CN210297900U - Multifunctional signal expansion conversion circuit and display device with screen splitting function - Google Patents
Multifunctional signal expansion conversion circuit and display device with screen splitting function Download PDFInfo
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Abstract
A multi-functional signal expands converting circuit and has display device of split screen function, multi-functional signal expands converting circuit includes: the device comprises a first video transmission module, a signal conversion module, a Type-C interface module and a power conversion module; when the first video transmission module detects that the HDMI is accessed, the first identity identification signal output by the HDMI is output to the mobile terminal through the signal conversion module and the Type-C interface module in sequence; the Type-C interface module receives a first video signal output by the mobile terminal according to the first identity identification signal; the signal conversion module decodes the first video signal to obtain an HDMI video signal; the first video transmission module outputs the HDMI video signal to the HDMI interface; and the Type-C interface module can be accessed to a first power supply signal matched with the power supply requirement of the signal conversion module so as to realize the PD power supply function of the multifunctional signal expansion conversion circuit.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit, especially, relate to a multi-functional signal extension converting circuit and have display device who divides the screen function.
Background
With the rapid development of electronic technology, the functions and types of electronic products become more and more complex and diversified, and since each type of electronic product has a specific function, a technician needs to adopt a corresponding type of driving signal to control the working state of the corresponding electronic device, and in order to meet the driving requirements of various types of electronic devices, the conventional technology needs to design a specific circuit structure for the electronic product; taking a display device as an example, an HDMI (High Definition multimedia interface) signal can be recognized by the display device, and when the display device is applied to various different industrial technical fields, then the conventional technology needs to design a specific conversion circuit according to the type of a signal source, the operation steps are complex, the design cost of the conversion circuit is High, and the conventional conversion circuit can only be applied to the specific industrial technical field, so that the compatibility is low, and the video display quality of the display device is reduced.
On the other hand, since the display device in the conventional technology has complex electronic components inside, the display device needs to access electric energy with a specific amplitude to maintain a safe working state, so a technician must adopt a specific power switching device to convert an external power into a specific power, and set a specific power input end on the display device to access rated electric energy, which leads to a more complex circuit structure of the display device, increases the power supply cost of the display device, and brings great inconvenience to the use of the technician; therefore, the display device in the conventional art cannot implement a PD (Power Delivery) Power supply function.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a multi-functional signal extension converting circuit and have display device of split screen function aims at solving among the traditional technical scheme that video display equipment can't convert various types of signal sources into the HDMI signal, and is compatible lower to video display equipment can't realize PD power supply function, leads to the too loaded down with trivial details problem of traditional video display equipment's signal conversion process.
The utility model provides a first aspect of the embodiment provides a multi-functional signal extension converting circuit, include: the device comprises a first video transmission module, a signal conversion module, a Type-C interface module and a power conversion module;
the first video transmission module is connected with the signal conversion module, the Type-C interface module is connected with the signal conversion module, and the power conversion module is connected with the Type-C interface module and the signal conversion module;
the first video transmission module is used for detecting whether an HDMI (high-definition multimedia interface) is accessed, and receiving a first identity identification signal output by the HDMI when the HDMI is accessed;
the signal conversion module is used for transmitting the first identity identification signal;
the Type-C interface module is used for uploading the first identity identification signal to the mobile terminal and receiving a first video signal output by the mobile terminal according to the first identity identification signal;
the signal conversion module is also used for decoding the first video signal to obtain an HDMI video signal;
the first video transmission module is also used for outputting the HDMI video signal to the HDMI interface;
the Type-C interface module is also used for detecting whether a PD power adapter is accessed, and receiving a power supply signal sent by the PD power adapter when the PD power adapter is accessed;
the power supply conversion module is used for receiving a power demand signal output by the signal conversion module according to the power supply signal and uploading the power demand signal to the PD power adapter through the Type-C interface module;
the Type-C interface module is also used for receiving a first power supply signal output by the PD power adapter according to the power demand signal;
the power conversion module is further configured to output the first power signal to the signal conversion module.
In one embodiment, the method further comprises: a second video transmission module; the second video transmission module is connected with the signal conversion module;
the second video transmission module is used for detecting whether an MINI DP interface is accessed, and receiving a second identity signal output by the MINI DP interface when the MINI DP interface is accessed;
the signal conversion module is used for transmitting the second identity identification signal;
the Type-C interface module is used for uploading the second identity signal to the mobile terminal and receiving a second video signal output by the mobile terminal according to the second identity signal;
the signal conversion module is further used for decoding the second video signal to obtain an MINI DP video signal;
the second video transmission module is further configured to output the MINI DP video signal to the MINI DP interface.
In one embodiment, the power conversion module includes: the power supply conversion unit and the energy storage unit; the power supply conversion unit is connected with the Type-C interface module, and the energy storage unit is connected with the power supply conversion unit and the signal conversion module;
the energy storage unit is used for receiving and storing the output power demand signal of the signal conversion module;
the power supply conversion unit is used for reading a power demand signal stored by the energy storage unit and outputting the power demand signal to the Type-C interface module when receiving the power supply signal;
the energy storage unit is further used for receiving and storing a first power supply signal output by the power supply conversion unit, converting the first power supply signal into a second power supply signal and outputting the second power supply signal to the Type-C interface module.
In one embodiment, the power conversion unit includes:
the charging control chip comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor;
the first end of the first capacitor, the first end of the second capacitor, the first end of the third capacitor and the first end of the fourth capacitor are connected to a first voltage stabilization control pin of the charging control chip in common;
the second end of the first capacitor, the second end of the second capacitor, the second end of the third capacitor and the second end of the fourth capacitor are connected to the ground in common;
the first end of the fifth capacitor, the first end of the sixth capacitor and the first end of the seventh capacitor are connected to a second voltage stabilization control pin of the charging control chip in common, and the second end of the fifth capacitor, the second end of the sixth capacitor and the second end of the seventh capacitor are connected to the ground in common;
a power signal input pin of the charging control chip is connected with the Type-C interface module;
and a power signal output pin of the charging control chip is connected with the energy storage unit.
