JP5385954B2 - Touch screen panel integrated liquid crystal display device and driving method thereof - Google Patents

Description

  The present invention relates to a liquid crystal display device and a driving method thereof, and more particularly to a mutual capacitance type touch screen panel integrated liquid crystal display device and a driving method thereof.

  The touch screen panel is an input device that allows a user's command to be input by selecting the content of an instruction appearing on a screen of a video display device or the like with a human hand or an object.

  For this purpose, the touch screen panel is provided on the front face of the image display device, and converts a contact position where a human hand or an object is in direct contact with an electrical signal. Thereby, the content of the instruction selected by the contact position is accepted as an input signal.

  Since such a touch screen panel can be replaced with a separate input device that operates by being connected to a video display device such as a keyboard and a mouse, the range of use thereof tends to gradually expand.

  Examples of methods for realizing a touch screen panel include a resistive film method, a light sensing method, and a capacitance method. Among these methods, a capacitive touch screen panel is in contact with a human hand or an object. In this case, the contact position is converted into an electrical signal by sensing a change in capacitance formed by the conductive sensing pattern with other sensing patterns in the vicinity or a ground electrode.

  In general, such a touch screen panel is often manufactured by being attached to an outer surface of a flat panel display device such as a liquid crystal display device or an organic light emitting display device.

  However, when the touch screen panel is attached to the outer surface of the flat panel display device as described above, an adhesive layer (adhesive layer) is required between the touch screen panel and the flat panel display device. Since a process for forming a screen panel is required, the process time and process cost increase.

  In addition, the conventional structure has a disadvantage in that the overall thickness of the flat panel display device is increased by attaching the touch screen panel to the outer surface of the flat panel display device.

Korean Published Patent No. 2006-0002204 Korean Published Patent No. 2009-0019902

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a thin touch screen panel integrated liquid crystal display device and a driving method thereof, which reduce process time and process cost. .

  Another object of the present invention is to provide a touch screen panel-integrated liquid crystal display device that increases touch sensitivity without degrading image quality, and a driving method thereof.

According to one aspect of the present invention for achieving the above object, the liquid crystal display device integrated with a touch screen panel of the present invention is connected to a plurality of data lines and a plurality of gate lines divided into a plurality of groups, respectively. A plurality of pixels, a plurality of sensing electrodes, a plurality of common electrodes divided into a plurality of groups, and a plurality of groups of the common electrodes, while simultaneously supplying drive signals to the common electrodes included in the same group Thus, for different groups, a common electrode driving unit that sequentially supplies drive signals based on each group, and for a plurality of groups of the gate lines, gate signals are sequentially supplied to the gate lines belonging to each group for each group. It is seen including a gate driver, wherein the common electrode driver, in a period other than the period in which the driving signal is supplied, and supplying the same common voltage to all the common electrodes.

  The touch screen panel-integrated liquid crystal display device according to the present invention further includes first and second substrates spaced apart from each other, and a liquid crystal layer formed between the first substrate and the second substrate. It is characterized by including.

Further, the common electrode and the sensing electrode, characterized in that located on one of the different layers of the first and second substrates.

  The sensing electrode and the common electrode may cross each other.

  The common electrode may form a plurality of groups that are sequentially divided.

  The gate lines may form a plurality of groups divided based on a certain order difference.

  The drive signal has a voltage higher than the common voltage.

  Further, the gate driver sequentially sends gate signals to the gate lines belonging to each group for two groups in which the plurality of gate lines are divided into odd-numbered gate lines and even-numbered gate lines. It is characterized by supplying to.

  Further, the common electrode driving unit includes a plurality of groups in which the plurality of odd-numbered common electrodes and the plurality of even-numbered common electrodes are respectively divided in order. On the other hand, for different groups, a drive signal is sequentially supplied based on each group for a plurality of groups composed of odd-numbered common electrodes, and each group is defined for a plurality of groups composed of even-numbered common electrodes. The driving signals are sequentially supplied to the power supply.

  In addition, the drive signal is supplied to the plurality of groups including the odd-numbered common electrodes before the gate signal is supplied to the group including the odd-numbered gate wirings, and is supplied to the plurality of groups including the even-numbered common electrodes. The drive signal is supplied before the gate signal is supplied to the group of even-numbered gate wirings.

