Apparatus for Sensing Touch and Device for Driving Touch Display Including the same

Abstract

A touch sensing device according to an embodiment of the present invention, which drives a plurality of touch sensors, is characterized by including a control unit that calculates the area of ​​a touch region, the intensity of touch sensitivity, and the uniformity of touch sensitivity using a sensing signal input from the plurality of touch sensors, and classifies whether a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of touch sensitivity, and the uniformity of touch sensitivity.

Description

Technology Field

[0001] This specification relates to a touch sensing device and a touch display driving device including the same. Background Technology

[0002] Representative display devices for displaying images include Liquid Crystal Displays (LCDs) using liquid crystals and Organic Light Emitting Diode (OLED) displays using organic light-emitting diodes.

[0003] Recently, display devices equipped with a touch screen panel capable of detecting touch input by a user's finger or stylus pen, departing from conventional input methods such as buttons, keyboards, and mice (hereinafter referred to as "touch display devices") are widely used. The above-described touch display devices include touch sensing devices.

[0004] That is, the touch display device may include a display driving device that drives the display device and a touch sensing device that detects whether a touch is present and touch coordinates (or touch locations). Specifically, the touch sensing device drives touch sensors (or touch electrodes) to detect touch sensing data and uses the detected touch sensing data to detect touch information including whether a touch is present or touch coordinates. The problem to be solved

[0005] The technical objective of the present invention is to provide a touch sensing device that prevents malfunction of a touch display panel and a touch display driving device including the same. means of solving the problem

[0006] A touch sensing device according to an embodiment of the present invention, which drives a plurality of touch sensors, is characterized by including a control unit that calculates the area of ​​a touch region, the intensity of touch sensitivity, and the uniformity of touch sensitivity using a sensing signal input from the plurality of touch sensors, and classifies whether a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of touch sensitivity, and the uniformity of touch sensitivity. Effects of the invention

[0007] The touch sensing device and touch sensing method according to the present invention can prevent malfunction of the touch display device and touch sensing device caused by touch input from a conductive material, such as water or a coin, which is unintended by the user.

[0008] The touch sensing device and touch sensing method according to the present invention are driven in different driving modes depending on the touch situation, so that touch input can be received more accurately for each touch situation. Brief explanation of the drawing

[0009] FIG. 1 is a drawing showing a display system to which a touch sensing device according to one embodiment of the present invention is applied. Figure 2 is a diagram showing signals transmitted and received between a touch sensing device and a touch screen panel according to the mutual capacitance method. Figure 3 is a diagram showing signals transmitted and received between a touch sensing device and a touch screen panel according to the magnetic capacitance method. FIG. 4 is a block diagram schematically showing the configuration of the touch sensing device illustrated in FIG. 1 to FIG. 3. FIG. 5 is a diagram showing a decision tree of a learning model according to one embodiment of the present invention. Figures 6a and 6b are the input signal results when determined to be a normal touch. Figures 7a to 7c show the input signal results when determined to be an abnormal touch. FIG. 8 is a diagram showing a first driving signal and a second driving signal transmitted by a first magnetic sensing mode according to an embodiment of the present invention. FIGS. 9a and 9b are drawings showing a first driving signal and a second driving signal transmitted by a second magnetic sensing mode according to an embodiment of the present invention. Specific details for implementing the invention

[0010] Throughout the specification, identical reference numbers denote substantially identical components. In the following description, detailed descriptions of components and functions known in the art may be omitted if they are not related to the core components of the invention. The meanings of the terms described in this specification should be understood as follows.

[0011] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0012] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and therefore the present invention is not limited to the depicted details. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing the present invention, if it is determined that a detailed description of related known technology may unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0013] Where terms such as 'comprising,' 'having,' 'consisting of,' etc. are used in this specification, other parts may be added unless 'only' is used. Where a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise.

[0014] In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement.

[0015] In the case of an explanation of a temporal relationship, for example, when a temporal sequence is explained using 'after', 'following', 'next', 'before', etc., it may include cases where the sequence is not continuous unless 'immediately' or 'directly' is used.

[0016] Although terms such as "first," "second," etc. are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the technical scope of the present invention.

[0017] The term “at least one” should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of “at least one of the first item, the second item and the third item” may mean not only the first item, the second item or the third item individually, but also all combinations of items that can be presented from two or more of the first item, the second item and the third item.

[0018] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0020] Hereinafter, embodiments of the present specification will be described in detail with reference to the attached drawings.

[0021] FIG. 1 is a drawing showing a touch display device to which a touch sensing device according to one embodiment of the present invention is applied.

[0022] As illustrated in FIG. 1, the touch display device (100) includes a display panel (110) and a touch display driver, and the touch display driver includes a gate driver (120), a data driver (130), a timing controller (140), a host system (150), and a touch sensing device (160).

[0023] The display panel (110) includes a plurality of gate lines (G1~Gn) and a plurality of data lines (D1~Dm) that are arranged in an intersecting manner to define a plurality of pixel regions, and a pixel (P) provided in each of the plurality of pixel regions. The plurality of gate lines (G1~Gn) may be extended in the horizontal direction and the plurality of data lines (D1~Dm) may be extended in the vertical direction, but are not necessarily limited thereto.

