KR102135919B1 - Display having a touch sensor and Driving Method of the same - Google Patents

Abstract

The present invention is a display panel generated by alternating the display section and the touch scan section; A gate driver supplying a gate signal for displaying or updating a data signal on the display panel; And a touch sensor circuit unit that supplies and scans a sensing pulse for sensing touch sensors of the display panel, wherein the touch sensor circuit units include M touch sensors per area of the display panel (M is an integer of 2 or more). Grouped in block units of N and N (N is an integer greater than or equal to 2) times during one frame, but non-sequential scan in M blocks to overlap the scan direction in which the gate signal of the display panel is supplied It provides a display device having a touch sensor, characterized in that.

Description

Display having a touch sensor and driving method of the same

An embodiment of the present invention relates to a display device having a touch sensor and a driving method thereof.

According to the trend of lightening and slimming of home appliances or portable information devices, user input means are being replaced by touch sensors in button-type switches. Accordingly, a recently released display device has a plurality of touch sensors (or touch screens).

Among the display devices having a touch sensor, there is a method in which a touch sensor circuit unit charges each touch sensor and measures a charge increase/decrease according to the presence or absence of a touch to determine whether or not there is a touch.

Recently, thanks to the development of technology, a display device having a touch sensor in which a touch sensor is implemented inside but not outside of the display panel has also been proposed. As described above, a method of implementing a touch sensor inside the display panel is defined as an in-cell method.

A display device having an in-cell touch sensor shares a part of an electrode formed inside the display panel. In addition, a part of the display section for displaying or updating the data signal is allocated as a touch scan section for sensing presence or absence of a touch.

A display device having an in-cell type touch sensor proposed in the related art supplies a pulse for touch sensing from an upper direction of the display panel to a lower direction or from a lower direction of the display panel during the touch scan period.

Since the display section and the touch scan section of the display device having the in-cell touch sensor proposed in the prior art alternate, a touch scan is performed twice during one frame when a driving frequency of 120 Hz is implemented. In this case, a display device having a touch sensor of the in-cell type proposed in the related art necessarily overlaps a block for performing a touch scan and a block for displaying or updating a data signal.

In an area where overlap occurs between a block performing a touch scan and a block displaying or updating a data signal, noise corresponding to a pen touch threshold level is generated as if a display panel was touched with a pen. Therefore, a display device having a touch sensor of the in-cell type proposed in the related art has a problem that noise corresponding to a pen touch threshold level is generated, and thus the signal-to-noise ratio (SNR) is lowered.

The present invention for solving the above-described problems of the background technology prevents and improves a problem that noise corresponding to a pen touch threshold level, such as touching a display panel with a pen, improves the signal-to-noise ratio (SNR). It is to provide a display device having a touch sensor that can be improved and a driving method thereof.

The present invention as a means for solving the above-described problem is a display panel generated by alternating a display section and a touch scan section; A gate driver supplying a gate signal for displaying or updating a data signal on the display panel; And a touch sensor circuit unit that supplies and scans a sensing pulse for sensing touch sensors of the display panel, wherein the touch sensor circuit units include M touch sensors per area of the display panel (M is an integer of 2 or more). Grouped in block units of N and N (N is an integer greater than or equal to 2) times during one frame, but non-sequential scan in M blocks to overlap the scan direction in which the gate signal of the display panel is supplied It provides a display device having a touch sensor, characterized in that.

The touch sensor circuit unit may perform the touch scan N times in the same or the same scan sequence.

The touch sensor circuit unit may scan in ascending or descending order in each block unit.

The touch sensor circuit unit performs the first touch scan and the second touch scan twice during the first frame, wherein the first touch scan and the second touch scan have the same scan sequence, and in the M block units. A non-sequential scan may be performed, but an ascending or descending scan may be performed in the order of the lower region, the central region, and the upper region of the display panel.

The touch sensor circuit unit performs the first touch scan and the second touch scan twice during the first frame, wherein the first touch scan and the second touch scan have the same scan sequence, and in the M block units. A non-sequential scan is performed, but ascending or descending scans may be performed in the order of the center region, the lower region, and the upper region of the display panel.

The touch sensor circuit unit performs the first touch scan and the second touch scan twice during the first frame, wherein the first touch scan and the second touch scan have the same scan sequence, and in the M block units. A non-sequential scan may be performed, but an ascending or descending scan may be performed in the order of the lower region, the upper region, and the central region of the display panel.

