CN102729927B - Video-unit, control device and car video system and control plant running method - Google Patents
Video-unit, control device and car video system and control plant running method Download PDFInfo
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- CN102729927B CN102729927B CN201210096927.0A CN201210096927A CN102729927B CN 102729927 B CN102729927 B CN 102729927B CN 201210096927 A CN201210096927 A CN 201210096927A CN 102729927 B CN102729927 B CN 102729927B
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- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 13
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- 230000001276 controlling effect Effects 0.000 description 13
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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
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
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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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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/40—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the details of the power supply or the coupling to vehicle components
- B60R2300/408—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the details of the power supply or the coupling to vehicle components using a data bus
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Abstract
The present invention relates to video-unit, control device and car video system and control plant running method.nullVideo-unit (203) for automobile (230) has the video interface (220) of the video signal for having image information、For showing or gather the mechanism (222 of image information、355)、For detecting the controlling organization (357) of the energy requirement of described video-unit、Administration of power supply (226) and connecting line (228)，Wherein said controlling organization (357) is configured to export the information about described energy requirement and is transmitted will pass through described video interface，Wherein said administration of power supply (226) is configured to from supply voltage (219) running voltage produced for running described video-unit，And wherein said connecting line (228) is for coupling together video interface with administration of power supply，For described supply voltage is transferred to described administration of power supply from described video interface.
Description
Technical field
The present invention relates to a kind of video-unit, a kind of control device, a kind of video system, a kind of method for running the video-unit with video interface and a kind of for running the method controlling device for video-unit for video-unit, described video-unit, control device, video system and the two method can be correspondingly with in the car.
Background technology
DE10131720A1 describes the HUD system of a kind of object for display automobile space outerpace.
Display device such as central display unit or the HUD supply in automobile is carried out for running energy necessary to display device by supply voltage joint.
Summary of the invention
Under this background, with the present invention introduce a kind of video-unit, a kind of for video-unit control device, a kind of video system, a kind of for run have video interface video-unit method and a kind of for run for video-unit control device method.Favourable design obtains from the explanation of application text context.
The present invention is based on the recognition that, i.e. can be come to video-unit supply for running energy necessary to described video-unit by video interface.Advantage of this is that, described video-unit need not the interface of the form of other such as supply voltage joint in addition to video interface, and wherein said video interface can be standardized video interface.The energy provided by described video interface can be matched with the current energy requirement of described video-unit.Can be supplied to the information about its energy requirement control device for this described video-unit, the energy being used for supplying video device is fed in described video interface by described control device.This point can be avoided in this way, i.e. carry out, by described video interface, the energy that energy necessary to transfer ratio is big.The described all occasions use can being connected by a video interface at two devices by the solution of the present invention.Applicable cases about this respect such as finds in the field of automobile or in building technology.
The present invention illustrates a kind of next to display device such as central display unit or the scheme of HUD supply current by video-data cable.Here, so adjust the supply voltage for display device by means of transducer circuit, thus required power can also be transmitted by commonly used normal data line.The feedback channel of video link is used for implement power adjust, for the loss power in display device is reduced to bottom line.
The present invention provides a kind of video-unit for automobile, and this video-unit has the feature that
-for having the video interface of the video signal of image information；
-it is used for showing or gathering the mechanism of the image information of video signal；
-for detecting the controlling organization of the energy requirement of described video-unit, wherein said controlling organization is configured to export the information about described energy requirement and is transmitted will pass through described video interface；
-administration of power supply, this administration of power supply is configured to the running voltage produced from supply voltage for running described video-unit；And
-connecting line, this connecting line is for coupling together video interface with administration of power supply, for described supply voltage is transferred to described administration of power supply from described video interface.
Described video-unit can be with the display device of form being such as central display unit or HUD.In this case, the mechanism of described display can be screen or display.Video signal can be received by described video interface.Described video-unit can also be the image collecting device of the form of such as photographic head.In this case, the mechanism of described collection is camera sensing device.Described video signal can be exported by described video interface at this.Described video-unit can be the equipment that itself closes, and this equipment can contact from outside by described video interface.Transmission video signal can be carried out in a digital manner by described video interface.Described video interface is at the interface for carrying out electrical contact with video-unit that this can be a unique outside.Described video interface can have a joint for video cables such as bullet connector.Video cables can also be connected with described joint regularly and such as weld together.Except described for the joint of video cables in addition to, described video interface can not have other cable or the joint of other electric wire for contacting other.Described video cables can have the many electric wires extended inside a common cable prepuce.Described cable prepuce can include the electro-magnetic screen layer for the electric wire being connected with described video interface.Can be with transmission video signal, about the information of energy requirement and supply voltage and corresponding supply current by many electric wires.Described controlling organization can be configured to the running status according to described video-unit or operational mode detects the energy requirement of described video-unit.Signal that described running status such as by user input values, can be received by video interface or the sensing device of described video-unit or monitor control mechanism change.Described energy requirement can define to run electric power necessary to video-unit in corresponding running status.Can meet the energy requirement of described video-unit at this, method is to provide corresponding supply voltage and corresponding supply current by described video interface.The maximum of described supply current is limited by the physical state of described video interface such as diameter of wire.Described supply voltage can be higher than the running voltage of described video-unit.Described administration of power supply can be power elements, such as voltage transformer.Described administration of power supply can be configured to be converted to supply voltage relatively low running voltage.Described running voltage may be used for running mechanism's such as logic of described video-unit.Described running voltage can be used for the mechanism running display or gathering.Described administration of power supply can also be configured to produce different running voltages from supply voltage.Described connecting line can be wire or the printed conductor of two inside of the inside of a twin-core, in described printed conductor wherein one can represent earth connection point.Described connecting line can typically comprise two distinguishing wires for video signal and two for positive voltage and the wire of ground wire and screen layer.
