TWI573058B - Touch sensing device, in-cell touch screen and concurrent sensing circuit - Google Patents

觸控感測裝置、內嵌式觸控螢幕與並行式感測電路Touch sensing device, in-cell touch screen and parallel sensing circuit

本發明係有關觸控感測，特別是關於一種適用於觸控面板與內嵌式觸控螢幕的並行式（concurrent）感測電路。The present invention relates to touch sensing, and more particularly to a concurrent sensing circuit suitable for a touch panel and an in-cell touch screen.

觸控感測裝置可聯合顯示器以形成觸控顯示器，其結合了觸控技術與顯示技術，使得使用者可直接與所顯示物件進行互動。電容式觸控感測為眾多不同觸控感測技術的其中一種。The touch sensing device can be combined with the display to form a touch display, which combines touch technology and display technology so that the user can directly interact with the displayed object. Capacitive touch sensing is one of many different touch sensing technologies.

電容式觸控感測裝置包含電導體（例如氧化銦錫）與絕緣體（例如玻璃）。當人體（其作為另一電導體）觸碰電容式觸控感測裝置的表面時，會改變所形成的靜電場，其反應在電容值的改變，可據以決定觸碰位置。The capacitive touch sensing device includes an electrical conductor (such as indium tin oxide) and an insulator (such as glass). When the human body (which acts as another electrical conductor) touches the surface of the capacitive touch sensing device, the formed electrostatic field is changed, and the reaction changes in the capacitance value to determine the touch position.

互電容（mutual-capacitance）觸控感測裝置為電容式觸控感測裝置的一種。第一A圖顯示互電容觸控感測裝置100的示意圖，其由列電極與行電極所組成，例如第一A圖所例示的3x5陣列。驅動信號施於傳送端TX1~TX3，且於接收端RX1~RX5收集感測信號。The mutual-capacitance touch sensing device is a type of capacitive touch sensing device. The first A diagram shows a schematic diagram of the mutual capacitance touch sensing device 100, which is composed of column electrodes and row electrodes, such as the 3x5 array illustrated in FIG. The driving signal is applied to the transmitting terminals TX1~TX3, and the sensing signals are collected at the receiving ends RX1~RX5.

自電容（self-capacitance）觸控感測裝置為另一種電容式觸控感測裝置。第一B圖顯示自電容觸控感測裝置102的示意圖，其由列電極與行電極所組成，例如第一B圖所例示的3x5陣列。不同於互電容觸控感測裝置100，自電容觸控感測裝置102僅具有接收端RX11~RX15與RX21~RX23，藉以收集感測信號。The self-capacitance touch sensing device is another capacitive touch sensing device. The first B diagram shows a schematic diagram of a self-capacitive touch sensing device 102 that is composed of column electrodes and row electrodes, such as the 3x5 array illustrated in FIG. Unlike the mutual-capacitive touch sensing device 100, the self-capacitive touch sensing device 102 has only receiving terminals RX11 R RX15 and RX21 R RX 23 to collect sensing signals.

無論是互電容觸控感測裝置100或者是自電容觸控感測裝置102，每一接收端（RX）相應耦接一接收電路（或接收單元）11，例如類比至數位轉換器（ADC）。如第一A圖或第一B圖所示架構，接收電路11的數目等於接收端的數目。因此，該些架構需要大電路面積與成本，特別是對於大尺寸觸控感測裝置。對於空間或電源受到限制的小尺寸觸控感測裝置，第一A圖或第一B圖所示架構同樣具有缺失。Each receiving end (RX) is coupled to a receiving circuit (or receiving unit) 11 , such as an analog to digital converter (ADC ), for example, a mutual capacitive touch sensing device 100 or a self-capacitive touch sensing device 102 . . As shown in the first A diagram or the first B diagram, the number of receiving circuits 11 is equal to the number of receiving terminals. Therefore, these architectures require large circuit area and cost, especially for large size touch sensing devices. For small-sized touch sensing devices where space or power is limited, the architecture shown in the first A or the first B is also missing.

