JPH10149416A - Data carrier and data reader therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a display function itself as a memory without using a semiconductor memory by providing a read means for treading numeric information which is set by reading five segments in a P-shape part among seven segments in a numeric value display part. SOLUTION: The numeric value display part 2 of a data carrier 1 displays the arbitrary numeric value which is set by seven segments. The read means respectively reads at least five segments in a P-shape part among the seven segments of the numeric value display part 2. Namely, the numeric value display part 2 identifies the numeric value which is set in accordance with the display state of the P-shape five segment among the squarish 8-shaped segments for respective digits. Thus, the read means reads the five segment data. The read means is constituted of an IC chips 5 and a resonance circuit and the resonance circuit is constituted of an antenna coil 6 and a capacitor 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention can display numerical values and the like,
The present invention relates to a data carrier capable of holding data and a data reading device for reading data from the data carrier.

[0002]

2. Description of the Related Art Conventionally, an identification system for identifying an article or the like comprises a data carrier for holding data and a write / read control unit for writing or reading data in a non-contact manner. Thus, an identification system is configured. Writing data on such a data carrier /
To check without using the read control unit,
It is conceivable to provide a display function such as a liquid crystal on the data carrier to display the contents of the memory. It is also conceivable to use a rewritable thermosensitive data carrier that can be rewritten several hundred times and display the contents of the memory on a thermosensitive paper.

[0003]

However, when an identification system or the like is configured using a data carrier, the data needs to be written only once, and thereafter, the data is repeatedly read, which is a so-called WORM type (write once). rea
d many) Data carriers are often required. For example, when a data carrier is used instead of a slip in a distribution system or the like, data such as a destination is input only once, and thereafter, the destination is used for sorting and delivering while checking the destination a plurality of times in a distribution route. In this case, it is necessary to significantly reduce the cost of the data carrier rather than being able to use it repeatedly. That is, a data carrier using a liquid crystal display device cannot reduce the price, requires a power supply for display, has low flexibility, and is difficult to use as a substitute for a slip or the like. Furthermore, the rewrite type data carrier also needs EEPROM memory and the like,
There is a disadvantage that the cost is increased because a memory chip is required.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem. A low-cost WORM-type data carrier which can use a display function itself as a memory without using a semiconductor memory as a memory is provided. An object of the present invention is to provide the data reading device.

[0005]

According to a first aspect of the present invention, there is provided a display device comprising at least one digit for displaying an arbitrary numerical value set by seven segments, and at least a P-shaped part of the seven segments of the display. Reading means for reading numerical information set by reading each of the five segments.

According to the invention of claim 2 of the present application, the display section forms a conductor pattern at least at a position of five P-shaped segments that can identify each numerical value among the seven segments,
When an arbitrary numerical value is set, a segment corresponding to the numerical value is cut.

In the invention according to claim 3 of the present application, the display section has electrodes formed above and below at least a P-shaped five-segment portion capable of identifying each numerical value among the seven segments, and anisotropically conductive between the electrodes. A film is formed, and upper and lower electrodes are short-circuited via the anisotropic conductive film when setting a numerical value.

[0008] In the invention of claim 4 of the present application, the reading means has a resonance circuit for receiving a high-frequency signal intermittently and periodically, and at least five P-shaped segments of the display unit are connected to a parallel input terminal. A shift register, a clock demodulation circuit that demodulates a clock obtained by the resonance circuit, and outputs the demodulated clock as a shift pulse to the shift register, and a resonance circuit that resonates the resonance circuit based on a serial signal read from the shift register. And a vibration absorbing circuit that absorbs vibration.

According to a fifth aspect of the present invention, at least one digit display portion for displaying an arbitrary numerical value set by seven segments and at least five P-shaped segments which can identify each numerical value among the seven segments penetrate. Penetration pattern,
First to fifth capacitors connected in series to the through pattern, a coil connected in parallel to the series connection of the through pattern and each capacitor, and a sixth capacitor connected in parallel to the coil. Including a resonance circuit for each digit of the display unit, wherein the resonance frequency of the resonance circuit determined by cutting a segment according to the numerical value at the time of setting the numerical value is set to different values from each other. Is what you do.

