Power management circuit and display device comprising same

Abstract

Disclosed are a power management circuit and a display device comprising same. A display device according to at least one of various embodiments of the present disclosure comprises: a multiplexer that receives a display voltage and a touch voltage and generates an output voltage by selecting one of the display voltage and the touch voltage; a first power circuit that receives the display voltage and generates a driving voltage of a timing controller by reducing a signal level; a second power circuit; a second power circuit that receives the touch voltage and generates a driving voltage of a touch microcontroller unit by reducing a signal level; and a power management integrated circuit that receives and transmits the output voltage generated by the multiplexer, wherein the multiplexer can be enabled by the display voltage.

Description

Power management circuit and display device including the same

[0001] The present embodiment relates to a power management circuit and a display device including the same.

[0002] Display devices that enable touch input on the display screen - for example, touch / display devices - are being applied to various electronic devices.

[0003] Touch / display devices can implement touch and display functions in various forms, either by using the on-cell method by attaching a touch panel to a display panel, or by using the in-cell method by embedding touch electrodes in the display panel.

[0004] By using some of the common electrodes of a touch / display device as touch electrodes, touch and display can be implemented simultaneously within a single device, and the operation cycles of touch and display can be controlled by dividing one time period into a display driving period in which a video signal is transmitted to the common electrode and a touch driving period in which a touch driving signal is transmitted to the touch electrode.

[0005] In order to reduce the power consumption of a display device, it is necessary to supply power differently during the display period and the touch operation period.

[0006] When a display device performs a display operation, power for touch sensing is also consumed, and when a display device performs a touch sensing operation, power for display is also consumed. Therefore, if the power supplied is not controlled regardless of the type of operation of the display device, a problem occurs in which the power consumption of the panel increases.

[0007] In addition, even when the power for display driving and the power for touch driving are supplied separately in the display device, it is necessary to reduce power consumption and reduce the size of the circuit by appropriately designing the operation and components of the power management circuit inside the display device according to the driving mode of the panel - for example, normal driving mode, sleep driving mode, deep sleep driving mode, etc.

[0008] The purpose of the present embodiment is to provide a power management circuit that selects an appropriate input power according to the driving mode of a panel in a power management circuit that receives a plurality of input powers and performs a touch / display operation, and a display device including the same.

[0009] Another object of the present embodiment is to provide a power management circuit and a display device including the same that can increase the efficiency of power management control by using various signals to enable a multiplexer.

[0010] Another purpose of the present embodiment is to provide a power management circuit and a display device including the same, which can reduce the size and number of components of required circuits by dynamically using various power circuits, voltage modulation circuits, etc. inside the display device, and reduce the manufacturing cost and the size of a printed circuit board (PCB).

[0011] The technical problems according to the present disclosure are not limited to those described in this article, but include those that can be understood through the description of the invention described below.

[0012] A display device according to at least one of various embodiments of the present disclosure comprises: a multiplexer that receives a display voltage and a touch voltage, and selects one of the display voltage and the touch voltage to generate an output voltage; a first power circuit that receives the display voltage and reduces a signal level to generate a driving voltage of a timing controller; a second power circuit that receives the touch voltage and reduces a signal level to generate a driving voltage of a touch microcontroller unit; and a power management integrated circuit that receives and transmits an output voltage generated by the multiplexer, wherein the multiplexer can be enabled by the display voltage.

[0013] According to at least one of the various embodiments of the present disclosure, the timing controller can transmit a signal for controlling a power operation of the power management integrated circuit when a driving voltage is supplied from the first power circuit.

[0014] According to at least one of the various embodiments of the present disclosure, the power management integrated circuit can transmit a signal for controlling the operation of the touch microcontroller unit when an output voltage is supplied from the multiplexer.

[0015] According to at least one of the various embodiments of the present disclosure, the power management integrated circuit can transmit a signal for controlling the operation of the touch microcontroller unit under the control of the timing controller after the output voltage is supplied.

[0016] According to at least one of the various embodiments of the present disclosure, the timing controller can transmit a signal to the power management integrated circuit to control power operation even when the first power circuit is disabled and does not receive the display voltage.

[0017] A display device according to at least one of various embodiments of the present disclosure comprises: a multiplexer that receives a display voltage and a touch voltage, and selects one of the display voltage and the touch voltage to generate an output voltage; a first power circuit that receives the display voltage and reduces a signal level to generate a driving voltage of a timing controller; a second power circuit that receives the touch voltage and reduces the signal level to generate a driving voltage of a touch microcontroller unit; and a power management integrated circuit that receives and transmits the output voltage generated by the multiplexer, wherein the multiplexer can receive an enable signal from the touch microcontroller unit.

[0018] According to at least one of the various embodiments of the present disclosure, the timing controller can transmit a signal for controlling a power operation of the power management integrated circuit when a driving voltage is supplied from the first power circuit.

[0019] According to at least one of the various embodiments of the present disclosure, the power management integrated circuit can transmit a signal for controlling the operation of the touch microcontroller unit when an output voltage is supplied from the multiplexer.

[0020] According to at least one of the various embodiments of the present disclosure, the power management integrated circuit can transmit a signal for controlling the operation of the touch microcontroller unit under the control of the timing controller after the output voltage is supplied.

[0021] According to at least one of the various embodiments of the present disclosure, the timing controller can transmit a signal to the power management integrated circuit to control power operation even when the first power circuit is disabled and does not receive the display voltage.

[0022] A display device according to at least one of various embodiments of the present disclosure comprises: a multiplexer that receives a display voltage and a touch voltage, selects one of the display voltage and the touch voltage, and generates an output voltage; a timing controller activated by the display voltage; a touch microcontrol unit activated by the touch voltage; and a power management integrated circuit that receives and transmits the output voltage generated by the multiplexer, wherein the multiplexer can receive an enable signal from the touch microcontroller unit.

[0023] According to at least one of the various embodiments of the present disclosure, the timing controller can receive the display voltage through the power management integrated circuit.

[0024] According to at least one of the various embodiments of the present disclosure, the touch microcontroller unit can transmit a signal for controlling the operation of the power management integrated circuit.

[0025] According to at least one of the various embodiments of the present disclosure, the power management integrated circuit can transmit a signal for controlling the operation of the touch microcontroller unit when an output voltage is supplied from the multiplexer.

[0026] According to at least one of the various embodiments of the present disclosure, a second power circuit may be further included that receives the touch voltage and reduces the signal level to generate a driving voltage of the touch microcontroller unit.

[0027] According to at least one of the various embodiments of the present disclosure,

[0028] First, a power management circuit that receives multiple input power sources can select an appropriate input power source according to the panel's driving mode to perform touch / display operations.

[0029] Second, the efficiency of power management control can be improved by using various signals to enable the multiplexer.

[0030] Third, by dynamically using various power circuits, voltage modulation circuits, etc. within the display device, the size and number of required circuit components can be reduced, and the manufacturing cost and size of the printed circuit board (PCB) can be reduced.

[0031] The technical effects of the embodiments are not limited to those described in this article, but include those that can be understood through the description of the invention.

[0032] Figure 1 is a configuration diagram of a display device.

[0033] Figure 2 is a configuration diagram of a display device according to another embodiment.

[0034] Figure 3 is a drawing explaining the driving mode of the panel.

[0035] Figures 4 and 5 are first exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0036] Figures 6 and 7 are second exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0037] Figures 8 and 9 are third exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0038] Figure 10 is a first example flowchart of a power management control method according to the present embodiment.

[0039] Figures 11 and 12 are fourth exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0040] Figures 13 and 14 are fifth exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0041] Figures 15 and 16 are sixth exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0042] Figure 17 is a second example flowchart of a power management control method according to the present embodiment.

[0043] Figures 18 and 19 are diagrams showing the seventh exemplary configuration of a display device for power management control according to the present embodiment.

[0044] Figures 20 and 21 are eighth exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0045] Hereinafter, an invention according to an embodiment for solving the above problem will be described in more detail with reference to the drawings.

[0046] The suffixes "module" and "part" used in the following description are given solely for the convenience of writing this specification and do not impart any particularly significant meaning or role to the components themselves. Therefore, the terms "module" and "part" may be used interchangeably.

[0047] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0048] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0049] In this application, it should be understood that terms such as “include,” “have,” or “comprising” are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0050] This specification discloses a display device according to various embodiments of the present disclosure.

[0051] The display device according to the present disclosure may be equipped with not only a display panel but also a touch screen or a touch panel.

[0052] A display device according to the present disclosure may include a power management circuit. In this case, the power management circuit may only represent a power management integrated circuit described below, or may also include a multiplexer (MUX) linked thereto.

[0053] Figure 1 is a configuration diagram of a display device.

[0054] Referring to FIG. 1, a display device (100) may include a panel (110), a data driving circuit (120), a gate driving circuit (130), a touch circuit (140), a touch / display control circuit (150), etc.

[0055] A plurality of data lines (DL: data lines) connected to a data driving circuit (120) may be formed on the panel (110), and a plurality of gate lines (GL: gate lines) connected to a gate driving circuit (130) may be formed. In addition, a plurality of pixels (P: Pixels) corresponding to intersections of a plurality of data lines (DL) and a plurality of gate lines (GL) may be defined on the panel (110).

[0056] In each of these pixels (P), a transistor may be formed in which a first electrode (e.g., a source electrode or a drain electrode) is connected to a data line (DL), a gate electrode is connected to a gate line (GL), and a second electrode (e.g., a drain electrode or a source electrode) is connected to a display electrode.

[0057] Additionally, a plurality of touch electrodes (TE) may be formed on the panel (110) while being spaced apart from each other. One pixel (P) may be positioned in the area where the touch electrode (TE) is positioned. Alternatively, a plurality of pixels (P) may be positioned in the area where the touch electrode (TE) is positioned.

[0058] The panel (110) may include a display panel (DP) and a touch screen panel (TSP). Here, the display panel (DP) and the touch screen panel (TSP) may share some components with each other. For example, a plurality of touch electrodes (TE) may be a component of the display panel (DP) (e.g., a common electrode for applying a common voltage) and at the same time, may be a component of the touch panel (TSP) (a touch electrode for detecting a touch). In addition, the panel (110) may be an in-cell type panel in which some components of the display panel (DP) and the touch screen panel (TSP) are shared with each other, but is not limited thereto.

[0059] The data driving circuit (120) receives a data control signal from the touch / display control circuit (150) and can supply a data signal to the data line (DL) to display an image on each pixel (P) of the panel (110). The data driving circuit (120) can be defined as a source driver integrated circuit (SDIC: Source Driver IC) or the like, as needed.

[0060] The gate driving circuit (130) receives a gate control signal from the touch / display control circuit (150) and sequentially supplies a scan signal to the gate line (GL) to turn on or off the transistor located in each pixel (P). The gate driving circuit (130) may be defined as a gate driver integrated circuit (GDIC: Gate Driver IC) as needed.

[0061] The touch circuit (140) can apply a touch driving signal to all or part of a plurality of touch electrodes (TE) connected to a sensing line (SL).

[0062] In order for the touch circuit (140) to apply a touch driving signal to all or part of a plurality of touch electrodes (TE), a sensing line (SL) connected to each of the plurality of touch electrodes (TE) may be required. Accordingly, a sensing line (SL) connected to each of the plurality of touch electrodes (TE) and transmitting a touch driving signal may be formed on the panel (110) in a first direction (e.g., vertical direction) or a second direction (e.g., horizontal direction).

[0063] The touch circuit (140) may include a readout integrated circuit (ROIC), a touch microcontroller unit (TMCU), etc.

[0064] The readout integrated circuit (ROIC) can transmit a touch drive signal (STX) from the panel (110) to the touch electrode (TE) through the touch drive circuit, and can receive a touch sensing signal (SRX) from the touch electrode (TE) through the touch sensing circuit.

[0065] A readout integrated circuit (ROIC) can receive a touch sensing signal (SRX) of a size corresponding to the change in capacitance in the form of current or voltage, demodulate it, generate touch data, and transmit it to a touch control circuit (TMCU).

[0066] The touch circuit (140) can determine whether there is a touch, the touch location, the touch intensity, the touch interval, etc. based on the change in electrostatic capacity of the touch electrode according to the touch or approach of the object.

[0067] Meanwhile, the display device (100) may employ a capacitive touch method that recognizes the proximity or touch of an object by detecting changes in capacitance through a touch electrode (TE). This capacitive touch method may include a mutual capacitive touch method and a self-capacitive touch method, and the present embodiment may apply any capacitive touch method.

