JPH0259516B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a wireless information display system, and its purpose is to centralize various information such as calls from customers in a restaurant, information on food completion from the kitchen, and presence information in an office on a receiving display unit. An object of the present invention is to provide an information display system that can be displayed and monitored, and can easily add or change locations for inputting information. The information display system of the present invention includes a plurality of individual transmitters that transmit a display set signal or a display reset signal whose carrier wave is modulated with a unique code by operating a display switch, and a plurality of individual transmitters that respectively correspond to each individual transmitter. It is equipped with a display device and identifies the individual transmitter that is transmitting the signal based on the unique code of the received display set signal or display reset signal, and sets or resets the display device corresponding to the individual transmitter to a predetermined state. A reception display unit is provided with a plurality of display inversion switches corresponding to each individual transmitter, and when the display inversion switch is operated, a display set signal that is substantially the same as the signal transmitted from each individual transmitter is generated. Alternatively, it may be composed of a centralized transmitting unit that transmits a display reset signal to set or reset each display. Examples will be described below using figures. FIGS. 1 to 6 show an embodiment of the present invention. In FIG. 1, 1 ₁ to 1 ₈ are individual oscillators that transmit a display set signal (described later) with a carrier wave modulated with a unique code. When setting the mode, _{VS (} which also serves as a reset signal) is transmitted by operating the display switch 2. Reference numeral 3 denotes a reception display unit, which includes a display unit 4 equipped with displays 5 ₁ to 5 ₈ corresponding to the individual transmitters 1 ₁ to 1 ₈ respectively, and a display unit 4 that displays the corresponding signals based on the unique code of the received display set signal _VS. Display set signal
A receiving unit 6 that identifies the individual transmitter (for example, 1 ₁ ) that is transmitting V _S and sets the display 5 ₁ corresponding to the individual transmitter 1 ₁ to a predetermined operating state (on or off). It consists of _Reference numeral 7 denotes a centralized transmission unit, which is equipped with display reversing switches _{31 1 to} 31 ₈ corresponding to the individual transmitters 1 ₁ to 1 ₈ , respectively. The display units ₅₁ to ₅₈ are reset by transmitting a display reset signal S _R that is substantially the same as the display set signal V _S transmitted from the display _{units 11} to ₁₈ (turns on → off,
The light turns off (turns on). The specific configuration and operation of each part will be described in detail below. Figure 2 shows a circuit diagram of the individual transmitters ₁₁ to ₁₈ , including a display switch 2 consisting of a push button switch provided on the top surface of the case, and a display switch 2 such as a pin board or multiple multi-contact switch. A unique code setting unit 10 formed of a material, a modulated wave generation circuit 11 formed of an arithmetic processing LSI such as a microcomputer, a reference clock generation crystal oscillator (3.57945MHz) 12, and a transistor _Q1. The carrier wave generation circuit 13 is formed of an oscillation circuit with an oscillation frequency of 260 MHz, and the modulation circuit 14 is formed of a transistor Q ₂ and is controlled by the output of the modulation wave generation circuit 11. In the figure, 15 is a DC power source such as a battery. Now, when the display switch 2 is turned on, power is supplied to each circuit and at the same time the modulated wave generation circuit 11 is turned on.
The timing output terminals T ₁ to _{T 6} of the clocks are provided with shift clocks S 1 to T ₆ formed based on the reference clock generated within the modulated wave generation circuit 11, as shown in FIG. 3a.
_S6 is output, and these shift clocks _S1 to _S6 are connected to predetermined input terminals set by the unique code setting section 10.
Input to I ₁ to _{I 4} . The modulated wave generation circuit 11 changes the number of frequency division stages of the reference clock appropriately depending on which of the input terminals I ₁ to _{I 4} the pulse is input to.
When a pulse is applied to the input terminals I ₁ , I ₂ , I ₃ , and I ₄ , the frequency of the output signals of f ₁ , f ₂ , f ₃ , and f ₄ is changed, respectively. is output to output terminal O. Therefore 6 switches SW ₁₁ to _{SW 16} with 4 contacts