According to a sixth aspect of the present invention, at least one digit display portion for displaying an arbitrary numerical value set by seven segments, and at least a P-shaped five-segment which can identify each numerical value among the seven segments are provided above and below. A pair of electrodes provided, an anisotropic conductive film inserted between the electrodes, first to fifth capacitors connected in series to each electrode, and connected in parallel to each series connection of the electrode and each capacitor. And a resonance circuit including a coil for each digit of the display unit,
When setting a numerical value, a segment corresponding to the numerical value is pressed, and the resonance frequency of the resonance circuit determined by short-circuiting the pair of electrodes via the anisotropic conductive film has a different value from each other. It is.

The invention of claim 7 of the present application is directed to claim 5 or 6
What is claimed is: 1. A data reading device for reading data of a data carrier according to claim 1, wherein the variable frequency oscillation circuit oscillates a resonance frequency that can be set to the data carrier, and a transmission coil is driven by intermittently oscillating an output of the variable frequency oscillation circuit. Modulating circuit, a receiving coil for detecting reverberation from the data carrier, a band-pass filter for passing a reverberation frequency corresponding to the oscillation frequency of the variable frequency oscillation circuit obtained by the receiving coil, and a level exceeding a predetermined level. And a demodulation circuit for demodulating the output of the bandpass filter.

According to the first aspect of the present invention having such a feature, the display unit is set for each digit by determining whether or not five P-shaped segments out of seven Japanese-shaped segments are displayed. Since the numerical value can be identified, the reading means reads the 5-segment data. According to the second and third aspects of the present invention, numerical values are set by cutting or pressing segments of the display unit. By doing so, the pattern of the segment is cut or conductive, and the logical level of data from five segments, which can identify the set numerical value among the seven segments, is determined. The logical level is read by a numerical value set by the reading means. Therefore, the setting of the numerical value can be directly written into the memory. According to the fourth aspect of the present invention, the readout means includes a resonance circuit and a shift register for converting the data of the segment of the display unit from parallel to serial, a clock demodulation circuit, and a vibration absorption circuit. The data of each segment is read. According to the fifth and sixth aspects of the present invention, since the data carrier is constituted by the resonance circuit having different resonance frequencies according to the display of the display segments, the data is read out by confirming the resonance frequency from outside. . Further, according to the invention of claim 7, the oscillation frequency is intermittently changed according to the resonance frequency set by the data carrier of claim 5 and 6, and the frequency at which reverberation occurs is read out as the set frequency. It was made.

[0013]

FIG. 1 is a block diagram showing the overall configuration of a data carrier according to this embodiment, and FIG. 2 is a schematic diagram showing its shape. As shown in these figures, the data carrier 1 has a flat card shape and includes a flexible substrate. The data carrier 1 is formed with a numerical display section 2 having two digits and seven segments. The display of these seven segments is shown in FIG.
As shown by enlarging the digits, seven display segments 3a
３3 g are formed in the shape of “day”. If the display segment is active (display state) except for example 3d, 0 is displayed, and if only the display segments 3c and 3f are active (display state), 1 is displayed.
Will be displayed. In this way, as shown in FIG. 4A, one-digit numerical values from 0 to 9 can be displayed. Here, 3a of these seven display segments
If the state of the five segments from to 3e can be determined, that is, if the state of the five segments in the “P” shape can be confirmed, the numerical value can be specified. According to the present invention, a one-digit numerical value is determined based on such a principle based on whether or not a P-shaped 5-bit display segment is active. That is, if attention is paid only to the five segments to be determined with respect to the display from "0" to "9" of each display segment shown in FIG. 4A, the state shown in FIG. Since these are all in different states, the numerical value set and displayed can be recognized from the 5-bit data.

In the first embodiment, as shown in FIG. 3, a penetrating pattern is formed on the numerical value display section 2 of the data carrier 1 so as to penetrate a P-shaped display segment. One end of this pattern is commonly connected and connected to, for example, a power supply Vcc, and the other end is connected to a ground terminal via a pull-down resistor. The display segments 3a to 3e are connected to terminals 4a to 4e, respectively. In this state, an arbitrary display segment of the sheet-shaped data carrier 1 is cut so as to be cut out, and a numerical value is set and displayed. In this case, when the display segment is cut, the terminal of the segment is set to the logic L level by the pull-down resistor, and the numerical value can be determined from the logic state of each segment. The terminals of each of these segments are connected to the IC chip 5 as shown in FIG. The IC chip 5 includes an antenna coil 6 and a capacitor 7
Is also connected.