In another aspect, the present invention is a method for driving a display device having touch sensors grouped by M (M is an integer greater than or equal to 2) block units for each area of the display panel in which the touch sensors are displayed. A display section step of supplying a signal; And a touch scan interval step of supplying and scanning a sensing pulse for sensing touch sensors, wherein the touch scan interval step is performed over N times (N is an integer of 2 or more) for 1 frame. Provided is a method of driving a display device having a touch sensor, characterized in that it is performed non-sequentially in the M block units so as not to overlap the scan direction in which the gate signal is supplied.

The touch scan interval step may be performed over the N times with the same or the same scan sequence.

The touch scan interval step may be performed in ascending or descending order for each block unit.

The touch scan interval step performs the first touch scan and the second touch scan twice during the first frame, wherein the first touch scan and the second touch scan have the same or the same scan sequence, and the M It is performed out of sequence in units of blocks, and may be performed in ascending or descending order for each region of the display panel.

The present invention removes an area overlapped between a block that performs a touch scan and a block that displays or updates a data signal, and generates a noise corresponding to a pen touch threshold level, such as touching a display panel with a pen. It has the effect of preventing and improving. In addition, the present invention has the effect of preventing and improving noise generation to improve the signal-to-noise ratio (SNR).

1 is a schematic block diagram of a display device having a touch sensor according to a first embodiment of the present invention.
2 is a waveform diagram showing a time division driving method of a display section and a touch scan section.
3 is a waveform diagram showing a touch sensing pulse and a touch scan method of a touch scan section.
4 and 5 are diagrams for explaining a problem of a display device having a conventional touch sensor.
6 and 7 are diagrams for describing a touch scan concept of a display device having a touch sensor according to a first embodiment of the present invention.
8 is a view for explaining a touch scan concept of a display device having a touch sensor according to a second embodiment of the present invention.
9 is a view for explaining the concept of a touch scan of a display device having a touch sensor according to a third embodiment of the present invention.
10 is a view for explaining a touch scan concept of a display device having a touch sensor according to a fourth embodiment of the present invention.
11 is a view for explaining a touch scan concept of a display device having a touch sensor according to a fifth embodiment of the present invention.
12 is a view for explaining a touch scan concept of a display device having a touch sensor according to a sixth embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, specific content for the practice of the present invention will be described.

<First Example>

1 is a schematic block diagram of a display device having a touch sensor according to a first embodiment of the present invention, FIG. 2 is a waveform diagram showing a time division driving method of a display section and a touch scan section, and FIG. 3 is a touch scan It is a waveform diagram showing the pulse for touch sensing and the touch scan method of the section.

1 to 3, a display device having a touch sensor according to a first embodiment of the present invention includes a host system 100, a timing controller 120, a gate driver 130, and a data driver 140 , A touch sensor circuit unit 160 and a display panel 110 are included.

The host system 100 outputs a timing signal such as a vertical synchronization signal (Vsync), a horizontal synchronization signal (Hsync), a data enable signal (DE), a main clock (MCLK), as well as a data signal (DATA) supplied from the outside. do. The host system 100 interoperates with the touch sensor circuit unit 160 to execute an application program indicated by a coordinate value of a touch position output from the touch sensor circuit unit 160.

The timing controller 120 uses a timing signal such as a vertical synchronization signal (Vsync), a horizontal synchronization signal (Hsync), a data enable signal (DE), and a main clock (MCLK) supplied from the host system 100. Timing control signals for controlling the operation timing of the 130 and the data driver 140 are generated. The timing control signal of the gate driver 130 includes a gate start pulse (GSP), a gate shift clock (GSC), a gate output enable signal (Gate Output Enable, GOE), and the like. The timing control signal of the data driver 140 includes a source sampling clock (SSC), a polarity control signal (Polarity, POL), and a source output enable signal (SOE).

The timing controller 120 generates an internal data enable signal iDE based on the data enable signal DE supplied from the host system 100 as shown in FIG. 2. And the timing control unit 120 based on the internal data enable signal (iDE), at least two display periods (DSP[n], DSP[n+1]) and two touch scan periods (TS[n) ], TS[n+1]) to generate a touch sync signal Tsync. That is, in the display device having the touch sensor according to the first embodiment of the present invention, since the display section and the touch scan section alternate, two touch scans are performed during one frame when a driving frequency of 120 Hz is implemented. Therefore, an image is displayed on the display panel 110 as the gate driver 130 and the data driver 140 are driven during the display period DSP[n] and DSP[n+1]. On the other hand, as the touch sensor circuit 160 is driven during the touch scan periods TS[n] and TS[n+1], the touched position on the display panel 110 is detected.

