JP2011218889A - Speed display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed display device for a vehicle enabling the user to recognize whether a target speed surpasses a present limit speed or not according to a change in the limit speed.SOLUTION: This speed display device for a vehicle including a display unit capable of properly displaying an acquired vehicle speed, a target speed and a limit speed, includes a determination unit for determining whether the target speed surpasses the limit speed or not and a control unit. When it is determined by the determination unit that the target speed surpasses the limit speed (S3: YES), the control unit displays the vehicle speed on the display unit and informs the information by which the occupant of the vehicle can know that the target speed surpasses the limit speed (S4). Since the speed information which the user receives when the target speed surpasses the limit speed and the speed information which the user receives when the target speed does not surpass the limit speed are different from each other, the user can know an attention to the target speed from the difference between the pieces of the speed information.

Description

  The present invention relates to a vehicle speed display device that displays the speed of a vehicle.

  2. Description of the Related Art Conventionally, in order to reduce driver fatigue, automatic driving control techniques such as auto cruise control that automatically controls an accelerator so as to maintain a preset vehicle speed are known.

  This automatic travel control realizes a function in which a user (vehicle occupant) sets a target speed in advance, brings the actual vehicle speed closer to the set target speed, and maintains the target speed when the target speed is reached.

  A vehicle speed display device that makes it easy to see the current traveling state by displaying the control state and target speed of such automatic traveling control on a speedometer is known (for example, see Patent Document 1).

JP 2006-256445 A

  By the way, considering the environment in which the vehicle actually travels, the speed limit may change when the current position changes as the vehicle travels. For example, when a vehicle moves from a highway (restricted speed: 80 km / h) to a general road (restricted speed: 50 km / h), or when the restricted speed of the highway changes from 80 km / h to 60 km / h due to sudden heavy rain Etc. are assumed.

  And when auto cruise control is being executed when this speed limit changes, the target speed maintains the value set by the user, so if the target speed exceeds the speed limit of the running road Some kind of response is necessary.

  However, in such a case, the conventional vehicle speed display device has a problem that makes the user feel inconvenient because no specific measures are taken so that the user can recognize that the target speed exceeds the speed limit. It was.

  Therefore, the present invention provides a vehicle speed display device that allows a user to recognize whether or not a target speed exceeds a current speed limit in response to a change in speed limit.

  In order to solve the above-described object, the vehicle speed display device according to claim 1 includes determination means for determining whether or not the target speed exceeds the speed limit, and control means, and the control means includes determination means. When it is determined that the target speed exceeds the speed limit, the vehicle speed is displayed on the display means and information recognizable by the vehicle occupant is notified.

  According to this configuration, when the target speed exceeds the speed limit, a user (meaning a vehicle occupant) can know information exceeding the speed limit by notification. Therefore, in response to changes in the speed limit, the speed information that can be received by the user differs between the case where the target speed exceeds the current speed limit and the case where the target speed does not exceed the current speed limit. The user can recognize the attention to the target speed from the difference in the speed information.

  Further, according to the vehicle speed display device of the second aspect, a value lower than the acquired speed limit by a predetermined value is set as the speed limit.

  According to this configuration, since the user can be notified before the acquired speed limit is reached, it is possible to take measures so that the user can operate to reset the target speed, cancel the setting, or the like with ease.

  That is, the predetermined value means predetermined value = (acquired speed limit) − (vehicle speed at which the user can secure a time that can be dealt with with ease before the vehicle reaches the acquired speed limit).

  According to the vehicle speed display device of the third aspect, the notification is performed using at least one of display, sound, and voice.

  According to this configuration, the user can recognize attention to exceeding the target speed by using visual or auditory sense.

  According to the vehicle speed display device of the fourth aspect, the control means simultaneously displays the vehicle speed and information recognizable by the vehicle occupant on the display means.

  According to this configuration, the user can visually confirm the caution about exceeding the target speed instantly.

  According to the vehicle speed display device of the fifth aspect, the control means displays the range of the difference between the target speed and the speed limit on the display means in a color different from that around the range.

