KR20170081071A - Driving circuit, display device and driving method thereof - Google Patents

Abstract

The present invention reduces the number of SSU (Self Sensing Unit) blocks of a touch screen driver circuit to less than half to overcome limitations of a chip size or reduce a touch sensing time to less than half, thereby realizing a high resolution and large area insensitive touch screen. To this end, the touch sensor control unit of the present invention drives the multiplexer by time division to simultaneously sense at least two first and third touch electrodes, and simultaneously detects at least two second and fourth touch electrodes to detect capacitance.

Description

TECHNICAL FIELD [0001] The present invention relates to a driving circuit, a display device, and a driving method thereof.

The present invention relates to a driving circuit, a display device and a driving method thereof.

Various electronic devices, such as household appliances and portable information devices, have been replaced by touch sensors in a button-type switch in accordance with the trend of weight reduction and slimness. Accordingly, an electronic device such as a display device or the like that has recently been introduced has a touch sensor (or a touch screen).

Touch sensors are essential for portable information devices such as smart phones, and are being widely applied to notebook computers, computer monitors, and home appliances. Recently, a technology (hereinafter referred to as "In-cell touch sensor") in which a touch sensor is embedded in a pixel array of a display panel has been proposed.

Incelel touch sensor technology can install touch sensors on the display panel without increasing the thickness of the display panel. An electronic device having an in-cell touch sensor includes a period for driving pixels (also referred to as a " display driving period ") and a period for driving touch sensors (referred to as a" Quot; touch screen driving period ").

The Insel touch sensor technology utilizes the electrodes connected to the pixels of the display panel as the electrodes of the touch sensors. For example, in the case of the in-line touch sensor technology, an example has been proposed in which a common electrode for supplying a common voltage to pixels of a liquid crystal display is divided and used as electrodes of touch sensors.

However, the conventional in-line touch sensor technology has a structure in which the common electrode and the sensing line are connected at a ratio of 1: 1. When the size of the display panel increases, the source drive and read out IC (SR- IC) size is also increased. Therefore, in the conventional Insel touch sensor technology, when the display panel is enlarged, limitations such as IC fabrication, wiring routing and adhering process may occur, and further improvement of fabrication cost may be required.

The present invention for solving the above-mentioned problems of the related art reduces the number of SSU (Self Sensing Unit) blocks of the touch screen driving circuit to less than half, thereby overcoming the limitation of the chip size or reducing the touch sensing time to less than half, It is to implement a large-area Insel touch screen. In addition, the present invention improves the causes of increase in manufacturing cost as well as the limitations of IC fabrication, wiring routing and adhering process when the display panel is enlarged.

According to an aspect of the present invention, there is provided a driving circuit including a multiplexer and a touch sensor controller. The multiplexer includes a channel connected to a first sensing line for sensing a first touch electrode and a third touch electrode adjacent to the first touch electrode, and a second sensing electrode for sensing a fourth touch electrode not adjacent to the second touch electrode and the second touch electrode. 2 sensing line. The touch sensor control unit drives the multiplexer in a time division manner to sense the first touch electrode and the third touch electrode at the same time, simultaneously sense the second touch electrode and the fourth touch electrode, and detects the capacitance.

The sensing circuit of the touch sensor control unit can simultaneously sense J (J is an integer of 2 or more) touch electrodes through the sensing line.

In another aspect, the present invention provides a display device including a display panel, a plurality of sensing lines, and a touch screen driving circuit. The display panel is provided with a plurality of touch electrodes. The plurality of sensing lines are electrically connected to the plurality of touch electrodes. The touch screen driving circuit detects a change amount of capacitance of the touch electrodes through a plurality of sensing lines. At least one first sensing line of the plurality of sensing lines is electrically connected to the first touch electrode and the third touch electrode adjacent to the first touch electrode and at least one second sensing line of the plurality of sensing lines The second touch electrode and the fourth touch electrode not adjacent to the second touch electrode.

The first touch electrode and the third touch electrode may be continuously arranged in the vertical direction, and the second touch electrode and the fourth touch electrode may be disposed discontinuously in the upper and lower directions.

The display panel may include first via holes electrically connecting the first touch electrode and the third touch electrode, and second via holes electrically connecting the second touch electrode and the fourth touch electrode.

The sensing circuit of the touch screen driving circuit can simultaneously sense J (J is an integer of 2 or more) touch electrodes through the sensing line.

In another aspect, the present invention provides a method of driving a display device. A method of driving a display device includes sensing a first touch electrode and a third touch electrode through a first sensing line, sensing a second touch electrode and a fourth touch electrode through a second sensing line, Detecting an intensity of the light; Determining whether the intensity of the electrostatic capacitance detected from the first and third touch electrodes and the second and fourth touch electrodes is higher than an internally set threshold voltage level; Separating the intensity of the electrostatic capacitance detected from the first and third touch electrodes and the intensity of the electrostatic capacitance detected from the second and fourth touch electrodes, respectively; And comparing the capacitance values detected from the first and third touch electrodes to calculate touch points.

The step of calculating the touch point may include weighting the first and third touch electrodes with respect to the first and third touch electrodes based on the electrostatic capacitance values detected from the second and fourth touch electrodes, And determining in which direction the electrodes and the second and fourth touch electrodes are closer to each other.

In another aspect, the present invention provides a driving circuit including a multiplexer and a touch sensor control unit. The multiplexer has a channel connected to the first touch electrodes and a channel connected to the second touch electrodes staggered to be located on different lines from the first touch electrodes. The touch sensor controller compares the capacitances detected from the first touch electrodes and the second touch electrodes by time division driving the multiplexer and defines the largest capacitance among these as the coordinates of the center of the touch point.

The touch sensor control unit can weight the electrostatic capacitances of the A (A is an integer of 2 or more) touch electrodes adjacent to the upper, lower, right, and left sides based on the electrode having the largest capacitance.

In another aspect, the present invention provides a display device including a display panel, a plurality of sensing lines, and a touch screen driving circuit. The display panel includes a plurality of touch electrodes staggered so that the first touch electrodes and the second touch electrodes are positioned on different lines. The plurality of sensing lines are electrically connected to the plurality of touch electrodes. The touch screen driving circuit detects a change amount of capacitance of the touch electrodes through a plurality of sensing lines. At least one first sensing line of the plurality of sensing lines is electrically connected to the first touch electrodes and at least one second sensing line of the plurality of sensing lines is electrically connected to the second touch electrodes.

The first touch electrodes and the second touch electrodes may be arranged to be shifted up and down so that at least some regions overlap.

The touch screen driver circuit may include a touch sensor controller that compares the capacitances detected from the first touch electrodes and the second touch electrodes and defines the largest capacitance among the capacitances as the center coordinates of the touch point.

The touch screen driver circuit can weight the electrostatic capacitances of the A (A is an integer of two or more) touch electrodes adjacent to the upper, lower, right, and left sides based on the electrode having the largest capacitance.