The gate driver 130 supplies a gate signal (or scan pulse) through the gate lines G1 to Gn. The gate signal is generated by a pulse swinging between the voltage of the gate high signal (hereinafter referred to as the gate high voltage) and the voltage of the gate low signal (hereinafter referred to as the gate low voltage). The gate driver 130 outputs the gate high voltage during the display period DSP[n], DSP[n+1] and the gate low voltage during the touch scan period TS[n], TS[n+1]. do.

The data driver 140 supplies a data signal DATA (or data voltage) through the data lines D1 to Dm. The data driving unit 140 latches digital video data DATA input from the timing control unit 120 and converts it into an analog positive/negative gamma compensation voltage to display sections (DSP[n], DSP[n+1]) While outputting it as an analog video data signal (DATA).

The display panel 110 displays an image in response to the gate signal supplied through the gate lines G1 to Gn and the data signal DATA supplied through the data lines D1 to Dm. The display panel 110 is formed of a liquid crystal display device or a device having a similar structure or function. The liquid crystal display device includes a liquid crystal layer formed between a transistor substrate and a color filter substrate. Data lines D1 to Dm, gate lines G1 to Gn, sensor lines Tx1 to Txn, a pixel electrode, and a common electrode are formed on the transistor substrate, and a color filter layer, an overcoating layer, etc. are formed on the color filter substrate. It is formed.

The sensor lines Tx1 to Txn formed on the display panel 110 form touch sensors in a form shared with other electrodes. That is, the display device according to the first embodiment of the present invention is implemented by an in-cell touch method in which a touch sensor of a self-capacitance type is formed in the display panel 110.

The touch sensor circuit unit 160 is electrically connected to touch sensors formed on the display panel 110 through sensor lines Tx to Txn. The touch sensor circuit unit 160 charges the touch sensors in response to the touch synchronization signal Tsync supplied from the timing controller 120 and senses the increase or decrease of the voltage according to the presence or absence of the touch to determine whether there is a touch.

The touch sensor circuit unit 160 supplies touch sensing pulses (Tx bursts) to the touch sensors formed on the display panel 110 during the touch scan periods TS[n] and TS[n+1] as shown in FIG. 3. do. The touch sensor circuit unit 160 is N times (N is an integer of 2 or more) for 1 frame to sense the touch sensors formed on the display panel 110 during the touch scan period (TS[n], TS[n+1]). The touch scan is driven across. For convenience of description, it will be described as an example that the touch sensor circuit unit 160 drives a 1st touch scan and a 2nd touch scan twice during one frame.

Hereinafter, a display device having a conventionally proposed touch sensor and a display device having a touch sensor according to the first embodiment of the present invention will be described. However, hereinafter, for convenience of explanation, two display sections (DSP[n], DSP[n+1]) and a touch scan section (TS[n], TS[n+1]) are grouped together for display. It is defined as a display update and a touch scan.

4 and 5 are diagrams for explaining a problem of a display device having a conventionally proposed touch sensor, and FIGS. 6 and 7 are touch scan concepts of a display device having a touch sensor according to a first embodiment of the present invention These are drawings for explaining.

-Conventional technology-

As shown in FIG. 4, a display device having a touch sensor proposed in the related art is implemented as a display device having an in-cell touch sensor. In a display device having a touch sensor proposed in the related art, since a display update and a touch scan are alternated, when implementing a driving frequency of 120 Hz, touch scan is performed twice during one frame to sense the touch sensors. (1st Touch scan, 2nd Touch scan) is performed.

Specifically, the scan of the gate signal in the display period and the touch scan in the touch scan period are sequentially performed in the same direction from the upper direction to the lower direction of the display panel.

The display update and the touch scan are separated from each other in time. However, since the alternating driving of the display update and the touch scan occurs at a high speed, overlap is necessarily present between them (refer to the circular mark portion corresponding to the noise generating block in FIG. 4).

As described above, noise corresponding to a pen touch threshold level is generated in an area where overlap occurs between a block performing a touch scan and a block displaying or updating a data signal, such as when a display panel is touched with a pen. (Refer to the square box part corresponding to the noise generation block in FIG. 5)

Therefore, a display device having a touch sensor of the in-cell type proposed in the related art has a problem that noise corresponding to a pen touch threshold level is generated, and thus the signal-to-noise ratio (SNR) is lowered.

-First embodiment of the present invention-

In the first embodiment of the present invention, the overlap between a block performing a touch scan and a block displaying or updating a data signal is previously performed in order to improve and solve a problem occurring in a display device having a conventional in-cell touch sensor. prevent. More specifically, the first embodiment of the present invention scans the touch sensors out of order so as not to overlap with the scan direction in which the gate signal of the display panel is supplied.

6, the display device having the touch sensor according to the first embodiment of the present invention is implemented as a display device having an in-cell touch sensor. In the display device having the touch sensor according to the first embodiment of the present invention, since a display update and a touch scan period are alternated, when implementing a driving frequency of 120 Hz, 2 frames for 1 frame to sense the touch sensors 1st Touch scan, 2nd Touch scan is performed over time.

Specifically, the scan of the gate signal performed in the display period is sequentially performed from the upper direction to the lower direction of the display panel, but the touch scan performed during the touch scan period is lowered in the upper direction of the display panel. It is done out of sequence along the direction.

If a description related to a touch scan is added, the touch sensors of the display panel are grouped in M (M is an integer of 2 or more) block units. For example, when the touch sensors of the display panel are grouped into three blocks, the upper portion of the display panel is defined as a first touch block TxB1, a central portion as a second touch block TxB2, and a lower portion as a third touch block TxB3. .

The first touch scan and the second touch scan move along the lower direction from the upper direction of the display panel, but non-sequential scans are performed in block units. Specifically, the third touch block (TxB3) becomes the first scan block (①), the second touch block (TxB2) becomes the second scan block (②), and the first touch block (TxB1) becomes the third scan It becomes a block (③). The first touch block TxB1, the second touch block TxB2, and the third touch block TxB3 are scanned in ascending order.

For example, the first touch block TxB1 is defined as first to ten sensor lines, the second touch block TxB2 is defined as eleventh to twenty-first sensor lines, and the third touch block TxB3 is It is defined by the 22nd to 29th sensor lines.

In this case, the first touch scan is in the order of 22->23->24->25->26->27->28->29 sensor lines included in the third touch block (TxB3). Scan and scan in the order of 11->12->13->14->15->16->17->18->19->20->21 sensor lines included in the second touch block (TxB2) Then, scan in the order of 1->2->3->4->5->6->7->8->9->10 sensor lines included in the first touch block (TxB1). Thereafter, the second touch scan is also performed in the same order as the first touch scan.

That is, the first touch scan (1st Touch scan) and the second touch scan (2nd Touch scan) have the same scan sequence, and non-sequential scans are performed in block units, but the lower region, the central region, and the upper portion of the display panel. The scan is done in ascending order by region.

As illustrated in FIG. 7, the scan of a gate signal performed in a display update during a time period during which a first touch scan is performed is performed from a gate line located at the first position of the display panel 110 to the middle. It may correspond to a point of the gate line located.

The scan of the gate signal performed in the display update is sequentially performed from the upper direction to the lower direction of the display panel 110. However, the first touch scan is performed in the order of the third touch block TxB3, the second touch block TxB2, and the first touch block TxB1 from a direction opposite to the scan direction of the gate signal.

The scan time in the touch scan section corresponds to the scan time in the display update, and the scan time in the display update is divided into initial, middle, and late stages as follows. The scan time of the first scan block (①) corresponds to the beginning of the display update, the scan time of the second scan block (②) corresponds to the middle period, and the scan of the third scan block (③) in the later stages. Time corresponds. This is because the start point of the scan performed in the display update and the start point of the scan performed in the touch scan are at opposite positions.

Therefore, since the display period and the touch scan period are scanned at different locations, even if alternating driving of the display period and the touch scan period occurs at a high speed, between them There is no overlap.

During the time during which the second touch scan is performed, the scan of the gate signal performed in the display update corresponds to the point of the gate line located in the middle from the gate line positioned in the middle of the display panel 110. Can be.

The scan of the gate signal performed in the display update is sequentially performed from the upper direction to the lower direction of the display panel 110. However, the second touch scan is performed in the order of the third touch block TxB3, the second touch block TxB2, and the first touch block TxB1 from a direction opposite to the scan direction of the gate signal.

The scan time in the touch scan section corresponds to the scan time in the display update, and the scan time in the display update is divided into initial, middle, and late stages as follows. The scan time of the first scan block (①) corresponds to the beginning of the display update, the scan time of the second scan block (②) corresponds to the middle period, and the scan of the third scan block (③) in the later stages. Time corresponds.

Therefore, the display period (Display update) and the touch scan period (Touch scan) are made in different directions, so even if the alternating driving of the Display period (Display update) and the touch scan period (Touch scan) occurs at a high speed, overlap between them occurs. does not exist.

<Example 2>

8 is a view for explaining a touch scan concept of a display device having a touch sensor according to a second embodiment of the present invention.

The display device having the touch sensor according to the second embodiment of the present invention is implemented as a display device having an in-cell touch sensor, such as the display device having the touch sensor according to the first embodiment of the present invention. Since the display device having the touch sensor according to the second embodiment of the present invention is the same as the display device having the touch sensor according to the first embodiment of the present invention, refer to FIGS. 1 to 3 for its configuration and basic driving method. . However, hereinafter, for convenience of description, two divided display sections and a touch scan section are grouped into one, which is defined as a display update and a touch scan section.

