JPH06144112A - Display device for vehicle - Google Patents

Abstract

PURPOSE:To provide a vehicle display device capable of surely transmitting an intention such as gratitude to the driver of another vehicle via a simple action. CONSTITUTION:A vehicle display device 100 is mainly constituted of an indicator 10, its control device 20, clips 30R, 3OL, a power plug receptacle 40, and an action confirming lamp 50. The continuing period of the on/off signal having the preset cycle blinking the direction indicator lamp of a vehicle is counted. The preset time longer than one cycle of the on/off signal and shorter than two cycles is set. When the continuing period is shorter than the preset time, the on/off signal is judged to be outputted once, and the indicator 10 is operated. The intention of a driver shown on the indicator 10 can be surely transmitted to the driver of another vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular display device having a display which can be seen by other vehicles.

[0002]

2. Description of the Related Art Conventionally, for example, when a lane change is made by interruption while the vehicle is traveling, there are cases where it is desired to express some gratitude to the drivers of the vehicle who made the interruption. This includes direct expression methods such as raising the hands lightly to the drivers of other vehicles, and indirect methods such as turning on existing indicators such as direction indicators or headlamps on the vehicle for a certain period of time. The present situation is that there are only such expressions.

[0003]

However, the expressions such as the above-mentioned thank-you are simple because they need to concentrate on driving, and
It is desirable to be able to communicate reliably. For this reason, with expression methods such as thank-you, such as raising your hand or using an existing display device in the vehicle, you may not be able to concentrate on driving or you need to operate switches that are not in the original driving operation. Not good. Further, even if the above operation is performed, it was doubtful whether or not the intention here is transmitted to the drivers of other vehicles.

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to ensure that the driver of another vehicle can thank others by a simple operation. A vehicle display device capable of transmission is provided.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the structure of the invention is such that a level change of an indicator provided in a vehicle and visible from the surroundings, and an on / off signal for blinking a direction indicator lamp of the vehicle. A cycle detecting means for detecting a cycle, and a time longer than one cycle of the on / off signal detected by the cycle detecting means and shorter than two cycles as a predetermined time, and in synchronization with the level transition of the on / off signal. Timer means for starting the time measurement, resetting and restarting the time measurement at each level transition time of the on / off signal, and defining a continuation period in which the on / off signal is continuously output, and a time means by the timer means. And a level transition detecting means for detecting the level transition of the on / off signal in the above, and the level transition being detected by the level transition detecting means. Without said when a predetermined time has elapsed, characterized in that a signal output means for outputting a display signal for driving the display on the display device.

[0006]

The timer means starts the clocking in synchronization with the level transition of the on / off signal having a predetermined cycle of blinking the direction indicator lamp of the vehicle. Further, the timer means counts a predetermined time longer than one cycle and shorter than the two cycles of the on / off signal. Further, the timer means resets and restarts the clock every time the level of the on / off signal changes. Therefore, when the ON / OFF signal is output in a predetermined cycle and its level transition occurs, the period from the start of the time counting by the timer means is updated one after another to be the continuous period. Then, the level transition detecting means detects the level transition of the on / off signal during the time counting by the timer means.

Here, if a new on / off signal is not read by the timer means within a predetermined time, the level transition detection means determines that no on / off signal is detected, and the signal output means outputs a display signal for driving the display. Is output to. Next, when a new on / off signal is read by the timer means within a predetermined time, the level transition detecting means determines that the on / off signal is detected, and the signal output means does not output the display signal for driving the display to the display. become. Similarly, when a new ON / OFF signal is read within the next predetermined time, the display signal is not output to the display.

As described above, the presence or absence of the reading of a new on / off signal within a predetermined time by the timer means is determined, and the presence or absence of the display on the display is determined. Further, the driving of the display unit by the signal output means is prevented until the duration defined by the timer means ends based on the series of on / off signals. That is, the vehicle display device of the present invention also serves as an on / off signal based on a direction indicating signal based on the operation of the direction indicating lever, the direction indicating lamp is blinked when changing the direction, and the on / off signal is used once as necessary. By doing so, the display on the display can be performed.

[0009]

EXAMPLES The present invention will be described below based on specific examples. FIG. 1 is a block diagram showing a vehicle display device according to the present invention. The vehicular display device 100 mainly includes a display device 10, a control device 20 thereof, clips 30R and 30L, a power plug outlet 40, and an operation confirmation lamp 50. The display device 10 is formed so that the panel surface 11 is illuminated by a lamp from the inside or that the panel surface 11 itself has LEDs and the like arranged in letters and emits light. Then, for example, necessary characters to be displayed on the panel surface 11 of the display device 10 are fixedly installed inside the rear window of the vehicle so that the drivers of other vehicles can easily confirm them. or,
A control device 20 described later is connected to the display device 10.