In one embodiment, the first video transmission module comprises: the HDMI conversion circuit comprises an HDMI conversion chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and at least one damping diode;
each differential signal output pin of the HDMI conversion chip is connected with the HDMI interface through the damping diode;
the signal output pin of the HDMI conversion chip is connected with the signal conversion module;
the state detection pin of the HDMI conversion chip and the first end of the first resistor are connected together to form a state detection end of the first video transmission module, and the state detection end of the first video transmission module is used for detecting whether the HDMI interface is connected or not;
the first end of the second resistor and the first end of the fifth resistor are connected to a first serial communication pin of the HDMI conversion chip in common, the first end of the third resistor and the first end of the fourth resistor are connected to a second serial communication pin of the HDMI conversion chip in common, and the second end of the second resistor and the second end of the third resistor are connected to a first direct-current power supply in common;
the first end of the sixth resistor and the first end of the seventh resistor are connected to a second direct-current power supply in common;
the second end of the fourth resistor, the second end of the fifth resistor, the second end of the sixth resistor and the second end of the seventh resistor are serial communication ends of the first video transmission module, and the serial communication end of the first video transmission module is connected with the HDMI interface.
In one embodiment, the second video transmission module comprises:
the DP conversion chip, the eighth resistor, the ninth resistor, the eighth capacitor and at least one ninth capacitor;
the state detection pin of the DP conversion chip is used for detecting whether the MINI DP interface is accessed;
the state information input pin of the DP conversion chip is connected with the MINI DP interface through the eighth capacitor;
each video signal output pin of the DP conversion chip is connected with the MINIDP interface through a ninth capacitor;
the first serial communication pin of the DP conversion chip, the second serial communication pin of the DP conversion chip, the first end of the eighth resistor, and the first end of the ninth resistor are the second video transmission module serial communication end, and the second video transmission module serial communication end is connected to the signal conversion module;
and the second end of the eighth resistor and the second end of the ninth resistor are connected to a third direct current power supply in common.
In one embodiment, the Typc-C interface module comprises:
the circuit comprises a Typc-C conversion chip, a first switching tube, a tenth resistor and an eleventh resistor;
a video signal input pin of the Typc-C conversion chip is connected with the HDMI;
the video signal output pin of the Typc-C conversion chip is connected with the signal conversion module;
a power supply signal input pin of the Typc-C conversion chip is used for being connected into the PD power adapter;
a power signal output pin of the Typc-C conversion chip is connected with the power conversion module;
the grounding pin of the Typc-C conversion chip is grounded;
the first end of the tenth resistor is connected with a power supply enabling pin of the Typc-C conversion chip, the second end of the tenth resistor is connected with the first conducting end of the first switch tube, the second conducting end of the first switch tube is grounded, the control end of the first switch tube and the first end of the eleventh resistor are connected with a power supply enabling signal in common, and the second end of the eleventh resistor is grounded.
In one embodiment, the mobile terminal includes at least one of a cell phone and a tablet computer.
The utility model provides a second aspect provides a display device with split screen function, include:
the multifunctional signal expansion conversion circuit as described above; and
each display screen is connected with the multifunctional signal expansion conversion circuit, and the display screens are accessed to perform video display according to the HDMI video signals and/or the MINI DP video signals.
In one embodiment, at least two of the display screens comprise:
the first display screen is connected with the multifunctional signal expansion conversion circuit, and is accessed to perform video display according to the HDMI video signal; and
and the second display screen is connected with the multifunctional signal expansion and conversion circuit, and is accessed to perform video display according to the MINI DP video signal.
The multifunctional signal expansion conversion circuit can be compatible with various types of signal sources through the Type-C interface module, and further the multifunctional signal expansion conversion circuit can be suitable for various industrial technical fields; when the first video transmission module is connected with the HDMI, the video playing requirement of the HDMI is output to the mobile terminal through the multifunctional signal expansion conversion circuit, so that the mobile terminal performs corresponding signal control response, the mobile terminal generates a video signal matched with the video playing requirement of the HDMI, the HDMI video signal can be output to the HDMI after the video signal is decoded by the signal conversion module, and the conversion efficiency and the application range of the multifunctional signal expansion conversion circuit to the video information output by the mobile terminal are guaranteed; the power conversion module can convert external electric energy into a first power signal meeting the power requirement of the signal transmission module so as to realize the power-on function of the PD; consequently the embodiment of the utility model provides an in multi-functional signal extension converting circuit can convert the signal source among each industrial technology field into HDMI video signal, and the compatibility is extremely strong, has reduced the signal conversion cost to carry out the self-adaptation conversion to the electric energy of PD power adapter output, with ensured multi-functional signal extension converting circuit's power supply efficiency, brought very big convenience for technical staff's use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a multifunctional signal expansion and conversion circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a multifunctional signal expansion and conversion circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power conversion module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a power conversion unit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a first video transmission module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a second video transmission module according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a Typc-C interface module according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display device with a split screen function according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device with a split screen function according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the multifunctional signal expansion and conversion circuit 10 according to an embodiment of the present invention has a schematic structural diagram, the multifunctional signal expansion and conversion circuit 10 can not only convert various signal sources into HDMI video signals, but also access rated electric energy to realize PD power supply function, the multifunctional signal expansion and conversion circuit 10 has high compatibility and signal conversion function with complete functions, and the application range is wide; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:
the above-mentioned multi-functional signal expansion converting circuit 10 includes: the video transmission system comprises a first video transmission module 101, a signal conversion module 102, a Type-C interface module 103 and a power conversion module 104.
The first video transmission module 101 is connected with the signal conversion module 102, the Type-C interface module 103 is connected with the signal conversion module 102, and the power conversion module 104 is connected with the Type-C interface module 103 and the signal conversion module 102; therefore, the multifunctional signal expansion converting circuit 10 in this embodiment has a relatively integrated circuit module structure, and each circuit module in the multifunctional signal expansion converting circuit 10 can implement compatible transmission and conversion functions for signals.
The first video transmission module 101 is configured to detect whether the HDMI interface 20 is accessed, and receive a first identity signal output by the HDMI interface 20 when the HDMI interface 20 is accessed.
The HDMI stores and transmits HDMI video information, and the physical connection state of the HDMI 20 and the multifunctional signal expansion and conversion circuit 10 can be monitored in real time through the first video transmission module 101; for example, when the first video transmission module 101 is connected to the HDMI interface 20, it indicates that an information interaction function can be implemented between the first video transmission module 101 and the HDMI interface 20; when the first video transmission module 101 does not access the HDMI interface 20, it indicates that the signal transmission between the first video transmission module 101 and the HDMI interface 20 is interrupted.
The signal conversion module 102 is configured to transmit a first identity signal.