[0024] In one embodiment, the display panel (110) may be a liquid crystal display (LCD) panel. When the display panel (110) is a liquid crystal display panel, the display panel (110) includes a thin film transistor (TFT) formed in a pixel area defined by a plurality of gate lines (G1~Gn) and a plurality of data lines (D1~Dm), and liquid crystal cells connected to the thin film transistor (TFT).

[0025] The thin-film transistor (TFT) supplies a source signal supplied through data lines (D1~Dm) to the liquid crystal cell in response to a scan pulse supplied through gate lines (G1~Gn).

[0026] Since a liquid crystal cell consists of a common electrode facing a liquid crystal and a subpixel electrode connected to a thin-film transistor (TFT), it can be equivalently represented as a liquid crystal capacitor (Clc). Such a liquid crystal cell includes a storage capacitor (Cst) connected to the previous gate line to maintain the voltage corresponding to the source signal charged in the liquid crystal capacitor (Clc) until the voltage corresponding to the next source signal is charged.

[0027] Meanwhile, the pixel area of ​​the display panel (110) may be composed of red (R), green (G), blue (B), and white (W) subpixels. In one embodiment, each subpixel may be formed repeatedly in a row direction or formed in a 2*2 matrix form. At this time, a color filter corresponding to each color is placed in each of the red (R), green (G), and blue (B) subpixels, whereas a separate color filter is not placed in the white (W) subpixel. In one embodiment, the red (R), green (G), blue (B), and white (W) subpixels may be formed to have the same area ratio, but the red (R), green (G), blue (B), and white (W) subpixels may be formed to have different area ratios.

[0028] In the above-described embodiment, the display panel (110) is described as being a liquid crystal display panel, but in other embodiments, the display panel (110) may be an organic light-emitting display (OLED) panel.

[0029] The gate driver (120) includes a shift register that sequentially generates scan pulses, i.e., gate high pulses, according to a gate control signal (GCS) from a timing controller (140). In response to these scan pulses, the thin-film transistor (TFT) is turned on.

[0030] The gate driver (120) may be positioned on one side of the display panel (110), for example, the left side, as illustrated, but in some cases, it may be positioned on both sides of the display panel (110) facing each other, for example, the left and the right sides. The gate driver (120) may include a plurality of gate driver integrated circuits (not shown). The gate driver (120) may be formed in the form of a tape carrier package on which the gate driver ICs are mounted, but is not necessarily limited thereto, and the gate driver ICs may be mounted directly on the display panel (110).

[0031] The data driver (130) converts a digital video signal (RGB') transmitted from the timing controller (140) into an analog source signal and outputs it to the display panel (110). Specifically, the data driver (130) outputs the analog source signal to the data lines (D1~Dm) in response to a data control signal (DCS) transmitted from the timing controller (140).

[0032] The data driver (130) may be positioned on one side of the display panel (110), for example, on the upper side, but in some cases, it may be positioned on both sides of the display panel (110) facing each other, for example, on both the upper and lower sides. Additionally, the data driver (130) may be formed in the form of a tape carrier package on which a source driver IC is mounted, but is not necessarily limited thereto.

[0033] In one embodiment, the data driving unit (130) may include a plurality of source driver ICs (not shown) that convert a digital video signal transmitted from a timing controller (140) into an analog source signal and output it to a display panel (110).

[0034] The timing controller (140) receives various timing signals from the host system (150), including a vertical synchronization signal (Vsync), a horizontal synchronization signal (Hsync), a data enable (DE) signal, and a clock signal (CLK), and generates a data control signal (DCS) for controlling the data driver (130) and a gate control signal (GCS) for controlling the gate driver (120). Additionally, the timing controller (140) receives an image signal (RGB) from the host system (150), converts it into an image signal (RGB') that can be processed by the data driver (130), and outputs it.

[0035] In one embodiment, the data control signal (DCS) may include a source start pulse (SSP), a source sampling clock (SSC), and a source output enable signal (SOE), and the gate control signal (GCS) may include a gate start pulse (GSP), a gate shift clock (GSC), and a gate output enable signal (GOE).

[0036] Here, the source start pulse controls the data sampling start timing of a plurality of source drive ICs (not shown) constituting the data driving unit (130). The source sampling clock is a clock signal that controls the data sampling timing of each source drive IC. The source output enable signal controls the output timing of each source drive IC.

[0037] The gate start pulse controls the operation start timing of a plurality of gate drive ICs (not shown) constituting the gate drive unit (120). The gate shift clock is a clock signal commonly input to one or more gate drive ICs and controls the shift timing of the scan signal (gate pulse). The gate output enable signal specifies the timing information of one or more gate driver ICs.

[0038] The host system (150) can be implemented as any one of a navigation system, a set-top box, a DVD player, a Blu-ray player, a personal computer (PC), a home theater system, a broadcast receiver, or a phone system. The host system (150) includes a System On Chip (SoC) with a built-in scaler and converts the digital video signal (RGB) of the input video into a format suitable for display on the display panel (110). The host system (150) transmits the digital video signal (RGB) and timing signals to the timing controller (140). Additionally, the host system (150) analyzes the touch coordinates (X,Y) input from the touch sensing device (160) to output the touch coordinates in the form of lines on the display panel (110) or executes an application associated with the coordinates where the touch occurred by the user.

