JP2016192227A - Touch screen panel-integrated display panel and integrated circuit for driving the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch screen panel-integrated display device and a driving method of the same, capable of preventing generation of parasitic capacitance that tends to reduce touch sensing accuracy.SOLUTION: A touch screen panel-integrated display device comprises; a panel having a plurality of data lines formed in a first direction, a plurality of gate lines formed in a second direction, and a plurality of formed electrodes grouped into a plurality of electrode groups; a touch integrated circuit which applies a touch drive signal to the whole or a part of the plurality of electrodes when a driving mode is a touch driving mode; a data drive unit which supplies data voltage to the plurality of data lines when the driving mode is a display driving mode; and a gate driver unit which sequentially supplies a scan signal to the plurality of gate lines while the driving mode is the display driving mode. The touch drive signal or a signal corresponding to the touch drive signal is applied to the whole or a part of the plurality of gate lines while the driving mode is the touch driving mode.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a touch screen panel integrated display panel and an integrated circuit for driving the display panel.

  With the development of the information society, demands for display devices for displaying images have increased in various forms. In recent years, liquid crystal display devices (LCDs) and plasma display devices (PDPs) have been increasing. Various display devices such as organic light emitting display devices (OLED) have been used.

  For such display devices, a touch-based input method is provided that allows users to input information or commands intuitively and conveniently from the usual input methods such as buttons, keyboards, and mice. Has been.

  In order to provide such a touch-based input method, it is necessary to be able to accurately detect touch coordinates by grasping the presence or absence of a user's touch.

  Therefore, conventionally, touch sensing has been realized by adopting any one of various touch methods such as a resistive film method, a capacitance method, an electromagnetic induction method, an infrared method, and an ultrasonic method.

  Among these various touch methods, the capacitance between the touch electrodes or the pointers such as the finger and the finger via a large number of touch electrodes (eg, horizontal electrodes, vertical electrodes) formed on the touch screen panel. Many capacitance touch systems that detect the presence / absence of a touch and touch coordinates based on the change in capacitance during the period are employed.

JP 2014-115613 A

  In the case of such a capacitance touch method, in addition to the capacitance necessary for touch sensing, an unnecessary parasitic capacitance is formed by other voltage lines or electrodes around the touch electrode.

  The parasitic capacitance formed unnecessarily in this way causes problems such as an increase in touch driving load (Load) and a decrease in the accuracy of touch sensing, or, in severe cases, that touch sensing itself becomes impossible. Bring.

  The problem due to such unnecessary parasitic capacitance occurs more seriously in a medium-sized or larger display.

  In addition, problems due to such unnecessary parasitic capacitance frequently occur in a display device integrated with a touch screen panel in which a touch screen panel (TSP: Touch Screen Panel) is built in the display panel. Therefore, it becomes a factor that makes it impossible to realize an in-cell type touch screen panel having a medium or large size.

  From such a background, the object of the present invention is to prevent the formation of parasitic capacitance that may increase the touch drive load and reduce the accuracy of touch sensing or make touch sensing itself impossible. A display panel integrated display panel and an integrated circuit thereof are provided.

  Another object of the present invention is to provide a display screen integrated with a touch screen panel of medium or large size, which could not be realized by a parasitic capacitance.

  In one aspect of the present invention, the present embodiment is formed along the first direction, and is formed along the second direction with a plurality of data lines supplying a data voltage when in the display driving mode. A touch screen including a plurality of gate lines that sequentially supply a scan signal when in the mode and a plurality of electrodes that are grouped into a plurality of electrode groups and to which the touch drive signal is applied when in the touch drive mode A panel-integrated display panel can be provided.

  In such a touch screen panel integrated display panel, when a touch drive signal is applied to all or a part of the plurality of electrodes in the touch drive mode, the touch drive signal or a signal corresponding to the touch drive signal is a plurality of gates. It can be applied to all or part of the line.

  In the touch screen panel integrated display panel, when a touch drive signal or a signal corresponding to the touch drive signal is applied to a part of the plurality of gate lines, the touch sensing electrode group is selected from the plurality of electrode groups. A touch driving signal or a signal corresponding to the touch driving signal is applied to at least one gate line corresponding to one electrode group, and one of the plurality of electrode groups is selected as the touch sensing electrode group. The touch drive signal or a signal corresponding to the touch drive signal can be further applied to at least one gate line corresponding to the adjacent electrode group.

  The touch drive signal or the signal corresponding to the touch drive signal may be a signal offset by a specific voltage value with a specific voltage.

  The specific voltage may be a turn-off voltage level of a scan signal.

  The signal corresponding to the touch drive signal may be a signal having the same phase as the touch drive signal.

  The signal corresponding to the touch drive signal may be a signal having the same magnitude as the touch drive signal.

  In another aspect of the present invention, the present embodiment is formed along the second direction and a plurality of data lines that are formed along the first direction and supply a data voltage in the display driving mode. A plurality of gate lines that sequentially supply scan signals when in the display driving mode, and a plurality of electrodes that are grouped into a plurality of electrode groups and to which the touch driving signal is applied when in the touch driving mode. A touch screen panel integrated display panel can be provided.

  In such a touch screen panel integrated display panel, when a touch drive signal is applied to all or a part of the plurality of electrodes in the touch drive mode, the touch drive signal or a signal corresponding to the touch drive signal is a plurality of gates. It can be applied to all or part of the line.

  In the touch screen panel integrated display panel, when a touch drive signal or a signal corresponding to the touch drive signal is applied to a part of the plurality of gate lines, the touch sensing electrode group is selected from the plurality of electrodes. A touch driving signal or a signal corresponding to the touch driving signal is applied to at least one gate line corresponding to one electrode group, and the touch driving signal or a signal corresponding to the touch driving signal is further applied to the plurality of data lines. It can be applied.

  The signal corresponding to the touch drive signal may be a signal having the same phase as the touch drive signal.

  The signal corresponding to the touch drive signal may be a signal having the same magnitude as the touch drive signal.

  In still another aspect, the present embodiment is formed along the first direction and is formed along the second direction with a plurality of data lines supplying a data voltage when in the display driving mode. A touch screen panel including a plurality of gate lines for sequentially supplying a scan signal in the case of a plurality of electrodes and a plurality of electrodes grouped in a plurality of electrode groups and applied with a touch drive signal in a touch drive mode. A body-type display panel can be provided.

  In such a touch screen panel integrated display panel, when a touch drive signal is applied to all or a part of the plurality of electrodes in the touch drive mode, the touch drive signal or a signal corresponding to the touch drive signal is a plurality of data. It can be applied to all or part of the line.

  In the touch screen panel integrated display panel, when a touch driving signal or a signal corresponding to the touch driving signal is applied to a part of the plurality of data lines, the touch sensing electrode group among the plurality of electrode groups. Touch drive signal or touch drive on at least one data line corresponding to one selected electrode group and at least one data line corresponding to one electrode group adjacent to one electrode group selected for touch sensing electrode group A signal corresponding to the signal can be applied.

  The signal corresponding to the touch drive signal may be a signal having the same phase as the touch drive signal.

  The signal corresponding to the touch drive signal may be a signal having the same magnitude as the touch drive signal.

  In still another aspect, the present embodiment is formed along the first direction and is formed along the second direction with a plurality of data lines supplying a data voltage when in the display driving mode. A touch screen panel including a plurality of gate lines for sequentially supplying a scan signal in the case of a plurality of electrodes and a plurality of electrodes grouped in a plurality of electrode groups and applied with a touch drive signal in a touch drive mode. A body-type display panel can be provided.

  In such a touch screen panel integrated display panel, when a touch drive signal is applied to all or a part of the plurality of electrodes in the touch drive mode, the touch drive signal or a signal corresponding to the touch drive signal is a plurality of gates. The touch driving signal or a signal corresponding to the touch driving signal can be further applied to all or a part of the plurality of data lines.

  In the touch panel panel-integrated display panel, when a touch drive signal or a signal corresponding to the touch drive signal is applied to a part of the plurality of data lines, the touch drive signal or touch is applied to the whole of the plurality of gate lines. A signal corresponding to the drive signal can be applied.

  The signal corresponding to the touch drive signal may be a signal having the same phase as the touch drive signal.

  The signal corresponding to the touch drive signal may be a signal having the same magnitude as the touch drive signal.

  In yet another aspect, the present embodiment drives a touch screen panel integrated display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of pixels are defined, and a plurality of common electrodes are arranged. An integrated circuit can be provided.

  Such an integrated circuit applies a common voltage to a plurality of common electrodes at a display driving timing, applies a touch driving signal to all or a part of the plurality of common electrodes at a touch driving timing, and outputs a plurality of gate lines. A touch driving signal or a signal corresponding to the touch driving signal can be further applied to the whole or a part.

  The integrated circuit has one electrode group selected as the touch sensing electrode group among the plurality of common electrodes when the touch drive signal or a signal corresponding to the touch drive signal is applied to a part of the plurality of gate lines. A touch driving signal or a signal corresponding to the touch driving signal is applied to at least one gate line corresponding to the touch line, and an electrode group adjacent to one electrode group selected as the touch sensing electrode group among the plurality of common electrodes. A touch drive signal or a signal corresponding to the touch drive signal can be applied to at least one corresponding gate line.

  In such an integrated circuit, the touch drive signal or the signal corresponding to the touch drive signal may be a signal offset by a certain voltage value with a specific voltage.

  The specific voltage may be a scan signal turn-off voltage.

  In still another aspect, an embodiment of the present invention drives a touch screen panel integrated display panel in which a plurality of data lines and a plurality of gate lines are formed to define a plurality of pixels and a plurality of common electrodes are arranged. An integrated circuit can be provided.

  Such an integrated circuit applies a common voltage to a plurality of common electrodes at a display drive timing, applies a touch drive signal to all or a part of the plurality of common electrodes at a touch drive timing, and A touch driving signal or a signal corresponding to the touch driving signal can be further applied to a part.

  The integrated circuit has one electrode group selected as the touch sensing electrode group among the plurality of common electrodes when the touch drive signal or a signal corresponding to the touch drive signal is applied to a part of the plurality of gate lines. A touch driving signal or a signal corresponding to the touch driving signal can be applied to at least one gate line corresponding to the touch line, and a touch driving signal or a signal corresponding to the touch driving signal can be applied to the entire data line. .

  The signal corresponding to the touch drive signal may be a signal having the same phase as the touch drive signal.

  Note that the signal corresponding to the touch drive signal may be a signal having the same magnitude as the touch drive signal.

   As described above, according to the present invention, a touch screen panel that prevents the formation of parasitic capacitance, which may increase the touch drive load and reduce the accuracy of touch sensing or make the touch sensing itself impossible. A body-type display panel and an integrated circuit thereof can be provided.

  In addition, according to the present invention, it is possible to provide a touch screen panel-integrated display panel having a medium or large size that could not be realized by a parasitic capacitance.

1 is a schematic view illustrating a touch screen panel integrated display device according to an embodiment of the present invention; FIG. 3 is a diagram illustrating a capacitance component generated in a display device with an integrated touch screen panel according to an exemplary embodiment of the present invention. 1 is a plan view illustrating a panel included in a display device integrated with a touch screen panel according to an embodiment of the present invention. 1 is a cross-sectional view illustrating a panel included in a display device integrated with a touch screen panel according to an embodiment of the present invention. FIG. 6 is another plan view showing a panel included in the touch screen panel integrated display device according to the embodiment of the present invention. FIG. 3 is an equivalent circuit diagram of a unit touch electrode region of a panel included in a touch screen panel integrated display device according to an embodiment of the present invention. It is a figure explaining the drive method of the touch screen panel integrated display apparatus by one Embodiment of this invention. FIG. 6 is an equivalent circuit diagram of a unit touch electrode region for explaining a method for supplying various voltages in the method for driving a display device with an integrated touch screen panel according to an embodiment of the present invention. FIG. 4 is a diagram illustrating a method of applying a touch drive signal to a touch electrode when performing touch sensing for each touch electrode array (vertical touch electrode group) in the touch screen panel integrated display device according to the embodiment of the present invention. . FIG. 4 is a diagram illustrating a method of applying a touch drive signal to a touch electrode when performing touch sensing for each touch electrode array (vertical touch electrode group) in the touch screen panel integrated display device according to the embodiment of the present invention. . FIG. 6 is a diagram illustrating a method for applying a touch drive signal to a touch electrode when performing touch sensing for each touch electrode row (lateral touch electrode group) in the touch screen panel integrated display device according to an embodiment of the present invention; . FIG. 6 is a diagram illustrating a method for applying a touch drive signal to a touch electrode when performing touch sensing for each touch electrode row (lateral touch electrode group) in the touch screen panel integrated display device according to an embodiment of the present invention; . 4 illustrates a method of applying a touch drive signal to a data line and a gate line when performing touch sensing for each touch electrode array (vertical touch electrode group) in a touch screen panel integrated display device according to an embodiment of the present invention; FIG. 4 illustrates a method of applying a touch drive signal to a data line and a gate line when performing touch sensing for each touch electrode array (vertical touch electrode group) in a touch screen panel integrated display device according to an embodiment of the present invention; FIG. 4 illustrates a method for applying a touch drive signal to a data line and a gate line when performing touch sensing for each touch electrode row (lateral touch electrode group) in a touch screen panel integrated display device according to an embodiment of the present invention; FIG. 4 illustrates a method for applying a touch drive signal to a data line and a gate line when performing touch sensing for each touch electrode row (lateral touch electrode group) in a touch screen panel integrated display device according to an embodiment of the present invention; FIG. FIG. 6 is a plan view showing a unit touch electrode region when each of a plurality of electrodes serving as touch electrodes has a comb-shaped pattern in the touch screen panel integrated display device according to the embodiment of the present invention. FIG. 6 is a cross-sectional view illustrating a unit touch electrode region in a case where each of a plurality of electrodes serving as touch electrodes is a pattern including a comb shape in the touch screen panel integrated display device according to the embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to exemplary drawings. In attaching reference numerals to the constituent elements in each drawing, the same constituent elements may be given the same reference numerals when displayed on other drawings. In describing the present invention, if it is determined that a specific description of a known configuration or function may obscure the gist of the present invention, detailed description thereof may be omitted.

  In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. Such terms are only for distinguishing the component from other components, and the essence, procedure or order of the component is not limited by the terms. When a component is described as being coupled, coupled or connected to another component, the component can be directly coupled, coupled or connected to another component, and other components between these components. It should also be understood that these components may be intervened, or that these components may be linked, coupled or connected via other components.

  FIG. 1 is a schematic view showing a touch screen panel integrated display device 100 according to an embodiment of the present invention.

  Referring to FIG. 1, a touch screen panel-integrated display device 100 according to an embodiment of the present invention includes a panel 110, a data driver 120, a gate driver 130, a touch integrated circuit 140, and the like.

  In the panel 110, a plurality of data lines DL are formed along a first direction (for example, a vertical direction or a horizontal direction), and a plurality of gate lines GL are formed along a second direction (for example, a horizontal direction or a vertical direction). A large number of pixels (P: Pixel) are defined corresponding to each of the intersections of the plurality of data lines DL and the plurality of gate lines GL.

  In such a pixel region of each pixel (P), a transistor having a source electrode or a drain electrode connected to the data line DL, a gate electrode connected to the gate line GL, and a drain electrode or source electrode connected to the pixel electrode. (Transistor) is formed.

  In addition, the panel 110 further includes a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 that are grouped into a plurality of electrode groups.

  The panel 110 serves as a display panel (Display Panel) and also serves as a touch screen panel (TSP: Touch Screen Panel).

  That is, the panel 110 may be a panel in which a display panel and a touch screen panel are combined together, or a display in which a touch screen panel (TSP: Touch Screen Panel) is built in an in-cell type. A panel may be sufficient.

  When the panel 110 serves as a display panel, the driving mode of the panel 110 is referred to as a display driving mode. When the panel 110 serves as a touch screen panel, the driving mode of the panel 110 is referred to as a touch driving mode.

  When the driving mode of the panel 110 is the display driving mode, the data driving unit 120 supplies the display data voltage (Vdata) to the plurality of data lines DL.

  When the driving mode of the panel 110 is the display driving mode, the gate driving unit 130 sequentially supplies a display scan signal (Scan Signal) to the plurality of gate lines GL.

  When the driving mode of the panel 110 is the touch driving mode, the touch integrated circuit 140 applies touch driving signals (all or part of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 directly connected through the signal lines). (Touch Driving Signal) is applied. Here, the touch drive signal is a touch sensing signal, a touch sensing voltage, or a touch driving voltage (Vtd: Touch Driving Voltage).

  For example, when the drive mode of the panel 110 is the touch drive mode, the touch integrated circuit 140 may include all or part of the plurality of electrode groups in which the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 are grouped. A touch drive signal is applied.

  Meanwhile, the touch screen panel integrated display device 100 according to an embodiment of the present invention may further include a timing controller (not shown) that controls driving timing of the data driver 120 and the gate driver 130. .

  In addition, the display device 100 with an integrated touch screen panel according to an exemplary embodiment of the present invention may include sensing performed by the touch integrated circuit 140 through a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as touch electrodes. It may further include a touch controller (not shown) that receives data (eg, capacitance, change in capacitance, voltage, etc.) and detects the presence or absence of touch and touch coordinates.

  Meanwhile, the panel 110 of the touch screen panel integrated display device 100 according to an embodiment of the present invention is driven while repeating the display driving mode and the touch driving mode, and the timing of the display driving mode and the touch driving mode is the timing. Control can be performed by a control signal output from a controller, a touch controller, or the like, and in some cases, control can be performed by interlocking the timing controller and the touch controller.

  Meanwhile, the touch screen panel integrated display device 100 according to an embodiment of the present invention uses a plurality of touch electrodes (eg, horizontal electrodes, vertical electrodes) formed on the touch screen panel as a touch method. A capacitance touch method is employed in which presence / absence of touch and touch coordinates are detected based on the measured change in capacitance.

  Such a capacitance touch method is classified into, for example, a mutual capacitance touch method and a self-capacitance touch method.

  In the mutual capacitance touch method, which is a type of capacitance touch method, one of the horizontal electrode and the vertical electrode serves as a Tx electrode (also referred to as a drive electrode) to which a drive voltage is applied. The direction electrode becomes a Rx electrode (also called a sensing electrode) that forms a capacitance with the Tx electrode by sensing the drive voltage, and the capacitance (mutual capacitance) between the Tx electrode and the Rx electrode depending on the presence or absence of a pointer such as a finger or a pen This is a touch method for detecting presence / absence of touch, touch coordinates, and the like based on the change of.

  The self-capacitance touch method, which is another type of the capacitance touch method, forms a capacitance (self-capacitance) with each touch electrode and a pointer such as a finger or a pen. , And the presence or absence of touch and the touch coordinates are detected based on the measured capacitance value. Unlike the mutual capacitance touch method, the self-capacitance touch method is sensed at the same time as a drive voltage (touch drive signal) is applied through each touch electrode. Therefore, in the self-capacitance touch method, there is no distinction between the Tx electrode and the Rx electrode.

  The touch screen panel-integrated display device 100 according to an embodiment of the present invention may employ any one of the two capacitance touch methods (the mutual capacitance touch method and the self-capacitance touch method) described above. However, in this specification, the embodiment will be described on the assumption that the self-capacitance touch method is adopted for convenience of explanation.

  The data driver 120 described above may include at least one data driver integrated circuit (also referred to as a data driver IC or a source driver integrated circuit), and the at least one data driver integrated circuit may include a tape automatic bonding (TAB). : It may be connected to a bonding pad (Bonding Pad) of the panel 110 by a Tape Automated Bonding (COG) method or a chip-on-glass (COG) method, or may be directly formed on the panel 110, or in some cases. May be integrated with the panel 110.

  The gate driver 130 described above may be arranged only on one side of the panel 110 as shown in FIG. 1 according to the driving method, or may be arranged on both sides of the panel 110 in two.

  The gate driver 130 may include at least one gate driver integrated circuit (Gate Driver IC), and the at least one gate driver integrated circuit may include a tape automatic bonding (TAB) method or a chip-on-glass (chip-on-glass). It may be connected to a bonding pad of the panel 110 by a COG method, or may be directly formed on the panel 110 by being embodied in a gate-in-panel (GIP) type. It may be formed in an integrated manner.

  As shown in FIG. 1, the touch integrated circuit 140 may be external to the data driver 120 and the gate driver 130 as a separate configuration from the data driver 120 and the gate driver 130. The data driver 120 may be implemented as an internal configuration of another separate driver IC (eg, display driver IC) that may include at least one of the data driver 120 and the gate driver 130 according to the configuration method. 120 or the internal configuration of the gate driver 130 may be realized.

  Accordingly, in the touch drive mode, when the touch integrated circuit 140 applies a touch drive signal to all or a part of the plurality of electrodes that serve as touch electrodes, a separate driver IC including the touch integrated circuit 140 may have the touch electrode. It is also conceivable to apply a touch drive signal to all or a part of the plurality of electrodes that play a role. Depending on the design method, the data driver 120 or the gate driver 130 including the touch integrated circuit 140 may serve as a touch electrode. It is also conceivable to apply a touch drive signal to all or part of the electrodes.

  The present invention is not limited to the implementation and design method of the touch integrated circuit 140, and may be any different configuration as long as only the execution function described in the present specification is the same or similar, or the internal or external configuration. It may be.

  Further, although the touch integrated circuit 140 is shown as one circuit in FIG. 1, it may be embodied as two or more circuits.

  Meanwhile, in order for the touch integrated circuit 140 to apply a touch drive signal to all or a part of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34, the plurality of electrodes S11 to S14 and S21 to S24. , S31 to S34, a separate signal line configuration is required.

  At least one signal line that is connected to each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 and transmits a touch drive signal or a common voltage has a first direction (vertical direction) or a second direction (horizontal direction). The panel 110 can be formed along the line.

  As an example, at least one signal line connected to each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 may prevent the aperture ratio from decreasing. It can be formed in the region of the second substrate (lower substrate, TFT array substrate) of the panel 110 facing the black matrix region formed on the color filter substrate.

  When two or more signal lines are connected to each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34, the resistance can be reduced.

  On the other hand, the direction in which at least one signal line connected to each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 is formed includes the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34. Depending on whether sensing is done by grouping along the first direction (vertical direction) in which the data line is formed, or sensing is performed by grouping along the second direction (lateral direction) in which the gate line is formed There is also sex.

  Referring to FIG. 3, when sensing a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 grouped along a first direction (longitudinal direction) in which a data line is formed, a plurality of electrodes S11 are used. To S14, S21 to S24, and S31 to S34 can be formed along a first direction (vertical direction) in which the data lines are formed.

  When the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 are grouped and sensed along the second direction (lateral direction) in which the gate lines are formed, the plurality of electrodes S11 to S14, S21 to S24, S31 are used. To S34 can be formed along the second direction (lateral direction) in which the data lines are formed (see FIG. 5).

  In the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 referred to in this specification, when the drive mode is the touch drive mode as described above, the touch drive signal is applied to all or a part of the touch. When the driving mode is the display driving mode, it serves as a common electrode to which a pixel electrode (Pixel Electrode) formed on the panel and a common voltage Vcom for forming a liquid crystal capacitor are applied.

  Here, in the display driving mode, the pixel electrode and the common electrodes S11 to S14, S21 to S24, and S31 are formed so that a horizontal electric field is formed between the pixel electrode and the common electrodes S11 to S14, S21 to S24, and S31 to S34. -S34 can be formed on the same substrate.

