KR101798098B1 - Display device and method of driving the same - Google Patents

Abstract

The present invention is characterized in that odd-numbered touch electrodes included in odd-numbered MUX groups and even-numbered touch electrodes included in even-numbered MUX groups are adjacent to each other and arranged alternately and arranged in a lattice form A display device and a method of driving the same are provided.

Description

DISPLAY APPARATUS AND DRIVING METHOD THEREOF

The present invention relates to a display device in which a self-capping type touch panel is incorporated, and a driving method thereof.

The touch panel is applied to a display device such as a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting display (OLED), an electrophoretic display (EPD) And is a type of an input device that allows a user to directly touch the screen with a finger or a pen to input information while viewing the display device.

The touch panel can be independently manufactured and then attached to the panel. A display device manufactured in this manner is referred to as an add-on type display device.

Further, the touch panel may be manufactured integrally with the panel. A display device manufactured in this manner is referred to as an in-cell type display device.

In particular, in recent years, in order to make a portable terminal such as a smart phone or a tablet PC slimmer, there is an increasing demand for an in-cell type display device in which elements constituting a touch panel are built in a panel of the display device.

The method of constructing the touch panel may be classified into a self cap method and a mutual method.

In the conventional in-cell type display device incorporating a touch panel using a self cap method, when the number of the horizontal direction touch electrodes is n and the number of the vertical direction touch electrodes is m , And a total of nxm touch electrodes are provided.

1 is a diagram illustrating waveforms of touch signals applied to a conventional display device using a self-capping method.

In the in-cell type display device, the video display periods DP1 and DP2 and the touch sensing periods TP1 and TP2 are generally distinguished. Accordingly, the period assigned to the touch detection is shorter than the period assigned to the touch detection in the add-on type display device.

In addition, when the number of touch electrodes constituting the touch panel is large, the touch electrodes are divided into a plurality of groups (hereinafter, simply referred to as 'mux groups'), and touches are sequentially detected for the respective mux groups.

In this case, the touch signals MUX1G_TS to MUX4G_TS must be supplied to all the mux groups in one touch sensing period (TP1 or TP2) as shown in FIG. 1, The touch position can be judged.

Since the touch sensing periods TP1 and TP2 are limited, the period in which the touch signals MUX1G_TS to MUX4G_TS are supplied to the respective mux groups is shortened, so that the touch sensitivity can be reduced.

In particular, if the number of the mux groups is increased, the period of time in which the touch signal is supplied to each mux group is further shortened, and thus the touch sensitivity can be further reduced.

The odd numbered touch electrodes included in the odd-numbered MUX groups and the even-numbered touch electrodes included in the even-numbered MUX groups are adjacent to each other. A display device and a method of driving the same are provided in a lattice pattern.

According to an aspect of the present invention, there is provided a display device including a first mux group including two or more first odd-numbered touch electrodes, a second mux group including two or more second even-numbered touch electrodes, Between the panel having the touch panel including the third mux group including the third odd-numbered touch electrodes and the fourth mux group including the at least four fourth even-numbered touch electrodes and the nth touch sensor, Group and the third mux group sequentially, and the touch sensing unit sequentially drives the second mux group and the fourth mux group among the (n + 1) -th touch sensors. Wherein the first odd-numbered touch electrodes and the second even-numbered touch electrodes are disposed at an upper end portion of the panel, the first odd-numbered touch electrodes and the second even-numbered touch electrodes are alternately arranged in the horizontal direction and the vertical direction, The third odd-numbered touch electrodes and the fourth even-numbered touch electrodes are disposed at the lower end of the panel, and the third odd-numbered touch electrodes and the fourth even-numbered touch electrodes are alternately arranged in the horizontal direction and the vertical direction.

