CN219329773U - Switch control circuit, video converter and display terminal - Google Patents
Switch control circuit, video converter and display terminal Download PDFInfo
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- CN219329773U CN219329773U CN202320650842.6U CN202320650842U CN219329773U CN 219329773 U CN219329773 U CN 219329773U CN 202320650842 U CN202320650842 U CN 202320650842U CN 219329773 U CN219329773 U CN 219329773U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The utility model relates to a switch control circuit, a video converter and a display terminal, wherein the switch control circuit comprises a first switch control unit for controlling the output of an HDMI power supply, a second switch control unit for controlling the output of a TYPE-C power supply, a first triode and a first field effect tube; when the TYPE C power supply is connected in the HDMI power supply input power supply state, the B electrode of the first triode is in high level, the C, E electrode of the first triode is conducted, the first switch control unit cuts off HDMI power supply output, the No. 1 pin of the first field effect tube is in low level, the No. 2 pin and the No. 3 pin of the first field effect tube are conducted, the second switch control unit controls TYPE C power supply output, and when the HDMI power supply input is not connected in, TYPE C power supply is independently connected in, TYPE C power supply output cannot be conducted; the switch control circuit of the application can better solve the problem of switching between the HDMI power supply and the TYPEC power supply.
Description
Technical Field
The present utility model relates to the field of video conversion technologies, and in particular, to a switch control circuit, a video converter, and a display terminal.
Background
The switch control circuit refers to a tool for converting video formats such as mp4, avi, mov and the like, is mainly used for digital radio frequency modulation, image processing, instruments, video signal reproduction, video telephone, karaoke song requesting device, game machine and the like, and is also suitable for monitoring departments;
the existing video conversion equipment can use HDMI 5V IN to supply power, when the HDMI 5V IN is insufficient IN power supply, a TYPEC 5V IN power port is added to supply power, but the power is required to be supplied according to a fixed sequence, and the power is not supplied according to the fixed sequence, so that the equipment does not work or works abnormally, and therefore, a power supply automatic identification switch control circuit scheme capable of solving the defect is needed.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a switch control circuit, a video converter and a display terminal aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problems is as follows:
a switch control circuit is constructed, wherein the switch control circuit comprises a first switch control unit for controlling the output of an HDMI power supply, a second switch control unit for controlling the output of a TYPE-C power supply, a first triode and a first field effect tube;
the B pole of the first triode is electrically connected with the TYPE-C power supply input end, the E pole is grounded, and the C pole is electrically connected with the first switch control unit and the No. 1 pin of the first field effect tube;
the first switch control unit controls the HDMI power supply to output according to the level signal of the C pole of the first triode;
the No. 2 pin of the first field effect tube is electrically connected with the HDMI power supply input end, and the No. 3 pin is electrically connected with the second switch control unit;
and the second switch control unit controls TYPE-C power supply output according to the level signal of the No. 3 pin of the first field effect transistor.
The switch control circuit provided by the utility model, wherein the first switch control unit and the second switch control unit both comprise power electronic switches;
an OUT pin of the power electronic switch of the first switch control unit is an HDMI power supply output pin, an IN pin is electrically connected with an HDMI power supply input end, an EN pin is electrically connected with a C electrode of the first triode, an ISET pin is grounded, and a GND pin is grounded;
the OUT pin of the power electronic switch of the second switch control unit is a TYPE-C power supply output pin, the IN pin is electrically connected with a TYPE-C power supply input end, the EN pin is electrically connected with a No. 3 pin of the first field effect transistor, the ISET pin is grounded, and the GND pin is grounded.
