KR102380897B1 - Touch Display Device And Method Of Driving The Same - Google Patents

Abstract

The present invention generates an output data enable with an extended low-level section by using an input clock and input data enable, and uses the output data enable, a horizontal synchronization signal, a vertical synchronization signal, and an image signal to generate a touch control signal , a timing controller for generating a gate control signal, a data control signal, and image data; a touch driver for detecting a touch by analyzing a touch sensing signal according to the touch control signal; and generating a gate voltage using the gate control signal. A gate driving unit, a data driving unit generating a data voltage using the data control signal and the image data, and displaying an image using the gate voltage and the data voltage during a display period, and receiving the touch sensing signal during a touch period Provided is a touch display device including a touch display panel for generating an output enable, by adjusting a ratio of a display section when generating an output enable, a charging time of a data voltage is sufficiently secured, thereby improving display quality.

Description

Touch Display Device And Method Of Driving The Same

The present invention relates to a touch display device, and more particularly, to a touch display device in which a sufficient charging time of a data voltage is secured by increasing a display period in a time division method, and a method of driving the same.

In line with the information age, the display field has also developed rapidly, and in response to this, a liquid crystal display device (LCD) as a flat panel display device (FPD) with the advantages of thinness, light weight, and low power consumption. ), plasma display panel device (PDP), organic light emitting diode display device (OLED), field emission display device (FED), etc. It is rapidly replacing the cathode ray tube (CRT).

Recently, a touch display device (or a touch screen) in which a touch panel is attached to such a display panel has been in the spotlight.

The touch display device is used as an output means for displaying an image and at the same time used as an input means for receiving a user's command by touching a specific part of the displayed image. It can be divided into a method, an infrared method, an ultrasonic method, and the like.

That is, when the user touches the touch panel while viewing the image displayed on the display panel, the touch panel detects the location information of the corresponding part and compares the detected location information with the location information of the image to recognize the user's command.

The touch display device may be manufactured in the form of attaching a separate touch panel to the display panel. In particular, in recent years, for slimming portable terminals such as smart phones and tablet PCs, electrodes and wires constituting the touch panel are applied to the substrate of the display panel. There is an increasing demand for an in-cell type touch display device that is formed and integrated in the display panel.

Such an in-cell type touch display device performs image display and touch sensing by applying or detecting a signal in time division to electrodes such as a pixel electrode and a common electrode.

For example, one frame is divided into a display section and a touch section, and an image is displayed by applying a data voltage and a common voltage to the pixel electrode and the common electrode respectively during the display section, and a touch scan signal is applied to the common electrode during the touch section. The position information may be detected by analyzing the touch sensing signal of the pixel electrode.

However, in the conventional in-cell type touch display device, since only a section of 1/2 or less of one frame is used for image display, the charging time of the data voltage to the pixel electrode is insufficient, and the display quality of the image is deteriorated. It will be described with reference.

1 is a timing diagram illustrating input and output data enable used in a conventional in-cell type touch display device.

As shown in FIG. 1 , the conventional in-cell type touch display device receives input data enable (IDE) from an external system, and outputs data enable (data enable) from the received input data enable (IDE). ODE) and display an image or sense a touch in synchronization with the generated output data enable (ODE).

The input data enable (IDE) is a signal that is applied to a display panel other than a touch display panel with a period of one frame (F), and each frame (F) is an active period in which a high-level section and a low-level section are alternately repeated. (AP) and a blank section (BP) in which the low-level section is maintained.

During the active period AP, a data voltage is applied to pixels corresponding to m horizontal lines of the display panel, and one input horizontal period in which the active period AP is divided by m, the number of horizontal lines, is applied to pixels corresponding to one horizontal line. During (IH), the data voltage is applied.

For example, a data voltage may be applied to a pixel corresponding to a corresponding horizontal line from a rising time when the input data enable IDE changes from a low level to a high level to a next rising time.

However, in the conventional in-cell type touch display device, since it is necessary to display an image or sense a touch in time division using one touch display panel, the An output data enable ODE including a corresponding display period DP and a touch period TP corresponding to about 1/2 of the active period AP is generated and used for image display and touch detection.