According to another aspect of the present invention, there is provided a method of driving a display device, including: forming first odd-numbered touch electrodes constituting a first mux group and second even-numbered touch electrodes constituting a second mux group, The first odd-numbered touch electrodes and the second even-numbered touch electrodes are arranged alternately in the horizontal and vertical directions. The third odd-numbered touch electrodes constituting the third mux group and the third odd- Wherein the fourth even-numbered touch electrodes are disposed at a lower end portion of the panel, and the third odd-numbered touch electrodes and the fourth even-numbered touch electrodes are alternately arranged in the horizontal direction and the vertical direction, And the (n + 1) -th touch sensor for the touch position determination sequentially supplies the touch signal to the first and third groups and between the touch sensors, And sequentially supplying the touch signal to the mux group and the fourth mux group.

According to the present invention, since the sensing period in which the touch signal is supplied to each of the mux groups can be increased, the touch performance can be improved.

Particularly, according to the present invention, the touch performance can be improved in a display device having a large area of the touch panel and a small touch signal size.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing waveforms of touch signals applied to a conventional display device using a self-capping method. FIG.
2 is an exemplary view showing a configuration of a display device according to the present invention;
3 is a diagram illustrating a configuration of a touch sensing unit and a touch panel applied to a display device according to the present invention.
4 is a diagram illustrating waveforms of touch signals applied to a display device according to the present invention;
5 is an exemplary diagram for explaining a display device driving method according to the present invention.
6 is a view for comparing a method of driving a display device according to the present invention and a conventional method of driving a display device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an exemplary view showing a configuration of a display device according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a display device in which a touch panel using a self-cap method and a capacitive method is built in a panel.

2, the display device according to the present invention includes a touch panel 500 having a large number of touch electrodes 510. Each of the touch electrodes 510 includes a touch electrode 510, And the touch sensing unit 600 is connected to the touch sensing unit 600 in a one-to-one correspondence.

When the number of the touch electrodes 510 is large, the touch electrodes 510 are divided into at least two groups of muxes. The touch sensing unit 600 sequentially drives the mux groups, And determines whether or not the touch electrodes 510 included in the touch panel 510 touch.

Hereinafter, as shown in Fig. 2, a touch panel 500 including four mux groups will be described as an example of the present invention. In FIG. 2, the touch electrodes denoted by reference numeral 1 represent touch electrodes included in the first mux group, the touch electrodes denoted by reference numeral 2 represent touch electrodes included in the second mux group, and the touch The electrodes represent touch electrodes included in the third mux group, and the touch electrodes indicated by reference numeral 4 represent the touch electrodes included in the fourth mux group.

The present invention can be applied to various kinds of display devices that output images using a common electrode and can sense a touch using the common electrode. However, in the following, a liquid crystal display device is described as an example of the present invention.

In the present invention, since the odd-numbered MUX groups and the even-numbered MUX groups are driven alternately, the sensing period during which the touch signal is supplied to the touch electrode can be increased, thereby improving the touch performance. 2, the odd-number mux groups are the first mux group and the third mux group, and the even-number mux groups are the second mux group and the fourth mux group.

In order to perform the above-described functions, in the present invention, as shown in FIG. 2, the touch electrodes (denoted by 1 or 3) included in the odd-numbered MUX group and the touch The electrodes (denoted by reference numeral 2 or 4) are adjacent to each other, alternately arranged, and form a lattice pattern. Hereinafter, the touch electrodes included in the odd-numbered MUX group are referred to as odd-numbered touch electrodes, and the touch electrodes included in the even-numbered MUX group are referred to as even-numbered touch electrodes.

In other words, since the odd-numbered touch electrodes and the even-numbered touch electrodes are formed in a lattice shape as shown in FIG. 2, the odd-numbered touch electrodes and the even-numbered touch electrodes can be alternately driven.

In addition, since the odd-numbered touch electrodes and the even-numbered touch electrodes are formed in a lattice form, although it is not possible to determine whether or not the touch electrodes on all the touch panels 500 are touched during one touch sensing period, The presence or absence of a touch with respect to the entire touch panel can be roughly determined during one touch detection period.