In the embodiment in which the unique code setting section 10 is formed by the combination of four types of modulated waves _VC , which are six time-series combinations of four types of signals with different frequencies _f1 to _f4 , that is, a combination of signal frequencies. Unique code CD represented by
is now possible to occur. For example, switch
If SW ₁₁ to SW ₁₆ are as shown in Figure 2, the modulation wave V _C and unique code CD are as shown in Figure 3b.
become that way. By amplitude modulating the carrier wave generated by the carrier wave generation circuit 13 using this modulated wave V _C , a display set signal V _S is formed, and is transmitted from the antenna which is also used by the oscillation coil 13a of the carrier wave generation circuit 13. . FIG. 4 shows a block circuit diagram of the reception display unit 3. As mentioned above, the reception display unit 3 is composed of the reception unit 6 and the display unit 4, and the reception unit 6 is composed of, for example, two transistors. A front end 20 composed of a reproduction circuit, a gain amplifier 21 whose gain is set to about 80 dB, and four band-pass filter circuits 22 ₁ to 22 4 whose center frequencies are set to f ₁ to f _{4 ,} respectively.
and comparators 23 ₁ to 23 ₄ that determine the output levels of these filter circuits 22 ₁ to 22 ₄ , respectively.
and an arithmetic processing LSI like a microcomputer.
Detects the unique code CD of the display set signal V _S formed by the comparators 23 ₁ to 23 ₄ and received by the outputs of the comparators 23 1 to 23 4, and outputs a turn-off signal or a light-on signal for the indicators 5 ₁ to 5 ₅ based on the unique code CD. The code discriminating circuit 24 outputs the code. 2 in the diagram
5 is an acoustic notification section. On the other hand, the display unit 4 includes a unit code setting circuit 26 consisting of code setting switches SW ₂₁ to _{SW 24} consisting of four slide switches having four contacts, a latch circuit 27 that latches the output of the code discrimination circuit 24, and a mode switch. A mode change circuit 28 that sets the display mode with SW ₃ , a display drive circuit 29, and indicators ₅₁ to ₅₅ each consisting of an incandescent lamp provided corresponding to each individual transmitter ₁₁ to ₁₈ . It is configured. A plurality of display units 4 can be provided for one receiving unit 6 as shown by imaginary lines in FIG. 1, and in the embodiment, a unique code shown in FIG.
The 2nd to 5th bits of CD are used as a unit code for selecting the display unit 4, and the 1st and 6th bits are used as a display code for selectively controlling the displays ₅₁ to ₅₈ in one display unit 4. Therefore, a maximum of ⁴⁴ = 256 display units 4 can be provided, and information input from 256 x 8 = 2048 individual transmitters can be transmitted to the display 5 of each display unit 4.
₁ to 5 _{and 8} can be displayed in a concentrated manner. Now, for example, from the individual oscillator 1 ₁ (F ₁ , F ₁ ,
When the display set signal V _S modulated with the unique code CD of F ₂ , F ₃ , F ₄ , F ₁ ) is transmitted, the outputs of the comparators 23 ₁ to 23 ₄ are (23 ₁ ), (23 ₁ ), (23 ₂ ),
(23 ₃ ), (23 ₄ ), and (23 ₁ ) are produced in the order, and the outputs of the comparators 23 ₁ to 23 ₄ , including the output order, are temporarily stored in the internal memory of the code discrimination circuit 24. The code discrimination circuit 24 determines that the first and last input data are display codes, and the second to fifth input data are unit codes, and these unit codes and the unit code setting circuit 26 of the display unit 4 are output. If they match, the display 5 of the display unit 4 will be set based on the display code.
Selectively set to ₁ . Here, the relationship between the first and sixth bits of the display code, that is, the unique code CD, and the displays 5 ₁ to 5 ₈ is as shown in the table below (Table 1), for example. However, the center column shows the display code as a binary code.

【table】

【table】

Claims (1)

[Scope of Claims] 1. A plurality of individual oscillators that transmit display set signals or display reset signals whose carrier waves are modulated with a unique code by operating a display switch, and a plurality of displays that respectively correspond to each individual oscillator. Based on the unique code of the received display set signal or display reset signal, the individual transmitter that is transmitting the signal is identified, and the display corresponding to the individual transmitter is set or reset to a predetermined state. The receiver is equipped with a reception display unit configured as shown in FIG. An information display system comprising a centralized transmission unit configured to transmit a display reset signal to set or reset each display unit. 2. A receiving display unit is formed by a plurality of display units each having a plurality of display windows, and an individual transmitter can be used for each display window, and a centralized transmitter unit can be used for each display unit. An information display system according to claim 1, characterized in that: