KR20180070463A - Display device, display panel, finger print sensing method, and circuit for sensing finger print - Google Patents

Abstract

The present invention relates to a display device, a display panel, a fingerprint sensing method and a circuit therefor. More particularly, the present invention can sense a fingerprint without an additional fingerprint sensor on the outside of the display panel by sensing fingerprint information by receiving a signal from a data line electrically connected to a pixel electrode through a switching transistor after a driving voltage is applied to a pixel electrode arranged in a pixel region.

Description

DISPLAY DEVICE, DISPLAY PANEL, FINGERPRINT DETECTION METHOD, AND CIRCUIT FOR THE SAME Technical Field [0001] The present invention relates to a display device,

The present invention relates to a display device, a display panel, a fingerprint sensing method and a circuit therefor.

2. Description of the Related Art [0002] With the development of an information society, demands for a display device for displaying an image have increased in various forms. Recently, a liquid crystal display device (LCD), a plasma display panel (PDP) Various display devices such as an organic light emitting display device (OLED) and the like are being utilized.

Among such display devices, there is a display device capable of providing a touch-based input method that allows a user to easily input information or commands intuitively and conveniently by moving away from a conventional input method such as a button, a keyboard, and a mouse.

In order for the display device to provide a touch-based input method, it is necessary to grasp the presence or absence of a user's touch and accurately detect the touch coordinates (touch position).

On the other hand, recently, the display device utilizes fingerprints, which are biometric information, as user authentication means for on-line banking, product purchase, application purchase and download.

Such a display device detects a user's fingerprint for various application functions, and compares the detected fingerprint with a previously stored fingerprint to provide user authentication.

As described above, in order to accurately perform various application functions, it is most important that the display device accurately detect fingerprint information.

The conventional display device has a fingerprint sensor separately from the display panel, and performs fingerprint detection using the fingerprint sensor.

As described above, since the fingerprint sensor needs to be provided separately, the manufacturing process of the display device can be complicated.

In addition, since the fingerprint sensor is provided outside the display panel, the external area of the display panel is inevitably enlarged. Therefore, the design constraint of the external appearance design of the display device must be followed.

In view of the foregoing, it is an object of embodiments of the present invention to provide a display device, a display panel, a fingerprint sensing method, and a circuit therefor that are capable of detecting fingerprints without separately providing a fingerprint sensor outside the display panel.

It is another object of embodiments of the present invention to provide a display device, a display panel, a fingerprint sensing method, and a circuit therefor, in which a portion of a display panel is allocated as a fingerprint sensing area to perform fingerprint sensing.

It is another object of embodiments of the present invention to provide a display device, a display panel, a fingerprint sensing method, and a circuit therefor that can perform fingerprint sensing by utilizing a pixel structure as a fingerprint sensing structure.

It is still another object of embodiments of the present invention to provide a display device, a display panel, a fingerprint sensing method, and a circuit therefor that enable fingerprint recognition in an application program screen.

It is another object of embodiments of the present invention to provide a display device, a display panel, a fingerprint sensing method, and a circuit therefor that enable optical fingerprint sensing as well as capacitance-based fingerprint sensing.

In one aspect, the embodiments of the present invention are characterized in that K (K is a natural number of 2 or more) data lines are arranged, H (H is a natural number of 2 or more) gate lines are arranged, and K data lines and H gate lines A gate driving circuit for driving the H gate lines, a data driving circuit for driving the K data lines, and a data driving circuit for driving the data lines, A driving voltage supply circuit for supplying a driving voltage to Q data lines (Q is a natural number of 1 or more) of K data lines; And a fingerprint sensing circuit for sensing fingerprint information in a first region including a pixel region defined by Q gate lines and Q data lines, Can.

In another aspect, the embodiments of the present invention can provide a display panel including K (K is a natural number of 2 or more) data lines and H (H is a natural number of 2 or more) gate lines.

In this display panel, a first region including a pixel region defined by Q (Q is a natural number of 1 or more) data lines among N (N is a natural number of 1 or more) gate lines and K data lines among H gate lines May be a fingerprint sensing area for sensing fingerprint information.

On the display panel, gate signals of turn-on level voltages are sequentially supplied to the N gate lines during the charging period in the fingerprint sensing mode section, and a driving voltage, which is a voltage different from the video data voltage, is supplied to the Q data lines have.

In the display panel, during the sensing period in the fingerprint sensing mode section, the gate signals of the turn-on level voltage are sequentially supplied to the N gate lines, and Q data lines can be electrically connected to the fingerprint sensing circuit.

In another aspect, the embodiments of the present invention are characterized in that K (K is a natural number of 2 or more) data lines are arranged, H (H is a natural number of 2 or more) gate lines are arranged, and K data lines and H gates And a display panel in which a plurality of pixel regions defined by lines are arranged and pixel electrodes are arranged for each pixel region.

In this driving method, in a region including a pixel region defined by Q (Q is a natural number of 1 or more) data lines among N (N is a natural number of 1 or more) gate lines and K data lines among H gate lines, And a fingerprint sensing mode starting step of recognizing occurrence of a start event for a fingerprint sensing mode for sensing information.

Further, the driving method may provide a charging step of sequentially supplying the gate signal of the turn-on level voltage to the N gate lines and supplying the driving voltage, which is a voltage different from the video data voltage, to the Q data lines.

The driving method includes a sensing step of sequentially supplying a gate signal of a turn-on level voltage to N gate lines, not supplying a driving voltage to Q data lines, and detecting signals of Q data lines can do.

According to another aspect of the present invention, there is provided a liquid crystal display device including a first circuit for supplying a driving voltage to Q (Q is a natural number of 1 or more) data lines among K data lines (K is a natural number of 2 or more) And a second circuit for detecting a signal of the fingerprint sensor.

According to another aspect of the present invention, there is provided a display device comprising: a display panel in which a data line is arranged, a gate line is arranged, pixel regions defined by a data line and a gate line are arranged, And a fingerprint sensing circuit that receives a signal from a data line electrically connected to the pixel electrode through the switching transistor after the driving voltage is applied to the pixel electrode and detects fingerprint information.

As described above, according to the embodiments of the present invention described above, it is possible to provide a display device, a display panel, a fingerprint sensing method, and a circuit therefor, which are capable of detecting fingerprints without separately providing a fingerprint sensor outside the display panel.

According to embodiments of the present invention, it is possible to provide a display device, a display panel, a fingerprint sensing method, and a circuit therefor, in which a partial area of a display panel is allocated as a fingerprint sensing area to perform fingerprint sensing.

According to embodiments of the present invention, a display device, a display panel, a fingerprint sensing method, and a circuit therefor that can perform fingerprint sensing using a pixel structure as a fingerprint sensing structure can be provided.

In addition, according to embodiments of the present invention, a display device, a display panel, a fingerprint sensing method and a circuit for enabling fingerprint recognition in an application program screen can be provided.

In addition, according to embodiments of the present invention, it is possible to provide a display device, a display panel, a fingerprint sensing method, and a circuit therefor that enable optical fingerprint sensing as well as capacitance-based fingerprint sensing.

1 is a schematic configuration diagram of a display device according to embodiments of the present invention.
2 is a diagram illustrating two touch sensing of a display device according to embodiments of the present invention.
3A is a diagram illustrating a fingerprint sensing structure of a display device according to embodiments of the present invention.
3B is an equivalent circuit of the fingerprint sensing structure of the display device according to the embodiments of the present invention.
4 is a diagram illustrating circuits for fingerprint sensing of a display device according to embodiments of the present invention.
5A is a basic configuration diagram of a fingerprint sensing circuit of a display device according to embodiments of the present invention. 5B is a timing diagram showing a basic fingerprint sensing driving method of the display device according to the embodiments of the present invention.
6 to 8 are operation mode timing diagrams of a display device according to embodiments of the present invention.
9 is a diagram showing regions in a display panel according to embodiments of the present invention.
FIGS. 10 to 12 are diagrams showing examples of the configuration of a data driving circuit and a fingerprint sensing circuit of a display device according to embodiments of the present invention.
13 is a timing control switch circuit for first fingerprint sensing driving of a display device according to embodiments of the present invention.
14 is an operation truth table of a timing control switch circuit for first fingerprint sensing driving of the display device according to the embodiments of the present invention.
15A and 15B are drive timing diagrams for the first fingerprint sensing drive of the display device according to the embodiments of the present invention.
16 is a diagram showing a timing control switch circuit for the second fingerprint sensing drive of the display device according to the embodiments of the present invention.
17 is an operational truth table of the timing control switch circuit for the second fingerprint sensing drive of the display device according to the embodiments of the present invention.
18A and 18B are drive timing diagrams for the second fingerprint sensing drive of the display device according to the embodiments of the present invention.
FIG. 19 is a view showing an optical fingerprint sensing structure of a display device according to embodiments of the present invention.
20 is an equivalent circuit of the optical fingerprint sensing structure of the display device according to the embodiments of the present invention.
21 is a view showing a light irradiation device of a display device according to embodiments of the present invention.
22A and 22B are drive timing diagrams for the third fingerprint sensing drive of the display device according to the embodiments of the present invention.
23 is a schematic flowchart of a method of driving a display device according to embodiments of the present invention.
FIG. 24 is a circuit diagram for fingerprint sensing according to embodiments of the present invention.
25 is a diagram illustrating a touch sensing configuration of a display device according to embodiments of the present invention.
26 and 27 are views showing positions of a fingerprint sensing area in a display panel according to embodiments of the present invention.
28 is a flowchart of a method of driving a display device according to embodiments of the present invention.
29 is a diagram illustrating a fingerprint detection scenario of a display device according to embodiments of the present invention.
FIGS. 30 and 31 are diagrams showing driving timing diagrams according to the fingerprint sensing scenario of the display device according to the embodiments of the present invention.
32 is an equivalent circuit of the fingerprint sensor structure when the display device according to the embodiments of the present invention is an organic light emitting display device.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

FIG. 1 is a schematic structural view of a display device 100 according to embodiments of the present invention, and FIG. 2 is a diagram illustrating two touch sensing of a display device according to embodiments of the present invention.

Referring to FIG. 1, the display device 100 according to the embodiments of the present invention can provide a video display function and a touch input function.

The display device 100 according to the embodiments of the present invention includes a display panel 110, a data driving circuit 120, a gate driving circuit 130, a controller 140, and the like in order to provide a video display function can do.

In the display panel 110, K data lines DL and H gate lines GL are arranged. K is a natural number of 2 or more, and H is a natural number of 2 or more.

In addition, the display panel 110 is arranged with a plurality of pixels defined by K data lines DL and H gate lines GL.

In each pixel region, a pixel electrode to which an image data voltage corresponding to a video signal of the pixel is applied, and a switching transistor to control application of the image data voltage to the pixel electrode may be disposed.

The data driving circuit 120 is a circuit for driving K data lines DL for video display and can output image data data voltages corresponding to the video signals through K data lines DL.

The gate driving circuit 130 sequentially drives H gate lines GL for image display and sequentially supplies gate signals (scan signals) to H gate lines GL for video display have.

The controller 140 controls the data driving circuit 120 and the gate driving circuit 130 so that the data driving circuit 120 and the gate driving circuit 130 receive various control signals Control signals and the like) to the data driving circuit 120 and the gate driving circuit 130.

The controller 140 starts scanning in accordance with the timing implemented in each frame, switches the input image data input from the outside according to the data signal format used by the data driving circuit 120, and outputs the converted image data And controls the data driving at a suitable time according to the scan.

