KR20160093750A - Touch screen display device including fingerprint sensor - Google Patents

Abstract

According to an embodiment of the present invention, a touch screen display device with a fingerprint sensor realizes touch recognition and fingerprint recognition through the fingerprint sensor by using one driver chip, thereby reducing manufacturing costs.

Description

TECHNICAL FIELD [0001] The present invention relates to a touch screen display device having a fingerprint sensor,

The present invention relates to a touch screen display device having a fingerprint sensor.

The touch screen may be a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescence device (EL) , And is a kind of an input device that presses (presses or touches) a touch sensor in a touch screen while the user views the image display device and inputs predetermined information.

The touch screen used in the above-described display device can be divided into an add-on type, an on-cell type, and an in-cell type according to its structure. The attachment type is a method in which a touch screen is attached to an upper plate of a display device after separately manufacturing a display device and a touch screen. The upper type is a method of directly forming elements constituting the touch screen on the upper glass substrate surface of the display device. The built-in type incorporates a touch screen inside the display device to achieve a thin display device and enhance durability. However, the attachable touch screen has a structure in which the completed touch screen is mounted on the display device and is thick, and the brightness of the display device becomes dark, thereby reducing visibility. In addition, the upper-surface type touch screen has a structure in which a separate touch screen is formed on the upper surface of the display device. Though it is possible to reduce the thickness of the touch screen, the thickness of the driving electrode and the sensing electrode constituting the touch screen, There is a problem that the manufacturing cost increases due to an increase in thickness and an increase in the number of processes.

On the other hand, the integrated touch screen has advantages of improving durability and thinning, and solving the problems caused by the attachment type and the upper type touch screen. Such an integrated touch screen can be classified into a light type and a capacitive touch screen.

The optical touch screen forms a light sensing layer on a thin film transistor substrate array of a display device and recognizes light reflected through an object existing in a touched portion by using light from a backlight unit or infrared light. However, the optical touch screen exhibits a relatively stable driving performance in the case of a dark environment, but stronger lights than the reflected light act as noise when the surroundings are bright. This is because the intensity of the light reflected by the actual touch is very weak, which may cause an error in touch recognition even if the outside is slightly bright. Particularly, the optical touch screen has a problem that when the surrounding environment is exposed to sunlight, the light intensity is so strong that the touch recognition may not be performed in some cases.

The capacitance type touch screen can be divided into a self capacitance type and a mutual capacitance type. The mutual capacitive touch screen divides a common electrode into two parts, a drive electrode and a sensing electrode, so that a mutual capacitance is formed between the driving electrode and the sensing electrode, thereby measuring the amount of mutual capacitance generated during touch Thereby recognizing the touch. However, mutual capacitance type touch screen has a very small mutual capacitance generated when a touch is recognized, while parasitic capacitance between a gate line and a data line constituting a display device is very large, There is a problem that is difficult to recognize. In addition, since the mutual capacitance type touch sensor requires a plurality of touch driving lines for touch driving and a plurality of touch sensing lines for touch sensing on the common electrode, a complicated wiring structure is required. In order to solve such a problem, a plurality of electrodes are formed so as to overlap with a plurality of pixel electrodes when the plurality of electrodes are formed in the display region of the panel, and these electrodes are driven with the pixel electrodes formed in each pixel during the display driving period There has been proposed a display method and a touch driving method which operate as a common electrode and operate as a touch electrode for sensing a touch position by a touch scan signal applied from a touch driver during a touch driving period.

In addition, since the application of fingerprint recognition is becoming more and more popular in applications such as mobile, a display device in which a fingerprint sensor is applied to a display device is being developed. However, since a driver chip for touch recognition and a driver chip for a fingerprint sensor must be provided, there is a problem in that it is not cost effective.

A touch screen display device having a fingerprint sensor according to an embodiment of the present invention includes a fingerprint sensor capable of reducing fingerprint recognition by using a single driver chip and fingerprint recognition using the fingerprint sensor, A touch screen display device can be provided.