In one embodiment, described video-unit can have the logic for being controlled the function of this video-unit.This logic can run by described running voltage.Described logic can be one or more of integrated circuits.On the contrary, the mechanism of described display or collection can run with described supply voltage.Running voltage and supply voltage can be the most different.By means of described connecting line or another connecting line, described supply voltage can be transferred to described display or the mechanism gathered from described video interface.The most described mechanism can be the bias light of the screen of video-unit.By means of the information about energy requirement, described supply voltage can be adjusted to as running magnitude of voltage necessary to described mechanism.Owing to the mechanism of described display or collection can directly run with described supply voltage, so need not transformation for described mechanism.
Described video-unit can have multiple running status.Described controlling organization can have the memorizer of the information for storing a plurality of energy requirement about described video-unit.Can be by one of every information multiple running status being assigned in described video-unit at this.Such as the first running status can define the bigger brightness of the screen of described video-unit and the second running status can define the less brightness of screen.Accordingly, it is capable to demand can be higher than in the second running status in the first running status.A kind of running status can also define running and the still-mode of the another kind of running status described video-unit of definition of described video-unit, described in described still-mode, video does not has energy requirement or only has the least energy requirement.Described information can disposably preserve in which memory.When being changed into new running status or before, the information of the energy requirement about new running status being assigned in new running status can be read from described memorizer.Can ensure that in this way, be correspondingly provided solely for for possible running status and for being reliably carried out the electric as many electric power of power necessary to corresponding running status.The most especially in the running status with less energy requirement, unnecessary loss power is reduced to bottom line.
In one embodiment, described video interface can have for transmission video signal, about the information of energy requirement and the wire of supply voltage.Thus data necessary to institute's described video-unit of promising operation and energy can be transmitted by same wire.Risk is there may be in this case for the signal quality of video signal.In addition, it may create for the separate cost of signal.Described wire, it is so structured that the wire of twin-core, can carry out distinguishing signal transmission by the wire of this twin-core.In order to transmit the information about energy requirement, it is possible to use so-called sideband channel (Seitenbandkanal).Described video-unit can have suitably for by video signal and the separate separating mechanism of supply voltage.Described video-unit can also have suitably for the overlaying mechanism being added on supply voltage by information or the video signal about energy requirement.
Described video interface can also have for the first wire of transmission video signal with for transmitting the second wire of supply voltage.First and second wire described is correspondingly respectively configured to the wire of twin-core.The separate cable core of the cable with two distinguishing wires pair used the most in the car can be advantageously employed.Information about energy requirement can be by described first wire or can be transmitted by described second wire.In one embodiment, the information about energy requirement can be transmitted by video line.
The most described video interface can be LVDS interface (Low Voltage Differential Signal LowVoltageDifferentialSignaling).In this case, plan plot is not dependent on the mode of transmission of video, as long as it provides feedback channel.
Additionally, the present invention provides the control device of a kind of video-unit for automobile, this control device has the feature that
-for controlling the video interface of transmission video signal between device and video-unit；And
-voltage regulator, this voltage regulator is configured on the basis of the information about the energy requirement of described video-unit received by described video interface produce the supply voltage for running described video-unit and output it to described video interface to be transmitted by described video interface.
Described control device can be the equipment that itself closes, and this equipment has other outside interface or electrical contact in addition to described video interface.Energy can be supplied to described video-unit by means of described control device.In addition to described video interface, described control device can have supply voltage joint, can carry electric energy to described control device by this supply voltage joint, and this electric energy is applied not only to run described control device and for running described video-unit.Thus can supply energy only by described control device to described video-unit.Information about energy requirement can be delivered directly to described voltage regulator or be edited by the logic of described control device in advance.By means of the described information about energy requirement or from the control input of the described transistor that can trigger described controlling organization about the signal produced the information of energy requirement.The size of supply voltage can be regulated by means of described transistor.In one embodiment, described control device can be configured to determine is had image information to be shown and produces video signal on the basis of described image information and exported described video signal to described video-unit by described video interface.Described image information such as can include schematically or really illustrating of the environment of automobile.The driver that described image information can be suitable in driving task as automobile provides support.Described control device can also be configured to receive video signal by described video interface.Said image information such as can be gathered by photographic head.
