JP5472003B2 - Speed display device for vehicle - Google Patents

Description

  The present invention relates to a vehicle speed display device provided on a dashboard of a vehicle. In particular, the present invention relates to a vehicle speed display device that warns when a speed limit is exceeded.

  A general-purpose meter, which is a speedometer, displays the actual traveling speed, and the driver visually recognizes a road sign to determine whether the traveling speed is within the speed limit of the traveling path. In addition, there is no choice but to determine the difference between the actual traveling speed and the speed limit recognized by the driver.

  In recent years, the map information of navigation devices has started to include speed limit information, and the sign recognition technology using in-vehicle cameras has been developed to provide an environment in which means for obtaining speed limit information on a traveling road during vehicle travel can be obtained. It was. Patent documents 1-5 are known as a meter for vehicles using acquired speed limit information.

  In Patent Document 1, a plurality of LEDs (light emitting diodes) as backlight light sources for irradiating the liquid crystal part are arranged. And the arbitrary backlight color is obtained with the combination of the luminescent color of several LED. When the vehicle speed is low, the backlight color is green. When the vehicle speed is medium, the backlight color is yellow. Further, when the vehicle speed exceeds the legal speed limit, the backlight color is orange.

  In Patent Document 2, display information such as the brightness, color, blinking, and the like of the pointer is changed according to the state of the front vehicle following type automatic speed control device. One pointer for displaying the vehicle speed is formed by overlapping first and second pointer portions, and is formed of an optical fiber or the like. A lamp is disposed opposite to each of the introduction light portions to the first and second pointers.

  For example, in the preceding vehicle following mode, the mode change can be visually notified to the driver by changing the color such that the second pointer portion is red and the cruising mode at the set vehicle speed is the same blue.

  In addition, the illumination portion at the tip is provided with a pointer that moves like a pointer so that the set vehicle speed can be monitored. The motor rotates in accordance with the setting of the vehicle speed setting switch, the pointer also rotates, the tip of the pointer is illuminated, and the setting vehicle speed can be instructed to the dial.

  In addition, the curvature of the curve and the type of road are judged, and a vehicle speed warning is given based on display information such as the brightness, color, blinking, etc. of the pointer from the calculation of the speed according to this.

  A control speed (reference speed limit A) at which the vehicle can travel safely is calculated from the curvature of the road ahead. Next, the calculated reference speed limit A and the vehicle speed are compared in an alarm determination circuit to determine whether or not the vehicle speed is higher than the reference speed limit A. When the host vehicle speed is higher than the reference speed limit A, a pointer alarm is issued by an output from the display content control circuit.

  The reference speed limit can also be set by judging the type of road (highway, general road, urban area) in addition to the road curvature from the road information of the navigation device. When the host vehicle speed exceeds the reference speed limit, the driver can be alerted by improving visibility by blinking the lamp or changing display information such as color.

  Further, the pointer can be moved so as to indicate the reference speed limit as the reference speed limit is calculated. Accordingly, the driver can also visually recognize the reference speed limit, and when the reference speed limit is exceeded, the driver can quickly grasp the excessive speed and perform a deceleration action.

  The presence or absence of headlamp or wiper operation is determined, and the reference speed limit A is reviewed in accordance with this determination. The revised reference speed limit C is obtained from C = A-10. When the host vehicle speed exceeds the reference speed limit Ckm / h, display information such as the brightness, color, and blinking of the pointer can be changed.

  Patent Document 3 has a warning speed input unit in which a warning speed can be set by an operator, or a warning speed input unit that receives speed limit information from an external system and outputs it as a warning speed. The speed is displayed. When the warning speed is exceeded, the signal is turned on to control the chime operation.

  Patent Document 4 relates to an automatic cruise speed control device, and a liquid crystal image display (LCD) includes speed display means, first color development means, and second color development means.

  The driver inputs the speed limit V1 of the traveling road from the input means. The actual running speed Vs during the road running is measured by the vehicle speed sensor. V1-Vc is calculated by subtracting a preset speed width constant Vc from the speed limit V1.

  The actual running speed Vs during road running is displayed on the LCD, and the speed limit V1 is compared with the calculated V1-Vc. When the actual running speed Vs is compared with the speed limit V1 and is smaller than the speed limit V1, it is further compared with the speed limit V1 and V1-Vc, and when the actual speed Vs is smaller than V1-Vc, Only the green illumination emits light.