[0068] Meanwhile, the display device (100) can time-division drive the touch electrode (TE) by distinguishing between a display time period and a touch time period. As an example, the touch circuit (140) of the display device (100) may not apply a drive signal to all or part of the touch electrode (TE) during a period in which a data signal is supplied.

[0069] Additionally, the display device (100) can drive the touch electrode (TE) without distinguishing between the display section and the touch section. As an example, the touch circuit (140) of the display device (100) can apply a driving signal to all or part of the touch electrode (TE) in the section in which the data signal is supplied.

[0070] The touch / display control circuit (150) can supply various control signals to the data driving circuit (120), the gate driving circuit (130), and the touch circuit (140). The touch / display control circuit (150) can transmit a data control signal (DCS: data control signal) that controls the data driving circuit (120) to supply a data voltage to each pixel (P) according to each timing, transmit a gate control signal (GCS: gate control signal) to the gate driving circuit (130), or transmit a sensing signal to the touch circuit (140). The touch / display control circuit (150) can be a timing controller (T-CON: Timing Controller) or can further perform other control functions including a timing controller.

[0071] Figure 2 is a configuration diagram of a display device according to another embodiment.

[0072] Referring to FIG. 2, a display device (200) according to another embodiment may include a host (210), a display circuit (220), a touch circuit (230), etc.

[0073] Since the display device (200) can be configured or functionally mixed with the display circuit (220) and the touch circuit (230), the power signal transmitted from the host (210) can also be used mixedly.

[0074] The host (210) can supply separate power signals to each of the display circuit (220) and the touch circuit (230), and the power voltage transmitted to the display circuit (220) can be defined as the display voltage (VIN), and the power voltage transmitted to the touch circuit (230) can be defined as the touch voltage (VTSP).

[0075] Each of the display circuit (220) and the touch circuit (230) generates a driving voltage for driving each circuit from the power voltage received from the host (210), and can transmit the driving voltage to circuits within the display device, such as a timing controller (T-CON) (222), a level shifter (LS) (223), a source driver integrated circuit (SDIC) (224), a touch modulation circuit (TMIC) (232), a touch microcontroller unit (TMCU) (233), and a readout circuit (ROIC) (234).

[0076] The display voltage (VIN) and touch voltage (VTSP) transmitted by the host (210) are transmitted to the power management circuit (221, 231), and the power management circuit (221, 231) can modulate the size, waveform, etc. of the input voltage or input current and output them.

[0077] The power management circuit (221, 231) can supply different voltages to each circuit depending on the type of power input from the host (210). The power management circuit (221, 231) can include one or more booster circuits to increase the output voltage, and can include one or more buck circuits to decrease the output voltage.

[0078] The host (210) provides each power in the form of voltage and current, and the main power may have a main voltage of approximately 3.3 V, and the sub-power may have a sub-voltage of 3.3 V. Since the power consumption required for the display operation of the display device (200) is much greater than the power consumption for the touch operation, the display current may be greater than the touch current even if the voltage magnitude is the same.

[0079] In the display circuit (220), the first power management circuit (PMIC-1) (221) can control the intensity, waveform, timing, etc. of the driving signals of the timing controller (T-CON) (222), level shifter (LS) (223), and source driver integrated circuit (SDIC) (224).

[0080] The timing controller (T-CON) (222) can generate signals that control the operation of a source driver integrated circuit (SDIC) (224), a readout integrated circuit (ROIC) (234), a gate driver integrated circuit (GDIC) (not shown), etc.

[0081] The level shifter (LS) (223) can adjust the level of a signal transmitted to a gate driver integrated circuit (GDIC) (not shown).

[0082] The source driver integrated circuit (SDIC) (224) converts a digital signal received from a timing controller (T-CON) (220) into an analog signal and supplies data voltage or data current to the pixels (P) of the panel to display an image.

[0083] In the touch circuit (230), the second power management circuit (PMIC-2) (231) can control the intensity, waveform, timing, etc. of the driving signal to the touch modulation circuit (TMIC) (232), touch microcontroller unit (TMCU) (233), and readout integrated circuit (ROIC) (234).

[0084] The touch modulation circuit (TMIC) (232) can modulate the touch signal and the signals within the panel in synchronization.

[0085] The touch microcontroller unit (TMCU) (233) may be a circuit that processes a touch sensing signal received from a readout integrated circuit (ROIC) (234) into a digital signal.

[0086] A readout integrated circuit (ROIC) (234) may be a circuit that senses a change in electrostatic capacity of a touch electrode (TE) and demodulates it to generate touch data.

[0087] As shown in Fig. 2, when the display circuit (220) and the touch circuit (230) are separated from each other - for example, in an add-on or on-cell type panel - the display voltage (VIN) and the touch voltage (VTSP) are transmitted to separate circuits, so efficient power use may not be possible depending on the driving mode of the panel.

[0088] When the driving mode of the panel is the normal mode, both the display voltage (VIN) and the touch voltage (VTSP) can be received to operate both the display circuit (220) and the touch circuit (230), and when in the sleep mode, the display voltage (VIN) is not received, and only the touch circuit (230) can be operated by receiving the touch voltage (VTSP), and in the deep sleep mode, the output voltage of a logic circuit (not shown) that modulates the touch voltage (VTSP) received from the host (210) is received to implement a minimum function, and a signal for switching the driving mode of the panel can be transmitted and received by communicating with the host (210) through USB communication, I2C communication, etc.

[0089] In the above case, a separate switch (not shown) must be included to keep the display circuit (220) in the OFF state or to modulate the voltage in the touch modulation circuit (TMIC) (232), which causes a problem in that the size of the circuit configuration increases, and if a separate switch (not shown) is not included, there is a problem in that power consumption continuously occurs in the display circuit (220).

[0090] Figure 3 is a drawing explaining the driving mode of the panel.

[0091] Referring to FIG. 3, the driving mode (300) of the panel can be divided into a normal mode, a sleep mode, etc. However, the present disclosure is not limited by such division.

[0092] Normal mode can indicate a state in which the display device performs both display driving and touch driving, and sleep mode can indicate a state in which the display device does not perform display driving but only performs touch sensing.

[0093] In normal mode, both the display circuit and the touch circuit operate, and in sleep mode, the display circuit does not operate and only the touch circuit operates.

[0094] Each driving mode of the panel or display device can be implemented by blocking or selecting the supply of power to the display circuit and the touch circuit.

[0095] For example, in normal mode, the host can provide both display voltage (VIN) and touch voltage (VTSP), and in sleep mode, the host can provide only touch voltage (VTSP).

[0096] In the drawings below, dotted lines in relation to arrows may indicate that the corresponding signal line is off or inactive.

[0097] The following Figures 4 to 10 can be viewed as examples of using the display voltage (VIN) as an enable (EN) signal of a multiplexer (MUX).

[0098] Figures 4 and 5 are first exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0099] FIG. 4 illustrates, for example, the configuration of a power management integrated circuit (420) when both the display panel (DP) and the touch panel (TSP) are turned on. In the above, the on state may indicate a state in which the corresponding function is activated.

[0100] Referring to FIG. 4, the display device (400) may include a multiplexer (MUX) (410), a power management integrated circuit (PMIC) (420), a timing controller (T-CON) (430), a source readout integrated circuit (SRIC) (440), a touch modulation circuit (TMIC) (450), a level shifter (460), a touch microcontroller unit (TMCU) (470), etc.

[0101] The display voltage (VIN) or touch voltage (VTSP) can be input to the multiplexer (410). At this time, the display voltage (VIN) or touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0102] Even when the display device (400) uses an in-cell type panel, the display voltage (VIN) and touch voltage (VTSP) can be transmitted through separate signal lines, as in the case of using an on-cell or add-on type panel.

[0103] The multiplexer (410) can receive the display voltage (VIN) or the touch voltage (VTSP), select all or part of the power signal, and output it to the power management integrated circuit (PMIC) (420).

[0104] When the display device (400) forms an in-cell type panel that combines a display circuit and a touch circuit and includes a source readout integrated circuit (SRIC) (440), etc., the circuit configuration of the display device (400) can be simplified by including a multiplexer (MUX) (410) that selects and outputs a display voltage (VIN) or a touch voltage (VTSP).

[0105] The multiplexer (MUX) (410) can receive an enable (EN) signal through a separate signal line connected to a signal line through which the display voltage (VIN) is transmitted.

[0106] The generation timing of the output signal of the multiplexer (MUX) (410) can be determined in response to the operation timing of the display voltage (VIN).

[0107] A power management integrated circuit (PMIC) (420) can control power delivered to a source readout integrated circuit (SRIC) (440), a touch modulation circuit (TMIC) (450), and a level shifter (460).

[0108] The timing controller (T-CON) (430) can receive voltage (VIN) through a signal line separate from the signal line through which the display voltage (VIN) is transmitted to the power management integrated circuit (PMIC) (420).

[0109] Referring to FIG. 4, the display device (400) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 4, the display device (400) is illustrated with two power circuits, a first power circuit (480) and a second power circuit (490).

[0110] Referring to FIG. 4, the first power circuit (480) is connected to a timing controller (T-CON) (430) and can transmit a display voltage (VIN) to the timing controller (T-CON) (430). At this time, the timing controller (T-CON) (430) can receive display voltages (VIN) of various signal levels from the first power circuit (480) as needed.

[0111] The first power circuit (480) may include, for example, a step down converter or a buck converter (BUCK) that converts the output voltage to a voltage lower than the input voltage.

[0112] The first power circuit (480) can be composed of a set of multiple buck circuits, and can individually control the voltage transmitted to the timing controller (T-CON) (430) by forming multiple signal lines.

[0113] For example, when the display voltage (VIN) transmitted to the first power circuit (480) is 3.3 V, the first power circuit (421) can transmit a voltage of 0.9 V to the timing controller (T-CON) (430) through the first buck signal line, and can transmit a voltage of 1.8 V to the timing controller (T-CON) (430) through the second buck signal line. However, the present disclosure is not limited thereto.

[0114] The first power circuit (480) can reduce the level of the input signal and, if necessary, can block signal transmission by keeping it in an OFF state.

[0115] When a display voltage (VIN) is input through a first power circuit (480), the timing controller (T-CON) (430) can control the operation of the power management integrated circuit (420) according to the transmitted display voltage (VIN). At this time, the operation control may include control of the power management integrated circuit (PMIC) (420) for low power driving of the display device (100).

[0116] In other words, the display voltage (VIN) can turn on (or activate) the power management integrated circuit (PMIC) (420), and the timing controller (T-CON) (430) can control the power control operation of the turned-on power management integrated circuit (PMIC) (420). However, the power management integrated circuit (PMIC) (420) can perform an operation for supplying power even when a power control signal of the timing controller (T-CON) (430) is not received.

[0117] Referring to Fig. 4, since the touch panel (TSP) is also activated, the touch voltage (VTSP) can also be input to the multiplexer (MUX) (410). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0118] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (470). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (470), but may be transmitted to the touch microcontroller unit (TMCU) (470) via the second power circuit (490).

[0119] The second power circuit (490) is connected to the touch microcontroller unit (TMCU) (470) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (470).

[0120] For example, the second power circuit (490) may be identical to the first power circuit (480) described above. Alternatively, the second power circuit (490) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0121] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (470) is 3.3 V, the second power circuit (490) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (470) through the buck signal line. However, the present disclosure is not limited thereto.

[0122] Meanwhile, the power management integrated circuit (PMIC) (420) that has already been turned on by the display voltage (VIN) through the multiplexer (MUX) (410) can control the operation of the touch microcontroller unit (TMCU) (470) when there is a touch input or a touch voltage (VTSP) generated thereby.

[0123] At this time, control of the touch microcontroller unit (TMCU) (470) of the power management integrated circuit (PMIC) (420) may be performed under the control of the timing controller (T-CON) (430). However, this is not limited thereto.

[0124] Referring to FIG. 4, in the display device (400), the multiplexer (MUX) (410) and the power management integrated circuit (PMIC) (430) may be formed as separate circuits. However, the present invention is not limited thereto.

[0125] Additionally, at least one of the first power circuit (480) and the second power circuit (490) may be separately provided outside the power management integrated circuit (PMIC) (420). However, this is not limited thereto.

[0126] Fig. 5, unlike Fig. 4, illustrates the configuration of a power management integrated circuit (420) when the display panel (DP) is in the OFF state and only the touch panel (TSP) is in the ON state.

