CN113696842A - Vehicle-mounted multimedia display power supply and transmission control system - Google Patents
Vehicle-mounted multimedia display power supply and transmission control system Download PDFInfo
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- CN113696842A CN113696842A CN202110952073.0A CN202110952073A CN113696842A CN 113696842 A CN113696842 A CN 113696842A CN 202110952073 A CN202110952073 A CN 202110952073A CN 113696842 A CN113696842 A CN 113696842A
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- vehicle
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- power supply
- control system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a vehicle-mounted multimedia display power supply and transmission control system, which comprises a signal transmission control system and a power supply control system, wherein the power supply control system is in communication connection with a vehicle CAN network and is used for generating a first control signal corresponding to the CAN network in a data signal transmission state and a second control signal corresponding to the CAN network in an idle state according to CAN network working state data on a vehicle; the signal transmission control system comprises a coaxial signal line and an isolation transformer, wherein the coaxial signal line is used for connecting a signal connecting end of the host and the signal connecting end of the vehicle-mounted display, and the isolation transformer is arranged at the signal connecting end of the host or the signal connecting end of the vehicle-mounted display; the vehicle-mounted multimedia display power supply and the transmission control system CAN avoid a vehicle ignition power supply to acquire the working state of the vehicle from the CAN network, and CAN effectively avoid the direct current impact signal at one side of the vehicle-mounted display from being discharged through one side of the host computer so as to avoid the damage to the host computer.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted multimedia electric signal control, in particular to a vehicle-mounted multimedia display power supply and a transmission control system.
Background
At present, a vehicle-mounted multimedia display system is generally configured on an automobile to play navigation, music, entertainment videos and the like, so that the automobile using experience of a user is greatly enriched. The vehicle-mounted display system is a power-consuming consumer of the vehicle peripheral equipment, and generally requires that the working state of the vehicle-mounted display system follows the working state of the vehicle, namely when the vehicle is in a starting state, the vehicle-mounted display system is in a starting or starting-waiting state, and when the vehicle is in a flameout state, the vehicle-mounted display system is automatically closed, so that a vehicle-mounted power supply is saved, and the vehicle-mounted battery is prevented from being excessively consumed. In the prior art, for convenience, the vehicle-mounted display system generally directly acquires a vehicle state signal from an ignition device of a vehicle to control the working state of the vehicle-mounted display system, however, under the requirement of overall safety and stability of the vehicle, some vehicle design and self-assembly companies may put high requirements on a service provider of the vehicle-mounted display system, and the vehicle-mounted display system is required not to acquire the signal from the ignition device, so that a new vehicle state detection method is required to safely and effectively control the working state of the vehicle-mounted display system. In addition, in the prior art, video signal transmission is performed between a host and a vehicle-mounted display in a general vehicle-mounted display system through a coaxial signal line, the host and the vehicle-mounted display are both connected with a common ground terminal of a vehicle, and direct current ground terminals of the host and the vehicle-mounted display are directly connected together while being connected through the coaxial signal line, so that when a direct current impact signal with larger current appears at one end of the vehicle-mounted display, one end of the host with smaller ground resistance can be selected to reach the common ground terminal of the vehicle by the impact signal, and the host is easily burnt out.
Disclosure of Invention
The present invention is directed to solve the above problems and to provide a vehicle multimedia display power supply and transmission control system, which can avoid the vehicle ignition power supply to obtain the vehicle operating state, so as to perform automatic on-off control on the vehicle-mounted display, and can isolate the host from the ground of the display in the vehicle-mounted multimedia display system.
In order to achieve the purpose, the invention discloses a vehicle-mounted multimedia display power supply and transmission control system, which is characterized by comprising a signal transmission control system and a power supply control system, wherein the signal transmission control system is used for controlling the signal transmission between a vehicle-mounted display and a host computer, and the power supply control system is used for controlling the power supply of the vehicle-mounted display and the host computer;
the power supply control system is in communication connection with a vehicle CAN network and is used for generating a first control signal corresponding to the CAN network in a data signal transmission state and a second control signal corresponding to the CAN network in an idle state according to CAN network working state data on a vehicle, wherein the first control signal is used for controlling the vehicle-mounted power supply to be turned on, and the second control signal is used for controlling the vehicle-mounted power supply to be turned off;
the signal transmission control system comprises a coaxial signal line and an isolation transformer, wherein the coaxial signal line is used for connecting a signal connecting end of the host and the vehicle-mounted display, the isolation transformer is arranged at the signal connecting end of the host or the vehicle-mounted display so as to enable a video signal on the coaxial signal line to be transmitted through the isolation transformer, a first grounding end positioned at an interface at one side and a second grounding end positioned at an interface at the other side are arranged on the isolation transformer, the first grounding end is electrically connected with the grounding end of one of the host and the vehicle-mounted display, and the second grounding end is electrically connected with the grounding end of the other of the host and the vehicle-mounted display.
