WO2015192597A1 - 触摸面板及其驱动方法、显示装置 - Google Patents
触摸面板及其驱动方法、显示装置 Download PDFInfo
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- WO2015192597A1 WO2015192597A1 PCT/CN2014/091731 CN2014091731W WO2015192597A1 WO 2015192597 A1 WO2015192597 A1 WO 2015192597A1 CN 2014091731 W CN2014091731 W CN 2014091731W WO 2015192597 A1 WO2015192597 A1 WO 2015192597A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
Definitions
- the present invention relates to the field of touch screens, and in particular to a touch panel and a driving method thereof and a display device including the same.
- touch screens provide users with better convenience as an input medium.
- the touch screen can be divided into a resistive touch screen, a capacitive touch screen, a surface acoustic wave touch screen, an infrared touch screen and the like. Resistive and capacitive touch screen technologies are widely used today.
- FIG. 1 is a schematic diagram of a common mutual capacitive touch screen.
- the mutual capacitive touch screen includes a plurality of driving lines extending in the y-axis direction (electrically connected to the driving signal source 101 ) and A detection line extending along the x-axis direction (electrically connected to the detection circuit 106).
- the basic principle of the mutual capacitance type touch screen shown in FIG. 1 is that a voltage is applied to the side of the driving line, and a signal change is detected on the side of the detecting signal line.
- the drive line determines the x-direction coordinates and the probe line determines the y-direction coordinates.
- the x-direction drive line is scanned line by line, and when scanning each line of the drive line, the signals on each detection line are read, and by one round of scanning, the intersection of each line and column can be scanned to A total of x*y signals are scanned.
- This detection method can specifically determine the coordinates of multiple points, so multi-touch can be realized.
- FIG. 2 Shown in Figure 2 is an equivalent circuit diagram of the mutual capacitive touch screen shown in Figure 1.
- the driving signal source 101 provides an electric signal for the driving line.
- the driving line resistance 103 exists on the driving line, and the mutual capacitance 102 is formed between the driving line and the detecting line.
- the parasitic capacitance 104 is formed between the driving line, the detecting line and the common electrode layer, and the detecting line is formed.
- the detection line is connected to the detection circuit 106.
- the driving line and the detecting line respectively extend in the y direction and the x direction, so that the driving line and the detecting line need to be respectively taken out from both sides of the display device, so that the touch panel occupies an additional space on both sides of the display device, thereby It is not conducive to achieving a narrow frame of the display device.
- An object of the present invention is to provide a touch panel and a driving method thereof, and a display device including the same.
- a display device including the touch panel has a narrow bezel.
- a touch panel includes a touch control unit, a plurality of driving electrodes, and a plurality of sensing electrodes, and the plurality of the driving electrodes and the plurality of sensing electrodes are provided. Electrically connected to the touch control unit, the touch control unit provides a driving signal to each of the driving electrodes, wherein the driving electrode is disposed to be insulated from the sensing electrode, and the plurality of the driving electrodes and the plurality of The sensing electrodes extend in the same direction, and the resistances are different at different positions on the driving electrodes in a direction extending along the driving electrodes, and the sensing electrodes are capable of outputting an inductive signal to the touch control unit.
- the touch panel further includes a driving signal trace, and the plurality of driving electrodes are electrically connected to the driving signal output end of the touch control unit through the same driving signal trace.
- the drive electrode and the sensing electrode are both made of a transparent electrode material.
- the drive electrode and the sensing electrode are disposed in different layers.
- the drive electrode has a width of between 3 mm and 7 mm.
- the touch panel further includes a signal amplifying unit connected between the sensing electrode and the touch control unit to amplify the sensing signal output by the sensing electrode.
- a display device including the above touch panel provided by the present invention.
- the present invention also provides a driving method of a touch panel, wherein a plurality of driving electrodes and a plurality of sensing electrodes extend in the same direction, and a plurality of driving electrodes and a plurality of sensing electrodes extend in the same direction, and the driving method includes: passing along A signal generated by the resistance of the different positions of the driving electrodes in the extending direction of the driving electrode determines a coordinate of the touched point, and the signal output by the sensing electrode determines another coordinate of the touched point.
- the lead wires of the driving electrode and the sensing electrode are all located on the same side, thereby facilitating realization of a narrow bezel display of the display device including the touch panel.
- the touch panel provided by the present invention can be embedded in the display panel to reduce the overall thickness of the display device.
