JP2010143407A - Display device, display method, and display program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device, a display method and a display program for enabling a driver to easily recognize a specified speed. <P>SOLUTION: The display device includes a monitor 51 for displaying a gauge 512 showing the current speed of a vehicle in coordination with a scale 511b showing a plurality of speeds, a recognized speed specifying part 52a for specifying a recognized speed which the driver should recognize during the travel of the vehicle, and a display control part 52b for controlling the monitor 51 so that the scale 511b is displayed on a reference position P corresponding to the recognized speed specified by the recognized speed specifying part 52a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device, a display method, and a display program.

  Conventionally, as a display device that displays the current speed of a vehicle on a speedometer, a display device that enlarges and displays a part of the speedometer has been proposed. For example, in Patent Document 1, the range of 40 to 70 km / h is enlarged and displayed in the case of a general road, the range of 90 to 120 km / h is enlarged and displayed in the case of a highway, or the current vehicle speed of the vehicle. Has been disclosed (see paragraphs 0030, 0031, and 0038 of Patent Document 1).

JP 2004-237844 A

  However, in the display device described in Patent Document 1, the range displayed in an enlarged manner moves according to the type of road on which the vehicle travels and the current vehicle speed of the vehicle. The driver also needs to move the line of sight, and it is difficult for the driver to recognize a specific speed that the driver should recognize. In addition, in this display device, since only a part of the speed range is displayed in an enlarged manner, the display part of the other speed range may be hidden by this enlarged display part, resulting in a speed range that the driver cannot recognize. There was a risk of it.

  The present invention has been made to solve the above-described problems, and provides a display device, a display method, and a display program that allow a driver to easily recognize a specific speed. With the goal.

  In order to solve the above-described problems and achieve the object, the display device according to claim 1 displays current speed information indicating a current speed of the vehicle in association with a scale indicating a plurality of speeds; Recognition speed specifying means for specifying a recognition speed to be recognized by the driver when the vehicle is traveling, and the scale corresponding to the recognition speed specified by the recognition speed specifying means are set within a display range of the display means. Display control means for controlling the display means so as to be displayed at the reference position.

  The display device according to claim 2 is the display device according to claim 1, wherein the display control unit is configured to determine the current speed information or the current speed based on a difference between the recognized speed and the current speed of the vehicle. The display mode of the display means on at least one of the scales indicating a plurality of speeds is controlled.

  Further, in the display device according to claim 3, in the display device according to claim 1 or 2, the display control unit controls an interval between the scales indicating the plurality of speeds based on the recognition speed. It is characterized by that.

  According to a fourth aspect of the present invention, in the display device according to the third aspect, a plurality of speed regions included in a speed range indicated by the plurality of speeds displayed on the display unit are based on the recognition speed. It is set, and the mutual intervals of the scales indicating the plurality of speeds are controlled so that the mutual intervals of the scales indicating the plurality of speeds in the set plurality of speed regions are different. It is characterized by.

  Further, the display device according to claim 5 is the display device according to any one of claims 1 to 4, wherein the recognition speed specifying means acquires a speed limit corresponding to a current position of the vehicle, The recognition speed is specified based on the speed limit.

  The display method according to claim 6 is a display step of displaying current speed information indicating a current speed of the vehicle on a display means in association with a scale indicating a plurality of speeds, and the driver recognizes when the vehicle is traveling. A recognition speed specifying step for specifying the recognition speed to be performed, and the scale corresponding to the recognition speed specified in the recognition speed specifying step is displayed at a reference position set within a display range of the display means. And a display control step for controlling the display means.

  A display program according to claim 7 causes a computer to execute the method according to claim 6.

  According to the display device according to claim 1, the display method according to claim 6, and the display program according to claim 7, the recognition speed can be displayed at a position where the driver can easily enter the field of view. Since it is unnecessary for the driver to move his / her line of sight in order to see the speed, the driver can easily recognize the recognition speed. In addition, since only a part of the speed range is not enlarged and displayed, it is possible to prevent the recognition speed from being hidden.

  Further, according to the display device of the second aspect, for example, when the current speed of the vehicle exceeds the recognition speed, only the display of the part corresponding to the current speed exceeding the other is displayed. By displaying in a display mode such as a color, shape, or blinking interval different from the portion, the driver can easily know the magnitude of the current speed of the vehicle with respect to the recognized speed.

  Further, according to the display device of the third aspect, for example, by controlling the mutual interval of the scales so that the recognition speed can be easily recognized, it becomes easier for the driver to determine the current speed of the vehicle with respect to the recognition speed. Can be grasped.

  Further, according to the display device of the fourth aspect, for example, in the speed region near the recognition speed, the current speed of the vehicle with respect to the recognition speed is driven, for example, the interval between the scales is increased more than the other speed regions. It is possible to make it easier for a person to grasp.

  According to the display device of the fifth aspect, since the recognition speed is specified based on the speed limit corresponding to the current position of the vehicle, the recognition speed is moved based on the speed limit of the road on which the vehicle is traveling. The recognition speed according to the current position of the vehicle can be more easily grasped by the driver.

  Hereinafter, embodiments of a display device, a display method, and a display program according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to each embodiment.

[Embodiment 1]
First, the first embodiment will be described. In this form, a scale corresponding to the recognition speed is displayed at a reference position set within the display range of the display means. In the first embodiment, a mode in which the display mode of the current speed information display unit is controlled based on the difference between the recognized speed and the current speed of the vehicle when the recognized speed is 60 km / h or higher will be described. On the other hand, in Embodiment 2 to be described later, an embodiment will be described in which the mutual interval of the scales indicating a plurality of speeds is controlled based on the recognition speed when the recognition speed is less than 60 km / h. As described above, when the recognition speed is 60 km / h or more, the display mode is controlled based on the difference between the recognition speed and the current speed of the vehicle. In many cases, the vehicle is trying to run at a high speed, but the current speed of the vehicle gradually increases and exceeds the recognition speed without the driver's knowledge. This is because there is a greater need for the driver to easily grasp the size. However, the specific numerical value of the recognition speed to which the first embodiment is applied can be arbitrarily changed.

(Constitution)
FIG. 1 is a block diagram illustrating a display system according to the first embodiment. The display system 1 includes a current position detection processing unit 10, a vehicle speed sensor 20, a map database 30 (hereinafter referred to as “DB”), a camera 40, and a display device 50.

(Configuration-Current location detection processing unit)
The current position detection processing unit 10 is a current position detection unit that detects the current position of the vehicle to which the display device 50 is attached and outputs current position information regarding the detected current position of the vehicle to the display device 50. Specifically, the current location detection processing unit 10 includes at least one of a GPS, a geomagnetic sensor, a distance sensor, a steering sensor, and a gyro sensor (all of which are not shown), and the current position and current direction of the vehicle. The position information is detected by a known method.

(Configuration-vehicle speed sensor)
The vehicle speed sensor 20 is a measuring unit that calculates the current speed of the vehicle based on the rotational speed of the wheels and the like and outputs current speed information related to the calculated current speed of the vehicle to the display device 50. The vehicle speed sensor 20 is configured using a known vehicle speed sensor.

(Configuration-Map DB)
The map DB 30 is a map information storage unit that stores map information and speed limit information, and is arranged, for example, inside a car navigation system. “Map information” is information necessary for specifying a position regarding a road, and includes, for example, road coordinate information, lane number information, road number information, and the like. The “speed limit information” is information necessary for specifying the speed limit, and is stored in the map DB 30 in association with the map information. The speed limit is the designated speed (regulated speed) specified by a sign or sign (the maximum speed or the minimum speed if the minimum speed is set) and the legal speed determined for each type of vehicle. Including.

(Configuration-Camera)
The camera 40 is a photographing means for photographing the traveling state of the vehicle, and is disposed at the front and rear ends of the vehicle, for example. The camera 40 captures the surroundings of the vehicle, performs image processing on an image acquired by the capturing, acquires travel state information, and outputs the travel state information to the display device 50. “Driving status information” is information necessary to specify the recognition speed based on the driving status of the vehicle. For example, weather conditions such as clear weather, rainy weather, and fog around the vehicle, and drying on the road surface of the vehicle. -Information to specify road surface conditions such as freezing or daytime / nighttime time zone conditions. The “recognized speed” is a speed that the driver should recognize when the vehicle travels. For example, the speed is calculated by correcting the speed limit based on the traveling state of the vehicle. Details of this calculation method will be described later. . The speed limit information for specifying the speed limit is described above as being stored in the map DB 30. However, the speed limit information is obtained by imaging a road sign or the like with the camera 40 and performing image processing on the image acquired by the imaging. You may specify. The camera 40 is configured using a known imaging device such as a CCD sensor or a CMOS sensor, and a known optical system component such as a fisheye lens or a prism.