2, the display device according to the present invention includes a panel 100 including a touch panel 500 and two or more touch electrodes 510, A gate driver 200 for sequentially supplying gate pulses to the gate lines GL1 to GLg formed on the panel 100, a gate driver 200 for sequentially applying gate pulses to the panel 100, A data driver 300 for supplying data voltages to the data lines DL1 to DLd and a controller 400 for controlling the gate driver 200 and the data driver 300. In particular, odd-numbered touch electrodes included in the odd-numbered mux groups and even-numbered touch electrodes included in the even-numbered mux groups among the mux groups are adjacent to each other, arranged alternately and arranged in a lattice form . As described above, the odd-numbered touch electrodes are denoted by reference numeral 1 or 3 in Fig. 2, and the even-numbered touch electrodes are denoted by reference numeral 2 or 4 in Fig.

First, the panel 100 includes two glass substrates and a liquid crystal layer provided between the glass substrates.

The lower glass substrate of the panel 100 includes a plurality of data lines, a plurality of gate lines crossing the data lines, a plurality of thin film transistors (TFTs) formed at intersections of the data lines and the gate lines A TFT (Thin Film Transistor), a plurality of pixel electrodes for charging a data voltage to the pixel, and a touch electrode 510 for driving the liquid crystal filled in the liquid crystal layer together with the pixel electrode. The lower glass substrate is referred to as a TFT substrate.

A black matrix BM and a color filter are formed on the upper glass substrate of the panel 100. The upper glass substrate is referred to as a CF substrate.

A polarizing plate is attached to each of the TFT substrate and the CF substrate and an alignment film for setting a pretilt angle of the liquid crystal is formed on the inner surface of the CF substrate and the TFT substrates in contact with the liquid crystal. A column spacer for maintaining a cell gap of the liquid crystal layer may be formed between the TFT substrate and the CF substrate.

The present invention relates to a display device in which touch electrodes 510 constituting the touch panel 500 are included in the panel 100 as described above.

Next, the touch panel 500 senses whether the user touches the touch panel 500. Particularly, the touch panel 500 according to the present invention uses a self-cap type capacitance . The touch panel 500 includes a plurality of touch electrodes 510 and a plurality of touch electrode lines 520.

Each of the plurality of touch electrodes 510 may be formed over a plurality of pixels formed on the panel 100. The touch electrodes 510 detect whether the touch electrode 510 is touched by using the touch signal supplied from the touch sensing unit 600 during a touch sensing period, And functions to drive the liquid crystal together with the pixel electrode.

One end of each of the plurality of touch electrode lines 520 is connected to the touch electrode 510 and the other end is connected to the touch sensing unit 600.

The number of the touch electrodes 510 can be variously set according to the size and shape of the touch panel 500.

The touch electrodes may be divided into a plurality of mux groups. FIG. 2 illustrates a touch panel 500 that is divided into four groups of muxes. For example, in FIG. 2, the touch electrodes indicated by reference numeral 1 are provided in the first mux group, the touch electrodes indicated by reference numeral 2 are provided in the second mux group, and the touch electrodes indicated by reference numeral 3 are provided in the third mux group. And the touch electrodes indicated by reference numeral 4 are provided in the fourth mux group.

Also, in the example shown in FIG. 2, the first and third groups are included in the odd-numbered groups, and the second and fourth groups are included in the even-numbered groups.

In the example shown in FIG. 2, the touch electrodes included in the first and third mux groups are referred to as odd-numbered touch electrodes, and the touch electrodes included in the second and fourth mux groups are even-numbered touch electrodes do. In particular, the touch electrodes included in the first mux group are referred to as first odd touch electrodes, the touch electrodes included in the second mux group are referred to as second even-numbered touch electrodes, Are referred to as third odd-numbered touch electrodes, and the touch electrodes included in the fourth mux group are referred to as fourth even-numbered touch electrodes.

In this case, the odd-numbered touch electrodes and the even-numbered touch electrodes are adjacent to each other, alternately arranged, and arranged in a lattice form.