The touch screen panel-integrated liquid crystal display device driving method according to the present invention includes a plurality of pixels connected to a plurality of data wirings and a plurality of gate wirings divided into a plurality of groups, a plurality of sensing electrodes, and a plurality of sensing electrodes. A touch screen panel-integrated liquid crystal display device driving method including a plurality of common electrodes divided into groups, wherein a plurality of groups in which the plurality of common electrodes are sequentially divided are included in the same group For a plurality of groups in which a drive signal is supplied to the electrodes at the same time, while for different groups, a drive signal is sequentially supplied based on each group, and a plurality of gate wirings are divided based on a certain order difference. sequentially saw including a step (a) supplying a gate signal to the gate line belonging to each group for each group, in said step (a), the period other than the period in which the driving signal is supplied, all Same common voltage to the common electrode, characterized in that it is supplied.

  The drive signal has a voltage higher than the common voltage.

  Further, in the step (a), the plurality of gate wirings are divided into two groups of odd-numbered gate wirings and even-numbered gate wirings so as to have an order difference 2.

  In addition, in the step (a), for the plurality of groups in which the plurality of odd-numbered common electrodes and the plurality of even-numbered common electrodes are respectively divided in order, the drive signals are simultaneously applied to the common electrodes included in the same group. On the other hand, for different groups, a drive signal is sequentially supplied to a plurality of groups composed of odd-numbered common electrodes with reference to each group, and each group regarding a plurality of groups composed of even-numbered common electrodes. The drive signals are sequentially supplied with reference to the above.

  Further, in the step (a), the driving signal is supplied to the plurality of groups including the odd-numbered common electrodes before the gate signal is supplied to the group including the odd-numbered gate wirings. The driving signal is supplied to the plurality of groups of electrodes before the gate signal is supplied to the group of even-numbered gate wirings.

  According to the present invention, a common electrode provided in a liquid crystal display device is used as a drive electrode of a mutual electrostatic capacitance type touch screen panel, thereby reducing process time and process cost and integrating a thin touch screen panel. The liquid crystal display device and the driving method thereof can be provided.

  In addition, according to the present invention, it is possible to provide a touch screen panel-integrated liquid crystal display device that increases touch sensitivity without degrading image quality and a driving method thereof.

1 is a block diagram illustrating a touch screen panel integrated liquid crystal display device according to an embodiment of the present invention. FIG. 2 is an equivalent circuit diagram of the pixel shown in FIG. 1. 1 is a cross-sectional view of a region of a touch screen panel integrated liquid crystal display device according to an embodiment of the present invention. It is a figure which shows the structure of the common electrode pattern (drive electrode) and sensing electrode which are shown in FIG. It is a graph which shows the drive which concerns on 1st Embodiment of this invention. FIG. 6 is a waveform diagram showing signals provided by a common electrode driver and a gate driver for driving shown in FIG. 5. It is a graph which shows the drive which concerns on 2nd Embodiment of this invention. FIG. 8 is a waveform diagram showing signals provided by a common electrode driver and a gate driver for driving shown in FIG. 7. It is a figure which shows the other structure of the common electrode pattern (drive electrode) and sensing electrode which are shown in FIG. It is a graph which shows the drive which concerns on 3rd Embodiment of this invention. FIG. 11 is a waveform diagram illustrating signals provided by a common electrode driver and a gate driver for driving shown in FIG. 10.

  Specific details of embodiments of the invention are included in the detailed description and drawings.

  Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and can be realized in various forms different from each other. In the following description, when a part is connected to another part, This includes not only the case of being directly connected but also the case of being electrically connected with another element interposed therebetween. In the drawings, parts not related to the present invention are omitted for the sake of clarity of description of the present invention, and similar parts are denoted by the same reference numerals throughout the specification.

  Hereinafter, the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram illustrating a liquid crystal display device integrated with a touch screen panel according to an embodiment of the present invention. In particular, FIG. 1 mainly illustrates a configuration for displaying an image by a liquid crystal display device integrated with a touch screen panel. 2 is an equivalent circuit diagram of the pixel shown in FIG. 1, and FIG. 3 is a cross-sectional view of a region of the liquid crystal display device integrated with a touch screen panel according to the present embodiment.

  As shown in FIG. 1, the touch screen panel integrated liquid crystal display device according to an embodiment of the present invention supplies gate signals to gate lines G1 to Gn arranged in a first direction (for example, a horizontal direction). The gate driver 3, the data driver 4 for supplying data signals to the data lines D1 to Dm arranged in the second direction (for example, the vertical direction) intersecting the first direction, the gate lines G1 to Gn, and the data line D1 A plurality of pixels P including thin film transistors Tr connected to Dm, and a common electrode driving unit 5 that supplies a common voltage and a driving signal to the common electrode 70, and includes a gate driving unit 3, a data driving unit 4, and a common electrode driving unit. 5 may be further included.