  According to this configuration, rather than displaying both the target speed and the speed limit on the display means with numbers, letters, and arrow lines, the user knows that the speed limit has been exceeded by coloring and displaying the difference range. And can see how much has been exceeded at the same time, making it more intuitive and instantly recognizing attention.

It is a block diagram which shows the speed display apparatus for vehicles which concerns on this invention. It is a flowchart explaining the process regarding the speedometer which concerns on this invention. It is a display example of the speed meter of the vehicle speed display device corresponding to step S2 of FIG. It is a display example of the speed meter of the vehicle speed display device corresponding to step S4 of FIG. It is a display example of the speed meter of the vehicle speed display device corresponding to step S6 of FIG. It is a display example of the speed meter of the vehicle speed display device corresponding to step S8 of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a vehicle speed display device according to the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram of a vehicle speed display device according to this embodiment.

  Inside the vehicle speed display device 1, an electronic control device 2 (corresponding to display control means and determination means of the present invention), a display unit 3 (corresponding to display means of the present invention), and a warning unit 4 provide electrical wiring. Via a communicable connection.

  In addition, the electronic control device 2 includes a speed limit acquisition unit 5 (corresponding to the speed limit acquisition means of the present invention) outside the vehicle speed display device 1 and a plurality of in-vehicle device control devices 6. Are connected via an area network). The speed limit acquisition unit 5 and the plurality of in-vehicle device control devices 6 connected via the in-vehicle LAN are collectively referred to as “external device”.

  Furthermore, the electronic control unit 2 is connected to the target speed input unit 7 (corresponding to the target speed acquisition means of the present invention) via an electric wiring so as to be communicable.

  The electronic control unit 2 is configured as a well-known normal microcomputer, and includes a ROM (not shown) that is a memory that stores a program describing processing contents and a RAM that temporarily stores data. Further, although not shown in the figure, the CPU includes a CPU that executes a program stored in the ROM, a timer counter that measures time, and a component that mainly includes an interface unit having a communication driver and a communication controller for communicating with an external device. Yes.

  The ROM stores a program for processing the received signal, a program for performing display processing on the display unit 3, and a program for issuing a command for issuing a warning to the warning unit 4 when a predetermined condition is met. Has been. The RAM has a function of storing data such as data results calculated by the CPU and speed information acquired from an external device.

  The display unit 3 receives a processing signal from the electronic control unit 2 and displays information necessary for the vehicle on each instrument. Here, a speed meter 31 (corresponding to a speed meter of the present invention) indicating the vehicle speed, a rotation meter 32 indicating the engine speed, a fuel meter 33 indicating the remaining amount of fuel in the fuel tank, and a radiator coolant temperature are shown as instruments. A water temperature gauge 34 is displayed.

  In addition, since the detection method of each of the rotation meter 32, the fuel gauge 33, and the water temperature gauge 34 uses the well-known thing, since it is not directly related to this invention, detailed description is abbreviate | omitted here.

  Further, the display method of the display unit 3 is not particularly limited, but in the present embodiment, the display unit 3 is configured by using a display device using liquid crystal for the display unit. This device displays each instrument by color-coded display or gradation display. Further, the display device is not limited to liquid crystal, and may be an organic EL or a cathode ray tube as long as the same color and gradation can be displayed. Alternatively, use a device that uses images such as liquid crystal for only the places where the expression (color, image, scale, etc.) needs to be changed within each instrument, and the machine where there is no need to change the expression. It may be displayed.

  The warning unit 4 has a voice output unit such as a speaker, and warns the driver by receiving a processing signal from the electronic control device 2 and generating a sound or voice such as a predetermined single tone. (The sound or sound emitted from the warning unit 4 and the display in the instrument of the display unit 3 correspond to the notification of the present invention).