[0039] A touch screen panel (TSP) receives touch input from a user, and the touch screen panel (TSP) can be implemented in a form embedded in a display panel (110). For example, the touch screen panel (TSP) can be placed on the display panel (110) in an on-cell type or an in-cell type. That is, the touch screen panel (TSP) may include a plurality of touch sensors placed in an on-cell type or an in-cell type.

[0040] The touch sensing device (160) senses a touch occurring on a touch screen panel (TSP) through a touch sensor. The touch sensing device (160) can drive the touch screen panel (TSP) according to mutual capacitance and magnetic capacitance methods to calculate whether a touch is present and the touch coordinates.

[0042] Hereinafter, a touch sensing device according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 9b.

[0043] FIG. 5 is a diagram showing a decision tree of a learning model according to an embodiment of the present invention. FIG. 6a and FIG. 6b are input signal results when determined to be a normal touch. FIG. 7a to FIG. 7c are input signal results when determined to be an abnormal touch. FIG. 8 is a diagram showing a first driving signal and a second driving signal transmitted by a first magnetic sensing mode according to an embodiment of the present invention. FIG. 9a and FIG. 9b are diagrams showing a first driving signal and a second driving signal transmitted by a second magnetic sensing mode according to an embodiment of the present invention.

[0044] As illustrated in FIGS. 2 and 3, the touch screen panel (TSP) may include touch driving electrodes (TXE) extended along a first direction (X) and touch sensing electrodes (RXE) extended along a second direction (Y) perpendicular to the first direction (X). In this case, a plurality of touch driving electrodes (TXE) and touch sensing electrodes (RXE) may be arranged to intersect and overlap each other.

[0045] A touch sensing device (160) receives a touch generated on a touch screen panel (TSP). The touch sensing device (160) can be driven according to a mutual capacitance method and a magnetic capacitance method to calculate touch coordinates. Specifically, as shown in FIG. 2, the touch sensing device (160) is driven in a mutual sensing mode (MSM) according to the mutual capacitance method to supply a touch driving signal (TXS) to touch driving electrodes (TXE) and can receive a mutual sensing signal (RXS_M) from touch sensing electrodes (RXE) coupled with touch driving electrodes (TXE). Additionally, as illustrated in FIG. 3, the touch sensing device (160) is driven in a first magnetic sensing mode (SSM1) or a second magnetic sensing mode (SSM2) according to a magnetic capacitance method to supply a driving signal (TXS) to touch driving electrodes (TXE) and touch sensing electrodes (RXE), and can receive a magnetic sensing signal (RXS_S) for each supplied driving signal (TXS).

[0046] According to one embodiment of the present invention, the touch sensing device (160) may be driven using different driving modes depending on the touch situation. Specifically, in the case of a normal touch situation, the touch sensing device (160) is driven in a mutual sensing mode (MSM) and a first magnetic sensing mode (SSM1), and in the case of an abnormal touch situation, the touch sensing device (160) may be driven in a mutual sensing mode (MSM) and a second magnetic sensing mode (SSM2).

[0047] The touch sensing device (160) can calculate touch coordinates (X,Y) using at least one of a mutual sensing signal (RXS_M) input by a mutual sensing mode (MSM), a first magnetic sensing signal (RXS_S1) input by a first magnetic sensing mode (SSM1), or a second magnetic sensing signal (RXS_S2) input by a second magnetic sensing mode (SSM2).

[0048] The touch sensing device (160) includes a control unit (210), a first driving unit (220), and a second driving unit (230).

[0049] The control unit (210) calculates touch coordinates using mutual sensing signals (RXS_M) and magnetic sensing signals (RXS_S) input to the first driving unit (220) and the second driving unit (230). The control unit (210) determines a touch situation using at least one of the magnetic sensing signals (RXS_S) input to the first and second driving units (220, 230) or the mutual sensing signals (RXS_M) input to the second driving unit (230), and determines the driving mode of the first driving unit (220) and the second driving unit (230) according to the determined touch situation. To this end, the control unit (210) includes a driving mode determination unit (211), a touch coordinate calculation unit (212), and a touch controller (213).

[0050] The driving mode determining unit (211) determines whether the situation is a normal touch situation caused by a user or an abnormal touch situation caused by an unintended cause such as water or a coin, by using at least one of the magnetic sensing signal (RXS_S) input to the first and second driving units (220, 230) or the mutual sensing signal (RXS_M) input to the second driving unit (230).

[0051] According to one embodiment of the present invention, the driving mode determining unit (211) includes a touch discrimination model learned using at least one of a magnetic sensing signal (RXS_S) input to the first and second driving units (220, 230) or a mutual sensing signal (RXS_M) input to the second driving unit (230).