(Configuration-Display device)
The configuration of the display device 50 will be described. The display device 50 includes a monitor 51, a control unit 52, and a data recording unit 53.

  The monitor 51 is display means for displaying the current speed information indicating the current speed of the vehicle acquired from the vehicle speed sensor 20 in association with the scale 511b indicating a plurality of speeds. For example, the monitor 51 is configured using a liquid crystal display. A display example of the scale 511b and the like by the monitor 51 is shown in FIG. As shown in FIG. 2, the monitor 51 displays an index 511 and a gauge 512 as speedometers.

The index 511 includes an index line 511a and a scale 511b. The index line 511a is a reference line for displaying the scale 511b, and is formed in an arc shape in the example of FIG. The scale 511b indicates each speed assigned to the index line 511a, and is composed of a scale line 511b ₁ for displaying the assigned position of each speed, and display characters 511b ₂ indicating these speeds numerically. ing. In the example of FIG. 2, the scale line 511b ₁ is displayed so as to be orthogonal to the index line 511a on the inner side or the outer side on the index line 511a. The display character 511b ₂ is displayed near the end portion of the scale line 511b ₁ . In the following description, among the plurality of speeds indicated by the index 511, the lowest speed (0 km in FIG. 2) is referred to as the lowest display speed, and the highest speed (160 km in FIG. 2) is referred to as the highest display speed. (In the first embodiment, an example in which the minimum display speed and the maximum display speed and the display positions of the minimum display speed and the maximum display speed are constant and not changed will be described).

  Here, a reference position P is set within the display range of the monitor 51. The reference position P is a position for displaying the scale 511b corresponding to the recognition speed. The reference position P can be set at an arbitrary position within the display range of the monitor 51. For example, the reference position P can be set at a position away from the index line 511a, but the recognition speed easily enters the driver's field of view. It is preferable to set such a position. Therefore, in the first embodiment, the reference position P is set near the top of the arc-shaped index line 511a (in the example of FIG. 2, the scale 511b corresponding to the recognition speed = 60 km is the index line 511a. It shows the case where it is displayed near the top).

The gauge 512 indicates current speed information. In the example of FIG. 2, the gauge 512 is displayed inside the index line 511a, and is configured as an arc-shaped band-like region along the index line 511a. . The gauge 512 starts at a position corresponding to the speed = 0 in the index 511 and ends at a position corresponding to the current speed in the index 511. Therefore, by reading the display character 511b ₂ of the scale 511b corresponding to the position of the end of the gauge 512, it is possible to grasp the current speed. Further, the relative relationship between the current speed and the recognition speed can be easily grasped by the relative relationship between the position of the end of the gauge 512 and the scale 511b displayed at the reference position P.

  In FIG. 1, a control unit 52 is a control unit that controls the display device 50. Specifically, the CPU, various programs that are interpreted and executed on the CPU (basic control programs such as an OS, and startup on the OS) And an internal memory such as a RAM for storing programs and various types of data. In particular, the display program according to the first embodiment is installed in the display device 50 via an arbitrary recording medium or network, so that the control unit 52 necessary for executing the display method according to the first embodiment is installed. Each part is substantially constituted.

  The control unit 52 includes a recognition speed specifying unit 52a and a display control unit 52b in terms of functional concept. The recognition speed specifying unit 52a recognizes the recognition speed from the map information and speed limit information acquired from the map DB 30 based on the current position information acquired from the current position detection processing unit 10 and the traveling state information acquired from the camera 40. It is a speed specifying means. The display control unit 52b controls the monitor 51 so that the scale 511b corresponding to the recognition speed specified by the recognition speed specifying unit 52a is displayed at the reference position P set within the display range of the monitor 51. Means. Details of processing executed by each component of the control unit 52 will be described later.

  The data recording unit 53 is a recording unit that records a program and various data necessary for the operation of the display device 50, and is configured using, for example, a hard disk as an external storage device. However, any other recording medium including a magnetic recording medium such as a magnetic disk or an optical recording medium such as a DVD or a Blu-ray disk can be used instead of or together with the hard disk.

