TWI450152B - Touch-sensitive display device - Google Patents
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Description
本發明關於一種觸控顯示裝置。The present invention relates to a touch display device.
圖1A為一習知觸控面板的感測線路示意圖，圖1B為圖1A的觸控面板的製作過程流程圖。請同時參考圖1A及圖1B，觸控面板100需同時包含X軸電極串列104及Y軸電極串列106，以定義出二維的觸碰位置，因此需於一透明基板102上依序形成X軸電極串列104、第一絕緣層108、Y軸電極串列106以及第二絕緣層110，而導致較多的製程道數。特別是於目前的內嵌式觸控面板設計中，需面臨整合製程道數的要求，因此若使用前述的感測線路製程製造一內嵌式觸控面板，容易降低產品良率並提高製造成本。1A is a schematic diagram of a sensing circuit of a conventional touch panel, and FIG. 1B is a flow chart of a manufacturing process of the touch panel of FIG. 1A. Referring to FIG. 1A and FIG. 1B simultaneously, the touch panel 100 needs to include the X-axis electrode serial array 104 and the Y-axis electrode serial array 106 at the same time to define a two-dimensional touch position, so that it needs to be sequentially arranged on a transparent substrate 102. The X-axis electrode serial 104, the first insulating layer 108, the Y-axis electrode serial 106, and the second insulating layer 110 are formed, resulting in a larger number of process tracks. Especially in the current in-cell touch panel design, it is required to integrate the number of process channels. Therefore, if an in-cell touch panel is manufactured by using the above-mentioned sensing circuit process, it is easy to reduce the product yield and increase the manufacturing cost. .
本發明提供一種具有簡化製程、高產品良率及低製造成本的觸控顯示裝置。The invention provides a touch display device with a simplified process, high product yield and low manufacturing cost.
本發明的一實施例提供一種觸控顯示裝置，包含複數閘極線、複數資料線以及複數感測信號線。各個閘極線接收至少一第一閘極驅動信號及至少一第二閘極驅動信號，複數資料線與閘極線交錯設置且各個資料線接收一畫素資料信號，且兩相鄰資料線與交錯的兩相鄰閘極線界定一畫素單元的分佈區域。複數感測信號線與複數閘極線保持一間距且疊合閘極線，該些閘極線可區分為多個閘極線群組且每一閘極線群組包含多個閘極線，各個感測信號線接收一感測信號，且每一感測信號線與每一閘極線群組的疊合區域構成一觸控感測單元。觸控顯示裝置的每個顯示畫面的圖框時間具有畫面寫入區間及非畫面寫入區間，於畫面寫入區間第一閘極驅動信號驅動各個閘極線以將畫素資料信號寫入畫素單元，且於非畫面寫入區間第二閘極驅動信號逐一驅動各個閘極線群組以使各個觸控感測單元感測因觸碰動作感應生成的耦合電容。An embodiment of the invention provides a touch display device including a plurality of gate lines, a plurality of data lines, and a plurality of sensing signal lines. Each of the gate lines receives at least one first gate driving signal and at least one second gate driving signal, the plurality of data lines are alternately arranged with the gate lines, and each data line receives a pixel data signal, and two adjacent data lines and The staggered two adjacent gate lines define a distribution area of a pixel unit. The plurality of sensing signal lines are spaced apart from the plurality of gate lines and overlap the gate lines. The gate lines can be divided into a plurality of gate line groups and each gate line group includes a plurality of gate lines. Each of the sensing signal lines receives a sensing signal, and each of the sensing signal lines and the overlapping area of each of the gate line groups constitutes a touch sensing unit. The frame time of each display screen of the touch display device has a picture writing interval and a non-picture writing interval. In the picture writing interval, the first gate driving signal drives each gate line to write the pixel data signal into the picture. And the second gate driving signal drives the respective gate line groups one by one in the non-picture writing interval to cause the respective touch sensing units to sense the coupling capacitance generated by the touch action.
於一實施例中，於該畫面寫入區間同一時間僅一道閘極線被第一閘極驅動信號驅動。In one embodiment, only one gate line is driven by the first gate drive signal at the same time during the picture write interval.
於一實施例中，感測信號線實質上平行資料線且垂直閘極線。In one embodiment, the sense signal lines are substantially parallel to the data lines and to the vertical gate lines.
於一實施例中，第二閘極驅動信號驅動一閘極線的時間點早於第一閘極驅動信號驅動同一閘極線的時間點。In one embodiment, the timing at which the second gate drive signal drives a gate line is earlier than the time at which the first gate drive signal drives the same gate line.
