JP5023830B2 - DSRC in-vehicle device and display system using the same - Google Patents

Description

  The present invention relates to a DSRC in-vehicle device that performs narrow area communication and a display system using the same.

  Conventionally, for example, Patent Document 1 proposes a navigation device that displays an image of road traffic jam information based on VICS information provided by a road traffic information communication system (VICS). Specifically, in Patent Document 1, a navigation controller that controls the entire system, a beacon transmitter / receiver and an FM multiplex broadcast receiver that receive road traffic information transmitted from a VICS center by various communication methods, a map image, and a guidance A navigation device having a route and a display device for displaying road traffic information transmitted from the VICS center has been proposed.

  Among these, the navigation controller is included in the reception data buffer for storing the VICS information received by the beacon transceiver and the FM multiplex broadcast receiver, and the map area drawn in the VRAM from the VICS information stored in the reception data buffer. And a VICS information drawing unit for selecting a display corresponding to the VICS information.

In such a navigation apparatus, the VICS information drawing unit examines the VICS data sequentially stored in the reception data buffer and monitors whether new traffic information is received. When new traffic information is received, the traffic information is drawn on the map drawn in the VRAM, and an image is displayed on the display device.
JP-A-10-227648

  However, in the above conventional technique, the navigation apparatus needs to include a VICS information drawing unit that can draw information such as road traffic information transmitted from the VICS center as an image on a map drawn in the VRAM. As a result, there is a problem that information from a roadside device cannot be displayed as an image on a navigation device that does not include a VICS information drawing unit, that is, an image display function.

  On the other hand, the amount of information transmitted from roadside machines is expected to increase in the future. However, there is a problem that the displayed image flickers at the time of image switching or superimposed display due to the limit of the image processing capability of the navigation device.

  In view of the above points, the present invention has as its first object to draw information transmitted from a roadside device without requiring a navigation device having a drawing function, and to reduce flickering of an image to be displayed. Second purpose.

To achieve the above object, the present invention provides a receiver (7) that receives a transmission signal including image data transmitted from a roadside machine (2), and an image from a transmission signal received by the receiver (7). A data extraction unit (10) for extracting data and drawing an image to be displayed on the plurality of displays (4 to 6) based on the image data, and an image to be displayed on the plurality of displays (4 to 6) A display controller (15) for outputting data extraction conditions for rendering to the data extraction unit (10),
Data extraction unit (10), based on input from the display controller (15) Lud over data extraction conditions, a plurality of display data extraction function unit to select the information to be displayed on the (4-6) (11) And an image generation unit (12) for drawing an image using the information and image data selected by the data extraction function unit (11), and drawing data of the image drawn by the image generation unit (12) Display memory (13)
The drawing data stored in the display memory (13) is inputted to the plurality of displays (4 to 6) so that an image is displayed.

  According to this, since the image generation unit (12) capable of drawing an image is provided in the data extraction unit (10), the DSRC in-vehicle device can be used even if the vehicle (1) is not equipped with a navigation device having a drawing function. Image drawing can be performed.

  An image to be displayed on the display (4-6) is stored in the display memory (13) and then displayed on the display (4-6). For this reason, since the already drawn image is only displayed, the flickering of the image can be eliminated.

  The data extraction function unit (11) can read the circuit configuration from the reception data DB unit (9) that stores the circuit configuration for processing the image data, and generate a circuit configuration in the data extraction unit (10).

  Thereby, the image data extracted from the transmission signal can be drawn by the image generation unit (12), and the data of the drawn image can be stored in the display memory (13).

The display controller (15) inputs the determination result of the traffic safety level determination device (23) that determines the traveling state of the vehicle (1), and displays it on the plurality of indicators (4 to 6) based on the determination result. The priority of the power image is determined, and the priority of the image is input to the data extraction function unit (11), so that the data extraction function unit (11) selects an image with a higher priority. .

  Thereby, useful information for a user can be displayed on a display (4-6). In this case, image display according to the user's preference or the positional relationship between the user's boarding position and the display (4-6) can be performed. When the plurality of indicators (4 to 6) are mounted on the vehicle (1), for example, data important for driving can be displayed on the indicators (4 to 6) located near the driver.