The controller 140 may be a timing controller used in a conventional display technology or a control device including a timing controller to perform other control functions.

1, the data driving circuit 120 is disposed on only one side (e.g., the upper side or the lower side) of the display panel 110, Lower side).

The data driving circuit 120 may be implemented by including at least one source driver integrated circuit (SDIC).

Each source driver integrated circuit (SDIC) is connected to a bonding pad of the display panel 110 by a tape automated bonding (TAB) method or a chip on glass (COG) method , And may be directly disposed on the display panel 110, or may be integrated and disposed on the display panel 110 as occasion demands. In addition, each source driver integrated circuit (SDIC) may be implemented by a chip on film (COF) method, which is mounted on a film connected to the display panel 110.

Each source driver integrated circuit (SDIC) may include a shift register, a latch circuit, a digital to analog converter (DAC), an output buffer, and the like.

Each source driver integrated circuit (SDIC) may further include an analog to digital converter (ADC), as the case may be.

1, the gate driving circuit 130 is disposed on only one side (e.g., left side or right side) of the display panel 110, And the right side).

The gate driving circuit 130 may be implemented by including at least one gate driver integrated circuit (GDIC).

Each gate driver integrated circuit GDIC is connected to a bonding pad of the display panel 110 by a tape automated bonding (TAB) method or a chip on glass (COG) And may be directly disposed on the display panel 110 or integrated on the display panel 110 as the case may be. In addition, each gate driver IC (GDIC) may be implemented in a chip-on-film (COF) manner, which is mounted on a film connected to the display panel 110.

Each gate driver IC (GDIC) may include a shift register, a level shifter, and the like.

Each pixel disposed in the display panel 110 may include a circuit element such as a transistor.

The types and the number of the circuit elements constituting each pixel can be variously determined according to the providing function, the design method, and the like.

Meanwhile, the display device 100 according to the embodiments of the present invention may provide a touch sensing function for sensing a touch of a user to provide a touch input function.

Here, the touch object, which is a touch means of the user, may be a finger, a pen, or the like, for example. Hereinafter, for convenience of explanation, it is assumed that the touch object is a finger.

2, in the embodiments of the present invention, the touch sensing function includes a touch position sensing function for sensing whether a user touches and / or touches a touch (i.e., touch coordinates P (X, Y)), And a fingerprint detection function (fingerprint recognition function) for detecting the fingerprint.

In the display device 100 according to the embodiments of the present invention, the touch position sensor for sensing the touch position may be disposed in the display panel 110. [

That is, in the display device 100 according to the embodiments of the present invention, the touch screen panel may be a type (e.g., an in-cell type, an on-cell type, etc.) embedded in the display panel 110.

The touch position sensor can be disposed in the entire area of the display panel 110. [

Such a touch position sensor may be, for example, a common electrode (CE in FIG. 3A) disposed in the display panel 110 and blocked in several ways.

In the display device 100 according to the embodiments of the present invention, a fingerprint sensor for fingerprint detection may also be embedded in the display panel 110. [

The fingerprint detection sensor may be disposed in the fingerprint detection area FPSA corresponding to the entire area or a part of the area of the display panel 110.

The fingerprint detection area FPSA may be an area where the image is not displayed or an area where the image is displayed.

Referring to FIG. 1, a display device 100 according to an exemplary embodiment of the present invention includes a touch sensing circuit (not shown) for sensing a touch signal, And a fingerprint detection circuit for detecting the electrical signal to obtain fingerprint information by driving the fingerprint detection sensor.

The touch sensing circuit and the fingerprint sensing circuit may be separately configured circuits.

Alternatively, the touch sensing circuit and the fingerprint sensing circuit may be the same circuit.

Alternatively, the fingerprint sensing circuit may be part of the touch sensing circuit.

Alternatively, the touch sensing circuit may be part of a fingerprint sensing circuit.

The touch position information may include at least one of information about whether or not the user touches the screen and information about the touch position (touch coordinates, P (X, Y)).

The fingerprint information may be information including a shape of a valley which is a portion of a ridge protruding from the fingerprint of the finger, and a pattern between the finger and the finger.

Such fingerprint information may be biometric information unique to each user.

Meanwhile, the user's touch (including at least one of a touch for detecting the touch position and a touch for detecting fingerprint) may mean that the user has touched the screen (the touch screen, the surface corresponding to the fingerprint sensing area) It may mean that the user does not touch the screen but is close to a certain distance or less.

As described above, the display device 100 can perform various application functions through touch position sensing, and can perform various application functions such as user authentication through fingerprint detection.

FIG. 3A is a diagram illustrating a fingerprint sensing structure of the display device 100 according to the embodiments of the present invention, and FIG. 3B is an equivalent circuit diagram of the fingerprint sensing structure of the display device 100 according to the embodiments of the present invention .

Referring to FIGS. 3A and 3B, a display panel 110 according to embodiments of the present invention has a fingerprint sensing structure based on a pixel structure.

In the display panel 100 of the display device 100 according to the embodiments of the present invention, K data lines DL and H gate lines GL are arranged, and K data lines DL and H gates A number of pixels defined by the line GL may be arranged.

A pixel electrode PXL to which a video data voltage (that is, a pixel voltage), which is a video signal corresponding to the pixel, is applied to an area corresponding to each pixel, that is, each pixel area PA.

On / off is controlled by the gate signal applied to the gate node GL through the corresponding gate line GL, and electric charges are applied between the corresponding data line DL and the corresponding pixel electrode PXL A switching transistor SWT connected to the scan electrode Y may be disposed.

The switching transistor SWT transfers the image data voltage from the data line DL to the pixel electrode PXL in a turn-on state.

The switching transistor SWT includes a first node E1 electrically connected to the pixel electrode PXL, a second node E2 electrically connected to the data line DL, and a second node E2 electrically connected to the gate line GL A third node E3 and a semiconductor layer having both ends thereof contacted with the first node E1 and the second node E2.

The switching transistor SWT can be controlled on and off according to the gate signal (also referred to as a scan signal) of the third node E3 from the gate line GL.

In the switching transistor SWT, the first node E1 may be a drain node (drain node) or a source node (source node). The second node E2 may be a source node or a drain node. The third node E3 may be a gate node.

Hereinafter, for convenience of explanation, it may be described that the first node E1 is a drain node, the second node E2 is a source node, and the third node E3 is a gate node.

The switching transistor SWT may be an n-type transistor or a p-type transistor.

As described above, in the embodiments of the present invention, the fingerprint sensing structure may include a pixel electrode (PXL), a switching transistor (SWT), or the like disposed in each pixel region PA.

In the fingerprint sensing structure in the embodiments of the present invention, the pixel electrode PXL corresponds to the fingerprint sensing sensor.

Further, in the embodiments of the present invention, the fingerprint sensing structure may also include a data line DL and a gate line GL.

On the other hand, the common electrode CE to which the common voltage VCOM is applied may be disposed on the display panel 110. [

The common electrode CE and each pixel electrode PXL may form a storage capacitor Cst that serves to maintain a voltage required for image display for one frame time.

The capacitance of the storage capacitor Cst in each pixel is determined by the common voltage VCOM applied to the common electrode PXL and the pixel voltage applied to each pixel electrode PXL Can be determined.

Meanwhile, when the user touches the display panel 110, a finger capacitor Cf may be formed between the finger or the like and the pixel electrode PXL.

The capacitance of the finger capacitor Cf may vary depending on the position of the corresponding pixel with respect to the touch.

Therefore, the display device 100 may detect the presence or absence of a touch and / or the touch position by finding the difference in capacitance of the finger capacitor Cf.

The capacitance of the finger capacitor Cf may also be varied depending on a ridge which is a portion protruding from the fingerprint of the finger and a valley which is a depression portion between the finger and the finger.

Accordingly, the display apparatus 100 can detect the fingerprint information including the pattern and shape of the ridge and valley of the fingerprint by finding the difference in capacitance of the finger capacitor Cf.

Since the above-described fingerprint sensing structure is based on the pixel structure, it is not necessary to form a separate fingerprint sensing sensor on the display panel 110 for sensing the fingerprint.

Therefore, it is possible to simplify the fabrication of the display panel 110 having the fingerprint sensing structure, and to thin the thickness of the display panel 110 having the fingerprint sensing structure.

In addition, if the image can be displayed in the fingerprint sensing area FPSA, it is not necessary to design the fingerprint sensing structure outside the display panel 110, so that the display device 100 can be easily manufactured.

Meanwhile, as the fingerprint sensing structure, it may further include an optical sensor PS which will be described later with reference to FIG. In this case, the optical sensor PS may be connected to the first node E1 and the second node E2 of the switching transistor SWT.

4 is a diagram showing circuits for fingerprint sensing of the display device 100 according to the embodiments of the present invention, and FIG. 5A is a diagram illustrating a basic configuration of the fingerprint sensing circuit of the display device 100 according to the embodiments of the present invention And FIG. 5B is a timing diagram showing a basic fingerprint sensing driving method of the display device 100 according to the embodiments of the present invention.

Referring to FIG. 4, a fingerprint sensing area FPSA may exist within a whole screen area where an image can be displayed on the display panel 110.

The fingerprint sensing area FPAS is an area for sensing fingerprint information and may include one or more pixel areas PA defined by N gate lines GL_F1 to GL_FN and Q data lines DL_F1 to DL_FQ have. N is a natural number of 1 or more, and Q is a natural number of 1 or more.

The N gate lines GL_F1 to GL_FN are gate lines for display driving and gate lines used for fingerprint sensing for fingerprint sensing. The Q data lines DL_P + 1 to DL_P + Q are data lines used for display driving and data lines used for fingerprint sensing driving. 4, a display device 100 according to an embodiment of the present invention includes a driving voltage supply circuit DRVC 410, a fingerprint sensing circuit (FPSC) 420, and a gate driving circuit 130 ), And the like.

The driving voltage supply circuit 410 may be electrically connected to the data line DL corresponding to one or more pixel areas PA arranged in the fingerprint sensing area FPSA.

Here, a switch circuit may be provided between the driving voltage supply circuit 410 and one or more data lines DL to control whether the driving voltage supply circuit 410 is connected to one or more data lines DL.

The driving voltage supply circuit 410 supplies the driving voltage VDRV to the pixel electrode PXL in one or more pixel areas PA disposed in the fingerprint sensing area FPSA, And supplies the driving voltage VDRV to the data line DL.

When the gate signal GATE of the turn-on level voltage supplied to the gate line GL by the gate driving circuit 130 is applied to the gate node of the switching transistor SWT, the switching transistor SWT is turned on , And the data line DL and the pixel electrode PXL are electrically connected.

The driving voltage VDRV supplied to the data line DL by the driving voltage supply circuit 410 is applied to the pixel electrode PXL through the switching transistor SWT in the turn-on state.

The fingerprint sensing circuit 420 may be electrically connected to the data line DL corresponding to one or more pixel areas PA disposed in the fingerprint sensing area FPSA.

Between the fingerprint sensing circuit 420 and one or more data lines DL, there may be a switch circuit for controlling whether the fingerprint sensing circuit 420 is connected to one or more data lines DL.

The fingerprint sensing circuit 420 can detect (detect) a signal of the data line DL when the fingerprint sensing circuit 420 is electrically connected to the data line DL.

 Here, the signal detected by the fingerprint sensing circuit 420 may be a signal corresponding to the charge or capacitance stored in the finger capacitor Cf.

