KR20210057532A - Display device - Google Patents

Abstract

The present invention relates to a display device which comprises: a plurality of gate lines arranged in a first direction; a plurality of common lines arranged in the first direction between the plurality of gate lines; a plurality of data lines arranged in a second direction different from the first direction; a plurality of lead-out lines arranged in the second direction between the plurality of data lines; a plurality of sensing driving lines disposed in the second direction between the plurality of data lines; a plurality of pixels connected to the plurality of gate lines, the plurality of data lines, and the common line; and a plurality of photosensors connected to the plurality of sensing driving lines, the plurality of readout lines, and the common line. According to the present invention, the plurality of common lines can apply the same common voltage to the plurality of pixels and the plurality of photosensors so that lines for driving the photosensors of the display device can be eliminated, thereby increasing the aperture ratio of a display device and simultaneously reducing noise in a common voltage.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device, and more particularly, to a photo sensor type display device.

As the information age enters, the field of displays that visually express electrical information signals has rapidly developed, and in response to this, various display devices with excellent performance of thinner, lighter, and low power consumption have been developed.

Examples of such a display device include a liquid crystal display device (LCD), an organic light emitting display device (OLED), and the like.

Recently, display devices are provided with a touch screen that allows a user to intuitively and conveniently input information or commands by breaking away from the usual input methods such as buttons, keyboards, and mice.

A touch screen is a type of input device that is installed on a display device and inputs predetermined information by pressing a touch sensor in the touch screen while a user looks at the display device.

Touch screens can be classified into an add-on type, an on-cell type, and an in-cell type, depending on their structure. Among them, the display device can be made thinner and improved durability. In this regard, a touch screen integrated display device is widely used.

In the touch screen integrated display device, a photo touch sensor for recognizing a touch according to light intensity with a touch sensor and a capacitance touch sensor for recognizing a touch according to variable capacitance are mainly used.

In particular, the auxiliary common wiring recognizes a touch through a light leakage current of a photo transistor generated from incident light or reflected light by the touch object. At this time, in order to detect sensing, sensing data of X/Y coordinates in the display panel is required. For this, in case of dividing the display and sensing drive through time division, the sensor node in the display panel must be read at a time due to time division, so that one sensor node and one readout wire must be matched 1:1. There are drawbacks. On the other hand, since the photo sensor method in which sensing and display timing are performed at the same time requires sensing when the display is driven, the display signal, that is, the ripple of the common voltage due to the data signal transition is transmitted to the readout wiring. Noise is generated.

The amount of fluctuation of the common voltage generated when driving the display is closely related to the amount of charge in the noise according to the Q=CV formula. That is, the intensity of noise is proportional to the parasitic capacitance applied to the lead-out wiring, and the parasitic capacitance increases rapidly as the inch and resolution increase, causing a problem in sensing. Accordingly, there is a method of increasing the difference between the sensing value and the noise by maximizing the amount of charge of the sensor, but the sensor storage capacitor has a side effect that affects the aperture ratio of the display panel.

An object to be solved by the present invention is to provide a display device of a photo sensor type display device in which sensing and display timing are performed at the same time, while minimizing a decrease in an aperture ratio while minimizing the effect of noise due to a change in a data signal.

Another problem to be solved by the present invention is to provide a display device capable of improving luminance uniformity.

The problems of the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above-described problems, a display device according to an exemplary embodiment of the present invention includes a plurality of gate wirings arranged in a first direction, a plurality of common wirings arranged in a first direction between the plurality of gate wirings, and A plurality of data wires disposed in a second direction different from the one direction, a plurality of readout wires disposed in a second direction between the plurality of data wires, and a plurality of sensing driving wires disposed in the second direction between the plurality of data wires , A plurality of gate wires, a plurality of data wires, a plurality of pixels connected to a common wire, a plurality of sensing driving wires, a plurality of readout wires, and a plurality of photosensors connected to a common wire, wherein the plurality of common wires Since the same common voltage can be applied to a plurality of pixels and a plurality of photosensors, wiring for driving the photosensor of the display device can be eliminated, thereby improving the aperture ratio of the display device and reducing noise of the common voltage. have.

Details of other embodiments are included in the detailed description and drawings.

The present invention is advantageous in securing charging characteristics by simultaneously performing display and touch driving instead of a time-division method by applying a photo sensor method, and is advantageous in cost reduction due to a simple touch circuit structure.

According to the present invention, in a photo sensor type display device, the number of horizontally extending wires can be reduced, thereby improving the aperture ratio of the display device.

According to the present invention, noise of the common voltage can be minimized by using a plurality of pins to supply the common voltage.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a block diagram illustrating a display device according to an exemplary embodiment of the present invention.
2 is an equivalent circuit diagram showing a part of a sensor pixel unit of a display panel according to an exemplary embodiment of the present invention.
3 is a stacked view illustrating a part of a sensor pixel unit of a display panel according to an exemplary embodiment of the present invention.
4 is a diagram for describing wirings disposed in one sensor pixel unit.
5 is a diagram illustrating a connection relationship between a display panel and a touch driving circuit of a display device according to an exemplary embodiment of the present invention.
6 is a diagram illustrating an associative amplifier provided in a touch driving circuit of a display device according to an exemplary embodiment of the present invention.
7 is a waveform diagram illustrating touch sensing driving of a display device according to an exemplary embodiment of the present invention.
8 is a diagram illustrating a connection relationship between a display panel and an integrated driving circuit of a display device according to an exemplary embodiment of the present invention.

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

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

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

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

The fact that a device or layer is referred to as another device or layer on includes all cases in which another layer or other device is interposed directly on or in the middle of another device.

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

The same reference numerals refer to the same elements throughout the specification.

The size and thickness of each component shown in the drawings are illustrated for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated component.

Each of the features of the various embodiments of the present invention may be partially or entirely combined or combined with each other, and as a person skilled in the art can fully understand, technically various interlocking and driving are possible, and each of the embodiments may be independently implemented with respect to each other. It may be possible to do it together in a related relationship

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

<display device>

1 is a block diagram illustrating a display device according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a display device according to an embodiment of the present invention includes a display panel 100, a gate driver 200, a data driver 300, and a timing controller; 400) and a touch driver 500 may be included.

In the display panel 100, a plurality of gate lines GL1 to GLn may be disposed in a first direction, and a plurality of data lines DL1 to DLm may be disposed in a second direction that is different from the first direction.

