TW201629729A - Touch sensing device, touch sensing circuit, data driving circuit, and display device driving method - Google Patents

Abstract

The present disclosure provides a touch sensing device, a touch sensing circuit, a data driving circuit, and a display device driving method, which make it possible to activate different sensing areas according to a finger mode and a hover mode, and which activate as many sensing areas as possible simultaneously in a hover mode, which means sensing driving in the case of non-contact with regard to sensing areas, therby enhancing sensing sensitivity, and improving sensing detection performance even in the hover mode.

Description

Touch sensing device, touch sensing circuit, data driving circuit and display device driving method

The invention relates to a touch sensing device, a touch sensing circuit, a data driving circuit and a display device driving method.

In recent years, a variety of user interfaces (UIs) can be implemented through touch sensors provided on display panels with touch functions. The display panel including the touch sensor is an input/output means, and can realize a touch-based input function and an information output function.

Compared with the existing resistive touch panel, the display panel with capacitive touch function has the advantages of better durability and definition, and can realize multi-touch recognition and proximity touch recognition, so that it can be applied to A variety of applications.

The display panel with capacitive touch function includes a substrate including a touch sensor that is bonded to the display panel, or the touch sensor is embedded in the display panel (embedded). Therefore, the display panel is electrically coupled to the display element.

In recent years, research has been conducted in the industry, such that a display panel having a touch function can recognize not only a contact touch mode such as a touch in a finger mode, but also a non-contact touch mode such as a hover mode or a proximity touch. Touch in the (proximity touch) mode. The touch touch mode used herein refers to a function capable of recognizing a direct contact of an index or a finger with respect to a display panel. The non-contact touch mode means that the recognition of the proximity touch or floating touch of the display panel is possible. In the case of proximity touch, the pointer or the finger does not directly touch the display panel, but is very close to the display panel, and is in suspension. In the case of a touch, the pointer or finger is suspended above the display panel.

Regarding the display panel including the in-cell touch sensor, the touch function in the non-contact touch mode has not been implemented yet.

One aspect of the present invention addresses the above problems and other problems.

Another aspect of the present invention provides a touch sensing device for maintaining excellent recognition sensitivity in a display panel including an in-cell touch sensor, thereby implementing touch recognition in a contactless touch mode.

In another aspect, the present invention provides a touch sensing device, a touch sensing circuit, a data driving circuit, and a display device driving method, and can implement a touch driving device suitable for each touch touch and non-contact touch.

According to an aspect, the present invention provides a touch sensing device, including: a display panel including a plurality of touch sensors; and a sensing signal detecting unit for supplying driving signals for touch recognition to a plurality of touches Controlling the sensor and detecting the sensing signal through the plurality of touch sensors; and selecting a circuit for electrically connecting the plurality of touch sensors to the sensing signal detecting unit during the touch driving, wherein When the touch driving is a non-contact touch driving, the driving signals supplied to the plurality of touch sensors use the driving signals supplied to the plurality of touch drivers when the touch driving is the touch driving, as the reference waveform, and the driving signal The reference waveform is overdriven as much as the overdrive voltage during the predetermined overdrive period.

According to another aspect, the present invention provides a touch sensing device, including: a display panel including a plurality of touch sensors; and a sensing signal detecting unit for supplying driving signals for touch recognition to a plurality of a touch sensor and a plurality of touch sensors for detecting a touch signal; and a selection circuit for electrically connecting the plurality of touch sensors to the sensing signal detecting unit during the touch driving, wherein The touch drive is a contact touch drive and the touch drive is a non-contact touch drive. The selection circuit is configured to electrically connect different numbers of touch sensors to the sensing signal detecting unit.

According to another aspect, the present invention provides a touch sensing circuit including: a sensing signal detecting unit for sequentially outputting driving signals to be applied to a plurality of touch sensors and through a plurality of touch sensors Detecting a sensing signal; and selecting a circuit for electrically connecting the plurality of touch sensors to the sensing signal detecting unit during the touch driving, wherein the driving signal is output when the touch driving is a non-contact touch driving The driving signal output when the touch driving is the touch driving is used as the reference waveform, and is driven as much as the overdriving voltage during the predetermined overdrive period compared to the reference waveform.

According to another aspect, the present invention provides a touch sensing circuit including: a sensing signal detecting unit for sequentially outputting driving signals to be applied to a plurality of touch sensors and through a plurality of touch sensors The sensing signal is detected; and the selection circuit is configured to electrically connect a different number of touch sensors to the sensing signal detecting unit in the case of contacting the touch driving device and the non-contact touch driving device.

According to another aspect, the present invention provides a touch sensing circuit electrically connected to a plurality of touch sensors arranged on a display panel for supplying a driving signal to a plurality of touch sensors during a touch driving mode, wherein When the touch driving mode is the non-contact touch driving mode, the driving signal is overdriven as much as the overdriving voltage during the predetermined overdrive period compared to the reference waveform.

According to another aspect, the present invention provides a touch sensing circuit electrically connected to a plurality of touch sensors arranged on a display panel for sequentially supplying driving signals to a plurality of touch sensors during a touch driving mode. The driving signal is supplied to a touch sensor at a predetermined timing when the touch driving is contacted, and the driving signal is supplied to the two or more touches at a predetermined timing in the case of the non-contact touch driving. Sensor.

According to another aspect, the present invention provides a touch sensing circuit electrically connected to a plurality of touch sensors arranged on a display panel. In the case of contacting the touch driving, at most, the driving signals are sequentially supplied during the touch driving. The touch sensor is configured to detect whether a touch is detected to detect whether a touch area is touched by each of the touch sensing sensors, and in the case of the non-contact touch driving, Detect whether there is a touch on each block corresponding to two or more touch sensors.

According to another aspect, the present invention provides a data driving circuit electrically connecting a plurality of data lines arranged on a display panel, and electrically connecting a plurality of touch sensors arranged on the display panel for outputting a data voltage during the display driving mode. The plurality of data lines are used to sequentially supply the driving signals to the plurality of touch sensors during the touch driving mode, and are used to supply the plurality of touch sensors when the touch driving mode is the touch driving mode. The driving signal is used as a reference waveform, and when the touch driving mode is the non-contact touch driving mode, the driving signal is supplied. Compared with the reference waveform, the driving signal is overdriven as much as the overdriving voltage during the predetermined overdrive period.

According to another aspect, the present invention provides a data driving circuit electrically connecting a plurality of data lines arranged on a display panel, and electrically connecting the plurality of touch sensors arranged on the display panel for outputting data during the display driving mode. The voltage is up to a plurality of data lines for sequentially supplying the driving signals to the plurality of touch sensors during the touch driving mode, and is configured to supply the driving signals to a touch sensor at a predetermined timing while contacting the touch driving mode. And supplying the driving signal to the two or more touch sensors at a predetermined timing in the case of the non-contact touch driving.

According to another aspect, the present invention provides a data driving circuit electrically connecting a plurality of data lines arranged on a display panel, and electrically connecting a plurality of touch sensors arranged on the display panel for outputting a data voltage during the display driving mode. The plurality of data lines are used to detect whether a touch is generated by successively supplying the driving signals to the plurality of touch sensors during the touch driving to detect a touch sensing when the touch driving is touched. Whether each of the sensing areas corresponds to a touch, and in the case of a non-contact touch driving, is used to detect whether a touch is detected for each block corresponding to the two or more touch sensors.

According to another aspect, the present invention provides a driving method for a display device, wherein the display device includes a display panel on which a plurality of data lines and a plurality of gate lines are arranged, a data driving circuit for driving a plurality of data lines, and To drive a gate drive circuit of a plurality of gate lines, the method includes: outputting a data voltage to the plurality of data lines during the display driving mode; and supplying the driving signals to the plurality of embedded in the display panel during the touch driving mode The touch sensor is provided when driving the driving signal, when the touch driving mode is the non-contact touch driving mode, and when the touch driving mode is the touch driving mode, the driving is supplied to the plurality of touch sensors. The signal is used as a reference waveform, and during the predetermined overdrive period, as many drive signals as the overdrive voltage are overdriven compared to the reference waveform.

According to another aspect, the present invention provides a driving method for a display device. The display device includes a display panel on which a plurality of data lines and a plurality of gate lines are arranged, a data driving circuit for driving a plurality of data lines, and a gate driving circuit for driving a plurality of gate lines, the method comprising: outputting a data voltage to the plurality of data lines during the display driving mode; and sequentially supplying the driving signals to the plurality of embedded in the display panel during the touch driving mode a touch sensor, wherein when the driving signal is supplied, the driving signal is supplied to a touch sensor at a predetermined timing in the case of contacting the touch driving, and the driving signal is supplied to the predetermined timing in the case of the non-contact touch driving to Two or more touch sensors.

The beneficial effects of the terminal of the present invention will now be described.

In addition, according to at least one of the embodiments of the present invention, since the touch touch mode and the non-contact touch mode can be driven, not only the touch detection of the user's direct contact is possible, but also the contact is not Touch detection of contact and touch is also possible, thereby expanding the range of use of the touch sensing device.

In addition, according to at least one of the embodiments of the present invention, a plurality of sensing regions in each sensing region block may be sequentially activated in the touch touch mode. In the touch touch mode, direct contact of the user occurs in the sensing area, and even if each sensing area is activated individually, the large capacitance of each sensing area is sufficient to detect whether the sensing area has appeared through each sensing area. User touch is possible.

On the other hand, in the non-contact touch mode, although the user's finger is kept out of contact with the sensing area by a predetermined distance, it is still possible to detect whether the touch has occurred. In this case, as the distance between the sensing area and the user's finger increases, the capacitance of each sensing area increases significantly compared to the touch-touch mode. An advantage of the present invention is that a plurality of sensing regions are activated such that it is possible to sense whether a touch is present in the non-contact touch mode, and increasing the capacitance of the entire sensing region improves the sensing capability.

According to the present invention, a touch sensing device, a touch sensing circuit, and a data driving circuit may be provided, and a touch driving suitable for each touch touch and non-contact touch may be completed.

Additional scope of applicability of the present invention will become apparent from the following detailed description. However, it will be apparent to those skilled in the art that the claims

The embodiments disclosed in the specification are described in detail below with reference to the accompanying drawings, wherein the same reference numerals are used to refer to the same or similar elements, and the repeated description thereof will be omitted herein. The suffixes of the components used in the following descriptions such as "module" and "unit" are specified or used together for convenience of description only, without distinction of meaning or role. Further, in the following description of the present invention, the detailed description of the known technology incorporated herein will be omitted when the subject matter of the present disclosure is rather obscured. In addition, the drawings are only for the purpose of better understanding the embodiments disclosed in the specification, and are not to be construed as limiting .

The display device of the present invention provides a touch mode, and the touch mode can be mainly divided into a touch touch mode and a non-contact touch mode.

The touch touch mode refers to a mode in which the touch is recognized by direct contact with the display panel, which is also referred to as a finger mode.

The non-contact touch mode refers to a mode in which the touch on the display panel is recognized when the display panel is not directly touched, and includes a proximity touch mode and a floating mode. In the proximity touch mode, the proximity touch that is not in contact with the touch panel is recognized. In the hover mode, the touch caused by the suspension above the display panel is recognized.

In addition, the display device of the present invention is implemented based on a flat display device such as a liquid crystal display (LCD), a field emission display (FED), a plasma display (PDP), an organic light emitting display (OLED), an electrophoretic display (EPD). Wait.

It is to be noted that although the display device is described in the following embodiments in connection with a liquid crystal display as an example of a flat display device, the display device of the present invention is not limited to the liquid crystal display.

The liquid crystal display of the present invention comprises a touch sensor (TS) as shown in FIG. 1; that is, the touch sensor is embedded in the pixel array of the liquid crystal display panel. In Fig. 1, "PIX" refers to the pixel electrode of the pixel, "GLS1" refers to the upper substrate, "GLS2" refers to the lower substrate, and "POL2" refers to the lower polarizer.

The liquid crystal display panel includes a plurality of pixels arranged thereon. Each pixel contains red, green, blue sub-pixels or red, green, blue, and white sub-pixels, but is not limited to this.

The upper substrate GLS1 includes red, green, and blue color filters corresponding to the sub-pixels of each pixel, or a color filter layer including red, green, blue, and white color filters.

The touch sensor TS is arranged on each pixel or on each sub-pixel, but is not limited thereto.

Each pixel contains a thin film transistor and a pixel electrode arranged thereon, the thin film transistor makes it possible to select each pixel, and the pixel electrode is electrically connected to the thin film transistor.

The touch sensor TS is a capacitive touch sensor TS, which senses a change in capacitance caused by a touch, but is not limited thereto.

The touch sensor TS senses not only the capacitance change caused by the direct contact with respect to the upper surface of the upper substrate GLS1 but also the capacitance caused by the non-contact (adjacent and floating) of the upper surface of the upper substrate (GLS1). Change, and determine whether a touch has occurred based on the sensing result.

The suspension used herein refers to a state in which the distance from the upper surface of the upper substrate GLS1 is larger than that in the adjacent case.

The display panel including the capacitive touch sensor TS is classified into a self-capacitance type and a mutual capacitance type. A single layer conductor wiring formed in one direction forms a self capacitance. A mutual capacitance is formed between two vertical layers of the conductor wiring.

2 is a block diagram of a display device according to an embodiment of the present invention, and FIG. 3 is an equivalent circuit diagram of a liquid crystal cell.