The first identity identification signal includes performance parameters of the HDMI interface 20, for example, the first identity identification signal includes a resolution and an image format of the HDMI interface 20, and thus a video signal playing requirement of the HDMI interface 20 can be accurately obtained through the first identity identification signal; the present embodiment can compatibly transmit the first identity signal through the signal conversion module 102, so that the multifunctional signal extension conversion circuit 10 can make a fast signal conversion response to the video playing requirement of the HDMI interface 20.
The Type-C interface module 103 is configured to upload the first identity signal to the mobile terminal 30, and receive a first video signal output by the mobile terminal 30 according to the first identity signal.
The Type-C interface module 103 is connected with the mobile terminal 30, and then the Type-C interface module 103 and the mobile terminal 30 can realize a compatible information interaction function; when the mobile terminal 30 receives the first identity signal, the mobile terminal 30 generates a corresponding first video signal according to the video playing requirement of the HDMI interface 20, where the first video signal not only contains large-capacity video data, but also the parameters of the first video signal completely conform to the performance parameters of the HDMI interface 20, so that the HDMI interface 20 can receive complete video data, and the signal conversion quality and compatibility of the multifunctional signal expansion and conversion circuit 10 are improved.
The signal conversion module 102 is configured to decode the first video signal to obtain an HDMI video signal.
The signal conversion module 102 performs decoding operation on the first video signal to identify video data in the first video signal, and performs format conversion on the first video signal to obtain a corresponding HDMI video signal; the HDMI video signal can completely meet the video playing format requirement of the HDMI interface 20, so the signal conversion module 102 in this embodiment has a high-precision signal conversion function, converts the video output by the mobile terminal 20 into a specific HDMI video signal, and improves the video signal conversion efficiency and compatibility of the multifunctional signal expansion and conversion circuit 10.
The first video transmission module 101 outputs the HDMI video signal to the HDMI interface 20.
The HDMI interface 20 can receive and identify video information in the HDMI video signal, and then the first video transmission module 101 can output the converted HDMI video signal to the HDMI interface 20, so that large power loss of the HDMI video signal in the transmission process is avoided; the HDMI interface 20 is capable of receiving complete audio information and video information.
The Type-C interface module 103 is further configured to detect whether the PD power adapter 40 is connected, and receive a power supply signal sent by the PD power adapter 40 when the PD power adapter 40 is connected.
Specifically, when the Type-C interface module 103 is not connected to the PD power adapter 40, the power supply signal sent by the PD power adapter 40 cannot be received, and the Type-C interface module 103 is in a power supply interruption state.
The PD power adapter 40 stores various types of electric energy, and outputs voltage/current at different gears according to actual requirements to meet the power supply requirements of electronic components, and the PD power adapter 40 can output various types of electric energy in real time; specifically, when the Type-C interface module 103 is connected to the PD power adapter 40, the Type-C interface module 103 is electrically connected to the PD power adapter 40, and at this time, the Type-C interface module 103 is connected to the power supply signal, and the multifunctional signal expansion conversion circuit 10 can be notified to enter a charging state through the power supply signal, so that the charging efficiency and the power transmission precision of the multifunctional signal expansion conversion circuit 10 are improved.
The power conversion module 104 is configured to receive the power demand signal from the signal conversion module 102 according to the power supply signal, and upload the power demand signal to the PD power adapter 40 through the Type-C interface module 103.
The signal conversion module 102 can be driven to enter a charging state by the power supply signal, and then the signal conversion module 102 generates a power demand signal according to the charging requirement of the multifunctional signal expansion conversion circuit 10, where the power demand signal includes charging parameters of each circuit module in the multifunctional signal expansion conversion circuit 10, for example, the power demand signal includes charging power of the multifunctional signal expansion conversion circuit 10; and then the Type-C interface module 103 uploads the circuit demand signal to the PD power adapter 40, so that the PD power adapter 40 can make a power supply response according to the charging demand of the multifunctional signal expansion conversion circuit 10 to start the power output process.
The Type-C interface module 103 is further configured to receive a first power signal output by the PD power adapter 40 according to the power demand signal.
The first power signal contains specific electric energy, the Type-C interface module 103 can realize transfer and transmission of the electric energy, and the amplitude of the first power signal can completely match the charging power of the multifunctional signal expansion conversion circuit 10; and then this embodiment can realize the compatible transmission function of electric energy through Type-C interface module 103, and then can realize the power-on function of each circuit module through the first power signal of Type-C interface module 103 output.
The power conversion module 104 outputs the first power signal to the signal conversion module 102.
The power conversion module 104 can ensure the transmission efficiency and transmission accuracy of the first power signal in the multifunctional signal expansion and conversion circuit 10, and the signal conversion module 102 can access rated voltage or rated current according to the first power signal to realize a power-on function; and then can guarantee the security and the reliability of charging of each circuit module completely through first power signal, circuit module can self-adaptively insert with the electric energy that self power matches, has improved the charge efficiency and the work efficiency of multi-functional signal extension converting circuit 10.
In the multifunctional signal expansion converting circuit 10 shown in fig. 1, on one hand, the video playing information of the HDMI interface 20 is transmitted to the mobile terminal 30, so that the mobile terminal 30 generates a first video signal matching with the video playing requirement of the HDMI interface 20, and then converts the video data in the first video signal to obtain an HDMI video signal, which ensures the conversion quality and transmission efficiency of the HDMI video signal, so that the HDMI interface 20 can receive the HDMI video signal and implement a high-definition video playing function, therefore, the multifunctional signal expansion converting circuit 10 in this embodiment can convert various signal sources into corresponding HDMI video signals, and has strong compatibility, high signal conversion efficiency, and reduced conversion cost of the signal source; on the other hand, the charging requirement of the signal conversion module 102 is output to the PD power adapter 40, so that the PD power adapter 40 can adjust its own current and voltage, and start power supply to the circuit module, thereby greatly ensuring the charging efficiency and charging safety of the multifunctional signal expansion conversion circuit 10, and the signal conversion module 102 can always access rated electric energy to realize the PD power supply function; therefore, the multifunctional signal expansion conversion circuit 10 in the embodiment not only realizes the compatible conversion of video signals, but also ensures the charging efficiency, and effectively solves the problems that the conversion circuit in the conventional technology cannot convert signal sources of different types, the compatibility is low, the quality of video signal conversion is reduced, the operation is complex, the PD power supply function cannot be realized, the charging safety of video equipment is low, and the use experience of a user is poor.
As an alternative implementation, fig. 2 shows another structural schematic of the multi-function signal expansion converting circuit 10 provided in this embodiment, and compared with the structure of the multi-function signal expansion converting circuit 10 in fig. 1, the multi-function signal expansion converting circuit 10 in fig. 2 further includes: a second video transmission module 105; the second video transmission module 105 is connected to the signal conversion module 102, so that signal transmission can be realized between the second video transmission module 105 and the signal conversion module 102.