  In the data recording unit 53, a display information table 53a is recorded. The display information table 53a is referred to when the display control unit 52b executes the display control of the monitor 51, and is used to determine the display mode of the index 511 and the gauge 512 on the monitor 51. FIG. 3 is a diagram illustrating a configuration example of information stored in the display information table 53a. For example, the display information table 53a includes an item “speed region” and an item “monitor display information” as table items, and the item “monitor display information” includes an item “gauge color”, an item “gauge width”, It is roughly divided into item “blinking of gauge” and item “scale interval”, and information corresponding to these items is stored in association with each other.

  The information stored corresponding to the item “speed area” includes information indicating a plurality of speed areas included in the speed range indicated by the plurality of speeds displayed on the monitor 51 (“first area”, “first” in FIG. 3). 2 area "," third area ") and information indicating the speed range included in each of the plurality of speed areas (" less than recognition speed "in FIG. 3," more than recognition speed to less than recognition speed +20 km / h "), “Recognition speed + 20 km / h or more”) can be stored in association with each other. The information stored corresponding to the item “gauge color” is information indicating the color of the gauge 512, and for example, information regarding the color of the gauge 512 corresponding to the speed region of the current speed of the vehicle can be stored. ("Blue", "Yellow", "Red" in FIG. 3). The information stored corresponding to the item “gauge width” is information indicating the width of the gauge 512. For example, information relating to the width of the gauge 512 corresponding to the speed region of the current speed of the vehicle (for example, a predetermined value) (Magnification with respect to the reference width) can be stored ("1.0 times", "1.5 times", "2.0 times" in FIG. 3). The information stored corresponding to the item “gauge blinking” is information indicating the blinking of the gauge 512. For example, information regarding the blinking interval of the gauge 512 corresponding to the speed region of the current speed of the vehicle can be stored. (In FIG. 3, “does not flash”, “flashes every 3 seconds”, “flashes every second”). The information stored corresponding to the item “scale interval” is information indicating the mutual intervals of the scales indicating a plurality of speeds for each of a plurality of speed regions (in FIG. 3, “standard interval”, “wide interval”, “ Narrow spacing "). In this example, the “wide interval” is an interval wider than the standard interval, for example, about 1.2 times the standard interval. The “narrow interval” is an interval narrower than the standard interval. For example, the remaining speed range obtained by subtracting the speed display ranges of the first area and the second area from the entire speed range displayed on the index 511 is as follows: This is an interval determined by dividing at equal intervals according to the speed corresponding to the speed area which is the third area.

(processing)
Next, display processing executed by the display system 1 configured as described above will be described. FIG. 4 is a flowchart of the display process (in the following description of each process, step is abbreviated as “S”). FIG. 5 is a schematic diagram showing a display mode of the monitor 51 on a general road, where (a) is a display mode in which the current speed of the vehicle is less than 60 km / h, and (b) is a current speed of the vehicle of 60 km / h. From the above, the display mode of less than 80 km / h, (c) is a diagram showing the display mode of the current vehicle speed of 80 km / h or more. FIG. 6 is a schematic diagram showing a display mode of the monitor 51 on the highway, where (a) is a display mode in which the current speed of the vehicle is less than 80 km / h, and (b) is a current speed of the vehicle of 80 km / h. From the above, the display mode of less than 100 km / h, (c) is a diagram showing the display mode of the vehicle current speed of 100 km / h or more.

  This display process is automatically started after the display device 50 is powered on. After the display device 50 is powered on, the control unit 52 acquires current position information via the current position detection processing unit 10 (SA1). Next, the control unit 52 acquires map information corresponding to the current position of the vehicle by referring to the map DB 30 based on the current position information acquired in SA1, and sets speed limit information corresponding to the map information. Obtain (SA2). Moreover, the control part 52 acquires driving | running | working condition information via the camera 40 (SA3).

  And the recognition speed specific | specification part 52a specifies recognition speed based on the speed limit information acquired by SA2, and the driving | running | working condition information acquired by SA3 (SA4). For example, from the speed limit specified by the speed limit information, the control unit 52 determines a predetermined speed according to the driving condition specified by the driving condition information (for example, 10 km / h in the case of rain or fog, The speed calculated by subtracting 10 km / h when the road surface is frozen and 5 km / h when the road surface is night is specified as the recognition speed. For this reason, when the speed limit is 60 km / h, and in the case of rain and night, the recognition speed is 60-10-5 = 45 km / h. However, in the following description, for simplification of explanation, the case where there is no subtraction of the speed according to the driving situation will be described, the speed limit = recognition speed = 60 km / h for a general road, and the speed limit for a highway. Explanation will be made assuming that the recognition speed is 80 km / h.