  For this reason, the touch screen panel-integrated display device 100 according to an embodiment of the present invention is, for example, a method of expressing a screen while horizontally arranging liquid crystal molecules and rotating them to their original positions. In addition, an IPS (In-Plane Switching) type liquid crystal display device having advantages such as high resolution, power saving, and wide viewing angle may be used. More specifically, an AH-IPS (Advanced High Performance-IPS) type liquid crystal display device may be used.

  FIG. 2 is a diagram illustrating capacitance components (Cself, Cpara1, Cpara2) generated in the touch drive mode in the touch screen panel integrated display device 100 according to an embodiment of the present invention.

  Referring to FIG. 2, a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 function as touch electrodes in the touch drive mode and serve as common electrodes that form pixel electrodes and liquid crystal capacitors in the display drive mode. In order to detect the presence / absence of touch and touch coordinates in the touch driving mode, a capacitance (Cself) may be formed between a finger and a pointer such as a pen, but the display data line DL and the gate line GL There is a possibility that an unnecessary parasitic capacitance (Cpara: Parasitic Capacitance, Cpara1, Cpara2) is formed between the two.

  The parasitic capacitance (Cpara) generated in the touch drive mode acts as a large load (Load) for touch drive, which may reduce the accuracy of touch sensing or make the touch sensing itself impossible. . Such parasitic capacitance (Cpara) increases as the size of the display device 100 or the display panel 110 increases, which may cause a larger problem in touch sensing.

  For this reason, in this embodiment, an unnecessary parasitic capacitance (Cpara1) is not formed between the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 that serve as touch electrodes in the touch drive mode and the gate line GL. Therefore, in the touch drive mode, the gate driver 130 may apply touch drive signals (touch) applied to all or some of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 used for touch electrodes. Sensing voltage) or a signal (voltage) having the same phase and magnitude as the touch drive signal is applied to the gate line GL.

  Thus, the touch drive signal (touch sensing voltage) applied to all or a part of the plurality of electrodes S11 to S14, S21 to S24, S31 to S34 used for the touch electrode, or the phase and magnitude of the touch drive signal. If the same signal (voltage) is applied to the gate line GL, no potential difference is generated between the electrode used for the touch electrode and the gate line GL. Parasitic capacitance (Cpara1) is not formed.

  Further, in order to prevent unnecessary parasitic capacitance (Cpara2) from being formed between the plurality of electrodes S11 to S14, S21 to S24, S31 to S34 and the data line DL, which serve as touch electrodes in the touch drive mode, In the touch driving mode, the data driving unit 120 is configured to use a touch driving signal (touch sensing voltage) applied to all or a part of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 used for touch electrodes, or the touch driving. A signal (voltage) having the same phase and magnitude as the signal may be further applied to the data line DL.

  Thus, the touch drive signal (touch sensing voltage) applied to all or a part of the plurality of electrodes S11 to S14, S21 to S24, S31 to S34 used for the touch electrode, or the phase and magnitude of the touch drive signal. If the same signal (voltage) is applied to the data line DL, a potential difference does not occur between the electrode used for the touch electrode and the data line DL. Parasitic capacitance (Cpara2) is not formed.

  As described above, in the touch drive mode, a touch drive signal applied to electrodes (a plurality of electrodes) serving as touch electrodes or a signal corresponding to the touch drive signal is all or part of the plurality of gate lines GL. In some cases, a touch drive signal applied to an electrode (a plurality of electrodes) serving as a touch electrode or a signal corresponding to the touch drive signal is further applied to all or part of the plurality of data lines DL. By applying the voltage, the sensing sensitivity can be improved by eliminating the RC load (Load) due to the parasitic capacitances (Cpara1, Cpara2) formed by the electrodes used for the touch electrodes and the gate lines GL and the data lines DL. . In addition, an in-cell touch screen panel can be realized not only in a small display but also in a medium and large display.

  Hereinafter, to the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 that serve as both the common electrode and the touch electrode, which are included in the touch screen panel integrated display device 100 according to the embodiment of the present invention. Common voltage and touch drive signal application method, data voltage to DL data line and touch drive signal (or corresponding signal) application method, data voltage to gate line GL and touch drive signal (or corresponding) The signal application method will be described in more detail.

  First, the panel 110 included in the touch screen panel integrated display device 100 according to an embodiment of the present invention will be described in more detail with reference to FIGS.

  FIG. 3 is a plan view illustrating a panel 110 included in the touch screen panel-integrated display device 100 according to an embodiment of the present invention.

  Referring to FIG. 3, on the panel 110, as described above, a plurality of data lines DL, a plurality of gate lines GL, and a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 are formed.

  In addition, as described above, the panel 110 can operate in the display driving mode, and can also operate in the touch driving mode.

  In this connection, the plurality of data lines DL and the plurality of gate lines GL formed on the panel 110 are configured so that the panel 110 serves as a display panel.

  And several electrode S11-S14, S21-S24, S31-S34 formed in the panel 110 is the structure for the panel 110 to perform both the role of a display panel and the role of a touch screen panel.

  More specifically, when the panel 110 serves as a display panel, that is, when the driving mode of the panel 110 is the display driving mode, a common voltage is applied to the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34. (Vcom: Common Voltage) is applied to become a pixel electrode (not shown) and a common electrode (hereinafter also referred to as a Vcom electrode) forming a liquid crystal capacitor.

  When the panel 110 serves as a touch screen panel, that is, when the drive mode of the panel 110 is the touch drive mode, a touch drive voltage is applied to the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34. Then, a capacitor is formed between the touch pointer (eg, finger, pen, etc.), and the capacitance of the capacitor thus formed becomes a touch electrode to be measured.

  That is, the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serve as common electrodes (Vcom electrodes) in the display drive mode, and serve as touch electrodes in the touch drive mode.

  In the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34, the common voltage Vcom is applied in the display drive mode, and the touch drive signal is applied in the touch drive mode.

  Therefore, as shown in FIG. 3, a plurality of electrodes S11 to S14, S21 to S24, S31 to S11 to S14, S21 to S24, and S31 to S34 are transmitted to transmit a common voltage or a touch drive signal. Signal lines SL11 to SL14, SL21 to SL24, and SL31 to SL34 can be connected to S34.

  Accordingly, in the touch drive mode, the touch drive signal Vtd generated by the touch integrated circuit 140 through the signal lines SL11 to SL14, SL21 to SL24, and SL31 to SL34 is applied to the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34. In the display driving mode, the common voltage Vcom supplied from a common voltage supply unit (not shown) through the signal lines SL11 to SL14, SL21 to SL24, and SL31 to SL34 is transmitted to all or a part of the electrodes S11 to S14, Applied to S21 to S24, S31 to S34.

  Referring to FIG. 3, one pixel (P: Pixel) is defined corresponding to each of intersections of the plurality of data lines DL and the plurality of gate lines GL formed on the panel 110. Here, each pixel may be any one of a red (R) pixel, a green (G) pixel, a blue (B) pixel, and the like.

  Referring to FIG. 3, the region where each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as a common electrode and a touch electrode is formed (hereinafter also referred to as a unit touch electrode region) includes 2 pieces. More than one pixel (P) can be defined. That is, any one of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 corresponds to two or more pixels (P).

  For example, one region (unit touch electrode region) in which each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as a common electrode and a touch electrode is formed has 24 × 3 data. A line DL and 24 gate lines GL are arranged to define 24 × 3 × 24 pixels (P).

  On the other hand, each of the plurality of electrodes S11 to S14, S21 to S24, S31 to S34 serving as a common electrode and a touch electrode may be a block-shaped pattern as shown in FIG. A pattern including a comb-shaped portion may be used.

  An example in which each of the plurality of electrodes S11 to S14, S21 to S24, S31 to S34 serving as a common electrode and a touch electrode is a pattern including a comb-shaped portion is shown in the plan view of FIG. 17 and FIG. It can be confirmed through the sectional view shown.