The second video transmission module 105 is configured to detect whether the MINI display port (MINI DP) interface 50 is accessed, and receive a second identification signal output by the MINI DP interface 50 when the MINI DP interface 50 is accessed.
Specifically, when the MINI DP interface 50 is not connected, the second video transmission module 105 cannot receive the second identification signal output by the MINI DP interface 50, and a communication interruption state occurs between the multifunctional signal extension conversion circuit 10 and the MINI DP interface 50.
It should be noted that the MINI DP interface 50 and the HDMI interface 20 are two different types of video transmission interfaces, and the MINI DP interface 50 and the HDMI interface 20 respectively transmit video signals with different formats and different bandwidths, and each interface also has a video signal matched with its own format.
When the second video transmission module 105 is connected to the MINI DP interface 50, signal interaction is implemented between the second video transmission module 105 and the MINI DP interface 50, and the second identity signal of the MINI DP interface 50 can be connected through the MINI DP interface 50, so as to obtain the video playing requirement of the MINI DP interface 50.
The signal conversion module 102 is further configured to transmit a second identification signal.
The Type-C interface module 103 is configured to upload the second identification signal to the mobile terminal 30, and receive a second video signal output by the mobile terminal 30 according to the second identification signal.
The second identification signal includes video playing parameters of the MINI DP interface 50, for example, the second identification signal includes video resolution or format requirement information of the MINI DP interface 50; therefore, when the mobile terminal 30 receives the second identification signal, the mobile terminal 30 can generate a second video signal completely matching the video playing parameter of the MINI DP interface 50, where the second video signal includes audio data and video data, and further the second video signal can completely meet the video playing requirement of the MINI DP interface 50, and the multifunctional signal extension conversion circuit 10 can accurately transmit the video playing parameter of the MINI DP interface 50 and receive the video data fed back by the mobile terminal 30, and has higher signal transmission efficiency.
The signal conversion module 102 decodes the second video signal to obtain an MINI DP video signal.
The second video signal is decoded by the signal conversion module 102 to obtain video data in the second video signal, and format conversion is performed on the video data to generate an MINI DP video signal, so that the MINI DP video signal can completely match the video format requirement of the MINI DP interface 50, and the MINI DP interface 50 can stably identify the video data output by the MINI DP interface 50.
The second video transmission module 105 is also used to output the MINI DP video signal to the MINI DP interface 50.
The second video transmission module 105 and the MINI DP interface 30 implement a bidirectional signal transmission function, and when the MINI DP interface 50 receives the MINI DP video signal, the MINI DP interface 50 can be compatible with a video data format in the MINI DP video signal, and can implement a clear video playing function according to the MINI DP video signal, thereby improving the video playing quality and efficiency of the MINI DP interface 50.
In the structural schematic of the multifunctional signal expansion and conversion circuit 10 shown in fig. 2, the multifunctional signal expansion and conversion circuit 10 can respectively send the video playing requirement of the HDMI interface 20 and the video playing requirement of the MINI DP interface 50 to the mobile terminal 30, and drive the mobile terminal 30 to generate video signals meeting the video playing requirement of the HDMI interface 20 and the video playing requirement of the MINI DP interface 50, and then decode the video signals and output video data to the HDMI interface 20 and the MINI DP interface 50, respectively, so the multifunctional signal expansion and conversion circuit 10 in this embodiment has higher conversion compatibility and signal transmission efficiency for the video signals, greatly improves the video information quality of the HDMI interface 20 and the MINI DP interface 50, and has a wider application range.
As an optional implementation manner, fig. 3 shows a schematic structure of the power conversion module 104 provided in this embodiment, please refer to fig. 3, where the power conversion module 104 includes a power conversion unit 1041 and an energy storage unit 1042, where the power conversion unit 1041 is connected to the Type-C interface module 103, and the energy storage unit 1042 is connected to the power conversion unit 1041 and the signal conversion module 102.
The energy storage unit 1042 is configured to receive and store the power demand signal output by the signal conversion module 102.
The energy storage unit 1042 has functions of data storage and data transfer, and the charging power change condition of the signal conversion module 102 can be obtained in real time through the power demand signal stored by the energy storage unit 1042, so that the signal conversion module 102 is powered in time according to the power demand signal, and the charging safety and the charging efficiency of the signal conversion module 102 are guaranteed.
The power conversion unit 1041 is configured to, when receiving the power supply signal, read the power demand signal stored in the energy storage unit 1042, and output the power demand signal to the Type-C interface module 103.
When the power conversion unit 1041 receives the power supply signal, the power conversion unit 1041 enters a charging state, and the power conversion unit 1041 reads the power requirement information of each circuit module in the energy storage unit 1042 in real time to realize the self-adaptive charging function for each circuit module in the multifunctional signal expansion conversion circuit 10, so that the mobile terminal 30 can quickly obtain the charging power requirement for the circuit module and output the power with a specific capacity to realize the power transmission function for the multifunctional signal expansion conversion circuit 10.
The energy storage unit 1042 is further configured to receive and store the first power signal output by the power conversion unit 1041, convert the first power signal into a second power signal, and output the second power signal to the signal conversion module 102.
Specifically, the energy storage unit 1042 stores the first power signal to realize the function of storing electric energy, and adaptively adjusts the current/voltage of the first power signal through the energy storage unit 1042 to generate a second power signal, wherein the amplitude of the second power signal can completely meet the requirements of the safe charging voltage/safe charging current of the signal conversion module 102; therefore, after the energy storage unit 1042 converts the electric energy in real time, the electric energy output by the energy storage unit 1042 can enable each circuit module to be in a rated charging state, so as to realize a safe PD power supply function of the circuit module, improve the charging efficiency and the charging precision of the circuit module, and the circuit module has higher physical safety and controllability when being connected with the electric energy.
In the structural schematic diagram of the power conversion module 104 shown in fig. 3, the power transmission and conversion process of the power conversion module 104 has higher flexibility and controllability, the energy storage unit 1042 has a storage function of a power demand signal and a power signal, the mobile terminal 30 can obtain the charging demand information of the circuit module in real time to realize a self-adaptive PD power supply function, and after the first power signal is stored and converted by the energy storage unit 1042, the rated voltage/rated current can be output to the corresponding circuit module, so that the safe power-on efficiency of each circuit module is ensured, and the power conversion module 104 has a better power transmission function and a better power conversion function.