The switch control circuit provided by the utility model, wherein the first switch control unit and the second switch control unit comprise a second field effect transistor and a double P-channel MOS (metal oxide semiconductor) transistor;
the pin 1 of the second field effect transistor of the first switch control unit is electrically connected with the C electrode of the first triode, the pin 2 is grounded, and the pin 3 is electrically connected with the pins 2 and 4 of the double P-channel MOS transistor; the pins 5 and 6 of the double P-channel MOS tube of the first switch control unit are HDMI power supply output pins, and the pins 7 and 8 are electrically connected with the HDMI power supply input end;
the pin 1 of the second field effect transistor of the second switch control unit is electrically connected with the pin 3 of the first field effect transistor, the pin 2 is grounded, and the pin 3 is electrically connected with the pins 2 and 4 of the double-P-channel MOS transistor; and pins 5 and 6 of the double-P-channel MOS tube of the second switch control unit are TYPE-C power supply output pins, and pins 7 and 8 are electrically connected with TYPE-C power supply input ends.
The switch control circuit comprises a first switch control unit and a second switch control unit, wherein the first switch control unit and the second switch control unit comprise a second triode and a power supply chip;
a pin 1 of a second triode of the first switch control unit is electrically connected with a C electrode of the first triode, a pin 2 is grounded, and a pin 3 is electrically connected with a pin 4 of the power supply chip; the pins 5, 6, 7 and 8 of the power chip of the first switch control unit are HDMI power output pins, and the pins 1, 2 and 3 are electrically connected with the HDMI power input end;
the pin 1 of the second triode of the second switch control unit is electrically connected with the pin 3 of the first field effect tube, the pin 2 is grounded, and the pin 3 is electrically connected with the pin 4 of the power supply chip; and pins 5, 6, 7 and 8 of the power chip of the second switch control unit are TYPE-C power output pins, and pins 1, 2 and 3 are electrically connected with TYPE-C power input ends.
The video converter comprises an HDMI video and power supply input module, a video conversion module and a video output module; the HDMI video and power input module, the video conversion module and the video output module are sequentially in communication connection; the video converter further comprises a switch control circuit as described above; and the switch control circuit automatically identifies the HDMI power input and TYPE-C power input states and controls the power output to supply power to the video conversion module.
A display terminal having a video converter as described above disposed or connected thereto.
The utility model has the beneficial effects that: in a normal state, the first switch control unit adopts HDMI power input to supply power, and the first switch control unit outputs normal HDMI power; when the TYPE C power supply is connected in the HDMI power supply input power supply state, the B electrode of the first triode is in high level, the C, E electrode of the first triode is conducted, the first switch control unit cuts off HDMI power supply output according to the C electrode electric signal of the first triode, the No. 1 pin of the first field effect tube is in low level, the No. 2 pin and the No. 3 pin of the first field effect tube are conducted, the second switch control unit controls to conduct TYPE C power supply output according to the high level signal of the No. 3 pin of the first field effect tube, and when the HDMI power supply input is not connected in, TYPE C power supply is independently connected in, and TYPE C power supply output cannot be conducted; the switch control circuit of the application can better solve the problem of switching between the HDMI power supply and the TYPEC power supply.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained by those skilled in the art without inventive effort:
fig. 1 is a circuit diagram of a switch control circuit according to a first embodiment of the present utility model;
fig. 2 is a circuit diagram of a switch control circuit according to a second embodiment of the present utility model;
fig. 3 is a circuit diagram of a switch control circuit according to a third embodiment of the present utility model;
fig. 4 is a schematic block diagram of a video converter according to a fourth embodiment of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.
Example 1
The switch control circuit of the preferred embodiment of the present utility model, as shown in fig. 1, comprises a first switch control unit for controlling the output of an HDMI power supply, a second switch control unit for controlling the output of a TYPE-C power supply, a first triode Q2 and a first field effect tube Q1;
the B pole of the first triode Q2 is electrically connected with the TYPE-C power supply input end, the E pole is grounded, and the C pole is electrically connected with the first switch control unit and the No. 1 pin of the first field effect tube Q1;
the first switch control unit controls the HDMI power supply to output according to the level signal of the C electrode of the first triode Q1;
the No. 2 pin of the first field effect tube Q1 is electrically connected with the HDMI power supply input end, and the No. 3 pin is electrically connected with the second switch control unit;
the second switch control unit controls TYPE-C power supply output according to the level signal of the No. 3 pin of the first field effect transistor Q1.
In a normal state, the first switch control unit adopts HDMI power input to supply power, and the first switch control unit outputs normal HDMI power; when the TYPE C power supply is connected in the HDMI power supply input power supply state, the B electrode of the first triode is in high level, the C, E electrode of the first triode is conducted, the first switch control unit cuts off HDMI power supply output according to the C electrode electric signal of the first triode, the No. 1 pin of the first field effect tube is in low level, the No. 2 pin and the No. 3 pin of the first field effect tube are conducted, the second switch control unit controls to conduct TYPE C power supply output according to the high level signal of the No. 3 pin of the first field effect tube, and when the HDMI power supply input is not connected in, TYPE C power supply is independently connected in, and TYPE C power supply output cannot be conducted; the switch control circuit of the application can better solve the problem of switching between the HDMI power supply and the TYPEC power supply.
Preferably, the first switch control unit and the second switch control unit each comprise a power electronic switch, an optional number DIO7002AST5 and the like;
the OUT pin of the power electronic switch U1 of the first switch control unit is an HDMI power supply output pin, the IN pin is electrically connected with the HDMI power supply input end, the EN pin is electrically connected with the C electrode of the first triode, the ISET pin is grounded, and the GND pin is grounded;
the OUT pin of the power electronic switch U2 of the second switch control unit is a TYPE-C power supply output pin, the IN pin is electrically connected with a TYPE-C power supply input end, the EN pin is electrically connected with the No. 3 pin of the first field effect transistor, the ISET pin is grounded, and the GND pin is grounded;
the specific principle is as follows:
the video converter device is powered by using HDMI 5V IN, the HDMI_5V voltage is high level U1 EN pin high level, and the voltage HDMI_5V is input by U1 IN pin and the OUT pin outputs 5V_SYS voltage to power the device;
when HDMI 5V IN supplies power to the equipment, a TYPEC 5V IN power port is inserted to supply power to the equipment, at the moment, VCC_5V inputs high level Q2B to be extremely high level, Q2 CE turns on U1 EN pin to be pulled to be low level U1, OUT pin is automatically disconnected and no output is carried OUT, at the moment, Q1 1 pin is low level, Q1 2/3 pin turns on U2 EN pin to be high level, voltage VCC_5V is input by U2 IN pin, U2 OUT pin outputs 5V_SYS to supply power to the equipment; in the process, the power supply switching equipment can restart itself; when the HDMI interface is not connected, the TYPEC 5V IN power supply port is independently inserted to supply power to the equipment.
Example two
The embodiment is basically the same as the first embodiment, and the details are not repeated, as shown in fig. 2, except that: the first switch control unit and the second switch control unit comprise a second field effect transistor and a double P-channel MOS transistor, wherein the double P-channel MOS transistor is selected by an AO4805 and the like;
the pin 1 of the second field effect transistor Q4 of the first switch control unit is electrically connected with the C electrode of the first triode Q6, the pin 2 is grounded, and the pin 3 is electrically connected with pins 2 and 4 of the double P-channel MOS transistor (U4 A+U 4B); pins 5 and 6 of the double P-channel MOS tube (U4 A+U 4B) of the first switch control unit are HDMI power supply output pins, and pins 7 and 8 are electrically connected with an HDMI power supply input end;
the pin 1 of the second field effect transistor Q3 of the second switch control unit is electrically connected with the pin 3 of the first field effect transistor Q5, the pin 2 is grounded, and the pin 3 is electrically connected with pins 2 and 4 of the double P-channel MOS transistor (U3A+U3B); and pins 5 and 6 of the double-P-channel MOS tube (U4 A+U 4B) of the second switch control unit are TYPE-C power supply output pins, and pins 7 and 8 are electrically connected with TYPE-C power supply input ends.