[0052] According to one embodiment of the present invention, the touch discrimination model is a learning model of a decision tree structure, which is a type of decision support tool that diagrams decision rules and results therefrom in a tree structure, and classifies whether a sensing signal is a normal touch situation or an abnormal touch situation. Specifically, the touch discrimination model classifies whether a sensing signal is a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity. Specifically, the touch discrimination model determines a touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity for at least one of a magnetic sensing signal (RXS_S) input to the first and second driving units (220, 230) or a mutual sensing signal (RXS_M) input to the second driving unit (230). To this end, the touch discrimination model is trained to classify whether a plurality of sensing signals are a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity. Specifically, the touch discrimination model can determine whether a sensing signal is a normal touch situation or an abnormal touch situation by calculating a threshold area (CV) that serves as a standard for the area of ​​the touch region, a first threshold (CV1) and a second threshold (CV2) that serve as standards for the intensity of the touch sensitivity, and a third threshold (CV3) and a fourth threshold (CV4) that serve as standards for the uniformity of the touch sensitivity through learning, based on the threshold area (CA) and the first to fourth thresholds (CV1, CV2, CV3, CV4).

[0053] The touch discrimination model is trained to classify touch situations based on the touch area of ​​the sensing signal. Specifically, the touch discrimination model can be trained to calculate the touch area, which is the area of ​​the touch sensor where the sensing signal is input, and to classify cases where the calculated touch area is larger than or smaller than the threshold area (CA) calculated through learning.

[0054] Subsequently, the touch discrimination model is trained to classify touch situations based on the intensity of the touch sensitivity of the sensing signal. At this time, the intensity of the touch sensitivity can be calculated using the signal value of the sensing signal having the maximum value located within the touch area, the number of sensing signals corresponding to the touch area that are greater than or equal to a specific signal value, and the average signal value of the sensing signals corresponding to the touch area that are greater than or equal to a specific signal value. However, this is not limited thereto, and the intensity of the touch sensitivity can be calculated in various ways using the sensing signal.

[0055] The touch discrimination model can determine a touch situation by comparing the strength of the calculated touch sensitivity with a first threshold value (CV1) and a second threshold value (CV2) calculated through learning. Specifically, the touch discrimination model can determine a touch situation by comparing the strength of the touch sensitivity of the sensing signal with the first threshold value (CV1) when the touch area is smaller than the threshold area (CA), and can determine a touch situation by comparing the strength of the touch sensitivity of the sensing signal with the second threshold value (CV2) when the touch area is larger than the threshold area (CA). At this time, the first threshold value (CV1) may have a different value from the second threshold value (CV2), or they may have the same value.

[0056] For a sensing signal, if the touch area is classified as being smaller than the threshold area (CA) and the intensity of the touch sensitivity is greater than the first threshold value (CV1), the touch discrimination model can be trained to determine that the sensing signal is a normal touch situation. For example, as shown in FIG. 6a, the touch discrimination model can be trained to determine that the sensing signals sensed as a single finger touches are a normal touch situation. Additionally, as shown in FIG. 6b, the touch discrimination model can be trained to determine that at least some of the sensing signals sensed as multiple fingers touch are a normal touch situation.

[0057] For a sensing signal, if the touch area is classified as being larger than the threshold area (CA) and the intensity of the touch sensitivity is greater than the second threshold (CV2), the touch discrimination model can be trained to determine that the sensing signal is a normal touch situation. For example, as illustrated in FIG. 6b, the touch discrimination model can be trained to determine that at least some of the sensing signals sensed as multiple fingers touch are normal touch situations.

[0058] When a sense signal is classified as having a touch area smaller than a threshold area (CA) and a touch sensitivity intensity smaller than a first threshold (CV1), the sense signal discrimination model is trained to classify the touch situation based on the uniformity of the sense signal. At this time, the uniformity of the sense signal can be calculated using the ratio of positive or negative signal values ​​of the sense signal, the number of sense signals having positive signal values, the number of sense signals having negative signal values, the rate of change of the sense signal corresponding to the sense area, and the signal value of the sense signal output from a sense sensor located close to the sense signal having a maximum value. However, this is not limited thereto, and the uniformity of the sense signal can be calculated in various ways using the sense signal.

[0059] The touch discrimination model can determine a touch situation by comparing the uniformity of the calculated touch sensitivity with the third threshold value (CV3) and the fourth threshold value (CV4) calculated through learning. Specifically, the touch discrimination model can determine a touch situation by comparing the uniformity of the touch sensitivity with the third threshold value (CV3) when the touch area of ​​the sensing signal is smaller than the threshold area (CA) and the intensity of the touch sensitivity is smaller than the first threshold value (CV1); and can determine a touch situation by comparing the uniformity of the touch sensitivity with the fourth threshold value (CV4) when the touch area is larger than the threshold area (CA) and the intensity of the touch sensitivity is smaller than the second threshold value (CV2). At this time, the first threshold value (CV1) may have a different value from the second threshold value (CV2), or they may have the same value.