  The speed limit acquisition unit 5 has a function of acquiring the speed limit of the traveling road that is running. The speed limit acquisition unit 5 stores in advance a legally limited speed of the traveling road in a database (not shown), and acquires the current position of the vehicle based on information from a GPS receiver (not shown) while the vehicle is traveling. Then, the speed limit obtaining unit 5 searches the database for the legal speed limit of the traveling road corresponding to the current position. The speed limit acquisition unit 5 transmits the speed information of the legal speed limit obtained as a result of the search to the electronic control unit 2. The timing for transmitting the current speed limit to the electronic control unit 2 may be every time the current position changes, may be when the speed limit changes, or may be a predetermined time in units of several seconds. It may be an interval.

  More specific means for realizing the speed limit acquisition unit 5 is described in Japanese Patent Application Laid-Open No. 2007-199026, and thus detailed description thereof is omitted here.

  Furthermore, the legal speed limit acquired by the above-described method may be a value that is lower than the acquired speed limit by a predetermined value (corresponding to the predetermined value of the present invention) as the speed limit. The predetermined value is obtained by a predetermined value = (acquired speed limit) − (vehicle speed at which the user can secure a time that can be dealt with with ease before the vehicle reaches the acquired speed limit). ing.

  Further, the value of the speed limit is not limited to the method based on the above-mentioned statutory speed limit, and the speed limit may be arbitrarily varied by acquiring region information of the current position of the vehicle. For example, in an urban area with many people and cars, to prompt the user (equivalent to the vehicle occupant of the present invention) to set the target speed earlier so as not to cause a collision accident to people or cars that jump out, A value slightly lower than a predetermined speed limit (travel speed assumed to be safe in the area, for example, 40 km / h) (corresponding to a value lower than the predetermined value of the present invention, for example, 5 km / h) is set to a speed limit (40 km / h). h-5 km / h = 35 km / h). On the other hand, in a mountain road area where there are few people and cars, a speed limit determined in advance for each area (for example, a legal speed limit for that area) may be used as it is. In the same manner, the speed limit may be varied not only in the area but also in a time zone where traffic congestion is large or small (for example, speed limit = statutory speed−5 km / h in a traffic jam). As described above, by changing the speed limit according to the surrounding environment of the vehicle, the user can know at the necessary timing that the region or time zone has been switched to a situation to be careful. In addition, by setting whether or not to use a value that is lower by a predetermined value depending on the surrounding environment of the vehicle, it is possible to secure time to consider resetting or canceling the target speed as necessary, making setting operations safer It can be carried out.

  By using a value that is lower than the acquired speed limit by a predetermined value as the speed limit, the user can be alerted before the acquired speed limit is reached, and the user can afford the target speed with caution. It is possible to cope with operations such as resetting or canceling settings. An example of the predetermined value will be specifically described. For example, the predetermined value is a predetermined value for each speed limit. For example, if the speed limit is 40 km / h, the predetermined value is set to 5 km / h and the new speed limit is set to 35 km / h. If it is 60 km / h, the predetermined value is set to 10 km / h, and the new speed limit is set to 50 km / h. If the speed limit is 80 km / h, the predetermined value is set to 15 km / h, and the new speed limit is set to 65 km / h. In this way, each time the speed limit increases, the amount of the predetermined value is increased to allow time for the user. However, the method of allowing the user to deal with the speed limit is not limited to this. For example, the same predetermined value (a predetermined value having the largest absolute value in the setting, for example, 15 km / h, regardless of the acquired speed limit). ) May be used as the speed limit.

  As described above, the speed limit may be a legal speed limit value or a value that is uniquely determined based on region or time zone information, and is a value that is a predetermined value lower than these values. There may be.

  The in-vehicle device control device 6 includes a plurality of control devices for controlling the traveling of the vehicle. Examples of the control device include an engine control device that controls the engine, an auto cruise control device that performs automatic travel control for causing the vehicle to follow the preceding vehicle or travel at a constant speed based on a user input instruction, and an automatic transmission. There are control devices in the field of vehicle control systems, such as an ECT (Electronic Controlled Transmission) control device that performs a shift control of the vehicle and a brake control device that controls a brake. There are also control devices in the field of information systems such as a navigation control device that controls a navigation device, an audio control device that controls audio equipment, and a control device that controls a telephone device. In addition, a power supply control device that performs control for managing the power of the vehicle-mounted battery, a body control device that controls locking / unlocking of the door, and the body control device based on the radio wave transmitted from the electronic key possessed by the vehicle driver. There is a control device in the field of body electrical components such as a smart key control device that instructs locking / unlocking of a door or permitting engine start based on a driver's operation.

