M366125 五、新型說明： 【新型所屬之技術領域】 本創作係為一種電容觸控感刿裝置，特別是關於一種具有多 觸控點觸控❹樣置，可解_散電«題，_提高觸控靈敏 度的電容式觸控感測裝置。 【先前技術】 如圖一所示係為目前習知的電容式觸控感測裝置電路方塊M366125 V. New description: [New technology field] This creation is a kind of capacitive touch sensing device, especially for a touch-sensitive device with multiple touch points, which can solve the problem of _ _ _ Capacitive touch sensing device with touch sensitivity. [Prior Art] As shown in FIG. 1 , it is a conventional capacitive touch sensing device circuit block.
圖，係由一驅動電路100、„聱 A 等效電谷觸控板200、一感測單元The figure is composed of a driving circuit 100, a 聱 A equivalent electric valley touch panel 200, a sensing unit
3〇〇及-微處理器働所組成，而該等效電容觸控板細上佈設 有複數組感測按鍵逝，每—感測按鍵係、由兩組圖形化的導 體在觸控板的空間上分離而形成等效電容，常見的感測按鍵 观圖形化導體有如圖二A的螺旋形、圖二B的梳型或圖二C 的蛇型等等，而該感測按鍵2〇2之兩組導體分別連接成一驅動線 201A及一感測線201B。 其中該驅動電路1〇〇係連接複數組該驅動線2〇1A至該等效 電容觸控板200’而該感測單元300亦連接複數組該感測線2〇ib 至該等效電容觸控板200,該微處理器則連接該驅動電路1〇〇及 該感測單元300。 該微處理器400會經由驅動電路依序送出一連串的脈波信 至每一組感測按鍵202的驅動線201A上，因此該感測按鍵2〇2 所相對應之感測線201B會感應出一連串相對應的電荷能量，該 感測單元300即會逐一將該些相對應的電荷能量暫存累積在一 3 M366125 積分器301中，再藉由一放大器302將電位放大後，經過一類比 數位轉換器303將該些電荷能量轉換成數位信號後存入一計數 器304中形成觸控信號，最後由該微處理器400逐一讀取每一組 感測按鍵202所形成之觸控信號，分析比較後判斷出有某一組或 某些組的感測按測遭觸碰。 由上述習知電容式觸控感測裝置之電路原理可知，其主要是 感測觸控板上每一組等效電容的電荷能量的變化，然而受到觸控 板在製作過程中會因電路板材的厚度與感測按鍵的型式大小不 同，或是實際的配線規劃需求，造成每一組感測按鍵所看到的雜 散電容值往往會大於感測按鍵的等效電容值，因此當觸控板上所 佈設的感測按鍵數目愈多時，感測按鍵的尺寸也隨之縮小，造成 感測按鍵的等效電容值就更小，相對感測按鍵所得到的雜散電容 值更大於感測按鍵的等效電容值。 目前業界遇到上述觸控板感測按鍵的雜散電容值大於等效 電容值的問題，會將每一次感測按鍵所耦合的電荷能量暫存至積 分器累積時，均需先和雜散電容分享藉以抵銷雜散電容值，造成 積分器只能累積到少部份的由感測按鍵所產生的電荷能量，因此 會增加觸控信號判斷上的難度，亦因此必須設計有放大器來對積 分器的信號做放大而增加感測電路的複雜度。 有鑑於此，本案創作人針對上述習知電容式觸控板的缺失， 特在電路中增加一電壓回饋單元，以解決感測按鍵等效電容所耦 合到電荷能量需被較大雜散電容分享的問題，使真正感測按鍵所 M366125 感測電荷能量可被感測單元完全擁取，進而增加靈敏度，可不需 設計訊號放大器，以簡化感測單元的電路結構。 【新型内容】 本創作之主要目的係在於提供―種電容式觸控感測裝置，可 解決感測按鍵等效電容所麵合到電荷能量需被較大雜散電容分 ”享，造成增加觸控信號判斷難度的問題。 ' 為料上述目的’本創作之主要技術特徵係在於提供-種電 Φ容式觸控感測裝置’包括一觸控板其上佈設複數感測按鍵組成之 觸控矩陣，每-組感測按鍵係由—驅動線及—感測線形成一組等 效電容器;一驅動單元電連接該觸控板上之該些感測按鍵的驅動 線’可產生-連續脈波信號逐一傳送至任一組感測按鍵之驅動 線，使得相對應之感測線上輕合感應出—電荷電壓；_感測單元 電連接該觸控板之該些感測線，可擷取該些感測線上所耗合感應 出的電荷電壓，並將其累積後產生—觸控信號；以及—電壓回饋 祕丨元電連接於該些感測線與該感測單元之間，在下—脈波信號 前’回饋前-脈波信號時感測單元所產生之電荷電壓至感測線 端’預充感測按鍵周遭的雜散電容至積分器電位以抵銷雜散電容 的電荷分享效應，待下-連續脈波信號時’感測單元所輕合感應 之電荷電壓即能完全累積形成該觸控信號。 【實施方式】 為了使貴審查委員能更進一步瞭解本創作為達成預定目 的所採取之技術、手段及功效，請參閱以下有關本創作之詳細說 M366125 明與附圖，相信本創作之目的、特徵與特點，當可由此得一深入 且具體之瞭解，然而所附圖式僅提供參考與說明用，並非用來對 本創作加以限制者。 請參閱圖三所示，係為本創作電容式觸控感測裝置之電路方 塊實施例示意圖。而圖四係為本創作單一感測按鍵形成之等效電 路示意圖。本創作之電容式觸控感測裝置包括有一觸控板200、 一驅動單元100、一感測單元600、一電壓回饋單元500及一微 處理器400。 其中，該觸控板200上佈設有複數感測按鍵202組成之觸控 矩陣，每一組感測按鍵202係由一驅動線201A及一感測線201B 形成一組等效電容器102。在該等效電容器之週遭形成有驅動線 端雜散電容502及感測線端雜散電容503，而該些形成的雜散電 容值往往大於該等效電容器102的電容值。 其中，微處理器400係電連接該驅動單元100及該感測單元 600，而該驅動單元100係電連接該觸控板200上之該些感測按 鍵202的驅動線201A，該驅動單元100係受該微處理器400之 控制，可產生一連續脈波信號501逐一傳送至任一組感測按鍵 202之驅動線201A，使得相對應之感測線201B上，可耦合感應 出一電荷電壓； 其中感測單元600係電連接該觸控板200上之該些感測按鍵 202的感測線201B，該感測單元600可擷取該些感測線201B上 所耦合感應出的電荷電壓，並將其累積後產生一觸控信號，該微 M366125 處理器400會擷撖該觸控信號，以判斷出是否有某一或某些感測 按鍵被觸碰。較佳地，該感測電路可簡化成包含一積分器i、 一參考電位比較器602及一計數器603。 本創作與習知最重要的不同處在於，本創作設計一電壓回鎖 單元500電連接於該些感測線201B與該感測單元6〇〇之間，其 ^主要作用在於：在下一脈波信號501前，將前一脈波信號時，該 •感測單元600所產生之電荷電壓回饋至感測線端201B，使得回 • 饋的電荷電壓可先和該感測按鍵周遭的雜散電容分享，以抵銷雜 散電谷值，當下一脈波仏號501來臨時，雜散電容效應被抵消， 而感測單元600所耦合感應之電荷電壓就不會再被雜散電容所 分享，因此能完全累積真正的感應電荷電壓，形成真正的觸控信 號。 職是’本創作確能藉上述所揭露之技術，提供一種迥然不同 於習知者的設計，堪能提高整體之使用價值，又其申請前未見於 # 刊物或公開使用，誠已符合新型專利之要件，爰依法提出新型專 利申請。 惟，上述所揭露之圖式、說明，僅為本創作之實施例而已， 凡精于此項技藝者當可依據上述之說明作其他種種之改良，而這 些改變仍屬於本創作之發明精神及以下所界定之專利範圍中。 【圖式簡單說明】 圖一係為目前習知的電容式觸控感測裝置電路方塊圖。 圖二A、Β、C係為習知常見的感測按鍵圖形化示意圖。 7 M366125 圖三係為本創作電容式觸控感測裝置之電路方塊實施例示 意圖。 圖四係為本創作單一感測按鍵形成之等效電路示意圖。 