CN113665505A - Vehicle-mounted multimedia display system - Google Patents
Vehicle-mounted multimedia display system Download PDFInfo
- Publication number
- CN113665505A CN113665505A CN202110952074.5A CN202110952074A CN113665505A CN 113665505 A CN113665505 A CN 113665505A CN 202110952074 A CN202110952074 A CN 202110952074A CN 113665505 A CN113665505 A CN 113665505A
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- vehicle
- power supply
- circuit
- control circuit
- state
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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
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a vehicle-mounted multimedia display system, which comprises a vehicle-mounted display, a vehicle-mounted power supply, a power supply control circuit and a power supply driving circuit, wherein the vehicle-mounted display is connected with the vehicle-mounted power supply; the power supply control circuit is in communication connection with a vehicle CAN network and is used for generating a first control signal and a second control signal according to CAN network working state data on a vehicle; the power supply driving circuit comprises a power supply circuit and a state control circuit, wherein the power supply circuit is used for supplying power to the vehicle-mounted display; the state control circuit is used for controlling a backlight source in the vehicle-mounted display to be in a working state or a discharging state according to the output state of the vehicle-mounted power supply; moreover, the power supply circuit can also provide a time delay screen-resting time for the vehicle-mounted display; the vehicle-mounted multimedia display system can avoid a vehicle ignition power supply to acquire the working state of the vehicle so as to automatically switch on and off the vehicle-mounted display, and can effectively eliminate the accumulated charges when the vehicle-mounted display is turned off and avoid the short-time screen shaking phenomenon when the vehicle-mounted display is turned on again.
Description
Technical Field
The invention relates to the technical field of multimedia display power supply control, in particular to a vehicle-mounted multimedia display 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, the display screen, which is a core component of the vehicle-mounted display system, is a backlight display device, and the light source device itself used as the backlight has a junction capacitor, so that some charges can be accumulated on the light source device during the standby display process of the display screen.
Disclosure of Invention
The present invention aims to solve the above technical problems and provide a vehicle multimedia display system which can avoid the ignition power supply of the vehicle to obtain the working state of the vehicle, thereby performing automatic on-off control on the vehicle-mounted display and effectively eliminating the accumulated charges when the vehicle-mounted display is shut down.
In order to achieve the aim, the invention discloses a vehicle-mounted multimedia display system which comprises a vehicle-mounted display, a vehicle-mounted power supply, a power supply control circuit and a power supply driving circuit, wherein the vehicle-mounted power supply is connected with the vehicle-mounted display;
the power supply control circuit 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 power supply driving circuit comprises a power supply circuit and a state control circuit, one end of the power supply circuit is electrically connected with the vehicle-mounted power supply, the other end of the power supply circuit is electrically connected with the vehicle-mounted display, and the power supply circuit is used for supplying power to the vehicle-mounted display; one end of the state control circuit is electrically connected with the vehicle-mounted power supply, and the other end of the state control circuit is electrically connected with the vehicle-mounted display and is used for controlling a backlight source in the vehicle-mounted display to be in a working state or a discharging state according to the output state of the vehicle-mounted power supply;
and when the vehicle-mounted power supply is turned off, the power supply circuit can also provide a delay screen-off time for the vehicle-mounted display, and the state control circuit controls the backlight source in the vehicle-mounted display system to be in a discharging state within the delay screen-off time.
Preferably, the power control circuit comprises a differential amplifier and a switch control circuit for signal acquisition and judgment, wherein the non-inverting input end of the differential amplifier is electrically connected with the high-order data line of the CAN network to obtain the 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, an energy storage device for providing the delay screen-off time is arranged in the power supply circuit.
Preferably, the energy storage device comprises a buffer capacitor.
Preferably, the time of delaying screen resting provided by the energy storage device for the display system is 20-30 ms.
Preferably, a diode for preventing reverse flow is arranged between the energy storage device and the vehicle-mounted power supply.