  Among these, the ECT control device including a vehicle speed sensor that detects a pulse signal for determining the vehicle speed transmits vehicle speed information from the vehicle speed sensor to the electronic control device 2 (corresponding to the vehicle speed acquisition means of the present invention). In addition, from the auto cruise control device having an input switch for starting operation and setting target speed, the speed information of the target speed set by the user's switch operation is transmitted to the electronic control device 2 together with the information on the start or stop of the automatic travel control. To do.

  When the user sets the target speed for the automatic travel control, the user sets the target speed by pressing an input switch provided on the vehicle handle (not shown) (corresponding to the target speed input unit 7 and the target speed acquisition means of the present invention). ). Specifically, when the user reaches the desired vehicle speed by operating the accelerator pedal or the brake pedal, the user presses an input switch provided on the steering wheel. The auto-cruise control device sets the desired vehicle speed as a target speed based on an instruction from the input switch.

  The target speed input unit 7 is a device that sets a target speed that the user wants to use as a guide during driving by an input operation when the automatic driving control is stopped. As an input operation method, although not shown, for example, a device having a function of communicating with a numerical input key, a determination key, a release key for a target set value, a display unit indicating the state of the number, and the electronic control unit 2 Therefore, it is installed within the reach of the driver, for example, near the instrument panel.

  The user manually inputs a desired target speed number and presses the enter key to transmit speed information of the target speed and information indicating that setting of the target speed is started to the electronic control unit 2.

  Further, when the setting of the target speed is to be stopped, information indicating that the setting of the target speed has been stopped is transmitted to the electronic control unit 2 by the user pressing the release key.

  As described above, the target speed is the target speed that is set based on the instruction of the input switch of the user during the automatic driving control, and when the automatic driving control is stopped, the user is uniquely independent of the driving state. The determined value is used as the target speed.

  And the electronic control apparatus 2 which received various information from the speed limit acquisition part 5, the some vehicle equipment control apparatus 6, and the target speed input part 7 displays on the speed meter 31 of the display part 3 based on the received information. The video information to be transmitted is transmitted to the display unit 3. In addition, by using a liquid crystal device for the display unit 3 as described above, for example, the speed meter 31 can appropriately display the target speed, the limit speed, and the vehicle speed as an image.

  Next, processing related to the display of the speed meter 31 performed by the electronic control device 2 will be described with reference to FIG.

  First, when the ignition switch of the vehicle is turned on, the vehicle speed display device 1 initializes each internal device, and the display process of the display unit 3 starts.

  In the electronic control device 2 in the vehicle speed display device 1, the auto-cruise control device and the target speed based on the information received from the auto-cruise control device that is one of the plurality of in-vehicle device control devices 6 and the target speed input unit 7. It is determined whether or not any target speed of the input unit 7 is set (step S1). If the auto cruise control device is in automatic travel control, the target speed setting of the auto cruise control device that is closely related to the vehicle operation is used in preference to the target speed setting of the target speed input unit 7 (that is, auto If the cruise control device is under automatic traveling control, the target speed setting of the target speed input unit 7 is canceled).

  If step S1 is YES (target speed is being set), the process proceeds to step S2, and if NO, the process proceeds to step S6.

  When the process proceeds to step S2, the electronic control unit 2 requests the display unit 3 to display the current vehicle speed received from the in-vehicle device control unit 6 and the set target speed on the speedometer 31, and the display unit 3 requests the request. Accordingly, the current vehicle speed and the target speed are displayed on the speed meter 31 (see FIG. 3 described later).

  Next, the electronic control unit 2 determines whether or not the target speed exceeds the speed limit acquired from the speed limit acquisition unit 5 (step S3).

  If the target speed> the speed limit (YES), the process proceeds to step 4; if the target speed ≦ the speed limit (NO), the process proceeds to return and returns to the determination in step S1.

