CN111583868A - Terminal equipment based on display driving circuit - Google Patents
Terminal equipment based on display driving circuit Download PDFInfo
- Publication number
- CN111583868A CN111583868A CN201910120640.9A CN201910120640A CN111583868A CN 111583868 A CN111583868 A CN 111583868A CN 201910120640 A CN201910120640 A CN 201910120640A CN 111583868 A CN111583868 A CN 111583868A
- Authority
- CN
- China
- Prior art keywords
- circuit
- switch
- display panel
- display
- terminal device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application provides a terminal equipment based on display drive circuit relates to electron technical field for solve the problem that display drive circuit's partial current is released by PMIC. The terminal device includes: the display screen comprises a power supply circuit, a screen module, a switch circuit and a control circuit, wherein the screen module comprises a display panel and a display driving circuit; the display panel comprises a display panel, a power supply circuit, a switch circuit, a control circuit and a display driving circuit, wherein the switch circuit is coupled between the power supply circuit and the display panel; the control circuit is used for controlling the switch circuit to be in a disconnected state when the display panel is controlled to be in the information screen display mode so as to disconnect a path between the power supply circuit and the display panel and enable the display driving circuit to supply power to the display panel; and the control circuit is also used for controlling the switch circuit to be in a closed state when the display panel is controlled to be in a bright screen display mode, so that the power supply circuit supplies power to the display panel.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a terminal device based on a display driving circuit.
Background
An AMOLED (active-matrix organic light-emitting diode) panel is an active matrix organic light-emitting diode panel, and compared with a conventional transistor liquid crystal display (TFT LCD) panel, the AMOLED panel has the advantages of faster response speed, higher contrast ratio, wider viewing angle, and the like, and thus is called a next generation display technology, and is currently favored by most display technology developers.
Currently, an AMOLED panel has two display modes, namely a bright screen display mode and an Audible On Display (AOD) mode, where the bright screen display mode is to light the whole AMOLED panel for display, and the AOD mode is to light the whole AMOLED panel but only display in a partial area of the AMOLED panel. In the prior art, as shown in fig. 1, when the AMOLED panel is in the bright screen display mode, a Power Management Integrated Circuit (PMIC) of the AMOLED panel supplies power to the AMOLED panel, and when the AMOLED panel is in the AOD mode, a Display Driver Integrated Circuit (DDIC) of the AMOLED panel supplies power to the AMOLED panel. In fig. 1, VDD denotes a positive electrode voltage, and VSS denotes a negative electrode voltage.
However, when the AMOLED panel is in the AOD mode, a part of the current of the DDIC flows to the PMIC and is released by the PMIC, so that the driving capability of the DDIC is weak, and the AOD mode is not implemented with sufficient driving capability, and the AMOLED panel cannot normally display in the AOD mode.
Disclosure of Invention
The application provides a terminal equipment based on display drive circuit, has solved the problem that the partial current of display drive circuit is released by PMIC among the prior art.
In order to achieve the purpose, the technical scheme is as follows:
in a first aspect, a terminal device based on a display driving circuit is provided, the terminal device comprising: the display screen comprises a power supply circuit, a screen module, a switch circuit and a control circuit, wherein the screen module comprises a display panel and a display driving circuit; the display panel comprises a display panel, a power supply circuit, a switch circuit, a control circuit and a display driving circuit, wherein the switch circuit is coupled between the power supply circuit and the display panel; the control circuit is used for controlling the switch circuit to be in a disconnected state when the display panel is controlled to be in the information screen display mode so as to disconnect a path between the power supply circuit and the display panel and enable the display driving circuit to supply power to the display panel; and the control circuit is also used for controlling the switch circuit to be in a closed state when the display panel is controlled to be in a bright screen display mode, so that the power supply circuit supplies power to the display panel. Among the above-mentioned technical scheme, be in the screen display mode of breathing out at this display panel, be in the off-state through control switch circuit to the route between disconnect power supply circuit and the display panel, thereby solve the problem that display drive circuit's partial electric current is released by power supply circuit among the prior art, thereby when this display panel is in bright screen display mode or is in the screen display mode of breathing out, this terminal equipment homoenergetic is for this display panel provides required voltage, and then has improved this terminal equipment's performance and user experience.
In one possible implementation manner of the first aspect, the switch circuit includes a first input terminal, a second input terminal, a first output terminal, a second output terminal, and a control enable terminal; the switch circuit is connected with the power supply circuit through the first input end and the second input end respectively, connected with the display panel through the first output end and the second output end respectively, and connected with the control circuit through the control enabling end. In the possible implementation manner, when the display panel is in the information screen display mode, the control circuit can enable the switch circuit to be in the off state through the control enabling end, so that a path between the power supply circuit and the display panel is disconnected, and the driving capability of the display driving circuit is prevented from being influenced by a load in the power supply circuit.