The clips 30R, 30L receive the right or left direction indicating signals S _R, S _L which are ON / OFF signals having a predetermined cycle for blinking the right or left direction indicating lamps L _R, L _L of the vehicle. Are provided at the tips of the signal input lines L _S. Then, the direction instruction rear right and left wired in a vehicle trunk lamp L _R, is electrically connected to the signal line L _L. By operating a direction indicating lever (not shown) of the vehicle, the direction indicating signals S _R, S _L on either the left or the right are output to the direction indicating lamps L _R, L _L on the right or the left. Further, the power plug outlet 40 is inserted into a socket (not shown) for a cigarette lighter of a vehicle, and supplies power to the control device 20 and the like via a power supply line L _D. The operation confirmation lamp 50 is disposed in the middle of the power supply line L _D from the power plug outlet 40 to the display device 10, and it can be confirmed whether or not the display of the display device 10 is performed by lighting the lamp 50. The operation confirmation lamp 50 is fixed on the front panel at a place where it is easy to confirm without disturbing the drivers. Furthermore,
The central portion of the lamp 50 serves as a push button switch 51. By pushing the push button switch 51, the operation can be interrupted even if the vehicular display device 100 is in operation.

FIG. 2 is a vehicle display device 1 according to this embodiment.
2 is a block diagram showing the configuration of the control device 20 in 00. The control device 20 has an interface 21.
And a CPU 23, a ROM 23 storing a control program, and a RAM 24 storing various data. The on / off signal, which is a direction instruction signal, is input to the CPU 22 via the interface 21. An output signal from the CPU 22 is output to the display device 10 via the interface 21, and the display device 10 is operated based on this output signal.

In the RAM 24, a signal cycle storage area 241 for storing the signal cycle of the on / off signal and a predetermined time storage area 242 for storing a predetermined time set based on the signal cycle of the on / off signal are formed. The contents of the signal period storage area 241 and the predetermined time storage area 242 are updated each time a direction instruction signal is input, as described later.

Next, the CP used in the apparatus of this embodiment.
Based on the flowchart of FIG. 3 showing the processing procedure of U22, description will be made with reference to the time charts of FIGS. 4 and 5. In the time chart of FIG. 4, the on / off signal X is output as a direction instruction signal to change the direction of the vehicle, and in the time chart of FIG. 5, the on / off signal X is output as a display signal and the device of this embodiment is operated. It corresponds to. When the ignition switch of the vehicle is turned on, first, in step 100, initialization is executed. Next, the process proceeds to step 102, waits until the on-off signal X is read (level transition), then proceeds to step 104, and time counting by the timer is started (time t ₀ shown in FIG. 4). Next, in step 106, the on / off signal X
It is determined whether or not there is a new level transition of. The determination in step 106 is based on the predetermined time T in step 108.
It is executed repeatedly until a has passed. The predetermined time Ta in this case is the initial setting in step 100 described above.
It is preset to, for example, 2 seconds, which is the maximum time of the direction instruction signal output based on the direction instruction lever of the vehicle.

First, the processing when the on / off signal X which is the direction designating signal shown in FIG. 4 is read will be described. Since the on / off signal X has a new level transition by the time when the preset predetermined time Ta ends, the routine proceeds to step 110. In step 110,
The period Tc of the on / off signal read in step 102 and step 106 is calculated by the timer counter,
It is stored in the signal period storage area 241 of the RAM 24. Next, in step 112, an actual predetermined time Ta that is longer than one cycle and shorter than two cycles of the on / off signal calculated in step 110 instead of the initial setting value is set,
It is stored in the storage area 242 of the RAM 24 for a predetermined time. Here, the relationship between the period Tc of the on / off signal and the predetermined time Ta is 2Tc>Ta> Tc, for example, Ta = Tc × 1.5.
Is set.

Next, in step 114, the timer for the predetermined time Ta is reset and restarted, and then the process proceeds to step 116. Is there a new level transition of the on / off signal X as in step 106 described above? It is determined whether or not. If there is a level transition in step 116, step 1
18, the predetermined time T set in step 112
The timer of a is reset and restarted repeatedly (from time t ₀ to time t ₁ shown in FIG. 4).
Then, if there is no new level transition of the on / off signal X even if the predetermined time Ta has elapsed in step 120, it is determined that the on / off signal X, which is a series of directional signals, has ended, and the process proceeds to step 102 described above. The same processing is repeatedly executed after waiting for the reading of the on / off signal. On the basis of the on / off signal X, from time t ₀ to time t ₂ shown in FIG. 4 is set as the continuous period Y, and the display signal Z is prohibited from being output within this continuous period Y.

