定電流源’本 電流源’因此_祕較多與較大尺寸的ιτ〇面板。 201007538 為讓本發明之上述和其他目的、特徵和優點能更明顯易 .丨董，下文特舉較佳實施例’並配合所附圖式，作詳細說明如下。 【實施方式】 ❹ 、清參閱圖2’其係本發明一較佳實施例之觸控感應器驅動 方法步驟流程圖。於步驟S2U，提供一控制裝置，例如— 碼器，以控制開關模組，然後於步驟S212提供一開關模纟且以 =序於各時間點打開或關_分別連接之_電源供應線路而 輸出純或近似弦波電流源至電容式觸控輸出人介面之觸 在此㈣，馳錢器可以是具有多個肋感應導^的 TO觸控感應器’並且ΙΤ〇觸控感應器可以一維或二維，或^ ^層或雙層’並且二維之ΙΊΌ觸控感絲、其卜維是χ轴 二’另-維是γ軸導線。為了模擬出近似的純弦波電流源， =些近似的弦波波形由多個點（多個時間點相對應的 ❹ 塔:例如8個時間點t0〜t7相對應值可得到8點近似弦波電产 Π ’並且開關元件數量是8點的一半，也就是4個開關二 ’點則為8個開關元件，依此類推。另外，這些點 率Si，二？弦波電流源之電路最高頻率除以弦波頻 弦波頻率ί再而純^近波電流源之電路最高頻率除以 多則近似弦波實務上’由模擬結果可知’點數愈 穿詈3閱其係本發明—較佳實施例之觸控感應器驅動 衣罝方塊不意圖。如圖3,,,,. j 動裝罟30勺人一 ^ 斤不，在此實施例中，觸控感應器驅 ，一控制裝置31以及一開關模組32,用於產峰 輪之一純或近似弦波電流源至電容式觸控 以始；丨面觸控感應器34。控娜置31可以是解石馬哭， 線路分別傳輸控制訊號給開關模組32的開關元件。開；；模 8 201007538 組32 ’用以依序於各時間點打開或關閉開關元件所分別連 之電源供躲路’從而輪出近健波電流源至觸贼應器料。 其中’觸控感應器可以是具有多個IT〇感應導線的IT〇觸控 感應器’並且ΙΤ〇觸控感應器可以-維或二維，或是單層或^ 層，二維之1T〇觸控感應器其中-維是X軸導線，另-維是 Υ軸導線為了模擬出近似的純弦波電流源，這些近似的弦 波形由多個點（多個時間點相對應的值)構成，例如8個時間點 t〇〜t7相朗值可制8點近錄波電㈣ 元 ΟSUMMARY OF THE INVENTION The object of the present invention is to provide a touch sensor driving method that is difficult to purely or modulate and demodulate, to eliminate or subtract = _, again - the purpose is to provide a kind of energy (four) wave current source Modulate, decode, and change the touch sensor drive to eliminate or slow down signal attenuation. Change fish 2 2 - again - the purpose is to provide - a kind of energy (four) wave current source for modulation and demodulation to change the control, (4) in addition to money slow signal attenuation. It seems that the (4) device-driven method provides a near-field pure or near-wave current _capacitor-type hard-to-output type; and provides a switch module with multiple switching elements: point on or off Connected separately - the power supply line, from the out, ,, or approximate sine wave current source to the touch sensor. j out of the wave touch sensor, this device contains ^ off = valley 2 control input and output interface to open or close at each time point in order to turn out the pure new line like weaving county road 6 201007538 to control the switch Module. In a preferred embodiment of the present invention, the touch sensor may be a ΙΤ0 touch sensor and have a plurality of indium-bismuth sensing wires; the ΙΤΟ touch sensor may be one-dimensional or two-dimensional, and two-dimensional ΙΤΟ One of the touch sensors is a 轴-axis wire, and the other dimension is a γ-axis wire. The present invention provides a capacitive touch module comprising a switch module, a control device, an indium tin oxide touch sensor, and a microcontroller unit. Wherein, the switch module has a plurality of switching elements, and is connected to each of the time periods to respectively connect the H secret to avoid the m-pure or near (four) wave m to drive the tin-tin oxide fine-domain device; the control device is used for The control switch module charges and discharges the indium tin oxide touch sensor; the oxide touch sensor H is used to provide at least a conductive object touch to sense the electric valley change; the health H unit _ according to the capacitance change The coordinates or Qilin should be Wei. In a preferred embodiment of the invention, the control device may be a decoder (De曰cod is also composed of a plurality of points, and the number of switching elements is half the number of points. In another embodiment, Approximate sinusoidal waveforms can be detected by the number of these points by the pure or approximate sine wave current source of the 'approximate chord touch sensing mystery signal. The signal is at the end of the RC network. Difficulty, and compared to = lowering the touchpad controller in the invention because the mining secret is faster and more stable; the waveform of the constant current source 'this current source' is therefore more secret and larger size of the ιτ〇 panel. 