TWI475463B - Control circuit for a touch screen - Google Patents
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Description
本發明是有關於一種適用於觸控螢幕之控制電路,以電阻式觸控螢幕為例,特別是指一種控制電路對於該電阻式觸控螢幕之辨識區域能達到多點讀取的目的結果(一次取得多於一組(X軸,Y軸)座標值)。The invention relates to a control circuit suitable for a touch screen, taking a resistive touch screen as an example, in particular, a control circuit can achieve multi-point reading for the identification area of the resistive touch screen ( Get more than one set (X-axis, Y-axis) coordinate values at a time).
觸控螢幕(Touch panel)又稱為觸控面板,是個可接收觸頭(無論是手指或膠筆尖等)等輸入信號的螢幕,裝置於LCD(液晶顯示器)前,當接觸了螢幕上的圖形按鈕時,螢幕上的觸覺反饋系統可根據預先編程的程式驅動各種連結裝置,可用以取代機械式的按鈕面板,並藉由液晶顯示畫面製造出生動的影音效果。A touch panel, also known as a touch panel, is a screen that can receive input signals such as a finger or a glue tip. It is placed in front of the LCD (liquid crystal display) and touches the graphic on the screen. When the button is pressed, the on-screen tactile feedback system can drive various connection devices according to a pre-programmed program, which can replace the mechanical button panel and create a live sound and video effect through the liquid crystal display screen.
簡單地說,觸控螢幕指一種可觸控式的螢幕,通常是在LCD液晶面板上覆蓋一層壓力板,其對壓力有高敏感度,當物體施壓於其上時會有電流信號產生以定出壓力源位置,並可動態追蹤。Simply put, a touch screen refers to a touch-sensitive screen. Usually, a liquid crystal panel is covered with a pressure plate, which is highly sensitive to pressure. When an object is pressed on it, a current signal is generated. The pressure source location is determined and dynamically tracked.
就目前市場Touch Panel製作技術種類(表1.1)大致可分為五類:The current types of Touch Panel production technologies (Table 1.1) can be roughly divided into five categories:
1.電阻式(resistive)、2.電容式(capacitive)、3.聲波式(acoustic)、4.投射式電容(projected capacitive)及5.紅外線式(infrared rays)。1. resistive, 2. capacitive, 3. acoustic, 4. projected capacitive, and 5. infrared ray.
而以市面上較常使用的電阻式觸控螢幕為例,請參照第1圖,其為習用電阻式觸控面板的工作原理示意圖。對於電阻式觸控面板1而言,其具有上導電層11與下導電層12,上導電層11及下導電層12中間亦以間隙物13(圖中未示出)分隔。下導電層12的四周圍分別設置了複數條分壓電極與複數條輔助電極,而位於相對邊的分壓電極與輔助電極是彼此平行,位於相鄰邊的分壓電極與輔助電極是彼此垂直。位於其中一組相互平行之對邊的分壓電極與輔助電極共同形成二條X電路121、121’,而位於另一組相互平行之對邊的分壓電極與輔助電極共同形成二條Y電路122、122’。For example, the resistive touch screen used in the market is taken as an example. Please refer to FIG. 1 , which is a schematic diagram of the working principle of the conventional resistive touch panel. For the resistive touch panel 1, it has an upper conductive layer 11 and a lower conductive layer 12, and the upper conductive layer 11 and the lower conductive layer 12 are also separated by a spacer 13 (not shown). A plurality of voltage dividing electrodes and a plurality of auxiliary electrodes are respectively disposed around the lower conductive layer 12, and the voltage dividing electrode and the auxiliary electrode on the opposite sides are parallel to each other, and the voltage dividing electrode and the auxiliary electrode on the adjacent sides are perpendicular to each other. . The voltage dividing electrode and the auxiliary electrode located in a pair of mutually parallel sides form two X circuits 121, 121', and the voltage dividing electrode and the auxiliary electrode located on the opposite side of the other group form two Y circuits 122, 122'.
承上,利用二條X電路121、121’之間形成一個5V的電壓降,並且利用二條Y電路122、122’之間形成另一個5V的電壓降。當觸控面板1被使用者觸碰時,便能夠藉由上導電層11來偵測出下導電層12被觸碰所在點的的電壓大小,所偵測到的電壓值傳送給控制器(圖中未示出)後取得其座標值。而較不幸地,當使用者同時針對電阻式觸控螢幕之辨識區域觸碰兩點或兩點以上時,則礙於現有技術目前尚未實現。As a result, a voltage drop of 5 V is formed between the two X circuits 121, 121', and another voltage drop of 5 V is formed between the two Y circuits 122, 122'. When the touch panel 1 is touched by the user, the upper conductive layer 11 can detect the voltage of the point where the lower conductive layer 12 is touched, and the detected voltage value is transmitted to the controller ( The coordinate value is obtained after not shown in the figure. Unfortunately, when the user touches two or more points on the identification area of the resistive touch screen at the same time, the prior art is not yet realized.
尚且,對於如電阻式觸控螢幕運用於PDA、提款機、到工業用的觸控電腦時,其觸控螢幕上的人機介面(user interface)上圖像及其與相應電性連接的內部電路運作方面也是開發人員需考慮的設計觀點。簡易地說,在電阻式觸控螢幕上的人機介面提供下列方式與使用者進行互動:Moreover, for a touch-sensitive computer such as a resistive touch screen for use in a PDA, a cash machine, or an industrial touch computer, an image on a user interface on the touch screen and its corresponding electrical connection Internal circuit operation is also a design perspective that developers need to consider. Simply put, the human interface on the resistive touch screen provides the following ways to interact with the user:
輸入訊息模式:以多個不同圖像選項或文字輸入框(統稱為辨識區域)提供使用者操作使用。Input message mode: Provides user operation with multiple different image options or text input boxes (collectively referred to as identification areas).
輸出訊息模式:觸控螢幕依照使用者所輸入訊息相應地顯示其內部電路所進行處理的結果。Output message mode: The touch screen displays the result of processing by its internal circuit according to the message input by the user.