The output data enable ODE is a signal with a cycle of one frame F for application to the touch display panel, and each frame F includes a display section DP in which a high level section and a low level section are alternately repeated; , and a touch section TP in which a low-level section is maintained.

During the display period TP, a data voltage is applied to pixels corresponding to m horizontal lines of the display panel, and one output horizontal period in which the display period DP is divided by m, the number of horizontal lines, is applied to pixels corresponding to one horizontal line. The data voltage is applied during (OH).

For example, a data voltage may be applied to a pixel corresponding to a corresponding horizontal line from a rising time when the output data enable ODE changes from a low level to a high level to a next rising time.

However, since the display period DP of the output data enable ODE corresponds to about 1/2 of the active period AP of the input data enable IDE (DP to AP/2), the output horizontal period OH ) is also about 1/2 of the input horizontal period (IH) (OH~IH/2).

In this way, since the active section AP of the input data enable IDE is halved and half is used for image display and the other half is used for touch sensing, the display section of the output data enable ODE for image display ( DP) cannot be sufficiently secured, and as a result, the data voltage is not normally charged to each pixel.

Accordingly, there is a problem in that each pixel cannot display a normal gray level, and the display quality of the in-cell type touch display device is deteriorated.

The present invention has been proposed to solve this problem, and by adjusting the ratio of the display period when generating the output enable, the charging time of the data voltage is sufficiently secured and the display quality is improved, and a method of driving the same. aim to

In addition, the present invention maintains the touch section to a minimum and adjusts the length of the low-level section of the display section when generating the output enable, so that the charging time of the data voltage is sufficiently secured without degrading the performance in touch sensing, thereby improving the display quality Another object of the present invention is to provide a touch display device and a driving method thereof.

In order to solve the above problems, the present invention generates an output data enable in which a low-level section is extended using an input clock and an input data enable, and the output data enable and a horizontal synchronization signal, a vertical synchronization signal and A timing controller for generating a touch control signal, a gate control signal, a data control signal, and image data using an image signal; a touch driver for detecting a touch by analyzing a touch sensing signal according to the touch control signal; and the gate control signal. a gate driver generating a gate voltage using Provided is a touch display device including a touch display panel that generates the touch sensing signal during a touch period.

The timing control unit includes: an input horizontal period calculator for calculating an input horizontal period using the input clock and the input data enable; and an output clock generator for generating an output clock using the input clock; a first output horizontal period calculating unit for calculating a plurality of first output horizontal periods by using the input horizontal period and the output clock; A second output horizontal period calculation unit for calculating two output horizontal periods, a storage unit for storing the plurality of ratios, a selection unit for selecting one of the plurality of second output horizontal periods, and the plurality of second outputs and an output data enable generator configured to set the low-level section using a selected one of the horizontal periods and a predetermined high-level section, and generate the output data enable.

In addition, the plurality of first output horizontal periods includes a first type of first output horizontal period corresponding to the output clock having the same counting number as the input horizontal period, and the output of a counting number corresponding to a theoretical design value. A second type of first output horizontal period corresponding to the clock and a third type of first output horizontal period corresponding to the output clock of the counting number of the average value of the input horizontal period may be included.

The second output horizontal period calculator may calculate the plurality of second output horizontal periods by multiplying the plurality of first output horizontal periods by a selected one of the plurality of ratios.

In addition, each of the plurality of ratios may have a value of 1 or more.

The output data enable generation unit may generate the output data enable by setting a value obtained by subtracting the high-level period from the selected one of the plurality of second output horizontal periods as the low-level period.

On the other hand, the present invention comprises the steps of generating an output data enable with an extended low-level section using an input data enable and an input clock, and using the output data enable, a horizontal synchronization signal, a vertical synchronization signal, and an image signal. generating a touch control signal, a gate control signal, a data control signal, and image data; analyzing a touch sensing signal according to the touch control signal to detect a touch; and using the gate control signal to generate a gate voltage. generating a data voltage using the data control signal and the image data; displaying an image using the gate voltage and the data voltage during a display period; and receiving the touch sensing signal during a touch period. It provides a method of driving a touch display device comprising the step of generating.

