201128197 in v i-^u09-119 33071twf.doc/n 六、發明說明： 【發明所屬之技術領域】 本發明是有關於-種感測裝置與觸控感測系統 別是有關於-種電容感測裝置及應用電容 ^ 感測純。 抑概置的觸控 【先前技術】 目前，觸控面板大致可區分為電阻式、 線式及超音波式等觸控面板，其中以電阻式觸外 容式觸控面板為最常見的產品。而相較於^板j 板只需藉_碰或是歸便能_使用者_作’=面 觸控面板是利用偵測感測線上的容值變： 木取侍早點或兩點以上之觸控資訊。 前，二旦在I習知技藝中’於量測待測電容的容值變化 line)二，讀Ϊ制電容的容值以作為基準值（base 取得翻=再把實際制_制電容㈣去基底以 用以感測錄化’其巾#制物的基底很大時， 手勢的速度會Ϊ慢所需的時間也會增加，亦即_使用者 【發明内容】 放雷t明提供—種電容❹懷置，其可雜制電容的 ，進而提升電容感測裝置的感測敏銳度。 201128197 ιί ν Α-^υ09-119 33071twf.doc/n 其包括上述之電容感 進而提升觸控感測系 本發明提供一種觸控感測系統， 測裝置以調整待測電容的放電逮率， 統的感測敏銳度。 本發明提出-種電容感測襄置，其包括待測 即式放電單元以及信號感測單元。 調 測電容。信號感測單元娜寺測電柄接待 考信號與待測電容的待測信號出 即式，電單元依據輪出信號調整待測電容的放電速率。- 梦。在本發明之—實施财，上叙參相號為直流信 在本發明之-實施例中，上述之 权 :變，且。可變電阻具有第，待側電容=包: 耦接放電電位。 及第一端 在本發明之—實施例中，上述之 括開關單元。卩·ϋ減隸w λ ι早几更包 ⑽早TL減於仙電額可變電阻之 、— 本么明之—實施例中，上述之調節式放電單亓勺扭 複數個電阻以及選擇單元。選擇 匕 述電阻之間，並依攄：二接於待測電容與上 少其中之—^據輸 使仙電容與上述電阻的至 在本發明之一實施例中，上述每一 選擇箪亓，0> 咏 電阻的第一端耦接 k擇早7〇 ’且母—電阻的第二端_放電電位。 在本發明之一實施例中，上述之調 可變電流源。 化卩纽t早兀包括 在本發明之-實施射’上叙參考錢為交流信 201128197 in ν ι-ζυ09-119 33071twf.doc/n 號，且調節式放電單元包括開關單元。其中開關單元 -端搞接待測電容’且開關單元的第二端耦接放電電位。 。。在本發明之-實施例中，上述之信號感測單元為 器。 另一方面，本發明還提出—種觸控感測系統，其包括 -輸入介面以及上述之電容感測裝置，其中電容感測裝 轉接輸入介面。 • f本發明之—實施例中，上述之觸控感測系統更包括 開關單7G。開關單元祕於輸人介面與電減雕置之間。 基於上述，在本發明之實施例中，由於調節式放電 元適於調整待測電容的放電速率，故本實施例的電容 裝置與觸控m統具有較佳的感測敏銳度。 為讓本發明之上述特徵和優點能更明顯易懂，下文特 舉實施例，並配合騎圖式作詳細說明如下。 【實施方式】 圖1 1會示為本發明一實施例的觸控感測系統100。枝 參照圖1 ’觸控感測系㈣0包括輸入介面110以及^ 感剥裝置12G。電容感測裝置12_接輸人介面11〇， 收輸入介面m的輪人信號s卜在本實施例中，輸入介面 ’㈣是觸_示器的觸控面板、具有觸控面板的可掉 f電子裝置或是其他具觸控感測功能的觸摸板。而輸入^ 號S1例如是因為觸控物體13〇 (例如手指）接觸 ς 入介面110而產生。 卻 201128197 9.119 3307itwfd〇c/n 請繼續參照圖1 ’電容感測裝置U0包括待測電容 122、調節式放電單元124以及信號感測單元126。調節式 放電單元124耦接待測電容122，且適於對待測電容 所儲存的電荷進行放電。另外，信號感測單元126耦接待 測電容122與調節式放電單元124，並依據參考信號Sref 與待測電容122的待測信號S2產生輸出信號s〇u/除此 之外，本實施例的調節式放電單元124可依據輸出信號 Sout來調整待測電容122的放電速率。 & 如圖1所示，本實施例的觸控感測系統丨〇〇還包括開 關單元140。開關單元140耦接於輸入介面11〇與電容咸 測裝置之間120。當開關單元14〇導通時（閉路），來自 輸入介面11〇的輸入信號si適於透過開關單元14〇傳遞 至電容感測裝置120,並影響待測電容122兩端的跨壓201128197 in v i-^u09-119 33071twf.doc/n VI. Description of the Invention: [Technical Field] The present invention relates to a sensing device and a touch sensing system. Measuring device and application capacitor ^ sensing pure. The touch panel can be roughly divided into resistive, line and ultrasonic touch panels. Among them, the resistive touch panel is the most common product. Compared with the ^ board j board, you only need to borrow or touch the _ user _ for the '= surface touch panel is to use the detection of the value of the sense line changes: wood pick up early or more than two points Touch information. Before, in the I-known skill, 'measuring the capacitance change line of the capacitor to be tested.' Second, read the capacitance of the tantalum capacitor as the reference value (base to get the flip = then the actual system _ capacitor (four) go When the substrate is used to sense the recording of the 'the towel', the time required for the gesture to slow down is also increased, that is, the user's content is invented. Capacitor ❹ ,, which can make capacitors, and thus improve the sensing acuity of the capacitive sensing device. 