A touch screen display device having a fingerprint sensor according to an embodiment of the present invention includes a display panel having a touch screen, a fingerprint sensor, a touch sensed by the touch screen, a sensing driver sensing a fingerprint sensed by the fingerprint sensor, And a connection controller for electrically connecting any one of the touch screen and the fingerprint sensor to the sensing driver. The connection controller may electrically connect the sensing driver and the touch screen in response to a connection control signal of the timing controller Alternatively, by electrically connecting the sensing driver and the fingerprint sensor, both the touch screen and the fingerprint sensor can be driven through a single sensing driver, thereby reducing the cost of reducing the number of sensing drivers.

The connection control unit includes a switch unit. The switch unit connects the touch screen and the sensing driver to each other through a first sensing line. The fingerprint sensor and the sensing driver are connected to a second They can be connected to each other through a sensing line. In addition, since the above fingerprint is sensed in the vertical blank time, it is not necessary to set a separate fingerprint sensing driving time, and the fingerprint sensing operation is performed in the vertical blank time, so that the fingerprint sensing You can proceed at the same time. The frequency of the first sensing pulse supplied from the sensing driver to the fingerprint sensor when sensing the fingerprint may be higher than the frequency of the second sensing pulse supplied from the sensing driver to the touch screen during the touch sensing operation, Therefore, it is possible to compensate for insufficient fingerprint sensing time.

The number of the first sensing lines and the number of the second sensing lines may be equal to each other so that either one of the sensing driver line of the sensing driver and the second sensing line of the touch screen or the first sensing line of the fingerprint sensor To-one relationship.

A touch screen display device having a fingerprint sensor according to an embodiment of the present invention includes a fingerprint sensor capable of reducing fingerprint recognition by using a single driver chip and fingerprint recognition using the fingerprint sensor, A touch screen display device can be provided.

1 illustrates a touch screen display device including a fingerprint sensor according to an embodiment having one gate driving circuit.
FIG. 2 illustrates a touch screen display device including a fingerprint sensor according to an embodiment having two gate driving circuits. FIG.
3 is a diagram for explaining a vertical synchronization signal;
FIG. 4 is a waveform diagram illustrating fingerprint sensing and touch sensing of a display device according to an exemplary embodiment of the present invention, and an operation method of the display device. FIG.
5 is a diagram of a connection control section of a display apparatus according to a first embodiment of the present invention.
6 is a diagram of a connection control section of a display apparatus according to a second embodiment of the present invention.
7 is a view showing a plurality of pixels of a display panel and corresponding pattern electrodes.
8 is a view showing a connection relationship between a pattern electrode and a sensing line;
9 is a view illustrating an electrode structure of a touch screen in a touch screen display device including a fingerprint sensor according to another embodiment of the present invention.

Hereinafter, a touch screen display device including a fingerprint sensor according to an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the size and thickness of an apparatus may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, it should be understood that the present invention is not limited to the embodiments disclosed herein but may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The dimensions and relative sizes of the layers and regions in the figures may be exaggerated for clarity of illustration.

It will be understood that when an element or layer is referred to as being another element or "on" or "on ", it includes both intervening layers or other elements in the middle, do. On the other hand, when a device is referred to as "directly on" or "directly above ", it does not intervene another device or layer in the middle.

The terms spatially relative, "below," "lower," "above," "upper," and the like, And may be used to easily describe the correlation with other elements or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element. Thus, the exemplary term "below" can include both downward and upward directions.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprise "and / or" comprising ", as used in the specification, means that the presence of stated elements, Or additions.

FIG. 1 is a view showing a touch screen display device including a fingerprint sensor according to an embodiment having one gate driving circuit, FIG. 2 includes a fingerprint sensor according to an embodiment having two gate driving circuits, Fig. 3 is a diagram showing a touch screen display device.

As shown in the figure, the display apparatus of the present invention includes a display panel 100 for displaying an image, a timing controller 400 for receiving various timing signals from an external system to generate various control signals, And a fingerprint sensor (600) for sensing a fingerprint, the sensing drive (500) including a gate and a data driving circuit (200, 300) for controlling the touch panel And a connection control unit 700 for controlling the connection between the sensing unit 500 and the touch screen in the display panel 100 or the connection between the sensing unit 500 and the fingerprint sensor 600.

