JPH1086768A - Vehicular information indication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give a visual information to a driver without increasing a signal wire for a prescribed volume space and a complicate signal treating. SOLUTION: An voltage change is judged by making the signal from an output part consisting at an information output part 32 for outputting an output information as a voltage change to a direct current signal and transmitting by a telescoping rod 60 and providing plural series circuits of a resistances R21, R22 and a zenor diodes ZD1, ZD2 in an indication circuit 50. A luminescence information is outputted at the indication part 20 by the luminescence by the light on and off or continuous luminescence of red LED 22R or yellow LED 22Y or blue LED 22B by the judgement of the series circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle information display device such as an abnormal approach warning display device for improving a driver's sense of vehicle width by using corner poles attached to left and right of a front bumper and a rear bumper of a vehicle body. Especially,
The present invention relates to a vehicle information display device incorporating a light emitting diode (hereinafter, simply referred to as “LED”).

[0002]

2. Description of the Related Art Conventionally, fender markers, corner poles, and the like are sometimes mounted near the ends of fenders located on the left and right sides in front of the body of an automobile in order to improve the driver's sense of vehicle width. Such fender markers, corner poles, and the like incorporate a light source such as a small light bulb in a body made of a transparent or translucent resin, or take light from a light bulb of a vehicle side light, and light guide light using an optical fiber. I have.
At night, these light sources are used to improve the driver's sense of vehicle width.

[0003]

The conventional fender marker and the corner pole are configured as described above, so that the driver can easily check the side portions of the vehicle body and can improve the sense of the vehicle width.

[0004] In the recent highly information-oriented society,
Automobiles also tend to require a variety of information transmission functions, and it is desirable to add various functions to fender markers and corner poles.

At present, a distance sensor for measuring the distance between the vehicle body and an object around the vehicle visually informs the driver of the distance information between the vehicle body and the object around the vehicle, so that the driver can sense the width of the vehicle more. Some devices have a function of measuring a distance between a vehicle body and an object around the vehicle body so that the vehicle body can be improved.

However, when the distance information between the vehicle body and the surrounding objects is identified by the color of the LED, it is necessary to insert many signal lines into the extendable corner pole. If many signal lines are inserted into the telescopic corner pole, it is difficult to insert many signal lines into the telescopic corner pole, and it is expected that the telescopic operation cannot be performed smoothly. Then, when the signal line is thinned, there is a problem that the probability of disconnection of the signal line increases.

In order to solve this problem, there is a method in which optical coupling is performed between the tip of the corner pole and the base of the corner pole. However, it is necessary to provide a power supply line between the tip and the base of the corner pole and a circuit for performing photoelectric conversion at the tip of the corner pole, and the tip of the corner pole cannot be compactly assembled.

That is, if a plurality of LEDs are mounted in a limited volume space such as a stretchable corner pole or the like, and vehicle information is output by the emission color, there is a problem in wiring. Therefore, an object of the present invention is to provide a vehicle information display device capable of providing a driver with visual information without increasing the number of signal lines for a predetermined volume space and without performing complicated signal processing. It is assumed that.

[0009]

According to a first aspect of the present invention, there is provided a vehicle information display device which outputs an output information as a voltage change, transmits a signal from the output circuit as a DC signal through a transmission line, and outputs a signal. A display circuit for judging the voltage change by providing a plurality of series circuits with the Zener diode, causing the LEDs to emit light based on the judgment of the series circuit, and displaying the LED by the light emission; and a series circuit of the resistor and the Zener diode. Is used to output light emission information by a logic circuit using a judgment output of a voltage change generated by the LED and more LEDs than the number of series circuits of the resistor and the Zener diode.

[0010]

Embodiments of the present invention will be described below.

FIG. 1 is a perspective view showing a state in which a vehicle information display device according to an embodiment of the present invention is mounted. FIG. 2 is a cross-sectional view showing a vehicle information display device according to an embodiment of the present invention.
And a front view (b) of a main part of an upper end thereof.

In FIG. 1, at a left corner of a front bumper FB of a vehicle body CA, a corner pole body 1 to which a vehicle information display device of the present embodiment is mounted is disposed. While holding the steering wheel ST, the driver can check the upper part of the corner pole body 1 to which the vehicle information display device is attached in use through the windshield FG.

In FIG. 1 and FIG. 2, in the present embodiment, a predetermined height (length) is set or a flag or the like is attached as required. The corner pole body 1 has a cylindrical upper cylindrical body 1a which is extended to the uppermost stage and has one end sealed, a cylindrical intermediate cylindrical body 1b which is extended to the middle stage and both ends are opened, and a lowermost stage. The lower end located is composed of a cylindrical lower cylindrical body 1c sealed by a configuration described later. The upper cylinder 1a, the middle cylinder 1b, and the lower cylinder 1c
Has a known corner pole structure. The base of the lower cylinder 1c is a container for accommodating the distance sensor 10, and in particular, in the present embodiment, accommodates the distance sensor 10 and a light emission control circuit 30 for controlling the display of the output as described later. For this purpose, the lower end of the lower cylindrical body 1c is formed thick. The distance sensor 10 has an ultrasonic oscillator 11 and a measuring circuit 12 for measuring a distance to an object by the ultrasonic oscillator 11. The output of the measurement circuit 12 is input to a light emission control circuit 30 including a printed circuit board 13 on which an electronic component for controlling the measurement result as a light emission color of the LED 22 is mounted. The distance sensor 10 according to the present embodiment emits ultrasonic waves from the ultrasonic transducer 11 inserted and disposed in the insertion hole 1A of the cylindrical lower cylinder 1c, and communicates with the left object of the vehicle body CA. It is configured to detect a distance between.

The ultrasonic transducer 11 and the measuring circuit 12 constituting the distance sensor 10 and the printed circuit board 13 constituting the light emission control circuit 30 are molded integrally with a synthetic resin so as to maintain airtightness and be integrated. I have. The outer shape is densely insertable into the base of the thicker lower cylinder 1c.

The ultrasonic vibrator 11 is wrapped by an interference member (not shown) in its housing, and extremely reduces ultrasonic vibration applied to the printed circuit board 13 and the like.

The upper end of the upper cylinder 1a is connected to the members constituting the upper cylinder 1a and the LED 22 (which does not mean a single LED, but the red LED 22R, the yellow LED 2R of the present embodiment).
2Y, blue LED 22B) are integrated with a synthetic resin and sealed with the synthetic resin.

A vertically long oval window hole 20A of about 20 to 30 mm is provided about 10 mm below the upper end of the upper cylindrical body 1a.
(See FIG. 2B). The oval window hole 20A is installed so as to face the driver when attached to the vehicle body CA. At an internal position facing the window hole 20A of the upper cylindrical body 1a, light emitted from the LED 22 is guided to the window hole 20A. That is, the display unit 20 includes a diffusion lens 21R in which the red LED 22R provided on the printed board 23 is molded together with the printed board 23, and a yellow LED 22Y provided on the printed board 23
The diffusion lens 21Y molded with the printed circuit board 23, and the diffusion lens 21B molded together with the printed circuit board 23 with the blue LED 22B is molded and integrated with another synthetic resin, and the upper part of the upper cylindrical body 1a is formed. Is fixed near the window hole 20A. These red LED 22R and diffusion lens 21R, yellow LED 22Y and diffusion lens 21
The display section 20 of the present embodiment is constituted by the Y, blue LED 22B, the diffusion lens 21B, and the window hole 20A in the upper part of the upper cylinder 1a. The space between the upper and lower sides of the diffusion lens 21R, the diffusion lens 21Y, and the diffusion lens 21B is shielded from light by white paint or aluminum foil. Further, the diffusion lens 21R, the diffusion lens 21Y, and the diffusion lens 21B have a surface that is uniformly exposed from the window hole 20A, and the surface is a rough surface formed by graining or cutting. Red LED22R, Yellow LED
22Y and a blue LED 22B. In this embodiment, the surface on the side of the printed circuit board 23 may be a reflection surface. In this manner, the window hole 20A has directivity since light does not diverge to other portions.

When the present invention is implemented, the LEDs 22 include a red LED 22R, a yellow LED 22Y, and a blue LED 22B.
However, when implementing the present invention, the red LED 22R, the yellow LED 22Y, and the blue LE
D22B does not require three colors, red LED
One or two colors of the 22R, the yellow LED 22Y, and the blue LED 22B, that is, multiple colors can be used. In addition, the emitted colors can be mixed. Of course, three primary colors can be used.