【主要元件符號說明】 100 驅動電路 102 等效電容器 200 等效電容觸控板 201A 驅動線 201B 感測線 202 感測按鍵 300 感測單元 301 積分器 302 放大器 303 類比數位轉換器 304 計數器 400 微處理器 500 電壓回饋單元 501 脈波信號 502 驅動線端雜散電容 503 感測線端雜散電容 600 感測單元 601 積分器 602 參考電位比較器 603 計數器3〇〇 and - microprocessor働, and the equivalent capacitive touchpad is provided with a complex array of sensing buttons on the fine, each sensing button system, two sets of patterned conductors on the touchpad The space is separated to form an equivalent capacitance, and the common sensing button view patterned conductor has a spiral shape as shown in FIG. 2A, a comb type of FIG. 2B, or a snake type of FIG. 2C, and the like, and the sensing button 2〇 The two sets of conductors 2 are respectively connected into a driving line 201A and a sensing line 201B. The driving circuit 1 is connected to the plurality of the driving lines 2〇1A to the equivalent capacitive touch panel 200′, and the sensing unit 300 is also connected to the complex array of the sensing lines 2〇ib to the equivalent capacitive touch. The board 200 is connected to the driving circuit 1 and the sensing unit 300. The microprocessor 400 sequentially sends a series of pulse wave signals to the driving line 201A of each group of sensing buttons 202 via the driving circuit, so that the sensing line 201B corresponding to the sensing button 2〇2 senses a series of The corresponding charge energy, the sensing unit 300 temporarily accumulates the corresponding charge energy one by one in a 3 M366125 integrator 301, and then amplifies the potential by an amplifier 302, and performs an analog-to-digital conversion. The 303 converts the charge energy into a digital signal and stores it in a counter 304 to form a touch signal. Finally, the microprocessor 400 reads the touch signals formed by each set of the sensing buttons 202 one by one, and analyzes and compares the signals. It is judged that the sensing of a certain group or groups is touched by the measurement. According to the circuit principle of the above-mentioned conventional capacitive touch sensing device, it is mainly to sense the change of the charge energy of each group of equivalent capacitances on the touch panel, but the circuit board is affected by the touch panel during the manufacturing process. The thickness of the sensing button is different from the type of the sensing button, or the actual wiring planning requirement, so that the stray capacitance value seen by each group of sensing buttons tends to be greater than the equivalent capacitance value of the sensing button, so when the touch The more the number of sensing buttons disposed on the board, the smaller the size of the sensing button is, and the equivalent capacitance value of the sensing button is smaller, and the stray capacitance value obtained by the sensing button is greater than the sense. Measure the equivalent capacitance of the button. At present, the industry encounters the problem that the stray capacitance value of the touch panel sensing button is greater than the equivalent capacitance value, and the charge energy coupled by each sensing button is temporarily stored in the integrator accumulation, and the spurious and the spurious are required. Capacitor sharing can offset the stray capacitance value, causing the integrator to accumulate only a small amount of charge energy generated by the sensing button, thus increasing the difficulty in judging the touch signal, and therefore it is necessary to design an amplifier to The signal of the integrator is amplified to increase the complexity of the sensing circuit. In view of this, the creator of the present invention has added a voltage feedback unit to the circuit in