TWI459268B - Touch sensing apparatus - Google Patents
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Description
本發明係與液晶顯示器有關；具體而言，本發明係關於一種能夠有效降低面板及環境所產生之雜訊的互感式電容觸控感測裝置。The present invention relates to a liquid crystal display; in particular, the present invention relates to a mutual inductance capacitive touch sensing device capable of effectively reducing noise generated by a panel and an environment.
隨著科技快速發展，薄膜電晶體液晶顯示器(TFT LCD)已逐步取代傳統顯示器，並已廣泛應用於電視、平面顯示器、行動電話、平板電腦以及投影機等各種電子產品上。對於具有觸控功能的薄膜電晶體液晶顯示器而言，觸控感測器是其重要的模組之一，其性能之優劣也直接影響液晶顯示器之整體效能。With the rapid development of technology, thin film transistor liquid crystal display (TFT LCD) has gradually replaced traditional displays, and has been widely used in various electronic products such as televisions, flat panel displays, mobile phones, tablet computers and projectors. For a thin film transistor liquid crystal display with touch function, the touch sensor is one of its important modules, and its performance directly affects the overall performance of the liquid crystal display.
一般而言，傳統具有互感式電容觸控功能的液晶顯示器包含有顯示面板、導電薄膜感應器(ITO sensor)以及觸控控制晶片。其中，導電薄膜感應器包含有複數條感測線及複數條驅動線，而觸控控制晶片則包含有複數個接腳。該等感測線分別耦接該等接腳。當驅動線傳送一驅動脈衝並於感測線耦合一微小電壓後，觸控控制晶片將會感測耦合電壓並根據耦合電壓的大小去判斷導電薄膜感應器是否被觸控。In general, a conventional liquid crystal display having a mutual capacitive touch function includes a display panel, an ITO sensor, and a touch control chip. The conductive film sensor includes a plurality of sensing lines and a plurality of driving lines, and the touch control chip includes a plurality of pins. The sensing lines are respectively coupled to the pins. After the driving line transmits a driving pulse and a small voltage is coupled to the sensing line, the touch control chip senses the coupling voltage and determines whether the conductive film sensor is touched according to the magnitude of the coupling voltage.
然而，上述傳統的液晶顯示器觸控感測方式具有某些嚴重的缺點，例如掃瞄速率太低、顯示面板所產生的雜訊嚴重影響觸控控制晶片的運作，甚至導致觸控點之誤判。有些系統為了避開面板所產生的雜訊而在導電薄膜感應器與面板之間多設置一層絕緣物質，然而，這種做法將會增加成本，並且導致整個面板裝置之厚度增加，不利於機構之設計。However, the conventional touch sensing method of the liquid crystal display has some serious shortcomings, such as the scanning rate is too low, the noise generated by the display panel seriously affects the operation of the touch control chip, and even leads to misjudgment of the touch point. Some systems provide a layer of insulating material between the conductive film sensor and the panel in order to avoid the noise generated by the panel. However, this method will increase the cost and increase the thickness of the entire panel device, which is disadvantageous to the mechanism. design.
因此，本發明提出一種互感式電容觸控感測裝置，以解決上述問題。Therefore, the present invention provides a mutual inductance capacitive touch sensing device to solve the above problems.
本發明之一範疇在於提供一種觸控感測裝置。於一實施例中，該觸控感測裝置包含複數個接腳、邏輯控制模組、至少一驅動/感測控制模組、至少一放大模組、至少一儲存控制模組及類比/數位轉換模組。邏輯控制模組係用以產生不同控制時序之複數個控制訊號。該等控制訊號包含驅動/感測控制訊號、放大控制訊號及儲存控制訊號。驅動/感測控制模組係耦接至邏輯控制模組及該等接腳，並係用以依照驅動/感測控制訊號控制該等接腳分別執行複數種接腳功能，致使該等接腳能夠自導電薄膜感應器之複數條感測線感測到複數個感測電壓。放大模組係耦接至邏輯控制模組及驅動/感測控制模組，並係用以自驅動/感測控制模組接收該等感測電壓中之一感測電壓，並依照放大控制訊號將感測電壓與預設電壓相減並放大後，輸出放大後之類比資料。儲存控制模組係耦接至邏輯控制模組及放大模組，並係用以依照儲存控制訊號儲存放大後之類比資料。類比/數位轉換模組係耦接於邏輯控制模組與儲存控制模組之間，用以將放大後之類比資料轉換成數位資料，並將數位資料輸出至邏輯控制模組。One aspect of the present invention is to provide a touch sensing device. In one embodiment, the touch sensing device includes a plurality of pins, a logic control module, at least one driving/sensing control module, at least one amplification module, at least one storage control module, and analog/digital conversion. Module. The logic control module is used to generate a plurality of control signals for different control timings. The control signals include a drive/sense control signal, an amplification control signal, and a storage control signal. The driving/sensing control module is coupled to the logic control module and the pins, and is configured to perform a plurality of pin functions respectively according to the driving/sensing control signals, so that the pins are A plurality of sensing voltages can be sensed from a plurality of sensing lines of the conductive film sensor. The amplifying module is coupled to the logic control module and the driving/sensing control module, and is configured to receive one of the sensing voltages from the driving/sensing control module, and according to the amplification control signal After subtracting and amplifying the sensing voltage from the preset voltage, the amplified analog data is output. The storage control module is coupled to the logic control module and the amplification module, and is configured to store the amplified analog data according to the storage control signal. The analog/digital conversion module is coupled between the logic control module and the storage control module for converting the amplified analog data into digital data and outputting the digital data to the logic control module.
於一實施例中，放大模組包含兩輸入端及一輸出端，該兩輸入端分別耦接驅動/感測控制模組及預設電壓，輸出端耦接儲存控制模組。In one embodiment, the amplifying module includes two input ends and an output end. The two input ends are respectively coupled to the driving/sensing control module and the preset voltage, and the output end is coupled to the storage control module.
於一實施例中，觸控感測裝置進一步包含第一開關。第一開關之一端耦接於驅動/感測控制模組與放大模組之間，另一端耦接至接地端。當第一開關開啟時，感測電壓係從驅動/感測控制模組輸出至放大模組；當放大模組接收到感測電壓後，第一開關關閉以進行導電薄膜放電(ITO discharge)。In an embodiment, the touch sensing device further includes a first switch. One end of the first switch is coupled between the driving/sensing control module and the amplifying module, and the other end is coupled to the ground. When the first switch is turned on, the sensing voltage is output from the driving/sense control module to the amplifying module; when the amplifying module receives the sensing voltage, the first switch is turned off to perform ITO discharge.
於一實施例中，儲存控制模組至少包含儲存開關及儲存電容。儲存開關之一端耦接於放大模組與類比/數位轉換模組之間，另一端耦接至儲存電容，並且儲存電容耦接至接地端。In one embodiment, the storage control module includes at least a storage switch and a storage capacitor. One end of the storage switch is coupled between the amplifying module and the analog/digital conversion module, the other end is coupled to the storage capacitor, and the storage capacitor is coupled to the ground.
於一實施例中，當儲存開關關閉時，放大模組所輸出之放大後之類比資料係透過儲存開關傳送至儲存電容。In an embodiment, when the storage switch is turned off, the amplified analog data output by the amplification module is transmitted to the storage capacitor through the storage switch.
於一實施例中，當儲存電容接收到放大後之類比資料後，儲存開關開啟以使得放大後之類比資料儲存於儲存電容中。In one embodiment, after the storage capacitor receives the amplified analog data, the storage switch is turned on to store the amplified analog data in the storage capacitor.
於一實施例中，觸控感測裝置進一步包含第二開關。第二開關之一端耦接於儲存控制模組與類比/數位轉換模組之間，另一端耦接至接地端。當第二開關開啟時，放大後之類比資料係從儲存控制模組輸出至類比/數位轉換模組。In an embodiment, the touch sensing device further includes a second switch. One end of the second switch is coupled between the storage control module and the analog/digital conversion module, and the other end is coupled to the ground. When the second switch is turned on, the amplified analog data is output from the storage control module to the analog/digital conversion module.
