WO2015035680A1

WO2015035680A1 - Capacitive touch display apparatus

Info

Publication number: WO2015035680A1
Application number: PCT/CN2013/085207
Authority: WO
Inventors: 莫良华; 刘卫平; 刘军桥; 刘辉
Original assignee: 敦泰科技有限公司
Priority date: 2013-09-13
Filing date: 2013-10-15
Publication date: 2015-03-19
Also published as: CN103472613A

Abstract

The present invention provides a capacitive touch display apparatus. The capacitive touch display apparatus comprises a first substrate, a second substrate, a liquid crystal layer, and a common electrode layer. The second substrate is disposed opposite to the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The common electrode layer is disposed between the first substrate and the second substrate. The common electrode layer comprises multiple electrode units disposed in a matrix arrangement manner. Each electrode unit comprises a first toothed electrode and second toothed electrode disposed opposite to each other. The first toothed electrodes and the second toothed electrodes are used as touch sensing electrodes in a touch sensing phase and are used as common electrodes in a display phase. The present invention also provides another capacitive touch display apparatus. The another capacitive touch display apparatus comprises a common electrode layer disposed between a first substrate and a second substrate. The common electrode layer comprises multiple electrodes disposed in a one-dimensional matrix arrangement manner. The multiple electrodes are used as touch sensing electrodes in a sensing phase and are used as common electrodes in a display phase. The present invention can reduce the thickness and the weight of the capacitive touch display apparatus.

Description

Capacitive touch display device The present application claims priority to Chinese Patent Application No. 201310419003.4, entitled "Capacitive Touch Display Device", filed on September 13, 2013, the entire contents of which is incorporated herein by reference. In the application. The present invention relates to the field of touch technologies, and in particular, to a capacitive touch display device. BACKGROUND OF THE INVENTION As an input medium, a touch screen is currently the most portable, convenient and natural human-computer interaction mode. As a result, touch screens are increasingly being used in a variety of electronic products, such as cell phones, notebook computers, MP3/MP4, and the like. According to the working principle and the medium for detecting touch information, the touch screen can be classified into a resistive type, a capacitive type, an infrared type, a surface acoustic wave, and the like. Among them, the capacitive touch screen technology has become the mainstream touch screen technology due to the single process, long life, and high light transmittance. Capacitive touch screens can be divided into mutual capacitive touch screens and self-capacitive touch screens. The mutual capacitance type touch screen is provided with a plurality of driving electrodes and a plurality of sensing electrodes, and the mutual capacitance of the driving electric electrodes and the sensing electrodes overlaps, and the mutual capacitance change caused by the finger touching the touch screen is measured, and the finger touches the touch screen. position. The self-capacitive touch screen detects the capacitance formed by the driving electrode or the sensing electrode and the ground end, and performs position detection based on the capacitance change caused by the finger touching the touch screen. More technical solutions for the self-capacitive touch screen can be referred to as the publication number. Chinese patent application of CN103207711A.