As shown in FIG. 8, in a display device having a touch sensor according to a second embodiment of the present invention, when a display frequency and a touch scan interval are alternated, when a driving frequency of 120 Hz is implemented, the touch sensor In order to sense them, a touch scan is performed twice in one frame (1st Touch scan, 2nd Touch scan).

Specifically, the scan of the gate signal performed in the display period is sequentially performed from the upper direction to the lower direction of the display panel, but the touch scan performed during the touch scan period is lowered in the upper direction of the display panel. It is done out of sequence along the direction.

If a description related to a touch scan is added, the touch sensors of the display panel are grouped in M (M is an integer of 2 or more) block units. For example, when the touch sensors of the display panel are grouped into three blocks, the upper portion of the display panel is defined as a first touch block TxB1, a central portion as a second touch block TxB2, and a lower portion as a third touch block TxB3. .

The first touch scan and the second touch scan move along the lower direction from the upper direction of the display panel, but non-sequential scans are performed in block units. For example, the second touch block (TxB2) becomes the first scan block (①), the third touch block (TxB3) becomes the second scan block (②), and the first touch block (TxB1) becomes the third scan block It becomes (③). The first touch block TxB1, the second touch block TxB2, and the third touch block TxB3 are scanned in ascending order.

That is, the first touch scan (1st Touch scan) and the second touch scan (2nd Touch scan) have the same scan sequence, and a non-sequential scan is performed in block units, but the central region, the lower region, and the upper portion of the display panel The scan is done in ascending order by region.

Therefore, since the display period and the touch scan period are scanned at different positions, even if alternating driving of the display period and the touch scan period occurs at high speed, between them There is no overlap.

<Example 3>

9 is a view for explaining a touch scan concept of a display device having a touch sensor according to a third embodiment of the present invention.

The display device having the touch sensor according to the third embodiment of the present invention is implemented as a display device having an in-cell touch sensor as the display device having the touch sensor according to the first embodiment of the present invention. Since the display device having the touch sensor according to the third embodiment of the present invention is the same as the display device having the touch sensor according to the first embodiment of the present invention, refer to FIGS. 1 to 3 for its configuration and basic driving method. . However, hereinafter, for convenience of description, two divided display sections and a touch scan section are grouped into one, which is defined as a display update and a touch scan section.

As shown in FIG. 9, in a display device having a touch sensor according to a third embodiment of the present invention, when a display frequency and a touch scan interval are alternated, when implementing a driving frequency of 120 Hz, the touch sensor In order to sense them, a touch scan is performed twice in one frame (1st Touch scan, 2nd Touch scan).

Specifically, the scan of the gate signal performed in the display period is sequentially performed from the upper direction to the lower direction of the display panel, but the touch scan performed during the touch scan period is lowered in the upper direction of the display panel. It is done out of sequence along the direction.

If a description related to a touch scan is added, the touch sensors of the display panel are grouped in M (M is an integer of 2 or more) block units. For example, when the touch sensors of the display panel are grouped into three blocks, the upper portion of the display panel is defined as a first touch block TxB1, a central portion as a second touch block TxB2, and a lower portion as a third touch block TxB3. .

The first touch scan and the second touch scan move along the lower direction from the upper direction of the display panel, but non-sequential scans are performed in block units. For example, the third touch block (TxB3) becomes the first scan block (①), the first touch block (TxB1) becomes the second scan block (②), and the second touch block (TxB2) becomes the third scan block. It becomes (③). The first touch block TxB1, the second touch block TxB2, and the third touch block TxB3 are scanned in ascending order.

That is, the first touch scan (1st Touch scan) and the second touch scan (2nd Touch scan) have the same scan sequence, and a non-sequential scan is performed in block units, but the lower area, upper area and center of the display panel The scan is done in ascending order by region.

Therefore, since the display period and the touch scan period are scanned at different locations, even if alternating driving of the display period and the touch scan period occurs at a high speed, between them There is no overlap.

<Example 4>

10 is a view for explaining a touch scan concept of a display device having a touch sensor according to a fourth embodiment of the present invention.

The display device having the touch sensor according to the fourth embodiment of the present invention is implemented as a display device having an in-cell touch sensor, such as the display device having the touch sensor according to the first embodiment of the present invention. Since the display device having the touch sensor according to the fourth embodiment of the present invention is the same as the display device having the touch sensor according to the first embodiment of the present invention, refer to FIGS. 1 to 3 for its configuration and basic driving method. . However, hereinafter, for convenience of description, two divided display sections and a touch scan section are grouped into one, which is defined as a display update and a touch scan section.