  When the actual running speed Vs is smaller than the speed limit V1 and the actual running speed Vs is larger than V1-Vc, the luminance ratio when the red illumination and the green illumination are mixed is set by the control unit and displayed. Two lights in the unit emit light and display as a third color. The color closer to red is closer to the speed limit.

  In Patent Document 5, a single-axis two-needle analog meter is used as a vehicle meter. The vehicle speed is displayed with the first pointer, and the speed limit is displayed with the second pointer. The navigation control circuit determines the speed limit at the vehicle position from the VICS information and the vehicle position information from the vehicle position detection unit.

  The image processing unit performs image processing on the vehicle front image captured by the camera, recognizes the road sign, determines the speed limit, and outputs the speed limit to the determination control circuit. The priority of the speed limit information is assumed to be higher for road signs than for map information (navigation device) on ordinary roads. On the expressway, the VICS information is higher than the fixed road sign.

JP 2002-328048 A Japanese Patent Laid-Open No. 9-50582 JP-A-9-86220 Japanese Patent Laid-Open No. 11-129783 JP 2008-304296 A

  Since Patent Document 1 is based on the idea of changing the color of the backlight, it is necessary to change the color of the entire dial when adapting to the pointer instrument, which complicates the configuration.

  In Patent Document 2, display information such as the brightness, color, and blinking of the pointer can be changed. Further, a pointer similar to the pointer is provided so that the set vehicle speed can be monitored, but the structure of the mechanically moving pointer is complicated.

  Further, a concept of revising the reference speed limit A in accordance with the headlamp and the wiper operation is disclosed. The revised reference speed limit is determined as C = A-10 km / h. When the vehicle speed exceeds the reference speed limit Ckm / h, display information such as the brightness, color, and blinking of the pointer is changed.

  Thus, the idea of giving a margin to the speed limit according to the headlamp and the wiper operation is disclosed. However, Patent Document 2 is a front vehicle following type automatic speed control device. Alarms are also limited to pointer brightness, color, blinking, and the like.

  Patent Document 3 discloses a speed warning device that turns on a signal when a warning speed is exceeded and controls operation / stop of chimes. However, it may be difficult to hear sound due to noise or the like.

  Patent Document 4 relates to an automatic cruise speed control device, in which a speed limit V1 of a traveling road is input from input means. V1-Vc is calculated by subtracting a preset speed width constant Vc from the speed limit V1.

  When the measured actual running speed Vs is smaller than V1-Vc, only the green illumination in the display unit emits light. When the actual running speed Vs is smaller than the speed limit V1 and larger than V1-Vc, the backlight shines with a mixed color of red illumination and green illumination. Since this is a concept of changing the color of the backlight, it is necessary to change the color of the entire dial plate when trying to adapt to the pointer instrument, which complicates the configuration.

  In Patent Document 5, control is performed so that the vehicle speed is displayed by the first pointer and the speed limit is displayed by the second pointer, but an effective warning when the speed limit is exceeded is not disclosed.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is obtained by the driver from the visual inspection of the vehicle instrument when the speed limit is exceeded. An object of the present invention is to provide a vehicle speed display device that can receive a warning more reliably by information.

In order to achieve the above object, the present invention employs the following technical means. That is, according to the first aspect of the present invention, a speedometer that displays the vehicle speed by the movement of the pointer on the dial, an indicator that is provided on the dial and emits light when the speed limit is exceeded, and a character display on the display screen the performed has an image display for numeric displays a limit speed, the control device further controls the image display device and the indicator, and when the vehicle speed the speed limit is exceeded, the indicator to emit light, and an image display It is characterized by erasing the numeric display on the instrument.

According to the present invention, only by visually observing the instrument panel, the difference between the speed limit and the running speed can be recognized sensuously, the structure is not complicated, and the driver can be surely notified that the speed limit is exceeded. Moreover, the digits displayed on the image display device to limit speed, because the indicator emits light, if it exceeds the speed limit, the driver, the information obtained from visual observation instrument for a vehicle, receive more reliably warn It becomes possible. Also, since the numerical display on the image display disappears when the indicator is displayed, the warning effect is great, and the disappearance of the display makes the driver feel anxious and prompts the driver to keep the speed limit.

In the invention according to claim 2 , the indicator displays a warning by characters, and the characters are emitted on the dial plate by transmitted illumination.