於一實施例中，觸控感測裝置進一步包含第三開關。第三開關耦接於放大模組與儲存控制模組之間。當第三開關開啟時，放大模組停止輸出放大後之類比資料。In an embodiment, the touch sensing device further includes a third switch. The third switch is coupled between the amplification module and the storage control module. When the third switch is turned on, the amplifying module stops outputting the amplified analog data.
於一實施例中，該等接腳功能包含驅動功能、感測功能、接地功能及浮接功能。In an embodiment, the pin functions include a driving function, a sensing function, a grounding function, and a floating function.
於一實施例中，邏輯控制模組包含數位濾波單元，用以對類比/數位轉換模組所輸入之數位資料進行數位濾波。In an embodiment, the logic control module includes a digital filtering unit for digitally filtering the digital data input by the analog/digital conversion module.
相較於先前技術，根據本發明之觸控感測裝置係利用單端輸入(single-ended)放大器及儲存控制模組實現類比濾波功能，並可結合邏輯控制模組所具有之數位濾波功能，不僅能夠有效地降低液晶顯示面板及外在環境所產生之雜訊對於觸控感測裝置感測觸控點時的干擾，亦不會導致整個系統的資料傳送回報速率(reporting rate)降低及電力消耗(power consumption)增加，故觸控感測裝置能夠更為準確地對於觸控顯示面板進行觸控點的感測，以大幅減少其誤判之機率。Compared with the prior art, the touch sensing device according to the present invention realizes the analog filtering function by using a single-ended amplifier and a storage control module, and can combine the digital filtering function of the logic control module. Not only can the noise generated by the liquid crystal display panel and the external environment be effectively reduced when the touch sensing device senses the touch point, and the data transmission return rate and power of the entire system are not reduced. The power consumption is increased, so that the touch sensing device can more accurately sense the touch point of the touch display panel, thereby greatly reducing the probability of misjudgment.
關於本發明之優點與精神可以藉由以下的發明詳述及所附圖式得到進一步的瞭解。The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.
根據本發明之一具體實施例為觸控感測裝置。於此實施例中，該觸控感測裝置可以是互感式電容觸控感測裝置，但不以此為限。A touch sensing device according to an embodiment of the invention. In this embodiment, the touch sensing device may be a mutual-capacitive capacitive touch sensing device, but is not limited thereto.
請參照圖1，圖1係繪示本發明之觸控感測裝置1對於顯示面板進行觸控點感測之示意圖。如圖1所示，液晶顯示器包含有導電薄膜感應器100以及觸控感測裝置1。至於液晶顯示面板一般是貼合在導電薄膜感應器100下，但不以此為限。觸控感測裝置1包含有邏輯控制模組10、複數個接腳20、至少一驅動/感測控制模組30、至少一放大模組40、至少一儲存控制模組50及類比/數位轉換模組60。Please refer to FIG. 1 . FIG. 1 is a schematic diagram of the touch sensing device 1 of the present invention performing touch point sensing on a display panel. As shown in FIG. 1 , the liquid crystal display includes a conductive film sensor 100 and a touch sensing device 1 . The liquid crystal display panel is generally attached to the conductive film sensor 100, but is not limited thereto. The touch sensing device 1 includes a logic control module 10, a plurality of pins 20, at least one driving/sensing control module 30, at least one amplification module 40, at least one storage control module 50, and analog/digital conversion. Module 60.
