JPS60249077A - Display device for automobile - Google Patents

Abstract

PURPOSE:To make effective use of a display by displaying selectively the information on a rear obstruction and the information on operating time. CONSTITUTION:A control circuit part 2 started by an ignition switch 5 selects the information from a distance detector 3 up to the rear obstruction by responding to the on of a back switch 4 and the information on the operation displayed on a display device 1 is changed over to the information on the rear obstruction. The effective use of the display is made possible by such common use of the display by the selective display.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device for a motor vehicle that selectively displays rear obstacle information and driving time information of the motor vehicle.

[Prior art]

Conventionally, there is a system that detects an obstacle behind the vehicle when the vehicle is reversing and displays the detected obstacle in the vehicle interior. The rear obstacle detection is performed for each of a plurality of regions where the rear of the vehicle is divided, and the positions of the detection regions are aligned and displayed. Such obstacle detection display is normally performed only when the vehicle is reversing. Therefore, the display is not used except when the vehicle is reversing.

[Problem that the invention seeks to solve]

The present invention uses a plurality of display elements to display the position of a rear obstacle when reversing, and uses the plurality of display elements to display driving time during normal times other than when reversing. The aim is to make effective use of the information.

[Structure of the invention]

Therefore, the present invention detects the presence of an obstacle in each of the plurality of regions where the rear region of the vehicle is divided, and generates a first visual signal that displays the presence of the obstacle corresponding to the detection region. a detection means, a reversing detection means for detecting when the automobile is reversing, and a driving time measuring means for measuring the driving time of the automobile and generating a second display signal for displaying the elapsed time step by step every time a predetermined time elapses. means for displaying a rear obstacle or driving time by arranging a small number of display elements in a predetermined direction (a number equal to the number of display elements divided into the rear area of the vehicle), which is provided in the vehicle interior; A second display signal is applied to the display means to display a number of display elements corresponding to the driving time of the automobile, and when the reversing detection means detects that the automobile is reversing, the obstacle detection means The present invention is characterized by comprising a switching means for applying the first conventional signal to the display means instead of the second conventional signal to activate the display element at a position corresponding to the area where the obstacle exists.

〔Effect of the invention〕

Since the present invention is configured as described above, the plurality of display elements arranged in a predetermined direction are used to display a rear obstacle according to the position of the rear obstacle when the vehicle is backing up, and when the vehicle is backing up, When driving, multiple display elements are used to display the vehicle's driving time and provide a guideline for long-distance driving, and these display elements are effective for displaying rear obstacles and driving time. It has an excellent effect that it can be used for.

〔Example〕

An embodiment of the present invention is shown in FIG. 1. Reference numeral 1 denotes a display device consisting of a plurality of light emitting elements (for example, fluorescent display tubes), including a display section 101 for showing a vehicle picture and a 7-segment display for displaying numbers. parts 111, 112, 113° 114, and point display part 12
1,122, a display section 131 indicating parking, a display section 141 indicating the unit of distance, display sections 151, 152, 153, 154 that are likened to the rear bumper of a vehicle, and a body weight that is likened to the license plate of the vehicle. A display section 161 showing a picture;
Display section 171°172 that looks like a vehicle stop lamp
and rsTOPJ character display section 173. The display sections 171, 172 and 173 are composed of red light emitting elements, the display sections 151 to 154 are yellow, and the other display sections are composed of green light emitting elements. 2 is a control circuit unit that instructs which light emitting element of the display 1 is to be lit; 3 is a distance detector that detects the distance to an obstacle using ultrasonic waves; and 4 is a reversing unit whose contacts close when the bank gear is engaged. 5 is an ignition switch, and 6 is a storage battery.

FIG. 2 is a block diagram showing details of the control circuit section 2,
The power source of each block section is connected to a constant voltage power source 201 (not shown in the figure). 211.212,213
is a resistor, 214 is a transistor, 220 is an oscillation circuit that generates a pulse signal of a constant frequency using a crystal resonator, etc.;
231 is a time generation circuit that generates a time signal of the current time using the pulse signal from the oscillation circuit 220; 241 is a time measurement circuit that generates parking time and driving time using the pulse signal from the oscillation circuit 220; 251 is a circuit that generates a time signal from the NOR gate 262; This is a reset circuit that generates a reset pulse based on changes in the signal. The time measuring circuit 241 has a counter for measuring parking time and a counter for measuring driving time, each of which is reset by receiving a cent pulse from the reset circuit 251 and by receiving a pulse signal from the oscillation circuit 220. Measure time. A counter for measuring driving time is used to measure driving time after a certain period of time has elapsed (for example, 30 minutes).
minutes) elapses, the light emitting element 151 of the display 1. 152
．． 153. 154 is generated on the output line 341, and when a time of 2 hours or more is measured, a signal is generated on the output line 351 that causes the light emitting element 161 indicating the rest pictogram to be lit. The counter for measuring the parking time generates a signal on the output line 312 that causes the 7-segment display sections 111, 112, 113, and 114 of the display 1 to display the measured parking time numerically. This time measurement circuit 241 also includes dot display sections 121 and 122 that indicate time units.
A signal is generated on lines 322 and 332 to turn on the light.

252 is a fixed time circuit that generates a fixed time circuit (for example, a signal that is "1" for 30 seconds) from the time when the input signal falls, 261. 264 is an inhark gate, 262
．． 26'" 3, 265 is a NOR gate, and 271 is a distance processing circuit that receives a signal from the distance detector 3 and generates a signal such as a distance signal to an obstacle. This distance processing circuit 2
71 and the distance detector 3 have the same configuration as the "Rear Obstacle Display Device for Vehicles" disclosed in Japanese Patent Application Laid-Open No. 59-5979.
Perform the same operation. That is, the distance detector 3 has four transducers 32 to 3d for detecting obstacles in each of the four divided regions of the rear region of the vehicle, and the distance processing circuit 271 has four transducers 3a to 3d. 3d performs a rear obstacle detection operation and generates a signal on the output line 313 that numerically displays the distance to the nearest obstacle among the detected obstacles for each area, and the nearest obstacle is detected. A signal is generated on the output line 342 to indicate in which of the four regions it is located, and the distance unit is r m J.
A signal for displaying the decimal point in the distance display is generated on the output line 361, and a signal for displaying the decimal point in the distance display is generated on the output line 333.
is activated to generate a signal on output line 371 indicating that an obstacle is in the danger area.

232. 242, 243 and 272 are switch circuits in which the input signal line and the output signal line are connected when a signal connecting the input and output arrives, and the output becomes high impedance when a signal disconnecting the supporting input and output arrives; 2
80 is the switch circuit 232, 242, 243, 27
This is a display drive circuit that lights up the light emitting elements of the display device 1 according to the output signal from the display device 2.

The operation of the above configuration will be explained.

In FIG. 2, when the driver gets into the vehicle and turns on the ignition switch 5, voltage is applied from the storage battery 6 to the line 31 and power is supplied to the display drive circuit 280. Then, as shown in FIG. 3(1), by applying a voltage to the line 31, the transistor 2
14 is ONL, and line 32 indicates 1.1 when the ignition switch 5 is turned on, as shown in FIG. 3 (2). At “0”
” appears. This signal changes to circuit 2 for a certain period of time.
52. The constant time circuit 252 outputs a signal at time 1 to the output line 33 as shown in FIG. 3(3) due to a change in the level of the input signal. A signal that becomes "1" is generated from to time t2. This signal is input to the NOR gate 263,
A "0" signal shown in FIG. 3 (7) is generated on the output line 37. The "0" signal from this NOR gate 263 causes the time point 1. However, the inputs and outputs of switch circuits 232 and 242 are separated for a certain period of time at time t2.

On the other hand, the "1" signal on the line 33 is inverted to "0" by the invert gate 264 and input to the NOR gate 265. At this time, if the vehicle is not in reverse and the bank switch 4 is open, an "O" signal is applied to the other input of the NOR gate 265. Therefore, the output of NOR gate 265 is the same "1" as the signal on line 33.
A signal is generated. “1” from this time t1 to time t2
The ``signal is guided to the display drive circuit 280, which causes the ``field'' of the light emitting element 131 of the display 1 to light up.

On the other hand, “1” of the line 33 from the above-mentioned time point to the time point t2
"The signal is also led to the switch circuit 243, and its input and output are connected, so that the output signal of the time measurement circuit 241 (signal on lines 312, 322, 332) is connected to the output lines 310, 320 of the switch circuit 243. , 330. This time measurement circuit 241 uses the 7-segment display sections 111, 112, 113 of the display 1 to numerically display the elapsed time since the ignition switch 5 was turned off by the parking time measurement counter, that is, the parking time. ,'l
Line 312 is a signal that lights up L4, and line 3 is a signal that lights up dot display sections 121 and 122 indicating time units.
22 and 332.

