CN215642667U - Display screen control circuit, intelligent networking equipment mainboard and electronic equipment - Google Patents
Display screen control circuit, intelligent networking equipment mainboard and electronic equipment Download PDFInfo
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- CN215642667U CN215642667U CN202121028270.5U CN202121028270U CN215642667U CN 215642667 U CN215642667 U CN 215642667U CN 202121028270 U CN202121028270 U CN 202121028270U CN 215642667 U CN215642667 U CN 215642667U
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Abstract
The utility model provides a display screen control circuit, an intelligent networking equipment mainboard and electronic equipment, which comprise a main control module, a display screen interface and a power supply module, wherein the main control module comprises a first controller and a second controller, and the first controller and the second controller are used for controlling and outputting corresponding display signals; the display screen interface comprises a first display screen interface and a second display screen interface, and the first controller is connected with the first display screen interface; the power supply module is connected with the main control module and comprises a first circuit and a second circuit; and when the display screen interface detects a display screen insertion signal, triggering the main control module to output the power supply control signal. The circuit of the first display screen interface and the circuit of the second display screen interface are integrated on the same circuit board, so that the hardware cost is effectively saved, and the hardware management and maintenance are facilitated.
Description
Technical Field
The utility model relates to the technical field of intelligent networking equipment, in particular to a display screen control circuit, an intelligent networking equipment mainboard and electronic equipment.
Background
An LED backlight lamp of an intelligent network equipment display screen in the market is generally in a 6-string 6-parallel (a lamp bead arrangement mode) structure, an intelligent network equipment main board is required to provide current of about 200mA for the intelligent network equipment display screen, and a corresponding data display is an LVDS (Low-Voltage Differential Signaling) interface. Besides a common 6-string 6-parallel structure, the display screen LED backlight lamp also has a 3-string 10-parallel circuit structure, an intelligent network connection equipment mainboard is required to provide the current of about 300mA for the display screen LED backlight lamp, and the corresponding data display is an MIPI (Mobile Industry Processor Interface).
Because the value (such as 200mA or 300mA) of the backlight current required to be provided is different from the data interface (such as an LVDS interface or an MIPI interface), the prior art needs to configure two different types of hardware versions for the two different display screen hardware designs, that is, needs to design two different types of single boards, which brings more troubles to design management, especially to later maintenance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a display screen control circuit, an intelligent networking equipment mainboard and electronic equipment, which are used for solving the problem of maintenance trouble caused by a plurality of single boards in the prior art and realizing the integration of the circuit design of the plurality of single boards of the display screen on one hardware circuit board.
The utility model provides a display screen control circuit, comprising:
the main control module comprises a first controller and a second controller, and the first controller and the second controller are used for controlling and outputting corresponding display signals;
the display screen interface comprises a first display screen interface and a second display screen interface, the first controller is connected with the first display screen interface, and the second controller is connected with the second display screen interface after signal conversion is carried out through a protocol conversion chip;
the power supply module is connected with the main control module and comprises a first circuit and a second circuit, the first circuit controls the second circuit to output a first current and a second current through a power supply control signal output by the main control module, and the first current and the second current are respectively and correspondingly input to the first display screen interface and the second display screen interface so as to realize power supply of the display screen interface;
and when the display screen interface detects a display screen insertion signal, triggering the main control module to output the power supply control signal.
According to the display screen control circuit, the first circuit comprises a power supply input end, a power supply output end, a power supply input filter capacitor, a backlight main power supply, an inductor, a diode, a first resistor and a power supply output filter capacitor, wherein the power supply input filter capacitor, the backlight main power supply, the inductor, the diode, the first resistor and the power supply output filter capacitor are connected between the power supply input end and the power supply output end, a voltage input pin of the backlight main power supply is connected with the power supply input end, a voltage output pin of the backlight main power supply is connected with the first resistor, and the power supply output end is respectively connected with the first display screen interface and the second display screen interface.
According to the display screen control circuit, the second circuit comprises a second resistor and an N-MOS (N-metal oxide semiconductor) tube, the second resistor is connected with the N-MOS tube in series and then connected with the first resistor in parallel, the N-MOS tube is controlled to be switched on or switched off by a power supply control signal output by the main control module, the second resistor is controlled to be switched on or switched off by the N-MOS tube, the first current is output by adjusting the first resistor, and the second current is output by adjusting the second resistor.
