KR102466286B1 - Touch Device And Method Of Driving The Same - Google Patents

Abstract

According to the present invention, a timing controller for generating a touch synchronization signal, image data, data control signal and a gate control signal using a first source voltage for image display, and the first source voltage and a second source voltage for touch sensing a transformer generating first and second microcomputer voltages; receiving the first and second microcomputer voltages; receiving the second source voltage as a third microcomputer voltage; and generating a selection signal according to the touch synchronization signal a microcomputer, a touch power supply generating first and second touch driving voltages according to the selection signal; a data driving unit generating a data voltage using the image data and the data control signal; and the gate control signal. A touch display comprising: a gate driver generating a gate voltage using the data voltage; and a touch display panel displaying an image using the data voltage and the gate voltage, and sensing a touch using the first and second touch driving voltage provide the device.

Description

Touch Device And Method Of Driving The Same

The present invention relates to a touch display device, and more particularly, to a touch display device in which power consumption is reduced by selectively driving a transformer during a sleep mode, and a driving method thereof.

In line with the information age, the display field has also developed rapidly, and in response to this, a liquid crystal display device (LCD) as a flat panel display device (FPD) with the advantages of thinness, light weight, 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 a touch screen) in which a touch panel is attached to such a display panel has been in the spotlight.

The touch display device is used as an output means for displaying an image, and is used as an input means for receiving a user's command by touching a specific part of the displayed image. It can be divided into a decompression method, an electrostatic method, an infrared method, an ultrasonic method, and the like.

That is, when the user touches the touch panel while viewing the image displayed on the display panel, the touch panel may detect the location information of the corresponding part and compare the detected location information with the location information of the image to recognize the user's command.

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, recently, the operation of the touch display device is divided into an active mode that displays an image and senses a touch and a sleep mode that does not display an image and performs only touch sensing communication. A driving method for quickly starting image display and touch sensing when switching to .

1 is a diagram illustrating a driving unit of a conventional touch display device.

As shown in FIG. 1 , the driving unit of the conventional touch display device includes a timing control unit 20 , a microcontroller unit (MCU) unit 30 , and a transforming unit 32 , and the transforming unit 32 includes: It includes first and second pressure-reducing parts 34a and 34b.

Specifically, a first source voltage VS1 from an external system (not shown) is supplied to the timing controller 20 as a driving voltage, and the timing controller 20 is activated by the first source voltage VS1 to obtain a touch synchronization signal. (TSY) is generated, and the generated touch synchronization signal TSY is transmitted to the microcomputer 30 .

Then, the second source voltage VS2 from the external system is supplied to the first and second step-down units 34a and 34b of the transformer 32 as first and second enable voltages EN1 and EN2, respectively, The first step-down unit 34a of the transformer 32 is activated by the first enable voltage EN1 to generate a first microcomputer voltage VM1, and the second step-down unit 34b has a second enable voltage. It is activated by EN2 to generate a second microcomputer voltage VM2 , and the generated first and second microcomputer voltages VM1 and VM2 are transmitted to the microcomputer unit 30 .

In addition, the first and second microcontroller voltages VM1 and VM2 and the third microcontroller voltage VM3 of the second source voltage VS2 are supplied to the microcomputer unit 30 , and the microcomputer unit 30 includes the first to second microcontroller voltages VM3 . It is activated by the 3 microcomputer voltages VM1 to VM3 to generate a selection signal SEL, and the generated selection signal SEL is transmitted to a touch power supply unit (not shown).

Here, the microcomputer 30 includes a first communication unit (not shown) for signal transmission/reception means with the timing control unit 20 such as an inter-integrated circuit (IC) and an external system such as a universal serial bus (USB). and a second communication unit (not shown) for signal transmitting and receiving means, and the first and second microcomputer voltages VM1 and VM2 are input/output terminal (I/O) driving voltage and digital core of the first communication unit, respectively. It is used as a driving voltage, and the third microcomputer voltage VM3 is used as a driving voltage of the second communication unit.

Such a conventional touch display device operates in an active mode or a sleep mode, which will be described with reference to a table.

