KR20200082180A - Touch Device And Method Of Driving The Same - Google Patents

Abstract

Provided is a touch display device capable of improving the characteristics of a hover state without an increase in power consumption by changing a bias current of an uplink signal according to the type of an uplink section. The touch display device comprises: a touch display panel that displays an image and senses a touch; a plurality of touch electrodes disposed on the touch display panel; a plurality of touch wirings each connected to the plurality of touch electrodes; and a touch display driving part that generates an uplink signal by using a first bias current in an uplink section that detects an active pen when the active pen is in a spaced state where the active pen is spaced apart from the touch display panel, generates the uplink signal by using a second bias current smaller than the first bias current in the uplink section that detects the active pen and the tilt of the active pen, generates the uplink signal by using a third bias current smaller than the second bias current in the uplink section that senses a passive pen, and applies the uplink signal to the plurality of touch electrodes.

Description

Touch display device and its driving method {Touch Device And Method Of Driving The Same}

The present invention relates to a touch display device, in particular, by changing the bias current according to the use of the uplink section and the state of the active pen, a touch display in which the characteristics of the hover state are improved and the power consumption in the contact state is reduced without increasing power consumption It relates to an apparatus and a driving method thereof.

In accordance with the information age, the display field has also developed rapidly, and in response, a liquid crystal display device (LCD) as a flat panel display device (FPD) having advantages of thinning, lightening, and low power consumption. ), plasma display panel device (PDP), organic light emitting diode display device (OLED), field emission display device (FED), etc. It is rapidly replacing the cathode ray tube (CRT).

Recently, a touch display device (or touch screen) having a touch panel attached to such a display panel has been spotlighted.

The touch display device may be used as an output means for displaying an image, and may be used as an input means for receiving a user's command by touching a specific portion of the displayed image, and the touch panel of the touch display device according to the location information detection method It can be divided into a decompression method, an electrostatic method, an infrared method, and an ultrasonic method.

Such a touch display device may be manufactured in a form in which a separate touch panel is attached to the display panel, or the touch panel is formed on a substrate of the display panel to be integrated.

In particular, in recent years, for the slimming of a portable terminal such as a smart phone or a tablet PC, an electrode and wiring constituting a touch panel are formed on a substrate of a display panel to integrate the in-cell type touch display device. Demand is increasing.

On the other hand, since the user's finger touch input is not relatively sophisticated, the demand for sophisticated touch input by the electronic pen is increasing, and accordingly, the touch input by a passive pen such as a finger and the electronic pen, etc. A multi-pen type touch display device capable of simultaneously detecting a touch input by the same active pen has been developed.

The multi-pen type touch display device detects the touch input of the active pen in a hover state in which the active pen is spaced apart from the touch display panel or in a contact state in which the active pen contacts the touch display panel. There is a problem that it is difficult to smoothly detect the touch input of the active pen in the hover state.

In addition, in order to improve the characteristics of the hover state, the maximum height at which the active pen can be recognized from the touch display panel must be increased, and for this, the bias current of the uplink signal transmitted from the touch display panel to the active pen is biased. current), but there is a problem that the power consumption increases.

The present invention has been proposed to solve this problem, and provides a touch display device and a driving method for improving the characteristics of the hover state without increasing power consumption by changing the bias current of the uplink signal according to the type of the uplink section. It aims to do.

Another object of the present invention is to provide a touch display device and a driving method for reducing power consumption in a contact state by changing a bias current of an uplink signal according to the state of the active pen.

To solve the above problems, the present invention, a touch display panel for displaying an image and sensing a touch; A plurality of touch electrodes disposed on the touch display panel; A plurality of touch wirings respectively connected to the plurality of touch electrodes; When the active pen is spaced apart from the touch display panel, an uplink signal is generated using a first bias current in the uplink section detecting the active pen, and the tilt of the active pen and the active pen is generated. In the uplink section detecting, the uplink signal is generated using a second bias current smaller than the first bias current, and in the uplink section detecting the passive pen, a third bias current smaller than the second bias current. It provides a touch display device including a touch display driving unit for generating the uplink signal, and applying the uplink signal to the plurality of touch electrodes.

