JP5183308B2 - In-vehicle display control device, in-vehicle control system - Google Patents

Description

  The present invention relates to a display control device and a control system that are used in a vehicle.

  2. Description of the Related Art Conventionally, an in-vehicle display device that adjusts the brightness of a display monitor according to the lighting state of a vehicle headlamp is known. Furthermore, a navigation device is also known that receives a GPS signal transmitted from a GPS satellite to determine day and night regardless of the lighting state of the headlamp, and adjusts the brightness of the display monitor (see Patent Document 1).

JP 2000-292198 A

  In recent vehicles, a communication network called CAN (Controller Area Network) is built inside in order to transmit necessary information between various devices mounted on the vehicle. The conventional in-vehicle display device determines the lighting state of the headlamp based on the information transmitted through the CAN. However, when the vehicle engine is stopped, information is not transmitted / received to / from the navigation device via the CAN, so that the lighting state of the headlamp cannot be determined in the in-vehicle display device. Further, according to the navigation device disclosed in Patent Document 1, the brightness of the display monitor is adjusted according to the day / night judgment result based on the received GPS signal regardless of the lighting state of the headlamp. Therefore, the brightness adjustment is not necessarily performed as intended by the user. Thus, in the conventional method, the brightness of the display monitor may not be adjusted appropriately.

An in- vehicle display control device according to the invention according to claim 1 is an illumination signal detecting means for detecting an illumination signal indicating a lighting state of a headlamp of a vehicle, and a receiving means for receiving communication data including information relating to the lighting state of the headlamp. Based on the illumination signal detected by the illumination signal detection means or the communication data received by the reception means, a display control means for controlling the brightness of the display monitor and an ignition signal indicating the operating state of the vehicle engine are detected. An ignition signal detection unit; and a determination unit that determines whether or not the engine is operating based on the ignition signal detected by the ignition signal detection unit. The determination unit determines that the engine is operating. If the display control means is communication data Based brightness of the display monitor and control, when it is determined that the engine is not in operation by the determining means, display control means, and controlling the brightness of the display monitor based on the illumination signal.
The in-vehicle display control apparatus according to the invention according to claim 2 is the in-vehicle display control apparatus according to claim 1, wherein the headlamp includes a main lamp and a small lamp, and the determination means determines that the engine is not operating. The display control means determines whether or not the main lamp is lit based on the illumination signal, and displays a predetermined warning on the display monitor when it is determined that the main lamp is lit. .
A vehicle-mounted control system according to a third aspect of the present invention includes a vehicle-mounted display control device according to the first or second aspect, a headlamp control device that switches the lighting state of the headlamp according to a user operation, and a headlamp Illumination signal output device that outputs an illumination signal to the in-vehicle display control device according to the lighting state, a communication network that connects a plurality of devices including the in-vehicle display control device, and communication data according to the lighting state of the headlamp And a communication control device that transmits to the in-vehicle display control device via a network.

  According to the present invention, the brightness of the display monitor can be adjusted appropriately.

  A configuration of an in-vehicle control system according to an embodiment of the present invention is shown in FIG. The vehicle-mounted control system mounted on the vehicle 100 includes a navigation device 1, a headlamp switch 2, a headlamp 3, a headlamp control device 4, and an ignition switch 5.

  The navigation device 1 has a navigation function for guiding the vehicle 100 to a destination. That is, the navigation device 1 displays a map based on the map data, detects the position of the vehicle 100, that is, the vehicle position, and indicates the vehicle position on the map. When the destination is set by the user's operation, a recommended route to the destination is searched based on the map data, and the vehicle 100 is guided to the destination according to the searched recommended route. Further, the navigation device 1 adjusts the brightness of the display screen based on an illumination signal, CAN communication data, and an ignition signal, which will be described later. The specific method will be described in detail later.

  The headlamp switch 2 is installed near the driver's seat of the vehicle 100 and is operated by a driver of the vehicle 100 as a user. The operation state of the headlamp switch 2 is switched according to a user operation. Specifically, an operation position (off position) for turning off the headlamp 3, an operation position (small position) for turning on the small lamp of the headlamp 3, or a main lamp of the headlamp 3 is turned on. The user can switch the operation position of the headlamp switch 2 to any one of the operation positions (on positions).