Table 1 is a table showing the operation state of the conventional touch display device, and will be described with reference to FIG. 1 .

[Table 1]

As shown in Table 1, during the active mode, the first and second source voltages VS1 and VS2 are supplied (ON) (for example, about 3.3V, respectively) to the driving unit of the touch display device, and the timing control unit 20 and The microcomputer 30 is activated, and as a result, image display and touch sensing are performed.

To this end, the first and second enable voltages EN1 and EN2, which are the second source voltages VS2, respectively, become HIGH (for example, about 3.3V, respectively) to the first and second enable voltages of the transformer 32 , respectively. The second step-down units 34a and 34b are activated, and the first and second microcomputer voltages VM1 and VM2 output from the first and second step-down units 34a and 34b of the transformer 32 (eg, About 1.8V and about 1.2V, respectively) and a third microcontroller voltage VM3 (for example, about 3.3V) as the second source voltage VS2 are supplied (ON) to the microcomputer 30 .

Then, during the sleep mode, the first source voltage VS1 is supplied to the driving unit of the touch display device is stopped (OFF) (for example, about 0V), the timing controller 20 is deactivated, and the second source voltage VS2 is The microcomputer 30 is activated by being supplied (ON) (for example, about 3.3V) to the driving unit of the touch display device, and as a result, image display is stopped, and communication for touch sensing is performed.

To this end, the first and second enable voltages EN1 and EN2, which are the second source voltages VS2, respectively, become HIGH (for example, about 3.3V, respectively) to the first and second enable voltages of the transformer 32 , respectively. The second step-down units 34a and 34b are activated, and the first and second microcomputer voltages VM1 and VM2 output from the first and second step-down units 34a and 34b of the transformer 32 (eg, About 1.8V and about 1.2V, respectively) and a third microcontroller voltage VM3 (for example, about 3.3V) as the second source voltage VS2 are supplied (ON) to the microcomputer 30 .

As such, in the conventional touch display device, the timing controller 20 is activated during the active mode to display an image, and the microcomputer 30 is activated to perform touch sensing, while the timing controller 20 is activated during the sleep mode. Since it is deactivated, image display is stopped, and the microcomputer 30 is activated to perform touch sensing communication.

Here, during the sleep mode, the second communication unit of the microcomputer unit 30 is driven by the third microcomputer voltage VM3 to transmit and receive a touch sensing signal between the external system and the microcomputer unit 30. At the same time, the first and The first communication unit of the microcomputer 30 is driven by the second microcomputer voltages VM1 and VM2 so that an image display signal is transmitted/received between the timing controller 20 and the microcomputer 30 unnecessarily.

That is, during the sleep mode in which image display is stopped and touch sensing communication is performed, the second communication unit of the microcomputer 30 for touch sensing by the third microcomputer voltage VM3 which is the second source voltage VS2. However, there is a problem in that the first communication unit of the microcomputer 30 for displaying an image is driven by the first and second microcomputer voltages VM1 and VM2 output from the transformer 32 , thereby increasing power consumption.

For example, in the sleep mode, the image display is stopped and only the touch sensing communication is performed, so power consumption should be low. have

The present invention has been proposed to solve this problem, and it provides a touch display device and a method of driving the same in which power consumption is reduced by selectively driving a transformer during a sleep mode to stop driving an image display block of a microcomputer unit aim to

Another object of the present invention is to provide a touch display device and a method of driving the same in which power consumption is reduced and operation stability of the driving unit is improved by selectively driving the transformer according to the first and second source voltages. .

In order to solve the above problems, the present invention provides a timing controller for generating a touch synchronization signal, image data, data control signal and a gate control signal using a first source voltage for displaying an image, and the first source voltage and the touch a transformer generating first and second microcomputer voltages according to a second source voltage for sensing; receiving the first and second microcomputer voltages; receiving the second source voltage as a third microcomputer voltage; A microcomputer that generates a selection signal according to a synchronization signal, a touch power supply that generates first and second touch driving voltages according to the selection signal, and data that generates a data voltage using the image data and the data control signal a driving unit, a gate driving unit generating a gate voltage using the gate control signal, displaying an image using the data voltage and the gate voltage, and sensing a touch using the first and second touch driving voltages A touch display device including a touch display panel is provided.