  According to this invention, since the indicator is a character that emits light with transmitted illumination on the dial, the warning effect is high.

According to a third aspect of the present invention, the pointer has a light emitting portion that changes a light emission color, and the light emitting portion functions as an indicator.

  According to this invention, the indicator can warn using the change in the emission color of the pointer.

1 is a system configuration diagram of a vehicle speed display device that constitutes a first embodiment of the present invention. FIG. It is a front view of the instrument panel containing the vehicle speed display apparatus in the said 1st Embodiment. It is a flowchart in the control apparatus of FIG. It is a front view of the instrument panel containing the vehicle speed display apparatus which shows 2nd Embodiment of this invention. It is a flowchart in the control apparatus equivalent to FIG. 1 in the said 2nd Embodiment. It is a front view of the instrument panel containing the vehicle speed display apparatus which shows 3rd Embodiment of this invention. It is a flowchart in the control apparatus equivalent to FIG. 1 in the said 3rd Embodiment. FIG. 6 is a front view of an instrument panel including a vehicle speed display device as another embodiment that always displays a white pointer in red and emits a red light to warn of an overspeed limit. It is a front view of the instrument panel containing the vehicle speed display apparatus as other embodiment which shows the example which displayed the differential speed | rate on the image display. It is a front view of the instrument panel containing the vehicle speed display apparatus as other embodiment which shows the example of a display in an image display when a vehicle speed exceeds a speed limit. It is a front view of the speedometer which shows the 1st example of other embodiment which displays a speed limit as a scale. It is a partial cross section figure of the case part in the speedometer which follows the F12-F12 line | wire of FIG. It is a front view of the speedometer which shows the 2nd example of other embodiment which displays a speed limit as a scale. It is a front view of the speedometer which shows the 3rd example of other embodiment which displays a speed limit as a scale. It is a front view of the speedometer which shows the 4th example of other embodiment which displays a speed limit as a scale. It is a front view of the speedometer which shows the 5th example of other embodiment which displays a speed limit as a scale. It is a partial cross section figure of the case part in the speedometer which follows the F17-F17 line | wire of FIG.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration.

  Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a system configuration diagram of a vehicle speed display device constituting a first embodiment of the present invention. In the following embodiments, when the speed limit VL is simply referred to, it can be replaced with a legal speed limit VLs or a margin speed limit VLm described below.

  In FIG. 1, it has the control apparatus 3 which determines the speed limit VL in response to the road speed limit information included in the map information or beacon information of the navigation apparatus 1 or the sign recognition information from the in-vehicle camera 2. Moreover, it has the speedometer 4 which receives the command from the control apparatus 3 which processes the signal regarding the vehicle speed VR from the vehicle speed sensor 40, and displays the vehicle speed VR.

  When the sign recognition information obtained by the in-vehicle camera 2 is obtained, priority is given to the road speed limit information included in the map information or the like of the navigation device 1. Reference numeral 5 denotes a liquid crystal image display (LCD), which is an image display for displaying characters or numbers on the display screen 5a.

  FIG. 2 is a front view of an instrument panel including a vehicle speed display device. FIG. 2A illustrates a state where the vehicle is traveling at a speed within the speed limit. The image display 5 comprising a liquid crystal image display displays the speed limit VL as a number, for example, 40 km / h. Below that, an odometer 5b for displaying the cumulative travel distance as a number is arranged. Reference numeral 6 denotes a tachometer that displays the engine speed.

  FIG. 2B shows a case where the speed limit VL is exceeded. In FIG. 1, when the determined speed limit VL is 60 km / h, when the vehicle speed VR measured by the vehicle speed sensor 40 exceeds 60 km / h, the indicator 7 displayed as SPEEDING is transmitted and illuminated on the dial 9. Lights red.

  FIG. 3 is a flowchart showing a part of the control in the control device 3 of FIG. The control flow of FIG. 3 is executed using a microcomputer (not shown) in the control device 3 of FIG. 1 and ROM and RAM for storage.

  In FIG. 3, when the control is started, in step S31, it is determined whether or not a vehicle speed signal from the vehicle speed sensor 40 (FIG. 1) has come. If so, the process proceeds to step S32, and the speed shown in FIG. A drive signal is supplied from the control device 3 (FIG. 1) to a step motor (not shown) for driving the hands 8 of the total 4, and the hands 8 (FIG. 2) of the speedometer 4 are driven to display the vehicle speed VR.

