KR102670235B1 - Drive integrated circuit and display device using the same - Google Patents

Abstract

The present invention relates to a drive IC and a display device using the same, which includes a display driver that generates a display signal, a touch sensor driver that generates a touch sensor signal, and a device where the display signal and the touch sensor signal are output alternately. Contains one or more common output terminals.

Description

Drive IC and display device using it {DRIVE INTEGRATED CIRCUIT AND DISPLAY DEVICE USING THE SAME}

The present invention relates to a drive IC that outputs a display signal and a touch signal and a display device using the same.

The User Interface (UI) enables communication between people (users) and various electrical and electronic devices, allowing users to easily control the devices as they wish. Representative examples of user interfaces include keypad, keyboard, mouse, On Screen Display (OSD), and remote controller with infrared or radio frequency (RF) communication functions. User interface technology continues to develop in a direction that increases user sensitivity and convenience of operation. Recently, user interfaces have been developed into touch UI, voice recognition UI, 3D UI, etc.

Touch UI implements a touch screen on a display panel to detect touch input and transmit user input to an electronic device. Touch UI is essential for portable information devices such as smart phones, and is being widely applied to laptop computers, computer monitors, and home appliances.

Technology for implementing a touch screen using technology for embedding touch sensors in a pixel array of a display panel is being applied to various display devices. Touch sensors can be implemented as capacitive type touch sensors that sense a touch based on changes in capacitance before and after the touch.

Because touch sensors are built into the pixel array of the display panel, the touch sensors are coupled to the pixels through parasitic capacitance. In order to reduce the mutual influence caused by the coupling of pixels and touch sensors, in-cell touch sensor technology divides one frame period into a display section and a touch sensing section and divides the driving time of the pixels and the driving time of the touch sensors by time.

The driver of the display device is a data driver that supplies the data signal of the input image to the pixels to the data lines of the display panel during the display period, and a gate driver that supplies a gate signal (or scan pulse) synchronized to the data signal during the display period ( or scan driver), and a touch sensor driver that drives the touch sensors during the touch sensing period.

The data driver and the touch sensor driver may be integrated into one drive IC (integrated circuit). These drive ICs become larger in size because they include terminals that output data signals of input images and terminals that output touch sensor signals. Terminals of the drive IC may be bonded to the bezel area of the display panel using a COG (chip on glass) process and electrically connected to pads on the display panel. Therefore, the cost of these drive ICs increases due to an increase in the number of terminals, and the bezel size of the display panel increases. As the number of touch sensors increases or the resolution of the display panel increases, the number of drive IC terminals increases.

Therefore, the present invention provides a drive IC and a display device using the same that can reduce the size and cost of the drive IC and reduce the bezel of the display panel.

The drive IC of the present invention includes a display driver that generates a display signal, a touch sensor driver that generates a touch sensor signal, and one or more common output terminals through which the display signal and the touch sensor signal are output alternately. The display signal includes a gate signal to be applied to the gate line of the display panel.

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A first switch element connected between the display driver and the common output terminal to supply the gate signal to the common output terminal, and a first switch element connected between the touch sensor driver and the common output terminal to output the touch sensor signal to the common output terminal. It further includes a second switch element supplied to the terminal. The first and second switch elements are alternately turned on.

One frame period is divided into one or more display sections and one or more touch sensing sections. The first switch element is turned on in the display period in response to a display enable signal. The second switch element is turned on in the touch sensing period in response to the touch enable signal.

The drive IC further includes at least one of a data signal output terminal from which only the data signal is output, a touch sensor signal output terminal from which only the touch sensor signal is output, and a gate signal output terminal from which only the gate signal is output.

The display device of the present invention includes the drive IC.

The drive IC of the present invention and the display device using the same alternately output a display signal for driving pixels and a touch sensor signal for driving touch sensors through one common output terminal (bump), thereby reducing the size and cost of the drive IC. You can reduce the bezel size of the display panel.

1 and 2 are diagrams showing input/output terminals of a drive IC according to an embodiment of the present invention.
Figure 3 is a diagram schematically showing a display device according to a first embodiment of the present invention.
FIG. 4 is a diagram showing an example in which the screen of a display device is divided into multiple blocks and driven.
Figure 5 is a diagram showing a touch sensor driver, sensor lines, and touch sensor electrodes.
Figures 6 and 7 are waveform diagrams showing a method of driving the pixels and touch sensors of the display panel.
Figure 8 is a diagram showing the common link wiring in detail.
Figure 9 is a diagram showing the drive IC and touch sensors.
Figure 10 is a diagram showing bumps disposed on the bottom of the drive IC.
FIG. 11 is a circuit diagram showing the drive IC and display panel shown in FIG. 3 in detail.
FIG. 12 is a diagram showing the signal flow between the drive IC shown in FIG. 3 and the display panel during the touch sensing section.
FIG. 13 is a diagram showing the signal flow between the drive IC shown in FIG. 3 and the display panel during the display period.
Figure 14 is a diagram schematically showing a display device according to a second embodiment of the present invention.
FIG. 15 is a diagram showing a link area between output terminals of the drive IC shown in FIG. 14 and display signal lines.
FIG. 16 is a diagram showing bumps disposed on the bottom of the drive IC shown in FIG. 15.
FIG. 17 is a plan view showing in detail display signal lines and sensor signal lines in the display panel shown in FIG. 15.
FIG. 18 is a circuit diagram showing the drive IC and display panel shown in FIG. 15 in detail.
FIG. 19 is a waveform diagram showing the output signal of the drive IC shown in FIG. 15.
FIG. 20 is a diagram showing the signal flow between the drive IC shown in FIG. 15 and the display panel during the touch sensing section.
FIG. 21 is a diagram showing the signal flow between the drive IC shown in FIG. 15 and the display panel during the display period.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. The present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms. The embodiments only serve to ensure that the disclosure of the present invention is complete, and those skilled in the art will be able to understand the present invention. It is provided to completely inform the scope of the invention, and the invention is only defined by the scope of the claims.

The shape, size, ratio, angle, number, etc. shown in the drawings for explaining embodiments of the present invention are illustrative, and the present invention is not limited to the matters shown in the drawings. Like reference numerals refer to substantially like elements throughout the specification. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

When “comprises,” “includes,” “has,” “consists of,” etc. mentioned in the specification are used, other parts may be added unless ‘only’ is used. If a component is expressed in the singular, it may be interpreted as plural unless specifically stated.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship between two components is described as 'on top', 'on top', 'on the bottom', 'next to ~', etc., ' One or more other components may be interposed between those components where 'immediately' or 'directly' is not used.