Here, the finger capacitor Cf is a capacitor formed between the pixel electrode PXL and the finger, or between the pixel electrode PXL and the capacitor or pixel electrode PXL formed between the ridge of the fingerprint fingerprint and the valley of the fingerprint fingerprint As shown in FIG.

The magnitude of the signal detected by the fingerprint sensing circuit 420 may vary depending on how close the pixel electrode PXL is to the finger, that is, whether or not it is touched.

The size of the signal detected by the fingerprint sensing circuit 420 may vary depending on how close the pixel electrode PXL is to the fingerprint (ridge or valley), that is, the ridge or valley of the fingerprint.

The fingerprint sensing circuit 420 includes an amplifier AMP connected to Q data lines DL_F1 through DL_FQ, an integrator INTG for receiving and integrating an output signal of the amplifier AMP and outputting an integration value, A sample-and-hold circuit (SHA) for storing an integral value, and an analog-to-digital converter (ADC) for converting a value stored in the simple-and-hold circuit (SHA) into a digital value and outputting the digital value.

In the amplifier AMP, the non-inverting input terminal (+) may receive the reference voltage VREF and supply the reference voltage VREF to the corresponding data line DL. In the amplifier AMP, the signal at the corresponding data line DL is input to the inverting input terminal (-). In the amplifier AMP, a capacitor CFB and a reset switch RESET may be connected in parallel between the inverting input terminal (-) and the output terminal.

The fingerprint sensing circuit 420 is provided with a connection between the Q data lines DL_F1 to DL_FQ and the amplifier AMP for the reference voltage supply process and sensing process (signal detection process) for the Q data lines DL_F1 to DL_FQ, (SHE) and an analog-to-digital converter (ADC), as the case may be.

Referring to FIG. 5B, a basic fingerprint sensing driving method may be performed during a fingerprint sensing mode period including a charging interval S10 and a sensing interval S20.

The charging period S10 is a period in which the driving voltage VDRV is applied to the pixel electrode PXL located in the pixel area PA included in the fingerprint sensing area FPSA and the pixel electrode PXL and the finger Is charged in the finger capacitor (Cf) between the source and the drain.

The charging interval S10 will be described in more detail as follows.

The gate driving circuit 130 supplies the gate signal GATE of the turn-on level voltage to the gate line GL. Here, the gate line GL is a gate line corresponding to the pixel region PA included in the fingerprint sensing area FPSA.

Thus, the switching transistor SWT located in the pixel area PA included in the fingerprint sensing area FPSA is turned on.

The driving voltage supply circuit 410 supplies the driving voltage VDRV to the data line DL. Here, the data line DL is a data line corresponding to the pixel area PA included in the fingerprint sensing area FPSA.

Accordingly, the pixel electrode PXL located in the pixel region PA included in the fingerprint sensing region FPSA applies the driving voltage VDRV from the data line DL through the turned-on switching transistor SWT Receive.

A finger capacitor Cf is formed between the pixel electrode PXL and the finger (valley or ridge of the fingerprint) to which the driving voltage VDRV is applied and charges are charged in the finger capacitor Cf.

After the charging period S10 ends and a predetermined period of time elapses, the sensing period S20 proceeds.

The sensing period S20 is a period in which the fingerprint sensing circuit 420 reads a signal capable of indicating the charge or capacitance charged in the finger capacitor Cf between the pixel electrode PXL and the finger (valley or ridge of the fingerprint) Period.

In this sensing period S20, the gate driving circuit 130 supplies the gate signal GATE of the turn-on level voltage to the gate line GL. Here, the gate line GL is a gate line corresponding to the pixel region PA included in the fingerprint sensing area FPSA.

Thus, the switching transistor SWT located in the pixel area PA included in the fingerprint sensing area FPSA is turned on, and the pixel electrode PXL and the data line DL are electrically connected.

In the sensing period S20, a switch circuit (which may be a TCSW in Figs. 13, 16, and 24) existing between the fingerprint sensing circuit 420 and the data line DL outputs a control signal SENSE indicating the detection timing, The fingerprint sensing circuit 420 and the data line DL can be electrically connected to each other.

Accordingly, the fingerprint sensing circuit 420 is electrically connected to the data line DL and detects a signal (a signal required for sensing the fingerprint) through the data line DL.

The detected signal may be a signal meaning a charge or a capacitance charged in the finger capacitor Cf between the pixel electrode PXL and the finger (valley or ridge of the fingerprint).

6 to 8 are operation mode timing diagrams of the display device 100 according to the embodiments of the present invention.

6 to 8, the display device 100 according to the embodiments of the present invention basically includes a display mode DM for displaying an image, a touch for detecting presence / absence of a touch and / And can operate in a sensing mode (TM).

That is, the operation mode of the display device 100 according to the embodiments of the present invention may basically include the display mode DM and the touch sensing mode TM.

A display mode section in which the display apparatus 100 operates in the display mode DM and a touch sensing mode section in which the display apparatus 100 operates in the touch sensing mode TM may be overlapped temporally, .

That is, the display device 100 may simultaneously operate in the display mode DM and the touch sensing mode TM. Alternatively, the operation period of the display apparatus 100 may be divided into a display mode period and a touch mode period, the display apparatus 100 may operate in a display mode DM during a display mode period, TM).

Meanwhile, the display device 100 according to embodiments of the present invention may operate in a fingerprint detection mode (FM) for fingerprint detection.

The fingerprint sensing mode section in which the display device 100 operates in the fingerprint sensing mode (FM) can be allocated in various manners.

As a first assignment method, the display apparatus 100 can operate in the fingerprint detection mode (FM) within the display mode section.

That is, the fingerprint sensing mode section may be overlapped with the display mode section for displaying the image.

For example, as shown in FIG. 6, the fingerprint sensing mode section is included in the display mode section, but may exist in the latter half of the display mode section.

In another example, the fingerprint sensing mode section is included in the display mode section, but may exist in the first half or the middle portion of the display mode section.

As a second allocation scheme, the display device 100 can operate in the fingerprint sensing mode (FM) within the touch sensing mode period.

That is, the fingerprint sensing mode section may overlap the touch sensing mode section for sensing the presence or absence of the touch or the touch position.

For example, as shown in FIG. 7, the fingerprint sensing mode section is included in the touch sensing mode section, but may exist in the first half of the touch sensing mode section.

As another example, the fingerprint sensing mode section may be included in the touch sensing mode section, but may be in the latter half or the middle portion of the touch sensing mode section.

As the third allocation mode, the display device 100 can operate in the fingerprint sensing mode (FM) between the display mode interval and the touch sensing mode interval.

As shown in FIGS. 6 and 7, the display mode section and the touch mode section may be defined by the first synchronization signal SYNC1.

In this case, the fingerprint sensing mode section can be defined by the second synchronization signal SYNC2.

Alternatively, the fingerprint sensing mode section may be defined without using the second synchronization signal SYNC2.

For example, referring to FIG. 6, if a predetermined time elapses after the display mode section is started or the display drive is completed to a predetermined position, the fingerprint sensing mode section may be performed for a predetermined time.

7, when the touch sensing mode section is started after the display mode section is completed, the fingerprint sensing mode section starts immediately, and when the fingerprint sensing mode section ends, the touch sensing procedure may be continued have.

Meanwhile, the display mode section, the fingerprint sensing mode section, and the touch sensing mode section may be defined in a predetermined order by one synchronization signal SYNC.

For example, as shown in FIG. 8, if the signal level of the synchronization signal SYNC changes from a low level (or a high level) to a high level (or a low level), the display mode section can proceed.

When the signal level of the synchronization signal SYNC is changed from the high level (or the low level) to the low level (or the high level) again and again the high level (or the low level) The section may proceed.

When the signal level of the synchronization signal SYNC is changed from the high level (or the low level) to the low level (or the high level) and then the high level (or the low level) again when the fingerprint sensing mode period ends, The mode section may proceed.

As described above, the display apparatus 100 can operate in the fingerprint sensing mode by allocating the fingerprint sensing mode section at various timings in accordance with the system environment.

9 is a view showing regions A1, A2, and A3 in the display panel 110 according to the embodiments of the present invention.

Referring to FIG. 9, in the display panel 110 according to the embodiments of the present invention, K data lines DL_1 to DL_K and H gate lines GL_1 to GL_H are arranged. Here, K is a natural number of 2 or more, and H is a natural number of 2 or more.

A plurality of pixels defined by the K data lines DL_1 to DL_K and the H gate lines GL_1 to GL_H may be arranged in the display panel 110. [

In the display panel 110, a pixel electrode PXL may be disposed in each of a plurality of pixel regions PA.

Referring to FIG. 9, H gate lines GL_1 through GL_H include N gate lines GL_M + 1 through GL_M + N. Here, M is a natural number of 1 or more, and N is a natural number of 1 or more.

The N gate lines GL_M + 1 to GL_M + N are gate lines used for fingerprint sensing driving for fingerprint sensing, and may be referred to as GL_F1 to GL_FN.

Referring to FIG. 9, the K data lines DL_1 to DL_K include Q data lines DL_P + 1 to DL_P + Q. Here, P is 0 or a natural number of 1 or more, and Q is a natural number of 1 or more.

The Q data lines DL_P + 1 to DL_P + Q are data lines used for display driving as well as fingerprint sensing driving.

9, among the N gate lines GL_F1 to GL_FN among the H gate lines GL_1 to GL_H and the Q data lines DL_P + 1 to DL_P + Q among the K data lines DL_1 to DL_K, The first area A1 including the pixel area PA defined by the fingerprint sensing area FPSA is a fingerprint sensing area FPSA for sensing fingerprint information.

Hereinafter, an example of allocating the fingerprint detection area FPAS will be described in more detail with reference to FIG.

9, the H gate lines GL_1 to GL_H include M gate lines GL_1 to GL_M including the first gate line GL_1 to the Mth gate line GL_M, And N gate lines GL_M + 1 to GL_M + N including gate lines GL_M + 1 to M + Nth gate lines GL_M + N.

The M gate lines GL_1 to GL_M may be referred to as GL_D1 to GL_DM as gate lines used only for display driving.

The N gate lines GL_M + 1 to GL_M + N may be arranged following the M gate lines GL_1 to GL_M.

The N gate lines GL_M + 1 to GL_M + N are gate lines used for fingerprint sensing driving for fingerprint sensing, and may be referred to as GL_F1 to GL_FN.

M is the total number of gate lines used exclusively for driving the display, and may be a natural number of 1 or more. N is the total number of gate lines used for fingerprint sensing driving, and may be a natural number of 1 or more. M + N is H (the total number of gate lines arranged in the display panel 110).

9, the N gate lines GL_F1 to GL_FN are arranged following the M gate lines GL_D1 to GL_DM, but they may be disposed in front of the M gate lines GL_D1 to GL_DM .

According to the above description, N gate lines GL_F1 to GL_FN among all the gate lines GL_1 to GL_H can be defined for fingerprint sensing driving.

9, the K data lines DL_1 to DL_K include P data lines DL_1 to DL_P including a first data line DL_1 to a Pth data line DL_P, Q data lines DL_P + 1 to DL_P + Q including the data lines DL_P + 1 to P + Qth data lines DL_P + Q and P + Q + 1th data lines DL_P + 1) to P + Q + R data lines DL_P + Q + 1, DL_P + Q + R including the data lines DL_P + Q + R.

The P data lines DL_1 to DL_P and the R data lines DL_P + Q + 1 and DL_P + Q + R are data lines used exclusively for display driving only.

The Q data lines DL_P + 1 to DL_P + Q are data lines used for display driving as well as fingerprint sensing driving.

Each of P and R is 0 or a natural number of 1 or more, and P + R can be 1 or more.

Q is the number of data lines used for fingerprint sensing driving and may be a natural number of 1 or more.

P + Q + R is K (the total number of data lines arranged in the display panel 110).

9, data lines for only display driving are arranged on both the left and right sides of the Q data lines DL_P + 1 to DL_P + Q used for the display driving and the fingerprint sensing driving, And data lines for only display driving may be disposed only on the right side.

When data lines for only display driving are disposed on only one of left and right sides of Q data lines (DL_P + 1 to DL_P + Q) used for display driving and fingerprint sensing driving, P or R is a zero .

According to the above description, Q data lines DL_P + 1 to DL_P + Q among all the data lines DL_1 to GL_K can be defined for fingerprint sensing driving.

As described above, the fingerprint sensing mode section in which the display device 100 operates in the fingerprint sensing mode (FM) may include a charging interval S10 and a sensing interval S20.

The driving states for the signal lines in the charging interval S10 and the sensing interval S20 in the fingerprint sensing mode interval will be described.

Referring to FIG. 9, during the charging period S10 of the fingerprint sensing mode in which the display device 100 operates in the fingerprint sensing mode (FM), the N gate lines (GL_F1 to GL_FN) A gate signal GATE of a turn-on level voltage (e.g., a high level voltage or a low level voltage) for turn-on of the switch SWT may be sequentially supplied.

During the charging period S10, the driving voltage VDRV, which is a voltage different from the video data voltage DATA, may be supplied to the Q data lines DL_P + 1 to DL_P + Q.

During the sensing period S20 within the fingerprint sensing mode section in which the display apparatus 100 operates in the fingerprint sensing mode FM, the gate signals GL_F1 to GL_FN of the fingerprint sensing driving purpose are applied to the gate signals GL_F1 to GL_FN of the turn- (GATE) may be sequentially supplied.

Also, during the sensing period S20, Q data lines DL_P + 1 to DL_P + Q for fingerprint sensing driving purposes may be electrically connected to the fingerprint sensing circuit 420. [

As described above, by allocating the N gate lines GL_F1 to GL_FN and Q data lines DL_P + 1 to DL_P + Q as signal lines for fingerprint sensing driving, The first area A1 is assigned to the fingerprint sensing area FPSA and the fingerprint sensing information is sensed in the first area A1 allocated to the fingerprint sensing area FPSA.

Referring to FIG. 9, M gate lines GL_D1 to GL_DM except for N gate lines GL_F1 to GL_FN among the H gate lines GL_1 to GL_H and K data lines DL_1 to DL_K The second area A2 including the defined pixel area PA may correspond to the display area (image display area).

In addition, KQ data lines DL_P + 1 to DL_P + Q excluding the Q data lines DL_P + 1 to DL_P + Q among the K data lines DL_1 to DL_K and N gate lines GL_F1 to GL_FN The third area A3 including the pixel area PA defined by the first area A3 may correspond to the display area (image display area).

When both P and R are natural numbers of 1 or more, the third area A3 can be divided into two areas by the first area A1, as shown in Fig.

When one of P and R is 0, the third area A3 may not be divided by the first area A1.

The second area A2 and the third area A3, which may be the display area, are not used as the fingerprint sensing area FPSA.

According to the above description, the display panel 110 can allocate a display area for displaying an image without being used for fingerprint detection.

The first area A1 includes a fingerprint sensing area FPSA for sensing fingerprint information during a fingerprint sensing mode interval and a fingerprint sensor sensing interval FPSA during a fingerprint sensing mode interval (a display mode interval or a display mode interval) , It may be a display area for video display.

As described above, by utilizing the first area A1 as a display area as well as the fingerprint detection area FPSA, it is possible to secure a display area capable of displaying an image as wide as possible, and instantaneous fingerprint recognition .

As a circuit for driving the display panel 110 and sensing the fingerprint, the display device 100 according to the embodiments of the present invention includes a gate driving circuit (not shown) for driving the H gate lines GL_1 to GL_H A data driving circuit 120 for driving the K data lines DL_1 to DL_K and a driving voltage generating circuit 130 for driving the driving voltage Vdd through the Q data lines DL_P + 1 to DL_P + Q among the K data lines DL_1 to DL_K, A driving voltage supply circuit 410 for supplying a driving voltage to the data lines DL_P + 1 to DL_P + Q and a Q signal line DL_P + 1 to DL_P + Q among the K data lines DL_1 to DL_K 420), and the like.

The gate driving circuit 130 may supply the gate signal GATE to the H gate lines GL_1 to GL_H or the M gate lines GL_D1 to GL_DM for the display driving.

The data driving circuit 120 may supply the image data voltage DATA to the K data lines DL_1 to DL_K for display driving.

During the fingerprint sensing mode period for detecting fingerprint information in the fingerprint sensing area FPSA, Q data lines DL_P + 1 to DL_P + Q and N gate lines GL_F1 to GL_FN for fingerprint sensing drive use .

The gate driving circuit 130 can sequentially supply the gate signal GATE to the N gate lines GL_F1 to GL_FN for use in fingerprint driving among the H gate lines GL_1 to GL_H for fingerprint driving.

The driving voltage supply circuit 410 may supply the driving voltage VDRV to Q data lines DL_P + 1 to DL_P + Q for fingerprint driving among the K data lines DL_1 to DL_K for fingerprint driving have.

The fingerprint sensing circuit 420 detects signals of Q data lines DL_P + 1 to DL_P + Q to detect fingerprints and generates N gate lines GL_F1 to GL_FN among the H gate lines GL_1 to GL_H (FPSA) corresponding to the first area A1 including the pixel area PA defined by the data lines DL_P + 1 to DL_P + Q and the Q data lines DL_P + 1 to DL_P + have.

The display apparatus 100 is capable of performing the fingerprint detection on the fingerprint sensing area FPSA defined by the N gate lines GL_F1 to GL_FN and the Q data lines DL_P + 1 to DL_P + Q, N driving lines GL_F1 to GL_FN and Q data lines DL_P + 1 to DL_P + Q for driving purposes are appropriately driven and signals are detected through Q data lines DL_P + 1 to DL_P + Q Fingerprint information can be detected.

10 to 12 are diagrams illustrating exemplary configurations of the data driving circuit 120 and the fingerprint sensing circuit 420 of the display device 100 according to the embodiments of the present invention.

10 to 12, the fingerprint sensing circuit 420 includes a signal detection circuit (TDC) 1010 for detecting a signal from Q data lines DL_P + 1 to DL_P + Q for fingerprint sensing driving, A micro control unit (MCU) 1020 that detects fingerprint information using the detection result of the signal detection circuit 1010, and the like.

5A, the signal detection circuit 1010 includes an amplifier AMP connected to Q data lines DL_P + 1 to DL_P + Q, and an amplifier AMP for receiving and integrating output signals of the amplifier AMP An integrator INTG that outputs an integral value, a sample and hold circuit SHA that stores an integral value, and an analog-to-digital converter (ADC) that converts the stored value into a digital value and outputs the digital value stored in the simple and hold circuit SHA . ≪ / RTI >

The signal detection circuit 1010 may further include one or more multiplexers between the Q data lines DL_P + 1 to DL_P + Q and the amplifier AMP and may include a simple and hold circuit SHA and an analog-to-digital converter ADCs) may further include one or more multiplexers.

As described above, since the fingerprint sensing circuit 420 is divided into the signal sensing circuit 1010 and the micro control unit 1020, the signal sensing function and the fingerprint sensing function can be efficiently performed and the circuit load can be reduced .

10 and 11, the signal detection circuit 1010 includes a data driving circuit DDC for supplying a video data voltage DATA to K data lines DL_1 to DL_K for display driving, 120 and a separate integrated circuit.

As shown in Fig. 10, the data driving circuit 120 and the signal detecting circuit 1010 may all be located on one side of the display panel 110. Fig.

11, the signal detection circuit 1010 may be located on one side of the display panel 110, and the data driving circuit 120 may be located on the other side of the display panel 110. [

12, the data driving circuit 120 and the signal detecting circuit 1010 may be included together in the integrated integrated circuit 1200. [

In this manner, the data driving circuit 120 and the signal detecting circuit 1010 are all included in one integrated integrated circuit 1200, so that the number of circuit components can be reduced.

Meanwhile, one of the data driving circuit 120, the fingerprint sensing circuit 420 and the driving voltage supplying circuit 410 may be electrically connected to the data line according to the operation mode.

That is, both the data driving circuit 120, the fingerprint sensing circuit 420, and the driving voltage supply circuit 410 are circuits connectable with the data lines.

The driving voltage supply circuit 410 is a circuit for supplying the driving voltage VDRV to Q data lines DL_P + 1 to DL_P + Q for fingerprint driving for fingerprint driving, Circuit 120 or may be included in the signal detection circuit 1010 of the fingerprint detection circuit 420. [

Alternatively, the driving voltage supply circuit 410 may be included in a circuit (for example, integrated integrated circuit 1200) including the data driving circuit 120, or may be included in the signal detection circuit 1010 of the fingerprint sensing circuit 420, (E.g., integrated integrated circuit 1200).

As described above, the circuits related to the data line DL can be integrally implemented, thereby reducing the number of circuit components.

13 to 15B are views for explaining a first fingerprint sensing driving method of the display apparatus 100 according to the embodiments of the present invention.

13 is a diagram showing a timing control switch circuit TCSW for the first fingerprint sensing drive of the display device 100 according to the embodiments of the present invention, 15A and 15B are operation truth tables of the timing control switch circuit TCSW for the first fingerprint sensing drive of the display device 100 according to the embodiment of the present invention, Fig.

15A and 15B, the fingerprint sensing mode section includes a charging interval S 10 and a sensing interval S 20.

The charging interval S10 and the sensing interval S20 may be performed within one frame interval or may be performed in different frame intervals.

15A and 15B illustrate an example in which the charging interval S10 proceeds after the display driving in the first frame interval and the sensing interval S20 proceeds after the display driving in the second frame interval Fig.

Accordingly, the period in which the M gate lines GL_D1 to GL_DM are sequentially driven in FIG. 15A is a period in which the display driving progresses in the first frame period, and in FIG. 15B, the M gate lines GL_D1 to GL_DM sequentially The driving period is a period during which the display driving progresses in the second frame period.

Referring to FIG. 15A, during the charging period S10, the gate driving circuit 130 sequentially supplies the gate signal GATE of the turn-on level voltage to the N gate lines GL_F1 to GL_FN.

Thus, among the N gate lines GL_F1 to GL_FN, the Q switching transistors SWT arranged in the pixel rows corresponding to the gate lines supplied with the gate signal GATE of the turn-on level voltage are turned on.

Therefore, in the corresponding pixel row, Q data lines DL_P + 1 to DL_P + Q and Q pixel electrodes PXL are electrically connected by the turned-on switching transistor SWT.

During the charging period S10, the driving voltage supply circuit 410 supplies the driving voltage VDRV to the Q data lines DL_P + 1 to DL_P + Q.

The drive voltage VDRV supplied to the Q data lines DL_P + 1 to DL_P + Q in the drive voltage supply circuit 410 is supplied to the pixels corresponding to the sequentially opened gate lines GL_F1 to GL_FN And is applied to the Q pixel electrodes PXL arranged in the row.