  Next, it is determined whether or not there is speed limit information from the road sign image-recognized by the in-vehicle camera 2 in step S33 of FIG. If there is speed limit information from the road sign, in step S35, the speed limit is displayed as a number such as 40 km / h in the image display 5 of FIG.

  If there is no speed limit information from the road sign, it is determined in step S34 of FIG. 3 whether there is speed limit information from the navigation device 1 (FIG. 1). The speed limit VL is displayed as a number such as 40 km / h in the second image display 4.

  If there is no speed limit information from the navigation device 1, the process returns to step S31. Following step S35, in step S36, it is determined whether or not the current vehicle speed VR exceeds the speed limit VL.

  In this determination, the vehicle speed VR is subtracted from the speed limit VL to calculate a differential speed VD, and it is determined that the current vehicle speed VR exceeds the speed limit VL when the differential speed VD becomes smaller than 0. Alternatively, it may be determined that the current vehicle speed VR exceeds the speed limit VL when the differential speed VD ≦ 0.

  If the current vehicle speed VR exceeds the speed limit VL, in step S37, the dial 9 of the speedometer 4 is illuminated with the LED illumination on the back surface, and a red SPEEDING warning display, that is, the indicator 7 (FIG. 2) Lights up. Thus, since the warning display of the indicator 7 appears suddenly, the warning effect is high.

  At the same time, the numerical display (for example, 40 km / h) of the speed limit in the image display 5 is deleted. These display changes have the effect of causing the driver to recognize that the speed has been exceeded and also to give anxiety by urging the speed limit display to prompt the driver to view the road signs and reduce the vehicle speed VR.

  Thus, in 1st Embodiment, it has the speedometer 4 which displays the vehicle speed VR by the movement of the pointer 8 which is provided in the instrument panel in a vehicle and moves on the dial 9 of the speedometer 4. And it has the image display 5 which is provided on the instrument panel and displays the speed limit VL numerically.

  Further, the control device 3 (FIG. 1) provided on the dial 9 has an indicator 7 that emits light and displays when the vehicle speed VR exceeds the speed limit VL, and controls the image display 5 and the indicator 7. Prepare. The control device 3 is composed of a microcomputer known as a meter MPU. According to this, it is possible to recognize the difference between the speed limit VL and the vehicle speed VR only by visually observing the vehicle instrument, and the structure is not complicated, and it is possible to reliably notify the driver that the speed limit is exceeded.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof will be omitted, and different configurations and features will be described. FIG. 4 is a front view of an instrument panel including a vehicle speed display device showing a second embodiment of the present invention. FIG. 5 is a flowchart in the control device 3 corresponding to FIG. 1 in the second embodiment.

  Hereinafter, description will be given with reference to the drawings of the first embodiment. In FIG. 5, when the control is started, it is determined in step S51 whether or not a signal is received from the vehicle speed sensor 40 (FIG. 1). If the signal is received, the process proceeds to step S52, where a signal is sent to a step motor (not shown) of the speedometer 4 (FIG. 4) to drive the pointer 8 and display the vehicle speed VR.

  Next, in step S53 of FIG. 5, it is determined whether there is information on the legally limited speed VLs from the road sign recognized by the in-vehicle camera 2 (FIG. 1). If there is information on the legal speed limit VLs from the road sign, the legal speed limit VLs is determined as 40 km / h in step S56.

  If there is no legal speed limit information from the road sign, it is determined in step S54 whether there is information on the legal speed limit VLs from the map information or the like of the navigation device 1 (FIG. 1). In step S56 of FIG. 5, the legal speed limit VLs is determined as 40 km / h.

  If there is no information on the legal speed limit VLs from the navigation device 1, the process returns to step S51. After step S56, in step S57, the marginal speed range VW is calculated from the legally limited speed VLs. In this calculation, the marginal speed width VW corresponding to the legally limited speed VLs may be selected and extracted from the map stored in the RAM. However, in this second embodiment, the marginal speed width VW is calculated from the following Equation 1. Arithmetic.