201128197 ιί ν Α-^υ09-119 33071twf.doc/n It includes the above capacitive sense to enhance touch sensing The present invention provides a touch sensing system for measuring a discharge rate of a capacitor to be tested and a sensing acuity. The present invention provides a capacitive sensing device including a discharge cell to be tested and Signal sensing unit. Measure the capacitance. The signal sensing unit Na Temple's test handle and the signal to be tested are outputted, and the electric unit adjusts the discharge rate of the capacitor to be tested according to the turn-off signal. In the invention - the implementation of the financial, the upper phase of the phase is DC In the embodiment of the present invention, the above-mentioned weights are changed, and the variable resistor has a first, a side capacitance = a package: a coupling discharge potential, and a first end in the embodiment of the present invention, Switching unit. 卩·ϋ 隶 w w λ ι early several packs (10) early TL minus the singularity of the variable resistance, - this is the case - in the embodiment, the above-mentioned adjustable discharge single 亓 spoon twisted a plurality of resistors and Selecting a unit, selecting between the description resistors, and relying on: the second connection to the capacitor to be tested and the lower one of the capacitors and the resistors are in the embodiment of the present invention, each of the above options箪亓, 0 0&; 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 且 且 第一 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且 且Newt is included in the present invention - the implementation of the reference to the reference money for the exchange letter 201128197 in ν ι-ζυ 09-119 33071twf.doc / n, and the adjustable discharge unit includes a switch unit. The receiving capacitance is measured and the second end of the switching unit is coupled to the discharge potential. In the embodiment of the present invention, the signal sensing unit is a device. In another aspect, the present invention further provides a touch sensing system including an input interface and the above capacitive sensing device, wherein the capacitive sensing In the embodiment of the present invention, the touch sensing system further includes a switch single 7G. The switch unit is secret between the input interface and the electric reduction engraving. Based on the above, in the present In the embodiment of the invention, since the adjustable discharge cell is adapted to adjust the discharge rate of the capacitor to be tested, the capacitive device and the touch sensor of the embodiment have better sensing acuity. The advantages can be more clearly understood, and the following specific embodiments are described below in conjunction with the riding pattern. Embodiment 1 FIG. 11 shows a touch sensing system 100 according to an embodiment of the present invention. Referring to Figure 1, the touch sensing system (4) 0 includes an input interface 110 and a peeling device 12G. The capacitive sensing device 12_ receives the human interface 11〇, and receives the wheel signal s of the input interface m. In the embodiment, the input interface '(4) is a touch panel of the touch device, and the touch panel can be omitted. f electronic device or other touchpad with touch sensing function. The input number