As an alternative implementation, fig. 4 shows a schematic circuit diagram of the power conversion unit 1041 provided in this embodiment, please refer to fig. 4, where the power conversion unit 1041 includes: the charging control circuit comprises a charging control chip U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7.
The first end of the first capacitor C1, the first end of the second capacitor C2, the first end of the third capacitor C3, and the first end of the fourth capacitor C4 are commonly connected to the first voltage regulation control pin VDD5V of the charging control chip U1.
The second terminal of the first capacitor C1, the second terminal of the second capacitor C2, the second terminal of the third capacitor C3, and the second terminal of the fourth capacitor C4 are connected to the ground GND.
The first terminal of the fifth capacitor C5, the first terminal of the sixth capacitor C6, and the first terminal of the seventh capacitor C7 are all connected to the second voltage regulation control pin VCC3V of the charging control chip U1, and the second terminal of the fifth capacitor C5, the second terminal of the sixth capacitor C6, and the second terminal of the seventh capacitor C7 are all connected to the ground GND.
And then the charging control chip U1 combines the first voltage regulation control pin VDD5V and the second voltage regulation control pin VCC3V to keep the self electric energy in a stable state, which guarantees the physical safety and control stability of the charging control chip U1.
A power supply signal input pin DVCC18 of the charging control chip U1 is connected with the Type-C interface module 103; further, the power supply signal input pin DVCC18 of the charging control chip U1 can receive the power supply signal and output the power demand signal, and implement the power supply signal transfer function.
A power signal output pin VDD5IN of the charging control chip U1 is connected with the energy storage unit 1042; and the charging control chip U1 realizes the transmission of power demand information and the transmission of electric energy through the power signal output pin VDD5IN and the energy storage unit 1042.
Optionally, the model of the charging control chip U1 is: VL 102; in this embodiment, the charging control chip U1 coordinates the matching relationship between the charging requirement of the circuit module and the power supply performance of the PD power adapter 40, and a real-time handshake protocol and negotiation function are formed between the multifunctional signal expansion and conversion circuit 10 and the PD power adapter 40, so that the multifunctional signal expansion and conversion circuit 10 can be compatible with different types of external electric energy, and a fast PD power-on function is realized, thereby improving the power compatibility and controllability of the multifunctional signal expansion and conversion circuit 10.
As an alternative implementation, fig. 5 shows a schematic circuit diagram of the first video transmission module 101 provided in this embodiment, please refer to fig. 5, where the first video transmission module 101 includes: the HDMI conversion chip comprises an HDMI conversion chip U2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and at least one damping diode U3.
Each differential signal output pin of the HDMI converting chip U2 is connected to the HDMI interface 20 through a damping diode U3.
For example, referring to fig. 5, the differential signal output pin of the HDMI converting chip U2 includes: TX0P0, TX0N0, TX0P1, TX0N1, TX0P2, TX0N2, TX0P3, and TX0N 3; and then the differential signal output pin of the HDMI conversion chip U2 outputs the HDMI video signal, and the HDMI video signal is transmitted in a differential manner, so that the integrity and transmission efficiency of video data in the HDMI video signal are guaranteed, and the HDMI conversion chip U2 and the HDMI interface 20 have higher video signal transmission quality and transmission efficiency.
Illustratively, the damping diode U3 is of the type: ESD3V3U4ULC, damping diode U3 can absorb each differential signal output pin of HDMI conversion chip U2 because of the electric energy of static electricity release, prevents that the differential signal output pin of HDMI conversion chip U2 from suffering electrostatic damage, and then can output the HDMI video signal safely through the differential signal output pin of HDMI conversion chip U2, has improved the video signal transmission security and the reliability of multi-functional signal extension converting circuit 10.
The signal output pin of the HDMI converting chip U2 is connected to the signal converting module 102.
For example, referring to fig. 5, the signal output pin of the HDMI converting chip U2 includes: TX0AUXP and TXOAUXN. Furthermore, the HDMI converting chip U2 maintains a compatible data communication function with the signal converting module 102 through the signal output pin.
The status detection pin TX0HPD of the HDMI switch chip U2 and the first end of the first resistor R1 are commonly connected to form a status detection end of the first video transmission module 101, and the status detection end of the first video transmission module 101 is used for detecting whether the HDMI interface 20 is connected.
A first end of the second resistor R2 and a first end of the fifth resistor R5 are commonly connected to the first serial communication pin TX0DDCSDA of the HDMI converting chip U2, a first end of the third resistor R3 and a first end of the fourth resistor R4 are commonly connected to the second serial communication pin TX0 ddscl of the HDMI converting chip U2, and a second end of the second resistor R2 and a second end of the third resistor R3 are commonly connected to the first dc power supply.
Optionally, the first dc power supply is a 1V to 10V dc power supply.
The first end of the sixth resistor R6 and the first end of the seventh resistor R7 are connected to the second DC power supply.
Optionally, the second dc power supply is a 1V-10V dc power supply; the combination of the first dc power supply and the second dc power supply can maintain the first serial communication pin TX0DDCSDA and the second serial communication pin TX0 ddscl of the HDMI conversion chip U2, so as to maintain the information interaction function with higher efficiency.
The second terminal of the fourth resistor R4, the second terminal of the fifth resistor R5, the second terminal of the sixth resistor R6, and the second terminal of the seventh resistor R7 are serial communication terminals of the first video transmission module 101, and the serial communication terminal 101 of the first video transmission module 101 is connected to the HDMI interface 20.
When the state detection terminal of the first video transmission module 101 is connected to the HDMI interface 20, the serial communication terminal of the first video transmission module 101 receives the first identity signal output by the HDMI interface 20, so as to improve the conversion efficiency and conversion precision of each circuit module in the multifunctional signal expansion and conversion circuit 10 for video data, and the first video transmission module 101 has higher video information transmission efficiency and stability.
Optionally, the model of the HDMI converting chip U2 is: a VMM 3332; illustratively, when the HDMI interface 20 is inserted into the first video transmission module 101, the status detection pin TX0HPD of the HDMI conversion chip U2 receives a high level sent by the HDMI interface 20, when the status detection pin TX0HPD detects the high level, the first serial communication pin TX0DDCSDA and the second serial communication pin TX0 ddcsl of the HDMI conversion chip U2 sequentially transmit the video playback requirement information of the HDMI interface 20 to the mobile terminal 30, the mobile terminal 30 outputs video data according to the video playback requirement of the HDMI interface 20, and after signal conversion by the signal conversion module 102, the signal output pin of the HDMI conversion chip U2 outputs the HDMI video signal to the HDMI interface 20 to meet the actual video playback format requirement of the HDMI interface 20.