In a possible implementation manner of the first aspect, the switch circuit includes a first switch sub-circuit and a second switch sub-circuit, the first switch sub-circuit is configured to turn off or turn on a positive voltage provided by the power supply circuit for the display panel, and the second switch sub-circuit is configured to turn off or turn on a negative voltage provided by the power supply circuit for the display panel. In the above possible implementation, separate control of the positive electrode voltage and the negative electrode voltage of the power supply circuit can be realized, thereby improving flexibility in controlling the positive electrode voltage and the negative electrode voltage.
In one possible implementation form of the first aspect, the first switch sub-circuit comprises a load switch. In the possible implementation manner, the stability of the positive voltage provided for the display panel can be ensured through the load switch, so that the display panel cannot generate water ripples and other phenomena during bright screen display.
In a possible implementation manner of the first aspect, the load switch is provided with a voltage input terminal, an enable terminal, a voltage output terminal, and a ground terminal, the voltage input terminal (specifically, the first input terminal of the switch circuit) is configured to receive a positive voltage provided by the power circuit, the voltage output terminal (specifically, the first output terminal of the switch circuit) is configured to provide the positive voltage to the display panel, and the enable terminal (specifically, the control enable terminal of the switch circuit) is configured to control turning off or turning on of the load switch. The above possible implementation provides a simple and efficient load switch.
In one possible implementation manner of the first aspect, the second switch sub-circuit includes a MOS transistor switch circuit. The MOS tube switching circuit provided by the possible implementation mode has the advantages of simple design, easiness in control and lower cost.
In one possible implementation manner of the first aspect, the MOS transistor switching circuit includes: an MOS tube; when the MOS tube is cut off, the MOS tube switch circuit is in the off state, and when the MOS tube is switched on, the MOS tube switch circuit is in the on state. In the above possible implementation, a simple MOS transistor switching circuit is provided.
In a possible implementation manner of the first aspect, the MOS transistor switch circuit further includes: the circuit comprises a triode, a first resistor, a second resistor and a third resistor; the drain of the MOS transistor (specifically, the second input end of the switch circuit) is configured to receive a negative voltage provided by the power circuit, the source of the MOS transistor is connected to one end of the first resistor (specifically, the second output end of the switch circuit) and is configured to provide the negative voltage to the display panel, the gate of the MOS transistor and the other end of the first resistor are both connected to the collector of the triode, the base of the triode is connected to the ground terminal through the second resistor, the emitter of the triode is connected to the two ends of the third resistor, respectively, and the emitter of the triode (specifically, the control enable end of the switch circuit) is configured to control the turn-off or turn-on of the MOS transistor, so as to control the turn-off or turn-on of the MOS transistor switch circuit. In the possible implementation mode, the provided MOS tube switching circuit is simple in design, easy to control and low in cost, and meanwhile, the passing of high cathode voltage can be guaranteed.
In a possible implementation manner of the first aspect, the MOS transistor is an NMOS transistor, and the triode is a PNP triode; or the MOS transistor is a PMOS transistor, and the triode is an NPN triode. The possible implementation mode can improve the design flexibility and diversity of the MOS tube switching circuit.
In a possible implementation manner of the first aspect, the control circuit includes a processor, a general purpose input/output GPIO interface is disposed on the processor, and the processor is connected to the enable terminal of the load switch and the emitter of the transistor in the MOS transistor switch circuit through the GPIO interface respectively. In the above possible implementation, a simple and effective way of controlling the load switch and the MOS transistor switch circuit is provided.
In one possible implementation manner of the first aspect, the display panel is an active matrix organic light emitting diode AMOLED panel. In the possible implementation manner, the bright screen display mode and the information screen display mode of the AMOLED panel can be realized, and the problem that part of current of the display driving circuit is released by the power supply circuit in the information screen display mode can be avoided, so that sufficient voltage can be provided for the AMOLED panel in the information screen display mode.
In one possible implementation of the first aspect, the AMOLED panel has a size greater than or equal to 8 inches. The possible implementation mode can realize that the AMOLED panel with the size of 8 inches or more can normally work in a screen display mode, and the cost is low.
In a second aspect, a motherboard applied to a terminal device is provided, where a connector for connecting a screen module including a display panel and a display driving circuit is disposed on the motherboard, and the motherboard may include: the display driving circuit comprises a power supply circuit, a switch circuit and a control circuit, wherein the switch circuit is coupled between the power supply circuit and the connector, the control circuit is coupled with the switch circuit, and the power supply circuit is connected with a port which is used for connecting the display driving circuit on the connector; the control circuit is used for controlling the switch circuit to be in a disconnected state when the display panel is controlled to be in the information screen display mode through the connector so as to disconnect a path between the power circuit and the display panel and enable the display driving circuit to supply power to the display panel; and the control circuit is also used for controlling the switch circuit to be in a closed state when the display panel is controlled to be in a bright screen display mode through the connector, so that the power supply circuit supplies power to the display panel.
In one possible implementation manner of the second aspect, the switch circuit includes a first input terminal, a second input terminal, a first output terminal, a second output terminal, and a control enable terminal; the switch circuit is connected with the power supply circuit through a first input end and a second input end respectively, connected with the connector through a first output end and a second output end respectively to realize the connection of the first output end and the second output end with the display panel, and connected with the control circuit through a control enabling end.