In addition, when the active pen is in a contact state in contact with the touch display panel, the touch display driving unit detects the active pen and the tilt of the active pen and the active pen. In the uplink section and the uplink section detecting the passive pen, the uplink signal may be generated with the third bias current, and the uplink signal may be applied to the plurality of touch electrodes.

In addition, the touch display panel displays an image during the display period of the N-th frame, detects a touch during the touch period of the N-th frame, and the touch period includes first to 16LHB periods, and the first LHB. The uplink section of the section is a beacon section that transmits a beacon signal including information on the touch display panel to the active pen, and the uplink section of the second, fifth, ninth, and thirteenth LHB sections is respectively The first to fourth active pen sections transmit an active signal for detecting the active pen to the active pen, and in the third active pen section, a tilt signal for detecting the tilt of the active pen is additionally added to the active pen. And the uplink periods of the third, sixth, seventh, fourteenth, and fifteenth LHB sections, respectively, from the first to the second pens, which transmit additional signals including additional information about the touch display panel to the active pen. The fifth data section, and the uplink section of the fourth, eighth, tenth, eleventh, twelfth, and sixteenth LHB sections respectively transmit a passive signal for detecting the passive pen to the active pen. It may be a 1 to 2 passive pen section.

And, in the case of the separation, the touch display driving unit, the uplink with the first bias current in the beacon section, the first, second, fourth active pen section and the first to fifth data section A signal may be generated, the uplink signal may be generated with the second bias current in the third active pen section, and the uplink signal may be generated with the third bias current in the first to sixth passive pen sections. have.

In addition, in the case of the contact state, the touch display driving unit generates the uplink signal with the second bias current in the third active pen section, and the beacon section and the first, second and fourth actives. The uplink signal may be generated with the third bias current in the pen section, the first to fifth data sections, and the first to sixth passive pen sections.

The bias current for the uplink signal in the beacon section of the (N+1) frame may be determined according to the bias current for the uplink signal in the fourth active pen section of the Nth frame.

In addition, the first bias current is 13 μA to 17 μA, the second bias current is 8 μA to 12 μA, and the third bias current is 3 μA to 7 μA, and the first, second and third bias currents are 15 μA, 10 μA, and 5 μA, respectively. Can be

On the other hand, the present invention, when the active pen is spaced apart from the touch display panel, the touch display driving unit generates an uplink signal by using a first bias current in the uplink section detecting the active pen. Wow; Generating, by the touch display driving unit, the uplink signal using a second bias current smaller than the first bias current in the uplink section detecting the tilt of the active pen and the active pen; Generating, by the touch display driving unit, the uplink signal with a third bias current smaller than the second bias current in the uplink section detecting the passive pen; The touch display driving unit provides a method of driving a touch display device comprising applying the uplink signal to the plurality of touch electrodes.

In addition, the driving method of the touch display device, when the active pen is in contact with the touch display panel, the touch display driving unit detects the active pen, the uplink section, and the active pen and The method may further include generating the uplink signal with the third bias current in the uplink section sensing the tilt of the active pen and the uplink section sensing the passive pen.

The present invention has an effect of improving the characteristics of the hover state without increasing power consumption by changing the bias current of the uplink signal according to the type of the uplink section.

In addition, the present invention has an effect of reducing the power consumption in the contact state by changing the bias current of the uplink signal according to the state of the active pen.

1 is a view showing a multi-pen touch display device according to an embodiment of the present invention.
2A, 2B, and 2C are diagrams illustrating a no-touch state, a hover state, and a contact state of a multi-pen touch display device according to an embodiment of the present invention, respectively.
3 is a diagram illustrating one frame of a multi-pen touch display device according to an embodiment of the present invention.
4 is a diagram illustrating an uplink section of a multi-pen touch display device according to an embodiment of the present invention.

Hereinafter, a touch display device and a driving method thereof according to the present invention will be described with reference to the accompanying drawings.

1 is a diagram illustrating a multi-pen touch display device according to an exemplary embodiment of the present invention, and will be described using an in-cell type touch display device of a self-capacitance method as an example.

As shown in FIG. 1, the multi-pen type touch display device 110 according to an exemplary embodiment of the present invention includes a touch display panel 120 and a touch display driving unit 130.

The touch display panel 120 serves to display an image and sense a touch, and connects a plurality of touch electrodes TE, a plurality of touch electrodes TE, and a touch display driver 130 to detect touch. It includes a plurality of touch wiring (TL).