In another aspect, the present invention provides a method of driving a display device. A method of driving a display device includes sensing first and second touch electrodes through a first sensing line and a second sensing line and detecting intensity of electrostatic capacitance per electrode from the first touch line and the second sensing line; And comparing the capacitances detected from the first touch electrodes and the second touch electrodes and defining the largest capacitance among the capacitances as the center coordinates of the touch point.

The step of defining the coordinates of the center of the touch point may include weighting the capacitances of the A (A is an integer of 2 or more) touch electrodes adjacent to the upper, lower, left, and right sides with reference to the electrode having the largest capacitance.

Since the multi-channel can be sensed at one time, the number of SSU (Self Sensing Unit) blocks of the touch screen driving circuit can be reduced, thereby achieving cost reduction (CI) due to reduction in chip size There is an effect. In addition, the present invention has the effect of reducing the number of sensing lines. In addition, since the present invention can overcome limitations of the chip size, it is possible to easily implement a high-resolution and large-area in-cell touch screen. In addition, since the multi-sensing channel can be further increased when a low-cost or low-cost product which does not require much touch performance is used, the present invention can be advantageously applied to products requiring chip size reduction. Further, when the number of SSUs of the touch screen driving circuit is maintained as it is, the present invention can reduce the touch sensing time to less than half and enlarge the touch screen to a high resolution model. In addition, when the display panel is enlarged, the present invention has the effect of causing limitations such as IC fabrication, wiring routing and adhering process, as well as inducing an increase in manufacturing cost.

1 is a block diagram schematically showing a configuration of a display device according to a first embodiment of the present invention;
2 is a cross-sectional exemplary view of a liquid crystal display panel having a touch screen;
3 is a waveform diagram for explaining an in-cell touch type time division driving technique.
FIG. 4 is a diagram illustrating a configuration example of a touch screen of a self-touch sensing type and a touch screen driving circuit; FIG.
5 is an exemplary diagram for explaining a block of an integrated driving circuit;
6 and 7 are views for explaining a problem of the self-touch sensing method proposed in the related art.
FIG. 8 illustrates an example of a self-touch sensing touch screen and an integrated driving circuit according to a first embodiment of the present invention; FIG.
FIG. 9 is an exemplary view showing a touch screen and an integrated driver circuit of a self-touch sensing type according to a modification of the first embodiment of the present invention; FIG.
10 is a flowchart illustrating a self-touch sensing method according to a first embodiment of the present invention.
11 is a diagram illustrating an example of a single touch point detection method using the first embodiment of the present invention.
FIG. 12 shows an example of a multi-touch point detection method using the first embodiment of the present invention; FIG.
FIG. 13 illustrates an example of a self-touch sensing touch screen and an integrated driver circuit according to a second embodiment of the present invention; FIG.
14 is a view for explaining a touch electrode structure of a self-touch sensing type according to a modification of the second embodiment of the present invention.
15 is a view for explaining a method of implementing a touch electrode structure according to a second embodiment of the present invention.
16 is a flowchart illustrating a self-touch sensing method according to a second embodiment of the present invention.
17 to 18 are diagrams illustrating examples of a touch detection method using the first embodiment of the present invention.
19 is a view for explaining the difference between the conventional self-touch sensing method and the self-touch sensing method according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

An electronic device having a touch sensor according to the present invention is implemented as a television, a set-top box, a navigation device, a video player, a Blu-ray player, a personal computer (PC), a home theater and a smart phone.

An electronic device having a touch sensor according to the present invention is implemented based on a display panel as an example. The display panel may be a flat panel display panel such as a liquid crystal display panel, an organic light emitting display panel, an electrophoretic display panel, or a plasma display panel, but is not limited thereto. In the following description, a liquid crystal display panel will be described as an example for convenience of explanation.

≪ Embodiment 1 >

2 is a cross-sectional view of a liquid crystal display panel having a touch screen, and FIG. 3 is a cross-sectional view illustrating a touch panel according to an embodiment of the present invention. FIG. 4 is a diagram illustrating a configuration of a touch screen and a touch screen driving circuit of a self-touch sensing type, and FIG. 5 is an exemplary diagram illustrating a block of an integrated driving circuit.

1 to 3, a display device according to the first embodiment of the present invention includes a timing controller 20, a data driving circuit 12, a scan driving circuit 14, a liquid crystal display panel DIS, A touch screen (TSP) and a touch screen drive circuit 30 are included.

The timing controller 20 receives timing signals such as a vertical synchronizing signal Vsync, a horizontal synchronizing signal Hsync, a data enable signal DE and a main clock MCLK from a host system (not shown) (RGB), and controls the data driving circuit 12 and the scan driving circuit 14 based on the video data RGB.

The timing controller 20 generates a scan timing control signal based on a scan timing control signal such as a gate start pulse (GST), a gate shift clock, and a gate output enable (GOE) (14). The timing controller 20 generates a timing control signal based on a data timing control signal such as a source sampling clock (SSC), a polarity control signal (POL), and a source output enable (SOE) (12).

The data driving circuit 12 converts the digital video data RGB input from the timing controller 20 into an analog positive / negative gamma compensation voltage to generate a data voltage. The data driving circuit 12 supplies the data voltage through the data lines D1 to Dm.

The scan driving circuit 14 sequentially generates gate pulses (or scan pulses) synchronized with the data voltage. The scan driver circuit 14 supplies gate pulses through the gate lines G1 to Gn.

The liquid crystal display panel DIS displays an image based on the gate pulse supplied from the scan driving circuit 14 and the data voltage supplied from the data driving circuit 12. [ The liquid crystal display panel DIS includes a liquid crystal layer formed between two substrates. The liquid crystal display panel DIS may be implemented in any known liquid crystal mode such as TN (Twisted Nematic) mode, VA (Vertical Alignment) mode, IPS (In Plane Switching) mode and FFS (Fringe Field Switching) mode.

The subpixels of the liquid crystal display panel DIS are defined by data lines (D1 to Dm, m is an integer of 2 or more) and gate lines (G1 to Gn, n is an integer of 2 or more). One subpixel includes a TFT (Thin Film Transistor) formed at the intersections of the data line and the gate line, a pixel electrode for charging the data voltage, a storage capacitor Cst connected to the pixel electrode for maintaining the voltage of the liquid crystal cell ) And the like.

A black matrix, a color filter CF, and the like are formed on the inner surface of the upper substrate SUB2 of the liquid crystal display panel DIS. A thin film transistor TFT, a pixel electrode, a common electrode COM, and the like are formed on the inner surface of the lower substrate SUB1 of the liquid crystal display panel DIS. The common electrode COM to which the common voltage is supplied may be formed on the upper substrate SUB2 or the lower substrate SUB1 of the liquid crystal display panel DIS.

