CN113665505B - Vehicle-mounted multimedia display system based on CAN network - Google Patents
Vehicle-mounted multimedia display system based on CAN network Download PDFInfo
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- CN113665505B CN113665505B CN202110952074.5A CN202110952074A CN113665505B CN 113665505 B CN113665505 B CN 113665505B CN 202110952074 A CN202110952074 A CN 202110952074A CN 113665505 B CN113665505 B CN 113665505B
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- vehicle
- power supply
- network
- circuit
- control circuit
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Classifications
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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
-
- 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 based on a CAN network, which comprises 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 the 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 the vehicle; the power supply drive circuit comprises a power supply circuit and a state control circuit, and the power supply circuit is used for supplying power to the vehicle-mounted display; the state control circuit is used for controlling the 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; the power supply circuit can also provide a delay screen-off time for the vehicle-mounted display; the vehicle-mounted multimedia display system can not only avoid the ignition power supply of the vehicle to acquire the working state of the vehicle so as to automatically switch and control the vehicle-mounted display, but also effectively eliminate the accumulated charges of the vehicle-mounted display when the vehicle-mounted display is powered off and avoid the phenomenon of short-time screen shaking when the vehicle-mounted display is powered 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 based on a CAN network.
Background
At present, an on-vehicle multimedia display system is generally configured on an automobile and is used for playing navigation, music, entertainment videos and the like, so that the automobile use experience of a user is greatly enriched. The vehicle-mounted display system is a power consumption user outside the vehicle, generally requires that the working state of the vehicle is required to follow 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 to-be-started state, and when the vehicle is flameout, the vehicle-mounted display system is required to be automatically closed, so that the vehicle-mounted power supply is saved, and the excessive consumption of the vehicle-mounted battery is avoided. 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 so as to control the working state of the vehicle-mounted display system, but in the requirements of overall safety and stability of the vehicle, some vehicle design and service providers can put forward higher requirements on the vehicle-mounted display system, and the vehicle-mounted display system cannot acquire the signal from the ignition device, so that a new vehicle state detection method is needed to safely and effectively control the working state of the vehicle-mounted display system. In addition, as a core component display screen of the vehicle-mounted display system is a backlight display device, the light source device used as the backlight source has junction capacitance, so that the display screen can accumulate some charges on the light source device in the standby display process, when the main power supply of the display system is disconnected, the display screen is immediately in a screen-off state, at the moment, the charges accumulated on the light source device in the display screen cannot be released, and the phenomenon of screen flicker and shake of different degrees occurs when the display screen is started again, therefore, the power supply driving circuit of the vehicle-mounted display system needs to be improved to avoid the phenomenon.
Disclosure of Invention
The invention aims to solve the technical problems and provide the vehicle-mounted multimedia display system based on the CAN network, which CAN avoid the ignition power supply of the vehicle to acquire the working state of the vehicle, thus automatically controlling the on-off of the vehicle-mounted display and simultaneously effectively eliminating the accumulated charges when the vehicle-mounted display is powered off.
In order to achieve the above purpose, the invention discloses a vehicle-mounted multimedia display system based on a CAN network, which comprises 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 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;
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 discharge state in the delay screen-off time.
Preferably, the power supply control circuit comprises a differential amplifier and a switch control circuit, wherein the differential amplifier is used for signal acquisition and judgment, and the non-inverting input end of the differential amplifier is electrically connected with a high-order data line of the CAN network so as to acquire the high-order voltage of the CAN network; the inverting input end of the differential amplifier is electrically connected with a low-level data line of the CAN network to obtain low-level voltage of the CAN network; the differential amplifier outputs the first control signal when the high voltage is greater than the low voltage, and outputs the second control signal when the high voltage is equal to the low voltage; 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 with the switch control circuit through a delay circuit, and the delay circuit is used for prolonging the duration time of the first control signal and the second control signal.
Preferably, the delay circuit comprises an RC delay circuit.
Preferably, the switch control circuit includes a first triode transistor and a second triode transistor connected in series, and the first triode transistor and the second triode transistor are used for amplifying and outputting signals output by the differential amplifier.
Preferably, the first triode is a MOS transistor, and the second triode is a triode.
Preferably, an energy storage device for providing the delay screen time is arranged in the power supply circuit.
Preferably, the energy storage device comprises a buffer capacitor.
Preferably, the delay screen-off time provided by the energy storage device for the display system is 20-30 ms.
Preferably, a diode for preventing backflow is arranged between the energy storage device and the vehicle-mounted power supply.