所不期望地,在電阻式觸控螢幕之辨識區域上,因使用者在辨識區域上進行資料訊息之輸入程序時,若觸碰到其它的使用者不期望的圖像選項時,使得在建構在該電阻式觸控螢幕之輸出訊息模式會立即顯示出不被期望的結果。Undesirably, in the identification area of the resistive touch screen, when the user inputs the data message on the identification area, if the user selects an image option that is not desired by the user, the construction is made. The output message mode on the resistive touch screen immediately shows an undesired result.
是故,如有一種電路係能對於觸控螢幕(如電阻式觸控螢幕為例)之辨識區域觸碰兩點或兩點以上時同時進行信號處理及建構在該電阻式觸控螢幕之輸出訊息模式不會顯示出使用者不被期望的結果應是迫切需要的。Therefore, if a circuit system can touch two or more points in the recognition area of a touch screen (such as a resistive touch screen), the signal processing is simultaneously performed and the output of the resistive touch screen is constructed. The message mode does not show that the user's undesired results should be urgently needed.
本發明之一目的係提供一種適用於觸控螢幕之控制電路,以電阻式觸控螢幕為例,該電阻式觸控螢幕具有複數個外接信號讀取線,基於一般傳統的控制電路所包含的一主機端、一類比對數位轉換器(A/D Converter)及一電壓偏壓控制器,特別地,本發明之該控制電路在該電阻式觸控螢幕與該類比對數位轉換器之間設有一多工器。於一實施例中,該電阻式觸控螢幕之多個辨識區域同時接收多個輸入訊息(亦指至少二輸入訊息以上)時,該多工器之多個輸入端藉由其相應連接的外接信號讀取線以接收相應所產生的多個電壓信號,且該多工器依該主機端或該多工器內設一選擇信號之指定狀態選擇性地輸出包含全部已被選取或部份已被選取多個外接信號讀取線之資訊之多個類比信號,以達到多點讀取的目的結果(一次取得多於一組(X軸,Y軸)座標值)。An object of the present invention is to provide a control circuit suitable for a touch screen. Taking a resistive touch screen as an example, the resistive touch screen has a plurality of external signal reading lines, which are included in a conventional control circuit. a host side, a type of analog-to-digital converter (A/D converter) and a voltage bias controller. In particular, the control circuit of the present invention is disposed between the resistive touch screen and the analog-to-digital converter. There is a multiplexer. In one embodiment, when multiple identification areas of the resistive touch screen simultaneously receive a plurality of input messages (also referred to as at least two input messages), multiple inputs of the multiplexer are connected by their corresponding connections. The signal reading line receives the corresponding generated plurality of voltage signals, and the multiplexer selectively outputs all the selected or partially selected ones according to the specified state of the selection signal in the host end or the multiplexer A plurality of analog signals of a plurality of external signal reading lines are selected to achieve the purpose of multi-point reading (more than one set (X-axis, Y-axis) coordinate values are obtained at a time).
其次,於第一實施例中所提及的多工器,於一第二實施例中以多個獨立讀取單元(亦指至少二個獨立讀取單元以上)亦能執行,且每一獨立讀取單元係各自地配置一類比對數位轉換器,當使用者碰觸該電阻式觸控螢幕之辨識區域多次(亦指至少二次以上)時,亦能達到多點讀取的目的結果(一次取得多於一組(X軸,Y軸)座標值)。Secondly, the multiplexer mentioned in the first embodiment can be executed in a second embodiment by a plurality of independent reading units (also referred to as at least two independent reading units), and each is independent. The reading unit is configured with a type of comparison digital converter. When the user touches the identification area of the resistive touch screen multiple times (also referred to at least twice), the purpose of multi-point reading can also be achieved. (Get more than one set (X-axis, Y-axis) coordinate values at a time).
特別地,對於習知觸控螢幕顯示出不被期望的結果的缺陋,本發明亦提供一種電路及軟體設計的策略,當使用者在該電阻式觸控螢幕上多個辨識區域上進行資料輸入訊息程序,若觸碰到其它的使用者不期望的圖像選項時,在該控制電路內的該多工器依據該主機端或該多工器內設一選擇信號之指定狀態選擇性地輸出包含全部已被選取或部份已被選取多個外接信號讀取線之資訊之多個類比信號,並經該類比對數位轉換器轉換為相應地該等數位信號後,接著,經該類比對數位轉換器轉換為相應地數位信號,最後經由該主機端內的一驅動程式或應用程式依據與該等辨識區域相關聯的一預定狀態進行判別以決定是否輸出該等數位信號。In particular, the present invention also provides a circuit and software design strategy for a user to display data on a plurality of identification areas on the resistive touch screen for the lack of undesired results of the conventional touch screen. Entering a message program, if the image option that is not desired by the user is touched, the multiplexer in the control circuit selectively selects a specified state of the selection signal according to the host end or the multiplexer Outputting a plurality of analog signals including all of the selected or partially selected external signal read lines, and converting the analog signals to corresponding digital signals, and then comparing the analog signals The digital converter converts to a corresponding digital signal, and finally determines whether to output the digital signal according to a predetermined state associated with the identification areas via a driver or application in the host.
於一第二實施例中以多個獨立讀取單元(亦指至少二個獨立讀取單元以上)進行多點讀取的目的結果(一次取得多於一組(X軸,Y軸)座標值),每一獨立讀取單元也可設計為:每一獨立讀取單元依各自一預設狀態而相應地轉換或不轉換類比信號。相同地,以多個獨立讀取單元取代配置在該電阻式觸控螢幕與該類比對數位轉換器之間的該多工器相應地轉換或不轉換類比信號後,經各自相應地連接的類比對數位轉換器轉換為相應地數位信號後,與該等類比對數位轉換器連接的該主機端內的一驅動程式或應用程式依據與該等辨識區域相關聯的一預定狀態進行判別以決定是否輸出該等數位信號,亦使得該電阻式觸控螢幕只顯示出使用者所期望的結果。In a second embodiment, the result of multi-point reading is performed by a plurality of independent reading units (also referred to as at least two independent reading units) (more than one set (X-axis, Y-axis) coordinate values are obtained at a time Each independent reading unit can also be designed such that each independent reading unit converts or does not convert the analog signal accordingly according to a respective preset state. Similarly, after the multiplexer configured between the resistive touch screen and the analog-to-digital converter is converted or not converted with an analog signal by a plurality of independent reading units, respectively, the analogies are respectively connected After converting the digital converter to the corresponding digital signal, a driver or application in the host terminal connected to the analog-to-digital converter is discriminated according to a predetermined state associated with the identification regions to determine whether Outputting the digital signals also causes the resistive touch screen to display only the results desired by the user.