In a possible implementation manner of the second aspect, the switch circuit includes a first switch sub-circuit and a second switch sub-circuit, the first switch sub-circuit is configured to turn off or turn on a positive voltage provided by the power circuit for the display panel, and the second switch sub-circuit is configured to turn off or turn on a negative voltage provided by the power circuit for the display panel.
In one possible implementation of the second aspect, the first switch sub-circuit comprises a load switch.
In a possible implementation manner of the second aspect, the load switch is provided with a voltage input terminal, an enable terminal, a voltage output terminal, and a ground terminal, the voltage input terminal (specifically, the first input terminal of the switch circuit) is configured to receive a positive voltage provided by the power supply circuit, the voltage output terminal (specifically, the first output terminal of the switch circuit) is configured to provide the positive voltage to the display panel, and the enable terminal (specifically, the control enable terminal of the switch circuit) is configured to control turning off or turning on of the load switch.
In one possible implementation manner of the second aspect, the second switch sub-circuit includes a MOS transistor switch circuit.
In one possible implementation manner of the second aspect, the MOS transistor switch circuit includes: an MOS tube; when the MOS tube is cut off, the MOS tube switching circuit is in an off state, and when the MOS tube is switched on, the MOS tube switching circuit is in a closed state.
In a possible implementation manner of the second aspect, the MOS transistor switch circuit further includes: the circuit comprises a triode, a first resistor, a second resistor and a third resistor; the drain electrode of the NMOS transistor (specifically, the second input end of the switch circuit) is used for receiving the negative voltage provided by the power circuit, the source electrode of the MOS transistor and one end of the first resistor are connected (specifically, the second output end of the switch circuit) and are used for providing the negative voltage for the display panel, the gate electrode of the MOS transistor and the other end of the first resistor are both connected with the collector electrode of the triode, the base electrode of the triode is connected with the ground terminal through the second resistor, the emitter electrode of the triode is respectively connected with the two ends of the third resistor, and the emitter electrode of the triode (specifically, the control enabling end of the switch circuit) is used for controlling the cut-off or conduction of the MOS transistor so as to control the turn-off or the turn-on of the MOS.
In a possible implementation manner of the second aspect, the MOS transistor is an NMOS transistor, and the triode is a PNP triode; or the MOS transistor is a PMOS transistor, and the triode is an NPN triode.
In a possible implementation manner of the second aspect, the control circuit includes a processor, a general purpose input/output GPIO interface is disposed on the processor, and the processor is connected to the enable terminal of the load switch and the emitter of the transistor in the MOS transistor switch circuit through the GPIO interface.
It can be understood that, the beneficial effects that can be achieved by the motherboard applied to the terminal device provided by the second aspect or any possible implementation manner of the second aspect may refer to the beneficial effects in the corresponding terminal device provided above, and are not described herein again.
Drawings
Fig. 1 is a schematic structural diagram of a power supply device of an AMOLED panel in the prior art;
fig. 2 is a first schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a load switch according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a MOS transistor switching circuit according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram five of a terminal device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
Fig. 2 is a schematic structural diagram of a terminal device based on a display driving circuit according to an embodiment of the present application, and referring to fig. 2, the terminal device includes: the display panel comprises a power supply circuit 201, a screen module 202, a switch circuit 203 and a control circuit 204, wherein the screen module 202 comprises a display panel 2021 and a display driving circuit 2022; the switch circuit 203 is coupled between the power circuit 201 and the display panel 2021, the control circuit 204 is coupled to the switch circuit 203, and the power circuit 201 is further coupled to the display driving circuit 2022 for supplying power to the display driving circuit 2022.
The switch circuit 203 may include a first input terminal, a second input terminal, a first output terminal, a second output terminal, and a control enable terminal. Specifically, the switch circuit 203 is connected to the power supply circuit 201 through a first input terminal and a second input terminal, connected to the display panel 2021 through a first output terminal and a second output terminal, and connected to the control circuit 204 through a control enable terminal.
In addition, the display panel 2021 has two display modes of bright screen display (bright screen display mode) and information screen display (AOD), the bright screen display mode may be to light the whole display panel for display, and the AOD mode may be to display only a partial region of the display panel without lighting the whole display panel. Alternatively, the display panel 2021 may be an Active Matrix Organic Light Emitting Diode (AMOLED) panel, or other display panels having the same or similar performance as the AMOLED panel, and the description will be given by taking the display panel 2021 as the AMOLED panel 2021. In this embodiment, the control circuit 204 may be configured to control the switch circuit 203 to be in an off state when controlling the AMOLED panel 2021 to be in the touchscreen display mode, so as to disconnect the path between the power circuit 201 and the AMOLED panel 2021, and at this time, the display driving circuit 202 supplies power to the AMOLED panel 2021; the control circuit 204 can also be used to control the switch circuit 203 to be in a closed state when the AMOLED panel 2021 is controlled to be in the bright-screen display mode, and the power supply circuit 201 supplies power to the AMOLED panel 2021.