  A signal indicating the operation state of the headlamp switch 2 is output from the headlamp switch 2 to the headlamp control device 4 and also to the navigation device 1 as an illumination signal. That is, the headlamp switch 2 outputs an illumination signal to the navigation device 1 according to the lighting state of the headlamp 3. When the operation position of the headlamp switch 2 is the off position, the illumination signal may not be output from the headlamp switch 2.

  The headlamp 3 is installed at the front portion of the vehicle 100. The lighting state of the headlamp 3 is controlled by the headlamp control device 4. The headlamp 3 includes a main lamp that is lit to irradiate the front of the vehicle 100 and a small lamp (vehicle width lamp) that is lit to allow a driver of another vehicle to identify the vehicle 100.

  The headlamp control device 4 controls the lighting state of the headlamp 3 according to the operation state of the headlamp switch 2 by the user. That is, the headlamp 3 is turned off when the operation position of the headlamp switch 2 is the off position, the small lamp of the headlamp 3 is turned on when the operation position is the small position, and the main lamp 3 is turned on when the operation position is the on position. The headlamp 3 is controlled by the headlamp control device 4 so that the lamp is lit. In this way, the headlamp control device 4 switches the lighting state of the headlamp 3 in accordance with a user operation performed using the headlamp switch 2.

  The lighting state of the headlamp 3 controlled by the headlamp control device 4 is transmitted from the headlamp control device 4 to the navigation device 1 as CAN communication data. This CAN communication data is provided in the vehicle 100 and transmitted via a CAN that is a communication network that connects devices including the navigation device 1, the headlamp control device 4, an ECU (Engine Control Unit) (not shown), and the like. Is done. That is, the headlamp control device 4 transmits CAN communication data to the navigation device 1 via the CAN according to the lighting state of the headlamp 3. If the headlamp 3 is turned off, the CAN communication data may not be transmitted from the headlamp control device 4.

  The ignition switch 5 is configured integrally with a key slot installed in the vicinity of the driver's seat of the vehicle 100, and is operated by a driver of the vehicle 100 as a user. The operation state of the ignition switch 5 is switched according to the user's operation. Specifically, an operation position (off position) for stopping the engine of the vehicle 100 (not shown), an operation position (accessory position) for operating the electrical components of the vehicle 100 with the engine stopped, and the engine are operated. Therefore, the user can switch the operation position of the ignition switch 5 to one of the operation positions (on position).

  The operation state of the ignition switch 5 is output to the navigation device 1 by an ignition signal. The content of the ignition signal changes according to the operation state of the ignition switch 5, that is, the operation state of the engine of the vehicle 100. In other words, the ignition switch 5 outputs an ignition signal indicating the operating state of the engine of the vehicle 100 to the navigation device 1. When the operation position of the ignition switch 5 is the off position, the ignition signal may not be output from the ignition switch 5.

  FIG. 2 is a diagram illustrating a configuration of the navigation device 1. The navigation device 1 includes a control unit 10, a vibration gyro 11, a vehicle speed sensor 12, a hard disk (HDD) 13, a GPS receiving unit 14, a VICS (Vehicle Information and Communication System) (registered trademark) information receiving unit 15, a display monitor 16, and a speaker. 17 and an input device 18.

  The control unit 10 includes a microprocessor and its peripheral circuits, RAM, ROM, and the like. The control unit 10 executes various processes for realizing the navigation function as described above based on the control program and map data recorded in the ROM or the HDD 13. Further, the control unit 10 detects the illumination signal output from the headlamp switch 2 and the ignition signal output from the ignition switch 5, and also transmits CAN communication data transmitted from the headlamp control device 4 via CAN. Receive. And based on these contents, the process which adjusts the brightness | luminance of the display monitor 16 is performed. The specific contents of the processing executed at this time will be described later using a flowchart.