[0060] For a sensing signal, if the touch area is classified as being smaller than the threshold area (CA), the intensity of the touch sensitivity is lower than the first threshold (CV1), and the touch uniformity is higher than the third threshold (CV3), the touch discrimination model can be trained to determine that the sensing signal is a normal touch situation. For example, as illustrated in FIG. 6b, the touch discrimination model can be trained to determine that at least some of the sensing signals sensed as multiple fingers touch are normal touch situations.

[0061] On the other hand, if a sense signal is classified as having a touch area smaller than a threshold area (CA), a touch sensitivity intensity lower than a first threshold (CV1), and a touch uniformity lower than a third threshold (CV3), the sense signal can be trained to determine that the sense signal is an abnormal touch situation. For example, the sense signal can be trained to determine that sense signals sensed by a cable are an abnormal touch situation, as shown in FIG. 7a. Additionally, the sense signal can be trained to determine that sense signals sensed by water are an abnormal touch situation, as shown in FIG. 7b.

[0062] For a sensing signal, if the touch area is classified as being larger than the threshold area (CA), the intensity of the touch sensitivity is lower than the second threshold (CV2), and the touch uniformity is higher than the fourth threshold (CV4), the touch discrimination model can be trained to determine that the sensing signal is a normal touch situation. For example, as illustrated in FIG. 6b, the touch discrimination model can be trained to determine that at least some of the sensing signals sensed as multiple fingers touch are normal touch situations.

[0063] On the other hand, if a sense signal is classified as having a touch area larger than a threshold area (CV), a touch sensitivity intensity lower than a second threshold (CV2), and a touch uniformity lower than a fourth threshold (CV4), the sense signal can be trained to determine that the sense signal is an abnormal touch situation. For example, as illustrated in FIG. 7c, the sense signal sensed by a coin can be trained to determine that the sense signals are an abnormal touch situation.

[0064] Additionally, the driving mode determining unit (211) may determine to drive the first driving unit (220) and the second driving unit (230) in a first magnetic sensing mode (SSM1) or a second magnetic sensing mode (SSM2) depending on the determined touch situation. Specifically, if it is determined to be a normal touch situation, the driving mode determining unit (211) may determine to drive the first driving unit (220) and the second driving unit (230) in the first magnetic sensing mode (SSM1), and if it is determined to be an abnormal touch situation, the driving mode determining unit (211) may determine to drive the first driving unit (220) and the second driving unit (230) in the second magnetic sensing mode (SSM2). Accordingly, touches caused by unintended factors such as water or coins are prevented from being input as normal touches, and normal touches by the user can be input more accurately.

[0065] In a normal touch situation, the first magnetic sensing signal (RXS_S1) input according to the first magnetic sensing mode (SSM1) may have improved touch input accuracy by minimizing noise caused by the retransmission signal in the LGM (Low Ground Mass) state, in particular. On the other hand, the second magnetic sensing signal (RXS_S2) may have reduced touch input accuracy due to noise caused by the retransmission signal in the LGM (Low Ground Mass) state, in particular. In an abnormal touch situation caused by water, the first magnetic sensing signal (RXS_S1) input according to the first magnetic sensing mode (SSM1) may have reduced touch input accuracy by including a sensing signal corresponding to an untouched area. On the other hand, the second magnetic sensing signal (RXS_S2) input according to the second magnetic sensing mode (SSM2) may have improved touch input accuracy by not including a sensing signal corresponding to the abnormal touch caused by water. Accordingly, the driving mode determining unit (211) according to one embodiment of the present invention drives the first driving unit (220) and the second driving unit (230) in a first magnetic sensing mode (SSM1) when there is a normal touch situation, and drives the first driving unit (220) and the second driving unit (230) in a second magnetic sensing mode (SSM2) when there is an abnormal touch situation, thereby improving the accuracy of the touch input according to the touch situation.

[0066] Referring again to FIG. 4, the touch coordinate calculation unit (212) receives mutual sensing signals (RXS_M), first magnetic sensing signals (RXS_S1), and second magnetic sensing signals (RXS_S2) from the first driving unit (220) and the second driving unit (230), and generates touch coordinates based on at least one of the received mutual sensing signals (RXS_M), first magnetic sensing signals (RXS_S1), and second magnetic sensing signals (RXS_S2).

[0067] When a normal touch situation is determined, the touch coordinate calculation unit (212) receives first magnetic sensing signals (RXS_S1) input by driving the first magnetic sensing mode (SSM1) through the first driving unit (220) and the second driving unit (230), and calculates touch coordinates based on at least one of the mutual sensing signal (RXS_M) or the first magnetic sensing signal (RXS_S1). Additionally, when an abnormal situation is determined, the touch coordinate calculation unit (212) receives second magnetic sensing signals (RXS_S2) input by driving the second magnetic sensing mode (SSM2) through the first driving unit (220) and the second driving unit (230), and calculates touch coordinates based on at least one of the mutual sensing signal (RXS_M) or the second magnetic sensing signal (RXS_S2).

[0068] The touch controller (213) can generate timing control signals to control the driving and sensing timing of the first driving unit (220) and the second driving unit (230).