為了改善前述缺失，第二A圖與第二B圖提出一種改良架構，其觸控感測裝置200所使用的接收電路11的數目少於接收端（RX）的數目。首先，如第二A圖所示的第一階段，接收電路11接收（並處理）相應於部分接收端（例如RX1~RX3）的感測信號。接著，如第二B圖所示的第二階段，相同的接收電路11接收（並處理）相應於其餘接收端（例如RX4~RX6）的感測信號。由於第二A圖與第二B圖的接收電路11採用分時（time-sharing）方式，因此其架構於處理所有感測信號時，會造成時間延遲。此缺失對於內嵌式（in-cell）觸控顯示器會更為嚴重，因為其顯示與觸控感測係依序執行的，因此觸控感測的有效時間較一般觸控感測裝置（例如第一A圖或第一B圖所示者）來得短。In order to improve the aforementioned deficiency, the second A diagram and the second B diagram propose an improved architecture in which the number of receiving circuits 11 used by the touch sensing device 200 is less than the number of receiving terminals (RX). First, as in the first stage shown in FIG. 2A, the receiving circuit 11 receives (and processes) a sensing signal corresponding to a part of the receiving ends (for example, RX1 to RX3). Next, as in the second stage shown in FIG. B, the same receiving circuit 11 receives (and processes) the sensing signals corresponding to the remaining receiving ends (for example, RX4 to RX6). Since the receiving circuit 11 of the second A picture and the second B picture adopts a time-sharing manner, its architecture causes a time delay when processing all the sensing signals. This lack of in-cell touch display is more serious because the display and the touch sensing system are sequentially executed, so the effective time of the touch sensing is higher than that of the general touch sensing device (for example, The first A picture or the first B picture) is short.

鑑於傳統觸控感測裝置具有大電路面積或長延遲的缺點，因此亟需提出一種新穎的觸控感測裝置或內嵌式觸控螢幕，用以降低電路面積且不會產生長延遲。In view of the disadvantages of the conventional touch sensing device having a large circuit area or a long delay, it is desirable to provide a novel touch sensing device or an in-cell touch screen for reducing the circuit area without causing a long delay.

鑑於上述，本發明實施例的目的之一在於提出一種適用於觸控面板或內嵌式觸控螢幕的並行式感測電路，用以節省電路面積與成本，又不會產生延遲。In view of the above, one of the objectives of the embodiments of the present invention is to provide a parallel sensing circuit suitable for a touch panel or an in-cell touch screen to save circuit area and cost without delay.

根據本發明實施例，觸控感測裝置包含觸控面板、複數和電路及複數接收電路。觸控面板包含列電極與行電極。每一和電路具複數輸入端，用以接收觸控面板之相應接收端所提供的複數感測信號，每一和電路的該些輸入端加總或減去該些感測信號，因而產生和信號於和電路的相應輸出端。該些接收電路分別耦接於該些和電路的輸出端，用以處理和信號，因而分別產生和值，據以決定觸碰位置。於另一實施例中，每一和電路的該些輸入端對該些感測信號執行加運算或無運算，因而產生一和信號於該和電路的相應輸出端。According to an embodiment of the invention, a touch sensing device includes a touch panel, a complex sum circuit, and a plurality of receiving circuits. The touch panel includes a column electrode and a row electrode. Each of the sum circuit has a plurality of input terminals for receiving the plurality of sensing signals provided by the corresponding receiving ends of the touch panel, and the input terminals of each of the summing circuits add or subtract the sensing signals, thereby generating a sum The signal is at the corresponding output of the sum circuit. The receiving circuits are respectively coupled to the outputs of the summing circuits for processing the sum signal, thereby generating sum values respectively for determining the touch position. In another embodiment, the inputs of each AND circuit perform an add operation or no operation on the sense signals, thereby generating a sum signal at a corresponding output of the sum circuit.