  The liquid crystal display device is a display device that realizes an image by using the optical anisotropy and polarization properties of the liquid crystal, and the liquid crystal has an elongated molecular structure and an orientation in the optical anisotropy and in the electric field. When placed on the surface, it has a polarization property that changes in the direction of molecular arrangement according to its size.

  For this reason, the liquid crystal display device has a liquid crystal panel formed by bonding a first substrate having a pixel electrode and a common electrode and a second substrate with a liquid crystal layer interposed therebetween, and is selected by a gate signal. A data signal and a common voltage are applied to the pixel electrode and the common electrode of the selected pixel to form a predetermined electric field between the pixel electrode and the common electrode, and then supplied from the backlight according to the changed liquid crystal alignment angle The image is displayed by adjusting the light transmittance.

  2 and 3, the touch screen panel integrated liquid crystal display device has a configuration in which the first substrate 11 and the second substrate 61 face each other with the liquid crystal layer 90 interposed therebetween. However, among these, gate wirings G1 to Gn and data wirings D1 to Dm that intersect vertically and horizontally can be arranged on the upper surface of the first substrate 11, and the gate wirings G1 to Gn and the data wirings D1 to Dm can be arranged. At the intersection of Dm, the thin film transistor Tr is connected to the pixel electrode 50 formed in each pixel P in a one-to-one correspondence.

  Referring to FIG. 2 in detail, the pixel P connected to the i-th gate line Gi and the j-th data line Dj is connected to the i-th gate line Gi and the j-th data line Dj. It includes a thin film transistor Tr connected to each other, a pixel electrode 50 connected to the thin film transistor Tr, and a liquid crystal capacitor Clc connected to the pixel electrode 50 and the common electrode 70.

  As shown in FIG. 3, the thin film transistor Tr includes a gate electrode 15 and source / drain electrodes 33 and 35 connected to the gate wiring, and a semiconductor layer 23 formed between the gate electrode 15 and the source / drain electrodes 33 and 35. Consists of. Here, the semiconductor layer 23 includes an active layer 23a and an ohmic contact layer 23b.

  A gate insulating film 20 is formed on the gate electrode 15, and a protective layer 40 is formed on the source / drain electrodes 33 and 35. The protective layer 40 includes a contact hole 43 that exposes the drain electrode 35.

  Further, a pixel electrode 50 is formed on the protective layer 40 and is connected to the drain electrode 35 through the contact hole 43.

  The liquid crystal capacitor Clc has the pixel electrode 50 and the common electrode 70 of the second substrate 61 as both terminals, and the liquid crystal layer 90 between the electrodes 50 and 70 functions as a dielectric.

  Further, the upper second substrate 61 facing the first substrate 11 has a lattice-like black matrix 63, red, green, and blue color filter patterns 66a, 66b, and 66c, and a transparent common electrode 70 on the back surface. Is formed. The grid-like black matrix 63 surrounds each pixel P region so as to hide non-display regions such as the gate wirings G1 to Gn, the data wirings D1 to Dm, and the thin film transistor Tr. The red, green, and blue color filter patterns 66 a, 66 b, and 66 c are sequentially and repeatedly arranged so as to correspond to the respective pixels P within the black matrix 63. The transparent common electrode 70 is formed of a transparent conductive material (for example, ITO) below the color filter pattern 66.

  Here, an overcoat layer (not shown) may be further formed between the color filter pattern 66 and the common electrode 70. Further, since the positions of the black matrix 63 and the color filter pattern 66 can be changed, the common electrode 70 is formed on the inner surface of the second substrate 61 when the black matrix 63 and the color filter pattern 66 are formed at other positions. obtain.

  Also, as shown in FIG. 3, first and second polarizing plates 80 and 82 are attached to the outer surfaces of the first and second substrates 11 and 61, respectively, and on the polarizing plate positioned in the direction in which the image is displayed. A window 190 as a transparent substrate is attached.

  In the embodiment shown in FIG. 3, since the backlight 300 has a structure located below the first substrate 11, an image is displayed in the direction of the second substrate 61, whereby the window 190 is second polarized by the adhesive layer 192. Mounted on the plate 82. In the embodiment shown in FIG. 3, since the first polarizing plate 80 is provided, the backlight 300 is located below the first polarizing plate 80.