At the lower end of the lower cylinder 1c of the present embodiment,
Pedestal 40 and screw part 41, screw part 4 attached to vehicle body CA
1 and a pedestal 40 and a nut 42
A cushion plate 43 and a spring washer 44 for restricting the rotation of the nut 42 on the rear surface of the vehicle body CA are provided between the upper and lower surfaces of the vehicle body CA so as to be stably mounted on the upper curved surface of the vehicle body CA. The power supply line 15 is led out through the screw portion 41.

The recessed groove 1D located below the window hole 20A is for winding a string for attaching a flag or the like. Although not shown, a ring for passing the string for attaching a flag or the like to the pedestal 40 is also provided. It is arranged.

The power and electric signals from the light emission control circuit 30 to the display unit 20 to which the signal of the distance sensor 10 is input are output as follows.

The signal processed by the microcomputer or the like of the light emission control circuit 30 is obtained by converting the transmission output information into a DC voltage change, and then attaching the double nut 6 to the insulating substrate 14 of the lower cylinder 1c.
It is transmitted by a lead wire 65 to a rod antenna-shaped telescopic rod 60 fixed at 4. The telescopic rod 60 includes a conductive first-stage rod 61, a second-stage rod 62, and a third-stage rod 63. The telescopic rod 60 has the same mechanical structure as a known rod antenna. The required number of the telescopic rods 60 are the insulating guides 6 provided.
7 and an insulating guide 68 are arranged on the central axis (concentric) of the corner pole body 1. The upper end of the third stage rod 63 determines the input voltage change,
It is connected to a display circuit 50 that controls lighting of the ED 22. The display circuit 50 shown in FIG. 2 is housed in a conductor case insulated from the third-stage rod 63 and has the circuit configuration shown in FIG. 5, and the ground potential is set to the lower cylinder 1c, middle cylinder 1b, and upper cylinder. 1a.

FIG. 3 shows a control circuit for controlling the light output of the vehicle information display device according to the embodiment of the present invention.

As shown in FIGS. 2 and 3, the vehicle information display device of the present embodiment shown in FIG. 2 includes a distance sensor 10, a light emission control circuit 30 and the like inside a lower cylinder 1c of the corner pole body 1. Built-in. Also, the LED 2 of the display unit 20
2 is red LED22R, yellow LED22Y and blue LE
D22B output is obtained.

The printed circuit board 13 has an LED 22
A light emission control circuit 30 for controlling the ultrasonic wave and other necessary circuits are mounted, and the ultrasonic vibrator 11 is a measuring circuit 12 for driving and controlling the ultrasonic vibrator 11 provided in another part. And the distance sensor 10 is formed in a pair.
The measurement circuit 12 includes a circuit necessary for transmitting and receiving ultrasonic waves from the ultrasonic transducer 11 and an output circuit thereof.
The light emission control circuit 30 is formed of a one-chip microcomputer and has a CPU, a ROM, and a RAM. On the output side, a red output transistor T1, a yellow output transistor T1, and a blue output transistor T1 are provided as the light emission output unit 31. The outputs of the red output transistor T1, the yellow output transistor T1, and the blue output transistor T1 are output from the information output unit 3.
2 is input.

The LED 22 controls the light emission of the LEDs 22R, 22Y, and 22B of different colors by a light emission control circuit 30 to generate desired light, and the light is transmitted to the display unit 20 of the upper cylinder 1a. The light is emitted to the outside through the window 20A, and the desired light is blinked or turned on.

Further, in the vehicle information display device of the present embodiment, the ultrasonic transducer 11 as the distance sensor 10 is connected to the input side of the light emission control circuit 30 so that the predetermined body CA and the obstacle on the side thereof can be connected. The distance is detected, and the LE corresponding to the distance is detected.
D22 is controlled to emit light to predetermined emission light to emit warning light. The distance sensor 10 is an ultrasonic sensor that measures the distance between the vehicle body CA and an obstacle on the side at the time of parking, parking, or the like that needs to be recognized by the driver, and is not used in the present embodiment. Inputs information from a speedometer, and the vehicle speed is lower than a predetermined vehicle speed, for example, 10 km
/ H or less, the light emission control circuit 30 can be brought into the operating state.

In the present embodiment, although not shown, the power supply from the power supply line 15 is turned on when the vehicle speed falls below a predetermined vehicle speed, for example, 10 km / h. And when you are.
That is, in the present embodiment, although not shown, power is supplied to the light emission control circuit 30 when the output of the speed sensor becomes 10 km / h or less.

