JP3126292B2 - How to set transponder code - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting a transponder code which has a built-in integrated circuit, is attached to a product, and outputs information on the type and price of the product.

[0002]

2. Description of the Related Art As described in Japanese Patent Application Laid-Open No. Sho 62-40833, a conventional transponder code setting method uses an antenna coil to change stored information after manufacturing the transponder itself. Writing power is supplied by using electromagnetic coupling, and at the same time, a writing signal is transmitted and received. Hereinafter, a conventional transponder code setting method will be described with reference to FIGS. 3 and 4. FIG.

FIG. 3 is a circuit block diagram of a fixed machine A as a code setting means. 1 is a first antenna coil, 2 is a power supply unit, 3 is a receiving unit, 4 is a coupling circuit, 5 is an oscillation circuit,
6 is a code setting unit, 7 is a fixed machine modulation circuit, 8 is a fixed machine transmission amplifier circuit, 9 is a fixed machine reception amplifier circuit, 10
Is a demodulation circuit of a fixed machine, 11 is a serial-parallel conversion circuit, and 12 is a collation circuit. FIG. 4 is a circuit block diagram of the transponder B. 13 is a second antenna coil, 14 is a power supply unit, 15 is a code signal setting receiving unit, 16 is a transponder transmitting unit, 17 is a switching circuit, 18 is a switching circuit,
19 is a timing control circuit, 20 is an EPROM, 21 is a rectifier circuit, 22 is a capacitor, 23 is a transponder receiving amplifier circuit, 24 is a transponder demodulator circuit,
Reference numeral 5 denotes a transponder modulation circuit, and reference numeral 26 denotes a transponder transmission amplifier circuit.

Next, a conventional transponder code setting method will be described. In the setting section 6, when the setting content is input, the modulation circuit 7 modulates the carrier generated in the oscillation circuit 5, is amplified by the transmission amplifier circuit 8 of the fixed device, and is transmitted from the first antenna coil 1 via the coupling circuit 4. Transmitted as electromagnetic waves. In the transponder, this electromagnetic wave is received by the second antenna coil 13, and power is obtained by the rectifier circuit 21 and the capacitor 22 via the switching circuit 17. Next, when the timing control circuit operates, the receiving amplifying circuit 23 of the transponder and the demodulating circuit 24 of the transponder write to the EPROM 20.

Finally, the transponder code signal is transmitted by the transponder modulation circuit 25 and the transponder transmission amplifier circuit 26 for confirming the writing. On the fixed machine side, the confirmation of the writing of the code signal is completed by the receiving amplifier circuit 9 of the fixed machine, the demodulation circuit 10 of the transponder, the serial-parallel conversion circuit 11, and the verification circuit 12.

[0006]

However, the conventional transponder code setting method has a problem that a strong electromagnetic field is required because electromagnetic induction is used as a supply source of write power, and radio interference is likely to occur. For this reason, the writer requires components such as a radio wave shield.

[0007] As described above, an object of the present invention is to solve the problem that radio interference is likely to occur during writing and to reduce the radio interference during writing.

[0008]

According to the present invention, a signal modulated by a code signal for rewriting information stored in a transponder is received, and the information stored in the transponder is rewritten by the signal. In the transponder code setting method, the modulated signal is an optical signal, and a power source for generating a photoelectromotive force from the optical signal by a photoelectric effect element inside the transponder and rewriting the electromotive force with stored information of the transponder. And the received information received by the photoelectric effect element is demodulated to rewrite the stored information.

[0009]

According to the present invention, an optical signal is used as a signal modulated by a code signal for rewriting information stored in a transponder, and a photoelectromotive force is generated from the received optical signal by a photoelectric effect element inside the transponder. This electromotive force is used as a power source for rewriting information stored in the transponder. Further, the information stored in the transponder is rewritten by a signal obtained by demodulating the received signal received by the photoelectric effect element. Therefore, the problem is solved.