A corresponding finger capacitor Cf corresponding to the ridge or valley of the fingerprint is formed between each pixel electrode PXL and the finger.

When the predetermined period of time has elapsed after the charging period S10 described above, the sensing period S20 may proceed.

Referring to FIG. 15B, during the sensing period S20, the gate driving circuit 130 sequentially supplies the gate signal GATE of the turn-on level voltage to the N gate lines GL_F1 to GL_FN.

Thus, among the N gate lines GL_F1 to GL_FN, the Q switching transistors SWT arranged in the pixel rows corresponding to the gate lines supplied with the gate signal GATE of the turn-on level voltage are turned on.

Therefore, in the corresponding pixel row, Q data lines DL_P + 1 to DL_P + Q and Q pixel electrodes PXL are electrically connected by the turned-on switching transistor SWT.

During the sensing period S20, the driving voltage supply circuit 410 does not supply the driving voltage VDRV to the Q data lines DL_P + 1 to DL_P + Q.

During the sensing period S20, the fingerprint sensing circuit 420 is electrically connected to the Q data lines DL_P + 1 to DL_P + Q to detect the signals of the Q data lines DL_P + 1 to DL_P + Q can do.

According to the above-described first fingerprint sensing driving method, fingerprint sensing in the fingerprint sensing area FPSA of the display panel 110 can be enabled.

According to the above-described first fingerprint sensing driving method, each of the Q data lines DL_P + 1 to DL_P + Q used for the fingerprint sensing driving operation is supplied with the driving voltage VDRV from the driving voltage supply circuit 410 And is electrically connected to the signal detection circuit 1010 of the fingerprint detection circuit 420 to be sensed.

The Q data lines DL_P + 1 to DL_P + Q are also used for display driving. Therefore, each of the Q data lines DL_P + 1 to DL_P + Q may be supplied with the video data voltage DATA from the data driving circuit 120.

Therefore, in the embodiments of the present invention, the Q data lines DL_P + 1 to DL_P + Q have various applications (transfer of image data voltage (DATA), drive voltage (VDRV) Therefore, there is a need for a switch configuration for such various use changes.

The display device 100 according to the embodiments of the present invention further includes a timing control switch circuit TCSW for each of the Q data lines DL_P + 1 to DL_P + Q as shown in FIG. .

13, the timing control switch circuit TCSW for each of the Q data lines DL_P + 1 to DL_P + Q is connected to the corresponding data line among the Q data lines DL_P + 1 to DL_P + Whether or not the data line and the fingerprint sensing circuit 420 are electrically connected (second connection control), the data line and the data driving circuit (second connection control) 120 (second connection control) can be controlled.

Each timing control switch circuit TCSW may be implemented with one or more switch elements.

As an example, each timing control switch circuit TCSW may be implemented with one switch element or two or three switch elements.

The display driving and fingerprint sensing driving (driving voltage supply, signal detection) for Q data lines DL_P + 1 to DL_P + Q can be enabled by using the above-described timing control switch circuit TCSW.

13, 14 and 15, the timing control switch circuit TCSW can operate according to the first control signal CS1 and the second control signal CS2.

The first control signal CS1 and the second control signal CS2 may be provided in the micro control unit 1020 or the controller 140. [

In the first case, when the first control signal CS1 and the second control signal CS2 are at a first level (e.g., low level 0), each timing control switch circuit TCSW switches And performs an operation.

That is, when the first control signal CS1 and the second control signal CS2 are at the first level (for example, low level 0), each timing control switch circuit TCSW supplies the Q data lines DL_P + 1 to DL_P + Q), the image data voltage (DATA) may be supplied to the data line by electrically connecting the corresponding data line to the data driving circuit 120.

In the second case, when the first control signal CS1 is at a second level (e.g., high level 1) and the second control signal CS2 is at a first level (e.g., low level 0) The timing control switch circuit TCSW may perform the switching operation in the charging period S10 in the fingerprint sensing mode section.

That is, when the first control signal CS1 is at a second level (e.g., high level 1) and the second control signal CS2 is at a first level (e.g., low level 0) The circuit TCSW electrically connects the corresponding data line of the Q data lines DL_P + 1 to DL_P + Q to the driving voltage supply circuit 410 so that the driving voltage VDRV is supplied to the corresponding data line can do.

In a third case, when the first control signal CS1 is at a first level (e.g., low level 0) and the second control signal CS2 is at a second level (e.g., high level 1) The timing control switch circuit TCSW may perform the switching operation in the sensing period S20 within the fingerprint sensing mode section.

That is, when the first control signal CS1 is at a first level (e.g., low level 0) and the second control signal CS2 is at a second level (e.g., high level 1) The circuit TCSW electrically connects the corresponding data line of the Q data lines DL_P + 1 to DL_P + Q to the fingerprint sensing circuit 420 so that the signal detection circuit 1010 of the fingerprint sensing circuit 420 It is possible to control to detect the signal of the corresponding data line.

(Drive voltage supply, signal detection) for Q data lines DL_P + 1 to DL_P + Q in accordance with the switching operation control of each timing control switch circuit TCSW described above .

16 to 18B are views for explaining a second fingerprint sensing driving method of the display apparatus 100 according to the embodiments of the present invention.

16 is a timing control switch circuit TCSW for the second fingerprint sensing driving of the display device 100 according to the embodiments of the present invention. FIGS. 18A and 18B are operation truth tables of a timing control switch circuit (TCSW) for the second fingerprint sensing drive of the display device 100 according to the embodiment of the present invention. Fig.

The second fingerprint sensing driving method is basically the same as the first fingerprint sensing driving method.

However, in the fingerprint sensing operation, the parasitic capacitance components that may occur in the Q data lines DL_P + 1 to DL_P + Q are removed or the voltage state of the Q data lines DL_P + 1 to DL_P + Q is reset ) Is added.

16 to 18B, only the difference from the first fingerprint sensing driving method will be described when explaining the second fingerprint sensing driving method.

18B, during the sensing interval S20, the fingerprint sensing circuit 420 outputs Q data lines DL_P + 1 to DL_P (DL_P + 1 to DL_P + Q) before detecting the signals of the Q data lines DL_P + + Q). ≪ / RTI >

Therefore, in the sensing period S20, the parasitic capacitance component is removed from the Q data lines DL_P + 1 to DL_P + Q and is obtained based on the signal detected through the Q data lines DL_P + 1 to DL_P + Q The accuracy of the fingerprint information can be increased.

Also, immediately before the signal detection of the Q data lines DL_P + 1 to DL_P + Q, the voltage state of the Q data lines DL_P + 1 to DL_P + Q is reset to the reference voltage VREF , The signals of the Q data lines DL_P + 1 to DL_P + Q are detected, so that the accuracy of fingerprint information obtained based on the detected signals can be enhanced.

16 and 17, the Q data lines DL_P + 1 to DL_P + Q are used to transfer a video data voltage DATA, a driving voltage VDRV, It is also used as a reference voltage (VREF) transmission purpose in addition to a sensing path. Thus, each timing control switch circuit TCSW performs a switching operation for various usage changes including transmission of the reference voltage VREF of the Q data lines DL_P + 1 to DL_P + Q.

When the first control signal CS1 is at the second level and the second control signal CS2 is at the second level with respect to the transfer of the reference voltage VREF, each timing control switch circuit TCSW is for the reference voltage supply The switching operation can be performed.

That is, when the first control signal CS1 is at the second level and the second control signal CS2 is at the second level, each of the timing control switch circuits TCSW includes Q data lines DL_P + 1 to DL_P + Q The fingerprint sensing circuit 420 may control the data line to supply the reference voltage VREF to the corresponding data line by electrically connecting the corresponding data line to the signal detection circuit 1010 of the fingerprint sensing circuit 420. [

The amplifier included in the signal detection circuit 1010 outputs the reference voltage VREF input to the positive terminal in the negative stage so that the reference voltage VREF is supplied to the Q data lines DL_P + To < RTI ID = 0.0 > DL_P + Q. ≪ / RTI >

The reference voltage VREF can be effectively supplied to the Q data lines DL_P + 1 to DL_P + Q in accordance with the switching operation control of each timing control switch circuit TCSW described above.

The above-described fingerprint sensing method is a capacitance-based fingerprint sensing method, and optical type fingerprint sensing is also possible.

In the following, the above-described fingerprint detection structure and fingerprint detection drive timing are used as they are, and an optical fingerprint detection function is added.

Therefore, the description of the fingerprint sensing structure, the fingerprint sensing driving timing, and the like described above will be omitted and only the contents related to the sensing of the fingerprint sensing in the optical system will be mainly described.

19 to 22B are views for explaining a third fingerprint sensing driving method (a fingerprint sensing driving method of an optical system) of the display device 100 according to the embodiments of the present invention.

FIG. 19 is a view showing an optical fingerprint sensing structure of a display device 100 according to an embodiment of the present invention, and FIG. 20 is a schematic diagram illustrating an optical fingerprint sensing of a display device 100 according to an embodiment of the present invention. Fig. 21 is a diagram showing a light irradiation apparatus 2000 of the display apparatus 100 according to the embodiments of the present invention. Fig.

19 and 20, in each pixel area PA included in the first area A1 corresponding to the fingerprint sensing area FPSA, as described above, the N gate lines (DL_P + 1 to DL_P + Q) controlled by the gate signal GATE applied to the gate node E3 through the corresponding gate line among the data lines GL_F1 to GL_FN and the corresponding pixel electrode A switching transistor SWT electrically connected between the first and second electrodes PXL and PXL may be disposed.

19 and 20, both ends of the pixel region PA included in the first region A1 corresponding to the fingerprint sensing region FPSA are connected to the source node E1 or E2 of the switching transistor SWT, And a photosensor PS connected to the drain node E2 or E1.

Referring to FIG. 21, a display device 100 according to embodiments of the present invention may include a light irradiation device 2100 that emits light to a photosensor PS.

The light irradiating device 2100 includes an optical output device 2110 for outputting light and a light guide device 2110 for guiding the light output from the light output device 2110 to a pixel area PA having the optical sensor PS. (2120), and the like.

The light guide device 2120 is similar to the light guide plate and may be located on the layer on which the switching transistor SWT is formed.

The light output from the light output device 2110 is totally reflected by the light guide device 2120 and is transmitted to the pixel area PA having the optical sensor PS.

Here, the light guide device 2120 may be located on a layer on which the switching transistor SWT is formed.

21, a display device 100 according to embodiments of the present invention includes an optical output timing controller 2130 for controlling the timing (light irradiation timing) at which light is output from the optical output device 2110 ).

The light output timing control device 2130 may be a micro control unit 1020 or a controller 140. [

The photosensor PS has a property of reacting with light, that is, photosensitivity. Here, the reaction (light reaction) with respect to light means that electrical characteristics change.

In the display device 100 according to the embodiments of the present invention, the photosensor PS has photosensitivity to light of a specific wavelength band.

The photosensor (PS) operates as a nonconductor in the pre-irradiation state, and acts as a conductor when the light is irradiated, so that electrical characteristics are changed and both ends are electrically connected. Here, the optical sensor PS is also referred to as a photosensor.

Therefore, the gate signal of the turn-off level voltage VGL is applied to the gate node E3 of the switching transistor SWT and the gate signal of the turn-off level voltage VGL is applied between the first node E1 and the second node E2 of the switching transistor SWT In the presence of a potential difference, when light is applied to the photosensor PS, the photosensor PS generates a leakage current Ioff between the first node E1 and the second node E2 of the switching transistor SWT .