Referring to FIGS. 2 and 3, the display device of the present invention includes a display panel (10), a display panel driving circuit, a timing controller (22), and a touch sensing circuit (100).

The display panel (10) is an in-cell self-capacitance display panel in which the touch sensor TS as shown in FIG. 1 is embedded.

The display panel (10) includes a liquid crystal layer formed between the two substrates GSL1 and GLS2. The substrate is manufactured as a glass substrate, a plastic substrate, a film substrate, or the like. The pixel array formed on the lower substrate GLS2 of the display panel 10 includes a data line 11, a gate line 12 extending perpendicularly to the data line 11, and a pixel arranged in a matrix type. The pixel array further includes a plurality of thin film transistor TFTs formed at intersections between the data lines 11 and the gate lines 12, and a pixel electrode 1 that is charged by a material voltage to connect the pixel electrodes 1 to maintain the pixels. Voltage storage capacitor Cst, etc.

The pixels of the display panel 10 are arranged in a matrix defined by the data lines 11 and the gate lines 12. The data voltage is applied to the pixel electrode 1, a common voltage is applied to the common electrode 2, the liquid crystal cell Clc in each pixel is driven according to the electric field applied by the voltage difference between the data voltage and the common voltage, and the liquid crystal cell Clc adjusts the incident. The amount of light transmitted. The thin film transistor is turned on in response to a gate pulse from the gate line 12, and the pixel electrode 1 of the liquid crystal cell Clc is supplied with a voltage from the data line 11. The common electrode 2 is formed on the lower substrate GLS2 or the upper substrate GLS1.

The substrate GLS1 on the display panel 10 includes a black matrix, a color filter, and the like. The polarizing plates POL1 and POL2 are respectively bonded to the upper substrate GLS1 and the lower substrate GLS2 of the display panel 10, and an alignment film (not shown) is formed on the inner surface to be in contact with the liquid crystal to set the pretilt angle of the liquid crystal. A spacer (not shown) is formed between the substrate GLS1 and the lower substrate GLS2 above the display panel 10, thereby maintaining the cell gap of the liquid crystal cell Clc, but is not limited to any manner.

The display panel 10 is implemented as any widely known liquid crystal mode, such as a twisted nematic (TN) mode, a vertical alignment (VA) mode, an In Plane Switching (IPS) mode, and a fringe field. Switch (Fringe Field Switching; FFS) mode, etc.

A backlight unit (not shown) is arranged on the rear surface of the display panel 10. The backlight unit is implemented as an edge-lit or direct-lit backlight unit, and emits light to the display panel 10.

Using the data driving circuit 24 and the gate driving circuit, the display panel driving circuit writes information on the input image into the pixels of the display panel 10.

Using the analog positive/negative gamma compensation voltage, the data driving circuit 24 generates a data voltage by converting the digital video data RGB input from the timing controller 22. Under the control of the timing controller 22, the data driving circuit 24 supplies the data line 11 with the data voltage and reverses the polarity of the data voltage.

The gate driving circuit sequentially supplies the gate line 12 with a gate pulse (or a scan pulse) synchronized with the material voltage, and selects a line of the display panel 10 in which the data voltage is written.

The gate drive circuit includes a level shifter 26 and a shift register 30. The shift register 30 is formed directly on the substrate of the display panel 10 according to the gate in panel (GIP) process technology.

The level shifter 26 is formed on a printed circuit board (hereinafter, referred to as a PCB) 20 together with the timing controller 22, and the printed circuit board 20 is electrically connected to the lower substrate GLS2 of the display panel 10. Under the control of the timing controller 22, the level shifter 26 outputs a start pulse VST and at least one clock signal CLK, and the start pulse VST swings between the gate high voltage VGH and the gate low voltage VGL. The gate high voltage VGH is set to be equal to or higher than the voltage of the threshold voltage of the thin film transistor formed in the pixel array of the display panel 10. The gate low voltage VGL is set to be equal to or lower than the voltage of the threshold voltage of the thin film transistor formed in the pixel array of the display panel 10. The level shifter 26 outputs a start pulse VST and at least one clock signal CLK which are oscillated between the gate high voltage VGH and the gate low voltage VGL, respectively, in response to the start pulse ST input from the timing controller 22, first Clock GCLK and second clock MCLK. The at least one clock signal CLK output by the level shifter 26 successively undergoes phase shifting and is transferred to the shift register 30 formed on the display panel 10.

The shift register 30 is arranged on the edge of the lower substrate GLS2 of the display panel 10 on which the pixel array is formed, thereby connecting the gate lines 12 of the pixel array. Shift register 30 contains multiple stages of slave connections.

The shift register 30 starts the operation in response to the start pulse VST input from the level shifter 26, shifts the output in response to the clock signal CLK, and sequentially supplies the gate line 12 of the display panel 10 with the gate pulse.

The timing controller 22 supplies the data driving circuit 24 with digital video data input from an external host system. The data driving circuit 24 is fabricated as an integrated circuit (IC) and mounted on a chip-on-board or a chip-on-film.

The timing controller 22 receives timing signals input from an external host system, such as a vertical sync signal Vsync, a horizontal sync signal Hsync, a data enable DE signal, a clock, etc., and generates a control data driving circuit 24 and a gate driving circuit. Timing control signal for job timing. The timing controller 22 or the host system generates a synchronization signal SYNC (refer to FIG. 4) for controlling the operation timing of the display panel driving circuit and the touch sensing circuit 100.

The touch sensing circuit 100 applies a driving signal to the wiring connected to the touch sensor TS, and counts the change in the driving signal voltage before and after the delay time of the rising or falling edge of the touch or driving signal, thereby sensing the touch. (or adjacent) the change in capacitance before and after the input. The touch sensing circuit 100 converts the voltage received from the touch sensor TS into digital data, thereby generating touch raw data, performing a preset touch recognition algorithm, analyzing the touch original data, and detecting the touch. (or adjacent) input. The touch sensing circuit 100 transmits touch report data including coordinates of the touched (or adjacent) input position to the host system.

The host system is implemented as one of a navigation system, a set-top box, a DVD player, a Blu-ray player, a personal computer, a home theater system, a broadcast receiver, and a telephone system. The host system uses a scaler to convert the digital video data of the input image into a format conforming to the resolution of the display panel 10, and to transmit the data and timing signals to the timing controller 22. In addition, the host system executes an application associated with the touch (or proximity) input in response to the touch report data input from the touch sensing circuit 100.

The display 10 in which the touch sensor TS is embedded and the touch sensing circuit 100 are driven in time according to the method shown in FIG. As shown in FIG. 4, one frame period is divided into a display panel driving period T1 and a touch driving period T2.

In Fig. 4, "Vsync" refers to the first vertical sync signal input to the timing controller 22, and "SYNC" refers to the second vertical sync signal input to the touch sensing circuit 100. In order to define the display panel driving period T1 and the touch driving period T2 in a frame period, the timing controller 22 modulates the first vertical synchronization signal Vsync input from the host system to generate a second vertical synchronization signal SYNC. In various embodiments, the host system generates a second vertical sync signal SYNC as shown in FIG. 4, and the timing controller 22 controls the display panel drive period T1 and the touch drive period T2 in response to the input from the host system. Two vertical sync signals SYNC. Therefore, according to the present invention, a frame period is divided into a display panel driving period T1 and a touch driving period T2, so that as a controller for controlling the operation timing of the display panel driving circuit and the touch sensing circuit 100, timing control can be used. One of the devices 22 and the host system.

The display panel driving period T1 is defined in the low logic level region of the second vertical synchronization signal SYNC, and the touch driving period T2 is defined in the high logic level region of the second vertical synchronization signal SYNC, but the invention is not limited thereto. herein. For example, the display panel driving period T1 is defined in the high logic level region of the second vertical synchronization signal SYNC, and the touch driving period T2 is defined in the low logic level region of the second vertical synchronization signal SYNC.

During the display panel driving period T1, the display panel driving circuit is driven, and the touch sensing circuit 100 is not driven. During the display panel driving period T1, the data driving circuit 24 supplies the data line 11 with the data voltage under the control of the timing controller 22, and the gate driving circuit sequentially supplies the gate line 12 with the gate pulse. During the display panel driving period T1, the touch sensing circuit 100 does not supply the touch sensor TS of the display panel 10 with the driving signal.

During the touch drive period T2, the display panel drive circuit is not driven. The touch sensing circuit 100 applies a driving signal to the touch sensor TS during the touch driving period T2.

Sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d The touch sensor TS in (Fig. 5) is connected to the sensing lines 121a, 121b, 121c, 121d, 122a, 122b, 122c, 122d, 123a, 123b, 123c, 123d, 124a, 124b, 124c, 124d, 125a, 125b, 125c, 125d, 126a, 126b, 126c and 126d (Fig. 5). For example, the sensing lines 121a, 121b, 121c, 121d, 122a, 122b, 122c, 122d, 123a, 123b, 123c, 123d, 124a, 124b, 124c, 124d, 125a, 125b, 125c, 125d, 126a, 126b, 126c and 126d are arranged in parallel with the gate line 12, but are not limited thereto.

A touch sensor is formed in each sensing area, or a plurality of touch sensors are formed in each sensing area.

Each of the sensing regions corresponds to a plurality of pixels, but the present invention is not limited thereto. A touch sensor is formed in each pixel, or a touch sensor is formed in a plurality of pixels.

The in-cell touch display panel 10 has a touch sensor TS embedded in the display panel 10 as shown in FIG. 1 , and is more sensitive than the touch sensor TS is bonded to the display panel. The ground is affected by changes in the load of the display panel or changes in parasitic capacitance.

Hereinafter, the wiring structure of the in-cell display panel 10 and the driving method thereof will be described.

5 is a schematic view of the touch sensing device of the present invention, and FIG. 6 is a schematic view showing the selection circuit of FIG. 5 in detail.

The touch sensing device shown in FIG. 5 is a part of the display device shown in FIG.

Referring to FIG. 5 , the touch sensing device of the present invention includes an in-cell, self-capacitance display panel 10 .

The display panel 10 includes a plurality of sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a , 116b, 116c and 116d. Each of the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d is made of a transparent conductive material such as indium tin oxide (ITO), but the invention is not limited thereto. For example, each of the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c, and 116d are arranged on the same layer as the pixel electrode 1, but the present invention is not limited thereto.

Each of the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d connects the touch sensor TS shown in FIG.

Each of the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and The size of 116d is at least larger than the pixel size. In other words, the size of one sensing area corresponds to the overall size of a plurality of pixels. For example, each of the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d correspond to at least three pixels, but the invention is not limited thereto. That is, one sensing area is defined as relating to at least three pixels. The number of pixels and the overall size of the pixels corresponding to the size of one sensing area can be optimized through experiments.

Each of the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d is used as a touch electrode, for example, during the touch driving period T2, and is used as a common electrode, for example, during the display panel driving period T1.

The touch sensing circuit 100 is disabled during the display panel driving period T1 and is enabled during the touch driving period T2, thereby sensing lines 121a, 121b, 121c, 121d, 122a during the touch driving period T2. , 122b, 122c, 122d, 123a, 123b, 123c, 123d, 124a, 124b, 124c, 124d, 125a, 125b, 125c, 125d, 126a, 126b, 126c and 126d supply drive signals to the sensing areas 111a, 111b, 111c , 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d (please refer to Fig. 12).

During the display panel driving period T1, the common voltage generated by the common voltage generating unit (not shown) is passed through the sensing lines 121a, 121b, 121c, 121d, 122a, 122b, 122c, 122d, 123a, 123b, 123c, 123d, 124a , 124b, 124c, 124d, 125a, 125b, 125c, 125d, 126a, 126b, 126c and 126d are supplied to the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d. Therefore, by being supplied to the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a The liquid crystal displacement caused by the potential difference between the common voltages of 116b, 116c, and 116d and the data voltage supplied to the pixel electrode 1 can display an image on the display panel 10.

During the touch driving period T2, the driving signals S1 to S4 generated by the touch sensing circuit 100 (please refer to FIG. 12) are supplied to the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d. As a result, the corresponding sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b , 116c and 116d are activated; and when the user inputs about the corresponding sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a When the touches 115b, 115c, 115d, 116a, 116b, 116c, and 116d are touched, the corresponding sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, The capacitances connected to 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d are changed, and the sensing signals appear as the changing capacitances are reflected in the driving signals S1 to S4, and the sensing signals are Detected and provided to the touch sensing circuit 100.

The sensing area including the at least one touch sensor TS is electrically connected to the corresponding sensing line.

As shown in FIG. 12, the driving signals S1 to S4 pass through the sensing lines 121a, 121b, 121c, 121d, 122a, 122b, 122c, 122d, 123a, 123b, 123c, 123d, 124a, 124b, 124c, 124d, 125a, 125b. , 125c, 125d, 126a, 126b, 126c, and 126d are supplied to the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c, and 116d, and according to whether the user touches the sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, The capacitance changes occurring at 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c, and 116d pass through the sensing lines 121a, 121b, 121c, 121d, 122a, 122b, 122c, 122d, 123a, 123b 123c, 123d, 124a, 124b, 124c, 124d, 125a, 125b, 125c, 125d, 126a, 126b, 126c and 126d are provided to the touch sensing circuit 100 to enable touch recognition.

