KR20210009003A - Display apparatus with a large area fingerprint sensor - Google Patents

Abstract

The present invention provides a display device having a large area fingerprint sensor capable of simplifying a manufacturing process, wherein fingerprint pixels are divided into at least two groups, and reception electrodes corresponding to the fingerprint pixels provided at the same position in each group are electrically connected. To this end, the display device having the large area fingerprint sensor comprises a display panel, a touch panel, a fingerprint sensor, a fingerprint sensor driver, and a touch driver.

Description

Display device equipped with a large area fingerprint sensor {DISPLAY APPARATUS WITH A LARGE AREA FINGERPRINT SENSOR}

The present invention relates to a display device equipped with a fingerprint sensor.

The fingerprint sensor is a sensor that senses a person's fingerprint. Fingerprint sensors are generally used for locking devices such as door locks, but recently they are also used for releasing the sleep mode of electronic devices such as smart phones, and are also used as authentication means for various applications provided in smart phones.

The fingerprint sensor can be classified into an ultrasonic type, an infrared type, and a capacitive type, depending on the operating principle.

In particular, a fingerprint sensor using an ultrasonic method recognizes a fingerprint using a difference in voltages generated when ultrasonic waves generated from a plurality of piezoelectric elements are reflected from a valley and a ridge of the fingerprint.

Conventional fingerprint sensors are provided only in some areas of electronic devices such as, for example, smart phones. However, as various applications using fingerprint recognition are provided in electronic devices, the size of the fingerprint sensor needs to be the same as the size of the display area of the display panel.

As the size of the fingerprint sensor increases, the number of receiving electrodes constituting the fingerprint sensor increases, and thus, the number of sensing lines connected to the receiving electrodes is also increased. When the number of sensing lines is increased, the number of channels of an integrated circuit connected to the sensing lines to recognize a fingerprint using sensing signals received from the sensing lines must be increased or the number of integrated circuits must be increased.

When the number of channels of the integrated circuit increases or the number of integrated circuits increases, the manufacturing cost of the display device increases, the manufacturing process becomes complicated, and the size of the bezel on which the integrated circuit is provided must increase. In particular, when the bezel is increased, it is difficult to satisfy the demands of users who want to decrease the bezel.

An object of the present invention proposed to solve the above problem is that fingerprint pixels are divided into at least two groups, and receiving electrodes corresponding to fingerprint pixels provided at the same position in each group are electrically connected, It is to provide a display device equipped with a large area fingerprint sensor.

A display device equipped with a large-area fingerprint sensor according to the present invention for achieving the above-described technical problem is a display panel that displays an image, a touch panel that senses a touch, and performs a function as a basic unit for recognizing a fingerprint of a finger. And a fingerprint sensor having fingerprint pixels, a fingerprint sensor driver for driving the fingerprint sensor, and a touch driver for driving the touch panel. The fingerprint sensor is provided with sensing lines extending along a first direction and sensing gate lines extending along a second direction different from the first direction. The fingerprint pixels are divided into at least two groups, and receiving electrodes corresponding to the fingerprint pixels provided at the same position in each group are electrically connected.

According to the present invention, the number of sensing lines provided in the fingerprint sensor can be reduced, and accordingly, the manufacturing cost of the display device can be reduced and the manufacturing process can be simplified.

In addition, according to the present invention, the size and number of fingerprint recognition units connected to the sensing line may be reduced. Accordingly, the size of the bezel provided with the fingerprint recognition unit may be reduced, or the size of the bezel provided with the pad unit may be reduced because the size of the pad unit connected to the fingerprint recognition unit among the fingerprint sensors may be reduced. I can.

1 is an exemplary view showing the configuration of a display device equipped with a large area fingerprint sensor according to the present invention.
2 is an example of a configuration of a control unit applied to a display device equipped with a large area fingerprint sensor according to the present invention.
3 is an exemplary view showing the structure of a fingerprint sensor applied to a display device equipped with a large area fingerprint sensor according to the present invention.
4 is another exemplary view showing the structure of a fingerprint sensor applied to a display device equipped with a large area fingerprint sensor according to the present invention.
5 is an exemplary view for explaining the operating principle of a fingerprint sensor applied to a display device having a large area fingerprint sensor according to the present invention.
6 is an exemplary view for explaining the principle of driving a display device equipped with a large area fingerprint sensor according to the present invention.
7 is another exemplary view for explaining a principle of driving a display device equipped with a large area fingerprint sensor according to the present invention.
8 is an exemplary view showing waveforms of signals generated by a fingerprint sensor driver to drive the fingerprint sensor shown in FIG. 7;
9 is an exemplary view illustrating a method for dividing fingerprint pixels into groups of a display device equipped with a large area fingerprint sensor according to the present invention.
10 is an exemplary diagram showing a connection relationship between fingerprint pixels shown in FIG. 9;
11 is an exemplary view showing a touched area in a display device equipped with a large area fingerprint sensor according to the present invention.
12 is an enlarged exemplary view of an area in which a touch is made in FIG. 11;
FIG. 13 is an exemplary view for explaining a method of recognizing a fingerprint of a touched area in FIG. 11;
14 is an exemplary view showing a case in which the size of a user's fingerprint exceeds a preset normal area range in a display device equipped with a large area fingerprint sensor according to the present invention.
15 is an exemplary view showing groups constituting a fingerprint sensor applied to a display device equipped with a large area fingerprint sensor according to the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments are intended to complete the disclosure of the present invention, and those skilled in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the invention is only defined by the scope of the claims.

In the present specification, in adding reference numerals to elements of each drawing, it should be noted that only the same elements have the same number as possible, even if they are indicated on different drawings.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for describing the embodiments of the present invention are exemplary, and the present invention is not limited to the illustrated matters. The same reference numerals refer to the same components throughout the specification. In addition, in describing the present invention, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. When'include','have','consists of' and the like mentioned in the present specification are used, other parts may be added unless'only' is used. In the case of expressing the constituent elements in the singular, it includes the case of including the plural unless specifically stated otherwise.

In interpreting the constituent elements, it is interpreted as including an error range even if there is no explicit description.

In the case of a description of the positional relationship, for example, if the positional relationship of two parts is described as'upper','upper of','lower of','next to','right' Or, unless'direct' is used, one or more other parts may be located between the two parts.

In the case of a description of a temporal relationship, for example, when a temporal predecessor relationship is described as'after','following','after','before', etc.,'right' or'direct' It may also include cases that are not continuous unless this is used.

The term “at least one” is to be understood as including all possible combinations from one or more related items. For example, the meaning of'at least one of the first item, the second item and the third item' is not only the first item, the second item, or the third item, but also the second item, the second item, and the third item. It means a combination of all items that can be presented from more than one.

First, second, etc. are used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one component from another component. Accordingly, the first component mentioned below may be a second component within the technical idea of the present invention.

Each of the features of the various embodiments of the present invention can be partially or entirely combined or combined with each other, technically various interlocking and driving are possible, and each of the embodiments can be implemented independently of each other or can be implemented together in a related relationship. May be.

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

1 is an exemplary view showing the configuration of a display device equipped with a large area fingerprint sensor according to the present invention, and FIG. 2 is an exemplary view showing the configuration of a control unit applied to a display device equipped with a large area fingerprint sensor according to the present invention. to be.

A display device having a large area fingerprint sensor according to the present invention includes a display panel 100 displaying an image, a touch panel 800 sensing a user's touch, and the touch panel 800 as shown in FIG. 1. A touch driver 700 for driving a device, a gate driver 200 for supplying gate signals to the gate lines GL1 to GLg provided in the display panel 100, a function as a basic unit for recognizing a user's fingerprint The fingerprint sensor 500 provided with the fingerprint pixels 510 performing the operation, the fingerprint sensor driver 600 for driving the fingerprint sensor 500, and the data lines DL1 to DLd provided on the display panel. The data driver 300 for supplying data voltages and the input image data transmitted from the external system are converted into image data and transmitted to the data driver 300, and timing synchronization signals transmitted from the external system are converted into image data. And a controller 400 that generates a control signal for controlling the gate driver 200, the data driver 300, the touch driver 700, and the fingerprint sensor driver 600 by using the gate driver 200.

In the following, the components are sequentially described.

The display panel 100 may be a liquid crystal display panel including liquid crystal, an organic light emitting display panel including organic light emitting diodes, a light emitting display panel using inorganic light emitting devices, and various types of displays. Can be one of the panels.

The display panel 100 includes a display area 120 including pixels 110 displaying an image and a non-display area 130 surrounding the display area 120.

In the non-display area 130, the gate driver 200 for supplying gate signals to pixel driving circuits provided for each of the pixels 110 may be provided.

A display device equipped with a large-area fingerprint sensor according to the present invention includes a touch panel 800 used to determine the presence or absence of a touch by a user and a touch position. The touch panel may be integrally formed with the display panel 100, or may be manufactured independently of the display panel 100 and then attached to the display panel 100.

The touch panel may be manufactured using various methods such as a resistive method or a capacitive method. When the touch panel uses a capacitive method, the touch panel may be manufactured using a mutual method requiring touch driving electrodes and touch receiving electrodes. When the touch panel uses a capacitive method, the touch panel may be manufactured using a self-cap method requiring only a plurality of independently provided touch electrodes.

The touch driver 700 supplies a touch driving signal to the touch panel 800, and a location of the touch panel 800 at which a touch is made using the touch sensing signals received from the touch panel 800 (hereinafter, It generates information (hereinafter, simply referred to as touch position information) about the touch position.

The touch driver 700 transmits the touch location information to the fingerprint sensor driver 600.

The gate driver 200 supplies gate signals to the pixel driving circuits.

The gate driver 200 is provided in the non-display area 130 and may be manufactured together with the pixel driving circuits when the pixel driving circuits are manufactured. That is, the gate driver 200 may be directly embedded in the display panel 100 by using a gate in panel (GIP) method. However, the gate driver 200 may be manufactured independently of the display panel 100 and then mounted on the non-display area 130.

The gate driver 200 supplies a gate-on signal to the gate lines GL1 to GLg provided in the display panel 100 by using the gate control signals GCS transmitted from the control unit 400. . A plurality of gate clocks may be included in the gate control signals GCS.

Here, the gate-on signal means a signal capable of turning on the transistors connected to the gate lines GL1 to GLg. A signal capable of turning off the transistor is referred to as a gate off signal. The gate-on signal and the gate-off signal are collectively referred to as a gate signal.

The data driver 300 converts the image data Data transmitted from the controller 400 into data voltages, and then supplies the data voltages to the data lines DL1 to DLd.

The control unit 400 controls gate control signals GCS for controlling driving of the gate driver 200 and the data driver 300 using timing synchronization signals TSS input from an external system. It generates data control signals (DCS) for control. In addition, the control unit 400 converts input image data (Ri, Gi, Bi) input from the external system into image data, and converts the image data into the data driver 300. send.

As described above, the display device equipped with a large area fingerprint sensor according to the present invention supplies a touch drive signal to the touch panel 800 and uses the touch sensing signals received from the touch panel 800. A touch driver 700 for sensing whether a touch is present on the touch panel may be included, and the controller 400 may generate touch control signals for controlling the touch driver 700.

In addition, the control unit 400 may generate a fingerprint sensor control signal FCS for controlling the fingerprint sensor driver 600.

In order to perform the functions as described above, the control unit 400, as shown in FIG. 2, uses a timing synchronization signal (TSS) transmitted from the external system, and input image data transmitted from the external system. A data alignment unit 430 for rearranging the fields Ri, Gi, and Bi to supply the rearranged image data to the data driver 300, and the gate control signal GCS using the timing synchronization signals TSS And a control signal generator 420 for generating the data control signal DCS, the touch control signal, and the fingerprint sensor control signal FCS, the timing synchronization signal TSS transmitted from the external system and the input An input unit 410 that distributes image data (Ri, Gi, Bi) to the data alignment unit 430 and the control signal generation unit 420, and the image data generated by the data alignment unit and the control And an output unit 440 for outputting the control signals generated by the signal generation unit to the data driver 300 or the gate driver 200 or the fingerprint sensor driver 600 or the touch driver 700. I can.

In addition, the controller 400 includes information necessary for controlling the gate driver 200, the data driver 300, the fingerprint sensor driver 600, and the touch driver 700, and the input image data Ri , Gi, Bi) and the image data (Data) may further include a storage unit 450 for storing at least one. However, the storage unit 450 may be configured independently from the control unit 400.