Additionally, the present invention provides a kind of video system for automobile, this video system has the feature that
-by the video-unit of one embodiment of the present invention；
-by the control device of one embodiment of the present invention；And
-for the video line that the video interface of described video-unit and the video interface of described control device are coupled together.
A kind of system schema for the video interface by both having deposited to the power supply that the display device in such as automobile is optimized thus is provided.Described video system can be such as navigation system or driver assistance system.The most described control device can be configured to perform navigation system or the algorithm of driver assistance system.Described control device and video-unit can be arranged in the way of being spatially separated from each other and can be connected to each other by video line.
In addition, the present invention provides a kind of method for running the video-unit for automobile, described video-unit includes the video interface of the video signal for having image information and for showing or gather the mechanism of image information of video signal, the method comprise the steps that
-detection is about the information of the energy requirement of described video-unit；
-information about energy requirement is transferred to described video interface, in order to export information by described video interface；
-receive supply voltage by described video interface；
-from described supply voltage, produce the running voltage for running described video-unit；And
Described method can be implemented by by the mechanism of the video-unit of one embodiment of the present invention.
Before the step of described detection, can carry out being received the step of basis supply voltage by described video interface.If having no knowledge about the actual energy requirement of described video-unit, that just can provide described basis supply voltage when starting described system.The most described system can start with 12V, until will be transferred to controller about the information of energy requirement accurately from display.
Additionally, the present invention provides a kind of method controlling device for running the video-unit for automobile, wherein the method comprises the following steps:
-information of the energy requirement about described video-unit is received by the video interface of described control device；
-described about the information of energy requirement on the basis of produce for running the supply voltage of described video-unit；And
-export supply voltage by described video interface.
Described method can be implemented by by the mechanism controlling device of one embodiment of the present invention.Before receiving about the step of the information of energy requirement, by described video interface, described basis supply voltage can be supplied to described video-unit.
Device may refer to electrical equipment at this, and this electrical equipment processes sensor signal and exports control signal accordingly.This device can have interface, and this interface can be constituted with hardware and/or software mode.When constituting in hardware, described interface can be such as so-called system ASIC(special IC) a part, this part includes the types of functionality of described device.But it is also possible that arrange, the most described interface is the integrated circuit of self or includes scattered structural detail at least in part.When being constituted with software mode, described interface can be software module, and described software module such as exists on microcontroller in addition to other software module.
A kind of computer program with program code is favourable, and this program code can be saved on machine-readable carrier such as semiconductor memory, harddisk memory or optical memory and implement by the method one of embodiment described above Suo Shu during for performing described program on the equipment being equivalent to computer.
Accompanying drawing explanation
Exemplarily the present invention is explained in detail below by way of accompanying drawing.Accompanying drawing is shown below:
Fig. 1 is the block diagram of video system；
Fig. 2 a is the block diagram of the video system by a kind of embodiment of the present invention；
Fig. 2 b is the schematic diagram of the automobile by a kind of embodiment of the present invention；
Fig. 3 is the block diagram of the video system by the another kind of embodiment of the present invention；
Fig. 4 is the voltage regulator by a kind of embodiment of the present invention；
Fig. 5 is the block diagram of the video system by the another kind of embodiment of the present invention；
Fig. 6 is the block diagram of the video system by the another kind of embodiment of the present invention；And
Fig. 7 is the flow chart of the method for running the video system by a kind of embodiment of the present invention.
Following in a preferred embodiment of the present invention description, use same or similar reference for element that is that illustrate in different drawings and that work similarly, wherein abandon the repeated description to these elements.
Detailed description of the invention
Fig. 1 shows the block diagram of video system, and this video system has navigator 101, central display unit 103 and the wire 105 coupled together by described navigator 101 with described central display unit 103.Described navigator 101 can represent main computer unit (Head-Unit).Described navigator 101 and central display unit 103 are respectively provided with the first voltage jointer the 111, second voltage jointer 113 and communication interface 115.Cell voltage UBAT or 12V voltage can be inputted by described first voltage jointer 111.Described second voltage jointer 113 can be earth connection point.Described communication interface 115 can be field-bus interface such as CAN interface (controller local area network ControllerAreaNetwork).Described wire 105 has two stranded heart yearns to 117 that is so-called twisted-pair feeders and by the described stranded heart yearn screen layer 119 to surrounding.
In one embodiment, described central display unit 103 can be the display device used in the car or instruction equipment.Described equipment 103 is except also having the other connector connection 111,113 for supply voltage such as 12V and ground wire and communication interface 115 such as CAN interface in addition to connecting the video interface of wire 105.Described video interface connect through typically as single channel LVDS 4 cores that shielded have two stranded heart yearns to 117 cable and the connector of self connect and realize, wherein said heart yearn is not utilized to one of 117.
Fig. 2 a shows the block diagram of the video system by a kind of embodiment of the present invention.This video system can be arranged in the car.This video system has control device 201 and video-unit 203.Described control device 201 and video-unit 203 are connected to each other by video line 205.Described video line 205 can have the structure that figure 1 illustrates, this structure have two stranded heart yearns to and screen layer.