First, second, etc. may be used to distinguish components, but the function or structure of these components is not limited by the ordinal number or component name in front of the component.

The drive IC of the present invention outputs a display signal and a touch sensor signal for driving pixels. The display signal is a signal for writing pixel data of the input image. The display signal includes at least one of a data signal and a gate signal. The data signal is a pixel data signal applied to the data lines of the display panel. The gate signal is synchronized with the data signal and applied to the gate lines of the display panel. The touch sensor signal is a signal for driving the touch sensor. A touch input can be sensed when a touch sensor signal is applied to the touch sensor.

The drive IC can be implemented as an integrated circuit (IC). The terminals of the drive IC can be interpreted as bumps or pins depending on the type of IC.

The following embodiments can be partially or fully combined or combined with each other, and various technological interconnections and drives are possible. Each embodiment may be implemented independently of each other or may be implemented together in a related relationship.

The display device of the present invention can be implemented as a flat panel display device such as a liquid crystal display (LCD) or an organic light emitting diode display (OLED display). In the following embodiments, the description will focus on a liquid crystal display device as an example of a flat panel display device, but the present invention is not limited thereto. For example, the present invention can be applied to any display device in which touch sensors and pixels are time-divisively driven.

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

1 and 2 are diagrams showing input/output terminals of a drive IC according to an embodiment of the present invention.

Referring to FIG. 1, the drive IC (IC) of the present invention includes a plurality of input terminals 10 and a plurality of output terminals 11, 12, and 13.

Pixel data of the input image, a control signal for controlling the drive IC, a power signal, etc. may be input to the input terminals 10. The control signal may include a data control signal for controlling a pixel data output channel, a sensor control signal for controlling a touch sensor channel, etc.

The output terminals 11, 12, and 13 may include one or more data signal output terminals 11, one or more touch sensor signal output terminals 12, and a common output terminal 13. The common output terminal 13 outputs a data signal and a touch sensor signal in time division.

The output terminals 11, 12, and 13 of the drive IC (IC) may be modified in various ways depending on the signal wiring arrangement of the display panel. The output terminal of the drive IC (IC) may consist of only the common output terminal 13. In cases where the number of data signal channels is greater than the number of touch sensor signal channels, the output terminal of the drive IC (IC) may be composed of a common output terminal 13 and a data signal output terminal 11 without the touch sensor signal terminal 12. there is. In the case where the number of touch sensor signal channels is greater than the number of data signal channels, the output terminal of the drive IC (IC) may be composed of a common output terminal 13 and a touch sensor signal output terminal 12 without a data signal output terminal 11. You can.

Referring to FIG. 2, the drive IC (IC) of the present invention includes a plurality of input terminals 10 and a plurality of output terminals 11, 12, 13, and 14.

Pixel data of the input image, a control signal for controlling the drive IC, a power signal, etc. may be input to the input terminals 10. The control signal may include a data control signal for controlling the pixel data output channel, a gate control signal for controlling the gate signal channel, and a sensor control signal for controlling the touch sensor channel.

The output terminals 11, 12, 13, and 14 include one or more data signal output terminals 11, one or more gate signal output terminals 14, one or more touch sensor signal output terminals 12, and a common output terminal 13. ) may include. The common output terminal 13 includes at least one of a first common output terminal through which a data signal and a touch sensor signal are output in a time division, and a second common output terminal through which a gate signal and a touch sensor signal are output in a time division.

The output terminals 11, 12, 13, and 14 of the drive IC (IC) may be modified in various ways depending on the signal wiring arrangement of the display panel. The output terminal of the drive IC (IC) may consist of only common output terminals 13. The output terminal of the drive IC (IC) may be composed of a common output terminal 13 and a gate signal output terminal 14 without a touch sensor signal terminal 12 and a data signal output terminal. The output terminal of the drive IC (IC) may be composed of a common output terminal 13, a data signal output terminal 11, and a gate signal output terminal 14 without the touch sensor signal terminal 12. The output terminal of the drive IC (IC) may be composed of a common output terminal 13, a gate signal output terminal 14, and a touch sensor signal output terminal 12 without the data signal output terminal 11.

Figure 3 is a diagram schematically showing a display device according to a first embodiment of the present invention. Figure 4 is a diagram showing an example in which the screen of a display device is divided into multiple blocks and driven. Figure 5 is a diagram showing the touch sensor driver, sensor lines, and touch sensor electrodes.

3 to 5, the display device of the present invention includes a display panel 100 and a drive IC 110 for driving the display panel 100.

The screen of the display panel 100 includes a pixel array (AA) including display signal lines and pixels. The display signal is applied to the display signal lines. The display signal lines include data lines DL and gate lines GL orthogonal to the data lines DL. Pixels of the pixel array AA are arranged in a matrix defined by data lines DL and gate lines GL.

The screen of the display panel 100 further includes touch sensor electrodes 20-24 and sensor lines SL connected to the touch sensor electrodes 20-24. A polarizing film may be attached to each of the upper and lower panels of the display panel 100. A back light unit (BLU) may be placed below the display panel 100.

The pixel array AA of the display panel 100 can be divided into a TFT array and a color filter array. A TFT array may be formed on the upper or lower panel of the display panel 100. The TFT array charges the voltage of the TFTs (Thin Film Transistors) formed at the intersections of the data lines (DL) and the gate lines (GL), the sensor lines (SL) connected to the touch sensors, and the data signal (Vdata). The pixel electrode (PIX) of the liquid crystal cell (Clc), the touch sensor electrodes (20 to 24) to which the common voltage (Vcom) and the touch sensor signal are supplied, and the storage capacitor (Storage) connected to the pixel electrode (PIX) to maintain the data signal. Displays the input image including Capacitor, Cst), etc. The common electrode (COM) of the pixels is integrated with the touch sensor electrodes 20 to 24 and divided into a touch sensor electrode pattern.

The TFT of the pixel is turned on according to the gate high voltage (VGH) of the gate signal and supplies the data signal on the data line DL to the pixel electrode (PIX). During the display period in which the data signal of the input image is written to the pixel, the liquid crystal molecules of the liquid crystal cell (Clc) are combined with the data signal applied to the pixel electrode (PIX) and the common voltage (Vcom) applied to the touch sensor electrodes 20 to 24. ) is driven according to the voltage difference to delay the phase of light incident on the display panel 100.