The fingerprint sensor 500 includes a driving electrode unit for generating ultrasonic waves, receiving electrodes for receiving ultrasonic waves reflected from a fingerprint of a finger, and a piezoelectric material disposed between the driving electrode unit and the receiving electrodes. The piezoelectric material refers to a material exhibiting a piezoelectric effect, and means, for example, a material such as quartz, Rochelle salt, barium titanate, and the like.

The fingerprint sensor 500 is provided with the fingerprint pixels 510 used as a basic unit of fingerprint recognition.

The fingerprint sensor 500 includes sensing gate lines connected to transistors provided in the fingerprint pixels 510.

The fingerprint sensor 500 may be provided in an area corresponding to a portion of the display area 120, but may be formed to have the same size as the display area 120.

The fingerprint sensor driver 600 supplies driving signals to the driving electrode unit and sensing gate signals to the sensing gate lines.

The fingerprint sensor driver 600 includes a driving unit 610 for driving the driving electrode unit and a fingerprint recognition unit 620 for recognizing a fingerprint using sensing signals received from the fingerprint sensor 500. In addition, the fingerprint sensor driver 600 includes a power supply unit 640 for supplying power required to the driving unit 610 and the fingerprint recognition unit 620, and a fingerprint input by a user (hereinafter, simply referred to as a reference fingerprint). ) May further include a storage unit 630 for storing.

The power supply unit 640 may be configured outside the fingerprint sensor driver 600 and independently of the fingerprint sensor driver 600.

The configuration and functions of the fingerprint sensor 500 and the fingerprint sensor driver 600 will be described in detail below with reference to the drawings.

3 is an exemplary view showing a structure of a fingerprint sensor applied to a display device equipped with a large area fingerprint sensor according to the present invention, and FIG. 4 is a fingerprint sensor applied to a display device equipped with a large area fingerprint sensor according to the present invention. It is another exemplary view showing the structure of.

The fingerprint sensor 500 applied to the present invention, as shown in FIGS. 3 and 4, includes a base substrate 520 and transistors provided in the fingerprint pixels 510, and includes the base substrate 520. The fingerprint pixel driving layer 530 provided, the receiving electrodes 540 provided on the fingerprint pixel driving layer 530 and provided for each of the fingerprint pixels 150, and a plate provided on the top of the receiving electrodes 540 And a piezoelectric material 550 in the form of a piezoelectric material 550 and a driving electrode part 560 provided on the piezoelectric material 550.

The base substrate 520 may be a glass substrate or a film formed of a synthetic resin.

The fingerprint pixel driving layer 530 includes transistors.

Each of the receiving electrodes 540 is connected to a gate of a first transistor provided in each of the fingerprint pixels 510. The first transistor is provided in the fingerprint pixel driving layer 530.

The receiving electrodes 540 are output from the driving electrode unit 560 to receive ultrasonic waves reflected from the user's finger, and a voltage generated by the received ultrasonic waves (hereinafter, simply referred to as ultrasonic voltage) is the first transistor. To the gate of.

The piezoelectric material 550 generates ultrasonic waves by voltages supplied to the driving electrode unit 560 and the receiving electrodes 540, and is reflected by the user's finger and received by the receiving electrode 540. It performs a function of generating the ultrasonic voltage by ultrasonic waves. As described above, as the piezoelectric material 550, quartz, Rochelle salt, barium titanate, or the like may be used.

The driving electrode unit 560 may include rod-shaped driving electrodes, as shown in FIG. 3. In this case, driving signals from the fingerprint sensor driver 600 may be supplied to the driving electrodes through various methods.

However, the driving electrode unit 560 may be configured as one driving electrode having a plate shape, as shown in FIG. 4.

5 is an exemplary view for explaining the operating principle of a fingerprint sensor applied to a display device equipped with a large area fingerprint sensor according to the present invention.

In the fingerprint sensor 500, as described above, the fingerprint pixel driving layer 530 is provided on the base substrate 520, and the receiving electrode 540 is provided on the fingerprint pixel driving layer 530. Are provided, the piezoelectric material 550 is provided on the receiving electrodes 540, and the driving electrode part 560 is provided on the piezoelectric material 550.

In this case, among both surfaces of the base substrate 520 constituting the fingerprint sensor 500, a second surface opposite to the first surface on which the fingerprint pixel driving layer 530 is formed is the display panel 100 The image is adhered to the first surface 111 of the display panel 100 and outputs an image through the second surface 112 opposite to the first surface 111 of both surfaces of the display panel 100. The user's finger for fingerprint recognition is in contact with the second surface 112 of the display panel 100.

As described above, the display panel 100 may be a liquid crystal display panel, an organic light-emitting display panel, a light-emitting display panel using an inorganic light-emitting device, and other various types of display panels. Can be one.

In addition, the display panel 100 is provided with a touch panel 800 for sensing a touch position by a user. In this case, the touch panel 800 may be integrally formed with the display panel 100 or may be attached to the display panel 100. In addition, the touch panel may be configured using various methods such as a self cap method and a mutual method.

When the fingerprint sensor driver 600 supplies a driving signal to the driving electrode unit 560, ultrasonic waves are generated from the piezoelectric material 550, and the ultrasonic waves are, as shown in FIG. 5, the base substrate ( It is transmitted to the outside of the display panel 100 through 520 and the display panel 100.

A fingerprint is formed on the user's finger 20, and the fingerprint includes valleys 21 and ridges 22. There is a height difference between the valleys 21 and the floors 22, and the valleys 21 and the floors 22 are arranged with an inclined surface therebetween.

The receiving electrode 540 is output from the fingerprint sensor 500 and generated by the ultrasonic voltage generated from the receiving electrode 540 by the ultrasonic wave reflected from the valley 21 and the ultrasonic wave reflected from the floor 22. The ultrasonic voltages generated from have different values.

Accordingly, the fingerprint sensor driver 600 may recognize a fingerprint using the ultrasonic voltage generated through the receiving electrode 540.

In this case, the ultrasonic waves generated at the first point A of the fingerprint sensor 500 travel only in a direction perpendicular to the second surface 112 of the display panel 100 and then the second surface 112 It is not reflected only in the direction perpendicular to ). That is, the ultrasonic waves generated at the first point A may travel in various directions inclined with the second surface 112, as shown in FIG. 5, and thus, the second surface 112 and the The receiving electrode 540 may be reached through various inclined directions.

Therefore, the ultrasonic waves received by the receiving electrode 540 corresponding to the first point A are generated not only at the first point A, but also at points other than the first point A. Ultrasound can also be included. In this case, the period during which the reflected ultrasound generated at the first point A is received, and the ultrasound generated at points other than the first point A and received at the first point A is received. The period is different.

The present invention can recognize a fingerprint using the difference in period as described above.

6 is an exemplary view illustrating a principle of driving a display device equipped with a large area fingerprint sensor according to the present invention. Accordingly, the structure of the fingerprint sensor shown in FIG. 6 may not be the same as the structure of the fingerprint sensor applied to the display device equipped with the large area fingerprint sensor according to the present invention. Hereinafter, a basic method and principle of sensing a fingerprint in the fingerprint sensor 500 applied to the present invention will be described with reference to FIG. 6.

As shown in FIG. 6, the fingerprint sensor 500 extends along a first direction, the receiving electrodes 540 independently provided on each of the fingerprint pixels 510, and extends in the first direction. N sensing lines SL connected to the fingerprint pixels provided along the line, m driving electrodes TX1 to TXm extending along a second direction different from the first direction, the second direction M+1 sensing gate lines SGL1 to SGLm+1 extending along the line, fixed voltage lines VDD extending along the first direction, and m resets extending along the second direction The fingerprint formed by lines RSL1 to RSLm, fingerprint common voltage lines VC extending along the first direction, and any one sensing line SL and one sensing gate line SGL It includes three transistors T1, T2, and T3 provided in the pixel 510.

As described above with reference to FIGS. 3 and 4, in the present invention, the driving electrode unit 560 may include driving electrodes TX1 to TXm having a rod shape, or It may be composed of one driving electrode. Hereinafter, for convenience of explanation, as shown in FIGS. 3 and 6, a fingerprint sensor 500 provided with a driving electrode unit 560 including driving electrodes TX1 to TXm having a rod shape is provided. It will be described as an example of. However, the contents described below can be similarly applied to the fingerprint sensor 500 provided with the driving electrode unit 560 including only one driving electrode in the form of a plate.

As described above, three transistors T1, T2, and T3 are provided in the fingerprint pixel 510.

Of the three transistors T1, T2, T3, a gate of a first transistor T1 is connected to a receiving electrode 540 corresponding to the fingerprint pixel 510, and a first terminal is the fixed voltage line ( VDD), and the second terminal is connected to the second terminal of the second transistor T2.

Of the three transistors T1, T2, and T3, a gate of a second transistor T1 is connected to the sensing gate line SGL, a first terminal is connected to the sensing line SL, Terminal 2 is connected to the second terminal of the first transistor T1.

A gate of a third transistor T3 among the three transistors T1, T2, and T3 is connected to a reset line RSL, and a first terminal is connected to a gate of the first transistor T1, The second terminal is connected to the fingerprint common voltage line VC.

In this case, each of the driving electrodes TX1 to TXm is electrically connected to the fingerprint pixels 510 provided in parallel with the driving electrodes TX1 to TXm. When the driving electrode part 560 is composed of one driving electrode, the one driving electrode is electrically connected to all of the fingerprint pixels 510 provided in the fingerprint sensor 500.

The fingerprint sensor driver 600 supplies driving signals to the driving electrodes TX1 to TXm, and a driving unit 610 and the sensing lines for supplying sensing gate signals to the sensing gate lines SGL1 to SGLm. It includes a fingerprint recognition unit 620 for recognizing a fingerprint using sensing signals received from (SL1 to SLn).

The driving unit 610 supplies the sensing gate signals to the driving signal supply unit 611 for supplying the driving signals to the driving electrodes TX1 to TXm and the sensing gate lines SGL1 to SGLm, and the reset And a sensing gate signal supply unit 612 for supplying reset gate signals to the lines RSL1 to RSLm.

The fingerprint recognition unit 620 amplifies the sensing signal received through each of the sensing lines SGL1 to SGLm, for example, converts the amplified sensing signal into a digital value, and constitutes a fingerprint, Floors and slopes (hereinafter, simply referred to as fingerprint information) are recognized according to the size of the digital value, and fingerprint information recognized by all sensing signals are connected to finally recognize a fingerprint.

A receiving electrode driving unit for supplying a receiving electrode voltage to the receiving electrodes 540 or floating the receiving electrodes 540 may be provided in the driving unit 610 or provided in the fingerprint recognition unit 620 It could be. The receiving electrode voltage may be a ground voltage (ground voltage), or may be any one preset voltage. To this end, each of the receiving electrodes 540 may be connected to the receiving electrode driver through a receiving electrode line. However, when the receiving electrodes 540 are maintained only in a floating state, the receiving electrode driver may not be provided.

The basic method or principle of sensing a fingerprint in the fingerprint sensor 500 having the structure as described above is as follows.

First, the driving signal supply unit 611 is supplied with the receiving electrode voltage to the receiving electrodes 540 or the receiving electrodes 540 are floating, the first sensing gate line SLG1 for a preset period. A driving signal is supplied to the first driving electrode TX1 provided in parallel with ).

In this case, a sensing gate off signal is supplied to all sensing gate lines SGL1 to SGLm including the first sensing gate line SGL1.

Here, the sensing gate off signal refers to a signal for turning off transistors connected to the sensing gate line, and a signal for turning on transistors connected to the sensing gate line is referred to as a sensing gate on signal. The sensing gate-on signal and the sensing gate-off signal are collectively referred to as a sensing gate signal.

Accordingly, while the driving signal is supplied to the first driving electrode TX1, the second transistors T2 are turned off, and thus sensing lines SL1 to T2 connected to the second transistors T2 are turned off. SLn) does not transmit a sensing signal.

Next, after the driving signals are supplied, the receiving electrodes 540 may be floated or another voltage may be supplied to the receiving electrodes 540.

Next, voltages of different magnitudes are applied to each of the receiving electrodes 540 by ultrasonic waves received by the receiving electrodes 540 after being output from the first driving electrode TX1 and reflected by the finger. Voltages are generated.

Each of the receiving electrodes 540 is connected to a gate of the first transistor T1 provided in the fingerprint pixel 510. As described above, the ultrasonic voltage generated through the receiving electrode 540 varies depending on the magnitude of the ultrasonic wave received through the receiving electrode 540.

According to the magnitude of the ultrasonic voltage supplied to the gate of the first transistor T1 through the receiving electrode 540, the magnitude of the current passing through the first transistor T1 and applied to the first transistor T1 The magnitude of the voltage varies.