In addition, a plurality of common wirings CL1 to CLo may be disposed in a first direction between the plurality of gate wirings GL1 to GLn.

In addition, lead-out wirings RO1 to ROq and sensing driving wirings Vdr1 to Vdrs may be disposed between the plurality of data wirings DL1 to DLm in a second direction.

For example, a plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm may cross each other to define a plurality of pixels P.

The plurality of pixels P are electrically connected to gate wirings GL1 to GLn, data wirings DL1 to DLm, and common wirings CL1 to CLo, and gate wirings GL1 to GLn, and data wirings DL1 to DLm. ) And the pixel driving signal or the pixel driving voltage applied through the common wirings CL1 to CLo.

At this time, the display panel 100 according to an embodiment of the present invention has a double rate driving (DRD) structure in which a pair of adjacent pixels P are commonly connected to one data line DL1 to DLm. It can be composed of. However, the present invention is not limited thereto. For reference, in the DRD structure, the number of gate wirings is doubled compared to a general display panel, but instead of doubling the number of data wirings, the number of integrated circuits (ICs) forming the data driving circuit is reduced while reducing This is a method to implement the same resolution.

As described above, the display panel 100 according to an exemplary embodiment of the present invention has a DRD structure, so that the readout wirings RO1 to ROq and sensing are driven using a partial area in which the existing data wirings DL1 to DLm are arranged. By arranging the wirings Vdr1 to Vdrs, a photo sensor PS for detecting a touch without reducing an aperture ratio may be provided as compared to a general display device.

The display panel 100 includes a plurality of pixels P, and may display an image based on a gray scale displayed by each pixel P. In the case of a liquid crystal panel as an example of the display panel 100, each of the plurality of pixels P has a pixel electrode and a common wiring (which are driven by signals applied through the gate lines GL1 to GLn) and the data lines DL1 to DLm. CL1 to CLo) may include a common electrode to which a common voltage is applied. Each of the plurality of pixels P may display an image by tilting the liquid crystal due to a voltage difference between the pixel electrode and the common electrode. However, the present invention is not limited to the liquid crystal panel.

The plurality of pixels P illustrated in FIG. 1 may be sub-pixels displaying different colors, and a plurality of sub-pixels may form a unit to form one pixel. For example, the sub-pixels may display red, green, and blue, or red, green, blue, and white.

A plurality of sensor pixel units 150 may be defined on the display panel 100.

The sensor pixel unit 150 may include a plurality of pixels P and a photo sensor PS. Through the photo sensor PS, a touch may be recognized according to a change in an off current of a sensor transistor that changes according to light intensity. More specifically, the photo sensor PS includes a sensor transistor and a sensor storage capacitor, and the sensor transistor is turned on according to the light intensity to charge a voltage in the sensor storage capacitor. In addition, the charged voltage is output to the readout wirings RO1 to ROq at a preset timing to recognize a touch. The structure of the plurality of sensor pixel units 150 will be described in more detail with reference to drawings to be described later.

The gate driving circuit 200 may sequentially supply gate signals to the gate lines GL1 to GLn of the display panel 100 according to the gate driving control signal GCS transmitted from the timing controller 400. The gate driving circuit 200 may include a shift register and a level shifter.

The gate driving circuit 200 may be disposed independently from the display panel 100, or in the form of a thin film when manufacturing the substrate of the display panel 100 on a non-display area where the pixels P of the display panel 100 are not disposed. It may be embedded in a gate-in-panel (GIP) method.

The data driving circuit 300 generates a sampling signal based on the data driving control signal DCS transmitted from the timing controller 400, latches the image data input from the timing controller 400 according to the sampling signal, and converts it into a data signal. After the change, the data signal may be supplied to the plurality of data lines DL1 to DLm in response to a source output enable (SOE) signal.

The data driving circuit 300 may be connected to the bonding pad of the display panel 100 in a chip-on-glass (COG) method, or may be directly disposed on the display panel 100. In some cases, the display panel It may be integrated and disposed in (100). In addition, the data driving circuit 300 may be disposed in a chip-on-film (COF) method.

Also, the data driving circuit 300 may set a common voltage and supply it to the plurality of common wirings CL1 to CLo. To this end, the data driving circuit 300 may be electrically connected to a plurality of data lines DL1 to DLm and a plurality of common wirings CL1 to CLo through a plurality of pins.

The timing controller 400 may transmit an input image signal RGB received from a host system (not shown) to the data driving circuit 300.

In addition, the timing controller 400 receives timing signals such as a clock signal (DCLK), a horizontal synchronization signal (Hsync), a vertical synchronization signal (Vsync), and a data enable signal (DE) received together with the input video signal (RGB). Using this, a timing control signal for controlling operation timings of the gate driving circuit 200 and the data driving circuit 300 may be generated. The timing controller 400 may generate a control signal GCS of the gate driving circuit 200 and a control signal DCS of the data driving circuit 300 in synchronization with the timing signal.

In addition, the timing controller 400 may generate a touch driving signal for driving the photo sensor PS and transmit it to the touch driving circuit 500. In addition, the timing controller 400 may receive a touch detection signal from the touch driving circuit 500 and calculate touch information.

The touch driving circuit 500 may apply a sensor driving voltage and a common voltage to the photo sensor PS. In addition, the touch driving circuit 500 may receive a touch detection signal transmitted from the photo sensor PS and determine whether a touch has been made.

That is, the touch driving circuit 500 may apply a sensor driving voltage to the sensing driving wirings Vdr1 to Vdrs and receive a touch sensing signal through the readout wirings RO1 to ROq.

To this end, the touch driving circuit 500 may be electrically connected to a plurality of sensing driving wirings Vdr1 to Vdrs and a plurality of readout wirings RO1 to ROq through a plurality of pins.

<pixel unit>

2 is an equivalent circuit diagram showing a part of a sensor pixel unit of a display panel according to an exemplary embodiment of the present invention.

3 is a stacked view illustrating a part of a sensor pixel unit of a display panel according to an exemplary embodiment of the present invention.

4 is a diagram for describing wirings disposed in one sensor pixel unit.

Specifically, FIG. 4 shows an example of one sensor pixel unit composed of a pixel of 18 dots x 6 dots.