order to solve the problem of the above-mentioned conventional capacitive touch panel, so as to solve the problem that the equivalent capacitance of the sensing button is coupled to the charge energy to be shared by the larger stray capacitance. The problem is that the sensor sensing energy of the M366125 can be fully captured by the sensing unit, thereby increasing the sensitivity, and the signal amplifier is not needed to simplify the circuit structure of the sensing unit. [New content] The main purpose of this creation is to provide a kind of capacitive touch sensing device, which can solve the problem that the equivalent capacitance of the sensing button is combined with the charge energy to be shared by the larger stray capacitance, resulting in increased touch. The problem of judging the difficulty of the control signal. 'In view of the above purpose', the main technical feature of the present invention is to provide a type of electric Φ capacitive touch sensing device, which comprises a touch panel and a touch sensor composed of a plurality of sensing buttons. a matrix, each set of sensing buttons is formed by a driving line and a sensing line to form a set of equivalent capacitors; a driving unit electrically connecting the driving lines of the sensing buttons on the touch panel can generate a continuous pulse wave The signals are transmitted to the driving lines of any group of sensing buttons one by one, so that the corresponding sensing lines are lightly coupled to induce a charge voltage; the sensing unit is electrically connected to the sensing lines of the touch panel, and the sensing lines can be extracted. Sensing the induced charge voltage on the sensing line and accumulating it to generate a touch signal; and - the voltage feedback secret element is electrically connected between the sensing lines and the sensing unit, and the lower-pulse signal Before 'feedback' - the pulse voltage generated by the sensing unit to the sensing line end 'pre-filling the stray capacitance around the sensing button to the integrator potential to offset the charge sharing effect of the stray capacitance, to be down-continuous pulse signal When the sensing voltage of the sensing unit is lightly coupled, the touch signal can be fully accumulated to form the touch signal. [Embodiment] In order to enable the reviewing committee to further understand the techniques, means and effects of the present work for achieving the intended purpose, Please refer to the following M366125 and the drawings for the details of this creation. I believe that the purpose, features and characteristics of this creation can be obtained from this in-depth and specific understanding. However, the drawings are only for reference and explanation, not for use. To limit the creation of this creation, please refer to FIG. 3, which is a schematic diagram of an embodiment of a circuit block for creating a capacitive touch sensing device, and FIG. 4 is a schematic diagram of an equivalent circuit formed by creating a single sensing button. The capacitive touch sensing device of the present invention includes a touch panel 200, a driving unit 100, a sensing unit 600, a voltage feedback unit 500, and a micro The touch panel 200 is provided with a touch matrix composed of a plurality of sensing buttons 202. Each of the sensing buttons 202 is formed by a driving line 201A and a sensing line 201B to form a set of equivalent capacitors 102. A drive line end stray capacitance 502 and a sense line end stray capacitance 503 are formed around