Next, the display control unit 52b controls the monitor 51 so that the scale 511b corresponding to the recognition speed specified in SA4 is displayed at the reference position P (SA5). For example, the display control unit 52b assigns the minimum display speed to one end of the arc-shaped index line 511a, the maximum display speed to the other end of the index line 511a, and the recognition speed to the reference position P set at the top position of the index line 511a. Hit. In particular, the recognition rate to be displayed on the reference position P, it is preferable to be displayed in an emphasized than the speed by other display character 511b _2, in the example of FIGS. 5 and 6, the recognition rate, larger displays than other speeds In addition, it is surrounded by a border. Further, the display control unit 52b refers to the display information table 53a shown in FIG. 3 to obtain scale intervals corresponding to each of the first region to the third region, and based on the obtained scale intervals, The display mode of the scale 511b in each of the first to third areas is specified, and the display mode of the monitor 51 is controlled so that the scale 511b is displayed according to the specified display mode. Specifically, in the example of FIG. 5A, the scale 511b is displayed at a standard interval for the first area from the minimum display speed = 0 km to the recognition speed = less than 60 km, and the recognition speed = 60 km to 80 km (= The scale 511b is displayed at a wide interval for the second area up to less than (recognition speed +20 km), and the scale 511b is displayed at a narrow interval for the third area of 80 km (= recognition speed +20 km) or more. On the other hand, in the example of FIG. 6A, the scale 511b is displayed at a standard interval for the first area from the minimum display speed = 0 km to the recognition speed = less than 80 km, and the recognition speed = 80 km to 100 km (= recognition speed + 20 km). The scale 511b is displayed at a wide interval for the second area up to less than), and the scale 511b is displayed at a narrow interval for the third area of 100 km (= recognition speed + 20 km) or more.

  Returning to FIG. 4, the control unit 52 then obtains current speed information via the vehicle speed sensor 20 (SA6). Then, the display control unit 52b determines whether or not the current speed specified by the current speed information is less than the recognition speed specified by SA4, and based on the determination result, the display information table 53a shown in FIG. , The display mode of the current speed (gauge 512) is specified, and the display mode on the monitor 51 is controlled so that the current speed is displayed in the determined display mode (SA7).

  For example, when the current speed is included in the first area (when the current speed is less than the recognition speed), the display control unit 52b displays the first speed in the first area as shown in FIGS. 5 (a) and 6 (a). The display mode of the current speed gauge 512 is assumed to be color = blue, width = 1.0 times, and blinking = no blinking. Further, when the current speed is included in the second area (when the current speed is equal to or higher than the recognition speed and lower than the recognition speed +20 km / h), the display control unit 52b is configured as shown in FIGS. 5B and 6B. While maintaining the display mode of the current speed gauge 512 in the first region in the above-described display mode, the display mode of the current speed gauge 512 in the second region is changed to color = yellow, width = 1.5 times, blinking = 3 Blinks every second. Alternatively, when the current speed is included in the third area (when the recognition speed is greater than or equal to 20 km / h), the display control unit 52b can display the first area and the first area as illustrated in FIGS. 5 (c) and 6 (c). While maintaining the display mode of the current speed gauge 512 in the second region in the above-described display mode, the display mode of the current speed gauge 512 in the third region is changed to color = red, width = 2.0 times, blinking = 1. Blinks every second.

  Thereafter, returning to SA1 in FIG. 4 and repeating SA1 to SA7, the scale 511b corresponding to the new recognition speed is displayed at the reference position P every time the recognition speed changes according to the current position and the driving situation. Further, the monitor 51 is controlled so that each time the current speed changes, the monitor 51 is displayed so that the gauge 512 is displayed in a display mode corresponding to the relationship between the new current speed and the recognized speed.

(effect)
Thus, according to the first embodiment, the scale 511b corresponding to the recognition speed that the driver should recognize when the vehicle is traveling is displayed at the reference position P set within the display range of the monitor 51. Since the display control unit 52b controls the monitor 51, the recognition speed can be displayed at a position that is easy to enter the driver's field of view, and the driver does not need to move the line of sight to see the recognition speed. Can easily recognize the recognition speed. In addition, since only a part of the speed range is not enlarged and displayed, it is possible to prevent the recognition speed from being hidden.