Next, the operation of the light emission control circuit 30 of the vehicle information display device of the present embodiment shown in FIG. 3 will be described.

FIG. 4 is a flowchart showing the operation of the light emission control circuit 30 of the vehicle information display device according to the embodiment of the present invention. FIG. 5 is an output of the light emission control circuit 30 of the vehicle information display device of the embodiment of the present invention. And information output unit 32 and display circuit 5
FIG. 4 is a circuit diagram illustrating a relationship of 0.

In the present embodiment, when the output of the speed sensor falls below 10 km / h, power is supplied to the light emission control circuit 30 and this program is executed.

When the output of the speed sensor becomes 10 km / h or less and power is supplied to the LED 22, the light emission control circuit 30, the distance sensor 10, and the like, first, in step S1, initialization is performed, and in step S2, a predetermined value is initialized. An ultrasonic wave is transmitted for a time (several μs or less), and after a predetermined time in step S3, a reflected wave of the output ultrasonic wave is detected, and step S3 is performed.
The distance is calculated from the reception delay of the transmitted / received ultrasonic signal in step 4, and it is determined whether the distance calculated in step S5 is equal to or greater than a predetermined minimum distance threshold L. If it is determined that the distance is not equal to or greater than the predetermined minimum distance threshold L, LE is output in step S6 with red output.
Flashes red in D22R. When it is confirmed that the distance calculated in step S5 is equal to or greater than the predetermined minimum distance threshold L, it is determined whether the distance calculated in step S7 is equal to or greater than the predetermined intermediate distance threshold M. When it is determined, the yellow LED 22Y is turned on and off by the yellow output in step S8. When it is confirmed that the distance calculated in step S7 is equal to or greater than the predetermined middle distance threshold M, it is determined whether the distance calculated in step S9 is equal to or greater than the predetermined maximum distance threshold H, and is determined not to be equal to or greater than the predetermined maximum distance threshold H. When
In step S10, the blue LED 22B is caused to blink blue by the blue output. When it is determined that the distance calculated in step S9 is equal to or greater than the predetermined maximum distance threshold value H, in step S11, the blue LED 22B is turned on by the blue LED to emit blue light continuously.

Further, the red output, yellow output, and blue output of the light emission control circuit 30 of the present embodiment correspond to the red LED 22R and the yellow LED 2 of the display section 20 of the display circuit 50 as follows.
Output to 2Y, blue LED 22B.

A red output, a yellow output of the light emission control circuit 30,
The blue output turns on each of the red operating transistor T1, the yellow operating transistor T2, and the blue operating transistor T3. When there is no red output, yellow output, or blue output,
Red operating transistor T1, yellow operating transistor T
2. The blue operating transistor T3 is turned off. The red operating transistor T1, the yellow operating transistor T2, and the blue operating transistor T3 are turned on by pull-up resistors R1, R
2, the potential at the connection point of the red operating transistor T1, the yellow operating transistor T2, and the blue operating transistor T3, which are pulled up by R3, is reduced, and the light emitting elements D1, D2, and D3, which are LEDs that constitute a photocoupler, are turned off. Phototransistor light receiving elements T11 and T1
2. Turn off T13. The resistance R11 when the light receiving element T11 is off, the resistance R12 when the light receiving element T12 is off, the light receiving element T
When the switch 13 is off, the resistor R13 is connected in series.

The red operating transistor T1, the yellow operating transistor T2, and the blue operating transistor T3 are turned off when the red operating transistor T1, the yellow operating transistor T2, and the blue operating transistor are pulled up by the pull-up resistors R1, R2, and R3. The potential at the connection point of T3 is raised, the light emitting elements D1, D2, and D3, which are LEDs that constitute a photocoupler, are turned on, and the light receiving elements T11, T12, and T13 that are phototransistors are turned on. When the light receiving element T11 is on, the resistor R11 is short-circuited, and the light receiving element T11 is turned off.
When 12 is on, the resistor R12 is short-circuited, and when the light receiving element T13 is on, the resistor R13 is short-circuited.

These resistors R11, R12 and R13 are
It is connected to the adjust input of the three-terminal regulator VC. The output of the three-terminal regulator VC is connected to a resistor R11, a resistor R12, and a resistor R13 connected in series via a resistor R10.