The transformer includes a first and gate receiving the first and second source voltages and outputting a first enable voltage, and receiving the first and second source voltages and outputting a second enable voltage. a second AND gate; a first step-down unit generating the first microcomputer voltage according to the first enable voltage; and a second step-down unit generating the second microcomputer voltage according to the second enable voltage. can

In addition, the first and second step-down units may use the second source voltage as driving power, respectively.

And, during the active mode in which image display and touch sensing are performed, the first and second source voltages are respectively supplied to the timing controller and the microcomputer, and the first and second enable voltages are HIGH, respectively. and the first to third microcontroller voltages are respectively supplied to the microcomputer unit, and during a sleep mode in which image display is stopped and touch sensing is performed, the first source voltage is stopped to be supplied to the timing controller, and the second A source voltage is supplied to the microcomputer, the first and second enable voltages become low, respectively, the first and second microcontroller voltages are respectively stopped from being supplied to the microcomputer, and the third microcomputer voltage is It may be supplied to the microcomputer.

In addition, the microcomputer may include a first communication unit for communication with the timing control unit, and a second communication unit for communication with an external system.

In addition, the first and second microcomputer voltages may be used as driving voltages of the first communication unit, respectively, and the third microcomputer voltage may be used as driving voltages of the second communication unit.

On the other hand, the present invention comprises the steps of: a timing control unit generating a touch synchronization signal, image data, data control signal, and a gate control signal by using a first source voltage for displaying an image; generating first and second microcomputer voltages according to a second source voltage; and, by a microcomputer, receiving the first and second microcomputer voltages, receiving the second source voltage as a third microcomputer voltage, and performing the touch operation. generating a selection signal using a synchronization signal; generating first and second touch driving voltages by a touch power supply unit according to the selection signal; and a data driving unit using the image data and the data control signal to obtain data generating a voltage; generating a gate voltage by a gate driver using the gate control signal; and a touch display panel displaying an image using the data voltage and the gate voltage, and Provided is a method of driving a touch display device comprising the step of sensing a touch using a two-touch driving voltage.

The generating of the first and second microcontroller voltages includes: outputting a first enable voltage using the first and second source voltages by a first and gate of the transformer; 2nd gate outputting a second enable voltage using the first and second source voltages, and generating the first microcontroller voltage by a first step-down unit of the transformer according to the first enable voltage. and generating, by a second step-down unit of the transformer, the second microcontroller voltage according to the second enable voltage.

In addition, during the active mode in which image display and touch sensing are performed, the first and second source voltages are respectively supplied to the timing controller and the microcomputer, and the first and second enable voltages are respectively HIGH. and the first to third microcontroller voltages are respectively supplied to the microcomputer unit, and during a sleep mode in which image display is stopped and touch sensing is performed, the first source voltage is stopped to be supplied to the timing controller, and the second A source voltage is supplied to the microcomputer, the first and second enable voltages become low, respectively, the first and second microcontroller voltages are respectively stopped from being supplied to the microcomputer, and the third microcomputer voltage is It may be supplied to the microcomputer.

The present invention has the effect of reducing power consumption by selectively driving the transformer during the sleep mode to stop the operation of the image display block of the microcomputer.

Further, according to the present invention, by selectively driving the transformer according to the first and second source voltages, power consumption is reduced and the operation stability of the driving unit is improved.

1 is a view showing a driving unit of a conventional touch display device.
2 is a view showing a touch display device according to an embodiment of the present invention.
3 is a flowchart illustrating a method of driving a 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.

2 is a diagram illustrating a touch display device according to an embodiment of the present invention.