[0010]

FIG. 2 is a structural view showing an embodiment of the present invention. 2, reference numeral 200 denotes a photoelectric conversion element; 210, an integrated circuit that stores information, receives, demodulates, and analyzes a radio wave from an interrogator (not shown), and outputs the stored information;
20 is a receiving antenna for receiving radio waves from the interrogator, 230 is a packaging material cover for storing the internal components of the transponder, 240 is a packaging material substrate for storing the internal components of the transponder, and 250 is a target to which the transponder is attached. An adhesive material for sticking to an object (hereinafter, referred to as a sticking target) 260 is a tape (hereinafter, referred to as a tape base paper) used for convenience of transport and supply of the transponder when the transponder is manufactured. ), 26
Reference numeral 5 denotes a tape base roll for convenience in transporting and supplying a large number of transponders (hereinafter referred to as a transponder supply roll), 270 denotes a lens for condensing light beams, and 275 denotes a lens for emitting light beams. Light emitting diode,
280 is a functional part of the writing device, 285 is an input keyboard for inputting and setting a code, 290 is a guide roller for sticking the transponder to the sticking target, and 295 is a sticking target. In the present embodiment, the packaging material substrate 240, the tape base paper 260, the adhesive material 25
A light-transmitting material is used for 0 so that light rays pass through.

FIG. 1 is a block diagram of a writer and a transponder for explaining an embodiment of a transponder code setting method according to the present invention. 100 is a code input setting means for inputting a code, and 110 is a device for modulating an electric signal by the code, and a light emitting diode (hereinafter referred to as LE).
D), a signal modulation / LED driving means for driving
Reference numeral 20 denotes an LED that converts an electric signal into a light beam and emits the light beam.
Reference numeral 0 denotes a silicon solar cell that supplies power for writing to the transponder, receives a modulated light beam, and converts it into an electric signal (hereinafter, referred to as a reception signal). Reference numeral 140 denotes writing from the reception signal converted by the silicon solar cell 130. Power supply means 145 for generating and supplying power for the reception signal, a reception signal demodulation / code writing means 145 for demodulating a reception signal and writing a code in a code storage means such as a memory, and 150 for storing a transponder code. Code storage means comprising a memory of
0 is a code modulation oscillating means for generating an electromagnetic wave modulated by a code in response to a code transmission request from the interrogator, 170 is a power supply rectifying and smoothing means for generating a transponder power supply from the electromagnetic wave from the interrogator, and 180 is a , A transmitting / receiving antenna for emitting a code-modulated electromagnetic wave, a writer 190, and a transponder 195.

Next, one embodiment of the present invention will be described with reference to FIGS.
A transponder code setting method according to the embodiment will be described. First, the mechanical operation of the writer will be described with reference to FIG. First, a code to be written into the transponder is input from the input keyboard 285. In this embodiment, manual input is used, but a suitable input means such as communication may be used. The code is stored in the function part 280 of the writing device by the above setting. Thereafter, the transponder is attached to the attachment target to which the transponder is attached by a mechanism such as the guide roller 290.
At the time of pasting, by the mechanism of the writer (not shown),
Writing to the transponder is performed by the light emitting diode 27
5, through the lens 270. The transponder is a tape base paper 260 and a transponder supply roll 265.
, So that writing and pasting can be performed quickly and continuously.
The mechanical operation in such a series of pasting can be realized by a mechanism similar to a regular tag pasting apparatus used in a normal store.

The detailed operation performed by the functional unit 280 at the time of writing in the above mechanical operation will be described with reference to the block diagram of FIG. The code to be written is stored in the code input setting means 100. The signal modulation and
The LED driving means 110 operates to generate a driving signal modulated by the code. With this drive signal, the LED
Light rays are emitted from 120. The silicon solar cell 130 (200 in FIG. 2) formed on the back surface of the integrated circuit (210 in FIG. 2) of the transponder 195 generates an electromotive force from this light beam, and
0) The power supply for writing the transponder is supplied by the write power supply means 140 above. Since the electromotive force is a received signal and is modulated by a code, the code is stored in the code storage means 150 by the received signal demodulation / code writing means 145 on the integrated circuit (210 in FIG. 2). After the writing is completed in this way, the transponder sets the object 295 to be pasted.
Pasted in. As shown in FIG. 2, the solar cell 200 generally on the back surface of the integrated circuit 210 after the attachment is covered with the attachment object 295, which has an effect of preventing a code change due to rewriting.

Next, the operation of the transponder when the transponder is actually used will be described with reference to FIG. The transponder 195 transmits and receives an electromagnetic wave generated by an interrogator (not shown) to a transmitting / receiving antenna 180 (22 in FIG. 2).
0) and supplies power for transmission by the power supply rectifying / smoothing means 170. Code modulation oscillation means 16
0 generates an electromagnetic wave modulated based on the code stored in the code storage means 150,
(220 in FIG. 2).