S1 is generated, for example, because the touch object 13 (e.g., a finger) contacts the intrusion interface 110. However, 201128197 9.119 3307itwfd〇c/n Please continue to refer to FIG. 1 'The capacitive sensing device U0 includes a capacitor 122 to be tested, an adjustable discharge unit 124, and a signal sensing unit 126. The regulated discharge unit 124 is coupled to the measurement capacitor 122 and is adapted to discharge the charge stored in the capacitor to be measured. In addition, the signal sensing unit 126 is coupled to the measuring capacitor 122 and the regulating discharge unit 124, and generates an output signal s〇u/ according to the reference signal Sref and the signal S2 to be tested of the capacitor 122 to be tested, in addition to the present embodiment. The regulated discharge unit 124 can adjust the discharge rate of the capacitor 122 to be tested according to the output signal Sout. As shown in FIG. 1, the touch sensing system of the present embodiment further includes a switching unit 140. The switch unit 140 is coupled between the input interface 11 and the capacitance sensing device 120. When the switching unit 14 is turned on (closed), the input signal si from the input interface 11 is adapted to be transmitted to the capacitive sensing device 120 through the switching unit 14 and affects the voltage across the capacitor 122 to be tested.
Vc。換句話說’對應跨壓Vc的待測信號幻便會受到影響， 進而產生對應不同狀態的輸出信號s 〇 u t。 曰 圖2繪不為圖1之觸控感測系統1〇〇的一實施樣態。 请參照圖2，在本實施樣態中，觸控感測系統2〇〇的信號 感測單tl 226例如為一比較器。比較器226接收參考信號 Sref與待測信號S2，並比較參考信號與待測信號幻 以輸出輸出信號S〇ut。其中參考信號Sref例如是由直流信 號源Vref所^供的直流彳§號，且輸出信號s〇ut例如代表 直流彳§號與待測信號S2的比較結果。另外，在其他實施 樣悲中，感測單元226也可以是積分器或差動放大器。 如圖2所示，本實施樣態的調節式放電單元224包括 201128197 N V i-^u09-119 33071twf.doc/n 可變電阻VR以及開關單元224a。 140與開關單元224a未導通前「鬥牧、β ^ _ 守碾刖Q開路），待測電容122内 曰主存有電荷，並於制電容122的兩端形耕壓％。在此 '!·月況下，信號感測單元226所輸出的輸出信號SQut例如 邏輯高準位或邏輯低準位的比較信號。 接著’ g觸控物體13〇觸碰或接近輸入介面11〇且開 關單元140為閉路時，電容感測裝置220適於感測到來自Vc. In other words, the signal to be tested corresponding to the cross-voltage Vc is affected, and an output signal s 〇 u t corresponding to a different state is generated. FIG. 2 depicts an embodiment of the touch sensing system 1 of FIG. Referring to FIG. 2, in the embodiment, the signal sensing unit t12 of the touch sensing system 2 is, for example, a comparator. The comparator 226 receives the reference signal Sref and the signal to be tested S2, and compares the reference signal with the signal to be tested to output an output signal S〇ut. The reference signal Sref is, for example, a DC 彳 § number supplied by the DC signal source Vref, and the output signal s〇ut represents, for example, a comparison result between the DC 彳 § and the signal S2 to be tested. Additionally, in other implementations, sensing unit 226 can also be an integrator or a differential amplifier. As shown in FIG. 2, the regulated discharge unit 224 of the present embodiment includes a 201128197 N V i-^u09-119 33071 twf.doc/n variable resistor VR and a switching unit 224a. Before the switch unit 224a and the switch unit 224a are not turned on, "the bucket, the β ^ _ 守 刖 刖 Q open circuit", the capacitor 122 to be tested has a charge in the main 曰, and the shape of the capacitor 122 is clamped at the ends of the capacitor 122. Here! In the monthly condition, the output signal SQut output by the signal sensing unit 226 is, for example, a comparison signal of a logic high level or a logic low level. Then the 'g touch object 13 〇 touches or approaches the input interface 11 开关 and the switch unit 140 When closed, the capacitive sensing device 220 is adapted to sense from