A cover substrate (COV) is attached to the outer surface of the upper substrate SUB2 of the liquid crystal display panel DIS. The cover substrate COV can be attached to the outer surface of the upper substrate SUB2 of the liquid crystal display panel DIS by the adhesive member ADH. The liquid crystal display panel (DIS) can be implemented as a COT (Color Filter On TFT) structure. In this case, the black matrix and the color filter CF are formed on the lower substrate SUB1 of the liquid crystal display panel DIS, unlike the drawing.

A polarizing plate is attached to the outer surfaces of the upper substrate SUB2 and the lower substrate SUB1 of the liquid crystal display panel DIS and an alignment film for setting the pretilt angle of the liquid crystal is formed on the inner surface contacting the liquid crystal cell LC . Although not shown, a column spacer for maintaining a cell gap of the liquid crystal cell LC is formed between the upper substrate SUB2 and the lower substrate SUB1 of the liquid crystal display panel DIS.

Although not shown, an upper polarizer and a lower polarizer are attached to the upper substrate SUB2 and the lower substrate SUB1 of the liquid crystal display panel DIS. Further, although not shown, a backlight unit is disposed under the rear surface of the lower polarizer plate of the liquid crystal display panel DIS. The backlight unit is implemented as an edge type or a direct type to provide light to the liquid crystal display panel DIS.

The touch screen driving circuit 30 senses the presence or absence of a touch using a touch screen TSP. The touch screen driving circuit 30 includes a driving circuit for generating a driving voltage for driving the touch sensor, and a sensing circuit for sensing the touch sensor and generating data for detecting presence / absence of touch and coordinate information. The driving circuit and the sensing circuit of the touch-screen driving circuit 30 may be formed in the form of an integrated circuit (IC) or may be divided into functions and separated.

The touch screen driving circuit 30 is formed on an external substrate connected to the liquid crystal display panel DIS or the liquid crystal display panel DIS. The touch screen driving circuit 30 is connected to the touch screen TSP through the sensing lines L1 to Li and i are positive integers. The touch screen driving circuit 30 senses the presence or absence of a touch based on a capacitance change amount (or capacitance variation) between touch sensors formed on the touch screen TSP.

The touch screen driving circuit 30 senses the presence or absence of a touch by detecting a difference in capacitance generated between a position where the user's finger is touched and a position where the user's finger is not in contact. The touch screen drive circuit 30 generates touch data (HIDxy) with respect to the presence or absence of a touch and transmits it to a host system (not shown).

The touch screen TSP is embedded in a display area of the liquid crystal display panel DIS in an in-cell self-touch manner (hereinafter referred to as self-touching). A touch screen (TSP) of the self-touch sensing type uses a block (or point) type electrode existing on the inner or outer surface of the liquid crystal display panel DIS as a touch sensor (or touch electrode).

In the case of the liquid crystal display panel DIS, it is common that the touch sensor is constituted by the common electrode COM located inside. A touch screen (TSP) of the self-touch sensing type is provided with M (M is an integer of 4 or more) subpixels (for example, 32 subpixels * 32 subpixels) formed inside the liquid crystal display panel DIS And the common electrode COM included therein constitutes one touch sensor.

The touch screen driving circuit 30 supplies touch driving signals through the sensing lines L1 to Li connected to the touch screen TSP of the self touch sensing type. When the touch screen driving circuit 30 senses the touch screen TSP by the self touch sensing method, it senses the RC delay difference DELTA t between the touch state and the no-touch state through the sensing lines L1 to Li, And recognizes that a touch is made when the RC delay difference between adjacent touch sensors becomes equal to or greater than the reference value.

A display device having a touch screen (TSP) of the self-touch sensing type performs time sharing (or time sharing) sensing in consideration of driving of the liquid crystal display panel DIS. In this method, a display driving period (Display) for displaying an image on the liquid crystal display panel DIS and a touch screen driving period (Touch) for sensing the touch screen TSP are divided in time. That is, it is time-division driven by a display driving period (Display) and a touch screen driving period (Touch).

The display driving period (Display) and the touch screen driving period (Touch) are present N times (N is an integer equal to or greater than 1) for one frame. For example, the display driving period (Display) and the touch screen driving period (Touch) may exist in a number of 1, 2, 3, 4,. The method that can be time-divisionally driven several times during one frame can be defined as a sensing method using LHB (Long Horizontal Blank).

The data driving circuit 12 and the scan driving circuit 14 are driving circuits for driving the liquid crystal display panel DIS and at least one of them is implemented in the form of an integrated circuit (IC) together with the touch screen driving circuit 30 . 4 is an example in which the data driving circuits 12a to 12c and the touch screen driving circuits 30a to 30c are implemented in the form of an integrated integrated circuit (Touch and Display Drive IC; to be.

The touch sensing area of the touch screen TSP can be divided into three areas TSA1 to TSA3 on the basis of the vertical direction y, for example. The reason why the touch sensing area is divided in the vertical direction y is to show that the design change may occur according to the physical range that the integrated driving circuits 50a to 50c can drive.

The first integrated driver circuit 50a is wired with sensing lines to sense the first touch area TSA1. The second integrated driver circuit 50b is wired with sensing lines to sense the second touch area TSA2. The third integrated driver circuit 50c is wired with sensing lines to sense the third touch area TSA3.

The integrated driving circuits 50a to 50c have a data driving circuit 12a (referred to as a source IC or a source) in a central region as shown in Fig. 5, and a touch for driving a touch screen (TSP) And the screen drive circuits 30aL and 30aR (referred to as Read Out IC or ROIC) are present. For this reason, the integrated driving circuits 50a to 50c are sometimes referred to as an SR-IC (Source drive and Read out IC).

The data pad SPAD of the data driving circuit 12a is connected to the data lines D1 to Dm of the liquid crystal display panel DIS and the touch pads TPADL and TPADR of the touch screen driving circuits 30aL and 30aR And is connected to the sensing lines L1 to Li of the touch screen TSP.

The touch screen drive circuits 30aL and 30aR include a multiplexer (MUX) and a touch sensor control unit (SENP).

The touch sensor control unit SENP includes a driving circuit and a sensing circuit. The touch sensor control unit (SENP) is implemented based on a touch sensing algorithm for sensing the presence / absence of a touch and its position. The touch sensor control unit (SENP) detects the difference in capacitance caused between the position where the user's finger is touched and the position where the user's finger is not in contact by using the touch sensing algorithm, and senses the presence or absence of the touch based on the difference.

In the touch sensor control unit (SENP), there are many sensing circuits for sensing the touch sensor (or the touch electrode), which is usually called an SSU (Self Sensing Unit = AFE). The sensing circuit SSU is a circuit composed of an amplifier, a switch, and a capacitor. Since the SSU is difficult to implement in the integrated driving circuit as many as the number of touch sensors, the entire touch screen (TSP) is sequentially time-divisionally sensed through a multiplexer (MUX).

The multiplexer MUX controls the touch pads TPADL and TPADR connected to the sensing lines L1 to Li of the touch screen TSP and the SSU of the touch sensor control unit SENP under the control of the touch sensor control unit SENP in a time- Connect. Since the touch screen driving circuits 30aL and 30aR have a multiplexer (MUX), the number of channels can be reduced.

As a result, the first to third integrated driver circuits 50a to 50c are connected to the first to Mux lines MUX1 to MUX16 of the touch screen TSP by the operation of the multiplexer MUX I mux line (I is an integer of 2 or more)). At this time, the sensing operation of the touch screen TSP may be performed in the y2 direction starting from the top to be completed in the bottom, but is not limited thereto.

6 and 7 are views for explaining the problems of the self-touch sensing method proposed in the related art.

As shown in FIGS. 6 and 7, the conventional method adopts a structure in which the touch sensor CS (or the touch electrode) and the sensing lines L1 to Li are connected at a ratio of 1: 1. The sensing lines L1 to Li are connected to the channels of the integrated driver circuit at a ratio of 1: 1, and the common voltage / touch driving signal Vcom / Tdrv is divided and transmitted for each driving period.

As described above, there is an SSU (Self Sensing Unit = AFE) for sensing one touch sensor in the touch sensor control unit of the integrated driver circuit. The SSU sequentially time-divides the entire touch screen (TSP) through a multiplexer (MUX).

However, since the sensing time per unit electrode is reduced as the ratio of the multiplexer (MUX) increases, this also has a limitation. Also, when the size of the display panel is increased, the size of the chip (source drive and read out IC; SR-IC) of the touch screen driver circuit also increases.

However, the conventional in-line touch sensor system has a structure in which a touch sensor (or a touch electrode) and a sensing line are connected at a ratio of 1: 1. When the display panel is enlarged, limitations such as IC fabrication, wiring routing, And an increase in manufacturing cost may be caused.

FIG. 8 is a view illustrating an example of a self-touch sensing type touch screen and an integrated driving circuit according to a first embodiment of the present invention. FIG. 9 is a diagram illustrating a self-touch sensing type touch screen according to a modification of the first embodiment of the present invention. And an integrated driving circuit.

In the self-touch sensing method according to the first embodiment of the present invention, only one touch sensor (hereinafter, a touch sensor is described as a touch electrode for convenience of explanation) is sensed at a time through an SSU existing in the integrated driving circuit And J (J is an integer equal to or greater than 2) touch electrodes at the same time. The number of LHB sections can be reduced by using the self-touch sensing method according to the first embodiment of the present invention.

As shown in FIGS. 8 and 9, the first to third sensing lines L1 to L3 are electrically connected to at least two odd-numbered touch electrodes CSO through an odd-numbered via hole VHO. At this time, the at least two odd-numbered touch electrodes CSO correspond to the adjacent adjacent touch electrodes. The first to third sensing lines L 1 to L 3 sense the odd-numbered touch electrodes CSO disposed on the odd-numbered lines when viewed from the vertical direction, and are therefore referred to as odd-numbered electrode sensing lines L 1 to L 3 .

The fourth to sixth sensing lines L4 to L6 are electrically connected to at least two even-numbered touch electrodes CSE through the even-numbered via holes VHE. At this time, the at least two even-numbered touch electrodes CSE correspond to the spaced-apart touch electrodes arranged discontinuously in the upper and lower sides. The fourth to sixth sensing lines L4 to L6 sense the even-numbered touch electrodes CSE disposed on the even-numbered lines when viewed from the vertical direction, and are referred to as even-numbered electrode sensing lines L4 to L6 for convenience of explanation .

Only three odd-numbered electrode sensing lines (L1 to L3) and even-numbered electrode sensing lines (L4 to L6) are shown. However, the present invention is not limited to this, as it depends on the design method, such as the number of touch electrodes arranged in the vertical direction of the touch screen TSP and the number of channels of the integrated driver circuit. That is, the odd-numbered electrode sensing lines L1 to L3 and the even-numbered electrode sensing lines L4 to L6 are wired to K (K is an integer of 3 or more).

The odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE may be patterned in a rectangular, polygonal, oval or circular shape. Hereinafter, for convenience of explanation, the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are patterned in a quadrangle will be described as an example.

Unlike the odd-numbered electrode sensing lines L1 to L3, the even-numbered electrode sensing lines L4 to L6 are connected to sense two touch electrodes which are very far apart as shown in FIG. 8, And can be implemented in various forms such as being connected to sense the two spaced apart touch electrodes at the same time. That is, the even-numbered electrode sensing lines L4 to L6 may be connected to sense two touch electrodes vertically spaced apart by at least one touch electrode.

As described above, the odd-numbered electrode sensing lines L1 to L3 for sensing the odd-numbered touch electrodes CSO and the even-numbered electrode sensing lines L4 to L6 for sensing the even-numbered touch electrodes CSE, The sensing value sensed through each line can be easily separated by a touch algorithm or the like.

For example, the sensing value of the odd-numbered touch electrode CSO may be divided or divided into individually sensed values by allocating or dividing the sensed value of the odd-numbered touch electrode CSO according to the ratio of the sensed values of the even-numbered touch electrodes CSE adjacent thereto. Therefore, even if the sensing value of the two touch electrodes is obtained at the same time, this can be easily distinguished. As a result, the SSU can simultaneously sense J (J is an integer of 2 or more) touch electrodes at a time according to the touch algorithm.

In the above description, the even-numbered electrode sensing lines L4 to L6 are connected to two touch electrodes spaced apart from each other by at least one touch electrode. However, this may be changed to the odd-numbered touch electrodes CSO and the odd-numbered electrode sensing lines L1 to L3 instead of the even-numbered touch electrodes CSE and the even-numbered electrode sensing lines L4 to L6.

The structure in which the odd-numbered touch electrodes are continuously connected to the odd-numbered electrode sensing lines and the even-numbered touch electrodes are discontinuously connected to the even-numbered electrode sensing lines as in the first embodiment of the present invention, Even if the sensing values of the two odd and even touch electrodes are obtained, it is possible to easily distinguish the sensed values by the touch algorithm, thereby reducing the number of sensing lines.

In contrast, when the odd-numbered touch electrodes are continuously connected to the odd-numbered electrode sensing lines and the even-numbered touch electrodes are continuously connected to the even-numbered electrode sensing lines, it is difficult to arrange the sensing positions differently. Therefore, When the sensing value is obtained, it becomes difficult to distinguish it by the touch algorithm.

Accordingly, the display device having the structure of the touch electrode and the sensing line according to the first embodiment of the present invention can lower the touch raw data value acquired through the sensing lines in the structure to less than half of the conventional structure. It is also possible to easily distinguish a touch point by a touch algorithm such as a weighted sum of peripheral touch electrodes or other interpolation methods.