As shown in FIG. 10, in a display device having a touch sensor according to a fourth embodiment of the present invention, when a display frequency and a touch scan interval are alternated, when implementing a driving frequency of 120 Hz, the touch sensor In order to sense them, a touch scan is performed twice in one frame (1st Touch scan, 2nd Touch scan).

Specifically, the scan of the gate signal in the display period is sequentially performed along the lower direction from the upper direction of the display panel, but the touch scan during the touch scan period is upper in the lower direction of the display panel. It is done out of sequence along the direction.

If a description related to a touch scan is added, the touch sensors of the display panel are grouped in M (M is an integer of 2 or more) block units. For example, when the touch sensors of the display panel are grouped into three blocks, the upper portion of the display panel is defined as a first touch block TxB1, a central portion as a second touch block TxB2, and a lower portion as a third touch block TxB3. .

The first touch scan and the second touch scan move along the upper direction from the lower direction of the display panel, but non-sequential scans are performed in block units. For example, the third touch block (TxB3) becomes the first scan block (①), the second touch block (TxB2) becomes the second scan block (②), and the first touch block (TxB1) becomes the third scan block. It becomes (③). The first touch block TxB1, the second touch block TxB2, and the third touch block TxB3 are scanned in ascending order.

That is, the first touch scan (1st Touch scan) and the second touch scan (2nd Touch scan) have the same scan sequence, and non-sequential scans are performed in block units, but the lower region, the central region, and the upper portion of the display panel. Scanning is performed in descending order in the area order.

Therefore, since the display period and the touch scan period are scanned at different locations, even if alternating driving of the display period and the touch scan period occurs at a high speed, between them There is no overlap.

<Example 5>

11 is a view for explaining a touch scan concept of a display device having a touch sensor according to a fifth embodiment of the present invention.

The display device having the touch sensor according to the fifth embodiment of the present invention is implemented as a display device having an in-cell touch sensor, such as the display device having the touch sensor according to the first embodiment of the present invention. Since the display device having the touch sensor according to the fifth embodiment of the present invention is the same as the display device having the touch sensor according to the first embodiment of the present invention, refer to FIGS. 1 to 3 for its configuration and basic driving method. . However, hereinafter, for convenience of description, two divided display sections and a touch scan section are grouped into one, which is defined as a display update and a touch scan section.

As shown in FIG. 11, in a display device having a touch sensor according to a fifth embodiment of the present invention, when a display frequency and a touch scan interval are alternated, when implementing a driving frequency of 120 Hz, the touch sensor In order to sense them, a touch scan is performed twice in one frame (1st Touch scan, 2nd Touch scan).

Specifically, the scan of the gate signal performed in the display period is sequentially performed along the lower direction from the upper direction of the display panel, but the touch scan performed during the touch scan period is upper in the lower direction of the display panel. It is done out of sequence along the direction.

If a description related to a touch scan is added, the touch sensors of the display panel are grouped in M (M is an integer of 2 or more) block units. For example, when the touch sensors of the display panel are grouped into three blocks, the upper portion of the display panel is defined as a first touch block TxB1, a central portion as a second touch block TxB2, and a lower portion as a third touch block TxB3. .

The first touch scan and the second touch scan move along the upper direction from the lower direction of the display panel, but non-sequential scans are performed in block units. For example, the second touch block (TxB2) becomes the first scan block (①), the third touch block (TxB3) becomes the second scan block (②), and the first touch block (TxB1) becomes the third scan block It becomes (③). The first touch block TxB1, the second touch block TxB2, and the third touch block TxB3 are scanned in ascending order.

That is, the first touch scan (1st Touch scan) and the second touch scan (2nd Touch scan) have the same scan sequence, and a non-sequential scan is performed in block units, but the central region, the lower region, and the upper portion of the display panel Scanning is performed in descending order in the area order.

Therefore, since the display period and the touch scan period are scanned at different locations, even if alternating driving of the display period and the touch scan period occurs at a high speed, between them There is no overlap.

<Example 6>

12 is a view for explaining a touch scan concept of a display device having a touch sensor according to a sixth embodiment of the present invention.

The display device having the touch sensor according to the sixth embodiment of the present invention is implemented as a display device having an in-cell touch sensor, such as the display device having the touch sensor according to the first embodiment of the present invention. Since the display device having the touch sensor according to the sixth embodiment of the present invention is the same as the display device having the touch sensor according to the first embodiment of the present invention, refer to FIGS. 1 to 3 for its configuration and basic driving method. . However, hereinafter, for convenience of description, two divided display sections and a touch scan section are grouped into one, which is defined as a display update and a touch scan section.