Next, the configuration of the IC chip 5 and its peripheral circuits will be described with reference to FIG. First, a resonance circuit 11 is formed by the antenna coil 6 and the capacitor 7, and a rectification circuit 13 and a vibration absorption circuit 14 are connected to the resonance circuit 11. The rectifier circuit 13 rectifies and smoothes the signal obtained by the resonance circuit 11 and outputs the signal to the power supply circuit 15. Power supply circuit 1
Numeral 5 stabilizes the rectified output and supplies the power supply Vcc to each section. The power supply reset circuit 16 resets the shift register 17 when the power supply rises. The shift register 17 receives a parallel signal of a total of 10 bits, that is, 5 bits for each digit of the numerical value display unit 2. The clock demodulation circuit 18 extracts a clock signal from the resonance circuit 11 and supplies it to the shift register 17 as a shift pulse. The vibration absorbing circuit 14 controls reverberation of the resonance circuit 11 based on a serial signal output from the shift register 17. In this embodiment, the IC chip 5 and the resonance circuit 11 constitute reading means for reading numerical information set on the display unit.

Next, the operation of this embodiment will be described with reference to a time chart. In the data carrier of this embodiment, for example, as shown in FIG.
It is assumed that the digit value “72” has been cut out in the data carrier. "72" is displayed as it is by this cutout. In this case, as shown in FIG. Are 1 to 5, as shown in FIG. 5C, 1 and 3 bits for the number “7”, and 1, 3 for the number “2”.
4, 5 bits have been truncated. Therefore, the bit is set to L level by the pull-down resistor, and the remaining bits are set to H level.

At first, as shown in FIG. 6A, a fixed carrier signal is continuously transmitted from a transmitting antenna (not shown) on the reader side, and then a high-frequency signal having a fixed duty ratio is transmitted at a fixed cycle. Is input to In the resonance circuit 11 of the data carrier 1, this signal is rectified and used as a power source, so that power is supplied from the power source circuit 15 to each unit. FIG. 6B shows a power supply waveform of the data carrier. After a predetermined time after the rise of the power, a power reset signal is output from the power reset circuit 16 to the shift register 17 as shown in FIG. Thereafter, the clock is demodulated by the clock demodulation circuit 18 as shown in FIG. Shift register 17
Since the parallel signal is read as a serial signal according to the logical level of the two-digit numerical display unit 2, the read output is as shown in FIG.
(E) is output to the vibration absorbing circuit 14 as a vibration absorbing pulse. When the vibration absorption pulse is at the H level, the vibration is not absorbed, and when the vibration absorption pulse is at the L level, the vibration is completely absorbed. Therefore, the resonance waveform of the resonance circuit 11 of the data carrier 1 is as shown in FIG.
It becomes what is shown in.

The receiving antenna on the reader side receives this resonance waveform and discriminates it at a predetermined level to obtain the signal shown in FIG.
The received waveform shown in (g) is output. Then, by determining the level of the received waveform based on the transmission waveform and the sampling clock shown in FIG. 6 (h) with a slightly delayed timing, the read data is read as shown in FIG. 6 (i). Thereby, the numerical value “72” set in the data carrier 1 can be read. As described above, in the present embodiment, the data display and the stored contents can be completely matched with a simple configuration. And EEPROM
The data can be electrically read without using a memory element such as.