In this case, the sensing gate-on signal is supplied to all of the sensing gate lines SGL1 to SGLm, a reset gate-off signal is supplied to all of the reset lines RSL1 to RSLm, and the fixed voltage line VDD A voltage having a certain magnitude is supplied to the device.

Here, the reset gate-off signal means a signal capable of turning off the transistors connected to the reset lines RSL1 to RSLm. A signal capable of turning on the transistor is referred to as a reset gate-on signal. The reset gate-on signal and the reset gate-off signal are collectively referred to as a reset gate signal RGS.

Accordingly, all of the third transistors T3 constituting the fingerprint pixels 510 provided along the sensing gate lines SGL1 are turned off, and all of the second transistors T2 are turned on.

Accordingly, the magnitude of the current delivered to the fingerprint recognition unit 620 through the sensing line SL or the magnitude of the voltage varies according to the magnitude of the voltage supplied to the gate of the first transistor T1.

The fingerprint recognition unit 620 uses a magnitude of a current or a voltage transmitted through each of the sensing lines SL1 to SLn to provide a fingerprint pixel 510 along the first sensing gate line SGL1. Fingerprint information corresponding to each of them is generated.

For example, among the fingerprint pixels 510 provided along the first sensing gate line SGL1, the gate of the first transistor T1 of the fingerprint pixel 510 connected to the first sensing line SL1 , An ultrasonic voltage generated by ultrasonic waves received by the receiving electrode 540 provided in the fingerprint pixel 510 is supplied.

When the ultrasonic voltage does not turn on the first transistor T1, current and voltage are not supplied to the first sensing line SL1. The fingerprint recognition unit 620 may recognize this state as a valley or a floor.

When the ultrasonic voltage turns on the first transistor T1, a current flows from the first transistor T1 to the second transistor T2 by a fixed voltage applied through the fixed voltage line VDD. In this case, the second transistor T2 is turned on by the sensing gate-on signal supplied through the first sensing gate line SGL1, and thus, the current transmitted from the first transistor T1 is the second It is supplied to the fingerprint recognition unit 620 through the transistor T2 and the first sensing line SL1.

In addition, when the ultrasonic voltage turns on the first transistor T1, a constant voltage is also generated in the first transistor T1, corresponding to the difference between the fixed voltage and the voltage applied to the first transistor T1. The applied voltage is supplied to the fingerprint recognition unit 620 through the second transistor T2 and the first sensing line SL1.

In this case, the magnitude of the current or the voltage supplied to the fingerprint recognition unit 620 through the first transistor T1, the second transistor T2, and the first sensing line SL1 is the ultrasonic wave May vary depending on voltage. That is, the degree to which the first transistor T1 is turned on depends on the magnitude of the ultrasonic voltage, and the magnitude of the current supplied to the fingerprint recognition unit 620 according to the degree to which the first transistor T1 is turned on. Or the magnitude of the voltage is also different.

Accordingly, the fingerprint recognition unit 620 analyzes the magnitude of the current or voltage received through the first sensing line SL1, and provides fingerprint information corresponding to the analysis result, for example, a valley, a floor, or a slope. Recognize.

Through the processes as described above, fingerprint information corresponding to each of the fingerprint pixels 510 provided along the first sensing gate line SGL1 is generated.

Next, the driving signal supply unit 611 is supplied with the receiving electrode voltage again to the receiving electrodes 540 or the receiving electrodes 540 are floating, and the second sensing gate line SLG2 is applied for a predetermined period. A driving signal is supplied to the second driving electrode TX2 provided in parallel with ).

In this case, a sensing gate off signal is supplied to all sensing gate lines SGL1 to SGLm including the second sensing gate line SGL2.

Accordingly, while the driving signal is supplied to the second driving electrode TX2, the second transistors T2 are turned off, and thus, sensing lines SL1 to T2 connected to the second transistors T2 are turned off. SLn) does not transmit a sensing signal.

Next, after the driving signal is supplied, the receiving electrodes 540 may be floated or another voltage may be supplied to the receiving electrodes 540.

Next, ultrasonic voltages of different sizes are generated in each of the receiving electrodes 540 by ultrasonic waves that are output from the second driving electrode TX2 and reflected by the finger and then received by the receiving electrodes 540.

In this case, the sensing gate-on signal is supplied to all of the sensing gate lines SGL1 to SGLm, a reset gate-on signal is supplied to all of the reset lines RSL1 to RSLm, and the fixed voltage line VDD A voltage having a certain magnitude is supplied to the device.

Accordingly, all of the third transistors T3 constituting the fingerprint pixels 510 provided along the second sensing gate line SGL2 are turned off, and all of the second transistors T2 are turned on.

Therefore, as described above, according to the magnitude of the ultrasonic voltage supplied to the gate of the first transistor T1, the magnitude of the current delivered to the fingerprint recognition unit 620 through the sensing line SL Or the magnitude of the voltage varies.

The fingerprint recognition unit 620 uses a magnitude of a current or a voltage delivered through each of the sensing lines SL1 to SLn to provide a fingerprint pixel 510 along the second sensing gate line SGL2. Fingerprint information corresponding to each of them is generated.

Next, the above-described processes are repeated for the third driving electrode TX3 to the m-th driving electrode TXm, so that fingerprint information corresponding to all the fingerprint pixels 510 provided in the fingerprint sensor 500 Can be created.

Next, when fingerprint information is generated for the first driving electrodes TX1 to the m-th driving electrodes TXm through the above processes, the sensing gate signal supply unit 612 is, as shown in FIG. The reset gate-on signal may be simultaneously supplied to the first reset line RSL1 to the m-th reset line RSLm during the period 19P.

Accordingly, the third transistor T3 of each of the fingerprint pixels 510 provided along the first reset line RSL1 to the m-th reset line RSLm is turned on.

A first terminal of the third transistor T3 is connected to the receiving electrode 540, and a second terminal of the third transistor T3 is connected to the fingerprint common voltage line VC. The fingerprint common voltage line VC is connected to a terminal to which a fingerprint common voltage is supplied. The common fingerprint voltage may be a ground voltage (ground voltage), or may be any one preset voltage. The third transistor T3 performs a function of initializing the fingerprint pixel 510 by discharging the charge remaining in the fingerprint pixel 510 through the fingerprint common voltage line VC after fingerprint sensing.

That is, after fingerprint sensing is completed through the above processes, each of the fingerprint pixels 510 is initialized by a reset gate-on signal supplied to the reset lines RSL1 to RSLm and the third transistor T3. Can be.

However, the process of resetting the fingerprint pixels 510 may be performed whenever fingerprint information for fingerprint pixels corresponding to one driving electrode 540 is generated.

For example, the sensing gate signal supply unit 612 generates fingerprint information on fingerprint pixels corresponding to the first driving electrode TX1, and then generates fingerprint information on the fingerprint pixels corresponding to the second driving electrode TX2. Before the fingerprint information is generated, the reset gate-on signal may be supplied to all of the reset lines RSL1 to RSLm. Accordingly, after the fingerprint pixels corresponding to the first driving electrode TX1 are reset, fingerprint information on the pixels corresponding to the second driving electrode TX2 may be generated.

In addition, the sensing gate signal supply unit 612 generates fingerprint information on fingerprint pixels corresponding to the first driving electrode TX1, and then generates fingerprints for fingerprint pixels corresponding to the second driving electrode TX2. When information is generated, the reset gate-on signal may be supplied only to the first reset line RSL1 and the reset gate-off signal may be supplied to the remaining reset lines RSL2 to RSLm. Accordingly, when fingerprint information on the pixels corresponding to the second driving electrode TX2 is generated, only the fingerprint pixels corresponding to the first driving electrode TX1 may be reset.

However, in the following description, for convenience of description, the present invention will be described with the case where the fingerprint pixels are reset at the same time after fingerprint information for all the fingerprint pixels is generated.

Finally, fingerprint information corresponding to all the fingerprint pixels 510 provided in the fingerprint sensor 500 may be generated by the above-described processes.

The fingerprint recognition unit 620 combines the fingerprint information identified through the above processes to generate a single fingerprint.

The driving method when the driving electrode unit 560 is formed of one driving electrode may also include the processes described above. That is, compared to the fingerprint sensor 500 provided with the driving electrode unit 560 including the driving electrodes TX1 to TXm, the fingerprint sensor provided with the driving electrode unit 560 including one driving electrode ( The driving method of 500) differs only in that sequentially input driving signals are provided to the entire surface of the fingerprint sensor 500.

In the fingerprint sensor 500 in which the driving electrode unit 560 has driving electrodes TX1 to TXm having a rod shape, a driving electrode parallel to a sensing gate line to which a fingerprint gate-on signal for fingerprint recognition is supplied is separately Since it can be driven, the fingerprint recognition capability of the fingerprint sensor for each location can be improved. In addition, since each of the driving electrodes TX1 to TXm can be sequentially driven, power consumption can be reduced.

Since the structure of the fingerprint sensor 500 in which the driving electrode part 560 has one driving electrode in the form of a plate is simple, the manufacturing cost of the fingerprint sensor 500 is reduced and the manufacturing process of the fingerprint sensor 500 Can be simplified. In addition, the fingerprint sensor 500 having one driving electrode in the form of a plate does not need to be provided with a complicated circuit for sequentially driving the driving electrodes.

7 is another exemplary view for explaining the principle of driving a display device equipped with a large-area fingerprint sensor according to the present invention, and FIG. 8 is a diagram generated by a fingerprint sensor driver to drive the fingerprint sensor shown in FIG. It is an exemplary diagram showing the waveforms of signals.

In the following, for convenience of explanation, as shown in FIG. 7, a fingerprint sensor having 9 driving electrodes TX1 to TX9, a plurality of receiving electrodes 540 and 16 sensing lines SL1 to SL16 ( 500) is described as an example of the present invention. As described above, each of the receiving electrodes 540 is provided on the fingerprint pixel 510.

In this case, the nine driving electrodes TX1 to TX9 are connected to a driving signal supply unit 611 for supplying the driving signals to the driving electrodes TX1 to TXm, and the 16 sensing lines SL1 to SL16 are connected to a fingerprint recognition unit 620 for recognizing a fingerprint using sensing signals received from the fingerprint sensor 500.

In addition, in the following description, contents identical or similar to those described with reference to FIG. 6 will be omitted or briefly described.

First, the driving signal supply unit 611 is shown in FIG. 8 as the first driving electrode TX1 of the fingerprint sensor 500 having the structure as shown in FIGS. 6 and 7 in the first period 1P. The drive signal as described above is supplied. The driving signal may be composed of at least one pulse. Accordingly, although the driving signal composed of three pulses is shown in FIG. 8, the number of pulses constituting the driving signal may be variously changed. In this case, a sensing gate off signal is supplied to all sensing gate lines SGL1 to SGL9 including the first sensing gate line SGL1.

After the driving signal is supplied, the receiving electrodes 540 are floating or another voltage is supplied to the receiving electrodes 540.

The ultrasonic waves output from the first driving electrode TX1 and reflected by the finger are transmitted toward the first driving electrode TX1 to the third driving electrode TX3.

Next, the sensing gate signal supply unit 612 supplies the sensing gate-on signal to the sensing gate lines SGL1 to SGL16 during a second period 2P generated after the first period 1P, The reset gate-off signal is supplied to the reset lines, and a voltage having a predetermined magnitude is supplied to the fixed voltage line VDD.

Accordingly, all of the third transistors T3 are turned off, and all of the second transistors T2 are turned on.

Therefore, as described above, according to the magnitude of the ultrasonic voltage supplied to the gate of the first transistor T1, the magnitude of the current delivered to the fingerprint recognition unit 620 through the sensing line SL Or the magnitude of the voltage varies.

The fingerprint recognition unit 620 uses a magnitude of a current or a voltage delivered through each of the sensing lines SL1 to SL16 to provide a fingerprint pixel 510 along the first sensing gate line SGL1. Fingerprint information corresponding to each of them is generated.

In this case, that is, during the second period 2P, the fingerprint recognition unit 620 performs three sensing operations using the sampling control signal SAMPS as shown in FIG. 8.

The sensing signal received through the sensing lines SL1 to SL16 by the first sensing operation during the second period 2P is output from the first driving electrode TX1 and then reflected by the user's finger. The sensing lines SL1 to SL16 are generated by receiving ultrasonic waves transmitted to the sensing electrodes at a position corresponding to the first driving electrode TX1, and are performed by a second sensing operation during the second period 2P. The sensing signal received through is reflected by the user's finger after being output from the first driving electrode TX1 and transmitted to the sensing electrodes at a position corresponding to the second driving electrode TX2. Is generated, and the sensing signal received through the sensing lines SL1 to SL16 by the third sensing operation during the second period 2P is output from the first driving electrode TX1 and then applied to the user's finger. It is generated by the received ultrasonic waves reflected by and transmitted to the sensing electrodes at a position corresponding to the third driving electrode TX3.