輸入介面的輸人信號S卜而在本實施樣態中，輸入信號 S1例如為觸控減13()的電紐。如此—來，原本儲存在b 待測電谷122的電荷將會被重新分配，進而使跨壓發 生變化而形成待測信號S2。詳細來說，當電荷重新分配 後跨壓Vc會下降或上升，進而使得信號感測單元挪 在比較參考信號Sref與待測信號S2後會輸出另一狀態的 輸出信號Sout，例如為邏輯低準位或邏輯高準位的比較信 號。 " 然而，當待測電容122的電容值遠大於觸控物體u〇 的電容值時，會使得待測電容122的跨壓Vc變化不大而 難以被分辨，進而使觸控感測系統2〇〇偵測不到觸控物體 130的接近。換句話說，在此情況下，不管有無觸控物體 130接近觸控感測系統2〇〇，待測信號幻的狀態幾乎不會 =變。也就是說，信號感測單元226根本感測不到電容值 變化。如此一來，信號感測單元226必需花更多的時間來 偵測待測信號S2的變化，或是造成輸出信號s〇m之狀態 不文觸控事件的發生所影響。也就是說，信號感測單元2 2 6 201128197 i、v ι-ζυ〇9-119 33071twf.doc/n 根本感測不到觸控物體13〇的接近或觸控事件的發生。 為了避免上述問題的發生，本實施例便採用調節式放 電單元224來加速待測電容122的放電速率。如此一來， 待測電容122的電荷便會經由調節式放電單元224被部分 釋放，而使得待測電容122的跨壓Vc變化更為明顯。也 就是說，信號感測單元226便較易偵測到感測信號S2與 參考信號Sref的差異。 ’、 除此之外，在本實施樣態中，調節式放電單元224的 可金電阻VR適於依據輸出信號g〇ut調整待測電容I”的 放電速率。舉例而言，當待測電容122的電容值（基底） 太大而使得輸出信號Smit的狀態一直都未出現明顯改變 時（也就是信號感測單元126不夠敏感時），便能藉由降 低可變電阻VR的電阻值來增加待測電容122的放電速 率。如此一來，由於待測電容122多了放電路徑來釋放儲 存電荷，以使跨壓Ve產生較顯著的變化，故信號感測單 元126能輕易感測到待測信號S2的變化，進而輸出 的輸出信號Sout。 ~ 另一方面，於其他實施例中，調節式放電單元還 可對待測電容122進行兩段式放電。詳細來說，當待測電 容122的電容值很大時，調節式放電單元224先將可變電 阻VR調小以快速釋放待測電容122的部份電荷。接著， 再將可變電阻VR的電阻值調大。如此—來 置220的偵測速度便可獲得提升並維持高解析度。…裝 當然’在其他實施樣態中’調節式玫電單元a4也可 201128197 1NV1-ZU09-119 33071twf.doc/n 以=包括_單元咖。也就是說，在其他實施樣態中， 調節式放電單元224可透過調整可變電阻VR的電阻值達 到類似開關單元224a的功效。舉例而言，轉由將可變雷 vR的電阻值調至無限大，以形成類似開關單元22如二 路狀心其中電阻值之無限大的概念是相對於電路中其他 凡件的電阻值而言。整體來說，藉由調整可變電阻VR的 電阻值，調節式放電單元224能夠配合待蜊電容122的電 鲁 容值（基底）提供待測電容122適當的放電速率，進而二 加電容感測裝置220的感測敏銳度。 " 圖3繪示為圖丨之觸控感測系統1〇〇的另一實施樣 如圖3所示，在本實施樣態中，觸控感測系統3〇〇的 信號感測單元326用以接收參考信號Sref與待測信號S2, 並比較參考信號Sref與待測信號S2以輸出輸°出信號 Sout。其中參考信號Sref例如是由直流信號源所提供 的直流彳§號，且輸出信號Sout例如代表直流信號與待測信 唬S2的比較結果。本實施例的信號感測單元326例如為 參 比較器，然而在其他實施樣態中，感測單元326也可以是 積分器或差動放大器。 另外，本實施樣態的調節式放電單元324包括複數個 電阻R1與R2 (圖3僅示意地繪示兩個）以及選擇單元 324a。選擇單元324a耗接於待測電容122與電阻ri與R2 之間，並依據輸出信號Sout使待側電容122盥電阻幻與 R2的至少其中之一麵接。如3所*，每一電阻的第一端 輕接選擇料324a，且每-電阻㈣1 _ 201128197The input signal Sb of the input interface is in the embodiment, and the input signal S1 is, for example, a touch minus 13 (). In this way, the charge originally stored in the b-test valley 122 will be redistributed, and the voltage across the voltage will change to form the signal S2 to be tested. In detail, when the charge is redistributed, the voltage across the voltage Vc may drop or rise, so that the signal sensing unit moves the comparison reference signal Sref and the signal to be tested S2 to output an output signal Sout of another state, for example, a logic low level. Bit or logic high level comparison signal. " However, when the capacitance value of the capacitor 122 to be tested is much larger than the capacitance value of the touch object u〇, the voltage Vc of the capacitor 122 to be tested does not change much and is difficult to be resolved, thereby making the touch sensing system 2 〇〇 The proximity of the touch object 130 is not detected. In other words, in this case, regardless