The plurality of sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, are distinguished by the plurality of sensing region blocks 170, 180 and 190, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d. For example, along the sensing lines 121a, 121b, 121c, 121d, 122a, 122b, 122c, 122d, 123a, 123b, 123c, 123d, 124a, 124b, 124c, 124d, 125a, 125b, 125c, 125d, 126a, 126b a plurality of sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, arranged in the longitudinal direction of 126c and 126d, 115c, 115d, 116a, 116b, 116c and 116d are defined as one sensing area block.

In this case, as shown in Fig. 5, first to sixth sensing area blocks 170a, 180a, 190a, 170b, 180b, and 190b are provided. Although FIG. 5 shows six sensing area blocks 170a, 180a, 190a, 170b, 180b, and 190b, each of which includes four sensing areas, for convenience of description, the present invention may include more than six sensing area areas. Blocks, each containing more than four sensing regions.

As shown in FIG. 5, the first sensing area block 170a includes four sensing areas 111a, 111b, 111c, and 111d, and each of the sensing areas 111a, 111b, 111c, and 111d is connected to the corresponding sensing lines 121a, 121b, and 121c. With 121d.

On the other hand, the touch sensing circuit 100 includes a sensing signal detecting unit 104 and a selection circuit 102.

The sensing signal detecting unit 104 supplies the driving signals S1 to S4 shown in FIG. 12 to the respective sensing area blocks 170a, 180a, 190a, 170b, 180b and 190b or to the respective sensing areas 111a on the display panel 10, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c and 116d, and by each Sensing area blocks 170a, 180a, 190a, 170b, 180b, and 190b or by sensing areas 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c, and 116d receive the sensing signals caused by the sensing.

The selection circuit 102 successively selects the plurality of sensing regions 111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b included in each of the sensing region blocks 170a, 180a, 190a, 170b, 180b and 190b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c, and 116d, or simultaneously select each of the sensing area blocks 170a, 180a, 190a, 170b, 180b, and 190b At least two of the plurality of sensing regions 111 to 116.

For example, in the case of the finger mode, the selection circuit 102 selects the first sensing region 111a included in the first sensing region block 170a during the first period of the touch driving period T2, and selects the second period during the second period. A second sensing area 111b included in the sensing area block 170a. Thereafter, the selection circuit 102 selects the third sensing region 111c included in the first sensing region block 170a during the third period, and selects the fourth sense included in the first sensing region block 170a during the fourth period. The area 111d is measured. After all of the sensing regions 111a, 111b, 111c, and 111d inside the first sensing region block 170a have been successively selected, all of the sensing regions 112a, 112b, 112c, and 112d included in the second sensing region block 180a are included. They have been selected one after another. In this manner, the selection circuit 102 successively selects all of the sensing regions 113a to 113d, 114a to 114d, 115a to 115d, and 116a to 116d included in the third to sixth sensing region blocks 190a, 170b, 180b, and 190b.

During the period selected by the selection circuit 102, the sensing signal is detected from the corresponding sensing area, and the sensing signal is supplied to the sensing signal detecting unit 104.

In the case of the floating mode, for example, the selection circuit 102 selects the first and second sensing regions 111a and 111b included in the first sensing region block 170a during the first period of the touch driving period T2. The first and second sensing regions 112a and 112b included in the second sensing region block 180a, and the first and second sensing regions 113a and 113b included in the third sensing region block 190a. Thereafter, the selection circuit 102 selects the third and fourth sensing regions 111c and 111d included in the first sensing region block 170a during the second period, and the third and fourth portions included in the second sensing region block 180a. The sensing regions 112c and 112d, and the third and fourth sensing regions 113c and 113d included in the third sensing region block 190a. In this manner, the selection circuit 102 selects the plurality of sensing regions 114a to 114d, 115a to 115d and 116a to 116d included in the fourth to sixth sensing region blocks 170b, 180b, and 190b.

As shown in FIG. 6, the sensing signal detecting unit 104 includes a first sensing signal detecting unit 104a and a second sensing signal detecting unit 104b. The selection circuit 102 includes a first selection circuit 102a and a second selection circuit 102b. For example, each of the first selection circuit 102a and the second selection circuit 102b is a multiplexer, but the present invention is not limited thereto.

Although for convenience of description, it has been assumed that two sensing signal detecting units 104 and two selecting circuits 102 are provided, and more than two sensing signal detecting units 104 and more than two selecting circuits 102 may be provided.

In order to reduce the number of output pins of the sensing signal detecting unit 104, a first selection circuit 102a and a second selection circuit 102b are installed between the sensing signal detecting unit 104 and the display panel 10.

Each of the first selection circuit 102a and the second selection circuit 102b is 1:N (N is a positive integer equal to or greater than 2 and less than n, n is the number of sensing lines), and the sensing signal can be detected. The number of pins of unit 104 is reduced by 1/N.

The output of the first sensing signal detecting unit 104a is connected to the input end of the first selection circuit 102a. The output end of the second sensing signal detecting unit 104b is connected to the input end of the second selecting circuit 102b.

For example, the first to fourth output lines 131a, 131b, 131c, and 131d are arranged between the first sensing signal detecting unit 104a and the first selecting circuit 102a, and the first to fourth output lines 132a, 132b, 132c and 132d are arranged between the second sensing signal detecting unit and the second selecting circuit 102b. For example, the first ends of the first to fourth output lines 131a, 131b, 131c, and 131d are connected to the output ends of the first sensing signal detecting unit 104a, and the first to fourth output lines 131a, 131b, 131c and The second end of 131d is coupled to the input of first selection circuit 102a. For example, the first ends of the first to fourth output lines 132a, 132b, 132c, and 132d are connected to the output ends of the second sensing signal detecting unit, and the first to fourth output lines 132a, 132b, 132c, and 132d. The second end is coupled to the input of the second selection circuit 102b.

The output end of the first selection circuit 102a connects the sensing lines 121a to 121d, 122a to 122d and 123a to 123d included in the first to third sensing area blocks 170a, 180a and 190a, and the output end of the second selection circuit 102b. The sensing lines 124a to 124d, 125a to 125d, and 126a to 126d included in the fourth to sixth sensing region blocks 170b, 180b, and 190b are connected.

For example, in the case of the finger mode, the first to fourth output lines 131a, 131b, 131c, and 131d connected to the input terminals of the first selection circuit 102a are successively connected one to one to the first selection circuit 102a. The output ends are connected to the first to fourth sensing lines 121a to 121d included in the first sensing area block 170a, to the first to fourth sensing lines 122a to 122d included in the second sensing area block 180a, or The first to fourth sensing lines 123a to 123d included in the third sensing area block 190a. Similarly, in the case of the finger mode, the first to fourth output lines 132a, 132b, 132c and 132d connected to the input terminal of the second selection circuit 102b are successively connected one-to-one to the output of the second selection circuit 102b. The first to fourth sensing lines 124a to 124d included in the fourth sensing area block 170b connected to the end, to the first to fourth sensing lines 125a to 125d included in the fifth sensing area block 180b, or to The first to fourth sensing lines 126a to 126d included in the sixth sensing area block 190b.

For example, in the case of the floating mode, the first output line 131a connected to the input end of the first selection circuit 102a is simultaneously connected to the first to third sensing area blocks respectively connected to the output end of the first selection circuit 102a. The first sensing lines 121a, 122a and 123a included in the 170a, 180a and 190a, and the second output line 131b connected to the input end of the first selection circuit 102a are simultaneously connected to the first end connected to the output end of the first selection circuit 102a, respectively. The second sensing lines 121b, 122b, and 123b included in the third sensing area blocks 170a, 180a, and 190a. For example, in the case of the floating mode, the first output line 132a connected to the input end of the second selection circuit 102b is simultaneously connected to the fourth to sixth sensing area blocks respectively connected to the output end of the second selection circuit 102b. The first sensing lines 124a, 125a and 126a included in 170b, 180b and 190b, and the second output line 132b connected to the input end of the second selection circuit 102b are simultaneously connected to the fourth terminal connected to the output end of the second selection circuit 102b, respectively. The second sensing lines 124b, 125b, and 126b included in the sixth sensing area blocks 170b, 180b, and 190b.

As shown in FIG. 7, the first selection circuit 102a includes first to third switch groups 140, 150, and 160.

For example, the output of the first switch group 140 is connected to the first to fourth sensing lines 121a to 121d of the first sensing area block 170a. For example, the output of the second switch group 150 is connected to the first to fourth sensing lines 122a to 122d of the second sensing area block 180a. For example, the output of the third switch group 160 is connected to the first to fourth sensing lines 123a to 123d of the third sensing area block 190a.

For example, the first switch group 140 connects the first to fourth output lines 131a, 131b, 131c, and 131d connected to the output end of the first sensing signal detecting unit 104a to the first sensing area block, respectively. First to fourth sensing lines 121a to 121d of 170a.

For example, the second switch group 150 connects the first to fourth output lines 131a, 131b, 131c and 131d connected to the output end of the first sensing signal detecting unit 104a to the second sensing area block, respectively. First to fourth sensing lines 122a to 122d of 180a.

For example, the third switch group 160 connects the first to fourth output lines 131a, 131b, 131c, and 131d connected to the output end of the first sensing signal detecting unit 104a to the third sensing area block, respectively. First to fourth sensing lines 123a to 123d of 190a.

For example, the first switch group 140 includes first to fourth switches 142, 144, 146, and 148. The first to fourth switches 142, 144, 146, and 148 are semiconductor transistors, but the present invention is not limited thereto. The first switch 142 is connected between the first output line 131a and the first sensing line 121a of the first sensing area block 170a. The second switch 144 is connected between the second output line 131b and the second sensing line 121b of the first sensing area block 170a. The third switch 146 is connected between the third output line 131c and the third sensing line 121c of the first sensing area block 170a. The fourth switch 148 is connected between the fourth output line 131d and the fourth sensing line 121d of the first sensing area block 170a.

Similarly, the second switch group 150 includes first to fourth switches 152, 154, 156, and 158, and the third switch group 160 includes first to fourth switches 162, 164, 166, and 168.

On the other hand, although not shown, the detailed structure of the second selection circuit 102b is substantially the same as the detailed structure of the first selection circuit 102a, so that the second selection circuit 102b can be easily understood from the detailed structure of the first selection circuit 102a. The detailed structure is omitted herein for the sake of clarity.

The touch sensing device including the selection circuit 102 configured above can be driven differently according to the finger mode and the floating mode. In the case of the finger mode, the selection circuit 102 is driven by the selection signals S11, S21, S31 and S41 shown in Fig. 8, and in the case of the floating mode, the selection signals S12 and S22 shown in Fig. 10 are used. The selection circuit 102 is driven. The selection signals shown in Figs. 8 and 10 are merely examples, and various variations are possible.

Finger mode drive

A driving method of a finger mode associated with the touch sensing device will be described with reference to FIGS. 5 to 9.

FIG. 8 is a waveform diagram of a touch sensing device according to the present invention driven by a finger mode, and FIGS. 9A to 9D are schematic diagrams of finger mode driving associated with the touch sensing device of the present invention.

As shown in Fig. 8, the first to fourth selection signals S11, S21, S31, and S41 are supplied to the first selection circuit 102a. In particular, the first selection signal S11 is supplied to the first switches 142, 152 and 162 of the first to third switch groups 140, 150 and 160, respectively, such that the first switches 142, 152 and 162 can be controlled to switch in response to the first A selection signal S11. The second selection signal S21 is supplied to the second switches 144, 154 and 164 of the first to third switch groups 140, 150 and 160, respectively, such that the second switches 144, 154 and 164 can be controlled to switch in response to the second selection signal. S21. The third selection signal S31 is supplied to the third switches 146, 156 and 166 of the first to third switch groups 140, 150 and 160, respectively, such that the third switches 146, 156 and 166 can be controlled to switch in response to the third selection signal. S31. The fourth selection signal S41 is supplied to the fourth switches 148, 158 and 168 of the first to third switch groups 140, 150 and 160, respectively, such that the fourth switches 148, 158 and 168 can be controlled to switch in response to the fourth selection signal. S41.

More specifically, the first selection signal S11 includes first to third pulses P11, P12 and P13 having a high level. The first pulse P11 is supplied to the first switch 142 of the first switch group 140, the second pulse P12 is supplied to the first switch 152 of the second switch group 150, and the third pulse P13 is supplied to the third switch group 160. The first switch 162.

The second selection signal S21 includes first to third pulses P21, P22, and P23 having a high potential. The first pulse P21 is supplied to the second switch 144 of the first switch group 140, the second pulse P22 is supplied to the second switch 154 of the second switch group 150, and the third pulse P23 is supplied to the third switch group 160. The second switch 164.

The third selection signal S31 includes first to third pulses P31, P32, and P33 having a high potential. The first pulse P31 is supplied to the third switch 146 of the first switch group 140, the second pulse P32 is supplied to the third switch 156 of the second switch group 150, and the third pulse P23 is supplied to the third switch group 160. The third switch 166.

The fourth selection signal S41 includes first to third pulses P41, P42, and P43 having a high potential. The first pulse P41 is supplied to the fourth switch 148 of the first switch group 140, the second pulse P42 is supplied to the fourth switch 158 of the second switch group 150, and the third pulse P43 is supplied to the third switch group 160. The fourth switch 168.