2 to 4, the sensor pixel unit 150 of the display panel according to an exemplary embodiment of the present invention detects a plurality of pixels P1 and P2 emitting light and incident light to recognize a touch. It may include at least one pair of photo sensors PS1 and PS2.

In addition, the sensor pixel unit 150 may be provided with gate wirings GL1 to GL12 disposed between the common wirings CL1 to CL18 disposed in the first direction.

In addition, the sensor pixel unit 150 includes data lines DL1 to DL8 disposed in a second direction different from the first direction, auxiliary common wirings AL1 to AL6 disposed between the data lines DL1 to DL8, and sensing driving. The wirings Vdr1 and Vdr2 and the lead-out wiring RO1 may be provided.

On the other hand, each pixel unit 150 includes an opening area for displaying an image by the pixel electrode 118 and the common electrode 108 and the pixel electrode 118 and the common electrode 108 in the opening area without displaying an image. It may be defined to include a non-opening area in which a driving element for driving, for example, the pixel transistor TPx, is disposed.

The pixel electrode 118 and the common electrode 108 may be disposed in the opening area.

The pixel electrode 118 forms an electric field together with the common electrode 108, and the liquid crystal molecules of the liquid crystal layer are tilted by the electric field thus formed to display an image. The pixel electrodes 118 may be disposed side by side at the same interval, and one end of the plurality of pixel electrodes 118 may be connected to the pixel connection electrode 118a disposed in the first direction. The pixel electrode 118 may be disposed not only in the open area but also extended and disposed in the non-open area.

The common electrodes 108 may be disposed side by side at the same interval, and one end of the plurality of common electrodes 108 may be connected to the common connection electrode 108a disposed in the first direction. The common electrode 108 may be alternately disposed with the pixel electrode 118 in the opening area.

Also, the pixel connection electrode 118a and the common connection electrode 108a may be alternately disposed above and below the pixel unit 150.

In addition, the common electrode 108 includes data wirings DL3 and DL4, sensing driving wirings Vdr1 and Vdr2, and data wirings DL3 and DL4 on the auxiliary common wirings AL1 and AL2, and sensing driving wirings Vdr1 and Vdr2. ), and the auxiliary common wirings AL1 and AL2.

Next, in the non-opening region, a plurality of gate wirings GL5 and GL6, a plurality of data wirings DL3 and DL4, a common wiring CL8, auxiliary common wirings AL1 and AL2, and sensing driving wirings Vdr1 and Vdr2 , Readout wiring (RO1), pixel transistor (TPx), sensor transistors (Tss1-1, Tss1-2, Tss2-1, Tss2-2), switch transistors (Tsw1, Tsw2), and sensor storage capacitors (SCst1, SCst2) Can be placed. Details of the constituent elements arranged in the non-opening area will be described later.

Here, the gate wirings GL5 and GL6 are exemplified as being constructed of conventional gate wirings, but the present invention is not limited thereto, and may be formed of wirings different from the existing gate wirings. However, when the gate wirings GL5 and GL6 are configured with a wiring different from the existing gate wiring, an aperture ratio loss may occur. Accordingly, in order to minimize a decrease in the aperture ratio in the first direction of the display device, the gate wirings GL5 and GL6 may be formed of conventional gate wirings.

The auxiliary common wirings AL1, AL2, sensing drive wirings Vdr1, Vdr2, and lead-out wiring RO1 arranged in the second direction as described above are not arranged in separate areas, but are not in the DRD method. Since the display device may be disposed in an area where data wiring is arranged, the display panel according to an exemplary embodiment of the present invention includes auxiliary common wirings AL1 and AL2, sensing driving wirings Vdr1 and Vdr2, and lead-out wiring RO1. There is no need to design a separate wiring area in order to place it. Therefore, it is possible to minimize the decrease in the aperture ratio.

In this case, the plurality of pixels P1 and P2 and the plurality of photo sensors PS1 and PS2 may be disposed between the adjacent gate lines GL5 and GL6 among the plurality of gate lines.

Specifically, a plurality of pixels P1 and P2 and a plurality of photo sensors PS1 and PS2 may be disposed between the fifth gate line GL5 and the sixth gate line GL adjacent to each other.

The plurality of pixels P1 and P2 may be red, green, and blue sub-pixels, respectively.

In addition, the plurality of pixels P1 and P2 may be disposed in a double rate driving (DRD) method. In more detail, among the plurality of pixels P1 and P2, adjacently disposed pixels P1 and P2, for example, as shown in FIG. 2, the first pixel P1 and the second pixel P2 The third data line DL3, which is the same data line, is electrically connected, the first pixel P1 may be connected to the fifth gate line GL5, and the second pixel P2 is the sixth gate line GL6. Can be connected to. In addition, both the first and second pixels P1 and P2 are connected to the eighth common line CL8 to receive a common voltage.

Since it is a DRD structure as described above, as shown in FIG. 3, one common wiring CL1 to CL18 is disposed for every two pixels P1 and P2. Further, in an embodiment of the present invention, the common wiring CL1 is additionally disposed in a second direction different from the first direction, and auxiliary common wirings AL1 to AL6 electrically connected to the common wirings CL1 to CL18 are additionally disposed. To CL18) can be drastically reduced. Accordingly, since the common voltage is applied through the common wirings CL1 to CL18 and the auxiliary common wirings AL1 to AL6, a voltage drop can be minimized. Consequently, uniformity of luminance can be improved by additionally arranging the auxiliary common wirings AL1 to AL6.

Referring to FIG. 2, each of the plurality of pixels P1 and P2 may include a pixel transistor TPx, a pixel capacitor PClc connected in parallel with the pixel transistor TPx, and a pixel storage capacitor PCst.

The pixel transistor TPx may store a data signal applied from the data lines DL1 to DL8 in the pixel capacitor PClc and the pixel storage capacitor PCst in response to a gate signal applied from the corresponding gate lines GL1 to GL12. have.

In this way, the liquid crystal may be driven according to the data signal stored in the pixel capacitor PClc, and the pixel storage capacitor PCst may stably maintain the data signal of the pixel capacitor PClc.

In this case, a case where the display panel 100 according to an exemplary embodiment is a liquid crystal panel has been described as an example, but the present invention is not limited thereto. For example, the display panel 100 according to an embodiment of the present invention may be an organic light-emitting display panel, and in the case of an organic light-emitting display panel, an anode connected to the pixel transistor Px, an emission layer made of an organic material, and a cathode are included. can do.