Preferably, the power supply control system comprises a differential amplifier and a switch control circuit, wherein the differential amplifier is used for signal acquisition and judgment, and a non-inverting input end of the differential amplifier is electrically connected with a high-order data line of the CAN network so as to obtain a high-order voltage of the CAN network; the inverting input end of the differential amplifier is electrically connected with the low-level data line of the CAN network to obtain the low-level voltage of the CAN network; when the high-order voltage is greater than the low-order voltage, the differential amplifier outputs the first control signal, and when the high-order voltage is equal to the low-order voltage, the differential amplifier outputs the second control signal; the output end of the differential amplifier is electrically connected with the switch control circuit, and the switch control circuit is electrically connected with the vehicle-mounted power supply.
Preferably, the output end of the differential amplifier is electrically connected to the switch control circuit through a delay circuit, and the delay circuit is configured to prolong the duration of the first control signal and the second control signal.
Preferably, the delay circuit includes an RC delay circuit.
Preferably, the switch control circuit includes a first three-pole transistor and a second three-pole transistor connected in series, and the first three-pole transistor and the second three-pole transistor are used for amplifying and outputting the signal output by the differential amplifier.
Preferably, the first triode transistor is an MOS transistor, and the second triode transistor is a triode.
Preferably, the signal connection end of the host or the vehicle-mounted display is further provided with an isolation capacitor.
Preferably, the signal transmission control system further includes a common mode filter circuit disposed at a signal connection end of the host or the vehicle-mounted display.
Preferably, the coaxial signal line is further connected with a static suppression device.
Preferably, the static electricity suppressing device includes a static diode.
Compared with the prior art, the vehicle-mounted multimedia display power supply and transmission control system comprises a signal transmission control system and a power supply control system, wherein the power supply control system avoids a vehicle ignition system, acquires a vehicle working state signal from a CAN (controller area network) on a vehicle, and generates a first control signal and a second control signal for controlling the on/off of a vehicle-mounted power supply, so that the aim of effectively controlling the working state of a vehicle-mounted display is fulfilled; in addition, because the signal connection end of the host computer or the vehicle-mounted display is also provided with an isolation transformer, and the video signal belongs to an alternating current signal, the coaxial signal line can transmit the video signal through the isolation transformer, and the direct current impact signal positioned on one side of the vehicle-mounted display cannot pass through the isolation transformer, so that the direct current impact signal on one side of the vehicle-mounted display can be effectively prevented from being discharged through one side of the host computer, and further the host computer is prevented from being damaged.
Drawings
Fig. 1 is a schematic circuit schematic structural diagram of a signal transmission control system according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a power supply control system according to an embodiment of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The embodiment discloses a vehicle-mounted multimedia display power supply and transmission control system, which comprises a signal transmission control system and a power supply control system. The signal transmission control system is used for controlling signal transmission between the vehicle-mounted display and the host, and the power supply control system is used for controlling power supply of the vehicle-mounted display and the host.
Specifically, the power supply control system is in communication connection with a vehicle CAN network and is used for generating a first control signal corresponding to the CAN network being in a data signal transmission state and a second control signal corresponding to the CAN network being in an idle state according to CAN network working state data on the vehicle, wherein the first control signal is used for controlling the vehicle-mounted power supply to be turned on, and the second control signal is used for controlling the vehicle-mounted power supply to be turned off. In this embodiment, because the vehicle is when starting the state, has data signal transmission in the CAN network, and when the vehicle was in flame-out state, the CAN network was in quiescent condition, no longer had data signal transmission, therefore, in this embodiment, CAN judge the current state of vehicle through the data signal transmission state to in the CAN network, and then generate the first control signal and the second control signal that are used for controlling the mobile unit, reach the purpose of effective control vehicle mounted power. Compared with the method for acquiring signals from the vehicle ignition device, the method for acquiring signals from the CAN network has the advantages that the safety is higher, the vehicle CAN reserve an external interface for the CAN network, the overall design of the vehicle does not need to be changed, and the installation and the matching are convenient.