於一實施例中，該第二閘極驅動信號為正壓信號或負壓信號。In an embodiment, the second gate driving signal is a positive voltage signal or a negative voltage signal.
於一實施例中，於該非畫面寫入區間第一閘極驅動信號為低準位。In an embodiment, the first gate driving signal is at a low level in the non-picture writing interval.
於一實施例中，複數閘極線構成一觸控感測結構的一X軸電極串列，且複數感測信號線構成觸控感測結構的一Y軸電極串列。In one embodiment, the plurality of gate lines form an X-axis electrode train of a touch sensing structure, and the plurality of sensing signal lines form a Y-axis electrode train of the touch sensing structure.
本發明另一實施例提供一種觸控顯示裝置，包含複數閘極線、複數資料線以及複數感測信號線。各個閘極線接收至少一顯示掃描信號及至少一耦合信號，耦合信號於顯示掃描信號為低準位時致能，且耦合信號驅動各個閘極線的時間點早於顯示掃描信號驅動同一閘極線的時間點。複數資料線與閘極線交錯設置且各個資料線接收一畫素資料信號，其中兩相鄰資料線與交錯的兩相鄰閘極線界定一畫素單元的分佈區域。複數感測信號線與複數閘極線保持一間距且疊合該些閘極線，該些閘極線區分為多個閘極線群組且每一閘極線群組包含多個閘極線，各個感測信號線接收一感測信號，且每一感測信號線與每一閘極線群組的疊合區域構成一觸控感測單元。顯示掃描信號逐道驅動各個閘極線以將畫素資料信號寫入畫素單元，耦合信號以每次驅動一閘極線群組的方式驅動各個閘極線以使各個觸控感測單元感測因觸碰動作感應生成的耦合電容。Another embodiment of the present invention provides a touch display device including a plurality of gate lines, a plurality of data lines, and a plurality of sensing signal lines. Each of the gate lines receives at least one display scan signal and at least one coupled signal. The coupled signal is enabled when the display scan signal is at a low level, and the time at which the coupled signal drives each gate line drives the same gate earlier than the display scan signal The point in time of the line. The plurality of data lines are alternately arranged with the gate lines and each of the data lines receives a pixel data signal, wherein the two adjacent data lines and the two adjacent adjacent gate lines define a distribution area of the pixel unit. The plurality of sensing signal lines are spaced apart from the plurality of gate lines and overlap the gate lines, the gate lines are divided into a plurality of gate line groups and each gate line group includes a plurality of gate lines Each of the sensing signal lines receives a sensing signal, and each of the sensing signal lines and the overlapping area of each of the gate line groups constitutes a touch sensing unit. The display scan signal drives each gate line one by one to write the pixel data signal into the pixel unit, and the coupling signal drives each gate line each time driving a gate group to make the respective touch sensing units feel Measure the coupling capacitance generated by the touch action.
藉由上述各個實施例的設計，因群組化的複數閘極線可作為一個軸向上的電極串列，如此僅需形成另一個軸向的電極串列(複數感測信號線)即可構成一觸控感測結構，大幅簡化線路佈局並減少製程數，故可提高產品良率並減少製造時間及成本，且易於將觸控功能整合於一內嵌式觸碰面板。According to the design of each of the above embodiments, the grouped complex gate lines can be used as an axial series of electrodes, so that only another axial electrode series (complex sensing signal lines) can be formed. A touch sensing structure greatly simplifies the layout of the circuit and reduces the number of processes, thereby improving product yield, reducing manufacturing time and cost, and easily integrating touch functions into an in-cell touch panel.
本發明的其他目的和優點可以從本發明所揭露的技術特徵中得到進一步的了解。為讓本發明之上述和其他目的、特徵和優點能更明顯易懂，下文特舉實施例並配合所附圖式，作詳細說明如下。Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. The above and other objects, features, and advantages of the invention will be apparent from
有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之實施例的詳細說明中，將可清楚的呈現。以下實施例中所提到的方向用語，例如：上、下、左、右、前或後等，僅是參考附加圖式的方向。因此，使用的方向用語是用來說明並非用來限制本發明。The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the embodiments of the invention. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.