  An image display operation of the liquid crystal display device integrated with a touch screen panel having such a structure will be briefly described as follows.

  First, when a gate signal is applied to the gate electrode 15 of the thin film transistor Tr provided in each pixel P, the active layer 23 a is activated, whereby the source electrode 33 is connected to the data electrode 30 connected to the source electrode 33. Is transmitted to the drain electrodes 35 spaced apart by a predetermined interval via the lower active layer 23a.

  At this time, since the drain electrode 35 is electrically connected to the pixel electrode 50 through the contact hole 43, the voltage of the data signal is applied to the pixel electrode 50, which is a storage capacitor (not shown) provided in each pixel P. ).

  Accordingly, a predetermined image is displayed by adjusting the molecular arrangement of the liquid crystal corresponding to the voltage corresponding to the difference between the voltage applied to the pixel electrode 50 and the voltage applied to the common electrode 70. .

  In the case of a conventional general liquid crystal display device, the common electrode 70 is integrally formed on the entire lower surface of the second substrate 61 and is applied with only the same common voltage.

  In contrast, in the touch screen panel integrated liquid crystal display device according to the present embodiment, the common electrode 70 is formed in a plurality of separated patterns, and this is applied to each other by applying not only a common voltage but also a drive signal. It is used as a drive electrode for a capacitive touch screen panel.

  FIG. 4 is a diagram showing the structure of the common electrode pattern (drive electrode) and the sensing electrode shown in FIG.

  Referring to FIG. 4, the common electrode 70 is not an integral type, but is realized by a plurality of common electrode patterns arranged at a predetermined interval in the first direction (for example, the horizontal direction), and is a mutual capacitance method. Used as drive electrode for touch screen panel.

  Further, the common electrode 70 is formed in the same direction so as to correspond to each of the gate lines G1 to Gn, whereby the i-th common electrode Xi is connected to the pixels in one row to which the i-th gate line Gi is connected. Is done. That is, the pixel electrode 50 included in one row of pixels connected to the i-th gate line Gi connects the i-th common electrode Xi through the liquid crystal capacitor Clc.

  The plurality of sensing electrodes 72 corresponding to the common electrode 70 includes a plurality of sensing electrode patterns arranged at predetermined intervals in a second direction (for example, a vertical direction) intersecting the first direction. Formed on the outside.

  When the second polarizing plate 82 and the window 190 are installed, the sensing electrode 72 may be formed between the second substrate 61 and the window 190. Therefore, as a specific example, as shown in FIG. 3, the sensing electrode 72 may be formed on the upper surface of the second polarizing plate 82, or the sensing electrode 72 may be formed on the lower surface of the window 190. Alternatively, the sensing electrode 72 may be formed on the upper surface of the second substrate 61 or the lower surface of the second polarizing plate 82.

  Here, the sensing electrode 72 is formed of a transparent conductive material (for example, ITO), and this is realized by attaching a film patterned with the transparent conductive material to the second polarizing plate 82 or the window 190. it can.

  Due to the arrangement of the common electrode 70 and the sensing electrode 72 that serve as driving electrodes, mutual capacitance is formed between the common electrode and the sensing electrode at points where they intersect each other. Each intersection where the mutual capacitance is formed becomes each sensing cell 100 that realizes touch recognition.

  In FIG. 4, the common electrode 70 and the sensing electrode 72 have a single bar shape, but the present invention is not limited to this, and may be formed in a diamond shape or the like.

  For example, the common electrode 70 and the sensing electrode 72 may be arranged in an orthogonal crossing manner with each other. In addition, the common electrode 70 and the sensing electrode 72 may have different geometrical configurations (concentric lines and radial lines in a polar coordinate array). ) Or the like.

  3 shows that the sensing electrode 72 is located above the second substrate 61 and the common electrode 70 is located below the second substrate 61. However, this is only one embodiment. In addition, the common electrode 70 and the sensing electrode 72 may be located on one side of the substrates 11 and 61, and may be located on the same layer or different layers.

  4 shows the case where the number of the common electrodes 70 is 60 for the sake of convenience of explanation, but the number of the common electrodes 70 can naturally be changed in various ways.

  FIG. 5 is a graph showing driving according to the first embodiment of the present invention, and FIG. 6 is a waveform diagram showing signals provided by the common electrode driving unit and the gate driving unit for the driving shown in FIG. . 5 and 6, for convenience of explanation, the case where the number of the common electrode 70 and the gate wirings G1 to Gn is 60 is shown. In this case, the 60 common electrodes 70 include the first common electrode X1 to the 60th common electrode X60, and the 60 gate lines include the first gate line G1 to the 60th gate line G60.