根據上述之目的,本發明提供一種適用於觸控螢幕之控制電路,以電阻式觸控螢幕為例,其中該電阻式觸控螢幕具有複數個外接信號讀取線(pick-up line),且該電阻式觸控螢幕同步地接收多個輸入訊息,其中該控制電路包含:According to the above objective, the present invention provides a control circuit suitable for a touch screen, which is exemplified by a resistive touch screen, wherein the resistive touch screen has a plurality of external signal pick-up lines, and The resistive touch screen synchronously receives a plurality of input messages, wherein the control circuit comprises:
一多工器(multiplexer),具有與該等外接信號讀取線之數量一預定數量之輸入端、一選擇端及一輸出端,且該多工器透過與該等輸入端相應地連接該等外接信號讀取線而接收該等輸入訊息,及依據一選擇信號而輸出一類比信號,其中該類比信號包含已被選取多個外接信號讀取線之資訊;a multiplexer having a predetermined number of input terminals, a selection terminal, and an output terminal, and the multiplexer is connected to the input terminals correspondingly to the input terminals Receiving the input signal by the external signal reading line, and outputting an analog signal according to a selection signal, wherein the analog signal includes information of the plurality of external signal reading lines selected;
一類比對數位轉換器(A/D Converter),透過該多工器之該輸出端而將該類比信號轉換成一數位信號;A class of analog to digital converter (A/D Converter) for converting the analog signal into a digital signal through the output of the multiplexer;
一主機端,其中該選擇信號係由該主機端產生,且依據該數位信號進行一特定處理程序;以及a host end, wherein the selection signal is generated by the host end, and a specific processing procedure is performed according to the digital signal;
一電壓偏壓控制器,係根據來自該主機端之一控制偏壓信號而產生包含多個偏壓值之一偏壓信號。A voltage bias controller generates a bias signal comprising a plurality of bias values based on a control bias signal from one of the host terminals.
根據上述之又一目的,本發明提供一種適用於觸控螢幕之控制電路,以電阻式觸控螢幕為例,其中該電阻式觸控螢幕具有複數個外接信號讀取線,且該電阻式觸控螢幕係同步地接收複數個輸入訊息,而該控制電路包含:According to still another object of the present invention, the present invention provides a control circuit suitable for a touch screen, which is exemplified by a resistive touch screen, wherein the resistive touch screen has a plurality of external signal reading lines, and the resistive touch The control screen simultaneously receives a plurality of input messages, and the control circuit includes:
複數個獨立讀取單元,係各自地與該等外接信號讀取線耦接,且該等獨立讀取單元透過所相應的該等外接信號讀取線來接收該等輸入訊息以各自地產生複數個類比信號;a plurality of independent reading units respectively coupled to the external signal reading lines, and the independent reading units receive the input signals through the corresponding external signal reading lines to generate respective numbers Analog signal
複數個類比對數位轉換器,係各自地與該等獨立讀取單元耦接,且該等類比對數位轉換器對該等類比信號轉換為複數個數位信號;a plurality of analog-to-digital converters respectively coupled to the independent read units, and the analog-to-digital converters convert the analog signals into a plurality of digital signals;
一主機端,與該等類比對數位轉換器耦接,且依據該等數位信號進行一特定處理程序;以及a host side coupled to the analog-to-digital converters, and performing a specific processing procedure according to the digital signals;
一電壓偏壓控制器,係根據來自該主機端之一控制偏壓信號而產生包含多個偏壓值之一偏壓信號。A voltage bias controller generates a bias signal comprising a plurality of bias values based on a control bias signal from one of the host terminals.
一般而言,現有的技術無法滿足對於觸控螢幕之辨識區域觸碰兩點或兩點以上時同時進行信號處理及若使用者觸碰到其它不期望的圖像選項時,建構在該電阻式觸控螢幕之輸出訊息模式會顯示出使用者不被期望的結果。In general, the existing technology cannot satisfy the requirement that when the identification area of the touch screen touches two or more points and simultaneously performs signal processing and if the user touches other undesired image options, the resistor is constructed. The output message mode of the touch screen will show the result that the user is not expected.
本發明所提出的一種控制電路亦能克服上述之缺陋,此控制電路適用於1.電阻式(resistive)、2.電容式(capacitive)、3.聲波式(acoustic)、4.投射式電容(projected capacitive)及5.紅外線式(infrared rays)此類型的觸控螢幕。The control circuit proposed by the invention can overcome the above disadvantages, and the control circuit is applicable to 1. resistive, capacitive, 3. acoustic, and 4. projected capacitor (projected capacitive) and 5. infrared rays (infrared rays) of this type of touch screen.
本實施例以電阻式觸控螢幕說明概要,由本發明所提出的控制電路所運用的電阻式觸控螢幕乃基於一般傳統的電阻式觸控螢幕2,是利用氧化銦錫導電玻璃21(ITO Glass)及上及下導電薄膜(ITO Film)22,22’為主要材料,同時在上層的導電薄膜與下層的導電玻璃間設有撐開空間的點隔片23(Dot Spacer),且該電阻式觸控螢幕具有複數個外接信號讀取線24(pick-up line),如第2圖所示。In this embodiment, the resistive touch screen used by the control circuit proposed by the present invention is based on a conventional conventional resistive touch screen 2, which utilizes indium tin oxide conductive glass 21 (ITO Glass). And the upper and lower conductive films (ITO films) 22, 22' are main materials, and a dot spacer 23 (Dot Spacer) with a space for expansion is provided between the upper conductive film and the lower conductive glass, and the resistive type The touch screen has a plurality of external signal pick-up lines, as shown in FIG.