Hereinafter, examples of the self-touch sensing method according to the first embodiment of the present invention and the single-touch and multi-touch detection using the same will be described.

FIG. 10 is a flowchart for explaining a self-touch sensing method according to the first embodiment of the present invention, FIG. 11 is an illustration of a single touch point detection method using the first embodiment of the present invention, Fig. 2 is a diagram illustrating an example of a multi-touch point detection method using the first embodiment of the present invention.

As shown in FIG. 10, the self-touch sensing method according to the first embodiment of the present invention is used in a display device having a structure of a touch electrode and a sensing line configured as shown in FIG. 9 or FIG.

The step S110 of detecting the intensity of the electrostatic capacitance for each of the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE is performed through the odd-numbered electrode sensing lines L1 to L3 and the even-numbered electrode sensing lines L4 to L6, And detects the intensity of the electrostatic capacitance per electrode from these.

The step S120 of determining whether the capacitance intensity of each electrode is higher than the threshold voltage level may be determined by comparing the magnitude of the capacitance detected from the odd-numbered touch electrodes CSO and the even- Is higher than the voltage level.

If the intensity of the capacitance detected from the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE is lower than the threshold voltage level (NO), it is regarded as a non-touch which does not correspond to the touch, Value is excluded (S170).

Alternatively, if the intensity of the capacitance detected from the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE is higher than the threshold voltage level (for example), the touch intensity is considered as a capacitance value corresponding to the touch Steps S140 and S150 are performed.

The step of separating the intensity of the odd line touch S140 is a step of separating the intensity of the capacitance detected from the adjacent odd-numbered touch electrodes CSO (adjacent touch simultaneous sensing points).

The step of separating the intensity of the even line touch (S150) is a step of separating the capacitance strength (separated touch simultaneous sensing points) detected from the even-numbered touch electrodes CSE.

The odd-numbered electrode sensing line detects electrostatic capacitance from the odd-numbered touch electrodes CSO arranged continuously in the vertical direction, and the even-numbered electrode sensing line detects electrostatic capacitance from the even-numbered touch electrodes CSE arranged discontinuously above and below. Therefore, the step of separating the intensity of the odd line touch (S140) and the intensity of the even line touch (S150) may be performed by dividing the odd numbered touch electrodes CSO and the even numbered touch electrodes And the capacitances detected from the capacitance element (CSE).

In step S160, the weights are applied to the odd-numbered touch electrodes CSO on the basis of the values of the adjacent even lines (even lines) And weighting is performed to determine in which direction the actual touch point is located where the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are disposed. At this time, the electrostatic capacitance value detected from the even-numbered touch electrodes CSE is used as a reference value that can be used when assigning weights to the odd-numbered touch electrodes CSO.

In step S170, it is determined whether or not the touch points are actually touch points by comparing the capacitance values detected from the odd-numbered touch electrodes CSO with each other, . ≪ / RTI >

The step of calculating the touch point based on the separation electrode S180 may be performed by using the capacitance value detected from the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE, In which direction the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are disposed.

The first embodiment of the present invention can detect a single-touch point and a multi-touch point by using the above-described touch detection method. Reference is now made to Figs. 10-12.

- Single touch point detection example -

An example of detecting a single touch point is an example of a touch point indicated by "TP" in a portion indicated by a block (BL) in the touch screen (TSP) of FIG. At this time, the sensitivity difference between the touch and the non-touch is 100 per point.

In FIG. 11, reference numerals 1a and 1a ', 1b and 1b', 1c and 1c 'denote odd-numbered touch electrodes arranged continuously in the vertical direction. Reference numerals 2a and 2a ',' 2c and 2c ', and 17c and 17c' denote even-numbered touch electrodes disposed discontinuously on the upper and lower sides.

When the step S110 of detecting the intensity of capacitance of each electrode is performed, the intensity of capacitance of the odd-numbered touch electrodes and the even-numbered touch electrodes is detected. If it is determined in step S120 that the electrostatic capacitance intensity of each electrode is higher than the threshold voltage level, only a value higher than the threshold voltage level of the detected electrostatic capacitance of each electrode is detected.

At this time, since the portion indicated by "TP" is the touch point, the capacitance intensity is detected at the center of the electrodes concerned and other values are lower than the threshold voltage level, so that the following values are detected.

The electrostatic capacity of the first b1b 'odd-numbered touch electrodes 1b1b' arranged in the vertical direction is detected as having a value of 50. [ The capacitance of the second c2c 'even-numbered touch electrodes 2c2c' arranged discontinuously above and below is detected to have a value of 25. The capacitances of the even-numbered touch electrodes 17c17c 'arranged discontinuously above and below are detected to have a value of 25.

A step S140 for separating the intensity of the odd line touch and a step S150 for separating the intensity of the even line touch are carried out so that the strength of the detected capacitance Sensing Point) are separated.

The odd-numbered touch electrodes 1b1b 'may be divided into a plurality of even-numbered lines (even lines) adjacent to the odd-numbered touch electrodes 1b1b' by a step S160 of assigning weights to the respective even- And a weight is given to each electrode. The expression for separating the intensity of the odd line touch (Odb Line Touch) can be expressed as follows based on the first and second odd-numbered touch electrodes 1b.

The first 1b odd-numbered touch electrode 1b is connected to the first odd-numbered touch electrodes 1b1b and the second c2c 'even-numbered touch electrodes 2c2c' And the even-numbered touch electrodes 17c17c 'adjacent thereto). According to the above equation, the intensities of the first and second odd-numbered touch electrodes 1b and 1b 'are divided as follows.

1b: 50 x (25 / (25 + 25)) = 25

1b ': 50 x (25 / (25 + 25)) = 25

At this time, if a value such as 2c2c '= 17c17c' is detected, it can be determined that the touch point is located in the center of 1b1b '.

Even numbered touch electrodes 2c2c 'and 17c17c' even-numbered touch electrodes 17c17c 'are determined by comparing the adjacent odd-numbered lines (Odd Line) Is compared with the odd line value adjacent thereto. At this time, weighting may be given to each electrode according to the comparison result. The results of comparing odd line values of adjacent odd-numbered touch electrodes 2c2c 'and 17c17c' even-numbered touch electrodes 17c17c 'are as follows.

2c: 1b1b '(50) > 1d1d' (0)

In this case, the value 25 of the second c2c 'even-numbered touch electrodes 2c2c' can be all determined to be the area of the second ceven-numbered touch electrodes 2c.

17c: 1b1b '(50) > 1d1d' (0)

In this case, the value 25 of the even-numbered touch electrodes 17c17c 'may be determined to be the area of the even-numbered even-numbered touch electrodes 17c.

After the step S180 of calculating the touch point based on the separation electrode, the capacitance value detected from the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE is used as a reference, In addition, it can be calculated in which direction the touch point is located closer to where the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are disposed.