For example, an odd-numbered touch electrode indicated by reference numeral 1 is adjacent to an even-numbered touch electrode indicated by reference numeral 2 or 4, and an odd-numbered touch electrode indicated by reference numeral 3 is indicated by reference numeral 2 or 4 The even-numbered touch electrode indicated by reference numeral 2 is adjacent to the odd-numbered touch electrode indicated by reference numeral 1 or 3, and the even-numbered touch electrode indicated by reference numeral 4 is adjacent to the even- Quot; 1 " or " 3 ".

The odd-numbered touch electrodes indicated by reference numeral 1 and the even-numbered touch electrodes indicated by reference numeral 2 are arranged alternately in the horizontal direction and the vertical direction. An odd-numbered touch electrode indicated by reference numeral 3 and a reference numeral 4 The even-numbered touch electrodes are alternately arranged in the horizontal direction and the vertical direction.

In addition, two odd-numbered touch electrodes denoted by reference numeral 1 and two even-numbered touch electrodes denoted by reference numeral 2 are arranged in a lattice or a quadrangular form, and the odd-numbered touch electrodes denoted by reference numeral 1, The even-numbered touch electrodes indicated by reference numeral 2, the odd-numbered touch electrodes indicated by reference numeral 3, and the even-numbered touch electrodes indicated by reference numeral 4 are arranged in the form of a lattice or a rectangle, and two The odd-numbered touch electrodes and the two even-numbered touch electrodes denoted by reference numeral 4 are arranged in a lattice or a square.

Next, in the video output period, the data driver 300 converts the video data input from the controller 400 into an analog data voltage, and supplies the analog data voltage to the gate line GL every one horizontal period And supplies data voltages of one horizontal line to the data lines. For example, the data driver 300 may convert the image data into a data voltage by using gamma voltages supplied from a gamma voltage generator (not shown), and then, during the image output period, Data line.

Next, the gate driver 200 shifts a gate start pulse transmitted from the control unit 400 according to a gate shift clock, sequentially shifts the gate lines GL1 to GLg, The gate pulses are sequentially supplied to the gate electrodes. By the gate pulse, the switching transistor provided in each of the pixels is turned on.

The gate driver 200 supplies a gate off signal to the gate lines GL1 to GLg for the remaining period when the gate pulse is not supplied. By the gate off signal, the switching transistor is turned off.

The control unit 400 receives a timing signal such as a data enable signal DE and a dot clock signal CLK from an external system so as to control the operation timing of the data driver 300 and the gate driver 200 And generates control signals (GCS, DCS) In addition, the controller 400 rearranges the input image data input from the external system and outputs the rearranged image data to the data driver 300.

The controller 400 may generate a touch control signal for controlling the operation timing of the input and output of the touch sensing unit 600 and transmit the touch control signal to the touch sensing unit 600.

The touch control signal may be a touch synchronizing signal (TSS) for distinguishing the video output period and the touch sensing period.

The touch sensing unit 600 may distinguish the video output period from the touch sensing period according to the touch synchronization signal TSS.

Lastly, the touch sensing unit 600 sequentially supplies touch signals to the mux groups included in the odd-numbered MUX groups among the n-th touch sensors, and the even- The touch signals are sequentially supplied to the mux groups included in the mux groups. Here, n is a natural number.

To be more specific, the touch sensing unit 600 supplies touch signals only to the odd-numbered touch electrodes included in the odd-numbered mux groups among the n-th touch detectors. In this case, the touch sensing unit 600 sequentially supplies the touch signals to the mux groups included in the odd-numbered mux groups.

For example, when the n-th touch sensing period is reached, first, the touch signals are supplied to the touch electrodes included in the first mux group, and then the touch signals are supplied to the touch electrodes included in the third mux group And supplies the touch signals.

Also, the touch sensing unit 600 supplies touch signals only to the even-numbered touch electrodes included in the even-numbered MUX groups among the (n + 1) -th touch sensors. In this case, the touch sensing unit 600 sequentially supplies the touch signals to the mux groups included in the even-numbered mux groups.