- FIG. 1 is a schematic diagram of a mutual capacitance type touch screen in the prior art
- FIG. 2 is an equivalent circuit diagram of the mutual capacitance type touch screen shown in FIG. 1;
- FIG. 3 is a schematic view of a touch panel provided by the present invention.
- FIG. 4 is an equivalent circuit diagram of the touch panel shown in FIG. 3;
- FIG. 5 is a simulation diagram of signal intensity before and after the touch in the touch panel shown in FIG. 3 at the near driving end of the driving electrode, the middle of the driving electrode, and the far driving end of the driving electrode.
- a touch panel which includes a touch control unit 10, a plurality of driving electrodes 20, and a plurality of sensing electrodes 30,
- the plurality of driving electrodes 20 and the plurality of sensing electrodes 30 are electrically connected to the touch control unit 10, and the touch control unit 10 supplies driving signals to the plurality of driving electrodes 20, wherein the driving electrodes 20 are disposed to be insulated from the sensing electrodes 30 to A capacitance is formed between the adjacent driving electrode 20 and the sensing electrode 30, and the plurality of driving electrodes 20 and the plurality of sensing electrodes 30 extend in the same direction, at different positions on the driving electrode 20 in a direction extending along the driving electrode 20.
- the sensing electrode 30 can output an inductive signal to the touch control unit 10, unlike the resistance.
- the touch control unit 10 supplies a driving signal to the driving electrode 20 and receives the sensing signal output from the sensing electrode 30. As shown in FIG. 4, a capacitance is formed between the drive electrode 20 and the sense electrode 30 adjacent to the drive electrode 20.
- the driving electrode 20 and the sensing electrode 30 have internal resistance, that is, the driving electrode 20 and the sensing electrode 30 are formed by connecting a plurality of resistors in series, the driving electrode 20 and the sensing electrode 30 adjacent to the driving electrode 20
- the capacitance formed at the near driving end is different from the driving electrode 20 and the sensing electrode 30 adjacent to the driving electrode 20 at the far driving end (ie, the end away from the touch control unit 10)
- the difference in induced signal strength before and after the touch at the near driving end of the driving electrode, the near middle portion of the driving electrode, and the far driving end of the driving electrode is shown in FIG. Among them, the vertical axis represents current and the horizontal axis represents time. As can be seen from the figure, the current at the near driving end of the driving electrode, the current in the middle of the driving electrode, and the current in the far driving end of the driving electrode are different from each other. Therefore, the capacitances formed on the drive electrodes in the longitudinal direction and the sensing electrodes are also different from each other.
- the finger When the operator's finger touches the display device including the touch panel, the finger causes the capacitance between the driving electrode 20 and the sensing electrode 30 at the touch to change, and therefore, the sensing signal on the sensing electrode 30 changes, which is easy. It is understood that when the touch points are located at different lengths of the drive electrodes 20, the amount of change in the induced signals is different.
- the touch control unit can calculate the coordinates of the touched point based on the sensed change signal. According to the difference of the sensing signals, the coordinates of the touch point in the y-axis direction can be determined, and the position of the touch point in the x-axis direction can be determined according to the position of the sensing electrode 30 that generates the sensing signal. Standard.
- both the driving electrode 20 and the sensing electrode 30 extend in the same direction (in the embodiment shown in FIG. 3, both the driving electrode 20 and the sensing electrode 30 extend in the y-axis direction), the driving electrode 20 and the sensing electrode 30 are led out.
- the lines are all located on the same side of the touch panel (in the embodiment shown in FIG. 3, the lead lines of the driving electrode 20 and the sensing electrode 30 are both located at the lower portion of the touch panel), thereby facilitating realization of the display device including the touch panel
- the narrow border is displayed.
- the touch control unit 10 has a function of providing a driving signal for the driving electrode 20 and a sensing signal for receiving the output of the sensing electrode 30, which is equivalent to integrating the driving signal source 101 and the detecting circuit 106 in the background art. Thereby, the volume of the touch panel is further reduced, which is advantageous for realizing a narrow bezel display of the display device including the touch panel.
- the touch panel provided by the present invention can be embedded in the display panel to reduce the overall thickness of the display device.
- a plurality of driving electrodes 20 may be disposed on the array substrate, and the plurality of sensing electrodes 30 may be disposed on the pair of substrate substrates disposed opposite to the array substrate.