The type of light irradiated to the optical sensor PS may be determined depending on the material of the optical sensor PS.

For example, the light irradiated to the photosensor PS may be, for example, visible light or infrared light.

If the photosensor PS is a material (for example, amorphous silicon) that reacts well with visible light, the irradiated light may be determined to be visible light.

If the photosensor PS is a material that reacts well to infrared rays (e.g., amorphous silicon, amorphous silicon doped with n + or p +), the irradiating light may be determined by infrared light.

As described above, by selecting the effective irradiation light in consideration of the degree of photoreactivity depending on the material of the optical sensor PS, it is possible to improve the touch sensing performance using the optical sensor PS.

On the other hand, if the touch is located around the pixel area PA in which the photosensor PS is disposed, the conductivity of the photosensor PS that is irradiated with light can be changed.

When the touch is located in the vicinity of the pixel area PA in which the optical sensor PS is disposed, the conductivity of the optical sensor PS that has been irradiated may vary depending on the ridge and valley of the fingerprint.

The fingerprint sensing circuit 420 can obtain fingerprint information based on the difference in conductivity of the photosensor PS depending on the ridge and valley of the fingerprint (that is, the difference in magnitude of the leakage current).

According to the above description, by further applying the optical system to the capacitance system, it is less influenced by the noise of the parasitic capacitor or the like, and thus the fingerprint detection can be more accurately performed.

22A and 22B are drive timing diagrams for the third fingerprint sensing drive of the display device 100 according to the embodiments of the present invention.

The drive timing diagrams shown in Figs. 22A and 22B are basically the same as the drive timing diagrams shown in Figs. 18A and 18B, and only the signal waveform relating to the light irradiation timing is added.

Referring to FIGS. 22A and 22B, the fingerprint sensing mode section includes a charging interval S10 and a sensing interval S20.

Referring to FIG. 22A, during the charging period S10, the gate driving circuit 130 sequentially supplies the gate signal GATE of the turn-on level voltage to the N gate lines GL_F1 to GL_FN, The circuit 410 supplies the driving voltage VDRV to the Q data lines DL_P + 1 to DL_P + Q.

22B, during the sensing period S20, the light emitter 2100 emits light to the photosensor PS, and the gate driving circuit 130 turns on the N gate lines GL_F1 to GL_FN, Level voltage gate signal GATE sequentially and the driving voltage supply circuit 410 supplies the driving voltage VDRV to the Q data lines DL_P + 1 to DL_P + Q unfiltered, The data driver 420 may be electrically connected to Q data lines DL_P + 1 to DL_P + Q to detect signals of Q data lines DL_P + 1 to DL_P + Q.

Hereinafter, the above-described fingerprint detection and the driving method therefor will be briefly described below.

23 is a schematic flowchart of a method of driving the display apparatus 100 according to the embodiments of the present invention.

23, a driving method of a display device 100 according to an embodiment of the present invention includes a step of supplying N (N is a natural number of 1 or more) gate lines and K data lines (Fingerprint detection event) for a fingerprint detection mode for detecting fingerprint information in an area including a pixel area PA defined by Q (Q is a natural number of 1 or more) data lines DL_1 to DL_K A gate signal GATE of a turn-on level voltage is sequentially supplied to the N gate lines GL_F1 to GL_FN and the Q data lines DL_P + 1 to GL_FN are sequentially supplied to the N gate lines GL_F1 to GL_FN, A charging step S2320 of supplying a driving voltage VDRV which is a voltage different from the video data voltage DATA to the gate signal GATE (DL_P + Q) of the turn-on level voltage by the N gate lines GL_F1 to GL_FN, ) And sequentially supplies the Q data lines DL_P + 1 to DL_P + Q, US supply a drive voltage (VDRV) to, and may comprise a detection step (S2330) of detecting a signal of the Q data line (DL_P + 1 ~ DL_P + Q) and the like.

The start event for the fingerprint detection mode can be generated by various functions of the display apparatus 100, various application programs, and the like.

For example, in a mobile device such as a smart phone, when a lock screen release function is executed, a start event for a fingerprint detection mode may occur.

As another example, a start event (a fingerprint detection event) may be generated for a fingerprint detection mode when a user is authenticated in a web browser program, an application store application program, a product purchase application program, or a financial application program.

The fingerprint sensing area FPSA defined by the N gate lines GL_F1 to GL_FN and the Q data lines DL_P + 1 to DL_P + The gate lines GL_F1 to GL_FN and the Q data lines DL_P + 1 to DL_P + Q are appropriately driven and signals are detected through the Q data lines DL_P + 1 to DL_P + Q to detect fingerprint information can do.

On the other hand, the reference voltage VREF can be supplied to the Q data lines DL_P + 1 to DL_P + Q before the signals of the Q data lines DL_P + 1 to DL_P + Q are detected in the sensing step S2330 have.

FIG. 24 is a circuit diagram for fingerprint sensing according to embodiments of the present invention.

Referring to FIG. 24, the circuit for fingerprint sensing according to embodiments of the present invention includes Q data lines DL_P + 1 to DL_P + Q for fingerprint sensing driving among K data lines DL_1 to DL_K A first circuit 410 for supplying a driving voltage VDRV and a second circuit 1010 for detecting signals of Q data lines DL_P + 1 to DL_P + Q.

Using the first circuit 410 and the second circuit 1010 described above, it is possible to detect fingerprint information by driving Q data lines DL_P + 1 to DL_P + Q for fingerprint sensing driving.

The second circuit 1010 described above is capable of outputting the reference voltage VREF to the Q data lines DL_P + 1 to DL_P + Q before detecting the signals of the Q data lines DL_P + 1 to DL_P + Q Can supply.

Accordingly, the parasitic capacitance component is removed from the Q data lines DL_P + 1 to DL_P + Q, and the accuracy of the fingerprint information obtained based on the signals detected through the Q data lines DL_P + 1 to DL_P + Q can be increased have.

Also, immediately before the signal detection of the Q data lines DL_P + 1 to DL_P + Q, the voltage state of the Q data lines DL_P + 1 to DL_P + Q is reset to the reference voltage VREF , The signals of the Q data lines DL_P + 1 to DL_P + Q are detected, so that the accuracy of fingerprint information obtained based on the detected signals can be enhanced.

24, the circuit for sensing fingerprint according to embodiments of the present invention further includes a third circuit 120 for supplying a video data voltage DATA to K data lines DL_1 to DL_K .

Therefore, not only fingerprint detection but also display driving can be provided.

24, the circuit for fingerprint detection according to embodiments of the present invention may further include a timing control switch circuit TCSW for each of Q data lines DL_P + 1 to DL_P + Q .

The timing control switch circuit TCSW controls whether the corresponding data line among the Q data lines DL_P + 1 to DL_P + Q is electrically connected to the first circuit 410 (whether or not the X1 and Y points are connected) Whether or not the data line is electrically connected to the second circuit 1010 (whether or not the X2 point and the Y point are connected), whether or not the corresponding data line and the third circuit 120 are electrically connected (the connection between the X3 point and the Y point Or not).

The timing control switch circuit TCSW may be implemented including one or more switch elements.

The display driving and the fingerprint sensing drive (driving voltage supply, signal detection) for the Q data lines DL_P + 1 to DL_P + Q can be efficiently provided by using the timing control switch circuit TCSW described above.

25 is a diagram illustrating a touch sensing configuration of the display device 100 according to the embodiments of the present invention.

25, a display device 100 according to an embodiment of the present invention may include a touch panel (not shown) disposed on a display panel 110 to detect presence or touch of a finger or a touch object A touch sensing circuit TSC 2500 that drives at least one of the plurality of touch electrodes TE and the plurality of touch electrodes TE to sense presence or touch of the touch with the finger or the touch object .

The display panel 110 may be provided with a plurality of signal lines SL for electrically connecting the plurality of touch electrodes TE to the touch sensing circuit 2500.

The display device 100 according to embodiments of the present invention may be a self-capacitance-based touch sensing method or a mutual capacitance-based touch sensing method. The display device 100 may include a finger touch or a touch object (e.g., a pen) Coordinates can be detected.

For example, when the display device 100 according to the embodiments of the present invention detects the presence or absence of a touch or touch coordinates by a finger or a touch object (e.g., a pen) in a self-capacitance based touch sensing method, The circuit 2500 applies a driving signal to at least one of the plurality of touch electrodes TE, detects a signal from the touch electrode TE to which the driving signal is applied, detects the touch presence or touch coordinates based on the detected signal, have.

For example, when the display device 100 according to the embodiments of the present invention senses whether or not a touch is made by a finger or a touch object (e.g., a pen, etc.) or touch coordinates using a mutual capacitance based touch sensing method, The sensing circuit 2500 applies a driving signal to at least one driving touch electrode among the plurality of touch electrodes TE, detects a signal from at least one sensing touch electrode among the plurality of touch electrodes TE, Based on the signal, it is possible to detect touch or touch coordinates.

The above-described touch sensing circuit 2500 may have the same or similar circuit configuration (AMP, INTG, SHA, ADC) as the fingerprint sensing circuit (FPSC) of Fig. 5B in terms of internal circuit configuration. The wiring electrically connected to the inverting input terminal (-) of the amplifier AMP is a signal line SL in the case of the touch sensing circuit 2500 and a data line DL in the case of the fingerprint sensing circuit FPSC But the rest can be almost the same.

FIGS. 26 and 27 are views showing positions of the fingerprint detection area FPSA in the display panel 110 according to the embodiments of the present invention.

26 and 27, the position of the first area A1 corresponding to the fingerprint detection area FPSA is not located on one side of the entire area of the screen as in the example of Fig. 9, Lt; / RTI >

Hereinafter, a more detailed description will be given with reference to Figs. 26 and 27. Fig.

Referring to FIG. 26, in the display panel 110 according to the embodiments of the present invention, K data lines and H gate lines are arranged. Here, K is a natural number of 2 or more, and H is a natural number of 2 or more.

Referring to FIG. 26, H gate lines include M gate lines including first gate lines GL_1 to M_M, M + 1th gate lines GL_M + 1 to M + N + 1) -th gate lines GL_M + N + 1 to M + N + S-th gate lines GL_M + N + S, including N gate lines GL_M + Gt; S < / RTI > Here, each of M and S is a natural number of 0 or 1, and M + S may be 1 or more. N may be a natural number of 1 or more. M + N + S can be H.

Referring to FIG. 26, the K data lines include P data lines including first data lines DL_1 to P_data lines DL_P, P + 1th data lines DL_P + 1 to P + Q data lines including the Qth data line DL_P + Q and the P + Q + 1th data line DL_P + Q + 1 through P + Q + Rth data line DL_P + Q + ≪ / RTI > Here, each of P and R is 0 or a natural number of 1 or more, and P + R may be 1 or more. Q may be a natural number of 1 or greater. P + Q + R can be K.

The N gate lines GL_M + 1 to GL_M + N are gate lines driven for display driving, and gate lines GL_F1 to GL_FN for fingerprint sensing driving for fingerprint sensing.

The Q data lines DL_P + 1 to DL_P + Q are data lines driven for display driving and data lines used for fingerprint sensing driving, and may also be referred to as DL_F1 to DL_FQ.

The first area A1 including a pixel area defined by N gate lines GL_F1 to GL_FN and Q data lines DL_F1 to DL_FQ may be a display area and a fingerprint sensing area FPSA.

A second area A2 including a pixel area defined by H-N gate lines and K data lines excluding N gate lines GL_F1-GL_FN among H gate lines may be a display area.