The output of the three-terminal regulator VC is a resistor R
11, the voltage fluctuates due to the change in the resistance of the series circuit of the resistor R12 and the resistor R13. In this embodiment, when the red output transistor T1 is turned on by the red output, the light emitting element D1 constituting the photocoupler is turned off, and the light receiving element T11 is turned off, only the resistor R11 is turned on, and the resistors R12 and R13 are turned on.
Is short-circuited, and at this time, the three-terminal regulator VC
Is 10 V or more. When the yellow operation transistor T2 is turned on by the yellow output, the light emitting element D2 constituting the photocoupler is turned off, and the light receiving element T12 is turned off,
Only the resistor R12 enters, the resistors R11 and R13 are short-circuited, and the output of the three-terminal regulator VC is 8.5 or more.
It becomes less than 10V. When the blue operation transistor T3 is turned on by the blue output, the light emitting element D3 constituting the photocoupler is turned off, and the light receiving element T13 is turned off, the resistance R
13, only the resistor R11 and the resistor R12 are short-circuited, and the output of the three-terminal regulator VC becomes less than 8.5. The output of the three-terminal regulator VC is connected to the display circuit 50 via the telescopic rod 60.

In the display circuit 50, a series circuit of a resistor R21 and a zener diode ZD1 and a series circuit of a resistor R22 and a zener diode ZD2 are connected in parallel between the telescopic rod 60 and the ground. The potential at the connection point between the resistor R21 and the Zener diode ZD1 is determined by the inverter (NOT circuit) NO.
The telescopic rod 60 is connected via T1 and the inverter NOT2.
Between the power supply line connected to the red LED 22R and the resistor R
31 series circuits are connected. The connection point potential of the resistor R22 and the Zener diode ZD2 connects the series circuit of the yellow LED 22Y and the resistor R32 between the inverter NOT3 and the output of the inverter NOT2 via the inverter NOT4. Further, a blue LED 22B is provided between the output of the inverter NOT3 and the power supply line connected to the telescopic rod 60.
And a series circuit of a resistor R33. The Zener voltage of the Zener diode ZD1 is equal to the Zener diode ZD2.
Is set higher than the Zener voltage.

By the Zener diode ZD1 and the Zener diode ZD2, the potential of the connection point of the resistor R21 and the Zener diode ZD1 or the potential of the connection point of the resistor R22 and the Zener diode ZD2 becomes a Zener voltage, and the input is constant regardless of the power supply voltage. is there. Therefore, the inputs of the inverters NOT1 and NOT3 are always constant. However, since the power supply lines (not shown) for operating the inverters NOT1 to NOT4 are connected between the telescopic rod 60 and the ground, the inverters NOT1 to NOT4 change when the power supply of the inverters NOT1 to NOT4 changes. The threshold at which the output switches from “H” to “L” or from “L” to “H” changes. That is, when the power supply voltage is high, the threshold value rises, and the outputs of the inverters NOT1 and NOT3 become "H". When the power supply voltage is low, the threshold value decreases, and the outputs of the inverters NOT1 and NOT3 become "L".

Here, when the potential of the power supply line connected to the telescopic rod 60 is high, the resistance R21 and the Zener diode ZD
1 connection point potential, resistance R22 and zener diode ZD
2 is a Zener voltage and the inverter NOT1
Of the inverter NOT3 and the threshold value of the inverter NOT3, thereby increasing the output of the inverter NOT1 and the inverter N3.
The output of OT3 becomes "H", the input of inverter NOT2 and the output of inverter NOT4 become "L". Therefore, current flows through the series circuit of the red LED 22R and the resistor R31, and the red LED 22R emits light.

When the potential of the power supply line connected to the telescopic rod 60 decreases, the Zener voltage of the Zener diode ZD1 is set higher than the Zener voltage of the Zener diode ZD2. The output of NOT4 becomes "L", and the output of inverter NOT3 becomes "H". Therefore, a current flows through a series circuit of the yellow LED 22Y and the resistor R32, and the yellow LED 22Y emits light.

When the potential of the power supply line connected to the telescopic rod 60 is lower, the output of the inverter NOT2 becomes "H", the output of the inverter NOT4 becomes "H", and the output of the inverter NOT3 becomes "L". Becomes Therefore, a current flows through a series circuit of the blue LED 22B and the resistor R33, and the blue LED 22B emits light.