Next, a second embodiment of the present invention will be described. In the first embodiment described above, the numerical value display section has a pattern penetrating therethrough, and the numerical value is displayed by cutting in accordance with the display segment. However, the segment indicating the numerical value is not cut off but is embossed. The set numerical value can be read. FIG. 7 is a circuit diagram of the display unit, and FIG. 8 is a sectional view showing a segment of the display unit. The other parts are the same as those in FIGS. 1 and 2 and will not be described. In this embodiment, the display section is provided between the outer films 21 and 22. Of the seven segments, as in the first embodiment, the upper electrode 23 is used for five P-shaped segments.
a to 23e are formed, and the lower electrodes 24a to 24e having the same configuration are formed below each of them. No electrodes are formed on the upper and lower portions of the other two segment portions. In FIG. 7, the upper electrodes 23a to 23e are displayed in black, and the lower electrodes 24a to 24e are displayed by shades. An anisotropic conductive film 25 is formed between these electrodes. The anisotropic conductive film 25 is a mixture of resin and metal powder. Since the resin exists between the electrodes, the upper and lower electrodes are not conductive. However, when the segment portion is pressed by embossing, the metal powder of the anisotropic conductive film 25 comes into contact between the upper and lower electrodes as shown in FIG. As a result of the conduction state, 5-bit data can be output in the circuit diagram shown in FIG. 7, as in the first embodiment described above. In this case, the segment which has been embossed becomes conductive and becomes H level, and the segment which has not been embossed becomes L level by a pull-down resistor. Therefore, although the logic level is reversed from that of the first embodiment, the numerical data set by embossing can be read out in the same manner even when the entire circuit portion has the same configuration.

Next, third and fourth embodiments of the present invention will be described. In the first and second embodiments described above,
Although an IC chip having a rectifier circuit, a power supply circuit, a power supply reset circuit, a shift register, and the like is provided to read data, in the third and fourth embodiments, a data carrier is constituted only as a resonance circuit. It is. The numerical value that can be displayed and set may be a single digit or a plurality of digits. FIG. 9 is a diagram illustrating a display portion for one digit (hereinafter, referred to as a resonance tag) according to the third embodiment. This data carrier is made up of an arbitrary number of resonance tags, and is made up of a sheet-like 7-segment display unit as in the first embodiment. As in the first embodiment, the pattern is formed in five P-shaped segments out of the seven segments. In the pattern, a pattern penetrating each segment portion and capacitors C1 to C5 are connected in series. Each series connection body is connected in parallel, and one end is connected to the inner peripheral pattern of the coil 31 and the other end is connected to the outermost peripheral pattern portion of the coil 31 from the back surface of the substrate via a through hole. A capacitor C always connected in parallel with the coil 31
6 is also provided. Thus, a resonance circuit is formed by the capacitors C1 to C6 and the coil 31.

In this resonance tag, the capacitor of the segment whose segment has been cut off by the single digit display in the same manner as in the first embodiment does not enter the resonance circuit.
Only the uncut segments of the capacitors are added to the resonant circuit. Therefore, when the numerical values "1" to "0" are set (displayed), the combined capacitances Ca to Cj are as follows. “1” Ca = C1 + C2 + C3 + C5 + C6 “2” Cb = C2 + C6 “3” Cc = C2 + C5 + C6 “4” Cd = C1 + C5 + C6 “5” Ce = C4 + C5 + C6 “6” Cf = C4 + C6 “7” Cg = C2 + C6 + 5 Ci = C5 + C6 "0" Cj = C3 + C6

Accordingly, the capacitances C1 to C6 of the capacitors are set so that Ca to Cj are different from each other so that each set numerical value can be identified. In this way, "0" ~
It is possible to configure the resonance frequency of the entire resonance circuit to be different by the numerical display of “9”.

FIG. 10 shows a display unit (resonance tag) 32 to 35 comprising a resonance circuit constructed in this way, provided with a plurality of digits. In this case, it goes without saying that the value of the coil or the capacitor is made different for each resonance circuit so that the same resonance frequency does not occur in all the resonance circuits.

FIG. 11 is a diagram showing an example of a resonance tag of a data carrier according to the fourth embodiment. In this embodiment, as in the second embodiment, P
An upper electrode and a lower electrode are provided above and below a segment of a letter-shaped portion, an anisotropic conductive film is further provided between the electrodes, and the electrodes are short-circuited by embossing. In this case, since the capacitors are connected even when all the patterns are processed, another capacitor C6 is not required.
Other configurations are the same as those of the third embodiment. Also in this case, when numerical values "1" to "0" are set, the capacitances connected to the resonance circuit are as follows for Ca to Cj. “1” Ca = C4 “2” Cb = C1 + C3 + C4 + C5 “3” Cc = C1 + C3 + C4 “4” Cd = C2 + C3 + C4 “5” Ce = C1 + C2 + C3 “6” Cf = C1 + C2 + C3 + C5 “7” Cg + C4 + 9 = C1 + C4 + 8 Ci = C1 + C2 + C3 + C4 "0" Cj = C1 + C2 + C4 + C5