  When the process proceeds to step S4, the electronic control unit 2 requests the display unit 3 to display that the target speed exceeds the speed limit. Specifically, the range (specific area) of the difference between the target speed and the speed limit is displayed on the speed scale of the speedometer together with the current vehicle speed (see FIG. 4 described later).

  In this way, since the range of the difference between the target speed and the speed limit is displayed on one speedometer at the same time as the vehicle speed and the vehicle speed, the user does not need to move his eyes to another device and the target speed is exceeded instantaneously. Can be visually confirmed.

  In addition, by displaying the range of the difference between the target speed and the speed limit rather than displaying both the target speed and the speed limit with numbers, letters, and arrow lines, you can know that the user has exceeded the speed limit and how much it exceeds You can see how you are doing at the same time, making it easier to recognize your attention intuitively and immediately.

  When the processing proceeds to step S4, the electronic control unit 2 requests the warning unit 4 to emit a warning sound, and the warning unit 4 repeats a predetermined sound (for example, a single beep repeatedly) or voice (" The speed limit has been exceeded "). In this way, not only the display but also a single sound or voice is used to warn the user that the speed limit has been exceeded, so that the user can more clearly recognize the caution about exceeding the speed limit.

  The display in step S4 is not limited to this, and any method that can notify information that the target speed has exceeded the speed limit may be used. For example, as in step S2, the electronic control unit 2 displays the current vehicle speed and the set target speed on the speedometer 31 using numbers, letters, and arrow lines, and indicates that the warning unit 4 has exceeded the speed limit. A sound or voice that warns the user may be generated. In addition, the current vehicle speed may be displayed on the speed meter 31 and the warning unit 4 may be warned to the user by sounding only the sound or voice that the target speed exceeds the speed limit. By receiving the notification as described above, the user can recognize the attention to exceeding the target speed according to his / her own visual or auditory discrimination ability.

  By performing step S4 as described above, the user can be notified of necessary information (information that the target speed exceeds the speed limit) when the user needs to pay attention to the speed limit.

  Further, when the electronic control unit 2 proceeds to step S4, the electronic control unit 2 starts counting the timer, and determines whether or not a predetermined time has elapsed from the start of counting in step S5. If the predetermined time has elapsed (YES), the process proceeds to return and returns to the determination in step S1. If the predetermined time has not elapsed (NO), steps S4 and S5 are repeatedly executed until the predetermined time elapses. There is no particular value for the predetermined time, but it is sufficient that the user notices the notification in step S4. Here, 5 seconds is set as the predetermined time.

  Next, if NO in step S1 for confirming whether the target speed is being set, the process proceeds to step S6. In step S6, as a normal driving mode driven by the user, the electronic control unit 2 requests the display unit 3 to display information indicating the current vehicle speed, and the display unit 3 displays the information on the speedometer 31 according to the request. Displays the current vehicle speed (see FIG. 5 described later).

  Then, the electronic control unit 2 determines whether or not the current vehicle speed exceeds the speed limit (step S7). If the current vehicle speed> the speed limit (YES), the process proceeds to step 8. If the current vehicle speed ≦ the speed limit (NO), the process proceeds to return and returns to the determination in step S1.

  Note that the speed limit here is a value obtained by first setting the legal speed value of the traveling road and setting a speed limit 5 km / h lower than the legal speed. In this way, the user can be careful not to drive the vehicle beyond the legal speed, and the target speed can be set to the legal speed by setting a value slightly lower than the legal speed as the speed limit value. It is possible to allow time for the next action (stepping on the brake, changing the target speed, etc.) that the user takes next before exceeding.

  In step S8, the display unit 3 is requested to display the current vehicle speed and the speed limit on the speed meter 31, and the display unit 3 displays the current vehicle speed and the speed limit on the speed meter 31 according to the request (described later). (See FIG. 6).