  The common electrode driving unit 5 simultaneously supplies a drive signal to the common electrodes included in each group of the plurality of groups of the common electrodes 70, and sequentially supplies the drive signals based on each group. At this time, the common electrode 70 can be sequentially divided to form a plurality of groups.

  The plurality of groups in which the common electrodes 70 are sequentially divided are formed so that a predetermined number of common electrodes are included in each group in order from the first common electrode. As an example, as shown in FIG. The ten common electrodes from the first common electrode X1 can be divided into groups.

  That is, the first common electrode X1 to the tenth common electrode X10 are in the first group (Group 1), the eleventh common electrode X11 to the twentieth common electrode X20 are in the second group (Group 2), and the twenty-first common electrode. From X21 to the 30th common electrode X30 is in the third group (Group 3), from the 31st common electrode X31 to the 40th common electrode X40 is in the fourth group (Group 4), from the 41st common electrode X41 to the 50th common electrode. Up to X50 is divided into the fifth group (Group 5), and from the 51st common electrode X51 to the 60th common electrode X60 is divided into the 6th group (Group 6).

  However, the number of common electrodes included in each group can be changed, and accordingly, the number of groups can be changed.

  For a plurality of groups divided in the above manner, the common electrode drive unit 5 supplies drive signals to the common electrodes included in the same group at the same time, and sequentially supplies drive signals based on each group. .

  That is, as shown in FIG. 5 and FIG. 6, among the first group (Group 1) to the sixth group (Group 6), a driving signal is simultaneously supplied to the driving electrodes included in the same group. Drive signals are sequentially supplied based on the groups from the group (Group 1) to the sixth group (Group 6). However, there may be a period in which the common voltage Vcom having the same magnitude is supplied to all the common electrodes 70 in the period in which the drive signal is supplied to each group.

  For this purpose, as shown in FIG. 4, a conductive part 120 that divides the common electrode 70 into each group by electrically connecting the common electrodes included in each group on the outside can be formed. The conductive part 120 may be formed of a transparent conductive material (ITO as an example) or other metal.

  When the conductive portion 120 is formed in this way, the number of common electrode wirings 121 that connect the common electrode 70 and the common electrode driving portion 5 is reduced.

  The common voltage Vcom is a voltage that is supplied to each common electrode 70 in order to display an image on the liquid crystal display device, and is supplied to all the common electrodes 70 except for a period in which a drive signal is supplied.

  The drive signal is for determining the touch position, and is preferably a voltage Vd higher than the common voltage Vcom.

  If the driving signal is sequentially supplied based on each group, a finger or the like touches the sensing cell 100 formed at the intersection of the common electrode included in the group to which the driving signal is supplied and the sensing electrode intersecting with the common electrode. In this case, the voltage associated with the change in mutual capacitance is sensed, so that the touch position can be sensed.

  In order to detect the position of the touch more accurately, the number of times of supplying the drive signal as described above may be increased. However, when an image is displayed by supplying a gate signal to each of the gate lines G1 to Gn, a common voltage Vcom must be supplied to the common electrode corresponding to the gate line to which the gate signal is supplied instead of the drive signal. . When the drive signal is supplied to the common electrode, the voltage of the common electrode is not the common voltage Vcom but the voltage Vd of the drive signal, thereby causing an image quality abnormality.

  For this purpose, the gate driving unit 3 according to the present embodiment sequentially supplies gate signals to the gate lines belonging to each group for each of the plurality of groups including the gate lines G1 to Gn.

  Unlike the common electrode 70 that is divided so that a predetermined number of common electrodes are sequentially included in each group, the gate wirings G1 to Gn are divided into a plurality of groups based on a certain sequence difference.

  The gate lines G1 to Gn are arranged in order from the first gate line G1 located in the first row to the Nth gate line Gn located in the last row. Defined as order difference.

  Therefore, as an example, as shown in FIGS. 5 and 6, when the case where 60 gate wirings G1 to Gn are divided so that the order difference is 3, the first group includes the first gate wiring G1 and the fourth gate wiring G1. The second group consists of the second gate line G2, the fifth gate line G5, the eighth gate line G8,..., The gate line G4, the seventh gate line G7,. The third group consists of a third gate line G3, a sixth gate line G6, a ninth gate line G9,..., A 57th gate line G57, and a 60th gate line G60. Become.

  After all, the first group is composed of 3P-2, the second group is 3P-1, and the third group is composed of gate wirings having the numbers 3P (where P is a natural number).

  However, such an order difference is not limited to 3, and can be changed to a natural number of 2 or more. The number of groups formed by changing the order difference also changes.

  The gate driver 3 sequentially supplies gate signals to the gate lines belonging to each group for each of the plurality of groups divided by the above-described method.

  When divided into three groups by the order difference 3 as in the above example, the first gate wiring G1, the fourth gate wiring G4, the seventh gate wiring G7,..., The 55th gate wiring G55, which are included in the first group, Gate signals are sequentially supplied to the 58th gate wiring G58, and the second gate wiring G2, the fifth gate wiring G5, the eighth gate wiring G8,..., The 56th gate wiring G56, the 59th included in the second group. Gate signals are sequentially supplied to the gate wiring G59, and the third gate wiring G3, sixth gate wiring G6, ninth gate wiring G9,..., 57th gate wiring G57, 60th gate wiring included in the third group. Gate signals are sequentially supplied to G60.

  The gate signal is supplied to each group in order in one frame period, so that an image of one frame can be displayed on the screen.

  It is preferable that the supply of the drive signal to each group by the common electrode drive unit 5 is alternately performed with the supply of the gate signal to each group by the gate drive unit 3.

  As a result, the number of times of the drive signal is equal to the number of groups into which the gate lines G1 to Gn are divided while applying a common voltage instead of the drive signal to the common electrode corresponding to the gate line to which the gate signal is supplied. Can increase touch sensitivity.

  FIG. 7 is a graph illustrating driving according to the second embodiment of the present invention, and FIG. 8 is a waveform diagram illustrating signals provided by the common electrode driving unit and the gate driving unit for the driving illustrated in FIG. .

  The second embodiment shown in FIGS. 7 and 8 shows a case where the gate wirings G1 to Gn are divided so as to have an order difference 2 in the first embodiment described above.

  That is, if the gate lines G1 to G60 have a difference of order 2, the first group includes the first gate line G1, the third gate line G3, the fifth gate line G4,..., The 57th gate line G57, the 59th line. The second group includes a second gate line G2, a fourth gate line G4, a sixth gate line G6,..., A 58th gate line G58, and a 60th gate line G60. Eventually, when the order difference is 2, it is divided into two groups of odd-numbered gate lines and even-numbered gate lines.

  Accordingly, the gate driver 3 sequentially supplies gate signals to the first group of odd-numbered gate wirings in one frame period, and applies the gate signals to the second group of even-numbered gate wirings. Supply sequentially.

  As in the first embodiment, the supply of the drive signal to each group by the common electrode drive unit 5 is preferably alternately performed with the supply of the gate signal to each group by the gate drive unit 3.

  FIG. 9 is a diagram showing another structure of the common electrode pattern (drive electrode) and the sensing electrode shown in FIG. FIG. 10 is a graph showing driving according to the third embodiment of the present invention. FIG. 11 is a waveform diagram illustrating signals provided by the common electrode driver and the gate driver for driving shown in FIG.

  Referring to FIGS. 10 and 11, the common electrode driving unit 5 according to the third embodiment of the present invention includes a plurality of groups in which odd-numbered common electrodes and even-numbered common electrodes are sequentially divided. A drive signal is simultaneously supplied to the common electrode included in each group, and a plurality of groups of even-numbered common electrodes are sequentially supplied with reference to each group for a plurality of groups of odd-numbered common electrodes. A drive signal is sequentially supplied with respect to each group based on each group.

  The operation of the gate driver 3 for supplying the gate signal to the gate lines G1 to Gn is the same as that of the second embodiment. However, in the third embodiment, the common electrode 70 includes an odd-numbered common electrode and an even-numbered common electrode. Each is divided sequentially. That is, a predetermined number of odd-numbered common electrodes from the first common electrode X1 which is the first common electrode among the odd-numbered common electrodes are included in each group, and among the even-numbered common electrodes, the first common electrode Each group includes an even-numbered common electrode of a predetermined number unit from the second common electrode X2.

