CN114035702B - Touch wakeup method and device of display equipment, power supply circuit and display equipment - Google Patents
Touch wakeup method and device of display equipment, power supply circuit and display equipment Download PDFInfo
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- CN114035702B CN114035702B CN202111300051.2A CN202111300051A CN114035702B CN 114035702 B CN114035702 B CN 114035702B CN 202111300051 A CN202111300051 A CN 202111300051A CN 114035702 B CN114035702 B CN 114035702B
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- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4418—Suspend and resume; Hibernate and awake
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Abstract
The embodiment of the disclosure provides a wake-on-touch method and device of a display device, a power supply circuit and the display device. The display device comprises a host and a touch display panel, and the wake-on-touch method comprises the following steps: responding to a first operation, and enabling the touch display panel to enter a low power consumption mode in a screen-off state, wherein in the low power consumption mode, the touch scanning frequency of the touch display panel is a first preset scanning frequency, and the first preset scanning frequency is smaller than the touch scanning frequency of the touch display panel in an active mode; and when the touch operation is detected, the touch display panel sends a wake-up instruction to the host to wake up the host, and the touch display panel enters an active mode from a low-power mode. By adopting the technical scheme of the embodiment of the disclosure, the wake-on-touch of the display device can be realized.
Description
Technical Field
The disclosure relates to the technical field of display, and in particular relates to a wake-on-touch method and device of a display device, a power supply circuit and the display device.
Background
Fig. 1 is a schematic diagram of mode conversion of a touch screen in the prior art. In the prior art, as shown in fig. 1, a touch screen in a Windows system includes three modes, namely an Active mode (Active mode), an Idle mode (Idle mode) and a Sleep mode (Sleep mode). The Active mode is defined as that one or more contacts exist in the past 30s, and normal touch operation can be performed in the Active mode; the Idle mode is defined as that no touch operation occurs in the past 30s, and the touch screen can select to reduce the scanning frequency of the touch screen in the mode so as to reduce power consumption, and once the touch operation is detected, the touch screen is immediately returned to the Active mode from the Idle mode; the Sleep mode is defined as the host (e.g., NB host) sending HID I to the touch screen 2 After the "SET_POWER Sleep" command, the touch screen enters Sleep mode. In Sleep mode, the host system is not allowed to wake-on-touch, at which time the touch scan power consumption is 0. HID I transmitted by a host (e.g., NB host) when received by a touch screen 2 After the command of "SET_POWER On", the touch screen returns to the Active mode from the Sleep mode. It can be seen that in the prior art, a system with a touch screen cannot realize wake-on-touch.
Disclosure of Invention
The embodiment of the disclosure provides a wake-on-touch method and device of a display device, a power supply circuit and the display device, so as to solve or alleviate one or more technical problems in the prior art.
As a first aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a wake-on-touch method of a display device, where the display device includes a host and a touch display panel, the wake-on-touch method including:
responding to a first operation, and enabling the touch display panel to enter a low power consumption mode in a screen-off state, wherein in the low power consumption mode, the touch scanning frequency of the touch display panel is a first preset scanning frequency, and the first preset scanning frequency is smaller than the touch scanning frequency of the touch display panel in an active mode;
and when the touch operation is detected, the touch display panel sends a wake-up instruction to the host to wake up the host, and the touch display panel enters an active mode from a low-power mode.
In some possible implementations, the wake-on-touch method further includes:
in response to the second operation, the touch display panel enters an active mode from a low power mode.
In some possible implementations, before responding to the first operation, the wake-on-touch method further includes:
in response to the third operation, the Modern Standby function of the display device is turned off to prevent the touch display panel from entering the sleep mode.
In some possible implementations, the touch display panel further includes an idle mode in a bright screen state, in which a touch scan frequency of the touch display panel is a second preset scan frequency, the second preset scan frequency being less than a scan frequency of the touch display panel in an active mode.
In some possible implementations, the first preset scan frequency is less than the second preset scan frequency.
As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a wake-on-touch apparatus of a display device, the display device including a host and a touch display panel, the wake-on-touch apparatus including:
the low-power-consumption mode entering module is used for responding to a first operation, the touch display panel enters a low-power-consumption mode in a screen-off state, and in the low-power-consumption mode, the touch scanning frequency of the touch display panel is a first preset scanning frequency which is smaller than the touch scanning frequency of the touch display panel in an active mode;
and the wake-up module is used for sending a wake-up instruction to the host by the touch display panel to wake up the host under the condition that touch operation is detected, and the touch display panel enters an active mode from a low-power consumption mode.