The interval and width of the three pulses constituting the sampling control signal SAMPS are output from and received from the first driving electrode TX1 to the third driving electrode TX3, and then transmitted to the first driving electrode TX1. It can be set in various ways by using the spacing and width of ultrasonic waves received by the corresponding receiving electrodes.

That is, the fingerprint recognition unit 620 uses the three sensing operations as described above, and the fingerprint pixels 510 provided along the first sensing gate line SGL1 to the third sensing gate line SGL3 Sensing information corresponding to each of them is generated.

Next, the driving signal supply unit 611 supplies a driving signal to the second driving electrode TX2 in the third period 3P. In this case, a sensing gate off signal is supplied to all sensing gate lines SGL1 to SGL9 including the first sensing gate line SGL1.

The ultrasonic waves output from the second driving electrode TX2 and reflected by the finger are transmitted to the first driving electrode TX1 to the fourth driving electrode TX4.

Next, the sensing gate signal supply unit 612 supplies the sensing gate-on signal to the sensing gate lines SGL1 to SGL9 during a fourth period 4P generated after the third period 3P, The reset gate-off signal is supplied to the reset lines, and a voltage having a predetermined magnitude is supplied to the fixed voltage line VDD.

Accordingly, all of the third transistors T3 are turned off, and all of the second transistors T2 are turned on.

During the fourth period (4P), the fingerprint recognition unit 620 performs three sensing operations using the sampling control signal SAMPS as illustrated in FIG. 8, and thus the second sensing gate line SGL2 Sensing information corresponding to each of the fingerprint pixels 510 provided along the line is generated.

That is, the sensing signal received through the sensing lines SL1 to SL16 by the first sensing operation during the fourth period 4P is output from the second driving electrode TX2 and then reflected by the user's finger. Is generated by receiving ultrasonic waves transmitted to the sensing electrodes at a position corresponding to the second driving electrode TX2, and is generated by the second sensing operation during the fourth period 4P. The sensing signal received through the SL16 is output from the second driving electrode TX2 and then reflected by the user's finger, and is positioned at a position corresponding to the first driving electrode TX1 and the third driving electrode TX3. The sensing signal generated by the received ultrasonic waves transmitted to the sensing electrodes and received through the sensing lines SL1 to SL16 by the third sensing operation during the fourth period 4P is the second driving electrode After being output from (TX2), it is reflected by the user's finger and generated by receiving ultrasonic waves transmitted to the sensing electrodes at a position corresponding to the fourth driving electrode TX4.

In this case, in FIG. 7, since there is no driving electrode at the top of the first driving electrode TX1 and the second driving electrode TX2 and the third driving electrode TX3 are provided only at the bottom, the second period ( In the second sensing operation and the third sensing operation of 2P), only the sensing signal by ultrasonic waves received at a position corresponding to one driving electrode (the second driving electrode TX2 or the third driving electrode TX3) is used. do.

However, since the first driving electrode TX1 is provided on the upper end of the second driving electrode TX2 and the third driving electrode TX3 and the fourth driving electrode TX4 are provided at the lower end, the fourth In the second sensing operation of the period 4P, a sensing signal by received ultrasonic waves received at positions corresponding to the first driving electrode TX1 and the third driving electrode TX3 is used, and the fourth period 4P In the third sensing operation of ), only a sensing signal by ultrasonic waves received at a position corresponding to the fourth driving electrode TX4 is used.

That is, since the first driving electrode TX1 and the third driving electrode TX3 are spaced apart at the same interval based on the second driving electrode TX2, the output from the first driving electrode TX2 is The ultrasonic waves are received at positions corresponding to the first driving electrode TX1 and the third driving electrode TX3 in the same period, and therefore, in the second sensing operation of the fourth period 4P, the first driving electrode A sensing signal by ultrasonic waves received at positions corresponding to TX1 and the third driving electrode TX3 is used.

However, since there is no driving electrode spaced at the same interval as the fourth driving electrode TX4 with respect to the second driving electrode TX2, the fourth sensing operation is performed in the third sensing operation of the fourth period 4P. Only a sensing signal by ultrasonic waves received at a position corresponding to the driving electrode TX4 is used.

In other words, the fingerprint recognition unit 620 uses the three sensing operations as described above to determine the first sensing gate line SGL1 to the fourth sensing gate line SGL4 during the fourth period 4P. Accordingly, sensing information corresponding to each of the provided fingerprint pixels 510 is generated.

Next, the driving signal supply unit 611 supplies a driving signal to the third driving electrode TX3 in a fifth period 5P. In this case, a sensing gate off signal is supplied to all sensing gate lines SGL1 to SGL9 including the third sensing gate line SGL3.

The ultrasonic waves output from the third driving electrode TX3 and reflected by the finger are transmitted to the first driving electrode TX1 to the third driving electrode TX5.

Next, the driving signal supply unit 611 supplies the sensing gate-on signal to the sensing gate lines SGL1 to SGL9 during a sixth period 6P generated after the fifth period 5P, and the The reset gate-off signal is supplied to reset lines, and a voltage having a predetermined magnitude is supplied to the fixed voltage line VDD.

Accordingly, all of the third transistors T3 are turned off, and all of the second transistors T2 are turned on.

During the sixth period (6P), the fingerprint recognition unit 620 performs three sensing operations using the sampling control signal SAMPS as illustrated in FIG. 8, so that the first sensing gate line SGL1 To generating sensing information corresponding to each of the fingerprint pixels 510 provided along the fifth sensing gate line SGL5.

That is, the sensing signal received through the sensing lines SL1 to SL16 by the first sensing operation during the sixth period 6P is output from the third driving electrode TX3 and then reflected by the user's finger. Is generated by receiving ultrasonic waves transmitted to the sensing electrodes at a position corresponding to the third driving electrode TX3, and is generated by the second sensing operation during the sixth period 6P. The sensing signal received through the SL16 is output from the third driving electrode TX3 and then reflected by the user's finger, and is positioned at a position corresponding to the second driving electrode TX2 and the fourth driving electrode TX4. The sensing signal generated by the received ultrasonic waves transmitted to the sensing electrodes and received through the sensing lines SL1 to SL16 by the third sensing operation during the sixth period 6P is the third driving electrode After being output from (TX3), it is reflected by the user's finger and generated by the received ultrasonic waves reflected by the sensing electrodes at positions corresponding to the first driving electrode TX1 and the fifth driving electrode TX5. .

The first driving electrode TX1 and the second driving electrode TX2 are provided at an upper end of the third driving electrode TX3, and the fourth driving electrode TX4 and the fifth driving electrode TX5 are provided at a lower end. Is provided, in the second sensing operation of the sixth period 6P, a sensing signal by ultrasonic waves received at positions corresponding to the second driving electrode TX1 and the fourth driving electrode TX4 is used. In the third sensing operation of the sixth period 6P, a sensing signal by ultrasonic waves received at positions corresponding to the first driving electrode TX1 and the fifth driving electrode TX5 is used.

That is, since the second driving electrode TX2 and the fourth driving electrode TX4 are spaced apart at the same interval based on the third driving electrode TX3, the output from the third driving electrode TX3 The ultrasonic waves are received at positions corresponding to the second driving electrode TX2 and the fourth driving electrode TX4 in the same period, and thus, the second driving in the second sensing operation of the sixth period 6P. A sensing signal by ultrasonic waves received at a position corresponding to the electrode TX2 and the fourth driving electrode TX4 is used.

In addition, since the first driving electrode TX1 and the fifth driving electrode TX5 are spaced apart at the same interval based on the third driving electrode TX3, the output from the third driving electrode TX3 is The ultrasonic waves are received at positions corresponding to the first driving electrode TX1 and the fifth driving electrode TX5 in the same period, and therefore, in the third sensing operation of the sixth period 6P, the first driving electrode A sensing signal by ultrasonic waves received at positions corresponding to TX1 and the fifth driving electrode TX5 is used.

In other words, the fingerprint recognition unit 620 uses the three sensing operations as described above to determine the first sensing gate line SGL1 to the fifth sensing gate line SGL5 during the sixth period 6P. Accordingly, sensing information corresponding to each of the provided fingerprint pixels 510 is generated.

Next, the operations performed in the fifth period 5P and the sixth period 6P are performed by the same principle in the fourth driving electrodes TX4 to the seventh driving electrodes TX7.

Accordingly, in the seventh period 7P and the eighth period 8P, sensing corresponding to each of the fingerprint pixels 510 provided along the second sensing gate line SGL2 to the sixth sensing gate line SGL6 Information is generated and corresponds to each of the fingerprint pixels 510 provided along the third sensing gate line SGL3 to the seventh sensing gate line SGL7 in the ninth period 9P and the tenth period 10P. Sensing information is generated, and in the eleventh period 11P and the 12th period 12P, each of the fingerprint pixels 510 provided along the fourth sensing gate line SGL4 to the eighth sensing gate line SGL8 The sensing information corresponding to is generated, and in the 13th period 13P and the 14th period 14P, the fingerprint pixel 510 provided along the fifth sensing gate line SGL5 to the ninth sensing gate line SGL9 Sensing information corresponding to each of them is generated.

Next, the operation performed in the third period 3P and the fourth period 4P is performed on the same principle in the fifteenth period 15P and the sixteenth period 16P.

That is, in the fifteenth period 15P and the sixteenth period 16P, four driving electrodes, that is, the ultrasonic waves received at positions corresponding to the sixth driving electrodes TX6 to the ninth driving electrodes TX9, are Accordingly, sensing information corresponding to each of the fingerprint pixels 510 provided along the sixth sensing gate line SGL6 to the ninth sensing gate line SGL9 is generated.

Next, the operation performed in the first period 1P and the second period 2P is performed on the same principle in the 17th period 17P and the 18th period 18P.

That is, in the seventeenth period 17P and the eighteenth period 18P, three driving electrodes, that is, the ultrasonic waves received at positions corresponding to the seventh driving electrodes TX7 to the ninth driving electrodes TX9, are Accordingly, sensing information corresponding to each of the fingerprint pixels 510 provided along the seventh sensing gate line SGL7 to the ninth sensing gate line SGL9 is generated.

Next, the reset process described above with reference to FIG. 6 is performed.

That is, after the above processes are performed, reset gate-on signals are received by the reset lines, and accordingly, the third transistors T3 provided in the fingerprint pixels 510 are turned on. Accordingly, charges remaining in the fingerprint pixels 510 may be discharged to the fingerprint common voltage line VC through the third transistor T3.

However, as described above, the reset process may be performed at various timings.

Finally, the fingerprint recognition unit 620 generates fingerprint information corresponding to each of the sensing gate lines by using the sensing information identified through the above processes, and combines the fingerprint information to generate a single fingerprint.

The fingerprint recognition unit 620 may determine whether the fingerprint matches the reference fingerprint by comparing the fingerprint with the reference fingerprint stored in the storage unit 630.

The result of determining whether the fingerprint matches the reference fingerprint is an application executed on various electronic devices using a display device equipped with a fingerprint sensor according to the present invention, for example, a smartphone, a tablet PC, a monitor, a TV, etc. Can be used for

For example, when an application running on a smartphone requires user authentication using a fingerprint, the smartphone may perform user authentication according to a determination result transmitted from the fingerprint recognition unit 620.

That is, as described above with reference to FIG. 5, the ultrasonic waves output from the first point A are not reflected only to the receiving electrode where the first point A is located, but the first point ( A) It can be reflected by other receiving electrodes around it.

Accordingly, the present invention may generate sensing information by receiving ultrasonic waves output from one location at at least three or more locations. In this case, sensing information output from at least three or more positions and received sensing information may be generated at a position corresponding to one sensing gate line. In this case, the present invention may generate fingerprint information at a position corresponding to the one sensing gate line by using at least three sensing information matching a position corresponding to one sensing gate line.

The fact that there are many ultrasonic waves used to generate fingerprint information means that there are many data that can be used for analysis, which can improve fingerprint recognition capability. That is, fingerprint information generated using ultrasound output from various locations may include information more consistent with an actual fingerprint of a user than fingerprint information generated using only ultrasound output from any one location.

According to the present invention as described above, since the sensing gate lines provided in the fingerprint sensor can be driven at the same time, the configuration of the circuit for driving the sensing gate lines can be simplified, and accordingly, the manufacturing cost of the display device This can be reduced and the manufacturing process can be simplified.