In order to make the display device to which the touch screen is applied lighter and thinner, the prior art has developed an in-cell touch panel technology. Referring to FIG. 1 , a liquid crystal display device with an in-cell touch panel is illustrated. The liquid crystal display device includes, in order from bottom to top, a thin film transistor (TFT) substrate 1, a liquid crystal layer 2, and color. a filter (CF, Color Filter) substrate 3, wherein the TFT substrate comprises: a first glass substrate 11. The thin film transistor 12 on the first glass substrate 11, the CF substrate includes, in order from bottom to top, a common electrode layer 31, a color filter 32, a touch panel 33, and a second glass substrate 34. Although the existing in-cell touch panel realizes the integration of the touch screen and the display device, it still cannot meet the requirements of thinning and thinning of the product. SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a capacitive touch display device that makes a capacitive touch display device thinner and lighter. In order to solve the above problems, the present invention provides a capacitive touch display device for implementing touch sensing and display, including: a first substrate; a second substrate disposed opposite to the first substrate; and a liquid crystal layer located at the first Between the substrate and the second substrate; a common electrode layer between the first substrate and the second substrate, the common electrode layer includes a plurality of electrode units arranged in a matrix, and the electrode unit includes a relative arrangement A toothed electrode and a second toothed electrode, the first toothed electrode and the second toothed electrode being used as touch sensing electrodes in the touch sensing P-intersection and as a common electrode in the display phase. Optionally, the plurality of electrode units are arranged in a single row and multi-column matrix, two rows and multiple columns matrix arrangement or a multi-row multi-column matrix arrangement, and the first toothed electrode and the second toothed electrode are arranged. The teeth extend in the column direction. Optionally, the plurality of electrode units are arranged in a single column multi-row matrix, two columns in a multi-row matrix arrangement, or a multi-column multi-row matrix arrangement, the first toothed electrode and the second toothed electrode The teeth extend in the row direction. Optionally, the first toothed electrode and the second toothed electrode are a single tooth structure or a multi-tooth structure. Optionally, the teeth of the first toothed electrode and the second toothed electrode are triangular or trapezoidal. Optionally, the electrode unit comprises one or more first toothed electrodes and one or more second toothed electrodes. Alternatively, the different electrode units have the same number of teeth or a different number of teeth. Alternatively, the shapes of the toothed electrodes in the same electrode unit are the same or different. Alternatively, the shapes of the toothed electrodes in the different electrode units are the same or different. Optionally, the common electrode layer has a single layer structure, or the common electrode layer is a multi-layer structure electrically connected to each other. Optionally, the method further includes: displaying a touch chip, electrically connecting to the first tooth electrode and the second tooth electrode of each electrode unit, respectively, for driving the device in a time division manner, and detecting each electrode unit in a touch sensing phase The capacitance changes of the first toothed electrode and the second toothed electrode are applied to the first toothed electrode and the second toothed electrode in each of the electrode units in the display phase to load the common electrode voltage and drive the display pixel electrode. Optionally, the display touch chip is configured to detect a self-capacitance of the first toothed electrode and the second toothed electrode in each of the electrode units. Optionally, the display touch chip includes: a touch control circuit, configured to respectively detect a change in capacitance of the first toothed electrode and the second toothed electrode in each electrode unit during touch sensing; and a display control circuit, configured to Displaying a common electrode voltage to the first and second toothed electrodes in each of the electrode units and driving the display pixel electrode; the touch control circuit and the display control circuit are coupled by a communication device, the touch control The circuit is configured to notify the display control circuit to display by the communication device after the touch sensing ends, and the display control circuit is configured to notify the touch control circuit to perform touch sensing by the communication device after the display ends. Optionally, the plurality of electrode units are arranged in a matrix of two rows and a plurality of rows, and the touch control circuit includes: a first touch control circuit, configured to respectively detect the first one of each electrode unit in the first column during touch sensing a capacitance change of the toothed electrode and the second toothed electrode; and a second touch control circuit for detecting a change in capacitance of the first toothed electrode and the second toothed electrode in each of the electrode units of the second column during touch sensing; The first touch control circuit and the second touch control circuit are respectively located at two sides of the display control circuit. Optionally, the display touch chip includes: a touch control circuit, configured to respectively detect capacitance changes of the first toothed electrode and the second toothed electrode in each electrode unit; and a display control circuit for each electrode unit The first toothed electrode and the second toothed electrode load a common electrode voltage and drive the display pixel electrode; a main control circuit coupled to the touch control circuit and the display control circuit for triggering the touch control in a time-sharing manner a circuit and the display control circuit. Optionally, the display touch chip further includes: a plurality of first switches located between the first toothed electrode or the second toothed electrode and the touch control circuit, and the capacitor when the first switch is in communication Touch display device performs touch sensing; a plurality of second switches are located between the first toothed electrode or the second toothed electrode and the display control circuit, and the capacitive touch display device performs when the second switch is in communication display. Optionally, the method further includes: connecting wires for implementing electrical connection between the first toothed electrode or the second toothed electrode and the display touch chip. Optionally, the connecting wire is in the same layer as the common electrode layer. Optionally, the connecting wire and the common electrode layer are located in different layers, and the connecting wire is electrically connected to the first toothed electrode or the second toothed electrode through the through hole. Optionally, the through hole corresponds to a position of the first toothed electrode or the second toothed electrode. Optionally, the material of the connecting wire is an opaque conductive material, and the connecting wire corresponds to a position of a non-light transmitting region in the capacitive touch display device. Optionally, the connecting wires correspond to positions of the black matrix. Optionally, the capacitive touch display device is an FFS type display device; a thin film transistor and a pixel electrode are sequentially disposed on the second substrate; and the common electrode layer is located between the liquid crystal layer and the pixel electrode. Optionally, the connecting wire is disposed in the common electrode layer. Optionally, a conductive layer is disposed between the common electrode layer and the liquid crystal layer or between the common electrode layer and the pixel electrode, and an insulating layer is disposed between the conductive layer and the common electrode layer; The connecting wire is disposed in the conductive layer, and the connecting wire is electrically connected to the first toothed electrode or the second toothed electrode in the common electrode layer through a through hole penetrating the insulating layer. Optionally, the method further includes a control line layer and a data line layer sequentially located on the second substrate; the connection wire is located in the control line layer, and insulation is disposed between the common electrode layer and the control line layer a layer, the connecting wire is electrically connected to the first toothed electrode or the second toothed electrode in the common electrode layer through a through hole penetrating the insulating layer. Optionally, the method further includes a control line layer and a data line layer sequentially located on the second substrate; the connection wire is located in the data line layer, and insulation is disposed between the common electrode layer and the data line layer a layer, the connecting wire is electrically connected to the first toothed electrode or the second toothed electrode in the common electrode layer through a through hole penetrating the insulating layer. Optionally, the capacitive touch display device is a TN type display device; a color filter layer is further disposed between the first substrate and the common electrode layer; and the common electrode layer is located on the liquid crystal layer Between the color filter layers. Optionally, the connecting wire is disposed in the common electrode layer. Optionally, a conductive layer is disposed between the common electrode layer and the liquid crystal layer, and an insulating layer is disposed between the conductive layer and the common electrode layer; the connecting wire is disposed in the conductive layer. The connecting wire is electrically connected to the first toothed electrode or the second toothed electrode in the common electrode layer through a through hole penetrating the insulating layer. Optionally, the material of the common electrode layer is indium tin oxide or graphene. Optionally, the material of the connecting wire is indium tin oxide, graphene or metal. Correspondingly, the present invention further provides a capacitive touch display device for implementing touch sensing and display, comprising: a first substrate; a second substrate disposed opposite to the first substrate; and a liquid crystal layer located at the first Between the substrate and the second substrate; a common electrode layer, located in the Between the first substrate and the second substrate, the common electrode layer includes a plurality of electrodes arranged in a one-dimensional matrix, the plurality of electrodes serving as touch sensing electrodes in the sensing phase and serving as a common electrode in the display phase. Optionally, the electrode shape is a regular polygon, a strip shape, a circle shape or an elliptical shape. Optionally, the method further includes: displaying a touch chip, electrically connecting each electrode, for triggering the touch sensing phase and the display phase, and detecting the capacitance change of each electrode in the touch sensing phase, respectively. Each electrode is loaded with a common electrode voltage. Optionally, the display touch chip is configured to detect a self-capacitance of each electrode. Optionally, the display touch chip includes: a touch control circuit, configured to respectively detect a change in capacitance of each electrode during touch sensing; a display control circuit configured to load a common electrode voltage to each electrode during display; the touch The control circuit and the display control circuit are coupled by a communication device, and the touch control circuit is configured to notify the display control circuit to display by the communication device after the touch sensing ends, and the display control circuit is configured to display After the end, the touch control circuit is notified by the communication device to perform touch sensing. Optionally, the display touch chip comprises: a touch control circuit for respectively detecting a capacitance change of each electrode; a display control circuit for loading a common electrode voltage to each electrode; a main control circuit, and the touch control circuit And the display control circuit is coupled to trigger the touch control circuit and the display control circuit in a time-sharing manner. Optionally, the display touch chip further includes: a plurality of first switches located between the electrodes and the touch control circuit, wherein the capacitive touch display device performs touch sensing when the first switch is in communication; The second switch is located between each electrode and the display control circuit, and the capacitive touch display device performs display when the second switch is in communication. Optionally, the method further includes: connecting wires located in a plurality of electrode peripheral regions of the one-dimensional matrix arrangement for implementing electrical connection between the electrodes and the display touch chip. Optionally, the connecting wire is disposed on the common electrode layer. Optionally, the connecting wire and the common electrode layer are located in different layers, and the connecting wire is electrically connected to the electrode through the through hole. Optionally, the through hole corresponds to a position of the electrode. Optionally, the material of the connecting wire is an opaque conductive material, and the connecting wire corresponds to a position of a non-light transmitting region in the capacitive touch display device. Optionally, the connecting wires correspond to positions of the black matrix. Optionally, the capacitive touch display device is an FFS type display device; a thin film transistor and a pixel electrode are sequentially disposed on the second substrate; and the common electrode layer is located between the liquid crystal layer and the pixel electrode. Optionally, the connecting wire is disposed in the common electrode layer. Optionally, a conductive layer is disposed between the common electrode layer and the liquid crystal layer or between the common electrode layer and the pixel electrode, and an insulating layer is disposed between the conductive layer and the common electrode layer; The connecting wire is disposed in the conductive layer, and the connecting wire is electrically connected to an electrode in the common electrode layer through a through hole penetrating the insulating layer. Optionally, the method further includes a control line layer and a data line layer sequentially located on the second substrate; the connection wire is located in the control line layer, and insulation is disposed between the common electrode layer and the control line layer a layer, the connecting wire is electrically connected to an electrode in the common electrode layer through a through hole penetrating the insulating layer. Optionally, the method further includes a control line layer and a data line layer sequentially located on the second substrate; the connection wire is located in the data line layer, and insulation is disposed between the common electrode layer and the data line layer a layer, the connecting wire is electrically connected to an electrode in the common electrode layer through a through hole penetrating the insulating layer. Optionally, the capacitive touch display device is a TN type display device; a color filter layer is further disposed between the first substrate and the common electrode layer; and the common electrode layer is located on the liquid crystal layer Between the color filter layers. Optionally, the connecting wire is disposed in the common electrode layer. Optionally, a conductive layer is disposed between the common electrode layer and the liquid crystal layer, and an insulating layer is disposed between the conductive layer and the common electrode layer; the connecting wire is disposed in the conductive layer. The connecting wires are electrically connected to the electrodes in the common electrode layer through through holes penetrating the insulating layer. Optionally, the material of the common electrode layer is indium tin oxide or graphene. Optionally, the material of the connecting wire is indium tin oxide, graphene or metal. Compared with the prior art, the technical solution of the present invention has the following advantages: the first toothed electrode and the second toothed electrode of the common electrode layer are also used as a touch sensing electrode while serving as a common electrode, reducing capacitive touch The thickness of the display device can also reduce the weight of the capacitive touch display device. The plurality of electrodes arranged in a one-dimensional matrix in the common electrode layer are also used as a touch sensing electrode while serving as a common electrode, which reduces the thickness of the capacitive touch display device and also reduces the weight of the capacitive touch display device. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a prior art touch screen liquid crystal display device; FIG. 2 is a side view of a first embodiment of a capacitive touch display device of the present invention; FIG. 4 is a schematic view of a second embodiment of a capacitive touch display device of the present invention; FIG. 5 is a schematic view showing an embodiment of the touch chip of FIG. 4; Figure 7 is a side view taken along line AA' of Figure 4; Figure 8 is a schematic view of the principle of implementing touch sensing by the common electrode layer of Figure 4; Figure 9 is a schematic view of another embodiment of the electrode unit of Figure 4; Figure 10 is a schematic view of still another embodiment of the electrode unit of Figure 4; Figure 11 is a schematic view of another embodiment of the common electrode layer of Figure 4; Figure 13 is a schematic view of still another embodiment of the common electrode layer of Figure 4; Figure 14 is a schematic view of a third embodiment of the capacitive touch display device of the present invention; Figure 15 is a through hole of Figure 14 FIG. 16 is a schematic view showing a fourth embodiment of the capacitive touch display device of the present invention; FIG. 17 is a schematic view showing a fifth embodiment of the capacitive touch display device of the present invention; 18 is a schematic view of a sixth embodiment of a capacitive touch display device of the present invention; FIG. 19 is a schematic view of a seventh embodiment of a capacitive touch display device of the present invention; Figure 21 is a schematic view showing a ninth embodiment of the capacitive touch display device of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The above described objects, features and advantages of the present invention will become more apparent from the embodiments of the invention. 2 and 3, a side view of a first embodiment of a capacitive touch display device of the present invention and a top view of a common electrode layer are shown. It should be noted that, in order to make the drawing more clear, the main functional components of the capacitive touch display device are only illustrated in the drawings, and the present invention should not be limited thereto. The capacitive touch display device of the embodiment can implement the functions of touch sensing and display. It should be noted that the Fringe Field Switching (FFS) is used in this embodiment. The liquid crystal display device is described as an example, but the present invention is not limited thereto. The capacitive touch display device includes a first substrate 101 serving as a glass substrate on the side of a color filter 107 (Color Filter, CF). The second substrate 102 is used as a glass substrate on the side of a thin film transistor (TFT). The second substrate 102 is disposed opposite to the first substrate 101. The second substrate 102 is further provided with a thin film transistor 106. a pixel electrode (not shown) on the thin film transistor 106 connected to the drain of the thin film transistor 106. The second substrate 102 is further provided with a control line layer 1052 between the thin film transistor 106 and the pixel electrode and a data line layer 1051 located on the control line layer 1052. The control line layer 1052 is provided with a plurality of gate lines (not shown), and is electrically connected to the gate of the thin film transistor 106 for loading a driving signal to the gate of the thin film transistor 106; The line layer 1051 is provided with a plurality of data lines (Source Line, not shown) connected to the source of the thin film transistor 106 for supplying a pixel voltage to the source of the thin film transistor 106. The liquid crystal layer 103 is located on the first substrate. Between the 101 and the second substrate 102; the common electrode layer 104 is located between the first substrate 101 and the second substrate 102. In this embodiment, the common electrode layer 304 is located between the liquid crystal layer 103 and the pixel electrode. More specifically, the common electrode layer 104 is located between the data line layer 1051 and the liquid crystal layer 103. . The common electrode layer 104 includes a plurality of electrode units 110 arranged in a matrix, and the electrode unit 110 includes a first toothed electrode 1101 and a second toothed electrode 1102 disposed opposite to each other, the first toothed electrode 1101 and The second toothed electrode 1102 functions as a touch sensing electrode in the touch sensing phase and as a common electrode in the display phase. Specifically, the first and second toothed electrodes 1101 and 1102 may be formed using a transparent conductive material such as indium tin oxide (ITO). In this embodiment, the first toothed electrode 1101 and the second toothed electrode 1102 are both in a double-toothed structure, and the first and second toothed electrodes 1101 and 1102 are arranged in a toothed manner, and The teeth of the first toothed electrode 1101 and the second toothed electrode 1102 extend in the row direction, so that the first toothed electrode 1101 and the second toothed electrode 1102 constitute a rectangular electrode unit 110. With reference to FIG. 3, in the embodiment, the plurality of rectangular electrode units 110 are arranged in a matrix of two rows (ie, Y directions) in multiple rows (ie, the X direction), thereby causing the plurality of electrode units 130. It is disposed in the entire layer of the common electrode layer 104. In the display phase, each of the first and second toothed electrodes 1101 and 1102 is loaded with the same common electrode voltage, so that each of the plurality of electrode units 130 and the first toothed electrode 1101 and the second toothed electrode 1102 Acts as a common electrode. The first toothed electrode 1101 or the second toothed electrode 1102 located in each of the electrode units 110 may form a self-capacitance during the touch sensing phase, and by detecting the change of the self-capacitance, the position of the finger touch may be obtained, thereby realizing the touch. induction. In this embodiment, the plurality of electrode units 110 are arranged in a matrix of two rows and a plurality of rows, and the capacitive touch display device can realize two-point touch detection in the column direction. However, the present invention does not limit the number and arrangement of the electrode units 110. It can be seen that the first toothed electrode 1101 and the second toothed electrode 1102 of the common electrode layer 104 in this embodiment can also be used as a touch sensing electrode while serving as a common electrode, reducing the thickness of the capacitive touch display device. It is also possible to reduce the weight of the capacitive touch display device. In addition, the capacitive touch display device can also increase the light transmittance by reducing one electrode layer (common electrode layer or touch sensing electrode layer). Referring to FIG. 4, a schematic diagram of a second embodiment of a capacitive touch display device of the present invention is illustrated. This embodiment will be described by taking a planar conversion type liquid crystal display device as an example. The difference between the present embodiment and the first embodiment is not mentioned. The difference between the present embodiment and the first embodiment is as follows: The capacitive touch display device of this embodiment further includes: The touch chip 130 is electrically connected to the first toothed electrode 1101 and the second toothed electrode 1102 of each electrode unit 110 for driving the device in a time-sharing manner to realize touch sensing and display in a time-sharing manner. Specifically, in the touch sensing stage, the display touch chip 130 detects capacitance changes of the first toothed electrode 1101 and the second toothed electrode 1102 in each of the electrode units 110. The display touch chip 130 is configured to detect the self-capacitance of the first toothed electrode 1101 and the second toothed electrode 1102 in each of the electrode units 110, but the invention does not limit this. Specifically, in the embodiment, the display touch chip 130 is configured to detect the self-capacitance of the first toothed electrode 1101 and the second toothed electrode 1102 in each of the electrode units 110, but the invention does not limit this. In the display stage, the display touch chip 130 applies a common electrode voltage to each of the first and second toothed electrodes 1101 and 1102 in each of the electrode units 110. In addition, in the display stage, the display touch chip 130 further applies a driving voltage to the thin film transistor 106 through the gate line, and supplies a pixel voltage to the source of the thin film transistor 106 through the data line, and the pixel voltage passes through the drain of the thin film transistor 106. It is loaded to a pixel electrode (not shown) located above the thin film transistor 106, thereby driving the display pixel electrode. This embodiment provides a separate display touch chip 130 for loading different signals to the first toothed electrode 1101 and the second toothed electrode 1102, so that the first toothed electrode 1101 and the second of each electrode unit 110 The toothed electrode 1102 can function as a common electrode and as a touch sensing electrode. However, the present invention is not limited to the provision of a separate display touch chip 130. In other embodiments, the function of the display touch chip 130 can also be integrated into the driving circuit of the LCD. Referring to FIG. 5, a schematic diagram of an embodiment of the display touch chip shown in FIG. 4 is shown. Specifically, the display touch chip 130 may include the following circuit unit in order to implement the touch sensing and display control of the plurality of electrode units 110: The touch control circuit 132 is configured to respectively detect the first electrode unit 110 in the touch sensing The capacitance of one of the toothed electrode 1101 and the second toothed electrode 1102 changes; The display control circuit 131 is configured to load the common electrode voltage and drive the display pixel electrode to the first toothed electrode 1101 and the second toothed electrode 1102 in each of the electrode units 110 during display; in the embodiment, the touch control circuit 132 The display control circuit 131 is coupled to the display control circuit 131 by a communication device (not shown), and the touch control circuit 132 is configured to notify the display control circuit 131 to display by the communication device after the touch sensing ends, the display The control circuit 131 is configured to notify the touch control circuit 132 of the touch sensing by the communication device after the display ends. Specifically, as shown in FIG. 5, the display touch chip 130 includes: a plurality of first switches S1, S2, S3, ..., Sn-1, Sn, located at the first toothed electrode 1101 or the second toothed electrode 1102. Between the touch control circuit 132, the first switch S1, S2, S3 ...