In the liquid crystal panel as an example of the display panel 100, K (K is a natural number) gate lines GL and a plurality of data lines DL are arranged in a matrix form on a substrate using glass or polyimide And defines a plurality of pixels 110 at intersections. Each pixel 110 is provided with a thin film transistor (TFT), a liquid crystal capacitor Clc and a storage capacitor Cst, and all the pixels 110 constitute one display area A / A. A region where the pixel 110 is not defined is divided into a non-display region (N).

In addition, the display panel 100 has a built-in touch screen, and the touch screen performs a function of sensing a touch position of the user. In particular, the display panel 100 according to the present invention is a self- It is possible to integrate the insole type touch screen.

The timing controller 400 outputs a timing signal such as a video signal RGB transmitted from an external system and a clock signal DCLK, a horizontal synchronization signal Hsync, a vertical synchronization signal Vsync, and a data enable signal DE And generates a control signal for the gate drive circuit 200 and the data drive circuit 300.

Here, the horizontal synchronization signal Hsync is a signal indicating the time taken to display one horizontal line of the screen, and the vertical synchronization signal Vsync is a signal indicating the time taken to display a frame of one frame. The data enable signal DE is a signal indicating a period during which the data voltage is supplied to the pixel defined in the display panel 100.

The timing controller 400 generates the control signal GCS of the gate driving circuit 200 and the control signal DCS of the data driving circuit 300 in synchronization with the input timing signal.

In addition, the timing controller 400 generates a plurality of clock signals for determining the driving timing of each stage of the gate driving circuit 200, and supplies the generated clock signals to the gate driving circuit 200. The timing controller 400 arranges and modulates the received image data (RGB DATA) in a form that the data driving circuit 300 can process. Here, the aligned image data may be a form in which a color coordinate correction algorithm for improving image quality is applied.

The timing controller 400 outputs a first sensing control signal SCS1 as a fingerprint sensing enable signal for fingerprint sensing driving and a second sensing control signal SCS2 as a touch enable signal for touch driving to a sensing drive 500 The sensing drive 500 generates and outputs a first sensing pulse based on the first sensing control signal SCS1 or outputs a second sensing signal based on the second sensing control signal SCS2, A pulse can be generated and output.

The timing controller 400 may also output a connection control signal CS for controlling the connection control unit 700 to the connection control unit 700.

The connection control unit 700 may connect the sensing driver 500 with the sensing line based on the connection control signal CS or may connect the sensing line to the fingerprint sensor 600. [

Next, the data driving circuit 300 generates a sampling signal by shifting a source start pulse (SSP) from the timing controller 400 according to a source shift clock (SSC). The data driving circuit 300 latches the image data input according to the source shift clock SSC according to the sampling signal and changes the data into a data signal and then outputs the data signal to the data driver 300 in response to a source output enable And supplies a data signal to the data lines DL in units of horizontal lines. To this end, the data driving circuit 300 may include a data sampling unit, a latch unit, a digital-analog converting unit, and an output buffer.

Next, the gate driving circuit 200 shifts a gate start pulse (GSP) transmitted from the timing controller 400 according to a gate shift clock (GSC) GL1 to GLn to the gate lines GL1 to GLn during the rest of the period in which the scan pulse of the gate high voltage VGH is not supplied, (VGL).

The gate driving circuit 200 according to the present invention may be formed independently from the display panel 100 and may be electrically connected to the display panel 100 in various ways, The substrate 200 may be embedded in a non-display region N in the form of a thin film pattern in a gate-in-panel (GIP) manner when the display panel 100 is manufactured. In this case, the gate control signal for controlling the gate driving circuit 200 may be the clock signal CLK and the start signal VST for driving the first driven stage of the shift register.

The fingerprint sensor 600 is a device capable of recognizing a person's fingerprint. Fingerprint recognition is the recognition of a specific person by acquiring fingerprint images and comparing them with stored fingerprint images using the feature that everyone has different fingerprints. The fingerprint sensor 600 can recognize the fingerprint in a capacitive manner and the fingerprint sensor 600 can sense the fingerprint due to the difference in capacitance of the capacitor caused by the fingerprint contacting the sensing electrode.