For example, the power circuit 201 may be a Power Management Integrated Circuit (PMIC), and the display driver circuit 2022 may be a Display Driver Integrated Circuit (DDIC). Specifically, when the AMOLED panel 2021 is in the bright-screen display mode, the switch circuit 203 is in a closed state, the power supply circuit 201 is connected to the AMOLED panel 2021, and the positive voltage VDD and the negative voltage VSS provided by the power supply circuit 201 can be transmitted to the AMOLED panel 2021 through the switch circuit 203, so as to provide the voltage and the current required by the AMOLED panel 2021 in the bright-screen display mode; when the AMOLED panel 2021 is in the AOD mode, the switch circuit 203 is in an off state, the power supply circuit 201 is disconnected from the AMOLED panel 2021, and the positive voltage VDD and the negative voltage VSS provided by the display driving circuit 2022 are not affected by the discharge resistance of the power supply circuit 201, but are directly transmitted to the AMOLED panel 2021, so as to provide the voltage and the current required when the AMOLED panel 2021 is in the AOD mode. In fig. 2, VDD 'represents a voltage of the positive electrode voltage VDD supplied from the power supply circuit 201 after passing through the switch circuit 203, and VSS' represents a voltage of the negative electrode voltage VSS supplied from the power supply circuit 201 after passing through the switch circuit 203.
Optionally, the AMOLED panel 2021 may be greater than or equal to 8 inches in size. When the AMOLED panel 2021 is greater than or equal to 8 inches, the voltage and the current required by the AMOLED panel 2021 in the AOD mode are both relatively large, and the switch circuit 203 disconnects the power circuit 201 from the AMOLED panel 2021, so that the positive voltage VDD and the negative voltage VSS provided by the display driving circuit 2022 can be completely transmitted to the AMOLED panel 2021, thereby avoiding the generation of leakage current and ensuring the driving capability of the display driving circuit 2022.
Therefore, according to the terminal device provided by the embodiment of the application, when the AMOLED panel 2021 is in the touch screen display mode, the switch circuit 203 is controlled to be in the off state to disconnect the path between the power circuit 201 and the AMOLED panel 2021, so that the problem that part of the current of the display driving circuit 2022 is released by the power circuit 201 in the prior art is solved, and therefore, when the AMOLED panel 2021 is in the bright screen display mode or in the touch screen display mode, the terminal device can provide the required voltage for the AMOLED panel 2021, and further the performance and the user experience of the terminal device are improved.
Further, referring to fig. 3, the switching circuit 203 includes a first switching sub-circuit 2031 and a second switching sub-circuit 2032. The first switch sub-circuit 2031 is configured to turn off or turn on the positive voltage VDD provided by the power circuit 201 to the AMOLED panel 2021, and the second switch sub-circuit 2032 is configured to turn off or turn on the negative voltage VSS provided by the power circuit 202 to the AMOLED panel 2021.
Specifically, when the AMOLED panel 2021 is in the bright display mode, the first switch sub-circuit 2031 is configured to turn on the positive voltage VDD provided by the power circuit 201 to the AMOLED panel 2021, and the second switch sub-circuit 2032 is configured to turn on the negative voltage VSS provided by the power circuit 202 to the AMOLED panel 2021, for example, both the first switch sub-circuit 2031 and the second switch sub-circuit 2032 are in a closed state; when the AMOLED panel 2021 is in the AOD mode, the first switch sub-circuit 2031 is configured to turn off the positive voltage VDD provided by the power circuit 201 to the AMOLED panel 2021, and the second switch sub-circuit 2032 is configured to turn off the negative voltage VSS provided by the power circuit 202 to the AMOLED panel 2021, for example, both the first switch sub-circuit 2031 and the second switch sub-circuit 2032 are in an off state.
Optionally, the first switch sub-circuit 2031 includes a load switch (load switch), and the load switch has a fast switching action and good stability. When the AMOLED panel 2021 is in a bright screen display, the requirement on the stability of the positive voltage VDD is high, the voltage fluctuation may cause the display of the AMOLED panel 2021 to have the phenomenon of water ripple, and the stability of the load switch is good, so that the stability of the positive voltage VDD provided for the AMOLED panel 2021 can be ensured through the load switch.
The load switch is provided with a voltage input terminal VIN (specifically, the first input terminal of the switch circuit 203), an enable terminal ON (specifically, the control enable terminal of the switch circuit 203), a voltage output terminal VOUT (specifically, the first output terminal of the switch circuit 203), and a ground terminal GND, where the voltage input terminal VIN is configured to receive an anode voltage VDD provided by the power circuit 201, the voltage output terminal VOUT is configured to output the anode voltage VDD', and the enable terminal ON is configured to control turn-off or turn-ON of the load switch.
For example, as shown in fig. 4, the load switch may be a chip-based load switch, and the chip may include four pins a1, a2, B1, and B2, where a1 is a voltage output terminal VOUT, a2 is a voltage input terminal VIN, B1 is a ground terminal GND, and B2 is an enable terminal ON. It should be noted that the chip used in the load switch may be a plurality of different types of chips, and this is not particularly limited in this embodiment of the present application.