In some possible implementations, the wake-on-touch device further includes:
and the Modern Standby closing module is used for responding to the third operation and closing the Modern Standby function of the display device so as to prevent the touch pad from entering the sleep mode.
In some possible implementations, the touch display panel includes a transparent electrode layer multiplexed into a common signal electrode of a display stage and a sensing electrode of a touch scan stage, and the power supply circuit includes:
the power supply selection module is respectively connected with the touch power supply end, the first node and the second node, the first node is connected with the display power supply end and the pull-down resistor, and the power supply selection module is configured to enable the display power supply end to be communicated with the second node under the condition that the display power supply end and the touch power supply end provide corresponding voltages, and the touch power supply end is disconnected with the second node; the power supply selection module is further configured to enable the touch power supply end to be communicated with the second node under the control of the first node under the condition that the display power supply end does not provide voltage and the touch power supply end provides voltage when the touch display panel enters a low power consumption mode in a screen-off state, and the touch scanning frequency of the touch display panel is a first preset scanning frequency under the low power consumption mode;
and the power supply module is connected with the second node and the touch display panel respectively and is configured to supply power required by touch scanning to the touch display panel based on the electric signal of the second node.
In some possible implementations, the power selection module includes:
the switch unit is connected with the touch power supply end, the first node and the third node respectively and is configured to provide the voltage of the touch power supply end for the third node under the control of the first node under the condition that the display power supply end VDD does not provide the voltage;
a first single-phase conductive unit connected to the first node and the second node, respectively, configured to allow an electric signal to flow from the first node toward the second node in a case where the display power source terminal supplies a voltage to the first node;
a second unidirectional conductive unit connected to the third node and the second node, respectively, configured to allow an electrical signal to flow from the third node toward the second node;
the other end of the pull-down resistor is connected with the pull-down power supply end and is configured to pull down the first node to the potential of the pull-down power supply end under the condition that the display power supply end does not provide voltage.
In some of the possible implementations of the present invention,
the switch unit comprises a PMOS transistor, a control end of the PMOS transistor is connected with the first node, a first pole of the PMOS transistor is connected with the touch power supply end, and a second pole of the PMOS transistor is connected with the third node;
the first unidirectional conduction unit comprises a first diode, the positive electrode of the first diode is connected with a first node, and the negative electrode of the first diode is connected with a second node;
the second unidirectional conduction unit comprises a second diode, the positive electrode of the second diode is connected with the third node, and the negative electrode of the second diode is connected with the second node.
As a third aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a display device, including a host and a touch display panel, and further including a wake-on-touch device in any embodiment of the present disclosure, and/or a power supply circuit of the touch display panel in any embodiment of the present disclosure.
According to the wake-on-touch method for the display device, the touch display panel can enter a low-power mode in a screen-off state, and in the low-power mode, the touch display panel performs touch scanning at a first preset scanning frequency, so that touch operation can be detected; under the condition that touch operation is detected, the touch display panel can send a wake-up instruction to the host to wake up the host, and the touch display panel enters an active mode from a low-power consumption mode, so that wake-on-touch of the display device is realized. In addition, in the low power consumption mode, the first preset scanning frequency is smaller than the touch scanning frequency of the touch display panel in the active mode, and compared with the active mode, the power consumption is reduced.
The power supply circuit of the touch display panel in the embodiment of the disclosure can be applied to display equipment, and when the touch display panel is in an Active or Idle mode, the display power supply terminal provides an electric signal for the second node, so as to provide a power supply required by touch scanning for the touch display panel; under the conditions that the host is in a Sleep mode and the display power supply end is powered down and cannot provide voltage, the touch power supply end can provide an electric signal for the second node, further provide power required by touch scanning for the touch display panel, and can meet the requirements of a low-power consumption mode of the touch display panel, thereby being beneficial to realizing the touch wake-up function of the display device.
The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present disclosure will become apparent by reference to the drawings and the following detailed description.
Drawings
In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not to be considered limiting of its scope.