Compared with the prior art, the vehicle-mounted multimedia display system comprises a vehicle-mounted power supply, a power supply control circuit and a power supply driving circuit, wherein the power supply control circuit avoids a vehicle ignition system, obtains 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 the vehicle-mounted power supply, so that the aim of effectively controlling the working state of a vehicle-mounted display is fulfilled; in addition, when the vehicle-mounted power supply is turned off, the power supply control circuit in the power supply driving circuit can provide a delay screen-off time for the vehicle-mounted display, and the backlight source in the vehicle-mounted display system can be controlled to be in a discharging state through the state control circuit in the delay screen-off time, so that electric charges accumulated in the backlight source are eliminated, and the phenomenon of short-time screen shaking during restarting is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a vehicle-mounted multimedia display system according to an embodiment of the present invention.
Fig. 2 is a schematic circuit schematic structure diagram of a power control circuit according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a power driving circuit according to an embodiment of the 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.
Referring to fig. 1, the present embodiment discloses an on-vehicle multimedia display system, which includes an on-vehicle display 10, an on-vehicle power supply 11, a power control circuit 2 and a power driving circuit 3.
And the power supply control circuit 2 is in communication connection with the vehicle CAN network 12 and is used for generating a first control signal corresponding to the CAN network 12 in a data signal transmission state and a second control signal corresponding to the CAN network 12 in an idle state according to the working state data of the CAN network 12 on the vehicle, wherein the first control signal is used for controlling the vehicle-mounted power supply 11 to be turned on, and the second control signal is used for controlling the vehicle-mounted power supply 11 to be turned off. Because the vehicle is when the starting condition, has data signal transmission in CAN network 12, and when the vehicle is in flame-out state, CAN network 12 is in quiescent condition, no longer has data signal transmission, therefore, in this embodiment, CAN judge the current state of vehicle through the data signal transmission state to CAN network 12, 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 power 11. Compared with the method for acquiring signals from the vehicle ignition device, the method for acquiring signals from the CAN network 12 has higher safety, and the vehicle CAN reserve an external interface for the CAN network 12 without changing the overall design of the vehicle, so that the installation and the matching are convenient.
The power driving circuit 3 includes a power supply circuit 30 and a state control circuit 31, one end of the power supply circuit 30 is electrically connected to the vehicle-mounted power source 11, the other end of the power supply circuit 30 is electrically connected to the vehicle-mounted display 10, and the power supply circuit 30 is used for supplying power to the vehicle-mounted display 10. One end of the state control circuit 31 is electrically connected to the vehicle-mounted power supply 11, and the other end of the state control circuit 31 is electrically connected to the vehicle-mounted display 10, and is configured to control a backlight in the vehicle-mounted display 10 to be in an operating state or a discharging state according to an output state of the vehicle-mounted power supply 11. When the vehicle-mounted power supply 11 is turned off, the power supply circuit 30 may provide a delay screen-off time for the vehicle-mounted display 10, and during the delay screen-off time, the state control circuit 31 controls the backlight in the vehicle-mounted display system to be in a discharge state. In the present embodiment, when the in-vehicle power supply 11 is in the normal operation state, the state control circuit 31 outputs a high level so that the backlight is in the operation state. When the voltage of the vehicle-mounted power supply 11 falls below a preset value, the state control circuit 31 outputs a low level to cause the backlight to be in a discharge state. Therefore, when the vehicle-mounted power supply 11 is turned off, the output terminal of the state control circuit 31 is maintained at a low level, and the pin level of the backlight source is pulled down, so that the backlight source is in a discharge state, and thus charges accumulated by the backlight source are effectively removed, and the screen shaking phenomenon is avoided when the vehicle-mounted display 10 is turned on again.