The specific principle is as follows:
the video converter device is powered by HDMI 5V IN, the HDMI_5V voltage is high level Q4 1 pin is high level, Q4 2/3 pin is conducted, U4 2/4 pin is low level, U4 conduction 7/8 pin is input, U4 5/6 pin outputs high level 5V_SYS voltage to power the device;
when HDMI 5V IN supplies power to the equipment, a TYPEC 5V IN power port is plugged to supply power to the equipment, at the moment, VCC_5V input high level Q6B is extremely high level, Q6 CE pole conduction Q4 1 pin is pulled to be low level, Q4 2/3 pin disconnection U4 2/4 is high level, U4 is automatically disconnected to 5/6 pin no output, at the moment, Q5 1 pin is low level, Q5 2/3 pin conduction Q3 1 pin is high level, Q3 2/3 pin conduction, U3 2/4 pin is pulled to be low level, voltage VCC_5V is input by U3 7/8 pin, U3 5/6 pin output 5V_SYS supplies power to the equipment; in the process, the power supply switching equipment can restart itself; when the HDMI interface is not connected, the TYPEC 5V IN power supply port is independently inserted to supply power to the equipment.
Example III
In the switch control circuit of the utility model, as shown in fig. 3, the first switch control unit and the second switch control unit both comprise a second triode and a power supply chip, and the power supply chip can select the number AO4435 and the like;
the pin 1 of the second triode Q8 of the first switch control unit is electrically connected with the C electrode of the first triode Q10, the pin 2 is grounded, and the pin 3 is electrically connected with the pin 4 of the power supply chip U6; the 5, 6, 7 and 8 pins of the power chip U6 of the first switch control unit are HDMI power output pins, and the 1, 2 and 3 pins are electrically connected with the HDMI power input end;
the pin 1 of the second triode Q7 of the second switch control unit is electrically connected with the pin 3 of the first field effect tube Q9, the pin 2 is grounded, and the pin 3 is electrically connected with the pin 4 of the power supply chip; the pins 5, 6, 7 and 8 of the power chip U5 of the second switch control unit are TYPE-C power output pins, and the pins 1, 2 and 3 are electrically connected with the TYPE-C power input end.
The specific principle is as follows:
the video converter device is powered by HDMI 5V IN, the HDMI_5V voltage is high level Q8 1 pin is high level, Q8 2/3 pin is conducted, U6 4 pin is low level, U6 is conducted 1/2/3 pin is input, and U6 5/6/7/8 pin outputs high level 5V_SYS voltage to supply power to the device.
When HDMI 5V IN supplies power to the equipment, a TYPEC 5V IN power supply port is plugged IN to supply power to the equipment, wherein VCC_5V input high level Q10B is extremely high level, Q10 CE pole conduction Q8 1 pin is pulled to be low level, Q8 2/3 pin is disconnected, U6 4 pin is high level, U6 is automatically disconnected to enable 5/6/7/8 pin to be no output, Q9 1 pin is low level, Q9 2/3 pin conduction Q7 1 pin is high level, Q7 2/3 pin conduction is conducted, U5 4 pin is pulled to be low level, voltage VCC_5V is input by U5 1/2/3 pin, U5 5/6/7/8 pin outputs 5V_SYS to supply power to the equipment. In the process, the power supply switching equipment can restart itself; when the HDMI interface is not connected, the TYPEC 5V IN power supply port is independently inserted to supply power to the equipment.
Example IV
A video converter, as shown in fig. 4, includes an HDMI video and power input module 1, a video conversion module 2, and a video output module 3; the HDMI video and power input module 1, the video conversion module 2 and the video output module 3 are sequentially in communication connection;
the video converter further comprises a switch control circuit 4 as described above; the switch control circuit 4 automatically recognizes the HDMI power input and TYPE-C power input states and controls the power output to supply power to the video conversion module;
the switch control circuit 4 is used for input control, so that the existing switching problems of HDMI power input and TYPE-C power input can be well solved.