According to the above example, the touch point TP is detected as being located in the first b1b 'odd-numbered touch electrodes 1b1b' and the second c17c even-numbered touch electrodes 2c17c. The touch point TP is detected to be positioned in the center of the electrodes 1b1b 'and 2c17c constituting the touch point TP without shifting to either side.

- Detection example of multi touch point -

The detection example of the multi-touch point is an example of the multi-touch points TP1 to TP4 indicated by "TP1, TP2, TP3, TP4" on the touch screen TSP of FIG. At this time, the sensitivity difference between the touch and the non-touch is 100 per point.

In FIG. 11, reference numerals 1a and 1a ', 1b and 1b', 1c and 1c ', 18b and 18b', 3c and 3c 'denote odd-numbered touch electrodes continuously arranged in the vertical direction. Reference numerals 2a and 2a ', 17a and 17a', 2c and 2c ', 17c and 17c', 2d and 2d '17d and 17d' denote even-numbered touch electrodes disposed discontinuously above and below.

In the detection of a multi-touch point, two touch electrodes, which are basically paired in an even-numbered column, are arranged as far as possible (half of a display). Considering the shape of the finger of a person, it is considered that the touch electrodes are not overlapped. However, in the case of overlapping, the following algorithm can be used as one of the processing methods.

Hereinafter, one example in which "TP1, TP2, TP3, TP4" are touched at the same time will be described as an example. Since the intensity of the capacitance detected at each touch electrode has been described in the detection example of the single touch point, only the strength of the capacitance is briefly described, and only the portion related to the multi touch point detection will be described.

The electrostatic capacity of the 1a1a 'odd-numbered touch electrodes 1a1a' is 50,

The electrostatic capacitance of the even-numbered touch electrodes 2a2a '

The electrostatic capacitance of the even-numbered touch electrodes 17a17a 'is detected as 75th.

Whether or not overlapping is determined based on the even line value.

At this time, only the odd-numbered touch electrodes 1a1a 'and the first c1c' odd-numbered touch electrodes 1c1c 'can be compared or all the odd-numbered touch electrodes positioned on the left and the right can be compared.

"TP1, TP2, TP3, TP4" are overlapped as they are touched at the same time.

The electrostatic capacity of the 1a1a 'odd-numbered touch electrodes 1a1a' is 50,

The capacitance of the first c1c 'odd-numbered touch electrodes 1c1c' is assumed to be 10 (assumed to be 10), and if necessary, the third c3c 'odd-numbered touch electrodes 3c3c' are also compared. As a result of comparison, the electrostatic capacitance 50 of the 1a1a 'odd-numbered touch electrodes 1a1a' is detected to be higher than the electrostatic capacitance 10 of the 1c1c 'odd-numbered touch electrodes 1c1c'.

The strengths of the second even-numbered touch electrode 2a and the second even-numbered touch electrode 2a 'are separated according to the equation used when detecting the single touch point.

2a: 75 x (5 x (5 + 50)) = 12.5

2a ': 75 x (50 x (10 + 50)) = 62.5

According to the above example, it can be determined that the touch points TP1, TP2, TP3, and TP4 are closer to the second even-numbered touch electrode 2a 'than the second even-numbered touch electrode 2a.

In the above description, the touch screen is structured in the same manner as the first embodiment of the present invention, and only one example of a method for algorithmically separating the touch screen and detecting touch points is described. Therefore, the present invention is not limited thereto.

≪ Embodiment 2 >

FIG. 13 is a view illustrating an example of a self-touch sensing type touch screen and an integrated driving circuit according to a second embodiment of the present invention. FIG. 14 is a view showing a touch screen of the self-touch sensing type according to a modification of the second embodiment of the present invention, FIG. 15 is a view for explaining a method of implementing the touch electrode structure according to the second embodiment of the present invention. Referring to FIG.

In the self-touch sensing method according to the second embodiment of the present invention, only one touch sensor (hereinafter, the touch sensor is described as a touch electrode for convenience of explanation) is sensed at a time through the SSU existing in the integrated driving circuit And J (J is an integer equal to or greater than 2) touch electrodes at the same time. When the self-touch sensing method according to the second embodiment of the present invention is used, the number of LHB sections can be reduced.

As shown in FIGS. 13 and 14, the first through third sensing lines L1 through L3 are electrically connected to at least one odd-numbered touch electrode CSO through an odd-numbered via hole VHO. The first to third sensing lines L 1 to L 3 sense the odd-numbered touch electrodes CSO and are referred to as odd-numbered electrode sensing lines L 1 to L 3 for convenience of explanation.

The fourth through sixth sensing lines L4 through L6 are electrically connected to at least one even-numbered touch electrode CSE through the even-numbered via hole VHE. The fourth to sixth sensing lines L4 to L6 sense the even-numbered touch electrodes CSE and are referred to as even-numbered electrode sensing lines L4 to L6 for convenience of explanation.

Only three odd-numbered electrode sensing lines (L1 to L3) and even-numbered electrode sensing lines (L4 to L6) are shown. However, the present invention is not limited to this, as it depends on the design method, such as the number of touch electrodes arranged in the vertical direction of the touch screen TSP and the number of channels of the integrated driver circuit. That is, the odd-numbered electrode sensing lines L1 to L3 and the even-numbered electrode sensing lines L4 to L6 are wired to K (K is an integer of 3 or more).

The odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE may be patterned in a rectangular, polygonal, oval or circular shape. Hereinafter, for convenience of explanation, the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are patterned in a quadrangle will be described as an example.

The odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are arranged so as not to be arranged on the same line but to be vertically staggered so as to be on different lines. The odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are arranged so as to be shifted up and down by a size (or height in the vertical direction) defining one touch electrode before the electrodes are integrated into one as shown in FIG. 13, The touch electrodes are arranged to be shifted up and down by the size of the two touch electrodes. That is, the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE may be arranged so that at least some regions overlap each other.

Although the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are staggered up and down in the drawing, the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE may appear to be staggered have.

In the first embodiment, as shown in FIG. 15A, the structure in which the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are arranged on the same line is used. In contrast, in the second embodiment, the odd-numbered touch electrodes CSO and the odd-numbered touch electrodes CS0 and CS2 are formed in a pattern in which at least two vertically adjacent touch electrodes CSO1, CSO2 or CSE1 and CSE2 are integrated into one pattern as shown in FIG. And at least some regions of the even-numbered touch electrodes CSE are arranged so as to be offset up and down.

Although FIG. 15 is shown as an example for arranging the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE in such a manner that at least some regions of the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are staggered vertically, the present invention is not limited thereto.

If at least some regions of the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are arranged so as to be offset in the vertical direction as described above, the sensing value sensed through each line by the touch algorithm can be weighted by a weighted average or weighted Can be easily separated.