As an alternative implementation, fig. 6 shows a schematic circuit diagram of the second video transmission module 105 provided in this embodiment, please refer to fig. 6, where the second video transmission module 105 includes: the circuit comprises a DP conversion chip U4, an eighth resistor R8, a ninth resistor R9, an eighth capacitor C8 and at least one ninth capacitor C9.
The status detection pin TX1HPD of the DP switch chip U4 is used to detect whether the MINI DP interface 50 is plugged in.
The state information input pin CAD1 of the DP conversion chip U4 is connected with the MINI DP interface 50 through an eighth capacitor; when the second video transmission module 105 is connected to the MINI DP interface 50, the second identification signal output by the MINI DP interface 50 can be connected through the status information input pin CAD1 of the DP conversion chip U4, so as to obtain the video playing requirement of the MINI DP interface 50 in real time, and improve the efficiency of video signal transmission and conversion.
Each video signal output pin of the DP conversion chip U4 is connected to the MINI DP interface 50 through a ninth capacitor C9; for example, referring to fig. 6, the video signal output pin of the DP conversion chip U4 includes: TX1P0, TX1N0, TX1P1, TX1N1, TX1P2, TX1N2, TX1P3, and TX1N3, and then the video signal output pin of DP conversion chip U4 can output the MINI DP video signal to the MINI DP interface 50, so as to ensure the signal transmission efficiency between DP conversion chip U4 and MINI DP interface 50.
The first serial communication pin TX1 ddcslc of the DP conversion chip U4, the second serial communication pin TX1DDCSDA of the DP conversion chip, the first end of the eighth resistor R8, and the first end of the ninth resistor R9 are serial communication ends of the second video transmission module 105, and the second video transmission module 105 is connected to the signal conversion module 102 in a serial communication end.
The second end of the eighth resistor R8 and the second end of the ninth resistor R9 are connected to the third DC power supply.
Optionally, the model of the DP conversion chip U4 is: VMM 3332.
As an alternative implementation, fig. 7 shows a schematic circuit diagram of the Typc-C interface module 103 provided in this embodiment, please refer to fig. 7, where the Typc-C interface module 103 includes: the circuit comprises a Typc-C conversion chip U5, a first switch tube M1, a tenth resistor R10 and an eleventh resistor R11.
A video signal input pin of the Typc-C conversion chip U5 is connected with the mobile terminal 20; illustratively, as shown in fig. 7, the video signal input pin of the Typc-C conversion chip U5 includes: RRXON and RRXOP, and then the Typc-C conversion chip U5 and the mobile terminal 20 realize good signal interaction function.
A video signal output pin of the Typc-C conversion chip U5 is connected with the signal conversion module 102; illustratively, the video signal output pin of the Typc-C conversion chip U5 includes: DP1 and DM 1.
The power signal input pin SBU1 of the Typc-C conversion chip U5 is used to access the PD power adapter 40.
A power signal output pin SBU2 of the Typc-C conversion chip U5 is connected with the power conversion module 104; and then the Typc-C conversion chip U5 combines the power signal input pin SBU1 and the power signal output pin SBU2 to realize the functions of transmitting power demand information and converting and outputting power signals, and the PD power-on efficiency and precision of the multifunctional signal expansion conversion circuit 10 are improved.
The ground pin of the Typc-C conversion chip U5 is grounded GND.
The first end of the tenth resistor R10 is connected to a power supply enabling pin VBUS of the Typc-C conversion chip U5, the second end of the tenth resistor R10 is connected to the first conducting end of the first switch tube M1, the second conducting end of the first switch tube M1 is grounded GND, the control end of the first switch tube M1 and the first end of the eleventh resistor R11 are connected to a power supply enabling signal in common, the Typc-C conversion chip U5 can be driven by the power supply enabling signal to achieve a stable signal transmission function, and the second end of the eleventh resistor R11 is grounded GND.
Optionally, the type of the Typc-C conversion chip U5 is: OV 2659.
Optionally, the mobile terminal 30 includes at least one of a mobile phone and a tablet computer.
Fig. 8 shows a structural schematic diagram of the display device 80 with a split-screen function provided in this embodiment, please refer to fig. 8, the display device 80 includes: the multifunctional signal expansion converting circuit 10 and at least two display screens (fig. 8 shows 801 and 802 … 80M, where M is greater than or equal to 1) as described above.
Each display screen is connected with the multifunctional signal expansion and conversion circuit 10, and the display screens are accessed and perform video display according to the HDMI video signals and/or the MINI DP video signals.
Optionally, a plurality of display screens in the display device 80 may be spliced to display a complete picture, so as to provide a better visual video viewing effect for the technician.
Optionally, each display screen in the display device 80 may be independent of another, and each display screen may access to the video signal respectively and display a corresponding image or video, and the display device may display a plurality of different images through a plurality of display screens, so that the display device 80 may present richer video information, and bring better visual experience to the user.
After the external signal source is converted and transmitted by the multi-function signal expansion converting circuit 10, the multi-function signal expansion converting circuit 10 can output the HDMI video signal and/or the MINI DP video signal to each display screen, so that each display screen receives video data in real time and presents complete image/video information.
Referring to the embodiments of fig. 1 to 7, the multifunctional signal expansion converting circuit 10 converts the video data in the mobile terminal into the corresponding HDMI video signal and/or MINI DP video signal, so that each display screen in the display device can be compatible and applicable to different industrial technology fields, and the function of displaying the video in real time is realized; the multifunctional signal expansion conversion circuit 10 can realize PD electrification, the internal circuit structure and the manufacturing cost of the multifunctional signal expansion conversion circuit 10 are simplified, and the display device 80 presents high-definition video information and has high flexibility; therefore, the display device 80 can realize the functions of image segmentation and multi-screen display, combine a plurality of respectively accessed video data, and present a plurality of different images or form a complete image, thereby bringing good visual experience to users; therefore, the problems that the display device in the traditional technology cannot be compatible with different types of video signals, the conversion steps of the video signals are complex, the compatibility is low, and the visual experience of a user is poor are effectively solved.
As an alternative embodiment, fig. 9 shows another structural schematic diagram of the display device 80 with a split-screen function provided in this embodiment, please refer to fig. 9, where at least two display screens include: a first display 901 and a second display 902.