The generating of the output data enable in which the low-level section is extended using the input data enable and the input clock includes calculating an input horizontal period using the input data enable and the input clock. generating an output clock using the input clock; calculating a plurality of first output horizontal periods using the input horizontal period and the output clock; calculating a plurality of second output horizontal periods by using a selected one of a plurality of ratios; selecting one of the plurality of second output horizontal periods; The method may include setting the low level section using the level section and generating the output data enable.

In addition, the calculating of the plurality of second output horizontal periods by using a selected one of the plurality of first output horizontal periods and the plurality of ratios may include: the plurality of first output horizontal periods selected from among the plurality of ratios and calculating the plurality of second output horizontal periods by multiplying them by one.

And, in the setting of the low level section using the plurality of second output horizontal periods and the high level section, a value obtained by subtracting the high level section from the selected one of the plurality of second output horizontal periods is calculated as the low level section. It may include the step of setting the level section.

According to the present invention, by adjusting the ratio of the display period when generating the output enable, the charging time of the data voltage is sufficiently secured and the display quality is improved.

In addition, the present invention maintains the touch section to a minimum and adjusts the length of the low-level section of the display section when generating the output enable, so that the charging time of the data voltage is sufficiently secured without degrading the performance in touch sensing, thereby improving the display quality has the effect of being

1 is a timing diagram illustrating input and output data enable used in a conventional in-cell type touch display device.
2 is a view showing an in-cell type touch display device according to an embodiment of the present invention.
3 is a diagram illustrating a timing controller of an in-cell type touch display device according to an embodiment of the present invention.
4 is a timing diagram illustrating input and output data enable used in an in-cell type touch display device according to an embodiment of the present invention.
5 is a flowchart illustrating a method of driving an in-cell type touch display device according to an embodiment of the present invention.

Hereinafter, a touch display device according to the present invention will be described with reference to the accompanying drawings.

2 is a diagram illustrating an in-cell type touch display device according to an embodiment of the present invention.

As shown in FIG. 2 , the in-cell type touch display device 110 according to the embodiment of the present invention includes a timing controller 120 , a touch driver 130 , a data driver 140 , a gate driver 150 , and a touch screen. and a display panel 160 .

The timing controller 120 includes a plurality of horizontal synchronization signals (HSY), vertical synchronization signals (VSY), input clocks (ICLK), input data enable (IDE), etc. transmitted from an external system such as a graphic card or TV system. A touch control signal TCS, a gate control signal GCS, a data control signal DCS, and an image data RGB are generated using the timing signal and the image signal IS, and the generated touch synchronization signal TSY is generated. is transferred to the touch driver 130 , the data control signal DCS and image data RGB are transferred to the data driver 140 , and the generated gate control signal GCS is transferred to the gate driver 150 .

More specifically, the timing controller 120 generates and generates the output clock OCLK and the output data enable ODE in which the low level section is extended from the input clock ICLK and the input data enable IDE. Touch control signal (TCS), gate control signal (GCS), data control signal (DCS) using the output data enable (ODE), horizontal synchronization signal (HSY), vertical synchronization signal (VSY), and image signal (IS) ) and image data RGB, in which case the horizontal synchronization signal HSY may also be modulated to be synchronized with the output data enable ODE.

A detailed operation of the timing controller 120 will be described later.

The touch driver 130 receives the touch sensing signal TSS from the data driver 140 according to the touch control signal TCS received from the timing controller 120 during the touch period (TP in FIG. 4 ), and receives the received The touch sensing signal TSS is analyzed to detect the location information of the touch input.

The data driver 140 generates a data voltage using the data control signal DCS and the image data RGB received from the timing controller 120 during the display period (DP of FIG. 4 ), and generates the data voltage It is transmitted to the data line DL of the touch display panel 160 .

In addition, the data driver 140 receives the touch sensing signal TSS from the data line DL during the touch period (DP in FIG. 4 ), and transmits the received touch sensing signal TSS to the touch driver 130 . do.

In the embodiment of FIG. 2 , the data driver 140 receives the touch sensing signal TSS from the touch display panel 160 and transmits it to the touch driver 130 as an example, but in another embodiment, the touch driver 130 . may directly receive the touch sensing signal TSS from the touch display panel 160 .

The gate driver 150 generates a gate voltage using the gate control signal GCS received from the timing controller 120 during the display period (DP of FIG. 4 ), and applies the generated gate voltage to the touch display panel 160 . of the gate line GL.

On the other hand, the data driver 140 or the gate driver 150 transmits a common voltage to the common wiring (not shown) during the display period (DP of FIG. 4 ), and touches the common wiring during the touch period (DP of FIG. 4 ) A scan signal can be transmitted.

The touch display panel 160 displays an image using the data voltage transmitted from the data driver 140 and the gate voltage received from the gate driver 150 during the display period (DP of FIG. 4 ), and the touch period ( FIG. 4 ). 4), a touch sensing signal TSS is generated using the touch scan signal received from the data driving unit 140 or the gate driving unit 150, and the generated touch sensing signal TSS is transmitted to the data driving unit 140. transmit

To this end, the touch display panel 160 includes a gate line GL and a data line DL that cross each other to define the pixel region P, and a thin film transistor is provided on the gate line GL and the data line DL. (T) is connected, the pixel electrode PE is connected to the thin film transistor T, and a common electrode (not shown) facing the pixel electrode PE is disposed in the pixel region P.

Although not shown, when the touch display device 110 is a liquid crystal display, a liquid crystal capacitor is connected to the thin film transistor T, and when the touch display 110 is an organic light emitting diode display, the thin film transistor T has a light emitting diode. can be connected

In the touch display panel 160, the thin film transistor T is turned on according to the high level of the gate voltage of the gate wiring GL during the display period (DP in FIG. 4), and the data wiring ( DL) is applied to the liquid crystal capacitor or the light emitting diode through the thin film transistor T, and the common voltage of the common wiring is applied to the common electrode to display an image, and the touch of the common wiring during the touch period (DP in FIG. 4) The scan signal is transmitted to the common electrode, and the touch sensing signal of the pixel electrode is transmitted to the data driver 140 to sense the touch.

In such an in-cell type touch display device 110 , the timing controller 120 generates an output data enable ODE in which a low-level section is extended from an input data enable IDE, which will be described with reference to the drawings. .

3 is a diagram illustrating a timing controller of an in-cell type touch display device according to an embodiment of the present invention, and FIG. 4 shows input and output data enablement used in the in-cell type touch display device according to an embodiment of the present invention. As a timing diagram, it will be described with reference to FIG. 2 .

3 and 4 , the timing control unit 120 of the in-cell touch display device 110 according to the embodiment of the present invention includes an input horizontal period calculator 172 and an output clock generator 174 . , a first output horizontal period calculator 176 , a second output horizontal period calculator 178 , a selector 182 , and an output data enable generator 184 .

The input horizontal period calculator 172 calculates the input horizontal period IH by using the input clock ICLK and the input data enable IDE received from the external system, for example, using the input clock ICLK. The input horizontal period IH may be calculated by counting adjacent high-level sections and low-level sections of the active section AP of the input data enable IDE.

The output clock generator 174 generates an output clock OCLK using an input clock ICLK received from an external system. For example, the output clock generator 174 has a frequency twice the frequency of the input clock ICLK It is possible to generate the output clock OCLK having a period of 1/2 of the period of (ICLK).

The first output horizontal period calculator 176 uses the input horizontal period IH and the output clock OCLK received from the input horizontal period calculator 172 and the output clock generator 174 to generate a plurality of first The output horizontal period OH1's is calculated, for example, a first type of first output horizontal period OH1 corresponding to the output clock OCLK of the same counting number as the input horizontal period IH is calculated, or the storage unit Calculating the first output horizontal period OH1 of the second type corresponding to the output clock OCLK of the counting number corresponding to the theoretical design value received from 180, or the active period AP of one frame F ) divided by m, which is the number of horizontal lines, the third type of first output horizontal period OH1 corresponding to the output clock OCLK of the counting number of the average value of the input horizontal period IH may be calculated.