The data extraction unit (10) checks the increase / decrease in the number of the plurality of indicators (4-6) connected via the plurality of interfaces (16-18), and the data extraction function unit (11) receives the increase / decrease according to the increase / decrease. A circuit configuration for processing image data corresponding to the plurality of displays (4 to 6) is read from the data DB section (9). Thereby, a data processing circuit corresponding to each of the plurality of displays (4 to 6) can be formed.

In the above description, the configuration of the DSRC in-vehicle device is described. It can also be configured as a display system having a plurality of displays (4 to 6) mounted on the vehicle (1) and displaying image drawing data inputted from the DSRC in-vehicle device.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a display system including a DSRC in-vehicle device according to an embodiment of the present invention. As shown in this figure, the display system is provided along a path through which the vehicle 1 passes, and a roadside device 2 that transmits a transmission signal including image data, a DSRC in-vehicle device 3 mounted on the vehicle 1, and And display units 4 to 6.

  The DSRC in-vehicle device 3 has a function of receiving a transmission signal transmitted from the roadside device 2 and displaying the image data included in the transmission signal on the display devices 4 to 6. The image data includes an application name (application ID), a standardized format (ISO, JIS), a display image size, a display data processing memory size, an image compression format, a display, and the like.

  FIG. 2 is a block diagram of the DSRC in-vehicle device. Hereinafter, the configuration of the DSRC in-vehicle device 3 will be described with reference to FIG. In the following, it is assumed that image information and audio information are received from the roadside device 2, the image information is displayed as an image, and the audio information is notified.

  The DSRC in-vehicle device 3 includes a receiver 7 that receives a signal transmitted from the roadside device 2. The signal received by the receiver 7 is input to the reception data DB unit 9 and the data extraction unit 10 via the reception data input I / F 8.

  The reception data DB unit 9 stores a circuit configuration for processing image data. Specifically, the reception data DB unit 9 stores an image data configuration DB as general image drawing information, a reception data DB as a type of information such as general information and emergency information, and a dictionary. . When the received data is input, the received data DB unit 9 determines what type of information the received data is and outputs the result.

  The data extraction unit 10 has a function of allowing received data to be input and displaying an image on the displays 4 to 6. The data extraction function unit 11, the image generator / changer 12, the display memory 13, The display output generator 14 is provided.

  Such a data extraction unit 10 reads out a circuit configuration for processing image data from the received data DB unit 9 and generates the circuit configuration, and processes the image data according to the generated circuit configuration.

  The data extraction function unit 11 has a function of selecting information to be displayed based on a command from the display controller 15 described later. The image generator / changer 12 renders information selected by the data extraction function unit 11 as an image. The image generator / changer 12 corresponds to the image generator of the present invention.

  The display memory 13 stores drawing data of an image drawn by the image generator / changer 12. The display output generator 14 converts the image drawing data format into a format in which the displays 4 to 6 can display an image, for example, the jpg format or the tiff format, and outputs the converted data.

  In other words, when the storage location designation data is input from the display controller 15, the display memory 13 reads the storage location designated by the hard logic and stores the image at the designated location. In this way, even if there are a plurality of data, high-speed processing can be performed. When the extracted data is not completely completed, a data retransmission request is issued from the display controller 15 to the data extraction unit 10, and the data extraction unit 10 performs a retransmission process.

  The image drawing data generated by the data extraction unit 10 is output to the respective displays 4 to 6 through the I / Fs 16 to 18. For example, the same image is displayed on each display 4-6. The I / Fs 16 to 18 correspond to the interface of the present invention.

  Each data is input to the data extraction unit 10 from the outside vehicle display DB 19, the road information DB 20, and the in-vehicle display DB 21. Infrastructure information such as general roads, expressways, and parking lots is stored in the vehicle infrastructure display DB 19. The road information DB 20 stores information on the road on which the vehicle 1 is traveling. This road information is periodically updated by an external memory or received data. The in-vehicle display DB 21 stores specification information of the vehicle 1 such as four-seater.