The display device having the structure of the touch electrode and the sensing line as in the second embodiment of the present invention can lower the touch raw data value acquired through the sensing lines in the structure to less than half of the conventional structure. However, it is possible to easily distinguish a touch point by a weighted average of the peripheral touch electrodes or other algorithms such as an interpolation method.

Hereinafter, an example of the self-touch sensing method according to the second embodiment of the present invention and the single-touch and multi-touch detection using the same will be described.

16 is a flowchart for explaining a self-touch sensing method according to a second embodiment of the present invention, and FIGS. 17 to 18 are illustrations of a touch detection method using the first embodiment of the present invention.

As shown in FIG. 16, the self-touch sensing method according to the second embodiment of the present invention is used in a display device having a structure of a touch electrode and a sensing line configured as shown in FIG. 13 or FIG.

The step S210 of detecting the intensity of the electrostatic capacitance for each of the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE is performed through the odd-numbered electrode sensing lines L1 to L3 and the even-numbered electrode sensing lines L4 to L6, At the same time or separately, and detecting the intensity of electrostatic capacitance for each electrode from them.

The comparison of the capacitances of the electrodes and the step of detecting the largest electrode (S220) compares the capacitances detected from the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE and determines the largest electrode And a step of detecting the electrode. The largest capacitance is defined as the center coordinate of the touch point.

When the capacitances detected from the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are compared, if there is no electrode having the largest capacitance, it is regarded as a non-touch corresponding to the touch, Are excluded.

The step S230 of calculating the weighted average of the horizontal lines may be performed on the basis of the electrode having the largest capacitance among the capacitances detected from the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE, And weighting the electrodes.

At this stage, (+, plus) weights are given to the electrostatic capacitances of the A (A is an integer of 2 or more) touch electrodes adjacent to the right side with respect to the electrode having the largest capacitance. On the other hand, (-, minus) weights are given to the electrostatic capacitances of the A touch electrodes adjacent to the left side based on the electrode having the largest capacitance. On the other hand, in this step, (-) weights may be given to the capacitance of the touch electrode adjacent to the right side of the electrode having the largest capacitance, and a (+) weight value may be given to the capacitance of the touch electrode adjacent to the left side .

The step of calculating a weighted average of the vertical lines S240 may include calculating a weighted average of the upper and lower sides of the electrode having the largest electrostatic capacity among the electrostatic capacities detected from the odd-numbered touch electrodes CSO and the even- And weighting the electrodes.

In this step, (+) weights are given to the electrostatic capacitances of the A touch electrodes adjacent to the upper side with reference to the electrode having the largest capacitance. On the other hand, (-) weights are given to the electrostatic capacitances of the A touch electrodes adjacent to the lower side based on the electrode having the largest capacitance. On the other hand, in this step, (-) weights may be given to the capacitance of the touch electrode adjacent to the upper side with respect to the electrode having the largest capacitance, and (+) weights may be given to the capacitance of the touch electrode adjacent to the lower side .

When the weighted average of the horizontal line is calculated in step S230 and the weighted average of the vertical line is calculated in step S240, the peripheral portion of the largest touch point (peripheral touch electrode) It is possible to derive (calculate) in which direction the center coordinate is more biased by adding or subtracting the weighted average to the capacity value.

The step of calculating the movement coordinates after applying the respective weights (S250) determines whether the touch points are further shifted in the direction with respect to the center coordinates, and then calculates each of the weights calculated in the previous step, Applied to electrodes.

The step S260 of converting the touch point according to the resolution of the display device is a step of converting the touch point detected from the touch screen to a resolution of the display device. The conversion to the resolution of the display (Display) uses a conventional method.

In the second embodiment of the present invention, the touch point can be detected using the above touch detection method. Reference is now made to Figs. 16-18.

17 represents the number of the SSU (AFE), the portion indicated by "TP" represents the touch point, and Fig. 18 represents the touch point of the touch screen (TSP) Quot; TP "area and a value obtained by digitizing the electrostatic capacitance value obtained by the calculation of the capacitance value.

Since the odd-numbered touch electrodes CSO and the even-numbered touch electrodes CSE are arranged so as to be offset up and down, the capacitance value (touch data value) is read for each electrode, Cancelation, and then proceed with binarization. In this case, among the electrostatic capacitance values (touch data values) detected for each electrode, values below the threshold value are all excluded and only the threshold value or more is used for touch point detection.

(S230, S240) of calculating the weighted average of the horizontal and vertical lines in order to detect the accurate touch coordinates in the touch screen (TSP) during the binarization, the peripheral portion (peripheral touch electrode) centered on the largest touch point The position of the center coordinate can be derived (calculated) by adding or subtracting the weighted average to the capacitance value.

The weighted average is added to or subtracted from the electrostatic capacity value of the peripheral touch electrode around i which is the largest touch point 5278 among "f, g, i, k, l" of the "TP" (Calculated) of the position of the light source is described by the following mathematical expression. In the following mathematical expression, x means the abscissa and y means the ordinate.

If appropriate coefficients are added based on the calculated weights 168 and 96 as shown in the above equation, it is possible to extract the coordinates of the touch point corresponding to the resolution of the display device.

In the above description, the touch screen is structured in the same manner as the second embodiment of the present invention, and only one example of a method for algorithmically separating the touch screen and detecting touch points is described. Therefore, the present invention is not limited thereto.

FIG. 19 is a view for explaining the difference between the conventional self-touch sensing method and the self-touch sensing method according to the present invention.

As shown in FIG. 19A, the structure proposed in the related art designs the touch screen driving circuits 30aL and 30aR so as to have thirty SSUs (30EA SSU) for sensing 30 touch electrodes, for example. This is because the self-touch sensing method proposed in the prior art takes a structure in which the SSU included in the touch screen driving circuits 30aL and 30aR of the integrated driving circuit 50a senses one touch electrode.

As shown in FIG. 19B, the structure of the present invention designs the touch screen driving circuits 30aL and 30aR so as to have 15 SSUs (15EA SSUs) for sensing 30 touch electrodes, for example. This is because the SSU included in the touch screen driving circuits 30aL and 30aR of the integrated driving circuit 50a senses at least two touch electrodes in the self-touch sensing method according to the present invention.

Therefore, the self-touch sensing method according to the present invention has a structure in which the touch electrode and the sensing line are connected by J (J is an integer of 2 or more): 1, thereby overcoming the limitations of IC fabrication, wiring routing, And the manufacturing cost can be reduced.

Meanwhile, in the description of the present invention, touch electrodes disposed immediately adjacent to each other in the diagonal direction as well as vertically, horizontally, and rightwardly disposed adjacent to the touch electrodes may also include adjacent touch electrodes. The odd-numbered touch electrode and the odd-numbered touch electrode adjacent to the odd-numbered touch electrode may be referred to as a first touch electrode and a third touch electrode. The even-numbered touch electrode and the even- 4 < / RTI > touch electrode. The odd and even electrode sensing lines connected to the odd and even touch electrodes may be referred to as a first sensing line and a second sensing line. The first sensing line and the second sensing line may be disposed adjacent to each other or may not be disposed adjacent to each other.