[0127] Referring to FIG. 5, the display device (400) may include a multiplexer (MUX) (410), a power management integrated circuit (PMIC) (420), a timing controller (T-CON) (430), a source readout integrated circuit (SRIC) (440), a touch modulation circuit (TMIC) (450), a level shifter (LS) (460), a touch microcontroller unit (TMCU) (470), etc., similar to FIG. 4. Therefore, a specific description of each component refers to the above-described content, and the following description focuses on parts that are different from FIG. 4.

[0128] However, at this time, the display voltage (VIN) can be input to the multiplexer (MUX) (410) even though the display panel (DP) is turned off. Only the touch voltage (VTSP) can be input to the multiplexer (410). At this time, the display voltage (VIN) and / or the touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0129] A multiplexer (MUX) (410) can receive a display voltage (VIN) or a touch voltage (VTSP), select all or part of the power signal, and output it to a power management integrated circuit (PMIC) (420).

[0130] The multiplexer (MUX) (410) can receive an enable (EN) signal through a signal line to which the display voltage (VIN) is transmitted. In other words, the display voltage (VIN) itself can serve as an enable (EN) signal. However, the present disclosure is not limited thereto, and the touch voltage (VTSP) itself can also serve as a separate enable signal.

[0131] Accordingly, the timing of generating the output signal of the multiplexer (MUX) (410) can be determined in response to the operation timing of the touch voltage (VTSP) by using the display voltage (VIN) as an enable (EN) signal.

[0132] A power management integrated circuit (PMIC) (420) can control power delivered to a source readout integrated circuit (SRIC) (440), a touch modulation circuit (TMIC) (450), and a level shifter (460).

[0133] At this time, the timing controller (T-CON) (430) may not be able to directly receive the display voltage (VIN) even though it is input to the multiplexer (MUX) (410).

[0134] Referring to FIG. 5, the display device (400) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 5, the display device (400) is illustrated with two power circuits, a first power circuit (480) and a second power circuit (490).

[0135] Referring to FIG. 5, although the first power circuit (480) is connected to the timing controller (T-CON) (430), it is in an off state, i.e., inactive, and therefore cannot transmit the display voltage (VIN) to the timing controller (T-CON) (430).

[0136] The timing controller (T-CON) (430) can transmit a signal for controlling the operation of the power management integrated circuit (PMIC) (420), even though the display voltage (VIN) is not input via the first power circuit (480). At this time, the operation control may include control of the power management integrated circuit (PMIC) (420) for low power driving of the display device (100).

[0137] In other words, the display voltage (VIN) cannot turn on (or activate) the power management integrated circuit (PMIC) (420), but can function as an enable signal for the operation of the multiplexer (MUX) (410), and the timing controller (T-CON) (430) can control the power control operation of the power management integrated circuit (PMIC) (420) even though it does not receive the display voltage (VIN). However, the power management integrated circuit (PMIC) (420) can perform an operation for supplying power even when the power control signal of the timing controller (T-CON) (430) is not received.

[0138] Referring to FIG. 5, since the touch panel (TSP) is activated as described above, the touch voltage (VTSP) can be input to the multiplexer (MUX) (410). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0139] Meanwhile, the touch voltage (VTSP) is input to a multiplexer (MUX) (410) and transmitted to a power management integrated circuit (PMIC) (420), and is used for power supply control to a source readout integrated circuit (SRIC) (440), a touch modulation circuit (TMIC) (450), and a level shifter (LS) (460), and may also be directly transmitted to a touch microcontroller unit (TMCU) (470).

[0140] If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (470), but may be transmitted to the touch microcontroller unit (TMCU) (470) via a second power circuit (490).

[0141] The second power circuit (490) is connected to the touch microcontroller unit (TMCU) (470) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (470).

[0142] For example, the second power circuit (490) may be identical to the first power circuit (480) described above in FIG. 4. Alternatively, the second power circuit (490) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0143] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (470) is 3.3 V, the second power circuit (490) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (470) through the buck signal line. However, the present disclosure is not limited thereto.

[0144] Meanwhile, the power management integrated circuit (PMIC) (420) that has already been turned on by the touch voltage (VTSP) (or timing controller (T-CON) (430)) through the multiplexer (MUX) (410) can control the operation of the touch microcontroller unit (TMCU) (470).

[0145] At this time, control of the touch microcontroller unit (TMCU) (470) of the power management integrated circuit (PMIC) (420) may be performed under the control of the timing controller (T-CON) (430). However, this is not limited thereto.

[0146] Referring to FIG. 5, in the display device (400), the multiplexer (MUX) (410) and the power management integrated circuit (PMIC) (430) may be formed as separate circuits. However, the present invention is not limited thereto.

[0147] Additionally, the second power circuit (490) may be provided separately outside the power management integrated circuit (PMIC) (420). However, this is not limited thereto.

[0148] Figures 6 and 7 are second exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0149] FIG. 6 illustrates, for example, the configuration of a power management integrated circuit (620) when both the display panel (DP) and the touch panel (TSP) are turned on. In the above, the on state may indicate a state in which the corresponding function is activated.

[0150] Referring to FIG. 6, the display device (600) may include a multiplexer (MUX) (610), a power management integrated circuit (PMIC) (620), a timing controller (T-CON) (630), a source readout integrated circuit (SRIC) (640), a touch modulation circuit (TMIC) (650), a level shifter (660), a touch microcontroller unit (TMCU) (670), etc.

[0151] The display voltage (VIN) or touch voltage (VTSP) can be input to the multiplexer (610). At this time, the display voltage (VIN) or touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0152] Even when the display device (600) uses an in-cell type panel, the display voltage (VIN) and touch voltage (VTSP) can be transmitted through separate signal lines, as in the case of using an on-cell or add-on type panel.

[0153] The multiplexer (610) can receive the display voltage (VIN) or the touch voltage (VTSP), select all or part of the power signal, and output it to the power management integrated circuit (PMIC) (620).

[0154] When the display device (600) forms an in-cell type panel that combines a display circuit and a touch circuit and includes a source readout integrated circuit (SRIC) (640), etc., the circuit configuration of the display device (600) can be simplified by including a multiplexer (MUX) (610) that selects and outputs a display voltage (VIN) or a touch voltage (VTSP).

[0155] The multiplexer (MUX) (610) can receive an enable (EN) signal through a separate signal line connected to a signal line through which the display voltage (VIN) is transmitted.

[0156] The generation timing of the output signal of the multiplexer (MUX) (610) can be determined in response to the operation timing of the display voltage (VIN).

[0157] A power management integrated circuit (PMIC) (620) can control power delivered to a timing controller (T-CON) (630), a source readout integrated circuit (SRIC) (640), a touch modulation circuit (TMIC) (650), and a level shifter (660).

[0158] That is, the timing controller (T-CON) (630) can receive the display voltage (VIN) directly from the power management integrated circuit (PMIC) (620) rather than from a separate signal line from the signal line through which the display voltage (VIN) is transmitted to the power management integrated circuit (PMIC) (620).

[0159] Referring to FIG. 6, the display device (600) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 6, the display device (600) is illustrated with one power circuit (680).

[0160] Referring to Fig. 6, since the touch panel (TSP) is also activated, the touch voltage (VTSP) can also be input to the multiplexer (MUX) (610). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0161] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (670). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (670), but may be transmitted to the touch microcontroller unit (TMCU) (670) via a power circuit (680).

[0162] The power circuit (680) is connected to the touch microcontroller unit (TMCU) (670) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (670).

[0163] For example, the power circuit (680) may be identical to the first power circuit (480) described above in FIG. 4. Alternatively, the power circuit (680) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0164] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (670) is 3.3 V, the power circuit (680) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (670) through the buck signal line. However, the present disclosure is not limited thereto.

[0165] Meanwhile, instead of the timing controller (T-CON) (630), the touch microcontroller unit (TMCU) (670) can control the operation of the power management integrated circuit (620). At this time, the operation control may include control of the power management integrated circuit (PMIC) (620) for low power operation of the display device (600).

[0166] In other words, the display voltage (VIN) can turn on (or activate) the power management integrated circuit (PMIC) (620), and the touch microcontroller unit (TMCU) (670) can control the power control operation of the turned-on power management integrated circuit (PMIC) (620). However, the power management integrated circuit (PMIC) (620) can perform an operation for supplying power even when a power control signal of the touch microcontroller unit (TMCU) (670) is not received.

[0167] Meanwhile, the power management integrated circuit (PMIC) (620) that has already been turned on by the display voltage (VIN) through the multiplexer (MUX) (610) can control the operation of the touch microcontroller unit (TMCU) (670) when there is a touch input or a touch voltage (VTSP) generated thereby.

[0168] Referring to FIG. 6, in the display device (600), the multiplexer (MUX) (610) and the power management integrated circuit (PMIC) (620) may be formed as separate circuits. However, the present invention is not limited thereto.

[0169] Additionally, the power circuit (680) may be provided separately outside the power management integrated circuit (PMIC) (620), but is not limited thereto.

[0170] Fig. 7, unlike Fig. 6, illustrates the configuration of a power management integrated circuit (620) in a case where the display panel (DP) is in an OFF state and only the touch panel (TSP) is in an ON state.

[0171] Referring to FIG. 7, the display device (600) may include a multiplexer (MUX) (610), a power management integrated circuit (PMIC) (620), a timing controller (T-CON) (630), a source readout integrated circuit (SRIC) (640), a touch modulation circuit (TMIC) (650), a level shifter (LS) (660), a touch microcontroller unit (TMCU) (670), etc., similar to FIG. 6.

[0172] However, at this time, the display voltage (VIN) may not be input to the multiplexer (MUX) (610) even though the display panel (DP) is turned off. Therefore, only the touch voltage (VTSP) may be input to the multiplexer (MUX) (610). At this time, the touch voltage (VTSP) may be transmitted from, for example, a host (not shown).

[0173] A multiplexer (MUX) (610) can receive only the touch voltage (VTSP) and select all or part of the power signal to output to a power management integrated circuit (PMIC) (620).

[0174] Since only the touch voltage (VTSP) is transmitted to the multiplexer (MUX) (610), the touch voltage (VTSP) itself can be used as an enable (EN) signal.

[0175] The generation timing of the output signal of the multiplexer (MUX) (610) can be determined in response to the operation timing of the touch voltage (VTSP).

[0176] A power management integrated circuit (PMIC) (620) can control power delivered to a source readout integrated circuit (SRIC) (640), a touch modulation circuit (TMIC) (650), and a level shifter (660). Referring to FIG. 7, at this time, the power management integrated circuit (PMIC) (620) may not deliver power to a timing controller (T-CON) (630).

[0177] Referring to FIG. 7, the display device (600) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 7, the display device (600) is illustrated with one power circuit (680).

[0178] As described above, in FIG. 7, since the touch panel (TSP) is in an activated state, the touch voltage (VTSP) can be input to the multiplexer (MUX) (610). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0179] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (670). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (670), but may be transmitted to the touch microcontroller unit (TMCU) (670) via a power circuit (680).

[0180] The power circuit (680) is connected to the touch microcontroller unit (TMCU) (670) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (670).

[0181] The power circuit (680) may be identical to the first power circuit (480) of FIG. 4 described above. Alternatively, the power circuit (680) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0182] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (670) is 3.3 V, the power circuit (680) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (670) through the buck signal line. However, the present disclosure is not limited thereto.

[0183] Meanwhile, instead of the timing controller (T-CON) (630), the touch microcontroller unit (TMCU) (670) can control the operation of the power management integrated circuit (620). At this time, the operation control may include control of the power management integrated circuit (PMIC) (620) for low power operation of the display device (600).

[0184] In other words, the display voltage (VIN) can turn on (or activate) the power management integrated circuit (PMIC) (620), and the touch microcontroller unit (TMCU) (670) can control the power control operation of the turned-on power management integrated circuit (PMIC) (620). However, the power management integrated circuit (PMIC) (620) can perform an operation for supplying power even when a power control signal of the touch microcontroller unit (TMCU) (670) is not received.

[0185] Meanwhile, the power management integrated circuit (PMIC) (620) that has already been turned on by the touch voltage (VTSP) through the multiplexer (MUX) (610) can control the operation of the touch microcontroller unit (TMCU) (670).

[0186] Referring to FIG. 7, in the display device (600), the multiplexer (MUX) (610) and the power management integrated circuit (PMIC) (620) may be formed as separate circuits. However, this is not limited thereto.