Described control device 201 also has voltage jointer 211, communication interface 215, video interface 217 and voltage regulator 218 in addition to other unshowned mechanism.By described video interface 217, described control device 201 and described video line 205 have carried out electrically and have been mechanically connected.Described voltage regulator 218 directs or through other unshowned mechanism and is not only connected depending on interface 217 with described frequency but also is connected with described voltage jointer 211.
Described video-unit 203 also has video interface 220, for showing or gathering the mechanism 222 of image information, controlling organization 224, administration of power supply 226 and connecting line 228 in addition to other unshowned mechanism.Described administration of power supply 226 is connected with described video interface 220 by described connecting line 228 and is connected with described mechanism 222 by another connecting line.Described controlling organization 224 is connected with described video interface 220.
Described controlling organization 224 is configured to determine the energy requirement of described video-unit 203 and export the corresponding information about energy requirement to described video interface 220.Described video interface 220 is configured to by described video line 205, the information about energy requirement is transferred to described control device 201.The video interface 217 of described control device 201 is configured at described video line 205 receive the information about energy requirement and provide it to described voltage regulator 218.Described voltage regulator 218 is configured to the voltage being carried on described voltage jointer 211 is converted to supply voltage 219 and exports described supply voltage 219 to described video interface 217.Said voltage regulator 218 is configured to regulate the numerical value of described supply voltage 219 according to the information about energy requirement.Said supply voltage can have than be carried in the magnitude of voltage that the magnitude of voltage of the voltage on described voltage jointer 211 is big.By described video interface 217, described supply voltage 219 exported to described video line 205 and be transmitted to described video-unit 203 by this video line 205.Described supply voltage 219 is transferred to described administration of power supply 226 by video interface 220 and described connecting line 228 by described video-unit 203.Described administration of power supply 226 is configured to described supply voltage 219 is converted to running voltage.According to this embodiment, described administration of power supply 226 is configured to described supply voltage 219 is converted to the running voltage for running described mechanism 222 and exports described running voltage to described mechanism 222.Described administration of power supply 226 can be configured to additionally or alternatively running voltage be exported to the other mechanism of described video-unit 203.Described administration of power supply 226 can also be configured to produce different running voltages from described supply voltage 219 and output it to the different mechanism of described video-unit 203.
Fig. 2 b shows the schematic diagram by the automobile 230 with video system of a kind of embodiment of the present invention.Described video system can be that have control device 201 and the video system of video-unit 203, described control device and the video-unit described in fig. 2 a is connected to each other by video line 205.Described video-unit 203 can have display, can show image information to the driver of automobile 230 on the display.As an alternative or additional project, described video-unit can have the image acquisition mechanism for gathering image information.Described automobile 230 has battery 232.This battery 232 is connected with the voltage jointer 211 of described control device 201 by wire.By described cell voltage to described control device 201 supply of electrical energy and by described control device 201 also to described video-unit 203 supply of electrical energy.
According to a kind of embodiment, described video-unit 203 is display device and described video line 205 is LVDS video link, and this video link provides extra communication channel, the most so-called sideband channel.Described extra communication channel connects for cancelling extra such as connector for CAN and power supply.On the one hand can ensure that enough power supplies of described display device 203 at this and on the other hand can ensure that in accordance with the overcritical quiescent current needs being typically less than 100 μ A.This is by realizing the idle heart yearn of LVDS video cables 205 this mode of power supply being used for described display device 203.But, the normal data line of the existence of described video cables 205 only has the current carrying capability of about 2A.Required display brightness it is combined in automobile 230 for the equipment of ' equipment, 12 ' ' equipment or bigger the most enough with this power at 18W maximum in following operating voltage range that can transmit for bigger display device such as 10 ' for 9V cell voltage.This situation is aggravated by the movement from 9V to 6.5V cell voltage of following operating voltage range for the automobile 230 with start-stop automaton extraly.
The core idea of the present invention is, improves the supply voltage for display device 203.This has been able to the power of transmission up to 64W for the voltage of 32V, and this power is enough for the bigger display with shuangping san technology.
In order to realize this point with minimum loss power in all running statuses of display device, transmit the information about the supply voltage required for described display device 203 by the sideband channel (feedback channel) of described video interface 220.Transmitting element 201 such as navigator or combination instrument in this case can by can the voltage regulator 218 of variable adjustment supply voltage is adjusted to required numerically.This function provides the advantage that, loss power in equipment 203 is reduced to bottom line by the power drain of the dim degree depending primarily on display background light adjusting described display device 203 in other words, consequently, it is possible to be less necessary that the measure taking other such as reduces display brightness, to avoid cause thermal damage when ambient temperature is the highest.
Fig. 3 shows the block diagram of the video system by the another kind of embodiment of the present invention.Described video system has the video-unit 203 of the form controlling device 201 and central display unit of the form of main computer unit or navigator.Described control device 201 is connected with video-unit 203 by video line 205.