圖2為依本發明一實施例的觸控顯示裝置示意圖。如圖2所示，觸控顯示裝置10包含複數閘極線12、複數資料線14以及複數感測信號線16。複數資料線14與複數閘極線12交錯設置，兩相鄰資料線14與交錯的兩相鄰閘極線12界定一畫素單元20的分佈區域，且各個畫素單元20具有至少一薄膜電晶體18。複數感測信號線16疊合複數閘極線12，且感測信號線16與閘極線12保持一間距。於一實施例中，各個感測信號線16可實質上平行資料線14且垂直閘極線12。2 is a schematic diagram of a touch display device according to an embodiment of the invention. As shown in FIG. 2 , the touch display device 10 includes a plurality of gate lines 12 , a plurality of data lines 14 , and a plurality of sensing signal lines 16 . The plurality of data lines 14 and the plurality of gate lines 12 are alternately arranged. The two adjacent data lines 14 and the two adjacent gate lines 12 are defined to define a distribution area of the pixel unit 20, and each of the pixel units 20 has at least one thin film. Crystal 18. The plurality of sensing signal lines 16 overlap the plurality of gate lines 12, and the sensing signal lines 16 are spaced apart from the gate lines 12. In an embodiment, each of the sensing signal lines 16 may be substantially parallel to the data line 14 and the vertical gate line 12.
觸控顯示裝置10可進行顯示及觸控感測操作，於進行顯示操作時，各個閘極線12接收一第一閘極驅動信號g1，第一閘極驅動信號g1逐道驅動閘極線12，且被第一閘極驅動信號g1驅動的該道閘極線12可開啟對應的薄膜電晶體18，使與閘極線12交錯的資料線14讀入畫素資料信號D，並透過薄膜電晶體18將畫素資料信號D傳送至液晶電容。於進行觸控感測操作時，各個閘極線12接收一第二閘極驅動信號g2且各個感測信號線16接收一感測信號S。請同時參考圖2及圖3，於本實施例中，複數閘極線12可區分為多個閘極線群組GP，每一個閘極線群組GP包含多個閘極線12，且每一感測信號線16與每一閘極線群組GP的多個疊合區域24構成一觸控感測單元N。進行觸控感測操作的耦合信號(例如第二閘極驅動信號g2)係以每次驅動一個閘極線群組GP的方式驅動閘極線12。以圖3為例，每一閘極線群組包含3道閘極線12，亦即同一時間有3道閘極線12同時被第二閘極驅動信號g2之耦合信號驅動且每一觸控感測單元N包含3個疊合區域24。藉由多個閘極線12同時接收第二閘極驅動信號g2可提供較充分的耦合電容以增加觸控感測能力。當然，上述每一閘極線群組包含3道閘極線僅為例示，每一閘極線群組的閘極線數量完全不限定而可視實際需求變化。第二閘極驅動信號g2逐一驅動各個閘極線群組GP，以將各個觸控感測單元N因觸碰動作感應生成的耦合電容所導致的電壓變化，傳送到例如IC晶片的信號處理單元(未圖示)，以偵測出觸碰位置。The touch display device 10 can perform display and touch sensing operations. When performing the display operation, each gate line 12 receives a first gate driving signal g1, and the first gate driving signal g1 drives the gate line 12 lane by way. The gate line 12 driven by the first gate driving signal g1 can turn on the corresponding thin film transistor 18, and the data line 14 interleaved with the gate line 12 is read into the pixel data signal D, and transmitted through the thin film. The crystal 18 transmits the pixel data signal D to the liquid crystal capacitor. During the touch sensing operation, each gate line 12 receives a second gate driving signal g2 and each sensing signal line 16 receives a sensing signal S. Referring to FIG. 2 and FIG. 3 simultaneously, in the embodiment, the plurality of gate lines 12 can be divided into a plurality of gate line groups GP, and each of the gate line groups GP includes a plurality of gate lines 12, and each A sensing signal line 16 and a plurality of overlapping regions 24 of each gate group GP form a touch sensing unit N. The coupling signal for performing the touch sensing operation (for example, the second gate driving signal g2) drives the gate line 12 in such a manner that one gate group GP is driven each time. For example, in FIG. 3, each gate group includes three gate lines 12, that is, three gate lines 12 are simultaneously driven by the coupling signal of the second gate driving signal g2 at the same time and each touch The sensing unit N includes three overlapping regions 24. By simultaneously receiving the second gate driving signal g2 by the plurality of gate lines 12, a sufficient coupling capacitance can be provided to increase the touch sensing capability. Of course, each of the above gate group includes three gate lines for illustration only, and the number of gate lines of each gate group is completely undefined and can be changed according to actual needs. The second gate driving signal g2 drives the respective gate line groups GP one by one to transmit the voltage changes caused by the coupling capacitances generated by the touch sensing units N by the touch action to a signal processing unit such as an IC chip. (not shown) to detect the touch position.