The capacitive touch display device performs touch sensing when Sn-1 and Sn are connected. The display control circuit 131 controls the first switches S1, S2, S3, ..., Sn-1, and Sn to communicate through the communication device after the display ends, thereby controlling the touch control circuit 132 to perform touch sensing detection. The display touch chip 130 further includes: a plurality of second switches C1, C2, C3, ..., Cn-1, Cn, located at the first toothed electrode 1101 or the second toothed electrode 1102 and the display control circuit 131 The capacitive touch display device performs display when the second switches C1, C2, C3, ..., Cn-1, Cn are in communication. The touch control circuit 132 drives the display of the second switches C1, C2, C3, ..., Cn-1, Cn through the communication device after the end of the touch sensing, thereby driving the display control circuit 131 to display. The present invention does not limit the implementation of the display touch chip 130. Referring to FIG. 5, the display touch chip 130 may include: a touch control circuit 132 for detecting capacitance changes of the first toothed electrode 1101 and the second toothed electrode 1102 in each electrode unit 110 during touch sensing. a display control circuit 131 for loading a common electrode voltage and driving the display pixel to the first toothed electrode 1101 and the second toothed electrode 1102 in each of the electrode units 110 during display And a main control circuit 133 coupled to the touch control circuit 132 and the display control circuit 131 for time-divisionally driving the touch control circuit 132 and the display control circuit 131 to implement time sharing Touch and display. That is, the present embodiment realizes time-sharing control of the display phase and the touch sensing phase by providing a main control circuit 133 connected to both the touch control circuit 132 and the display control circuit 131. Specifically, the display touch chip 130 may further include a plurality of first switches S1, S2, S3, ..., Sn-1, Sn, located at the first toothed electrode 1101 or the second toothed electrode 1102 and the touch control circuit. 132, the first switch S1, S2, S3, ..., Sn-1, Sn are coupled to the main control circuit 133, the first switch S1, S2, S3, ..... Sn-1,