  As an example, as shown in FIG. 10, the odd-numbered common electrode includes a first common electrode X1, a third common electrode X3, a fifth common electrode X5, a seventh common electrode X7, and a ninth common electrode X9. Group (Group 1_0), 11th common electrode X11, 13th common electrode X13, 15th common electrode X15, 17th common electrode X17, 2nd group (Group 2_0) including 19th common electrode X19, 21st common electrode X21 , The 23rd common electrode X23, the 25th common electrode X25, the 27th common electrode X27, the third group (Group 3_0) including the 29th common electrode X29, the 31st common electrode X31, the 33rd common electrode X33, the 35th common electrode X35, the 37th common electrode X37, the fourth group (Group 4_0) including the 39th common electrode X39, the 41st common electrode X41, the 43rd common electrode X43, the 45th common electrode 45, 47th common electrode X47, 5th group (Group 5_0) including 49th common electrode X49, 51st common electrode X51, 53rd common electrode X53, 55th common electrode X55, 57th common electrode X57, 59th common Divided into a sixth group (Group 6_0) including the electrode X59, the even-numbered common electrodes are the second common electrode X2, the fourth common electrode X4, the sixth common electrode X6, the eighth common electrode X8, and the tenth common electrode. A first group (Group 1_E) including X10, a twelfth common electrode X12, a fourteenth common electrode X14, a sixteenth common electrode X16, an eighteenth common electrode X18, and a twentieth common electrode X20 (Group 2_E), The third group (Group 3) including the 22nd common electrode X22, the 24th common electrode X24, the 26th common electrode X26, the 28th common electrode X28, and the 30th common electrode X30 E), a thirty-second common electrode X32, a thirty-fourth common electrode X34, a thirty-sixth common electrode X36, a thirty-eighth common electrode X38, a forty-fourth common electrode X40, a forty-second common electrode X42, a forty-fourth group. The fifth group (Group 5_E) including the common electrode X44, the 46th common electrode X46, the 48th common electrode X48, the 50th common electrode X50, the 52nd common electrode X52, the 54th common electrode X54, the 56th common electrode X56, The sixth group (Group 6_E) including the 58 common electrode X58 and the 60th common electrode X60.

  At this time, the common electrode driving unit 5 supplies a drive signal to the common electrodes included in the same group at the same time, and a plurality of groups composed of odd-numbered common electrodes and a plurality of groups composed of even-numbered common electrodes. The drive signals are sequentially supplied on the basis of each group individually.

  That is, as shown in FIGS. 10 and 11, the drive signals are sequentially supplied from the first group (Group 1_0) to the sixth group (Group 6_0), which are a plurality of groups of odd-numbered common electrodes. The driving signals are sequentially supplied from the first group (Group 1_E) to the sixth group (Group 6_E), which are a plurality of groups of even-numbered common electrodes.

  Therefore, as shown in FIG. 9, the first group (Group 1_0) to the sixth group (Group 6_0), which are a plurality of groups of odd-numbered common electrodes, and a plurality of groups of even-numbered common electrodes. Conductive portions 120 that electrically connect the common electrodes included in the first group (Group 1_E) to the sixth group (Group 6_E) on the outside may be formed.

  At this time, the driving signal is supplied to the plurality of groups including the odd-numbered common electrodes before the gate signal is supplied to the group including the odd-numbered gate wirings. It is preferable that the drive signal is supplied to the group before the gate signal is supplied to the group of even-numbered gate lines.

  That is, after driving signals are sequentially supplied from the first group (Group 1_0) to the sixth group (Group 6_0), which are a plurality of groups of odd-numbered common electrodes, the gates are connected to the odd-numbered gate lines. After the signals are sequentially supplied and the drive signals are sequentially supplied from the first group (Group 1_E) to the sixth group (Group 6_E), which are a plurality of groups of even-numbered common electrodes, Gate signals are sequentially supplied to the gate wirings.

  As described above, the most preferred embodiment of the present invention has been described. However, the present invention is not limited to the above description, and the gist of the invention described in the claims or disclosed in the specification. Of course, various modifications and changes can be made by those skilled in the art, and it is needless to say that such modifications and changes are included in the scope of the present invention.

3 Gate drive unit,
4 Data driver,
5 common electrode drive unit,
6 Timing controller,
11 First substrate,
61 second substrate,
50 pixel electrodes,
70 common electrode,
72 sensing electrodes,
90 Liquid crystal layer.