As shown in FIG. 8, the first pulse P11 of the first selection signal S11, the first pulse P21 of the second selection signal S21, the first pulse P31 of the third selection signal S31, and the first of the fourth selection signal P41 are successively generated. a pulse P41, and a first pulse P11 of the first selection signal S11, a first pulse P21 of the second selection signal S21, a first pulse P31 of the third selection signal S31, and a fourth selection signal P41 A pulse P41 sequentially turns on the first to fourth switches 142, 144, 146 and 148 of the first switch group 140.

The second pulse P21 of the first selection signal S11, the second pulse P22 of the second selection signal S21, the second pulse P32 of the third selection signal S31 and the second pulse P42 of the fourth selection signal P41 are successively generated, and The second pulse P21 of the first selection signal S11, the second pulse P22 of the second selection signal S21, the second pulse P32 of the third selection signal S31 and the second pulse P42 of the fourth selection signal P41 are sequentially turned on. The first to fourth switches 152, 154, 156 and 158 of the switch block 150.

The third pulse P13 of the first selection signal S11, the third pulse P23 of the second selection signal S21, the third pulse P33 of the third selection signal S31, and the third pulse P43 of the fourth selection signal P41 are successively generated, and The third pulse P13 of the first selection signal S11, the third pulse P23 of the second selection signal S21, the third pulse P33 of the third selection signal S31, and the third pulse P43 of the fourth selection signal P41 are sequentially turned on. The first to fourth switches 162, 164, 166 and 168 of the switch block 160.

As shown in FIG. 9A, the first switch 142 of the first switch group 140 is turned on in response to the first pulse P11 of the first selection signal S11, and the first switch 142 and the first sensing line 121a via the first switch group 140. The first driving signal S1 shown in FIG. 12 is supplied to the first sensing region 111a of the first sensing region block 170a. As a result, the first sensing area 111a of the first sensing area block 170a is activated, and the sensing signal reflects the capacitance change caused by the touch input of the user with respect to the first sensing area 111a, and the sensing signal passes through the first sense. The line 121a and the first switch 142 are supplied to the first sensing signal detecting unit 104a. In this case, the second to fourth switches 144, 146, and 148 are turned off.

As shown in FIG. 9B, the second switch 144 of the first switch group 140 is turned on in response to the first pulse P21 of the second selection signal S21, and the second drive signal S2 as shown in FIG. 12 is via the first switch group. The second switch 144 and the second sensing line 121b of 140 are supplied to the second sensing area 111b of the first sensing area block 170a. As a result, the second sensing region 111b of the first sensing region block 170a is activated, and the sensing signal reflects the capacitance change caused by the touch input of the user with respect to the second sensing region 111b, and the sensing signal is via the second sense. The line 121b and the second switch 144 are supplied to the first sensing signal detecting unit 104a. In this case, the first, third and fourth switches 142, 146 and 148 are turned off.

As shown in FIG. 9C, the third switch 146 of the first switch group 140 is turned on in response to the first pulse P31 of the third selection signal S31, and the third drive signal S3 shown in FIG. 12 is passed through the first switch group 140. The third switch 146 and the third sensing line 121c are supplied to the third sensing region 111c of the first sensing region block 170a. As a result, the third sensing area 111c of the first sensing area block 170a is activated, and the sensing signal reflects the capacitance change caused by the touch input of the user with respect to the third sensing area 111c, and the sensing signal is via the third sense. The line 121c and the third switch 146 are supplied to the first sensing signal detecting unit 104a. In this case, the first, second, and fourth switches 142, 144, and 148 are turned off.

As shown in FIG. 9D, the fourth switch 148 of the first switch group 140 is turned on in response to the first pulse P41 of the fourth selection signal P41, and the fourth drive signal S4 shown in FIG. 12 is via the first switch group 140. The fourth switch 148 and the fourth sensing line 121d are supplied to the fourth sensing area 111d of the first sensing area block 170a. As a result, the fourth sensing area 111d of the first sensing area block 170a is activated, and the sensing signal reflects the capacitance change caused by the touch input of the user with respect to the fourth sensing area 111d, and the sensing signal is via the fourth sense. The line 121d and the fourth switch 148 are supplied to the first sensing signal detecting unit 104a. In this case, the first to third switches 142, 144, and 146 are turned off.

Although not shown in the figure, the second pulse P21 of the first selection signal S11, the second pulse P22 of the second selection signal S21, the second pulse P32 of the third selection signal S31, and the second pulse P42 of the fourth selection signal P41 are successively It is supplied such that the first to fourth switches 152, 154, 156 and 158 of the second switch group 150 are successively turned on. As a result, the sensing signals reflecting whether the user touches the first to fourth sensing regions 112a to 112d of the second sensing region block 180a are supplied to the first sensing signal detecting unit 104a.

Although not shown in the figure, the third pulse P13 of the first selection signal S11, the third pulse P23 of the second selection signal S21, the third pulse P33 of the third selection signal S31, and the third pulse P43 of the fourth selection signal P41 are successively successive. It is supplied such that the first to fourth switches 162, 164, 166 and 168 of the third switch group 160 are successively turned on. As a result, the sensing signals reflecting whether the user touches the first to fourth sensing regions 113a to 113d of the third sensing region block 190a are supplied to the first sensing signal detecting unit 104a.

Although not shown in the drawing, the selection signals S11, S21, S31, and S41 shown in Fig. 8 are also supplied to the second selection circuit 102b. As a result, the second selection circuit 102b is selectively driven by the selection signals S11, S21, S31 and S41 shown in Fig. 8 in the same manner as the selective driving of the first selection circuit 102a.

As described above, the plurality of sensing regions 111a to 111d, 112a to 112d, and 113a to 113d of the respective sensing region blocks 170a, 180a, and 190a are successively activated in accordance with the finger pattern. In the finger mode, direct contact occurs between the user and the sensing areas 111a to 111d, 112a to 112d, and 113a to 113d, and between the sensing areas 111a to 111d, 112a to 112d, and 113a to 113d and the user's finger The distance becomes zero. As a result, the capacitances of the respective sensing regions 111a to 111d, 112a to 112d, and 113a to 113d are sufficiently large, and the transmission of the respective sensing regions 111a to 111d, 112a to 112d, and 113a to 113d may be sufficient to detect whether a user's touch occurs. .

Suspend mode drive

A driving method of a floating mode associated with a touch sensing device will be described with reference to FIGS. 5 to 7 and FIGS. 10, 11A, and 11B.

FIG. 10 is a waveform diagram of a floating mode driving related to the touch sensing device of the present invention, and FIG. 11A and FIG. 11B are schematic diagrams of the floating mode driving associated with the touch sensing device of the present invention.

As shown in FIG. 10, two selection signals S12 and S22 are successively generated, and the first to third switch groups 140, 150 and 160 included in the first selection circuit 102a are switched by the two selection signals S12 and S22. First to fourth switches 142 to 148, 152 to 158, and 162 to 168.

For example, the first selection signal S12 is simultaneously supplied to the first switch 142 and the second switch 144 of the first switch group 140, the first switch 152 and the second switch 154 of the second switch group 150, and the third switch group 160. The first switch 162 and the second switch 164 can simultaneously switch between the first switch 142 and the second switch 144 of the first switch group 140, the first switch 152 and the second switch 154 of the second switch group 150, and the third The first switch 162 and the second switch 164 of the switch group 160. The second selection signal S22 is simultaneously supplied to the third switch 146 and the fourth switch 148 of the first switch group 140, the third switch 156 and the fourth switch 158 of the second switch group 150, and the third switch of the third switch group 160. 166 and the fourth switch 168, so that the third switch 146 and the fourth switch 148 of the first switch group 140, the third switch 156 and the fourth switch 158 of the second switch group 150, and the third switch group 160 can be simultaneously switched. The third switch 166 and the fourth switch 168.

As shown in FIG. 11A, the first selection signal S12 is simultaneously supplied to the first to third switch groups 140, 150, and 160 of the first selection circuit 102a. Responding to the first selection signal S12, simultaneously opening the first switch 142 and the second switch 144 of the first switch group 140, the first switch 152 and the second switch 154 of the second switch group 150, and the first of the third switch group 160 The switch 162 and the second switch 164. As a result, the first switch 142 and the second switch 144 of the first switch group 140, the first switch 152 and the second switch 154 of the second switch group 150, and the first switch 162 and the second switch 164 of the third switch group 160 The first driving signal S1 and the second driving signal S2 shown in FIG. 12 are respectively supplied to the first and second sensing regions 111a, 111b of the first to third sensing region blocks 170a, 180a and 190a, 112a, 112b, 113a and 113b. In this case, the first switch 142 and the second switch 144 of the first switch group 140, the first switch 152 and the second switch 154 of the second switch group 150, and the first switch 162 and the third switch group 160 The second switch 164 defines a first suspension as a result of simultaneously activating the first and second sensing regions 111a, 111b, 112a, 112b, 113a and 113b of the first to third sensing region blocks 170a, 180a and 190a, respectively. Block 200a is activated. The first floating active block 200a includes six activated sensing regions; as a result, the total number of capacitances connected to the respective sensing regions is accumulated and becomes six times the capacitance of the single sensing region, and the sensing sensitivity is also increased by six times; This makes it possible to easily detect whether or not a user's touch is possible even in a floating mode in which the user does not directly contact the display panel 10.

Based on the improved touch sensitivity of the first suspension active block 200a, the sensing signal reflects whether a non-direct touch of the user occurs in the floating mode, and the sensing signal is supplied to the first sensing signal detecting unit 104a.

As shown in FIG. 11B, the second selection signal S22 is simultaneously supplied to the first to third switch groups 140, 150, and 160 of the first selection circuit 102a. Responding to the second selection signal S22, simultaneously opening the third switch 146 and the fourth switch 148 of the first switch group 140, the third switch 156 and the fourth switch 158 of the second switch group 150, and the third switch group 160 The switch 166 and the fourth switch 168. As a result, the third switch 146 and the fourth switch 148 of the first switch group 140, the third switch 156 and the fourth switch 158 of the second switch group 150, and the third switch 166 and the fourth switch 168 of the third switch group 160 The third driving signal S3 and the fourth driving signal S4 shown in FIG. 12 are respectively supplied to the third and fourth sensing regions 111c, 111d of the first to third sensing region blocks 170a, 180a and 190a, 112c, 112d, 113c and 113d. In this case, the third switch 146 and the fourth switch 148 of the first switch group 140, the third switch 156 and the fourth switch 158 of the second switch group 150, and the third switch 166 and the third switch group 160 The four switches 168 define a second suspension as a result of simultaneously activating the third and fourth sensing regions 111c, 111d, 112c, 112d, 113c, and 113d of the first to third sensing region blocks 170a, 180a, and 190a, respectively. Block 200b is activated. The second suspension active block 200b includes six activated sensing regions; as a result, the total number of capacitances connected to the respective sensing regions is accumulated and becomes six times the capacitance of the single sensing region, and the sensing sensitivity is also increased by six times. This makes it possible to easily detect whether or not a user's touch is possible even in a floating mode in which the user does not directly contact the display panel 10.

Each of the suspension activation blocks 200a and 200b is at least two sensing regions that are simultaneously activated.

Although not shown in the figures, each of the floating active blocks 200a and 200b may be defined as a first sensing area block 170a. For example, the first to fourth sensing regions 111a to 111d in the first sensing region block 170a are defined as the first floating active block and are simultaneously activated. Thereafter, the first to fourth sensing regions 112a to 112d in the second sensing region block 180a are defined as the second floating active block and are simultaneously activated. Thereafter, the first to fourth sensing regions 113a to 113d in the third sensing region block 190a are defined as the third floating active block and are simultaneously activated.

Although not shown, the same floating mode driving scheme for driving the first selection circuit 102a shown in FIGS. 11A and 11B is applied to the floating driving scheme by driving the second selection circuit 102b.

Although not shown in the figure, four selection signals are successively generated. Unlike the tenth figure, the first switches 142, 152 and 162 of the first to third switch groups 140, 150 and 160 are simultaneously turned on by the first selection signal, respectively. Thus, via the first switches 142, 152 and 162 of the first to third switch groups 140, 150 and 160 and the corresponding sensing lines 121a, 122a and 123a, the driving signals simultaneously activate the first sensing regions 111a, 112a and 113a, respectively. . Simultaneously opening the second switches 144, 154 and 164 of the first to third switch groups 140, 150 and 160 by the second selection signal, respectively, via the second switches of the first to third switch groups 140, 150 and 160, respectively. 144, 154 and 164 and corresponding sensing lines 121b, 122b and 123b drive the signals simultaneously to drive the second sensing regions 111b, 112b and 113b, respectively. Simultaneously opening the third switches 146, 156 and 166 of the first to third switch groups 140, 150 and 160 through the third selection signal, respectively, via the third switches 146 of the first to third switch groups 140, 150 and 160, respectively. 156 and 166 and corresponding sensing lines 121c, 122c and 123c, the driving signals simultaneously activate the third sensing regions 111c, 112c and 113c. Simultaneously opening the fourth switches 148, 158 and 168 of the first to third switch groups 140, 150 and 160 through the fourth selection signal, respectively, such that the fourth switches of the first to third switch groups 140, 150 and 160, respectively 148, 158 and 168 and corresponding sensing lines 121d, 122d and 123d, the driving signals simultaneously activate the fourth sensing regions 111d, 112d and 113d.