The plurality of touch electrodes TE may be arranged in a matrix form.

Although not illustrated, the touch display panel 120 includes a first substrate for image display, a gate wiring and a data wiring disposed on the first substrate and crossing each other to define a pixel region, and a gate wiring disposed in the pixel region. And a thin film transistor connected to the data wiring and a pixel electrode disposed in the pixel area and connected to the thin film transistor.

The touch display panel 120 may be an organic light emitting diode panel or a liquid crystal panel. The organic light emitting diode panel touch display panel 120 emits light connected to a pixel electrode. A diode and a protective layer covering the light emitting diode may be further included. The touch display panel 120, which is a liquid crystal panel, may include a second substrate spaced apart from the first substrate, a common electrode under the second substrate, and A liquid crystal layer disposed between the first and second substrates may be further included.

The touch display driving unit 130 serves to detect a touch position, applies a touch scan signal to a plurality of touch electrodes TE of the touch display panel 120, and a passive pen (PP) such as a finger. ), it is possible to detect the location of the touch input to the touch display panel 120 by analyzing changes in the capacitance of the plurality of touch electrodes TE according to the touch input.

Then, the touch display driving unit 130 transmits an uplink signal to an active pen (AP) such as an electronic pen through a plurality of touch electrodes TE of the touch display panel 120, Analyzing the downlink signal according to the touch input received from the active pen AP through the plurality of touch electrodes TE of the touch display panel 120 to determine the location of the touch input to the touch display panel 120. Can be detected.

Here, the touch display driving unit 130 generates an uplink signal using a bias current, and the amplitude of the uplink signal may be proportional to the bias current.

Although not shown, the active pen AP includes a pen tip for receiving an uplink signal or transmitting a downlink signal, a pressure unit for sensing the pressure of the pen tip, and a frequency for the received uplink signal and detecting the frequency of the received uplink signal. It may include a control unit for generating a synchronized downlink signal.

In addition, although not shown, the touch display driving unit 130 may include a timing control unit for displaying images, a data driving unit, a gate driving unit, a touch control unit for detecting a touch, and a touch driving unit, and the data driving unit and the touch driving unit are one. The source readout integrated circuit (SRIC) may be formed of a touch data driving unit, and the touch control unit may be formed of a microcontroller unit (MICOM) type microcomputer unit.

The timing control unit uses a plurality of timing signals, such as a video signal and a data enable signal, a horizontal synchronization signal, a vertical synchronization signal, and a clock, transmitted from an external system such as a graphic card or TV system, to synchronize touch signals, image data, and data. The control signal and the gate control signal may be generated, the generated touch synchronization signal may be transferred to the micom unit, the generated image data and data control signal may be transferred to the touch data driving unit, and the generated gate control signal may be transmitted to the gate driving unit.

The micom unit generates a touch scan signal using the touch synchronization signal transmitted from the timing control unit, transmits the generated touch scan signal to the touch data driving unit, analyzes the touch detection signal received from the touch data driving unit, and generates a touch scan signal. The position of the touch input can be detected.

Then, the micom unit generates an uplink signal using the touch synchronization signal transmitted from the timing control unit, transmits the generated uplink signal to the touch data driving unit, analyzes the downlink signal received from the touch data driving unit, and activates the active pen. The position of the touch input by can be detected.

The touch data driving unit may generate a data signal (data voltage) using the data control signal and image data transmitted from the timing control unit, and apply the generated data signal to the data wiring of the touch display panel 120.

Then, the touch data driving unit applies the touch scan signal transmitted from the micom unit to the touch electrode TE through the touch wiring TL, and applies the capacitance signal of the touch electrode TE to the micom through the touch wiring TL. You can pass it to wealth.

In addition, the touch data driving unit transmits the uplink signal transmitted from the micom unit to the active pen AP through the touch wiring TL and the touch electrode TE, and transmits the touch wiring TL and the touch electrode TE. Through this, a downlink signal may be received from the active pen AP.

The gate driving unit may generate a gate signal (gate voltage) using a gate control signal transmitted from the timing control unit and apply the generated gate signal to the gate wiring of the touch display panel 120.