FIG. 1 is a schematic diagram of a mode switch of a touch screen according to the prior art;
fig. 2 is a flowchart illustrating a wake-on-touch method of a display device according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram illustrating mode switching of a touch display panel in a display device according to an embodiment of the disclosure;
FIG. 4 is a block diagram illustrating a wake-on-touch device of a display device according to an embodiment of the present disclosure;
FIG. 5 is a block diagram of a wake-on-touch device according to another embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a power supply circuit of a touch display panel according to an embodiment of the disclosure;
FIG. 7 is a schematic diagram of a power supply circuit of a touch display panel according to another embodiment of the disclosure;
fig. 8 is a schematic diagram of a power supply circuit of a touch display panel according to another embodiment of the disclosure.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
The transistors used in all embodiments of the present invention may be thin film transistors or field effect transistors or other devices of the same characteristics, and the transistors used in embodiments of the present invention are mainly switching transistors according to the role in the circuit. Since the source and drain of the switching transistor used herein are symmetrical, the source and drain are interchangeable. In the embodiment of the present invention, the source (source electrode) is referred to as a first pole, the drain (drain electrode) is referred to as a second pole, or the drain may be referred to as a first pole, and the source is referred to as a second pole. In the embodiment shown in the drawings, the middle terminal of the transistor is defined as a gate (may also be called a gate electrode), the signal input terminal is defined as a source, and the signal output terminal is defined as a drain.
Fig. 2 is a flowchart illustrating a wake-on-touch method of a display device according to an embodiment of the disclosure. As shown in fig. 2, the display device may include a host and a touch display panel, and the wake-on-touch method includes:
s11: responding to a first operation, and enabling the touch display panel to enter a Low Power State (LPS) of a screen-off State, wherein in the Low Power mode, the touch scanning frequency of the touch display panel is a first preset scanning frequency which is smaller than the touch scanning frequency of the touch display panel in an Active mode;
s12: and when the touch operation is detected, the touch display panel sends a wake-up instruction to the host to wake up the host, and the touch display panel enters an active mode from a low-power mode.
For example, the first operation may be a signal to the display device that is manually touching a button on the display device. For example, by manually touching a button on the display device, the host sends a "SET_POWER LPS" command to the touch display panel, which enters a low POWER mode in response to the "SET_POWER LPS" command. For a display device that can be opened and closed, the first operation may be a box cover operation. The first operation may be various operations allowed in the art.
In the prior art, the display device is in a sleep mode, and the black screen state of the touch display panel can be understood as the "off screen state" in the text. After the touch display panel enters a screen-off state, the host enters a sleep mode.
The wake-up instruction may be an interrupt instruction or other instruction that may wake up the host.
According to the wake-on-touch method of the display device, the touch display panel can enter a low-power mode in a screen-off state, and in the low-power mode, the touch display panel performs touch scanning at a first preset scanning frequency, so that touch operation can be detected; under the condition that touch operation is detected, the touch display panel can send a wake-up instruction to the host to wake up the host, and the touch display panel enters an active mode from a low-power consumption mode, so that wake-on-touch of the display device is realized. In addition, in the low power consumption mode, the first preset scanning frequency is smaller than the touch scanning frequency of the touch display panel in the active mode, and compared with the active mode, the power consumption is reduced.
The wake-on-touch method in the embodiment of the disclosure can be applied to Windows systems.
In one embodiment, when the touch display panel enters a low power mode of a screen off state, the host enters a Sleep (Sleep) mode, so that power consumption of the display device can be reduced.
In an exemplary embodiment, after the touch display panel detects a touch operation in the sleep mode, the host sends a wake-up instruction to the host, and the host interrupts the system to wake up after detecting a burst point, and may send a "set_power ON" instruction to the touch display panel, so that the touch display panel enters the active mode from the low POWER mode.
In one embodiment, the wake-on-touch method may further include: in response to the second operation, the touch display panel enters an active mode from a low power mode. Such a display device not only supports wake-on-touch, but also allows the user to wake-up the display device through a second operation. Illustratively, the second operation may be any operation allowed in the art, for example, the second operation may be pressing any key ON the display device or operating a mouse, etc., so as to wake up the host, and the host sends "set_power ON" to the touch display panel, so that the touch display panel enters the active mode from the low POWER mode.
In one embodiment, the wake-on-touch method may further include, prior to responding to the first operation: in response to the third operation, the Modern Standby function of the display device is turned off to prevent the touch display panel from entering the sleep mode.