其中，接腳20耦接至驅動/感測控制模組30；驅動/感測控制模組30耦接至邏輯控制模組10、接腳20及放大模組40；放大模組40耦接至邏輯控制模組10、驅動/感測控制模組30及儲存控制模組50；儲存控制模組50耦接至邏輯控制模組10、放大模組40及類比/數位轉換模組60；類比/數位轉換模組60耦接至邏輯控制模組10及儲存控制模組50。The pin 20 is coupled to the driving/sensing control module 30; the driving/sensing control module 30 is coupled to the logic control module 10, the pin 20, and the amplifying module 40; the amplifying module 40 is coupled to The logic control module 10, the driving/sensing control module 30 and the storage control module 50; the storage control module 50 is coupled to the logic control module 10, the amplification module 40, and the analog/digital conversion module 60; analogy/ The digital conversion module 60 is coupled to the logic control module 10 and the storage control module 50.
於此實施例中，邏輯控制模組10係用以產生不同控制時序之複數個控制訊號並將其輸出至驅動/感測控制模組30、放大模組40及儲存控制模組50。實際上，該等控制訊號可包含有驅動/感測控制訊號、放大控制訊號及儲存控制訊號，但不以此為限。In this embodiment, the logic control module 10 is configured to generate a plurality of control signals of different control timings and output them to the driving/sensing control module 30, the amplification module 40, and the storage control module 50. In fact, the control signals may include drive/sensing control signals, amplification control signals, and storage control signals, but are not limited thereto.
如圖1所示，導電薄膜感應器100包含有互相垂直分布的複數條感測線80及複數條驅動線90。需說明的是，驅動線90與感測線80是可互換的，也就是說圖1中的90實際上也可當感測線，圖1中的80實際上也可當驅動線，可由觸控感測裝置1所控制。As shown in FIG. 1, the conductive film sensor 100 includes a plurality of sensing lines 80 and a plurality of driving lines 90 that are vertically distributed with each other. It should be noted that the driving line 90 and the sensing line 80 are interchangeable, that is, the 90 in FIG. 1 can also be used as a sensing line, and the 80 in FIG. 1 can also be used as a driving line. Control device 1 controls.
需說明的是，該等接腳20不只具有單一種功能，而是可以視實際需求於不同功能之間進行切換，例如驅動(driving)功能、感測(sensing)功能、接地(ground)功能或浮接(floating)功能，但不以此為限。每一個驅動/感測控制模組30係根據該等控制訊號中之感測控制訊號控制該等接腳20執行感測功能，以透過導電薄膜感應器100之該等感測線80或90感測到複數筆類比資料。It should be noted that the pins 20 not only have a single function, but can switch between different functions according to actual needs, such as a driving function, a sensing function, a ground function, or Floating function, but not limited to this. Each of the driving/sensing control modules 30 controls the pins 20 to perform a sensing function according to the sensing control signals in the control signals to sense the sensing lines 80 or 90 of the conductive film sensor 100. To multiple analog data.
舉例而言，如圖2所示，假設該等接腳20包含有接腳S1~S3，驅動/感測控制模組30包含有第一組開關SW11~SW13、第二組開關SW21~SW23及第三組開關SW31~SW33。其中，第一組開關SW11~SW13係耦接並對應於接腳S1；第二組開關SW21~SW23係耦接並對應於接腳S2；第三組開關SW31~SW33係耦接並對應於接腳S3。實際上，接腳以及其相對應之開關組的數目可視實際需求而調整，並不以此例為限。For example, as shown in FIG. 2 , it is assumed that the pins 20 include pins S1 S S3 , and the driving/sensing control module 30 includes a first group of switches SW11 SW SW13 and a second group of switches SW21 SW SW23 . The third group of switches SW31~SW33. The first group of switches SW11~SW13 are coupled and corresponding to the pin S1; the second group of switches SW21~SW23 are coupled to the pin S2; the third group of switches SW31~SW33 are coupled and corresponding to the connection Foot S3. In fact, the number of pins and their corresponding switch groups can be adjusted according to actual needs, and is not limited to this example.