As shown in fig. 2, the power control circuit 2 includes a differential amplifier a1 for signal collection and judgment and a switch control circuit 20, 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 12 to obtain the high-level voltage CAN-H of the CAN network 12; the inverting input end of the differential amplifier A1 is electrically connected with a low-level data line H2 of the CAN network 12 to obtain a low-level voltage CAN-L of the CAN network 12; when the CAN-H is larger than the low-level voltage CAN-L, the differential amplifier A1 outputs a first control signal, and when the high-level voltage CAN-H is equal to the low-level voltage CAN-L, the differential amplifier A1 outputs a second control signal; the output end of the differential amplifier a1 is electrically connected to the switch control circuit 20, and the switch control circuit 20 is electrically connected to the vehicle-mounted power supply 11. In the present embodiment, for the CAN network 12 on the vehicle, when the CAN network 12 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 12 is in the data signal transmission state, the high-order voltage CAN-H is greater than the low-order voltage CAN-L, so in the present embodiment, the high-order voltage CAN-H and the low-order voltage CAN-L of the CAN network 12 are collected and judged by a differential amplifier a1, if the CAN network 12 is in the idle state, the differential amplifier a1 outputs a low voltage (second control signal), and if the CAN network 12 is in the data signal transmission state, the differential amplifier a1 outputs a high level (first control signal). The vehicle-mounted power supply 11 operates in an on state or an off state according to 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 20 through a delay circuit 21, and the delay circuit 21 is configured to extend the duration of the first control signal and the second control signal. Preferably, the delay circuit 21 comprises an RC delay circuit, and the RC delay circuit 21 comprises a delay resistor R6 and a delay capacitor C1 connected in parallel between the output terminal of the differential amplifier a1 and the input terminal of the switch control circuit 20.
Further, the switch control circuit 20 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 and second control signals output from the differential amplifier a1 are amplified in two stages by the first and second three-pole transistors Q1 and Q2 to efficiently drive the in-vehicle display 10. 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 20 from flowing back into the differential amplifier a1, a diode D1 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.
Referring to fig. 3, in another preferred embodiment of the vehicle-mounted multimedia display system of the present invention, an energy storage device C0 for providing the time for delaying screen displaying is disposed in the power supply circuit 30, and the energy storage device C0 is electrically connected to the vehicle-mounted display 10 through the power processing chip 32. In the present embodiment, the state control circuit 31 is preferably a reset integrated circuit 31. When the vehicle-mounted power supply 11 is in an on state, for example, 3.3V, the reset integrated circuit 31 outputs a high level, and then the reset integrated circuit 31 pulls up the pin level of the backlight source to make it in a high level state, thereby controlling the backlight source to be in a normal operating state. When the vehicle-mounted power supply 11 is disconnected or falls below a preset value, the output of the reset integrated circuit 31 is in a low level state, then the reset integrated circuit 31 pulls down the pin level of the backlight source to control the backlight source to be in a discharging state, at this time, due to the action of the energy storage device C0, the vehicle-mounted display screen 10 is still in a screen display state, therefore, the backlight source can execute discharging work, charges accumulated on the backlight source are released through the grounding terminal, after the electric quantity stored by the energy storage device C0 is used up, the discharging of the backlight source is finished, the backlight source is enabled to reach a pure state, and when the vehicle-mounted power supply 11 is recovered again to start the vehicle-mounted display system, the phenomenon of flicker and jitter is effectively avoided.
Specifically, the energy storage device C0 includes a buffer capacitor C0, and the specification of the buffer capacitor C0 in this embodiment is 2200 uF/16V. The energy storage device C0 is the time of delaying screen resting for the on-vehicle display screen provides for 20 ~ 30 ms.
More specifically, in order to prevent the power signal provided by the energy storage device from flowing back to the vehicle-mounted power supply 11 side, a diode D2 for preventing backflow is arranged between the energy storage device and the vehicle.