When the value of the first resistor of the display screen control circuit is 1 ohm, the second current input to the second display screen interface is 200 mA; and when the value of the second resistor is 1.5 ohms, the first current input to the first display screen interface is 300 mA.
According to the display screen control circuit, the first controller is a first MIPI controller, the second controller is a second MIPI controller, the first display screen interface is an MIPI display screen interface, and the second display screen interface is an LVDS display screen interface.
The utility model also provides an intelligent networking equipment mainboard, which comprises:
the main control module comprises a first controller and a second controller, and the first controller and the second controller are used for controlling and outputting corresponding display signals;
the display screen interface comprises a first display screen interface and a second display screen interface, the first display screen interface is connected with the first controller, and the second display screen interface is connected with the second controller after signal conversion is carried out through a protocol conversion chip;
the power supply module is connected with the main control module and comprises a first circuit and a second circuit, the first circuit controls the second circuit to output a first current and a second current through a power supply control signal output by the main control module, and the first current and the second current are respectively and correspondingly input to the first display screen interface and the second display screen interface so as to realize power supply of the display screen interface;
and when the display screen interface detects a display screen insertion signal, triggering the main control module to output the power supply control signal.
According to the intelligent network connection equipment mainboard, the first circuit comprises a power supply input end, a power supply output end, a power supply input filter capacitor, a backlight main power supply, an inductor, a diode and a power supply output filter capacitor, wherein the power supply input filter capacitor, the backlight main power supply, the inductor, the diode and the power supply output filter capacitor are connected between the power supply input end and the power supply output end, a voltage input pin of the backlight main power supply is connected with the power supply input end, and the power supply output end is respectively connected with the first display screen interface and the second display screen interface.
According to the intelligent networking equipment mainboard, the second circuit comprises a first resistor, a second resistor and an N-MOS (N-metal oxide semiconductor) tube, the first resistor is connected with a voltage output pin of the backlight main power supply, the second resistor is connected with the N-MOS tube in series and then connected with the first resistor in parallel, the N-MOS tube is controlled to be switched on or off by a power supply control signal output by the main control module, the second resistor is controlled to be switched on or off by the N-MOS tube, the first current is output by adjusting the first resistor, and the second current is output by adjusting the second resistor.
According to the intelligent networking equipment mainboard, the first controller is a first MIPI controller, the second controller is a second MIPI controller, the first display screen interface is an MIPI display screen interface, and the second display screen interface is an LVDS display screen interface.
The utility model also provides electronic equipment comprising the display screen control circuit.
According to the display screen control circuit, the intelligent network equipment mainboard and the electronic equipment, when the display screen insertion signal is detected through the display screen interface, the main control module is triggered to output the power supply control signal, the power supply control signal controls the first current and the second current to be output to the corresponding first display screen interface and the second display screen interface, the display signal is output to the first display screen interface through the first controller, the display signal is output to the second display screen interface through the second controller through the protocol conversion chip, the circuits of the first display screen interface and the circuits of the second display screen interface are integrated on the same circuit board, hardware cost is effectively saved, and hardware management and maintenance are facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a motherboard of an intelligent networking device provided in the prior art;
fig. 2 is a second schematic structural diagram of a motherboard of an intelligent networking device provided in the prior art;
FIG. 3 is a schematic diagram of a display control circuit according to the present invention;
fig. 4 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein.
The technical terms to which the present invention relates are described below:
a Mobile Industry Processor (MIPI) is an open standard and a specification established for a Mobile application Processor by the MIPI alliance. The method mainly standardizes the interfaces (a camera, a display screen interface, a radio frequency/baseband interface) and the like in the mobile phone, thereby reducing the complexity of the interfaces in the mobile phone and increasing the flexibility of design.
LVDS (Low-Voltage Differential Signaling, abbreviated as LVDS), i.e. Low-Voltage Differential signals, also called TIA/EIA-644, is a technical standard and also a Low-Voltage Differential signal technical interface. The digital video signal transmission mode is developed for overcoming the defects of high power consumption, high EMI electromagnetic interference and the like when broadband high-code-rate data is transmitted in a TTL level mode.