9 is an exemplary view illustrating a method of dividing fingerprint pixels into groups of a display device equipped with a large area fingerprint sensor according to the present invention.

In the present invention, the fingerprint pixels 510 are divided into at least two groups, and receiving electrodes 540 corresponding to the fingerprint pixels 510 provided at the same position in each group are electrically connected.

For example, in the fingerprint sensor shown in FIG. 9, the fingerprint pixels 510 are divided into w groups (G1 to Gw), and each of the w groups (G1 to Gw) includes 100 fingerprint pixels 510 ) Are provided. The 100 fingerprint pixels 510 are indicated by (1,1) to (10,10). Here, w is an even number of 2 or more.

More specifically, the fingerprint pixels 510 provided in the fingerprint sensor 500 may be divided into a first group G1 to a w group Gw, as illustrated in FIG. 9. In this case, the first fingerprint pixels (1, 1) to the 100th fingerprint pixels (10, 10) are provided in the first group (G1), and the first fingerprint pixels (1,1) to the second group (G2) The 100th fingerprint pixels 10 and 10 are provided, and the first fingerprint pixels 1 and 1 to the 100th fingerprint pixels 10 and 10 are also provided in the w-th group Gw.

Each of the fingerprint pixels 510 may include the components described in FIG. 6.

The number of groups and the number of fingerprint pixels 510 provided in each of the groups may be variously changed according to the size and resolution of the fingerprint sensor 500.

10 is an exemplary view showing a connection relationship between fingerprint pixels shown in FIG. 9.

When the fingerprint pixels 510 provided in the fingerprint sensor 500 are divided into a shape as shown in FIG. 9, the receiving electrodes corresponding to the fingerprint pixels provided at the same position in each group are electrically connected to each other. have.

For example, in FIGS. 6, 9 and 10, the receiving electrodes 540 corresponding to the first fingerprint pixels 1 and 1 provided in the first group G1 to the tenth group G10 are horizontal. Receiving electrodes 540 that are electrically connected through the connection line HCL and corresponding to the first fingerprint pixels 1 and 1 provided in the eleventh group G11 to the twentieth group G20 are Receiving electrodes that are electrically connected through the horizontal connection line HCL and corresponding to the first fingerprint pixels 1 and 1 provided in the w-9 group Gw-9 to the w group Gw The 540 are electrically connected through another horizontal connection line HCL.

That is, the receiving electrodes corresponding to the first fingerprint pixels 1 and 1 provided in the adjacent groups along the second direction parallel to the sensing gate lines are electrically connected through the horizontal connection lines HCL. have.

In this case, receiving electrodes corresponding to the first fingerprint pixels 1 and 1 provided in groups arranged in a first direction parallel to the sensing lines may be electrically connected through vertical connection lines VCL. .

To further explain, as shown in FIGS. 6, 9, and 10, receiving electrodes corresponding to the first fingerprint pixels 1 and 1 provided in the first group G1 to the tenth group G10 A horizontal connection line (HCL) that electrically connects them, and a horizontal connection that electrically connects receiving electrodes corresponding to the first fingerprint pixels (1, 1) provided in the 11th group (G11) to the 20th group (G20) A horizontal connection line HCL electrically connecting the line HCL and receiving electrodes corresponding to the first fingerprint pixels 1 and 1 provided in the w-9 group Gw-9 to the w group Gw ) May be electrically connected through a vertical connection line VCL provided in parallel with the sensing line SL.

Accordingly, all of the receiving electrodes corresponding to the first fingerprint pixels 1 and 1 provided in each of the groups of the fingerprint sensor 500 may be electrically connected.

In this case, only one vertical connection line VCL may be provided as shown in FIG. 10, but two or more vertical connection lines VCL may be provided in consideration of resistance and the like. That is, at least one vertical connection line VCL for electrically connecting the receiving electrodes at the same position may be provided in the fingerprint sensor 500.

According to the principle as described above, the reception electrodes corresponding to the second fingerprint pixels 1 and 2 provided in the first group G1 to the w group Gw are also the horizontal connection line HCL. And the vertical connection lines VCL may be electrically connected.

Accordingly, the receiving electrodes corresponding to the rth fingerprint pixels provided in the first group G1 to the wth group Gw are also electrically connected by the horizontal connection lines HCL and the vertical connection lines VCL. Can be connected to.

In this case, the number of the sensing lines SL may be the same as the number of fingerprint pixels provided along the sensing gate lines in any one of the groups, as shown in FIG. 10.

For example, as shown in FIG. 9, when the number of fingerprint pixels 510 provided along the sensing gate line in the first group G1 is 10, a large-area fingerprint sensor according to the present invention is provided. In the displayed display device, ten sensing lines SL may be connected to the fingerprint recognition unit 620.

That is, according to the present invention, the number of sensing lines SL may be equal to the number of fingerprint pixels 510 provided along the sensing gate line in one group. Accordingly, the number of sensing lines may be reduced compared to a case where the same number of sensing lines as the number of fingerprint pixels provided along the sensing gate line is required. Accordingly, the number of channels provided in the fingerprint recognition unit 620 may be reduced, the configuration of the fingerprint recognition unit 620 may be simplified, and the size of the fingerprint recognition unit 620 may be reduced. Accordingly, the size of the bezel of the region where the fingerprint recognition unit 620 is provided or the size of the bezel provided with the pad unit to which the fingerprint recognition unit 620 is connected may be reduced.

In this case, the sensing line SL may be connected only to the fingerprint pixels 510 provided in the first group G1, as shown in FIG. 10, but as shown in FIG. 6, the sensing line ( It may also be connected to the fingerprint pixels 510 provided in groups provided in parallel with the first group G1 along SL).

To further explain, the number of sensing lines SL is smaller than the number of fingerprint pixels provided along the second direction.

Particularly, in the present invention, the number of the sensing lines SL may be equal to the number of fingerprint pixels provided along the sensing gate lines in any one of the groups.

In addition, the sensing lines SL are provided in groups adjacent to each other along the first direction among the groups, as shown in FIG. 10.

In this case, the sensing lines may be provided in any one of the groups adjacent to each other along the second direction.

For example, in FIGS. 9 and 10, the sensing lines SL are adjacent groups along the first group G1, the eleventh group G11, and the w-9th group Gw-9. However, the sensing lines SL may be provided in groups adjacent to the second group G2, the twelfth group G12, and the w-8th group Gw-8, It may be provided in groups adjacent to the tenth group G10, the twentieth group G20, and the wth group Gw.

However, the sensing lines SL may be distributed and provided in at least two groups of adjacent groups along the second direction.

For example, the sensing lines connected to the first fingerprint pixels 1 and 1 of each group are adjacent to each other along the first group G1, the eleventh group G11, and the w-9th group Gw-9. The sensing lines provided in the existing groups and connected to the second fingerprint pixels 1 and 2 of each group include the second group G2, the twelfth group G12, and the w-8th group Gw-8. The sensing lines are provided in adjacent groups and connected to the first fingerprint pixels 1 and 10 of each group along the 10th group G10, the 20th group G20, and the wth group Gw. It may be provided along adjacent groups.

The fingerprint sensor 500 may be provided with at least one dummy sensing line (DSL) not connected to the fingerprint sensor driver, as shown in FIG. 10. That is, the dummy sensing line DSL performs a function of allowing the structure of the fingerprint sensor 500 to be identical or similar in all locations.

The sensing line SL is connected to at least one of the fingerprint pixels provided at the same position in the groups provided along the sensing line. For example, in FIG. 10, among the first fingerprint pixels 1 and 1, only the first fingerprint pixel provided in the first group G1 is connected to the sensing line, but the first fingerprint pixel provided in the first group G1 One fingerprint pixel (1, 1) and the first fingerprint pixels (1, 1) provided in the eleventh group (G11) may be connected to one sensing line.

Hereinafter, a method of generating a fingerprint by a display device having a large area fingerprint sensor according to the present invention will be described with reference to FIGS. 1 to 13. Accordingly, in the following description, contents identical or similar to those described with reference to FIGS. 1 to 10 will be omitted or briefly described.

In this case, as described above, the sensing lines SL may be provided in various forms. However, hereinafter, for convenience of description, as illustrated in FIG. 10, the sensing lines SL are a fingerprint sensor connected to the fingerprint pixels 510 provided in the first group G1. The present invention is described below.

FIG. 11 is an exemplary view showing a touched area in a display device equipped with a large-area fingerprint sensor according to the present invention, FIG. 12 is an enlarged exemplary view of a touched area in FIG. 11, and FIG. It is an exemplary diagram for explaining a method of recognizing a fingerprint in a touched area.

First, when a fingerprint recognition process is executed by an application of an electronic device (for example, a smartphone, a tablet PC, etc.) including a display device equipped with a large-area fingerprint sensor according to the present invention, the electronic device is controlled. The external system may transmit a control signal notifying that the fingerprint recognition process has been executed to the controller 400.

In this case, the controller 400 transmits, to the fingerprint sensor driver 600, a fingerprint sensor control signal FCS indicating that a fingerprint recognition process has been executed. The driver 610 and the fingerprint recognition unit 620 that have received the fingerprint sensor control signal FCS may perform a preparation procedure for fingerprint recognition.

Next, when a user's finger is in contact with the touch panel 800, the touch driver 700 touches the user's fingerprint (an area indicated by XY in FIG. 12) to provide information on the touch position, that is, touch Generate location information (TSI). The touch location information (TSI) includes information on X coordinates and Y coordinates of the touch location.

The touch location information (TSI) is transmitted to the fingerprint recognition unit 620.

Next, when the above processes are completed, the driving signal supply unit 611 supplies a driving signal to the driving electrode unit 560 as described with reference to FIGS. 6 to 8. That is, in the present invention, the driving method described with reference to FIG. 6 may be applied, the driving method described with reference to FIGS. 7 and 8 may be applied, and various other driving methods may be applied. Hereinafter, for convenience of explanation, a display device in which the driving method described with reference to FIG. 6 is executed in the fingerprint sensor having the structure shown in FIGS. 9 to 12 will be described as an example of the present invention.

For example, when the fingerprint sensor 500 is configured as shown in Figs. 9 and 10, the driving signal supply unit 611 is, during the first period, the first group G1 to the tenth group G10. 1 A driving signal is supplied to the first driving electrode TX1 provided parallel to the fingerprint pixels 1 and 1. That is, each of the driving electrodes described below corresponds to fingerprint pixels provided in parallel in the first group G1 to the tenth group G10 among the fingerprint pixels shown in FIGS. 9, 10 and 12. . Accordingly, in regions corresponding to the first group G1, the second group G2, the eleventh group G11, and the twelfth group G12 shown in FIG. 12, 20 driving electrodes TX1 to TX20 It is provided in a direction parallel to the first group G1 and the second group G2, or in a direction parallel to the eleventh group G11 and the twelfth group G12.

To further explain, the first driving electrode TX1 is from the first fingerprint pixels 1 and 1 of the first group G1 shown in FIG. 12 to the tenth fingerprint pixels 1 and 10 of the second group G2. ), and the second driving electrode TX2 corresponds to the twentieth fingerprint pixels 2 and 10 of the second group G2 from the eleventh fingerprint pixels 2 and 1 of the first group G1 The tenth driving electrode TX10 is provided to correspond to the 100th fingerprint pixels 10 and 10 of the second group G2 from the 91st fingerprint pixels 10 and 1 of the first group G1. .

In addition, the eleventh driving electrode TX11 is provided to correspond to the tenth fingerprint pixels 1 and 10 of the twelfth group G12 from the first fingerprint pixels 1 and 1 of the eleventh group G1, and The 12 driving electrode TX12 is provided to correspond to the twelfth fingerprint pixels 2 and 10 of the twelfth group G2 from the eleventh fingerprint pixels 2 and 1 of the eleventh group G11, and the 20th driving electrode The (TX20) is provided to correspond to the 100th fingerprint pixels 10 and 10 of the 12th group G2 from the 91st fingerprint pixels 10 and 1 of the 11th group G11.

In this case, in Fig. 12, for the sake of simplification of the drawing, the driving electrodes are briefly shown, but the driving electrodes extend along the fingerprint pixels. That is, the first to tenth driving electrodes TX1 to TX10 extend from the first group G1 to the tenth group G10, and the eleventh to twentieth driving electrodes TX11 to TX20 are eleventh. It extends from the group G11 to the twentieth group G20.

In addition, the fingerprint sensor 500 is provided with first to twentieth sensing gate lines corresponding to each of the first to twentieth driving electrodes.