As described above, the present invention provides a touch screen driver circuit (Read Out IC) capable of reducing a touch channel for sensing a touch electrode to less than half of the conventional technology. Further, since the present invention can sense multi-channels at a time, the number of SSU (Self Sensing Unit) blocks of the touch screen driving circuit can be reduced, thereby achieving cost reduction (CI) There is an effect that can be done. In addition, since the present invention can overcome limitations of the chip size, it is possible to easily implement a high-resolution and large-area in-cell touch screen. In addition, since the multi-sensing channel can be further increased when a low-cost or low-cost product which does not require much touch performance is used, the present invention can be advantageously applied to products requiring chip size reduction. Further, when the number of SSUs of the touch screen driving circuit is maintained as it is, the present invention can reduce the touch sensing time to less than half and enlarge the touch screen to a high resolution model. In addition, when the display panel is enlarged, the present invention has the effect of causing limitations such as IC fabrication, wiring routing and adhering process, as well as inducing an increase in manufacturing cost.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be practiced. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. In addition, the scope of the present invention is indicated by the following claims rather than the detailed description. Also, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

20: timing controller 12: data driving circuit
14: scan drive circuit DIS: liquid crystal display panel
TSP: Touch screen 30: Touch screen drive circuit
50a to 50d: integrated driving circuit COM: common electrode
L1 to L3: odd-numbered electrode sensing line VHO: odd-numbered via hole
CSO: odd-numbered touch electrodes L4 to L6: fourth to sixth sensing lines
VHE: Even-numbered via hole CSE: Even-numbered touch electrode

Claims (16)

A channel connected to a first sensing line for sensing a first touch electrode and a third touch electrode adjacent to the first touch electrode and a second sensing electrode for sensing a second touch electrode and a fourth touch electrode not adjacent to the second touch electrode, A multiplexer having a channel coupled to the second sensing line; And
And a touch sensor controller for sensing the first touch electrode and the third touch electrode at the same time, sensing the second touch electrode and the fourth touch electrode at the same time, and detecting the capacitance, by driving the multiplexer in a time- . The method according to claim 1,
The sensing circuit of the touch sensor control unit
A driving circuit for simultaneously sensing J (J is an integer of 2 or more) touch electrodes through a sensing line. A display panel having a plurality of touch electrodes;
A plurality of sensing lines electrically connected to the plurality of touch electrodes; And
And a touch screen driving circuit for detecting a change amount of capacitance of the touch electrodes through the plurality of sensing lines,
Wherein at least one first sensing line of the plurality of sensing lines is electrically connected to a first touch electrode and a third touch electrode adjacent to the first touch electrode,
Wherein at least one second sensing line of the plurality of sensing lines is electrically connected to a second touch electrode and a fourth touch electrode not adjacent to the second touch electrode. The method of claim 3,
The first touch electrode and the third touch electrode are continuously arranged in the vertical direction,
Wherein the second touch electrode and the fourth touch electrode are disposed discontinuously on the upper and lower sides. The method of claim 3,
The display panel
First via holes electrically connecting the first touch electrode and the third touch electrode,
And second via holes electrically connecting the second touch electrode and the fourth touch electrode. The method of claim 3,
The sensing circuit of the touch screen driver circuit
And J (J is an integer equal to or larger than two) touch electrodes simultaneously through a sensing line. A first sensing line for sensing the first touch electrode and a third touch electrode adjacent to the first touch electrode and a second sensing line for sensing the second touch electrode and a fourth touch electrode not adjacent to the second touch electrode, A method of driving a display device including a display panel,
Sensing the first touch electrode and the third touch electrode through the first sensing line and sensing the second touch electrode and the fourth touch electrode through the second sensing line, Detecting an intensity of the light;
Determining whether an intensity of a capacitance detected from the first and third touch electrodes and the second and fourth touch electrodes is higher than an internally set threshold voltage level;
Separating the intensity of the electrostatic capacitance detected from the first and third touch electrodes and the intensity of the electrostatic capacitance detected from the second and fourth touch electrodes, respectively; And
And comparing the capacitance values detected from the first and third touch electrodes to calculate a touch point. 8. The method of claim 7,
The step of calculating the touch point
A first touch electrode and a second touch electrode are disposed on the first touch electrode and the second touch electrode, respectively, and a weight is assigned to each of the first and third touch electrodes based on the electrostatic capacitance value detected from the second and fourth touch electrodes, And determining in which direction the second and fourth touch electrodes are closer to each other. A multiplexer having a channel connected to the first touch electrodes and a channel connected to the second touch electrodes staggered to be positioned on different lines from the first touch electrodes; And
And a touch sensor controller for driving the multiplexer by time division to compare the capacitances detected from the first touch electrodes and the second touch electrodes and defining the largest capacitance among them as the center coordinates of the touch point, . 10. The method of claim 9,
The touch sensor control unit
(A is an integer equal to or greater than 2) touch electrodes adjacent to the upper, lower, left, and right sides of the electrode having the largest capacitance. A display panel having a plurality of touch electrodes staggered so that the first touch electrodes and the second touch electrodes are positioned on different lines;
A plurality of sensing lines electrically connected to the plurality of touch electrodes; And
And a touch screen driving circuit for detecting a change amount of capacitance of the touch electrodes through the plurality of sensing lines,
Wherein at least one first sensing line of the plurality of sensing lines is electrically connected to the first touch electrodes,
Wherein at least one second sensing line of the plurality of sensing lines is electrically connected to the second touch electrodes. 12. The method of claim 11,
The first touch electrodes and the second touch electrodes
Wherein at least some of the regions overlap each other. 12. The method of claim 11,
The touch screen driving circuit
And a touch sensor controller for comparing the capacitances detected from the first touch electrodes and the second touch electrodes and defining the largest capacitance among the capacitances as center coordinates of the touch point. 14. The method of claim 13,
The touch screen driving circuit
(A is an integer of two or more) touch electrodes adjacent to upper, lower, left, and right based on the electrode having the largest capacitance. And a display panel having a first sensing line connected to the first touch electrodes and a second sensing line connected to the second touch electrodes staggered to be positioned on different lines from the first touch electrodes, In the method,
Sensing the first touch electrodes and the second touch electrodes through the first sensing line and the second sensing line, and detecting intensity of electrostatic capacitance per electrode from the first touch line and the second sensing line;
Comparing the capacitances detected from the first touch electrodes and the second touch electrodes and defining the largest capacitance among the capacitances as the center coordinates of the touch point. 16. The method of claim 15,
The step of defining the coordinates of the center of the touch point
Applying a weight to the electrostatic capacitances of the A (A is an integer equal to or larger than two) touch electrodes adjacent to the upper, lower, left, and right sides of the electrode having the largest capacitance.

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