[0187] Additionally, the power circuit (680) may be provided separately outside the power management integrated circuit (PMIC) (620), but is not limited thereto.

[0188] Figures 8 and 9 are third exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0189] FIG. 8 illustrates, for example, the configuration of a power management integrated circuit (820) when both the display panel (DP) and the touch panel (TSP) are turned on.

[0190] Referring to FIG. 8, the display device (800) may include a multiplexer (MUX) (810), a power management integrated circuit (PMIC) (820), a timing controller (T-CON) (830), a source readout integrated circuit (SRIC) (840), a touch modulation circuit (TMIC) (850), a level shifter (LS) (860), a touch microcontroller unit (TMCU) (870), etc.

[0191] The display voltage (VIN) or touch voltage (VTSP) can be input to the multiplexer (810). At this time, the display voltage (VIN) or touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0192] Even when the display device (800) uses an in-cell type panel, the display voltage (VIN) and touch voltage (VTSP) can be transmitted through separate signal lines, as in the case of using an on-cell or add-on type panel.

[0193] The multiplexer (810) can receive the display voltage (VIN) or the touch voltage (VTSP), select all or part of the power signal, and output it to the power management integrated circuit (PMIC) (820).

[0194] When the display device (800) forms an in-cell type panel that combines a display circuit and a touch circuit and includes a source readout integrated circuit (SRIC) (840), etc., the circuit configuration of the display device (800) can be simplified by including a multiplexer (MUX) (810) that selects and outputs a display voltage (VIN) or a touch voltage (VTSP).

[0195] The multiplexer (MUX) (810) can receive an enable (EN) signal through a separate signal line connected to a signal line through which the display voltage (VIN) is transmitted.

[0196] The generation timing of the output signal of the multiplexer (MUX) (810) can be determined in response to the operation timing of the display voltage (VIN).

[0197] A power management integrated circuit (PMIC) (820) can control power delivered to a timing controller (T-CON) (830), a source readout integrated circuit (SRIC) (840), a touch modulation circuit (TMIC) (850), and a level shifter (LS) (860).

[0198] Referring to FIG. 8, the display device (800) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 8, the display device (800) is illustrated with one power circuit (880). This will be described later.

[0199] The display voltage (VIN) can be turned on (or activated) by using the display voltage and enable (EN) signal of the power management integrated circuit (PMIC) (820) through the multiplexer (MUX) (810), and the display voltage (VIN) can also be directly transmitted to the power management integrated circuit (PMIC) (820) as a separate signal line for the timing controller (T-CON) (830). In this case, the display voltage (VIN) that is directly input to the power management integrated circuit (PMIC) (820) without going through the multiplexer (MUX) (810) for the timing controller (T-CON) (830) may have a signal level that is the same as or different from the display voltage (VIN) that is input to the multiplexer (MUX) (810).

[0200] Referring to Fig. 8, since the touch panel (TSP) is also activated, the touch voltage (VTSP) can also be input to the multiplexer (MUX) (810). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0201] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (870). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (870), but may be transmitted to the touch microcontroller unit (TMCU) (870) via a power circuit (880).

[0202] The power circuit (880) is connected to the touch microcontroller unit (TMCU) (870) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (870).

[0203] For example, the second power circuit (880) may be identical to the first power circuit (480) of FIG. 4 described above. Alternatively, the power circuit (880) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0204] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (870) is 3.3 V, the power circuit (880) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (870) through the buck signal line. However, the present disclosure is not limited thereto.

[0205] Meanwhile, the power management integrated circuit (PMIC) (820) that has already been turned on by the display voltage (VIN) through the multiplexer (MUX) (810) can control the operation of the touch microcontroller unit (TMCU) (870) when there is a touch input or a touch voltage (VTSP) generated thereby.

[0206] At this time, control of the touch microcontroller unit (TMCU) (870) of the power management integrated circuit (PMIC) (820) may be performed under the control of the timing controller (T-CON) (830). However, this is not limited thereto.

[0207] Referring to FIG. 8, in the display device (800), the multiplexer (MUX) (810) and the power management integrated circuit (PMIC) (820) may be formed as separate circuits. However, the present invention is not limited thereto.

[0208] Additionally, the power circuit (880) may be provided separately outside the power management integrated circuit (PMIC) (820), but is not limited thereto.

[0209] Fig. 9, unlike Fig. 8, illustrates the configuration of a power management integrated circuit (820) in a case where the display panel (DP) is in an OFF state and only the touch panel (TSP) is in an ON state.

[0210] Referring to FIG. 9, the display device (800) may include a multiplexer (MUX) (810), a power management integrated circuit (PMIC) (820), a timing controller (T-CON) (830), a source readout integrated circuit (SRIC) (840), a touch modulation circuit (TMIC) (850), a level shifter (860), a touch microcontroller unit (TMCU) (870), etc., similar to FIG. 8.

[0211] However, at this time, the display voltage (VIN) may not be input to the multiplexer (MUX) (810) even though the display panel (DP) is turned off. Therefore, only the touch voltage (VTSP) may be input to the multiplexer (810). At this time, the touch voltage (VTSP) may be transmitted from, for example, a host (not shown).

[0212] A multiplexer (MUX) (810) can receive only the touch voltage (VTSP) and select all or part of the power signal to output to a power management integrated circuit (PMIC) (820).

[0213] Since only the touch voltage (VTSP) is transmitted to the multiplexer (MUX) (810), the touch voltage (VTSP) itself can be used as an enable (EN) signal.

[0214] The generation timing of the output signal of the multiplexer (MUX) (810) can be determined in response to the operation timing of the touch voltage (VTSP).

[0215] A power management integrated circuit (PMIC) (820) can control power delivered to a source readout integrated circuit (SRIC) (840), a touch modulation circuit (TMIC) (850), and a level shifter (860). Referring to FIG. 9, at this time, the power management integrated circuit (PMIC) (820) may not deliver power to a timing controller (T-CON) (830).

[0216] Referring to FIG. 9, the display device (400) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 9, the display device (800) is illustrated with one power circuit (880).

[0217] As described above, in FIG. 9, since the touch panel (TSP) is in an activated state, the touch voltage (VTSP) can be input to the multiplexer (MUX) (810). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0218] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (870). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (870), but may be transmitted to the touch microcontroller unit (TMCU) (870) via a power circuit (880).

[0219] The power circuit (880) is connected to the touch microcontroller unit (TMCU) (870) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (870).

[0220] The power circuit (880) may be identical to the first power circuit (480) of FIG. 4 described above. Alternatively, the power circuit (880) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0221] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (870) is 3.3 V, the power circuit (880) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (870) through the buck signal line. However, the present disclosure is not limited thereto.

[0222] Meanwhile, the power management integrated circuit (PMIC) (820) that has already been turned on by the touch voltage (VTSP) through the multiplexer (MUX) (810) can control the operation of the touch microcontroller unit (TMCU) (870).

[0223] Referring to FIG. 9, in the display device (800), the multiplexer (MUX) (810) and the power management integrated circuit (PMIC) (820) may be formed as separate circuits. However, the present invention is not limited thereto.

[0224] Additionally, the power circuit (880) may be provided separately outside the power management integrated circuit (PMIC) (820), but is not limited thereto.

[0225] Figure 10 is a first example flowchart of a power management control method according to the present embodiment.

[0226] Referring to Fig. 10, a first example of a power management control method is described.

[0227] In steps S1002 and S1004, the host (not shown) can determine whether Sleep / Lid is on / off in normal mode (when the display panel (DP) is on and the touch panel (TSP) is activated). At this time, step S1004 can be determined by whether the host air display voltage (VIN) is off.

[0228] As a result of the S1004 step judgment, if it is sleep / read off mode, the host can still judge it as normal mode.

[0229] On the other hand, in step S1006, if the host determines in step S1004 that it is in sleep / read-on mode, it may no longer determine it as normal mode and request the microcontroller unit (MCU) to enter Wake On Touch (WOT) mode. In this case, the user / administrator may need to confirm the standby mode and WOT mode.

[0230] At this time, the power management integrated circuit (PMIC) and the timing controller (T-CON) can be turned off by the host. In the above, turning off the power management integrated circuit (PMIC) can indicate dropping the panel-on signal level to low. In other words, when the power management integrated circuit (PMIC) is turned off, all of the power management integrated circuit (PMIC) output pins can be high (All-H).

[0231] At step S1008, the multiplexer (MUX) can be enabled (EN) by the display voltage (VIN). Here, being enabled can indicate that the multiplexer (MUX) is controlled to perform power supply conversion. At this time, the panel-on signal level can change from low to high (HI). Sufficient conversion time is required, and this can be processed by the touch microcontroller unit (TMCU).

[0232] At step S1010, the microcontroller can identify a touch detection sensing mode. At this time, the display panel can be turned off while a touch is detected or sensed.

[0233] At step S1012, the microcontroller can determine whether the touch detection intensity exceeds a threshold.

[0234] At step S1014, the microcontroller may receive a wakeup command from the host if the touch detection intensity is below a threshold. In this case, the host may wake up or receive a wakeup signal from another device, such as an input means such as a mouse or keyboard.

[0235] At step S1016, the microcontroller can send a resume signal to the host if the touch detection intensity exceeds the threshold.

[0236] At step S1018, the host may receive the resume signal and transmit a wake-up command to the touch microcontroller unit (TMCU).

[0237] At step S1020, the host can set the display voltage (VIN) to power on and cause power supply conversion to occur through a multiplexer (MUX).

[0238] At step S1022, both the power management integrated circuit (PMIC) and the timing controller (T-CON) can be turned on. At this time, the panel-on signal can remain high, i.e., in a high state. Therefore, as in step S1002, the display device can enter normal mode.

[0239] Below, FIGS. 11 to 17 describe examples of transmitting an enable (EN) signal from a touch microcontroller unit (TMCU) to a multiplexer (MUX).

[0240] Figures 11 and 12 are fourth exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0241] FIG. 11 illustrates, for example, the configuration of a power management integrated circuit (1120) when both the display panel (DP) and the touch panel (TSP) are turned on.

[0242] Referring to FIG. 11, the display device (1100) may include a multiplexer (MUX) (1110), a power management integrated circuit (PMIC) (1120), a timing controller (T-CON) (1130), a source readout integrated circuit (SRIC) (1140), a touch modulation circuit (TMIC) (1150), a level shifter (LS) (1160), a touch microcontroller unit (TMCU) (1170), etc.

[0243] The display voltage (VIN) or touch voltage (VTSP) can be input to a multiplexer (MUX) (1110). At this time, the display voltage (VIN) or touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0244] Even when the display device (1100) uses an in-cell type panel, the display voltage (VIN) and touch voltage (VTSP) can be transmitted through separate signal lines, as in the case where an on-cell or add-on type panel is used.

[0245] A multiplexer (MUX) (1110) can receive a display voltage (VIN) or a touch voltage (VTSP), select all or part of the power signal, and output it to a power management integrated circuit (PMIC) (1120).

[0246] When the display device (1100) forms an in-cell type panel that combines a display circuit and a touch circuit and includes a source readout integrated circuit (SRIC) (1140), etc., the circuit configuration of the display device (1100) can be simplified by including a multiplexer (MUX) (1110) that selects and outputs a display voltage (VIN) or a touch voltage (VTSP).

[0247] The multiplexer (MUX) (1110) can receive an enable (EN) signal through a signal line separate from the signal line through which the display voltage (VIN) and the touch voltage (VTSP) are transmitted. As described above, for example, the multiplexer (MUX) (1110) can receive an enable (EN) signal from the touch microcontroller unit (TMCU) (1170). In other words, the touch microcontroller unit (TMCU) (1170) can activate the multiplexer (MUX) (1110).

[0248] In FIG. 11, when an enable (EN) signal is received from a touch microcontroller unit (TMCU) (1170), the generation timing of an output signal of a multiplexer (MUX) (1110) can be determined in response to the operation timing of the display voltage (VIN).

[0249] A power management integrated circuit (PMIC) (1120) can control power delivered to a source readout integrated circuit (SRIC) (1140), a touch modulation circuit (TMIC) (1150), and a level shifter (1160).

[0250] The timing controller (T-CON) (1130) can receive voltage (VIN) through a signal line separate from the signal line through which the display voltage (VIN) is transmitted to the power management integrated circuit (PMIC) (1120).

[0251] Referring to FIG. 11, the display device (1100) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 11, the display device (1100) is illustrated with two power circuits, a first power circuit (1180) and a second power circuit (1190).