  Although the plurality of electrodes serving as both the touch electrode and the common electrode referred to in this specification are arranged in a matrix form of 3 rows and 4 columns in the drawings, the number of electrodes is 12. This is merely an example for convenience of description, and the roles of both the touch electrode and the common electrode are considered in consideration of the size of the touch screen panel integrated display device 100 and the panel 110, the touch system design criteria, and the like. A plurality of electrodes can be formed in various matrix types and various numbers.

  FIG. 4 is a view exemplarily showing a cross-sectional view of the panel 110 included in the touch screen panel integrated display device 100 according to an embodiment of the present invention.

  FIG. 4 is a cross-sectional view showing a region (unit touch electrode region) in which any one of a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as a common electrode and a touch electrode is formed. It is.

  Referring to FIG. 4, the panel 110 included in the touch screen panel integrated display device 100 according to an exemplary embodiment of the present invention includes a gate line 402 on a lower substrate 400 in a second direction (lateral direction, FIG. 4 and the gate insulating layer 404 is formed thereon.

  A data line 406 is formed on the gate insulating layer 404 in a first direction (longitudinal direction, a direction perpendicular to the paper surface in FIG. 4), and a first protective layer (Passivation Layer) 408 is formed thereon.

  A pixel electrode 410 and a signal line 412 of each pixel region are formed on the first protective layer 408, and a second protective layer 414 is formed thereon. Here, the signal line 412 is connected from each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as a common electrode and a touch electrode to the touch integrated circuit 140. In the display driving mode, the signal line 412 is a common voltage supply unit. The generated common voltage (Vcom) is transmitted to the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34. In the touch drive mode, the touch drive signal generated by the touch integrated circuit 140 is transmitted to the plurality of electrodes S11 to S14, This is transmitted to S21 to S24 and S31 to S34.

  One electrode 416 serving as a common electrode and a touch electrode is formed on the second protective layer 414, and a liquid crystal layer 418 is formed thereon. Here, the one electrode 416 serving as the common electrode and the touch electrode may be a pattern having a block shape as any one of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34.

  An upper substrate 420 on which a black matrix, a color filter, and the like are formed is disposed on the liquid crystal layer 418.

  FIG. 5 is another plan view showing the panel 110 included in the display device 100 with an integrated touch screen panel according to an embodiment of the present invention.

  Referring to FIG. 5, unlike FIG. 3, signal lines SL <b> 11 to SL <b> 14, SL <b> 21 to SL <b> 24, which are connected to each of the plurality of electrodes S <b> 11 to S <b> 14, S <b> 21 to S <b> 24, S <b> 31 to S < SL31 to SL34 may be formed in parallel along a second direction (lateral direction) in which the gate line GL is formed.

  In such a case, the touch drive signal generated by the touch integrated circuit 140 or the common voltage generated or supplied by the common voltage power supply unit may be signal lines SL11 to SL14, SL21 to SL24, SL31 formed in parallel to the gate lines. Can be transmitted to all or part of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 through -SL34.

  FIG. 6 is an equivalent circuit diagram of the unit touch electrode region 600 of the panel 110 included in the touch screen panel integrated display device 100 according to an embodiment of the present invention.

  Referring to FIG. 6, in the panel 110 included in the touch screen panel integrated display device 100 according to an embodiment of the present invention, a plurality of pixels are arranged in the unit touch electrode region 600.

  Referring to FIG. 6, in the unit touch electrode region 600, i data lines DL1 to DLi and j gate lines GL1 to GLj are formed, and i × j unit pixels (Unit Pixels; Sub-Pixels) are formed. Defined.

  Referring to FIG. 6, in each pixel region (unit pixel region), a source electrode (or drain electrode) is connected to any one of the data lines DL1 to DLi, and a gate electrode is any one of the gate lines GL1 to GLj. A transistor 610 that is connected together and has a drain electrode (or source electrode) connected to the pixel electrode 621 is provided.

  Referring to FIG. 6, the pixel electrode 621 connected to the drain electrode (or source electrode) of the transistor 610 disposed in each pixel region forms a liquid crystal capacitor 620 together with the other electrode 622.

  The other electrode 622 in the region of each pixel mentioned above is a common electrode to which the common voltage Vcom is applied as any one of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34.

  Hereinafter, a driving method of the touch screen panel-integrated display device 100 according to an embodiment of the present invention will be described with reference to FIGS. 7 and 8, and a plurality of electrodes S11 to S11 serving as both a common electrode and a touch electrode will be described. Application method of common voltage and touch drive signal to S14, S21 to S24, S31 to S34, application method of data voltage and touch drive signal (or corresponding signal) to data line DL, data to gate line GL A method of applying a voltage and a touch driving signal (or a signal corresponding thereto) will be described in more detail with reference to FIGS.

  FIG. 7 is a view for explaining a driving method of the display device 100 with an integrated touch screen panel according to an embodiment of the present invention.

  Referring to FIG. 7, the touch screen panel-integrated display device 100 according to an exemplary embodiment of the present invention can alternately operate in a display driving mode and a touch driving mode. In some cases, it is possible to operate in only one of the display driving mode and the touch driving mode for a specific time.

  Referring to FIG. 7, the operation time Td in the display drive mode and the operation time Tt in the touch drive mode may be set to be the same, or one may be set longer than the other. In some cases, the operation time Td in the display drive mode and the operation time Tt in the touch drive mode may be set adaptively according to the current state of the touch screen panel integrated display device 100.

  Referring to FIG. 7, the driving method of the touch screen panel integrated display device 100 according to the embodiment of the present invention basically includes a plurality of common electrodes (Vcom electrodes) S11 to S14, S21 to S24 at the display driving timing. , S31 to S34, the common voltage Vcom is applied, the data voltage Vdata is supplied to each of the plurality of data lines DL, and the scan signal (VGL or VGH) is sequentially supplied to each of the plurality of gate lines GL. A touch driving signal (Vtd: Touch Driving Voltage) is applied to all or a part of the plurality of common electrodes S11 to S14, S21 to S24, and S31 to S34 at the time of display driving (Display Driving Step) and touch driving timing, and Multiple gate lines G Including all or part for touch drive signal Vtd or signal corresponding to the touch drive signal Vtd and touch drive step of further applying (Vtd, the voltage phase and the same size) (Touch Driving Step) of.

  In the touch driving stage, a touch driving signal Vtd or a signal corresponding to the touch driving signal Vtd (Vtd, phase and voltage of the same magnitude) can be further applied to all or a part of the plurality of data lines.

  FIG. 8 illustrates a driving method of the touch screen panel integrated display device 100 according to an exemplary embodiment of the present invention, including various voltages (common voltage (Vcom), data voltage Vdata, scan signals VGH, VGL, and touch drive signal Vtd). FIG. 10 is an equivalent circuit diagram in a unit touch electrode region 600 for explaining a supply method.

  Referring to FIG. 8, one unit touch electrode region 600 corresponding to one of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 has i data lines DL1 to DLi and j. Gate lines GL1 to GLj pass through.

  Therefore, referring to FIG. 8, one unit touch electrode region 600 corresponding to one of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 has i × j pixels (P ) Is defined.

  Referring to FIG. 8, one transistor 610 is disposed for each pixel region of each pixel (P), and one liquid crystal capacitor 620 is formed in the display driving mode.

  First, application (supply) of various signals (data voltage, scan signal, common voltage) when the drive mode is the display drive mode will be described.

  Referring to FIG. 8, when the driving mode is the display driving mode, the data driving unit 120 applies the data voltage (Vdata; pixel voltage) to the i data lines DL1 to DLi through the i data line multiplexers MUXd1 to MUXdi. Supply).

  Referring to FIG. 8, when the driving mode is the display driving mode, the gate driver 130 turns on one of the gate lines GL1 to GLj through the j gate line multiplexers MUXg1 to MUXgj. A voltage level scan signal (example: VGH) is supplied, and the remaining gate lines are supplied with a turn-off voltage level scan signal (example: VGL) to sequentially drive the j gate lines GL1 to GLj.