  Note that the data extraction unit 10 includes a transmission request for transmitting data to the roadside device 2 and creation of data, and a transmitter (not shown) for transmitting the created data to the roadside device 2. In addition, the data extraction unit 10 analyzes information received from the in-vehicle device or the external device, and accumulates data necessary for receiving the communication data in the own vehicle. Therefore, the data extraction unit 10 is provided with a slot to which a programmable logic and a vibrator can be added, and hardware for ensuring that the communication information used in the vehicle 1 can be received and used is incorporated. . This hardware has a circuit configuration changed by software. In this case, an optimized circuit design can be implemented by a program so that the circuit configuration does not have redundancy. The optimization circuit design is to create a new logic circuit by a program in order to process the communication device when one communication device is added. However, in the present embodiment, for example, the same frequency band is used as in ETC and DSRC, but when communication services are not performed at the same timing, a single circuit is used and processing is performed by application switching. I have to. When DSRC is replaced between vehicles and DSRC in-vehicle device 3 disappears in the own vehicle, the information is detected and switching to DSRC is not performed. That is, a process that is no longer needed can be easily deleted. On the other hand, when high-speed communication is desired using a plurality of channels in the same frequency band, it is possible to determine by a program so that the oscillators are the same and only a plurality of communication processing circuits are provided.

  The user operation determination device 22 is configured by a user to select information such as displaying only emergency information, and includes a button operation panel. The operation information selected by the user operation determination device 22 is input to the display controller 15.

  The traffic safety level determination unit 23 determines the state of the vehicle such as whether the speed of the vehicle 1 is too high or whether the vehicle 1 is skidding, and outputs the result. Therefore, the data on the vehicle speed detected by the wheel speed sensor is inputted to the traffic safety degree determination unit 23 from the outside. The state of the host vehicle determined by the traffic safety level determination unit 23 is input to the display controller 15 as traffic safety information.

  Based on the operation information and the traffic safety information input from the user operation determination device 22 and the traffic safety level determination device 23, the display controller 15 commands (for example, data extraction conditions) about the configuration of the images to be displayed on the display devices 4-6. ) Is output to the data extraction function unit 11. Specifically, the display controller 15 instructs the data extraction function unit 11 not to draw a specific type of image based on the operation information or the traffic safety information, or displays the display 4 on the display memory 13. A command for selecting an image to be displayed on each of -6 is output.

  Specifically, storage position designation data for specifying where in the display memory 13 to store the image data and sound data is added by the display controller 15 to the image data and sound data extracted by the data extraction unit 10. The image is input to the display memory 13 and a display image is generated. The display image is transferred to the display memory area of the display memory 13 and is output to the display devices 4 to 6 via the display output generator 14 and the I / Fs 16 to 18.

  In this case, the display controller 15 stores the drawing data drawn by the image generator / changer 12 and stored in the display memory 13 at the memory address designated by the displays 4 to 6 in the display memory 13. A memory allocation command is added to the stored drawing data.

  Further, the display controller 15 designates which application is displayed at which memory location. Therefore, the display position of an app with a high priority is changed according to the priority (preference) of the driver's app. The display controller 15 grasps the importance of the data from the extracted data, and controls which data is displayed on which display device 4-6. If there are a plurality of displays 4 to 6, the data extraction unit 10 is controlled to display, for example, data important for driving on the displays 4 to 6 at a position close to the driver. That is, the display controller 15 constantly monitors where in the display memory 13 which image of which application is stored. As a result, switching of images to be displayed when necessary, switching of devices to be displayed, changing the size of the display image, changing the position of the display image, and switching the display transparency are performed.

  Furthermore, the display controller 15 provides the user with easy-to-see useful information from the indicators 4 to 6 according to the surrounding situation of the vehicle 1 and the driving situation of the own vehicle based on the operation information and the traffic safety information. For example, when there is a high possibility of a collision with an oncoming vehicle at an intersection or the like (the collision detection system of the vehicle 1 determines the possibility of a collision), the display controller 15 preferentially displays an object with a high possibility of a collision. Instructed to display (notify), and provide support to prevent the user from collision. If the vehicle 1 is equipped with a HUD (head-up display), the collision target can be highlighted on the HUD.

  When only one display 4 to 6 is mounted on the vehicle 1, the display controller 15 installs the most important information on the uppermost layer of the image, increases the transparency of other images, You can make the top layer easier to see.

  For example, even when processing an image of a vehicle-mounted camera, the same processing as described above can be performed if data is communicated in packets.

  The on-vehicle device request unit 24 outputs the audio data extracted by the data extraction unit 10 to the audio controller 25 and outputs the audio data to the audio 27 mounted on the vehicle 1 via the I / F 26.

  The above is the overall configuration of the DSRC in-vehicle device 3 according to the present embodiment. Although the DSRC in-vehicle device 3 has a standard specification, it is expected that each manufacturer has an additional function. Therefore, when the DSRC in-vehicle device 3 is installed (fixed) in the vehicle 1, the manufacturer and the product specification are read from the received data DB unit 9 by the data extraction unit 10 and set in the data extraction unit 10.

  Next, the operation of the DSRC in-vehicle device 3 will be described with reference to FIGS. FIG. 3 is a flowchart showing the contents of received data processing in the DSRC in-vehicle device 3. FIG. 4 is a diagram showing a flow of received data processed by the DSRC in-vehicle device 3. FIG. 5 is a flowchart showing the processing contents of the display controller 15 in the DSRC in-vehicle device 3.

  As shown in FIG. 3, when the DSRC in-vehicle device 3 is activated, first, the increase / decrease of the communication device is checked (step 100). The communication device corresponds to the display devices 4 to 6 in this embodiment, and the number of the display devices 4 to 6 is increased, the operation is checked, and the diagnosis is performed. This is because the data extraction function unit 11 reads the circuit configuration of image data processing corresponding to the displays 4 to 6 from the reception data DB unit 9 and performs a circuit configuration for processing the image data in the data extraction unit 10. .

  Subsequently, it is determined whether or not there is a data extraction request from the communication device, that is, the displays 4 to 6 (step 101). If there is no data extraction request, it is continuously determined whether or not there is a data extraction request. If there is a data extraction request, whether the data extraction circuit, that is, the data extraction function unit 11 can extract data from the received data is compared with a software version or the like (Step 102).

  When the data extraction function unit 11 can extract data, the requested data extraction condition of the communication device (display devices 4 to 6) is read from the display controller 15 (step 103).

  Then, the data extraction function unit 11 performs a data extraction process on the received data (step 104). Specifically, as shown in FIG. 4, image data, audio data, and application data are extracted from the received data, and these become extracted data. When the synchronization between the sound and the image is necessary, the time code included in the extracted data is read, and the sound and the image are uttered and displayed without a sense of incongruity.

  The extracted data is intermediate data in which application information and data for setting the memory setting position of the display memory 13 are additionally recorded. As application information, an application ID included in the received data is used. When the extracted data is encoded by compression or setting data, decompression and data allocation are performed and the original image data is restored. Then, the display controller 15 is requested to display additional data for the extracted data. Further, the display controller 15 adds information on which position of the display 4 to 6 the intermediate data is written to the memory. This intermediate data is input from the data extraction function unit 11 to the display controller 15 (step 105).

  At this time, the image data is drawn in an off-screen bitmap in the display memory 13 as shown in FIG. The image of the pre-display data is drawn on the display memory 13 and stored in the display memory 13 as drawing data.

  Next, when the data extraction function unit 11 receives a display command to be added to the image data from the display controller 15 (step 106), data in which the additional data is added to the extracted data is created (step 107), and the display 4 The added data is transferred to .about.6 (step 108). On the other hand, when the data extraction function unit 11 does not receive a display command to be added to the image drawing data from the display controller 15 (step 106), the added data is directly transferred to the displays 4 to 6 (step 108).

  As a result, as shown in FIG. 4, the image drawn in the display memory 13 is replaced and displayed at the display position of the image in the screen bitmap displayed on the display devices 4 to 6.