[0252] Referring to FIG. 11, the first power circuit (1180) is connected to a timing controller (T-CON) (1130) and can transmit a display voltage (VIN) to the timing controller (T-CON) (1130). At this time, the timing controller (T-CON) (1130) can receive display voltages (VIN) of various signal levels from the first power circuit (1180) as needed.

[0253] The first power circuit (1180) may include, for example, a step down converter or a buck converter (BUCK) that converts the output voltage to a voltage lower than the input voltage.

[0254] The first power circuit (1180) can be composed of a set of multiple buck circuits, and can individually control the voltage transmitted to the timing controller (T-CON) (1130) by forming multiple signal lines.

[0255] For example, when the display voltage (VIN) transmitted to the first power circuit (1180) is 3.3 V, the first power circuit (1180) can transmit a voltage of 0.9 V to the timing controller (T-CON) (1130) through the first buck signal line, and can transmit a voltage of 1.8 V to the timing controller (T-CON) (1130) through the second buck signal line. However, the present disclosure is not limited thereto.

[0256] The first power circuit (1180) can reduce the level of the input signal and, if necessary, can block signal transmission by keeping it in an OFF state.

[0257] When a display voltage (VIN) is input through a first power circuit (1180), the timing controller (T-CON) (1130) can control the operation of the power management integrated circuit (1120) according to the transmitted display voltage (VIN). At this time, the operation control may include control of the power management integrated circuit (PMIC) (1120) for low power operation of the display device (1100).

[0258] In other words, the display voltage (VIN) can turn on (or activate) the power management integrated circuit (PMIC) (1120), and the timing controller (T-CON) (1130) can control the power control operation of the turned-on power management integrated circuit (PMIC) (1120). However, the power management integrated circuit (PMIC) (1120) can perform an operation for supplying power even when a power control signal of the timing controller (T-CON) (1130) is not received.

[0259] Referring to Fig. 11, since the touch panel (TSP) is also activated, the touch voltage (VTSP) can also be input to the multiplexer (MUX) (1110). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0260] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (1170). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (1170), but may be transmitted to the touch microcontroller unit (TMCU) (1170) via the second power circuit (1190).

[0261] The second power circuit (1190) is connected to the touch microcontroller unit (TMCU) (1170) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (1170).

[0262] For example, the second power circuit (1190) may be identical to the first power circuit (1180) described above. Alternatively, the second power circuit (1190) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0263] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (1170) is 3.3 V, the second power circuit (1190) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (1170) through the buck signal line. However, the present disclosure is not limited thereto.

[0264] Meanwhile, the power management integrated circuit (PMIC) (1120) that has already been turned on by the display voltage (VIN) through the multiplexer (MUX) (1110) can control the operation of the touch microcontroller unit (TMCU) (1170) when there is a touch input or a touch voltage (VTSP) generated thereby.

[0265] At this time, control of the touch microcontroller unit (TMCU) (1170) of the power management integrated circuit (PMIC) (1120) may be performed under the control of the timing controller (T-CON) (1130). However, this is not limited thereto.

[0266] Referring to FIG. 11, in the display device (1100), a multiplexer (MUX) (1110) and a power management integrated circuit (PMIC) (1130) may be formed as separate circuits. However, this is not limited thereto.

[0267] Additionally, at least one of the first power circuit (1180) and the second power circuit (1190) may be separately provided outside the power management integrated circuit (PMIC) (1120), but is not limited thereto.

[0268] Fig. 12, unlike Fig. 11, illustrates the configuration of a power management integrated circuit (1120) when the display panel (DP) is in the OFF state and only the touch panel (TSP) is in the ON state.

[0269] Referring to FIG. 12, the display device (1100) may include a multiplexer (MUX) (1110), a power management integrated circuit (PMIC) (1120), a timing controller (T-CON) (1130), a source readout integrated circuit (SRIC) (1140), a touch modulation circuit (TMIC) (1150), a level shifter (LS) (1160), a touch microcontroller unit (TMCU) (1170), etc., similar to FIG. 11. Therefore, a specific description of each component refers to the above-described content, and the following description focuses on parts that are different from FIG. 11.

[0270] However, at this time, the display voltage (VIN) may be input to the multiplexer (MUX) (1110) even though the display panel (DP) is turned off. However, in Fig. 11, the touch voltage (VTSP) may be input to the multiplexer (1110). At this time, the display voltage (VIN) and / or the touch voltage (VTSP) may be transmitted from, for example, a host (not shown).

[0271] A multiplexer (MUX) (1110) can receive a display voltage (VIN) or a touch voltage (VTSP), select all or part of the power signal, and output it to a power management integrated circuit (PMIC) (1120).

[0272] The multiplexer (MUX) (1110) can receive an enable (EN) signal through a signal line separate from the signal line through which the display voltage (VIN) and the touch voltage (VTSP) are transmitted, i.e., a signal line connected from the touch microcontroller unit (TMCU) (1170).

[0273] Accordingly, based on the enable (EN) signal, the generation timing of the output signal of the multiplexer (MUX) (1110) can be determined in response to the operation timing of the touch voltage (VTSP).

[0274] A power management integrated circuit (PMIC) (1120) can control power delivered to a source readout integrated circuit (SRIC) (1140), a touch modulation circuit (TMIC) (1150), and a level shifter (1160).

[0275] At this time, the timing controller (T-CON) (1130) may not be able to receive the display voltage (VIN) and touch voltage (VTSP) from the multiplexer (MUX) (1110).

[0276] Referring to FIG. 12, the display device (1100) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 12, the display device (1100) is illustrated with two power circuits, a first power circuit (1180) and a second power circuit (1190).

[0277] Referring to FIG. 12, although the first power circuit (1180) is connected to the timing controller (T-CON) (1130), it is in an off state, i.e., inactive, so the display voltage (VIN) cannot be transmitted to the timing controller (T-CON) (1130).

[0278] The timing controller (T-CON) (1130) can transmit a signal for controlling the operation of the power management integrated circuit (PMIC) (1120), even though the display voltage (VIN) is not input via the first power circuit (1180). At this time, the operation control may include control of the power management integrated circuit (PMIC) (1120) for low power operation of the display device (1100).

[0279] The timing controller (T-CON) (1130) can control the power control operation of the power management integrated circuit (PMIC) (1120) even though it does not receive the display voltage (VIN). However, the power management integrated circuit (PMIC) (1120) can perform the operation for supplying power even when the power control signal of the timing controller (T-CON) (1130) is not received.

[0280] Referring to FIG. 12, since the touch panel (TSP) is activated as described above, the touch voltage (VTSP) can be input to the multiplexer (MUX) (1110). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0281] Meanwhile, the touch voltage (VTSP) is input to a multiplexer (MUX) (1110) and transmitted to a power management integrated circuit (PMIC) (1120), and is used for power supply control to a source readout integrated circuit (SRIC) (1140), a touch modulation circuit (TMIC) (1150), and a level shifter (LS) (1160), and may also be directly transmitted to a touch microcontroller unit (TMCU) (1170).

[0282] If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (1170), but may be transmitted to the touch microcontroller unit (TMCU) (1170) via a second power circuit (1190).

[0283] The second power circuit (1190) is connected to the touch microcontroller unit (TMCU) (1170) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (1170).

[0284] For example, the second power circuit (1190) may be identical to the first power circuit (480) described above in FIG. 4. Alternatively, the second power circuit (1190) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0285] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (1170) is 3.3 V, the second power circuit (1190) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (1170) through the buck signal line. However, the present disclosure is not limited thereto.

[0286] Meanwhile, the power management integrated circuit (PMIC) (1120) that has already been turned on by the touch voltage (VTSP) (or timing controller (T-CON) (1130)) through the multiplexer (MUX) (1110) can control the operation of the touch microcontroller unit (TMCU) (1170).

[0287] At this time, control of the touch microcontroller unit (TMCU) (1170) of the power management integrated circuit (PMIC) (1120) may be performed under the control of the timing controller (T-CON) (1130). However, this is not limited thereto.

[0288] Referring to FIG. 12, in the display device (1100), the multiplexer (MUX) (1110) and the power management integrated circuit (PMIC) (1130) may be formed as separate circuits. However, this is not limited thereto.

[0289] Additionally, the second power circuit (1190) may be provided separately outside the power management integrated circuit (PMIC) (1120), but is not limited thereto.

[0290] Figures 13 and 14 are fifth exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0291] In FIGS. 13 and 14, unlike FIGS. 11 and 12 described above, the power management integrated circuit (PMIC) is not subject to operational control by the timing controller (T-CON). However, in this case, the power management integrated circuit (PMIC) may be operationally controlled by the touch microcontroller unit (TMCU) instead of the timing controller (T-CON).

[0292] FIG. 13 illustrates, for example, the configuration of a power management integrated circuit (1320) when both the display panel (DP) and the touch panel (TSP) are turned on.

[0293] Referring to FIG. 13, the display device (1300) may include a multiplexer (MUX) (1310), a power management integrated circuit (PMIC) (1320), a timing controller (T-CON) (1330), a source readout integrated circuit (SRIC) (1340), a touch modulation circuit (TMIC) (1350), a level shifter (LS) (1360), a touch microcontroller unit (TMCU) (1370), etc.

[0294] The display voltage (VIN) or touch voltage (VTSP) can be input to a multiplexer (MUX) (1310). At this time, the display voltage (VIN) or touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0295] Even when the display device (1300) uses an in-cell type panel, the display voltage (VIN) and touch voltage (VTSP) can be transmitted through separate signal lines, as in the case of using an on-cell or add-on type panel.

[0296] The multiplexer (1310) can receive the display voltage (VIN) or the touch voltage (VTSP), select all or part of the power signal, and output it to the power management integrated circuit (PMIC) (1320).

[0297] When the display device (1300) forms an in-cell type panel that combines a display circuit and a touch circuit and includes a source readout integrated circuit (SRIC) (1340), etc., the circuit configuration of the display device (1300) can be simplified by including a multiplexer (MUX) (1310) that selects and outputs a display voltage (VIN) or a touch voltage (VTSP).

[0298] The multiplexer (MUX) (1310) can receive an enable (EN) signal through a signal line separate from the signal line through which the display voltage (VIN) and the touch voltage (VTSP) are transmitted. In this case, the enable (EN) signal can be transmitted to the multiplexer (MUX) (1310) by, for example, a touch microcontroller unit (TMCU) (1370).

[0299] When the above enable (EN) signal is received, the generation timing of the output signal of the multiplexer (MUX) (1310) can be determined in response to the operation timing of the display voltage (VIN).

[0300] A power management integrated circuit (PMIC) (1320) can control power delivered to a timing controller (T-CON) (1330), a source readout integrated circuit (SRIC) (1340), a touch modulation circuit (TMIC) (1350), and a level shifter (LS) (1360).

[0301] That is, the timing controller (T-CON) (1330) can receive the display voltage (VIN) directly from the power management integrated circuit (PMIC) (1320) rather than from a separate signal line from the signal line through which the display voltage (VIN) is transmitted to the power management integrated circuit (PMIC) (1320).

[0302] Referring to FIG. 13, the display device (1300) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 13, the display device (1300) is illustrated with one power circuit (1380).

[0303] Referring to Fig. 13, since the touch panel (TSP) is also activated, the touch voltage (VTSP) can also be input to the multiplexer (MUX) (1310). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0304] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (1370). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (1370), but may be transmitted to the touch microcontroller unit (TMCU) (1370) via a power circuit (1380).

[0305] The power circuit (1380) is connected to the touch microcontroller unit (TMCU) (1370) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (1370).

[0306] For example, the power circuit (1380) may be identical to the first power circuit (480) described above in FIG. 4. Alternatively, the power circuit (1380) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0307] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (1370) is 3.3 V, the power circuit (1380) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (670) through the buck signal line. However, the present disclosure is not limited thereto.

[0308] Meanwhile, instead of the timing controller (T-CON) (1330), the touch microcontroller unit (TMCU) (1370) can control the operation of the power management integrated circuit (1320). At this time, the operation control may include control of the power management integrated circuit (PMIC) (1320) for low power operation of the display device (1300).

[0309] In other words, the display voltage (VIN) can turn on (or activate) the power management integrated circuit (PMIC) (1320), and the touch microcontroller unit (TMCU) (1370) can control the power control operation of the turned-on power management integrated circuit (PMIC) (1320). However, the power management integrated circuit (PMIC) (1320) can perform an operation for supplying power even when a power control signal of the touch microcontroller unit (TMCU) (1370) is not received.