Meanwhile, the sensing driving wirings Vdr1 and Vdr2 are wirings that transmit a sensor data signal, that is, a sensor driving signal, to the photosensors PS1 and PS2.

Further, the lead-out wiring RO1 is arranged in a second direction between the third data wiring DL3 and the fourth data wiring DL4, and the lead-out wiring RO1 is touched by the photo sensors PS1 and PS2. The detection signal may be transmitted to the touch driving circuit 500. In addition, the readout wiring RO1 may supply the reference voltage Vref to the photosensors PS1 and PS2 in order to initialize the photosensors PS1 and PS2.

The first sensing driving wiring Vdr1 and the second sensing driving wiring Vdr2 may be arranged on the other side of the third data wiring DL3 and the fourth data wiring DL4 in which the readout wiring RO1 is not arranged. have.

In addition, the photo sensors PS1 and PS2 may include a pair of sensor transistors, sensor storage capacitors, and switch transistors. In addition, the photo sensors PS1 and PS2 receive sensor data signals from the sensing driving wirings Vdr1 and Vdr2, detect the incident light, and output a touch detection signal to the readout wiring RO1.

Specifically, the first photo sensor PS1 according to an embodiment of the present invention includes a pair of first sensor transistors Tss1-1 and Tss1-2, a first sensor storage capacitor SCst1, and a first switch transistor. (Tsw1) is included.

In the pair of first sensor transistors Tss1-1 and Tss1-2, a first sensing driving line Vdr1 is connected to a first electrode, and a first sensor storage capacitor SCst1 and a first switch transistor are connected to a second electrode. (Tsw1) is connected, and the eighth common wiring CL8 is connected to the gate electrode.

When a predetermined light is incident on the first photo sensor PS, a photocurrent flows through the pair of first sensor transistors Tss1-1 and Tss1-2 and is turned on. Accordingly, the pair of first sensor transistors Tss1-1 and Tss1-2 may output a first output signal that is a touch detection signal to the first sensor storage capacitor SCst1 and the first switch transistor Tsw1.

The first sensor storage capacitor SCst1 is connected between the eighth common line CL8 and the drains of the pair of first sensor transistors Tss1-1 and Tss1-2.

Accordingly, the first sensor storage capacitor SCst1 may store the first output signal output from the pair of first sensor transistors Tss1-1 and Tss1-2.

In the first switching transistor Tsw1, a pair of first sensor transistors Tss1-1 and Tss1-2 and a first sensor storage capacitor SCst1 are connected to a first electrode, and a readout wiring RO1 is connected to the second electrode. ) Is connected, and the sixth gate line GL6 is connected to the gate electrode.

Accordingly, when the gate voltage applied to the sixth gate line GL6 is at a high level, the first switching transistor Tsw1 is turned on to output the first output signal to the readout line RO1 and at the same time 1 The first electrode of the switching transistor Tsw1 may be initialized to the reference voltage Vref.

In this case, it is illustrated that the pair of first sensor transistors Tss1-1 and Tss1-2 are connected to one first sensor storage capacitor SCst1, but the present invention is not limited thereto.

In addition, the second photo sensor PS2 according to an embodiment of the present invention includes a pair of second sensor transistors Tss2-1 and Tss2-2, a second sensor storage capacitor SCst2, and a second switch transistor ( Tsw2).

In the pair of second sensor transistors Tss2-1 and Tss2-2, a second sensing driving line Vdr2 is connected to a first electrode, and a second sensor storage capacitor SCst2 and a second switch transistor are connected to the second electrode. (Tsw2) is connected, and the eighth common wiring CL8 is connected to the gate electrode.

When a predetermined light is incident on the second photo sensor PS, a photocurrent flows through the pair of second sensor transistors Tss2-1 and Tss2-2 and is turned on. Accordingly, the pair of second sensor transistors Tss2-1 and Tss2-2 may output a second output signal that is a touch detection signal to the second sensor storage capacitor SCst2 and the second switch transistor Tsw2.

The second sensor storage capacitor SCst2 is connected between the eighth common line CL8 and the drains of the pair of second sensor transistors Tss2-1 and Tss2-2.

Accordingly, the second sensor storage capacitor SCst2 may store the second output signal output from the pair of second sensor transistors Tss2-1 and Tss2-2.

In the second switching transistor Tsw2, a pair of second sensor transistors Tss2-1 and Tss2-2 and a second sensor storage capacitor SCst2 are connected to a first electrode, and a readout wiring RO2 is connected to the second electrode. ) Is connected, and the fifth gate line GL5 is connected to the gate electrode.

Accordingly, when the gate voltage applied to the fifth gate line GL5 is at a high level, the second switching transistor Tsw2 is turned on to output the second output signal to the readout line RO2 and at the same time 2 The first electrode of the switching transistor Tsw2 may be initialized to the reference voltage Vref.

In this case, it is illustrated that a pair of second sensor transistors Tss2-1 and Tss2-2 are connected to one second sensor storage capacitor SCst2, but the present invention is not limited thereto.

That is, as an example, in order to be applied to a 65-inch UHD, the sensor storage capacitor needs a capacity of about 1.2pf or more. However, in terms of the aperture ratio, when the capacitor capacity increases by 0.2pf, the aperture ratio decreases by 10% or more. Therefore, it is necessary to maximize the storage capacity while minimizing the decrease in the aperture ratio.

For example, in the case of one of a plurality of sensor transistors (Tss1-1, Tss1-2, Tss2-1, Tss2-2), width/distance (W/L) based on 60 Hz and 1 frame = 16.6 ms = It can be fully charged up to about 0.6pf at the level of 25/4.8㎛.

Accordingly, in the present invention, when the capacitor capacity that one of the first photo sensor PS1 and the second photo sensor PS2 can handle is 0.6 pf level, one sensing is performed to secure the aforementioned 1.2 pf capacitor capacity. Charges stored in the first photo sensor PS1 and the second photo sensor PS2 are added and transferred to the readout wiring RO1 during timing. Accordingly, the present invention can maximize the storage capacity while minimizing the decrease in the aperture ratio.