  That is, the display devices 4 to 6 read the memory setting position of the pre-display data from the data extraction unit 10 and arrange the image data at the position. Normally, as described above, when image drawing data is arranged at a position that is not directly displayed in the display memory 13 and image display is required, an instruction “what data of the application is to be displayed” is issued, and the corresponding image is displayed. The drawing data is transferred to the display devices 4 to 6 and image display is performed. At this time, the sound data is transferred to the audio 27 together with the image drawing data, and the sound is reproduced at a designated timing.

  If data extraction cannot be performed by the data extraction function unit 11 in step 102, it is determined whether or not the vehicle 1 is provided with the updater of the data extraction circuit (step 109). Since the vehicle 1 has a software download management function for storing update data, when the version of software corresponding to the vehicle is provided, the data extraction circuit is updated by the software (step 110). ). Then, as described above, the processing after step 103 is executed.

  On the other hand, if the own vehicle is not provided with update data, a request for transmitting corresponding software is created in the data extraction unit 10 and a request for transmission is made to the center via the roadside device 2 (step 111). Pending notification is made as information transmission such as request again after a minute (step 112). Thereafter, when the software is transmitted from the roadside device 2 and received by the DSRC in-vehicle device 3, steps 100, 101, 102, 109, and 110 shown in FIG. 3 are executed, and the steps after step 103 are executed. Thus, the image display process is performed.

  In the operation of the DSRC in-vehicle device 3 as described above, processing of the display controller 15 will be described. FIG. 5A is a flow when it is determined in step 100 shown in FIG. 3 that there has been an increase / decrease in the indicators 4-6, and FIG. 5B is from the traffic safety degree determiner 23 shown in FIG. It is the flow which showed the process according to the traffic safety information input into the display controller. These processes shown in FIGS. 5A and 5B are performed in parallel.

  In the process shown in FIG. 5A, first, the display controller 15 determines whether image information is received from the data extraction unit 10 (step 200). That is, it is monitored whether the image data extracted from the received data is input to the display controller 15.

  The display controller 15 issues data to be added to the extracted data. That is, the display controller 15 constantly monitors data related to display, and manages the operation status of the display memory 13 related to images to be appropriate.

  When the image data is input, the display controller 15 reads the application ID and the image data writing position from the image data (step 201), and performs a writing process on the off-screen bitmap of the display memory 13 (step 202). . Thus, the process ends.

  On the other hand, the display controller 15 executes the following processing in parallel with the above processing. First, in accordance with the traffic safety information input from the traffic safety level determination unit 23, the safety level (safety determination level, driving situation mode, danger mode) of the vehicle 1 is monitored (step 300), and display priority update processing is performed (step 300). Step 301).

  Specifically, the display priority is determined by assigning the order of display priority apps from the safety determination result and associating each app ID with an image managed in the display memory 13. Then, how the image is displayed on the plurality of indicators 4 to 6 in the vehicle is determined so as to match the display priority. For example, when the speed of the vehicle 1 is increased, priority is given to display of an image related to the safety level.

  In addition to the above, when the display controller 15 receives a display request related to the vehicle-mounted device from another vehicle-mounted device, the display controller 15 can also form a display image for the vehicle-mounted device and provide it to the user. Therefore, the display controller 15 includes a standard image component DB and a background image DB.

  If there is a change in the display priority of the image (step 302), the display controller 15 changes the display to match the priority (step 303). Thereby, an image that has not been displayed until now is displayed, the display position of the image is changed, or the transparency of the image is changed. Thus, the process ends.

  On the other hand, if there is no change in the display priority of the image, it is continuously monitored whether or not the display priority update process has been performed (steps 301 and 302).

  Normally, the process shown in FIG. 3 is executed, but the process shown in FIG. 3 is executed according to the process of the display controller 15 shown in FIG.

  As described above, in the present embodiment, the DSRC in-vehicle device 3 receives a transmission signal transmitted from the roadside device 2, extracts image data from the transmission signal, and performs image drawing based on the image data. The data extraction unit 10 is provided.

  Thereby, an image can be drawn by the DSRC in-vehicle device 3 without mounting a navigation device having a drawing function on the vehicle, and an image can be displayed on each of the displays 4 to 6 mounted on the vehicle 1. it can.