  After the display, the process returns to step S7, and the processes of step S7 and step S8 are repeated until the current vehicle speed ≦ the speed limit. Since the speed meter 31 has only one type of speed limit as speed information other than the vehicle speed, there is little information to be displayed and the appearance is neat. Therefore, steps S7 and S8 are repeated until a predetermined condition (vehicle speed ≦ limit speed) is reached, and both the vehicle speed and the limit speed are continuously displayed in the speedometer 31. Therefore, the user can know whether or not the vehicle speed has exceeded the speed limit instantly without changing the line of sight. Here, the user is warned by display that the vehicle speed exceeds the speed limit. However, the present invention is not limited to this, and the user may be warned by generating sound or voice instead of the display, for example.

  Having described the processing related to the velocity meter 31 of the present embodiment, a display method related to the velocity information of the speed limit and the target speed as described above, or chosen to see what pattern in advance according to the conditions of running Is recorded in the ROM program.

  Next, display examples of the speed meter 31 of the present embodiment will be described with reference to FIGS. The speed meter 31 is displayed on a color liquid crystal display capable of gradation display. In order to make the following explanation easy to understand, the speed limit is assumed to be the legal speed of the vehicle and equal.

  FIG. 3 is a display example of the speed meter 31 corresponding to step S2 of FIG. The speed meter 31 includes a dial 311 indicating a vehicle speed scale for indicating the vehicle speed and a vehicle speed corresponding to the scale (hereinafter, the vehicle speed scale and the dial are collectively referred to as a scale) 311, and the scale 311. A pointer 312 is displayed that rotates in an analog manner (circular movement in both forward and reverse directions) and displays the current vehicle speed. The speed meter 31 displays a target speed 313 on the outer periphery of the scale 311. Here, the current vehicle speed is 30 km / h, the target speed is 50 km / h, and the speed limit is 60 km / h. Since the target speed does not exceed the speed limit under the condition of target speed ≦ limit speed, the speed limit that the user does not need to pay attention to is not displayed because it looks clean. Further, since there is no need for the user to pay attention, there is no need to notify the speed limit by sound or voice. Therefore, the speed meter 31 displays a target speed 313 in addition to the current vehicle speed 312. Thus, since the user does not need to see an unnecessary display with the speed meter 31, it can suppress feeling annoyance in unnecessary speed information.

  FIG. 4 is a display example of the speed meter 31 corresponding to step S4 of FIG. In addition to the scale 311, the current vehicle speed 312, and the target speed 313, the speed meter 31 displays speed information 314 indicating the range of the difference between the target speed and the speed limit. The range of this difference is displayed on the speed scale in a color (here, green) different from the background color (here, black) of the speed meter 31 and the vehicle speed 312 (here, white). The color to be colored in the difference range is not particularly limited as long as the difference between the difference range color and the adjacent color (surrounding color) can be recognized. The current vehicle speed is 30 km / h, the target speed is 50 km / h, and the speed limit is 40 km / h. Unlike FIG. 3, when the target speed (50 km / h)> restricted speed (40 km / h) is reached when the vehicle reaches the turning point of legal speed (60 km / h → 40 km / h) while the vehicle is traveling, As shown in FIG. 4, in addition to the current vehicle speed 312, speed information 314 (difference of 10 km / h) is displayed.

  Thus, rather than displaying both the target speed and the speed limit with numbers, letters, and arrow lines, the range (specific area) of the difference between the target speed and the speed limit is displayed in color. By displaying in this way, it is possible to know that the user has exceeded the speed limit and to see how much the speed has been exceeded at the same time, and the user can recognize attention more intuitively and immediately. Further, by coloring the difference range, the user can clearly identify the type of warning by looking at the color.

  FIG. 5 shows a display example of the speed meter 31 corresponding to step S6 of FIG. The speed meter 31 displays a scale 311 and the current vehicle speed 312. Here, the current vehicle speed is 30 km / h, and the speed limit is 60 km / h. Since it is not necessary to call attention especially between the current vehicle speed ≦ the speed limit, it is possible to omit the display of the speed limit as shown in FIG. 5, and there is no need to warn by sound or voice. Therefore, the speed meter 31 can make the display cleaner and can prevent the user from feeling annoyed by looking at the extra display.