[0069] The first driving unit (220) supplies a touch driving signal (TXS) to a touch driving electrode (TXE) in a mutual sensing mode (MSM), and supplies a touch driving signal (TXS) to a touch driving electrode (TXE) in a first magnetic sensing mode (SSM1) and a second magnetic sensing mode (SSM2), thereby receiving a magnetic sensing signal (RXS_S) for the supplied touch driving signal (TXS). The first driving unit (220) includes channels connected to each touch driving electrode (TXE). That is, the touch driving signal (TXS) is transmitted to the touch driving electrode (TXE) through each channel, and the magnetic sensing signal (RXS_S) is received from the touch driving electrode (TXE) through each channel.

[0070] In the first magnetic sensing mode (SSM1), the first driving unit (220) supplies touch driving signals (TXS) of different polarities to adjacent touch driving electrodes (TXE) at the same timing. Specifically, during the first frame (1Frame) and the second frame (2Frame), the first driving signal (TXS1) is supplied to the odd-numbered touch driving electrodes (TXE(2n-1)) through each channel connected to the odd-numbered touch driving electrodes (TXE(2n-1)) (where n is an integer), and the second driving signal (TXS2) is supplied to the even-numbered touch driving electrodes (TXE(2n)) through each channel connected to the even-numbered touch driving electrodes (TXE(2n)). At this time, the first driving signal (TXS1) and the second driving signal (TXS2) may have opposite polarities. That is, the first driving signal (TXS1) and the second driving signal (TXS2) may have the same amplitude and period and a phase difference of 180 degrees. For example, in the first magnetic sensing mode (SSM1), the first driving unit (220) outputs the first driving signal (TXS1) of positive (P) polarity to the first touch driving electrode (TXS1) and the third touch driving electrode (TXE3) through a channel connected to each touch driving electrode during the first frame (1Frame) and the second frame (2Frame), and outputs the second driving signal (TXS2) of negative (N) polarity to the second touch driving electrode (TXS2) and the fourth touch driving electrode (TXE4) through a channel connected to each touch driving electrode during the first frame (1Frame) and the second frame (2Frame).

[0071] According to one embodiment of the present invention, in a second magnetic sensing mode (SSM2), the first driving unit (220) supplies driving signals to adjacent touch driving electrodes (TXE) at different timings. Specifically, the first driving unit (220) supplies a first driving signal (TXS1) to the odd-numbered touch driving electrodes (TXE(2n-1)) through each channel connected to the odd-numbered touch driving electrodes (TXE(2n-1)) during a first frame (1Frame), and supplies a second driving signal (TXS2) to the even-numbered touch driving electrodes (TXE(2n)) through each channel connected to the even-numbered touch driving electrodes (TXE(2n)) during a second frame (2Frame). At this time, the first driving signal (TXS1) and the second driving signal (TXS2) may have opposite polarities. That is, the first driving signal (TXS1) and the second driving signal (TXS2) may have the same amplitude and period and a phase difference of 180 degrees. For example, in the second magnetic sensing mode (SSM2), the first driving unit (220) outputs the first driving signal (TXS1) with positive (P) polarity to the first touch driving electrode (TXS1) and the third touch driving electrode (TXE3) through a channel connected to each touch driving electrode during the first frame (1Frame), and outputs the second driving signal (TXS2) with negative (N) polarity to the second touch driving electrode (TXS2) and the fourth touch driving electrode (TXE4) through a channel connected to each touch driving electrode during the second frame (2Frame). However, it is not limited thereto, and in the second magnetic sensing mode (SSM2), the first driving signal (TXS1) and the second driving signal (TXS2) may have the same polarity and the same phase.

[0072] The second driving unit (230) receives a mutual sensing signal (RXS_M) generated for a touch driving signal (TXS) supplied to a touch driving electrode (TXE) in a mutual sensing mode (MSM), and receives a magnetic sensing signal (RXS_S) for a touch driving signal (TXS) supplied to a touch sensing electrode (RXE) in a first magnetic sensing mode (SSM1) and a second magnetic sensing mode (SSM2). Although not illustrated, the second driving unit (230) includes channels connected to each touch sensing electrode (RXE). That is, the touch driving signal (TXS) is transmitted to the touch driving electrode (TXE) through the channels, and the mutual sensing signal (RXS_M) and the magnetic sensing signal (RXS_S) are received from the touch sensing electrode (RXE) through the channels.

[0073] According to one embodiment of the present invention, as illustrated in FIG. 8, in a first magnetic sensing mode (SSM1), a second driving unit (230) supplies touch driving signals (TXS) of different polarities to adjacent touch sensing electrodes (RXE) at the same timing. Specifically, during a first frame (1Frame) and a second frame (2Frame), the second driving unit (230) supplies a first driving signal (TXS1) to the odd-numbered touch sensing electrodes (RXE(2n-1)) through each channel connected to the odd-numbered touch sensing electrodes (RXE(2n-1)), and supplies a second driving signal (TXS2) to the even-numbered touch sensing electrodes (RXE(2n)) through each channel connected to the even-numbered touch sensing electrodes (RXE(2n-1)). At this time, the first driving signal (TXS1) and the second driving signal (TXS2) may have opposite polarities. That is, the first driving signal (TXS1) and the second driving signal (TXS2) have the same amplitude and period and can have a phase difference of 180 degrees. For example, as illustrated in FIG. 8, in the first magnetic sensing mode (SSM1), the second driving unit (230) outputs a first driving signal (TXS1) of positive (P) polarity to the first touch sensing electrode (RXS1) and the third touch sensing electrode (RXE3) through the first channel (CH1) and the third channel (CH3), respectively connected to the first and third touch sensing electrodes (RXE1, RXE3), during the first frame (1Frame) and the second frame (2Frame), and outputs a second driving signal (TXS2) of negative (N) polarity to the second touch sensing electrode (RXS2) and the fourth touch sensing electrode (RXE4) through the second channel (CH2) and the fourth channel (CH4), respectively connected to the second and fourth touch sensing electrodes (RXE2, RXE4), during the first frame (1Frame) and the second frame (2Frame).