第三圖顯示本發明實施例之觸控感測裝置300的示意圖。本實施例之觸控感測裝置300可結合顯示器以形成觸控螢幕，但不限定於此。The third figure shows a schematic diagram of the touch sensing device 300 of the embodiment of the present invention. The touch sensing device 300 of the present embodiment can be combined with a display to form a touch screen, but is not limited thereto.

本實施例之觸控感測裝置300包含觸控面板31，及適用於觸控面板31的並行式感測電路32。觸控面板31可為電阻式觸控面板、電容式觸控面板或光學式觸控面板。觸控面板31可包含列電極與行電極，例如第三圖所例示的3x6陣列。在本實施例中，接收端RX1~RX6相應於行電極，且於接收端RX1~RX6提供（或產生）感測信號。The touch sensing device 300 of the present embodiment includes a touch panel 31 and a parallel sensing circuit 32 suitable for the touch panel 31. The touch panel 31 can be a resistive touch panel, a capacitive touch panel, or an optical touch panel. The touch panel 31 can include column electrodes and row electrodes, such as the 3x6 array illustrated in the third figure. In this embodiment, the receiving ends RX1 R RX6 correspond to the row electrodes, and the sensing signals are provided (or generated) at the receiving ends RX1 R RX6.

本實施例之並行式感測電路32包含複數和（summing）電路321。每一和電路321具複數輸入端，用以接收相應接收端的複數感測信號。例如，第三圖右側和電路321具三個輸入端，用以接收相應接收端RX1~RX3的三個感測信號。類似的情形，第三圖左側和電路321具三個輸入端，用以接收相應接收端RX4~RX6的三個感測信號。值得注意的是，每一接收端相應一個且僅一個和電路321。根據本實施例的特徵之一，和電路321係用以加總或減去感測信號，因而於相應輸出端產生一和信號。The parallel type sensing circuit 32 of the present embodiment includes a summing circuit 321. Each sum circuit 321 has a plurality of input terminals for receiving complex sensing signals of the respective receiving ends. For example, the right side of the third figure and the circuit 321 have three inputs for receiving three sensing signals of the corresponding receiving ends RX1 R RX3. In a similar situation, the left side of the third figure and the circuit 321 have three inputs for receiving three sensing signals of the corresponding receiving ends RX4 to RX6. It is worth noting that each receiving end has one and only one sum circuit 321 . According to one of the features of the present embodiment, the sum circuit 321 is for summing or subtracting the sensed signals, thereby producing a sum signal at the respective output.

本實施例之並行式感測電路32還包含複數接收電路（或接收單元）322，例如類比至數位轉換器。該些接收電路322分別耦接至相應和電路321的輸出端。在本實施例中，和電路321的數目等於接收電路322的數目。接收電路322係用以處理和信號，因而產生一和值，據以決定觸碰位置。The parallel sense circuit 32 of the present embodiment also includes a complex receive circuit (or receive unit) 322, such as an analog to digital converter. The receiving circuits 322 are respectively coupled to the outputs of the respective sum circuits 321 . In the present embodiment, the number of sum circuits 321 is equal to the number of receiving circuits 322. The receiving circuit 322 is for processing the sum signal, thereby generating a sum value to determine the touch position.

第四圖例示第三圖之和電路321的時序。第四圖僅顯示時間t₀ 至t₃ 的時序，經重複可得到接續的時序。於圖式中，RX1~RX6表示相應感測信號，“+”表示和電路321對相應感測信號執行加運算，且“-” 表示和電路321對相應感測信號執行減運算。在本實施例的三個期間，和電路321之輸入端的加運算與減運算的組合互異。例如，於時間t₀ ，和電路321具“+,+,-”運算組合，於時間t₁ ，和電路321具“+,-,+”運算組合，且於時間t₂ ，和電路321具“-,+,+”運算組合。一般來說，於n連續期間，和電路321之n個輸入端的加運算與減運算的組合互異，其中n為大於二的正整數。The fourth diagram illustrates the timing of the sum circuit 321 of the third figure. The fourth graph only shows the timing of time t ₀ to t ₃ , and the repetition timing can be obtained. In the drawing, RX1 to RX6 indicate respective sensing signals, "+" indicates that sum circuit 321 performs an addition operation on the corresponding sensing signal, and "-" indicates that sum circuit 321 performs a subtraction operation on the corresponding sensing signal. In the three periods of the present embodiment, the combination of the addition and subtraction operations of the input terminal of the circuit 321 is different. For example, at time t ₀ , the sum circuit 321 has a combination of "+, +, -" operations. At time t ₁ , the sum circuit 321 has a combination of "+, -, +" operations, and at time t ₂ , the sum circuit 321 has "-, +, +" operation combination. In general, during the n consecutive periods, the combination of the addition and subtraction operations of the n inputs of circuit 321 is different, where n is a positive integer greater than two.

假設右側和電路321於第四圖的三個期間內，自接收電路322依序得到和值為a、b與c，其可表示為：或 Assuming that the right side and the circuit 321 are in the three periods of the fourth figure, the sum values from the receiving circuit 322 are sequentially obtained as a, b, and c, which can be expressed as: or

自接收電路322接收到和值a、b與c之後，即可據以得到感測信號RX1~RX3。After the receiving circuit 322 receives the sum values a, b, and c, the sensing signals RX1 R RX3 can be obtained accordingly.

第五圖顯示第三圖之和電路321的電路圖。於圖式中，C_RX1 、C_RX2 與C_RX3 表示觸控面板31之接收端RX1~RX3的等效電容。對於接收端RX1相應的輸入端，當執行加運算時，閉合第一開關SW_RX1 以接收預設正電壓（例如3V）；否則，當執行減運算時，閉合第二開關~SW_RX1 以接地。類似的情形，對於接收端RX2相應的輸入端，當執行加運算時，閉合第一開關SW_RX2 以接收預設正電壓（例如3V）；否則，當執行減運算時，閉合第二開關~SW_RX2 以接地。再者，對於接收端RX3相應的輸入端，當執行加運算時，閉合第一開關SW_RX3 以接收預設正電壓（例如3V）；否則，當執行減運算時，閉合第二開關~SW_RX3 以接地。The fifth diagram shows the circuit diagram of the sum circuit 321 of the third figure. In the drawings, C _RX1 , C _RX2 and C _RX3 represent equivalent capacitances of the receiving ends RX1 to RX3 of the touch panel 31. For the corresponding input terminal of the receiving terminal RX1, when the adding operation is performed, the first switch SW _RX1 is closed to receive a preset positive voltage (for example, 3V); otherwise, when the subtracting operation is performed, the second switch ~SW _{RX1 is} closed to be grounded. In a similar situation, for the corresponding input end of the receiving end RX2, when performing the adding operation, the first switch SW _RX2 is closed to receive a preset positive voltage (for example, 3V); otherwise, when the subtraction operation is performed, the second switch ~SW is closed. _RX2 is grounded. Furthermore, for the corresponding input end of the receiving end RX3, when the adding operation is performed, the first switch SW _RX3 is closed to receive a preset positive voltage (for example, 3V); otherwise, when the subtraction operation is performed, the second switch ~SW _{RX3 is} closed. With grounding.

相應於觸控面板31之接收端RX1~RX3的等效電容C_RX1 、C_RX2 與C_RX3 耦接於節點S，後接一放大器51（例如運算放大器）。電容器C耦接於放大器51的輸出端與輸入端之間。當執行加運算時對電容器C充電，而當執行減運算時則對電容器C放電。The equivalent capacitances C _RX1 , C _RX2 and C _RX3 corresponding to the receiving ends RX1 R RX3 of the touch panel 31 are coupled to the node S, followed by an amplifier 51 (for example, an operational amplifier). The capacitor C is coupled between the output end of the amplifier 51 and the input end. The capacitor C is charged when the addition operation is performed, and the capacitor C is discharged when the subtraction operation is performed.