  Referring to FIG. 8, when the driving mode is the display driving mode, the common voltage supply unit, for example, the electrode corresponding to the unit touch electrode region 600 through the common electrode (or touch electrode) multiplexer MUXs of the data driving unit 120. The common voltage Vcom is supplied to all of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 including S11.

  Next, application (supply) of various signals (touch drive signals) when the drive mode is the touch drive mode will be described.

  Referring to FIG. 8, when the driving mode is the touch driving mode, the touch integrated circuit 140, for example, through the touch electrode (or common electrode) multiplexer MUXs of the data driving unit 120, if necessary, the unit touch electrode region. The touch drive signal Vtd is supplied to the electrode S11 corresponding to 600.

  Referring to FIG. 8, when the driving mode is the touch driving mode, the gate driving unit 130 is applied to the electrode S11 serving as a touch electrode through the j gate line multiplexers MUXg1 to MUXgj, if necessary. The touch drive signal Vtd or the waveform signal having the same phase and voltage as the touch drive signal Vtd is supplied to the j gate lines GL1 to GLj.

  The touch drive signal Vtd or a waveform signal having the same phase and voltage is applied to the j gate lines GL1 to GLj through a capacitor so that the turn-off (Turn-Off) state of the pixel is maintained. Is done.

  Referring to FIG. 8, when the driving mode is the touch driving mode, the data driving unit 120 is applied to the electrode S11 serving as a touch electrode through the i data line multiplexers MUXd1 to MUXdi, if necessary. The touch drive signal Vtd or the waveform signal having the same phase and the same voltage is supplied to the i data lines DL1 to DLi.

  On the other hand, the j gate line multiplexers MUXg1 to MUXgj shown in FIG. 8 may be realized by one gate line multiplexer.

  In this case, one gate line multiplexer includes a turn-on voltage level scan signal VGH, a turn-off voltage level scan signal VGL, and a voltage (eg, ΔV / 2) added to a specific voltage (eg, VGL) (eg, ΔV / 2). : VGL + ΔV / 2), and a voltage (eg, VGL−ΔV / 2) obtained by subtracting a voltage change amount (eg, ΔV / 2) from a specific voltage (eg, VGL) is received.

  Accordingly, in the display driving mode, one gate line multiplexer selectively selects one of the scan signal VGH at the turn-on voltage level and the scan signal VGL at the turn-off voltage level as j gate lines GL1 to GLj. Output to.

  In the touch drive mode, one gate line multiplexer has a specific voltage (example: VGL) plus a voltage change amount (example: ΔV / 2) (example: VGL + ΔV / 2) and a specific voltage (example: VGL). The touch drive signal Vtd that can be expressed by a voltage (example: VGL−ΔV / 2) obtained by subtracting a voltage change amount (example: ΔV / 2) from VGL) is applied to all or part of the j gate lines GL1 to GLj. It is possible to output.

  In the following, referring to FIGS. 9 to 12, when the drive mode is the touch drive mode, the touch drive signal Vtd is applied to the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as touch electrodes. How to do will be described.

  However, FIGS. 9 and 10 are diagrams illustrating a case where a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 functioning as touch electrodes are grouped along the vertical direction to perform vertical touch sensing. 11 and 12 show a case where a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 that play the role of touch electrodes are grouped along the horizontal direction to perform horizontal touch sensing. FIG.

  Before describing with reference to the drawings, when the drive mode is the touch drive mode, a method of applying the touch drive signal Vtd to the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 that serve as touch electrodes. Briefly described.

  When the drive mode is the touch drive mode, the touch integrated circuit 140 simultaneously applies a touch drive signal to all of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as touch electrodes. A touch drive signal can be applied to a part of S11 to S14, S21 to S24, and S31 to S34.

  When the touch integrated circuit 140 applies a touch drive signal to some of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34, the touch integrated circuit 140 includes the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34. One electrode group of the plurality of electrode groups grouped as is set as a touch sensing electrode group, and is sequentially selected and a touch drive signal is applied to the touch sensing electrode group.

  The touch integrated circuit 140 may further apply a touch drive signal to at least one electrode group adjacent to the touch sensing electrode group in order to improve touch sensing accuracy.

  9 and 10 show a case where touch sensing is performed for each touch electrode column (vertical touch electrode group; Gc1, Gc2, Gc3, Gc4) in the touch screen panel integrated display device 100 according to an embodiment of the present invention. 6 is a diagram illustrating a method of applying a touch drive signal to the touch electrodes S11 to S14, S21 to S24, and S31 to S34.

  9 and 10, among the four touch electrode groups Gc1 to Gc4 in the vertical direction, touch sensing electrode groups (a group of electrodes of the same column line (Column Line)) in which touch sensing is performed are S12, S22, Take Gc2 including S32 as an example.

  Referring to FIG. 9, the touch drive signal Vtd is transmitted to the signal lines SL11, SL21, SL31, SL12, SL22, SL32, SL13, SL23, SL33, SL14, SL24 through the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34. All can be applied through SL34. That is, the touch drive signal Vtd can be applied to all of the four touch electrode groups Gc1 to Gc4 in the vertical direction.

  In another application method, as shown in FIG. 10, the touch drive signal can be applied to only a part of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34.

  More specifically, referring to FIG. 10, the touch drive signal is applied to S12, S22, and S32 included in the touch sensing electrode group Gc2 through the signal lines SL12, SL22, and SL32.

  The touch drive signal is not applied to the electrodes S11, S21, S31, S13, S23, S33, S14, S24, and S34 included in the remaining electrode groups Gc1, Gc3, and Gc4 excluding the touch sensing electrode group Gc2. May be.

  On the other hand, referring to FIG. 10, for the efficiency of touch sensing, a touch drive signal is applied to S12, S22, and S32 included in the touch sensing electrode group Gc2, and at the same time, an electrode adjacent to the touch sensing electrode group Gc2. It may be applied to the electrodes S11, S21, S31, S13, S23, and S33 included in the groups Gc1 and Gc3.

  Note that the touch drive signal is not applied to the electrodes S14, S24, and S34 included in the electrode group Gc4 that is not adjacent to the touch sensing electrode group Gc2.

  11 and 12 illustrate touch electrodes when touch sensing is performed for each touch electrode row (horizontal touch electrode group) Gr1, Gr2, and Gr3 in the touch screen panel integrated display device 100 according to an embodiment of the present invention. It is the figure which showed the method of applying a touch drive signal to S11-S14, S21-S24, S31-S34.

  11 and 12, among the three touch electrode groups Gr1 to Gr3 in the horizontal direction, touch sensing electrode groups (a group of electrodes on the same row line) in which touch sensing is performed are S11, S12, An example is Gr1 including S13 and S14.

  Referring to FIG. 11, the touch drive signal Vtd is applied to the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 as signal lines SL11, SL21, SL31, SL12, SL22, SL32, SL13, SL23, SL33, SL14, SL24, All can be applied through SL34. That is, the touch drive signal Vtd can be applied to all the three touch electrode groups Gr1 to Gr3 in the horizontal direction.

  In another application method, as shown in FIG. 12, the touch drive signal can be applied to only some of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34.

  More specifically, referring to FIG. 12, the touch drive signal is applied to S11, S12, S13, and S14 included in the touch sensing electrode group Gr1 through the signal lines SL11, SL12, SL13, and SL14.

  The touch drive signal may not be applied to the electrodes S21, S22, S23, S24, S31, S32, S33, and S34 included in the remaining electrode groups Gr2 and Gr3 excluding the touch sensing electrode group Gr1.

  Meanwhile, referring to FIG. 12, for the efficiency of touch sensing, the touch drive signal is applied to S11, S12, S13, and S14 included in the touch sensing electrode group Gr1, and at the same time, adjacent to the touch sensing electrode group Gr1. The electrodes S21, S22, S23, and S24 included in the matching electrode group Gr2 may also be applied through the signal lines SL21, SL22, SL23, and SL24.

  The touch drive signal is not applied to the electrodes S31, S32, S33, and S34 included in the electrode group Gr3 that is not adjacent to the touch sensing electrode group Gr1.

  As described above with reference to FIGS. 9 to 12, the touch drive signal is applied to only a part of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as touch electrodes, thereby touching. The power consumption of the screen panel integrated display device 100 can be reduced.

  Hereinafter, a method for applying a touch drive signal to the data line and the gate line when the drive mode is the touch drive mode will be described with reference to FIGS.

  FIGS. 13 and 14 illustrate touching a data line and a gate line when touch sensing is performed for each touch electrode array (vertical touch electrode group) in the touch screen panel-integrated display device 100 according to an embodiment of the present invention. It is the figure which showed the method of applying a drive signal.

  13 and 14, among the four touch electrode groups Gc1 to Gc4 in the vertical direction, touch sensing electrode groups (an assembly of electrodes of the same column line (Column Line)) in which touch sensing is performed are S12, S22, Take Gc2 including S32 as an example.

  Referring to FIG. 13, the data driver 120 and / or the gate driver 130 may include a plurality of data lines DL and / or a plurality of gate lines GL formed on the panel 110 so that a parasitic capacitor (Cpara) is not formed. The touch drive signal Vtd or a signal corresponding thereto can be applied to all. That is, the touch drive signal Vtd or a signal corresponding thereto can be applied to all data lines and / or all gate lines corresponding to the four vertical touch electrode groups Gc1 to Gc4.

  As another application method, referring to FIG. 14, when the drive mode is the touch drive mode, the data driver 120 outputs the touch drive signal or a signal corresponding to the touch drive signal to a part of the plurality of data lines DL. Can be applied.

  Referring to FIG. 14, when the data driving unit 120 applies a touch driving signal or a signal corresponding to the touch driving signal to a part of the plurality of data lines DL, the touch selected from the plurality of electrode groups Gc1 to Gc4. A touch drive signal or a signal corresponding to the touch drive signal can be applied to at least one data line 1400 corresponding to the sensing electrode group Gc2. Such a partial application method can significantly reduce power consumption as compared with the whole application method of FIG.

  Meanwhile, referring to FIG. 14, when the data driver 120 applies a touch driving signal or a signal corresponding to the touch driving signal to at least one data line 1400 corresponding to the touch sensing electrode group Gc2, the touch sensing electrode group Gc2 is applied. A touch drive signal or a signal corresponding to the touch drive signal can be further applied to at least one data line 1410, 1420 corresponding to the electrode groups Gc1, Gc3 adjacent to each other. Thereby, the accuracy of touch sensing can be further improved.

  As shown in FIG. 14, when the data driver 120 applies a touch drive signal or a signal corresponding to the touch drive signal to a part of the plurality of data lines DL, the touch drive signal or A signal corresponding to the touch drive signal can be applied through the gate driver 130.

  As shown in FIG. 14, when the data driver 120 applies a touch drive signal or a signal corresponding to the touch drive signal to a part of the plurality of data lines DL, each of the plurality of electrode groups Gc1 to Gc4 includes a plurality of It is an aggregate of two or more electrodes formed in the same column (Column) along the first direction among the electrodes S11 to S14, S21 to S24, and S31 to S34.

  15 and 16 illustrate data lines when touch sensing is performed for each touch electrode row (horizontal touch electrode group) Gr1, Gr2, and Gr3 in the touch screen panel integrated display device 100 according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a method for applying a touch drive signal to a gate line.

  15 and 16, among the three touch electrode groups Gr1 to Gr3 in the horizontal direction, touch sensing electrode groups (a group of electrodes in the same row line) in which touch sensing is performed are S11, S12, An example is Gr1 including S13 and S14.

  Referring to FIG. 15, the data driver 120 and / or the gate driver 130 may include a plurality of data lines DL and / or a plurality of gate lines GL formed on the panel 110 so that the parasitic capacitor Cpara is not formed. The touch drive signal Vtd or a signal corresponding thereto can be applied to all. That is, the touch drive signal Vtd or a signal corresponding thereto can be applied to all the data lines and / or all the gate lines corresponding to the three touch electrode groups Gr1 to Gr3 in the horizontal direction.

  As another application method, referring to FIG. 16, when the driving mode is the touch driving mode, the gate driving unit 130 applies the touch driving signal or a signal corresponding to the touch driving signal to a part of the plurality of gate lines GL. Can be applied.

  Referring to FIG. 16, the gate driver 130 is selected from the plurality of electrode groups Gr1 to Gr3 when the touch driving signal or a signal corresponding to the touch driving signal is applied to a part of the plurality of gate lines GL. A touch drive signal or a signal corresponding to the touch drive signal can be applied to at least one gate line 1600 corresponding to the touch sensing electrode group Gr1. Such a partial application method can significantly reduce power consumption as compared with the whole application method of FIG.

  Meanwhile, referring to FIG. 16, when the gate driving unit 130 applies a touch driving signal or a signal corresponding to the touch driving signal to at least one gate line 1600 corresponding to the touch sensing electrode group Gr1, the touch sensing electrode group Gr1. A touch drive signal or a signal corresponding to the touch drive signal can be further applied to at least one gate line 1610 corresponding to the electrode group Gr2 adjacent to the touch line. Thereby, the accuracy of touch sensing can be further improved.

  As shown in FIG. 16, when the gate driving unit 130 applies a touch driving signal or a signal corresponding to the touch driving signal to a part of the plurality of gate lines GL, the touch driving signal or touch is applied to the whole of the plurality of data lines DL. A signal corresponding to the drive signal can be applied via the data driver 120.

  As shown in FIG. 16, when the gate driver 130 applies a touch drive signal or a signal corresponding to the touch drive signal to a part of the plurality of gate lines GL, each of the plurality of electrode groups Gr1 to Gr3 includes a plurality of electrode groups Gr1 to Gr3. Among the electrodes S11 to S14, S21 to S24, and S31 to S34, this is an assembly of two or more electrodes formed in the same row along the second direction.

  FIG. 17 illustrates a case where each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as a touch electrode has a comb shape in the touch screen panel integrated display device 100 according to an embodiment of the present invention. It is a top view which shows the unit touch electrode area | region in which S11 electrode was formed.

  Each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 that can function as both a common electrode and a touch electrode may be a block-shaped pattern as shown in FIGS. As in the case of the electrode S11 shown in FIG. 17, a comb-shaped pattern may be used because of a high aperture ratio, a wide wide viewing angle, and the like.

  FIG. 18 illustrates a case where each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as a touch electrode has a comb shape in the touch screen panel integrated display device 100 according to an embodiment of the present invention. It is sectional drawing of a unit touch electrode area | region.

  Referring to FIG. 18, in the panel 110 included in the touch screen panel integrated display device 100 according to an embodiment of the present invention, as an example, a gate line 1802 is formed on a lower substrate 1800 in a second direction (lateral direction, FIG. 18, and a gate insulating layer 1804 is formed thereon.

  A data line 1806 is formed on the gate insulating layer 1804 along a first direction (longitudinal direction, a direction perpendicular to the paper surface in FIG. 18), and a first protection layer (Passivation Layer) 408 is formed thereon.

  A pixel electrode 1810 and a signal line 1812 of each pixel region are formed on the first protective layer 1808, and a second protective layer 1814 is formed thereon. Here, the signal line 1812 is connected from each of the plurality of electrodes S11 to S14, S21 to S24, and S31 to S34 serving as a common electrode and a touch electrode to the touch integrated circuit 140, and transmits a touch drive signal in the touch drive mode. It is a transmission line.

  One electrode 1816 serving as a common electrode and a touch electrode is formed on the second protective layer 1814, and a liquid crystal layer 1818 is formed thereon. Here, one electrode 1816 serving as a common electrode and a touch electrode is divided into a plurality of comb-shaped portions as any one of a plurality of electrodes S11 to S14, S21 to S24, and S31 to S34. What is shown is shown in FIG.