- the driving electrode 20 and the sensing electrode 30 are respectively disposed in different layers of the array substrate or in different layers of the color filter substrate.
- the material from which the drive electrode 20 and the induction electrode 30 are formed is not particularly limited.
- the drive electrode 20 and the sense electrode 30 may be made of a conductive metal material.
- the driving electrode 20 and the sensing electrode 30 can be made of a material having a relatively large resistance, so that the difference between the driving signal of the driving electrode 20 at the near driving end and the signal of the driving electrode 20 at the far driving end can be increased, thereby being more accurate. Determine the coordinates of the touch point.
- the drive electrode 20 and the sense electrode 30 may be made of a transparent electrode material (for example, ITO).
- the transparent electrode material has a large electrical resistance. Therefore, the use of the transparent electrode material to form the driving electrode 20 and the sensing electrode 30 can increase the resistance value of the driving electrode 20 at the near driving end and the driving electrode 20 at the far drive. The difference between the resistance values of the terminals, and the difference in intensity between the sensing signal of the near driving end and the sensing signal of the far driving end can be increased, so that the coordinates of the touched point can be more accurately determined. Further, the formation of the driving electrode 20 and the sensing electrode 30 by using the transparent electrode material does not lower the aperture ratio of the display device.
- the touch panel may further include a driving signal trace 40 electrically connected to an output end of the touch control unit 10, and the plurality of driving electrodes 20 pass The same drive signal trace 40 is electrically coupled to the output of the touch control unit 10.
- different sensing electrodes 30 are connected to the touch control unit at different interfaces, so that it can be determined which sensing electrode 30 the touch point is located on.
- the drive electrode 20 and the sense electrode 30 adjacent to the drive electrode 20 are spaced apart from each other. Therefore, as a preferred embodiment of the present invention, the drive electrode 20 and the sense electrode 30 can be disposed in different layers.
- the number of the sensing electrodes 30 can be exactly the same as the number of the driving electrodes 20, that is, the driving electrodes 20 are in one-to-one correspondence with the sensing electrodes 30. This arrangement can increase the sensitivity of the touch.
- the driving electrodes 20 are alternately arranged with the sensing electrodes 30 (as shown in FIG. 3), such that the cost of the touch panel can be reduced and the manufacturing process of the touch panel can be simplified.
- the user can specifically set the number of the sensing electrodes 30 and the driving electrodes 20 according to specific requirements.
- the sensing electrode 30 and the driving electrode 20 may be disposed in one-to-one correspondence; in a case where the touch sensitivity is relatively low and a low cost is required, the driving electrode 20 may be caused. It is spaced apart from the sensing electrode 30.
- the width of the drive electrode 20 is between 3 mm and 7 mm, so that the difference in drive signal strength between the near drive end and the far drive end of the drive electrode 20 can be increased.
- a signal amplifying unit between the sensing electrode 30 and the touch control unit 10.
- an induced current is generated on the sensing electrode 30, and after being amplified by the signal amplifying unit, the touch unit is convenient to determine the coordinates of the touched point.
- a display device including a touch panel and a display panel, wherein the touch panel is the above-described touch panel provided by the present invention.
- the display panel may be a liquid crystal display panel or an OLED display panel.
- the display panel may include an array substrate and a pair of cassette substrates disposed with the array substrate.
- the touch panel provided by the present invention is used When the touch panel is an on-cell, the upper substrate and the lower substrate may be further included, and the driving electrodes may be disposed on the lower substrate, and the sensing electrodes are disposed on the upper substrate.
- the touch panel can be directly disposed on the light-emitting surface of the corresponding display panel.
- the touch panel of the present invention can also be used as an in-cell touch panel.
- the touch panel and the display panel are not two separate entities, but are integrated into one.
- a plurality of driving electrodes of the touch panel are disposed on the array substrate or the pair of cassette substrates, and a plurality of sensing electrodes of the touch panel are disposed on the array substrate or the pair of cassette substrates on.
- a plurality of the driving electrodes may be disposed on the array substrate, and a plurality of the sensing electrodes may be disposed on the counter substrate disposed opposite to the array substrate. Or the driving electrodes and the sensing electrodes are respectively disposed in different layers of the array substrate, or the driving electrodes and the sensing electrodes are respectively disposed in different layers of the counter substrate.
- the plurality of driving electrodes may be disposed on one of the array substrate and the pair of cassette substrates, and the plurality of sensing electrodes are disposed on the array substrate and The other of the pair of cassette substrates.