  FIG. 6 shows a display example of the speed meter 31 corresponding to step S8 of FIG. In addition to the scale 311 and the current vehicle speed 312, the speed meter 31 displays speed information 315 indicating the range of the difference between the vehicle speed and the speed limit. The range of this difference is displayed on the speed scale in a color (here, red) different from the background color (here, black) of the speedometer 31 and the vehicle speed 312 (here, white). The current vehicle speed is 80 km / h, and the speed limit is 60 km / h. When the current vehicle speed> the speed limit, in addition to the current vehicle speed 312, speed information 315 indicating the range of the difference between the vehicle speed and the speed limit is displayed. In this way, how much the current vehicle speed exceeds the speed limit is colored and displayed in the range of the difference between the vehicle speed and the speed limit rather than being displayed with numbers, letters, or arrow lines, so that the user can set the speed limit. It is possible to know that it has been exceeded and to see how much it has been exceeded at the same time, making it easier to recognize attention more intuitively and immediately. In addition, by changing the color of the difference range, such as speed information 314 (green) and speed information 315 (red), the user can clearly determine the type of warning that the user is receiving from the color. Can be identified.

  As described above, the embodiment of the vehicle speed display device of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and the invention according to each claim of the claims. For example, the optimum speed of eco-driving may be used instead of the speed limit as speed information for limiting the target speed.

  In addition, when performing automatic traveling control so that the vehicle travels at a constant speed, the target speed is set by the user as described above. On the other hand, when the vehicle automatically controls to follow the preceding vehicle, the distance between the vehicles ahead of the vehicle is kept constant by using a millimeter wave sensor, FM (continuous wave) -CW (frequency modulation) radar, or the like. The vehicle speed adjusted in this way is the target speed. In this case, the target speed is frequently changed every time the inter-vehicle distance with the front of the vehicle changes, and there is a possibility that the user may feel troublesome to see the speed meter. Therefore, in the case of performing automatic traveling control so that the vehicle follows the preceding vehicle, it is assumed that the vehicle speed is equal to the target speed, and the target speed is omitted in step 2 of FIG. 2 (the meaning of the target speed is included in the vehicle speed). Only the vehicle speed may be displayed.

DESCRIPTION OF SYMBOLS 1 Vehicle speed display apparatus 2 Electronic control apparatus 3 Display part 4 Warning part 5 Speed limit acquisition part 6 In-vehicle apparatus control apparatus 7 Target speed input part 31 Speed meter 32 Rotation meter 33 Fuel gauge 34 Water temperature gauge 311 Scale 312 Current vehicle speed 313 Target speed 314 Speed at which target speed exceeds speed limit 315 Speed at which vehicle speed exceeds speed limit

Claims (5)

Vehicle speed acquisition means for acquiring the vehicle speed of the vehicle;
Target speed acquisition means for acquiring the target speed;
Speed limit acquisition means for acquiring a speed limit;
Display means capable of appropriately displaying the acquired vehicle speed, the target speed, and the speed limit;
A vehicle speed display device comprising:
Determination means for determining whether or not the target speed exceeds the speed limit;
When the determination means determines that the target speed does not exceed the speed limit,
Along with the vehicle speed, the target speed is displayed on the display means,
When the determination means determines that the target speed exceeds the speed limit,
Control means for displaying the vehicle speed on the display means, and for notifying information that a vehicle occupant can recognize that the target speed exceeds the speed limit;
A vehicle speed display device comprising:   The vehicle speed display device according to claim 1, wherein the speed limit is set to a value lower by a predetermined value than the acquired speed limit.   The vehicle speed display device according to claim 1 or 2, wherein the notification is made using at least one of display, sound, and voice.   4. The vehicle speed display device according to claim 1, wherein the control unit simultaneously displays the vehicle speed and the information that can be recognized by a vehicle occupant on the display unit. 5.   The said control means displays the range of the difference of the said target speed and the said speed limit on the said display means by the color different from the circumference | surroundings of the range, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Vehicle speed display device.

Images