JPS5985590A - Operator for 2-wire transmission type display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an operating device for a display device that can be used, for example, to indicate the arrival and departure of employees in government offices, companies, etc., or to display inventory of products, and in particular, to setting addresses to be assigned to the operating device. The purpose of this invention is to provide an operating device that can be easily operated.

<Description of Prior Art> The present applicant has proposed a two-wire display device in [Japanese Patent Application No. 56-116848-Yumi].

The outline of this two-line display device will be explained using FIGS. 1 and 2. 101 shown in FIG. 1 is a display device. The display device 101 has, for example, a plurality of display windows 102, in which, for example, the name of an employee is written, and by lighting up a light source provided behind it, it is displayed that the employee is at work, The lights shall be turned off to indicate that the employee has left the office.

Reference numerals 103 and 104 indicate operating devices for operating the status 102 of the display 101 to display states for coming to work and leaving work. The operating device 103 is for a private room and is assigned to one employee. Reference numeral 104 indicates an operating device that is shared by a plurality of employees. Each of the operating devices 103 and 104 is provided with a push button switch 105 and a light emitting element 106 for monitoring corresponding to each push button switch 105. When the push button switch 105 is pressed down, the display state of the display window 102 of the display device 101 is changed. Invert. In other words, for example, when the push button switch 105 is pressed while going to work, the push button switch 10
The child 106 of the display device 101 corresponding to 5 lights up when the window 102 of the display device 101 is displaying the work attendance status, and even if the display device 101 is not visible, it is possible to monitor the work attendance status and the work leaving status. It has a structure.

Reference numeral 107 indicates a reference signal generator for operating the display 101 and the operating devices 103 and 104 in synchronization. These display device 101, operating devices 103, 104, base single signal generator 1
07 are mutually coupled to a two-wire transmission line 108, and the display state of the display 101 is controlled via this two-wire transmission line 108.

The state of this control will be explained using FIG. 2. The reference signal generator 107 outputs Rockhals P 1 -P 64 as shown in FIG. 2, for example. Clock pulse P l
-P 64 is one cycle, 2640 is followed by a pause period To of 2 pulses, and this pause period To allows the display 101 to
The operating devices 103 and 104 detect the cycle, and the display device 1o1 and the operating devices 103 and 1.04 are configured to operate in synchronization with each other. .

Here, the clock pulses P1 to Pa4 are used as addresses assigned to each employee. In other words, addresses are specified by clock pulses P1 to Pe4 to each operating device 103, 104, and the area immediately after each clock pulse is divided into three, for example, and the three divided areas are used to transmit the arrival, departure, and display change control signals. do.

In this way, when transmitting control signals corresponding to a plurality of display windows using the two-wire transmission path 108, the operating devices 103, 1
04 and the display 101 must be used in a time-sharing manner. Therefore, an address is designated to each pushbutton switch 105 of each operating device 103 and 104, and the operating device operates to transmit an operating signal when it detects that its turn has come.

Each operating device 103, 104 is provided with means for detecting the address assigned to itself, and means for transmitting an operation signal when its own address is specified by the address detecting means.

In the operating device of the two-wire display device that was previously filed, the address detection means and the means for transmitting the operation signal are constructed as shown in FIG. 3.

In FIG. 3, 301 counters 302 and 303 are multiplexers, and 304 is a matrix circuit. The power converter 301 counts all the clock pulses P1 to Pa4 sent through the two-wire transmission line [08], controls the multiplexer 303 by the counting output of the higher digits, and controls the Yi group Yo-Y7 of the matrix circuit 304. scan. Further, the multiplexer 302 is controlled by the count output of the lower digit of the counter 301, and the X-ray group X o -X 1s is scanned. Every time the X&I group X o -X+s is scanned one time, the selection of the Y line groups YO to Y7 is incremented by one.

An operation switch 305 is connected to each intersection of the X-line and Y-line of the matrix circuit 304. Shown in Figure 1.

In the case of a shared type controller 104, a 7-trix circuit 30 is used.
A switch 305 is connected to each intersection of 4.

Further, in the case of the operating device 103 for a private room, a switch 305 is connected to the intersection point of the position corresponding to the address assigned to the operating device 103.

<Disadvantages of the Prior Art> As described above, in the conventional art, the combination of the multiplexers 302, 303 and the 7-trace circuit 304 constitutes a means for detecting the own 7-trace and outputting an operation signal at this address position. Therefore, for example, in the case of a controller for a private room, if the employee who uses the private room changes, the address of the controller for that room must be changed to the address of the next employee to use the room. In such a case, it is necessary to change the position of the operation switch 305 on the matrix circuit 304 in the conventional operation device. One way to deal with employee transfers without changing the connection position of the operation switch 305 is to change the company name displayed on the window of the display 101.