For example, when the n + th touch sensing period is reached, first, touch signals are supplied to the touch electrodes included in the second mux group, and then the touch signals are supplied to the touch electrodes included in the fourth mux group And supplies the touch signals.

In the touch sensing period, the touch sensing unit 600 supplies the touch signals to the touch electrodes, and receives sensing signals from the touch electrodes. The touch sensing unit 600 converts the sensing signals into digital sensing signals. The touch sensing unit 600 may transmit the digital sensed signals to a component that determines presence or absence of a touch on the touch panel and a touch position, You can judge.

The touch sensing unit 600 may be configured independently as shown in FIG. However, the touch sensing unit 600 may be included in the data driver 300 or may be included in the controller 400.

The specific configuration and function of the touch sensing unit 600 will be described in detail below with reference to FIGS. 3 to 5. FIG.

FIG. 3 is a diagram illustrating a configuration of a touch sensing unit and a touch panel applied to a display device according to the present invention, and FIG. 4 is a diagram illustrating waveforms of touch signals applied to a display device according to the present invention. Since the structure of the touch panel 500 is the same as that described above, the detailed description of the touch panel 500 is omitted.

As described above, the touch sensing unit 600 sequentially supplies the touch signals to the mux groups included in the odd-numbered MUX groups among the n-th touch sensors, and the The touch signals are sequentially supplied to the mux groups included in the even-numbered mux groups.

3, the touch sensing unit 600 includes a driver 610 for supplying a touch signal to the touch panel 500 and receiving a sensing signal from the touch panel 500, The odd-numbered MUX groups and the even-numbered MUX groups are alternately connected to the driving unit 610, and the MUX groups included in the odd-numbered MUX groups are sequentially transmitted to the driving unit 610 And a touch controller 640 for controlling the switching unit 620 and the switching unit 620 to sequentially connect the mux groups included in the even-numbered mux groups to the driving unit 610.

First, the driving unit 610 supplies a touch signal to the touch panel 500, and receives a sensing signal from the scrolling touch panel 500.

For example, when the driving unit 610 is connected to the touch electrodes included in the first mux group through the switching unit 620 during the first touch sensing period TP1, the driving unit 610 As shown in FIG. 4, the first touch signal MUX1G_TS is supplied to the touch electrodes of the first mux group, and the sensing signals are received from the touch electrodes of the first mux group. The sensing signals received from the touch electrodes are analog signals.

When the driving unit 610 is connected to the touch electrodes of the third mux group through the switching unit 620 during the first touch sensing period TP1, 4, the third touch signal MUX3G_TS is supplied to the touch electrodes of the third mux group, and the sensing signals are received from the touch electrodes of the third mux group.

When the driving unit 610 is connected to the touch electrodes of the second mux group through the switching unit 620 during the second touch sensing period TP2, 4, the second touch signal MUX2G_TS is supplied to the touch electrodes of the second mux group, and the sensing signals are received from the touch electrodes of the second mux group.

When the driving unit 610 is connected to the touch electrodes of the fourth mux group through the switching unit 620 during the second touch sensing period TP2, 4, the fourth touch signal MUX4G_TS is supplied to the touch electrodes of the fourth mux group, and the sensing signals are received from the touch electrodes of the fourth mux group.

In this case, the driving unit 610 may include four drivers 611. In other words, the number of the drivers 611 for transmitting the sensing signal after receiving the touch signal to the touch electrodes may be the same as the number of the touch electrodes due to a problem of process or manufacturing cost none.

Accordingly, the touch electrodes are divided into a plurality of mux groups, each mux group is sequentially connected to the driving unit 610, and the touch electrodes included in one mux group are connected to the drivers 611 one by one 1 so that the detection signals can be received through the drivers.

To be more specific, each of the drivers 611 supplies a touch signal to the touch electrode and receives a sensing signal from the touch electrode.

The driving unit 600 may further include components for converting an analog type sensing signal received from the drivers into a digital sensing signal.