As illustrated in FIG. 12, in a display device having a touch sensor according to a sixth embodiment of the present invention, when a display frequency and a touch scan interval are alternated, when implementing a driving frequency of 120 Hz, the touch sensor In order to sense them, a touch scan (1st Touch scan, 2nd Touch scan) is performed twice during one frame.

Specifically, the scan of the gate signal performed in the display period is sequentially performed along the lower direction from the upper direction of the display panel, but the touch scan performed during the touch scan period is upper in the lower direction of the display panel. It is done out of sequence along the direction.

If a description related to a touch scan is added, the touch sensors of the display panel are grouped in M (M is an integer of 2 or more) block units. For example, when the touch sensors of the display panel are grouped into three blocks, the upper portion of the display panel is defined as a first touch block TxB1, a central portion as a second touch block TxB2, and a lower portion as a third touch block TxB3. .

The first touch scan and the second touch scan move along the upper direction from the lower direction of the display panel, but non-sequential scans are performed in block units. For example, the third touch block (TxB3) becomes the first scan block (①), the first touch block (TxB1) becomes the second scan block (②), and the second touch block (TxB2) becomes the third scan block. It becomes (③). The first touch block TxB1, the second touch block TxB2, and the third touch block TxB3 are scanned in ascending order.

That is, the first touch scan (1st Touch scan) and the second touch scan (2nd Touch scan) have the same scan sequence, and a non-sequential scan is performed in block units, but the lower area, upper area and center of the display panel Scanning is performed in descending order in the area order.

Therefore, since the display period and the touch scan period are scanned at different locations, even if alternating driving of the display period and the touch scan period occurs at a high speed, between them There is no overlap.

On the other hand, in the present invention, although the first to sixth embodiments have been described separately, they may be combined in combination. For example, the first touch scan and the second touch scan may have the same scan sequence.

Specifically, in the first touch scan, the second touch block TxB2 becomes the first scan block ① and the third touch block TxB3 becomes the second scan block ②. The touch block (TxB1) becomes the third scan block (③). On the other hand, in the second touch scan (2nd Touch scan), the third touch block (TxB3) becomes the first scan block (①), the first touch block (TxB1) becomes the second scan block (②), and the second The touch block (TxB2) becomes the third scan block (③).

In addition, in the first touch scan, the first touch block TxB1, the second touch block TxB2, and the third touch block TxB3 are scanned in descending order. On the other hand, in the second touch scan, the first touch block TxB1, the second touch block TxB2, and the third touch block TxB3 are scanned in ascending order.

As described above, the present invention removes an area overlapped between a block that performs a touch scan and a block that displays or updates a data signal, and generates noise corresponding to a pen touch threshold level, such as touching a display panel with a pen. It has the effect of preventing and improving problems. In addition, the present invention has the effect of preventing and improving noise generation to improve the signal-to-noise ratio (SNR).

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the technical configuration of the present invention described above is in other specific forms without altering the technical spirit or essential features of the present invention by those skilled in the art to which the present invention pertains. It will be understood that it can be practiced. Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive. In addition, the scope of the present invention is indicated by the following claims rather than the detailed description. In addition, all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention.

100: host system 120: timing control
130: gate driver 140: data driver
160: touch sensor circuit unit 110: display panel
D1 to Dm: Data lines G1 to Gn: Gate lines
Tx1 ~ Txn: Sensor lines Display update: Display section
Touch scan: 1st Touch scan: 1st touch scan
2nd Touch scan: 2nd touch scan TxB1: 1st touch block
TxB2: 2nd touch block TxB3: 3rd touch block

Claims (10)