In the related art, the display device has a Modern Standby function, and under the Modern Standby function, the touch display panel of the display device enters a Sleep mode, so that wake-on-touch cannot be realized. In order to avoid the touch display panel from entering the Sleep mode, the Modern Standby function of the display device needs to be turned off, preventing the touch display panel from entering the Sleep mode.
In one embodiment, the touch display panel may further include an Idle (Idle) mode of a bright screen state, in which a touch scan frequency of the touch display panel is a second preset scan frequency, the second preset scan frequency being less than a scan frequency of the touch display panel in an active mode.
It should be noted that the Active mode may be positioned such that one or more contacts exist within a preset time (for example, 30 s) in the past, and it may be understood that the touch display panel is in a normal operation mode for operating the display device by touching. An Idle (Idle) mode may be positioned in which no touch operation occurs for a preset time (e.g., 30 s) in the past, and the touch display panel may reduce its touch scan frequency in order to reduce power consumption. In the Active mode and the Idle mode, the touch display panel is in a bright state, namely a bright screen state.
The first preset scanning frequency and the second preset scanning frequency can be set according to the requirement. For example, the first preset scan frequency may be less than the second preset scan frequency. Accordingly, in the low power consumption mode of the touch display panel, the touch scan power consumption of the touch display panel can be more reduced than in the idle mode.
Fig. 3 is a schematic diagram illustrating mode conversion of a touch display panel in a display device according to an embodiment of the disclosure. As shown in fig. 3, the touch display panel may include three modes of Active, idle and LPS. In the Active mode, the user can operate the display device by touching. And if the touch operation is not detected by the touch display panel within the preset time, the touch display panel is changed from the Active mode to the Idle mode. In the Idle mode, the touch display panel detects a touch operation at a second preset scanning frequency, and once the touch operation is detected, the touch display panel is converted from the Idle mode to the Active mode. After responding to the first operation, the touch display panel enters an LPS mode. In the LPS mode, a touch operation is detected or a second operation is generated, and the touch display panel enters an Active mode from the LPS mode. The second operation may send a "SET_POWER ON" instruction to the touch display panel for the host (e.g., NB host).
Fig. 4 is a block diagram of a wake-on-touch device of a display apparatus according to an embodiment of the disclosure. The embodiment of the disclosure also provides a wake-on-touch device of a display device, the display device including a host and a touch display panel, the wake-on-touch device including:
the low power consumption mode entering module 41 is configured to enter a low power consumption mode of a screen-off state in response to a first operation, where a touch scanning frequency of the touch display panel is a first preset scanning frequency, and the first preset scanning frequency is smaller than a touch scanning frequency of the touch display panel in an active mode;
and the wake-up module 42 is configured to send a wake-up instruction to the host by using the touch display panel to wake up the host when the touch operation is detected, and the touch display panel enters the active mode from the low power mode.
In one embodiment, the wake-on-touch device further comprises: and the low-power consumption exit module is used for responding to the second operation, and the touch display panel enters an active mode from the low-power consumption mode.
Fig. 5 is a block diagram of a wake-on-touch device according to another embodiment of the present disclosure. In one embodiment, the wake-on-touch device further comprises: the Modern Standby closing module 43 is configured to close the Modern Standby function of the display device in response to the third operation, so as to prevent the touch pad from entering the sleep mode.
In the LPS mode, the touch display panel is not displayed in the off state, but the touch display panel performs touch scanning at the first preset scanning frequency, so that display and touch scanning of the touch display panel are required to be separated. For an Oncell touch display panel or an external touch display panel, the display and touch scanning are separated, and wake-on-touch is easily supported on hardware.
For an excel touch display panel, a transparent electrode layer in the touch display panel is divided into a plurality of sensing units, and the transparent electrode layer is multiplexed into a common signal electrode in a display stage and a sensing electrode in a touch scanning stage in a time-sharing manner. The transparent electrode layer outputs a Vcom signal in the display stage, and serves as a sensing electrode for recognizing a touch in the touch scan stage. Therefore, with an excel touch display panel, the display and touch scan of the touch display panel are difficult to separate.
In the related art, a display device using an excel touch display panel is in a Sleep mode, and is powered by a system, but a display power supply end for providing a display power supply for the touch display panel does not output a power supply any more, and cannot supply power to the touch display panel, so that a power supply required by touch scanning cannot be generated. But in Sleep mode the voltage at the touch power supply terminal is maintained. In order to implement wake-on-touch of the display device in the above embodiments of the present disclosure, it is necessary to provide power required for touch scanning to the touch display panel to support wake-on-touch when the touch display panel enters a low power mode.