  In this case, an image to be displayed on the display devices 4 to 6 is drawn in advance as an off-screen bitmap in the display memory 13 of the data extraction unit 10, and the drawn image is displayed on the display devices 4 to 6. Yes. Accordingly, the entire image can be displayed on the display devices 4 to 6 regardless of the image drawing performance and the signal transfer capability, and flickering of the image can be eliminated.

  In the above embodiment, the dedicated data extraction unit 10 can be created by software for each communication device. Thereby, even if the number of communication devices increases, a circuit corresponding to the increased communication devices can be created by the program logic. In this case, a command created by the display controller 15 so that the display can be completed, for example, by adding to the extracted data where to store the image data in the display memory 13 to create intermediate data. The processing of the displays 4 to 6 can be simplified.

  In addition, it is possible to easily perform priority display of necessary images according to the surrounding safety level, that is, according to an in-vehicle application that performs safety evaluation.

  Note that the steps shown in each figure correspond to means for realizing the function, and each step in the flowcharts shown in FIGS. 3 and 5 can be configured as hardware.

It is a whole lineblock diagram of a display system provided with a DSRC in-vehicle device concerning one embodiment of the present invention. It is a block block diagram of a DSRC in-vehicle device. It is a flowchart which shows the content of the process of the reception data in a DSRC vehicle-mounted apparatus. It is the figure which showed the flow of the reception data processed with a DSRC vehicle-mounted apparatus. It is a flowchart which shows the content of the process of a display controller among DSRC vehicle-mounted apparatuses.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Roadside machine, 3 ... DSRC vehicle-mounted apparatus, 4-6 ... Display, 7 ... Receiver, 9 ... Received data DB part, 10 ... Data extraction part, 11 ... Data extraction function part, 12 ... Image Generator / changer, 13 ... display memory, 15 ... display controller, 16-18 ... I / F, 23 ... traffic safety level determination device.

Claims (4)

A receiver (7) for receiving a transmission signal including image data transmitted from the roadside machine (2);
A data extraction unit (10) for extracting the image data from the transmission signal received by the receiver (7) and drawing an image to be displayed on the plurality of displays (4 to 6) based on the image data. When,
A display controller (15) for outputting a data extraction condition for rendering an image to be displayed on the plurality of displays (4 to 6) to the data extraction unit (10);
The data extraction unit (10)
A data extraction function unit (11) for selecting information to be displayed on the plurality of indicators (4 to 6) based on the data extraction condition input from the display controller (15);
An image generation unit (12) for drawing an image using the information selected by the data extraction function unit (11) and the image data;
A display memory (13) for storing drawing data of the image drawn by the image generation unit (12),
The drawing data stored in the display memory (13) is input to the plurality of displays (4 to 6) so that an image is displayed.
The data extraction unit (10) examines increase / decrease in the number of the plurality of indicators (4-6) connected via a plurality of interfaces (16-18), and the data extraction function unit (11) according to the increase / decrease. ) Reads out the circuit configuration for processing the image data corresponding to the plurality of displays (4 to 6) from the received data DB unit (9) for storing the circuit configuration for processing the image data. A DSRC in-vehicle device that is characterized. The data extraction function unit (11) reads out the circuit configuration from the reception data DB unit (9) that stores the circuit configuration for processing image data, and generates the circuit configuration in the data extraction unit (10). The DSRC in-vehicle device according to claim 1 , wherein The display controller (15) inputs the determination result of the traffic safety level determination device (23) for determining the traveling state of the vehicle (1), and the plurality of display devices (4 to 6) based on the determination result. The priority of the image to be displayed is determined, and the priority of the image is input to the data extraction function unit (11), so that the data extraction function unit (11) selects the image with the higher priority. The DSRC in-vehicle device according to claim 1 or 2 , wherein the device is configured as described above. A DSRC in-vehicle device according to any one of claims 1 to 3 ,
A roadside device (2) that is provided along a passage through which the vehicle (1) passes, and that transmits a transmission signal including the image data;
A display system including the plurality of displays (4 to 6) mounted on the vehicle (1) and displaying an image of image drawing data input from the DSRC in-vehicle device.

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