  The vibration gyro 11 is a sensor for detecting the angular velocity of the vehicle 100. The vehicle speed sensor 12 is a sensor for detecting the traveling speed of the vehicle 100. The angular velocity of the vehicle 100 detected by the vibration gyro 11 and the traveling speed of the vehicle 100 detected by the vehicle speed sensor 12 are output to the control unit 10.

  The HDD 13 is a nonvolatile recording medium capable of holding recorded data. Various data including map data is recorded in the HDD 13. Data recorded in the HDD 13 is read out under the control of the control unit 10 as necessary, and is used for various processes and controls executed by the control unit 10. The map data recorded on the HDD 13 includes route calculation data, road data, and background data. The route calculation data is data used when the control unit 10 performs a process of searching for a recommended route to the destination, and represents the time required for passing for each road. The road data represents a road shape or the like when displaying a map. The background data represents the shape of map elements other than roads, such as rivers, railways, and various facilities (landmarks).

  The GPS receiver 14 receives a GPS signal transmitted from a GPS satellite and outputs it to the controller 10. The GPS signal includes the position and transmission time of the GPS satellite that transmitted the GPS signal as information for obtaining the position of the vehicle and the current time. The current position of the vehicle is based on the angular velocity of the vehicle output from the vibration gyro 11, the traveling speed of the vehicle output from the vehicle speed sensor 12, the GPS signal output from the GPS receiver 14, the map data recorded in the HDD 13, and the like. Thus, it is obtained by the control unit 10 every predetermined time.

  The VICS information receiving unit 15 receives VICS information transmitted from the VICS center to the navigation device 1. With this VICS information, various road traffic information such as traffic jam information, traffic regulation information, and parking lot information is transmitted to the navigation device 1. The VICS information received by the VICS information receiving unit 15 is output to the control unit 10 and used when the control unit 10 searches for a recommended route, and the contents thereof are displayed on the display monitor 16.

  The transmission of VICS information from the VICS center to the navigation device 1 is performed mainly by radio wave beacons installed on highways, optical beacons installed mainly on general roads, or FM multiplex broadcasting. . The radio wave beacon and the optical beacon transmit VICS information locally to the vehicle passing near the installation point by radio waves or light (infrared rays). In contrast, FM multiplex broadcasting can transmit VICS information to a relatively wide area.

  The display monitor 16 displays various images and videos such as map images under the control of the control unit 10. The display monitor 16 is installed at a position where it can be easily seen from the driver's seat, for example, on the dashboard of the host vehicle or in the instrument panel. The brightness of the display monitor 16 is adjusted by the control unit 10. For example, a liquid crystal display is used as the display monitor 16. The speaker 17 outputs route guidance voice and the like under the control of the control unit 10.

  The input device 18 is a device for a user to perform various input operations for operating the navigation device 1 and includes various input switches. The user operates the input device 18 to input, for example, the name of a facility or point desired to be set as the destination, select a destination from registered locations registered in advance, or select any map on the map. Or scroll in the direction. The input device 18 can be realized by an operation panel, a remote controller, or the like. Alternatively, the input device 18 may be a touch panel integrated with the display monitor 16.

  Next, a method for adjusting the brightness of the display monitor 16 in the navigation device 1 will be described. FIG. 2 is a flowchart of processing executed by the control unit 10 when adjusting the luminance of the display monitor 16. This flowchart will be described below.

  In step S10, the ignition signal output from the ignition switch 5 is detected. This ignition signal indicates the operating state of the engine of the vehicle 100 as described above.

  In step S20, it is determined based on the ignition signal detected in step S10 whether or not the engine of the vehicle 100 is operating. If the ignition signal indicates that the engine is operating, that is, if the operation position of the ignition switch 5 indicated by the ignition signal is the on position, the process proceeds to step S30. On the other hand, when the ignition signal indicates that the engine is stopped, that is, when the ignition signal is not output from the ignition switch 5, or the operation position of the ignition switch 5 indicated by the ignition signal is the off position or the accessory position. If so, the process proceeds to step S70.

  When it is determined in step S20 that the engine of the vehicle 100 is operating, in subsequent step S30, CAN communication data transmitted from the headlamp control device 4 via CAN is received. This CAN communication data includes information regarding the lighting state of the headlamp 3 as described above.

  In step S40, based on the CAN communication data received in step S30, it is determined whether or not the headlamp 3 is on. If the CAN communication data indicates that the headlamp 3 is lit, the process proceeds to step S50, and the display monitor 16 is displayed with low brightness in step S50. That is, when the headlamp 3 is on, it is considered that the vehicle 100 is traveling in a dark place such as at night or in a tunnel, so the brightness of the display monitor 16 is kept low so that the user is not dazzled.

  On the other hand, if the CAN communication data indicates that the headlamp 3 is not lit, the process proceeds from step S40 to step S60, and the display monitor 16 is displayed with high luminance in step S60. That is, when the headlamp 3 is not lit, it is considered that the vehicle 100 is traveling in a bright place in the daytime. If step S50 or step S60 is performed, the flowchart of FIG. 3 will be complete | finished.

  If it is determined in step S20 that the engine of the vehicle 100 is not in operation, an illumination signal output from the headlamp switch 2 is detected in the subsequent step S70. This illumination signal indicates the lighting state of the headlamp 3 as described above.

  In step S80, based on the illumination signal detected in step S70, it is determined whether or not the headlamp 3 is lit. If the illumination signal indicates that the headlamp 3 is lit, that is, if the operation position of the headlamp switch 2 indicated by the illumination signal is the on position or the small position, the process proceeds to step S90. On the other hand, when the illumination signal indicates that the headlamp 3 is not lit, that is, when the illumination signal is not output from the headlamp switch 2, or the operation position of the headlamp switch 2 indicated by the illumination signal is the off position. If YES, the process proceeds to step S120.

  In step S90, based on the illumination signal detected in step S70, it is determined whether or not the main lamp of the headlamp 3 is lit. If the illumination signal indicates that the main lamp of the headlamp 3 is lit, that is, if the operation position of the headlamp switch 2 indicated by the illumination signal is the on position, the process proceeds to step S100. On the other hand, when the illumination signal indicates that the main lamp of the headlamp 3 is not lit, that is, when the operation position of the headlamp switch 2 indicated by the illumination signal is the small position and the small lamp is lit. The process proceeds to step S110.

  In step S100, in order to warn the user that he has forgotten to turn off the headlamp 3, a predetermined forgetting to turn off warning is displayed on the display monitor 16. That is, if it is determined in step S20 that the engine of the vehicle 100 is not in operation, and it is further determined in step S90 that the main lamp is lit, the user operates the engine while the main lamp of the headlamp 3 is lit. Seems to have stopped. In such a case, a warning to forget to turn off is displayed to prevent the user from forgetting to turn off the headlamp 3. If step S100 is performed, the flowchart of FIG. 3 will be complete | finished.

  On the other hand, in step S110, as in step S50, the display monitor 16 is displayed with low luminance so that the user is not dazzled. In step S120, as in step S60, the display monitor 16 is displayed with high luminance so that the user can easily see it. If step S110 or step S120 is performed, the flowchart of FIG. 3 will be complete | finished.

According to the embodiment described above, the following operational effects are obtained.
(1) The navigation apparatus 1 detects the illumination signal output from the headlamp switch 2 by the process performed by the control unit 10 (step S70). Alternatively, the CAN communication data output from the headlamp control device 4 is received (step S30). Then, the brightness of the display monitor 16 is controlled based on the illumination signal detected in step S70 or the CAN communication data received in step S30 (steps S80, S90, S110, S120, S40, S50, and S60). Since it did in this way, the brightness | luminance of the display monitor 16 can be adjusted appropriately.