請再參考圖3，觸控顯示裝置10的每一個顯示畫面的圖框時間具有一畫面寫入區間及非畫面寫入區間(blanking time)，於畫面寫入區間第一閘極驅動信號g1逐道驅動閘極線G1-Gn以將畫素資料信號D寫入各個畫素單元20。於非畫面寫入區間，第二閘極驅動信號g2依序一次驅動一個閘極線群組GP，且各個感測信號線16接收感測信號S，以使各個觸控感測單元N感測因觸碰動作感應生成的耦合電容所導致的電壓變化。換言之，第二閘極驅動信號g2可於第一閘極驅動信號g1為低準位(VGL)時致能以進行觸控感測操作，且於本實施例中，第二閘極驅動信號g2驅動一閘極線12的時間點早於第一閘極驅動信號g1驅動同一閘極線的時間點，亦即可於進行觸控感測操作的電容耦合後再將畫素資料信號D寫入畫素單元20，如此可確保第二閘極驅動信號g2不會影響顯示畫面。Referring to FIG. 3 again, the frame time of each display screen of the touch display device 10 has a screen writing interval and a non-screen writing time, and the first gate driving signal g1 is in the screen writing interval. The gate drives the gate lines G1-Gn to write the pixel data signal D to the respective pixel units 20. In the non-picture writing interval, the second gate driving signal g2 drives one gate group GP in sequence, and each sensing signal line 16 receives the sensing signal S, so that each touch sensing unit N senses The voltage change caused by the coupling capacitance generated by the touch action. In other words, the second gate driving signal g2 can be enabled to perform a touch sensing operation when the first gate driving signal g1 is at a low level (VGL), and in the embodiment, the second gate driving signal g2 The time at which the gate line 12 is driven is earlier than the time when the first gate driving signal g1 drives the same gate line, and the pixel data signal D can be written after the capacitive coupling of the touch sensing operation. The pixel unit 20 ensures that the second gate drive signal g2 does not affect the display screen.
於上述實施例中，觸控感測操作的耦合信號並不限定為由掃描驅動電路提供的一閘極驅動信號，亦可為其他信號源提供的掃描信號，且耦合信號例如可為一負壓信號(圖4A)或正壓信號(圖4B)均可。另外，耦合信號的電壓準位可設定在漏電流(Ioff )較低的區域，以避免於觸控感測操作階段薄膜電晶體18有較低的漏電流。另外，各個感測信號線16的圖案外形並不限定為圖2所示的條狀電極，例如亦可為多個沿同一軸向(例如Y軸方向)排列的三角形或菱形透明電極所構成。In the above embodiment, the coupling signal of the touch sensing operation is not limited to a gate driving signal provided by the scan driving circuit, and may also be a scanning signal provided by other signal sources, and the coupling signal may be, for example, a negative voltage. Both the signal (Fig. 4A) or the positive pressure signal (Fig. 4B) can be used. In addition, the voltage level of the coupled signal can be set in a region where the leakage current (I off ) is low to avoid a low leakage current of the thin film transistor 18 during the touch sensing operation phase. Further, the pattern shape of each of the sensing signal lines 16 is not limited to the strip electrodes shown in FIG. 2, and may be, for example, a plurality of triangular or rhombic transparent electrodes arranged in the same axial direction (for example, the Y-axis direction).
請同時參考圖5A及圖5B，藉由上述各個實施例的設計，因群組化的複數閘極線12可作為一個軸向上(例如X軸向)的電極串列，如此透明基板32上僅需形成另一個軸向(例如Y軸向)的電極串列(複數感測信號線16)即可構成一觸控感測結構，大幅簡化線路佈局並減少製程數，故可提高產品良率與減少製造時間及成本，且易於將觸控功能整合於一內嵌式觸碰面板。Referring to FIG. 5A and FIG. 5B simultaneously, by the design of each of the above embodiments, the grouped complex gate lines 12 can be used as an axial (eg, X-axis) electrode string, such that only the transparent substrate 32 is Another axial (for example, Y-axis) electrode string (complex sense signal line 16) needs to be formed to form a touch sensing structure, which greatly simplifies the circuit layout and reduces the number of processes, thereby improving product yield and Reduce manufacturing time and cost, and easily integrate touch functions into an in-line touch panel.
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。另外本發明的任一實施例或申請專利範圍不須達成本發明所揭露之全部目的或優點或特點。此外，摘要部分和標題僅是用來輔助專利文件搜尋之用，並非用來限制本發明之權利範圍。The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.