That is, when the output of the three-terminal regulator VC is 1
When the voltage is 0 V or more, the Zener diodes ZD1 and ZD2 conduct, the outputs of the inverters NOT2 and NOT4 become "L", and the inverters NOT
The output of No. 3 becomes "H", and the red LED 22R emits light. The output of the three-terminal regulator VC is 8.5 or more to 10
When the voltage is less than V, the Zener diode ZD1 is non-conductive, the Zener diode ZD2 is conductive, and the inverter NOT2
Is "H", the output of inverter NOT4 is "L",
The output of the inverter NOT3 becomes “H” and the yellow LED
22Y emits light. When the output of the three-terminal regulator VC is less than 8.5, the Zener diodes ZD1 and ZD2 are non-conductive, the output of the inverter NOT2 is "H", the output of the inverter NOT4 is "H", and the output of the inverter NOT3 is "L". And blue LED2
2B emits light.

At this time, if the output of the three-terminal regulator VC is intermittent, the red LED 22R, the yellow LED 22Y,
The blue LED 22B flashes. If the output of the three-terminal regulator VC is continuous at less than 8.5, the blue LED 2
2B will be lit continuously.

In the vehicle information display device according to the present embodiment, the transmission circuit including the corner pole body 1 and the telescopic rod 60 is used to change the output circuit including the light emission output section 31 and the information output section 32 to the display circuit 50. Although information is transmitted, when the present invention is implemented, a transmission line including the corner pole body 1 and the telescopic rod 60 may be accommodated in the corner pole body 1 to accommodate two conductors. Of course, the corner pole body 1 and the telescopic rod 60 according to this embodiment
The transmission line composed of can also be used as a power line instead of the telescopic rod 60 by using a wire cable or the like that expands and contracts the corner pole body 1 automatically.

In the vehicle information display device according to the present embodiment, the case where the vehicle information display device is used as a corner pole has been described. However, in the case where the present invention is implemented, it is preferable to use the vehicle information display device for a vehicle having a vehicle body at a ground potential. In addition to the corner pole, it can be used for a fender marker, a rearview mirror with a display unit, a fender mirror, a door mirror, and the like. Of course, it can also be used for display inside or outside other vehicles.

In the present embodiment, since the power supply line and the signal line are shared, the number of lines constituting the transmission line can be minimized.

In this embodiment, as shown in FIG. 4, a red LED 22R, a yellow LED 22Y, a blue LED
Although the ED 22B is set to blink and the blue LED 22B is set to continuously emit light, when the present invention is implemented, the red LED 22R and the yellow LED 22Y are continuously turned on by the routine of Steps S5 to S8. The distance calculated in S7 is a predetermined middle distance threshold M
If the above is confirmed, the blue LED 22B can be turned on continuously.

That is, this operation will be described with reference to FIG. 4. Initialization is performed in step S1, ultrasonic waves are transmitted for a predetermined time (several μs or less) in step S2, and after a predetermined time in step S3. Detecting a reflected wave of the output ultrasonic wave, calculating a distance from a reception delay of the transmitted and received ultrasonic signal in step S4, and determining whether the calculated distance in step S5 is equal to or greater than a predetermined minimum distance threshold L, When it is determined that the distance is not greater than or equal to the predetermined minimum distance threshold L, the red LED is turned on by the LED 22R in step S6 with a red output. When it is confirmed that the distance calculated in step S5 is equal to or greater than the predetermined minimum distance threshold L, it is determined whether the distance calculated in step S7 is equal to or greater than the predetermined intermediate distance threshold M. When it is determined, the yellow LED is turned on by the yellow LED 22Y by the yellow output in step S8. When the distance calculated in step S7 is confirmed to be equal to or more than the predetermined middle distance threshold M,
In step S11, blue light is turned on by the blue LED 22B by the blue output. This operation is a flowchart in which steps S9 and S10 in FIG. 4 are omitted.