- a color film layer and a black matrix can be disposed on the pair of cassette substrates, so that the pair of cassette substrates are formed as a color filter substrate, so that the display device can realize color display.
- the drive signal trace and the touch control unit may each be disposed in a routing area of the display device.
- the routing area can be located on one side of the display device such that a narrow bezel can be achieved.
- the display device may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like. .
- the embodiment of the present invention further provides a driving method of a touch panel.
- the plurality of driving electrodes and the plurality of sensing electrodes extend in the same direction, and the plurality of driving electrodes and the plurality of sensing electrodes extend in the same direction.
- the driving method includes: Determining a coordinate of the touched point (for example, a coordinate of the touched point along the x-axis) by a signal generated by a resistance of a different position of the driving electrode along an extending direction of the driving electrode, and determining a touched point by a signal output by the sensing electrode Another coordinate (for example, the coordinates of the touch point along the y axis).
- the touch control unit in the embodiment of the present invention integrates the function of driving the signal source to the driving electrode to emit the driving signal and the function of the detecting circuit detecting the sensing electrode output sensing signal.
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Abstract
一种触摸面板，包括触摸控制单元（10）、多个驱动电极（20）和多个感应电极（30），多个驱动电极（20）和多个感应电极（30）均与触摸控制单元（10）电连接，触摸控制单元（10）向每个驱动电极（20）提供驱动信号，触摸控制单元（10）还能够向每个感应电极（30）提供感应信号，所述驱动电极（20）和所述感应电极（30）之间绝缘设置，多个驱动电极（20）和多个感应电极（30）沿相同的方向延伸，在沿驱动电极（20）延伸的方向上，驱动电极（20）上不同位置处电阻不同，感应电极（30）能够向触摸控制单元（10）输出感应信号。还提供一种包括触摸面板的显示装置。由于驱动电极（20）和感应电极（30）均沿同一方向延伸，驱动电极（20）和感应电极（30）的引出线均位于同一边，从而有利于实现包括触摸面板的显示装置的窄边框显示。
Description