201007538 is The above and other objects, features, and advantages of the present invention will become more apparent and appreciated. A flowchart of the steps of the touch sensor driving method according to a preferred embodiment of the present invention. In step S2U, a control device, such as a coder, is provided to control the switch module, and then a switch module is provided in step S212. And = sequenced at each time point to turn on or off _ separately connected to the power supply line and output pure or nearly sinusoidal current source to the touch of the capacitive touch output interface (4), the money machine can have multiple rib sensing The TO touch sensor of the guide ^ and the touch sensor can be one-dimensional or two-dimensional, or ^ ^ layer or double layer ' and two-dimensional touch touch wire, its Bu Wei is the axis two 'other - Dimensions are γ-axis wires. In order to simulate an approximate pure sine wave current source, some approximate sine wave waveforms are composed of multiple points (multiple time points corresponding to the turret: for example, 8 time points t0~t7 The value can be approximated by 8 points of sine wave electric Π 'and the number of switching elements is half of 8 points, that is, 4 switching points are 8 switching elements, and so on. In addition, these point rates Si, II? The maximum frequency of the circuit of the sine wave current source is divided by the sine wave frequency sine wave frequency ί and then the pure circuit of the near-wave current source is divided by the maximum frequency of the sine wave. 'The simulation results show that the number of points is more than 詈3 It is not intended that the touch sensor of the present invention is driven by a touch sensor. Figure 3,,,,. j. The mobile device is 30 scoops. In this embodiment, the touch sensor drive, a control device 31, and a switch module 32 are used to produce one of the peaks. Or similar to the sinusoidal current source to the capacitive touch to start; the face touch sensor 34. The control set 31 can be the stone to cry, the line separately transmits the control signal to the switching element of the switch module 32. Mode 8 201007538 Group 32 'used to turn on or off the power supply connected to the switching elements in sequence at each time point for the purpose of hiding the road', so that the near-wave current source is turned to the touch thief. The 'touch sensor can It is an IT〇 touch sensor with multiple IT〇 sensing wires' and the touch sensor can be either dimensional or two-dimensional, or single-layer or layer, two-dimensional 1T-inch touch sensor. It is an X-axis wire, and the other dimension is a Υ-axis wire. To simulate an approximate pure sine wave current source, these approximate chord waveforms are composed of multiple points (corresponding values at multiple time points), for example, 8 time points t 〇~t7 phase rang value can be made 8 points near recording wave (4) yuan Ο
Q =量”點的一半’也就是4個開關元件，16點則= 弦波電流源之電路最高頻率除以弦波頻率後而決定，例如g 3頻波頻率為7聰Z，則可以用32二t 點近健波韻源波形，或是還可以藉由純或近似弦j &源之電路最高解除__率後再降㈣ =為24馳且弦波頻率為獅Hz日夺，可以降頻而^用最二 ^點錢擬近健波電麵㈣。實務上 ，Q = half of the "point" is 4 switching elements, 16 points = the maximum frequency of the circuit of the sine wave current source is divided by the sine wave frequency, for example, the g 3 frequency is 7 C, then you can use 32 2 t point near Jian wave rhyme source waveform, or can also be reduced by pure or approximate string j & source circuit __ rate and then fall (four) = 24 sine and the sine wave frequency is lion Hz day, You can reduce the frequency and use the second best money to approximate the Jianbo electric surface (4). In practice,