Therefore, these signals appear at the output of the switch circuit 243 and are guided to the display drive circuit 280. Then, by the operation of the display drive circuit 280, for example, if the parking time is 3 hours and 48 minutes, the display 1 displays ``3:48'' to notify the driver of the parking time. That is,
Only the parking time is displayed for a predetermined time after the ignition switch 5 is turned on.

Then, when the ignition switch 5 is turned ON and reaches the time t2 after a certain period of time, the output signal of the circuit 252 becomes "0" for a certain period of time, so that the output signal of the circuit 252 becomes "0".

The output of the R gate 265 becomes a “0” signal, and the NOR
Since the output of the gate 263 becomes a "1" signal as shown in FIG. 3 (7), the input and output of the switch circuit 243 are separated, and the inputs and outputs of the switch circuits 232 and 242 are connected. That is, The output lines 311 and 310 of the time creation circuit 231 are connected to the output lines 321 and 3.
20, line 331 and line 330 are connected, and output line 341 and line 340 of time measurement circuit 241 are connected.
Line 351 and line 350 will be connected to each other. The time creation circuit 231 uses a signal from the oscillation circuit 220 to display the 7-segment display section 111 of the display 1 in order to display the current time numerically. ” 112. A signal to light up 113. 114 is on line 311, and dot display section 1 indicating the time unit.
Lines 321 and 331 send a signal that lights up lights 21 and 122.
It is output to.

Therefore, these signals are connected to lines 310 .
Appears at 320.330 and drives the display drive circuit 280,
For example, if the current time is 10:29, the display 1 displays rlo:29j to notify the driver of the current time. This time is sequentially displayed at each time by the operation of the time creation circuit 231.

On the other hand, since the two inputs of the NOR gate 262 both become "0" at the time t2, the output line 34 is as shown in FIG. 3(4).
As shown in the figure, a signal that rises to "1" appears at time t2. Then, the reset circuit 251 is connected to a NOR gate 262.
A short pulse signal is generated on line 35 as shown in FIG. 3(5) by the rising edge of the signal from . The counter for measuring parking time and the counter for measuring driving time in the time measuring circuit 241 are reset by this pulse signal.

The counter for measuring the operating time starts from the oscillator 220 from time t3.
Measure the pulse signal from the
Display device 10 light emitting elements 151, 12, 153, 154
A signal for sequentially lighting up the light emitting elements 161 is output to the output line 341, and a signal for lighting the light emitting elements 161 is output to the output line 351. These signals are routed through switch circuit 242 to line 3.
40 and 350, the display drive circuit 280 is driven by these signals, and the light emitting elements corresponding to each signal are turned on. For example, if the driving time is 1 hour and 30 minutes, the light emitting elements 151, 152, and 153 will light up to notify the driver of the driving time, and if the driving time is 2 hours or more, a signal will appear on the line 350. , the light-emitting element 161 indicating the rest pictogram lights up, and displays the driving time that is a guideline for the driver to exercise. Therefore, in this case, the current driving time is displayed on the display 1.

Next, when the driver moves the vehicle backward, that is, puts the change lever into the reverse gear at time t4 in FIG. 3, the bank switch 4 turns ON, and the inverter gate 2
A signal that becomes "1" appears on the output line 36 of 61 at time t4, as shown in FIG. 3 (6). Since this "1" signal causes the outputs of the NOR gates 263 and 265 to become 0" signals, the inputs and outputs of the switch circuits 232, 242, and 243 are separated, and the input and output of the switch circuit 272 are connected. That is, the output lines 313 and 310 that generate a signal that numerically displays the distance to the rear obstacle from the distance processing circuit TaI21' are outputs that generate a signal that displays the position of the obstacle on the vehicle. Lines 342 and 340 generate a signal to illuminate the distance unit. Output lines 361 and 360 generate a signal to indicate the decimal point. Output lines 333 and 330 generate a signal to indicate the decimal point.
are connected to output lines 371 and 370, respectively, which generate a signal indicating that an obstacle is in the danger area. The signal shown in FIG. 3(6) appearing on the line 36 is also led to the display drive circuit 280, and this signal causes the display 1 to
The vehicle pictogram 101 lights up to notify the driver that the vehicle has entered the obstacle detection operation.