However, both the work of changing the connection position of the operation switch 305 and the work of changing the employee name on the display are troublesome because one or the other of these work must be done every time an employee is transferred.

<Object of the Invention> The present invention aims to provide an operating device that allows the address assigned to the operating device to be easily changed.

<Summary of the Invention> In the present invention, an address signal is generated that is the same as the clock pulses P1 to P64 sent from a reference signal generator, and the address position number and the address set by a digital switch are compared with each other using a digital switch. , - When detecting a match, the state of the operating switch is taken into the memory, and the state of the operating switch taken into the memory is transferred through the two-wire transmission line Is.

Therefore, according to the present invention, in order to change the address assigned to each operating device, it is sufficient to create a digital switch 1t'ψ, and the address can be changed 1-1 to 1γB]4j-.

<Embodiment of the Invention> FIG. 4 shows a practical example of the operating device according to the present invention. In the figure, 401 does not indicate a controller, and (?li controller 401 is C
PU 402, ROM 403, RAM 4 (14), input port 405, output ports 1 and 40 (5), generally called a microcomputer, is composed of a set of 4 units/1 circuit.

The controller 401 takes in clock pulses P+-P64 sent through the two-wire transmission line 108 from the input capo-+-406 via the receiving circuit 407, counts the clock pulses Pl-P64, and stores the count in the RAM 404. Capture numbers. Transmission path 1 is determined by the count value taken into RAM404.
Recognize the address position on 08.

CPU 402 outputs an address scanning signal from output port 406 at a repetition frequency that is about 100 to 1000 times faster than the repetition frequency of clock pulses P1 to P64.

The address scanning signal outputted to the output terminal Do-D8 of the output port 406 is composed of upper bits, and this address signal is referred to as an upper address scanning signal A. The address scanning signal outputted to the output terminals Fo-F'3 and Go to G8 is composed of lower bits, and this address scanning signal will be referred to as a lower address scanning signal B.

” In this example, the 7th position address signal A is a 4-bit binary coded 1.
The case of outputting in decimal code is shown. This upper address scanning signal A is supplied to one input terminal of the address comparator 411. The other input terminal of the address comparator 411 is connected to an upper address setting means 412 constituted by a total switch, and the upper address setting means 412 sets a digital value C corresponding to the upper bit of the address to be assigned to the operation switch 410. Set.

The address comparator 411 compares the upper address scanning signal A and the value C set in the digital switch 412, and A=
C is detected, and the switch element 413 is controlled to be turned on while A=C.

A transistor can be used as the switch element 413. The emitter of this transistor is connected to a common potential and the collector is operated by a switch 4 J, 0 and a resistor 4.
14 to the positive voltage terminal. This series circuit of the switch element 413, the resistor 414, and the operation switch 410 ensures that the upper address scanning signal A and the set value C of the first address setting means 412 are in the state of A=C, and that An AND circuit 415 is configured to determine that switch 4]0 is not being operated. .

416 indicates lower address setting means. This lower address setting means 416 can also be constructed by a tintal switch. The set value of this lower address setting means 416 is given to a telecoder 417 and a multiplexer 418.

The tecoder 417 outputs a signal E from the AND circuit 415 indicating that the conditions of A=C and that the operation switch 410 is being operated are met, and this signal E is applied to the input terminal X. When the logical signal E applied to the input terminal

In other words, if IQ, 1, and OJ corresponding to the decimal number 2 are set in the lower address setting means 416, the output terminal S
2, a signal obtained by inverting the polarity of the logic signal E applied to the input terminal X is output. Therefore, in this case, output terminals S1 to S8
An 8-bit lower address signal F of "ro, 1, 0, 0, . . . 0" is output.

The lower address signal F is sent to the CPU via the input port 405.
402 and the RAM 404 via the CPU 402.
written to. The lower address signal that is written in RAM 4.04 performs an operation to invert all the data in the area where this lower address signal was previously written. For example, multiplexer 417 to r1. o, o, o,...
・If ``0'' is output and this 8-bit second address signal F was previously stored in the specified area of the RAM 404, the next time the signal F is input, all the memories in this area are inverted. , 1, 1, 1. . . . 1" 3. With this reversal operation, each time the operation switch 410 is pressed, it is stored in the RAM 4.04 as data for coming to work and leaving the office.