Claims (15)

A plurality of pixels respectively connected to a plurality of data lines and a plurality of gate lines divided into a plurality of groups;
A plurality of sensing electrodes;
A plurality of common electrodes divided into a plurality of groups;
For the plurality of groups of the common electrodes, a common electrode driving unit that sequentially supplies drive signals to the common electrodes included in the same group while sequentially supplying drive signals based on each group for different groups;
A plurality of groups of the gate line, sequentially seen including a gate driver for supplying a gate signal to the gate line belonging to each group for each group,
The common electrode driving unit includes:
The touch screen panel integrated liquid crystal display device , wherein the same common voltage is supplied to all the common electrodes during a period other than the period during which the drive signal is supplied . First and second substrates spaced apart from each other;
The touch screen panel integrated liquid crystal display device according to claim 1, further comprising: a liquid crystal layer formed between the first substrate and the second substrate. The sensing electrode and the common electrode, a touch screen panel integrated liquid crystal display device according to claim 2, characterized in that located on one of the different layers of the first and second substrates.   The touch screen panel integrated liquid crystal display device according to claim 1, wherein the sensing electrode and the common electrode intersect each other.   The touch screen panel-integrated liquid crystal display device according to claim 1, wherein the common electrode forms a plurality of groups that are sequentially divided.   The touch screen panel-integrated liquid crystal display device according to claim 1, wherein the gate lines form a plurality of groups divided based on a certain order difference. The drive signal is, the common voltage touch screen panel integrated liquid crystal display device according to claim 1, characterized in that it has a higher voltage than. The gate driver is
For the two groups in which the plurality of gate lines are divided into odd-numbered gate lines and even-numbered gate lines, gate signals are sequentially supplied to the gate lines belonging to the respective groups. touch screen panel integrated liquid crystal display device according to any one of claims 1-7. The common electrode driving unit includes:
Regarding a plurality of groups in which each of a plurality of odd-numbered common electrodes and a plurality of even-numbered common electrodes are sequentially divided, while supplying a drive signal to the common electrodes included in the same group at the same time, different groups Sequentially supplies a drive signal based on each group for a plurality of groups of odd-numbered common electrodes, and sequentially supplies a drive signal based on each group for a plurality of groups of even-numbered common electrodes The touch screen panel integrated liquid crystal display device according to claim 8 . The driving signal is supplied to the plurality of groups including the odd-numbered common electrodes before the gate signal is supplied to the group including the odd-numbered gate wirings, and the driving to the plurality of groups including the even-numbered common electrodes is performed. 10. The touch screen panel-integrated liquid crystal display device according to claim 9 , wherein the signal is supplied before the gate signal is supplied to the group of even-numbered gate lines. A touch screen panel including a plurality of pixels connected to a plurality of data lines and a plurality of gate lines divided into a plurality of groups, a plurality of sensing electrodes, and a plurality of common electrodes divided into a plurality of groups. A driving method of an integrated liquid crystal display device,
For a plurality of groups in which a plurality of common electrodes are sequentially divided, a drive signal is supplied simultaneously to the common electrodes included in the same group, while a drive signal is sequentially supplied to different groups based on each group. and, a plurality of groups which a plurality of gate lines is formed by divided based on certain order difference, successively seen including the step (a) supplying a gate signal to the gate line belonging to each group for each group,
In step (a),
A driving method of a liquid crystal display device integrated with a touch screen panel , wherein the same common voltage is supplied to all the common electrodes during a period other than the period during which the driving signal is supplied . The driving signal is the driving method of a touch screen panel integrated liquid crystal display device according to claim 1 1, characterized in that it has a voltage higher than the common voltage. In step (a),
So as to have a sequence difference 2, the touch screen panel as claimed in claim 1 1 or 12 a plurality of gate wirings, characterized in that it is divided into two groups of odd-numbered gate lines and even-numbered gate lines Driving method of integrated liquid crystal display device. In step (a),
For a plurality of groups in which each of a plurality of odd-numbered common electrodes and a plurality of even-numbered common electrodes are sequentially partitioned, a drive signal is simultaneously supplied to the common electrodes included in the same group, but different groups For, a plurality of groups of odd-numbered common electrodes are sequentially supplied with a drive signal based on each group, and a plurality of groups of even-numbered common electrodes are sequentially supplied with a drive signal based on each group. the driving method of a touch screen panel integrated liquid crystal display device according to claim 1, wherein the Rukoto. In step (a),
The driving signal is supplied to the plurality of groups including the odd-numbered common electrodes before the gate signal is supplied to the group including the odd-numbered gate wirings, and the driving to the plurality of groups including the even-numbered common electrodes is performed. supply signals, the driving method of the even-numbered touch screen panel integrated liquid crystal display device according to made to claims 1-4, characterized in in front of the supply of a gate signal to the group consisting of a gate wiring.

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