根據上述實施例，由於接收電路32的數目少於接收端，因而可以節省電路面積與成本，因此本實施例較第一A圖或第一B圖之架構更能適用於大尺寸觸控感測裝置。此外，由於接收電路32同時處理所有感測信號，而非如第二A/二B圖所示的分時方式，因此本實施例不會產生延遲。According to the above embodiment, since the number of the receiving circuits 32 is less than the receiving end, the circuit area and the cost can be saved. Therefore, the embodiment is more suitable for the large-sized touch sensing than the first A or the first B. Device. Furthermore, since the receiving circuit 32 simultaneously processes all of the sensing signals instead of the time sharing manner as shown in the second A/B diagram, the present embodiment does not cause a delay.

第六圖顯示根據第四圖操作的感測信號RX1~RX6的時序圖。和電路321的每ㄧ輸入端相應有加運算或減運算。因此，於所有時間週期（例如t₀ 至t₃ ）都會執行充電或放電。The sixth figure shows a timing chart of the sensing signals RX1 to RX6 operated in accordance with the fourth figure. Each input terminal of the sum circuit 321 has an addition operation or a subtraction operation. Therefore, charging or discharging is performed for all time periods (for example, t ₀ to t ₃ ).

對於自電容內嵌式觸控螢幕（以下簡稱觸控螢幕），顯示面板的共電壓（VCOM）層會切割為多個共電壓電極，於觸控感測模式時，作為感測點（或接收（RX）電極）；且於顯示模式時，該些共電壓電極連接至一共電壓（例如直流電壓）。For a self-capacitance in-cell touch screen (hereinafter referred to as a touch screen), the common voltage (VCOM) layer of the display panel is cut into a plurality of common voltage electrodes, and is used as a sensing point (or receiving) in the touch sensing mode. (RX) electrode); and in the display mode, the common voltage electrodes are connected to a common voltage (eg, a DC voltage).

對於小型化觸控螢幕，共電壓電極、源極線與閘極線彼此非常接近，因此觸控螢幕具有雜散電容。第七圖顯示共電壓電極、源極線與閘極線的等效電容之電路圖。VCOM1、VCOM2與VCOM3表示三個相鄰共電壓電極。C_C1 與C_C2 表示共電壓電極之間的等效電容。C_S1 、C_S2 與C_S3 表示共電壓電極（亦即，VCOM1、VCOM2與VCOM3）與位於下方的源極線之間的等效電容。C_G1 、C_G2 與C_G3 表示共電壓電極（亦即，VCOM1、VCOM2與VCOM3）與位於下方的閘極線之間的等效電容。For miniaturized touch screens, the common voltage electrode, source line and gate line are very close to each other, so the touch screen has stray capacitance. The seventh figure shows the circuit diagram of the equivalent capacitance of the common voltage electrode, the source line and the gate line. VCOM1, VCOM2 and VCOM3 represent three adjacent common voltage electrodes. C _C1 and C _C2 represent the equivalent capacitance between the common voltage electrodes. C _S1 , C _S2 and C _S3 represent the equivalent capacitance between the common voltage electrodes (ie, VCOM1, VCOM2, and VCOM3) and the source line located below. C _G1 , C _G2 and C _G3 represent the equivalent capacitance between the common voltage electrodes (ie, VCOM1, VCOM2, and VCOM3) and the gate line located below.

根據第四圖與第六圖的操作，每ㄧ共電壓電極相應的等效電容（例如C_S 與C_G ），於所有時間週期（例如t₀ 至t₃ ）都會執行充電或放電。According to the operations of the fourth and sixth figures, the corresponding equivalent capacitance (for example, C _S and C _G ) of each common voltage electrode is charged or discharged for all time periods (for example, t ₀ to t ₃ ).