Optionally, the second switch sub-circuit 2032 includes a MOS transistor switch circuit, and the MOS transistor switch circuit may refer to a switch circuit built based on a MOS transistor, and when the MOS transistor is turned off, the MOS transistor switch circuit is in an off state, and when the MOS transistor is turned on, the MOS transistor switch circuit is in an on state. The MOS tube switching circuit has the advantages of simple design, easy control and lower cost.
For example, as shown in fig. 5, the MOS transistor switch circuit may include: the circuit comprises an NMOS tube, a PNP triode, a first resistor R1, a second resistor R2 and a third resistor R3. The drain (drain, d) of the NMOS transistor is used for receiving the negative voltage VSS provided by the power circuit 201 (the drain of the NMOS transistor may specifically be the second input end of the switch circuit 203), the source (source, s) of the NMOS transistor is connected to one end of the first resistor R1 and is used for outputting the negative voltage VSS' (the source of the NMOS transistor may specifically be the second output end of the switch circuit 203), the gate (gate, g) of the NMOS transistor and the other end of the first resistor R1 are both connected to the collector (collector, c) of the PNP triode, the base (base, b) of the PNP triode is connected to the ground terminal through the second resistor R2, the emitters (emitter, e) of the PNP triode are respectively connected to both ends of the third resistor R3, and the emitter of the PNP triode is used for controlling the turn-on or turn-off of the MOS transistor so as to control the turn-off or turn-on of the MOS transistor switch circuit (the emitter of the PNP triode may specifically be the control enable end of the switch circuit 203). Optionally, the resistances of the first resistor R1 and the third resistor R3 are equal, for example, R1 and R3 are both equal to 100k Ω, and the resistance of the second resistor R2 may be 1k Ω.
It should be noted that the MOS transistor switch circuit shown in fig. 5 is only an example, and in practical applications, the MOS transistor switch circuit may also be a MOS transistor switch circuit with another structural form, for example, the MOS transistor switch circuit may only include one NMOS transistor or one PMOS transistor, which is not specifically limited in this embodiment of the present application.
Specifically, taking the switch circuits shown in fig. 4 and 5 as an example, the control circuit 204 may be configured to control the load switch to be in the off state and control the MOS transistor switch circuit to be in the off state when the AMOLED panel 2021 is controlled to be in the breath display mode; alternatively, the control circuit 204 may be configured to control the load switch to be in a closed state and the MOS transistor switch circuit to be in a closed state when the AMOLED panel 2021 is in the bright-screen display mode.
Illustratively, as shown in fig. 6, the control circuit 204 includes a processor 2041, a general purpose input/output GPIO interface is disposed ON the processor 2041, and the processor 2041 is connected to the enable terminal ON of the load switch and the emitter of the transistor in the MOS transistor switch circuit through the GPIO interface. The control circuit 204 may be a circuit with a processing function built up by an electronic element, or may be a circuit including a processing chip, or a circuit including a processing chip and some peripheral devices, and the processing chip included in the control circuit 204 is exemplified as the processor 2041.
Specifically, when the AMOLED panel 2021 is in the bright screen display mode, the processor 2041 controls the GPIO interface to output a high level, and at this time, the enable terminal ON of the load switch is at the high level, so that the load switch is in the closed state, the PNP transistor in the MOS transistor switch circuit is in the conductive state, and the NMOS transistor is also in the conductive state, so that the MOS transistor switch circuit is in the closed state, and thus the positive voltage VDD provided by the power supply circuit 201 can be transmitted to the AMOLED panel 2021 through the load switch, and the negative voltage VSS provided can be transmitted to the AMOLED panel 2021 through the MOS transistor switch circuit, and further, the required voltage and current can be provided for the AMOLED panel 2021 in the bright screen display mode. When the AMOLED panel 2021 is in the AOD mode, the processor 2041 controls the GPIO interface to output a low level, and at this time, the enable terminal ON of the load switch is at the low level, so that the load switch is in an off state, the PNP transistor in the MOS transistor switch circuit is in an off state, and the NMOS transistor is also in an off state, so that the MOS transistor switch circuit is in an off state, and thus the connection between the power supply circuit 201 and the AMOLED panel is disconnected, and the display driving circuit 2022 provides the AMOLED panel 2021 with the voltage and current required in the AOD mode, and can avoid the generation of leakage current, and ensure that the display driving circuit 2022 has sufficient driving capability.
Based on the description of the terminal device, an embodiment of the present application may further provide a main board, where the main board may be applied to the terminal device, and a connector for connecting a screen module including an AMOLED panel and a display driving circuit may be disposed on the main board. The main board may include: the connector includes a power circuit, a switching circuit coupleable between the power circuit and the connector, and a control circuit coupled with the switching circuit.