Differences between LVDS and MIP: the LVDS output interface is used for transmitting low-voltage differential signals, and the output interface is adopted, so that the signals can be transmitted on a differential PCB or a balance cable, and low noise and low power consumption are realized due to the adoption of a low-voltage and low-current driving mode. The LVDS output interface is connected with the liquid crystal display, and the LVDS interface is only used for transmitting video data. The MIPI signals are transmitted in pairs, interference is mainly reduced, the MIPI signals are routed in pairs, the two wires are in opposite phases in waveform, so that external interference is generated, most of the MIPI signals can be offset, the MIPI signals are mainly used on a flat panel and a mobile phone, and the MIPI signals can transmit video data and can transmit control instructions.
The display screen control circuit, the intelligent networking device main board and the electronic device of the utility model are described in the following with reference to fig. 1 to 4.
An LED backlight of a display screen of an intelligent internet device (such as a vehicle-mounted multimedia device, i.e., a car machine) in the market is generally in a 6-string and 6-parallel (an arrangement manner of lamp beads), a typical value of required supply current is about 200mA, a corresponding data display is an LVDS interface, and a typical circuit is shown in fig. 1.
Fig. 1 is a schematic structural diagram of a motherboard of an intelligent networking device provided in the prior art, as shown in fig. 1. The intelligent networking device mainboard 100 in the figure comprises a main control module 101, a MIPI controller 102, a protocol conversion chip 103, an LVDS display screen interface 104 and a first circuit 105.
The first circuit 105 includes a power input terminal Vin, a power output terminal Vout, a power input filter capacitor Cin connected between the power input terminal Vin and the power output terminal Vout, a backlight main power source U1, an inductor L, a diode D, a first resistor R1, and a power output filter capacitor Cout, where the inductor L is a power matching inductor, and the first resistor R1 outputs a current adjusting resistor.
Specifically, a voltage input pin IN of the backlight main power supply U1 is connected to the power input terminal Vin, a voltage output pin FB of the backlight main power supply U1 is connected to the first resistor R1, the power output terminal Vout is connected to the LVDS display interface 104, and the MIPI controller 102 is connected to the LVDS display interface 104 through the protocol conversion chip 103.
The backlight main power supply U1 is a constant current source output, the output current is fed back by a feedback reference voltage VFBAnd the first resistor R1, and the calculation formula is as follows:
wherein, VFBThe value is a fixed value, determined by the backlight main power chip U1, and is typically set to 0.2V, for example, when 200mA is required to be output, the value of the first resistor R1 may be 1 ohm. The output terminal Vout of the first circuit 105 is connected to the LVDS display interface 106 and provides a backlight power supply for the LVDS display interface 106.
For the data display channel, since the main control module 101 is an interface of the MIPI controller 102 and the display screen interface is the LVDS display screen interface 104, a protocol conversion chip 103 needs to be added in the figure, and the protocol conversion chip 103 is used for converting MIPI data into LVDS data for output. The protocol conversion chip 103 inputs the LVDS data to the LVDS display screen interface 104, and the LVDS display screen interface 104 is connected to a corresponding LVDS display screen.
Besides the common 6-string 6-parallel structure, the display screen LED backlight also has an MIPI display screen interface 106 which is provided by a manufacturer and has a 3-string 10-parallel circuit structure and corresponding data display. The problem caused to the hardware design is that the motherboard backlight power circuit needs to provide 300mA of current (it can be calculated from the above formula, only the first resistor R1 is adjusted to 0.67 ohm, and it can be adapted to the corresponding screen), and at the same time, it needs to be directly connected to the interface of the MIPI controller 102 of the main control module 101, and the circuit structure is as shown in fig. 2.
Fig. 2 is a second schematic structural diagram of a motherboard of an intelligent networking device provided in the prior art, as shown in fig. 2. The intelligent networking device mainboard 100 in the figure comprises a main control module 101, a MIPI controller 102, a MIPI display screen interface 106 and a first circuit 105. Since fig. 2 is the MIPI display interface 106, the protocol conversion chip 103 is not required to convert the display data.
To sum up, the main board of the intelligent networking device in the prior art needs to be adapted to different display screens, and generally needs to be provided with two kinds of boards (for example, two kinds of boards shown in fig. 1 and fig. 2): one is a mainboard of an LVDS display screen interface with backlight current of 200mA, and the other is a mainboard of an MIPI display screen interface with backlight current of 300 mA. Due to the difference of the required backlight current value (200mA and 300mA) and the data interface (LVDS display screen interface and MIPI display screen interface), two different types of hardware versions are required to be configured for two different display screen hardware designs, so that the problems that the two hardware versions need to be designed and maintained, and corresponding troubles are brought to hardware management and designers.