Next, a data reading device for reading data from a data carrier according to the third or fourth embodiment will be described. FIG. 12 is a block diagram showing a data reading device. In this figure, the variable frequency oscillation circuit 42 has frequencies f _{a to} f _j that may be set as respective numerical values.
This is the circuit that oscillates. The oscillation frequency f _x is {2π√
(LCx)｝ ⁻¹ , (x = a to j). The oscillation output is given to the modulation circuit 43. The modulation circuit 43 is controlled so as to intermittently oscillate at the frequency for a designated time, and the modulation output is transmitted to the data carrier via the transmission coil 44. The receiving coil 45 has a variable bandpass filter 46.
Is connected. The variable bandpass filter 46 is a bandpass filter that passes ten frequencies set by the control circuit 41, and the demodulation circuit 47 integrates and detects the signal passed through the variable bandpass filter 46, and converts the signal into a binary signal by a comparator. This is converted and output to the control circuit 41. The control circuit 41 specifies ten frequencies to perform intermittent oscillation, and controls the variable band-pass filter 46 to pass the oscillation frequency before oscillation stop during oscillation stop. During this period, the output from the demodulation circuit 47 is monitored, and control is performed so that the frequency is sequentially switched.

Next, the operation of the data reading apparatus according to this embodiment will be described with reference to a time chart.
13 (a) shows shows a read control input of the data reading device, the oscillation frequency as shown in this input is given FIG. 13 (b) are sequentially switched to f _a ~f _j. In response to this, the pass frequency of the variable band-pass filter 46 is switched as shown in FIG. When the in this resonant tag and that have been set, for example, the numerical value "3", the resonance frequency has a f _c. When it oscillated frequency f _c so that its reverberation signal is obtained through the variable band-pass filter 46. Therefore, the demodulation circuit 4
When detected by 7 can be the output level is increased only during the reverberation f _c, is output from the comparator.
Thereby, the numerical value set in the data carrier can be recognized. In this way, the data reading device sequentially switches to the frequency corresponding to each resonance frequency, and can determine the value of the data carrier depending on whether reverberation is obtained.

The data reading apparatus according to the present embodiment reads a numerical value set in a single-digit resonance tag. However, when a multi-digit numerical value is set as shown in FIG. It is necessary to sequentially switch to the oscillation frequency of all the display digits and read out the numerical values set for each digit.

[0028]

As described above in detail, according to the first to sixth aspects of the present invention, it is not necessary to mount a semiconductor memory on a data carrier, and the circuit configuration can be made extremely simple and inexpensive. . Further, since the setting of the numerical value on the display unit itself can be treated as writing to the memory, the writing of the data does not require the use of a special writer, and is extremely easy. Further, according to the third aspect of the present invention, by providing electrodes above and below the segment, data can be displayed without cutting the segment, so that data can be displayed regardless of the background color of the data carrier. Further, according to the fifth and sixth aspects of the present invention, since the resonance circuit is configured so that the resonance frequency is changed by setting the numerical value of the data carrier, it is not necessary to use an IC chip for the reading means.
The data carrier can be configured with a very simple configuration. According to the seventh aspect of the invention, the numerical value set in the data carrier according to the fifth and sixth aspects can be read out from the reverberant frequency by sequentially switching the oscillation frequency.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of a data carrier according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a data carrier and a pattern thereof according to the present embodiment.

FIG. 3 is a circuit diagram showing a numerical display unit and a connection pattern according to the embodiment;

FIG. 4 is a diagram showing each numerical value and 5-bit data for reading data on a display unit according to the embodiment.

FIG. 5 is a diagram showing an example of a state in which a numerical value is set on the display unit according to the present embodiment and an example of 5-bit data read from the set numerical value.

FIG. 6 is a time chart showing the operation of this embodiment.

FIG. 7 is a circuit diagram showing a pattern of a display section of a data carrier according to a second embodiment of the present invention.