第一實施例說明Description of the first embodiment
而對於該控制電路較詳細的電路說明,如第3圖所示,此控制電路3包含一多工器31(multiplexer)、一類比對數位轉換器32(A/D Converter)、一主機端33及一電壓偏壓控制器34,而對於該多工器31與該電阻式觸控螢幕4之連接關係還需講述地為,該多工器31透過本身一預定數量之輸入端與該電阻式觸控螢幕4之該等外接信號讀取線41電性地連接。而前述所提及的預定數量之輸入端總數為可多於、等於或少於該電阻式觸控螢幕4之該等外接信號讀取線41數量。於第一實施例說明中,該多工器31所具有該等輸入端N1 ~Nn 總數N個等於該電阻式觸控螢幕4之該等外接信號讀取線41數量M1 ~Mn 總數N個為代表說明,其中N為一至少大於2的正整數。For a detailed circuit description of the control circuit, as shown in FIG. 3, the control circuit 3 includes a multiplexer 31, a type of analog-to-digital converter 32 (A/D Converter), and a host terminal 33. And a voltage bias controller 34, and for the connection relationship between the multiplexer 31 and the resistive touch screen 4, the multiplexer 31 transmits a predetermined number of inputs and the resistive The external signal reading lines 41 of the touch screen 4 are electrically connected. The predetermined number of input terminals mentioned above may be more than, equal to or less than the number of the external signal reading lines 41 of the resistive touch screen 4. In the description of the first embodiment, the multiplexer 31 has a total number N of the input terminals N 1 N N n equal to the number of the external signal read lines 41 of the resistive touch screen 4 M 1 ~M n A total of N are representative, where N is a positive integer greater than two.
承第2圖所示,當手指、觸控筆或其他介質對上層的導電薄膜觸同時地觸碰多處(或至少一處以上時),亦是該電阻式觸控螢幕4之多個辨識區域同時地接收多個輸入訊息使上下層電極導通並同時地產生多個電壓信號(或是接收至少一輸入訊息相應地產生一電壓信號),於第一實施例中,以手指同時地對在該電阻式觸控螢幕4之辨識區域之兩預選區塊A1及A2(見於第3圖所示)觸碰2次為實施說明。As shown in Figure 2, when a finger, a stylus or other medium touches the upper conductive film at the same time (or at least one or more), it is also a plurality of identifications of the resistive touch screen 4. The region simultaneously receives a plurality of input messages to turn on the upper and lower electrodes and simultaneously generate a plurality of voltage signals (or receive at least one input message to generate a voltage signal accordingly). In the first embodiment, the fingers are simultaneously The two preselected blocks A1 and A2 (shown in FIG. 3) of the identification area of the resistive touch screen 4 are touched twice for implementation.
然而,令人理解地,當同時地觸碰A1及A2兩預選區塊時,在該電阻式觸控螢幕4內的上下層電極會導通並同時地產生一第一電壓信號V1及一第二電壓信號V2(其中,該等電壓信號V1及V2皆視為一種類比信號)。而對於在於該電阻式觸控螢幕4內已被產生的該第一電壓信號V1及該第二電壓信號V2則透過其所相應連接的該等外接信號讀取線之一第一外接信號讀取線N1 及一第二外接信號讀取線N2 一併地被傳送至與兩外接信號讀取線N1 及N2 相應的連接該多工器之一第一輸入端M1 及一第二輸入端M2 ,以進行信號理。However, it is understood that when the two preselected blocks A1 and A2 are simultaneously touched, the upper and lower electrodes in the resistive touch screen 4 are turned on and simultaneously generate a first voltage signal V1 and a second. The voltage signal V2 (where the voltage signals V1 and V2 are regarded as an analog signal). For the first voltage signal V1 and the second voltage signal V2 that have been generated in the resistive touch screen 4, the first external signal is read through one of the external signal reading lines connected thereto. The line N 1 and the second external signal reading line N 2 are collectively transmitted to the first input terminal M 1 and the first one of the multiplexer corresponding to the two external signal reading lines N 1 and N 2 Two inputs M 2 for signal processing.
為人所熟知地,於第3圖中該多工器31為一種控制開關(controlled switch),當該多工器31之該第一輸入端M1 及該第二輸入端M2 分別地接收來自該第一外接信號讀取線N1 之該第一電壓信號V1及來自該第二外接信號讀取線N2 之該第二電壓信號V2時,該多工器31會透過其具有的一選擇端S來接收一選擇信號SP ,並依據此選擇信號SP 之指定狀態而透過其具有的一輸出端Z而輸出該等電壓信號V1及V2之其中之一,其中前述該選擇信號SP 係由該主機端33產生或由該多工器31內設。且不論由該主機端33產生或由該多工器31內設的該選擇信號SP ,其中該選擇信號SP 的指定狀態為人為所預定。所知悉地,程式設計者對於該多工器31之該選擇端S所接收該選擇信號SP 之指定狀態係藉由一硬體描述語言程式碼、一高階語言程式碼或一低階語言程式碼進行規劃。Well known manner, in FIG. 3 of the multiplexer 31 as a control switch (controlled switch), when the first input terminal of the multiplexer 31 of M 1 and M 2 of the second input terminal receiving respectively N 1 of the first voltage signal from the first external signal read line V1 and V2 when the voltage of the second signal from the second external signal read line of N 2, through which the multiplexer 31 will have a The selection terminal S receives a selection signal S P and outputs one of the voltage signals V1 and V2 through an output terminal Z having the specified state of the selection signal S P , wherein the selection signal S is P is generated by the host terminal 33 or built in by the multiplexer 31. Regardless generated by the host terminal 33 or by the features of the multiplexer 31 to the selection signal S P, which specifies the state of the selection signal S P is a human being predetermined. Knowing that the specified state of the selection signal S P received by the selector S of the multiplexer 31 is known by a hardware description language code, a high-level language code or a low-level language program. Code planning.
依據前述所言,在該第一實施例中,期望地,該多工器31依據此選擇信號SP 之指定狀態為該第一電壓信號V1先被選擇出,而來自該多工器31之該第一輸入端M1 所接收的該第一電壓信號V1則透過該多工器31之該輸出端Z而被傳送到該類比對數位轉換器32以進行一類比對數位轉換程序。Based on the said, in this first embodiment, desirably, the multiplexer 31 according to this selection signal S P of the specified state for a first voltage signal V1 is first selected, and the multiplexer 31 from the the first voltage V1 of the first input signal received by an M through the output terminal of the multiplexer 31 is transmitted to the Z alignment such digital converter 32 to perform an analog to digital conversion process.