A color filter array may be formed on the upper or lower panel of the display panel 100. The color filter array includes a black matrix, a color filter, etc. In the case of the Color Filter on TFT (COT) or TFT on Color Filter (TOC) model, the color filter and black matrix along with the TFT array may be placed on one substrate.

Touch sensors built into the display panel may be implemented as capacitive touch sensors, for example, mutual capacitance sensors or self-capacitance sensors. Self-capacitance is formed along a single layer of conductor wiring formed in one direction. Mutual capacitance is formed between two orthogonal conductor wires. Figure 5 shows a self-capacitance type touch sensor, but the touch sensors of the present invention are not limited thereto.

Touch sensors are electrically connected to pixels through sensor lines (SL). The touch sensor electrodes 20 to 24 are implemented as a common electrode (COM) connected to multiple pixels. As shown in FIG. 6, touch sensors are connected to a plurality of pixels, supply a common voltage (Vcom) to the plurality of pixels during the display period, and sense touch input during the touch sensing period.

One frame period of the display panel 100 is time divided into one or more display sections and one or more touch sensing sections to drive the touch sensors and pixels built in the pixel array (AA). As shown in FIG. 4 , the pixel array AA of the display panel 100 may be time-dividedly driven into two or more blocks B1 to BM. The pixel array AA of the display panel 100 is divided and driven into display sections separated by a touch sensing section in which touch sensors are driven. The blocks B1 to BM do not need to be physically divided in the display panel 100.

The blocks (B1 to BM) are time-dividedly driven with a touch sensing section in between. For example, after the pixels of the first block B1 are driven during the first display period and the current frame data is written into the pixels, a touch input is sensed throughout the screen during the first touch sensing period. Following the first touch sensing period, the pixels of the second block B2 are driven during the second display period and the current frame data is written into the pixels. Subsequently, a touch input is sensed throughout the screen during the second touch sensing period. Here, the touch input may include direct touch input of a finger or stylus pen, proximity touch input, fingerprint touch input, etc.

This method of driving a touch sensor can make the touch report rate faster than the frame rate of the screen. Frame rate is the frequency of updating frame data on the screen. In the NTSC (National Television Standards Committee) method, the frame rate is 60Hz. In the PAL (Phase-Alternating Line) method, the frame rate is 50Hz. The touch report rate is the frequency at which touch input coordinates are generated. The present invention divides and drives the screen into preset block units and generates coordinates by driving a touch sensor between display sections, thereby increasing touch sensitivity by increasing the touch report rate by more than twice the frame rate of the screen.

The gate driver 120 includes a shift register that outputs a gate signal synchronized to the data signal under the control of the timing controller 130. The shift register of the gate driver 120 may be formed directly on the substrate of the display panel 100 in the left and/or right bezel area BZ of the display panel 100. The gate signal swings between the gate high voltage (VGH) and the gate low voltage (VGL) as shown in FIG. 7.

The drive IC 110 supplies the data signal of the input image to the data lines DL during the display period and senses the touch input by supplying the touch sensor signal to the sensor lines SL during the touch sensing period. From the drive IC 110, the data signal and the touch sensor signal are output through the common output terminal 13. Accordingly, the number of output terminals of the drive IC 110 can be reduced to about half of the existing level. As a result, the present invention can reduce the size of the drive IC 110 and the bezel area (BZ) of the display panel 100. When the drive IC 110 is implemented as a COG (Chip On Glass) type IC package bonded on the substrate of the display panel 100, the input terminals 10 and output terminals 11 to 14 are attached to the bottom of the IC package. It is implemented as a bump formed in .

The timing controller 130 transmits pixel data of the input image received from the host system 200 to the drive IC 110. The timing controller 130 controls the operation timing of the drive IC 110 and the gate driver 120 using a timing signal received in synchronization with pixel data. The timing controller 130 generates a synchronization signal (Tsync) that defines the display section and the touch sensing section. As shown in FIG. 6, the first logic section of the synchronization signal Tsync may define the display section D1 and D2, and the second logic section may define the touch sensing section T1 and T2. The first logic section may be a high logic value and the second logic section may be a low logic value, but are not limited thereto.

The host system 200 may be any one of a television system, a set-top box, a navigation system, a personal computer (PC), a home theater system, a mobile device system, and a wearable system. The host system 200 converts the pixel data of the input image into a format suitable for display on the display panel 100. The host system 200 transmits a timing signal along with pixel data of the input image to the timing controller 130. In the case of a mobile device or wearable system, a timing controller 130 and a power circuit (not shown) may be built into the drive IC 110.

The drive IC 110 includes a display driver 111 and a touch sensor driver 112. Channels of the display driver 111 and channels of the touch sensor driver 112 share a common bump. The display driver 111 receives pixel data (digital data) of the input image received from the timing controller 130 during the display period (D1, D2), latches this data, and performs a digital-to-analog converter (digital-to-analog converter). - Supply to Analog Converter (hereinafter referred to as “DAC”). The DAC converts pixel data into an analog gamma compensation voltage and outputs a data signal. The data signal is output to the data lines DL through the output buffer and the common bump 13.

The touch sensor driver 112 applies a common voltage (Vcom), which is a reference potential of pixels, to the sensor lines (SL) during the display period (D1, D2) to the touch sensor electrodes (20 to 24) through the sensor lines (SL). supply to. The touch sensor driver 112 supplies a touch sensor signal to the sensor lines SL during the touch sensing period to charge the touch sensor electrodes 21 to 24. The touch sensor driver 112 determines a touch input by measuring the change in capacitance of the touch sensor before and after the touch input at each of the touch sensor electrodes 20 to 24 during the touch sensing period. The touch sensor driver 112 transmits coordinate information including location information for each touch input and identification information to the host system. Identification information distinguishes each touch input from multi-touch input. The host system can execute an application linked to touch input coordinates.

As shown in FIG. 5, the touch sensor driver 112 includes a multiplexer (hereinafter referred to as “MUX”) 121, a sensing unit 122, and an algorithm execution unit 123. The MUX 121 sequentially selects sensor lines SL connected to the sensing unit 122 under the control of the algorithm execution unit 123. The MUX 121 reduces the number of channels of the sensing unit 122 by sequentially connecting the sensor lines SL to the sensing unit 122 in response to the MUX control signal from the algorithm execution unit 123 during the touch sensing period. You can. In FIG. 5 , numbers 1 to 40 on the touch sensor electrodes 21 to 24 are touch sensor numbers.