That is, in the present invention, two gate wires, for example, the sixth gate wire GL6 and the fifth gate wire GL5 are connected to the first photo sensor PS1 and the second photo sensor PS2, respectively, The capacitor capacity of each of the first photo sensor PS1 and the second photo sensor PS2 is designed by about 0.6pf, and a pair of first sensors is provided for each of the first photo sensor PS1 and the second photo sensor PS2. The transistors Tss1-1 and Tss1-2 and a pair of second sensor transistors Tss2-1 and Tss2-2 are disposed.

Meanwhile, in consideration of the wavelength range of the light source, the pair of first sensor transistors Tss1-1 and Tss1-2 according to the present invention includes a first red sensor transistor Tss1-1 reacting from a red light source. It may be composed of a first green sensor transistor Tss1-2 that reacts from a green light source.

In addition, the pair of second sensor transistors Tss2-1 and Tss2-2 may include a second red sensor transistor Tss2-1 reacting from a red light source and a second green sensor transistor Tss2-2 reacting from a green light source. It can be composed of. However, the present invention is not limited thereto.

In this case, in the present invention, the first red sensor transistor Tss1-1 and the first green sensor transistor Tss1-2 are connected to the same first sensing driving line Vdr1, and the second red sensor transistor Tss2-1 ) And the second green sensor transistor Tss2-2 are connected to the same second sensing driving line Vdr2. In this case, the number of lead-out wirings RO1 can be reduced by 50%, and thus the number of integrated circuits can be reduced, thereby reducing cost. In addition, the present invention can minimize noise by adding auxiliary common wirings AL1 to AL6 instead of the reduced lead-out wiring RO1.

As described above, in an embodiment of the present invention, in a photo sensor type display device in which sensing and display timing proceed simultaneously, photo sensors PS1 and PS2 are provided on both sides of the readout wiring RO1. Thus, it is characterized in that the electric charges stored in the two photo sensors PS1 and PS2 are transferred to the readout wiring RO1 during one sensing timing. As described above, an embodiment of the present invention is advantageous in securing charging characteristics by simultaneously performing display and touch driving instead of a time-division method by applying a photo sensor method, and is advantageous in cost reduction due to a simple touch circuit structure. .

In addition, as described above, in an embodiment of the present invention, the photosensors PS1 and PS2 and the pixels P1 and P2 may share one common wiring CL8.

Specifically, one common wiring CL8 is connected to the plurality of sensor transistors Tss1-1, Tss1-2, Tss2-1, Tss2-2 and the pixel transistor TPx, and the photo sensors PS1 and PS2 and The same common voltage may be applied to the pixels P1 and P2.

In this regard, each of the plurality of sensor transistors Tss1-1, Tss1-2, Tss2-1, and Tss2-2 must be turned off until light is incident from the outside. The voltage difference between the second electrode and the gate electrode of each of the plurality of sensor transistors (Tss1-1, Tss1-2, Tss2-1, Tss2-2) is the plurality of sensor transistors (Tss1-1, Tss1-2, Tss2-1). , Tss2-2) must be below the threshold voltage.

That is, a constant common voltage is applied to the gate electrodes of each of the plurality of sensor transistors Tss1-1, Tss1-2, Tss2-1, and Tss2-2 through the common wiring CL8, and the plurality of sensor transistors Tss1-1 , Tss1-2, Tss2-1, Tss2-2) When the gate voltage is at a high level, the reference voltage Vref is applied from the readout wiring RO1 to each of the second electrodes.

The difference between the reference voltage Vref and the common voltage may be set to be less than or equal to the threshold voltages of the sensor transistors Tss1-1, Tss1-2, Tss2-1, and Tss2-2. Accordingly, each of the plurality of sensor transistors (Tss1-1, Tss1-2, Tss2-1, Tss2-2) may be turned off until light is incident from the outside, so that the photo sensors PS1 and PS2 are photo-sensing. The function can be performed smoothly.

In addition, in an embodiment of the present invention, the first sensor storage capacitor SCst1 and the second sensor storage capacitor SCst2 may also be connected to the above-described common wiring CL8.

In a conventional display device, a sensor storage capacitor is not connected to a common wire, but is connected to a storage wire formed separately from a common wire to store a touch sensing signal. Since the above-described separate storage wiring is also formed of opaque metal, there is a problem in that the aperture ratio is reduced due to the formation of the separate storage wiring.

However, in the display device according to an exemplary embodiment of the present invention, the storage wiring previously formed separately is deleted, and the first sensor storage capacitor SCst1 and the second sensor storage capacitor SCst2 are also the above-described common wiring CL8. By connecting to, it is possible to store a touch detection signal.

Accordingly, in the display device according to an exemplary embodiment of the present invention, the number of wires may be reduced, and thus an aperture ratio may be improved. Specifically, the number of horizontally extending wires can be reduced by about 40%, which has the effect of improving the aperture ratio of the entire display device by 10%.

<Touch drive circuit>

5 is a diagram illustrating a connection relationship between a display panel and a touch driving circuit of a display device according to an exemplary embodiment of the present invention.

As described above with reference to FIG. 1, the touch driving circuit 500 may apply a sensor driving voltage and a common voltage to the photo sensor PS. In addition, the touch driving circuit 500 may receive a touch detection signal transmitted from the photo sensor PS and determine whether a touch has been made.

That is, the touch driving circuit 500 applies a sensor driving voltage to the sensing driving wirings Vdr1 to Vdrs, applies a common voltage to the plurality of common wirings CL1 to CLo, and connects the readout wirings RO1 to ROq. Through the touch detection signal can be received.

To this end, the touch driving circuit 500 is electrically connected to a plurality of common wirings CL1 to CLo, a plurality of sensing driving wirings Vdr1 to Vdrs, and a plurality of readout wirings RO1 to ROq through a plurality of pins. Can be connected.

Specifically, as shown in FIG. 4, the touch driving circuit 500 may include a plurality of pins (PN1 to PNx, x is a natural number), and each of the plurality of pins PN1 to PNx is a plurality of common wirings. It may be electrically connected to (CL1 to CLo), a plurality of sensing driving wirings Vdr1 to Vdrs, and a plurality of lead-out wirings RO1 to ROq.

The first pin PN1 and the second pin PN2 are connected to a plurality of common wirings CL1 to CLo, and the touch driving circuit 500 is through the first pin PN1 and the second pin PN2, A common voltage may be applied to the plurality of common wirings CL1 to CLo.