In the above suspension mode, it is detected whether a touch occurs, and the user's finger is kept at a predetermined distance from the sensing areas 111a to 1113, 112a to 112d, and 131a to 113d without being in contact therewith. In this case, as the distance between the sensing regions 111a to 1113, 112a to 112d, and 131a to 113d and the user's finger increases as compared with the floating mode, the respective sensing regions 111a to 1113, 112a to 112d, and 131a The capacitance to 113d drops significantly. In accordance with the present invention, a plurality of sensing regions are activated such that it is sufficient to sense whether a touch has occurred in the floating mode, and the increased capacitance of the total sensing region enhances the sensing capability.

In addition, according to the present invention, both the finger mode and the sensing mode can be driven, so that not only the touch detection by the user's direct contact is possible, but also the touch detection by the contact contact, that is, the non-contact touch. Measurements are also possible, extending the range of use of touch sensing devices.

Hereinafter, the above-described touch driving scheme will be briefly described again, an example for contacting the touch driving and the non-contact touch driving will be described, and a no-load driving scheme will be described, and the touch is improved by removing any unnecessary parasitic capacitance. Sensing accuracy, thereby solving the problem of deterioration of touch sensing accuracy caused by the occurrence of unnecessary parasitic capacitance.

The display device of the present invention provides a touch mode, and the touch mode can be mainly divided into a touch touch mode and a non-contact touch mode.

The touch touch mode refers to a mode in which the touch is directly recognized by the touch panel, which is also referred to as a finger mode.

The non-contact touch mode refers to a mode in which the touch is recognized on the display panel that is not directly in contact, and includes a proximity touch mode and a floating mode. The proximity touch of the contactless display panel in the adjacent touch mode is recognized, in the floating mode. The touch caused by floating above the display panel is recognized.

The touch sensing device of the present invention comprises a display panel (10), a touch sensing circuit 100, and the like. The display panel (10) includes a plurality of touch sensors TS, and the touch sensing circuit 100 drives multiple touches. Control the sensor TS and sense the touch.

The touch sensing circuit 100 includes a sensing signal detecting unit 104, a selection circuit 102, and the like. The sensing signal detecting unit 104 supplies the driving signals for touch recognition to the plurality of touch sensors TS, and detects the sensing signals through the plurality of touch sensors TS. The selection circuit 102 is configured to electrically connect different numbers of touch sensors TS to the sensing signal detecting unit 104 in the case of contacting the touch driving and the non-contact touch driving.

In the case of contacting the touch driving, the selection circuit 102 sequentially electrically connects the plurality of touch sensors TS to the sensing signal detecting unit 104.

In the case of the non-contact touch driving, the selection circuit 102 simultaneously electrically connects two or more of the plurality of touch sensors TS to the sensing signal detecting unit 104.

The sensing signal detecting unit 104 includes one or more detecting units.

The selection circuit 102 includes one or more multiplexers corresponding to and connected to one or more detection units.

Each of the one or more multiplexers includes a plurality of switch groups.

Each of the plurality of switch groups includes a plurality of switches electrically connecting the plurality of touch sensors TS.

The plurality of switches are connected to the plurality of output lines by using a plurality of sensing lines connected to the plurality of touch sensors TS, and the plurality of output lines are connected to the sensing signal detecting unit 104.

In response to the selection signal, each of the plurality of switches selectively connects the corresponding output line to the corresponding sense line.

In the case of contact touch (the touch is recognized as the finger mode), the sensing signal detecting unit 104 is at a specific timing as all the switches included in one or at least two multiplexers are successively turned on one after another. The drive signal is supplied to the connected touch sensor TS.

In the case of contactless touch (for example, the touch is recognized as the hover mode), each of the switches included in one or at least two of the plurality of switches is turned on together, sensing The signal detecting unit 104 supplies the driving signals to all two or more touch sensors TS connected together at a specific timing.

In the case of contacting the touch driving, at a certain point in time, the selection circuit 102 connects one touch sensor TS to the sensing signal detecting unit 104, and in the case of the non-contact touch driving, at a certain point in time. The selection circuit 102 is connected to the two or more touch sensors TS to the sensing signal detecting unit 104.

In the case of a non-contact touch drive, the selection circuit 102 adaptively changes the number of touch sensors TS connected to the sense signal detecting unit 104 in accordance with the occurrence of an event. In this regard, the control signal automatically increases or decreases the number of touch sensors, and according to the user setting input event or by controlling the signal occurrence event, thereby improving the sensing accuracy and the touch driving efficiency, The result of a non-contact touch drive.

The touch sensing circuit 100 of the present invention includes a sensing signal detecting unit 104, a selection circuit 102, and the like. The sensing signal detecting unit 104 sequentially outputs the driving signals to be applied to the plurality of touch sensors TS, and detects the sensing signals through the plurality of touch sensors TS. The selection circuit 102 is configured to electrically connect different numbers of touch sensors TS to the sensing signal detecting unit 104 in the case of contacting the touch driving and the non-contact touch driving.

In the case of contacting the touch driving, the sensing signal detecting unit 104 outputs a driving signal at a specific timing, and the driving signal is applied to a touch sensor TS.

In the case of the non-contact touch driving, the sensing signal detecting unit 104 outputs a driving signal at a specific timing, and the driving signal is applied to the two or more touch sensors TS.

In the case of contacting the touch driving, the selection circuit 102 sequentially connects the plurality of touch sensors TS to the sensing signal detecting unit 104 one by one.

In the case of the non-contact touch driving, the selection circuit 102 is electrically connected to each of the two or more of the plurality of touch sensors TS to the sensing signal detecting unit 104.

In the case of contact with the touch drive and in the case of the non-contact touch drive, the selection circuit 102 is implemented as at least one multiplexer for electrically connecting different numbers of touch sensors TS to the sensing signal detection. Unit 104.

The selection circuit 102 includes a plurality of switches for switching the connection between the plurality of touch sensors TS and the sensing signal detecting unit 104 in response to the selection signal.

In the case of contacting the touch driving, the plurality of switches are sequentially turned on one after another, and the sensing signal detecting unit 104 outputs a driving signal to the touch sensor TS at a specific timing, and the touch sensor TS transmits The switches that have been turned on are electrically connected.

In the case of a non-contact touch drive, two or more of the plurality of switches are sequentially turned on one after another, and the sensing signal detecting unit 104 outputs the driving signal to two or more touch senses at a specific timing. The detector TS, two or more touch sensors TS are electrically connected through two or more switches that have been turned on.

The touch sensing circuit 100 of the present invention electrically connects the plurality of touch sensors TS arranged on the display panel 10, and sequentially supplies the driving signals to the plurality of touch sensors TS in the touch driving mode; the touch sensing The circuit 100 supplies the driving signal to a touch sensor TS at a specific timing in the case of contacting the touch driving, and supplies the driving signal to two or more touches at a specific timing in the case of the non-contact touch driving. Sensor TS.

The touch sensing circuit 100 of the present invention is electrically connected to the plurality of touch sensors TS arranged on the display panel 10 through a plurality of sensing lines, and the driving signals are sequentially supplied to the plurality of touch sensors TS in the touch driving mode; In particular, the touch sensing circuit 100 supplies the driving signals to the two or more touch sensors TS at a specific timing.

The two or more touch sensors TS are touch sensors arranged in an adjacent position on the display panel 10.

The two or more touch sensors TS are adjacent to each other in the direction of the sensing line or in a direction different from the direction of the sensing line.

For example, the two or more touch sensors TS may be touch sensors arranged in an adjacent position in a direction parallel to the sensing line; may be arranged in an adjacent position along a direction perpendicular to the sensing line The sensor is controlled; or may include at least one touch sensor arranged in an adjacent position in a direction parallel to the sensing line, and at least one touch sensor arranged in an adjacent position in a direction perpendicular to the direction of the sensing line.

In this regard, the sensing line connecting the touch sensor TS and the touch sensing circuit 100 is, for example, parallel to the data line or parallel to the gate line.

The touch sensing circuit 100 of the present invention electrically connects the plurality of touch sensors TS arranged on the display panel 10, and sequentially supplies the driving signals to the plurality of touch sensors TS during the touch driving and detects whether the touch sensor has appeared. In particular, in the case of contacting the touch driving, the touch sensing circuit 100 detects whether a touch has occurred for each sensing area corresponding to one touch sensor TS, and is in a non-contact touch. In the case of the control drive, it is detected whether a touch has occurred for each block corresponding to the two or more touch sensors TS.

The touch sensing circuit 100 of the present invention described above is implemented as a touch integrated circuit.

In some cases, the touch sensing circuit 100 of the present invention is an internal circuit implemented as a data driving circuit 24 of a data driving integrated circuit chip.

On the other hand, in the case of contacting the touch driving, the driving signal is applied to one touch sensor TS at a specific time point, but in the case of the non-contact touch driving, the driving signal is applied to two or A plurality of touch sensors; thus, a larger load occurs during the non-contact touch drive and a non-clear drive signal is applied to the touch sensor than the touch control.

Therefore, the same driving signal is used during the contact touch driving period and the non-contact touch driving period, and the touch sensing accuracy during the non-contact touch driving is deteriorated.

Therefore, the present invention provides a method of using different driving signals instead of using the same driving signal during contact touch driving and non-contact touch driving.

For example, in the case of the non-contact touch driving, the driving signal Vh outputted by the touch sensing circuit 100 and supplied to the plurality of touch sensors TS includes the overdrive period OP.

The overdrive voltage Vover of the drive signal Vh in the overdrive period OP changes according to the position of the touch sensor TS to which the drive signal Vh is supplied. The overdrive voltage Vover means the degree of overdrive.

For example, the overdrive voltage Vover of the driving signal Vh is related to the device that supplies the driving signal Vh (the touch sensing circuit 100 or the data driving circuit 24 including the touch sensing circuit 100) and the touch that is supplied with the driving signal Vh. The distance between the sensors TS increases in proportion. This is because the farther the touch sensor TS is from the device that supplies the driving signal Vh (the touch sensing circuit 100 or the data driving circuit 24 including the touch sensing circuit 100), the more the load (corresponding to the RC value) becomes. Large, and the drive signal Vh that needs to be supplied with a higher overdrive.

Accordingly, in the case of the non-contact touch driving, the driving signal Vh output by the touch sensing circuit 100 and supplied to the plurality of touch sensors TS is higher than that in the case of touching the touch driving (finger mode driving). The driving signal Vf outputted by the touch sensing circuit 100 and supplied to the plurality of touch sensors TS has a larger signal intensity.

FIG. 13 is a schematic diagram of a display driving mode and a touch driving mode according to the present invention, and FIGS. 14 and 15 are schematic diagrams showing a pulse of a driving signal used in the touch driving mode of the present invention.

Referring to FIG. 13, the display device of the present invention operates in a display driving mode or a touch driving mode.

Referring to FIG. 13, the touch driving mode is divided into a touch touch driving mode and a non-contact touch driving mode. The non-contact touch driving mode used herein refers to a touch driving mode including the concept of all floating modes, adjacent touch driving modes and the like.

Please refer to FIG. 14 and FIG. 15 . In the non-contact touch driving mode, the driving signal Vf is used as a reference waveform in a driving signal Vh whose timing is supplied to two or more touch sensors TS, wherein the driving is performed. The signal Vf is supplied to the plurality of touch sensors TS when the touch driving mode is contacted, and the driving signal Vf is driven the same as the overdriving voltage Vover during the predetermined over driving period OP compared to the reference waveform. More signals.

For example, referring to FIG. 14, the overdrive period OP associated with one pulse of the drive signal Vh in the non-contact touch drive mode corresponds to the entire width HP of one pulse.

As another example, referring to FIG. 15, the overdrive period OP associated with one pulse of the drive signal Vh in the non-contact touch drive mode corresponds to a portion of the entire width HP of one pulse.

16A to 16D show four more examples of the drive signals Vf and Vh in each of the touch touch drive mode (finger mode) and the non-contact touch drive mode of the present invention.

In the case of the example shown in FIG. 16A, the driving signal generated and output by the touch sensing circuit 100 changes according to the touch driving mode (contact touch driving mode, non-contact touch driving mode).

Referring to FIG. 16A, the driving signal Vf supplied to the plurality of touch sensors TS in the case of contacting the touch driving mode is a modulated pulse having a repeated low level period LP and a repeated high level period HP, and the low level period LP There is a reference voltage Vo, and the high level period HP has a driving voltage Vd higher than the reference voltage Vo.

Referring to FIG. 16A, the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving is a modulation pulse having a repeated low level period LP and a repeated high level period HP, wherein the low level period The LP has a reference voltage Vo, and the high level period HP has a voltage Vd+Vover, Vd higher than the reference voltage Vo.

Please refer to FIG. 16A. Regarding the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving, the high level period HP includes the overdrive period OP and the normal high level period NHP.

Regarding the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving, the overdrive period in the high level period HP and the OP have the overdrive driving period Vd+Vover, which is higher than the driving voltage Vd. Overdrive voltage Vover.

Regarding the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving, the normal high level period NHP in the high level period HP has a driving voltage Vd higher than the reference voltage Vo.

In the case of another example shown in FIG. 16B, the driving signal generated and output by the touch sensing circuit 100 is changed according to the touch driving mode (contact touch driving mode, non-contact touch driving mode).

Referring to FIG. 16B, the driving signal Vf supplied to the plurality of touch sensors TS in the case of contacting the touch driving is a modulation pulse having a repeated low level period LP and a repeated high level period HP, wherein the low level period The LP has a reference voltage Vo, and the high level period HP has a driving voltage Vd higher than the reference voltage Vo.