The MUX 121 supplies a common voltage (Vcom) to the sensor lines (SL) during the display period. And the MUX 121 supplies a touch sensor signal to the sensor lines SL during the touch sensing period.

The sensing unit 122 supplies a touch sensor signal to the touch sensors through the MUX 121 and the sensor lines (SL) to charge the touch sensors, and the sensor line (SL) connected through the MUX 121. The charge amount of the touch sensor signal received is amplified and integrated and converted into digital data to sense the change in capacity before and after the touch input. To this end, the sensing unit 122 includes a charge transferor for supplying a touch sensor signal to the sensor line (SL), an amplifier for amplifying the voltage on the sensor line (SL), an integrator for accumulating the output voltage of the amplifier, It includes an analog-to-digital converter (hereinafter referred to as “ADC”) that converts the voltage of the integrator into digital data. The digital data output from the ADC is transmitted to the algorithm execution unit 123 as touch raw data (hereinafter referred to as “touch data”) that indicates the change in capacity of the touch sensor before and after the touch input.

The algorithm execution unit 123 compares the touch data received from the touch sensor driver 112 with a preset threshold, detects touch data higher than the threshold, and generates coordinates for each touch input. The algorithm execution unit 123 transmits the coordinates (Txy) of each touch input to the host system 200.

6 and 7 are waveform diagrams showing a method of driving the pixels and touch sensors of the display panel 100.

Referring to Figures 6 and 7, one frame period can be time-divided into a display period (D1, D2) and a touch sensing period (T1, T2). When the display frame rate is 60Hz, one frame period is approximately 16.7ms. One touch sensing section (T1, T2) is allocated between the display sections (D1, D2).

The display driver 111 and the gate driver 120 of the drive IC 110 write the current frame data to the pixels of the first block B1 during the first display period D1 and reproduce it in the first block B1. Updates the video with the current frame data. During the first display period D1, pixels of blocks other than the first block B1 maintain previous frame data. The touch sensor driver 112 supplies a common voltage (Vcom) to the touch sensors during the first display period (D1).

The touch sensor driver 112 sequentially drives all touch sensors on the screen during the first touch sensing period T1 to sense a touch input. The touch sensor driver 112 analyzes touch data obtained from touch sensors during the second touch sensing period T2 and generates touch report data including coordinate information and identification information for each touch input to be sent to the host system. Send to (200).

The display driver 111 and the gate driver 120 write the current frame data to the pixels of the second block B2 during the second display period D2 and convert the image reproduced in the second block B2 into the current frame data. Update with During the second display period D2, pixels of blocks other than the second block B2 maintain previous frame data. The touch sensor driver 112 supplies a common voltage (Vcom), which is a common voltage of pixels, to the touch sensors during the second display period (D2).

The touch sensor driver 112 senses a touch input by sequentially driving all touch sensors in the screen during the second touch sensing period T2. The touch sensor driver 112 analyzes touch data obtained from touch sensors during the second touch sensing period T2, generates touch report data including coordinate information and identification information for each touch input, and transmits it to the host system 200. do.

During the touch sensing section, a no-load AC signal of the same phase as the touch sensor signal (Vtouch) is generated as an AC signal in the sensor lines (SL), data lines (DL), and gate lines (GL) that are not connected to the sensing unit. (LFD) may be authorized.

The waveform of the no-load alternating current signal (LFD) applied to the sensor lines SL is generated with the same phase and voltage as the touch sensor signal. In FIG. 7, ΔVtouch is a no-load alternating current signal (LFD) applied to the sensor lines (SL). ΔVd is the voltage of the no-load alternating current signal (LFD) applied to the data lines DL. ΔVg is the voltage of the no-load alternating current signal (LFD) applied to the gate lines (GL).

The phase and voltage of the no-load signal (LFD) applied to the sensor lines (SL), data lines (DL), and gate lines (GL) are the same? That is, in FIG. 7, ΔVtouch = ΔVd = ΔVg. When the no-load AC signal (LFD) applied to the sensor lines (SL) is a voltage swinging between 2V and 8V (ΔVtouch = 6V), the no-load AC signal (LFD) applied to the data lines (DL) also swings between 2V and 8V. It can be generated with a voltage that swings between 8V (ΔVd = 6V).

During the touch sensing section (T1, T2), a no-load AC signal in each of the parasitic capacitance between the data line (DL) and the touch sensor, the parasitic capacitance between the gate line (GL) and the touch sensor, and the parasitic capacitance between the sensor lines (SL) Because there is no voltage difference between the two ends of the parasitic capacitance due to the (LFD), the influence of the parasitic capacitance connected to the sensor lines (SL) during the touch sensing section (T1, T2) can be minimized. When the parasitic capacitance of the sensor lines SL is minimized, the noise applied to the sensor lines SL through the parasitic capacitance is reduced, so touch sensing sensitivity can be improved.

A stabilization time (Δtd) until the waveform and voltage of the no-load signal (LFD) are stabilized when switching from the display period (D1, D2) to the touch sensing period (T1, T2) can be set. The stabilization time (Δtd) can be appropriately adjusted depending on the parasitic capacitance of the display panel 100 and the touch sensor signal voltage (Vtouch). After the stabilization time Δtd, the touch sensors 20 to 24 are driven to sense the touch input. In FIG. 7 , VcomH and VcomL are the high level voltage and low level voltage of the no-load signal (LFD) applied to the sensor lines (S1) and the data lines (DL). VGHM and VGLM are the high level voltage and low level voltage of the no-load signal (LFD) applied to the gate lines (GL).

Figure 8 is a diagram showing the common link wiring 81 in detail. FIG. 9 is a diagram showing the drive IC 110 and touch sensors. FIG. 10 is a diagram showing bumps disposed on the bottom of the drive IC 110.

Referring to FIGS. 8 to 10 , one or more drive ICs 110 may be adhered to the substrate of the display panel 100 using a COG process.

Drive IC 110 includes multiple input bumps 10 and common bumps 13. The bumps 113 and 114 of the drive IC 110 are bonded to the adhesive area DA on the substrate of the display panel 100 through an anisotropic conductive film (ACF).

The bezel area BZ at the top or bottom of the display panel PNL is divided into a pad area PA where the drive IC 110 is attached, and a link area LA where the common link wires 11 are formed.