of whether or not the touch object 130 is in proximity to the touch sensing system 2, the state of the signal to be tested is hardly changed. That is to say, the signal sensing unit 226 does not sense the change in the capacitance value at all. As a result, the signal sensing unit 226 must spend more time detecting the change of the signal S2 to be tested, or causing the state of the output signal s〇m to be affected by the occurrence of the touch event. That is to say, the signal sensing unit 2 2 6 201128197 i, v ι-ζυ〇9-119 33071twf.doc/n does not sense the proximity of the touch object 13〇 or the occurrence of a touch event. In order to avoid the above problem, the present embodiment uses the regulated discharge unit 224 to accelerate the discharge rate of the capacitor 122 to be tested. As a result, the charge of the capacitor 122 to be tested is partially released via the regulated discharge unit 224, so that the change in the voltage Vc of the capacitor 122 to be tested is more pronounced. That is to say, the signal sensing unit 226 can more easily detect the difference between the sensing signal S2 and the reference signal Sref. In addition, in the present embodiment, the gold-resistance VR of the regulated discharge cell 224 is adapted to adjust the discharge rate of the capacitor I" to be tested according to the output signal g〇ut. For example, when the capacitor to be tested When the capacitance value (base) of 122 is too large and the state of the output signal Smit has not changed significantly (that is, when the signal sensing unit 126 is not sensitive enough), it can be increased by lowering the resistance value of the variable resistor VR. The discharge rate of the capacitor 122 to be tested. In this way, since the capacitor 122 to be tested has more discharge paths to release the stored charge, so that the voltage across the voltage Ve changes significantly, the signal sensing unit 126 can easily sense the test. The change of the signal S2, and thus the output signal Sout. ~ On the other hand, in other embodiments, the regulated discharge unit can also perform two-stage discharge of the capacitor 122 to be measured. In detail, when the capacitance of the capacitor 122 to be tested When the value is large, the adjustable discharge unit 224 first reduces the variable resistor VR to quickly release a part of the charge of the capacitor 122 to be tested. Then, the resistance value of the variable resistor VR is increased. The measurement speed can be improved and maintain high resolution.... Of course, 'in other implementations', the adjustment type rose unit a4 can also be 201128197 1NV1-ZU09-119 33071twf.doc/n to include _ unit coffee. That is to say, in other implementations, the regulated discharge unit 224 can adjust the resistance value of the variable resistor VR to achieve the same function as the switch unit 224a. For example, by changing the resistance value of the variable lightning vR to infinity Large to form a similar switching unit 22 such as a two-way center, wherein the concept of infinite value of the resistance value is relative to the resistance value of other parts of the