Based on the above, the utility model provides a unified hardware circuit board, which can be realized by integrating the two kinds of intelligent networking equipment mainboard design on one hardware circuit board, by circuit design and selection constraint on PCB routing and devices of the circuit board, and by integrating the MIPI display screen interface and the LVDS display screen interface on one hardware circuit board. The mainboard hardware automatically identifies the type of the external display screen (such as an MIPI display screen or an LVDS display screen) and controls the circuit to select a corresponding backlight power supply and a corresponding display channel, so that the purpose that one hardware circuit board can be adapted to different display screens and different application scenes is achieved, and meanwhile, the hardware development and maintenance cost is reduced.
Fig. 3 is a schematic structural diagram of a display screen control circuit provided by the present invention, as shown in fig. 3. A display screen control circuit 300 comprises a main control module 301, a power supply module 302 and a display screen interface 303.
The main control module 301 includes a first controller 304 and a second controller 305, where the first controller 304 and the second controller 305 are used to control output of corresponding display signals.
The display interface 303 includes a first display interface 306 and a second display interface 307. The first controller 304 is connected to the first display interface 306, and the second controller 305 performs signal conversion by the protocol conversion chip 103 and then is connected to the second display interface 307.
The power supply module 302 is connected to the main control module 301, and includes a first circuit 105 (as shown in fig. 1 and fig. 2) and a second circuit 308, where the first circuit 105 controls the second circuit 308 to output a first current and a second current through a power control signal output by the main control module 301, and the first current and the second current are respectively and correspondingly input to the first display screen interface 306 and the second display screen interface 307 to supply power to the display screen interface 303.
When the display screen interface 303 detects a display screen insertion signal, the main control module 301 is triggered to output a power control signal.
Alternatively, fig. 3 illustrates the detection of a display screen insertion signal through the second display screen interface. Since the first display screen interface 306 or the second display screen interface 307 needs to have an interface externally connected with the display screen, the utility model can also detect the input signal of the display screen through the first display screen interface.
The first circuit 105 includes a power input terminal Vin, a power output terminal Vout, a power input filter capacitor Cin connected between the power input terminal Vin and the power output terminal Vout, a backlight main power source U1, an inductor L, a diode D, a first resistor R1, and a power output filter capacitor Cout, where the inductor L is a power matching inductor, and the first resistor R1 outputs a current adjusting resistor. The voltage input pin IN of the backlight main power U1 is connected to the power input terminal Vin, the voltage output pin FB of the backlight main power U1 is connected to the first resistor R1, and the power output terminal Vout is connected to the first display interface 306 and the second display interface 307, respectively, for providing backlight power to the first display interface 306 and the second display interface 307.
The backlight main power supply U1 is a constant current source output, the output current is fed back by a feedback reference voltage VFBAnd the first resistor R1, and the calculation formula is as follows:
wherein, VFBTo be fixedThe value is determined by the backlight main power chip U1, and a typical value may be 0.2V, for example, when 200mA is required to be output, the value of the first resistor R1 may be 1 ohm.
The second circuit 308 includes a second resistor R2 and an N-MOS transistor Q1, the second resistor R2 is connected in series with the N-MOS transistor Q1 and then connected in parallel with the first resistor R1, the N-MOS transistor Q1 is controlled to be turned on or off by a power control signal output by the main control module 301, the N-MOS transistor Q1 is used to control the second resistor R2 to be turned on or off, a first current is output by adjusting the first resistor R1, and a second current is output by adjusting the second resistor R2.
Specifically, the main control module 301 controls the N-MOS transistor Q1 to be turned on or off according to the Power control signal output by the Power _ EN Power control signal line.
Optionally, the first controller 304 is a first MIPI controller, the second controller 305 is a second MIPI controller, the first display screen interface 306 is a MIPI display screen interface, and the second display screen interface 307 is a LVDS display screen interface. The first controller 304 is connected with the first display screen interface 306 through the MIPI routing, and the first display screen interface 306 is externally connected with the MIPI display screen. The second controller 305 is connected to the protocol conversion chip 103 through an MIPI trace, the protocol conversion chip 103 is connected to the second display screen interface 307 through an LVDS trace after performing signal conversion, and the second display screen interface 307 is externally connected to an LVDS display screen.