In addition, the third pin PN3 is connected to the plurality of sensing driving wires Vdr1 to Vdrs, and the touch driving circuit 500 is connected to the plurality of sensing driving wires Vdr1 to Vdrs through the third pin PN3. Sensor driving voltage can be applied.

In addition, the fourth pin PN4 is connected to the first lead-out wire RO1, and the touch driving circuit 500 is a photo sensor connected to the first read-out wire RO1 through the fourth pin PN4. A touch detection signal may be input from (PS).

In addition, the fifth pin PN5 is connected to the second lead-out wire RO2, and the touch driving circuit 500 is a photo sensor connected to the second read-out wire RO2 through the fifth pin PN5. A touch detection signal may be input from (PS).

In addition, the (x-1)th pin PN(x-1) is connected to the (q-1)th readout wiring RO(q-1), and the touch driving circuit 500 is connected to the (x-th) 1) A touch detection signal may be input from the photo sensor PS connected to the (q-1)th readout line RO(q-1) through the pin PN(x-1).

In addition, the x-th pin PNx is connected to the q-th readout line ROq, and the touch driving circuit 500 is a photo sensor connected to the q-th readout line ROq through the x-th pin PNx. A touch detection signal may be input from (PS).

As described above, the touch driving circuit 500 of the display device according to the exemplary embodiment may include at least two pins PN1 and PN2 connected to the plurality of common wirings CL1 to CLo.

A conventional display device separately required a pin for electrically connecting the sensor storage wiring and the touch driving circuit.

However, in the display device according to an exemplary embodiment of the present invention, pins for electrically connecting the sensor storage wiring and the touch driving circuit are connected to a plurality of common wirings CL1 to CLo by deleting the storage wiring that was previously separately formed. ) Can be connected.

Accordingly, the display device according to the exemplary embodiment may connect at least two pins of the touch driving circuit to the plurality of common wirings CL1 to CLo. Accordingly, a common voltage is applied to the common wirings CL1 to CLo through at least two pins, so that the common voltage can be stably applied. That is, the common voltage supplied to the display device according to the exemplary embodiment of the present invention minimizes a voltage drop and a delay due to a resistance, so that driving stability of the display device may be improved.

6 is a diagram illustrating an associative amplifier provided in a touch driving circuit of a display device according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the touch driving circuit 500 includes an operational amplifier for processing a touch sensing signal applied through a plurality of readout wirings RO1 to ROq. For reference, a typical operational amplifier refers to a high-gain amplifier for an analog computer, and in an analog computer, it has a large gain, a high input impedance, and an output so that the gain can be determined only by the characteristics of the passive element used in the feedback circuit. A low-impedance amplifier is required. This amplifier was then supposed to be widely used as a standard integrated circuit (IC) for analog amplifiers. The operational amplifier as a standard IC is a differential input type and has a gain of 30~100dB, and a negative feedback is applied to it to obtain an amplification circuit with an appropriate gain. The input/output characteristics of the circuit are determined as the ratio of the impedance connected to the input of the operational amplifier and the impedance connected to the feedback circuit.

In the process of processing the touch sensing signal, the current sensed through the readout line RO1 is amplified and detected by an operational amplifier.

As shown in FIG. 6, in relation to the associative amplifier, the readout wiring RO1 is connected to the (-) input terminal, and the reference voltage Vref may be applied to the (+) input terminal. In addition, the voltage output from the output terminal is an amplified value of the touch sensing voltage value, which is a sensed touch sensing signal. Here, a feedback capacitor Cfb may be formed between the (-) input terminal and the output terminal. However, the present invention is not limited thereto.

<Touch detection drive>

7 is a waveform diagram illustrating touch sensing driving of a display device according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the timing of the sensor is that charge moves to each of the plurality of readout wires RO1 to ROq while the gate high voltage is applied to the two gate wires GATE; Nth and N+1th. It is done.

The two gate lines GATE (Nth and N+1th) described above may correspond to the fifth gate line GL5 and the sixth gate line GL6 of FIG. 2.

At this time, a gate high voltage is applied to the N-th gate line (GATE; Nth) for a predetermined horizontal period (Ph), and then the gate high to the N+1-th gate line (GATE; N+1th) for a predetermined horizontal period (Ph). Voltage is applied sequentially.

In FIG. 7, a period in which the gate high voltage is applied to the Nth gate line (GATE; Nth) and the period in which the gate high voltage is applied to the N+1th gate line (GATE; N+1th) are partially overlapped, but are limited thereto. The period in which the gate high voltage is applied to the N-th gate line (GATE; Nth) and the period in which the gate-high voltage is applied to the N+1th gate line (GATE; N+1th) do not overlap depending on the need for driving. May not.

While the first horizontal reference signal SH0 is at a high level, the reference voltage Vref of each of the plurality of readout lines RO1 to ROq is measured, and then gates are applied to the two gate lines GATE; Nth and N+1th. The high voltage is sequentially applied.

While the second horizontal reference signal SH1 is at a high level, the touch driving circuit 500 measures the touch sensing voltage by the amount of electric charge accumulated in the sensor storage capacitors SCst1 and SCst2, and compares it with the reference voltage Vref. .

Specifically, when the second switch transistor Tsw2 connected to the N-th gate line GATE (Nth) is turned on, the charge stored in the second sensor storage capacitor SCst2 is transferred to the second switch transistor Tsw2. ) Is moved to the first lead-out wiring RO1.

Thereafter, when the first switch transistor Tsw1 connected to the N+1th gate line GATE; N+1th is turned on, the electric charge stored in the first sensor storage capacitor SCst1 passes through the first switch transistor Tsw1. Through this, it moves to the same first lead-out wiring RO1. Thereafter, after the first switch transistor Tsw1 and the second switch transistor Tsw2 are turned off, the touch driving circuit 500 performs a first operation while the second horizontal reference signal SH1 is at a high level. A touch sensing signal, which is an amount of electric charge, is sensed by the readout wiring RO1.

Conventionally, a ripple of a common voltage due to a transition of a data signal may cause a voltage fluctuation in a readout wiring due to a parasitic capacitor capacitance, thereby generating noise. This leads to deterioration of touch sensor characteristics, and a margin of voltage level for the touch sensor is reduced. That is, for example, when the noise value has a larger value than the touch detection signal, it is impossible to distinguish whether the output voltage detected through the operational amplifier is a noise value or a sensing voltage, so that the accuracy of sensing is degraded.