circuit. Overall, by adjusting the resistance value of the variable resistor VR, The accommodating discharge unit 224 can provide an appropriate discharge rate of the capacitor 122 to be tested in accordance with the electrical capacitance value (base) of the capacitor to be tested 122, and then the sensing acuity of the capacitance sensing device 220. Another embodiment of the touch sensing system 1A of FIG. 3 is shown in FIG. 3. In this embodiment, the signal sensing unit 326 of the touch sensing system 3 is configured to receive the reference signal Sref and Signal S2 to be tested, and compare parameters The signal Sref and the signal to be tested S2 are output to output the signal Sout, wherein the reference signal Sref is, for example, a DC 彳 § provided by the DC signal source, and the output signal Sout represents, for example, a comparison result of the DC signal and the signal S1 to be tested. The signal sensing unit 326 of the present embodiment is, for example, a reference comparator. However, in other implementations, the sensing unit 326 may also be an integrator or a differential amplifier. In addition, the regulated discharge unit 324 of this embodiment. The circuit includes a plurality of resistors R1 and R2 (only two are schematically shown in FIG. 3) and a selection unit 324a. The selection unit 324a is connected between the capacitor 122 to be tested and the resistors ri and R2, and the capacitor is to be replaced according to the output signal Sout. The 122 盥 resistor is connected to at least one of the R2. Such as 3 *, the first end of each resistor is lightly connected to the material 324a, and each - resistance (four) 1 _ 201128197
與圖2之觸控❹縣統的運 放電雷^{立f你丨Jfn A Xa· I ·.、 態中， 容122 同（例：《0 —八一小）〇With the touch of the ❹ ❹ 的 的 ^ ^ ^ { { { 丨 丨 丨 丨 f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f f
欲。力一万Λ，在本實施樣態中，選擇單元324a例如是以 開關的形式來實現，然而在其他實施樣態中，選擇單元 324a也可湘多工器的方式來實現，並不受限於圖3。 圖4繪示為圖丨之觸控感測系统1〇〇的另一實施樣 態。。如圖:所示，在本實施樣態中，觸控感測系統4〇〇的 k號感測單元426用以接收參考信號Sref與待測信號幻， 並比較參考信號Sref與待測信號S2以輸出輸出信號 Som。其中參考信號Sref例如是由直流信號源Vref所提供 的直流信號，且輸出信號Sout例如代表直流信號與待測信 唬S2的比較結果。除此之外，本實施例的信號感測單元 426例如為比較器，然而在其他實施樣態中，感測單元426 也可以是積分器或差動放大器。 另外，本實施樣態的調節式放電單元424包括可變電 201128197 NVT-2009-119 33071twf.doc/n 流源Ir。與圖2之觸控感測系統2〇〇的運作原理類似，當 圖4中的制電容122具有較大電雜時，調節式放電i 兀424適於調高可變電流源虹的電流值，使待測電容i22 的電荷能以較大的電流進行放電，進而提升待測電容122 的放電速率。如此-來，電容感測裝置42〇便能感測到跨 壓Vc的變化’從而使得觸控感測系统_對於觸控事件 的發生更為敏感。另-方面，調節式放電單元424也 變電流社的電流值，以提升觸控感測 的 解析度。 除此之外’在另-實施樣態中， 耦接於待測電容122和可變電流源；=want. In the embodiment, the selection unit 324a is implemented in the form of a switch, for example, in other embodiments, the selection unit 324a can also be implemented in the manner of a multiplexer, and is not limited. In Figure 3. FIG. 4 illustrates another embodiment of the touch sensing system 1A of FIG. . As shown in the figure, in the embodiment, the k sensing unit 426 of the touch sensing system 4 is configured to receive the reference signal Sref and the signal to be tested, and compare the reference signal Sref with the signal to be tested S2. To output the output signal Som. The reference signal Sref is, for example, a direct current signal supplied from a direct current