The capacitive touch display device performs touch sensing when Sn is connected under the control of the main control circuit 133. a plurality of second switches C1, C2, C3, ..., Cn-1, Cn are located between the first toothed electrode 1101 or the second toothed electrode 1102 and the display control circuit 131, and the second switch C1, C2 C3, Cn are coupled to the main control circuit 133, and the second switches C1, C2, C3, ..., Cn-1, Cn are controlled by the main control circuit 133. The capacitive touch display device performs display when connected downward. The present invention shows that the control chip 130 can have other implementations as well. Referring to Figure 6, a schematic diagram of another embodiment of a touch sensitive chip is shown. For the embodiment in which the plurality of electrode units shown in FIG. 4 are arranged in a matrix of two rows and a plurality of rows, the touch control circuit 130 may include: a first touch control circuit 231, configured to detect the first one during touch sensing The capacitances of the first and second toothed electrodes 1011 and 1012 are changed. The second touch control circuit 232 is configured to detect the first tooth shape of each of the second electrode units in the second column during touch sensing. The capacitance of the electrode 1011 and the second toothed electrode 1012 changes; The display control circuit 230 is configured to load the common electrode voltage and drive the display pixel electrode to the first toothed electrode 1011 and the second toothed electrode 1012 in each electrode unit during display; in this embodiment, the first touch control circuit 231 and the second touch control circuit 232 are respectively located at two sides of the display control circuit 230. With this circuit layout, the display touch chip can be made compact and occupy a small space. With reference to FIG. 4 , the capacitive touch display device of the present embodiment further includes: a plurality of connecting wires 120 for electrically connecting the first toothed electrode 1101 or the second toothed electrode 1102 to the display touch chip 130 . Specifically, the connecting wire 120 includes a first connecting wire, and one end of the first connecting wire is in contact with the first toothed electrode 1101, and the other end is in contact with the display touch chip 130, and is used for the first tooth. The shaped electrode 1101 transmits a common electrode voltage and is also used to transmit a touch detection signal corresponding to the first toothed electrode 1101. The connecting wire 120 further includes a second connecting wire, the second connecting wire is in contact with the second toothed electrode 1102, and the other end is in contact with the display touch chip 130 for the second toothed electrode. 1102 transmits a common electrode voltage, and is also used to transmit a touch detection signal corresponding to the second toothed electrode 1102. Referring to Figure 7, a side view of the capacitive touch display device taken along line AA of Figure 4 is shown. In this embodiment, the connecting wires 120 (including the first connecting wires and the second connecting wires) are located in the same layer as the common electrode layer 104. The connecting wire 120 may be formed of a transparent conductive material such as indium tin oxide (ITO). However, the present invention is not limited to the connection of the conductive material. It should be noted that, in the embodiment shown in FIG. 4, the first toothed electrode 1101 and the second toothed electrode 1102 are both double-toothed structures, but the invention is not limited thereto. Referring to Figure 8, a schematic diagram of another embodiment of a common electrode layer is shown. The difference between this embodiment and that shown in FIG. 4 is that a plurality of electrode units in the common electrode layer in this embodiment 310 is a matrix arrangement of a plurality of rows. And each of the electrode units 310 includes: a single toothed first toothed electrode 3101 and a single toothed second toothed electrode 3102. Next, the principle of the touch-sensing by the first toothed electrode 3101 and the second toothed electrode 3102 will be described with reference to the configuration of the common electrode layer shown in FIG. Here 1L, 2L

(M-1) L, ML, (M+ 1 represents a plurality of first toothed electrodes 3101, 1R, 2R

(M-1) R, MR, (M+ 1 ) R represents a plurality of second toothed electrodes 3102, where M is an integer greater than or equal to 2. When the touch occurs at the position shown by the black dot in Fig. 8, (M-1) L, ML, (M+1) L, (M-1) R, MR, (M+1) R on the toothed electrode The amount of change is detected, with the ML electrode having the largest amount of change. The amount of change of each electrode measured by the touch chip is represented by D1, D2, D3, D4, D5, and D6, and it is assumed that the length of the first toothed electrode 3101 or the second toothed electrode 3102 corresponding to the Y direction is Y0, X. The width in the direction is X0. The Y-axis coordinate can be obtained by the center of gravity algorithm, which is: γ_ (ΡΙ + Ρ4)*(Μ-ϊ) + (Ρ2 + Ρ5)*Μ + (Ρ3 + Ρ6)*(Μ + 1)^ _γο (工)~ DI + D2 + D3 + D4 + D5 + D6

The X-axis coordinates are obtained by a proportional algorithm, which is specifically as follows:

Χ_ D4 + D5 + D6 , _rQ

DI + D2 + D3 + D4 + D5 + D6 ( 2 ) It should be noted that if the common electrode layer includes two rows and columns of matrix electrode units 310, that is, the common electrode layer includes in the X direction: Column electrode unit 310 and second column electrode unit 310. At this time, when calculating the coordinates, the X-axis direction is divided into two regions, the first region coordinate range is 0~(1/2)Χ0, and the second region is (1/2)X0 X0.

Specifically, when the touch occurs, the Y-axis coordinate is still obtained by the above formula (1), and if the touch occurs in the first region in the X-axis direction (ie, the detected maximum amount of change is in the first column electrode unit),

D4 + D5 + D6 X0

DI + D2 + D3 + D4 + D5 + D6 If the touch occurs in the second zone (ie, the detected maximum amount of change is in the second column of electrode units), then

Γ_ 0 _| D4 + D5 + D6 * Χ0

2 DI + D2 + D3 + D4 + D5 + D6 2 (4) Similarly, if the common electrode layer includes two rows and columns of matrix electrode units 310, that is, the common electrode layer includes: The row electrode unit 310 and the second row electrode unit 310, when calculating the coordinates, divide the Υ-axis direction into two regions, the first region coordinate range is 0~(1/2)Υ0, and the second region is (1/2) ) Υ0~Υ0. When the touch occurs, the X-axis coordinate is still obtained by the above formula (2). If the touch occurs in the first zone (ie, the maximum value of the detected change is in the first zone), then γ_(Ρ1 + D4) * (M - 1) + (D2 + D5)*M + (D3 + D6) * ( + 1) ^ 70 ( ₅ )

~ DI + D2 + D3 + D4 + D5 + D6 2

If the touch occurs in the second zone (ie, the maximum value of the change is in the second zone), then γ_ Υ0 _| (Ρ1 + Ρ4)*(Μ -1) + (Ρ2 + Ρ5)*Μ + (Ρ3 + Ρ6)* (Μ + 1) ^ 70

~ 2 DI + D2 + D3 + D4 + D5 + D6 2 The coordinate position information of the touch occurrence point is obtained, and the touch feeling to the touch position is completed. Specifically, in a practical application, the capacitive touch display device may further include a coordinate calculation unit connected to the display touch chip, the arrangement manner of the electrode unit 310 in the common electrode layer, and the measurement of the display touch chip. The amount of change in the self-capacitance of the one toothed electrode 3102 and the second toothed electrode 3102 is coordinate calculated using the above formula to complete the touch sensing. It should also be noted that the first toothed electrode of the single-tooth structure shown in FIG. 8 is shown here.

The 3101 and the second toothed electrode 3102 will be described as an example. For the first toothed electrode and the second toothed electrode of the multi-tooth structure, the multi-tooth is required as a whole, and the coordinate calculation is performed in a similar manner to the formula (1) to the formula (6). A person skilled in the art can modify, modify and replace accordingly according to the above embodiments. The present invention does not limit the structure of the first toothed electrode and the second toothed electrode, and may be The double-tooth structure shown in Fig. 4 or the single-tooth structure shown in Fig. 8 may have other structures. As shown in FIG. 9, the electrode unit 210 includes a first toothed electrode 2101 having a three-tooth structure and a second toothed electrode 2102 having a three-toothed structure. In addition, for the first toothed electrode and the second toothed electrode of the multi-tooth structure, as shown in FIG. 4 and FIG. 9, the teeth and the teeth are connected by the material of the toothed electrode to form a whole body. Toothed electrode. However, the invention is not limited thereto. As shown in FIG. 10, the electrode unit 220 includes a first toothed electrode 2201 composed of three single-teeth electrodes and a second toothed electrode 2202 composed of three single-teeth electrodes. The three single-tooth electrodes are connected by the first connecting wire 2203 to form the first toothed electrode 2201; the three single-toothed electrodes are connected by the second connecting wire 2204 to form the second toothed electrode 2202.