知’點數愈多則近似弦波的效果愈好。 顺WT 請-併參閱圖3與圖4,圖4電路圖揭露 波電流源的電路，並且假設電__最高頻料弦 弦波頻率為75GKHZ，近似振幅為懸Α，因此〇 ， 點去近似滅，也可_幻6點及8點來近 ^ 32 所示，控制裝置31藉由線路311〜314 波。如圖4 組32，對開關元件切〜似進行 、控制訊號給開關模 «^#321-324 ^ 時電路不對觸控感應器34進行充放電。=331〜334,此 元件321關閉而連接電源供應線路331，复铋Θ點tl時，開關 接電源供應線路332〜334，此時雷%、:開關打開而不連 電路以7〇.7uA對觸控感應器 201007538 進仃充電，於時間點t2時，開關元件321盥 接電源供應線路331〜332，豆 m、322關閉而連 路333〜334,㈣㈣、 關打開而不連接電源供應線 時電路以1 〇〇uA對觸控感應考34進杆奋雷. 於時間點t3時，開關亓杜工為應态料進仃充電， η 1關件關閉而連接電源供應線路33卜 連接電源供應線路332〜334，此時電路以 ^ 應器34進行充電；於時_t4時，開關元件Knowing that the more points are, the better the effect of approximating the sine wave.顺WT Please - and refer to Figure 3 and Figure 4, the circuit diagram of Figure 4 reveals the circuit of the wave current source, and assumes that the frequency of the highest frequency chord wave is 75GKHZ, and the approximate amplitude is Α, so 〇, the point is approximately extinct It is also possible to display the control device 31 by means of lines 311 to 314 waves as shown by _ magic 6 o'clock and 8 o'clock. As shown in Fig. 4, group 32, when the switching element is cut and similar, and the control signal is given to the switch mode «^#321-324 ^, the circuit does not charge and discharge the touch sensor 34. =331~334, the component 321 is closed and connected to the power supply line 331. When the reset point is t1, the switch is connected to the power supply lines 332-334. At this time, the lightning %, the switch is turned on without the circuit being 7〇.7uA. The touch sensor 201007538 is charged and charged. At time t2, the switching element 321 is connected to the power supply lines 331 to 332, the beans m and 322 are closed, and the links 333 to 334 are connected. (4) (4), when the switch is turned off and the power supply line is not connected. The circuit uses 1 〇〇uA to touch the sensor to test 34 strokes. At time t3, the switch 亓 Dugong is charging the responsive material, and the η 1 is closed and connected to the power supply line 33 to connect the power supply. Lines 332-334, at which point the circuit is charged by the processor 34; at time _t4, the switching element
/、打開而不連接電源供應線路331與334，此時電路 不對觸控感應器34進行充放電；於時間點t5時，開關元件奶 關閉而連接電源供應線路333，其餘開關㈣而不連接電源供 應線路331 332與334 ’此時電路以7〇 7uA對觸控感應器34 進行放電；於時間點t6時，開關元件321與322關閉而連接 電源供應線路331與332,其餘開關打開而不連接電源供應線 路333與334’此時電路以100uA對觸控感應器34進行放電； 於時間點t7時’開關元件323關閉而連接電源供應線路333， 其餘開關打開而不連接電源供應線路331、332與334，此時 電路以70.7uA對觸控感應器34進行放電。 承上實施例’圖5A〜5D係分別以頻率為750KHz、振幅 為100uA的方波與純弦波、8點弦波、16點弦波與32點弦波 對RC網路進行充放電以及在rc網路末端電容進行電壓模擬 量測結果之波形圖。由於可預期相較於純弦波或8點、16點、 32點弦波電流源’方波電流源在rC網路的末端具有最低的振 幅’因此我們假設方波電流源在RC網路末端的振幅為A1 ; 而純弦波或8點、16點、32點弦波電流源在RC網路末端的 振幅分別為A2、A3、A4、A5 ’觸控感應器的電阻與電容變化 分別可以下列公式獲得與比較：（Α2-Α1)/Α1*1〇〇%、 (A3-A1)/A1*100% 、 (A4-A1)/A1*100% 以 及 (A5-A1)/A1*100%。當觸控感應器的電容固定為4pF、電阻為 201007538 ❹ © 變數其範圍為0.1ΚΩ〜1.1ΚΩ以及觸控感應器電阻固定為 0.7ΚΩ、電容為變數其範圍為〇.5pF〜6pF時，可發現兩項特性: 其一，弦波穩定時間比方波快，因此弦波的掃描頻率會比方波 快；其二，在RC網路的末端，純弦波的振幅比方波多出 27·46%、8點弦波的振幅比方波多出21 57%、16點弦波的振 幅比方波多出25.83%、32點弦波的振幅比方波多出的％ 因此’本發明能夠克服訊號在此網路末端的嚴重衰減〇，° 降低觸控板控制器在信號偵測上的困難；而且能夠比提供 方波波形的定電流源具有較快穩定時間與較大振幅的弦^ 流源，從而能適用於較多與較大尺寸的IT〇面板。 請參閱圖6，其係本發明一較佳實施例之電容式觸控模扭 方塊不意圖。在此實施例中，電容式觸控模組6〇且 ' =-6^^模組/2一銦鍚氧化物帅)觸控感應器^ 以及微控制器^64。控制裝置61例如 觸控感應器63之充放電心 電源供應線路啸出具有錢波形之—純或近似 源’從而驅動ιτο觸控感應器63，ΙΤ ς 獲得導控制器單元64則根據電容變化量 付守电初體之座私或啟動對應功复 構成 後的數值所決定的數量路最南頻率除以弦波頻率 後再降頻所獲得數值決定除以弦波頻率 是2的冪次值，但眚熬 绝二點的數量理論上 好。 —務上㈣數愈多所得到的近似弦波效果愈 11 201007538 綜上所述’根據本發明所提出的觸控感應器驅動方法與裝 • 置以及電容式觸控模組，32點弦波與純弦波的模擬果近乎重 疊’因此點數愈多則近似弦波的效果愈好。進一步來看，本發 明因採用提供具有弦波波形之純或近似弦波電流源至觸控感 應器之觸控感應器驅動方法、裝置以及電容式觸控模組，因此 能夠克服訊號在RC網路末端的嚴重衰減問題，降低觸控板控 制器在信號偵測上的困難，而且能夠比提供具有方波波形的定 電流源具有較快穩定時間與較大振幅的弦波電流源。實務上， ❹ 假如原來的方波電流源驅動方式可支援到4.3英对的ITO面 板，若改以純弦波電流源進行驅動，所支援的最大IT〇面板尺 寸約為5.5英吋；若改以8點弦波電流源進行驅動，所支援的 最大ΙΤΟ面板尺寸約為5.2英吋；若改以16點弦波電流源進 行驅動，所支援的最大ΙΤ〇面板尺寸約為5 4英吋；若改以32 點弦波電流源進行驅動，所支援的最大ΙΤ〇面板尺寸約為5 5 英吋，因此本發明能夠適用於較多與較大尺寸的ΙΤ〇面板。 