Referring to FIG. 16B, the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving is a modulation pulse having a repeated low level period LP and a repeated high level period HP, wherein the low level period The LP has a reference voltage Vo, and the high level period HP has a voltage Vd+Vover, Vd higher than the reference voltage Vo.

During the first driving period Tover of the touch driving period (non-contact touch driving period) in the frame period, the high level period HP includes the over driving period OP and the normal high level period NHP.

During the second driving period Tnormal of the touch driving period (non-contact touch driving period) in the frame period, the high level period HP uniquely includes the normal high level period NHP.

Referring to FIG. 16B, for the driving signal Vh supplied to the plurality of touch sensors TS during the non-contact touch driving period in the frame period, the normal high level period NHP has a driving voltage Vd higher than the reference voltage Vo. Voltage (voltage required for touch sensing).

The driving period Vover is supplied to the driving signals Vh of the plurality of touch sensors TS during the first driving period Tover of the touch driving period (non-contact touch driving period) in the frame period, and the over driving period OP has the over driving driving voltage Vd+ Vover is higher than the driving voltage Vd by the driving voltage Vover.

In the case of another example shown in FIG. 16C, the driving signal generated and output by the touch sensing circuit 100 is changed according to the touch driving mode (contact touch driving mode, non-contact touch driving mode).

Referring to FIG. 16C, in the case of contacting the touch driving, the driving signal Vf supplied to the plurality of touch sensors TS is a modulation pulse having a repeated low level period LP and a repeated high level period HP.

Regarding the driving signal Vf supplied to the plurality of touch sensors TS in the case of the touch driving period, the high level period HP is a normal high level period NHP, has a high level driving voltage Vpd higher than the reference voltage Vo, and a low level The period LP is a normal low level period NLP having a low level driving voltage Vnd lower than the reference voltage Vo.

Referring to FIG. 16C, in the case of the non-contact touch driving, the driving signal Vh supplied to the plurality of touch sensors TS is a modulation pulse having a repeated low level period LP and a repeated high level period HP.

Please refer to FIG. 16C. Regarding the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving, the high level period HP includes the high level overdrive period HOP and the normal high level period NHP.

In this regard, regarding the non-contact touch driving, the high leveling period HP of the driving signal Vh supplied to the plurality of touch sensors TS, the high level overdriving period HOP has a high level overdriving driving voltage Vpd+ Vover is higher than the high level drive voltage Vpd by the drive voltage Vover.

In addition, regarding the high-level period HP of the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving, the normal high level period NHP has a high level driving voltage Vpd, which is higher than the reference voltage Vo. Control the required voltage.

Regarding the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving, the low level period LP includes the low level overdrive period LOP and the normal low level period NLP.

In this regard, with respect to the low-level period LP of the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving, the low-level over-driving period LOP has the low-level overdriving driving voltage Vnd- Vover, the low-level quasi-drive drive voltage Vnd-Vover is lower than the low-level drive voltage Vnd by the overdrive voltage Vover.

In addition, regarding the low-level period LP of the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving, the normal low level voltage NLP has a low level driving voltage Vnd which is lower than the reference voltage Vo.

In the case of the other example shown in FIG. 16D, the driving signal generated and output by the touch sensing circuit 100 is changed according to the touch driving mode (contact touch driving mode, non-contact touch driving mode).

Referring to FIG. 16D, the driving signal Vf supplied to the plurality of touch sensors TS in the case of contacting the touch driving is a modulation pulse having a repeated low level period LP and a repeated high level period HP.

Regarding the driving signal Vf supplied to the plurality of touch sensors TS in the case of contacting the touch driving, the high level period HP is a normal high level period NHP, has a high level driving voltage Vpd higher than the reference voltage Vo, and a low level The period LP is a normal low level period NLP having a low level driving voltage Vnd lower than the reference voltage Vo.

Referring to FIG. 16D, the driving signal Vh supplied to the plurality of touch sensors TS in the case of the non-contact touch driving is a modulation pulse having a repeated low level period LP and a repeated high level period HP.

Referring to FIG. 16D, during the first driving period Tover of the non-contact touch driving period, the high level period HP includes a high level overdrive period HOP and a normal high level period NHP, and the low level period LP includes a low level overdrive period LOP. NLP with normal low level quasi-period.

Referring to FIG. 16D, during the second driving period Tnormal of the non-contact touch driving period, the high level period HP uniquely includes the normal high level period NHP, and the low level period period LP uniquely includes the normal low level period period NLP.

The high-order overdrive period HOP has a high-level overdrive driving voltage Vpd+Vover, which is higher than the high-level driving voltage Vpd by the over-driving voltage Vover, and the normal high-leveling period NHP has a high-level driving voltage Vpd higher than the reference voltage Vo.

The low-order overdrive period LOP has a low-level overdrive driving voltage Vnd-Vover, which is lower than the low-level driving voltage Vnd by the over-driving voltage Vover, and the normal low-leveling period NLP has a low-level driving voltage Vnd lower than the reference voltage Vo.

As described above, the plurality of touch sensors TS are supplied with a display driving voltage (for example, a common voltage corresponding to the pixel voltage and forming an electric field) during the display driving period, and are supplied with the touch touch during the contact touch driving period. The driving signal Vf is supplied with the non-contact touch driving signal Vh during the non-contact touch driving period.

FIG. 17 is a schematic diagram showing the driving sequence when the frame period is performed as the display driving period D, the touch driving period TF and the non-contact touch driving period TH during the driving of the display device of the present invention.

Referring to FIG. 17, a frame (1 frame) cycle is divided into a display drive cycle D, a touch touch drive cycle TF, and a non-contact touch drive cycle TH.

A frame (1 frame) period has been divided into a display driving period D, each of the touch touch driving period TF and the non-contact touch driving period TH may have the same length (Ld=Lf=Lh), or at least one The periods have different lengths of time (at least one of Ld, Lf and Lh has a different value).

FIG. 18 is a schematic diagram showing the variable length characteristics when the frame period is performed as the display driving period D, the touch driving period TF and the non-contact touch driving period TH during the driving of the display device of the present invention.

Referring to FIG. 18, during the image display driving, the time length Lf of the contact touch driving period TF and the time length Lh of the non-contact touch driving period TH are adaptively changed with respect to each other.

For example, in the case where the touch is frequently encountered, the time length Lf of the touch touch driving period TF is controlled to be long, and the time length Lh of the non-contact touch driving period TH is controlled to be short.

As another example, in the case where the contactless touch occurs frequently, the time length Lf of the touch touch driving period TF is controlled to be short, and the time length Lh of the non-contact touch driving period TH is controlled to be long.

FIG. 19 is a diagram showing the driving period D and the touch driving period and the touch driving period according to the touch driving period TF and the non-contact touch driving period TH when the frame period is driven. A schematic diagram of the driving sequence at the time of execution.

Referring to FIG. 19, a frame period is divided into a display driving period D and a touch driving period TF, or is divided into a display driving period D and a non-contact touch driving period TH.

After the contact touch driving period TF in the first frame Frame #1, when it is determined that there is a touch touch, the second frame Frame #2 following the first frame Frame #1 is divided into a display driving period D and a contact touch. Control drive cycle TF.

When it is determined that there is no contact touch, the second frame Frame #2 following the first frame Frame #1 is divided into a display driving period D and a non-contact touch driving period TH.

Figure 20 is a schematic diagram showing parasitic capacitances Cp1 and Cp2 and a load-free driving (LFD) scheme occurring during driving of the display device of the present invention. The no-load driving scheme is capable of removing unnecessary parasitic capacitance Cp1. A driving scheme that improves the touch sensing accuracy with Cp2, and is used to improve touch sensing errors caused by unnecessary parasitic capacitances Cp1 and Cp2.

The above described no-load drive scheme is defined as a drive that removes any load that degrades touch sensing accuracy. The load-free driving is performed together with the main touch driving, and the driving signals are sequentially applied to the plurality of touch sensors TS for the touch driving main touch driving.

In this regard, the parasitic capacitance that does not need to be formed generates a load, and the load degrades the touch sensing accuracy rate, except for the capacitance between the pointer that must be formed for touch sensing and the touch sensor TS. The driving signals are successively applied to the plurality of touch sensors TS to perform touch driving between other patterns (for example, data lines and gate lines) inside the display panel 10 and the plurality of touch sensors TS. In the case of a touch sensing scheme according to the amount of change in capacitance, such a parasitic capacitance changes the amount of change in capacitance, thereby degrading the touch accuracy.

Referring to FIG. 20, although the driving signals Vf and Vh are supplied to a touch sensor TS during the touch driving, a parasitic capacitance Cp1 is formed between the touch sensor TS and the data line DL. A parasitic capacitance Cp2 is formed between the touch sensor TS and the gate line GL.

The parasitic capacitances Cp1 and Cp2 are used as loads related to touch driving and touch sensing, and cause touch sensing errors.

In this regard, the present invention provides a touch driving method capable of reducing a load by removing unnecessary parasitic capacitances Cp1 and Cp2.

According to the loadless touch driving method of the present invention, the driving signal is supplied to the plurality of touch sensors TS, and the unloaded driving signal LFDdl having the same phase as the driving signals Vf and Vh is supplied to at least one of the arrays arranged on the display panel 10. Data line DL.

According to the loadless touch driving method of the present invention, the driving signal is supplied to the plurality of touch sensors TS, and the unloaded driving signal LFDgl having the same phase as the driving signals Vf and Vh is supplied to at least one of the arrays arranged on the display panel 10. Gate line GL.

In this regard, the unloaded driving signals LFDd1 and LFDgl have signal strength and signal shape corresponding to the signal strength and signal shape of the driving signals Vf and Vh, and the driving signals Vf and Vh are respectively related to the non-contact touch driving. Contact the touch drive.

Therefore, during the touch driving periods TF and TH, the potential difference between the touch sensor TS and the data line DL and the potential difference between the touch sensor TS and the gate line can be reduced or eliminated, thereby reducing or removing The parasitic capacitance Cp1 between the touch sensor TS and the data line DL and the parasitic capacitance Cp2 between the touch sensor TS and the gate line. As a result, the sensing accuracy is improved.

The touch sensing circuit 100 of the present invention can be implemented as a separate touch integrated circuit.

In some cases, the touch sensing circuit 100 of the present invention is an internal circuit implemented as a data driving circuit 24 of the data driving integrated circuit chip.

Hereinafter, when the touch sensing circuit 100 is included in the data driving circuit 24, the data driving circuit 24 will be briefly described in conjunction with FIGS. 21 to 23.

Referring to FIG. 21 and FIG. 22, in addition to the data driving unit (not shown), the data driving circuit 24 includes a touch sensing circuit 100 and a multiplexer MUX.

Referring to FIG. 23, in addition to the data driving unit (not shown), the data driving circuit 24 includes two or more touch sensing circuits 100-1 and 100-2 and two or more multiplexers MUX.

Referring to FIG. 21 to FIG. 23, the data driving circuit 24 of the present invention electrically connects a plurality of data lines arranged on the display panel 10 through a plurality of sensing lines SL, and electrically connects the plurality of touches arranged on the display panel 10. Control sensor TS.

The data driving circuit 24 of the present invention outputs the data voltage to the plurality of data lines during the display driving mode, and successively supplies the driving signals to the plurality of touch sensors TS during the touch driving mode.

The data driving circuit 24 of the present invention supplies the driving signal Vf to a touch sensor TS at a specific timing in the case of contacting the touch driving, and supplies the driving signal Vh to the specific timing in the case of the non-contact touch driving. Two or more touch sensors TS.

In the case of a non-contact touch drive, the data driving circuit 24 of the present invention supplies a driving signal that is greater than the signal strength in the case of a touch driving.

The data driving circuit 24 of the present invention includes one or more multiplexers MUX for performing a switching operation to electrically connect one or more sensing lines of the plurality of sensing lines SL and the touch sensing circuit 100, so that the touch driving is performed. During the mode, the driving signal can be applied to one or more of the plurality of touch sensors TS.

The data driving circuit 24 of the present invention further includes different types of one or more multiplexers for switching, such that during the display driving mode, the common voltage is supplied to the plurality of touch sensors TS, and in the touch driving mode. During this period, the driving signals are successively supplied to the plurality of touch sensors TS.

The driving signals Vf or Vh are sequentially supplied to the plurality of touch sensors TS, and the data driving circuit 24 of the present invention supplies the unloaded driving signals LFDd1 having the same phase as the driving signals Vf or Vh to at least one of the arrays arranged on the display panel 10. Data line DL.

The data driving circuit 24 of the present invention electrically connects the plurality of data lines DL arranged on the display panel 10 and the plurality of touch sensors TS arranged on the display panel 10 through a plurality of sensing lines; the data driving circuit 24 is driven by the display. During the mode, the data voltage is outputted to the plurality of data lines DL, and the driving signals Vh are sequentially supplied to the plurality of touch sensors TS during the touch driving mode. In this manner, the driving signals Vh having the overdrive period OP are supplied at a specific timing. To two or more touch sensors TS.

In this regard, the two or more touch sensors TS supplied with the drive signal Vh having the overdrive period OP are touch sensors arranged adjacent to each other.