The gate driving unit may be a gate-in-panel (GIP) type formed together on a substrate of the touch display panel 120 in which a gate wiring, a data wiring, a touch wiring TL, and a pixel region are formed.

The multi-pen type touch display device 110 has a different state according to the separation distance between the touch display panel 120 and the active pen AP, which will be described with reference to the drawings.

2A, 2B, and 2C are diagrams illustrating a no-touch state, a hover state, and a contact state of a multi-pen type touch display device according to an embodiment of the present invention, and will be described with reference to FIG. 1.

As shown in FIG. 2A, in the multi-pen type touch display device 110 according to an embodiment of the present invention, the separation distance GD between the touch display panel 120 and the active pen AP is an active pen ( When the AP) is larger than the maximum height Hmax that can be recognized, the active pen AP has a no-touch state NS.

As illustrated in FIG. 2B, in the multi-pen type touch display device 110 according to an exemplary embodiment of the present invention, the separation distance GD between the touch display panel 120 and the active pen AP is an active pen ( When the AP is less than or equal to the maximum height Hmax that can be recognized and greater than 0, the AP has a hover state HS that recognizes the active pen AP spaced apart from the touch display panel 120.

As shown in FIG. 2C, in the case where the separation distance GD between the touch display panel 120 and the active pen AP is 0 in the multi-pen type touch display device 110 according to an embodiment of the present invention, , Has a contact state CS for recognizing the active pen AP contacting the touch display panel 120.

As described above, the multi-pen type touch display device 110 according to the exemplary embodiment of the present invention is in a no-touch state (NS) and a hover state according to a separation distance (GD) between the touch display panel 120 and the active pen (AP). (HS), and has a contact state (CS), the no-touch state (NS) and the hover state (HS) may be divided into a separation state in which the touch display panel 120 and the active pen AP are spaced apart from each other.

In addition, as the maximum height Hmax at which the active pen AP can be recognized is increased, characteristics of the hover state HS may be improved.

Meanwhile, the multi-pen touch display device 110 is driven by dividing a section of one frame into a display section displaying an image and a touch section sensing a touch, which will be described with reference to the drawings.

3 is a diagram illustrating one frame of a multi-pen touch display device according to an exemplary embodiment of the present invention, and will be described with reference to FIG. 1 together.

As shown in FIG. 3, the multi-pen touch display device 110 according to an embodiment of the present invention is driven in a long horizontal blank (LHB) method. In the LHB method, one frame (1F) The section is divided into a display section (DP) displaying an image and a touch section (TP) sensing a touch, the touch section (TP) is divided into a plurality of LHB sections, and the display section (DP) is a plurality of LHB sections It can be distributed in between.

In addition, each of the plurality of LHB sections includes an uplink section for transmitting a signal from the touch display panel 120 to the active pen AP and detecting the passive pen PP and the active pen AP, and the active pen AP ) Can be divided into a downlink section for transmitting a signal to the touch display panel 120 and detecting a touch.

For example, a plurality of LHB sections may include first to 16th LHB sections (L1 to L16).

In addition, the touch display panel 120 is divided into a plurality of display blocks and a plurality of touch blocks, and a plurality of display blocks are separately driven during a plurality of display sections DP to display an image, and the first to 16LHB sections are displayed. During (L1 to L16), a plurality of touch blocks are separately driven to sense a touch.

During the display section DP, a common voltage is applied to the touch electrode TE of the touch display panel 120, and a gate voltage and a data voltage are applied to the gate wiring and the data wiring of the touch display panel 120, respectively, and touch The display panel 120 can display an image.

During the touch period TP, a touch scan signal or an uplink signal is applied to the touch electrode TE of the touch display panel 120, and a capacitance change or downlink signal is analyzed through the touch electrode TE, and touch The display panel 120 can sense a touch.

The touch scan signal and the uplink signal may be alternating current (AC)-type signals each including a plurality of pulses, or may be direct-current (DC)-type signals having a constant voltage.

The AC type signal may be composed of a plurality of pulses having a specific frequency, and each pulse may have various shapes such as a square wave, a triangular wave, a sine wave, and a trapezoidal wave.

For example, the touch position of the passive pen PP or the position of the active pen AP in all areas of the touch display panel 120 can be accurately detected by the AC type signal, and the touch display panel is applied by the DC type signal. In some regions of 120, the position and tilt of the active pen AP can be accurately detected.