signal source Vref, and the output signal Sout represents, for example, a comparison result of the direct current signal and the signal to be tested S2. In addition, the signal sensing unit 426 of the present embodiment is, for example, a comparator. However, in other implementations, the sensing unit 426 may also be an integrator or a differential amplifier. In addition, the regulated discharge unit 424 of the present embodiment includes a variable power 201128197 NVT-2009-119 33071twf.doc/n flow source Ir. Similar to the operation principle of the touch sensing system 2〇〇 of FIG. 2, when the capacitor 122 in FIG. 4 has a large electrical noise, the regulated discharge i 424 is adapted to increase the current value of the variable current source rainbow. The charge of the capacitor to be tested i22 can be discharged with a larger current, thereby increasing the discharge rate of the capacitor 122 to be tested. As such, the capacitive sensing device 42 can sense the change in cross-over voltage Vc such that the touch sensing system is more sensitive to the occurrence of touch events. On the other hand, the regulated discharge unit 424 also changes the current value of the current to improve the resolution of the touch sensing. In addition, in another embodiment, coupled to the capacitor 122 to be tested and a variable current source;
Si i關*元的功能與圖2的開關單元224a ，似，即备调即式放電單元424錢行放電功 早元適於將待測電容122與可變 】 •=:變;=Ir的電流值達到類似開關==透 舉例而s，耩由將可彎電流源犴的 達到開關單元(例如圖2的開關單元更能 態。如圖5所示，在本竇絲婵#& 叼为只施松 信號感測單元526用以接收^; J控感測系統500的 並比較參考信號Sref與待測时與待測信號S2,The function of the Si i switch element is similar to that of the switch unit 224a of FIG. 2, that is, the standby discharge type unit 424 is suitable for changing the capacitance to be tested 122 and variable] ==: The current value reaches a similar switch == through the example s, 耩 by the bendable current source 犴 reaches the switch unit (for example, the switch unit of Figure 2 is more energy state. As shown in Figure 5, in this sinus wire &#& 叼The signal-only sensing unit 526 is configured to receive and compare the reference signal Sref with the signal to be tested and the signal to be tested S2.
Sont，其中輸出信號Sout例如代表^輸出輪出信號 '^考t ?虎Sref與待測信 201128197 NVT-2009-119 33071twf.doc/n 號S2的比較結果。 另一方面，在本實施樣態中，參考信號Sref例如為交 流信號源AC所提供的交流信號。交流信號源AC適於隨 時間的改變送出不同的電壓準位給信號感測單元526，且 交流信號可以為三角波、鋸齒波或任意波形。除此之外， 本貝施樣態的k號感測單元326例如為比較器，然而在其 ，實施樣態中，感測單元326也可以是積分器或差動放^ 器。Sont, wherein the output signal Sout represents, for example, the comparison result of the output round-out signal '^考t? Tiger Sref and the letter to be tested 201128197 NVT-2009-119 33071twf.doc/n No. S2. On the other hand, in the present embodiment, the reference signal Sref is, for example, an alternating current signal supplied from the AC signal source AC. The AC signal source AC is adapted to send different voltage levels to the signal sensing unit 526 over time, and the AC signal can be a triangular wave, a sawtooth wave or an arbitrary waveform. In addition, the k-th sense unit 326 of the present embodiment is, for example, a comparator, however, in its embodiment, the sensing unit 326 may also be an integrator or a differential amplifier.