When the first current input into the interface of the MIPI display screen is 300mA, the value of the second resistor R2 is 1.5 ohms; when the second current input to the LVDS display interface is 200mA, the first resistor R1 takes a value of 1 ohm.
Specifically, the value taking process of the second resistor R2 of the second circuit 308 is as follows:
the current of the first resistor R1 is 200Ma, the resistance of the corresponding first resistor R1 is 1 ohm, and the current of the second resistor R2 of the second circuit 308 is 100 Ma. An N-MOS transistor with a small dc voltage drop needs to be selected, and typically, the voltage drop between DS is 50Mv at 100mA under the condition of the GS interpolar control voltage of 3.3V. From this, since the voltage drop is 150mV when the current 100mA passes through the second resistor R2, the value of the second resistor R2 is 1.5 ohms.
Optionally, the main control module 301 controls the current values of the first current and the second current through three signal lines, which are respectively:
the signal line LVDS _ EN is used for enabling control of the protocol conversion chip 103, and when the LVDS _ EN outputs a low level, the protocol conversion chip 103 is in a reset state and does not operate, and when the LVDS _ EN outputs a high level, the protocol conversion chip 103 operates normally.
The signal line LVDS _ DET triggers the main control module 301 to output a Power _ EN output Power enable control output signal by detecting that the LVDS display panel is inserted with a detection signal.
The signal wire Power _ EN outputs a Power enable control output signal to control the N-MOS transistor Q1 and the second resistor to output a first current (with a current value of 300mA) or a second current (with a current value of 300 mA).
The LVDS _ DET is used for indicating the insertion of the LVDS display screen, and when the LVDS display screen is inserted, the LVDS _ DET inputs a low level to the main control module 301; when the receptacle of the LVDS display is empty (i.e., no LVDS display is inserted), the LVDS _ DET inputs a high level to the main control module 301. In particular, the LVDS _ DET may be connected to a GPIO pin of the main control module 301 having a built-in pull-up resistor, and the socket may be connected to an idle ground pin of the LVDS display, so that the pin is set high by a resistor that is internally pulled up to a power supply when no display is connected, and is set low by a ground signal on the screen when the display is connected, thereby implementing a desired function.
The following describes the control principle of the display screen control current:
first, the main control module 301 obtains a detection signal of the second display screen interface 307 through the signal line LVDS _ DET.
Optionally, the signal line LVDS _ DET is used to indicate whether the second display screen interface 307 has an LVDS display screen inserted. When an LVDS display screen is inserted, the signal line LVDS _ DET inputs a low level to the main control module 301; when the receptacle of the second display interface 307 is empty, the LVDS _ DET signal line inputs a high level to the main control module 301.
According to the detection signal, the first controller 304 or the second controller 305 of the main control module 301 outputs a display signal to the corresponding first display screen interface 306 or the second display screen interface 307, and the power supply module 302 outputs a corresponding current value to the corresponding first display screen interface 306 or the second display screen interface 307.
Specifically, in a default situation, when no LVDS display is accessed, the insertion detection signal Power _ DET of the second display interface outputs a high level signal to the main control module 301. On one hand, the main control module 301 enables the protocol conversion chip 103 to set the signal line LVDS _ EN to a low level, and meanwhile, the main control module 301 outputs the display signal from the first controller 301 to the first display screen interface 306; on the other hand, the main control module 301 outputs a high level signal at the pin of the signal line Power _ EN to control the second resistor R2 to be turned on, so that the Power supply module 302 outputs 300mA to supply Power to the backlight of the first display screen interface 306.
Specifically, when the second display screen interface detects that the LVDS display screen is inserted, that is, the main control module 301 detects that the signal line Power _ DET inputs a low level signal. On the one hand, the main control module 301 enables the protocol conversion chip 103 to set the signal line LVDS _ EN to a high level, and at the same time, the main control module 301 outputs the display signal from the second controller 305, and the display signal is converted into an LVDS display signal by the protocol conversion chip 103 and sent to the second display screen interface 307; on the other hand, the main control module 301 outputs a low level signal at the pin of the signal line Power _ EN to control the second R2 to be turned off, so that the Power supply module 302 outputs 200mA to supply Power to the backlight of the second display screen interface 307.
It should be noted that, the first display interface and the second display interface are provided for interfaces of different display types, the present invention is not limited to the MIPI display interface or the LVDS display interface, and the current value controlled and output by the present invention is not limited to the 300mA current or the 200mA current, and may be specifically set according to the current value required by the actually inserted display.