Here, the first type first output horizontal period OH1 may be updated for each input horizontal period IH, and the second type first output horizontal period OH1 is the touch display device 110 . It may be updated whenever the power is turned on, and the first output horizontal period OH1 of the third type may be updated every input vertical period (ie, the frame F (about 16.7 ms in the case of 60 Hz driving).

At this time, since the cycle of the output clock OCLK is 1/2 of the cycle of the input clock ICLK, each of the plurality of first output horizontal cycles OH1's may be 1/2 of the input horizontal cycle IH (OH1). ~IH/2).

The second output horizontal period calculating unit 178 uses the plurality of first output horizontal period (OH1's) and the plurality of ratios (R's) received from the first output horizontal period calculating unit 176 and the storage unit 180 . to calculate a plurality of second output horizontal periods (OH2's), for example, the first type , it is possible to calculate the second output horizontal period (OH2's) of the second and third types (OH2 to OH1*R), and for this purpose, the second output horizontal period calculation unit 178 may include a multiplier. can

At this time, each of the plurality of ratios R's may be a value of 1 or more, and as a result, the plurality of second output horizontal periods OH2's may be greater than the plurality of first output horizontal periods OH1's, respectively, and the plurality of second output horizontal periods OH1's The output horizontal period (OH2's) may be extended to a value greater than 1/2 of the input horizontal period (IH), respectively (OH2 to OH1*R to (IH/2)*R).

The storage unit 180 stores a plurality of ratios (R's) corresponding to the degree of extension of the output horizontal period, and selects one (R) of the plurality of ratios (R's) according to selection of a user or a program to the second output horizontal It is transmitted to the period calculating unit 178, for example, the storage unit 180 may be an EEPROM.

In addition, the storage unit 180 stores the counting number corresponding to the theoretical design value for calculating the first output horizontal period OH1 of the second type, and converts the counting number to the first output horizontal period calculation unit ( 176 , or the counting number corresponding to the high-level section OH2_H of the second output horizontal period OH2 may be stored, and the counting number may be transmitted to the output data enable generator 184 .

The selection unit 182 selects one OH2 from among the plurality of second output horizontal periods OH2's received from the second output horizontal period calculation unit 178, for example, according to the selection of a user or a program. One of the first type, the second type and the third type of second output horizontal period OH2's can be selected.

The output data enable generation unit 184 uses the counting number corresponding to the second output horizontal period OH2 and the high level section OH2_H received from the selection unit 182 and the storage unit 180 to output data To generate the enable ODE, for example, a section corresponding to the output clock OCLK of the counting number received from the storage unit 180 is set as the high-level section OH2_H, and the second output horizontal period OH2 ) by subtracting the high-level section OH2_H from the low-level section OH2_L (OH2_L to (OH2-OH2_H)), the output data enable ODE can be generated.

As described above, in the in-cell type touch display device 110 of the time division method according to the embodiment of the present invention, the first output horizontal period ( OH1) is multiplied by the ratio R according to the user's or program's selection to calculate an extended second output horizontal period (OH2), and the second output horizontal period (OH2) except for a predetermined high-level section (OH2_H) is set to the low level section OH2_L to generate the output data enable ODE, so the output data enable ODE according to the embodiment of the present invention is higher than the conventional output data enable (ODE in FIG. 1 ). The low level section OH2_L is extended.

Here, the high-level section OH2_H of the output data enable ODE is a time for inputting the image data RGB corresponding to one horizontal line to the data driver 140, and the output data enable ODE Since the low-level section OH2_L is a time for applying a data voltage to a pixel corresponding to one horizontal line, in the time-division type in-cell type touch display device 110 according to the embodiment of the present invention, the touch section TP is By minimizing , and extending the low-level section OH2_L of the output data enable ODE of the display section DP, the charging time of the data voltage is sufficiently secured to improve the display quality.