In order to improve this, the present invention includes photo sensors PS1 and PS2 on both sides of the lead-out wiring RO1 to transfer electric charges stored in the two photo sensors PS1 and PS2 during one sensing timing to the read-out wiring RO1. Will be delivered to.

Accordingly, an embodiment of the present invention is advantageous in increasing the inch and resolution of the display panel by minimizing the effect of noise due to the change in the data signal, and can be applied to a double rate driving (DRD) structure, thereby minimizing the decrease in transmittance. have.

<Other of the present invention Example >

Hereinafter, a display device according to another exemplary embodiment of the present invention will be described.

In the other embodiment of the present invention, compared to the embodiment of the present invention, the touch driving circuit and the data driving circuit of the display device of the present invention are integrated into an integrated driving circuit, so that only the connection relationship between a plurality of pins and wiring is This is different. Accordingly, descriptions of overlapping portions of another embodiment of the present invention and an embodiment of the present invention will be omitted, and a connection relationship between the integrated driving circuit and the wiring will be described in detail.

8 is a diagram illustrating a connection relationship between a display panel and an integrated driving circuit of a display device according to an exemplary embodiment of the present invention.

The integrated driving circuit 700 may apply a sensor driving voltage to the sensing driving wirings Vdr1 to Vdrs and receive a touch sensing signal through the readout wirings RO1 to ROq, as well as a plurality of data wirings DL1. To DLm).

To this end, the integrated driving circuit 700 includes a plurality of common wirings CL1 to CLo, a plurality of sensing driving wirings Vdr1 to Vdrs, and a plurality of readout wirings RO1 to PNy through a plurality of pins PN1 to PNy. ROq) and the plurality of data lines DL1 to DLm may be electrically connected.

Specifically, as shown in Figure 8, the integrated driving circuit 700 may include a plurality of pins (PN1 to PNy, y is a natural number), each of the plurality of pins (PN1 to PNy) is a plurality of common wiring It may be electrically connected to (CL1 to CLo), a plurality of sensing driving wires (Vdr1 to Vdrs), a plurality of lead-out wires (RO1 to ROq), and a plurality of data wires (DL1 to DLm).

The first pin PN1 and the second pin PN2 are connected to a plurality of common wirings CL1 to CLo, and the integrated driving circuit 700 is provided through the first pin PN1 and the second pin PN2, A common voltage may be applied to the plurality of common wirings CL1 to CLo.

In addition, the third pin PN 3 is connected to a plurality of sensing driving wirings Vdr1 to Vdrs, and the integrated driving circuit 700 is connected to a plurality of sensing driving wirings Vdr1 to Vdrs through the third pin PN3. The sensor driving voltage can be applied to.

In addition, the fourth pin PN4 is connected to the third data line DL3, and the integrated driving circuit 700 can apply a data signal to the third data line DL3 through the fourth pin PN4. have.

In addition, the fifth pin PN5 is connected to the first lead-out wire RO1, and the integrated driving circuit 700 is a photo sensor connected to the first read-out wire RO1 through the fifth pin PN5. A touch detection signal may be input from (PS).

In addition, the sixth pin PN6 is connected to the fourth data line DL4, and the integrated driving circuit 700 can apply a data signal to the fourth data line DL4 through the sixth pin PN6. have.

In addition, the seventh pin PN7 is connected to the second lead-out wire RO2, and the integrated driving circuit 700 is a photo sensor connected to the second read-out wire RO2 through the seventh pin PN7. A touch detection signal may be input from (PS).

Further, the (y-3)th pin PN(y-3) is connected to the (q-1)th readout wiring RO(q-1), and the integrated driving circuit 700 is the (y-th) 3) A touch detection signal may be input from the photo sensor PS connected to the (q-1)th readout line RO(q-1) through the pin PN(y-3).

Further, the (y-2)th pin PN(y-2) is connected to the (m-1)th data line DL(m-1), and the integrated driving circuit 700 is the (y-2)th ) A data signal may be applied to the (m-1)th data line DL(m-1) through the pin PN(y-2).

In addition, the (y-1)th pin PN(y-1) is connected to the qth readout line ROq, and the integrated driving circuit 700 is the (y-1)th pin PN(y-1). )), a touch sensing signal may be input from the photo sensor PS connected to the q-th readout line ROq.

In addition, the y-th pin PNy is connected to the m-th data line DLm, and the integrated driving circuit 700 may apply a data signal to the m-th data line DLm through the y-th pin PNy. have.

That is, in the display device according to another exemplary embodiment of the present invention, a data line and a readout line may be alternately connected to a plurality of pins included in the integrated driving circuit.

Accordingly, in the display device according to another exemplary embodiment of the present invention, since the integrated driving circuit performs both functions of supplying a data signal and sensing a touch, the display device can be integrated.

An exemplary embodiment of the present invention can be described as follows.

In order to solve the above-described problems, a display device according to an exemplary embodiment of the present invention includes a plurality of gate wirings arranged in a first direction, a plurality of common wirings arranged in a first direction between the plurality of gate wirings, and A plurality of data wires disposed in a second direction different from the one direction, a plurality of readout wires disposed in a second direction between the plurality of data wires, and a plurality of sensing driving wires disposed in the second direction between the plurality of data wires , A plurality of gate wires, a plurality of data wires, a plurality of pixels connected to a common wire, a plurality of sensing driving wires, a plurality of readout wires, and a plurality of photosensors connected to a common wire, and the plurality of common wires The same common voltage may be applied to a plurality of pixels and a plurality of photosensors.

According to another feature of the present invention, a plurality of pixels and a plurality of photosensors may be disposed between adjacent gate wirings among the plurality of gate wirings.

According to another feature of the present invention, the plurality of photo sensors may include a first photo sensor and a second photo sensor, and the first photo sensor and the second photo sensor may be disposed on both sides of each of the plurality of readout wires. .

According to another feature of the present invention, the first photo sensor is connected to the first sensing driving wire among the plurality of sensing driving wires, and in the first sensor transistor and the first sensor transistor for generating a first output signal in response to a light source. A first sensor storage capacitor for storing the output first output signal, and a first switch transistor for outputting a first output signal stored in the first sensor storage capacitor to any one of a plurality of readout wirings in response to the gate signal. have.