[0310] Meanwhile, the power management integrated circuit (PMIC) (1320) that has already been turned on by the display voltage (VIN) through the multiplexer (MUX) (1310) can control the operation of the touch microcontroller unit (TMCU) (1370) when there is a touch input or a touch voltage (VTSP) generated thereby.

[0311] Referring to FIG. 13, in the display device (1300), a multiplexer (MUX) (1310) and a power management integrated circuit (PMIC) (1320) may be formed as separate circuits. However, this is not limited thereto.

[0312] Additionally, the power circuit (1380) may be provided separately outside the power management integrated circuit (PMIC) (1320), but is not limited thereto.

[0313] Fig. 14, unlike Fig. 13, illustrates the configuration of a power management integrated circuit (1320) in a case where the display panel (DP) is in an OFF state and only the touch panel (TSP) is in an ON state.

[0314] Referring to FIG. 14, the display device (1300) may include a multiplexer (MUX) (1310), a power management integrated circuit (PMIC) (1320), a timing controller (T-CON) (1330), a source readout integrated circuit (SRIC) (1340), a touch modulation circuit (TMIC) (1350), a level shifter (LS) (1360), a touch microcontroller unit (TMCU) (1370), etc., similar to FIG. 13.

[0315] However, at this time, the display voltage (VIN) may not be input to the multiplexer (MUX) (1310) even though the display panel (DP) is turned off. Therefore, only the touch voltage (VTSP) may be input to the multiplexer (MUX) (1310). At this time, the touch voltage (VTSP) may be transmitted from, for example, a host (not shown).

[0316] A multiplexer (MUX) (1310) can receive only the touch voltage (VTSP) and select all or part of the power signal to output to a power management integrated circuit (PMIC) (1320).

[0317] Since only the touch voltage (VTSP) is transmitted to the multiplexer (MUX) (1310), the touch voltage (VTSP) itself can be used as an enable (EN) signal. However, as shown in FIG. 14 and described above, the enable (EN) signal of the multiplexer (MUX) (1310) can be transmitted by the (output of) the touch microcontroller unit (TMCU) (1370).

[0318] When an enable (EN) signal is received from a touch microcontroller unit (TMCU) (1370), the generation timing of an output signal of a multiplexer (MUX) (1310) can be determined in response to the operation timing of the touch voltage (VTSP).

[0319] A power management integrated circuit (PMIC) (1320) can control power delivered to a source readout integrated circuit (SRIC) (1340), a touch modulation circuit (TMIC) (1350), and a level shifter (1360). Referring to FIG. 14, at this time, the power management integrated circuit (PMIC) (1320) may not deliver power to a timing controller (T-CON) (1330).

[0320] Referring to FIG. 14, the display device (1300) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 14, the display device (1300) is illustrated with one power circuit (1380).

[0321] As described above, in FIG. 14, since the touch panel (TSP) is in an activated state, the touch voltage (VTSP) can be input to the multiplexer (MUX) (1310). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0322] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (1370). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (1370), but may be transmitted to the touch microcontroller unit (TMCU) (1370) via a power circuit (1380).

[0323] The power circuit (1380) is connected to the touch microcontroller unit (TMCU) (1370) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (1370).

[0324] The power circuit (1380) may be identical to the first power circuit (480) of FIG. 4 described above. Alternatively, the power circuit (1380) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0325] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (1370) is 3.3 V, the power circuit (1380) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (1370) through the buck signal line. However, the present disclosure is not limited thereto.

[0326] Meanwhile, instead of the timing controller (T-CON) (1330), the touch microcontroller unit (TMCU) (1370) can control the operation of the power management integrated circuit (1320). At this time, the operation control may include control of the power management integrated circuit (PMIC) (1320) for low power operation of the display device (1300).

[0327] In other words, the touch voltage (VTSP) can turn on (or activate) the power management integrated circuit (PMIC) (1320), and the touch microcontroller unit (TMCU) (1370) can control the power control operation of the turned-on power management integrated circuit (PMIC) (1320). However, the power management integrated circuit (PMIC) (1320) can perform an operation for supplying power even when a power control signal of the touch microcontroller unit (TMCU) (670) is not received.

[0328] Meanwhile, the power management integrated circuit (PMIC) (1320) that has already been turned on by the touch voltage (VTSP) through the multiplexer (MUX) (1310) can control the operation of the touch microcontroller unit (TMCU) (1370).

[0329] Referring to FIG. 14, in the display device (1300), the multiplexer (MUX) (1310) and the power management integrated circuit (PMIC) (1320) may be formed as separate circuits. However, this is not limited thereto.

[0330] Additionally, the power circuit (1380) may be provided separately outside the power management integrated circuit (PMIC) (1320), but is not limited thereto.

[0331] Figures 15 and 16 are sixth exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0332] FIG. 15 illustrates, for example, the configuration of a power management integrated circuit (1520) when both the display panel (DP) and the touch panel (TSP) are turned on.

[0333] Referring to FIG. 15, the display device (1500) may include a multiplexer (MUX) (1510), a power management integrated circuit (PMIC) (1520), a timing controller (T-CON) (1530), a source readout integrated circuit (SRIC) (1540), a touch modulation circuit (TMIC) (1550), a level shifter (LS) (1560), a touch microcontroller unit (TMCU) (1570), etc.

[0334] The display voltage (VIN) or touch voltage (VTSP) can be input to the multiplexer (1510). At this time, the display voltage (VIN) or touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0335] Even when the display device (1500) uses an in-cell type panel, the display voltage (VIN) and touch voltage (VTSP) can be transmitted through separate signal lines, as in the case of using an on-cell or add-on type panel.

[0336] The multiplexer (1510) can receive the display voltage (VIN) or the touch voltage (VTSP), select all or part of the power signal, and output it to the power management integrated circuit (PMIC) (1520).

[0337] When the display device (1500) forms an in-cell type panel that combines a display circuit and a touch circuit and includes a source readout integrated circuit (SRIC) (1540), etc., the circuit configuration of the display device (1500) can be simplified by including a multiplexer (MUX) (1510) that selects and outputs a display voltage (VIN) or a touch voltage (VTSP).

[0338] The multiplexer (MUX) (1510) can receive an enable (EN) signal through a signal line separate from the signal line through which the display voltage (VIN) and the touch voltage (VTSP) are transmitted. At this time, as shown in FIG. 14 described above, the enable (EN) signal of the multiplexer (MUX) (1510) can be transmitted by the touch microcontroller unit (TMCU) (1570).

[0339] When an enable (EN) signal is transmitted from the touch microcontroller unit (TMCU) (1570), the generation timing of the output signal of the multiplexer (MUX) (1510) can be determined in response to the operation timing of the display voltage (VIN).

[0340] A power management integrated circuit (PMIC) (1520) can control power delivered to a timing controller (T-CON) (1530), a source readout integrated circuit (SRIC) (1540), a touch modulation circuit (TMIC) (1550), and a level shifter (LS) (1560).

[0341] Referring to FIG. 15, the display device (1500) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 15, the display device (1500) is illustrated with one power circuit (1580). This will be described later.

[0342] The display voltage (VIN) can turn on (or activate) the power management integrated circuit (PMIC) (420) through the multiplexer (MUX) (1510), and can also be directly transmitted to the power management integrated circuit (PMIC) (1520) as a separate signal line for the timing controller (T-CON) (1530). In this case, the display voltage (VIN) directly input to the power management integrated circuit (PMIC) (1520) without going through the multiplexer (MUX) (510) for the timing controller (T-CON) (1530) may have a signal level that is the same as or different from the display voltage (VIN) input to the multiplexer (MUX) (1510).

[0343] Referring to Fig. 15, since the touch panel (TSP) is also activated, the touch voltage (VTSP) can also be input to the multiplexer (MUX) (1510). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0344] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (1570). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (1570), but may be transmitted to the touch microcontroller unit (TMCU) (1570) via a power circuit (1580).

[0345] The power circuit (1580) is connected to the touch microcontroller unit (TMCU) (1570) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (1570).

[0346] For example, the power circuit (1580) may be identical to the first power circuit (480) of FIG. 4 described above. Alternatively, the power circuit (1580) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0347] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (1570) is 3.3 V, the power circuit (1580) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (1570) through the buck signal line. However, the present disclosure is not limited thereto.

[0348] Meanwhile, the power management integrated circuit (PMIC) (1520) that has already been turned on by the display voltage (VIN) through the multiplexer (MUX) (1510) can control the operation of the touch microcontroller unit (TMCU) (1570) when there is a touch input or a touch voltage (VTSP) generated thereby.

[0349] At this time, control of the touch microcontroller unit (TMCU) (1570) of the power management integrated circuit (PMIC) (1520) may be performed under the control of the timing controller (T-CON) (1530), but is not limited thereto.

[0350] Referring to FIG. 15, in the display device (1500), a multiplexer (MUX) (1510) and a power management integrated circuit (PMIC) (1520) may be formed as separate circuits. However, this is not limited thereto.

[0351] Additionally, the power circuit (1580) may be provided separately outside the power management integrated circuit (PMIC) (1520), but is not limited thereto.

[0352] Fig. 16 illustrates the configuration of a power management integrated circuit (1520) in a case where, unlike Fig. 15, the display panel (DP) is in an OFF state and only the touch panel (TSP) is in an ON state.

[0353] Referring to FIG. 16, the display device (1500) may include a multiplexer (MUX) (1510), a power management integrated circuit (PMIC) (1520), a timing controller (T-CON) (1530), a source readout integrated circuit (SRIC) (1540), a touch modulation circuit (TMIC) (1550), a level shifter (LS) (1560), a touch microcontroller unit (TMCU) (1570), etc., similar to FIG. 15.

[0354] However, at this time, the display voltage (VIN) may not be input to the multiplexer (MUX) (1510) even though the display panel (DP) is turned off. Therefore, only the touch voltage (VTSP) may be input to the multiplexer (1510). At this time, the touch voltage (VTSP) may be transmitted from, for example, a host (not shown).

[0355] A multiplexer (MUX) (1510) can receive only the touch voltage (VTSP) and select all or part of the power signal to output to a power management integrated circuit (PMIC) (1520).

[0356] Since only the touch voltage (VTSP) is transmitted to the multiplexer (MUX) (1510), the touch voltage (VTSP) itself can be used as an enable (EN) signal. However, as described above and illustrated in FIG. 16, the enable (EN) signal can use the output of the touch microcontroller unit (TMCU) (1570). That is, the touch microcontroller unit (TMCU) (1570) can transmit the enable (EN) signal to the multiplexer (MUX) (1510).

[0357] When an enable (EN) signal is received from a touch microcontroller unit (TMCU) (1570), the generation timing of an output signal of a multiplexer (MUX) (1510) can be determined in response to the operation timing of the touch voltage (VTSP).

[0358] A power management integrated circuit (PMIC) (1520) can control power delivered to a source readout integrated circuit (SRIC) (1540), a touch modulation circuit (TMIC) (1550), and a level shifter (1560). Referring to FIG. 16, at this time, the power management integrated circuit (PMIC) (1520) may not deliver power to a timing controller (T-CON) (1530).

[0359] Referring to FIG. 16, the display device (1500) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 16, the display device (1500) is illustrated with one power circuit (1580).

[0360] As described above, in FIG. 16, since the touch panel (TSP) is in an activated state, the touch voltage (VTSP) can be input to the multiplexer (MUX) (1510). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0361] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (1570). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (1570), but may be transmitted to the touch microcontroller unit (TMCU) (1570) via a power circuit (1580).

[0362] The power circuit (1580) is connected to the touch microcontroller unit (TMCU) (1570) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (1570).

[0363] The power circuit (1580) may be identical to the first power circuit (480) of FIG. 4 described above. Alternatively, the power circuit (1580) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0364] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (1570) is 3.3 V, the power circuit (1580) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (1570) through the buck signal line. However, the present disclosure is not limited thereto.

[0365] Meanwhile, the power management integrated circuit (PMIC) (1520) that has already been turned on by the touch voltage (VTSP) through the multiplexer (MUX) (1510) can control the operation of the touch microcontroller unit (TMCU) (1570).

[0366] Referring to FIG. 16, in the display device (1500), the multiplexer (MUX) (1510) and the power management integrated circuit (PMIC) (1520) may be formed as separate circuits. However, this is not limited thereto.