In this case, a method of transmitting a write signal by a light beam modulated at the time of writing is employed.
It is also preferable that the light beam is used only for power supply, and the write signal is transmitted using the same electromagnetic wave transmission method as in the related art. According to such a method, a strong electromagnetic wave is not necessary to supply power at the time of writing, and a writing signal can be transmitted by a weak electromagnetic wave. Therefore, even if electromagnetic waves are used, it is not necessary to have a radio wave shield as a constituent element as in the related art. In addition, as in the case of the conventional transponder, the transponder itself can be inspected such as connection between the integrated circuit and the antenna and failure diagnosis of the antenna. However, in this case, there is a problem that the configuration of the writing device becomes complicated because power is supplied by light beams and transmission and reception are performed by electromagnetic waves.

In this embodiment, the photoelectric conversion element is preferably formed on the back surface of the integrated circuit. However, it is not always necessary to form the photoelectric conversion element integrally with the integrated circuit on the back surface, but may be formed on the front surface or as a separate chip. May be implemented. In this case,
This may be preferable in that rewriting to the transponder can be performed after the object is pasted on the object to be pasted. However, when the photoelectric conversion element is formed on the surface of the integrated circuit, the area of the integrated circuit increases and the cost increases. Further, when it is necessary to prevent writing after pasting on the object to be pasted, means for preventing rewriting is required. If the photoelectric conversion element is not formed integrally with the integrated circuit, the manufacturing process of the integrated circuit can be simplified and the area can be reduced, but there is a problem in cost and reliability because the number of components increases.

Further, in the writing device of the embodiment, the light emitting diode is used to emit light, but another light emitting method may be used according to the purpose. For example, it is preferable to use a laser diode, a strobe light, an incandescent lamp, or a fluorescent lamp according to the supplied power.

Further, it is preferable that writing on the transponder and printing on the transponder surface are simultaneously performed so that the information can be visually read.

[0019]

As described above in detail, according to the present invention, a signal modulated by a code signal for rewriting the information stored in the transponder is received, and the code setting of the transponder for rewriting the information stored in the transponder by the signal is performed. The method wherein the modulated signal is an optical signal, wherein a photoelectromotive force is generated from the optical signal by a photoelectric effect element inside a transponder, and the electromotive force is used as a power source for rewriting stored information of the transponder. Since it is configured to have means for demodulating a received signal received by the photoelectric effect element and rewriting the stored information, information can be written by an optical signal received by the photoelectric conversion element inside the transponder. Such radio interference does not occur. Further, since a photoelectromotive force due to the photoelectric effect is used as a power source for writing, a strong electromagnetic wave as in the related art is not required, and a radio wave shield is not required as a component of the writer.

[Brief description of the drawings]

FIG. 1 shows a transponder 19 and a writer 190 showing an embodiment of a code setting method for a transponder according to the present invention.
FIG. 5 is a block diagram showing an internal configuration of the fifth embodiment.

FIG. 2 is a structural diagram showing one embodiment of the present invention.

FIG. 3 is a block diagram of a fixed machine in a conventional transponder code setting method.

FIG. 4 is a block diagram of a transponder in a conventional transponder code setting method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 code input setting means 110 signal modulation / LED driving means 120 LED 130 silicon solar cell 140 writing power supply means 145 received signal demodulation / code writing means 150 code storage means 160 code modulation / oscillation means 170 power supply rectification / smoothing means 180 transmission / reception antenna 190 Writer 195 Transponder 200 Photoelectric conversion element 210 Integrated circuit 220 Receiving antenna 230 Packaging material cover 240 Packaging material substrate 250 Adhesive material 260 Tape base 270 Lens 275 Light emitting diode 285 Keyboard 290 Guide roller

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 1/59 G01S 13/78-13/80 H04B 5/00 H04B 7/24-7/26

Claims (1)

(57) [Claims] 1. A transponder code setting method for receiving a signal modulated by a code signal for rewriting stored information of a transponder and rewriting the stored information of the transponder by the signal, wherein the modulated signal is an optical signal. Generating a photoelectromotive force from the optical signal by a photoelectric effect element inside the transponder, using the electromotive force as a power source for rewriting stored information of the transponder, and demodulating a received signal received by the photoelectric effect element. A code setting method for a transponder, comprising: means for rewriting the stored information.