As shown in FIG. 2 , the touch display device 110 according to the embodiment of the present invention includes a timing control unit 120 , a microcomputer 130 , a transformer 132 , a power management unit 140 , and a touch power supply unit ( 150), a data driver 160, a gate driver 170 and a touch display panel 180, including a timing controller 120, a microcomputer 130, a transformer 132, a power management unit 140, and a touch panel. The power supply unit 150, the data driver 160, and the gate driver 170 constitute a driving unit, and the touch display device 110 is an organic light emitting diode display device (OLED display device) or a liquid crystal display device ( liquid crystal display device (LCD device).

The touch display device 110 according to the embodiment of the present invention includes an active mode for activating the timing controller 120 to display an image, and activating the touch power supply 150 to perform touch sensing, and a timing controller It can be driven in a sleep mode in which touch sensing communication is performed by activating the touch power supply unit 150 without performing image display by deactivating 120 , the first source voltage VS1 for image display and the touch By selectively activating or deactivating the transformer 132 using the sensing second source voltage VS2, power consumption can be reduced.

The timing controller 120 uses the first source voltage VS1 transmitted from an external system (not shown) such as a graphic card or TV system as a driving voltage, and includes an image signal IS and data transmitted from the external system. A touch synchronization signal (TSY), image data (RGB), data control signal ( DCS) and the gate control signal GCS, the generated touch synchronization signal TSY is transmitted to the microcontroller unit (MCU) unit 130, and the generated image data RGB and data control signal DCS ) is transferred to the data driver 160 , and the generated gate control signal GCS is transferred to the gate driver 170 .

For example, a first source voltage VS1 from an external system is supplied to the timing controller 120 as a driving voltage, and the timing controller 120 is activated by the first source voltage VS1 to generate image data RGB, A data control signal DCS, a gate control signal GCS, and a touch synchronization signal TSY may be generated.

The transformer 132 generates first and second microcomputer voltages VM1 and VM2 by using the first and second source voltages VS1 and VS2. For this purpose, first and second AND gates ) (136a, 136b) and the first and second step-down parts (134a, 134b).

For example, the first and second source voltages VS1 and VS2 from an external system are supplied as input voltages to the first and second and gates 136a and 136b, respectively, and the first and second and gates 136a, 136b may output first and second enable voltages EN1 and EN2 according to the first and second source voltages VS1 and VS2, The first and second enable voltages EN1 and EN2 are supplied to the first and second step-down units 134a and 134b, respectively, and the first step-down unit 134a is activated by the first enable voltage EN1. The first microcomputer voltage VM1 may be generated, and the second step-down unit 134b may be activated by the second enable voltage EN2 to generate the second microcomputer voltage VM2.

The microcomputer 130 generates a selection signal SEL using the touch synchronization signal TSY transmitted from the timing controller 120 , and transmits the generated selection signal SEL to the touch power supply unit 150 . , transmits and receives signals to and from the timing controller 120 using the first and second microcomputer voltages VM1 and VM2 transmitted from the transformer 132, and uses the third microcomputer voltage VM3 transmitted from an external system. It transmits and receives signals to and from external systems.

For example, the first and second microcontroller voltages VM1 and VM2 from the first and second step-down units 134a and 134b and the third microcomputer voltage VM3 of the second source voltage VS2 from the external system It is supplied to the unit 130 , and the microcomputer 130 may be activated by the first to third microcomputer voltages VM1 to VM3 to generate the selection signal SEL.

The microprocessor 130 refers to a computer in which a microprocessor and an input/output module are made of a single chip to perform a predetermined function, and includes, for example, a central processing unit (CPU), memory, and programmable input/output. can do.

In addition, the microcomputer 130 includes a first communication unit (not shown) for a signal transmission/reception means with the timing control unit 120 such as an inter-integrated circuit (IC), and an external system such as a universal serial bus (USB). It may include a second communication unit (not shown) for the signal transmitting and receiving means, the first and second microcomputer voltages VM1 and VM2 are the input/output terminal (I/O) driving voltage and the digital core of the first communication unit, respectively. core) is used as a driving voltage, and the third microcomputer voltage VM3 may be used as a driving voltage of the second communication unit.