Compared with the prior art, the vehicle-mounted multimedia display system based on the CAN network 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, and acquires a vehicle working state signal from the CAN network on the vehicle so as to generate a first control signal and a second control signal for controlling the on/off of the vehicle-mounted power supply, thereby achieving the purpose of effectively controlling the working state of a vehicle-mounted display; 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 discharge state through the state control circuit in the delay screen-off time, so that charges accumulated in the backlight source are eliminated, and a short-time screen shaking phenomenon is avoided when the vehicle-mounted display is turned on again.
Drawings
Fig. 1 is a schematic structural diagram of an on-vehicle multimedia display system according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a power control circuit according to an embodiment of the invention.
Fig. 3 is a schematic diagram of a power driving circuit according to an embodiment of the invention.
Detailed Description
In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.
In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.
As shown in fig. 1, the present embodiment discloses a vehicle-mounted multimedia display system, which includes a vehicle-mounted display 10, a vehicle-mounted power supply 11, a power supply control circuit 2, and a power supply driving circuit 3.
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 on-vehicle power supply 11 to be turned on, and the second control signal is used for controlling the on-vehicle power supply 11 to be turned off. Because the data signal is transmitted in the CAN network 12 when the vehicle is in the start state, and the CAN network 12 is in the rest state when the vehicle is in the flameout state, no data signal is transmitted any more, in this embodiment, the current state of the vehicle CAN be determined by the data signal transmission state in the CAN network 12, and further, the first control signal and the second control signal for controlling the vehicle-mounted device are generated, so as to achieve the purpose of effectively controlling the vehicle-mounted power supply 11. Compared with the signal obtained from the vehicle ignition device, the signal obtained from the CAN network 12 has higher safety, and the vehicle reserves a peripheral interface for the CAN network 12 without changing the overall design of the vehicle, thereby being convenient to install and cooperate.
The power supply driving circuit 3 includes a power supply circuit 30 and a state control circuit 31, wherein one end of the power supply circuit 30 is electrically connected with the vehicle-mounted power supply 11, the other end of the power supply circuit 30 is electrically connected with 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 with the vehicle-mounted power supply 11, and the other end of the state control circuit 31 is electrically connected with the vehicle-mounted display 10 and is used for controlling the backlight source in the vehicle-mounted display 10 to be in a working state or a discharging state according to the output state of the vehicle-mounted power supply 11. When the vehicle power supply 11 is turned off, the power supply circuit 30 may provide a delay off-screen time for the vehicle display 10, and the state control circuit 31 controls the backlight source in the vehicle display system to be in a discharge state during the delay off-screen time. 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 in-vehicle power supply 11 falls below the preset value, the state control circuit 31 outputs a low level so that the backlight is in a discharge state. Therefore, when the vehicle-mounted power supply 11 is turned off, the output end 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 the accumulated charges of the backlight source are effectively removed, and the screen shaking phenomenon of the vehicle-mounted display 10 when the vehicle-mounted display is turned on again is avoided.
As shown in fig. 2, the power control circuit 2 includes a differential amplifier A1 for signal acquisition and judgment and a switch control circuit 20, wherein the non-inverting input terminal of the differential amplifier A1 is electrically connected with a high-order bit data line H1 of the CAN network 12 to obtain a high-order voltage CAN-H of the CAN network 12; the inverting input end of the differential amplifier A1 is electrically connected with a low-bit data line H2 of the CAN network 12 to obtain a low-bit 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 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, and therefore, 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 the low voltage (second control signal), and if the CAN network 12 is in the data signal transmission state, the differential amplifier A1 outputs the high level (first control signal). The in-vehicle power supply 11 operates in an on state or an off state according to the output of the differential amplifier A1. More specifically, the high-order voltage CAN-H and the low-order voltage CAN-L respectively enter the differential amplifier A1 through the current limiting resistors R1 and R2, the non-inverting input end 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 end and the inverting input end of the differential amplifier A1.
Further, the output end 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 used for prolonging 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 transistor Q1 and a second transistor Q2 connected in series, and the first transistor Q1 and the second transistor Q2 are configured to amplify and output a signal output by the differential amplifier A1. In this embodiment, the first control signal and the second control signal output by the differential amplifier A1 are amplified in two stages by the first transistor Q1 and the second transistor Q2, so as to effectively drive the in-vehicle display 10. Specifically, the first transistor Q1 is a MOS transistor, and the second transistor Q2 is a triode. More specifically, current limiting resistors R7 and R8 are disposed between the first transistor Q1 and the power supply, and meanwhile, the current limiting resistor R8 is a current limiting resistor between the second transistor Q2 and the power supply, and a signal output by the first transistor Q1 reaches the second transistor Q2 through the current limiting resistor R7. In addition, in order to avoid the electric 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 triode transistor Q1 and the output terminal of the differential amplifier A1. Furthermore, the output end of the second triode transistor Q2 is further provided with a light emitting diode LED1 for signal indication.
In another preferred embodiment of the vehicle-mounted multimedia display system of the present invention, as shown in fig. 3, an energy storage device C0 for providing a delayed screen time 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 this embodiment, the state control circuit 31 is preferably a reset integrated circuit 31. When the vehicle 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 to be in a high level state, so as to control the backlight to be in a normal working 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 pin level of the backlight source is pulled down by the reset integrated circuit 31, the backlight source is controlled to be in a discharging state, at the moment, the vehicle-mounted display screen 10 is still in a screen display state due to the action of the energy storage device C0, so that the backlight source can perform discharging work, charges accumulated on the backlight source can be released through the grounding end, after the electric quantity stored by the energy storage device C0 is used up, the discharging of the backlight source is ended, the backlight source is in 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 shake is effectively avoided.
Specifically, the energy storage device C0 includes a buffer capacitor C0, and the size of the buffer capacitor C0 in this embodiment is 2200uF/16V. The delay screen-extinguishing time provided by the energy storage device C0 for the vehicle-mounted display screen is 20-30 ms.
More specifically, in order to avoid the backflow of the power signal provided by the energy storage device to the vehicle power supply 11, a diode D2 for preventing backflow is disposed between the energy storage device and the vehicle.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (9)
1. The vehicle-mounted multimedia display system based on the CAN network 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 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;
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;
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 discharge state in the delay screen-off time; the power supply control circuit comprises a differential amplifier and a switch control circuit, wherein the differential amplifier is used for signal acquisition and judgment, and the non-inverting input end of the differential amplifier is electrically connected with a high-order data line of the CAN network to acquire the high-order voltage of the CAN network; the inverting input end of the differential amplifier is electrically connected with a low-level data line of the CAN network to obtain low-level voltage of the CAN network; the differential amplifier outputs the first control signal when the high voltage is greater than the low voltage, and outputs the second control signal when the high voltage is equal to the low voltage; 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.
2. The CAN network-based vehicle-mounted multimedia display system of claim 1, wherein the output of the differential amplifier is electrically connected to the switch control circuit through a delay circuit, the delay circuit being configured to extend the duration of the first control signal and the second control signal.
3. The CAN network based on-vehicle multimedia display system of claim 2, wherein the delay circuit comprises an RC delay circuit.
4. The CAN network-based vehicle-mounted multimedia display system of claim 2, wherein the switch control circuit comprises a first transistor and a second transistor connected in series, the first transistor and the second transistor being configured to amplify and output the signal output by the differential amplifier.
5. The CAN network based vehicle multimedia display system of claim 4, wherein the first transistor is a MOS transistor and the second transistor is a transistor.
6. The CAN network-based vehicle-mounted multimedia display system according to claim 1, wherein an energy storage device for providing the time delay off-screen time is provided in the power supply circuit.
7. The CAN network-based vehicle multimedia display system of claim 6, wherein the energy storage means comprises a buffer capacitor.
8. The CAN network-based vehicle-mounted multimedia display system of claim 6, wherein the energy storage device provides the display system with a time delay of 20-30 ms.
9. The CAN-network-based vehicle-mounted multimedia display system of claim 6, wherein a diode for preventing reverse flow is disposed between the energy storage device and the vehicle-mounted power source.
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| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| CN202110952074.5A CN113665505B (en) | 2021-08-18 | 2021-08-18 | Vehicle-mounted multimedia display system based on CAN network |
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| CN113665505A CN113665505A (en) | 2021-11-19 |
| CN113665505B true CN113665505B (en) | 2023-08-29 |
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Citations (13)
| 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 |
| JP2012148717A (en) * | 2011-01-20 | 2012-08-09 | Yupiteru Corp | Power supply control device |
| CN102842292A (en) * | 2011-06-24 | 2012-12-26 | 鸿富锦精密工业（深圳）有限公司 | Power supply management circuit and display device using same |
| 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 |
| GB202007397D0 (en) * | 2020-05-19 | 2020-07-01 | Vitesco Tech Gmbh | Device and method for detecting termination in communication unit in vehicle |
| 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 |
-
2021
- 2021-08-18 CN CN202110952074.5A patent/CN113665505B/en active Active
Patent Citations (13)
| 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 |
| JP2012148717A (en) * | 2011-01-20 | 2012-08-09 | Yupiteru Corp | Power supply control device |
| CN102842292A (en) * | 2011-06-24 | 2012-12-26 | 鸿富锦精密工业（深圳）有限公司 | Power supply management circuit and display device using same |
| 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 |
|---|---|
| CN113665505A (en) | 2021-11-19 |
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