Fig. 6 is a schematic diagram of a power supply circuit of a touch display panel according to an embodiment of the disclosure. The embodiment of the disclosure provides a power supply circuit of a touch display panel, wherein the touch display panel is an excel panel, that is, the touch display panel comprises a transparent electrode layer, and the transparent electrode layer is multiplexed into a common signal electrode in a display stage and a sensing electrode in a touch scanning stage. As shown in fig. 6, the touch display panel power supply circuit includes a power supply selection module 10 and a power supply module 20.
The power supply selection module 10 is respectively connected with the touch power supply terminal VTSP, the first node N1 and the second node N2, the first node N1 is connected with the display power supply terminal VDD and the pull-down resistor R, and the power supply selection module 10 is configured to enable the display power supply terminal VDD to be communicated with the second node N2 and enable the touch power supply terminal VTSP to be disconnected from the second node N2 under the condition that the display power supply terminal VDD and the touch power supply terminal VTSP both provide corresponding voltages; the power selection module 10 is further configured to, under the control of the first node N1, cause the touch power supply terminal VTSP to communicate with the second node N2 when the touch display panel enters a low power consumption mode in which the touch power supply terminal VDD does not supply a voltage and the touch power supply terminal VTSP supplies a voltage, and in the low power consumption mode, the touch scan frequency of the touch display panel is a first preset scan frequency.
And a power supply module 20 connected to the second node N2 and the touch display panel, respectively, and configured to supply power required for touch scanning to the touch display panel based on the electrical signal of the second node N2.
In the power supply circuit of the touch display panel of the embodiment of the disclosure, under the condition that the display power supply end VDD and the touch power supply end VTSP both provide corresponding voltages, the display power supply end VDD is communicated with the second node N2, and provides an electrical signal to the second node N2 so as to provide power supply required by touch scanning for the touch display panel; in the case where the touch display panel enters the low power mode of the off state, the display power supply terminal VDD does not supply a voltage and the touch power supply terminal VTSP supplies a voltage, the touch power supply terminal VTSP communicates with the second node N2 and supplies an electrical signal to the second node N2 so as to supply a power supply required for touch scanning to the touch display panel.
The power supply circuit of the embodiment of the disclosure can be applied to a display device, and when the touch display panel is in an Active or Idle mode, the display power supply terminal VDD provides an electrical signal to the second node N2, so as to provide a power supply required by touch scanning for the touch display panel; when the host is in a Sleep mode and the touch display panel is in a low power consumption mode and the display power supply end VDD is powered down and cannot provide voltage, the touch power supply end VTSP can provide an electric signal for the second node N2 so as to provide a power supply required by touch scanning for the touch display panel, so that the requirement of the low power consumption mode of the touch display panel can be met, and the touch wake-up function of the display device can be realized.
Fig. 7 is a schematic diagram of a power supply circuit of a touch display panel according to another embodiment of the disclosure. In one embodiment, as shown in fig. 7, the power selection module 10 may include a switching unit 11, a first single-phase conduction unit 12, and a second unidirectional conduction unit 13.
The switching unit 11 may be connected to the touch power supply terminal VTSP, the first node N1, and the third node N3, respectively, and configured to supply the voltage of the touch power supply terminal VTSP to the third node N3 under the control of the first node N1 in a case where the display power supply terminal VDD does not supply the voltage;
the first unidirectional conduction unit 12 may be connected to the first node N1 and the second node N2, respectively, and configured to allow an electric signal to flow from the first node N1 toward the second node N2 in a case where the display power source terminal VDD supplies a voltage to the first node N1;
a second unidirectional conduction unit 13 connected to the third node N3 and the second node N2, respectively, configured to allow an electric signal to flow from the third node N3 toward the second node N2;
the other end of the pull-down resistor R is connected to the pull-down power supply GND for pulling down the potential of the first node N1 to the potential of the pull-down power supply GND in the case where the voltage is not supplied from the display power supply terminal VDD.
The power supply selection module 10 in the power supply circuit shown in fig. 7 not only can realize the function of the power supply selection module, but also has a simple structure and is easy to realize.
Fig. 8 is a schematic diagram of a power supply circuit of a touch display panel according to another embodiment of the disclosure. In one embodiment, as shown in fig. 8, the switching unit 11 includes a PMOS transistor Q, a control terminal of the PMOS transistor Q is connected to the first node N1, a first pole of the PMOS transistor Q is connected to the touch power supply terminal VTSP, and a second pole of the PMOS transistor Q is connected to the third node N3.
The first unidirectional conduction unit 12 may include a first diode D1, the anode of the first diode D1 is connected to the first node N1, and the cathode of the first diode D1 is connected to the second node N2. The second unidirectional conduction unit 13 includes a second diode D2, an anode of the second diode D2 is connected to the third node N3, and a cathode of the second diode D2 is connected to the second node N2.
Illustratively, the first diode D1 may include a schottky diode and the second diode D2 may include a schottky diode. The pull-down resistor R may have a resistance of 100k ohms.
It should be noted that, fig. 8 shows an exemplary structure of the switching unit 11, the first single-phase conducting unit 12, and the second unidirectional conducting unit 13, and those skilled in the art will understand that the switching unit 11, the first single-phase conducting unit 12, and the second unidirectional conducting unit 13 are not limited to the structure shown in fig. 8, as long as the functions thereof can be realized.
Illustratively, the Vgs of the PMOS transistor Q is about-0.7V and the Vth of the first diode D1 and the second diode D2 is about 0.3V. The display power terminal VDD may provide a voltage of 3.3V, and the touch power terminal VTSP may provide a voltage of 3.3V.
In the Active mode and the Idle mode, the display power supply terminal VDD and the touch power supply terminal VTSP both provide corresponding voltages, the voltage of the first node N1 is 3.3v as the voltage of the display power supply terminal VDD, the first pole and the second pole of the PMOS transistor Q are turned off, and the voltage of the touch power supply terminal VTSP cannot be provided to the second pole of the PMOS transistor. The electric signal of the first node N1 flows to the second node N2 through the first diode D1, and thus, power required for touch scanning of the touch display panel is supplied from the display power supply terminal VDD.
In the LPS mode, the touch power terminal VTSP supplies a voltage, and the display power terminal VDD does not. Under the pull-down action of the pull-down resistor R, the potential of the first node N1 is pulled down to the potential of the pull-down power supply GND, the PMOS transistor Q is turned on, that is, the first pole and the second pole of the PMOS transistor Q are turned on, the voltage of the touch power supply terminal VTSP is supplied to the third node N3, the electrical signal of the third node N3 flows from the third node N3 toward the second node N2, and thus, the power supply required for touch scanning of the touch display panel is supplied by the touch power supply terminal VTSP.
By adopting the power supply circuit of the touch display panel in the embodiment of the disclosure, for the touch display panel of the excel type, in the Active mode and the Idle mode, the power supply required by the touch scanning of the touch display panel is provided by the display power supply end VDD; in the LPS mode, power required by touch scanning of the touch display panel is provided by a touch power supply terminal VTSP, and hardware support is provided for realizing touch wakeup of the display device.
Based on the foregoing embodiments, the embodiments of the present disclosure further provide a display device, where the display device may include a host and a touch display panel, may further include a wake-on-touch device in any embodiment of the present disclosure, and/or may further include a power supply circuit of the touch display panel in any embodiment of the present disclosure.
The display device may be: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
In the description of the present specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present disclosure.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
In this disclosure, unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
The above disclosure provides many different embodiments or examples for implementing different structures of the disclosure. The components and arrangements of specific examples are described above in order to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present disclosure. Furthermore, the present disclosure may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.
The above is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think of various changes or substitutions within the technical scope of the disclosure, which should be covered in the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (11)
1. A power supply circuit of a touch display panel, the touch display panel including a transparent electrode layer multiplexed into a common signal electrode of a display stage and a sensing electrode of a touch scan stage, the power supply circuit comprising:
the power supply selection module is respectively connected with a touch power supply end, a first node and a second node, the first node is connected with a display power supply end and a pull-down resistor, and the power supply selection module is configured to enable the display power supply end to be communicated with the second node under the condition that corresponding voltages are provided by the display power supply end and the touch power supply end, and the touch power supply end is disconnected from the second node; the power supply selection module is further configured to enable the touch power supply terminal to be communicated with the second node under the control of the first node when the touch display panel enters a low power consumption mode in a screen-off state, the display power supply terminal does not provide voltage, and the touch power supply terminal provides voltage, and in the low power consumption mode, the touch scanning frequency of the touch display panel is a first preset scanning frequency;
and the power supply module is respectively connected with the second node and the touch display panel and is configured to supply power required by touch scanning to the touch display panel based on the electric signal of the second node.
2. The power supply circuit of claim 1, wherein the power supply selection module comprises:
a switching unit connected to the touch power source terminal, the first node, and the third node, respectively, and configured to supply a voltage of the touch power source terminal to the third node under control of the first node in a case where the display power source terminal VDD does not supply the voltage;
a first unidirectional conduction unit connected to the first node and the second node, respectively, and configured to allow an electric signal to flow from the first node toward the second node in a case where the display power source terminal supplies a voltage to the first node;
a second unidirectional conduction unit connected to the third node and the second node, respectively, configured to allow an electrical signal to flow from the third node toward the second node;
the other end of the pull-down resistor is connected with a pull-down power supply end and is configured to pull down the first node to the potential of the pull-down power supply end under the condition that the display power supply end does not provide voltage.
3. The power supply circuit of claim 2, wherein,
the switch unit comprises a PMOS transistor, the control end of the PMOS transistor is connected with the first node, the first pole of the PMOS transistor is connected with the touch power supply end, and the second pole of the PMOS transistor is connected with the third node;
the first unidirectional conduction unit comprises a first diode, the positive electrode of the first diode is connected with the first node, and the negative electrode of the first diode is connected with the second node;
the second unidirectional conduction unit comprises a second diode, the positive electrode of the second diode is connected with the third node, and the negative electrode of the second diode is connected with the second node.
4. A wake-on-touch method of a display device, the display device comprising a host and a touch display panel, the touch display panel comprising the power supply circuit of any of claims 1-3, the wake-on-touch method comprising:
responding to a first operation, enabling the touch display panel to enter a low power consumption mode in a screen-off state, wherein in the low power consumption mode, the touch scanning frequency of the touch display panel is a first preset scanning frequency, and the first preset scanning frequency is smaller than the touch scanning frequency of the touch display panel in an active mode;
and under the condition that touch operation is detected, the touch display panel sends a wake-up instruction to the host to wake up the host, and the touch display panel enters the active mode from the low-power consumption mode.
5. The wake-on-touch method of claim 4, further comprising:
in response to a second operation, the touch display panel enters the active mode from the low power mode.
6. The wake-on-touch method of claim 4, wherein prior to the responding to the first operation, the wake-on-touch method further comprises:
and in response to a third operation, closing a Modern Standby function of the display device to prevent the touch display panel from entering a sleep mode.
7. The wake-on-touch method of claim 4, wherein the touch display panel further comprises an idle mode in a bright screen state, wherein in the idle mode, a touch scan frequency of the touch display panel is a second preset scan frequency, and wherein the second preset scan frequency is less than a scan frequency of the touch display panel in an active mode.
8. The wake-on-touch method of claim 7, wherein the first preset scan frequency is less than the second preset scan frequency.
9. A wake-on-touch device of a display apparatus, characterized in that the display apparatus comprises a host and a touch display panel, the touch display panel comprising the power supply circuit of any of claims 1-3, the wake-on-touch device comprising:
the low-power-consumption mode entering module is used for responding to a first operation, the touch display panel enters a low-power-consumption mode in a screen-off state, and in the low-power-consumption mode, the touch scanning frequency of the touch display panel is a first preset scanning frequency which is smaller than the touch scanning frequency of the touch display panel in an active mode;
and the wake-up module is used for sending a wake-up instruction to the host by the touch display panel under the condition that touch operation is detected so as to wake up the host, and the touch display panel enters the active mode from the low-power consumption mode.
10. The wake-on-touch device of claim 9, further comprising:
and the Modern Standby closing module is used for responding to a third operation and closing the Modern Standby function of the display device so as to prevent the touch display panel from entering a sleep mode.
11. A display device comprising a host and a touch display panel, further comprising a wake-on-touch device as claimed in claim 9 or 10, and/or a power supply circuit of the touch display panel as claimed in any one of claims 1-3.
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| CN116339531B (en) * | 2022-10-11 | 2024-04-12 | 荣耀终端有限公司 | Touch control system control method and electronic equipment |
| CN117991877A (en) * | 2022-10-31 | 2024-05-07 | Oppo广东移动通信有限公司 | Power supply method, electronic equipment and chip |
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