Described video line 205 is configured to the 2x2 core twisted-pair feeder shielded, say, that have two heart yearns pair guided by the cable wrap shielded.
Described control device 201 has video interface 217 " Video " and car plug 341 as outside joint.By described video interface 217, described control device 201 is connected with video line 205.By described car plug 341, the communication interface 215 of described control device 201 and the form of CAN interface (1x2 core twisted-pair feeder) and voltage jointer 211(1xKL30,1xGND) it is connected.Supplied the cell voltage of automobile to described control device 201 by described voltage jointer 211.Additionally, described control device 201 has graphics controller 343, the transmitter of form of LVDS conveyer 345, microcontroller 347, CAN transceiver 349 and is configured with the most so-called reducing transformer of the switching regulaor for reducing voltage (StepDown) and is used for carrying the voltage regulator 218 of the form of the power elements of the most so-called booster of high-tension switching regulaor LVDS (StepUp).Described graphics controller 343 is configured to be exported by figure signal to described LVDS transmitter 345；This is such as it is so structured that the RGB of numeral transmits.Described LVDS transmitter 345 is configured to export LVDS signal to described video interface 217.Additionally, described video interface 217 is configured to receive the supply voltage 219 " 24VLVDS " exported by described voltage regulator 218.Described LVDS transmitter 345 and microcontroller 347 are connected to each other by two-way data wire " UARTRX/TX ".Additionally, described microcontroller 347 is connected with described CAN transceiver 349 by two-way data wire " CANRX/TX ".This CAN transceiver 349 is connected with described car plug 341 by two-way data wire " CAN_H, CAN_L ".Described microcontroller 347 is configured to export the signal being used for carrying out voltage-regulation to described voltage regulator 218.In order to produce the signal for carrying out voltage-regulation, described microcontroller 347 can receive the signal transmitted by the feedback channel of video line 205 of described video-unit 203.Described voltage regulator 218 is connected by the earth connection point GND of car plug 341 with supply voltage joint KL30 and voltage jointer 211.Described voltage regulator 218 is configured in the case of being controlled by the described signal for carrying out voltage-regulation produce described supply voltage 219 " 24VLVDS " from the voltage being carried in described voltage jointer 211 and output it to described video interface 217.
Described video-unit 203 only has video interface 220 " Video " as outside joint.By this video interface 220, video-unit 203 is connected with video line 205.Additionally, described video-unit 203 has the receptor of form of LVDS receiver 351, graphic process unit or FPGA(field programmable gate array) the TCON(time schedule controller of the form of 353), the screen 355 of form of display, microcontroller 357, be configured with the switching regulaor for carrying out blood pressure lowering for the electronic installation of video-unit 203 and the administration of power supply 226 of the form of the power elements of switching regulaor for carrying out boosting for the light 222 of display 355.Described video interface 220 is configured to export LVDS signal to described LVDS receiver 351 and exports supply voltage 219 " 24VLVDS " and ground wire " GND " to described administration of power supply 226.Described LVDS receiver 351 is configured to export signal " digital rgb or LDI " to described FPGA353.Additionally, described LVDS receiver 351 is connected with described microcontroller 357 by two-way wire " UARTRX/TX ".Described FPGA353 is configured to export signal " digital rgb or RSDS " to display 355.Described administration of power supply 226 is configured to be converted to the supply voltage 219 received by described video interface 220 for the running voltage of light 222 and outputs it to described light 222.This light 222 is configured to produce bias light for described display 355.
Thus, the image information produced by described graphics controller 343 can be exported to described graphic process unit 353 by described LVDS conveyer 345, video interface 217, video line 205, video interface 220 and LVDS receiver 351, and shows on screen 355 in the case of being controlled by this image processor 353.Additionally, the supply voltage produced by described voltage regulator 218 can be transferred to described administration of power supply 226 and by described administration of power supply 226 for powering to described video-unit 203 by described video interface 217, video line 205, video interface 220 and connecting line 228.The most such as can be produced the information of energy requirement about described video-unit 203 by described microcontroller 357 and be transferred to described voltage regulator 218 by video interface 220, video line 205, video interface 217 and microcontroller 347.
According to a kind of embodiment, the power supply of described central display unit 203 by the idle heart yearn in vision cable 205 to carrying out and communicate being carried out by the sideband channel of described video interface 217,220.Thus can cancel car plug and CAN transceiver on central display unit side.The voltage 219 raised from described supply voltage 211 is supplied to described central display unit 203.This voltage such as may refer to " 24V " being previously mentioned.The structure of the described voltage regulator 218 for producing the supply voltage for display device 203 can be carried out according to prior art.
Fig. 4 shows the voltage regulator 218 by a kind of embodiment of the present invention.This voltage regulator 218 can be used on the control device 201 shown in Fig. 3.This voltage regulator 218 is configured to from input voltage " KL30 " produce supply voltage 219 " U_LVDS ".