A third area A3 including a pixel area defined by KQ data lines excluding the Q data lines DL_F1 to DL_FQ among the K data lines and N gate lines GL_F1 to GL_FN is a display area .

26 and 27, if S is not 0, the second area A2 may be located on one side and the other side of the first area A1 and the third area A3.

When S becomes 0, it can be the same as in Fig. In this case, the second area A2 may be located only on one side of the first area A1 and the third area A3.

The size, number and position of the first area A1 corresponding to the fingerprint detection area FPSA may be fixed at all times, but at least one of the size, number and position of the first area A1 may be varied .

Also, at least one of the size, the number, and the position of the first area A1 corresponding to the fingerprint detection area FPSA may vary according to time, situation, and the like.

The driving method for fingerprint detection of the display device 100 according to the embodiments of the present invention is not a method considering touch driving for detecting touch coordinates by performing fingerprint detection in accordance with gate driving, Fingerprint detection is performed in the area (fingerprint detection area). That is, in the display device 100 according to the embodiments of the present invention, the sensing sensor utilizing the pixel structure is located in a partial area within the display area.

In the display device 100 according to the embodiments of the present invention, fingerprint driving for fingerprint sensing may operate in real time, such as touch driving to detect touch coordinates, but may not need to continue in real time.

If the fingerprint drive continues to occur in real time like touch driving, it may be difficult to secure a charge time for display at a high resolution because a time interval for touch detection must be separately allocated.

In the following, the display device 100 according to the embodiments of the present invention describes examples of timing for fingerprint driving for fingerprint sensing.

FIG. 28 is a flowchart of a method of driving the display device 100 according to the embodiments of the present invention, FIG. 29 is a diagram illustrating a fingerprint sensing scenario of the display device 100 according to the embodiments of the present invention, And FIG. 31 is a diagram showing a driving timing diagram according to a fingerprint sensing scenario of the display device 100 according to the embodiments of the present invention.

The fingerprint sensing circuit 420 may generate the fingerprint sensing area FPSA according to the generation of the fingerprint sensing event, 1 area A1 and finger touch information is detected in the first area A1 when a finger touch is detected in the first area A1 set as the fingerprint detection area FPSA by the touch sensing circuit 2500 Detection.

28 and 29, the driving method of the display device 100 according to the embodiments of the present invention includes a normal driving step S2810, a fingerprint sensing preparation step S2820, and a fingerprint sensing step S2830), and the like.

In the normal drive step S2810, the display device 100 according to the embodiments of the present invention displays a display mode DM for displaying a normal image, a touch by a finger or a touch object Or touch sensing mode (TM) which detects touch coordinates, can be time-divided or simultaneously performed.

During the display mode in which the display mode DM is performed, the display device 100 drives the sub-pixels arranged in the display panel 110 using the data driving circuit 120 and the gate driving circuit 130 . Accordingly, in the normal driving step S2810, the normal image NS can be displayed on the display panel 110. [

During the touch sensing mode in which the touch sensing mode TM is performed, the display device 100 uses at least one of the plurality of touch electrodes TE arranged on the display panel 110 using the touch sensing circuit 2600 A driving signal is applied and a sensing signal is detected from at least one of the plurality of touch electrodes TE and the presence or absence of a touch or touch coordinates by a finger or a touch object can be detected based on the detected signal.

As described above, the display mode DM and the touch sensing mode TM may be time-divided as shown in FIGS. 30 and 31 and may be performed at different time zones, or simultaneously in the same time zone.

If the predetermined fingerprint sensing event occurs after the normal driving step S2810 is performed, the fingerprint sensing preparation step S2820 is performed.

Here, the fingerprint detection event may occur in the user authentication procedure, for example, in an application executed in the display device 100, for example.

Here, for example, the above-mentioned application may be a web browser program, an application related to an application store, an application related to purchasing a product, an application related to a bank, a security and related applications, a game, music,

In the fingerprint sensing preparation step S2820, when the occurrence of the fingerprint sensing event is recognized, the display device 100 according to the embodiments of the present invention displays the first area A1, which is a partial area within the entire screen area, (FPSA), detects whether or not the finger is touched in the first area A1 set as the fingerprint sensing area FPSA, and detects the touch of the finger in the first area A1 set as the fingerprint sensing area FPSA The first fingerprint detection screen FPSS1, which is changed according to the detection result of the first fingerprint detection, can be displayed.

Here, for example, a fingerprint recognition guidance phrase such as "Please raise your finger for fingerprint recognition" and the like may be displayed on the first fingerprint detection screen FPSS1, and a fingerprint detection area (FPSA)) can be indicated separately.

During the fingerprint detection preparation step (S2820), if a finger touch is not detected in the first area A1 set as the fingerprint detection area FPSA for a predetermined period of time or an input indicating that fingerprint recognition is unnecessary ), It may be returned to the normal driving step S2810.

If a finger touch is detected in the first area A1 set as the fingerprint sensing area FPSA (finger ON detection), the fingerprint sensing step S2830 is performed while the fingerprint sensing preparation step S2820 is being performed.

In the fingerprint sensing step S2830, the display device 100 according to the embodiment of the present invention displays a fingerprint in the first area A1 set as the fingerprint sensing area FPSA, The fingerprint information in the first area A1 set to the FPSA can be detected and the second fingerprint detection screen FPSS2 changed according to the detection result of the fingerprint information can be displayed.

Here, the second fingerprint detection screen FPSS2 includes a fingerprint recognition process instruction word such as "Fingerprint recognition is in progress "," Fingerprint recognition is complete & It can be displayed as the process changes.

29 to 30, the fingerprint detection step (S2830) will be described in more detail.

In the fingerprint sensing step S2830, the DM (display mode) section and the DM / TM / FM (display mode / touch sensing mode / fingerprint sensing mode) sections may be alternated.

The second fingerprint detection screen FPSS2 is displayed through the remaining areas A2 and A3 excluding the first area A1 set as the fingerprint detection area FPSA in the DM section, .

In the DM section, the first area A1 set as the fingerprint sensing area FPSA is set in accordance with the driving timing of the gate lines GL_F1 to GL_FN corresponding to the first area A1 set as the fingerprint sensing area FPSA, (VDRV, ex. 5V) for fingerprint sensing application is applied to the data lines DL_F1 to DL_FQ corresponding to the data lines DL_F1 to DL_FQ.

Meanwhile, during the fingerprint sensing step S2830, since the finger of the user covers the fingerprint sensing area FPSA, the display driving data voltage is applied to the first area A1 set as the fingerprint sensing area FPSA Even if the image state becomes unstable due to not being applied, the user can not recognize this at all. The DM section corresponds to the charging step S10 in Figs. 15A and 18A.

The DM / TM / FM section after the DM section is a section where display driving, touch driving for touch sensing, and fingerprint driving for fingerprint sensing are combined.

During the DM / TM / FM period, light irradiation is performed, and after the reference voltage (VREF) is applied to the data lines, further gate driving is performed and fingerprint sensing is performed in the fingerprint sensing area (FPSA).

During the DM / TM / FM period, the gate lines must be driven sequentially for display driving and fingerprint driving.

When the gate lines arranged corresponding to the area A2 other than the first area A1 set as the fingerprint sensing area FPSA are turned on during the DM / TM / FM section, the second fingerprint sensing screen FPSS2 ), The display driving data voltages output from the DM section can be applied to the corresponding data lines in the same manner.

During the DM / TM / FM period, the data lines DL_F1 to DL_FQ arranged in the first area A1 set as the fingerprint sensing area FPSA are not applied with the display driving data voltage, (GL_F1 to GL_FN) arranged in the first area A1 set to the first area A1 (FPSA).

During the DM / TM / FM period, the data lines DL_F1 to DL_FQ arranged in the first area A1 set as the fingerprint sensing area FPSA are sensed by the fingerprint sensing circuit 420.

During the DM / TM / FM period, the touch sensing circuit 2500 partially performs touch driving only on the first area A1 set as the fingerprint sensing area FPSA, It is checked whether or not it is continuously in contact with the screen.

If the user removes the finger from the fingerprint detection area FPSA without finishing the fingerprint detection, the process immediately returns to the fingerprint detection preparation step S2820 to minimize the exposure of the abnormal display state in the fingerprint detection area FPSA give.

If the fingerprint detection is normally completed, the process returns to the normal driving step (S2810). The DM / TM / FM section corresponds to the charging step S10 in Figs. 15B and 18B.

After the fingerprint sensing step S2830 is completed, the normal driving step S2810 may be performed again.

As described above, if the finger touching the first area A1 set as the fingerprint sensing area FPSA falls off the screen (the fingerprint is detected) before the fingerprint sensing step S2830 starts to proceed and the fingerprint sensing is completed Finger OFF during detection), the fingerprint detection preparation step (S2820), or the normal driving step (S2810).

Meanwhile, the display device 100 according to the embodiments of the present invention may be a liquid crystal display device having a sub-pixel structure as shown in FIGS. 3A and 3B, but may also be an organic light emitting display device.

32, description will be made on a fingerprint sensor structure when the display device 100 according to the embodiment of the present invention is an organic light emitting display device.

32 is an equivalent circuit of the fingerprint sensor structure when the display device 100 according to the embodiments of the present invention is an organic light emitting display device.

32, a subpixel includes an organic light emitting diode (OLED), a driving transistor DRT for driving the organic light emitting diode OLT, and a driving transistor DRT electrically connected between the first node N1 and the data line DL of the driving transistor DRT. And a storage capacitor Cstg electrically connected between the first node N1 and the second node N2 of the driving transistor DRT.

The organic light emitting diode OLED may include a first electrode connected to the second node N2 of the driving transistor DRT, an organic light emitting layer, and a second electrode to which the base voltage EVSS is applied.

In the driving transistor DRT, the first node N1 may correspond to a gate node, the second node N2 may be a source node or a drain node to which the first electrode of the organic light emitting diode OLED is connected, The third node N3 may be a drain node or a source node to which the drive voltage EVDD is applied.

The storage capacitor Cstg includes a first plate PLT1 electrically connected to the first node N1 of the driving transistor DRT and a second plate PL2 electrically connected to the second node N2 of the driving transistor DRT. PLT2).

The switching transistor SWT transfers the image data voltage from the data line DL to the first node N1 of the driving transistor DRT in a turn-on state. The image data voltage transferred to the first node N1 of the driving transistor DRT is also applied to the first plate PLT1 of the storage capacitor Cstg.

Here, the first plate PLT1 of the storage capacitor Cstg corresponds to the role of the pixel electrode PXL in the fingerprint sensor structure of Figs. 3A and 3B.

The switching transistor SWT includes a first node E1 electrically connected to the first plate PLT1 of the storage capacitor Cstg, a second node E2 electrically connected to the data line DL, A third node E3 electrically connected to the first node E1 and a second node E2 connected to the first node E1 and the second node E2.

The switching transistor SWT can be controlled on and off according to the gate signal (also referred to as a scan signal) of the third node E3 from the gate line GL.

In the switching transistor SWT, the first node E1 may be a drain node (drain node) or a source node (source node). The second node E2 may be a source node or a drain node. The third node E3 may be a gate node.

The switching transistor SWT may be an n-type transistor or a p-type transistor.

32, in addition to the above-described pixel structure or the modified pixel structure, the fingerprint sensor structure using the structure shown in Fig. 32 is provided between the first node E1 and the second node E2 of the switching transistor SWT in the same manner as in Fig. An electrically connected photosensor (PS), and the like.