第八圖例示本發明另一實施例可適用於內嵌式感測裝置之和電路321（第三圖）的時序。第八圖僅顯示時間t₀ 至t₃ 的時序，經重複可得到接續的時序。於圖式中，RX1~RX6表示相應感測信號，“+”表示和電路321對相應感測信號執行加運算，且“0” 表示和電路321對相應感測信號不執行運算。在本實施例的三個期間，和電路321之輸入端的加運算與無（inactive）運算的組合互異。例如，於時間t₀ ，和電路321具“+,+,0”運算組合，於時間t₁ ，和電路321具“+,0,+”運算組合，且於時間t₂ ，和電路321具“0,+,+”運算組合。一般來說，於n連續期間，和電路321之n個輸入端的加運算與無運算的組合互異，其中n為大於二的正整數。The eighth figure illustrates the timing of another embodiment of the present invention applicable to the summing circuit 321 (third diagram) of the in-line sensing device. The eighth graph only shows the timing of the time t ₀ to t ₃ , and the repetition is obtained by repeating the timing. In the drawings, RX1 to RX6 represent respective sensing signals, "+" indicates that sum circuit 321 performs an addition operation on the corresponding sensing signal, and "0" indicates that sum circuit 321 does not perform an operation on the corresponding sensing signal. In the three periods of the present embodiment, the combination of the addition operation and the inactive operation of the input terminal of the circuit 321 is different. For example, at time t ₀ , the sum circuit 321 has a combination of "+, +, 0" operations. At time t ₁ , the sum circuit 321 has a combination of "+, 0, +" operations, and at time t ₂ , the sum circuit 321 has The combination of "0, +, +" operations. In general, during n consecutive periods, the combination of the addition and the no operations of the n inputs of circuit 321 differs, where n is a positive integer greater than two.

假設右側和電路321於第八圖的三個期間內，自接收電路322依序得到和值為a、b與c，其可表示為：或 Assuming that the right side and the circuit 321 are in the three periods of the eighth figure, the sum values a, b, and c are sequentially obtained from the receiving circuit 322, which can be expressed as: or

自接收電路322接收到和值a、b與c之後，即可據以得到感測信號RX1~RX3。After the receiving circuit 322 receives the sum values a, b, and c, the sensing signals RX1 R RX3 can be obtained accordingly.

第九圖顯示根據第八圖操作的感測信號RX1~RX6的時序圖。和電路321的每ㄧ輸入端相應有加運算或無運算。值得注意的是，當相應感測信號不執行運算（亦即，無運算）時，則不會有充電/放電的執行。相較於第六圖，第九圖可節省三分之一的功率消耗。The ninth diagram shows a timing chart of the sensing signals RX1 to RX6 operated in accordance with the eighth figure. Each input of the sum circuit 321 has an addition operation or no operation. It is worth noting that when the corresponding sensing signal does not perform an operation (ie, no operation), there is no execution of charging/discharging. Compared with the sixth figure, the ninth figure can save one-third of the power consumption.

以上所述僅為本發明之較佳實施例而已，並非用以限定本發明之申請專利範圍；凡其它未脫離發明所揭示之精神下所完成之等效改變或修飾，均應包含在下述之申請專利範圍內。The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all other equivalent changes or modifications which are not departing from the spirit of the invention should be included in the following Within the scope of the patent application.