[0074] As illustrated in FIGS. 9a and 9b, in the second magnetic sensing mode (SSM2), the second driving unit (230) supplies driving signals to adjacent touch sensing electrodes (RXE) at different timings. Specifically, during the first frame (1Frame), the second driving unit (230) supplies a first driving signal (TXS1) to the odd-numbered touch sensing electrodes (RXE(2n-1)) through each channel connected to the odd-numbered touch sensing electrodes (RXE(2n-1)), and during the second frame (2Frame), supplies a second driving signal (TXS2) to the even-numbered touch sensing electrodes (RXE(2n)) through each channel connected to the even-numbered touch sensing electrodes (RXE(2n)). At this time, as previously described, the first driving signal (TXS1) and the second driving signal (TXS2) may have opposite polarities. That is, the first driving signal (TXS1) and the second driving signal (TXS2) have the same amplitude and period and can have a phase difference of 180 degrees. For example, as illustrated in FIG. 9a and FIG. 9b, in the second magnetic sensing mode (SSM2), the second driving unit (230) outputs a first driving signal (TXS1) of positive (P) polarity to the first touch sensing electrode (RXS1) and the third touch sensing electrode (RXE3) through the first channel (CH1) and the third channel (CH3) connected to the first and third touch sensing electrodes (RXS1, RXS3) during the first frame (1Frame), and outputs a second driving signal (TXS2) of negative (N) polarity to the second touch sensing electrode (RXS2) and the fourth touch sensing electrode (RXE4) through the second channel (CH2) and the fourth channel (CH4) connected to the second to fourth touch sensing electrodes (RXS2, RXS4) during the second frame (2Frame). However, this is not limited thereto, and in the second magnetic sensing mode (SSM2), the first driving signal (TXS1) and the second driving signal (TXS2) may have the same polarity and the same phase.

[0075] According to one embodiment of the present invention, when the first driving unit (220) and the second driving unit (230) are driven in the first magnetic sensing mode (SSM1) and driving signals having different polarities are supplied to the touch screen panel (TSP) at the same timing to adjacent electrodes, the touch screen panel (TSP) can minimize the influence of the retransmission signal and improve touch sensitivity in the LGM (Low Ground Mass) state where it is not connected to ground.

[0077] Those skilled in the art to which the present invention pertains will understand that the above-described invention may be implemented in other specific forms without altering its technical concept or essential features.

[0078] Additionally, the methods described herein may be implemented at least partially using one or more computer programs or components. These components may be provided as a series of computer instructions via a computer-readable or machine-readable medium including volatile and non-volatile memory. The instructions may be provided as software or firmware and may be implemented wholly or partially in hardware configurations such as ASICs, FPGAs, DSPs, or other similar devices. The instructions may be configured to be executed by one or more processors or other hardware configurations, which perform or are capable of performing all or part of the methods and procedures disclosed herein when executing the series of computer instructions.

[0079] Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the invention. Explanation of the symbols

[0080] 1000: Display device 100: Display panel 210: Display driver 211: Timing controller 212: Gate driver 213: Data driver 220: Touch sensing device 221: Touch driving device 222: Touch Controller