Also, the driving unit 600 may directly determine whether the touch panel 500 is touched or touched by using the digital sensing signal, and may determine whether the touch panel 500 touches the touch panel 500, It is also possible to transmit the sensing signal of the digital form to a separate component that can determine the touch position.

Second, the switching unit 620 sequentially connects the mux groups to the driving unit 610 according to a mux group selection signal transmitted from the touch controller 640.

In this case, the touch electrodes provided in one mux group are connected to the driving unit 610 through the switching unit 620 at the same time. Accordingly, the touch electrodes included in one mux group receive simultaneously touch signals having the same size from the driver 610, and transmit the analog sense signals to the driver 610.

3, the switching unit 620 may include four signal lines MUX1GL to MUX2GL connected to the touch controller 640, a plurality of signal lines MUX1GL to MUX2GL, A touch electrode line (TL) connecting the driver (611) to the touch electrode line (TL), a control electrode connected to the touch electrode line (TL), turned on by a control signal transmitted from one of the signal lines And transistors (T1 to T4) for electrically connecting the driver.

In this case, each of the drivers 611 is connected to the four MUX groups through four touch electrode lines.

For example, among the four drivers shown in FIG. 3, the first driver from the left is connected to the touch electrode of the first mux group through the first transistor T1 through the fourth transistor T4, Electrode, the touch electrode of the third mux group, and the touch electrode of the fourth mux group. Also, the second driver may also be connected to the touch electrode of the first mux group, the touch electrode of the second mux group, the touch electrode of the third mux group, and the touch electrode of the fourth mux group through the first transistor (T1) to the fourth transistor (T4) Of the touch electrode.

Accordingly, when the touch controller 640 transmits a control signal to the first signal line MUX1GL in the first touch sensing period TP1 shown in FIG. 4, So that only the touch electrodes (denoted by reference numeral 1 in Fig. 3) included in the first mux group are connected to the drivers.

When the touch controller 640 transmits a control signal to the third signal line MUX3GL in the first touch sensing period TP1, the touch electrode lines connected to the third transistor T3 are turned on, Only the touch electrodes (indicated by reference numeral 3 in Fig. 3) included in the three-mux group are connected to the drivers.

When the touch controller 640 transmits a control signal to the second signal line MUX2GL in the second touch sensing period TP2, the touch electrode lines connected to the second transistor T2 are turned on, Only the touch electrodes (indicated by reference numeral 2 in Fig. 3) included in the two-mux group are connected to the drivers.

When the touch controller 640 transmits a control signal to the fourth signal line MUX4GL in the second touch sensing period TP2, the touch electrode lines connected to the fourth transistor T4 are turned on, Only the touch electrodes (indicated by reference numeral 1 in Fig. 3) included in the four-mux group are connected to the drivers.

FIG. 5 is a diagram illustrating a method of driving a display device according to the present invention. FIG. 5 (a) shows a touch panel to which a touch signal is supplied to odd-numbered touch electrodes provided in odd-numbered mux groups, And the touch signal is supplied to the even-numbered touch electrodes included in the even-numbered mux groups. Hereinafter, a method of driving a display device according to the present invention will be described with reference to Figs. 2 to 5. Fig. In the following description, the same or similar contents as those described above are omitted or briefly described.

The display device driving method according to the present invention is executed in the display device described with reference to Figs.

Therefore, odd-numbered touch electrodes included in the odd-numbered MUX groups and even-numbered touch electrodes included in the even-numbered MUX groups among the MUX groups constituting the touch panel 500 are adjacent to each other, , And arranged in a lattice form.

First, a touch signal is sequentially supplied to the mux groups included in the odd-numbered MUX groups among the n-th touch sensors.

First, the touch electrodes included in the first mux groups are connected to the driving unit 610 through the switching unit 620 shown in FIG. Accordingly, a touch signal is supplied to the touch electrodes included in the first mux groups (denoted by reference numeral 1 in FIG. 5 (a)) and the touch electrodes included in the first mux groups .