According to the embodiments of the present invention described above, the display device 100, the display panel 110, and the fingerprint sensing method, which can detect fingerprints without separately providing a fingerprint sensor outside the display panel 110, Can be provided.

According to the embodiments of the present invention, the display device 100, the display panel 110, the fingerprint sensor 110, and the fingerprint sensor 120 may be configured such that a partial area A1 of the display panel 110 is allocated to the fingerprint detection area FPSA, A sensing method and a circuit therefor can be provided.

According to embodiments of the present invention, it is possible to provide a display device 100, a display panel 110, a fingerprint sensing method, and a circuit therefor capable of performing fingerprint sensing by utilizing a pixel structure as a fingerprint sensing structure have.

In addition, according to the embodiments of the present invention, it is possible to provide a display device 100, a display panel 110, a fingerprint sensing method, and a circuit therefor that enable fingerprint recognition in an application program screen.

In addition, according to the embodiments of the present invention, it is possible to provide a display device 100, a display panel 110, a fingerprint sensing method, and a circuit therefor that enable optical fingerprint sensing as well as capacitance based fingerprint sensing have.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: display device
110: Display panel
120: Data driving circuit
130: Gate driving circuit
140: controller
410: driving voltage supply circuit
420: fingerprint detection circuit
1010: Signal detection circuit
1020: Micro control unit

Claims (29)

And a plurality of pixel regions defined by the K data lines and the H gate lines are arranged in a matrix form in which a plurality of data lines are arranged in a matrix, K (K is a natural number of 2 or more) data lines, H (H is a natural number of 2 or more) A display panel in which pixel electrodes are arranged for each pixel region;
A gate driving circuit for driving the H gate lines;
A data driving circuit for driving the K data lines;
A driving voltage supply circuit for supplying a driving voltage to Q (Q is a natural number of 1 or more) data lines among the K data lines; And
Detecting a signal of the Q data lines and outputting fingerprint information in a first area including a pixel area defined by N (N is a natural number of 1 or more) gate lines and Q data lines among the H gate lines And a fingerprint detection circuit for detecting the fingerprint. The method according to claim 1,
The H number of gate lines are connected to each other,
M gate lines including a first gate line to an Mth gate line,
N gate lines including (M + 1) -th gate lines to (M + N) -th gate lines,
And S gate lines including M + N + 1 th gate lines to M + N + S th gate lines,
Each of M and S is a natural number of 0 or 1, M + S is 1 or more,
N is a natural number of 1 or more,
And M + N + S is H. The method according to claim 1,
Wherein the K data lines comprise:
P data lines including a first data line to a Pth data line,
Q data lines including (P + 1) th data lines to (P + Q) th data lines,
P + Q + 1th data line to P + Q + Rth data line,
Each of P and R is a natural number of 0 or 1, P + R is 1 or more,
Q is a natural number of 1 or more,
And P + Q + R is the K. The method according to claim 1,
Wherein a first area including a pixel area defined by the N gate lines and the Q data lines is a fingerprint sensing area,
And a second region including a pixel region defined by the H data lines and the HN gate lines excluding the N gate lines among the H gate lines is a display region. 5. The method of claim 4,
And a third region including a pixel region defined by the N gate lines is a display region. 6. The method of claim 5,
Wherein the second region is located only on one side of the first region and the third region or on one side and the other side of the first region and the third region. The method according to claim 1,
Wherein the first region comprises:
A fingerprint sensing area for sensing fingerprint information during a fingerprint sensing mode section,
Wherein the display area is a display area for displaying an image during a period other than the fingerprint sensing mode period. The method according to claim 1,
Wherein the first region comprises:
A fingerprint sensing area for sensing fingerprint information during a fingerprint sensing mode section,
During the fingerprint sensing mode interval,
And the Q data lines and the N gate lines are driven. 9. The method of claim 8,
Wherein the fingerprint sensing mode section overlaps the display mode section for displaying an image. 9. The method of claim 8,
Wherein the fingerprint sensing mode section is overlapped with a touch sensing mode section for sensing presence or absence of a touch or a touch position. 9. The method of claim 8,
Wherein the fingerprint sensing mode section exists between the display mode section and the touch sensing mode section. The method according to claim 1,
The fingerprint sensing circuit may include:
A signal detection circuit for detecting a signal from the Q data lines,
And a micro control unit for sensing fingerprint information using the detection result of the signal detection circuit. 12. The method of claim 11,
The driving voltage supply circuit includes:
The data driving circuit or the signal detecting circuit,
Wherein the circuit including the data driving circuit or the circuit including the signal detecting circuit is included. The method according to claim 1,
The fingerprint sensing mode section includes a charging section and a sensing section,
During the charging interval,
The gate driving circuit sequentially supplies a gate signal of a turn-on level voltage to the N gate lines,
Wherein the driving voltage supply circuit supplies the driving voltage to the Q data lines,
During the sensing interval,
The gate driving circuit sequentially supplies a gate signal of a turn-on level voltage to the N gate lines,
The driving voltage supply circuit may not supply the driving voltage to the Q data lines,
Wherein the fingerprint sensing circuit is electrically connected to the Q data lines to detect signals of the Q data lines. 15. The method of claim 14,
The fingerprint sensing circuit may include:
During the sensing interval,
And supplies a reference voltage to the Q data lines before detecting the signals of the Q data lines. The method according to claim 1,
In each pixel region included in the first region,
A switching transistor which is controlled by a gate signal applied to a gate node through a corresponding gate line among the N gate lines and is electrically connected between a corresponding one of the Q data lines and a corresponding pixel electrode;
An optical sensor is disposed where both ends are connected to the source node and the drain node of the switching transistor,
And a light irradiating device for irradiating light with the optical sensor. 17. The method of claim 16,
The fingerprint sensing mode section includes a charging section and a sensing section,
During the charging interval,
The gate driving circuit sequentially supplies a gate signal of a turn-on level voltage to the N gate lines,
Wherein the driving voltage supply circuit supplies the driving voltage to the Q data lines,
During the sensing interval,
The light irradiation device irradiates light to the optical sensor,
The gate driving circuit sequentially supplies a gate signal of a turn-on level voltage to the N gate lines,
The driving voltage supply circuit may not supply the driving voltage to the Q data lines,
Wherein the fingerprint sensing circuit is electrically connected to the Q data lines to detect signals of the Q data lines. The method according to claim 1,
Further comprising a timing control switch circuit for each of the Q data lines,
Wherein the timing control switch circuit comprises:
Whether or not the data line and the driving voltage supply circuit are electrically connected,
Whether or not the data line and the fingerprint sensing circuit are electrically connected,
Controls whether or not the data line and the data driving circuit are electrically connected,
A display device comprising at least one switch element. 19. The method of claim 18,
Wherein the timing control switch circuit comprises:
Operating in accordance with a first control signal and a second control signal,
When the first control signal and the second control signal are at the first level,
The data line is electrically connected to the data driving circuit so that the video data voltage is supplied to the corresponding data line,
When the first control signal is at a second level and the second control signal is at a first level,
And the driving voltage supply circuit is electrically connected to the corresponding data line so that the driving voltage is supplied to the corresponding data line,
When the first control signal is at a first level and the second control signal is at a second level,
And the fingerprint sensing circuit electrically connects the corresponding data line and the fingerprint sensing circuit, thereby controlling the fingerprint sensing circuit to detect the signal of the corresponding data line. 20. The method of claim 19,
Wherein the timing control switch circuit comprises:
When the first control signal is at a second level and the second control signal is at a second level,
And electrically connecting the corresponding data line to the fingerprint sensing circuit, thereby controlling the fingerprint sensing circuit to supply a reference voltage to the corresponding data line. The method according to claim 1,
A plurality of touch electrodes disposed on the display panel,
Further comprising a touch sensing circuit that drives at least one of the plurality of touch electrodes and senses whether or not a touch is made by a finger or a touch object or touch coordinates,
The fingerprint sensing circuit may include:
Sets the first area as a fingerprint detection area in response to occurrence of a fingerprint detection event,
When a finger touch is sensed in the first area set as the fingerprint sensing area by the touch sensing circuit,
And detects the fingerprint information in the first area. 22. The method of claim 21,
A display mode for displaying a normal image and a touch sensing mode for sensing whether a finger or a touch object is touched or touch coordinates are time-shared or concurrently performed until the occurrence of the fingerprint sensing event,
When the fingerprint detection event occurs, the first area is set as the fingerprint detection area, a first fingerprint detection screen is displayed,
Wherein the fingerprint detection circuit detects the fingerprint information in the first area when the touch of the finger is detected in the first area by the touch detection circuit, A display device for displaying a screen for fingerprint detection. K (K is a natural number of 2 or more) data lines; And
H (H is a natural number of 2 or more) gate lines,
A first region including a pixel region defined by N (N is a natural number of 1 or more) gate lines and Q (Q is a natural number of 1 or more) data lines among the K data lines among the H gate lines, Is a fingerprint detection area for detecting a fingerprint,
During the fingerprint sensing mode interval charging period,
A gate signal of a turn-on level voltage is sequentially supplied to the N gate lines,
A driving voltage, which is a voltage different from the video data voltage, is supplied to the Q data lines,
During the sensing period in the fingerprint sensing mode section,
A gate signal of a turn-on level voltage is sequentially supplied to the N gate lines,
And the Q data lines are electrically connected to the fingerprint sensing circuit. And a plurality of pixel regions defined by the K data lines and the H gate lines are arranged in a matrix form in which a plurality of data lines are arranged in a matrix, K (K is a natural number of 2 or more) data lines, H (H is a natural number of 2 or more) A method of driving a display device including a display panel in which pixel electrodes are arranged in each pixel region,
Detecting fingerprint information in an area including a pixel area defined by N (N is a natural number of 1 or more) gate lines of the H gate lines and Q (Q is a natural number of 1 or more) data lines among the K data lines A fingerprint sensing mode starting step of recognizing occurrence of a start event for a fingerprint sensing mode for performing a fingerprint sensing mode;
A charging step of sequentially supplying a gate signal of a turn-on level voltage to the N gate lines and supplying a driving voltage which is a voltage different from the video data voltage to the Q data lines; And
And a sensing step of sequentially supplying a gate signal of a turn-on level voltage to the N gate lines and detecting a signal of the Q data lines. A circuit for fingerprint detection,
A first circuit for supplying a driving voltage to Q (Q is a natural number of 1 or more) data lines among K data lines (K is a natural number of 2 or more) data lines; And
And a second circuit for detecting signals of the Q data lines. 26. The method of claim 25,
The second circuit comprising:
And a reference voltage is supplied to the Q data lines before detecting the signals of the Q data lines. 26. The method of claim 25,
Further comprising a third circuit for supplying a video data voltage to the K data lines. 28. The method of claim 27,
Further comprising a timing control switch circuit for each of the Q data lines,
Wherein the timing control switch circuit comprises:
Whether or not the data line and the first circuit are electrically connected,
Whether or not the data line and the second circuit are electrically connected,
Controls whether the corresponding data line and the third circuit are electrically connected,
A circuit for fingerprint detection comprising one or more switch elements. A display panel in which data lines are arranged, gate lines are arranged, pixel regions defined by the data lines and the gate lines are arranged, and pixel electrodes are arranged in the pixel regions; And
And a fingerprint sensing circuit for sensing fingerprint information by receiving a signal from a data line electrically connected to the pixel electrode through a switching transistor after a driving voltage is applied to the pixel electrode.

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