  An upper substrate 1820 on which a black matrix, a color filter, and the like are formed is disposed on the liquid crystal layer 1818.

  As described above, according to the present invention, the touch that increases the touch driving load to reduce the accuracy of touch sensing or prevents the formation of parasitic capacitance that may make the touch sensing itself impossible. A screen panel integrated display device 100 and a driving method thereof can be provided.

  In addition, according to the present invention, it is possible to provide a touch screen panel-integrated display device 100 having a medium or large size that cannot be realized due to a parasitic capacitance.

  The above description and the accompanying drawings are merely illustrative of the technical idea of the present invention, and those who have ordinary knowledge in the technical field to which the present invention belongs will be essential to the present invention. Various modifications and variations are possible without departing from the typical characteristics. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for explanation. The scope of the technical idea of the present invention is limited by such an embodiment. It is not something. The protection scope of the present invention should be construed in accordance with the claims, and all technical ideas within the equivalent scope should be construed as being included in the scope of the right of the present invention.

100 Touch Screen Panel Integrated Display Device 110 Panel 120 Data Drive Unit 130 Gate Drive Unit 140 Touch Integrated Circuit 400 Lower Substrate 402 Gate Line 406 Data Line 410 Pixel Electrode 412 Signal Line 416 Electrode (Common Electrode, Touch Electrode)
418 Liquid crystal layer 420 Upper substrate

Claims (14)

A plurality of data lines formed along the first direction and supplying a data voltage when in a display driving mode;
A plurality of gate lines formed along a second direction and sequentially supplying a scan signal in the display driving mode;
A plurality of electrodes grouped into a plurality of electrode groups, to which a touch drive signal is applied when in the touch drive mode,
When the touch drive signal is applied to all or part of the plurality of electrodes in the touch drive mode, the touch drive signal or a signal corresponding to the touch drive signal is all or part of the plurality of gate lines. Applied to
When one of the plurality of electrode groups is selected as the touch sensing electrode group when the touch driving signal or a signal corresponding to the touch driving signal is applied to a part of the plurality of gate lines, The touch drive signal or a signal corresponding to the touch drive signal is applied to at least one corresponding gate line, and is adjacent to one electrode group selected as the touch sensing electrode group among the plurality of electrode groups. The touch screen panel integrated display panel, wherein the touch driving signal or a signal corresponding to the touch driving signal is further applied to at least one gate line corresponding to the electrode group.   2. The touch screen panel integrated display panel according to claim 1, wherein the touch drive signal or the signal corresponding to the touch drive signal is a signal offset by a specific voltage value at a specific voltage. .   3. The touch screen panel integrated display panel according to claim 2, wherein the specific voltage is a turn-off voltage level of a scan signal. A plurality of data lines formed along the first direction and supplying a data voltage when in a display driving mode;
A plurality of gate lines formed along a second direction and sequentially supplying a scan signal in the display driving mode;
A plurality of electrodes grouped into a plurality of electrode groups, to which a touch drive signal is applied when in the touch drive mode,
When the touch drive signal is applied to all or part of the plurality of electrodes in the touch drive mode, the touch drive signal or a signal corresponding to the touch drive signal is all or part of the plurality of gate lines. Applied to
Corresponding to one electrode group selected as a touch sensing electrode group among the plurality of electrodes when the touch driving signal or a signal corresponding to the touch driving signal is applied to a part of the plurality of gate lines. The touch drive signal or a signal corresponding to the touch drive signal is applied to at least one gate line, and the touch drive signal or a signal corresponding to the touch drive signal is further applied to the plurality of data lines. A display screen integrated with a touch screen panel. A plurality of data lines formed along the first direction and supplying a data voltage when in a display driving mode;
A plurality of gate lines formed along a second direction and sequentially supplying a scan signal in the display driving mode;
A plurality of electrodes grouped into a plurality of electrode groups, to which a touch drive signal is applied when in the touch drive mode,
When the touch drive signal is applied to all or part of the plurality of electrodes in the touch drive mode, the touch drive signal or a signal corresponding to the touch drive signal is all or part of the plurality of data lines. Applied to
One electrode group selected as a touch sensing electrode group among the plurality of electrode groups when the touch driving signal or a signal corresponding to the touch driving signal is applied to a part of the plurality of data lines. At least one data line corresponding to the touch driving signal or at least one data line corresponding to an electrode group adjacent to one electrode group selected as the touch sensing electrode group, or a signal corresponding to the touch driving signal. A touch screen panel-integrated display panel, wherein: A plurality of data lines formed along the first direction and supplying a data voltage when in a display driving mode;
A plurality of gate lines formed along a second direction and sequentially supplying a scan signal in the display driving mode;
A plurality of electrodes grouped into a plurality of electrode groups, to which a touch drive signal is applied when in the touch drive mode,
When the touch drive signal is applied to all or part of the plurality of electrodes in the touch drive mode, the touch drive signal or a signal corresponding to the touch drive signal is all or part of the plurality of gate lines. Applied to
The touch driving signal or a signal corresponding to the touch driving signal is further applied to all or a part of the plurality of data lines,
When the touch drive signal or a signal corresponding to the touch drive signal is applied to a part of the plurality of data lines, the touch drive signal or the touch drive signal corresponds to the whole of the plurality of gate lines. A touch screen panel integrated display panel, wherein a signal is applied.   The signal corresponding to the touch drive signal is a signal having the same phase as the touch drive signal, according to any one of claims 1, 4, 5, and 6. Display panel integrated display panel.   The signal corresponding to the touch drive signal is a signal having the same magnitude as the touch drive signal, according to any one of claims 1, 4, 5, and 6. The touch screen panel integrated display panel as described. An integrated circuit for driving a display screen integrated with a touch screen panel in which a plurality of data lines and a plurality of gate lines are formed to define a plurality of pixels and a plurality of common electrodes are arranged,
Apply a common voltage to the plurality of common electrodes at the time of display drive timing,
A touch drive signal is applied to all or a part of the plurality of common electrodes at a touch drive timing, and the touch drive signal or a signal corresponding to the touch drive signal is further applied to all or a part of the plurality of gate lines. And
Corresponds to one electrode group selected as a touch sensing electrode group among the plurality of common electrodes when the touch driving signal or a signal corresponding to the touch driving signal is applied to a part of the plurality of gate lines. The touch drive signal or a signal corresponding to the touch drive signal is applied to at least one gate line, and an electrode adjacent to one electrode group selected as the touch sensing electrode group among the plurality of common electrodes An integrated circuit, wherein the touch drive signal or a signal corresponding to the touch drive signal is applied to at least one gate line corresponding to a group.   The integrated circuit according to claim 9, wherein the touch drive signal or the signal corresponding to the touch drive signal is a signal offset by a specific voltage value at a specific voltage.   The integrated circuit according to claim 9, wherein the specific voltage is a turn-off voltage of a scan signal. An integrated circuit for driving a display screen integrated with a touch screen panel in which a plurality of data lines and a plurality of gate lines are formed to define a plurality of pixels and a plurality of common electrodes are arranged,
Apply a common voltage to the plurality of common electrodes at the time of display drive timing,
A touch drive signal is applied to all or a part of the plurality of common electrodes at a touch drive timing, and the touch drive signal or a signal corresponding to the touch drive signal is further applied to all or a part of the plurality of gate lines. And
Corresponds to one electrode group selected as a touch sensing electrode group among the plurality of common electrodes when the touch driving signal or a signal corresponding to the touch driving signal is applied to a part of the plurality of gate lines. Applying the touch driving signal or a signal corresponding to the touch driving signal to at least one gate line,
The integrated circuit, wherein the touch drive signal or a signal corresponding to the touch drive signal is applied to the whole of the plurality of data lines.   13. The integrated circuit according to claim 9, wherein the signal corresponding to the touch drive signal is a signal having the same phase as the touch drive signal.   The integrated circuit according to claim 9 or 12, wherein the signal corresponding to the drive signal is a signal having the same magnitude as the touch drive signal.

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