Referring to fig. 1, the signal transmission control system includes a coaxial signal line 20 and an isolation transformer 21, the coaxial signal line 20 is used for connecting signal connection terminals of the host 11 and the vehicle-mounted display, the isolation transformer 21 is disposed at the signal connection terminal of the host 11 or the vehicle-mounted display, so that the video signal on the coaxial signal line 20 is transmitted through the isolation transformer 21, the isolation transformer 21 is provided with a first ground terminal GND1 located at one side interface and a second ground terminal GND2 located at the other side interface, the first ground terminal GND1 is electrically connected to a ground terminal of one of the host 11 and the vehicle-mounted display, and the second ground terminal GND2 is electrically connected to a ground terminal of the other one of the host 11 and the vehicle-mounted display. In the present embodiment, since the isolation transformer 21 has the characteristics of passing ac and blocking dc, the ac video signal can be transmitted through the coaxial signal line 20 without hindrance, and the dc impact signal cannot pass through the isolation transformer 21, and therefore cannot enter the host 11 from the side of the in-vehicle display or enter the in-vehicle display from the side of the host 11 through the coaxial signal line 20. Specifically, when the ground terminal of the on-board display is connected to the second ground terminal GND2 of the isolation transformer 21, since the impedance to ground of the on-board display is relatively large, when an impact signal with a dc attribute is generated on one side of the on-board display, the impact signal cannot enter the host 11 through the isolation transformer 21, and can only reach the common ground terminal of the vehicle through the second ground terminal GND2 close to one side of the on-board display, so that the impact signal on one side of the on-board display is prevented from affecting the host 11, and the service life of the host 11 is effectively prolonged. Preferably, the signal connection terminal of the host 11 or the vehicle-mounted display is further provided with an isolation capacitor C0, so as to further prevent the transmission of the dc impact signal between the host 11 and the vehicle-mounted display through the coaxial signal line 20.
Preferably, as shown in fig. 1, to better avoid the noise signal from interfering with the video signal in the coaxial signal line 20, the communication connection circuit further includes a common mode filter circuit 22 disposed at the signal connection end of the host 11 or the display screen to filter the common mode interference signal of the coaxial signal line 20. Specifically, the common mode filter circuit 22 includes a common mode inductor L1 connected in series to the coaxial signal line 20 and a common mode capacitor C1 connected in parallel to the coaxial signal line 20.
In addition, in order to prevent static electricity from interfering with the video signal transmitted through the coaxial signal line 20, a static electricity suppressing device is connected to the coaxial signal line 20. Specifically, the static electricity suppressing device includes a static diode D1.
Further, as shown in fig. 2, the power supply control system includes a differential amplifier a1 for signal collection and judgment and a switch control circuit 30, wherein the non-inverting input terminal of the differential amplifier a1 is electrically connected to the high-level data line H1 of the CAN network to obtain the high-level voltage CAN-H of the CAN network; the inverting input end of the differential amplifier A1 is electrically connected with a low-level data line H2 of the CAN network to obtain a low-level voltage CAN-L of the CAN network; when the high-order voltage CAN-H is larger than the low-order voltage CAN-L, the differential amplifier A1 outputs a first control signal, and when the high-order voltage CAN-H is equal to the low-order voltage CAN-L, the differential amplifier A1 outputs a second control signal; the output end of the differential amplifier a1 is electrically connected with the switch control circuit 30, and the switch control circuit 30 is electrically connected with the vehicle-mounted power supply. In this embodiment, for the CAN network on the vehicle, when the CAN network is in the idle state, the high-order voltage CAN-H is equal to the low-order voltage CAN-L, and when the CAN network is in the data signal transmission state, the high-order voltage CAN-H is greater than the low-order voltage CAN, so in this embodiment, the high-order voltage CAN-H and the low-order voltage CAN-L of the CAN network are collected and judged by a differential amplifier a1, if the CAN network is in the idle state, the differential amplifier a1 outputs a low voltage (second control signal), and if the CAN network is in the data signal transmission state, the differential amplifier a1 outputs a high level (first control signal). The vehicle-mounted power supply operates in an on state or an off state in accordance with the output of the differential amplifier a 1. More specifically, the high-order voltage CAN-H and the low-order voltage CAN-L enter the differential amplifier a1 through the current-limiting resistors R1 and R2, respectively, the non-inverting input terminal of the differential amplifier a1 is further electrically connected with a grounding resistor R3, and a feedback resistor R4 is further electrically connected between the output terminal and the inverting input terminal of the differential amplifier a 1.