the equivalent capacitor, and the formed stray capacitance values are often greater than the capacitance value of the equivalent capacitor 102. The driving unit 100 is electrically connected to the driving unit 201 and the driving unit 201A of the sensing buttons 202 on the touch panel 200, and the driving unit 100 is subjected to the micro processing. The control unit 400 can generate a continuous pulse wave signal 501 to be transmitted to the driving line 201A of any one of the sensing buttons 202 one by one, so that a corresponding charging voltage can be coupled and sensed on the corresponding sensing line 201B; wherein the sensing unit 600 The sensing line 201 is electrically connected to the sensing lines 201B of the sensing buttons 202 on the touch panel 200. The sensing unit 600 can capture the charge voltages induced on the sensing lines 201B and accumulate them to generate a Touch signal, the The processor 400 captures will M366125 Han the touch signal to determine whether there is one or some of the sensing button is touched. Preferably, the sensing circuit can be simplified to include an integrator i, a reference potential comparator 602, and a counter 603. The most important difference between the present invention and the prior art is that the voltage-lockback unit 500 is electrically connected between the sensing lines 201B and the sensing unit 6〇〇, and its main function is: in the next pulse wave. Before the signal 501, when the previous pulse signal is used, the charge voltage generated by the sensing unit 600 is fed back to the sensing line terminal 201B, so that the back-charged charge voltage can be first shared with the stray capacitance around the sensing button. To offset the stray electric valley value, when the next pulse wave 501 comes, the stray capacitance effect is cancelled, and the charge voltage induced by the sensing unit 600 is no longer shared by the stray capacitance, so It can fully accumulate the true induced charge voltage to form a true touch signal. The job is 'this creation can indeed use the above-disclosed technology to provide a design that is different from the well-known person, which can improve the overall use value, and it has not been seen in # publication or public use before the application, and has already complied with the new patent. Essentials, 提出 file a new type of patent application. However, the above-mentioned drawings and descriptions are only examples of the present invention, and those skilled in the art can make other improvements according to the above description, and these changes still belong to the inventive spirit of the present invention. The scope of the patents defined below. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a conventional capacitive touch sensing device. Figure 2A, Β, and C are schematic diagrams of common sensing buttons. 7 M366125 Figure 3 is an illustration of the circuit block embodiment of the capacitive touch sensing device. Figure 4 is a schematic diagram of the equivalent circuit formed by creating a single sensing button. [Main component symbol description] 100 drive circuit 102 equivalent capacitor 200 equivalent capacitive touch panel 201A drive line 201B sense line 202 sense button 300 sense unit 301 integrator 302 amplifier 303 analog to digital converter 304 counter 400 microprocessor 500 voltage feedback unit 501 pulse wave signal 502 drive line end stray capacitance 503 sense line end stray capacitance 600 sensing unit 601 integrator 602 reference potential comparator 603 counter