A display panel having gate lines, data lines, and sensor lines electrically connected to touch sensors, and the display section and the touch scan section alternately generated;
A gate driver that sequentially supplies gate signals to the gate lines to display or update data signals on the display panel; And
It includes a touch sensor circuit for supplying and scanning a sensing pulse for sensing the touch sensors of the display panel,
The touch sensor circuit unit groups the touch sensors into M (M is an integer of 2 or more) blocks for each area of the display panel, and performs a touch scan N (N is an integer of 2 or more) times for one frame,
The non-sequential scan is performed in units of the M blocks so as not to overlap the scan direction in which the gate signal of the display panel is supplied.
A display device having a touch sensor that scans the sensor lines of each block in descending order. delete delete A display panel having gate lines, data lines, and sensor lines electrically connected to touch sensors, and the display section and the touch scan section alternately generated;
A gate driver that sequentially supplies gate signals to the gate lines to display or update data signals on the display panel; And
It includes a touch sensor circuit for supplying and scanning a sensing pulse for sensing the touch sensors of the display panel,
The touch sensor circuit unit
The touch sensors are defined as an upper area of the display panel as a first touch block, a central area as a second touch block, and a lower area as a third touch block, and the first touch scan and the second touch are performed twice during one frame. Do a scan,
The first touch scan and the second touch scan have the same scan sequence, and the touch scan consists of the third touch block, the second touch block, and the first touch block,
A display device having a touch sensor that scans the sensor lines of each touch block in descending order. A display panel having gate lines, data lines, and sensor lines electrically connected to touch sensors, and the display section and the touch scan section alternately generated;
A gate driver that sequentially supplies gate signals to the gate lines to display or update data signals on the display panel; And
It includes a touch sensor circuit for supplying and scanning a sensing pulse for sensing the touch sensors of the display panel,
The touch sensor circuit unit
The touch sensors are defined as an upper area of the display panel as a first touch block, a central area as a second touch block, and a lower area as a third touch block, and the first touch scan and the second touch are performed twice during one frame. Do a scan,
The first touch scan and the second touch scan have the same scan sequence,
The touch scan is performed in the order of the second touch block, the third touch block, and the first touch block,
A display device having a touch sensor that scans the sensor lines of each touch block in descending order. A display panel having gate lines, data lines, and sensor lines electrically connected to touch sensors, and the display section and the touch scan section alternately generated;
A gate driver that sequentially supplies gate signals to the gate lines to display or update data signals on the display panel; And
It includes a touch sensor circuit for supplying and scanning a sensing pulse for sensing the touch sensors of the display panel,
The touch sensor circuit part
The touch sensors are defined as an upper area of the display panel as a first touch block, a central area as a second touch block, and a lower area as a third touch block, and the first touch scan and the second touch are performed twice during one frame. Do a scan,
The first touch scan and the second touch scan have the same scan sequence,
The touch scan is performed in the order of the third touch block, the first touch block, and the second touch block,
A display device having a touch sensor that scans the sensor lines of each touch block in descending order. In the driving method of the display device having a touch sensor grouped by M (M is an integer greater than or equal to 2) block units for each area of the display panel, the touch sensors,
A display section step of sequentially supplying a gate signal to gate lines of the display panel to display or update the data signal; And
It includes a touch scan interval step for supplying and scanning a sensing pulse for sensing the touch sensors,
The touch scan interval step is performed N times (N is an integer greater than or equal to 2) times during one frame, and the M blocks are non-sequentially touch-scanned so as to be non-overlapping with the scan direction in which the gate signal of the display panel is supplied,
A method of driving a display device having a touch sensor that performs a touch scan in descending order of sensor lines electrically connected to touch sensors of each block. In the driving method of the display device having a touch sensor grouped by M (M is an integer greater than or equal to 2) block units for each area of the display panel, the touch sensors,
A display section step of sequentially supplying a gate signal to gate lines of the display panel to display or update the data signal; And
It includes a touch scan interval step for supplying and scanning a sensing pulse for sensing the touch sensors,
The touch scan interval step
The M blocks are defined as an upper region of the display panel as a first first touch block, a central region as a second touch block, and a lower region as a third touch block, and a touch scan is the third touch block, the second A method of driving a display device including a touch block and a first touch block, wherein the sensor lines of each touch block have a touch sensor that scans in descending order. In the driving method of the display device having a touch sensor grouped by M (M is an integer greater than or equal to 2) block units for each area of the display panel, the touch sensors,
A display section step of sequentially supplying a gate signal to gate lines of the display panel to display or update the data signal; And
It includes a touch scan interval step for supplying and scanning a sensing pulse for sensing the touch sensors,
The touch scan interval step
The M blocks are defined as an upper region of the display panel as a first first touch block, a central region as a second touch block, and a lower region as a third touch block, and a touch scan is the second touch block, the third A method of driving a display device including a touch block and a first touch block, wherein the sensor lines of each touch block have a touch sensor that scans in descending order. In the driving method of the display device having a touch sensor grouped by M (M is an integer greater than or equal to 2) block units for each area of the display panel, the touch sensors,
A display section step of sequentially supplying a gate signal to gate lines of the display panel to display or update the data signal; And
It includes a touch scan interval step for supplying and scanning a sensing pulse for sensing the touch sensors,
The touch scan interval step
The M blocks are defined as an upper region of the display panel as a first first touch block, a central region as a second touch block, and a lower region as a third touch block, and touch scan is the third touch block, the first A method of driving a display device including a touch block and a second touch block, wherein the sensor lines of each touch block have a touch sensor that scans in descending order.

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