Example five
A display terminal on which the video converter as described above is provided or connected.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (6)
1. The switch control circuit is characterized by comprising a first switch control unit for controlling the output of an HDMI power supply, a second switch control unit for controlling the output of a TYPE-C power supply, a first triode and a first field effect tube;
the B pole of the first triode is electrically connected with the TYPE-C power supply input end, the E pole is grounded, and the C pole is electrically connected with the first switch control unit and the No. 1 pin of the first field effect tube;
the first switch control unit controls the HDMI power supply to output according to the level signal of the C pole of the first triode;
the No. 2 pin of the first field effect tube is electrically connected with the HDMI power supply input end, and the No. 3 pin is electrically connected with the second switch control unit;
and the second switch control unit controls TYPE-C power supply output according to the level signal of the No. 3 pin of the first field effect transistor.
2. The switch control circuit of claim 1, wherein the first switch control unit and the second switch control unit each comprise a power electronic switch;
an OUT pin of the power electronic switch of the first switch control unit is an HDMI power supply output pin, an IN pin is electrically connected with an HDMI power supply input end, an EN pin is electrically connected with a C electrode of the first triode, an ISET pin is grounded, and a GND pin is grounded;
the OUT pin of the power electronic switch of the second switch control unit is a TYPE-C power supply output pin, the IN pin is electrically connected with a TYPE-C power supply input end, the EN pin is electrically connected with a No. 3 pin of the first field effect transistor, the ISET pin is grounded, and the GND pin is grounded.
3. The switch control circuit of claim 1, wherein the first switch control unit and the second switch control unit each comprise a second field effect transistor and a double P-channel MOS transistor;
the pin 1 of the second field effect transistor of the first switch control unit is electrically connected with the C electrode of the first triode, the pin 2 is grounded, and the pin 3 is electrically connected with the pins 2 and 4 of the double P-channel MOS transistor; the pins 5 and 6 of the double P-channel MOS tube of the first switch control unit are HDMI power supply output pins, and the pins 7 and 8 are electrically connected with the HDMI power supply input end;
the pin 1 of the second field effect transistor of the second switch control unit is electrically connected with the pin 3 of the first field effect transistor, the pin 2 is grounded, and the pin 3 is electrically connected with the pins 2 and 4 of the double-P-channel MOS transistor; and pins 5 and 6 of the double-P-channel MOS tube of the second switch control unit are TYPE-C power supply output pins, and pins 7 and 8 are electrically connected with TYPE-C power supply input ends.
4. The switch control circuit of claim 1, wherein the first switch control unit and the second switch control unit each comprise a second transistor and a power supply chip;
a pin 1 of a second triode of the first switch control unit is electrically connected with a C electrode of the first triode, a pin 2 is grounded, and a pin 3 is electrically connected with a pin 4 of the power supply chip; the pins 5, 6, 7 and 8 of the power chip of the first switch control unit are HDMI power output pins, and the pins 1, 2 and 3 are electrically connected with the HDMI power input end;
the pin 1 of the second triode of the second switch control unit is electrically connected with the pin 3 of the first field effect tube, the pin 2 is grounded, and the pin 3 is electrically connected with the pin 4 of the power supply chip; and pins 5, 6, 7 and 8 of the power chip of the second switch control unit are TYPE-C power output pins, and pins 1, 2 and 3 are electrically connected with TYPE-C power input ends.
5. The video converter is characterized by comprising an HDMI video and power input module, a video conversion module and a video output module; the HDMI video and power input module, the video conversion module and the video output module are sequentially in communication connection; the video converter further comprising a switch control circuit as claimed in any one of claims 1 to 4; and the switch control circuit automatically identifies the HDMI power input and TYPE-C power input states and controls the power output to supply power to the video conversion module.
6. A display terminal having the video converter of claim 5 disposed or connected thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320650842.6U CN219329773U (en) | 2023-03-29 | 2023-03-29 | Switch control circuit, video converter and display terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320650842.6U CN219329773U (en) | 2023-03-29 | 2023-03-29 | Switch control circuit, video converter and display terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219329773U true CN219329773U (en) | 2023-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320650842.6U Active CN219329773U (en) | 2023-03-29 | 2023-03-29 | Switch control circuit, video converter and display terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219329773U (en) |
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2023
- 2023-03-29 CN CN202320650842.6U patent/CN219329773U/en active Active
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