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 system is characterized by comprising a vehicle-mounted display, a vehicle-mounted power supply, a power supply control circuit and a power supply driving circuit;
the power supply control circuit 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 power supply driving circuit comprises a power supply circuit and a state control circuit, one end of the power supply circuit is electrically connected with the vehicle-mounted power supply, the other end of the power supply circuit is electrically connected with the vehicle-mounted display, and the power supply circuit is used for supplying power to the vehicle-mounted display; one end of the state control circuit is electrically connected with the vehicle-mounted power supply, and the other end of the state control circuit is electrically connected with the vehicle-mounted display and is used for controlling a backlight source in the vehicle-mounted display to be in a working state or a discharging state according to the output state of the vehicle-mounted power supply;
and when the vehicle-mounted power supply is turned off, the power supply circuit can also provide a delay screen-off time for the vehicle-mounted display, and the state control circuit controls the backlight source in the vehicle-mounted display system to be in a discharging state within the delay screen-off time.
2. The vehicle-mounted multimedia display system according to claim 1, wherein the power control circuit comprises a differential amplifier and a switch control circuit 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 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 system according to claim 2, wherein the output terminal 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 in-vehicle multimedia display system of claim 3, wherein the delay circuit comprises an RC delay circuit.
5. The vehicle-mounted multimedia display 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 in-vehicle multimedia display system of 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 system according to claim 1, wherein an energy storage device for providing the delayed screen resting time is arranged in the power supply circuit.
8. The on-board multimedia display system of claim 7, wherein the energy storage device comprises a buffer capacitor.
9. The vehicle-mounted multimedia display system according to claim 7, wherein the delay time for the display system to be stopped by the energy storage device is 20-30 ms.
10. The on-vehicle multimedia display system of claim 7, wherein a diode for preventing reverse flow is disposed between the energy storage device and the on-vehicle power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110952074.5A CN113665505B (en) | 2021-08-18 | 2021-08-18 | Vehicle-mounted multimedia display system based on CAN network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110952074.5A CN113665505B (en) | 2021-08-18 | 2021-08-18 | Vehicle-mounted multimedia display system based on CAN network |
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| CN113665505A true CN113665505A (en) | 2021-11-19 |
| CN113665505B CN113665505B (en) | 2023-08-29 |
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| WO2021033677A1 (en) * | 2019-08-21 | 2021-02-25 | 日本精機株式会社 | Vehicular display device |
| CN112838971A (en) * | 2019-11-22 | 2021-05-25 | 恩智浦有限公司 | CAN communication under cable breaking condition |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5170491A (en) * | 1988-05-13 | 1992-12-08 | Nec Corporation | Power source switch circuit |
| JPH0823641A (en) * | 1994-07-06 | 1996-01-23 | Kenwood Corp | Circuit for controlling output of car audio equipment |
| JPH08216800A (en) * | 1995-01-31 | 1996-08-27 | Fms Audio Sdn Bhd | Power-supply device of car audio |
| JPH10220329A (en) * | 1997-02-07 | 1998-08-18 | Jeco Co Ltd | On-vehicle display device |
| JP2010051054A (en) * | 2008-08-19 | 2010-03-04 | Yazaki Corp | Display system |
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| JP2014104937A (en) * | 2012-11-29 | 2014-06-09 | Denso Corp | Electronic controller |
| WO2020022387A1 (en) * | 2018-07-26 | 2020-01-30 | 日置電機株式会社 | Signal generation device and signal reading system |
| CN211032453U (en) * | 2019-08-12 | 2020-07-17 | 深圳市锐明技术股份有限公司 | Power-down delay protection circuit applied to camera and vehicle-mounted equipment |
| WO2021033677A1 (en) * | 2019-08-21 | 2021-02-25 | 日本精機株式会社 | Vehicular display device |
| CN112838971A (en) * | 2019-11-22 | 2021-05-25 | 恩智浦有限公司 | CAN communication under cable breaking condition |
| GB202007397D0 (en) * | 2020-05-19 | 2020-07-01 | Vitesco Tech Gmbh | Device and method for detecting termination in communication unit in vehicle |
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| Publication number | Publication date |
|---|---|
| CN113665505B (en) | 2023-08-29 |
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