It should be noted that the main control module of the present invention includes two controllers, i.e., a first controller and a second controller, and the present invention may also include only one controller according to actual needs. The main control module comprises one or two controllers which can be adapted to various application scenes, and hardware management and maintenance are facilitated.
The following describes the main board of the intelligent network connection device provided by the present invention, and the main board of the intelligent network connection device described below and the display screen control circuit described above can be referred to correspondingly.
The utility model provides an intelligent networking equipment mainboard, which comprises:
the main control module comprises a first controller and a second controller, and the first controller and the second controller are used for controlling and outputting corresponding display signals;
the display screen interface comprises a first display screen interface and a second display screen interface, the first display screen interface is connected with the first controller, and the second display screen interface is connected with the second controller after signal conversion is carried out through a protocol conversion chip;
the power supply module is connected with the main control module and comprises a first circuit and a second circuit, the first circuit controls the second circuit to output a first current and a second current through a power supply control signal output by the main control module, and the first current and the second current are respectively and correspondingly input to the first display screen interface and the second display screen interface so as to realize power supply of the display screen interface;
and when the display screen interface detects a display screen insertion signal, triggering the main control module to output the power supply control signal.
Optionally, the first circuit includes power input end, power output end and connect in power input end with power input filter capacitor, the main power supply in a poor light, inductance, diode and power output filter capacitor between the power output end, the voltage input pin of the main power supply in a poor light with power input end connects, power output end respectively with first display screen interface with the second display screen interface meets.
Optionally, the second circuit includes a first resistor, a second resistor and an N-MOS transistor, the first resistor is connected to the voltage output pin of the backlight main power supply, the second resistor is connected in parallel to the first resistor after being connected in series to the N-MOS transistor, the N-MOS transistor is controlled to be turned on or off by a power control signal output by the main control module, the second resistor is controlled to be turned on or off by the N-MOS transistor, the first current is output by adjusting the first resistor, and the second current is output by adjusting the second resistor.
The present invention also provides an electronic device, including:
the main control module comprises a first controller and a second controller, and the first controller and the second controller are used for controlling and outputting corresponding display signals;
the display screen interface comprises a first display screen interface and a second display screen interface, the first display screen interface is connected with the first controller, and the second display screen interface is connected with the second controller after signal conversion is carried out through a protocol conversion chip;
the power supply module is connected with the main control module and comprises a first circuit and a second circuit, the first circuit controls the second circuit to output a first current and a second current through a power supply control signal output by the main control module, and the first current and the second current are respectively and correspondingly input to the first display screen interface and the second display screen interface so as to realize power supply of the display screen interface;
and when the display screen interface detects a display screen insertion signal, triggering the main control module to output the power supply control signal.
Fig. 4 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 4: a processor (processor)410, a communication Interface 420, a memory (memory)430 and a communication bus 440, wherein the processor 410, the communication Interface 420 and the memory 430 are communicated with each other via the communication bus 440. The processor 410 can call the logic instructions in the memory 430 to execute the control method of the display screen control circuit, which includes:
the main control module acquires a detection signal of the second display screen interface through a detection signal line;
according to the detection signal, the main control module outputs display data to the corresponding first display screen interface or second display screen interface through the first controller or second controller, and the power supply module outputs a corresponding current value to the corresponding first display screen interface or second display screen interface.
In addition, the logic instructions in the memory 430 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method for controlling the display screen control circuit provided by the above methods, including:
the main control module acquires a detection signal of the second display screen interface through a detection signal line;
according to the detection signal, the main control module outputs display data to the corresponding first display screen interface or second display screen interface through the first controller or second controller, and the power supply module outputs a corresponding current value to the corresponding first display screen interface or second display screen interface.
In still another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program, which when executed by a processor is implemented to execute the control method of the display screen control circuit provided in each of the above aspects, including:
the main control module acquires a detection signal of the second display screen interface through a detection signal line;
according to the detection signal, the main control module outputs display data to the corresponding first display screen interface or second display screen interface through the first controller or second controller, and the power supply module outputs a corresponding current value to the corresponding first display screen interface or second display screen interface.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A display screen control circuit, comprising:
the main control module comprises a first controller and a second controller, and the first controller and the second controller are used for controlling and outputting corresponding display signals;
the display screen interface comprises a first display screen interface and a second display screen interface, the first controller is connected with the first display screen interface, and the second controller is connected with the second display screen interface after signal conversion is carried out through a protocol conversion chip;
the power supply module is connected with the main control module and comprises a first circuit and a second circuit, the first circuit controls the second circuit to output a first current and a second current through a power supply control signal output by the main control module, and the first current and the second current are respectively and correspondingly input to the first display screen interface and the second display screen interface so as to realize power supply of the display screen interface;
and when the display screen interface detects a display screen insertion signal, triggering the main control module to output the power supply control signal.