The number of LHB sections constituting the touch section TP and the allocation of the plurality of LHB sections may be variously changed according to embodiments.

The multi-pen type touch display device 110 changes the bias current of the uplink signal according to the type of the uplink section and the state of the active pen, which will be described with reference to the drawings.

4 is a view showing an uplink section of a multi-pen touch display device according to an embodiment of the present invention, and will be described with reference to FIGS. 1 to 3.

As shown in FIG. 4, the touch section TP of one frame 1F of the multi-pen touch display device 110 according to an embodiment of the present invention includes a plurality of LHB sections, and a plurality of LHB sections The uplink section of may include at least one beacon section (BCP), at least one active pen section (APP), at least one passive pen section (PPP), and at least one data section (DTP).

For example, a plurality of LHB sections include the first to 16LHB sections (L1 to L16), and the uplink section of the first LHB section L1 is a touch display panel 120 such as panel ID, panel state, and panel type. ) May be a beacon section (BCP) that transmits a beacon signal including information on the active pen (AP), and the second, fifth, ninth, and thirteenth LHB sections (L2, L5, L9, L13) The uplink section of) may be the first to fourth active pen sections APP1 to APP4 transmitting the active signal for sensing the active pen AP to the active pen AP, respectively, and the ninth LHB section L9. In the uplink section of the third active pen section APP3, an active tilt signal to which the tilt signal for detecting the tilt of the active pen AP is added may be transmitted to the active pen AP.

In the embodiment of FIG. 4, it is exemplified to add a tilt signal to the third active section APP3, but in another embodiment, a tilt signal may be added to at least one of the first to fourth active sections APP1 to APP4. have.

In addition, the uplink sections of the third, sixth, seventh, fourteenth, and fifteenth LHB sections L3, L6, L7, L14, and L15 respectively receive additional signals including additional information about the touch display panel 120. It may be the first to fifth data sections (DTP1 to DTP5) transmitted to the active pen AP, and the fourth, eighth, tenth, eleventh, twelveth, sixteenth LHB sections L4, L8, L10, L11 , L12, L16 may be the first to sixth passive pen sections (PPP1 to PPP6) transmitting the passive signal for sensing the passive pen PP to the passive pen PP, respectively.

Here, the touch display driving unit 130 generates an uplink signal such as a beacon signal, an active signal, an active tilt signal, an additional signal, and a passive signal by using a bias current. The type of the uplink section and the active pen (AP) Depending on the state, an uplink signal can be generated with different bias currents.

Specifically, when the active pen AP is in a non-touch state (NS) and a hover state (HS), since it is required to improve the characteristics of the hover state (HS), a beacon section transmitting information about the touch display panel 120 ( BCP), the first, second, and fourth active pen sections (APP1, APP2, APP4) sensing the active pen (AP), and the first to fifth transmitting additional information about the touch display panel 120 In the data sections DTP1 to DTP5, an uplink signal may be generated with a first bias current Ib1 having a relatively large current value.

In addition, when the active pen AP is in a no-touch state (NS) and a hover state (HS), in the third active pen section APP3 sensing the tilt of the active pen AP and the active pen AP, the first An uplink signal may be generated with a second bias current Ib2 having an intermediate current value smaller than the bias current Ib1. (Ib1>Ib2)

In addition, when the active pen AP is in the no-touch state (NS) and the hover state (HS), in the first to sixth passive pen sections PPP1 to PPP6 detecting the passive pen PP, the second bias current ( An uplink signal may be generated with a third bias current Ib3 having a relatively small current value smaller than Ib2). (Ib2>Ib3)

For example, the first bias current Ib1 may be about 13 μA to about 17 μA, the second bias current Ib3 may be about 8 μA to about 12 μA, and the third bias current Ib1, Ib2, Ib3 is Each of about 315 μA, to about 10 μA, and about 75 μA.

That is, in the case where the active pen AP is in the no-touch state (NS) and the hover state (HS), in the first, second, and fourth active pen sections (APP1, APP2, APP4) detecting the active pen (AP) By generating the uplink signal using the first bias current (Ib1) of a relatively high current value, while improving the characteristics of the hover state of the active pen (AP), the first to the first to detect the passive pen (PP) at the same time In the six-passive section (PPP1 to PPP6), an uplink signal is generated using a third bias current Ib3 having a relatively low current value, thereby offsetting an increase in power consumption due to the use of the first bias current Ib1. Can.