  Further, the display control unit 52b controls the monitor 51 so as to change the display mode of at least one of the gauge 512 and the scale 511b based on the difference between the recognition speed and the current speed. If the current speed exceeds the current speed, only the part corresponding to the current speed that has been exceeded is displayed in a different color, shape, or blinking interval from the other parts. The driver can easily grasp the current speed of the vehicle relative to the speed.

  Further, a plurality of speed regions included in a plurality of speed ranges displayed on the monitor 51 are set based on the recognition speed, and the display is performed so that the mutual intervals of the scales 511b in the set plurality of speed regions are different. Since the controller 52b controls the mutual interval of the scales 511b, for example, in the speed region close to the recognition speed, the size of the current speed of the vehicle with respect to the recognition speed is increased, for example, the mutual interval of the scales is increased compared to other speed regions. It is possible to make it easier for a person to grasp.

  Further, since the recognition speed specifying unit 52a acquires the speed limit corresponding to the current position of the vehicle and specifies the recognition speed based on the speed limit, the recognition speed is determined based on the speed limit of the road on which the vehicle is traveling. Can be changed dynamically, and the driver can easily recognize the recognition speed according to the current position of the vehicle.

[Embodiment 2]
Next, a second embodiment will be described. As described above, this form is a form for controlling the mutual intervals of the scales indicating a plurality of speeds based on the recognition speed when the recognition speed is less than 60 km / h. The configuration of the second embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified. The configuration substantially the same as the configuration of the first embodiment is the same as that used in this embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Constitution)
The display system 1 according to the second embodiment can be configured similarly to the configuration of the display device 50 according to the first embodiment shown in FIG. 1 except that the control content described later of the control unit 52 is different. Description of other components is omitted.

(processing)
Next, processing executed by the control unit 52 of the display system 1 according to Embodiment 2 will be described. 7 and 8 are schematic diagrams showing display modes of the monitor 51 according to the second embodiment. FIG. 7 is a diagram showing display modes when the recognition speed is 30 km / h, and FIG. 8 is recognition speed = 50 km / h. It is a figure which shows the display mode in the case of. This display process is performed in substantially the same manner as the display process of FIG. 4, but the process in SA5 is different.

  That is, in SA5, in addition to controlling the monitor 51 so that the scale 511b corresponding to the recognition speed specified in SA4 is displayed at the reference position P, the display control unit 52b performs a plurality of operations based on the recognition speed. Controls the distance between the scales indicating the speed. For example, the display control unit 52b determines a speed that is twice the recognition speed specified in SA4 as the maximum display speed of the index 511, and determines between the predetermined maximum display speed from the predetermined minimum display speed (= 0 km / h). The mutual intervals of the scales 511b are displayed at equal intervals. In the example of FIG. 7, the scale 511b corresponding to the recognition speed = 30 km / h is displayed at the reference position P, and the minimum display speed = 0 km / h to the maximum display speed = 60 km / h (= 30 km / h × 2). Are displayed at equal intervals. In the example of FIG. 8, the scale 511b corresponding to the recognition speed = 50 km / h is displayed at the reference position P, and the display minimum speed = 0 km / h to the display maximum speed = 100 km / h (= 50 km / h × 2). ) Are displayed at equal intervals.

(effect)
As described above, according to the second embodiment, the display control unit 52b controls the mutual interval between the scales 511b indicating the range of a plurality of speeds based on the recognition speed, so that the recognition speed can be easily recognized, for example. By controlling the mutual intervals of the scales, the driver can more easily grasp the magnitude of the current speed of the vehicle with respect to the recognized speed.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can do. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-mentioned contents, and may vary depending on the implementation environment and details of the configuration of the invention. May be solved, or only some of the effects described above may be achieved.

(About indicator and gauge display format)
The display forms of the indicator 511 and the gauge 512 can be arbitrarily changed. For example, the index line 511a of the index 511 may be a straight line instead of an arc. Gauge 512 may also be a straight line instead of an arc, or it may be a pointer whose rotation angle varies according to the current speed of the vehicle. When the gauge 512 is used as a pointer as described above, for example, the color of the pointer, the width of the pointer, or the blinking interval of the pointer may be changed according to the relationship between the current speed and the recognition speed. Further, the display mode of the recognition speed at the reference position can be changed, and the color, character width, or blinking interval may be changed with respect to the display mode of other speeds.