According to another feature of the present invention, the gate electrode of the first sensor transistor may be connected to a first common wire among a plurality of common wires, and one electrode of the first sensor storage capacitor may be connected to the first common wire.

According to another feature of the present invention, the first sensor transistor may include a first red sensor transistor responsive to a red light source and a first green sensor transistor responsive to a green light source.

According to another feature of the present invention, the second photo sensor is connected to the second sensing driving wire among the plurality of sensing driving wires, and in the second sensor transistor and the second sensor transistor generating a second output signal in response to the light source. A second sensor storage capacitor for storing the output second output signal and a second switch transistor for outputting a second output signal stored in the second sensor storage capacitor to any one of the plurality of readout wirings in response to the gate signal. have.

According to another feature of the present invention, the gate electrode of the second sensor transistor may be connected to a first common wire among a plurality of common wires, and one electrode of the second sensor storage capacitor may be connected to the first common wire.

According to another feature of the present invention, the second sensor transistor may include a second red sensor transistor responsive to a red light source and a second green sensor transistor responsive to a green light source.

According to another feature of the present invention, a reference voltage is applied to each of the plurality of readout wires, a common voltage is applied to each of the plurality of common wires, and a constant voltage difference between the reference voltage and the common voltage may be maintained.

According to another feature of the present invention, the display device may further include a plurality of auxiliary common wirings disposed in the second direction between the plurality of data wirings and electrically connected to the plurality of common wirings.

According to another feature of the present invention, the display device further includes a touch driving circuit for supplying a common voltage to each of the plurality of common wires, and the touch driving circuit may include at least two pins connected to the plurality of common wires. have.

According to another feature of the present invention, further comprising an integrated driving circuit for supplying a common voltage to the common wiring, and supplying a data signal to the data wiring, the integrated driving circuit may include at least two pins connected to the common wiring. I can.

According to another feature of the present invention, a plurality of data wires and a plurality of readout wires may be alternately connected to a plurality of pins included in the integrated driving circuit.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made without departing from the spirit of the present invention. . Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: display panel
200: gate driving circuit
300: data driving circuit
400: timing controller
500: touch drive circuit
700: integrated drive circuit
AL1 to AL6: auxiliary common wiring
CL1 to CL18: common wiring
DL1 to DL8: data wiring
GL1 to GL12: gate wiring
PS1: first photo sensor
PS2: 2nd photo sensor
RO1: lead-out wiring
SCst1: first sensor storage capacitor
SCst2: second sensor storage capacitor
Tss1-1, Tss1-2: first sensor transistor
Tss2-1, Tss2-2: second sensor transistor
Tsw1: first switch transistor
Tsw2: second switch transistor
Vdr1, Vdr2: sensing drive wiring

Claims (16)

A plurality of gate wirings disposed in the first direction;
A plurality of common wirings disposed in the first direction between the plurality of gate wirings;
A plurality of data lines disposed in a second direction different from the first direction;
A plurality of lead-out wires disposed in the second direction between the plurality of data wires;
A plurality of sensing driving wires disposed in the second direction between the plurality of data wires;
A plurality of pixels connected to the plurality of gate wires, the plurality of data wires, and the common wire, and
And a plurality of photo sensors connected to the plurality of sensing driving wires, the plurality of readout wires, and the common wire,
The plurality of common wirings apply the same common voltage to the plurality of pixels and the plurality of photosensors.
The method of claim 1,
The plurality of pixels and the plurality of photosensors are disposed between adjacent gate wires among the plurality of gate wires. The method of claim 1,
The plurality of photosensors include a first photosensor and a second photosensor,
The first photo sensor and the second photo sensor are disposed on both sides of each of the plurality of readout wires.
The method of claim 3,
The first photosensor,
A first sensor transistor connected to a first sensing driving wire among the plurality of sensing driving wires and generating a first output signal in response to a light source;
A first sensor storage capacitor for storing the first output signal output from the first sensor transistor; And
And a first switch transistor configured to output the first output signal stored in the first sensor storage capacitor to any one of the plurality of readout wirings in response to a gate signal.
The method of claim 4,
The gate electrode of the first sensor transistor is connected to a first common wiring among the plurality of common wirings,
One electrode of the first sensor storage capacitor is connected to the first common wiring.
The method of claim 4,
The first sensor transistor includes a first red sensor transistor responsive to a red light source and a first green sensor transistor responsive to a green light source.
The method of claim 3,
The second photo sensor,
A second sensor transistor connected to the second sensing driving wire among the plurality of sensing driving wires and generating a second output signal in response to a light source;
A second sensor storage capacitor for storing the second output signal output from the second sensor transistor; And
And a second switch transistor configured to output the second output signal stored in the second sensor storage capacitor to any one of the plurality of readout wirings in response to a gate signal.
The method of claim 7,
A gate electrode of the second sensor transistor is connected to a first common wiring among the plurality of common wirings,
One electrode of the second sensor storage capacitor is connected to the first common wiring.
The method of claim 7,
The second sensor transistor includes a second red sensor transistor responsive to a red light source and a second green sensor transistor responsive to a green light source.
The method of claim 1,
A reference voltage is applied to each of the plurality of readout wirings,
A common voltage is applied to each of the plurality of common wirings,
The display device, wherein a constant voltage difference is maintained between the reference voltage and the common voltage.
The method of claim 10,
The display device, wherein a difference between the reference voltage and the common voltage is less than or equal to a threshold voltage of a sensor transistor included in a plurality of photosensors.
The method of claim 3,
The first photo sensor and the second photo sensor,
A display device having a point symmetric structure around each of the lead-out wirings.
The method of claim 1,
The display device further comprising: a plurality of auxiliary common wires disposed between the plurality of data wires in the second direction and electrically connected to the plurality of common wires.
The method of claim 1,
Further comprising a touch driving circuit for supplying a common voltage to each of the plurality of common wiring,
The touch driving circuit includes at least two pins connected to the plurality of common wirings.
The method of claim 1,
Supplying a common voltage to the common wiring,
Further comprising an integrated driving circuit for supplying a data signal to the data line,
The integrated driving circuit includes at least two pins connected to the common wiring.
The method of claim 15,
The plurality of data wires and the plurality of readout wires are alternately connected to the plurality of pins included in the integrated driving circuit.

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