The input bumps 10 of the drive IC 110 are electrically connected to the timing controller 130 mounted on a printed circuit board (PCB) and a power circuit (not shown). The common bumps 13 of the drive IC 110 are connected 1:1 to the panel pads 82 through the conductive balls of the ACF. The common bumps 13 of the drive IC 110 are output bumps that are commonly (or in parallel) connected to the data line DL and the sensor line SL through the panel pad 82 and the common link wire 81. am.

Each of the common link wires 81 is connected to one data line (DL) and one sensor line (SL). Each of the common link wires 81 is electrically connected to the common bump 13 through the panel pad 82 and the conductive ball of the ACF, and this common bump 13 is electrically connected to the data line DL and the sensor line SL. Connect to The pitch between the common link wires 11 may become narrower toward the panel pads 82 and the common bump 13 of the drive IC 110.

Generally, the gap between wires formed on the display panel substrate is wider than the pitch between output bumps of the drive IC 110. Considering this spacing difference, the display signal lines of the display panel 100 are connected 1:1 to the narrow pitch panel pads 82 through the link wires 81. The gap between the link wires 81 narrows toward the panel pad 82 and becomes the same as the gap between the common bumps of the drive IC 110. Conventionally, the output bumps of the drive IC 110 are separated into output bumps connected to the data line DL and output bumps connected to the sensor lines, so that the number of output bumps of the drive IC 110 is large and the link is correspondingly large. The number of wires 82 is large. In contrast, in the present invention, each common link wire 81 is connected to the common bumps 13 of the drive IC 110, and one data line DL and one sensor line are connected to the common link wire 81. Since SL) is connected in common, the number of output bumps and link wires 11 connected to the data lines (DL) and sensor lines (SL) in the drive IC 110 are reduced to 1/2 compared to the prior art. It can be reduced to level. As a result, the present invention can reduce the size of the drive IC 110 and reduce the bezel (BZ) of the display panel.

FIG. 11 is a circuit diagram showing the drive IC 110 and the display panel 100 in detail. The switch elements M1 to M6 shown in FIG. 11 may be implemented as transistors. Each of the switch elements M1 to M6 is controlled by a display enable signal D and a touch enable signal T generated from the timing controller 130. In FIG. 11, '20' is a touch sensor electrode in the pixel array (AA) area, and '30' is a data line in the pixel array (AA) area.

Referring to FIG. 11, the drive IC 110 includes a first switch element M1 connected between the display driver 111 and the common bump 13, and a first switch element M1 connected between the touch sensor driver 112 and the common bump 13. It further includes a second switch element (M2).

The first switch element (M1) is turned on during the display period (D1, D2) in response to the display enable signal (D) and receives a data signal (Vdata) of the input image output from the display driver 111. ) is supplied to the common bump (13). The display enable signal D is synchronized with the first logic period of the synchronization signal Tsync and is activated in the display periods D1 and D2. The first switch element M1 includes a gate to which the display enable signal D from the timing controller 130 is applied, a drain connected to the display driver 111, and a source connected to the common bump 13.

The second switch element (M2) is turned on during the touch sensing period (T1, T2) in response to the touch enable signal (T) and transmits the touch sensor signal (Vtouch) from the touch sensor driver 112 to the common bump (13). ) is supplied. The touch enable signal T is synchronized with the second logic period of the synchronization signal Tsync and is activated in the touch sensing periods T1 and T2. The second switch element M2 includes a gate to which the touch enable signal T from the timing controller 130 is applied, a drain connected to the touch sensor driver 112, and a source connected to the common bump 13.

The touch enable signal (T) is a signal inverted by an inverter of the synchronization signal (Tsync) and can be input to the gate of the second switch element (M2), and the display enable signal (D) is the synchronization signal (Tsync). ) can be input to the gate of the first switch element (M1). In this case, the display enable signal (D) and the touch enable signal (T) may not be separated into two signals but may be generated as one synchronization signal (Tsync).

The display driver 111 includes an output buffer 91 that transfers the data signal output from the DAC to the first switch element M1. The output buffer 91 is implemented with an operational amplifier. The touch sensor driver 112 includes a charge transmitter 92 of the sensing unit 122 that supplies a touch sensor signal (Vtouch) to the second switch element (M2). The charge transfer unit 92 is implemented with an operational amplifier and a feedback capacitor. The LFD driver 93 is connected to the reference voltage input terminal of the charge transmitter 92. The LFD driver 93 supplies an AC reference voltage to the reference voltage input terminal of the operational amplifier, and the charge transmitter 92 supplies a touch sensor signal (Vtouch) that swings according to the AC signal to the second switch element (M2). .

Each of the common bumps 13 is connected to the data line DL and the sensor line SL of the display panel 100 via the common link wire 81.

The display panel 100 includes a common link wire 81 connected to the common bump 13 of the drive IC 110, a third switch element M3 connected between the common link wire 81 and the data line DL, and a common link wire 81 connected to the common bump 13 of the drive IC 110. A fourth switch element (M4) connected between the link wire 81 and the sensor line (SL), a fifth switch element (M5) connected between the LFD driver 94 and the data line (DL), and the Vcom generator 95 ) and a sixth switch element (M6) connected between the sensor line (SL).

The third switch element M3 is turned on during the display periods D1 and D2 in response to the display enable signal D and supplies the data signal output from the display driver 111 to the data line DL. The data signal Vdata is applied to the pixel electrode PIX through the TFT in each pixel. The third switch element M3 includes a gate to which the display enable signal D is applied, a drain connected to the common bump 13 through the common link wire 81, and a source connected to the data line DL.

The fourth switch element (M4) is turned on during the touch sensing period (T1, T2) in response to the touch enable signal (T) and transmits the touch sensor signal (Vtouch) from the touch sensor driver 112 to the sensor line (SL). ) is supplied. The fourth switch element M4 includes a gate to which the touch enable signal T is applied, a drain connected to the common bump 13 through the common link wire 81, and a source connected to the sensor line SL.

The fifth switch element (M5) is turned on during the touch sensing period (T1, T2) in response to the touch enable signal (T) and transmits the no-load alternating current signal (LFD) output from the LFD driver 94 to the data line (DL). ) is supplied to. Therefore, since the no-load alternating current signal (LFD) of the same phase as the touch sensor signal (Vtouch) is applied to the data lines (DL) during the touch sensing period (T1, T2), there is a gap between the sensor line (SL) and the data line (DL). Parasitic capacity can be minimized. The fifth switch element M5 includes a gate to which the touch enable signal T is applied, a drain connected to the LFD driver 94, and a source connected to the data line DL. The LFD driver 94 generates a no-load alternating current signal (LFD) of the same phase as the touch sensor signal (Vtouch) during the touch sensing period (T1, T2).