Further, the output terminal of the differential amplifier a1 is electrically connected to the switch control circuit 30 through a delay circuit 31, and the delay circuit 31 is configured to extend the duration of the first control signal and the second control signal. Preferably, the delay circuit 31 comprises an RC delay circuit. In bulk, the RC delay circuit includes a delay resistor R6 and a delay capacitor C2 connected in parallel between the output of the differential amplifier a1 and the input of the switch control circuit 30.
Further, the switch control circuit 30 includes a first three-pole transistor Q1 and a second three-pole transistor Q2 connected in series, and the first three-pole transistor Q1 and the second three-pole transistor Q2 are used for amplifying and outputting the signal output by the differential amplifier a 1. In the present embodiment, the first control signal and the second control signal output from the differential amplifier a1 are amplified in two stages by the first three-pole transistor Q1 and the second three-pole transistor Q2 to efficiently drive the in-vehicle display. Specifically, the first triode transistor Q1 is a MOS transistor, and the second triode transistor Q2 is a triode. More specifically, a current limiting resistor R7, R8 is provided between the first triode transistor Q1 and the power supply, and at the same time, the current limiting resistor R8 is a current limiting resistor between the second triode transistor Q2 and the power supply, and the signal output by the first triode transistor Q1 reaches the second triode transistor Q2 through the current limiting resistor R7. In addition, in order to prevent the electrical signal in the switch control circuit 30 from flowing back into the differential amplifier a1, a diode D2 and a current-limiting resistor R5 are connected in series between the first three-pole transistor Q1 and the output terminal of the differential amplifier a 1. Furthermore, the output end of the second three-pole transistor Q2 is also provided with a light emitting diode LED1 for signal indication.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. A vehicle-mounted multimedia display power supply and transmission control system is characterized by comprising a signal transmission control system and a power supply control system, wherein the signal transmission control system is used for controlling signal transmission between a vehicle-mounted display and a host computer, and the power supply control system is used for controlling power supply of the vehicle-mounted display and the host computer;
the power supply control system is in communication connection with a vehicle CAN network and is used for generating a first control signal corresponding to the CAN network in a data signal transmission state and a second control signal corresponding to the CAN network in an idle state according to CAN network working state data on a vehicle, wherein the first control signal is used for controlling the vehicle-mounted power supply to be turned on, and the second control signal is used for controlling the vehicle-mounted power supply to be turned off;
the signal transmission control system comprises a coaxial signal line and an isolation transformer, wherein the coaxial signal line is used for connecting a signal connecting end of the host and the vehicle-mounted display, the isolation transformer is arranged at the signal connecting end of the host or the vehicle-mounted display so as to enable a video signal on the coaxial signal line to be transmitted through the isolation transformer, a first grounding end positioned at an interface at one side and a second grounding end positioned at an interface at the other side are arranged on the isolation transformer, the first grounding end is electrically connected with the grounding end of one of the host and the vehicle-mounted display, and the second grounding end is electrically connected with the grounding end of the other of the host and the vehicle-mounted display.
2. The vehicle-mounted multimedia display power supply and transmission control system according to claim 1, wherein the power supply control system comprises a differential amplifier and a switch control circuit for signal acquisition and judgment, and a non-inverting input terminal of the differential amplifier is electrically connected with a high-order data line of the CAN network to obtain a high-order voltage of the CAN network; the inverting input end of the differential amplifier is electrically connected with the low-level data line of the CAN network to obtain the low-level voltage of the CAN network; when the high-order voltage is greater than the low-order voltage, the differential amplifier outputs the first control signal, and when the high-order voltage is equal to the low-order voltage, the differential amplifier outputs the second control signal; the output end of the differential amplifier is electrically connected with the switch control circuit, and the switch control circuit is electrically connected with the vehicle-mounted power supply.
3. The vehicle-mounted multimedia display power supply and transmission control system according to claim 2, wherein the output end of the differential amplifier is electrically connected to the switch control circuit through a delay circuit, and the delay circuit is configured to extend the duration of the first control signal and the second control signal.
4. The vehicle-mounted multimedia display power supply and transmission control system according to claim 3, wherein the delay circuit comprises an RC delay circuit.
5. The vehicle-mounted multimedia display power supply and transmission control system according to claim 3, wherein the switch control circuit comprises a first three-pole transistor and a second three-pole transistor connected in series, and the first three-pole transistor and the second three-pole transistor are used for amplifying and outputting the signal output by the differential amplifier.
6. The vehicle-mounted multimedia display power supply and transmission control system according to claim 5, wherein the first triode transistor is a MOS transistor, and the second triode transistor is a triode.
7. The vehicle-mounted multimedia display power supply and transmission control system according to claim 1, wherein an isolation capacitor is further disposed at a signal connection end of the host or the vehicle-mounted display.