The power management unit 140 generates a plurality of driving voltages including the common voltage VCOM and the first and second gate low voltages VGL1 and VGL2, and transmits the generated driving voltages to the touch power supply unit 150 . transmit

For example, the first and second gate low voltages VGL1 and VGL2 sequentially turn on the first and second pull-down transistors of the shift register of the gate driver 165 , respectively. can be used to make

In addition, the power management unit 140 may be a power management integrated circuit (PMIC) that generates and outputs a plurality of power voltages.

The touch power supply unit 150 generates first and second touch driving voltages TS1 and TS2 from a plurality of driving voltages according to the selection signal SEL, and the generated first and second driving touch voltages TS1 and TS2. ) to the data driver 160 and the gate driver 170 , respectively.

For example, the touch power supply unit 150 may be a touch power integrated circuit (TPIC) that generates and outputs a plurality of modulated voltages and a plurality of touch driving voltages.

The data driver 160 generates a data voltage (data signal) using the data control signal DCS and the image data RGB transmitted from the timing controller 120 , and applies the generated data voltage to the touch display panel 180 . . ) can be approved.

The gate driver 170 generates a gate voltage using the gate control signal GCS transmitted from the timing controller 120 , and applies the generated gate voltage to the gate wiring GL of the touch display panel 180 . Meanwhile, the touch reception signal may be read from the second touch wiring TL2 of the touch display panel 180 using the second touch driving voltage TS2 transmitted from the touch power supply unit 150 .

Here, the gate driver 170 is a gate-in-panel (GIP) formed together on the substrate of the display panel 180 on which the gate line GL, the data line DL, and the pixel P are formed. ) type.

In the embodiment of the present invention, the data driver 160 and the gate driver 170 serve as a touch transmitter and a touch receiver as an example, respectively, but in another embodiment, the data driver 160 and the gate driver 170 are separate from each other. A touch transmitter and a touch receiver may be formed to be connected to the first and second touch wires TL1 and TL2.

The touch display panel 180 displays an image using a gate voltage and a data voltage, and senses a touch using a touch transmission voltage and a touch reception voltage. ) and a data line DL, a pixel P connected to the gate line GL and the data line DL, and first and second touch lines TL1 and TL2.

When the touch display device 110 is an organic light emitting diode display, the pixel P of the touch display panel 180 may include a switching thin film transistor, a driving thin film transistor, a storage capacitor, and a light emitting diode, and the touch display device 110 ) is a liquid crystal display device, the pixel P of the display panel 180 may include a thin film transistor, a storage capacitor, and a liquid crystal capacitor.

The touch display device 110 according to the embodiment of the present invention activates the transformer 132 during the active mode by using the first and second source voltages VS1 and VS2 and activates the transformer 132 during the sleep mode. By deactivating, power consumption can be reduced, which will be described with reference to the table.

Table 2 is a table showing the operating state of the touch display device according to the embodiment of the present invention, and will be described with reference to FIG. 2 .

[Table 2]

As shown in Table 2, during the active mode, the first and second source voltages VS1 and VS2 are supplied (ON) to the timing controller 120 and the microcomputer 130 of the driver of the touch display device 110, respectively. (for example, about 3.3V each), the timing controller 120 and the microcomputer 130 are activated, and as a result, image display and touch sensing are performed.

To this end, the first and second source voltages VS1 and VS2 are supplied (ON) (for example, about 3.3V, respectively) to each of the first and second and gates 136a and 136b of the transformer 132, and , the first and second enable voltages EN1 and EN2 output from the first and second and gates 136a and 136b, respectively, become HIGH (for example, about 3.3V, respectively) to the transformer ( The first and second step-down units 134a and 134b of 132 are activated, and the first and second microcomputer voltages VM1 and VM2 output from the first and second step-down units 134a and 134b (eg, About 1.8V and about 1.2V, respectively) and a third microcontroller voltage VM3 (for example, about 3.3V) as the second source voltage VS2 are supplied (ON) to the microcomputer 130 .