Referring to FIG. 2, the gate driving circuit 200 may be provided at both ends of the display panel 100 and in the non-display area N. In FIG. The first and second gate driver circuits 200a and 200b include a plurality of stages including shift registers. The first and second gate driving circuits 200a and 200b are connected to a plurality of gate lines GL1 to GLn formed on the display panel 100 in response to a gate control signal GCS input from the timing controller 400. [ It is possible to alternately output the gate high voltage VGH which is a scan pulse. Here, the output gate high voltage VGH may be overlapped during a certain horizontal period. This is for precharging the gate lines GL1 to GLn, so that it is possible to more stably charge the pixel when the data voltage is applied.

FIG. 3 is a view for explaining a vertical synchronization signal, and FIG. 4 is a waveform diagram for explaining a fingerprint sensing and a touch sensing of a display device according to an embodiment of the present invention and an operation method of the display device.

Referring to FIG. 3, a vertical synchronous signal (Vsync) is a reference signal indicating the start (or end) of a frame in time, and a data enable signal (DE) (Line) time, that is, a signal indicating an interval in which there is image data to be displayed on the screen.

t1 is time indicating the time from the start to the end of the vertical synchronization signal and indicating the beginning (or end) of one screen. And t2 is the time from the end of the data enable (DE) of the last line (the last line of the screen) to the start point of the vertical synchronization signal. And t3 is the time from the end of the vertical synchronization signal to the start of the data enable (DE) (the first line of the screen). T4 + t2 + t3 is the vertical blank time. T5 is a time when there is valid line data in one frame, and t6 is a time corresponding to the vertical blank time (t4) + t5.

4, the connection control signal CS supplied from the timing controller 400 to the connection control unit 700 becomes a high logic level at the vertical blank time t4 and a low logic level at the other times . When the connection control signal CS is at the high logic level, the connection controller 700 can electrically connect the sensing driver 500 and the first sensing line SL1 on the fingerprint sensor 600, The connection controller 700 can electrically connect the sensing driver 500 and the second sensing line SL2 on the display panel 100 when the control signal CS is at a low logic level. In this way, it is not necessary to set a separate fingerprint sensing driving time, and the fingerprint sensing operation is performed at the vertical blank time t4, whereby the fingerprint sensing can be performed simultaneously within the range that does not affect the image display.

When the first sensing control signal SCS1 from the first and second sensing control signals SCS1 and SCS2 provided from the timing controller 400 to the sensing driver 500 is at a high logic level, A second sensing pulse may be output from the sensing driver 500 when the second sensing control signal SCS2 is at a high logic level. When the connection control signal CS is at a high logic level, the first sensing control signal SCS1 also becomes a high logic level so that the first sensing pulse can be supplied to the fingerprint sensor 600 as a pulse for fingerprint sensing When the connection control signal CS is at a low logical level so that the second sensing pulse can be provided to the touch screen of the display panel 100 as a pulse for touch sensing, The control signal SCS2 may be at a high logic level. The connection control signal CS may also be used as the first sensing control signal SCS1.

On the other hand, the fingerprint sensing may be performed within the vertical blank time t4, and the touch sensing may be performed during some of the time t2. Therefore, the fingerprint sensing time may be less than the touch sensing time. In order to compensate for the insufficient fingerprint sensing time, the frequency f1 of the first sensing pulse may be set higher than the frequency f2 of the second sensing pulse. This is based on the fact that the size of the fingerprint sensor 600 is smaller than that of the display panel 100 so that the panel load is less.

FIG. 5 illustrates a connection control unit of a display apparatus according to a first embodiment of the present invention, and FIG. 6 illustrates a connection control unit of a display apparatus according to the second embodiment of the present invention.

5 and 6, the connection control unit 700 may include a switching control unit 710 and a switch unit 720.

The switching control unit 710 may output a switch control signal SWC for controlling the switching unit 720 in response to the connection control signal CS from the timing controller 400. [ The switching unit 720 may electrically connect the sensing driver line SDL of the sensing driver 500 or the first sensing line SL1 to the sensing line SL2 in response to the switch control signal SWC, And can be electrically connected to the sensing driver line (SDL) of the sensing driver (500).