As described above, the vehicle information display apparatus of the present embodiment uses the light emission control circuit 30 to transmit the distance information of the distance sensor 10.
, An output circuit comprising a light emitting output unit 31 and an information output unit 32 for outputting the output information as a voltage change, and a signal from the output circuit as a DC signal as a telescopic rod 60.
The voltage change is determined by providing a plurality of series circuits of resistors R21 and R22 and zener diodes ZD1 and ZD2, and the red LED 22R or the yellow LED 2 of the LED 22 is determined based on the determination of the series circuit.
In a vehicle information display device including a display circuit 50 for causing the 2Y or blue LED 22B to blink or emit light continuously and displaying the light by the light emission, determination of a voltage change generated by a series circuit of the resistors R21, R22 and the Zener diodes ZD1, ZD2. The output is output by a logic circuit composed of inverters NOT1 to NOT4, using three types of red LED22R, yellow LED22Y, and blue LED22B, which are three types of red LED22R, yellow LED22Y, and blue LED22B, which are more than the two series circuits of resistors R21, R22 and zener diodes ZD1, ZD2. Things.

Therefore, distance information from the output circuit including the light emitting output unit 31 and the information output unit 32 that outputs the output information as a voltage change is output via an apparently single transmission line including the telescopic rod 60. Therefore, it can be configured without increasing the number of signal lines, can be controlled mechanically stably, and can prolong the mechanical and electrical life of the transmission line. Further, since a judgment output of a voltage change is obtained by comparing a power supply voltage applied to a series circuit of the resistors R21 and R22 and the Zener diodes ZD1 and ZD2 with a Zener voltage, light emission information is separated without performing complicated signal processing. In addition, since the light emission output is used, the driver can be provided with necessary visual information in a limited space. In particular, the size and cost can be reduced as compared with those using a window comparator or the like. Also, a large number of information expressions can be performed on the display unit 20 by a combination of continuous lighting and blinking. And the resistor R2
1 and R22, and a determination output based on a comparison between the power supply voltage applied to the Zener diodes ZD1 and ZD2 and the Zener voltage is obtained by a logic circuit including inverters NOT1 to NOT4.
The resistors R21 and R22 and the Zener diodes ZD1 and ZD
Three types of red LEDs 22 more than the number of series circuits with 2
The light emission information is output by the R, yellow LED 22Y, and blue LED 22B. The information can be separated by a simple circuit, and the display circuit 50 can be built in a limited space.

Further, according to the present embodiment, when the vehicle body CA is in a garage or parked at a low vehicle speed less than a predetermined speed, the distance sensor 10 determines the distance between the vehicle body CA and the object on the side of the vehicle body CA. Measure and LED2 according to the distance
2, that is, three types of red LED22R and yellow LED22
Y, the emission color output of the blue LED 22B is changed. The driver can measure the distance to the object on the left side of the vehicle body CA by confirming the output of the three types of red LED 22R, yellow LED 22Y, and blue LED 22B, so that even an amateur can accurately and quickly move the vehicle. be able to.

The corner pole body 1 attached to the vicinity of the left end of the vehicle body CA according to the present embodiment has an overall shape approximating the outer shape of a known corner pole, and can adopt any form. This contributes to improving the design of the vehicle body CA. A distance sensor 1 is provided inside the corner pole body 1.
0, which accommodates the light emission control circuit 30 and can be operated only by introducing an external power supply, so that the vehicle information display device can be made compact and independent, and is suitable for mounting and maintenance.

In particular, in the present embodiment, the distance sensor 10 and the light emission control circuit 30 inside the corner pole body 1
On the other hand, when the output of the speed sensor is 10 km / h or less and the turning on of the ignition switch is determined by a logic circuit to control the gate of the power supply, the power generated by turning on the ignition switch is directly supplied to the corner pole body 1. May be supplied to the distance sensor 10, the light emission control circuit 30, and the like. In this type of embodiment, in a normal traveling state, the blue light is continuously turned on unless the vehicle is traveling at a location where an obstacle exists on the side of the vehicle body CA. In this type of embodiment, the above-described function can be provided by attaching the vehicle information display device of the present embodiment by retrofitting.

In the present embodiment, the distance is calculated based on the output of the distance sensor 10, and three types of red LED 22R and yellow LED 2
2Y, four steps including blinking of the blue LED 22B and continuous lighting of the blue LED 22B are performed. In a normal driving state, LE is changed depending on other information, for example, the vehicle speed.
The color of the light emitted from the D22 is controlled, and the distance sensor 10 is controlled only when the output of the speed sensor falls to 10 km / h or less.
May be set to the operating state.