In the two-row, multi-row matrix arrangement shown in FIG. 4, the arrangement of the electrode units may have other implementations. As shown in FIG. 11, the plurality of electrode units 214 are a single-row (Y-direction) multi-row (X-direction) matrix arrangement, and the tooth edges of the first and second tooth electrodes of the plurality of electrode units 214 The line (X direction) extends. Alternatively, as shown in FIG. 12, the plurality of electrode units 314 are arranged in a matrix of two rows (X direction) in a plurality of columns (Y direction), and the first and second tooth electrodes of the plurality of electrode units 314 The teeth extend in the column (Y direction) direction. The electrode units respectively located in different rows in the common electrode layer shown in FIG. 12 can independently perform touch sensing detection, and thus the capacitive touch display device can realize two-point touch detection in the row direction. Alternatively, as shown in FIG. 13, the plurality of electrode units 414 are arranged in a matrix of a single row (X direction) in a plurality of columns (Y direction). The first and second toothed electrodes of the plurality of electrode units 414 extend in the column (Y direction) direction. In other embodiments, the plurality of electrode units may also be larger than two rows greater than two columns. The plurality of columns are arranged in a matrix, and the first and second toothed electrodes may extend in the row direction or may extend in the column direction. The shape of the toothed electrode is not limited in the present invention, and may be a trapezoidal tooth electrode as shown in FIG. 3, FIG. 4, FIG. 9, FIG. 11 to FIG. 13, or a triangular tooth as shown in FIG. 8 and FIG. Shape electrode. Alternatively, the toothed electrode may be other patterns, and those skilled in the art may modify, deform, and replace the pattern of the toothed electrode according to the above embodiment. In the above embodiment, the electrode units each include a first toothed electrode and a second toothed electrode. However, the present invention is not limited thereto. In other embodiments, the electrode unit may further include two or more first toothed electrodes, and two or more second toothed electrodes. In addition, in the above embodiment, the electrode units each have the same number of tooth shapes, for example: each electrode unit is a single-tooth first tooth-shaped electrode and a second tooth-shaped electrode, but the invention does not limit this. In other embodiments, the electrode unit may further have different numbers of tooth shapes, for example: the partial electrode unit is a single-tooth first tooth-shaped electrode and a second tooth-shaped electrode, and the remaining electrode units are multi-tooth first teeth. a shaped electrode and a second toothed electrode. In the above embodiment of the invention, the electrode shapes of the first toothed electrode and the second toothed electrode of the electrode unit are the same. For example: Each of the electrode units is a trapezoidal first toothed electrode and a second toothed electrode, but the invention is not limited thereto. In other embodiments, the shape of the toothed electrodes in different electrode units may also differ. For example: the partial electrode unit is a trapezoidal first toothed electrode and a second toothed electrode, and the remaining electrode units are a triangular first toothed electrode and a second toothed electrode. In addition, the shapes of the electrodes of the first and second toothed electrodes in the same electrode unit are the same, but the invention is not limited thereto. In other embodiments, the electrodes are located in the same electrode unit. The shape can also be different. For example: the first toothed electrode of the same electrode unit is trapezoidal, and the second toothed electrode is triangular; or, the first toothed electrode (second toothed electrode) of the same electrode unit portion is trapezoidal, and the other first toothed electrode ( The second toothed electrode) is a triangle. It should also be noted that in the above embodiment, the common electrode layer has a single layer structure. However, the present invention is not limited thereto. In other embodiments, the common electrode layer may also be a multi-layer structure electrically connected to each other, wherein each layer has a thickness in the range of 0.05 to 0.15 μm, and multiple layers. The thickness of the common electrode layer of the structure is small, and the weight of the capacitive touch display device can also be reduced. In addition, an anti-reflection film may be disposed on the common electrode layer of the multi-layer structure to ensure the transmittance of the capacitive touch display device. Referring to Figure 14, a schematic diagram of a third embodiment of a capacitive touch display device of the present invention is shown. This embodiment still takes an FFS type display device as an example. The difference between the embodiment and the embodiment shown in FIG. 7 is not mentioned. The difference between the embodiment and the embodiment shown in FIG. 7 is that the capacitive touch display device includes: a first substrate 201, The glass substrate on the side of the color filter 207 is used. The second substrate 202 is used as a glass substrate on the side of the thin film transistor. The second substrate 202 is disposed opposite to the first substrate 201. The second substrate 202 is further provided with a thin film transistor 206 located at the thin film transistor 206. A pixel electrode (not shown) connected to the drain of the thin film transistor 206 is provided. The second substrate 202 is further provided with a control line layer 2052 between the thin film transistor 206 and the pixel electrode and a data line layer 2051 located on the control line layer 2052. The control line layer 2052 is provided with a plurality of gate lines electrically connected to the gate of the thin film transistor 206 for loading a driving signal to the gate of the thin film transistor 206; the data line layer 2051 is provided with a plurality of data lines. a line connected to the source of the thin film transistor 206 for supplying a pixel voltage to the source of the thin film transistor 206; a liquid crystal layer 203 between the first substrate 201 and the second substrate 202; and a common electrode layer 204 including Electrode units (not labeled in the figure), the electrode unit includes a first toothed electrode (not labeled in the drawing) and a second toothed electrode (not labeled in the figure). The common electrode layer 204 is further provided with an insulating layer 209 and the insulating layer Conductive layer 210 on 209. The insulating layer 209 is used for insulating the common electrode layer 204 and the conductive layer 210. The conductive layer 210 is provided with connecting wires (not shown), and the connecting wires pass through the through holes 209 penetrating the insulating layer 209. Electrical connection is made to the first toothed electrode or the second toothed electrode in the common electrode layer 204. Referring to FIG. 15, a schematic diagram showing the relative positional relationship between the through hole and the first toothed electrode or the second toothed electrode in FIG. 14 is shown. The through hole 209 in FIG. 15 corresponds to the position of the first toothed electrode 2041 or the second toothed electrode 2042. Specifically, the through hole 209 is located above the first toothed electrode 2041 or the second toothed electrode 2042, and is transparent to the first toothed electrode 2041 or the second toothed electrode 2042 in the capacitive touch display device. The direction (bottom up) is coincident (i.e., the projection of the via 209 in the common electrode layer 204 falls into the region where the first toothed electrode 2041 or the second toothed electrode 2042 is located). The connecting wires are different from the common electrode layer 204. The connecting wires may be made of a light-transmitting conductive material such as indium tin oxide or graphene, or an opaque conductive material such as metal. Specifically, when the connecting wires are made of an opaque conductive material, the connecting wires correspond to the positions of the black matrix in the color filter 207. That is to say, in the direction of light transmission, the connecting wires coincide with the black matrix, which can prevent the connecting wires from blocking the light and avoid the decrease of the aperture ratio. In this embodiment, the connecting wire and the common electrode layer are layered, and the common electrode layer is simply used to set the electrode unit, and the area of the common electrode layer can be set, so that the first toothed electrode and the second toothed electrode can be added. The number to increase the sensitivity of touch sensing. A schematic view of a fourth embodiment of the capacitive touch display device of the present invention is shown with reference to FIG. This embodiment still takes an FFS type display device as an example. The difference between this embodiment and the embodiment shown in FIG. 14 is not mentioned. The difference between this embodiment and the embodiment shown in FIG. 14 is that an insulating layer 309 is disposed under the common electrode layer 304 and is located at the insulating layer. a conductive layer 310 under the layer 309, that is, the conductive layer 310 is disposed on the common electrode layer 304 Between the pixel electrodes (not shown). The insulating layer 309 is used to achieve insulation between the common electrode layer 304 and the conductive layer 310. A connecting wire (not shown) is disposed in the conductive layer 310, and the connecting wire is realized by a first toothed electrode or a second toothed electrode in the common electrode layer 304 through the through hole 309 of the insulating layer 308. Electrical connection. In this embodiment, the through hole 309 may also correspond to the position of the first toothed electrode or the second toothed electrode. Specifically, the through hole 309 is located below the first toothed electrode or the second toothed electrode, and coincides with the first toothed electrode or the second toothed electrode in the light transmitting direction of the capacitive touch display device. . A schematic view of a fifth embodiment of the capacitive touch display device of the present invention is shown with reference to FIG. This embodiment still takes an FFS type display device as an example. The capacitive touch display device of this embodiment includes: a first substrate 401 serving as a glass substrate on the side of the color filter 407. The second substrate 402 serves as a glass substrate on the thin film transistor side, and the second substrate 402 is disposed opposite to the first substrate 401. A thin film transistor 406 and a pixel electrode (not shown) connected to the drain of the thin film transistor 106 on the thin film transistor 406 are further disposed on the second substrate 402. The second substrate 402 is further provided with a control line layer 4052 between the thin film transistor 406 and the pixel electrode, and a data line layer 4051 located on the control line layer 4052. The control line layer 4052 is provided with a plurality of gate lines electrically connected to the gate of the thin film transistor 406 for loading a driving signal to the gate of the thin film transistor 406; the data line layer 4051 is provided with a plurality of data lines connected to the source of the thin film transistor 406 For providing a pixel voltage to the source of the thin film transistor 406; a liquid crystal layer 403 between the first substrate 401 and the second substrate 402; a common electrode layer 404 located at the liquid crystal layer 403 and the second substrate 402 Between, package A plurality of electrode units (not labeled in the drawing) are included, and the electrode unit includes a first toothed electrode (not labeled in the drawing) and a second toothed electrode (not labeled in the drawing). A connecting wire connected to the first toothed electrode and the second toothed electrode is disposed in the data line layer 4051. The capacitive touch display device further includes the insulating layer 409 between the common electrode layer 404 and the data line layer 4051 for insulating the common electrode layer 404 from the conductive layer data line layer 4051. The connecting wires located in the data line layer 4051 are electrically connected to the first and second toothed electrodes in the common electrode layer 404 through the through holes 409 penetrating the insulating layer 409. In this embodiment, the connecting wires are located in the same layer as the data lines in the data line layer 4051. Compared with the embodiment shown in FIG. 14 and FIG. 16, a conductive layer can be reduced, thereby reducing the thickness of the capacitive touch display device. . Moreover, the connecting wire can be formed in the same process as the data line, and can also be formed into a process. It should be noted that since the data line in the data line layer 4051 is usually made of a metal material, the connection wire corresponds to the position of the black matrix 4071 in the color filter 407 in order to prevent the aperture ratio from decreasing. That is, in the light transmission direction, the connecting wires coincide with the black matrix 4071. Referring to Fig. 18, there is shown a schematic view of a sixth embodiment of the capacitive touch display device of the present invention. This embodiment still takes an FFS type display device as an example. The difference between the embodiment and the embodiment shown in FIG. 17 is not mentioned. The difference between the embodiment and the embodiment shown in FIG. 17 is that the capacitive touch display device includes: a thin film transistor on the second substrate 502. 506, and a control line layer 5052 and a data line layer 5051 which are sequentially located on the thin film transistor 506. The common electrode layer 504 is disposed on the liquid crystal layer 503 and the data line layer 5051, and the connection wires are disposed in the control line layer 5052. An insulating layer 508 is disposed between the control line layer 5052 and the common electrode layer 504, and the connecting wire passes through the through hole 509 penetrating the insulating layer 508 and the first toothed electrode and the second toothed electrode in the common electrode layer 504. Realize electrical connections. Since the gate lines in the control line layer 5052 are usually made of a metal material, the connection wires correspond to the positions of the black matrix 5071 in the color filter 507 in order to prevent a decrease in the aperture ratio. That is to say, in the direction of light transmission, the connecting wires coincide with the black matrix 5071. The above embodiment is described by taking an FFS type display device as an example. However, the present invention is not limited thereto, and the capacitive touch display device of the present invention may also be a Twisted Nematic (TN) type display device. Referring to Figure 19, a schematic view of a seventh embodiment of the present invention is shown. It should be noted that, in order to make the drawing clearer and clearer, only the main components of the capacitive touch display device are illustrated in the drawings, and components such as an insulating layer between the thin film transistor and the pixel electrode are omitted. Limit the invention. The capacitive touch display device of the present embodiment is a TN type display device, and includes: a first substrate 601 serving as a glass substrate on the side of the color filter 607. The second substrate 602 functions as a glass substrate on the thin film transistor side, and the second substrate 602 is disposed opposite to the first substrate 601. a thin film transistor 606 on the second substrate 602; a pixel electrode 605 on the thin film transistor 606; a liquid crystal layer 603 between the pixel electrode 605 and the second substrate 602; a common electrode layer 604 located at the Between the liquid crystal layer 603 and the color filter 607, comprising a plurality of electrode units arranged in a matrix, the electrode unit comprising a first toothed electrode and a second toothed electrode disposed opposite to each other, the first toothed shape The electrode and the second toothed electrode function as a touch sensing electrode in the touch sensing phase and as a common electrode in the display phase. In this embodiment, a connecting wire is disposed in the common electrode layer 604 for electrically connecting the first toothed electrode or the second toothed electrode to the display touch chip. The connecting wires may be the same transparent conductive material as the first toothed electrode or the second toothed electrode in the common electrode layer 604, such as indium tin oxide or graphene. Referring to Figure 20, there is shown a schematic diagram of an eighth embodiment of a capacitive touch display device of the present invention. The capacitive touch display device of this embodiment is still a TN type display device. The difference between this embodiment and the seventh embodiment is not mentioned. The difference between this embodiment and the seventh embodiment is that: a common conductive layer 710 is disposed between the common electrode layer 704 and the liquid crystal layer 703; An insulating layer 708 is disposed between the layer 710 and the common electrode layer 704; a connecting wire is disposed in the conductive layer 710, and the connecting wire passes through the through hole 709 penetrating the insulating layer 708 and the common electrode layer 704. The first toothed electrode or the second toothed electrode is electrically connected. In this embodiment, the connecting wires and the common electrode layer 704 are respectively located in different layers. The connecting wires may be of the same transparent conductive material as the first toothed electrode or the second toothed electrode of the common electrode layer 704, such as indium tin oxide or graphene. An opaque conductive material such as a metal material can also be used. When the connecting wire is made of an opaque conductive material, the position of the connecting wire corresponds to the position of the black matrix 7071 in the color filter 707 to avoid blocking of light and to reduce the aperture ratio. In the above embodiment, the capacitive touch display device is provided with a common electrode layer, and the common electrode layer includes a plurality of electrode units, and the electrode unit includes opposite first and second toothed electrodes. The invention is not limited thereto. Accordingly, in order to solve the problems of the prior art, the present invention further provides a capacitive touch display device, which is provided with a common electrode layer between the first substrate and the second substrate, and the common electrode layer includes one dimension A plurality of electrodes arranged in a matrix, the plurality of electrodes being used as a touch sensing electrode in the sensing phase and serving as a common electrode in the display phase. Referring to Figure 21, there is shown a schematic diagram of a ninth embodiment of a capacitive touch display device of the present invention. The capacitive touch display device includes: a common electrode layer 804, wherein the common electrode layer is provided with a plurality of electrodes S1, S2, S3, ..., Sn-1, Sn, Sn+1, ... arranged in a matrix of a single row. .. , where η is an integer greater than or equal to 2. In this embodiment, the plurality of electrodes SI, S2, S3, ..., Sn-1, Sn, and Sn+1 are rectangular. The single-row matrix of the plurality of electrodes arranged in the single-row matrix can realize touch coordinate detection and gesture recognition in the row direction (X-axis) direction, thereby implementing touch sensing; the plurality of electrodes S1, S2, S3 ... Sn -1 , Sn, Sn+1 are also used as a common electrode at the time of display. Specifically, when the touch occurs, when the touch display chip detects that the amount of change in the self-capacitance on the Sn electrode is the largest, the change amount of the capacitance is represented by Dn, and the changes in the adjacent electrodes Sn-1 and Sn+1 of the Sn electrode are respectively For Dn-1 and Dn+1, where X0 represents the length of the rectangular electrode in the X-axis direction, the coordinates of the touch position are:

Thereby, the detection of the touch-sensitive touch position is realized. It should be noted that the shape of the electrode in this embodiment is rectangular (including square and rectangular). However, the shape of the electrode is not limited in the present invention, and in other embodiments, the electrode shape may be circular or elliptical. It should be noted that FIG. 21 is an example of a one-dimensional matrix in the row direction. However, the present invention does not limit this. In other embodiments, the plurality of electrodes in the common electrode layer may also be arranged in a single column matrix. That is, the plurality of electrodes are arranged in a one-dimensional matrix in the column direction. The plurality of electrode single row matrices arranged in the single column matrix can realize touch coordinate detection and gesture recognition in the column direction (Υ axis) direction. Similar to the capacitive touch display device including the toothed electrode, the capacitive touch display device having a plurality of electrodes arranged in a one-dimensional matrix includes: a display touch chip electrically connected to each electrode for time sharing Trigger touch sensing The segment and display phases are also used to detect the change in capacitance of each electrode in the touch sensing phase, and the common electrode voltage is applied to each electrode in the display phase. The display touch chip may include: a touch control circuit configured to respectively detect a change in capacitance of each electrode during touch sensing; a display control circuit configured to load a common electrode voltage to each electrode during display; the touch control circuit and The display control circuit is configured to be coupled by a communication device, and the touch control circuit is configured to notify the display control circuit to display by the communication device after the touch sensing ends, and the display control circuit is configured to pass after the display ends The communication device notifies the touch control circuit to perform touch sensing. Alternatively, the display touch chip includes: a touch control circuit for respectively detecting a change in capacitance of each electrode; a display control circuit for loading a common electrode voltage to each electrode; a main control circuit, and the touch control circuit and the The display control circuit is coupled to trigger the touch control circuit and the display control circuit in a time-sharing manner. Specifically, the display touch chip further includes: a plurality of first switches located between the electrodes and the touch control circuit, wherein the capacitive touch display device performs touch sensing when the first switch is in communication; The second switch is located between each electrode and the display control circuit, and the capacitive touch display device performs display when the second switch is in communication. The capacitive touch display device may further include: a connecting wire located in a plurality of electrode peripheral regions of the one-dimensional matrix arrangement for realizing electrical connection between the electrode and the display touch chip. The connecting wire may be disposed on the common electrode layer. Alternatively, the connecting wire may be located in a different layer from the common electrode layer, and the connecting wire is electrically connected to the electrode through the through hole. Here, the through hole may correspond to the position of the electrode. In the direction of light transmission, the through hole coincides with the electrode, that is, the projection of the through hole in the plane of the electrode falls into the region where the electrode is located. The material of the connecting wire may be an opaque conductive material, and the connecting wire corresponds to a position of a non-light transmitting region in the capacitive touch display device. Specifically, the connecting wires correspond to the positions of the black matrix, that is, coincide with the black matrix in the light transmitting direction to avoid reducing the aperture ratio. The capacitive touch display device may be an FFS type display device; a thin film transistor and a pixel electrode are sequentially disposed on the second substrate; and the common electrode layer is located between the liquid crystal layer and the pixel electrode. In the FFS type display device, the connection wires are disposed in the common electrode layer. Or a conductive layer is disposed between the common electrode layer and the liquid crystal layer or between the common electrode layer and the pixel electrode, and an insulating layer is disposed between the conductive layer and the common electrode layer; A connecting wire is disposed in the conductive layer, and the connecting wire is electrically connected to an electrode in the common electrode layer through a through hole penetrating the insulating layer. In the FFS type display device, the control line layer and the data line layer are sequentially disposed on the second substrate; the connection wire is located in the control line layer, and the common electrode layer and the control line layer An insulating layer is provided, and the connecting wires are electrically connected to the electrodes in the common electrode layer through the through holes penetrating the insulating layer. Or the connecting wire is located in the data line layer, and an insulating layer is disposed between the common electrode layer and the data line layer, and the connecting wire passes through a through hole penetrating the insulating layer and a common electrode layer The electrodes are electrically connected. The capacitive touch display device may be a TN type display device; a color filter layer is further disposed between the first substrate and the common electrode layer; the common electrode layer is located Between the liquid crystal layer and the color filter layer. In the TN type display device, the connection wires are disposed in the common electrode layer. Or a conductive layer is disposed between the common electrode layer and the liquid crystal layer, and an insulating layer is disposed between the conductive layer and the common electrode layer; the connecting wire is disposed in the conductive layer, The connecting wires are electrically connected to the electrodes in the common electrode layer through the through holes penetrating the insulating layer. When the connecting wires are in the same layer as the common electrode layer, a transparent conductive material such as indium tin oxide or graphene may be used. If the connecting wire and the common electrode are different layers, the connecting wire may be a transparent conductive material such as indium tin oxide or graphene, or an opaque conductive material such as metal. When a metal material is used, the connecting wires and the black matrix overlap with the black matrix in the direction of light transmission to avoid the problem that the aperture ratio caused by light blocking is reduced. It should be noted that a capacitive touch display device having a plurality of electrodes arranged in a one-dimensional matrix has the same features as a capacitive touch display device of a toothed electrode. Please refer to the capacitive touch display device of the toothed electrode. The description is not repeated here. Although the present invention has been disclosed above, the present invention is not limited thereto. Any changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be determined by the scope defined by the appended claims.