[0367] Additionally, the power circuit (1580) may be provided separately outside the power management integrated circuit (PMIC) (1520), but is not limited thereto.

[0368] Figure 17 is a second example flowchart of a power management control method according to the present embodiment.

[0369] Referring to Fig. 17, a second example of a power management control method is described.

[0370] In steps S1702 and S1704, the host (not shown) can determine whether Sleep / Lid is on / off in normal mode (when the display panel (DP) is on and the touch panel (TSP) is activated). At this time, step S1704 can be determined by whether the host air display voltage (VIN) is off.

[0371] As a result of the S1704 step judgment, if it is sleep / read-off mode, the host can still judge it as normal mode.

[0372] On the other hand, at step S1706, if the host determines at step S1704 that it is in sleep / read-on mode, it may no longer determine it as normal mode and request the microcontroller unit (MCU) to enter Wake On Touch (WOT) mode. In this case, the user / administrator may need to confirm the standby mode and WOT mode.

[0373] At this time, the power management integrated circuit (PMIC) and the timing controller (T-CON) can be turned off by the host. In the above, turning off the power management integrated circuit (PMIC) can indicate dropping the panel-on signal level to low. In other words, when the power management integrated circuit (PMIC) is turned off, all of the power management integrated circuit (PMIC) output pins can be high (All-H).

[0374] At step S1708, the touch microcontroller unit (TMCU) can enable (EN) the multiplexer (MUX). Here, enabling can refer to controlling the multiplexer (MUX) to perform power supply conversion. At this time, the panel-on signal level can change from low to high (HI). Sufficient conversion time is required, and this can be processed by the touch microcontroller unit (TMCU).

[0375] At step S1710, the microcontroller can identify a touch detection sensing mode. At this time, the display panel can be turned off while a touch is detected or detected.

[0376] At step S1712, the microcontroller can determine whether the touch detection intensity exceeds a threshold.

[0377] At step S1714, the microcontroller may receive a wakeup command from the host if the touch detection intensity is below a threshold. In this case, the host may wake up or receive a wakeup signal from another device, such as an input means such as a mouse or keyboard.

[0378] At step S1716, the microcontroller can send a resume signal to the host if the touch detection intensity exceeds the threshold.

[0379] At step S1718, the host may receive the resume signal and transmit a wake-up command to the touch microcontroller unit (TMCU).

[0380] At step S1720, the host sets the display voltage (VIN) to power on, and the touch microcontroller unit (TMCU) can cause the multiplexer (MUX) to perform power supply conversion.

[0381] At step S1722, both the power management integrated circuit (PMIC) and the timing controller (T-CON) can be turned on. At this time, the panel-on signal can remain high, i.e., in a high state. Therefore, as in step S1702, the display device can enter normal mode.

[0382] Hereinafter, FIGS. 18 to 22 describe a power management control method in the case where a multiplexer (MUX) does not exist outside a power management integrated circuit (PMIC). In this case, the power management integrated circuit (PMIC) may include at least one multiplexer (MUX) inside. That is, the multiplexer (MUX) may be integrated within the power management integrated circuit (PMIC).

[0383] Figures 18 and 19 are diagrams showing the seventh exemplary configuration of a display device for power management control according to the present embodiment.

[0384] FIG. 18 illustrates, for example, the configuration of a power management integrated circuit (1810) when both the display panel (DP) and the touch panel (TSP) are turned on.

[0385] Referring to FIG. 18, the display device (1800) may include a power management integrated circuit (PMIC) (1810), a timing controller (T-CON) (1820), a source readout integrated circuit (SRIC) (1830), a touch modulation circuit (TMIC) (1840), a level shifter (LS) (1850), a touch microcontroller unit (TMCU) (1860), etc.

[0386] The display voltage (VIN) or touch voltage (VTSP) can be directly input to the power management integrated circuit (PMIC) (1810). In this case, the display voltage (VIN) or touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0387] Even when the display device (1800) uses an in-cell type panel, the display voltage (VIN) and touch voltage (VTSP) can be transmitted through separate signal lines, as in the case where an on-cell or add-on type panel is used.

[0388] A power management integrated circuit (PMIC) (1810) can receive a display voltage (VIN) or a touch voltage (VTSP) and select and output all or part of the power signal.

[0389] The power management integrated circuit (PMIC) (1810) can receive an enable (EN: enable) signal through a signal line to which the display voltage (VIN) is transmitted.

[0390] The generation timing of the output signal of the power management integrated circuit (PMIC) (1810) can be determined in response to the operation timing of the display voltage (VIN).

[0391] A power management integrated circuit (PMIC) (1810) can control power delivered to a source readout integrated circuit (SRIC) (1830), a touch modulation circuit (TMIC) (1840), and a level shifter (LS) (1850).

[0392] The timing controller (T-CON) (1820) can receive voltage (VIN) through a signal line separate from the signal line through which the display voltage (VIN) is transmitted to the power management integrated circuit (PMIC) (420).

[0393] Referring to FIG. 18, the display device (1800) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 18, the display device (1800) is illustrated with two power circuits: a first power circuit (1870) and a second power circuit (1880).

[0394] Referring to FIG. 18, the first power circuit (1870) is connected to a timing controller (T-CON) (1820) and can transmit a display voltage (VIN) to the timing controller (T-CON) (1820). At this time, the timing controller (T-CON) (1820) can receive display voltages (VIN) of various signal levels from the first power circuit (1870) as needed.

[0395] The first power circuit (1870) may include, for example, a step down converter or a buck converter (BUCK) that converts the output voltage to a voltage lower than the input voltage.

[0396] The first power circuit (1870) may be composed of a set of multiple buck circuits, and may form multiple signal lines to individually control the voltage transmitted to the timing controller (T-CON) (1820).

[0397] For example, when the display voltage (VIN) transmitted to the first power circuit (1870) is 3.3 V, the first power circuit (1870) can transmit a voltage of 0.9 V to the timing controller (T-CON) (1820) through the first buck signal line, and can transmit a voltage of 1.8 V to the timing controller (T-CON) (1820) through the second buck signal line. However, the present disclosure is not limited thereto.

[0398] The first power circuit (1870) can reduce the level of the input signal and, if necessary, can be kept in an OFF state to block signal transmission.

[0399] When the display voltage (VIN) is used as an enable (EN) signal, it can control the operation of the power management integrated circuit (420) according to the transmitted display voltage (VIN). At this time, the operation control can include control of the power management integrated circuit (PMIC) (1810) for low power driving of the display device (1800).

[0400] In other words, the display voltage (VIN) can turn on (or activate) the power management integrated circuit (PMIC) (1810) and control the power control operation of the power management integrated circuit (PMIC) (1810).

[0401] Referring to Fig. 18, since the touch panel (TSP) is also activated, the touch voltage (VTSP) can also be input to the power management integrated circuit (PMIC) (1810). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0402] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (1860). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (1860), but may be transmitted to the touch microcontroller unit (TMCU) (1860) via the second power circuit (1880).

[0403] The second power circuit (1880) is connected to the touch microcontroller unit (TMCU) (1860) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (1860).

[0404] For example, the second power circuit (1880) may be identical to the first power circuit (480) of FIG. 4 described above. Alternatively, the second power circuit (1880) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0405] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (1860) is 3.3 V, the second power circuit (1880) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (1860) through the buck signal line. However, the present disclosure is not limited thereto.

[0406] Meanwhile, the power management integrated circuit (PMIC) (420) already turned on by the display voltage (VIN) can control the operation of the touch microcontroller unit (TMCU) (1860) when there is a touch input or a touch voltage (VTSP) generated thereby.

[0407] Referring to FIG. 18, in the display device (1800), the multiplexer (MUX) (410) may not be separately located outside the power management integrated circuit (PMIC) (430), but may be formed inside it. However, this is not limited thereto.

[0408] Additionally, at least one of the first power circuit (1870) and the second power circuit (1880) may be separately provided outside the power management integrated circuit (PMIC) (1810), but is not limited thereto.

[0409] Fig. 19, unlike Fig. 18, illustrates the configuration of a power management integrated circuit (1810) in a case where the display panel (DP) is off and only the touch panel (TSP) is on.

[0410] Referring to FIG. 19, the display device (1800) may include a power management integrated circuit (PMIC) (1810), a timing controller (T-CON) (1820), a source readout integrated circuit (SRIC) (1830), a touch modulation circuit (TMIC) (1840), a level shifter (LS) (1850), a touch microcontroller unit (TMCU) (1860), etc., similar to FIG. 18. Therefore, a specific description of each component refers to the above-described content, and the following description focuses on parts that are different from FIG. 18.

[0411] However, at this time, the display voltage (VIN) may not be input to the power management integrated circuit (PMIC) (1810) because the display panel (DP) is turned off. Only the touch voltage (VTSP) may be input to the power management integrated circuit (PMIC) (1810). At this time, the touch voltage (VTSP) may be transmitted from, for example, a host (not shown).

[0412] A power management integrated circuit (PMIC) (1810) can receive a touch voltage (VTSP) and select all or part of the power signal to output to the power management integrated circuit (PMIC) (1810).

[0413] Since the power management integrated circuit (PMIC) (1810) does not transmit the display voltage (VIN), it can receive the enable (EN) signal through the signal line to which the touch voltage (VTSP) is transmitted. In other words, the touch voltage (VTSP) itself can serve as the enable (EN) signal.

[0414] Accordingly, by using the touch voltage (VTSP) as an enable (EN) signal, the generation timing of the output signal of the power management integrated circuit (PMIC) (1810) can be determined in response to the operation timing of the touch voltage (VTSP).

[0415] A power management integrated circuit (PMIC) (1810) can control power delivered to a source readout integrated circuit (SRIC) (1830), a touch modulation circuit (TMIC) (1840), and a level shifter (1850).

[0416] At this time, the timing controller (T-CON) (1820) may not be supplied with the display voltage (VIN) because the first power circuit (1870) is turned off and inactive.

[0417] Referring to FIG. 19, the display device (1800) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 19, the display device (1800) is illustrated with two power circuits: a first power circuit (1870) and a second power circuit (1880).

[0418] Referring to FIG. 19, although the first power circuit (1870) is connected to the timing controller (T-CON) (430), it is in an off state, i.e., inactive, and therefore cannot transmit the display voltage (VIN) to the timing controller (T-CON) (1820).

[0419] The touch voltage (VTSP) can function as a signal for controlling the operation as well as the enable (EN) of the power management integrated circuit (PMIC) (1810). In this case, the operation control can include control of the power management integrated circuit (PMIC) (1810) for low power operation of the display device (1800).

[0420] In other words, the touch voltage (VTSP) can not only turn on (or activate) the power management integrated circuit (PMIC) (1810), but can also function as an enable signal for the operation of the power management integrated circuit (PMIC) (1810) and control the power control operation of the power management integrated circuit (PMIC) (1810).

[0421] Referring to FIG. 19, since the touch panel (TSP) is activated as described above, a touch voltage (VTSP) can be input to a power management integrated circuit (PMIC) (1810). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0422] Meanwhile, the touch voltage (VTSP) is transmitted to a power management integrated circuit (PMIC) (1810) and is used for power supply control to a source readout integrated circuit (SRIC) (1830), a touch modulation circuit (TMIC) (1840), and a level shifter (LS) (1850), and may also be directly transmitted to a touch microcontroller unit (TMCU) (1860).

[0423] If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (1860), but may be transmitted to the touch microcontroller unit (TMCU) (1860) via a second power circuit (1880).

[0424] The second power circuit (1880) is connected to the touch microcontroller unit (TMCU) (1860) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (1860).

[0425] For example, the second power circuit (1880) may be identical to the first power circuit (480) described above in FIG. 4. Alternatively, the second power circuit (1880) may be defined as an LDO (Low Drop-output) regulator, etc., as needed.

[0426] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (1860) is 3.3 V, the second power circuit (1880) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (1860) through the buck signal line. However, the present disclosure is not limited thereto.

[0427] Meanwhile, the power management integrated circuit (PMIC) (1810) already turned on by the touch voltage (VTSP) can control the operation of the touch microcontroller unit (TMCU) (1860).

[0428] Referring to FIG. 19, a multiplexer (MUX) may not be included in the display device (1800). However, in this case, the multiplexer (MUX) (not shown) may be formed within a power management integrated circuit (PMIC) (1810). However, this is not limited thereto.

[0429] Additionally, the second power circuit (1880) may be provided separately outside the power management integrated circuit (PMIC) (1810), but is not limited thereto.