”丨小，个I她稼悲的調節式放電單元52z 包括開關單兀524a。開關單元524a輕接於待測電容12: 位（例如接地電位）之間，並依據輸出信號^ 吏待側電谷122與放電電位電性連接。詳細而言，開 :二第；咖細寺側電容122，且開關單元52知 將44耦接放電電位。換句話說，當開關單元524a 52H電容1Ϊ2與放電電位電性連接時，調節式放電單元 適於釋放待測電容122的邻份★ # /丨小, I, her sorrowful regulated discharge unit 52z includes a switch unit 524a. The switch unit 524a is lightly connected between the capacitor 12: bit (for example, ground potential) and is based on the output signal ^ The valley 122 is electrically connected to the discharge potential. Specifically, it is opened: two; the temple is 122, and the switch unit 52 knows that 44 is coupled to the discharge potential. In other words, when the switch unit 524a 52H has a capacitance of 1 Ϊ 2 and discharges When the potential is electrically connected, the adjustable discharge unit is adapted to release the neighbor of the capacitor 122 to be tested.
進而增大待測電容122 w事;==5的電流 與變:二:，^ 系統，能判斷當下是否有•觸控感測 “上所述，在本發明之實 兀適於依據輸出信號或待測電 式放電早 放電逑率，故電容感j 整待測電容的 戈電塵的變化，進而提升觸控感測系統對於觸控 12 201128197 nvi-,u09-119 33071twf.d〇c/n 事件發生的敏銳度β 雖然本發明已以實施例揭露如上，然其並非用以限定 本發明’任何所屬技術領域中具有通常知識者，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，故本 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】 Φ 圖1緣示為本發明一實施例的觸控感測系統。 圖2繪示為圖1之觸控感測系統的一實施樣態。 圖3繪示為圖1之觸控感測系統的另一實施樣態。 圖4繪示為圖1之觸控感測系統的另一實施樣態。 圖5繪示為圖1之觸控感測系統的另一實施樣態。 【主要元件符號說明】 1〇〇、200、300、400、500:觸控感測系統 110 ·輸入介面 鲁 120、220、320、420、520 :電容感測裝置 122 :待測電容 124、224、324、424、524 :調節式放電單元 126、226、326、426、526 :信號感測單元 130 :觸控物體 140、224a、524a :開關單元 324a :選擇單元 AC *父流信號源 13 201128197 iM v i-zm)9-119 33071twf.doc/n I :電流Further increase the capacitance of the capacitor to be tested 122; ==5 current and change: two:, ^ system, can determine whether there is a current touch sensing "described above, in the actual implementation of the present invention is adapted to the output signal Or the electrical discharge to be measured early discharge rate, so the capacitance sense j the change of the electrical dust to be measured, and then improve the touch sensing system for the touch 12 201128197 nvi-, u09-119 33071twf.d〇c/ The abruptness of the occurrence of the event of the present invention. The present invention has been disclosed in the above embodiments, and is not intended to limit the invention to the ordinary skill of the art, without departing from the spirit and scope of the invention. The scope of protection of the present invention is defined by the scope of the appended claims. [FIG. 1] FIG. 1 illustrates a touch sensing system according to an embodiment of the present invention. 2 is a view showing an embodiment of the touch sensing system of FIG. 1. FIG. 3 is a view showing another embodiment of the touch sensing system of FIG. 1. FIG. Another embodiment of the measurement system. Figure 5 is a diagram of another touch sensing system of Figure 1. [Principal component symbol description] 1〇〇, 200, 300, 400, 500: touch sensing system 110 · Input interface Lu 120, 220, 320, 420, 520: Capacitive sensing device 122: to be tested Capacitors 124, 224, 324, 424, 524: regulated discharge cells 126, 226, 326, 426, 526: signal sensing unit 130: touch objects 140, 224a, 524a: switch unit 324a: selection unit AC * parent flow Signal source 13 201128197 iM v i-zm) 9-119 33071twf.doc/n I : current
Ir :可變電流源 R1、R2 :電阻 51 :輸入信號 52 :待測信號 Sref :參考信號 Sout :輸出信號 TM1、TM3 :第一端 TM2、TM4 :第二端 Vref:直流信號源 VR :可變電阻 14Ir: variable current source R1, R2: resistor 51: input signal 52: signal to be tested Sref: reference signal Sout: output signal TM1, TM3: first terminal TM2, TM4: second terminal Vref: DC signal source VR: Variable resistance 14