FIG. 8 is a sectional view of a numerical value display section of a data carrier according to the second embodiment.

FIG. 9 is a diagram illustrating a resonance tag of a data carrier according to a third embodiment of the present invention.

FIG. 10 is a schematic diagram showing an overall configuration of a data carrier according to a third embodiment.

FIG. 11 is a diagram illustrating a resonance tag of a data carrier according to a fourth embodiment of the present invention.

FIG. 12 is a block diagram showing a data reading device for reading data from a data carrier according to the third and fourth embodiments.

FIG. 13 is a time chart showing waveforms of various parts of the data reading device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Data carrier 2 Numerical display part 3a-3g Display segment 4 Terminal 5 IC chip 6 Coil 7 Capacitor 11 Resonance circuit 13 Rectifier circuit 14 Vibration absorption circuit 15 Power supply circuit 16 Power supply reset circuit 17 Shift register 18 Clock demodulation circuit 21, 22 Exterior film 23a to 23e Upper electrode 24a to 24e Lower electrode 31 Coil 32 to 35 Resonant tag 41 Control circuit 42 Variable frequency oscillation circuit 43 Modulation circuit 46 Variable band pass filter 47 Demodulation circuit

Claims (7)

[Claims] 1. A display unit of at least one digit for displaying an arbitrary numerical value set by 7 segments, and a numerical value set by reading at least 5 segments of a P-shaped portion among the 7 segments of the display unit. Data reading means for reading information. 2. The display section forms a conductor pattern at least at a position of at least five P-shaped segments that can identify each numerical value among seven segments, and cuts a segment corresponding to the numerical value when setting an arbitrary numerical value. The data carrier according to claim 1, wherein 3. The display section has electrodes formed above and below at least a P-shaped five-segment portion capable of identifying each numerical value among the seven segments, and an anisotropic conductive film is formed between the electrodes. 2. The method according to claim 1, wherein the upper and lower electrodes are short-circuited via the anisotropic conductive film during setting.
The stated data carrier. 4. A reading circuit comprising: a resonance circuit for receiving a high-frequency signal intermittently intermittently; a shift register having at least five P-shaped segments of the display unit connected to a parallel input terminal; A clock demodulation circuit that demodulates the clock obtained in step (a) and outputs the demodulated clock to the shift register as a shift pulse; and a vibration absorption circuit that absorbs resonance vibration of the resonance circuit based on a serial signal read from the shift register. The data carrier according to any one of claims 1 to 3, further comprising: 5. A display unit of at least one digit for displaying an arbitrary numerical value set by seven segments; a penetrating pattern penetrating at least five P-shaped segments capable of identifying each numerical value of the seven segments; First to fifth capacitors connected in series, a coil connected in parallel to the series connection of the through pattern and each capacitor, a sixth capacitor connected in parallel to the coil
And a resonance circuit including a capacitor for each digit of the display unit, and the resonance frequencies of the resonance circuit determined by cutting a segment corresponding to the numerical value when setting the numerical value are set to different values from each other. A data carrier, characterized in that: 6. A display unit of at least one digit for displaying an arbitrary numerical value set by seven segments, and a pair of electrodes provided above and below at least five P-shaped segments capable of identifying each numerical value among the seven segments, A resonance circuit including an anisotropic conductive film inserted between the electrodes, first to fifth capacitors connected in series to each electrode, and a coil connected in parallel to each series connection of the electrodes and each capacitor; , For each digit of the display section, and when setting a numerical value, pressing a segment corresponding to the numerical value and short-circuiting a pair of electrodes via an anisotropic conductive film. A data carrier having resonance frequencies different from each other. 7. A data reading device for reading data of a data carrier according to claim 5, wherein the variable frequency oscillation circuit oscillates a resonance frequency that can be set to the data carrier; A modulation circuit for intermittently oscillating an oscillation output to drive a transmission coil; a reception coil for detecting reverberation from the data carrier; and a reverberation frequency corresponding to an oscillation frequency of the variable frequency oscillation circuit obtained by the reception coil. A data reading device comprising: a bandpass filter; and a demodulation circuit for demodulating an output of the bandpass filter exceeding a predetermined level.