Next, the processing when the on / off signal X which is the display signal shown in FIG. 5 is read will be described. In step 102, after waiting for the reading of the on / off signal X, the process proceeds to step 104 and the time counting by the timer is started (time t ₀₀ shown in FIG. 5). Next, in step 106, it is determined whether or not there is a new level transition of the on / off signal X. The determination in step 106 is repeatedly executed until the predetermined time Ta in step 108 has elapsed.

Since there is no new level transition of the on / off signal X by the time t ₀₁ (= t ₀₀ + Ta) when the predetermined time Ta ends, the routine proceeds to step 122. Step 122
Then, after outputting the display signal Z to the display device 10, the process shifts to step 102 described above, and the same processing is repeatedly executed after waiting for the reading of the next on / off signal. When the on / off signal X, which is a display signal, is first read after the ignition switch is turned on, a predetermined time T
Although a is a little longer, for example, 2 seconds which is set in advance, the display signal Z is similarly output when the predetermined time Ta ends.

As described above, in the vehicle display device of the present invention, since it also serves as the direction indicating signal from the direction indicating lever arranged in the vicinity of the steering wheel of the vehicle, a special switch is used for inputting the signal. There is no need to provide such.
The input by the direction indicating lever is no different from the operation for changing the direction, and since the number of operations is limited to one, it is possible to concentrate on the driving and not hinder the original driving operation. In other words, thanks to the drivers of other vehicles who had the display interrupted by a simple operation using the direction indicating lever. For example, the word "Thank you" is displayed, Feelings are surely transmitted. As a result, it is possible to expect an effect that communication between vehicles, which has been rare in the past, can be achieved.

As the display device 10, in addition to the one having the panel surface 11 as described above, a display portion is provided on a stuffed doll or the like, and at the same time as the display portion, an operation for bowing the stuffed doll is performed. It may be a compound operation such as addition.

FIG. 6 is a block diagram showing another embodiment in which the control device 20 in the above-described vehicle display device 100 is a control circuit having a hardware structure. Direction indicator of the right and left by operating the direction instruction lever (not shown) of the vehicle lamp L _R, right and left output to L _L either direction indication signal S _R,
S _L is input from the clips 30R and 30L electrically connected to those signal lines to the respective waveform shaping circuits 210R and 210L via the signal input line L _S. In the waveform shaping circuits 210R and 210L, direction indication signals S _{R and} S
_{The L} is waveform-shaped into a square wave and then the OR circuit 22
Input to 0. Output signal A from this OR circuit 220
Is input to the input terminal (T) of the retriggerable one-shot multivibrator 230 that constitutes the timer means and the timer circuit 280 that counts one cycle Tc of the on / off signal A. The output of the timer circuit 280 is the latch circuit 290.
Via the retriggerable one-shot multi-vibrator 230 and the one-shot multi-vibrator 240. The timer circuit 280 is cleared at the time when the timer time overflows if the output signal A is level transition only once. In this case, the previous value stored in the latch circuit 290 is adopted again.

The above-mentioned output is connected to the resistors R _1, R _2, R _{3 and} R ₄ of the retriggerable one-shot multivibrator 230 and the one-shot multivibrator 240 in series, and the transistors Tr ₁ , Tr ₂ , Tr ₃ and Tr ₃ , It is input to the base of Tr ₄ and turns on the transistor. Then, the time constants of the retriggerable one-shot multi-vibrator 230 and the one-shot multi-vibrator 240 are set by the CR circuit formed by the combination of one or more resistors and capacitors in which the transistors are turned on.

That is, for example, the resistance R ₁ is 100 kΩ and the resistance R is
₂ (1/2) 100kΩ, resistor R ₃ (1/4) 100kΩ, resistor R ₄ (1 /
8) 100kΩ. Then, for example, if the output from the latch circuit 290 is (1,1,1,1), all the transistors T
r ₁ , Tr ₂ , Tr ₃ , Tr ₄ are turned on. Since the total resistance at this time is parallel connection, [1 / {1+ (1/2) + (1/4) + (1 /
8)}] It becomes 100 kΩ. In this way, the retriggerable one-shot multivibrator 230 sets the time constant corresponding to the time interval at which the level of the turn signal changes in accordance with the resistance and the capacitance of the capacitor C ₀ . Further, the time constant of the one-shot multivibrator 240, which is slightly longer than the time constant of the retriggerable one-shot multivibrator 230, is set by the resistance of the total resistance and the resistance of the capacitor C ₀ added to the resistance R ₅ . The time constant of the retriggerable one-shot multivibrator 230 becomes the predetermined time Ta. Further, the time constant of the one-shot multivibrator 240 becomes the judgment time Tj for detecting the level transition for judging the continuation of the on / off signal. The one-shot multivibrator 240 constitutes a level transition detecting means.