The sixth switch element (M6) is turned on during the display period (D1, D2) in response to the display enable signal (D) to transmit the common voltage (Vcom) from the Vcom generator 95 to the sensor line (SL). supply. The common voltage Vcom is applied to the touch sensor electrode 20 connected to the pixels through the sensor line SL. The sixth switch element M6 includes a gate to which the display enable signal D is applied, a drain connected to the Vcom generator 95, and a source connected to the sensor line SL. The Vcom generator 95 generates the common voltage (Vcom) of the pixels when the pixels charge the data voltage (Vcom).

Each of the Vcom generator 95 and the LFD driver 94 may be formed one by one on the drive IC 110 or the display panel 100. In this case, the Vcom generator 95 is connected to all sixth switch elements (M6) on the display panel 100, and the LFD driver 94 is connected to all fifth switch elements (M5) on the display panel 100. connected to The third to sixth switch elements M3 to M6 may be arranged in the link area LA.

FIG. 12 is a diagram showing the signal flow between the drive IC 110 and the display panel 100 during the touch sensing sections T1 and T2.

Referring to FIG. 12, the second, fourth, and fifth switch elements (M2, M4, and M5) are turned on during the touch sensing period (T1, T2), while the first, third, and sixth switch elements are turned on. (M1, M3, M6) are turned off. Therefore, the touch sensor signal (Vtouch) from the touch sensor driver 112 is transmitted through the second switch element (M2), the common bump 13, the common link wire 81, and the fourth switch element (M4) through the sensor lines. (SL) is supplied. At the same time, the no-load AC signal LFD from the LFD driver 94 is supplied to the data lines DL through the fifth switch element M5.

FIG. 13 is a diagram showing the signal flow between the drive IC 110 and the display panel 100 during the display sections D1 and D2.

Referring to FIG. 13, the first, third, and sixth switch elements (M1, M3, and M6) are turned on during the display period (D1, D2), while the second, fourth, and fifth switch elements are turned on. (M2, M4, M5) are turned off. Accordingly, the data signal (Vdata) from the display driver 111 passes through the first switch element (M1), the common bump 13, the common link wire 81, and the third switch element (M3) to the data lines (DL). ) is supplied to. At the same time, the common voltage Vcom from the Vcom generator 95 is supplied to the sensor lines SL through the sixth switch element M6.

By integrating the gate driver 120 into the display driver 111 of the drive IC, the gate driver 120 can be removed from the display panel 100. In this case, as shown in the example of FIG. 14, the left and right bezels (BZ) of the display panel 100 can be minimized.

Figure 14 is a diagram schematically showing a display device according to a second embodiment of the present invention. FIG. 15 is a diagram showing a link area between output terminals of the drive IC shown in FIG. 14 and display signal lines.

Referring to FIGS. 14 and 15, the display signal lines are connected to data lines DL, horizontal gate lines GL orthogonal to the data lines DL, and horizontal gate lines through contact holes. It includes vertical gate lines (VGL) connected to fields (GL).

Data lines DL, vertical gate lines VGL, and sensor lines SL are formed on the display panel 100 as long vertical wires along the vertical direction Y. The horizontal gate line GL is formed on the display panel 100 in the form of a long horizontal wire along the horizontal direction X and intersects the vertical wires DL, VGL, and SL.

One end of the vertical wires (DL, VGL, SL) is connected to the drive IC 300. As shown in FIG. 17, the vertical gate lines (VGL) are connected 1:1 to the horizontal gate lines (GL) through the contact hole (GHOLE).

The drive IC 300 supplies display signals to the data lines DL and gate lines GL during the display periods D1 and D2. The display signal includes a data signal supplied to the data lines DL and a gate signal supplied to the gate lines VGL and GL. The gate signal is sequentially shifted by a shift register and applied to the gate lines (VGL, GL).

The drive IC 300 supplies a touch sensor signal (Vtouch) to the sensor lines (SL) during the touch sensing period (T1, T2), and provides a no-load alternating current signal (LFD) in the same phase as the touch sensor signal (Vtouch) as a display signal. Supply to lines (DL, VGL, GL).

The drive IC 300 includes a display driver 301 and 302, a touch sensor driver 303, and an LFD driver 304 and 305. The display drivers 301 and 302 generate display signals through a display signal channel. The touch sensor driver 303 generates a touch sensor signal (or no-load AC signal) through the touch sensor signal channel.

Among the vertical wires DL, VGL, and SL, the other ends of the vertical gate lines VGL and the sensor lines SL may be connected to a separate driver. As shown in FIG. 17, the Vcom generator 307 is connected to the other end of the sensor lines (VGL) through the second common wiring (BL2) and generates a common voltage (Vcom) during the display periods (D1 and D2). Supply to lines (SL). As shown in FIG. 17, the LFD driver 306 is connected to the other end of the vertical gate lines (VGL) through the first common wiring (BL1) and generates a no-load alternating current signal (LFD) during the touch sensing periods (T1 and T2). is supplied to the gate lines (VGL, GL).

The Vcom generator 307 and the LFD driver 306 may be formed on the display panel 100 or built into the drive IC 300. When the Vcom generator 307 and the LFD driver 306 are integrated into the drive IC 300, most of the output terminals 11 and 13 of the drive IC 300 are connected to the vertical wirings DL, VGL, and SL. Connected to one end, some output terminals of the drive IC 300 may be connected to the other end of some vertical wires (VGL, SL) through a separate circuit board such as FPC (Flexible Printed Circuits).

The link area LA of the display panel 100 may be formed with common links and data links. The common links shown in FIG. 15 include common link wires 81 connecting the common bumps 13 of the drive IC 300 and the display signal lines DL and VGL. In the drive IC 300, channels in the ROIC area are connected to common link wires 81 through common bumps 13. The ROIC area includes the second display driver 302 and the touch sensor driver 303 in FIG. 18 .

In FIG. 15, the data links include data link wires connecting the data signal output terminal 11 and the data lines DL. In the drive IC 300, channels in the SIC area are connected to data link wires through data bumps. The data link wires are connected 1:1 to the data lines (DL) of the pixel array. In the link overlap area shown in FIG. 15, common link wires 81 and data link wires intersect.

FIG. 16 is a diagram showing bumps disposed on the bottom of the drive IC 300.