Each of the first and second sensing lines SL1 and SL2 may be a single sensing line when the fingerprint sensor 600 and the touch screen are of the self-capacitance type, and the fingerprint sensor 600 and the touch screen A plurality of touch driving lines Tx for providing a sensing pulse to the touch screen or fingerprint sensor 600 of the display panel 100 and a touch screen or fingerprint of the display panel 100, And a plurality of touch sensing lines Rx for receiving a sensing signal from the sensor 600. [ The first sensing line SL1 includes a plurality of touch driving lines Tx and a plurality of touch sensing lines Rx and the second sensing line SL2 includes a plurality of touch driving lines Tx, The sensing driver line SDL also includes a first line to be connected to the plurality of touch driving lines Tx and a second line to be connected to the plurality of touch sensing lines Rx when the touch sensing line Rx is formed.

FIG. 7 is a view showing a plurality of pixels of a display panel and corresponding pattern electrodes, and FIG. 8 is a diagram showing a connection relationship between a pattern electrode and a sensing line.

As shown in FIG. 7, the display panel 100 may further include a plurality of pattern electrodes 120 corresponding to 1: 1 groups of all the pixels 110 into a plurality of pixel groups. And may be referred to as a touch screen including both the plurality of pattern electrodes 120 and the second sensing line SL2 connected thereto. As shown in FIG. 4, the plurality of pattern electrodes 120 may be connected to the sensing drive 500 via the connection control unit 700 through the second sensing line SL2.

A common voltage may be applied to the pattern electrode 120 to drive the display panel 100, and the common electrode may operate as a common electrode for driving the liquid crystal along with the pixel electrode. In addition, a touch scan signal may be applied to the pattern electrode 120 to sense the touch, and may act as a touch electrode to sense the touch position. For example, the image display driving and the touch sensing driving are temporally divided and driven within one frame. When the driving mode of the display panel 100 is the display driving mode, the plurality of pattern electrodes 120 are applied with a common voltage When the driving mode of the display panel 100 is the touch driving mode, the second sensing pulse, which is a touch scan signal, is received from the sensing drive 500, And operates as a touch electrode. Here, the common voltage may be applied from the sensing drive 500 or may be directly applied to the display panel 100 without passing through the sensing drive 500 with a separate common voltage generator.

Also, the sensing drive 500 includes a touch scan signal generating unit for generating a second sensing pulse, which is a touch scan signal, a touch sensing unit for sensing whether a touch is generated using the difference of the received second sensing pulse, A common voltage may be applied to each of the plurality of pattern electrodes 120 through the second sensing lines SL2 according to the driving mode of the display panel 100. [ Or a touch scan signal is applied, and the degree of signal delay of the touch scan signal depending on the presence or absence of the touch is detected to sense the touch.

Meanwhile, the pattern electrodes 120 may be grouped and operated sequentially for one frame, and the number of the pattern electrodes 120 may be varied in consideration of the touch driving time and the display driving time.

Also, the image display driving and the touch sensing driving are time-divisionally driven so as to function as both the common electrode and the touch electrode. Thus, the complexity of the wiring structure can be reduced by simplifying the electrode structure.

9 is a view illustrating an electrode structure of a touch screen in a touch screen display device including a fingerprint sensor according to another embodiment of the present invention.

9, the touch screen provided on the display panel 100 includes a touch sensing electrode 170 for sensing a change in capacitance according to a user's touch, And a touch driving electrode 160 formed by patterning and applied with a second sensing pulse which is a touch driving signal for sensing a user's touch.

The timing controller 400 may drive one frame period in a time division manner so that the image display driving for implementing an image on the display panel 100 and the touch driving for sensing the touch of the user are alternated. The timing controller 400 aligns video signals from the outside and converts them into digital video data (R, G, B) on a frame-by-frame basis, and supplies digital video data to the data driving circuit 300. The sensing driver 500 is connected to the touch sensing line Rx and the touch driving line Tx through the connection control unit 700 to apply the second sensing pulse to the touch driving electrode 160, It is possible to sense the change in the capacitance that is changed by the touch of the user from the memory 170.