承上,一般地,該類比對數位轉換器32係能將一輸入類比電壓信號轉換為包含多個數位碼之一數位信號,可推及地,在該控制電路3內被配置在與該多工器31之該輸出端Z電性連接的該類比對數位轉換器32對於來自該多工器31之該輸出端Z之該第一電壓信號V1進行類比對數位轉換程序以轉換出包含多個數位碼之一數位信號。In general, the analog-to-digital converter 32 is capable of converting an input analog voltage signal into a digital signal including a plurality of digital code, and is arbitrarily arranged in the control circuit 3 The analog-to-digital converter 32 electrically connected to the output terminal Z of the tool 31 performs an analog-to-digital conversion process on the first voltage signal V1 from the output terminal Z of the multiplexer 31 to convert a plurality of A digital signal of one of the digit codes.
持續地,被轉換成數位信號之該第一電壓信號V1被傳送至與該類比對數位轉換器32電性連接的該主機端33,之後,該主機端33依據該數位信號進行一特定處理程序。需解釋,在於該主機端33所進行的特定處理程序,如計算施壓介質的多個座標位置,或每點與另一點相隔的距離等等。Continuously, the first voltage signal V1 converted into a digital signal is transmitted to the host terminal 33 electrically connected to the analog-to-digital converter 32, and then the host terminal 33 performs a specific processing procedure according to the digital signal. . It is to be explained that the specific processing performed by the host terminal 33, such as calculating a plurality of coordinate positions of the pressing medium, or a distance between each point and another point, and the like.
在此同時,該主機端33或由一控制偏壓電路(未顯示)來產生一控制偏壓信號CS ,而在該控制電路3內的該電壓偏壓控制器34係根據來自該主機端33之該控制偏壓信號CS 而產生包含多個偏壓值之一偏壓信號BS 。At the same time, the host terminal 33 or a control bias circuit (not shown) generates a control bias signal C S , and the voltage bias controller 34 in the control circuit 3 is based on the slave host. The control bias signal C S of terminal 33 produces a bias signal B S comprising a plurality of bias values.
同樣地,在該第一電壓信號V1在該類比對數位轉換器32進行類比數位轉換之後,來自該第二外接信號讀取線N2 之該第二電壓信號V2經該多工器31之該選擇端S所依據此選擇信號SP 之指定狀態透過該多工器31之該輸出端Z而被傳送到該類比數位轉換器32以進行一類比對數位轉換程序,並被轉換出包含多個數位碼之一另一數位信號,可推及地,被轉換成數位信號之該第二電壓信號V2其後續處理過程與該第一電壓信號V1相同,故在此不必撰述。Similarly, after the first voltage signal V1 is analog-digital converted by the analog-to-digital converter 32, the second voltage signal V2 from the second external signal read line N 2 passes through the multiplexer 31. The designated state of the selection signal S P is transmitted to the analog-to-digital converter 32 through the output terminal Z of the multiplexer 31 for performing a class of analog-to-digital conversion process, and is converted into a plurality of The other digital signal of one of the digit codes can be pushed, and the subsequent processing of the second voltage signal V2 converted into a digital signal is the same as the first voltage signal V1, so it is not necessary to write it here.
特別地,對於習知該電阻式觸控螢幕4顯示出不被期望的結果的缺陋,配置在該電阻式觸控螢幕4與該類比對數位轉換器32之間的該多工器31所依據前述該等語言程式碼所預先規劃含多個判別式之程式碼進行讀取。In particular, for the conventional display that the resistive touch screen 4 exhibits an undesired result, the multiplexer 31 is disposed between the resistive touch screen 4 and the analog-to-digital converter 32. According to the foregoing language code, a program code containing a plurality of discriminant codes is pre-planned for reading.
舉例來說,在該電阻式觸控螢幕4之辨識區域之兩預選區塊A1及A2中,使用者所期望地欲對預選區塊A1進行文字輸入訊息時,不小心觸碰到預選區塊A2,瞬時,該多工器31之該第一輸入端M1 及該第二輸入端M2 分別地接收來自該第一外接信號讀取線N1 之該第一電壓信號V1及來自該第二外接信號讀取線N2 之該第二電壓信號V2,此時,該多工器31會透過其具有該選擇端S來接收含多個判別式程式碼之該選擇信號SP 進行判別程序,在該多工器31之該輸出端Z會依續地輸出來自該第一外接信號讀取線N1 之該第一電壓信號V1及來自該第二外接信號讀取線N2 之該第二電壓信號V2之一者。相同於先前說明,此等電壓信號V1及V2依續地經該類比對數位轉換器32轉換為包含多個數位碼之一第一數位信號及一第二數位信號,此時,該主機端33分別地接收該等數位信號,及在該主機端33內的一驅動程式或應用程式依據與該等辨識區域(以預選區塊A1及A2例)相關聯的一預定狀態進行判別以決定是否輸出該等數位信號。所知悉地,不期望的該第二數位信號經由該驅動程式或應用程式所依據該預定狀態而決定為不輸出,使得在該電阻式觸控螢幕4之輸出訊息模式只顯示出使用者所期望的訊息結果(亦指預選區塊A1)。For example, in the two preselected blocks A1 and A2 of the identification area of the resistive touch screen 4, when the user desires to input a text input message to the preselected block A1, the preselected block is accidentally touched. A2, instantaneous, the first input terminal of the multiplexer M 31 of the second input terminal 1 and M 2 respectively received from the first external signal reading line N 1 of the first voltage Vl and the signal from the second The second external signal reads the second voltage signal V2 of the line N 2 . At this time, the multiplexer 31 receives the selection signal S P including the plurality of discriminant codes through the selection terminal S to perform the discriminating process. The first voltage signal V1 from the first external signal reading line N 1 and the second external signal reading line N 2 are continuously outputted from the output terminal Z of the multiplexer 31. One of the two voltage signals V2. Similarly to the previous description, the voltage signals V1 and V2 are successively converted by the analog-to-digital converter 32 to include a first digital signal and a second digital signal of a plurality of digital codes. At this time, the host terminal 33 Receiving the digital signals separately, and a driver or application in the host terminal 33 determines whether to output according to a predetermined state associated with the identification regions (in the preselected blocks A1 and A2). These digital signals. It is known that the undesired second digit signal is determined not to be output according to the predetermined state via the driver or the application, so that the output message mode of the resistive touch screen 4 only displays the user's expectation. The result of the message (also referred to as pre-selected block A1).