在此，以接腳S1與相對應的第一組開關SW11~SW13為例進行說明。當開關SW11關閉且開關SW12及SW13開啟時，接腳S1即透過感測線80或90對導電薄膜感應器100執行感測功能以得到第一感測電壓，並透過開關SW11將第一感測電壓輸出至放大模組40。當開關SW12關閉且開關SW11及SW13開啟時，接腳S1即自邏輯控制模組10接收驅動脈波訊號以執行驅動功能。當開關SW13關閉且開關SW11及SW12開啟時，接腳S1即耦接至接地端以執行接地功能。Here, the pin S1 and the corresponding first group of switches SW11 to SW13 will be described as an example. When the switch SW11 is turned off and the switches SW12 and SW13 are turned on, the pin S1 performs a sensing function on the conductive thin film sensor 100 through the sensing line 80 or 90 to obtain a first sensing voltage, and the first sensing voltage is transmitted through the switch SW11. The output is output to the amplification module 40. When the switch SW12 is turned off and the switches SW11 and SW13 are turned on, the pin S1 receives the driving pulse signal from the logic control module 10 to perform the driving function. When the switch SW13 is turned off and the switches SW11 and SW12 are turned on, the pin S1 is coupled to the ground to perform a grounding function.
同理，對於接腳S2與相對應的第二組開關SW21~SW23而言，當開關SW21關閉且開關SW22及SW23開啟時，接腳S2即透過感測線80或90對導電薄膜感應器100執行感測功能以得到第二感測電壓，並透過開關SW21將第二感測電壓輸出至放大模組40。當開關SW22關閉且開關SW21及SW23開啟時，接腳S2即自邏輯控制模組10接收驅動脈波訊號以執行驅動功能。當開關SW23關閉且開關SW21及SW22開啟時，接腳S2即耦接至接地端以執行接地功能。至於接腳S3與相對應的第三組開關SW31~SW33之運作情形亦可依上述類推，故於此不另贅述。Similarly, for the pin S2 and the corresponding second group of switches SW21~SW23, when the switch SW21 is turned off and the switches SW22 and SW23 are turned on, the pin S2 is performed on the conductive thin film sensor 100 through the sensing line 80 or 90. The sensing function is used to obtain a second sensing voltage, and the second sensing voltage is output to the amplification module 40 through the switch SW21. When the switch SW22 is turned off and the switches SW21 and SW23 are turned on, the pin S2 receives the driving pulse signal from the logic control module 10 to perform the driving function. When the switch SW23 is turned off and the switches SW21 and SW22 are turned on, the pin S2 is coupled to the ground to perform a grounding function. The operation of the pin S3 and the corresponding third group of switches SW31 to SW33 can also be analogized as described above, and therefore will not be further described herein.
於此實施例中，放大模組40包含兩輸入端及輸出端。舉例而言，如圖2所示，放大模組40之正輸入端+耦接至驅動/感測控制模組30，放大模組40之負輸入端－耦接至預設電壓VR ，放大模組40之輸出端透過開關SW7耦接至儲存控制模組50。放大模組40透過正輸入端+自驅動/感測控制模組30接收感測電壓(亦即第一感測電壓、第二感測電壓或第三感測電壓)，並依照該等控制訊號中之放大控制訊號將此感測電壓與預設電壓VR 相減並放大後，再由輸出端輸出放大後之類比資料。於實際應用中，放大模組40可為單端輸入式(single-ended)放大器，亦可將放大模組40之正輸入端+耦接至預設電壓VR ，負輸入端一耦接至驅動/感測控制模組30。預設電壓VR 可視實際需求而調整，並無特定之限制。In this embodiment, the amplification module 40 includes two input ends and an output end. For example, as shown in FIG. 2, the positive input terminal of the amplifying module 40 is coupled to the driving/sensing control module 30, and the negative input terminal of the amplifying module 40 is coupled to the preset voltage V R to amplify The output end of the module 40 is coupled to the storage control module 50 through the switch SW7. The amplification module 40 receives the sensing voltage (ie, the first sensing voltage, the second sensing voltage, or the third sensing voltage) through the positive input terminal + the self-driving/sensing control module 30, and according to the control signals The amplification control signal in the middle subtracts and amplifies the sensing voltage from the preset voltage V R , and then outputs the amplified analog data from the output terminal. In an actual application, the amplifying module 40 can be a single-ended amplifier, and the positive input terminal of the amplifying module 40 can be coupled to the preset voltage V R , and the negative input terminal is coupled to the Drive/sense control module 30. The preset voltage V R can be adjusted according to actual needs, and there is no specific limit.