The fingerprint sensor 600 is provided with a first sensing pulse supplied from the sensing driver 500 to the fingerprint sensor 600 through a first sensing line SL1, It is possible to sense the shape of the fingerprint by sensing the change of the signal according to the change of the fingerprint. The first sensing line SL1 may be a plurality of sensing lines connected to the plurality of electrodes in the fingerprint sensor 600 on a one-to-one basis in accordance with a self-capacitance method. The first sensing line SL1 may be a non- A plurality of touch sensing electrodes in the fingerprint sensor 600 and a touch driving line Tx and a touch sensing line Rx connected to the touch driving electrode in a one-to-one manner.

The sensing line SL2 of the touch screen or the first sensing line SL1 of the fingerprint sensor 600 is connected to the sensing driver line SDL of the sensing driver 500 through the connection controller 700, The resolution of the touch screen and the fingerprint sensor 600 can be designed to be the same. That is, the number of the first sensing lines SL1, the number of the second sensing lines, and the number of the sensing driver lines SDL are the same, so that the sensing driver 500 is connected to the switching unit 720 of the connection control unit 700 through the switching unit 720, One-to-one connection can be made to all the sensing lines SL1 of the fingerprint sensor 600 and all the sensing lines SL2 of the touch screen and all the second sensing lines SL2 of the touch screen or all the first sensing lines SL1 of the fingerprint sensor 600.

The connection control unit 700 electrically connects the sensing driver 400 and the touch screen in response to the connection control signal CS of the timing controller 400 or connects the sensing driver 400 and the fingerprint sensor 600 The touch screen and the fingerprint sensor 600 can all be driven through one sensing driver 400 and the cost for saving the number of sensing drivers 400 can be reduced.

In addition, the fingerprint is sensed at the vertical blank time at which the image display drive and the touch detection drive do not occur, so that the image display drive and the touch detection drive are not influenced at the time of fingerprint sensing and the load of the fingerprint sensor 600 is small , The short time of the vertical blank time can be compensated for by raising the frequency (f1) of the first sensing pulse.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10 display device
100 display panel
110 pixels
120 pattern electrode
160 touch driving electrode
170 Touch sensing electrode
200 gate drive circuit
300 data drive circuit
400 timing controller
500 Sensing Driver
600 fingerprint sensor
700 connection control unit
710 switching control section
720 switch section

Claims (8)

A display panel having a touch screen;
Fingerprint sensor;
A sensing driver sensing a touch sensed by the touch screen and a fingerprint sensed by the fingerprint sensor; And
And a connection controller for electrically connecting any one of the touch screen and the fingerprint sensor to the sensing driver
A touch screen display device having a fingerprint sensor. The method according to claim 1,
Wherein the connection control section includes a switch section,
The switch unit connects the touch screen and the sensing driver to each other through a first sensing line and connects the fingerprint sensor and the sensing driver to each other through a second sensing line
A touch screen display device having a fingerprint sensor. 3. The method of claim 2,
The fingerprint is sensed at a vertical blank time
A touch screen display device having a fingerprint sensor. The method of claim 3,
The touch sensing driving and the image display driving are alternately driven,
A touch screen display device having a fingerprint sensor. 5. The method of claim 4,
Wherein the frequency of the first sensing pulse supplied from the sensing driver to the fingerprint sensor when sensing the fingerprint is higher than the frequency of the second sensing pulse supplied from the sensing driver to the touch screen during the touch sensing operation
A touch screen display device having a fingerprint sensor. 3. The method of claim 2,
The number of the first sensing lines and the number of the second sensing lines are equal to each other
A touch screen display device having a fingerprint sensor. A method of driving a touch screen display device having a fingerprint sensor,
The image display driving and the touch sensing driving are alternately performed during the first time period,
The fingerprint sensor is driven during the second time period,
Wherein the sensing driver is connected to the touch screen,
Wherein the sensing driver is connected to the fingerprint sensor
A touch screen display device having a fingerprint sensor. 8. The method of claim 7,
The second time interval may be a vertical blank time
A touch screen display device having a fingerprint sensor.

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