Next, the touch electrodes included in the third mux groups are connected to the driving unit 610 through the switching unit 62 shown in FIG. Accordingly, a touch signal is supplied to the touch electrodes included in the third mux groups (indicated by reference numeral 3 in FIG. 5 (a)), and the touch electrodes included in the third mux groups .

Therefore, it is determined whether or not the touch electrode included in the odd groups among the touch panels shown in FIG. 5A is touched between the n-th touch sensors.

In this case, it is not possible to determine whether or not the touch electrodes of the touch panel are touched. However, as shown in (a) of FIG. 5, have.

Second, a touch signal is sequentially supplied to mux groups included in the even-numbered mux groups among the (n + 1) -th touch sensors.

First, the touch electrodes included in the second mux groups are connected to the driving unit 610 through the switching unit 620 shown in FIG. Accordingly, a touch signal is supplied to the touch electrodes included in the second mux groups (indicated by reference numeral 2 in FIG. 5 (b)), and the touch signals included in the second mux groups .

Next, the touch electrodes included in the fourth mux groups are connected to the driving unit 610 through the switching unit 62 shown in FIG. Accordingly, a touch signal is supplied to the touch electrodes included in the fourth mux groups (indicated by reference numeral 4 in FIG. 5 (b)), and the touch electrodes included in the fourth mux groups .

Therefore, it is determined whether the touch electrode included in the even-numbered groups among the touch panels shown in (b) of FIG. 5 is touched between the (n + 1) -th touch sensors.

In this case, the presence or absence of touch of all the touch electrodes provided on the touch panel can not be determined. However, as shown in (b) of FIG. 5, have.

When the n-th touch sensing period and the (n + 1) -th touch sensing period have elapsed, it is possible to determine whether all the touch electrodes provided on the touch panel are touched.

In other words, the odd-numbered touch electrodes and the even-numbered touch electrodes are adjacent to each other and are alternately arranged, and the two odd-numbered touch electrodes and the two even-numbered touch electrodes adjacent to each other are arranged in a lattice form And the density of the odd-numbered touch electrodes in the panel and the density of the touch electrodes are the same in all the positions of the panel.

Accordingly, in a single touch sensing period, it is possible to determine whether there is a rough touch on the entire surface of the touch panel. Also, the sensing period in which the touch signal is supplied to each of the mux groups can be increased, thereby improving the touch performance.

FIG. 6 is a diagram comparing a method of driving a display device according to the present invention and a conventional method of driving a display device. Particularly, FIG. 6A is a diagram illustrating an example of a conventional method of driving a display device, Fig. 2 is a diagram for explaining a method of driving a display device according to a first embodiment of the present invention;

As described in the related art, in the conventional method of driving the display device, it is determined whether or not all touch electrodes included in all the MUX groups are touched during one touch sensing period.

Accordingly, as shown in (a), the touch signals MUX1G_TS to MUX4G_TS are sequentially supplied to all the MUX groups.

However, in the method of driving a display device according to the present invention, only the touching of the odd-numbered touch electrodes included in the odd-numbered MUX groups is judged during one touch sensing period, Only the presence or absence of touch is judged.

Accordingly, when the same mux groups are provided on the touch panel and the size of one touch sensing period TP1 or TP2 is the same, in the conventional display device driving method, four mux groups The touch signals must be sequentially supplied to the two mux groups, and in the method of driving the display device according to the present invention, the touch signals must be sequentially supplied to the two mux groups.

Accordingly, the sensing period in which the touch signal is supplied to each of the mux groups in the display device according to the present invention may be longer than the sensing period in which the touch signal is supplied to the respective mux groups in the conventional display device.

In the present invention, as described above, since the sensing period in which the touch signal is supplied is lengthened, the touch sensitivity can be improved.

The present invention described above is briefly summarized as follows.

According to the present invention, a plurality of mux groups constituting the touch panel are divided into odd-numbered mux groups and even-numbered mux groups, and odd-numbered mux groups and even-numbered mux groups are alternately driven to detect touch .