The first display screen 901 is connected to the multifunctional signal expansion and conversion circuit 10, and the first display screen 901 is connected to and performs video display according to the HDMI video signal.
After the external signal source is adaptively converted and transmitted through the multifunctional signal expansion converting circuit 10, the first display 901 can access and recognize the HDMI video signal and present a complete and clear picture.
The second display screen 902 is connected to the multifunctional signal expansion and conversion circuit 10, and the second display screen 902 is connected to and performs video display according to the MINI DP video signal.
Optionally, the first display 901 and the second display 902 have the same video display content; or the first display 901 and the second display 902 have different video display contents; therefore, the first display screen 901 and the second display screen 902 in this embodiment can access corresponding video signals to present corresponding video information, and the display device 80 can be applied to various different industrial technologies and present a better video display effect.
Illustratively, the first display 901 is a main display, the second display 902 is an auxiliary display, and when the multifunctional signal expansion conversion circuit 10 outputs the HDMI video signal and the MINI DP video signal to the corresponding display, each display can access the video signal matched with its own video playing requirement, and display a complete and clear picture, so as to meet the actual visual requirement of the user.
The display device 80 in this embodiment, in combination with the first display screen 901 and the second display screen 902, can compatibly identify different external video data to display clearer and more complete video information, and has extremely strong compatibility; the arrangement and combination of the video signals can be realized by combining the first display screen 901 and the second display screen 902 to form a more complete and clear picture, which brings higher visual experience to users.
To better illustrate the video frequency division principle and the advantages of the display device 80 with the screen division function in this embodiment, a comparative analysis will be performed below with specific reference to the operating systems of the Windows system and the apple operating system to discuss the advantages of the display device 80, specifically as follows:
the computer display card of the existing Windows system can be expanded by 2 displays, and each display can display corresponding video information.
And all computers of apple series can only support 2 display cards at most because of the display card, and can only display 2 paths of pictures even if 3 displays are connected, and the video display function is limited.
Because the apple computer can not expand more than 2 pictures, the application is limited, the apple computer can not be better compatible with the market, and the diversified requirements of customers are met; the embodiment of the utility model provides an in display device 80 can realize 3 display screen display more than 3 even to video display effect in each display screen is inequality, in order to satisfy user's diversified demand.
In conjunction with the embodiments of fig. 1-9, when the HDMI interface 20 and the MINI DP interface 50 are simultaneously plugged in, the information of the external display is received by the first video transmission module 101 and the second video transmission module 105, and is transmitted to the mobile terminal 30, and after the mobile terminal 30 receives the information, the video signal is transmitted to the signal conversion module 102, the signal conversion module 102 decomposes and rearranges the video signal given by the receiving mobile terminal 30 in a software picture cutting mode embedded in the signal conversion module 102, so that the video signal is divided into 2 different video signals which are transmitted to the HDMI interface 20 and the MINIDP interface 50 through the first video transmission module 101 and the second video transmission module 105, respectively, so that the display screen corresponding to the HDMI interface 20 and the display screen corresponding to the MINIDP interface 50 present different video information, thereby realizing a screen splitting function and giving a good visual experience to a user.
Therefore, the display device 80 of the present embodiment can be accessed to the HDMI interface 20 and the MINI DP interface 50 in parallel, and has strong compatibility, and can display the video information on different display screens respectively, so that the display device has strong flexibility and expandability, and a wide application range.
Therefore, in the embodiment, the display device 80 provides the function of the picture division mode of the user on the plurality of display screens, and the video signal conversion function of the display device 80 has high expansibility and compatibility, so that the requirement of multi-screen display of the user is met, the office efficiency is improved, for example, the split screen contrast data, the split screen window chat and the like are met, the split screen requirement of the user is met, and the application range is wide.
Various embodiments are described herein for various devices, circuits, apparatuses, systems, and/or methods. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.
Reference throughout the specification to "various embodiments," "in an embodiment," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with features, structures, or characteristics of one or more other embodiments without presuming that such combination is not an illogical or functional limitation. Any directional references (e.g., plus, minus, upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above …, below …, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to aid the reader's understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of the embodiments.
Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. The use of "for example" throughout this specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the disclosure, and the disclosure is not limited to such examples. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the disclosure.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A multi-function signal expansion conversion circuit, comprising: the device comprises a first video transmission module, a signal conversion module, a Type-C interface module and a power conversion module;
the first video transmission module is connected with the signal conversion module, the Type-C interface module is connected with the signal conversion module, and the power conversion module is connected with the Type-C interface module and the signal conversion module;
the first video transmission module is used for detecting whether an HDMI (high-definition multimedia interface) is accessed, and receiving a first identity identification signal output by the HDMI when the HDMI is accessed;
the signal conversion module is used for transmitting the first identity identification signal;
the Type-C interface module is used for uploading the first identity identification signal to a mobile terminal and receiving a first video signal output by the mobile terminal according to the first identity identification signal;
the signal conversion module is also used for decoding the first video signal to obtain an HDMI video signal;
the first video transmission module is also used for outputting the HDMI video signal to the HDMI interface;
the Type-C interface module is also used for detecting whether a PD power adapter is accessed, and receiving a power supply signal sent by the PD power adapter when the PD power adapter is accessed;
the power supply conversion module is used for receiving a power demand signal output by the signal conversion module according to the power supply signal and uploading the power demand signal to the PD power adapter through the Type-C interface module;
the Type-C interface module is also used for receiving a first power supply signal output by the PD power adapter according to the power demand signal;
the power conversion module is further configured to output the first power signal to the signal conversion module.
2. The multi-function signal expansion conversion circuit of claim 1, further comprising: a second video transmission module; the second video transmission module is connected with the signal conversion module;
the second video transmission module is used for detecting whether an MINIDP interface is accessed, and receiving a second identity identification signal output by the MINIDP interface when the MINIDP interface is accessed;
the signal conversion module is further used for transmitting the second identity signal;
the Type-C interface module is further configured to upload the second identity signal to the mobile terminal, and receive a second video signal output by the mobile terminal according to the second identity signal;
the signal conversion module is further used for decoding the second video signal to obtain an MINIDP video signal;
the second video transmission module is further configured to output the MINIDP video signal to the MINIDP interface.