而對於使用者在該電阻式觸控螢幕4之多個辨識區上碰觸一不期望的圖像選項時,在該主機端33依據與該等辨識區域相關聯的一預定狀態進行判別的情況下,使得在建構在該電阻式觸控螢幕4之輸出訊息模式不會顯示出不被期望的結果。When the user touches an undesired image option on the plurality of identification areas of the resistive touch screen 4, the host side 33 determines the predetermined state according to the identification area associated with the identification areas. Underneath, the output message mode constructed on the resistive touch screen 4 does not show an undesired result.
第二實施例說明Description of the second embodiment
基於在第一實施例中所提及的在該電阻式觸控螢幕與該類比對數位轉換器之間所配置的多工器,本發明提出另一種控制電路5,且相同地,該電阻式觸控螢幕8具有複數個外接信號讀取線81,如第4圖所示。Based on the multiplexer disposed between the resistive touch screen and the analog-to-digital converter mentioned in the first embodiment, the present invention proposes another control circuit 5, and similarly, the resistive type The touch screen 8 has a plurality of external signal reading lines 81 as shown in FIG.
承上,如第4圖所示,該控制電路5包含:複數個獨立讀取單元51、複數個類比對數位轉換器52、一主機端53及一電壓偏壓控制器54,且每一獨立讀取單元係各自地與每一外接信號讀取線耦接,及每一獨類比對數位轉換器係各自地與每一獨立讀取單元耦接,換言之,該等獨立讀取單元、該等外接信號讀取線及該等類比對數位轉換器之數量相同。以下為第二實施例說明介紹。As shown in FIG. 4, the control circuit 5 includes: a plurality of independent reading units 51, a plurality of analog-to-digital converters 52, a host terminal 53 and a voltage bias controller 54, and each of them is independent. The read units are each coupled to each of the external signal read lines, and each of the unique analog-to-digital converters is coupled to each of the individual read units, in other words, the independent read units, the The number of external signal read lines and the analog-to-digital converters are the same. The following is a description of the second embodiment.
承第2圖所示,當手指、觸控筆或其他介質對上層的導電薄膜觸同時地觸碰多次(或至少一次以上時),亦是該電阻式觸控螢幕8之多個辨識區域同時地接收多個輸入訊息使上下層電極導通並同時地產生多個電壓信號(或是接收至少一輸入訊息相應地產生一電壓信號),於第二實施例中,以手指同時地對在該電阻式觸控螢幕8之辨識區域之兩預選區塊A1及A2觸碰2次為實施說明(見於第4圖所示)。As shown in FIG. 2, when a finger, a stylus or other medium touches the upper conductive film simultaneously multiple times (or at least once), it is also a plurality of identification areas of the resistive touch screen 8. Simultaneously receiving a plurality of input messages to turn on the upper and lower electrodes and simultaneously generating a plurality of voltage signals (or receiving at least one input message to generate a voltage signal accordingly). In the second embodiment, the fingers are simultaneously The two pre-selected blocks A1 and A2 of the identification area of the resistive touch screen 8 are touched twice for implementation (see Figure 4).
令人理解地,當同時地觸碰A1及A2該兩預選區塊時,在該電阻式觸控螢幕8內的上下層電極會導通並同時地產生一第一電壓信號V1及一第二電壓信號V2(其中,該等電壓信號V1及V2皆視為一種類比信號)。而對於在於該電阻式觸控螢幕8內已被產生的該第一電壓信號V1及該第二電壓信號V2則透過其所相應連接的該等外接信號讀取線之一第一外接信號讀取線N1 及一第二外接信號讀取線N2 一併地被傳送其所相應地相連接的一第一獨立讀取單元U1及一第二獨立讀取單元U2。It is understood that when the two pre-selected blocks of A1 and A2 are simultaneously touched, the upper and lower electrodes in the resistive touch screen 8 are turned on and simultaneously generate a first voltage signal V1 and a second voltage. Signal V2 (wherein the voltage signals V1 and V2 are regarded as an analog signal). The first voltage signal V1 and the second voltage signal V2 that have been generated in the resistive touch screen 8 are read by the first external signal through one of the external signal reading lines connected thereto. The line N 1 and the second external signal reading line N 2 are collectively transmitted with a first independent reading unit U1 and a second independent reading unit U2 which are connected thereto.
同步地,該第一獨立讀取單元U1將所接收來自該第一外接信號讀取線N1 之該第一電壓信號V1轉換為一第一類比信號P1及該第二獨立讀取單元U2將所接收來自該第二外接信號讀取線N2 之該第二電壓信號V2轉換為一第二類比信號P2,接著,來自該第一獨立讀取單元U1之該第一類比信號P1及來自該第二獨立讀取單元U2之該第二類比信號P2分別地經由一第一類比對數位轉換器C1及一第二類比對數位轉換器進行類比數位轉換,以將該第一類比信號P1及該第二類比信號P2轉換為一第一數位信號D1及一第二數位信號D2,接著,來自該第一類比對數位轉換器C1之該第一數位信號D1與該第二類比對數位轉換器C2之該第二數位信號D2被傳送到該主機端53內,與每一類比對數位轉換器電性連接的該主機端53依據該等數位信號D1及D2進行一特定處理程序,需解釋,在於該主機端53所進行的特定處理程序,如計算施壓介質的多個座標位置,或每點與另一點相隔的距離等等。Synchronization, the first unit U1 is independently reading the received signal read from the first external line N converts the first voltage signal V1 of an analog signal to a first P1 and the second unit U2 to read independently The second voltage signal V2 received from the second external signal reading line N 2 is converted into a second analog signal P2, and then the first analog signal P1 from the first independent reading unit U1 and from the The second analog signal P2 of the second independent reading unit U2 is analog-digital converted by a first analog-to-digital converter C1 and a second analog-to-digital converter, respectively, to the first analog signal P1 and the The second analog signal P2 is converted into a first digital signal D1 and a second digital signal D2, and then the first digital signal D1 from the first analog-to-digital converter C1 and the second analog-to-digital converter C2 The second digit signal D2 is transmitted to the host terminal 53. The host terminal 53 electrically connected to each type of analog-to-digital converter performs a specific processing procedure according to the digit signals D1 and D2. The host side 53 performs Handler, a plurality of computing the coordinate position of the pressure medium, or the distance of each point and another point spaced like.