For example, the input data enable (IDE) has an input horizontal period (IH) corresponding to the counting number of 2200, including a high-level section corresponding to a counting number of 1920 and a low-level section corresponding to a counting number of 280 In this case, in the conventional in-cell type touch display device of FIG. 1, the output horizontal period (OH) corresponding to the counting number of 1100, which includes a high-level section corresponding to a counting number of 960 and a low-level section corresponding to a counting number of 140 An output data enable (ODE) with

However, in the in-cell type touch display device 110 according to the embodiment of the present invention, the first corresponding to the counting number of 1100 is composed of a high-level section corresponding to a counting number of 960 and a low-level section corresponding to a counting number of 140 One output horizontal period OH1 is calculated, the second output horizontal period OH2 corresponding to the counting number of 1650 is calculated by multiplying the first output horizontal period OH1 by the ratio R of 1.5, and the second output By setting the low-level section OH2_L to correspond to the counting number of 690 by subtracting the high-level section OH2_H corresponding to the predetermined counting number of 960 from the horizontal period OH2, the output data enable ODE is generated. .

Accordingly, compared to 140, which is the counting number of the low-level section of the conventional output data enable (ODE), 690, the counting number of the output data enable (ODE) of the embodiment of the present invention, is extended by about 5 times, so that the charging time of the data voltage is sufficient can be secured.

A method of driving the in-cell type touch display device 110 will be described with reference to the drawings.

5 is a flowchart for explaining a method of driving an in-cell type touch display device according to an embodiment of the present invention, which will be described with reference to FIGS. 2 to 4 together.

As shown in FIG. 5 , the input horizontal period calculating unit 172 of the timing controller 120 calculates the input horizontal period IH using the input data enable IDE and the input clock ICLK (st10). ), for example, by counting adjacent high-level sections and low-level sections of the active section AP of the input data enable IDE with the input clock ICLK, the input horizontal period IH can be calculated.

Thereafter, the output clock generator 174 of the timing controller 120 generates the output clock OCLK using the input clock ICLK (st20), for example, twice the frequency of the input clock ICLK. It is possible to generate the output clock OCLK having a frequency and having a period of 1/2 of the period of the input clock ICLK.

Thereafter, the first output horizontal period calculating unit 176 of the timing control unit 120 calculates a plurality of first output horizontal periods OH1's using the input horizontal period IH and the output clock OCLK (st30) , for example, the first output horizontal period OH1's of the first to third types may be calculated.

Thereafter, the second output horizontal period calculating unit 178 of the timing control unit 120 uses a selected one of the plurality of first output horizontal periods OH1's and the plurality of ratios R to generate a plurality of second output horizontal periods ( OH2's) is calculated (st40), for example, by multiplying the ratio R by the first output horizontal period OH1's of the first to third types, the second output horizontal period OH2's of the first to third types can be calculated.

Thereafter, the selection unit 182 of the timing control unit 120 selects one OH2 from among the plurality of second output horizontal periods OH2's (st50), for example, the first to third types of second output horizontal periods. One of the cycles (OH2's) (OH2) can be selected.

Thereafter, the output data enable generator 184 of the timing controller 120 generates the output data enable ODE using the counting number corresponding to the selected second output horizontal period OH2 and the high level section OH2_H. To generate (st60), for example, the output data enable (ODE) can be generated by setting the value obtained by subtracting the preset high level section (OH2_H) from the second output horizontal period (OH2) as the low level section (OH2_L). there is.

As described above, in the time division type in-cell touch display device 110 according to the embodiment of the present invention, the first output horizontal period corresponding to 1/2 of the input horizontal period IH of the input data enable IDE. An extended second output horizontal period (OH2) is calculated by multiplying (OH1) by a ratio (R) according to the user's or program's selection, and the second output horizontal period (OH2) excludes a predetermined high-level section (OH2_H) Since the output data enable ODE is generated by setting the remainder to the low-level section OH2_L, the output data enable ODE can extend the low-level section OH2_L.

That is, by minimizing the touch section TP and extending the low-level section OH2_L of the output data enable ODE of the display section DP, the charging time of the data voltage is sufficiently secured, so that the in-cell type touch display device 110 ) display quality is improved.

Although the above has been described with reference to the preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below You will understand that it can be done.

