JPS5930933Y2 - Vehicle display display position selection device - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to a display conversion device for a destination display on a train or bus, and is intended to simplify the configuration and reduce costs.

Such a conventional display conversion device assigns a different code to each display frame on which a destination name is displayed, respectively, and detects the code using a positioning detector to drive a motor for driving the display curtain. It is designed to select and display the required display frame.

However, in this display conversion device, to configure the position detector, it is necessary to provide signal lines equal to the number of display frames on which the destination name is displayed, and it is also necessary to detect the curtain feed pulse signal. The system itself was a big loss and complicated, and not only was it expensive, but it also had a high risk of malfunction depending on its complexity and was unreliable.

This idea was made in view of the above-mentioned drawbacks of the conventional technology.
It is an object of the present invention to provide an inexpensive and highly reliable display conversion device for a vehicle display device that can reliably control the conversion of a display section such as a display curtain using one signal line.

Hereinafter, embodiments of this invention will be explained in detail based on the drawings.

In the figure, 1 and 2 are digital switches for setting the target destination name, and are used to set numerical values corresponding to the display pieces of the display curtain, etc. on the destination display, and one of the digital switches The digital switch 2 has the function of setting the first-place number with 1 and the tenth-place number with the other digital switch 2 in IO base, and outputting the electric signal in binary coded decimal code.

3.4 shows a semiconductor memory consisting of a shift register for storing input signals from both digital switches 1.2;
- It is composed of a semiconductor integrated circuit with an MO8 structure and can hold data as long as power is supplied, so it acts as a memory.
'Ix, but it is a clock synchronized shift register that does not operate unless it is input to the clock terminal ck.

5.6 is an up/down counter that adds or subtracts input pulses to the up terminal U or down terminal and outputs the count as a signal in binary coded decimal code, and both counters 5 and 6 are connected in relation to each other. , the number of currents in the counter 5 that counts the number in the 1st place is carried up to the counter 6 that counts the number in the 10th place.

Both counters 5 and 6 are constructed of semiconductor integrated circuits like the semiconductor memories 3 and 4, and can hold the count as long as power is supplied, so they also function as memories.

7.8 is the set value of semiconductor memory 3, 4 and counter 5, 6
shows a comparator that compares each of the two systems of binary coded decimal data with the count value of
The first output terminal 01 of the comparator 8 for comparing the numbers in the 10th place. Three types of signals are output from the second output terminal 02 and the third output terminal 03, respectively.

Here, a comparator 7 for comparing the numbers in the first place is connected to the comparator 8, and if the comparison results of the comparator 8 are not equivalent, regardless of the output of the comparator 1, the second dimension or the third dimension is connected. If the comparison result of the comparator 8 is equivalent, the signal is output from any of the output terminals 01, 02.03 of the comparator 8 according to the comparison result of the comparator 7. It is now output.

The second . Third output terminal 02.03 is connected to forward rotation relay 11 and reverse rotation relay 12 via switching transistors 9 and 10, respectively.

13.14 is a normally open contact and a normally closed contact of the relay 11 for forward rotation, and 15.16 is a normally open contact and a normally closed contact of the relay 12 for reverse rotation, and each contact 13 to 16tj drives the display part of the display. The motor 1γ is connected so that current flows in opposite directions when the forward rotation relay 11 is energized and when the reverse rotation relay 12 is energized.

Reference numeral 17 denotes a detection contact that is turned on each time the display changes one stage when the display section of the display device is driven. It is driven by detection through detection holes drilled in each display frame.

A signal □ generation relay 18 is connected in series to this detection circumference A17, and the = end of the contact 19 of this relay 18 is connected to the power supply section B, and the The second input terminal of each of the two Nant gates 20 and 21 is connected to the second input terminal of the comparator 8. Since they are connected to the third output terminals 02 and 03, either the up terminal U or the down terminal of the counter 5 is selected by the output signal of the comparator 8, and the detection contact 17 is driven. r/cf so that the pulse signal generated by
I have X.