The arrival and departure data stored in the RAM 4 (14) are stored in a time series corresponding to the clocks P1 to Pa4 flowing through the two-wire transmission line 108 by a combination of the upper address signal A and the lower address signal F stored as this data. The address is converted into an address by a program, and at that address position, the output (1)l path 422 is output to the two-wire transmission line 108. In the above example, the upper address signal A is 4 bits of binary coded decimal code, and the lower address signal F is 8 bits of decimal code, so 4 bits of 2
The evolved decimal code can represent 16 numbers. Therefore, in this example, up to 16×8=128 addresses can be controlled. When controlling up to 128 addresses, the clock pulses are P1 to P128, and the window of the display 101 is 1.
It can be controlled with 28 pieces.

421 indicates a monitor light emitting element. This monitor light emitting element 421 is controlled so as to display a coming-to-work display in a window corresponding to the operation switch 410 of the display 101 and to turn on at the beginning. This control is performed as follows. RAM40
The arrival and departure data memorized in 4 is displayed.-1-4,06
The signal is output from the output terminals Fo-Fs and G o ''-G3.

Now, if "0, 1, OJ" is set in the lower address setting means 416, the lower address signal F is "o, 1.o.
,...0". This lower address signal F'lJ
``lR, When stored in AM404, the data that has already been written is ro, 1.'o, which represents leaving the company data, for example.
, o, ...'', the polarity is reversed and the attendance data r1. , 0, 1, 1, 1...1". Therefore, at this time, output terminals FO to F8 and Qo-
From GB, attendance data r ], , 0 , 1 , 1
, .

Control terminals A, , B, C of multiplexer 418
Since [0, 1, 0] are supplied from the lower address setting means 416, the logic signal "0" which is sensed at the second input terminal T2 is outputted to the output terminal Z. This output terminal turns on the transistor 419, and the upper address signal A changes to the setting value C of the upper address setting means 412.
The light-emitting diode 421 is turned on every time it matches the .

The repetition frequency of the upper address No. 07A is about 100 to 1000 times faster than the frequency of the clock pulse flowing through the transmission line 108, so the light emission from the light emitting element 421 is stopped and the clock is ready to go to work. Display.

When the attendance status is displayed, if the operation switch 41O is pressed down, the data rJ bar in the RAM 404 is reversed and the data is changed to "o, 1. o, o, o, o, ... OJ is reached. This take is Output terminal FO~F 3.G o -G 3
Therefore, the input terminal T2 of the multiplexer 418 is given a logic "1", so the output of the output terminal Z is a logic "1", the transistor 419 is turned off, the light emitting element 421 is turned off, and the user leaves the office. It will be in display state.

<Effects of the Invention> - As mentioned above, according to this invention, since the address of each controller is set using two digital switches, the address can be easily changed. . Therefore, even if there is a change in the employee name assigned to the operating device due to a personnel change, the change can be easily dealt with, and an easy-to-handle work attendance/leaving display can be provided.

Even when used as a small inventory management device, there is an advantage that the correspondence between product names and operation buttons can be easily changed.

[Brief explanation of drawings]

Figure 1 is a block diagram to explain the outline of a conventional two-wire transmission type display device, Figure 2 is a waveform diagram to explain its operation, and Figure 3 is an operating device used in the conventional device. FIG. 4 is a block diagram showing an embodiment of the present invention. 101: Display device, 102: Display device, 103, ]04
: Operating device, 107: Reference signal generator, 401: Controller,
402: CPLJ, 403: ROM. 404: RAM, 405: Input port, 406: Output port, 410: Operation switch, 411: Comparator, 4
12: Upper address setter, 415: AND circuit, 41
6: Lower address setter, 417: Tecoder', 4]
8: Multiplexer. Patent applicant: T, I, Hui Co., Ltd. / Citizen agent: Haya Junno

Claims (1)

[Claims] (1) A. Address signal generation means that generates upper and lower address signals in synchronization with the reference clock pulse output from the reference signal generator, and B. Upper address setting switch that sets the upper address assigned to itself. and a lower address setting switch for setting the lower address assigned to the C8 itself; (2) Compare the upper address signal output from the address signal generating means with the setting value of the upper address setting switch; A comparator that detects a match, an operation switch that changes the state of the E1 display, and F, a logic that detects that this operation switch has been operated and that the above upper address signal and the above set value match. a product circuit, G, a decoder that inputs the lower address area set by the lower address setting switch when the operation switch is operated by this AND circuit; H8 a lower address signal output from this decoder; A memory that stores data indicating that the operation switch has been operated at an address determined by a combination of the upper address signal and the upper address signal; an operating device for a two-wire transmission type display device, comprising means for transmitting data in its own address area.