本发明涉及触摸屏领域，具体地，涉及一种触摸面板及其驱动方法和一种包括该触摸面板的显示装置。
相比于键盘和鼠标，触摸屏作为一种输入媒介为使用者提供了更好的便利性。根据不同的工作原理，触摸屏可以分为电阻式触摸屏、电容式触摸屏、表面声波式触摸屏、红外式触摸屏等等。目前广泛使用的是电阻式和电容式触摸屏技术。
凭借较高的灵敏度以及多点触控的优点，互电容式触摸屏受到越来越多的追捧。图1中所示的是一种常见的互电容式触摸屏的示意图，如图1所示，互电容式触摸屏包括多条沿y轴方向延伸的驱动线(与驱动信号源101电连接)和多条沿x轴方向延伸的探测线(与检测电路106电连接)。
图1中所示的互电容式触摸屏的基本原理为：在驱动线侧加电压，在探测信号线侧检测信号变化。驱动线确定x向坐标，探测线确定y向坐标。在检测时，对x向驱动线进行逐行扫描，在扫描每一行驱动线时，均读取每条探测线上的信号，通过一轮的扫描，就可以把每个行列的交点都扫描到，共扫描x*y个信号。这种检测方式可以具体的确定多点的坐标，因此可以实现多点触摸。
图2中所示的是图1中所示的互电容式触摸屏的等效电路图。驱动信号源101为驱动线提供电信号，驱动线上存在驱动线电阻103，驱动线与探测线之间形成互电容102，驱动线、探测线与公共电极层间形成有寄生电容104，探测线上存在探测线电阻105。探测线与检测电路106相连。当操作者的手指触摸所述互电容式触摸屏时，一部分电流流入手指，并通过手指流向地面，该过程等效为驱动线及感应
线之间的互电容改变，在检测端检测由此导致的微弱电流变化，可以确定触摸点的坐标。
如图1中所示，驱动线和探测线分别沿y方向和x方向延伸，因此驱动线和探测线需要分别从显示装置的两侧引出，导致触摸面板占用额外的显示装置两侧空间，从而不利于实现显示装置的窄边框化。
因此，如何利用互电容式触摸屏实现窄边框化的显示装置成为本领域亟待解决的技术问题。
发明内容
本发明的目的在于提供一种触摸面板及其驱动方法、一种包括该触摸面板的显示装置。包括所述触摸面板的显示装置具有较窄的边框。
为了实现上述目的，作为本发明的一个方面，提供一种触摸面板，该触摸面板包括触摸控制单元、多个驱动电极和多个感应电极，多个所述驱动电极和多个所述感应电极均与所述触摸控制单元电连接，所述触摸控制单元向每个所述驱动电极提供驱动信号，其中，所述驱动电极设置为与所述感应电极绝缘，且多个所述驱动电极和多个所述感应电极沿相同的方向延伸，在沿所述驱动电极延伸的方向上，所述驱动电极上不同位置处电阻不同，所述感应电极能够向所述触摸控制单元输出感应信号。
可选地，所述触摸面板还包括驱动信号走线，多个所述驱动电极通过同一条所述驱动信号走线电连接至所述触摸控制单元的驱动信号输出端。
可选地，所述驱动电极和所述感应电极均由透明电极材料制成。
可选地，所述驱动电极和所述感应电极设置在不同层。
可选地，所述驱动电极的宽度在3mm至7mm之间。
可选地，所述触摸面板还包括信号放大单元，该信号放大单元连接在所述感应电极和所述触摸控制单元之间，以放大所述感应电极输出的感应信号。
作为本发明的另一个方面，提供一种显示装置，该显示装置包括本发明所提供的上述触摸面板。
本发明还提供一种触摸面板的驱动方法，多条驱动电极和多条感应电极沿相同的方向延伸，多条驱动电极和多条感应电极沿相同的方向延伸，所述驱动方法包括：通过沿所述驱动电极的延伸方向上所述驱动电极的不同位置的电阻产生的信号确定触摸点的一个坐标，通过感应电极输出的信号确定触摸点的另一个坐标。
由于驱动电极和感应电极均沿同一方向延伸，因此，驱动电极和感应电极的引出线均位于同一边，从而有利于实现包括所述触摸面板的显示装置的窄边框显示。并且本发明所提供的触摸面板可以嵌入显示面板内，减小显示装置的整体厚度。
附图是用来提供对本发明的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本发明，但并不构成对本发明的限制。在附图中：
图1是现有技术中的互电容式触摸屏的示意图；
图2是图1中所示的互电容式触摸屏的等效电路图；
图3是本发明所提供的触摸面板的示意图；
图4是图3中所示的触摸面板的等效电路图；
图5是图3中所示的触摸面板中，在驱动电极的近驱动端、驱动电极的中部和驱动电极的远驱动端，在触摸前后的信号强度模拟图。
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
如图3所示，作为本发明的一个方面，提供一种触摸面板，该触摸面板包括触摸控制单元10、多个驱动电极20和多个感应电极30，
多个驱动电极20和多个感应电极30均与触摸控制单元10电连接，触摸控制单元10向多个驱动电极20提供驱动信号，其中，驱动电极20设置为与感应电极30绝缘，以在相邻的驱动电极20和感应电极30之间形成电容，多个驱动电极20和多个感应电极30沿相同的方向延伸，在沿驱动电极20延伸的方向上，该驱动电极20上不同位置处的电阻不同，感应电极30可以向触摸控制单元10输出感应信号。