22 is a setting switch for adding data set by the digital switch 1.2 to the semiconductor memories 3 and 4, both ends of which are connected to the power supply section B and one input terminal of the Nant gate 23; The other input terminal of the Nant gate 23 is connected to the first output terminal 01 of the comparator 8, and the output terminal is connected to each clock terminal ck of the bidirectional conductor memories 3 and 4 via the inverter 24. The set values of the digital switches 1 and 2 are loaded into the semiconductor memories 3 and 4 only when the setting switch 22 is turned on while an equivalent signal is being output from the first output terminal 01 of the comparator 8. .

25 is a power supply unit B, semiconductor memories 3 and 4, and a counter 5;
．． This is a reset switch inserted and connected between each of the reset terminals R of 6.

Next, in the power supply section shown at the lower left, 26 is a power input terminal that is supplied with power from another main power source such as a vehicle to which the display conversion device of this invention is applied.
6 to Zener diode 21 and electrolytic capacitor 2
A power supply main output terminal 29 is led out from the power supply main output terminal 29 through a stabilizing circuit formed from the main power supply output terminal 8, and the semiconductor memory 3,
4 and the circuit elements other than the counters 5 and 6, and a memory retention power source 30 consisting of a battery and a switch 31 for disconnecting the power source are connected in series □ between the power input terminals 26. The + side of the series circuit is led out as a power supply sub-output terminal 32, and the semiconductor memories 3, 4 and counters 5, 6rc are always energized from this power supply sub-output terminal 32, whereby the semiconductor memories 3, 4' are connected to the digital switch 1.2. The set value is stored, and the counters 5 and 6 always store the count value.

In this case, the semiconductor memories 3 and 4 and the counters 5 and 6 are constructed of semiconductor integrated circuits of the KC-MO8 structure as described above, and can hold data contents with extremely low power consumption.

Furthermore, an electrolytic capacitor 33 and a resistor 34 are connected in series across the series circuit of the switch 31 and the power supply 30, and the connection point is connected to the reset terminal R of each of the counters 5, 6 and the semiconductor memory 3.4. .

Next, the operation of the embodiment will be explained in detail.

First, the cut-off switch 31 is a normally closed switch for releasing the power supply 30 during maintenance and inspection.
Power is supplied from 0 to semiconductor memories 3 and 4 and counters 5 and 6 to store data contents.

When the disconnection switch 31 is turned off for maintenance and inspection at a meeting and then turned on afterwards,
The semiconductor memories 3 and 4 and the counter 5. At the same time, the reset terminals RK of the semiconductor memories 3 and 4 and the counters 5 and 6 are energized from the power supply 30 to reset them.

Next, the main power of the vehicle, etc. is supplied from the power supply main output terminal 29, and the digital switches 1 and 2 are operated to
[Suppose it is set.

When the setting switch 22 is pressed and then immediately released, one pulse signal is generated.

At this time, since the semiconductor memories 3 and 4 and the counters 5 and 6 have been reset as described above and both outputs are zero, both equal signals are output from the first output terminal 01 of the comparator 8. .

Therefore, when the clock terminal ckK pulse signal of the semiconductor memories 3 and 4 is input, the numerical value "13" set by the digital switch 1.2 is stored in the semiconductor memory 3.4.

When the numerical values are stored in the semiconductor memories 3 and 4, the counter 5
, 6 is "0", it is output from the second output terminal 02 of the comparator 8, the forward rotation relay 11 is attracted, its normally open contact 13 is closed, and its normally closed contact 14 is opened. , a current flows through the motor M in the direction of arrow A, causing the motor M to rotate forward, and the display section to move in the forward direction.

When the display unit is driven, detection contact 1 is activated each time the display frame changes.
1 is turned on and the signal generating relay 18 is attracted.

Therefore, the contact 19 of the relay 18 repeatedly turns on and off every time the display frame changes.

The pulse signal generated thereby is inputted to the up terminal U of the counter 5 by the output signal from the second output terminal 02 of the comparator 8, and is counted up by the counters 5 and 6.