在此同時,該主機端53或由一控制偏壓電路(未顯示)來產生一控制偏壓信號CS ,而在該控制電路5內的該電壓偏壓控制器54係根據來自該主機端53之該控制偏壓信號CS 而產生包含多個偏壓值之一偏壓信號BS 。At the same time, the host terminal 53 or a control bias circuit (not shown) generates a control bias signal C S , and the voltage bias controller 54 in the control circuit 5 is based on the slave host. The control of the bias signal C S of the terminal 53 produces a bias signal B S comprising a plurality of bias values.
於前述第二實施例中以多個獨立讀取單元(亦指至少二個獨立讀取單元以上)實現多點讀取的目的結果(一次取得多於一組(X軸,Y軸)座標值),於克服習知該電阻式觸控螢幕顯示出不被期望的結果的缺陋,該等獨立讀取單元之電路可設計為:每一獨立讀取單元依各自一預設狀態(如以布林值1為進行信號轉換,布林值為0不進行信號轉換)而相應地轉換或不轉換類比信號及該主機端53內的一驅動程式或應用程式依據與該等辨識區域相關聯的一預定狀態進行判別以決定是否輸出該等數位信號。In the foregoing second embodiment, the result of multi-point reading is realized by a plurality of independent reading units (also referred to as at least two independent reading units) (more than one set (X-axis, Y-axis) coordinate values are obtained at a time. ), in order to overcome the drawback that the resistive touch screen exhibits an undesired result, the circuits of the independent read units can be designed such that each individual read unit is in a predetermined state (eg, The Boolean value 1 is for signal conversion, the Boolean value is 0 for no signal conversion) and the analog signal is converted or not converted accordingly, and a driver or application in the host terminal 53 is associated with the identification region. A predetermined state is discriminated to determine whether to output the digital signals.
舉例來說,在該電阻式觸控螢幕8之辨識區域之兩預選區塊A1及A2中,使用者所期望地欲對預選區塊A1進行文字輸入訊息時,不小心觸碰到預選區塊A2,瞬時,在於該電阻式觸控螢幕8內已被產生的該第一電壓信號V1及該第二電壓信號V2則透過其所相應連接的該等外接信號讀取線之一第一外接信號讀取線N1 及一第二外接信號讀取線N2 一併地被傳送其所相應地相連接的一第一獨立讀取單元U1及一第二獨立讀取單元U2。For example, in the two pre-selected blocks A1 and A2 of the identification area of the resistive touch screen 8, when the user desires to input a text message to the pre-selected block A1, the pre-selected block is accidentally touched. A2, instantaneously, the first voltage signal V1 and the second voltage signal V2 that have been generated in the resistive touch screen 8 are transmitted through the first external signal of one of the external signal reading lines connected thereto. The read line N 1 and the second external signal read line N 2 are collectively transmitted with a first independent read unit U1 and a second independent read unit U2 connected thereto.
同步地,該第一獨立讀取單元U1將所接收來自該第一外接信號讀取線N1 之該第一電壓信號V1且依自身的一預設狀態(布林值為1)將該第一電壓信號V1轉換為該第一類比信號P1,及該第二獨立讀取單元U2將所接收來自該第二外接信號讀取線N2 之該第二電壓信號V2且依自身的一預設狀態(布林值為1)將該第二電壓信號V2轉換為該第二類比信號P2。Synchronization, the first unit U1 is independently reading the received external signal to read the first line of the first voltage signal V1 from N 1 and of itself by a predetermined state (a Boolean value) of the A voltage signal V1 is converted into the first analog signal P1, and the second independent reading unit U2 receives the second voltage signal V2 from the second external signal reading line N 2 and is preset by itself. The state (Bulin value is 1) converts the second voltage signal V2 into the second analog signal P2.
相同於先前說明,接著,來自該第一獨立讀取單元U1之該第一類比信號P1及來自該第二獨立讀取單元U2之該第二類比信號P2分別地經由一第一類比對數位轉換器C1及一第二類比對數位轉換器C2進行類比數位轉換,以將該第一類比信號P1及該第二類比信號P2轉換為一第一數位信號D1及一第二數位信號D2,接著,來自該第一類比對數位轉換器C1之該第一數位信號D1與該第二類比對數位轉換器C2之該第二數位信號D2被傳送到該主機端53內,此時,該主機端53分別地接收該等數位信號D1及D2,並在該主機端53內的一驅動程式或應用程式依據與該等辨識區域(以預選區塊A1及A2例)相關聯的一預定狀態進行判別以決定是否輸出該等數位信號D1及D2。所知悉地,不期望地的該第二數位信號D2經由該驅動程式或應用程式所依據該預定狀態而決定為不輸出。亦使得在該電阻式觸控螢幕8之輸出訊息模式只顯示出使用者期望的訊息結果(亦指預選區塊A1)。The same as the previous description, the first analog signal P1 from the first independent reading unit U1 and the second analog signal P2 from the second independent reading unit U2 are respectively converted via a first analog-to-digital conversion The analog C1 and the second analog-to-digital converter C2 perform analog-to-digital conversion to convert the first analog signal P1 and the second analog signal P2 into a first digital signal D1 and a second digital signal D2, and then The first digit signal D1 from the first analog-to-digital converter C1 and the second digit signal D2 of the second analog-to-digital converter C2 are transmitted to the host terminal 53. At this time, the host terminal 53 Receiving the digital signals D1 and D2, respectively, and determining a driver or application in the host terminal 53 according to a predetermined state associated with the identification regions (in the preselected blocks A1 and A2) It is determined whether or not to output the digital signals D1 and D2. It is known that the undesired second digit signal D2 is determined not to be output based on the predetermined state via the driver or application. The output message mode of the resistive touch screen 8 also displays only the result of the message desired by the user (also referred to as pre-selected block A1).