Then, during the sleep mode, the supply of the first source voltage VS1 to the driver of the touch display device 110 is stopped (OFF) (for example, about 0V), so that the timing controller 120 is deactivated, and the second source voltage ( VS2) is supplied (ON) (for example, about 3.3V) to the driving unit of the touch display device 110 to activate the microcomputer 130. As a result, image display is stopped, and communication for touch sensing is performed. .

To this end, the first source voltage VS1 is supplied to each of the first and second and gates 136a and 136b of the transforming unit 132 and is turned OFF (for example, about 0V), and the second source voltage ( VS2) is supplied (ON) to each of the first and second and gates 136a and 136b of the transformer 132 (for example, about 3.3 V, respectively), and the first and second and gates 136a and 136b The first and second enable voltages EN1 and EN2 output by , respectively, become low (eg, about 0V, respectively) to the first and second step-down units 134a and 134b of the transformer 132 , respectively. ) is deactivated, and the first and second microcomputer voltages VM1 and VM2 (for example, about 0V and about 0V, respectively) output from the first and second step-down units 134a and 134b are transferred to the microcomputer 130 . The supply is stopped (OFF), and the third microcomputer voltage VM3 (eg, about 3.3V), which is the second source voltage VS2 , is supplied (ON) to the microcomputer unit 30 .

As described above, in the touch display device 110 according to the embodiment of the present invention, the timing controller 120 is activated during the active mode to display an image, and the microcomputer 130 is activated to perform touch sensing, while the sleep mode is performed. During the mode, the timing controller 120 is deactivated to stop image display, and the microcomputer 130 is activated to perform touch sensing communication.

Here, during the sleep mode, the second communication unit of the microcomputer 130 is driven by the third microcomputer voltage VM3 to transmit and receive a touch sensing signal between the external system and the microcomputer 130, and at the same time, the first and By stopping the supply of the second microcomputer voltages VM1 and VM2 (OFF), the driving of the first communication unit of the microcomputer 130 is stopped, so that the transmission and reception of the image display signal between the timing control unit 120 and the microcomputer 130 is not performed. stopped, and power consumption is reduced.

That is, during the sleep mode in which image display is stopped and touch sensing communication is performed, the second communication unit of the microcomputer 30 for touch sensing by the third microcomputer voltage VM3 which is the second source voltage VS2. Although driven, the first and second output voltages of the first and second and gates 136a and 136b using the first and second source voltages VS1 and VS2 as input voltages instead of the second source voltage VS2 are applied to the first and second sources, respectively. By using the two enable voltages (EN1, EN2), the microcomputer unit 130 for image display by stopping the supply of the first and second microcomputer voltages VM1 and VM2 output from the transformer 132 (OFF). of the first communication unit is stopped to reduce power consumption.

For example, in the sleep mode, the image display is stopped, the transmission/reception of the image display signal is stopped, and only the touch sensing communication is performed, so power consumption is reduced, and the It has a low (LOW) power consumption of 12mW.

Although not shown, in the touch display device 110 according to the embodiment of the present invention, the first and second step-down units 134a and 134b of the transformer 132 respectively use the second source voltage VS2 as driving power. However, when the first source voltage VS1 is used as the first and second enable voltages EN1 and EN2 instead of the output voltages of the first and second AND gates 136a and 136b, the power-on-sequence (power-on-sequence) may be violated.

That is, according to the power-on-sequence of the touch display device 110 , the first and second source voltages VS1 and VS2 are supplied, and thereafter, the second microcomputer voltage VS2, which is the digital core driving voltage, is applied to the microcomputer unit ( 130), the first microcontroller voltage VS1, which is an input/output terminal driving voltage, must be supplied to the microcomputer 130 in order for the microcomputer 130 to operate normally. When supplied directly to the first and second step-down units 134a and 134b as the second enable voltages EN1 and EN2, the digital core driving voltage VS2 and the input/output terminal driving voltage 1 MIC voltage ( VS1) is simultaneously supplied to the microcomputer 130, so that the microcomputer 130 may malfunction.