Described voltage regulator 218 has transistor 461, induction coil 462, diode 463, voltage regulator 464, transistor 465, resistance 466, resistance 467, resistance 468 and transistor 469.The control joint of described transistor 461 is connected with wire " EN ".The input of described transistor 461 is connected with supply voltage joint " KL30 " and the outfan of described transistor 461 is connected with the input " VCC " of the first joint of described induction coil 462 and described voltage regulator 464.Second joint of described induction coil 462 is connected with the first joint of described diode 463 and the input of described transistor 465.The outfan of described transistor 465 is connected with ground wire " GND ".Described voltage regulator 464 is configured to export signal " drive " to the control input of described transistor 465.The earth connection point of described voltage regulator 464 is connected with ground wire " GND ".Second joint of described diode 463 provides the supply voltage 219U_LVDS for described video-unit.Second joint of described diode 463 is connected with the first joint of described resistance 466.Second joint of described resistance 466 is connected with the feedback joint " FB " of the first joint of described resistance 467, the first joint of described resistance 468 and described voltage regulator 464.Second joint of described resistance 467 is connected with the input of described transistor 469.The outfan of this transistor 469 is connected with ground wire " GND ".Signal " SET " is provided to the control input of described transistor 469.Second joint of described resistance 468 is connected with ground wire " GND ".
The regulation of described output voltage " U_LVDS " such as can be by having resistance 466,467,468 and MOSFET(mos field effect transistor in the feedback circuit of voltage regulator) the variable potentiometer of 469 carries out.Described SET signal can be exported by the microcontroller 347 with digital-to-analog-transducer that figure 3 illustrates.Described MOSFET461 is for cutting off the electricity supply by the microcontroller 347 that figure 3 illustrates with signal EN.It is possible to the requirement according to the central display unit in resting state now and realize being significantly less than the quiescent current consumption of 100 μ A.
For the voltage-tracing of described voltage regulator 218 and the exemplary embodiment that figure 4 illustrates of cut-out, have selected the schematic diagram not used for the capacitor carrying out the smooth optimization with electromagnetic compatibility of voltage of simplification.
In the embodiment illustrated, the output voltage " U_LVDS " of central display unit 203 for figure 3 illustrates can be regulated the most as follows:
This is for such as U_FB=1.25V, R1=33kOhm、R2=1.2kOhm、R3Produce for the typical numerical value of=2.2kOhm and be in the range of accommodation between about 13V and 36V.This is equivalent to described transistor 469 and fully opens the state closed in other words.
Supply voltage required in different operation conditions can be left in by characteristic curve in the EEPROM data item i.e. nonvolatile storage of described central display unit 203.Described nonvolatile storage such as can be read by the microcontroller 357 that figure 3 illustrates.
The power supply of described central display unit 203 need not be changed relative to prior art, but the monitoring of automobile-used circuit filtering and cell voltage can be saved.
Fig. 5 shows the block diagram of the video system by the another kind of embodiment of the present invention.This video system is equivalent to the video system that figure 3 illustrates, but difference is that administration of power supply 226 only has the switching regulaor for carrying out reducing pressure for the electronic installation of described video-unit 203 as power elements.Light 222 is powered not by described administration of power supply 226.In other words, described the connecting line 228 that video interface 220 and administration of power supply 226 couple together is led to described light 222 extraly.The running voltage of the most described light 222 is equivalent to the supply voltage 219 provided by described control device 201 by video line 205.
According to this embodiment, as other synergism, cancel the voltage regulator of the supply voltage of the LED bias light 222 being used for display 355 for generation.As the supply voltage for described LED bias light 222, directly use the supply voltage 219 boosting to the most correct numerical value of described display device 203, receive described supply voltage 219 at this by described video interface 220.
Due to LEDs forward voltage about produce and the higher dispersion of temperature, this readjustment that typically can only be in operation the regulation by required supply voltage 219 and required supply voltage 219 is meaningfully carried out, because the standby voltage otherwise temporarily provided declines directly as the loss power in display device 203.
Thus described supply voltage 219 is directly used in light 222.This can save voltage regulator.Make described supply voltage 219 match with the voltage requirements of described light 222 at this.This matching treatment is carried out in the voltage regulator 218 of described control device 201.
Additionally, the forward voltage that the LEDs that can preserve described light 222 in the fabrication process detects at normal temperatures.
Fig. 6 shows the block diagram of the video system by the another kind of embodiment of the present invention.This video system is equivalent to the video system that figure 5 illustrates, but difference is that described video-unit is not display device but camera system.This have the consequence that, described control device 201 replacement LVDS conveyer and there is LVDS receiver 645.Described video-unit 203 replacement display and there is the such as imageing sensor 655 using CCD or CMOS technology manufacture, the FPGA653 as graphic process unit and replace LVDS receiver and there is LVDS conveyer 651.Described administration of power supply 226 only has for carrying out, for the electronic installation of described video-unit 203, the switching regulaor that reduces pressure and being connected with described video interface 220 by described connecting line 228 as power elements, is passed through, by described control device 201, the supply voltage 219 that video line 205 provides for obtaining.According to this embodiment, it is transferred to described control device 201 by described video line 205 from the described video-unit 203 information by video signal with about the energy requirement of described video-unit 203.In opposite direction, and from described control device 201 it is used for the supply current of described video-unit 203 is transferred to described video-unit 203 by supply voltage 219 by described video line 205.
The scheme of the most described power supply can be also communicated to other by LVDS and have on the equipment of video interface, is such as transferred on camera system 203.Camera system in automobile can be video-unit 203, such as backup camera or night vision cam.These photographic head can also replace navigator 201 and be connected on combination instrument, and described combination instrument has corresponding for the circuit powered to described photographic head 203 by video interface 217.
According to a kind of embodiment, for the supply voltage 219 of video-unit 203 such as display device or photographic head not by the idle heart yearn of described video line 205 to transmitting, but it is superimposed upon the holding wire for data transmission of described video line 205.The video signal of supply voltage 219 and high frequency has been separately prior art, and such as by means of the device bus in EIB(Europe) in other words KNX realized in the field of building automation.Utilize this technology that 2 core cables 205 inexpensively and connector can also be used to connect.
The scheme of the described superposition with holding wire and supply lines can also be used in multichannel LVDS i.e. plural signal core line to upper.The most described video line can have plural heart yearn pair.
Described technology can be used in other Video Transmission Scheme, is such as similarly used in Video/FBAS, DVI, HDMI or DisplayPort Video Transmission Scheme.For the system of feedback-less channel capacity, carry out the multiplexing (seeing the KNX in other words of the EIB in building automation field) between the circuit of feedback channel (such as UART) and conduction according to prior art.
Can imagine the communication between the equipment 201,203 that sending side receives on side in other words by different interfaces, described interface is then transmitted by described sideband channel.Such interface such as includes UART, 12C, SPI or CAN.
The microcontroller 357 of described central display unit 203 can together be integrated in described FPGA353.The conveyer 651 of the LVDS receiver 351 of the form of Serial-Parallel Converter or the form of parallel-to-serial converter is desirably integrated into described FPGA353, in 653.
According to a kind of embodiment, in order to be powered to described video-unit 203 by described video interface 217,205,220, transmitted the supply voltage of rising by described interface 217,205,220.Voltage-tracing such as can be triggered by the variation of the ambient brightness of described video-unit 203.In order to detect ambient brightness, described video-unit 203 can have optical sensor.Thus the variation of ambient brightness causes the variation of the supply voltage by the transmission of described interface 217,205,220.
Fig. 7 shows the flow chart of the method for running the video system by a kind of embodiment of the present invention.The method can be implemented in described having controls the system of device and video-unit.
In step 701, detected the energy requirement of this video-unit by described video-unit.In step 703, by video interface, the information about energy requirement is transferred to described control device from described video-unit.In step 705, the described information about energy requirement is received by described control device.In step 707, by described control device described about the information of energy requirement on the basis of produce for running the supply voltage of described video-unit.In step 709, described supply voltage is transferred to described video-unit by described control device by video interface.In step 711, described supply voltage is received by video interface by described video-unit.In step 713, it is used for running described video-unit by the supply voltage received.Said supply voltage can send the mechanism of described video-unit to directly as running voltage or first pass through voltage transformer and be converted to suitable running voltage.The power received by described video interface thus is used for showing or gathering the image information of video signal by described video-unit.Described step can be consecutively carried out, thus ensures to supply energy to described video-unit continuously by described control device.
The most exemplarily have selected embodiment described and illustrated in the accompanying drawings.Different embodiments completely can or the most combined about each feature.A kind of embodiment can also be supplemented by the feature of another kind of embodiment.Additionally, step can repeat and can be to perform with described order different in the present inventive method.
Claims (10)
1., for the video-unit (203) of automobile (230), have the feature that
-for having the video interface (220) of the video signal of image information；
-it is used for showing or gathering the mechanism (222 of the image information of video signal；355；655)；
-for detecting the controlling organization (357) of the energy requirement of described video-unit, wherein said controlling organization is configured to export the information about energy requirement and is transmitted will pass through described video interface；
-administration of power supply (226), this administration of power supply is configured to from supply voltage (219) running voltage produced for running described video-unit；And
-connecting line (228), this connecting line is for coupling together video interface with administration of power supply, in order to from described video interface, described supply voltage is transferred to described administration of power supply.
2. the video-unit (203) as described in claim 1, has the logic (353 for being controlled the function of this video-unit；653), wherein said logic can run by described running voltage, and described display or gather mechanism (222；355；655) can run with described supply voltage (219).
3. by video-unit in any one of the preceding claims wherein (203), wherein this video-unit has a multiple running status and described controlling organization (357) has the memorizer of the information for storing a plurality of energy requirement about described video-unit, wherein one of every information multiple running status being assigned in described video-unit.
4. the video-unit (203) as described in claim 1, wherein said video interface (220) has the contact of the first wire (117) for being connected to transmission video signal and is used for the contact being connected to transmit second wire (117) of supply voltage (219).
5. the video-unit (203) as described in claim 1, wherein said video interface (220) is LVDS interface.