3. The multi-functional signal expansion conversion circuit of claim 1, wherein the power conversion module comprises: the power supply conversion unit and the energy storage unit; the power supply conversion unit is connected with the Type-C interface module, and the energy storage unit is connected with the power supply conversion unit and the signal conversion module;
the energy storage unit is used for receiving and storing the output power demand signal of the signal conversion module;
the power supply conversion unit is used for reading a power demand signal stored by the energy storage unit and outputting the power demand signal to the Type-C interface module when receiving the power supply signal;
the energy storage unit is further used for receiving and storing the first power supply signal output by the power supply conversion unit, converting the first power supply signal into a second power supply signal and outputting the second power supply signal to the signal conversion module.
4. The multi-functional signal expansion conversion circuit of claim 3, wherein the power conversion unit comprises:
the charging control chip comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor;
the first end of the first capacitor, the first end of the second capacitor, the first end of the third capacitor and the first end of the fourth capacitor are connected to a first voltage stabilization control pin of the charging control chip in common;
the second end of the first capacitor, the second end of the second capacitor, the second end of the third capacitor and the second end of the fourth capacitor are connected to the ground in common;
the first end of the fifth capacitor, the first end of the sixth capacitor and the first end of the seventh capacitor are connected to a second voltage stabilization control pin of the charging control chip in common, and the second end of the fifth capacitor, the second end of the sixth capacitor and the second end of the seventh capacitor are connected to the ground in common;
a power signal input pin of the charging control chip is connected with the Type-C interface module;
and a power signal output pin of the charging control chip is connected with the energy storage unit.
5. The multi-function signal expansion conversion circuit according to claim 1, wherein the first video transmission module comprises: the HDMI conversion circuit comprises an HDMI conversion chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and at least one damping diode;
each differential signal output pin of the HDMI conversion chip is connected with the HDMI interface through the damping diode;
the signal output pin of the HDMI conversion chip is connected with the signal conversion module;
the state detection pin of the HDMI conversion chip and the first end of the first resistor are connected together to form a state detection end of the first video transmission module, and the state detection end of the first video transmission module is used for detecting whether the HDMI interface is connected or not;
the first end of the second resistor and the first end of the fifth resistor are connected to a first serial communication pin of the HDMI conversion chip in common, the first end of the third resistor and the first end of the fourth resistor are connected to a second serial communication pin of the HDMI conversion chip in common, and the second end of the second resistor and the second end of the third resistor are connected to a first direct-current power supply in common;
the first end of the sixth resistor and the first end of the seventh resistor are connected to a second direct-current power supply in common;
the second end of the fourth resistor, the second end of the fifth resistor, the second end of the sixth resistor and the second end of the seventh resistor are serial communication ends of the first video transmission module, and the serial communication end of the first video transmission module is connected with the HDMI interface.
6. The multi-function signal expansion conversion circuit according to claim 2, wherein the second video transmission module comprises:
the DP conversion chip, the eighth resistor, the ninth resistor, the eighth capacitor and at least one ninth capacitor;
the state detection pin of the DP conversion chip is used for detecting whether the MINIDP interface is accessed;
a state information input pin of the DP conversion chip is connected with the MINIDP interface through the eighth capacitor;
each video signal output pin of the DP conversion chip is connected with the MINIDP interface through a ninth capacitor;
the first serial communication pin of the DP conversion chip, the second serial communication pin of the DP conversion chip, the first end of the eighth resistor, and the first end of the ninth resistor are serial communication ends of the second video transmission module, and the second video transmission module serial communication end is connected to the signal conversion module;
and the second end of the eighth resistor and the second end of the ninth resistor are connected to a third direct current power supply in common.
7. The multifunctional signal extension conversion circuit of claim 1, wherein the Type-C interface module comprises:
the device comprises a Type-C conversion chip, a first switching tube, a tenth resistor and an eleventh resistor;
a video signal input pin of the Type-C conversion chip is connected with the mobile terminal;
the video signal output pin of the Type-C conversion chip is connected with the signal conversion module;
the power supply signal input pin of the Type-C conversion chip is used for accessing the PD power adapter;
the power signal output pin of the Type-C conversion chip is connected with the power conversion module;
the grounding pin of the Type-C conversion chip is grounded;
the first end of the tenth resistor is connected with the power supply enabling pin of the Type-C conversion chip, the second end of the tenth resistor is connected with the first conducting end of the first switch tube, the second conducting end of the first switch tube is grounded, the control end of the first switch tube and the first end of the eleventh resistor are connected with a power supply enabling signal in common, and the second end of the eleventh resistor is grounded.
8. The multi-function signal expansion conversion circuit of claim 1, wherein the mobile terminal comprises at least one of a cell phone and a tablet computer.
9. A display device with a split screen function, comprising:
the multifunctional signal expansion converting circuit of claim 2 or 6; and
each display screen is connected with the multifunctional signal expansion conversion circuit, and the display screens are accessed to perform video display according to the HDMI video signals and/or the MINIDP video signals.
10. The display device of claim 9, wherein at least two of the display screens comprise:
the first display screen is connected with the multifunctional signal expansion conversion circuit, and is accessed to perform video display according to the HDMI video signal; and
and the second display screen is connected with the multifunctional signal expansion and conversion circuit, and is accessed to perform video display according to the MINIDP video signal.
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| CN201921303343.XU CN210297900U (en) | 2019-08-09 | 2019-08-09 | Multifunctional signal expansion conversion circuit and display device with screen splitting function |
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| CN113867184A (en) * | 2020-06-30 | 2021-12-31 | 湖南长城计算机***有限公司 | Function expanding circuit, device and all-in-one computer based on TYPE _ C interface |
| CN113923393A (en) * | 2021-10-19 | 2022-01-11 | 深圳市绿联科技股份有限公司 | Signal converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113867184A (en) * | 2020-06-30 | 2021-12-31 | 湖南长城计算机***有限公司 | Function expanding circuit, device and all-in-one computer based on TYPE _ C interface |
| CN112256611A (en) * | 2020-10-20 | 2021-01-22 | 北京字节跳动网络技术有限公司 | Docking station and system |
| CN113923393A (en) * | 2021-10-19 | 2022-01-11 | 深圳市绿联科技股份有限公司 | Signal converter |
| CN113923393B (en) * | 2021-10-19 | 2023-10-20 | 深圳市绿联科技股份有限公司 | Signal converter |
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Address after: Room 101, building 7, Jiada Industrial Park, west side of Honghu East Road, Yanchuan community, Yanluo street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: FULLINK TECHNOLOGY Co.,Ltd. Address before: Jincheng Street 518000 Shenzhen Road, Guangdong province Baoan District manhole No. 2070 Shi Xia Hong Kong Industrial Zone B building 3-5 layer Patentee before: FULLINK TECHNOLOGY Co.,Ltd. |