The output signal B from the output terminal (Q) of the retriggerable one-shot multivibrator 230 is
It is input to the input terminal (T) of the one-shot multivibrator 240. Further, the output signal E from the output terminal (-Q) of the retriggerable one-shot multivibrator 230 is input to the input terminal (D) of the flip-flop circuit 250 that achieves the determination means in the subsequent stage. An output signal C is output from the output terminal (Q) of the one-shot multivibrator 240, and an output signal D from the output terminal (-Q) is input to the clock input terminal (CK) of the flip-flop circuit 250. . Then, the output signal F from the output terminal (Q) of the flip-flop circuit 250
Is input to the input terminal (T) of the one-shot multivibrator 260 that achieves the signal output unit in the subsequent stage, and also to the reset input terminal (R) of itself. Then, the output signal G from the output terminal (Q) of the one-shot multivibrator 260 is output to the base of the transistor forming the display circuit 270.

The control circuit is configured as described above, and the transistor of the display circuit 270 is turned on only during the time when the signal G is input, and the display is performed on the panel surface 11. The collector side of the transistor that specifically constitutes the display circuit 270 is connected to the vehicle-mounted battery 60 via the LED, which is a light emitting element provided on the panel surface 11, and the power plug outlet 40. Further, an operation confirmation lamp 50 and a push button switch 51 are connected in series between the panel surface 11 and the power plug outlet 40. As described above, it is possible to confirm the display of the display 10 by turning on the operation confirmation lamp 50, and it is possible to interrupt the operation even if the vehicle display device 100 is in the middle of operation by pressing the push button switch 51. . The push button switch 51 has a built-in delay timer longer than the output time of the signal G. Therefore, when the push button switch 51 is once pushed to turn off the display circuit 270, the same signal G
Is not turned on during the output time of and is not displayed again.

Next, the operation of the control circuit of the apparatus of this embodiment at the time of changing the direction will be described with reference to FIG. The direction designating signal S _R or S _L at the time of direction conversion is input to the waveform shaping circuits 210R and 210L, and the OR circuit 220 outputs a repeating rectangular wave of Tc period like the signal A.
In this embodiment, as the direction indicating signal based on the operation of the direction indicating lever, the rectangular wave of the signal A is repeatedly output five times when the direction is changed by one of the right and left turns.
Then, the signal B from the retriggerable one-shot multivibrator 230 rises at the same time as the first rising time t _{0 of} the signal A, and is reset and restarted at each rising of the Tc cycle repeated rectangular wave of the signal A.
Then, the signal B falls at a time t ₃ which is a predetermined time Ta after the rising time t ₂ of the fifth rectangular wave which is the last of the signal A. That is, the signal B is at the H level during the period from the time t ₀ to the time t ₃ and is in the continuous period.

On the other hand, the signal E from the retriggerable one-shot multivibrator 230 is the inverted state of the signal B. Further, the signal C from the one-shot multivibrator 240 rises at the same time as the first rising time t ₀ of the signal A and falls at the time t ₁ set by the time constant. That is, the signal C is at the H level during the period from the time t ₀ to the time t ₁ and is the determination time Tj for detecting the level transition of the on / off signal. Incidentally, Tj> Ta. on the other hand,
The signal D from the one-shot multivibrator 240 is in the inverted state of the signal C. Then, in the flip-flop circuit 250, the signal D changes from the time t ₀ to the time t _1.
Until then, the signal E is at H level during the period from time t ₀ to time t ₃ . Therefore, at the time t _{1 at} which the clock input terminal (CK) transits from the L level to the H level, the input terminal (D) is at the H level, so the flip-flop circuit 2
The signal F from the output terminal (Q) of 50 remains L level.

Here, for example, the direction indicating signal S is input twice, and the signal A from the waveform shaping circuit 210 is assumed to be two rectangular waves. Then, the signal B is at the H level during the period (Tc + Ta) from the time t ₀ , and the signal C is at the H level during the period from the time t ₀ to the time t ₁ as well, because of the relationship (Tc + Ta)> Tj F does not transit to H level.