10．．．觸控顯示裝置10. . . Touch display device
12、G1-Gn．．．閘極線12, G1-Gn. . . Gate line
14．．．資料線14. . . Data line
16．．．感測信號線16. . . Sense signal line
18．．．薄膜電晶體18. . . Thin film transistor
20．．．畫素單元20. . . Pixel unit
24．．．疊合區域twenty four. . . Overlapping area
32．．．透明基板32. . . Transparent substrate
100．．．觸控面板100. . . Touch panel
102．．．透明基板102. . . Transparent substrate
104．．．X軸電極串列104. . . X-axis electrode series
VGL．．．低準位VGL. . . Low level
106．．．Y軸電極串列106. . . Y-axis electrode series
108．．．第一絕緣層108. . . First insulating layer
110．．．第二絕緣層110. . . Second insulating layer
D．．．畫素資料信號D. . . Pixel information signal
g1．．．第一閘極驅動信號G1. . . First gate drive signal
g2．．．第二閘極驅動信號G2. . . Second gate drive signal
GP．．．閘極線群組GP. . . Gate line group
N．．．觸控感測單元N. . . Touch sensing unit
S．．．感測信號S. . . Sense signal
VGH．．．高準位VGH. . . High level
圖1A為一習知觸控面板的感測線路示意圖，圖1B為圖1A的觸控面板的製作過程流程圖。1A is a schematic diagram of a sensing circuit of a conventional touch panel, and FIG. 1B is a flow chart of a manufacturing process of the touch panel of FIG. 1A.
圖2為本發明一實施例的觸控顯示裝置示意圖。FIG. 2 is a schematic diagram of a touch display device according to an embodiment of the invention.
圖3為本發明一實施例的顯示及觸控感測操作驅動信號時序圖。FIG. 3 is a timing diagram of driving signals for display and touch sensing operations according to an embodiment of the invention.
圖4A及圖4B為依本發明不同實施例的耦合信號波形圖。4A and 4B are waveform diagrams of coupled signals in accordance with various embodiments of the present invention.
圖5A為本發明一實施例的觸控顯示裝置的感測線路示意圖，圖5B為圖5A的感測線路製作過程流程圖。FIG. 5A is a schematic diagram of a sensing circuit of a touch display device according to an embodiment of the present invention, and FIG. 5B is a flow chart of a process for manufacturing a sensing circuit of FIG. 5A.
10．．．觸控顯示裝置10. . . Touch display device
12．．．閘極線12. . . Gate line
14．．．資料線14. . . Data line
16．．．感測信號線16. . . Sense signal line
18．．．薄膜電晶體18. . . Thin film transistor
20．．．畫素單元20. . . Pixel unit
24．．．疊合區域twenty four. . . Overlapping area
D．．．畫素資料信號D. . . Pixel information signal
g1．．．第一閘極驅動信號G1. . . First gate drive signal
g2．．．第二閘極驅動信號G2. . . Second gate drive signal
N．．．觸控感測單元N. . . Touch sensing unit
S．．．感測信號S. . . Sense signal
Claims (11)
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| TW101102978A TWI450152B (en) | 2011-02-11 | 2012-01-31 | Touch-sensitive display device |
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| TW100104644 | 2011-02-11 | ||
| TW101102978A TWI450152B (en) | 2011-02-11 | 2012-01-31 | Touch-sensitive display device |
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| TWI450152B true TWI450152B (en) | 2014-08-21 |
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| KR101480315B1 (en) * | 2012-08-16 | 2015-01-08 | 엘지디스플레이 주식회사 | Display device with integrated touch screen and method for driving the same |
| CN103677378B (en) * | 2012-09-26 | 2016-12-28 | 群康科技(深圳)有限公司 | In-cell touch panel display and there is the electronic installation of In-cell touch panel display |
| TWI487989B (en) * | 2012-10-05 | 2015-06-11 | Orise Technology Co Ltd | Multi-touch system for controlling display capacitors of lcd to reduce influence of touch sensing and its method |
| CN103728798B (en) * | 2012-10-16 | 2016-05-04 | 旭曜科技股份有限公司 | Control liquid crystal capacitance to reduce touch-control system and the method thereof on touch-control sensing impact |
| CN105223750A (en) * | 2015-10-16 | 2016-01-06 | 深超光电（深圳）有限公司 | Array base palte and touch control display apparatus |
| TWI588705B (en) * | 2016-04-08 | 2017-06-21 | 友達光電股份有限公司 | Touch display panel and sensing method for touch force |
| CN106526939A (en) * | 2016-12-30 | 2017-03-22 | 武汉华星光电技术有限公司 | Embedded touch control liquid crystal display panel and manufacturing method thereof |
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| CN102637092A (en) | 2012-08-15 |
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