110: touch display device 120: timing control unit
130: touch driving unit 140: data driving unit
150: gate driver 160: touch display panel

Claims (12)

An output data enable with an extended low-level section is generated using the input clock and input data enable, and a touch control signal and a gate control signal using the output data enable, horizontal synchronization signal, vertical synchronization signal and image signal , a timing control unit for generating a data control signal and image data;
a touch driver for detecting a touch by analyzing a touch sensing signal according to the touch control signal;
a gate driver for generating a gate voltage by using the gate control signal;
a data driver for generating a data voltage by using the data control signal and the image data;
A touch display panel that displays an image using the gate voltage and the data voltage during a display period and generates the touch sensing signal during a touch period
including,
The timing control unit,
an input horizontal period calculator for calculating an input horizontal period using the input clock and the input data enable;
an output clock generator for generating an output clock by using the input clock;
a first output horizontal period calculator for calculating a plurality of first output horizontal periods by using the input horizontal period and the output clock;
a second output horizontal period calculator configured to calculate a plurality of second output horizontal periods by using a selected one of the plurality of first output horizontal periods and a plurality of ratios;
an output data enable generator configured to set the low-level section using a selected one of the plurality of second output horizontal periods and a predetermined high-level section, and generate the output data enable
A touch display comprising a.
The method of claim 1,
The timing control unit,
a storage unit for storing the plurality of ratios;
A selection unit for selecting one of the plurality of second output horizontal periods
A touch display device further comprising a.
3. The method of claim 2,
The plurality of first output horizontal periods,
a first type of first output horizontal period corresponding to the output clock having the same counting number as the input horizontal period;
a first output horizontal period of a second type corresponding to the output clock having a counting number corresponding to a theoretical design value;
A third kind of first output horizontal period corresponding to the output clock of the counting number of the average value of the input horizontal period
A touch display comprising a.
3. The method of claim 2,
The second output horizontal period calculation unit,
A touch display device configured to calculate the plurality of second output horizontal periods by multiplying the plurality of first output horizontal periods by a selected one of the plurality of ratios.
5. The method of claim 4,
Each of the plurality of ratios is a value of 1 or more.
3. The method of claim 2,
The output data enable generation unit generates the output data enable by setting a value obtained by subtracting the high-level period from the selected one of the plurality of second output horizontal periods as the low-level period.
generating an output data enable in which a low-level section is extended using the input data enable and the input clock;
generating a touch control signal, a gate control signal, a data control signal, and image data using the output data enable signal, a horizontal synchronization signal, a vertical synchronization signal, and an image signal;
detecting a touch by analyzing a touch sensing signal according to the touch control signal;
generating a gate voltage using the gate control signal;
generating a data voltage using the data control signal and the image data;
Displaying an image using the gate voltage and the data voltage during a display period and generating the touch sensing signal during a touch period
including,
generating the output data enable in which the low level section is extended using the input data enable and the input clock,
calculating an input horizontal period using the input data enable and the input clock;
generating an output clock using the input clock;
calculating a plurality of first output horizontal periods using the input horizontal period and the output clock;
calculating a plurality of second output horizontal periods using a selected one of the plurality of first output horizontal periods and a plurality of ratios;
setting the low-level section using the plurality of second output horizontal periods and a predetermined high-level section, and generating the output data enable;
A method of driving a touch display device comprising a.
8. The method of claim 7,
generating the output data enable in which the low level section is extended using the input data enable and the input clock,
selecting one of the plurality of second output horizontal periods
A method of driving a touch display device further comprising a.
9. The method of claim 8,
Calculating the plurality of second output horizontal periods using a selected one of the plurality of first output horizontal periods and the plurality of ratios includes:
and calculating the plurality of second output horizontal periods by multiplying the plurality of first output horizontal periods by a selected one of the plurality of ratios.
9. The method of claim 8,
The step of setting the low-level section using the plurality of second output horizontal periods and the high-level section includes:
and setting a value obtained by subtracting the high-level period from the selected one of the plurality of second output horizontal periods as the low-level period.
The method of claim 1,
Each of the plurality of first output horizontal periods is 1/2 of the input horizontal period, and each of the plurality of second output horizontal periods is greater than 1/2 of the input horizontal period.
4. The method of claim 3,
The first output horizontal period of the first type is updated for each input horizontal period, the first output horizontal period of the second type is updated whenever power is turned on, and the first output horizontal period of the third type is a frame A touch display device that is updated every time.

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