Claims

Rights request

1. A capacitive touch display device for realizing touch sensing and display, characterized in that it includes: a first substrate; a second substrate arranged opposite to the first substrate; a liquid crystal layer located on the first substrate and the second substrate; a common electrode layer, located between the first substrate and the second substrate, the common electrode layer includes a plurality of electrode units arranged in a matrix, the electrode units include oppositely arranged first The first tooth-shaped electrode and the second tooth-shaped electrode are used as touch-sensing electrodes in the touch-sensing stage and as common electrodes in the display stage.

2. The capacitive touch display device according to claim 1, wherein the plurality of electrode units are arranged in a single row and multiple columns matrix, a two rows and multiple columns matrix arrangement, or a multiple rows and multiple columns matrix arrangement. cloth, the teeth of the first toothed electrode and the second toothed electrode extend along the column direction.

3. The capacitive touch display device according to claim 1, wherein the plurality of electrode units are arranged in a single column and multi-row matrix, a two-column and multi-row matrix, or a multi-column and multi-row matrix. cloth, the teeth of the first toothed electrode and the second toothed electrode extend along the row direction.

4. The capacitive touch display device according to claim 1, wherein the first tooth-shaped electrode and the second tooth-shaped electrode have a single-tooth structure or a multi-tooth structure.

5. The capacitive touch display device according to claim 1, wherein the teeth of the first toothed electrode and the second toothed electrode are triangular or trapezoidal.

6. The capacitive touch display device according to claim 1, wherein the electrode unit includes one or more first tooth-shaped electrodes and one or more second tooth-shaped electrodes.

7. The capacitive touch display device according to claim 1, characterized in that: different electrical The pole units have the same number of tooth profiles or a different number of tooth profiles.

8. The capacitive touch display device according to claim 1, wherein the shapes of the toothed electrodes in the same electrode unit are the same or different.

9. The capacitive touch display device according to claim 1, wherein the shapes of the toothed electrodes in different electrode units are the same or different.

10. The capacitive touch display device according to claim 1, wherein the common electrode layer has a single-layer structure, or the common electrode layer has a multi-layer structure that is electrically connected to each other.

11. The capacitive touch display device according to claim 1, further comprising: a display touch chip, electrically connected to the first tooth-shaped electrode and the second tooth-shaped electrode of each electrode unit respectively, for dividing When the device is driven, the capacitance changes of the first tooth-shaped electrode and the second tooth-shaped electrode in each electrode unit are respectively detected during the touch sensing stage, and the first tooth-shaped electrode and the second tooth-shaped electrode in each electrode unit are detected during the display stage. Both are loaded with a common electrode voltage and drive the display pixel electrode.

12. The capacitive touch display device according to claim 11, wherein the display touch chip is configured to detect the self-capacitance of the first toothed electrode and the second toothed electrode in each electrode unit.

13. The capacitive touch display device according to claim 11, wherein the display touch chip includes: a touch control circuit, configured to respectively detect the first tooth-shaped electrode and the third tooth-shaped electrode in each electrode unit during touch sensing. The capacitance change of the two toothed electrodes; the display control circuit, used to load the common electrode voltage to the first toothed electrode and the second toothed electrode in each electrode unit during display and drive the display pixel electrode; the touch control circuit and the The display control circuit is coupled through a communication device, and the touch control circuit is used to notify all users through the communication device after the touch sensing is completed. The display control circuit performs display, and the display control circuit is used to notify the touch control circuit to perform touch sensing through the communication device after the display is completed.

14. The capacitive touch display device according to claim 13, wherein the plurality of electrode units are arranged in a matrix of two columns and multiple rows, and the touch control circuit includes: a first touch control circuit, for During touch sensing, the capacitance changes of the first tooth-shaped electrode and the second tooth-shaped electrode in each electrode unit of the first column are respectively detected; the second touch control circuit is used to detect the capacitance changes of the first tooth-shaped electrode and the second tooth-shaped electrode in each electrode unit of the second column during touch sensing. The capacitance changes of a toothed electrode and a second toothed electrode; the first touch control circuit and the second touch control circuit are respectively located on both sides of the display control circuit.

15. The capacitive touch display device of claim 11, wherein the display touch chip includes: a touch control circuit for detecting the first toothed electrode and the second toothed electrode in each electrode unit respectively. capacitance change; display control circuit, used to load the common electrode voltage to the first tooth-shaped electrode and the second tooth-shaped electrode in each electrode unit and drive the display pixel electrode; main control circuit, with the touch control circuit and the display The control circuit is coupled and used to trigger the touch control circuit and the display control circuit in a time-sharing manner.

16. The capacitive touch display device according to any one of claims 11 to 15, wherein the display touch chip further includes: a plurality of first switches located on the first toothed electrode or the second toothed electrode. between the first toothed electrode and the touch control circuit, the capacitive touch display device performs touch sensing when the first switch is connected; a plurality of second switches located between the first toothed electrode or the second toothed electrode and the Between the display control circuits, when the second switch is connected, the capacitive touch display device displays

17. The capacitive touch display device according to claim 11, further comprising: a connecting wire for electrically connecting the first toothed electrode or the second toothed electrode to the display touch chip.