2. The display screen control circuit of claim 1, wherein the first circuit comprises a power input terminal, a power output terminal, and a power input filter capacitor, a backlight main power supply, an inductor, a diode, a first resistor, and a power output filter capacitor connected between the power input terminal and the power output terminal, wherein a voltage input pin of the backlight main power supply is connected to the power input terminal, a voltage output pin of the backlight main power supply is connected to the first resistor, and the power output terminal is respectively connected to the first display screen interface and the second display screen interface.
3. The display screen control circuit according to claim 2, wherein the second circuit includes a second resistor and an N-MOS transistor, the second resistor is connected in series with the N-MOS transistor and then connected in parallel with the first resistor, the N-MOS transistor is controlled to be turned on or off by a power control signal output by the main control module, the N-MOS transistor is controlled to be turned on or off, the first current is output by adjusting the first resistor, and the second current is output by adjusting the second resistor.
4. The display screen control circuit of claim 3, wherein when the first resistance takes on a value of 1 ohm, the second current input to the second display screen interface is 200 mA; and when the value of the second resistor is 1.5 ohms, the first current input to the first display screen interface is 300 mA.
5. The display screen control circuit of claim 1, wherein the first controller is a first MIPI controller, the second controller is a second MIPI controller, the first display screen interface is a MIPI display screen interface, and the second display screen interface is a LVDS display screen interface.
6. The utility model provides an intelligence networking equipment mainboard which characterized in that includes:
the main control module comprises a first controller and a second controller, and the first controller and the second controller are used for controlling and outputting corresponding display signals;
the display screen interface comprises a first display screen interface and a second display screen interface, the first display screen interface is connected with the first controller, and the second display screen interface is connected with the second controller after signal conversion is carried out through a protocol conversion chip;
the power supply module is connected with the main control module and comprises a first circuit and a second circuit, the first circuit controls the second circuit to output a first current and a second current through a power supply control signal output by the main control module, and the first current and the second current are respectively and correspondingly input to the first display screen interface and the second display screen interface so as to realize power supply of the display screen interface;
and when the display screen interface detects a display screen insertion signal, triggering the main control module to output the power supply control signal.
7. The motherboard of claim 6, wherein the first circuit comprises a power input terminal, a power output terminal, and a power input filter capacitor, a backlight main power supply, an inductor, a diode, and a power output filter capacitor connected between the power input terminal and the power output terminal, wherein a voltage input pin of the backlight main power supply is connected to the power input terminal, and the power output terminal is connected to the first display interface and the second display interface respectively.
8. The motherboard of claim 7, wherein the second circuit comprises a first resistor, a second resistor and an N-MOS transistor, the first resistor is connected to a voltage output pin of the backlight main power supply, the second resistor is connected in series with the N-MOS transistor and then connected in parallel with the first resistor, the N-MOS transistor is controlled to be turned on or off by a power control signal output by the main control module, the second resistor is controlled to be turned on or off by the N-MOS transistor, the first current is output by adjusting the first resistor, and the second current is output by adjusting the second resistor.
9. The motherboard of claim 6, wherein the first controller is a first MIPI controller, the second controller is a second MIPI controller, the first display interface is a MIPI display interface, and the second display interface is an LVDS display interface.
10. An electronic device characterized by comprising the display screen control circuit according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121028270.5U CN215642667U (en) | 2021-05-13 | 2021-05-13 | Display screen control circuit, intelligent networking equipment mainboard and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121028270.5U CN215642667U (en) | 2021-05-13 | 2021-05-13 | Display screen control circuit, intelligent networking equipment mainboard and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215642667U true CN215642667U (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121028270.5U Active CN215642667U (en) | 2021-05-13 | 2021-05-13 | Display screen control circuit, intelligent networking equipment mainboard and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215642667U (en) |
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2021
- 2021-05-13 CN CN202121028270.5U patent/CN215642667U/en active Active
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