8. The vehicle-mounted multimedia display power supply and transmission control system according to claim 1, wherein the signal transmission control system further comprises a common mode filter circuit disposed at a signal connection terminal of the host or the vehicle-mounted display.
9. The on-vehicle multimedia display power supply and transmission control system according to claim 1, wherein a static suppression device is further connected to the coaxial signal line.
10. The on-vehicle multimedia display power supply and transmission control system according to claim 9, wherein the static electricity suppressing device comprises a static electricity diode.
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| CN202110952073.0A CN113696842B (en) | 2021-08-18 | 2021-08-18 | Multimedia display power supply and transmission control system based on CAN network |
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| CN202110952073.0A CN113696842B (en) | 2021-08-18 | 2021-08-18 | Multimedia display power supply and transmission control system based on CAN network |
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| CN113696842B CN113696842B (en) | 2023-07-04 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10220329A (en) * | 1997-02-07 | 1998-08-18 | Jeco Co Ltd | On-vehicle display device |
| JP2014104937A (en) * | 2012-11-29 | 2014-06-09 | Denso Corp | Electronic controller |
| US20160159296A1 (en) * | 2013-07-24 | 2016-06-09 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt | Circuit module for isolating components of a multi-voltage vehicle electrical system |
| CN107021035A (en) * | 2017-03-24 | 2017-08-08 | 青岛海信电器股份有限公司 | Vehicular display device and in-vehicle display system |
| CN108995612A (en) * | 2018-08-03 | 2018-12-14 | 中国汽车工程研究院股份有限公司 | A kind of new-energy automobile CAN bus signal resolution circuit, system and method |
| CN109050444A (en) * | 2018-09-28 | 2018-12-21 | 深圳市道通科技股份有限公司 | CAN circuit structure and its vehicle diagnostic equipment |
| CN208656767U (en) * | 2018-06-15 | 2019-03-26 | 贵阳耘志电子技术有限公司 | A kind of intelligent monitor system |
| CN111806341A (en) * | 2020-06-22 | 2020-10-23 | 淮阴师范学院 | Isolated form car atmosphere lamp controller based on CAN communication |
| CN112218788A (en) * | 2018-06-13 | 2021-01-12 | 株式会社自动网络技术研究所 | In-vehicle power supply control device and in-vehicle power supply system |
| CN112838971A (en) * | 2019-11-22 | 2021-05-25 | 恩智浦有限公司 | CAN communication under cable breaking condition |
| CN112937464A (en) * | 2021-05-17 | 2021-06-11 | 湖北亿咖通科技有限公司 | Vehicle-mounted display system, power supply control method, control host and display |
-
2021
- 2021-08-18 CN CN202110952073.0A patent/CN113696842B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10220329A (en) * | 1997-02-07 | 1998-08-18 | Jeco Co Ltd | On-vehicle display device |
| JP2014104937A (en) * | 2012-11-29 | 2014-06-09 | Denso Corp | Electronic controller |
| US20160159296A1 (en) * | 2013-07-24 | 2016-06-09 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt | Circuit module for isolating components of a multi-voltage vehicle electrical system |
| CN107021035A (en) * | 2017-03-24 | 2017-08-08 | 青岛海信电器股份有限公司 | Vehicular display device and in-vehicle display system |
| CN112218788A (en) * | 2018-06-13 | 2021-01-12 | 株式会社自动网络技术研究所 | In-vehicle power supply control device and in-vehicle power supply system |
| CN208656767U (en) * | 2018-06-15 | 2019-03-26 | 贵阳耘志电子技术有限公司 | A kind of intelligent monitor system |
| CN108995612A (en) * | 2018-08-03 | 2018-12-14 | 中国汽车工程研究院股份有限公司 | A kind of new-energy automobile CAN bus signal resolution circuit, system and method |
| CN109050444A (en) * | 2018-09-28 | 2018-12-21 | 深圳市道通科技股份有限公司 | CAN circuit structure and its vehicle diagnostic equipment |
| CN112838971A (en) * | 2019-11-22 | 2021-05-25 | 恩智浦有限公司 | CAN communication under cable breaking condition |
| CN111806341A (en) * | 2020-06-22 | 2020-10-23 | 淮阴师范学院 | Isolated form car atmosphere lamp controller based on CAN communication |
| CN112937464A (en) * | 2021-05-17 | 2021-06-11 | 湖北亿咖通科技有限公司 | Vehicle-mounted display system, power supply control method, control host and display |
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| CN113696842B (en) | 2023-07-04 |
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