According to the present invention, since only the odd-numbered MUX groups or the even-numbered MUX groups are driven to detect the touch during one touch sensing period, the sensing period for sensing the touch can be increased, .

In particular, the present invention is more effective for a display device having a large area of a touch panel and a large number of touch electrodes.

In order to apply the above driving method, in the display device according to the present invention, the odd-numbered touch electrodes included in the odd-numbered MUX group and the even-numbered touch electrodes included in the even-numbered MUX group are adjacent to each other, Arranged in a lattice form.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: panel 200: gate driver
300: data driver 400:
500: touch panel 600: touch sensing part

Claims (6)

A second mux group including two or more first odd touch electrodes, a second mux group including two or more second even touch electrodes, a third mux group including two or more third odd touch electrodes, A touch panel including a fourth mux group including the fourth even-numbered touch electrodes; And
The touch sensing unit sequentially drives the first and third mux groups between the nth touch sensors and sequentially drives the second and fourth mux groups between the (n + 1) th touch sensors. Including,
The first odd-numbered touch electrodes and the second even-numbered touch electrodes are disposed at an upper end of the panel,
The first odd-numbered touch electrodes and the second even-numbered touch electrodes are arranged alternately in the horizontal direction and the vertical direction,
The third odd-numbered touch electrodes and the fourth even-numbered touch electrodes are disposed at a lower end of the panel,
Wherein the third odd-numbered touch electrodes and the fourth even-numbered touch electrodes are alternately arranged in the horizontal direction and the vertical direction. The method according to claim 1,
The first odd-numbered touch electrodes and the second even-numbered touch electrodes are adjacent to each other along a direction in which the gate lines provided at the upper end of the panel extend, and are alternately arranged. And the second even-numbered touch electrodes are adjacent to each other along a direction in which the data lines provided in the panel are extended, and are alternately disposed,
The third odd-numbered touch electrodes and the fourth even-numbered touch electrodes are adjacent to each other along a direction in which the gate lines provided at the lower end of the panel extend, and are alternately arranged. And the fourth even-numbered touch electrodes are adjacent to each other along a direction in which the data lines extend, and are alternately arranged. The method according to claim 1,
The touch sensing unit includes:
A driving unit for supplying a touch signal to the touch panel and receiving a sensing signal from the touch panel; And
Wherein the first and the third mux groups are sequentially connected to the driving unit among the nth touch sensors and the second mux group and the fourth mux group are sequentially connected between the nth touch sensors, And a switching unit connected to the driving unit. The method of claim 3,
The touch signal is simultaneously supplied to the first odd-numbered touch electrodes constituting the first mux group,
The touch signals are simultaneously supplied to the second even-numbered touch electrodes constituting the second mux group,
The touch signal is simultaneously supplied to the third odd-numbered touch electrodes constituting the third mux group,
And the touch signals are simultaneously supplied to the fourth even-numbered touch electrodes constituting the fourth mux group. The first odd-numbered touch electrodes constituting the first mux group and the second even-numbered touch electrodes constituting the second mux group are disposed at the upper end of the panel, and the first odd-numbered touch electrodes and the second even- The third odd-numbered touch electrodes constituting the third mux group and the fourth even-numbered touch electrodes constituting the fourth mux group are arranged at the lower end of the panel, Electrodes and the fourth even-numbered touch electrodes are alternately arranged in the horizontal direction and the vertical direction. In the display device of the nth touch sensor for determining the touch position, the first and second even- Supplying a touch signal to the touch panel; And
And sequentially supplying a touch signal to the second mux group and the fourth mux group among the (n + 1) -th touch sensor for touch position determination. 6. The method of claim 5,
The touch signal is simultaneously supplied to the first odd-numbered touch electrodes constituting the first mux group,
The touch signals are simultaneously supplied to the second even-numbered touch electrodes constituting the second mux group,
The touch signal is simultaneously supplied to the third odd-numbered touch electrodes constituting the third mux group,
And the touch signals are simultaneously supplied to the fourth even-numbered touch electrodes constituting the fourth mux group.

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