Then, by operating the distance detector 3 and the distance processing circuit 271, the 7-segment display section 111, 112, 113, 1 of the display 1 displays a number according to the distance to the nearest obstacle.
14 is output on line 313. Therefore, the display device 1 can be displayed at a distance of, for example, 2 m to an obstacle.
If it is 50 cm, it will be displayed as r2.50mJ. Also,
Light-emitting element 1 indicates in which area behind the vehicle the obstacle is located.
51°152.15'3 and 154 are turned on to notify the driver. When the vehicle continues backing up and the distance to the obstacle enters the danger zone, the light emitting element 171.17
2 is lit, and rsTOPJ 173 is lit to notify the driver that it is dangerous to back up any further. Even when the vehicle is backing up, the above-mentioned time 1y generation circuit 2
31 and time measurement circuit 241 are in operation, and when the vehicle is returned to the forward state at time t5 in FIG. 3, the input and output of switch circuits 232 and 242 are connected as described above, and the time and The elapsed driving time up to now is displayed by each of the above-mentioned light emitting elements.

Next, suppose that the driver turns off the ignition switch 5 in order to get out of the vehicle (this time is at time t6 in FIG. 3).
However, since no voltage appears on the line 31 and no power is supplied to the display drive circuit 280, all the light emitting elements of the display 1 do not light up (although the other circuits are still operating. The time measurement circuit 241 is the reset circuit 2
51 receives a pulse signal at time t6 as shown in FIG. A time signal from when the ignition switch 5 was turned off is generated by measuring the signal from the ignition switch 5. After this, ignition switch 5
When turned ON, the time elapsed since the 01'' F is displayed on the display 'al' by the operation described above.

Note that the number of light-emitting elements such as vehicle pictures and body rest pictures in the first embodiment is not limited to these; for example, the number of light-emitting elements used to display the elapsed driving time is four in this embodiment, but there are at most four light-emitting elements. good.

Further, in the above embodiment, the ignition switch 5 and the signal entering the reverse gear are used as the automatically switching signals, but a vehicle speed signal or the like may be used in addition to this. That is, even if the driving time measurement display is performed after the ignition switch 5 is turned on and the predetermined speed has been reached, and when the vehicle is reversing, the rear obstacle display is performed only when the reversing vehicle speed is less than the predetermined speed. good. Further, regarding the driving time hand side, measurement may be started immediately after the ignition switch 5 is turned on.

Further, the rear obstacle detection may be performed in conjunction with the ON bank switch so that it is performed only when the vehicle is moving backward.

Furthermore, in the rear obstacle display using the light emitting elements 151 to 154, the detected position of the nearest obstacle is displayed, but when it is detected that an obstacle exists within a predetermined distance for each area, other obstacles are displayed. A light emitting element corresponding to the light emitting element may be turned on independently of the light emitting element.

Further, although the above embodiment uses ultrasonic waves to detect rear obstacles, electromagnetic waves, light, etc. may also be used.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, FIG. 2 is a detailed electrical connection diagram of the configuration shown in FIG. 1, and FIG. 3 is a signal waveform diagram for explaining the operation. DESCRIPTION OF SYMBOLS 1... Display device, 2... Control circuit part, 3... Distance detector, 4... Basokusui nochi, 5... Ignition switch, 241... Time measurement circuit, 271...
・Distance processing circuit, 232.242', 243,272・
...Switch circuit. Representative Patent Attorney Takashi Okabe

Claims (1)

[Claims] An obstacle that detects the presence of an obstacle in each of a plurality of regions where the rear region of the vehicle is divided and generates a first visual signal that displays the presence of the obstacle corresponding to the detected region. a detection means; a reversing detection means for detecting when the automobile is reversing; and a driving time measuring means for measuring the driving time of the automobile and generating a second display signal for displaying the elapsed time step by step every time a predetermined period of time elapses. means, a display means provided in the vehicle interior and displaying rear obstacles or driving time by arranging in a predetermined direction a number of display elements equal to at least the rear area of the vehicle; and a second display element from the driving time measuring means. A typical signal is applied to the display means to display a number of display elements corresponding to the driving time of the automobile, and when the reversing detection means detects that the vehicle is reversing, a signal from the obstacle detection means is applied. A display device for an automobile comprising a switching means for applying a first surface signal to the display means instead of the second surface signal to activate a display element at a position corresponding to an area where an obstacle is present.