雖然本發明已以較佳實施例揭露如上，然其並非用以限定 ❹ 本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍 内，當可作些許之更動與潤飾，因此本發明之保護範圍當視後 附之申請專利範圍所界定者為準。 【圖式簡單說明】 圖1繪示為習知具有雙層ΙΤ〇導線的二維電容式觸控感 應器示意圖。 圖2係本發明一較佳實施例之觸控感應器驅動方法步驟 流程圖。 _圖3係本發明一較佳實施例之觸控感應器驅動裝置方塊 示意圖。 圖4係本發明一較佳實施例之觸控感應器驅動裝置電路 12/, open and not connected to the power supply lines 331 and 334, at this time the circuit does not charge and discharge the touch sensor 34; at time t5, the switching element milk is closed and connected to the power supply line 333, the remaining switches (four) without the power supply The supply lines 331 332 and 334 ' at this time the circuit discharges the touch sensor 34 at 7 〇 7 uA; at the time point t6, the switching elements 321 and 322 are closed to connect the power supply lines 331 and 332, and the remaining switches are turned on without being connected. The power supply lines 333 and 334' at this time discharge the touch sensor 34 at 100 uA; at time t7, the switching element 323 is turned off to connect the power supply line 333, and the remaining switches are turned on without connecting the power supply lines 331, 332. And 334, at this time, the circuit discharges the touch sensor 34 at 70.7 uA. According to the above embodiment, FIGS. 5A to 5D charge and discharge the RC network with a square wave and a pure sine wave, an 8-point sine wave, a 16-point sine wave and a 32-point sine wave with a frequency of 750 kHz and an amplitude of 100 uA, respectively. The waveform of the voltage analog measurement result of the rc network end capacitor. Since it can be expected that the square wave current source has the lowest amplitude at the end of the rC network compared to the pure sine wave or the 8-point, 16-point, 32-point sine wave current source, we assume that the square wave current source is at the end of the RC network. The amplitude of the pure sine wave or the 8-point, 16-point, 32-point sine wave current source at the end of the RC network is A2, A3, A4, A5. The resistance and capacitance of the touch sensor can be changed respectively. The following formulas are obtained and compared: (Α2-Α1)/Α1*1〇〇%, (A3-A1)/A1*100%, (A4-A1)/A1*100%, and (A5-A1)/A1*100 %. When the capacitance of the touch sensor is fixed at 4pF and the resistance is 201007538 ❹ © variable range is 0.1ΚΩ~1.1ΚΩ and the touch sensor resistance is fixed at 0.7ΚΩ, and the capacitance is variable in the range of 〇.5pF~6pF. Two characteristics are found: First, the sine wave stabilization time is faster than the square wave, so the scanning frequency of the sine wave is faster than the square wave; second, at the end of the RC network, the amplitude of the pure sine wave is 27.46% more than the square wave. The amplitude of the 8-point sine wave is 21 57% more than the square wave, the amplitude of the 16-point sine wave is 25.83% more than the square wave, and the amplitude of the 32-point sine wave is more than the square wave. Therefore, the present invention can overcome the serious problem of the signal at the end of the network. Attenuation 〇, ° reduces the difficulty of the touch panel controller in signal detection; and can provide a faster steady-state and larger amplitude chord source than a constant current source that provides a square wave waveform, so that it can be applied to more With larger size IT〇 panels. Please refer to FIG. 6, which is a schematic diagram of a capacitive touch mode twisted square according to a preferred embodiment of the present invention. In this embodiment, the capacitive touch module 6 and the '=-6^^ module/2 an indium oxide oxide touch sensor ^ and the microcontroller ^64. The control device 61, for example, the