当所述触摸面板应用于显示装置时，触摸控制单元10向驱动电极20提供驱动信号，并接收感应电极30输出的感应信号。如图4所示，驱动电极20和与该驱动电极20相邻的感应电极30之间形成电容。由于驱动电极20和感应电极30本身都具有内阻，即，驱动电极20和感应电极30相当于由多个电阻串联而成，因此，驱动电极20和与该驱动电极20相邻的感应电极30在近驱动端(即，靠近触摸控制单元10的一端)形成的电容不同于驱动电极20和与该驱动电极20相邻的感应电极30在远驱动端(即，远离触摸控制单元10的一端)形成的电容。由此可知，当触摸点位于靠近触摸控制单元10的一端时感应电极30上产生的感应信号的强度不同于当触摸点位于远离触摸控制单元10的一端时产生的感应信号的强度。
图5中展示了在驱动电极的近驱动端、驱动电极的近中部以及驱动电极的远驱动端处，触摸前后的感应信号强度差别。其中，纵轴表示电流，横轴表示时间。从图中可以看出，驱动电极的近驱动端的电流、驱动电极的中部的电流以及驱动电极的远驱动端的电流互不相同。因此，驱动电极上沿长度方向的各处与感应电极形成的电容也互不相同。
当操作者的手指触摸包括所述触摸面板的显示装置时，手指会使得触摸处的驱动电极20和感应电极30之间的电容发生变化，因此，感应电极30上的感应信号会发生变化，容易理解的是，当触摸点位于驱动电极20的不同长度处时，引起的感应信号的变化量是不同的。触摸控制单元可以计算出根据发生变化的感应信号判断触摸点的坐标。根据感应信号的不同，可以判断触摸点在y轴方向的坐标，根据产生感应信号的感应电极30的位置可以判断触摸点在x轴方向的坐
标。
由于驱动电极20和感应电极30均沿同一方向延伸(图3中所示的实施方式中，驱动电极20和感应电极30均沿y轴方向延伸)，因此，驱动电极20和感应电极30的引出线均位于触摸面板的同一边(在图3中所示的实施方式中，驱动电极20和感应电极30的引出线均位于触摸面板的下部)，从而有利于实现包括所述触摸面板的显示装置的窄边框显示。此外，触摸控制单元10既具有为驱动电极20提供驱动信号的功能，又具有接收感应电极30输出的感应信号的功能，相当于将背景技术中的驱动信号源101与检测电路106集成在一起，从而进一步减小了触摸面板的体积，有利于实现包括所述触摸面板的显示装置的窄边框显示。
本发明所提供的触摸面板可以嵌入显示面板内，减小显示装置的整体厚度。例如，可以将多个驱动电极20设置在阵列基板上，并将多个感应电极30设置在与阵列基板相对设置的对盒基板上。或者将驱动电极20和感应电极30分别设置在阵列基板的不同层中或者彩膜基板的不同层中。
本发明中，对制成驱动电极20和感应电极30的材料并没有特殊的限定。例如，可以利用导电金属材料制成驱动电极20和感应电极30。优选地，可以采用电阻较大的材料制成驱动电极20和感应电极30，从而可以增加驱动电极20在近驱动端的驱动信号与驱动电极20在远驱动端的信号之间的差异，从而可以更准确地判断触摸点的坐标。
进一步优选地，可以利用透明电极材料(例如，ITO)制成驱动电极20和感应电极30。与普通的金属材料相比，透明电极材料具有较大的电阻，因此，利用透明电极材料制成驱动电极20和感应电极30可以增加驱动电极20在近驱动端的电阻值与驱动电极20在远驱动端的电阻值之间的差异，并且可以增加近驱动端的感应信号与远驱动端的感应信号之间的强度差异，从而可以更准确地判断触摸点的坐标。此外，利用透明电极材料制成驱动电极20和感应电极30还不会降低显示装置的开口率。
为了提高所述触摸面板的集成化程度，优选地，所述触摸面板还可以包括驱动信号走线40，该驱动信号走线40与触摸控制单元10的输出端电连接，多个驱动电极20通过同一个驱动信号走线40与触摸控制单元10的输出端电连接。
如图2中所示，不同的感应电极30在不同的接口处与触摸控制单元相连，从而可以判断触摸点具体位于哪个感应电极30上。
如上文中所述，驱动电极20和与该驱动电极20相邻的感应电极30之间互相绝缘间隔设置。因此，作为本发明的一种优选实施方式，可以将驱动电极20和感应电极30设置在不同层中。感应电极30的个数可以与驱动电极20的个数完全相同，即，驱动电极20与感应电极30一一对应，这样设置可以增加触控的灵敏度。或者，驱动电极20与感应电极30间隔交替设置(如图3所示)，这样设置可以降低触摸面板的成本并简化触摸面板的制造工艺。使用者可以根据具体的要求具体设置感应电极30和驱动电极20的个数。例如，对触控灵敏度要求较高的场合中，可以一一对应地设置感应电极30和驱动电极20；在对触控灵敏度要求相对较低、需要较低成本的场合中，可以使得驱动电极20与感应电极30间隔设置。
优选地，驱动电极20的宽度在3mm至7mm之间，从而可以增加驱动电极20在近驱动端与远驱动端之间的驱动信号强度差异。
为了更加精确地判断触摸点的位置，优选地，可以在感应电极30与触摸控制单元10之间增加信号放大单元。当有触摸产生时，感应电极30上产生感应电流，经信号放大单元放大之后，便于触控单元判断触摸点的坐标。
作为本发明的另一个方面，提供一种显示装置，该显示装置包括触摸面板和显示面板，其中，所述触摸面板为本发明所提供的上述触摸面板。
所述显示面板可以为液晶显示面板，也可以是OLED显示面板。具体地，所述显示面板可以包括阵列基板和与所述阵列基板对盒设置的对盒基板。
本领域技术人员应当理解的是，当本发明所提供的触摸面板用
作外挂式(on-cell)的触摸面板时，还可以包括上基板和下基板，可以将驱动电极设置在下基板上，感应电极设置在上基板上。在使用时，直接将触摸面板设置在相对应的显示面板的出光表面上即可。
当然，本发明所体统的触摸面板还可以用作嵌入式(in-cell)的触摸面板。此时，触摸面板与显示面板并不是独立的两个个体，而是集成为一体。在这种情况中，所述触摸面板的多个驱动电极设置在所述阵列基板或所述对盒基板上，所述触摸面板的多个感应电极设置在所述阵列基板或所述对盒基板上。
如上文中所述，可以将多个所述驱动电极设置在阵列基板上，并将多个所述感应电极设置在与阵列基板相对设置的对盒基板上。或者将所述驱动电极和所述感应电极分别设置在阵列基板的不同层中，或者将所述驱动电极和所述感应电极分别设置在对盒基板的不同层中。
作为本发明的一种实施方式，可以将所述多个驱动电极设置在所述阵列基板和所述对盒基板中的一者上，并将所述多个感应电极设置在所述阵列基板和所述对盒基板中的另一者上。
容易理解的是，可以在所述对盒基板上设置彩膜层和黑矩阵，使所述对盒基板形成为彩膜基板，从而可以使得所述显示装置实现彩色显示。
在所述触摸面板包括所述驱动信号走线的实施方式中，所述驱动信号走线和所述触摸控制单元均可以设置在所述显示装置的走线区。该走线区可以位于所述显示装置的一侧，从而可以实现窄边框。
所述显示装置可以为手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。。
本发明实施例还提供一种触摸面板的驱动方法，多条驱动电极和多条感应电极沿相同的方向延伸，多条驱动电极和多条感应电极沿相同的方向延伸，所述驱动方法包括：通过沿所述驱动电极的延伸方向上所述驱动电极的不同位置的电阻产生的信号确定触摸点的一个坐标(例如，触摸点沿x轴的坐标)，通过感应电极输出的信号确定触摸点的另一个坐标(例如，触摸点沿y轴的坐标)。
需要说明的是，本发明实施例中的触摸控制单元集成了驱动信号源给驱动电极发射驱动信号的功能和检测电路检测感应电极输出感应信号的功能。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。
Claims (8)
- 一种触摸面板，包括触摸控制单元、多个驱动电极和多个感应电极，所述多个驱动电极和所述多个感应电极均与所述触摸控制单元电连接，所述触摸控制单元向每个所述驱动电极提供驱动信号，所述驱动电极设置为与所述感应电极绝缘，且所述多个驱动电极和所述多个感应电极沿相同的方向延伸，在沿所述驱动电极延伸的方向上，所述驱动电极上不同位置处电阻不同，所述感应电极能够向所述触摸控制单元输出感应信号。
- 根据权利要求1所述的触摸面板，还包括驱动信号走线，多个所述驱动电极通过同一条所述驱动信号走线电连接至所述触摸控制单元的驱动信号输出端。
- 根据权利要求1所述的触摸面板，其中，所述驱动电极和所述感应电极均由透明电极材料制成。
- 根据权利要求1至3中任意一项所述的触摸面板，其中，所述驱动电极和所述感应电极设置在不同层。
- 根据权利要求1至3中任意一项所述的触摸面板，其中，所述驱动电极的宽度在3mm至7mm之间。
- 根据权利要求1至3中任意一项所述的触摸面板，还包括信号放大单元，该信号放大单元连接在所述感应电极和所述触摸控制单元之间，以放大所述感应电极输出的感应信号。
- 一种显示装置，该显示装置包括触摸面板，其中，所述触摸面板为权利要求1至6中任意一项所述的触摸面板。
- 一种根据权利要求1所述触摸面板的驱动方法，其中，多条驱动电极和多条感应电极沿相同的方向延伸，所述驱动方法包括：通过沿所述驱动电极的延伸方向上所述驱动电极的不同位置的电阻产生的信号确定触摸点的一个坐标，通过感应电极输出的信号确定触摸点的另一个坐标。
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