Next, the sensing gate signal supply unit 612 supplies the sensing gate-on signal to the sensing gate lines for a second period, the reset gate-off signal to the reset lines, and the fixed voltage line ( VDD) is supplied with a voltage having a certain magnitude.

The fingerprint recognition unit 620 uses a magnitude of a current or a voltage transmitted through each of the sensing lines SL as shown in FIG. 10 to provide a fingerprint pixel 510 along the first driving electrode. ) Generate fingerprint information corresponding to each of them.

In this case, as shown in FIG. 12, the first driving electrode TX1, that is, the first fingerprint pixels 1, 1 to the tenth fingerprint pixels 1, 10 and the first group G1 The user's finger was not touched in the area corresponding to the first fingerprint pixels (1, 1) to the tenth fingerprint pixels (1, 10) of the group G2, and thus, the sensing signal received in the second period Fingerprint information related to the user's fingerprint (XY) is not generated by the user.

Next, the driving signal supply unit 611 supplies a driving signal to the second driving electrode in a third period. In this case, a sensing gate off signal is supplied to all sensing gate lines.

Next, the sensing gate signal supply unit 612 supplies the sensing gate-on signal to the sensing gate lines for a fourth period, the reset gate-off signal to the reset lines, and the fixed voltage line ( VDD) is supplied with a voltage having a certain magnitude.

The fingerprint recognition unit 620 uses a magnitude of a current or a voltage transmitted through each of the sensing lines SL as shown in FIG. 10 to provide a fingerprint pixel 510 along the first driving electrode. ) Generate fingerprint information corresponding to each of them.

In this case, as shown in FIG. 12, the second driving electrode TX2, that is, the eleventh fingerprint pixels 2, 1 to the twentieth fingerprint pixels 2, 10 and the first group G1 The user's finger was not touched in the area corresponding to the eleventh fingerprint pixels (2, 1) to the twentieth fingerprint pixels (2, 10) of the second group (G2), and thus the sensing signal received in the second period Fingerprint information related to the user's fingerprint (XY) is not generated by the user.

Next, during the fifth to tenth periods, the operations of the first to second periods are repeated.

In this case, as shown in FIG. 12, the third driving electrode TX3, that is, the 21st fingerprint pixels 3, 1 to the 30th fingerprint pixels 3, 10 and the second of the first group G1 The user's finger was not touched in the region corresponding to the 21st to 30th fingerprint pixels 3, 1 to 3, 10 of the group G2, and thus, sensing signals received in the sixth period Fingerprint information related to the user's fingerprint (XY) is not generated by

In addition, the fourth driving electrode TX4, that is, the 31st fingerprint pixels 4,1 to 40th fingerprint pixels 4 and 10 of the first group G1 and the 31st fingerprint pixel of the second group G2 The user's finger was not touched in the area corresponding to the (4,1) to 40th fingerprint pixels (4, 10), and therefore, the user's fingerprint (XY) by sensing signals received in the eighth period Fingerprint information related to is not generated.

In addition, the fifth driving electrode TX5, that is, the 41st fingerprint pixels 5 and 1 to the 50th fingerprint pixels 5 and 10 of the first group G1 and the 41st fingerprint pixel of the second group G2 The user's finger was not touched in the area corresponding to the (5,1) to 50th fingerprint pixels (5, 10), and therefore, the user's fingerprint (XY) by sensing signals received in the tenth period Fingerprint information related to is not generated.

Next, the driving signal supply unit 611 supplies a driving signal to the sixth driving electrode TX6 in the eleventh period. In this case, a sensing gate off signal is supplied to all sensing gate lines.

Next, the sensing gate signal supply unit 612 supplies the sensing gate-on signal to the sensing gate lines for a twelfth period, the reset gate-off signal to the reset lines, and the fixed voltage line ( VDD) is supplied with a voltage having a certain magnitude.

The fingerprint recognition unit 620 uses a magnitude of a current or a voltage transmitted through each of the sensing lines SL as shown in FIG. 10 to provide a fingerprint pixel 510 along the first driving electrode. ) Generate fingerprint information corresponding to each of them.

In this case, as shown in FIG. 12, the sixth driving electrode TX6, that is, the 51st fingerprint pixels 6,1 to 60th fingerprint pixels 6,10 and the first group G1 The user's finger is touched in the area corresponding to the 51st to the 60th fingerprint pixels 6 and 10 of the second group G2. Accordingly, fingerprint information related to the user's fingerprint XY is generated by the sensing signals received in the second period.

In particular, among the fingerprint pixels corresponding to the sixth driving electrode TX6, the 58th fingerprint pixels 6 and 8 of the first group G1, the 59th fingerprint pixels 6 and 9, and the 60th fingerprint pixel ( 6,10), and in the 51st fingerprint pixels (6,1), 52nd fingerprint pixels (6,2) and 53rd fingerprint pixels (6,3) of the second group (G2), the user's fingerprint (XY) is Integrated touch.

Therefore, it is generated by the ultrasonic voltage generated from the sensing electrodes of the 58th fingerprint pixels 6 and 8, the 59th fingerprint pixels 6 and 9, and the 60th fingerprint pixels 6 and 10 of the first group G1. The sensed signals are recognized by the sensing lines connected to the 58th fingerprint pixels 6 and 8, the 59th fingerprint pixels 6 and 9 and the 60th fingerprint pixels 6 and 10 of the first group G1. It is supplied to the unit 620, and the fingerprint recognition unit 620 uses the sensing signals to generate fingerprint information on the fingerprint pixels.

In this case, the sensing electrodes of the 51st fingerprint pixels 6 and 1 of the second group G2, the 52nd fingerprint pixels 6 and 2 and the 53rd fingerprint pixels 6 and 3 are of the first group G1. The sensing electrodes of the 51st fingerprint pixels 6 and 1, the 52nd fingerprint pixels 6 and 2 and the 53rd fingerprint pixels 6 and 3 are connected to each other.

Accordingly, the ultrasonic voltage generated from the sensing electrodes of the 51st fingerprint pixels 6 and 1, the 52nd fingerprint pixels 6 and 2 and the 53rd fingerprint pixels 6 and 3 of the second group G2 is the first It is also supplied to the sensing electrodes of the 51st fingerprint pixels 6 and 1, the 52nd fingerprint pixels 6 and 2 and the 53rd fingerprint pixels 6 and 3 of the group G1.

In this case, as shown in FIG. 10, the 51st fingerprint pixels 6 and 1, the 52nd fingerprint pixels 6 and 2 and the 53rd fingerprint pixels 6 and 3 of the second group G2 are sensing lines. And the 51st fingerprint pixels 6 and 1 of the first group G1, the 52nd fingerprint pixels 6 and 2, and the 53rd fingerprint pixels 6 and 3 are connected to the sensing lines. Therefore, the ultrasonic voltage generated from the sensing electrodes of the 51st fingerprint pixels 6 and 1, the 52nd fingerprint pixels 6 and 2 and the 53rd fingerprint pixels 6 and 3 of the second group G2 is Supplied to the fingerprint recognition unit 620 through sensing lines connected to the 51st fingerprint pixels (6, 1), 52nd fingerprint pixels (6, 2) and 53rd fingerprint pixels (6, 3) of the first group (G1) do. The fingerprint recognition unit 620 uses the sensing signals to generate fingerprint information on the fingerprint pixels.

In this case, the fingerprint information substantially corresponds to the 51st fingerprint pixel (6,1), the 52nd fingerprint pixel (6,2) and the 53rd fingerprint pixel (6,3) of the second group (G2). Since the sensing signals were received through the sensing lines connected to the 51st fingerprint pixels 6 and 1, the 52nd fingerprint pixels 6 and 2 and the 53rd fingerprint pixels 6 and 3 of the first group G1, the The fingerprint recognition unit 620 stores the fingerprint information corresponding to the 51st fingerprint pixels 6 and 1, the 52nd fingerprint pixels 6 and 2, and the 53rd fingerprint pixels 6 and 3 of the first group G1. It is recognized as.

Next, the driving signal supply unit 611 supplies a driving signal to the seventh driving electrode TX7 in the thirteenth period. In this case, a sensing gate off signal is supplied to all sensing gate lines.

Next, the sensing gate signal supply unit 612 supplies the sensing gate-on signal to the sensing gate lines for a 14th period, supplies the reset gate-off signal to the reset lines, and supplies the fixed voltage line ( VDD) is supplied with a voltage having a certain magnitude.

In this case, as shown in FIG. 12, the seventh driving electrode TX7, that is, the 61st fingerprint pixels 7 and 1 to the 70th fingerprint pixels 7, 10 and the first group G1 The user's fingerprint XY is touched on an area corresponding to the 61st to the 70th fingerprint pixels 7 and 10 of the second group G2. Accordingly, fingerprint information related to a user's fingerprint is generated by the sensing signals received in the 14th period.

In particular, among the fingerprint pixels corresponding to the seventh driving electrode TX7, the 67th fingerprint pixels 7 and 7 of the first group G1, the 68th fingerprint pixels 7 and 8, and the 69th fingerprint pixel ( 7,9) and the 70th fingerprint pixel (7,10), the 61st fingerprint pixel (7,1) of the second group (G2), the 62nd fingerprint pixel (7,2), the 63rd fingerprint pixel (7, 3) and the 64th fingerprint pixels 7 and 4 are integrated with the user's finger.

Therefore, sensing of the 67th fingerprint pixels (7,7), the 68th fingerprint pixels (7,8), the 69th fingerprint pixels (7,9) and the 70th fingerprint pixels (7,10) of the first group (G1) The sensing signals generated by the ultrasonic voltage generated from the electrodes are the 67th fingerprint pixels 7 and 7 of the first group G1, the 68th fingerprint pixels 7 and 8, and the 69th fingerprint pixels 7,9. ) And sensing lines connected to the 70th fingerprint pixels 7 and 10 to the fingerprint recognition unit 620. The fingerprint recognition unit 620 uses the sensing signals to generate fingerprint information on the fingerprint pixels.

In this case, the 61st fingerprint pixels (7,1), the 62nd fingerprint pixels (7,2), the 63rd fingerprint pixels (7,3), and the 64th fingerprint pixels (7,4) of the second group (G2) The sensing electrodes are of the 61st fingerprint pixel (7,1), the 62nd fingerprint pixel (7,2), the 63rd fingerprint pixel (7,3) and the 64th fingerprint pixel (7,4) of the first group (G1). It is connected to the sensing electrodes.

Therefore, sensing of the 61st fingerprint pixels 7 and 1, the 62nd fingerprint pixels 7, 2, the 63rd fingerprint pixels 7, 3 and the 64th fingerprint pixels 7 and 4 of the second group G2 The ultrasonic voltage generated from the electrodes is the 61st fingerprint pixel (7,1), the 62nd fingerprint pixel (7,2), the 63rd fingerprint pixel (7,3) and the 64th fingerprint pixel ( It is also supplied to the sensing electrodes of 7,4).

In this case, as shown in FIG. 10, the 61st fingerprint pixels 7 and 1, the 62nd fingerprint pixels 7 and 2, the 63rd fingerprint pixels 7 and 3, and the 64th fingerprint pixels of the second group G2 The fingerprint pixels 7 and 4 are not connected to the sensing lines, and the 61st fingerprint pixels 7 and 1 of the first group G1, the 62nd fingerprint pixels 7, 2 and the 63rd fingerprint pixels 7 Since the ,3) and the 64th fingerprint pixels 7 and 4 are connected to the sensing lines, the 61st fingerprint pixels 7 and 1 and the 62nd fingerprint pixels 7 and 2 of the second group G2, The ultrasonic voltage generated from the sensing electrodes of the 63rd fingerprint pixels 7 and 3 and the 64th fingerprint pixels 7 and 4 is the 61st and 62nd fingerprint pixels of the first group G1. (7,2), the 63rd fingerprint pixel (7,3) and is supplied to the fingerprint recognition unit 620 through sensing lines connected to the 64th fingerprint pixel (7,4), the fingerprint recognition unit 620 Using the sensing signals, fingerprint information on the fingerprint pixels is generated.

In this case, the fingerprint information is substantially the 61st fingerprint pixel (7,1), the 62nd fingerprint pixel (7,2), the 63rd fingerprint pixel (7,3) and the 64th fingerprint pixel ( 7,4), but the sensing signals are the 61st fingerprint pixels (7,1), the 62nd fingerprint pixels (7,2), and the 63rd fingerprint pixels (7,3) of the first group (G1). Since the fingerprint information was received through the sensing lines connected to the 64th fingerprint pixels 7 and 4, the fingerprint recognition unit 620 receives the fingerprint information from the 61st fingerprint pixels 7, 1 and 62 of the first group G1. It is recognized as corresponding to the fingerprint pixels 7 and 2, the 63rd fingerprint pixels 7, and 3, and the 64th fingerprint pixels 7, and 4.