(Formula 1) Marginal speed range VW = (statutory speed limit VLs−30) × 1/7
For example, when the legally limited speed VLs is 100 km / h, the marginal speed width VW = 10 km / h calculated from (100−30) × 1/7. When the legally limited speed VLs is 80 km / h, the marginal speed width VW = 7.1 km / h calculated from (80-30) × 1/7. Further, when the legally limited speed VLs is 50 km / h, the marginal speed width VW is 2.9 km / h.

  The 1/7 coefficient of Equation 1 can be arbitrarily changed by the driver in the setting mode of the vehicle instrument. Further, when a plurality of marginal speed widths VB for a plurality of legally limited speeds VLs are stored as a map in the RAM, the driver can arbitrarily select the stored marginal speed width VW in the vehicle setting mode of the vehicle instrument. Can be changed.

  Specifically, the switch installed in either the instrument panel or the steering is operated to set the vehicle setting mode in which the vehicle instrument can be set up, and the margin speed range VW can be set by the switch operation in the vehicle setting mode. Can be changed. It can also be set from the touch switch screen of the navigation device 1. Further, the marginal speed width VW may be determined uniformly as 10% of the legally limited speed VLs.

  Next, an allowance limit speed VLm to be compared with the vehicle speed VR is obtained by subtracting the allowance speed width VW from the legal limit speed VLs. Next, in step S58, it is determined whether or not the current vehicle speed VR exceeds the margin limit speed VLm.

  In this determination, the vehicle speed VR is subtracted from the marginal speed limit VLm to calculate a differential speed VD, and when the differential speed VD becomes smaller than 0, it is determined that the current vehicle speed VR exceeds the marginal speed limit VLm. . Alternatively, it may be determined that the current vehicle speed VR exceeds the margin limit speed VLm when the differential speed VD ≦ 0.

  When the speed limit VLm is exceeded, in step S59, the dial 7 of the speedometer 4 in FIG. 4 (b) is illuminated with the LED illumination on the back side, and the indicator 7 consisting of a red SPEEDING warning indicator is turned on. Let Since the warning display suddenly appears in this way, the warning effect is high.

  According to this, since the warning is issued at the margin limit speed VLm before the legal limit speed VLs, it is possible to travel more safely. When the margin limit speed VLm is exceeded, it is possible for the driver to reliably receive a warning by information obtained from visual observation of the vehicle meter.

  Further, the marginal speed width VW is a value determined in advance, and is set to a larger value as the legally limited speed VLs increases. As a result, the higher the legally limited speed VLs, the faster the vehicle travels, and it is possible to prevent accidents, slip accidents, and center-over accidents in a vehicle traveling ahead.

(Third embodiment)
Next, a third embodiment of the present invention will be described. Features different from the above-described embodiment will be described. FIG. 6 is a front view of an instrument panel including a vehicle speed display device showing a third embodiment of the present invention. FIG. 7 is a flowchart in the control device 3 corresponding to FIG. 1 in the third embodiment.

  In FIG. 7, when the control is started, it is determined in step S71 whether or not a signal from the vehicle speed sensor 40 (FIG. 1) is coming. If so, the process proceeds to step S72 in FIG. The indicator 8 is driven by a step motor (not shown) of the speedometer 4 to display the vehicle speed VR.

  Next, in step S73, it is determined whether there is information on the legally limited speed VLs from the road sign image-recognized by the in-vehicle camera 2 (FIG. 1). If there is information on the legal speed limit VLs from the road sign, the legal speed limit VLs is determined as 40 km / h in step S76.

  If there is no information on the legal speed limit VLs from the road sign, it is determined in step S74 whether there is information on the legal speed limit VLs from the navigation device 1 (FIG. 1). The legally limited speed VLs is determined as 40 km / h.

  If there is no information on the legal speed limit VLs from the navigation device 1, the process returns to step S71. After step S76, in step S77, the marginal speed range VW is calculated from the legally limited speed VLs. In this calculation, the marginal speed range VW corresponding to the legally limited speed VLs may be selected and extracted from the map stored in the RAM. However, in this third embodiment, the marginal speed range VW is obtained from the above equation 1. Yes. That is, the marginal speed width VW is obtained as (legal limit speed VLs−30) × 1/7.

  For example, when the legally limited speed VLs is 100 km / h, the marginal speed width VW is 10 km / h. Further, when the legally limited speed VLs is 80 km / h, the marginal speed width VW is 7.1 km / h. Further, when the legally limited speed VLs is 50 km / h, the marginal speed width VW is 2.9 km / h.