100‧‧‧互電容觸控感測裝置
102‧‧‧自電容觸控感測裝置
200‧‧‧觸控感測裝置
11‧‧‧接收電路
300‧‧‧觸控感測裝置
31‧‧‧觸控面板
32‧‧‧並行式感測電路
321‧‧‧和電路
322‧‧‧接收電路
51‧‧‧放大器
TX1~TX3‧‧‧傳送端
RX1~RX6‧‧‧接收端/感測信號
RX11~RX15‧‧‧接收端
RX21~RX23‧‧‧接收端
SW_RX1‧‧‧第一開關
~SW_RX1‧‧‧第二開關
SW_RX2‧‧‧第一開關
~SW_RX2‧‧‧第二開關
SW_RX3‧‧‧第一開關
~SW_RX3‧‧‧第二開關
C_RX1~C_RX3‧‧‧等效電容
S‧‧‧節點
C‧‧‧電容器
VCOM1、VCOM2、VCOM3‧‧‧共電壓電極
S1、S2、S3‧‧‧源極
G1、G2、G3‧‧‧閘極
C_C1、C_C2‧‧‧等效電容
C_S1、C_S2、C_S3‧‧‧等效電容
C_G1、C_G2、C_G3‧‧‧等效電容100‧‧‧ Mutual Capacitive Touch Sensing Device
102‧‧‧Self-capacitive touch sensing device
200‧‧‧Touch sensing device
11‧‧‧ receiving circuit
300‧‧‧Touch sensing device
31‧‧‧ touch panel
32‧‧‧Parallel sensing circuit
321‧‧‧ and circuit
322‧‧‧ receiving circuit
51‧‧‧Amplifier
TX1~TX3‧‧‧ transmit end
RX1~RX6‧‧‧ Receiver / Sensing Signal
RX11~RX15‧‧‧ Receiver
RX21~RX23‧‧‧ Receiver
SW _RX1 ‧‧‧First switch
~SW _RX1 ‧‧‧Second switch
SW _RX2 ‧‧‧First switch
~SW _RX2 ‧‧‧Second switch
SW _RX3 ‧‧‧First switch
~SW _RX3 ‧‧‧Second switch
C _RX1 ~C _RX3 ‧‧‧ equivalent capacitance
S‧‧‧ node
C‧‧‧ capacitor
VCOM1, VCOM2, VCOM3‧‧‧ common voltage electrode
S1, S2, S3‧‧‧ source
G1, G2, G3‧‧‧ gate
C _C1 , C _C2 ‧‧‧ equivalent capacitance
C _S1 , C _S2 , C _S3 ‧‧‧ equivalent capacitance
C _G1 , C _G2 , C _G3 ‧‧‧ equivalent capacitance

第一A圖顯示互電容觸控感測裝置的示意圖。 第一B圖顯示自電容觸控感測裝置的示意圖。 第二A圖與第二B圖顯示分時觸控感測裝置的示意圖。 第三圖顯示本發明實施例之觸控感測裝置的示意圖。 第四圖例示第三圖之和電路的時序。 第五圖顯示第三圖之和電路的電路圖。 第六圖顯示根據第四圖操作的感測信號的時序圖。 第七圖顯示共電壓電極、源極線與閘極線的等效電容之電路圖。 第八圖例示本發明另一實施例可適用於內嵌式感測裝置之和電路（第三圖）的時序。 第九圖顯示根據第八圖操作的感測信號的時序圖。The first A diagram shows a schematic diagram of a mutual capacitance touch sensing device. The first B diagram shows a schematic diagram of a self-capacitive touch sensing device. 2A and 2B show schematic diagrams of a time-sharing touch sensing device. The third figure shows a schematic diagram of a touch sensing device according to an embodiment of the invention. The fourth figure illustrates the timing of the circuit of the third figure. The fifth figure shows the circuit diagram of the circuit of the third figure. The sixth figure shows a timing chart of the sensing signals operated in accordance with the fourth figure. The seventh figure shows the circuit diagram of the equivalent capacitance of the common voltage electrode, the source line and the gate line. The eighth figure illustrates the timing of another embodiment of the present invention applicable to the summing circuit (third diagram) of the in-line sensing device. The ninth diagram shows a timing chart of the sensing signals operated in accordance with the eighth figure.

300‧‧‧觸控感測裝置 300‧‧‧Touch sensing device

31‧‧‧觸控面板 31‧‧‧ touch panel

32‧‧‧並行式感測電路 32‧‧‧Parallel sensing circuit

321‧‧‧和電路 321‧‧‧ and circuit

322‧‧‧接收電路 322‧‧‧ receiving circuit

RX1~RX6‧‧‧接收端 RX1~RX6‧‧‧ Receiver