如圖2所示，觸控感測裝置1更包含有第一開關SW4。第一開關SW4之一端耦接於驅動/感測控制模組30與放大模組40之間，其另一端則耦接至接地端。以第一感測電壓為例，當第一開關SW4開啟時，第一感測電壓即可從驅動/感測控制模組30輸出至放大模組40；當放大模組40接收到第一感測電壓後，第一開關SW4將會關閉並控制導電薄膜感應器100執行放電(discharge)程序，藉以避免環境雜訊干擾控制晶片的運作及導電薄膜感應器100上殘留的電荷影響到接腳20感測時之準確性。As shown in FIG. 2 , the touch sensing device 1 further includes a first switch SW4 . One end of the first switch SW4 is coupled between the driving/sensing control module 30 and the amplifying module 40, and the other end is coupled to the ground. Taking the first sensing voltage as an example, when the first switch SW4 is turned on, the first sensing voltage can be output from the driving/sense control module 30 to the amplifying module 40; when the amplifying module 40 receives the first sense After the voltage is measured, the first switch SW4 will be turned off and the conductive film sensor 100 is controlled to perform a discharge process to avoid environmental noise interference controlling the operation of the wafer and the residual charge on the conductive film sensor 100 affecting the pin 20 Accuracy during sensing.
如圖2所示，觸控感測裝置1更包含有耦接於放大模組40之輸出端與儲存控制模組50之間的第三開關SW7。觸控感測裝置1藉由第三開關SW7的開啟或關閉，即可控制放大後之類比資料是否可以進入後面的儲存控制模組50及類比/數位轉換模組60。當第三開關SW7關閉時，放大模組40之輸出端所輸出的放大後之類比資料即可透過第三開關SW7傳送至儲存控制模組50；當第三開關SW7開啟時，放大模組40停止輸出放大後之類比資料至儲存控制模組50。As shown in FIG. 2 , the touch sensing device 1 further includes a third switch SW7 coupled between the output end of the amplification module 40 and the storage control module 50 . The touch sensing device 1 can control whether the amplified analog data can enter the subsequent storage control module 50 and the analog/digital conversion module 60 by turning on or off the third switch SW7. When the third switch SW7 is turned off, the amplified analog data outputted by the output end of the amplifying module 40 can be transmitted to the storage control module 50 through the third switch SW7; when the third switch SW7 is turned on, the amplifying module 40 The output of the amplified analog data is stopped to the storage control module 50.
當放大模組40之輸出端所輸出的放大後之類比資料透過第三開關SW7傳送至儲存控制模組50後，儲存控制模組50將會依照儲存控制訊號儲存放大後之類比資料。舉例而言，如圖2所示，儲存控制模組50可包含有儲存開關SW6及儲存電容C。儲存開關SW6之一端耦接於放大模組40與類比/數位轉換模組60之間，另一端則耦接至儲存電容C，並且儲存電容C耦接至接地端。當儲存開關SW6關閉時，放大模組40所輸出的放大後之類比資料能夠透過儲存開關SW6傳送至儲存電容C。當儲存電容C接收到放大後之類比資料後，儲存開關SW6將會開啟以使得放大後之類比資料儲存於儲存電容C中。After the amplified analog data outputted from the output of the amplifier module 40 is transmitted to the storage control module 50 through the third switch SW7, the storage control module 50 stores the amplified analog data according to the storage control signal. For example, as shown in FIG. 2, the storage control module 50 can include a storage switch SW6 and a storage capacitor C. One end of the storage switch SW6 is coupled between the amplifying module 40 and the analog/digital conversion module 60, the other end is coupled to the storage capacitor C, and the storage capacitor C is coupled to the ground. When the storage switch SW6 is turned off, the amplified analog data output by the amplification module 40 can be transmitted to the storage capacitor C through the storage switch SW6. After the storage capacitor C receives the amplified analog data, the storage switch SW6 will be turned on to store the amplified analog data in the storage capacitor C.