  The 1/7 coefficient can be arbitrarily changed by the driver in the setting mode of the vehicle instrument. Further, when the marginal speed range VW with respect to the legally limited speed VLs is stored as a map in the RAM of the control device 3 in FIG. 1, the driver can arbitrarily set the marginal speed range VW stored in the vehicle instrument. Can be changed in mode.

  Next, in step S77 of FIG. 7, the marginal limit speed VLm is obtained by subtracting the marginal speed width VW from the legal limit speed VLs. Next, in step S78, it is determined whether or not the current vehicle speed VR exceeds the margin limit speed VLm.

  In this determination, the vehicle speed VR is subtracted from the marginal speed limit VLm to calculate the differential speed VD1, and when the differential speed VD1 becomes smaller than 0, it is determined that the current vehicle speed VR exceeds the marginal speed limit VLm. . Alternatively, it may be determined that the current vehicle speed VR exceeds the margin limit speed VLm when the differential speed VD1 ≦ 0.

  If the vehicle speed VR exceeds the marginal limit speed VLm, the dial 9 of the speedometer 4 in FIG. 6 is transmitted through the back side LED illumination to turn on an orange SPEEDING warning display in step S79. That is, the first indicator display for displaying the first indicator 7a is executed. Thus, the first indicator 7a has a high warning effect because a warning display suddenly appears.

  Next, in step S80, it is determined whether or not the current vehicle speed VR exceeds the legal speed limit VLs. In this determination, the vehicle speed VR is subtracted from the legal speed limit VLs to calculate a differential speed VD2, and when the differential speed VD2 becomes smaller than 0, it is determined that the current vehicle speed VR exceeds the legal speed limit VLs. . Alternatively, it may be determined that the current vehicle speed VR exceeds the legal speed limit VLs when the differential speed VD2 ≦ 0.

  If the speed limit VLs is exceeded, in step S81, the dial 9 of the speedometer 4 in FIG. 6 is illuminated with a filter or LED illumination of a different color on the back side, and a red SPEEDING warning is displayed. 2nd indicator display which lights 2 indicator 7 is performed.

  As described above, in the third embodiment, when the vehicle speed VR exceeds the margin limit speed VLm, the first indicator 7a emits and displays the first (orange) color, and the vehicle speed VR exceeds the legal limit speed VLs. In this case, the second indicator 7 is lit and displayed in a second (red) color different from the first color. According to this, when the vehicle speed VR exceeds the legal limit speed VLs, the second indicator 7b is lit and displayed in the second color different from the first color, so the warning effect is greater.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows. For example, in each of the above-described embodiments, the character display that appears by emitting light with transmitted illumination on the dial is used as the indicators 7, 7a, 7b. However, the indicator light emission color of the speedometer may be changed.

  FIG. 8 shows another embodiment showing a state in which the white pointer 8 is always lit and displayed in red to warn that the vehicle speed VR exceeds the speed limit VL (the legal speed limit VLs or the marginal speed limit VLm). It is a front view of the instrument panel containing the speed display apparatus for vehicles. As the configuration of the light emitting portion of the pointer 8 for causing the pointer 8 to emit light, a known configuration can be adopted.

  Next, in the first and second embodiments described above, the vehicle speed VR is calculated by subtracting the vehicle speed VR from the speed limit VL, and the current vehicle speed VR is limited when the differential speed VD becomes smaller than 0. It is determined that the speed VL is exceeded. Alternatively, it is determined that the current vehicle speed VR exceeds the speed limit VL when the differential speed VD ≦ 0, but the image display 5 displays how much the differential speed VD is. Also good.

  FIG. 9 shows an example in which the differential speed VD is displayed when the vehicle speed VR exceeds the speed limit VL (VLm or VLs) on the image display 5 that normally displays only the odometer 5b. It is a front view of the instrument panel containing the speed display apparatus for vehicles. In FIG. 9, the differential speed VD is displayed in red in the image display 5 such that the speed exceeds 3 km / h in red.

  Next, FIG. 10 includes a vehicle speed display device as another embodiment showing a display example when the vehicle speed VR exceeds the speed limit VL in the image display 5 that is always displaying only the odometer 5b. It is a front view of an instrument panel. When the speed limit VL is exceeded, the speed limit VL is displayed in red or orange as “limit speed 60 km / h”.