Next, referring to FIG. 8, a case where the apparatus of this embodiment is operated will be described. Direction signal S at this time
, The waveform shaping circuit 210 outputs a rectangular wave once like the signal A. Then, the signal B from the retriggerable one-shot multivibrator 230 rises at the same time as the first rising t ₀₀ of the signal A, and falls at time t ₀₁ after a predetermined time Ta. That is, the signal B is at the H level during the period from time t ₀₀ to time t ₀₁ , which is a continuous period.
On the other hand, retriggerable one-shot multivibrator 2
The signal E from 30 is the inverted state of the signal B.

The one-shot multivibrator 24
The signal C from 0 rises at the same time as the first rising t ₀₀ of the signal A, and falls at the time t ₀₂ set by the time constant. That is, the signal C is at H level during the period from time t ₀₀ to time t _02, which is the determination time Tj for detecting the level transition of the on / off signal. Incidentally, Tj> Ta. on the other hand,
The signal D from the one-shot multivibrator 240 is in the inverted state of the signal C. Therefore, in the flip-flop circuit 250, the signal D _changes from the time t ₀₀ to the time t _00.
Until ₀₂ , the signal E is at H level during the period from time t ₀₀ to time t ₀₁ . Therefore, at time t ₀₂ when the clock input terminal (CK) changes from the L level to the H level, the input terminal (D) has already changed from the L level to the H level.
The signal F from the output terminal (Q) of the flip-flop circuit 250 rises from the L level to the H level at time t ₀₂ . Further, at the same time as the rising, the flip-flop circuit 25
Since 0 is reset, the signal F becomes a pulse signal having a constant width.

Then, the signal G from the one-shot multivibrator 260 rises at the same time as the rising time t ₀₂ of the signal F and falls after a predetermined time (for example, 5 seconds). That is, the display circuit 27 only for this predetermined time.
The signal G is output to 0 and the display 10 is activated. As described above, also in the vehicle display device of the present embodiment, the same effect can be obtained by the same operation as that of the above-described embodiment device.

[0031]

The present invention is constructed as described above, and by displaying the duration of the on / off signal having a predetermined cycle for blinking the direction indicator lamp of the vehicle, whether or not the vehicle display device can display. Is determined. That is, the conventional signal output to the direction indicator lamp is used, and the indicator is activated when the input signal is input only once. Thus, the vehicle display device of the present invention has a simple configuration,
It is possible to surely convey the intention shown on the display to the drivers of other vehicles.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a vehicle display device according to a specific embodiment of the present invention.

FIG. 2 is a block diagram showing a control device in the device of the embodiment.

FIG. 3 is a flowchart showing a processing procedure of a CPU used in the apparatus of the embodiment.

FIG. 4 is a timing chart illustrating a case where a direction designating signal is input a plurality of times to change the direction in the apparatus of the embodiment.

FIG. 5 is a timing chart illustrating a case where the display device is actuated by inputting a direction indicating signal once in the apparatus of the embodiment.

6 is a block diagram showing another embodiment in which the control device in the vehicle display device of FIG. 1 is a control circuit having a hardware configuration.

7 is a timing chart showing a signal state in each signal line when a direction indicating signal is input a plurality of times in FIG. 6 to change the direction.

FIG. 8 is a timing chart showing a signal state in each signal line in the case where the direction indicator signal is input once in FIG. 6 and the display operates.

[Explanation of symbols]

10 ... Display device 20 ... Control device 30R, 30L ... Clip 40 ... Power plug outlet 50 ... Operation confirmation lamp 100 ... Vehicle display device L _D ... Power supply line L _S ... Signal input line

Claims (1)

[Claims] 1. A display device which is disposed in a vehicle and is visible from the surroundings, a cycle detection unit which detects a cycle of level transition of an on / off signal for blinking a direction indicator lamp of the vehicle, and a cycle detection unit which detects the cycle. A time longer than one cycle of the on / off signal and shorter than two cycles is set as a predetermined time, and time measurement is started in synchronization with the level transition of the on / off signal, and the time is measured at each level transition of the on / off signal. Timer means for resetting and restarting, and for defining a continuation period during which the on / off signal is continuously output, and level transition detecting means for detecting the level transition of the on / off signal during the time counting by the timer means. If the predetermined time elapses without the level transition detection means detecting the level transition, the display Vehicle display apparatus characterized by comprising a signal output means for outputting to the display device a display signal for driving the.