For example, as shown in fig. 7, the main board in the terminal device may be exemplified by the power circuit as PMIC and the display driving circuit as DDIC in fig. 7, wherein the screen module is connected to the switch circuit through the connector BTB1, and the PMIC is connected to the battery outside the main board through the connector BTB 2. Specifically, the battery supplies power (V) to the mainboard through BTB2batRepresenting the voltage of the positive electrode supplied by the battery, GND representing ground), to power the PMIC; the PMIC can output three electrical signals, wherein AVDD supplies power to a DDIC on the screen module through a connector BTB1, the PMIC is used for supplying power to the AMOLED panel when the AMOLED panel is in a bright screen display mode, VDD and VSS respectively represent a positive electrode voltage and a negative electrode voltage provided by the PMIC, and VDD 'and VSS' respectively represent a positive electrode voltage and a negative electrode voltage of the VDD and VSS through the switch circuit; the DDIC is used to supply power to the AMOLED panel when the AMOLED panel is in the AOD mode, and VDD 'and VSS' respectively represent a positive voltage and a negative voltage provided by the DDIC for the AMOLED panel. It should be noted that, the specific process of the motherboard supplying power to the screen module may refer to the related description in the terminal device, and the description of the embodiment of the present application is not repeated herein.
Fig. 8 is a schematic structural diagram of another terminal device provided in an embodiment of the present application, and referring to fig. 8, the terminal device may include other components or assemblies, etc. in addition to the components illustrated in any one of fig. 2 to fig. 6. Optionally, the terminal device may further include a memory, a processor, a sensor component, an audio circuit, a communication module, and the like, where the processor may be the same as the processor 2041 or a different processor, and fig. 8 illustrates that the processor is the same as the processor 2041. Wherein the memory is operable to store data, software programs, and modules; the system mainly comprises a storage program area and a storage data area, wherein the storage program area can store an operating system and application programs required by at least one function, such as a sound playing function, an image playing function and the like; the storage data area may store data created according to the use of the terminal device, such as audio data, image data, a phone book, and the like. In addition, the terminal device may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor is a control center of the terminal device, connects various parts of the whole device by various interfaces and lines, and executes various functions and processes data of the terminal device by running or executing software programs and/or modules stored in the memory and calling the data stored in the memory, thereby monitoring the terminal device as a whole. In some possible embodiments, the processor may include a central processing unit, a general purpose processor, a digital signal processor, a microcontroller or microprocessor, or the like. In addition, the processor may further include other hardware circuits or accelerators, such as application specific integrated circuits, field programmable gate arrays or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.
The sensor assembly includes one or more sensors for providing various aspects of status assessment for the terminal device. The sensor assembly may comprise, among other things, a light sensor, such as a CMOS or CCD image sensor, for detecting the distance of an external object from the terminal device, or be used in imaging applications, i.e. be an integral part of a camera or a video camera. Further, the sensor assembly may further include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor or a temperature sensor, and acceleration/deceleration, orientation, on/off state of the terminal device, relative positioning of the components, or temperature change of the terminal device, etc. may be detected by the sensor assembly.
The audio components may provide an audio interface between the user and the terminal device, and may include, for example, audio circuitry, a speaker, and a microphone. The audio circuit can transmit the electric signal converted from the received audio data to the loudspeaker, and the electric signal is converted into a sound signal by the loudspeaker to be output; on the other hand, the microphone converts the collected sound signal into an electrical signal, converts the electrical signal into audio data after being received by the audio circuit, and then outputs the audio data to be transmitted to, for example, another terminal device, or outputs the audio data to the processor for further processing.
Those skilled in the art will appreciate that the terminal device illustrated in fig. 7 above is not meant to be limiting and may include more or fewer components than those illustrated, or some components may be combined, or a different arrangement of components.
It should be noted that the embodiments and the drawings in the present application are only examples, and each MOS transistor in any embodiment or drawing may be an individual MOS transistor that satisfies a required start-up gain or a required conduction current, or may be a combination of MOS transistors that is combined by a plurality of MOS transistors in parallel and satisfies the required start-up gain or the required conduction current, that is, the sum of the start-up gains corresponding to each MOS transistor in the plurality of MOS transistors is greater than or equal to the required start-up gain; each resistor in the embodiment of the present application may be a resistor satisfying a required resistance value, or may be a resistor combination satisfying the required resistance value and formed by connecting a plurality of resistors in parallel or in series, that is, the resistance value corresponding to the plurality of resistors connected in series or in parallel is equal to the required resistance value.
Finally, it should be noted that: the above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A terminal device based on a display driver circuit, the terminal device comprising: the display screen comprises a power supply circuit, a screen module, a switch circuit and a control circuit, wherein the screen module comprises a display panel and a display driving circuit; wherein the switch circuit is coupled between the power circuit and the display panel, the control circuit is coupled with the switch circuit, and the power circuit is further coupled with the display driving circuit;
the control circuit is used for controlling the switch circuit to be in an off state when the display panel is controlled to be in the information screen display mode, so that a path between the power circuit and the display panel is disconnected, and the display driving circuit supplies power to the display panel;
the control circuit is further used for controlling the switch circuit to be in a closed state when the display panel is controlled to be in a bright screen display mode, so that the power supply circuit supplies power to the display panel.
2. The terminal device according to claim 1, wherein the switch circuit comprises a first switch sub-circuit and a second switch sub-circuit, the first switch sub-circuit is configured to turn off or turn on a positive voltage provided by the power circuit for the display panel, and the second switch sub-circuit is configured to turn off or turn on a negative voltage provided by the power circuit for the display panel.
3. A terminal device according to claim 2, characterized in that the first switch sub-circuit comprises a load switch.
4. The terminal device according to claim 3, wherein the load switch is provided with a voltage input terminal, an enable terminal, a voltage output terminal and a ground terminal, the voltage input terminal is configured to receive the positive voltage, the voltage output terminal is configured to provide the positive voltage to the display panel, and the enable terminal is configured to control turning off or turning on of the load switch.
5. A terminal device according to any of claims 2-4, characterised in that the second switch sub-circuit comprises a MOS transistor switch circuit.
6. The terminal device of claim 5, wherein the MOS transistor switching circuit comprises: an MOS tube; when the MOS tube is switched on, the MOS tube switch circuit is in the closed state.
7. The terminal device of claim 6, wherein the MOS transistor switching circuit further comprises: the circuit comprises a triode, a first resistor, a second resistor and a third resistor;
the drain electrode of the MOS tube is used for receiving the negative voltage, the source electrode of the MOS tube is connected with one end of the first resistor and is used for providing the negative voltage to the display panel, the grid electrode of the MOS tube is connected with the other end of the first resistor, the collector electrode of the triode is connected with the collector electrode of the triode, the base electrode of the triode is connected with the grounding end through the second resistor, the emitting electrode of the triode is connected with the two ends of the third resistor respectively, and the emitting electrode of the triode is used for controlling the cut-off or the conduction of the MOS tube so as to control the turn-off or the turn-on of the MOS tube switching circuit.
8. The terminal device according to claim 7, wherein the MOS transistor is an NMOS transistor, and the triode is a PNP triode; or the MOS tube is a PMOS tube, and the triode is an NPN triode.
9. The terminal device according to claim 7 or 8, wherein the control circuit comprises a processor, a general purpose input output GPIO interface is disposed on the processor, and the processor is connected to the enable terminal of the load switch and the emitter of the transistor in the MOS transistor switch circuit through the GPIO interface respectively.
10. The terminal device according to any one of claims 1-9, wherein the display panel is an AMOLED panel.
11. The terminal device of claim 10, wherein the AMOLED panel has a size greater than or equal to 8 inches.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120640.9A CN111583868A (en) | 2019-02-18 | 2019-02-18 | Terminal equipment based on display driving circuit |
| PCT/CN2020/074818 WO2020168949A1 (en) | 2019-02-18 | 2020-02-12 | Display driving circuit-based terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120640.9A CN111583868A (en) | 2019-02-18 | 2019-02-18 | Terminal equipment based on display driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111583868A true CN111583868A (en) | 2020-08-25 |
Family
ID=72124132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910120640.9A Pending CN111583868A (en) | 2019-02-18 | 2019-02-18 | Terminal equipment based on display driving circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111583868A (en) |
| WO (1) | WO2020168949A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933091A (en) * | 2020-08-27 | 2020-11-13 | 努比亚技术有限公司 | Electrochromic film drive circuit |
| CN112053659A (en) * | 2020-09-25 | 2020-12-08 | 京东方科技集团股份有限公司 | Display panel, power supply method thereof and display device |
| CN114495821A (en) * | 2021-11-19 | 2022-05-13 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN115001058A (en) * | 2021-12-24 | 2022-09-02 | 荣耀终端有限公司 | Electronic device, power supply method, and computer storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421772A (en) * | 2006-09-25 | 2009-04-29 | 卡西欧计算机株式会社 | Display driving apparatus and method for driving display driving apparatus, and display apparatus and method for driving display apparatus |
| CN201438362U (en) * | 2009-08-14 | 2010-04-14 | 北京京东方光电科技有限公司 | Display power supply control device and display |
| CN102376249A (en) * | 2010-08-20 | 2012-03-14 | 三星移动显示器株式会社 | Display apparatus and power supplying method performed by display apparatus |
| CN106383611A (en) * | 2016-09-27 | 2017-02-08 | 京东方科技集团股份有限公司 | Display control circuit, display control method of display control circuit, and display apparatus |
| CN206962815U (en) * | 2017-06-13 | 2018-02-02 | 维沃移动通信有限公司 | A kind of on-off circuit and mobile terminal |
| CN207367089U (en) * | 2017-11-09 | 2018-05-15 | 广州视源电子科技股份有限公司 | A kind of control circuit of main board power supply device and electric appliance |