charge and discharge power supply line of the touch sensor 63 squirts a pure or approximate source of the money waveform to drive the ιτο touch sensor 63, and obtains the conduction controller unit 64 according to the capacitance change amount. The number of the southmost frequency divided by the sine wave frequency divided by the sine wave frequency and determined by the value of the sinusoidal frequency is determined by dividing the sine wave frequency to be a power of 2, But the number of two points is theoretically good. - The more (4) the number is obtained, the more approximate sine wave effect is obtained. 11 201007538 In summary, the touch sensor driving method and device and the capacitive touch module proposed according to the present invention, 32-point sine wave It almost overlaps with the simulated fruit of pure sine wave' so the more points there are, the better the effect of approximating the sine wave. Further, the present invention can overcome the signal in the RC network by using a touch sensor driving method, a device, and a capacitive touch module that provide a pure or nearly sinusoidal current source having a sine wave waveform to the touch sensor. The severe attenuation at the end of the road reduces the difficulty of the touch panel controller in signal detection, and can provide a sinusoidal current source with faster settling time and larger amplitude than a constant current source with a square wave waveform. In practice, 假 If the original square wave current source drive mode can support 4.3-inch pairs of ITO panels, if you switch to a pure sine wave current source, the maximum supported IT panel size is about 5.5 inches; Driven by an 8-point sine wave current source, the maximum supported panel size is approximately 5.2 inches; if driven by a 16-point sine current source, the maximum supported panel size is approximately 5 inches; Driven by a 32-point sine wave current source, the maximum ΙΤ〇 panel size supported is approximately 5 5 inches, so the present invention can be applied to a larger and larger ΙΤ〇 panel. While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and it is to be understood that the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a two-dimensional capacitive touch sensor having a double-layered ΙΤ〇 wire. 2 is a flow chart showing the steps of a method for driving a touch sensor according to a preferred embodiment of the present invention. 3 is a block diagram of a touch sensor driving device in accordance with a preferred embodiment of the present invention. 4 is a circuit diagram of a touch sensor driving device according to a preferred embodiment of the present invention.
❹ 201007538 圖。 5A〜5D係本發明較佳實施例之方 波、點弦波與32點弦波 放皮、8點弦 圖6係本發明 電之波开♦ 佳實蘭之電容式難额 【主要元件符號說明】 10、34 :觸控感應器 ll:x輛導線 12 : Y軸導線 13 :感應器接點 14 :連接線 S211〜S212 :本發明—較佳實施例之觸控感應器驅動方法各步 30 :觸控感應器驅動裝置 31、 61 :控制裝置 311〜314 :線路 32、 62 :開關模組 321〜324 :開關元件 331〜334 :電源供應線路 60:電容式觸控模組 63 :銦錫氧化物觸控感應器 64 :微控制器單元 t0〜t7 :時間點0〜7 A1〜A5 :振幅❹ 201007538 Picture. 5A~5D is a square wave, a point sine wave, a 32-point sine wave, and an 8-point chord diagram according to a preferred embodiment of the present invention. The invention is an electric wave of the present invention. Description] 10, 34: touch sensor ll: x conductor 12: Y-axis conductor 13: sensor contact 14: connection line S211 ~ S212: the present invention - preferred embodiment of the touch sensor driving method steps 30: touch sensor driving device 31, 61: control devices 311 to 314: lines 32, 62: switch modules 321 to 324: switching elements 331 to 334: power supply line 60: capacitive touch module 63: indium Tin oxide touch sensor 64: Microcontroller unit t0~t7: time point 0~7 A1~A5: amplitude