Next, the driving signal supply unit 611 repeats the processes described in the 11th to 14th periods in the 15th to 20th periods to generate fingerprint information on the touched fingerprint pixels.

In this case, in FIG. 12, the 76th to 80th fingerprint pixels (8.6 to 8.10), the 86th to 90th fingerprint pixels (9.6 to 9.10), and the 96th to 100th fingerprint pixels (10.6 to 8.10) of the first group G1 The sensing signals generated in 10.10) are transmitted to the fingerprint recognition unit 620 through sensing lines connected to the fingerprint pixels. Therefore, the fingerprint recognition unit 620 recognizes that fingerprint information generated through the sensing lines is included in the first group G1.

In addition, in FIG. 12, the 71st to 75th fingerprint pixels (8.1 to 8.5), the 81st to 85th fingerprint pixels (9.1 to 9.5), and the 91st to 95th fingerprint pixels (10.1 to 10.5) of the second group G2 ), the sensing signals generated from the 71st to 75th fingerprint pixels (8.1 to 8.5) and the 81st to the first group G1 provided with sensing electrodes electrically connected to the sensing electrodes of the fingerprint pixel It is transmitted to the fingerprint recognition unit 620 through sensing lines connected to the 85th fingerprint pixels 9.1 to 9.5 and the 91st to 95th fingerprint pixels 10.1 to 10.5. Accordingly, the fingerprint recognition unit 620 recognizes that fingerprint information generated through the sensing lines is also included in the first group G1.

Next, the driving signal supply unit 611 repeats the processes described in the 11th to 14th periods in the 21st to 30th periods to generate fingerprint information on the touched fingerprint pixels.

In this case, in FIG. 12, the sixth to tenth fingerprint pixels (1.6 to 1.10) of the eleventh group (G11), the sixteenth to the twentieth fingerprint pixels (2.6 to 2.10), and the 26th to 30th fingerprint pixels (3.6 to 1.10) 3.10), sensing signals generated from the 37th to 40th fingerprint pixels (4.7 to 4.10) and the 48th to 50th fingerprint pixels (5.8 to 5.10) are sensing electrodes electrically connected to the sensing electrodes of the fingerprint pixels. The 6th to 10th fingerprint pixels (1.6 to 1.10), the 16th to 20th fingerprint pixels (2.6 to 2.10), the 26th to 30th fingerprint pixels (3.6 to 3.10) of the first group G1 It is transmitted to the fingerprint recognition unit 620 through sensing lines connected to the 37th to 40th fingerprint pixels (4.7 to 4.10) and the 48th to 50th fingerprint pixels (5.8 to 5.10). Accordingly, the fingerprint recognition unit 620 recognizes that fingerprint information generated through the sensing lines is also included in the first group G1.

In addition, in FIG. 12, the first to fifth fingerprint pixels (1.1 to 1.5), the eleventh to fifteenth fingerprint pixels (2.1 to 2.5), and the 21st to 25th fingerprint pixels (3.1 to 3.5) of the 12th group (G12). ), the sensing signals generated from the 31st to 34th fingerprint pixels (4.1 to 4.4) and the 41st to 43rd fingerprint pixels (5.1 to 5.3) are sensing electrodes electrically connected to the sensing electrodes of the fingerprint pixels. 1st to 5th fingerprint pixels (1.1 to 1.5), 11th to 15th fingerprint pixels (2.1 to 2.5), 21st to 25th fingerprint pixels (3.1 to 3.5), 31st of the provided first group G1 It is transmitted to the fingerprint recognition unit 620 through sensing lines connected to the 34th to 34th fingerprint pixels 4.1 to 4.4 and the 41st to 43rd fingerprint pixels 5.1 to 5.3. Accordingly, the fingerprint recognition unit 620 recognizes that fingerprint information generated through the sensing lines is also included in the first group G1.

Next, the driving signal supply unit 611 repeats the processes described in the 11th to 14th periods in the 31st to 40th periods to generate fingerprint information on the touched fingerprint pixels.

However, since the fingerprint XT of the user is not in contact with the fingerprint pixels corresponding to the sixteenth driving electrodes TX16 to the twentieth driving electrodes TX20 to which a driving signal is supplied in the 31st to 40th periods, the Fingerprint information related to the user's fingerprint XY is not generated by sensing signals received in the 31st to 40th periods.

That is, valid fingerprint information related to the user's fingerprint is generated by the sixth driving electrode TX6 to the fifteenth driving electrode TX5 in the 11th to 30th periods.

Next, the fingerprint recognition unit 620 combines the fingerprint information identified through the above processes to generate a single combined fingerprint.

In this case, as described above, in the 11th to 20th period, the 58th to 60th fingerprint pixels (6.8 to 6, 10) of the first group G1, the 67th to 70th fingerprint pixels (7, 7 to 7,10), 76th to 80th fingerprint pixels (8.6 to 8.10), 86th to 90th fingerprint pixels (9.6 to 9.10), and 96th to 100th fingerprint pixels (10.6 to 10.10). The information corresponds to the fingerprint pixels provided in the first group G1.

Also, in the 11th to 20th period, the 51st to 53th fingerprint pixels (6.1 to 6,3), the 61st to 64th fingerprint pixels (7,1 to 7,4) of the second group (G2), The fingerprint information generated for the 71st to 75th fingerprint pixels (8.1 to 8.5), the 81st to 85th fingerprint pixels (9.1 to 9.5), and the 91st to 95th fingerprint pixels (10.1 to 10.5) is the second group ( It corresponds to the fingerprint pixels provided in G2). However, as described above, the fingerprint recognition unit 620 may store the fingerprint information corresponding to the fingerprint pixels provided in the second group G2 and the 51 to 53 fingerprints of the first group G1. Pixels (6.1 to 6,3), 61 th to 64 th fingerprint pixels (7,1 to 7,4), 71 th to 75 th fingerprint pixels (8.1 to 8.5), 81 th to 85 th fingerprint pixels (9.1 to 9.5) ) And the 91st to 95th fingerprint pixels (10.1 to 10.5).

In addition, in the 21st to 30th period, the 6th to 10th fingerprint pixels (1.6 to 1, 10) of the eleventh group (G11), the 16th to 20th fingerprint pixels (2,6 to 2,10), The fingerprint information generated for the 26th to 30th fingerprint pixels (3.6 to 3.10), the 37th to 40th fingerprint pixels (4.7 to 4.10), and the 58th to 60th fingerprint pixels (5.8 to 5.10) is the 11th group ( It corresponds to the fingerprint pixels provided in G11). However, as described above, the fingerprint recognition unit 620 may store the fingerprint information corresponding to the fingerprint pixels provided in the eleventh group G1, and the sixth to tenth fingerprints of the first group G1. Pixels (1.6 to 1,10), 16th to 20th fingerprint pixels (2,6 to 2,10), 26th to 30th fingerprint pixels (3.6 to 3.10), 37th to 40th fingerprint pixels (4.7 to 4.10) ) And fingerprint information corresponding to the 58th to 60th fingerprint pixels 5.8 to 5.10.

In addition, in the 21st to 30th period, the first to fifth fingerprint pixels (1.1 to 1,5) of the twelfth group (G12), the eleventh to fifteenth fingerprint pixels (2,1 to 2,5), The fingerprint information generated for the 21st to 25th fingerprint pixels (3.1 to 3.5), the 31st to 34th fingerprint pixels (4.1 to 4.4), and the 41st to 43rd fingerprint pixels (5.1 to 5.3) is the 11th group ( It corresponds to the fingerprint pixels provided in G11). However, as described above, the fingerprint recognition unit 620 may store fingerprint information corresponding to the fingerprint pixels provided in the twelfth group G1, the first to fifth fingerprints of the first group G1. Pixels (1.1 to 1,5), 11th to 15th fingerprint pixels (2,1 to 2,5), 21st to 25th fingerprint pixels (3.1 to 3.5), 31st to 34th fingerprint pixels (4.1 to 4.4) ) And the fingerprint information corresponding to the 41st to 43rd fingerprint pixels 5.1 to 5.3.

Accordingly, as shown in FIG. 13, the fingerprint recognition unit 620 stores fingerprint information Y4 corresponding to the upper left of the twelfth group G12 on the upper left of the first group G1. Recognizes as corresponding fingerprint information, and recognizes the fingerprint information Y3 corresponding to the upper right of the eleventh group G11 as fingerprint information corresponding to the upper right of the first group G1, and the The fingerprint information Y2 corresponding to the lower left of the second group G2 is recognized as fingerprint information corresponding to the lower left of the first group G1, and at the lower right of the first group G1 Corresponding fingerprint information Y1 is recognized as fingerprint information corresponding to the lower right of the first group G1.

Accordingly, the fingerprint recognition unit 620 generates a combined fingerprint as shown in (a) of FIG. 13 for the first group G1.

Finally, the fingerprint recognition unit 620 performs a process of modifying the combined fingerprint.

That is, since the positions of the constituent parts of the combined fingerprint are different from the original positions, the combined fingerprint cannot be compared with the reference fingerprint stored in the storage unit 630.

In order to correct the combined fingerprint, the fingerprint recognition unit 620 uses the touch location information (TSI) received from the touch driver 700. As described above, the touch location information TSI includes information on X coordinates and Y coordinates of the touch location.

The fingerprint recognition unit 620 may know the location where the user's fingerprint XY is actually touched by using the touch location information TSI.

Accordingly, the fingerprint recognition unit 620 includes fingerprint information recognized as fingerprint information corresponding to the upper left of the first group G1, substantially corresponding to the upper left of the twelfth group G12. It can be seen that the information is Y4, and fingerprint information recognized as fingerprint information corresponding to the upper right of the first group G1 is substantially fingerprint information corresponding to the upper right of the eleventh group G11 It can be seen that it is a field Y3, and the fingerprint information recognized as fingerprint information corresponding to the lower left of the first group G1 is substantially fingerprint information corresponding to the lower left of the second group G2. It can be seen that it is (Y2), and the fingerprint information recognized as the fingerprint information Y1 corresponding to the lower right of the first group G1 is the fingerprint information corresponding to the lower right of the first group G1. Able to know.

To further explain, since there is no touch in the portion corresponding to the upper left of the first group G1, and there is touch only in the portion corresponding to the upper left of the twelfth group G12 among the groups, the fingerprint recognition unit ( It can be seen that the fingerprint information 620 corresponding to the upper left of the first group G1 is actually fingerprint information Y4 corresponding to the upper left of the twelfth group G12.

In addition, since there is no touch at a portion corresponding to the upper right of the first group G1 and touch is only at a portion corresponding to the upper right of the eleventh group G11 among the groups, the fingerprint recognition unit 620 It can be seen that the fingerprint information corresponding to the upper right of the first group G1 is substantially fingerprint information Y3 corresponding to the upper right of the eleventh group G11.

In addition, since there is no touch at a portion corresponding to the lower left of the first group G1, and touch is only at a portion corresponding to the lower left of the second group G2 among the groups, the fingerprint recognition unit 620 It can be seen that the fingerprint information corresponding to the lower left of the first group G1 is actually the fingerprint information Y2 corresponding to the lower left of the second group G2.

In addition, since there is a touch in a portion corresponding to the lower right of the first group G1, the fingerprint recognition unit 620 may substantially reduce the fingerprint information corresponding to the lower right of the first group G1. It can be seen that this is the fingerprint information Y1 corresponding to the lower right of the group G1.

Therefore, the fingerprint recognition unit 620 moves the position of the fingerprint information Y4 corresponding to the upper left of the combined fingerprint identified in FIG. 13A to a position corresponding to the upper left of the 12th group G12. And the position of the fingerprint information Y3 corresponding to the upper right of the combined fingerprint to a position corresponding to the upper right of the eleventh group G11, and the fingerprint information corresponding to the lower left of the combined fingerprint By correcting the position of (Y2) to the position corresponding to the lower left of the second group G2, a fingerprint as shown in (b) of FIG. 13 is generated. That is, the positions of each part of the fingerprint shown in FIG. 13B correspond to the positions of each part of the user's actual fingerprint.

The fingerprint recognition unit 620 compares the fingerprint as shown in (b) of FIG. 13, finally generated through the above processes, with the reference fingerprint stored in the storage unit 630, so that the fingerprint is It can be determined whether it matches the fingerprint.

A result of determining whether the fingerprint matches the reference fingerprint may be used for an application executed in the electronic device using the display device equipped with a large area fingerprint sensor according to the present invention.