如圖2所示，觸控感測裝置1更包含有第二開關SW5。第二開關SW5之一端耦接於儲存控制模組50與類比/數位轉換模組60之間，另一端則耦接至接地端。當第二開關SW5開啟時，儲存控制模組50所儲存的放大後之類比資料得以從儲存控制模組50輸出至類比/數位轉換模組60。當儲存控制模組50所儲存的放大後之類比資料已輸出之後，儲存控制模組50內即不再儲存有放大後之類比資料，第二開關SW5將會關閉，致使儲存電容C執行放電程序，以消除儲存電容C上殘留的電荷，避免儲存電容C之後再次儲存另一筆放大後之類比資料時受到這些殘留電荷之影響。As shown in FIG. 2 , the touch sensing device 1 further includes a second switch SW5 . One end of the second switch SW5 is coupled between the storage control module 50 and the analog/digital conversion module 60, and the other end is coupled to the ground. When the second switch SW5 is turned on, the amplified analog data stored by the storage control module 50 is output from the storage control module 50 to the analog/digital conversion module 60. After the amplified analog data stored in the storage control module 50 has been output, the amplified analog data is no longer stored in the storage control module 50, and the second switch SW5 is turned off, causing the storage capacitor C to perform the discharging process. In order to eliminate the residual charge on the storage capacitor C, it is not affected by the residual charge when the storage capacitor C is stored again after storing another amplified analog data.
接著，當類比/數位轉換模組60接收到放大後之類比資料後，類比/數位轉換模組60即會將放大後之類比資料轉換成數位資料，並將轉換後的數位資料輸出至邏輯控制模組10。Then, after the analog/digital conversion module 60 receives the amplified analog data, the analog/digital conversion module 60 converts the amplified analog data into digital data, and outputs the converted digital data to the logic control. Module 10.
觸控感測裝置1除了可根據上述運作方式實現類比濾波功能外，觸控感測裝置1之邏輯控制模組10亦可包含數位濾波單元102。數位濾波單元102係用以對類比/數位轉換模組60所輸入之數位資料進行數位濾波，以更進一步減少液晶顯示面板及外在環境所產生之雜訊對於觸控感測裝置1感測觸控點時的干擾。In addition to the analog filtering function of the touch sensing device 1 , the logic control module 10 of the touch sensing device 1 may also include a digital filtering unit 102 . The digital filtering unit 102 is configured to perform digital filtering on the digital data input by the analog/digital conversion module 60 to further reduce the noise generated by the liquid crystal display panel and the external environment for sensing the touch sensing device 1 . Interference at the point of control.
需說明的是，上述實施例中所提到的觸控感測裝置1中之所有開關的開啟或關閉順序及方式並不以此為限，亦可視實際需求進行調整，以提升裝置的掃瞄速度及回報速率。It should be noted that the order and manner of turning on or off all the switches in the touch sensing device 1 mentioned in the above embodiments are not limited thereto, and may be adjusted according to actual needs to improve the scanning of the device. Speed and return rate.
相較於先前技術，根據本發明之觸控感測裝置係利用單端輸入放大器及儲存控制模組實現類比濾波功能，並可結合邏輯控制模組所具有之數位濾波功能，不僅能夠有效地降低液晶顯示面板及外在環境所產生之雜訊對於觸控感測裝置感測觸控點時的干擾，亦不會導致整個系統的資料傳送回報速率降低及電力消耗增加，故觸控感測裝置能夠更為準確地對於觸控顯示面板進行觸控點的感測，以大幅減少其誤判之機率。Compared with the prior art, the touch sensing device according to the present invention realizes the analog filtering function by using the single-ended input amplifier and the storage control module, and can combine the digital filtering function of the logic control module, which can effectively reduce not only The noise generated by the liquid crystal display panel and the external environment does not cause the interference of the touch sensing device when sensing the touch point, nor does it cause the data transmission return rate of the entire system to decrease and the power consumption to increase, so the touch sensing device It can more accurately sense the touch point of the touch display panel to greatly reduce the probability of misjudgment.