For example, in the multi-pen touch display device according to the comparative example, regardless of the state of the active pen AP, the beacon section (BCP), the first to fourth active pen sections (APP1 to APP4), and the first to Uplink signals are generated using a bias current Ib of about 10 μA in both the fifth data section (DTP1 to DTP5) and the first to sixth passive pen sections (PPP1 to PPP6), and accordingly, the multi according to the comparative example. The pen-type touch display device has a maximum height (Hmax) at which an active pen (AP) of about 8 mm can be recognized and a current consumption of about 303 mA.

On the other hand, in the multi-pen type touch display device 110 according to the embodiment of the present invention, the active pen AP is detected when the active pen AP is in a non-touch state (NS) and a hover state (HS). In the 1st, 2nd, and 4th active pen sections (APP1, APP2, APP4), first to sixth to generate an uplink signal using the first bias current (Ib1) of about 15mA and detect the passive pen (PP). In the passive pen section (PPP1 to PPP6), an uplink signal is generated using a third bias current (Ib3) of about 5mA, and accordingly, the multi-pen touch display device 110 according to an embodiment of the present invention is about The 11mm active pen (AP) has a maximum height (Hmax) that can be recognized and a current consumption of about 304mA.

Therefore, the multi-pen type touch display device 110 according to an embodiment of the present invention has a maximum height Hmax of about 11 mm that is increased from a maximum height Hmax of about 8 mm in the comparative example and a current consumption of about 303 mA in the comparative example Since it has a consumption current of about 304mA, it is possible to improve the characteristics of the active pen AP without increasing power consumption when the active pen AP is in a no-touch state (NS) and a hover state (HS).

In addition, when the active pen AP is in the contact state CS, it is not required to improve the characteristics of the hover state HS, so the third active pen section that detects the tilt of the active pen AP and the active pen AP (APP3) detects a beacon section (BCP) and an active pen (AP) that generates an uplink signal with a second bias current (Ib2) of an intermediate current value and transmits information on the remaining touch display panel 120. The first, second, and fourth active pen sections (APP1, APP2, APP4), first to fifth data sections (DTP1 to DTP5) for transmitting additional information about the touch display panel 120, and passive pen In the first to sixth passive pen sections PPP1 to PPP6 sensing (PP), an uplink signal may be generated with a third bias current Ib3 having a relatively small current value.

That is, when the active pen AP is in the contact state CS, the first to sixth passive pen sections PPP1 to PPP6 for detecting the passive pen PP, as well as the first to detect the active pen AP , In the second and fourth active pen sections APP1, APP2, and APP4, the uplink signal is generated using the relatively low current value of the third bias current Ib3, thereby reducing power consumption.

For example, the multi-pen type touch display device according to the comparative example has a current consumption of about 303 mA, whereas in the multi-pen type touch display device 110 according to the embodiment of the present invention, the active pen AP contacts In the case of the state CS, the first to sixth passive pen sections PPP1 to PPP6 sensing the passive pen PP and the first, second, and fourth active pen sections sensing the active pen AP APP1 , APP2, APP4) generates an uplink signal using a third bias current (Ib3) of about 5mA, and accordingly, the multi-pen touch display device 110 according to an embodiment of the present invention consumes about 291mA. Have a current

Therefore, since the multi-pen touch display device 110 according to the embodiment of the present invention has a consumption current of about 291 mA, which is reduced by about 13 mA than the current consumption of about 303 mA in the comparative example, the active pen AP is in a contact state ( CS), power consumption can be reduced.

Meanwhile, in the multi-pen type touch display device 110 according to an embodiment of the present invention, the bias current for the uplink signal of the beacon section (BCP) of the (N+1) frame is the fourth active of the N-th frame. It may be determined according to the bias current for the uplink signal of the pen section APP4.

For example, when the active pen AP is in a no-touch state (NS) and a hover state (HS), the uplink signal of the fourth active pen section (APP4) of the Nth frame is a first bias of a relatively high current value. It is generated using the current Ib1, and accordingly, the uplink signal of the beacon section BCP of the (N+1)th frame may also be generated using the first bias current Ib1.