One rc pulse signal is input every time the display piece changes, and one
Up-counting continues when the pulse signal is input three times.

When the count values of the counters 5 and 6 reach r13J and match the set values stored in the semiconductor memories 3 and 4, the output of the comparator 8 is transferred from the second output terminal O2 to the first output terminal 01.
, the forward rotation relay 11 is no longer supplied with power, its normally open contact 13 is opened, and its normally closed contact 14 is closed, so power is no longer supplied to the forward rotation relay 11 and the drive of the display section stops, and the display frame of the display shows " The contents of the display frame corresponding to "13" are displayed.

Next, depending on the operating route of the bus, etc., select the digital switch 1.
When r i OJrc is set to 2 and the setting switch 22 is momentarily turned on, r13 is set in the semiconductor memories 3 and 4.
The value of J is deleted and the value of rlOJ is newly stored.

Since this set value "10" is smaller than the numerical value "13" stored in the counters 5 and 6rc, it is output from the third output terminal 03 of the comparator 8, and the reversing relay 12 is attracted, and its normally open contact 15 Since the force is applied and the normally closed contact 16 is opened, a current flows in the direction of the arrow in the motor MKIriB, causing the motor M to reverse, and the display section to move in the opposite direction.

When the display unit is driven, the contact 19 is turned on and off every time the display frame changes, as described above, and a pulse signal is generated. It is input to the down terminals 5 and 6 and counted down by the counter 5.6.

Each time the display frame changes one stage, the count value is subtracted, and when three pulses are subtracted, the output of the comparator 8 is transferred from the third output terminal 03 to the first output terminal 01, and the drive of the display section is stopped. be done.

By the way, 1 go set from "13" to "10" mentioned above,
Assume that immediately after you set digital switches 1 and 2 to "11" by mistake and pressed setting switch 22, you realized your mistake, set digital switch 1゜2 to rlOJK, and pressed setting switch 22 again. 1 display section is driven and the display frame corresponding to "11" is selected, and unless both signals are outputted from the first output terminal 01 of the comparator 8, even if the setting switch 22 is pressed, the semiconductor memory 3, 4
The clock terminal ckK signal is not input, and the reset "1"
The numerical value "0" is not stored in the semiconductor memories 3 and 4, and this is designed to prevent malfunctions.

In the above embodiment, rOJ ~ "99" is expressed as two decimal digits.
Although the explanation is based on setting up to
Of course, the display position of rOJ to "999J" can be set as three digits in decimal.

As described above, according to the display conversion device for a vehicle display of this invention, power is constantly supplied to the semiconductor memory button that stores the set value and the counter that counts the detection pulse of the display change. In addition to storing the numbers and count values, the set value and count value are compared, and the rotation direction and stop of the motor is controlled based on the comparison results. It has the great advantage of being able to control reliably by simply detecting the signal, greatly simplifying the configuration, and significantly reducing costs.

BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a wiring diagram of an embodiment of the display conversion device for a vehicle display according to the present invention. 3.4... Semiconductor memory, 5,6...
Counter, 1.8... Comparator, 30...
・Memory retention power supply, M...motor

Claims (1)

[Scope of utility model registration request] A display for a vehicle in which a display part in which a destination name, etc. is written on a large number of consecutive display pieces, is moved in the correct direction or in the opposite direction by forward or reverse rotation of a motor, and is stopped after selecting a desired display piece. A display conversion device for a device includes a semiconductor memory that stores a new numerical value corresponding to each display frame every time the value is set, and a detection signal that is output every time the display frame is changed when the display section is moved. a comparator that compares a set value of the semiconductor memory with a count value of the counter; and a memory retention power supply that constantly supplies power to the semiconductor memory and the counter even when the main power is cut off, A display conversion device for a vehicle display, characterized in that the rotation and rotation direction of the motor and the counting direction of addition and subtraction of the counter are controlled by an output signal of a comparator.