(2) The navigation device 1 detects an ignition signal output from the ignition switch 5 by processing performed by the control unit 10 (step S10), and whether the engine of the vehicle 100 is operating based on the detected ignition signal. It is determined whether or not (step S20). As a result, when it is determined that the engine is operating, the control unit 10 receives CAN communication data (step S30), and determines whether the headlamp 3 is lit based on the received CAN communication data. A determination is made (step S40), and the luminance of the display monitor 16 is controlled based on the determination result (steps S50 and S60). When it is determined that the engine is not operating, the control unit 10 detects an illumination signal (step S70), and determines whether the headlamp 3 is lit based on the detected illumination signal. (Step S80), the luminance of the display monitor 16 is controlled based on the determination result (Steps S110 and S120). Since it did in this way, even if it is a case where the engine of the vehicle 100 has stopped and information transmission / reception is not performed via CAN, according to the lighting state of the headlamp 3, the brightness | luminance of the display monitor 16 is appropriately set. Can be adjusted.

(3) When determining that the engine of the vehicle 100 is not operating in step S20, the control unit 10 determines whether or not the main lamp of the headlamp 3 is lit based on the illumination signal (step S90). . As a result, when it is determined that the main lamp is lit, a predetermined forgetting to turn off warning is displayed on the display monitor 16 (step S100). Since it did in this way, when a user stops an engine with the main lamp | ramp of the headlamp 3 turned on, it can prevent forgetting to turn off the headlamp 3, and can eliminate unnecessary battery consumption.

  In the embodiment described above, the example of controlling the luminance of the display monitor 16 in the navigation device 1 has been described. However, the present invention is not limited to this, and is applied to various in-vehicle display control devices. Is possible. That is, brightness control as described above can be performed in various in-vehicle display control devices that perform display control of a display monitor installed in a vehicle.

  The embodiment and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired.

  In the embodiment described above, the in-vehicle display control device is realized by the navigation device 1, and the illumination signal detection means, the reception means, the display control means, the ignition signal detection means, and the determination means are realized by the processing executed by the control unit 10, respectively. did. Further, the headlamp control device and the communication control device are realized by the headlamp control device 4, the illumination signal output device is realized by the headlamp switch 2, and the communication network is realized by CAN. However, these are merely examples, and when interpreting the invention, the correspondence between the items described in the embodiments and the items described in the claims is not limited or restricted.

It is a figure which shows the structure of the vehicle-mounted control system by one Embodiment of this invention. It is a figure which shows the structure of a navigation apparatus. It is a flowchart of the process performed when adjusting the brightness | luminance of a display monitor.

Explanation of symbols

1: navigation device, 2: headlamp switch, 3: headlamp,
4: Headlamp control device, 5: Ignition switch,
10: control unit, 11: vibration gyro, 12: vehicle speed sensor, 13: HDD,
14: GPS receiver, 15: VICS information receiver, 16: display monitor,
17: Speaker, 18: Input device, 100: Vehicle

Claims (3)

An illumination signal detecting means for detecting an illumination signal indicating a lighting state of a headlamp of the vehicle;
Receiving means for receiving communication data including information on the lighting state of the headlamp;
Display control means for controlling brightness of a display monitor based on the illumination signal detected by the illumination signal detection means or the communication data received by the receiving means ;
An ignition signal detecting means for detecting an ignition signal indicating an operating state of the engine of the vehicle;
Determination means for determining whether or not the engine is operating based on the ignition signal detected by the ignition signal detection means,
When the determination means determines that the engine is operating, the display control means controls the brightness of the display monitor based on the communication data,
The in-vehicle display control apparatus , wherein when the determination unit determines that the engine is not operating, the display control unit controls the luminance of the display monitor based on the illumination signal . The in-vehicle display control device according to claim 1 ,
The headlamp includes a main lamp and a small lamp,
When the determination means determines that the engine is not operating, the display control means determines whether or not the main lamp is lit based on the illumination signal, and the main lamp is lit. A vehicle-mounted display control device that displays a predetermined warning on the display monitor when it is determined that the display is present. The in-vehicle display control device according to claim 1 or 2 ,
A headlamp control device that switches a lighting state of the headlamp according to a user operation;
An illumination signal output device that outputs the illumination signal to the in-vehicle display control device according to the lighting state of the headlamp;
A communication network for connecting a plurality of devices including the in-vehicle display control device;
A vehicle-mounted control system comprising: a communication control device that transmits the communication data to the vehicle-mounted display control device via the communication network according to a lighting state of the headlamp.

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