And, when the active pen AP is in the contact state CS, the uplink signal of the fourth active pen section APP4 of the N-th frame is generated using the third bias current Ib3 having a relatively low current value. Accordingly, the uplink signal of the beacon section (BCP) of the (N+1)th frame may also be generated using the third bias current Ib3.

Although described above with reference to preferred embodiments of the present invention, those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can understand that you can.

110: touch display device 120: touch display panel
TE: Touch electrode TL: Touch wiring
130: touch display driving unit

Claims (9)

A touch display panel displaying an image and sensing a touch;
A plurality of touch electrodes disposed on the touch display panel;
A plurality of touch wirings respectively connected to the plurality of touch electrodes;
When the active pen is spaced apart from the touch display panel, an uplink signal is generated using a first bias current in the uplink section detecting the active pen, and the tilt of the active pen and the active pen is generated. In the uplink section detecting, the uplink signal is generated using a second bias current smaller than the first bias current, and in the uplink section detecting the passive pen, a third bias current smaller than the second bias current. A touch display driving unit for generating the uplink signal and applying the uplink signal to the plurality of touch electrodes.
Touch display device comprising a.
According to claim 1,
The touch display driving unit, when the active pen is in contact with the touch display panel, the uplink section detecting the active pen and the uplink detecting the tilt of the active pen and the active pen A touch display device for generating the uplink signal with the third bias current in the interval and the uplink section detecting the passive pen, and applying the uplink signal to the plurality of touch electrodes.
According to claim 2,
The touch display panel displays an image during the display period of the N-th frame, detects a touch during the touch period of the N-th frame,
The touch section includes the first to 16LHB sections,
The uplink section of the first LHB section is a beacon section that transmits a beacon signal including information on the touch display panel to the active pen,
The uplink periods of the second, fifth, ninth, and thirteenth LHB sections are first to fourth active pen sections that respectively transmit an active signal for detecting the active pen to the active pen, and the third active In the pen section, a tilt signal for detecting the tilt of the active pen is additionally transmitted to the active pen,
The uplink periods of the third, sixth, seventh, fourteenth, and fifteenth LHB periods are first through fifth data periods, each of which transmits an additional signal including additional information about the touch display panel to the active pen. ego,
The uplink periods of the fourth, eighth, tenth, eleventh, twelfth, and sixteenth LHB sections are first to second passive pens that respectively transmit a passive signal for detecting the passive pen to the active pen. Section of the touch display device.
The method of claim 3,
In the case of the separation, the touch display driving unit transmits the uplink signal with the first bias current in the beacon section, the first, second, and fourth active pen sections and the first to fifth data sections. A touch display device that generates, generates the uplink signal with the second bias current in the third active pen section, and generates the uplink signal with the third bias current in the first to sixth passive pen sections. .
The method of claim 3,
In the case of the contact state, the touch display driving unit generates the uplink signal with the second bias current in the third active pen section, and the beacon section and the first, second and fourth active pen sections. And a third bias current in the first to fifth data sections and the first to sixth passive pen sections to generate the uplink signal.
The method of claim 3,
The bias display current for the uplink signal in the beacon section of the (N+1) frame is determined according to a bias current for the uplink signal in the fourth active pen section of the Nth frame.
The method of claim 3,
The first bias current is 13μA to 17μA, the second bias current is 8μA to 12μA, and the third bias current is 153μA, to 10μA and 75μA, respectively.
When the active pen is spaced apart from the touch display panel,
A touch display driving unit generating an uplink signal using a first bias current in an uplink section detecting the active pen;
Generating, by the touch display driving unit, the uplink signal using a second bias current smaller than the first bias current in the uplink section detecting the tilt of the active pen and the active pen;
Generating, by the touch display driving unit, the uplink signal with a third bias current smaller than the second bias current in the uplink section detecting the passive pen;
The touch display driving unit, applying the uplink signal to a plurality of touch electrodes
Method of driving a touch display device comprising a.
The method of claim 8,
When the active pen is in contact with the touch display panel,
The touch display driving unit, the uplink section for sensing the active pen, the uplink section for sensing the tilt of the active pen and the active pen, and the uplink section for detecting the passive pen, respectively And generating the uplink signal with 3 bias currents.

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