Claims

Claim 1 A touch sensing device for driving a plurality of touch sensors, comprising: a control unit that calculates the area of ​​a touch region, the intensity of touch sensitivity, and the uniformity of touch sensitivity using a sensing signal input from the plurality of touch sensors, and classifies whether a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of touch sensitivity, and the uniformity of touch sensitivity; and a first driving unit and a second driving unit that are driven by at least one of a mutual sensing mode according to a mutual capacitance method, a first magnetic sensing mode according to a magnetic capacitance method, or a second magnetic sensing mode; wherein the sensing signal input from the plurality of touch sensors may be at least one of a mutual sensing signal input according to the mutual sensing mode, a first magnetic sensing signal input according to the first magnetic sensing mode, or a second magnetic sensing signal input according to the second magnetic sensing mode, and the control unit determines a touch situation for at least one of the mutual sensing signal, the first magnetic sensing signal, or the second magnetic sensing signal. Claim 2 A touch sensing device according to claim 1, wherein the control unit includes a touch discrimination model that classifies whether the sensing signal is a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity. Claim 3 A touch sensing device according to claim 2, wherein the touch discrimination model is a decision tree trained to receive a plurality of sensing signals as training data and classify the plurality of sensing signals based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity. Claim 4 A touch sensing device according to claim 2, wherein the touch discrimination model calculates a threshold area that serves as a standard for the area of ​​the touch region through learning, calculates a first threshold and a second threshold that serve as standards for the intensity of the touch sensitivity, and calculates a third threshold and a fourth threshold that serve as standards for the uniformity of the touch sensitivity. Claim 5 delete Claim 6 A touch sensing device according to claim 1, wherein the control unit includes a touch discrimination model that classifies whether the sensing signal is a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity, and the touch discrimination model receives at least one of the mutual sensing signal, the first magnetic sensing signal, or the second magnetic sensing signal as input and determines whether at least one of the mutual sensing signal, the first magnetic sensing signal, or the second magnetic sensing signal is a normal touch situation or an abnormal touch situation. Claim 7 A touch sensing device according to claim 1, wherein the control unit drives the first driving unit and the second driving unit in the first magnetic sensing mode or the second magnetic sensing mode according to the determined touch situation. Claim 8 A touch sensing device according to claim 1, further comprising a first driving unit and a second driving unit driven by at least one of a mutual sensing mode, a first magnetic sensing mode, or a second magnetic sensing mode; wherein the control unit includes a touch discrimination model that classifies whether the sensing signal is a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity; and when the touch discrimination model determines the sensing signal to be a normal touch situation, the first driving unit and the second driving unit are driven in the first magnetic sensing mode to supply touch driving signals of different polarities at the same timing to channels respectively connected to adjacent touch driving electrodes or adjacent touch sensing electrodes; and when the touch discrimination model determines the sensing signal to be an abnormal touch situation, the first driving unit and the second driving unit are driven in the second magnetic sensing mode to supply touch driving signals at different timings to channels respectively connected to adjacent touch driving electrodes or adjacent touch sensing electrodes. Claim 9 A touch display driving device for driving a touch display that drives a touch display panel including a plurality of touch sensors, comprising: a control unit that calculates the area of ​​a touch region, the intensity of touch sensitivity, and the uniformity of touch sensitivity using a sensing signal input from the touch sensor, and classifies whether the touch situation is normal or abnormal based on the area of ​​the touch region, the intensity of touch sensitivity, and the uniformity of touch sensitivity; and a first driving unit and a second driving unit that are driven in at least one of a mutual sensing mode, a first magnetic sensing mode, or a second magnetic sensing mode; wherein the sensing signal input from the touch sensor may be a mutual sensing signal input according to the mutual sensing mode, a first magnetic sensing signal input according to the first magnetic sensing mode, or a second magnetic sensing signal input according to the second magnetic sensing mode, and wherein the control unit determines a touch situation for at least one of the mutual sensing signal, the first magnetic sensing signal, or the second magnetic sensing signal. Claim 10 A touch display driving device according to claim 9, wherein the control unit includes a touch discrimination model that classifies whether the sensing signal is a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity. Claim 11 A touch display driving device according to claim 10, characterized in that the touch discrimination model is a decision tree trained to receive a plurality of sensing signals as training data and classify the plurality of sensing signals based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity. Claim 12 A touch display driving device according to claim 10, wherein the touch discrimination model calculates a threshold area that serves as a standard for the area of ​​the touch region through learning, calculates a first threshold and a second threshold that serve as a standard for the intensity of the touch sensitivity, and calculates a third threshold and a fourth threshold that serve as a standard for the uniformity of the touch sensitivity. Claim 13 delete Claim 14 A touch display driving device according to claim 9, wherein the control unit includes a touch discrimination model that classifies whether the sensing signal is a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity, and the touch discrimination model receives at least one of the mutual sensing signal, the first magnetic sensing signal, or the second magnetic sensing signal as input and determines whether at least one of the mutual sensing signal, the first magnetic sensing signal, or the second magnetic sensing signal is a normal touch situation or an abnormal touch situation. Claim 15 A touch display driving device according to claim 9, wherein the control unit drives the first driving unit and the second driving unit in the first magnetic sensing mode or the second magnetic sensing mode depending on the determined touch situation. Claim 16 A touch display driving device according to claim 9, further comprising a first driving unit and a second driving unit driven by at least one of a mutual sensing mode, a first magnetic sensing mode, or a second magnetic sensing mode; wherein the control unit includes a touch discrimination model that classifies whether the sensing signal is a normal touch situation or an abnormal touch situation based on the area of ​​the touch region, the intensity of the touch sensitivity, and the uniformity of the touch sensitivity; and when the touch discrimination model determines the sensing signal as a normal touch situation, the first driving unit and the second driving unit are driven in the first magnetic sensing mode to supply touch driving signals of different polarities at the same timing to channels respectively connected to adjacent touch driving electrodes or adjacent touch sensing electrodes; and when the touch discrimination model determines the sensing signal as an abnormal touch situation, the first driving unit and the second driving unit are driven in the second magnetic sensing mode to supply touch driving signals at different timings to channels respectively connected to adjacent touch driving electrodes or adjacent touch sensing electrodes.

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