  Alternatively, when the index line 511a and the gauge 512 of the index 511 are formed in an arc shape, the index line 511a and the gauge 512 are rotated around the center of curvature like a gyrometer, thereby indicating the recognition speed. The monitor 51 may be controlled so that the scale 511b is displayed at the reference position P. FIG. 9 is a diagram showing a display mode of the monitor 51 according to such a modification. FIG. 9 shows a display example when the recognition speed is changed to 80 km / h after displaying the recognition speed = 60 km / h as shown in FIG. 5A, and the index line 511a is displayed. The index line 511a and the gauge 512 are rotated so that the scale 511b indicating the recognition speed = 80 km / h is displayed at the reference position P while maintaining the full length, the minimum display speed, and the maximum display speed.

  Alternatively, a plurality of recognition speeds may be set, and the monitor 51 may be controlled so that the scales 511b indicating the respective recognition speeds are displayed at different reference positions. FIG. 10 is a diagram showing a display mode of the monitor 51 according to such a modification. In FIG. 10, a scale 511b indicating recognition speed = maximum speed = 80 km / h is displayed at the reference position P1, and a scale 511b indicating recognition speed = minimum speed = 50 km / h is displayed at the reference position P2.

1 is a block diagram illustrating a display system according to Embodiment 1. FIG. It is a figure which shows the example of a display of the scale etc. by a monitor. It is a figure which shows the structural example of the information stored in the display information table. It is a flowchart of a display process. It is the schematic which shows the display mode of the monitor in a general road, (a) is a display mode in which the present speed of a vehicle is less than 60 km / h, (b) is the current speed of a vehicle from 60 km / h or more to 80 km / h. (C) is a diagram showing a display mode in which the current speed of the vehicle is 80 km / h or more. It is the schematic which shows the display mode of the monitor in a highway, (a) is a display mode in which the present speed of a vehicle is less than 80 km / h, (b) is the present speed of a vehicle from 80 km / h or more to 100 km / h. (C) is a diagram showing a display mode in which the current speed of the vehicle is 100 km / h or more. It is the schematic which shows the display mode of the monitor of Embodiment 2, and is a figure which shows the display mode in case of recognition speed = 30km / h. It is the schematic which shows the display mode of the monitor of Embodiment 2, and is a figure which shows the display mode in the case of recognition speed = 50km / h. It is the schematic which shows the display mode of the monitor of a modification. It is a figure which shows the display mode of the monitor which concerns on another modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display system 10 Present location detection process part 20 Vehicle speed sensor 30 Map DB
40 camera 50 display device 51 monitor 52 control unit 52a recognition speed specifying unit 52b display control unit 53 data recording unit 53a display information table 511 index 511a index line 511b scale 511b ₁ scale line 511b ₂ display characters 512 gauge P, P1, P2 reference position

Claims (7)

Display means for displaying current speed information indicating the current speed of the vehicle in association with scales indicating a plurality of speeds;
Recognition speed specifying means for specifying a recognition speed to be recognized by the driver when the vehicle is running;
Display control means for controlling the display means so that the scale corresponding to the recognition speed specified by the recognition speed specifying means is displayed at a reference position set within a display range of the display means;
A display device comprising: The display control means includes
Controlling a display mode in the display means of at least one of the current speed information or a scale indicating the plurality of speeds based on a difference between the recognized speed and the current speed of the vehicle;
The display device according to claim 1. The display control means includes
Controlling the mutual interval of the scales indicating the plurality of speeds based on the recognition speed;
The display device according to claim 1 or 2. The display control means includes
A plurality of speed areas included in a speed range indicated by the plurality of speeds displayed on the display means are set based on the recognition speed, and a scale indicating the plurality of speeds for each of the set speed areas is set. Controlling the mutual intervals of the graduations indicating the plurality of speeds so that the intervals are different;
The display device according to claim 3. The recognition speed specifying means includes
Obtaining a speed limit corresponding to the current position of the vehicle, and identifying the recognition speed based on the speed limit;
The display device according to claim 1, wherein: A display step of displaying current speed information indicating a current speed of the vehicle on a display means in association with a scale indicating a plurality of speeds;
A recognition speed specifying step for specifying a recognition speed to be recognized by the driver when the vehicle is running;
A display control step for controlling the display means so that the scale corresponding to the recognition speed specified in the recognition speed specifying step is displayed at a reference position set within a display range of the display means;
A display method comprising:   A display program for causing a computer to execute the method according to claim 6.

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