Referring to FIG. 16, the output terminals of the drive IC 300 include data signal bumps 11 and common bumps 13. The data signal bumps 11 are connected to the data lines DL through data links and supply the data signal generated from the first display driver 301 to the data lines DL. The common bumps 13 alternately transmit the gate signal and the touch sensor signal generated from the second display driver 302 and the touch sensor driver 303 to the vertical gate lines (VGL) and the vertical gate lines (VGL) through the common link lines 81. Supply to sensor lines (SL).

FIG. 17 is a plan view showing in detail display signal lines and sensor signal lines in the display panel 100 shown in FIG. 15.

Referring to FIG. 17, the vertical gate lines (VGL) are connected to the horizontal gate lines (GL) through the first contact hole (GHOLE). The sensor lines SL are connected to the touch sensor electrodes 20 through the second control hole CHOLE. Accordingly, when a gate signal is applied to the vertical gate lines (VGL), the gate signal is supplied to the horizontal gate lines (GL). When the common voltage (Vcom) and the no-load alternating current signal (LFD) are supplied to the sensor lines (SL), the voltage of this signal is supplied to the touch sensor electrodes 20.

Figure 18 is a circuit diagram showing the drive IC 300 and the display panel in detail.

Referring to FIG. 18, the first data signal channels of the drive IC 300 are the seventh switch element (M07) connected between the first display driver 301 and the data signal bump 11, the LFD driver 305, and the data It includes an eighth switch element (M08) connected between the signal bumps (11). The data signal Vdata output through the first display driver 301 is output to the data lines DL through the output buffer 183 and the data signal bump 11.

The seventh switch element (M07) is turned on during the display period (D1, D2) in response to the display enable signal (D) and converts the data signal (Vdata) output from the first display driver 301 into a data signal bump ( 11) is supplied. The seventh switch element M07 includes a gate to which the display enable signal D from the timing controller 130 is applied, a drain connected to the first display driver 301, and a source connected to the data signal bump 11. do.

The LFD driver 305 generates a no-load alternating current signal (LFD) during the touch sensing period (T1, T2). The eighth switch element (M08) is turned on during the touch sensing period (T1, T2) in response to the touch enable signal (T) and converts the no-load alternating current signal (LFD) output from the LFD driver 305 into a data signal bump ( 11) is supplied. The eighth switch element M08 includes a gate to which the touch enable signal T is applied, a drain connected to the LFD driver 305, and a source connected to the data signal bump 11.

The second data signal channels of the drive IC 300 include a first switch element M01 connected between the second display driver 302 and the common bump 13. The touch sensor channels of the drive IC 300 further include a second switch element M02 connected between the touch sensor driver 303 and the common bump 13. The second display driver 302 generates a gate signal. The touch sensor driver 303 generates a touch sensor signal.

The first switch element (M01) is turned on during the display period (D1, D2) in response to the display enable signal (D) and supplies the gate signal output from the second display driver 302 to the common bump 13. do. The first switch element M01 includes a gate to which the display enable signal D is applied, a drain connected to the second display driver 302, and a source connected to the common bump 13.

The second switch element (M02) is turned on during the touch sensing period (T1, T2) in response to the touch enable signal (T) and uses the touch sensor signal (or no-load AC signal) from the touch sensor driver 303. Supplied with bump (13). The second switch element M02 includes a gate to which the touch enable signal T is applied, a drain connected to the touch sensor driver 303, and a source connected to the common bump 13.

The second display driver 302 outputs a gate signal through the output buffer 181. The touch sensor driver 112 includes a charge transmitter 182 of the sensing unit 122 that supplies a touch sensor signal (or no-load AC signal) to the second switch element M02.

The display panel 100 includes a common link wire 81 connected to the common bump 13 of the drive IC 110, and a third switch element (M03) connected between the common link wire 81 and the gate lines (VGL, GL). , a fourth switch element (M04) connected between the common link wire 81 and the sensor line (SL), a fifth switch element (M05) connected between the LFD driver 306 and the gate lines (VGL, GL), and Vcom. It has a sixth switch element (M06) connected between the generator 307 and the sensor line (SL).

The third switch element (M03) is turned on during the display period (D1, D2) in response to the display enable signal (D) and transmits the gate signal output from the second display driver 302 to the gate lines (VGL, GL). supply to. The third switch element (M03) includes a gate to which the display enable signal (D) is applied, a drain connected to the common bump 13 through the common link wire 81, and a source connected to the gate lines (VGL, GL). do.

The fourth switch element (M04) is turned on during the touch sensing period (T1, T2) in response to the touch enable signal (T) and detects the touch sensor signal (or no-load AC signal) from the touch sensor driver 303. It is supplied through line (SL). The fourth switch element M04 includes a gate to which the touch enable signal T is applied, a drain connected to the common bump 13 through the common link wire 81, and a source connected to the sensor line SL.

The fifth switch element (M05) is turned on during the touch sensing period (T1, T2) in response to the touch enable signal (T) and transmits the no-load alternating current signal (LFD) output from the LFD driver 305 to the gate line (GL). ) is supplied to. The fifth switch element M5 includes a gate to which the touch enable signal T is applied, a drain connected to the LFD driver 306, and a source connected to the gate lines VGL and GL. The LFD driver 306 generates a no-load alternating current signal (LFD) during the touch sensing period (T1, T2).

The sixth switch element (M06) is turned on during the display period (D1, D2) in response to the display enable signal (D) to apply the common voltage (Vcom) from the Vcom generator 307 to the sensor line (SL). supply. The common voltage Vcom is applied to the touch sensor electrode 20 connected to the pixels through the sensor line SL. The sixth switch element M06 includes a gate to which the display enable signal D is applied, a drain connected to the Vcom generator 307, and a source connected to the sensor line SL.

Each of the Vcom generator 307 and the LFD driver 306 may be formed one by one on the drive IC 110 or the display panel 100. In this case, the Vcom generator 307 is connected to all sixth switch elements (M06) on the display panel 100, and the LFD driver 306 is connected to all fifth switch elements (M05) on the display panel 100. connected to The third to sixth switch elements M3 to M6 may be arranged in the link area LA.

FIG. 19 is a waveform diagram showing the output signal of the drive IC shown in FIG. 15. In FIG. 19, the output terminal of the LFD driver 306 is floated by the fifth switch element M05 during the display periods D1 and D2. The output terminal of the Vcom generator 307 is floated by the sixth switch element M06 during the touch sensing period T1 and T2.