Accordingly, in the touch display device 110 according to the embodiment of the present invention, the output voltages of the first and second end gates 136a and 136b using the first and second source voltages VS1 and VS2 as input voltages. By using as the first and second enable voltages EN1 and EN2, the second microcomputer voltage VS2, which is the digital core driving voltage, and the first microcomputer voltage VS1, which is the input/output terminal driving voltage, are sequentially generated by the microcomputer 130 ) to allow the microcomputer 130 to operate normally.

A method of driving such a touch display device 110 will be described with reference to the drawings.

3 is a flowchart for explaining a method of driving a touch display device according to an embodiment of the present invention, which will be described with reference to FIG. 2 .

3 , when power is applied to the touch display device 110 according to the embodiment of the present invention (st10), the touch display device 110 is driven in an active mode or a sleep mode (st12, st24). .

In the active mode st12 for performing image display and touch sensing, the first and second source voltages VS1 and VS2 are supplied to the first and second end gates 136a and 136b of the transformer 132, respectively ( ON) (st14), and the first and second enable voltages EN1 and EN2 output from the first and second and gates 136a and 136b become HIGH, respectively (st16).

Thereafter, the first and second step-down units 134a and 134b of the transformer 132 are activated to supply (ON) the first and second microcontroller voltages VM1 and VM2 to the microcomputer 130 , and the second The third microcomputer voltage VM3 that is the source voltage VS2 is supplied (ON) to the microcomputer 130 (st18).

Thereafter, the first communication unit of the microcomputer 130 is driven by the first and second microcomputer voltages VM1 and VM2 so that the first communication of the image display signal between the timing controller 120 and the microcomputer 130 is performed. It is activated (ON), and the second communication of the touch sensing signal between the external system and the microcomputer 130 is activated (ON) by the third microcomputer voltage VM3 (st20).

Thereafter, the touch display device 110 performs image display and touch sensing together (st22).

In the sleep mode st24 in which image display is stopped and touch sensing communication is performed, the first source voltage VS1 is applied to each of the first and second end gates 136a and 136b of the transformer 132. The supply is stopped (OFF) and the second source voltage VS2 is supplied (ON) to each of the first and second and gates 136a and 136b (st26), and the first and second and gates 136a and 136b are connected to each other (st26). The output first and second enable voltages EN1 and EN2 respectively become LOW (st28).

Thereafter, the first and second step-down units 134a and 134b of the transformer 132 are deactivated so that the first and second microcontroller voltages VM1 and VM2 are supplied to the microcomputer 130 and stop (OFF). The third microcomputer voltage VM3, which is the second source voltage VS2, is supplied (ON) to the microcomputer 130 (st30).

Thereafter, the first communication unit of the microcomputer 130 is stopped by stopping the supply of the first and second microcomputer voltages VM1 and VM2 (OFF) to display an image between the timing controller 120 and the microcomputer 130 . The first communication of the signal for touch is deactivated (OFF), and the second communication of the signal for touch sensing between the external system and the microcomputer 130 is activated (ON) by the third microcomputer voltage VM3 (st32).

Thereafter, the touch display device 110 stops performing image display and performs touch sensing communication (st34).

As described above, in the touch display device 110 according to the embodiment of the present invention, during the sleep mode in which image display is stopped and touch sensing communication is performed, instead of the second source voltage VS2, the first and second By using the output voltages of the first and second and gates 136a and 136b using the source voltages VS1 and VS2 as input voltages as the first and second enable voltages EN1 and EN2, respectively, the transformer 132 ), the first communication unit of the microcomputer 130 for image display is stopped by stopping the supply of the first and second microcomputer voltages VM1 and VM2 outputted from the ), thereby reducing power consumption.