藉由以上較佳具體實施例之詳述，係希望能更加清楚描述本發明之特徵與精神，而並非以上述所揭露的較佳具體實施例來對本發明之範疇加以限制。相反地，其目的是希望能涵蓋各種改變及具相等性的安排於本發明所欲申請之專利範圍的範疇內。The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.
1．．．觸控感測裝置1. . . Touch sensing device
10．．．邏輯控制模組10. . . Logic control module
20、S1~S3．．．接腳20, S1~S3. . . Pin
30．．．驅動/感測控制模組30. . . Drive/sense control module
100．．．導電薄膜感應器100. . . Conductive film sensor
40．．．放大模組40. . . Amplification module
50．．．儲存控制模組50. . . Storage control module
60．．．類比/數位轉換模組60. . . Analog/digital conversion module
80．．．感測線80. . . Sensing line
90．．．驅動線90. . . Drive line
102．．．數位濾波單元102. . . Digital filtering unit
VR ．．．預設電壓V R . . . Preset voltage
+．．．正輸入端+. . . Positive input
－．．．負輸入端-. . . Negative input
SW11~SW13、SW21~SW23、SW31~SW33．．．開關SW11~SW13, SW21~SW23, SW31~SW33. . . switch
C．．．儲存電容C. . . Storage capacitor
SW4．．．第一開關SW4. . . First switch
SW5．．．第二開關SW5. . . Second switch
SW6．．．儲存開關SW6. . . Storage switch
SW7．．．第三開關SW7. . . Third switch
圖1係繪示本發明之觸控感測裝置對導電薄膜感應器進行觸控點感測之示意圖。FIG. 1 is a schematic diagram showing touch sensing of a conductive film sensor by a touch sensing device of the present invention.
圖2係繪示本發明之觸控感測裝置之實施例示意圖。2 is a schematic view showing an embodiment of a touch sensing device of the present invention.
1．．．觸控感測裝置1. . . Touch sensing device
10．．．邏輯控制模組10. . . Logic control module
20．．．接腳20. . . Pin
30．．．驅動/感測控制模組30. . . Drive/sense control module
100．．．導電薄膜感應器100. . . Conductive film sensor
40．．．放大模組40. . . Amplification module
50．．．儲存控制模組50. . . Storage control module
60．．．類比/數位轉換模組60. . . Analog/digital conversion module
80．．．感測線80. . . Sensing line
90．．．驅動線90. . . Drive line
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| US20080162997A1 (en) * | 2007-01-03 | 2008-07-03 | Apple Inc. | Channel scan logic |
| TW201023129A (en) * | 2008-10-30 | 2010-06-16 | Samsung Electronics Co Ltd | Touch controller having increased sensing sensitivity, and display driving circuit and display device and system having the touch controller |
| TW201101159A (en) * | 2009-06-25 | 2011-01-01 | Elan Microelectronics Corp | Object location detection device for capacitive touch panel and the method thereof |
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| CN101571782B (en) * | 2009-06-16 | 2011-01-19 | 友达光电股份有限公司 | Touch-control type panel and method for judging the generation position of touch-control signal |
| JP5396167B2 (en) * | 2009-06-18 | 2014-01-22 | 株式会社ワコム | Indicator detection apparatus and indicator detection method |
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| US20080162997A1 (en) * | 2007-01-03 | 2008-07-03 | Apple Inc. | Channel scan logic |
| TW201023129A (en) * | 2008-10-30 | 2010-06-16 | Samsung Electronics Co Ltd | Touch controller having increased sensing sensitivity, and display driving circuit and display device and system having the touch controller |
| TW201101159A (en) * | 2009-06-25 | 2011-01-01 | Elan Microelectronics Corp | Object location detection device for capacitive touch panel and the method thereof |
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