  Next, in the first embodiment, the magnitude of the speed limit VL is numerically displayed on the image display 5, but is not displayed on the speedometer 4 having the pointer 8. However, the magnitude of the speed limit VL may be displayed by a light emitting display on the scale of the speedometer 4 described below.

  Similarly, in the second embodiment, the magnitude of the speed limit VL is not displayed at all, but may be displayed by a light emission display of the scale of the speedometer 4 described below. Similarly, although the speed limit VL is not displayed in the third embodiment, it may be displayed by a light emission display on the scale of the speedometer 4 described below.

  FIG. 11 is a front view of the speedometer 4 showing a first example of another embodiment for displaying the speed limit VL on a scale. FIG. 12 is a partial cross-sectional view of the case portion in the speedometer 4 taken along line F12-F12 in FIG.

  In the speedometer 4 of FIG. 11, as shown in FIG. 12, a plurality of tubes 16 partitioned by a shielding case 15 and an LED light source 17 that emits light independently in each tube 16 are provided on the outer periphery of the speedometer 4. And having a configuration in which the same scale 18 as the speed limit VL is caused to emit light by turning on the LED light source 17.

In FIG. 11, only the scale 18 indicating the speed limit of 60 (km / h) emits red light. A dial design illumination light source 19 disposed on the circuit board 20 is provided on the back surface of the dial 9 in FIG. In FIG. 12, the hands 8 and the step motor for driving the hands 8 are omitted. Next, FIG. 13 shows the speedometer 4 showing a second example of another embodiment for displaying the speed limit VL on a scale. It is a front view. The speedometer 4 in FIG. 13 emits seven LED light sources that are arranged on the outer periphery of the scale 22 near the speed limit of 60 km / h or less in green.

  FIG. 14 is a front view of the speedometer 4 showing a third example of another embodiment for displaying the speed limit VL on a scale. The speedometer 4 in FIG. 14 emits a plurality of (11 in FIG. 14) light sources that emit light in red, which are arranged on the back of the scale 23 near the speed limit of 60 km / h.

  Next, FIG. 15 is a front view of the speedometer 4 showing a fourth example of another embodiment that displays the speed limit VL on a scale. The speedometer 4 in FIG. 15 causes the speed limit scale 23 to emit red light. Further, six scales 24 less than the vicinity of the speed limit are made to emit green light.

  Next, FIG. 16 is a front view of the speedometer 4 showing a fifth example of another embodiment for displaying the speed limit VL on a scale. The speedometer 4 in FIG. 16 emits the scale 25 near the speed limit 60 km / h (one lower side of the speed limit) in orange. Further, five scales 26 less than the vicinity of the speed limit are made to emit green light. Furthermore, 11 scales 27 exceeding the speed limit are made to emit red light.

  FIG. 17 is a partial cross-sectional view of the case portion in the speedometer 4 taken along line F17-F17 in FIG. As shown in FIG. 17, in order to cause the scale to emit light in different colors, for example, a liquid crystal display 28 that can change the color is arranged on the back surface of the scale 26 as a colored filter, and the LED light source 17 is used as a backlight. .

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Car-mounted camera 3 Control apparatus 4 Speedometer 5 Image display 7 Indicator 7a 1st indicator 7b 2nd indicator 8 Pointer 9 Dial 15 Shielding case 16 Cylinder 17 LED light source which light-emits in a cylinder 18 Scale 19 Dial design Light source for illumination 20 Circuit board 22 to 27 Scale 28 Filter 40 Vehicle speed sensor VD, VD1, VD2 Differential speed VL Speed limit VLm Margin limit speed VLs Legal limit speed VR Vehicle speed VW Margin speed range

Claims (3)

A speedometer that displays the vehicle speed by the movement of the pointer on the dial,
An indicator that is provided on the dial and emits light when a speed limit is exceeded;
It performs character display on the display screen, an image display for numeric displays a limit speed,
And a control device for controlling the image display and the indicator,
The vehicle speed display device, wherein when the vehicle speed exceeds the speed limit, the indicator emits light and the numerical display on the image display is erased. The vehicle speed display device according to claim 1 , wherein the indicator displays a warning by characters, and the characters emit light on the dial by transmitted illumination. 2. The vehicle speed display device according to claim 1 , wherein the pointer includes a light emitting unit that changes a light emission color, and the light emitting unit functions as the indicator.

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