[0430] Figures 20 and 21 are the eighth exemplary configuration diagrams of a display device for power management control according to the present embodiment.

[0431] FIG. 20 illustrates, for example, the configuration of a power management integrated circuit (2000) in a state where both the display panel (DP) and the touch panel (TSP) are turned on. In the above, the on state may indicate a state in which the corresponding function is activated.

[0432] Referring to FIG. 20, the display device (2000) may include a power management integrated circuit (PMIC) (2010), a timing controller (T-CON) (2020), a source readout integrated circuit (SRIC) (2030), a touch modulation circuit (TMIC) (2040), a level shifter (LS) (2050), a touch microcontroller unit (TMCU) (2060), etc.

[0433] The display voltage (VIN) or touch voltage (VTSP) can be input to a power management integrated circuit (PMIC) (2010). At this time, the display voltage (VIN) or touch voltage (VTSP) can be transmitted from, for example, a host (not shown).

[0434] Even when the display device (2000) uses an in-cell type panel, the display voltage (VIN) and touch voltage (VTSP) can be transmitted through separate signal lines, as in the case of using an on-cell or add-on type panel.

[0435] A power management integrated circuit (PMIC) (2010) can receive a display voltage (VIN) or a touch voltage (VTSP) and select and output all or part of the power signal.

[0436] The power management integrated circuit (PMIC) (2010) can receive an enable (EN) signal through a signal line to which the display voltage (VIN) is transmitted.

[0437] The generation timing of the output signal of the power management integrated circuit (PMIC) (2010) can be determined in response to the operation timing of the display voltage (VIN).

[0438] A power management integrated circuit (PMIC) (2010) can control power delivered to a timing controller (T-CON) (2020), a source readout integrated circuit (SRIC) (2030), a touch modulation circuit (TMIC) (2040), and a level shifter (2050).

[0439] That is, the timing controller (T-CON) (2020) can receive the display voltage (VIN) directly from the power management integrated circuit (PMIC) (2010) rather than from a separate signal line from the signal line through which the display voltage (VIN) is transmitted to the power management integrated circuit (PMIC) (2010).

[0440] Referring to FIG. 20, the display device (2000) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 20, the display device (2000) is illustrated with one power circuit (2070).

[0441] Referring to Fig. 20, since the touch panel (TSP) is also activated, the touch voltage (VTSP) can also be input to the power management integrated circuit (PMIC) (2010). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0442] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (2060). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (2060), but may be transmitted to the touch microcontroller unit (TMCU) (2060) via a power circuit (2070).

[0443] The power circuit (2070) is connected to the touch microcontroller unit (TMCU) (2060) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (2060).

[0444] For example, the power circuit (2070) may be identical to the first power circuit (480) described above in FIG. 4. Alternatively, the power circuit (2070) may be defined as an LDO regulator or the like, as needed.

[0445] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (2060) is 3.3 V, the power circuit (2070) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (2070) through the buck signal line. However, the present disclosure is not limited thereto.

[0446] Meanwhile, the display voltage (VIN) can also function as an enable (EN) signal to control the operation of the power management integrated circuit (PMIC) (2010). In this case, the operation control may include control of the power management integrated circuit (PMIC) (2010) for low power operation of the display device (2000).

[0447] In other words, the display voltage (VIN) can turn on (or activate) the power management integrated circuit (PMIC) (2010) and control the power control operation of the power management integrated circuit (PMIC) (2010).

[0448] Meanwhile, the power management integrated circuit (PMIC) (2010) already turned on by the display voltage (VIN) can control the operation of the touch microcontroller unit (TMCU) (2060) when there is a touch input or a touch voltage (VTSP) generated thereby.

[0449] Referring to FIG. 20, the display device (2000) may not include a MUX. However, in this case, the MUX (not shown) may be formed inside a power management integrated circuit (PMIC) (2010). However, this is not limited thereto.

[0450] Additionally, the power circuit (2070) may be provided separately outside the power management integrated circuit (PMIC) (2010), but is not limited thereto.

[0451] Fig. 21, unlike Fig. 20, illustrates the configuration of a power management integrated circuit (2010) in a case where the display panel (DP) is off and only the touch panel (TSP) is on.

[0452] Referring to FIG. 21, the display device (2000) may include a power management integrated circuit (PMIC) (2010), a timing controller (T-CON) (2020), a source readout integrated circuit (SRIC) (2030), a touch modulation circuit (TMIC) (2040), a level shifter (LS) (2050), a touch microcontroller unit (TMCU) (2060), etc., similar to FIG. 20.

[0453] However, at this time, the display voltage (VIN) may not be input to the power management integrated circuit (PMIC) (2010) even though the display panel (DP) is turned off. Therefore, only the touch voltage (VTSP) may be input to the power management integrated circuit (PMIC) (2010). At this time, the touch voltage (VTSP) may be transmitted from, for example, a host (not shown).

[0454] The power management integrated circuit (PMIC) (2010) can receive only the touch voltage (VTSP) and select and output all or part of the power signal.

[0455] Since only the touch voltage (VTSP) is transmitted to the power management integrated circuit (PMIC) (2010), the touch voltage (VTSP) itself can be used as an enable (EN) signal.

[0456] The generation timing of the output signal of the power management integrated circuit (PMIC) (2010) can be determined in response to the operation timing of the touch voltage (VTSP).

[0457] A power management integrated circuit (PMIC) (2010) can control power delivered to a source readout integrated circuit (SRIC) (2030), a touch modulation circuit (TMIC) (2040), and a level shifter (LS) (2050). Referring to FIG. 21, at this time, the power management integrated circuit (PMIC) (2010) may not deliver power to a timing controller (T-CON) (2020).

[0458] Referring to FIG. 21, the display device (2000) may further include at least one power circuit capable of supplying the received power in a variable manner. In FIG. 21, the display device (2000) is illustrated with one power circuit (2070).

[0459] As described above, in FIG. 21, since the touch panel (TSP) is in an activated state, a touch voltage (VTSP) can be input to a power management integrated circuit (PMIC) (2010). The touch voltage (VTSP) can be a touch voltage generated in response to a touch input.

[0460] Meanwhile, the touch voltage (VTSP) may be directly transmitted to the touch microcontroller unit (TMCU) (2060). If necessary, the touch voltage (VTSP) may not be directly transmitted to the touch microcontroller unit (TMCU) (2060), but may be transmitted to the touch microcontroller unit (TMCU) (2060) via a power circuit (20700).

[0461] The power circuit (2070) is connected to the touch microcontroller unit (TMCU) (2060) and can control the voltage transmitted to the touch microcontroller unit (TMCU) (2060).

[0462] The power circuit (2070) may be identical to the first power circuit (480) of FIG. 4 described above. Alternatively, the power circuit (2070) may be defined as an LDO regulator or the like, as needed.

[0463] For example, when the touch voltage (VTSP) transmitted to the touch microcontroller unit (TMCU) (2060) is 3.3 V, the power circuit (2070) can transmit a voltage of 1.8 V to the touch microcontroller unit (TMCU) (2070) through the buck signal line. However, the present disclosure is not limited thereto.

[0464] Meanwhile, the touch voltage (VTSP) can control not only the enable (EN) of the power management integrated circuit (PMIC) (2010) but also its operation. In this case, the operation control may include control of the power management integrated circuit (PMIC) (2010) for low-power operation of the display device (2000).

[0465] In other words, the touch voltage (VTSP) can turn on (or activate) the power management integrated circuit (PMIC) (2010) and control the power control operation of the power management integrated circuit (PMIC) (2010).

[0466] Meanwhile, a power management integrated circuit (PMIC) (2010) already turned on by touch voltage (VTSP) can control the operation of a touch microcontroller unit (TMCU) (2060).

[0467] Referring to FIG. 21, the display device (2000) may not include a MUX. However, in this case, the MUX may be formed inside a power management integrated circuit (PMIC) (2010). However, this is not limited thereto.

[0468] Additionally, the power circuit (2070) may be provided separately outside the power management integrated circuit (PMIC) (2010), but is not limited thereto.

[0469] In the present disclosure, the power management circuit may refer to only a power management integrated circuit (PMIC), or may refer to a circuit including the power management integrated circuit (PMIC) and a multiplexer (MUX). Meanwhile, the power management circuit in the present disclosure may also refer to a configuration illustrated in FIGS. 4 to 9, 11 to 16, and 18 to 21 in a display device.

[0470] The power management integrated circuit (PMIC) (or power management control circuit) and display device according to the present disclosure described above can be applied to various fields in which devices including a panel including a display panel (DP) and / or a touch panel (TP) belong. For example, in order to improve the power consumption efficiency of devices used in various fields such as automobiles, robots, industrial automation, eXtended Reality, and environmental monitoring, the method according to the present disclosure can be applied as is or with slight modifications that can be easily understood by those skilled in the art.

[0471] Although the present invention has been described above with reference to embodiments thereof, it will be readily understood by those skilled in the art that various modifications and changes to the present invention can be made without departing from the spirit and scope of the present invention as set forth in the claims below.

[0472] The present disclosure relates to a power management integrated circuit (or power management control circuit) and a display device, and in particular, it can be utilized in various fields using a display device including a display panel and / or a touch panel to reduce power consumption or improve efficiency, and thus has industrial applicability.

Claims

1. A multiplexer that receives a display voltage and a touch voltage and selects one of the display voltage and the touch voltage to generate an output voltage; A first power circuit that receives the display voltage and reduces the signal level to generate a driving voltage of the timing controller; A second power circuit that receives the touch voltage and reduces the signal level to generate a driving voltage of the touch microcontroller unit; and Includes a power management integrated circuit that receives and transmits the output voltage generated from the above multiplexer, The above multiplexer is enabled by the display voltage, Display device.

2. In claim 1, The above timing controller, When the driving voltage is supplied from the first power circuit, a signal for controlling the power operation of the power management integrated circuit is transmitted. Display device.

3. In claim 1, The above power management integrated circuit, When the output voltage is supplied from the multiplexer, a signal for controlling the operation of the touch microcontroller unit is transmitted. Display device.

4. In claim 3, The above power management integrated circuit, After the above output voltage is supplied, a signal for controlling the operation of the touch microcontroller unit is transmitted according to the control of the timing controller. Display device.

5. In claim 1, The above timing controller, Even when the first power circuit is disabled and does not supply the display voltage, a signal for controlling power operation is transmitted to the power management integrated circuit. Display device.

6. A multiplexer that receives a display voltage and a touch voltage and selects one of the display voltage and the touch voltage to generate an output voltage; A first power circuit that receives the display voltage and reduces the signal level to generate a driving voltage of the timing controller; A second power circuit that receives the touch voltage and reduces the signal level to generate a driving voltage of the touch microcontroller unit; and Includes a power management integrated circuit that receives and transmits the output voltage generated from the above multiplexer, The above multiplexer receives an enable signal from the touch microcontroller unit, Display device.

7. In claim 6, The above timing controller, When the driving voltage is supplied from the first power circuit, a signal for controlling the power operation of the power management integrated circuit is transmitted. Display device.

8. In claim 6, The above power management integrated circuit, When the output voltage is supplied from the multiplexer, a signal for controlling the operation of the touch microcontroller unit is transmitted. Display device.

9. In claim 8, The above power management integrated circuit, After the above output voltage is supplied, a signal for controlling the operation of the touch microcontroller unit is transmitted according to the control of the timing controller. Display device.

10. In claim 6, The above timing controller, Even when the first power circuit is disabled and does not supply the display voltage, a signal for controlling power operation is transmitted to the power management integrated circuit. Display device.

11. A multiplexer that receives a display voltage and a touch voltage and selects one of the display voltage and the touch voltage to generate an output voltage; A timing controller activated by the above display voltage; A touch microcontrol unit activated by the above touch voltage; and Includes a power management integrated circuit that receives and transmits the output voltage generated from the above multiplexer, The above multiplexer receives an enable signal from the touch microcontroller unit, Display device.

12. In claim 11, The above timing controller, Receiving the display voltage through the power management integrated circuit, Display device.

13. In claim 11, The above touch microcontroller unit, Transmitting a signal to control the operation of the above power management integrated circuit, Display device.

14. In claim 11, The above power management integrated circuit, When the output voltage is supplied from the multiplexer, a signal for controlling the operation of the touch microcontroller unit is transmitted. Display device.

15. In claim 11, Further comprising a second power circuit that receives the touch voltage and reduces the signal level to generate a driving voltage of the touch microcontroller unit. Display device.

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