| CN109245526A (en) * | 2018-09-21 | 2019-01-18 | 深圳市道通智能航空技术有限公司 | A kind of power supply circuit and electronic equipment |
| CN210722407U (en) * | 2019-02-18 | 2020-06-09 | 华为技术有限公司 | Terminal equipment based on display driving circuit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100805547B1 (en) * | 2006-11-14 | 2008-02-20 | 삼성에스디아이 주식회사 | Organic electro luminescence display and driving method thereof |
| KR100894606B1 (en) * | 2007-10-29 | 2009-04-24 | 삼성모바일디스플레이주식회사 | Organic lighting emitting display and supply power method thereof |
| KR101938762B1 (en) * | 2012-01-06 | 2019-01-16 | 삼성디스플레이 주식회사 | Driver IC of Display apparatus and Method for generating logic power using Driver IC |
| CN203027229U (en) * | 2013-01-15 | 2013-06-26 | 杭州爱纬斯电子有限公司 | Power switch circuit for preventing electric spark |
| CN205829243U (en) * | 2016-07-22 | 2016-12-21 | 北京联创拓值科技有限公司 | A kind of power circuit |
| US10755622B2 (en) * | 2016-08-19 | 2020-08-25 | Samsung Electronics Co., Ltd. | Display driver integrated circuit for supporting low power mode of display panel |
| CN108693457A (en) * | 2017-04-11 | 2018-10-23 | 展讯通信（上海）有限公司 | For eliminating the chip detecting method and its system that power on overshoot |
| CN107196134B (en) * | 2017-05-31 | 2024-01-23 | 珠海市魅族科技有限公司 | Cassette assembly and electronic equipment |
-
2019
- 2019-02-18 CN CN201910120640.9A patent/CN111583868A/en active Pending
-
2020
- 2020-02-12 WO PCT/CN2020/074818 patent/WO2020168949A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421772A (en) * | 2006-09-25 | 2009-04-29 | 卡西欧计算机株式会社 | Display driving apparatus and method for driving display driving apparatus, and display apparatus and method for driving display apparatus |
| CN201438362U (en) * | 2009-08-14 | 2010-04-14 | 北京京东方光电科技有限公司 | Display power supply control device and display |
| CN102376249A (en) * | 2010-08-20 | 2012-03-14 | 三星移动显示器株式会社 | Display apparatus and power supplying method performed by display apparatus |
| CN106383611A (en) * | 2016-09-27 | 2017-02-08 | 京东方科技集团股份有限公司 | Display control circuit, display control method of display control circuit, and display apparatus |
| CN206962815U (en) * | 2017-06-13 | 2018-02-02 | 维沃移动通信有限公司 | A kind of on-off circuit and mobile terminal |
| CN207367089U (en) * | 2017-11-09 | 2018-05-15 | 广州视源电子科技股份有限公司 | A kind of control circuit of main board power supply device and electric appliance |
| CN109245526A (en) * | 2018-09-21 | 2019-01-18 | 深圳市道通智能航空技术有限公司 | A kind of power supply circuit and electronic equipment |
| CN210722407U (en) * | 2019-02-18 | 2020-06-09 | 华为技术有限公司 | Terminal equipment based on display driving circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111933091A (en) * | 2020-08-27 | 2020-11-13 | 努比亚技术有限公司 | Electrochromic film drive circuit |
| CN112053659A (en) * | 2020-09-25 | 2020-12-08 | 京东方科技集团股份有限公司 | Display panel, power supply method thereof and display device |
| CN114495821A (en) * | 2021-11-19 | 2022-05-13 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN115001058A (en) * | 2021-12-24 | 2022-09-02 | 荣耀终端有限公司 | Electronic device, power supply method, and computer storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020168949A1 (en) | 2020-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111583868A (en) | Terminal equipment based on display driving circuit | |
| US7839188B2 (en) | Circuit for clearing CMOS information | |
| CN110223635B (en) | Power supply control circuit, power supply control method and display device | |
| US7949886B2 (en) | Power supply system for motherboard | |
| CN109272967B (en) | Control circuit, display device, and control method of control circuit | |
| US20120306435A1 (en) | Charging circuit with universal serial bus port | |
| US20080018174A1 (en) | Power control apparatus and method thereof | |
| US20110095615A1 (en) | Power source selection circuit and electronic device using the same | |
| US8437484B2 (en) | Switching circuit and electronic device using the same | |
| CN115331618B (en) | Drive circuit, display panel and display device | |
| CN210722407U (en) | Terminal equipment based on display driving circuit | |
| US20060197582A1 (en) | Voltage providing circuit | |
| US20050099376A1 (en) | Image sticking elimination circuit | |
| JP5963512B2 (en) | Display device | |
| US20090168283A1 (en) | Voltage control circuit | |
| US20130147541A1 (en) | Circuit for clearing data stored in complementary metal-oxide-semiconductor | |
| US20120267958A1 (en) | Current suppression circuit and electronic device employing the same | |
| US8203518B2 (en) | Display device | |
| JP2016167807A (en) | Level conversion circuit and projection apparatus | |
| US20140347063A1 (en) | Fan test device | |
| US20230032344A1 (en) | Touch display device and power supply control method | |
| KR101920282B1 (en) | Power reset device, display device and electric device having the same | |
| JP2006081369A (en) | Electronic equipment | |
| US10586484B2 (en) | Selection and output circuit, and display device | |
| CN213185869U (en) | Power failure accelerating circuit, power supply circuit, driving board card and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200825 |
|
| RJ01 | Rejection of invention patent application after publication |