FIG. 20 is a diagram showing the signal flow between the drive IC 300 and the display panel 100 during the touch sensing sections T1 and T2. FIG. 21 is a diagram showing the signal flow between the drive IC and the display panel shown in FIG. 15 during the display sections D1 and D2.

Referring to FIG. 20, the second, fourth, fifth, and eighth switch elements (M02, M04, M05, and M08) are turned on during the touch sensing period (T1, T2), while the first, third, and third switch elements (M02, M04, M05, and M08) are turned on. , sixth, and seventh switch elements (M01, M03, M06, and M07) are turned off. Therefore, the touch sensor signal (Vtouch) from the touch sensor driver 112 is transmitted through the second switch element (M02), the common bump 13, the common link wire 81, and the fourth switch element (M04) through the sensor lines. (SL) is supplied. At the same time, the no-load AC signal (LFD) from the LFD driver 306 is supplied to the gate lines (VGL, GL) through the fifth switch element (M05), and the no-load AC signal (LFD) from the LFD driver 305 is supplied to the gate lines (VGL, GL) LFD) is supplied to the data lines DL through the eighth switch element M08.

Referring to FIG. 21, the first, third, sixth, and seventh switch elements (M01, M03, M06, and M07) are turned on during the display period (D1, D2), while the second, fourth, and The fifth and eighth switch elements (M02, M04, M05, and M08) are turned off. Accordingly, the data signal Vdata from the first display driver 301 is supplied to the data lines DL through the seventh switch element M07 and the data signal bump 11. At the same time, the gate signal from the second display driver 302 passes through the first switch element (M01), the common bump 13, the common link wire 81, and the third switch element (M03) to the gate lines (VGL). , GL). At this time, the common voltage (Vcom) is supplied to the sensor lines (SL) through the sixth switch element (M06).

The common bump 13 of the drive IC 300 is divided into one or more first common bumps that alternately output a data signal and a touch sensor signal, and one or more second common bumps that alternately output a gate signal and a touch sensor signal. You can lose.

Through the above-described content, those skilled in the art will be able to see that various changes and modifications can be made without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to what is described in the detailed description of the specification, but should be defined by the scope of the patent claims.

13: Common output terminal (common bump) 82: Panel pad
20~24: Touch sensor electrodes 91, 181, 183: Output buffer
92, 182: charge transmitter 93, 94, 305, 306: LFD driving unit
95, 307: Vcom generator 100: display panel
110: Drive IC (Drive IC) 111, 301, 302: Display driving unit
112, 303: touch sensor driver 120: gate driver
130: Timing controller M1~M6, M01~M08: Switch element

Claims (15)

a first display driver that generates a data signal to be applied to the data line of the display panel;
a second display driver that generates a gate signal to be applied to the gate line of the display panel;
A touch sensor driver that generates a touch sensor signal;
a common output terminal through which the gate signal and the touch sensor signal are output in time division;
a seventh switching element connected between the first display driver and the data signal bump to output the data signal to the signal bump during a display period; and
An eighth switching element is connected between a node connecting the seventh switching element and the data signal bump and an LFD driver that generates a no-load alternating current signal (LFD), and supplies the no-load alternating current signal to the data signal bump. Drive IC. delete According to claim 1,
a first switch element connected between the second display driver and the common output terminal to supply the gate signal to the common output terminal; and
Further comprising a second switch element connected between the touch sensor driver and the common output terminal to supply the touch sensor signal to the common output terminal,
A drive IC in which the first and second switch elements are alternately turned on. According to claim 3,
1 frame period is divided into one or more display sections and one or more touch sensing sections,
The first switch element is turned on in the display period in response to a display enable signal,
A drive IC wherein the second switch element is turned on in the touch sensing period in response to a touch enable signal. delete A display panel including display signal lines and sensor lines including gate lines and data lines connected to pixels; and
A drive IC including a common output terminal selectively connected to the gate line and the sensor line,
The drive IC is,
a first display driver that generates a data signal to be applied to a data line of the display panel;
a second display driver that generates a gate signal to be applied to the gate line of the display panel;
A touch sensor driver that generates a touch sensor signal;
a common output terminal through which the gate signal and the touch sensor signal are output in time division;
a seventh switching element connected between the first display driver and the data signal bump to output the data signal to the signal bump during a display period; and
An eighth switching element is connected between a node connecting the seventh switching element and the data signal bump and an LFD driver that generates a no-load alternating current signal (LFD), and supplies the no-load alternating current signal to the data signal bump; ,
A display device in which the gate signal and the touch sensor signal are output alternately through the common output terminal. According to claim 6,
The drive IC is,
a first switch element connected between the second display driver and the common output terminal to supply the gate signal to the common output terminal; and
Comprising a second switch element connected between the touch sensor driver and the common output terminal to supply the touch sensor signal to the common output terminal,
A display device in which the first and second switch elements are alternately turned on. delete According to claim 7,
The display panel is,
a common link wire connected to the gate line and the sensor line; and
Provided with a pad connected to the common link wiring,
A display device in which the common output terminal is electrically connected to the pad. delete According to claim 7,
The touch sensor driver,
a multiplexer that selects multiple sensor lines;
a sensing unit including a charge transmitter that supplies the touch sensor signal to the second switch element; and
A display device comprising an algorithm execution unit that analyzes touch data from the sensing unit, determines a touch input, and outputs coordinate information of the touch input. According to clause 9,
The display panel is
a third switch element connected between the common link wire and the gate line to supply the gate signal to the gate line; and
Further comprising a fourth switch element connected between the common link wire and the sensor line to supply the touch sensor signal to the sensor line,
1 frame period is divided into one or more display sections and one or more touch sensing sections,
The third switch element is turned on during the display period,
The fourth switch element is turned on during the touch sensing period. According to claim 12,
The display panel is,
a fifth switch element that supplies an alternating current signal of the same phase as the touch sensor signal to the gate line during the touch sensing period; and
A display device further comprising a sixth switch element that supplies a common voltage of the pixels to the sensor line during the display period. According to claim 13,
The touch sensor signal is applied to the touch sensor electrode through the sensor line during the touch sensing period,
A display device in which the common voltage is applied to the touch sensor electrode through the sensor line during the display period. According to claim 14,
The alternating current signal is applied to the pixel electrode through the data line during the touch sensing period,
A display device in which the data signal is applied to the pixel electrode through the data line during the display period.