6. it is used for the control device (201) of the video-unit (203) of automobile (230), has the feature that
-for controlling the video interface (217) of transmission video signal between device and video-unit；And
-voltage regulator (218), this voltage regulator is configured on the basis of the information about the energy requirement of described video-unit received by described video interface produce the supply voltage for running described video-unit and output it to described video interface to be transmitted by described video interface.
7., for the video system of automobile, have the feature that
-video-unit (203) as according to any one of claim 1 to 5；
-control device (201) as described in claim 6；And
-for the video line (205) that the video interface (220) of described video-unit and the video interface (217) of described control device are coupled together.
8., for the method running the video-unit (203) for automobile (230), described video-unit includes the video interface (220) of the video signal for having image information and is used for showing or gathering the mechanism (222 of the image information of video signal；355；655), the method comprise the steps that
-detection (701) is about the information of the energy requirement of described video-unit；
-information about energy requirement is transmitted (703) to described video interface, in order to export described information by described video interface；
-receive (711) supply voltage (219) by described video interface；And
-from described supply voltage, produce (713) for running the running voltage of described video-unit.
9. the method as described in claim 8, wherein carried out being received by described video interface the step of basis supply voltage before the step of described detection.
10., for the method running the control device (201) of the video-unit (203) for automobile (230), wherein the method comprises the following steps:
-receive (705) information about the energy requirement of described video-unit by the video interface (217) of described control device；
-on the basis of about the information of energy requirement, produce (707) for running the supply voltage (219) of described video-unit；And
-export (709) described supply voltage by described video interface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011006812A DE102011006812A1 (en) | 2011-04-06 | 2011-04-06 | Video device for vehicle, has connecting line which connects video interface with power supply unit, with supply voltage of video interface to be transferred to power supply unit |
| DE102011006812.0 | 2011-04-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102729927A CN102729927A (en) | 2012-10-17 |
| CN102729927B true CN102729927B (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210096927.0A Active CN102729927B (en) | 2011-04-06 | 2012-04-05 | Video-unit, control device and car video system and control plant running method |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20120114175A (en) |
| CN (1) | CN102729927B (en) |
| DE (1) | DE102011006812A1 (en) |
| FR (1) | FR2973753B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015122424A1 (en) * | 2015-12-21 | 2017-06-22 | Connaught Electronics Ltd. | Method for detecting a surrounding area of a trailer with a motor vehicle and a trailer, and camera system |
| FR3048098B1 (en) * | 2016-02-23 | 2018-11-02 | Peugeot Citroen Automobiles Sa | DEVICE FOR ANALYZING A BI-DIRECTIONAL VIDEO NETWORK BY OBSERVING INTERCHANGEED FRAMES BETWEEN ORGANS |
| CN107650840A (en) * | 2017-08-26 | 2018-02-02 | 上海魁殊自动化科技有限公司 | A kind of device for being used to provide voltage to motor vehicles control device |
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| DE10131720A1 (en) * | 2001-06-30 | 2003-01-16 | Bosch Gmbh Robert | Head-up display system and method |
| JP2007004689A (en) * | 2005-06-27 | 2007-01-11 | Fujitsu Ten Ltd | Image processor and image processing method |
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| CN201499251U (en) * | 2009-06-04 | 2010-06-02 | 杭州平川电子有限公司 | Power transport network video frequency server |
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-
2011
- 2011-04-06 DE DE102011006812A patent/DE102011006812A1/en not_active Withdrawn
-
2012
- 2012-04-05 KR KR1020120035358A patent/KR20120114175A/en not_active Application Discontinuation
- 2012-04-05 FR FR1253126A patent/FR2973753B1/en active Active
- 2012-04-05 CN CN201210096927.0A patent/CN102729927B/en active Active
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| DE10131720A1 (en) * | 2001-06-30 | 2003-01-16 | Bosch Gmbh Robert | Head-up display system and method |
| JP2007004689A (en) * | 2005-06-27 | 2007-01-11 | Fujitsu Ten Ltd | Image processor and image processing method |
| CN2914262Y (en) * | 2006-05-01 | 2007-06-20 | 汕头市汕沪电缆厂有限公司 | Video integrated cable |
| JP2009129254A (en) * | 2007-11-26 | 2009-06-11 | Hitachi Ltd | Crime prevention system and onboard apparatus |
| CN201467298U (en) * | 2009-06-04 | 2010-05-12 | 杭州平川电子有限公司 | Camera of electric power transmission network |
| CN201499251U (en) * | 2009-06-04 | 2010-06-02 | 杭州平川电子有限公司 | Power transport network video frequency server |
| CN101820372A (en) * | 2010-03-17 | 2010-09-01 | 浙江大学 | TDM (Time Division Multiplexing) single-bus communication system of power supply, data signals and audio analog signals |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2973753A1 (en) | 2012-10-12 |
| DE102011006812A1 (en) | 2012-10-11 |
| FR2973753B1 (en) | 2017-12-15 |
| CN102729927A (en) | 2012-10-17 |
| KR20120114175A (en) | 2012-10-16 |
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