The two or more touch sensors TS supplied with the driving signal Vh having the overdrive period OP are touch sensors arranged adjacently in the direction of the sensing line.

The two or more touch sensors TS supplied with the driving signal Vh having the overdrive period OP are touch sensors arranged adjacently in a direction different from the direction of the sensing line.

The data driving circuit 24 of the present invention electrically connects the plurality of data lines DL arranged on the display panel 10 and the plurality of touch sensors TS arranged on the display panel 10; the data driving circuit 24 outputs the data voltage during the display driving mode. Up to a plurality of data lines DL, and successively supplying driving signals to the plurality of touch sensors TS during the touch driving to detect whether a touch has occurred.

As shown in FIG. 21, in the case of contacting the touch driving, the data driving circuit 24 of the present invention detects whether a touch has occurred with respect to each sensing area corresponding to one touch sensor TS.

As shown in FIG. 22 and FIG. 23, in the case of a non-contact touch driving, the data driving circuit 24 of the present invention detects each sensing area corresponding to two or more touch sensors TS. Whether the block has touched.

In the case of the non-contact touch driving, the data driving circuit 24 of the present invention supplies a driving signal larger than that of the touch driving.

Figure 24 is a diagram showing the driving timings of the plurality of multiplexers MUX 1, MUX 2, ..., MUX 5 of the touch sensing device of the present invention.

Figure 24 is a diagram showing a relationship related to the following case, wherein the touch sensing device of the present invention comprises five multiplexers MUX 1, MUX 2, ..., MUX 5, how to divide the display driving cycle when a frame period has been D. The five multiplexers MUX 1, MUX 2, ..., MUX 5 are used during each of the touch touch driving period TF and the non-contact touch driving period TH.

Referring to FIG. 24, during the display driving period D, the five multiplexers MUX 1, MUX 2, ..., MUX 5 complete the switching operation, so that the common voltage Vcom is applied to all of the plurality of touch sensors TS.

Referring to FIG. 24, during the touch touch driving period TF, five multiplexers MUX 1, MUX 2, ..., MUX 5 are successively operated, and the multiplexer of the job completes the switching operation, so that the driving signals are successively applied to A plurality of touch sensors TS corresponding thereto.

Referring to FIG. 24, during the non-contact touch driving period TH, one or at least two of the five multiplexers MUX 1, MUX 2, ..., MUX 5 are driven.

Figure 25 is a diagram showing the operation of the multiplexer MUX i (i = 1, 2, ..., 5) of the touch sensing device of the present invention.

Please refer to Figure 25, each multiplexer MUX i (i = 1, 2, ..., 5) of five multiplexers MUX 1, MUX 2, ..., MUX 5 is completed to meet each display drive cycle D, contact The operation of the touch driving period TF and the non-contact touch driving period TH.

Each multiplexer MUX i (i = 1, 2, ..., 5) has five channels CH1, CH2, ..., CH5. Specifically, each multiplexer MUX i (i=1, 2, . . . , 5) is electrically connected to the five touch sensors TS via five sensing lines SL.

Referring to FIG. 25, during the display driving period D, each multiplexer MUX i (i=1, 2, . . . , 5) shorts the five channels CH1 to CH5, and uses the common voltage Vcom via the five sensing lines SL. All five touch sensors TS are supplied. The common voltage Vcom is output from the common voltage application unit 2510 via the sub-multiplexer 2530.

Referring to FIG. 25, during the contact touch driving period TF, the five channels CH1 to CH5 are time-divided and changed with respect to the corresponding multiplexer MUX i (i=1, 2, ..., 5) operating in accordance with the job sequence. To drive the signal path.

Referring to FIG. 25, during the touch touch driving period TF, the corresponding multiplexer MUX i (i=1, 2, ..., 5) operating in the order of the job selects one channel from the five channels CH1 to CH5, and Connect the selected channel to the analog front end 2500 (short circuit). In this regard, the analog front end 2500 is included in the touch sensing circuit 100 or the data driving circuit 24 or is included in the touch sensing circuit 100 or the data driving circuit 24 .

Therefore, the corresponding multiplexer MUX i (i=1, 2, . . . , 5), in particular, the five channels CH1 to CH5 supply the driving signal outputted by the analog front end 2500 to the corresponding touch sensor via the selected channel. TS.

In this case, the corresponding multiplexer MUX i (i=1, 2, . . . , 5) receives the no-load drive signal output from the no-load drive unit 2520 via the sub-multiplexer 2530, and via the selection channel. The four remaining channels supply the input no-load drive signals to the four corresponding touch sensors TS.

Referring to FIG. 25, during the non-contact touch period TH, the corresponding multiplexer MUX i (i=1, 2, ..., 5) selects two or more channels from five channels CH1 to CH5, and will select The channel is shorted and two or more shorted channels are connected to the analog front end 2500.

Therefore, the corresponding multiplexer MUX i (i=1, 2, . . . , 5) supplies the driving signal outputted from the analog front end 2500 to two or more touch sensing via two or more selected channels. TS.

Therefore, the detailed description should not be construed as being limited to all aspects, but should be considered as an example. The scope of the present invention should be determined by reasonably interpreting the scope of the appended claims, and all modifications within the scope of the invention should be construed as being included in the scope of the invention.

POL1, POL2‧‧‧ polarizing plate
GLS1‧‧‧Upper substrate
GLS2‧‧‧ lower substrate
TS‧‧‧ touch sensor
PIX‧‧‧ pixel electrodes
10‧‧‧ display panel
20‧‧‧Printed circuit board
22‧‧‧Timing controller
24‧‧‧Data Drive Circuit
26‧‧‧ Position shifter
30‧‧‧Shift register
100‧‧‧Touch sensing circuit
RGB‧‧‧ digital video data
VGH‧‧‧ gate high voltage
VGL‧‧‧ gate low voltage
VST‧‧‧ starts pulse
CLK‧‧‧ clock signal
ST‧‧‧Start pulse
GCLK‧‧‧ first clock
MCLK‧‧‧ second clock
SYNC‧‧‧sync signal
1‧‧‧ pixel electrodes
2‧‧‧Common electrode
11‧‧‧Information line
12‧‧ ‧ gate line
Vcom‧‧‧Common voltage
Cst‧‧‧ storage capacitor
TFT‧‧‧thin film transistor
Clc‧‧‧Liquid Crystal Case
Vsync‧‧‧ vertical sync signal
T1‧‧‧ display panel drive cycle
T2‧‧‧ touch drive cycle
102‧‧‧Selection circuit
104‧‧‧Sense signal detection unit
111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c, 116d‧‧ Sensing area
121a, 121b, 121c, 121d, 122a, 122b, 122c, 122d, 123a, 123b, 123c, 123d, 124a, 124b, 124c, 124d, 125a, 125b, 125c, 125d, 126a, 126b, 126c, 126d‧‧ Sensing line
131a, 131b, 131c, 131d, 132a, 132b, 132c, 132d‧‧‧ output lines
170a, 180a, 190a, 170b, 180b, 190b‧‧‧ Sensing area blocks
104a‧‧‧First sensing signal detection unit
104b‧‧‧Second sensing signal detection unit
102a‧‧‧First selection circuit
102b‧‧‧Second selection circuit
140, 150, 160‧‧ ‧ switch group
142, 144, 146, 148, 152, 154, 156, 158, 162, 164, 166, 168‧ ‧ switches
200a, 200b‧‧‧suspension activation block
P11, P12, P13, P21, P22, P23, P31, P32, P33, P41, P42, P43‧‧ pulses
S11, S21, S31, S41, S12, S22‧‧‧ select signals
S1, S2, S3, S4‧‧‧ drive signals
Vf‧‧‧ drive signal
Vh‧‧‧ drive signal
HP‧‧ High order period
OP‧‧‧Overdrive cycle
Vover‧‧‧Overdrive voltage
LP‧‧‧low standard period
NHP‧‧‧normal high level quasi-period
Vd‧‧‧ drive voltage
Vo‧‧‧reference voltage
Tover‧‧‧First drive cycle
Tnormal‧‧‧second drive cycle
Vpd‧‧‧ high level drive voltage
Vnd‧‧‧low standard drive voltage
HOP‧‧‧ high position over the driving cycle
LOP‧‧‧ low level overdrive cycle
NLP‧‧‧normal low level quasi-period
D‧‧‧Display drive cycle
TF‧‧‧ touch touch drive cycle
TH‧‧‧ Non-contact touch drive cycle
Ld, Lf, Lh‧‧‧ length
DL‧‧‧ data line
GL‧‧‧ gate line
Cp1, Cp2‧‧‧ parasitic capacitance
LFDdl‧‧‧No load drive signal
LFDgl‧‧‧No load drive signal
SL‧‧‧Sensing line
MUX, MUX1, MUX2, MUX3, MUX4, MUX5, MUXi‧‧‧Multiplexer
100-1, 100-2‧‧‧ touch sensing circuit
CH1, CH2, CH3, CH4, CH5‧‧‧ channels
2500, AFE‧‧‧ analog front end
2510‧‧‧Common voltage application unit
2520‧‧‧No load drive unit
2530‧‧‧Sub-multiplexer

FIG. 1 is a schematic diagram of a touch sensor in which a touch sensor is embedded in a display panel according to an embodiment of the invention. Figure 2 is a block diagram of a display device in accordance with an embodiment of the present invention. Figure 3 is a schematic diagram of the equivalent circuit of the liquid crystal cell. FIG. 4 is a schematic diagram of a waveform of a vertical sync signal, showing a time division driving method of the display panel and the touch sensor. FIG. 5 is a schematic view of the touch sensing device of the present invention. Fig. 6 is a view showing the selection circuit of Fig. 5 in detail. Fig. 7 is a circuit diagram showing the detailed structure of the first selection circuit of Fig. 6. FIG. 8 is a waveform diagram of driving the touch sensing device in a finger mode according to the present invention. 9A to 9D are schematic diagrams of finger mode driving of the touch sensing device of the present invention. FIG. 10 is a waveform diagram of driving the touch sensing device in a floating mode according to the present invention. 11A and 11B are schematic diagrams showing the suspension mode driving of the touch sensing device of the present invention. FIG. 12 is a waveform diagram of a driving signal for sensing a display panel in a touch sensing device according to the present invention. Figure 13 is a schematic diagram of the display driving mode and the touch driving mode of the present invention. 14 and 15 are schematic views respectively showing driving signals used in the touch driving mode of the present invention. 16A to 16D are representative diagrams of driving signals in each contact touch driving mode and non-contact touch driving mode of the present invention. FIG. 17 is a schematic diagram showing driving timings when the frame period is performed as the display driving period, the touch driving period, and the non-contact touch driving period during the driving of the display device of the present invention. FIG. 18 is a diagram showing the contact touch driving period and the non-contact touch driving when the frame period is performed as the display driving period, the touch driving period and the non-contact touch driving period during the driving of the display device of the present invention. Schematic diagram of the variable length characteristics of the cycle. FIG. 19 is a diagram showing one of a contact touch drive period and a non-contact touch drive period when the frame period is divided into a display drive period and a touch drive period and a touch drive period during driving of the display device of the present invention. Schematic diagram of the drive timing. Figure 20 is a diagram showing a parasitic capacitor generated during touch driving of the display device of the present invention and a no-load driving scheme for improving touch sensing errors caused by parasitic capacitors. 21 and 22 are schematic diagrams of the touch sensing device included in the data driving circuit of the touch sensing circuit of the present invention. FIG. 23 is a schematic diagram of a touch sensing device in which two or more touch sensing circuits of the present invention are included in a data driving circuit. Figure 24 is a schematic diagram of the multiplexer timing associated with the touch sensing device of the present invention. Figure 25 is a schematic diagram showing the operation of the multiplexer associated with the touch sensing device of the present invention.