而對於使用者在該電阻式觸控螢幕8之多個辨識區上碰觸一不期望的圖像選項時,在該主機端53依據與該等辨識區域相關聯的一預定狀態進行判別的情況下,使得在建構在該電阻式觸控螢幕8之輸出訊息模式不會顯示出不被期望的結果。When the user touches an undesired image option on the plurality of recognition areas of the resistive touch screen 8, the host side 53 determines the predetermined state according to the identification area associated with the identification areas. Underneath, the output message mode constructed on the resistive touch screen 8 does not show undesired results.
最後,需注意地,由本發明所提出的控制電路,主要是提供在觸控面板之多個辨識區域之同時地進多點處理,因此只要運用本發明之控制電路皆可達到多點讀取目的結果。Finally, it should be noted that the control circuit proposed by the present invention mainly provides multi-point processing simultaneously with multiple identification areas of the touch panel, so that the control circuit of the present invention can achieve multi-point reading purposes. result.
而針對第一實施例中,若該電阻式觸控螢幕之多個辨識區域同時接收至少二個輸入訊息,則電阻式觸控螢幕之複數個外接信號讀取線之數量可設計為至少二個輸入端,因此,前述「多工器」可設計為具有至少二個輸入端、一選擇端及一輸出端,且該多工器透過與該至少二個輸入端相應地連接該至少二個外接信號讀取線而接收該至少二個輸入訊息。For the first embodiment, if the plurality of identification areas of the resistive touch screen simultaneously receive at least two input messages, the number of the plurality of external signal read lines of the resistive touch screen can be designed to be at least two. The multiplexer can be designed to have at least two input terminals, a selection terminal and an output terminal, and the multiplexer is connected to the at least two external terminals by correspondingly connecting the at least two external terminals The signal reads the line and receives the at least two input messages.
而針對第二實施例中,若該電阻式觸控螢幕之多個辨識區域同時接收至少二個輸入訊息,則該電阻式觸控螢幕之複數個外接信號讀取線之數量可設計為至少二個輸入端,因此,複數個獨立讀取單元之數量可設計為至少二個獨立讀取單元,且該至少二個獨立讀取單元係各自地與該至少二個外接信號讀取線耦接,而複數個類比對數位轉換器之數量可設計至少二個類比對數位轉換器,且該至少二個類比對數位轉換器係各自地與至少二個獨立讀取單元耦接。In the second embodiment, if the plurality of identification areas of the resistive touch screen simultaneously receive at least two input messages, the number of the plurality of external signal read lines of the resistive touch screen can be designed to be at least two. Therefore, the number of the plurality of independent reading units can be designed as at least two independent reading units, and the at least two independent reading units are respectively coupled to the at least two external signal reading lines. The plurality of analog-to-digital converters can be designed with at least two analog-to-digital converters, and the at least two analog-to-digital converters are each coupled to at least two independent read units.
本案得由熟悉本技藝之人士任施匠思而為諸般修飾,然皆不脫如附申請專利範圍所欲保護者。This case has been modified by people who are familiar with the art, but it is not intended to be protected by the scope of the patent application.
1...電阻式觸控面板1. . . Resistive touch panel
11...上導電層11. . . Upper conductive layer
12...下導電層12. . . Lower conductive layer
121、121’...X電路121, 121’. . . X circuit
122、122’...Y電路122, 122’. . . Y circuit
2...電阻式觸控螢幕2. . . Resistive touch screen
22...上導電薄膜twenty two. . . Upper conductive film
22’...下導電薄膜twenty two'. . . Lower conductive film
23...點隔片twenty three. . . Point spacer
24...外接信號讀取線twenty four. . . External signal reading line
3...控制電路3. . . Control circuit
31...多工器31. . . Multiplexer
32...類比對數位轉換器32. . . Analog to digital converter
33...主機端33. . . Host side
34...電壓偏壓控制器34. . . Voltage bias controller
4...電阻式觸控螢幕4. . . Resistive touch screen
41...外接信號讀取線41. . . External signal reading line
5...控制電路5. . . Control circuit
51...獨立讀取單元51. . . Independent reading unit
52...類比對數位轉換器52. . . Analog to digital converter
53...主機端53. . . Host side
54...電壓偏壓控制器54. . . Voltage bias controller
8...電阻式觸控螢幕8. . . Resistive touch screen
81...外接信號讀取線81. . . External signal reading line
為讓本發明之上述和其他目的、特徵、優點與實施例能更明顯易懂,所附圖式之詳細說明如下:The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.
第1圖係繪示習用電阻式觸控面板之內部電路。Fig. 1 is a diagram showing the internal circuit of a conventional resistive touch panel.
第2圖係繪示傳統的電阻式觸控螢幕之結構圖。Figure 2 is a block diagram showing the structure of a conventional resistive touch screen.
第3圖係繪示本發明之控制電路及一電阻式觸控螢幕之電路。Figure 3 is a diagram showing the control circuit of the present invention and a circuit of a resistive touch screen.
第4圖係繪示本發明之另一控制電路及一電阻式觸控螢幕之電路。Figure 4 is a diagram showing another control circuit of the present invention and a circuit of a resistive touch screen.
3...控制電路3. . . Control circuit
31...多工器31. . . Multiplexer
32...類比對數位轉換器32. . . Analog to digital converter
33...主機端33. . . Host side
34...電壓偏壓控制器34. . . Voltage bias controller
4...電阻式觸控螢幕4. . . Resistive touch screen
41...外接信號讀取線41. . . External signal reading line
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TW200802065A (en) * | 2006-05-24 | 2008-01-01 | Lg Electronics Inc | Touch screen device and operating method thereof |
TW200910176A (en) * | 2007-07-12 | 2009-03-01 | Qrg Ltd | Two-dimensional touch panel |
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TW200802065A (en) * | 2006-05-24 | 2008-01-01 | Lg Electronics Inc | Touch screen device and operating method thereof |
TW200910176A (en) * | 2007-07-12 | 2009-03-01 | Qrg Ltd | Two-dimensional touch panel |
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