18. The capacitive touch display device according to claim 17, wherein the connecting wire and the common electrode layer are located on the same layer.

19. The capacitive touch display device according to claim 17, wherein the connecting wire and the common electrode layer are located on different layers, and the connecting wire is connected to the first toothed electrode or the third toothed electrode through a through hole. The two-tooth-shaped electrode realizes the electrical connection.

20. The capacitive touch display device according to claim 19, wherein the through hole corresponds to the position of the first toothed electrode or the second toothed electrode.

21. The capacitive touch display device according to claim 19, wherein the connecting wire is made of an opaque conductive material, and the connecting wire is aligned with the position of the non-transparent area in the capacitive touch display device. correspond.

22. The capacitive touch display device according to claim 21, wherein the connecting wire corresponds to the position of the black matrix.

23. The capacitive touch display device according to claim 17, wherein the capacitive touch display device is an FFS type display device; thin film transistors and pixel electrodes are sequentially provided on the second substrate; the common An electrode layer is located between the liquid crystal layer and the pixel electrode.

24. The capacitive touch display device according to claim 23, wherein the connection wire is provided in the common electrode layer.

25. The capacitive touch display device according to claim 23, wherein: between the common electrode layer and the liquid crystal layer or between the common electrode layer and the pixel A conductive layer is provided between the electrodes, and an insulating layer is provided between the conductive layer and the common electrode layer.

The connecting wire is disposed in the conductive layer, and is electrically connected to the first toothed electrode or the second toothed electrode in the common electrode layer through a through hole that penetrates the insulating layer.

26. The capacitive touch display device according to claim 23, further comprising a control line layer and a data line layer located on the second substrate in sequence; the connecting wire is located on the control line layer, so An insulating layer is provided between the common electrode layer and the control line layer, and the connecting wire is electrically connected to the first toothed electrode or the second toothed electrode in the common electrode layer through a through hole penetrating the insulating layer. .

27. The capacitive touch display device according to claim 23, further comprising a control line layer and a data line layer located on the second substrate in sequence; the connecting wire is located on the data line layer, so An insulating layer is provided between the common electrode layer and the data line layer, and the connecting wire is electrically connected to the first toothed electrode or the second toothed electrode in the common electrode layer through a through hole penetrating the insulating layer. .

28. The capacitive touch display device according to claim 17, wherein the capacitive touch display device is a TN display device; a color filter is further provided between the first substrate and the common electrode layer. Light sheet layer; The common electrode layer is located between the liquid crystal layer and the color filter layer.

29. The capacitive touch display device according to claim 28, wherein the connection wire is provided in the common electrode layer.

30. The capacitive touch display device according to claim 28, wherein a conductive layer is provided between the common electrode layer and the liquid crystal layer, and a conductive layer is provided between the conductive layer and the common electrode layer. Insulation; The connecting wire is disposed in the conductive layer, and is electrically connected to the first toothed electrode or the second toothed electrode in the common electrode layer through a through hole that penetrates the insulating layer.

31. The capacitive touch display device of claim 1, wherein the common electrode layer is made of indium tin oxide or graphene.

32. The capacitive touch display device according to claim 17, wherein the material of the connecting wire is indium tin oxide, graphene or metal.

33. A capacitive touch display device, used to realize touch sensing and display, characterized in that it includes: a first substrate; a second substrate, arranged opposite to the first substrate; a liquid crystal layer, located on the first substrate and the second substrate; a common electrode layer, located between the first substrate and the second substrate, the common electrode layer includes a plurality of electrodes arranged in a one-dimensional matrix, the plurality of electrodes are used in the sensing stage As a touch sensing electrode, it is used as a common electrode in the display stage.

34. The capacitive touch display device according to claim 33, wherein the electrode shape is a regular polygon, a strip, a circle or an ellipse.

35. The capacitive touch display device according to claim 33, further comprising: a display touch chip, electrically connected to each electrode respectively, for triggering the touch sensing stage and the display stage in a time-sharing manner, and also for triggering the touch sensing stage and the display stage in a time-sharing manner. In the touch sensing stage, the capacitance changes of each electrode are detected respectively, and in the display stage, the common electrode voltage is applied to each electrode.

36. The capacitive touch display device according to claim 35, wherein the display touch chip is configured to detect the self-capacitance of each electrode.

37. The capacitive touch display device according to claim 35, characterized in that: the display The display touch chip includes: a touch control circuit, used to detect capacitance changes of each electrode respectively during touch sensing; a display control circuit, used to load a common electrode voltage to each electrode during display; the touch control circuit and the display The control circuit is coupled through a communication device. The touch control circuit is used to notify the display control circuit to perform display through the communication device after the touch sensing is completed. The display control circuit is used to perform display through the communication after the display is completed. The device notifies the touch control circuit to perform touch sensing.

38. The capacitive touch display device according to claim 35, wherein the display touch chip includes: a touch control circuit for detecting capacitance changes of each electrode respectively; a display control circuit for detecting capacitance changes of each electrode; Load the common electrode voltage; a main control circuit, coupled to the touch control circuit and the display control circuit, for triggering the touch control circuit and the display control circuit in a time-sharing manner.

39. The capacitive touch display device according to any one of claims 35 to 38, wherein the display touch chip further includes: a plurality of first switches located between each electrode and the touch control circuit. time, the capacitive touch display device performs touch sensing when the first switch is connected; a plurality of second switches are located between each electrode and the display control circuit, and the capacitive touch display device performs touch sensing when the second switch is connected The display device displays.

40. The capacitive touch display device according to claim 35, further comprising: connecting wires located in the peripheral areas of a plurality of electrodes arranged in a one-dimensional matrix for realizing electrical connection between the electrodes and the display touch chip. connect.

41. The capacitive touch display device according to claim 40, wherein the connection wire is provided on the common electrode layer.

42. The capacitive touch display device according to claim 40, wherein the connecting wire and the common electrode layer are located on different layers, and the connecting wire is electrically connected to the electrode through a through hole.

43. The capacitive touch display device according to claim 42, wherein the through hole corresponds to the position of the electrode.

44. The capacitive touch display device according to claim 42, wherein the connecting wire is made of an opaque conductive material, and the connecting wire is aligned with the position of the non-transparent area in the capacitive touch display device. correspond.

45. The capacitive touch display device according to claim 44, wherein the connecting wire corresponds to the position of the black matrix.

46. The capacitive touch display device according to claim 40, wherein the capacitive touch display device is an FFS type display device; thin film transistors and pixel electrodes are sequentially provided on the second substrate; the common An electrode layer is located between the liquid crystal layer and the pixel electrode.

47. The capacitive touch display device according to claim 46, wherein the connection wire is provided in the common electrode layer.

48. The capacitive touch display device according to claim 46, wherein a conductive layer is provided between the common electrode layer and the liquid crystal layer or between the common electrode layer and the pixel electrode, the An insulating layer is provided between the conductive layer and the common electrode layer; the connecting wire is provided in the conductive layer, and the connecting wire is electrically connected to the electrode in the common electrode layer through a through hole penetrating the insulating layer .

49. The capacitive touch display device according to claim 46, further comprising a control line layer and a data line layer located on the second substrate in sequence; The connecting wire is located on the control line layer, and an insulating layer is provided between the common electrode layer and the control line layer. The connecting wire is realized by a through hole penetrating the insulating layer and an electrode in the common electrode layer. Electrical connection.

50. The capacitive touch display device according to claim 46, further comprising a control line layer and a data line layer located on the second substrate in sequence; the connecting wire is located on the data line layer, so An insulating layer is provided between the common electrode layer and the data line layer, and the connecting wire is electrically connected to the electrode in the common electrode layer through a through hole penetrating the insulating layer.

51. The capacitive touch display device according to claim 40, wherein the capacitive touch display device is a TN display device; a color filter is further provided between the first substrate and the common electrode layer. Light sheet layer; The common electrode layer is located between the liquid crystal layer and the color filter layer.

52. The capacitive touch display device according to claim 51, wherein the connection wire is provided in the common electrode layer.

53. The capacitive touch display device according to claim 51, wherein a conductive layer is provided between the common electrode layer and the liquid crystal layer, and a conductive layer is provided between the conductive layer and the common electrode layer. Insulating layer; The connecting wire is provided in the conductive layer, and the connecting wire is electrically connected to the electrode in the common electrode layer through a through hole that penetrates the insulating layer.

54. The capacitive touch display device according to claim 33, wherein the common electrode layer is made of indium tin oxide or graphene.

55. The capacitive touch display device according to claim 40, wherein the material of the connecting wire is indium tin oxide, graphene or metal.

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