When the amount of light is large, such as in the daytime, the vehicle information display device can change the duty ratio of the blinking cycle and set the light emission to a reddish color which is considered to be a color that is easily seen by the Purkinje effect. As a result, the emission color of the vehicle information display device can be set to a preferable color according to the amount of light as the external environment, and the driver can always clearly see the vehicle information display device regardless of the change in the amount of light. it can.

The distance sensor 1 of each of the above embodiments
0, one or more distance sensors 10 can be provided so as to detect obstacles in front and side of the vehicle body AC. Also, a plurality of sensors are combined to form the corner pole body 1
It is also possible to provide separately. The distance sensor 21 disposed inside the corner pole body 1 is one of an ultrasonic sensor, an optical sensor, and another proximity switch.
And a sensor having characteristics matching the distance to be detected can be used, and the reliability of detection can be improved.

Further, in each of the above embodiments, the LEDs 22 are arranged in three colors of red, yellow and blue LEDs 22R, 22Y, 22Y.
2B, these three-color LEDs 22R, 22 are not necessarily used as long as a plurality of colors necessary for giving a meaning such as a warning can be expressed by using different-color LEDs 22.
It is not necessary to use Y, 22B, and any one or more of these three colors can be used.
Although the types of colors that can emit light are limited, similar effects can be obtained. However, the three color LEDs 22R, 2
When 2Y and 22B are used, a plurality of distance information can be expressed, and an effect that a use range is widened can be obtained.

Further, the corner pole body 1 for carrying out the present invention may use a warning for one specific application as a display as in each of the above embodiments. Can be used as a warning display common to a plurality of applications.

The corner pole body 1 of the present embodiment
Has been described in the case of expanding and contracting in three stages, but in the case of implementing the present invention, it can be used for one that expands and contracts in two or more stages, Can also be used.

[0061]

As described above, the vehicle information display device according to the first aspect of the present invention provides an output circuit for outputting output information as a voltage change, a signal from the output circuit being transmitted as a DC signal through a transmission line, and a resistance signal. And a display circuit for displaying an LED based on the determination of the voltage change by providing a plurality of series circuits of the resistor and the Zener diode. The logic circuit outputs the judgment output of the voltage change generated by the circuit, and outputs the light emission information by the number of LEDs larger than the number of the series circuit of the resistor and the zener diode.

Therefore, the configuration can be made without increasing the number of signal lines of the transmission line from the output circuit that outputs the output information as a voltage change, and the judgment output of the voltage change generated by the series circuit of the resistor and the Zener diode is complicated. Since the light emission information is separated without performing any signal processing and the light emission information is used as the light emission output, necessary visual information can be given to the driver in a limited space. The logic circuit outputs the judgment output of the voltage change generated by the series circuit of the resistor and the Zener diode, and outputs the light emission information by the number of LEDs larger than the number of the series circuit of the resistor and the Zener diode. A large number of information can be separated by a simple circuit, and a display circuit capable of separating a large number of information can be built in a limited space.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a vehicle information display device according to an embodiment of the present invention is mounted.

FIG. 2 is a sectional view (a) showing a vehicle information display device according to an embodiment of the present invention and a front view (b) of a main part of an upper end thereof.

FIG. 3 is a control circuit for controlling the light output of the vehicle information display device according to the embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of a light emission control circuit of the vehicle information display device according to the embodiment of the present invention.

FIG. 5 is a circuit diagram showing a relationship between an output of a light emission control circuit, an information output unit, and a display circuit of the vehicle information display device according to the embodiment of the present invention.

[Explanation of symbols]

 CA Body 1 Corner pole body 10 Distance sensor 22 LED 22R Red LED 22Y Yellow LED 22B Blue LED 30 Light emission control circuit 31 Light emission output unit 32 Information output unit 50 Display circuit 60 Telescopic rod R21, R22 Resistance ZD1, ZD2 Zener diode NOT1 to NOT4 Inverter

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H01L 33/00 H01L 33/00 L

Claims (1)

[Claims] An output circuit that outputs output information as a voltage change, a signal from the output circuit is transmitted as a DC signal through a transmission line, and a plurality of series circuits of a resistor and a Zener diode are provided. In the vehicle information display device, comprising: a display circuit that causes the light-emitting diode to emit light by the determination of the series circuit and displays the light-emitting diode based on the light emission. A vehicle information display device, wherein light-emitting information is output by a logic circuit using light-emitting diodes greater than the number of series circuits of the resistor and the zener diode.