For example, when an application running on a smartphone requires user authentication using a fingerprint, the smartphone may perform user authentication according to a determination result transmitted from the fingerprint recognition unit 620.

The sizes of the groups and the size and number of fingerprint pixels 510 provided in each of the groups may be variously set in consideration of the size of a user's finger or the size of a fingerprint.

For example, as shown in FIG. 12, the size of the user's fingerprint XY is an area formed by 10 fingerprint pixels provided in the horizontal direction and 10 fingerprint pixels provided in the vertical direction ( 10by10) (hereinafter, simply referred to as the normal region (Z1)), if not larger, the same position in each group among the fingerprint pixels provided in the four groups (G1, G2, G11, G12) shown in FIG. It does not occur when the fingerprint pixels provided in the device are simultaneously touched.

For example, since the area formed by the first fingerprint pixels 1 and 1 of the first group G1 and the second group G2 is larger than the area by 10by10, the first group of the first group G1 The case where the fingerprint pixels 1 and 1 and the first fingerprint pixels 1 and 1 of the second group G2 are simultaneously touched by the user's finger does not occur.

Similarly, since the area formed by the first fingerprint pixels 1 and 1 of the first group G1 and the 12th group G12 is larger than the area by 10by10, the first fingerprint pixel of the first group G1 The case where (1,1) and the first fingerprint pixels (1,1) of the twelfth group (G12) are simultaneously touched by the user's finger does not occur.

14 is an exemplary view showing a case in which the size of a user's fingerprint exceeds a preset range of a normal area in a display device equipped with a large area fingerprint sensor according to the present invention.

As described above, the sizes of the groups and the size and number of the fingerprint pixels 510 provided in each of the groups may be variously set in consideration of the size of a user's finger or the size of a fingerprint.

In particular, the size of the groups and the size and number of the fingerprint pixels 510 provided in each of the groups are determined when fingerprint pixels provided at the same location in each group among the fingerprint pixels provided in the groups are simultaneously touched. It is set not to occur.

However, when a finger of an unexpected size is touched in the manufacturing stage of the display device, as shown in FIG. 14, the area corresponding to the user's fingerprint XY' is a preset range, for example, as described above. It may deviate from the normal region Z1 corresponding to 10by10.

In this case, in a region outside the normal region Z1, fingerprint pixels provided at the same position in different groups may be simultaneously touched by the user's finger.

For example, in FIG. 14, the 57th fingerprint pixels 6,7 (h1) of the first group G1 and the 57th fingerprint pixels 6,7 (h2) of the 11th group G11 are different from each other. Although provided in the groups, the position of the 57th fingerprint pixels 6,7 (h1) in the first group G1 is the 57th fingerprint pixels 6,7 (h2) in the 11th group G11 ) Is the same as the location.

In a normal case, for example, as described with reference to FIG. 12, if the size of the user's fingerprint Y is smaller than the preset normal area Z1, the 57th fingerprint pixel 6 of the first group G1 ,7) Fingerprint information related to the user's fingerprint is generated only for (h1), and fingerprint information related to the user's fingerprint is not generated for the 57th fingerprint pixel (6,7) (h2) of the 11th group (G11). Does not.

However, when the user's fingerprint XY' is larger than the normal region Z1, as shown in FIG. 14, the 57th fingerprint pixels 6, 7 and h1 of the first group G1 are Fingerprint information related to the user's fingerprint (XY') is generated, and fingerprint information related to the user's fingerprint (XY') is also generated for the 57th fingerprint pixels (6,7) (h2) of the 11th group (G11). .

In this case, it corresponds to the receiving electrode corresponding to the 57th fingerprint pixel (6,7) (h1) of the first group (G1) and the 57th fingerprint pixel (6,7) (h2) of the 11th group (G11) The receiving electrodes are connected to each other. Therefore, when a driving signal is supplied to the sixth touch electrode TX6 corresponding to the 57th fingerprint pixels 6, 7 and h1 of the first group G1, the sensing signal is transmitted to the fingerprint recognition unit 620. When a driving signal is supplied to the sixteenth touch electrode TX16 corresponding to the 67th fingerprint pixels 6,7 and h2 of the eleventh group G11, a sensing signal is transmitted to the fingerprint recognition unit 620 Is delivered to.

Accordingly, fingerprint information corresponding to the 57th fingerprint pixels 6, 7 and h1 of the first group G1 has a value different from a normal value.

In this case, fingerprint pixels having abnormal values, such as the 57th fingerprint pixels 6 and 7 of the first group G1 and the 57th fingerprint pixels 6 and 7 of the 11th group G11, are in the normal region ( It is provided outside of Z1).

Therefore, when the combined fingerprint for the normal region Z1 corresponding to 10by10 is generated as shown in FIG. 13A, the outer edge of the combined fingerprint has a different shape from the user's fingerprint, and thus, The fingerprint recognition unit 620 may exclude fingerprint information provided outside the normal area Z1.

To further explain, the fingerprint recognition unit 620 may know locations of fingerprint pixels corresponding to fingerprint information having an abnormal value. That is, in the above example, a fingerprint generated by the 57th fingerprint pixels 6,7 (h1) of the first group G1 and the 57th fingerprint pixels 6,7 (h2) of the 11th group G11 The information has an abnormal value. Accordingly, the fingerprint recognition unit 620 includes the 57th fingerprint pixels 6,7 (h1) of the first group G1 and the 57th fingerprint pixels 6,7 (h2) of the 11th group G11 , The 57th fingerprint pixels 6 and 7 of the second group and the 57th fingerprint pixels 6 and 7 of the 12th group G12 may be recognized as abnormal fingerprint pixels.

Since the 57th fingerprint pixels 6, 7 (h1) of the first group G1 are included in the normal region Z1, as shown in FIGS. 12 and 14, the first group G1 The fingerprint information corresponding to the 57th fingerprint pixel 6,7 (h1) should be included in the fingerprint as shown in FIG. 13B as well as the combined fingerprint.

However, the 57th fingerprint pixel 6,7(h1) of the first group G1, the 57th fingerprint pixel 6,7(h2) of the 11th group G11, and the 57th fingerprint pixel of the second group Since the 57th fingerprint pixels 6 and 7 in the (6, 7) and twelfth groups (G12) are determined to be abnormal fingerprint pixels, the fingerprint recognition unit 620 operates in the first group ( The 57th fingerprint pixel (6,7) (h1) of G1), the 57th fingerprint pixel (6,7) (h2) of the 11th group (G11), the 57th fingerprint pixel (6,7) of the second group, and An area excluding the 57th fingerprint pixels 6 and 7 of the 12th group G12 is set as the correction area Z2.

That is, the fingerprint recognition unit 620 extracts only the region corresponding to the correction region Z2, for example, 8by8, among the combined fingerprint as shown in FIG. 13A, and finally generates a fingerprint. .

Accordingly, the size of the fingerprint generated in the above example is smaller than the size of the fingerprint generated in FIG. 13B.

For example, since the fingerprint generated in (b) of FIG. 13 has a size corresponding to the normal region Z1, it has a size of 10by10. However, since the fingerprint finally generated with reference to FIG. 14 has a size corresponding to the correction area Z2, it has a size of 8by8.

The size of the correction area Z2 may be formed in various ways in consideration of the size of the normal area Z2, the size of the user fingerprint YY outside the normal area Z2, and the positions of fingerprint pixels having abnormal values. I can.

15 is an exemplary view showing groups constituting a fingerprint sensor applied to a display device equipped with a large area fingerprint sensor according to the present invention.

As described above, the number of groups and the number of fingerprint pixels 510 provided in each of the groups may be variously changed according to the size and resolution of the fingerprint sensor 500.

In particular, the minimum number of the groups may be two. When the number of groups is four, the fingerprint sensor 500 may be divided into four areas, as shown in FIG. 15. The size of the fingerprint sensor 500 shown in FIG. 9 and the size of the fingerprint sensor 500 shown in FIG. 15 are the same, and the sizes of the fingerprint pixels 510 constituting the fingerprint sensor 500 shown in FIG. 9 And, when the size of the fingerprint pixels 510 constituting the fingerprint sensor 500 shown in FIG. 15 are the same, the number of sensing lines SL provided in the fingerprint sensor 500 shown in FIG. 9 is It may be smaller than the number of sensing lines SL provided in the fingerprint sensor 500 illustrated in FIG. 15.

For example, as described with reference to FIGS. 9 and 10, the sensing lines SL may be connected only to the fingerprint pixels 510 provided in the first group G1 shown in FIGS. 9 and 10. In addition, the number of the sensing lines SL may be the same as the number of fingerprint pixels 510 provided along the sensing gate line among the fingerprint pixels 510 provided in the first group G1.

Accordingly, the number of fingerprint pixels 510 provided along the sensing gate line in the first group G1 illustrated in FIGS. 9 and 10 is the sensing gate line in the first group G1 illustrated in FIG. 15. It is smaller than the number of fingerprint pixels 510 provided along the line.

As the number of groups increases, the number of sensing lines SL may decrease, and accordingly, the size of the integrated circuit including the fingerprint recognition unit 620 may decrease, and thus, the size of the bezel increases. Can be reduced.

However, as the number of groups decreases, the size of the normal region Z1 decreases, and thus, correction as described with reference to FIG. 14 is required, which may reduce the fingerprint recognition capability.

Accordingly, the number and size of groups may be variously set in consideration of the size of the user's fingerprint and the size of the fingerprint sensor.

Those skilled in the art to which the present invention pertains will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: display panel 200: gate driver
300: data driver 400: control unit
500: fingerprint sensor 600: fingerprint sensor driver
700: touch driver 800: touch panel

Claims (10)

A display panel on which an image is displayed;
A touch panel for sensing a touch;
A fingerprint sensor including fingerprint pixels that perform a function as a basic unit for recognizing a fingerprint of a finger;
A fingerprint sensor driver for driving the fingerprint sensor; And
Including a touch driver for driving the touch panel,
Sensing lines extending along a first direction in the fingerprint sensor; And
Sensing gate lines extending along a second direction different from the first direction are provided,
The fingerprint pixels are divided into at least two groups, and reception electrodes corresponding to the fingerprint pixels provided at the same position in each group are electrically connected to a large area fingerprint sensor. The method of claim 1,
The fingerprint sensor driver,
A display device including a large-area fingerprint sensor that supplies driving signals to the sensing gate lines. The method of claim 1,
The fingerprint sensor,
A plurality of receiving electrodes;
Sensing lines extending along a first direction and connected to at least one of the fingerprint pixels provided along the first direction;
A driving electrode unit including at least one driving electrode;
Sensing gate lines extending along a second direction different from the first direction;
Fixed voltage lines extending along the first direction;
Fingerprint common voltage lines extending along the first direction; And
It includes first to third transistors provided in the fingerprint pixel,
The number of sensing lines is,
A display device provided with a large area fingerprint sensor that is smaller than the number of fingerprint pixels provided along the second direction. The method of claim 3,
The number of sensing lines is,
A display device including a large-area fingerprint sensor equal to the number of fingerprint pixels provided along the sensing gate lines in any one of the groups. The method of claim 4,
The sensing lines are provided in a large-area fingerprint sensor provided in groups adjacent to each other in the first direction. The method of claim 4,
The sensing lines are provided with a large-area fingerprint sensor provided in one of the groups adjacent to each other along the second direction. The method of claim 3,
The fingerprint sensor includes a large-area fingerprint sensor provided with at least one dummy sensing line not connected to the fingerprint sensor driver. The method of claim 3,
The sensing line is a display device having a large-area fingerprint sensor electrically connected to the fingerprint pixels provided in the one group from one of the groups provided along the sensing line. The method of claim 1,
Of the receiving electrodes corresponding to the fingerprint pixels provided at the same position in each group, the receiving electrodes disposed parallel to the second direction are electrically connected through a horizontal connection line disposed parallel to the second direction,
Horizontal connection lines connecting fingerprint pixels provided at the same position in each group among the horizontal electrodes are provided with a large-area fingerprint sensor electrically connected through at least one vertical connection line arranged in parallel along the first direction. Display device. The method of claim 3,
A gate of the first transistor is connected to the receiving electrode, a first terminal is connected to the fixed voltage line, a second terminal is connected to a second terminal of the second transistor,
A gate of the second transistor is connected to the sensing gate line, a first terminal is connected to the sensing line, a second terminal is connected to a second terminal of the first transistor,
A display device including a fingerprint sensor, wherein a gate of the third transistor is connected to a reset line, a first terminal is connected to a gate of the first transistor, and a second terminal is connected to the fingerprint common voltage line.

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