Although the above has been described with reference to the preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

110: touch display device 120: timing control unit
130: microcomputer 132: transformer
140: power management unit 150: touch power unit
160: gate driving unit 170: data driving unit
180: touch display panel

Claims (10)

a timing controller for generating a touch synchronization signal, image data, data control signal, and a gate control signal by using the first source voltage for displaying an image;
a transformer for generating first and second microcomputer voltages according to the first source voltage and a second source voltage for touch sensing;
a microcomputer that receives the first and second microcomputer voltages, receives the second source voltage as a third microcomputer voltage, and generates a selection signal according to the touch synchronization signal;
a touch power supply generating first and second touch driving voltages according to the selection signal;
a data driver for generating a data voltage using the image data and the data control signal;
a gate driver for generating a gate voltage by using the gate control signal;
A touch display panel that displays an image using the data voltage and the gate voltage and senses a touch using the first and second touch driving voltages
including,
During the active mode in which image display and touch sensing are performed, the first to third microcomputer voltages are respectively supplied to the microcomputer unit,
During the sleep mode in which image display is stopped and communication for touch sensing is performed, the first and second microcomputer voltages are respectively stopped to be supplied to the microcomputer, and the third microcomputer voltage is supplied to the microcomputer.
The method of claim 1,
The transformer is
a first and gate receiving the first and second source voltages and outputting a first enable voltage;
a second and gate receiving the first and second source voltages and outputting a second enable voltage;
a first step-down unit for generating the first microcomputer voltage according to the first enable voltage;
A second step-down unit generating the second microcomputer voltage according to the second enable voltage.
A touch display device comprising a.
3. The method of claim 2,
The first and second step-down units respectively use the second source voltage as driving power.
3. The method of claim 2,
During the active mode, the first and second source voltages are supplied to the timing controller and the microcomputer, respectively, and the first and second enable voltages become HIGH, respectively,
During the sleep mode, the first source voltage is stopped from being supplied to the timing controller, the second source voltage is supplied to the microcomputer, and the first and second enable voltages are set to low, respectively. Device.
The method of claim 1,
The microcomputer unit,
a first communication unit for communication with the timing control unit;
A second communication unit for communication with an external system
A touch display device comprising a.
6. The method of claim 5,
The first and second microcomputer voltages are used as driving voltages of the first communication unit, respectively,
The third microcomputer voltage is used as a driving voltage of the second communication unit.
generating, by a timing controller, a touch synchronization signal, image data, a data control signal, and a gate control signal by using a first source voltage for displaying an image;
generating, by a transformer, first and second microcomputer voltages according to the first source voltage and a second source voltage for touch sensing;
receiving, by a microcomputer, the first and second microcomputer voltages, receiving the second source voltage as a third microcomputer voltage, and generating a selection signal using the touch synchronization signal;
generating, by a touch power supply unit, first and second touch driving voltages according to the selection signal;
generating, by a data driver, a data voltage using the image data and the data control signal;
generating, by a gate driver, a gate voltage using the gate control signal;
displaying, by a touch display panel, an image using the data voltage and the gate voltage, and sensing a touch using the first and second touch driving voltages;
including,
During the active mode in which image display and touch sensing are performed, the first to third microcomputer voltages are respectively supplied to the microcomputer unit,
During the sleep mode in which image display is stopped and communication for touch sensing is performed, the first and second microcomputer voltages are respectively stopped to be supplied to the microcomputer unit, and the third microcomputer voltage is supplied to the microcomputer unit. Driving of the touch display device Way.
8. The method of claim 7,
The step of generating the first and second microcomputer voltages,
outputting a first enable voltage using the first and second source voltages by the first and gate of the transformer;
outputting a second enable voltage using the first and second source voltages by the second and gate of the transformer;
generating the first microcomputer voltage according to the first enable voltage by the first step-down unit of the transformer;
generating the second microcomputer voltage according to the second enable voltage by the second step-down unit of the transformer
A method of driving a touch display device comprising a.
9. The method of claim 8,
During the active mode, the first and second source voltages are supplied to the timing controller and the microcomputer, respectively, and the first and second enable voltages become HIGH, respectively,
During the sleep mode, the first source voltage is stopped from being supplied to the timing controller, the second source voltage is supplied to the microcomputer, and the first and second enable voltages are set to low, respectively. How to operate the device.
6. The method of claim 5,
During the sleep mode, the driving of the first communication unit is stopped by stopping the supply of the first and second microcomputer voltages, and the second communication unit is driven by the supply of the third microcomputer voltage.

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