100‧‧‧Touch sensing circuit

102‧‧‧Selection circuit

104‧‧‧Sense signal detection unit

111a, 111b, 111c, 111d, 112a, 112b, 112c, 112d, 113a, 113b, 113c, 113d, 114a, 114b, 114c, 114d, 115a, 115b, 115c, 115d, 116a, 116b, 116c, 116d‧‧ Sensing area

121a, 121b, 121c, 121d, 122a, 122b, 122c, 122d, 123a, 123b, 123c, 123d, 124a, 124b, 124c, 124d, 125a, 125b, 125c, 125d, 126a, 126b, 126c, 126d‧‧ Sensing line

131a, 131b, 131c, 131d, 132a, 132b, 132c, 132d‧‧‧ output lines

170a, 180a, 190a, 170b, 180b, 190b‧‧‧ Sensing area blocks

Claims (50)

A touch sensing device includes: a display panel comprising a plurality of touch sensors; and a sensing signal detecting unit for supplying a driving signal for touch recognition to the touch sensing And detecting a sensing signal through the touch sensors; and a selection circuit for electrically connecting the touch sensors to the sensing signal detecting unit during the touch driving, wherein When the control driver is a non-contact touch driver, the driving signal supplied to the touch sensors is used as a reference when one of the touch drivers is driven when the touch driver is a touch driver. The waveform is overdriven as much as an overdrive voltage during a predetermined overdrive period compared to the reference waveform. The touch sensing device of claim 1, wherein during the non-contact touch driving, a pulse-dependent overdrive period of the driving signal supplied to the touch sensors corresponds to a whole width of a pulse. Or one part of the entire width. The touch sensing device of claim 2, wherein in the case of the non-contact touch driving, the driving signal supplied to the touch sensors has one of a low level period and a high level of repetition a quasi-period, wherein the low level period has a reference voltage, and the high level period has a voltage higher than the reference voltage, the high level period including the overdrive period and a normal high level period, the normal high level period having a driving voltage higher than the reference voltage, and the overdrive period has an overdrive driving voltage that is higher than the driving voltage by an overdrive voltage. The touch sensing device of claim 2, wherein in the case of the non-contact touch driving, the driving signal supplied to the touch sensors has a repeated low level period and a repeated high level a quasi-period having a reference voltage, the high level period having a voltage higher than the reference voltage, the high level period including the overdrive period and one during a first driving period of the touch driving period a normal high level period, the high level period period including the normal high level period during one of the second driving period of the touch driving period, the normal high level period having a driving voltage higher than the reference voltage, and the over driving period The overdrive driving voltage is one of an overdrive voltage higher than the driving voltage. The touch sensing device of claim 2, wherein in the case of the non-contact touch driving, the driving signal supplied to the touch sensors has a repeated low level period and a repeated high level a quasi-period comprising a high level overdrive period and a normal high level period, the low level period including a low level overdrive period and a normal low level period, the normal high level period having a higher than a reference voltage a high level drive voltage, and the high level overdrive period has a high level overdrive drive voltage that is higher than the high level drive voltage by an overdrive voltage, the normal low level period having a lower level than the reference voltage The quasi-drive voltage, and the low level overdrive period, has a low level overdrive drive voltage that is lower than the low level drive voltage by the overdrive voltage. The touch sensing device of claim 2, wherein in the case of the non-contact touch driving, the driving signal supplied to the touch sensors has a repeated low level period and a repeated high level The high level period includes the high level overdrive period and a normal high level period, and the low level period includes the low level overdrive period and a normal low period during a first driving period of a touch driving period a quasi-period, during the second driving period of the touch driving period, the high level period includes the normal high level period, and the low level period includes the normal low level period, the normal high level period having a reference voltage a high one-level driving voltage, and the high-level over-driving period has a high-level overdrive driving voltage higher than the high-level driving voltage, the normal low-level driving period having a lower than the reference voltage a low level drive voltage, and the low level overdrive period has a low level overdrive that is lower than the low level drive voltage by the overdrive voltage Dynamic voltage. The touch sensing device of claim 1, wherein the selection circuit is configured to electrically connect different numbers of touch sensors to the sensing in the case of the contact touch driving and the non-contact touch driving. Signal detection unit. The touch sensing device of claim 7, wherein the selection circuit is configured to sequentially connect the touch sensors to the sensing signal detecting unit in a contact with the touch driving. The touch sensing device of claim 7, wherein the selection circuit is configured to electrically connect two or more touch sensing devices of the touch sensors simultaneously in the case of a non-contact touch driving device. To the sensing signal detecting unit. The touch sensing device of claim 7, wherein the sensing signal detecting unit comprises two or more detecting units, and the selecting circuit comprises and is connected to the two or more detecting units. Two or more multiplexers. The touch sensing device of claim 10, wherein each of the two or more multiplexers comprises a plurality of switch groups, and each of the switch groups comprises a plurality of switches, the switches being electrically connected The touch sensors. The touch sensing device of claim 11, wherein the switches are configured to connect the plurality of output lines connected to the sensing signal detecting unit to the plurality of sensing lines connected to the touch sensors. . The touch sensing device of claim 12, wherein each of the switches is configured to selectively connect a corresponding output line and a corresponding sensing line in response to a selection signal. The touch sensing device of claim 11, wherein in the case of contacting the touch driving, the sensing signal is sequentially turned on as all the switches included in the two or more multiplexers are successively turned on one after another. The detecting unit is configured to supply the driving signal to a connected touch sensor at a predetermined timing. The touch sensing device of claim 11, wherein in the case of the non-contact touch driving, each two or more of the switches included in the two or more multiplexers are opened together The sensing signal detecting unit is configured to supply the driving signal to all of the two or more touch sensors connected together at a predetermined timing. The touch sensing device of claim 1, wherein the driving signal is supplied to the touch sensors, and a no-load driving signal having the same phase as the driving signal is supplied to the display panel. At least one data line. The touch sensing device of claim 16, wherein the driving signal is supplied to the touch sensors, and a no-load driving signal having the same phase as the driving signal is supplied to the display panel. At least one gate line. The touch sensing device of claim 17, wherein the unloaded driving signal has a signal strength and a signal shape of the driving signal for each of the non-contact touch driving and the touch driving Corresponding to a signal strength and a signal shape. The touch sensing device of claim 1, wherein the touch sensors are supplied with a display driving voltage during a display driving period, and a touch driving signal is supplied during a touch driving period, and A non-contact touch drive signal is supplied during a non-contact touch drive cycle. The touch sensing device of claim 19, wherein one frame period is divided into the display driving period, the touch driving period, and the non-contact touch driving period. The touch sensing device of claim 20, wherein each of the contact touch driving period and the non-contact touch driving period has a variable length of time. The touch sensing device of claim 19, wherein a frame period is divided into the display driving period and the touch driving period or is divided into the display driving period and the non-contact touch driving period. After the touch driving period in the first frame period, when it is determined that there is contact touch, a second frame period is divided into the display driving period and the contact touch driving period, and when it is determined that there is no contact During the control, the second frame period is divided into the display driving period and the non-contact touch driving period. The touch sensing device of claim 7, wherein the selection circuit is configured to connect a touch sensor to the sensing signal detecting unit at a time point when the touch driving is contacted. In the case of contacting the touch driving, two or more touch sensors are connected to the sensing signal detecting unit at one time point, and in the case of the non-contact touch driving, according to an event. The number of touch sensors connected to the sensing signal detecting unit is changed. A touch sensing device includes: a display panel comprising a plurality of touch sensors; and a sensing signal detecting unit for supplying a driving signal for touch recognition to the touch sensing And detecting a touch signal through the touch sensors; and a selection circuit for electrically connecting the touch sensors to the sensing signal detecting unit during the touch driving, wherein The touch drive is a contact touch drive and the touch drive is a non-contact touch drive. The selection circuit is configured to electrically connect different numbers of touch sensors to the sensing signal detecting unit. A touch sensing circuit includes: a sensing signal detecting unit for sequentially outputting a driving signal to be applied to the plurality of touch sensors and detecting a sensing signal through the touch sensors And a selection circuit for electrically connecting the plurality of touch sensors to the sensing signal detecting unit during the touch driving, wherein the driving signal is output when the touch driving is a non-contact touch driving, A driving signal outputted when the touch driving is a touch driving is used as a reference waveform, and is driven as much as one of the overdriving voltages during a predetermined overdrive period. The touch sensing circuit of claim 25, wherein during the non-contact touch driving, the overdrive period associated with a pulse of the driving signal supplied to the touch sensors corresponds to a whole pulse Width or one part of the entire width. A touch sensing circuit includes: a sensing signal detecting unit for sequentially outputting a driving signal to be applied to the plurality of touch sensors and detecting a sensing signal through the touch sensors And a selection circuit for electrically contacting a different number of touch sensors to the sensing signal detecting unit in the case of contacting the touch driving and the non-contact touch driving. The touch sensing circuit of claim 27, wherein the sensing signal detecting unit outputs the driving signal to be applied to a touch sensor at a predetermined timing in the case of contacting the touch driving. And in the case of the non-contact touch driving, the driving signal is output at a predetermined timing to be applied to the two or more touch sensors. The touch sensing circuit of claim 27, wherein in the case of the non-contact touch driving, the selecting circuit is configured to sequentially connect the touch sensors to the sensing signal detecting unit one after another. . The touch sensing circuit of claim 27, wherein in the case of a non-contact touch driving, the selecting circuit is configured to sequentially connect each two or more of the touch sensors to the sensing Signal detection unit. The touch sensing circuit of claim 27, wherein the selection circuit is implemented as at least one multiplexer for electrically connecting different numbers of touches in the case of contact touch driving and non-contact touch driving The sensor is connected to the sensing signal detecting unit. The touch sensing circuit of claim 27, wherein the selection circuit comprises a plurality of switches for switching the connection between the touch sensors and the sensing signal detecting unit in response to a selection signal. The touch sensing circuit of claim 32, wherein the switches are successively turned on one after another in contact with the touch driving, and the sensing signal detecting unit is configured to output the driving signal to a predetermined timing to A touch sensor electrically connected through an open switch. The touch sensing circuit of claim 32, wherein in the case of a non-contact touch driving, each two or more of the switches are sequentially turned on, and the sensing signal detecting unit is used for a predetermined The driving signal is outputted to two or more touch sensors electrically connected through two or more open switches. A touch sensing circuit is electrically connected to a plurality of touch sensors arranged on a display panel for supplying a driving signal to the touch sensors during a touch driving mode, wherein the touch When the driving mode is a non-contact touch driving mode, the driving signal is overdriven as much as one of the overdriving voltages during a predetermined overdrive period. A touch sensing circuit is electrically connected to a plurality of touch sensors arranged on a display panel for sequentially supplying a driving signal to the touch sensors during a touch driving mode for contacting In the case of a touch driving, a driving signal is supplied to a touch sensor at a predetermined timing, and a driving signal is supplied to two or more touches at a predetermined timing in the case of a non-contact touch driving. Sensor. The touch sensing circuit of claim 36, wherein the two or more touch sensors are adjacent touch sensors. The touch sensing circuit of claim 37, wherein the two or more touch sensors are touch sensors that are adjacent in a direction of a sensing line. The touch sensing circuit of claim 37, wherein the two or more touch sensors are touch sensors that are adjacent in a direction different from a direction of the sensing line. A touch sensing circuit is electrically connected to a plurality of touch sensors arranged on a display panel. In the case of contacting the touch driving, a driving signal is sequentially supplied to the touch sensing during the touch driving. The device is configured to detect whether a touch occurs to detect whether a touch occurs in each sensing area corresponding to a touch sensor, and in the case of a non-contact touch driving, to detect Whether there is a touch in each block corresponding to two or more touch sensors. A data driving circuit electrically connecting a plurality of data lines arranged on a display panel, electrically connecting a plurality of touch sensors arranged on the display panel, for outputting a data voltage to the data during a display driving mode a line for sequentially supplying a driving signal to the touch sensors during a touch driving mode for supplying the touch sense when the touch driving mode is a touch driving mode One of the detector drives the signal as a reference waveform, and when the touch driving mode is a non-contact touch driving mode, a driving signal is supplied, and the driving signal is overdriven and predetermined compared with the reference waveform. There is as much an overdrive voltage during the drive cycle. A data driving circuit electrically connecting a plurality of data lines arranged on a display panel, electrically connecting a plurality of touch sensors arranged on the display panel, for outputting a data voltage to the data during a display driving mode a line for sequentially supplying a driving signal to the touch sensors during a touch driving mode for supplying a driving signal to a touch sensing at a predetermined timing while contacting the touch driving mode And supplying a driving signal to the two or more touch sensors at a predetermined timing in the case of the non-contact touch driving. The data driving circuit of claim 42, wherein the data driving circuit is configured to supply a no-load driving signal having the same phase as the driving signal to at least one data line arranged on the display panel. The data driving circuit of claim 42 further includes one or more multiplexers for performing a switching operation, so that during the touch driving mode, a driving signal can be applied to the touch sensing One or more touch sensors in the device. The data driving circuit of claim 42, wherein the two or more touch sensors are adjacent touch sensors. The data driving circuit of claim 45, wherein the two or more touch sensors are touch sensors that are adjacent in a direction of a sensing line. The data driving circuit of claim 45, wherein the two or more touch sensors are touch sensors that are adjacent in a direction different from a direction of the sensing line. A data driving circuit electrically connecting a plurality of data lines arranged on a display panel, electrically connecting a plurality of touch sensors arranged on the display panel, for outputting a data voltage to the data during a display driving mode a line for detecting whether a touch occurs by sequentially supplying a driving signal to the touch sensors during the touch driving to detect a touch sensing when the touch driving is contacted Whether there is a touch in each sensing area corresponding to the device, and in the case of the non-contact touch driving, detecting whether there is a touch on each block corresponding to the two or more touch sensors . A driving method for a display device, comprising: a display panel on which a plurality of data lines and a plurality of gate lines are arranged, a data driving circuit for driving the data lines, and driving the gates a gate driving circuit of the line, the method comprising: outputting a data voltage to the data lines during a display driving mode; and supplying a driving signal to the display panel embedded in the display panel during a touch driving mode The touch sensor is supplied to the touch when the touch drive mode is a contactless touch drive mode when the touch drive mode is a contactless touch drive mode. A drive signal of the control sensor is used as a reference waveform, and during a predetermined overdrive period, a drive signal is overdriven as much as an overdrive voltage is overdriven compared to the reference waveform. A driving method for a display device, comprising: a display panel on which a plurality of data lines and a plurality of gate lines are arranged, a data driving circuit for driving the data lines, and driving the gates a gate driving circuit of the line, the method comprising: outputting a data voltage to the data lines during a display driving mode; and sequentially supplying a driving signal to the display panel during a touch driving mode The touch sensor is configured to supply a driving signal to a touch sensor at a predetermined timing when the driving signal is supplied, and to provide a driving signal to a touch sensor and a non-contact touch driving. Timing supplies a drive signal to two or more touch sensors.