JPH06150078A - Non-contact ic memory card system - Google Patents

Abstract

PURPOSE:To surely transmit optical signals to be transmitted without being affected by scattered light and to increase the quantity of information to be transmitted by making the optical signals to be transmitted correspondent to data as multiple values concerning a non-contact IC memory card for exchanging data with a main body unit by utilizing light. CONSTITUTION:Concerning a non-contact IC memory card 1 inserted to the main body unit provided with light emitting elements 2 and 12 and light receiving elements (A) 6 and 10 so as to exchange data with the main body unit with light by providing light receiving elements (B) 5 and 15 and liquid crystal 4 and 14, the light receiving elements (B) 5 and 15 of the non-contact IC memory card 1 receive control signals of the optical signals of written data from the light emitting elements 2 and 12 of the main body unit, and the non-contact IC memory card 1 is provided with light shielding parts 3 and 13 for shielding the scattered light from the outside by covering the upper parts of the light receiving elements (B) 5 and 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact type IC memory card which uses light to exchange data with a main unit.

In a normal IC card, electrical contacts are inserted into sockets of the main body device, and data is transferred via the electrical contacts. When an IC card having electrical contacts is used in a corrosive atmosphere in a factory or the like, the contacts may be corroded and the IC card may become unusable in a short period of time. Therefore, a non-contact type IC memory card has been developed which transfers data to and from the main body device without using electrical contacts.

[0003]

2. Description of the Related Art FIG. 9 shows a conventional non-contact type IC memory card for optically writing and reading data.

FIG. 1A shows a structure for writing. In the figure, 200 is a main body device, and 201 is a non-contact type IC memory card. In the main body device 200, reference numeral 211 denotes a control light emitting element, which outputs a control signal for designating a write instruction and a write address, and write data as an optical signal. A control unit 210 controls the main body device 200.

In the non-contact type IC memory card 201, 220 is a light receiving element (B). A writing control unit 221 controls writing of the write data received by the light receiving element (B) 220 into the memory 222. A memory 222 stores data.

The operation of the configuration shown in the figure will be described. Control unit 210
Sends a signal representing the write data. The control light emitting element 211 blinks based on the signal representing the write data, and transmits an optical signal to the light receiving element (B) 220.

In the non-contact type IC memory card 201, the light receiving element (B) 220 receives the optical signal sent from the control light emitting element 211. Light receiving element (B) 220
Converts optical signals into electrical signals. Then, the write controller 221 writes the received write data to the address designated by the control data.

(B) shows a structure for reading. In the figure, 200 is a main body device, and 201 is a non-contact type IC memory card. In the main body device 200, 210 is a control unit, 211 is a control light emitting element, and 212 is a reading light emitting element. A light receiving element (A) 213 receives the read signal.

In the non-contact type IC memory card 201, 220 is a light receiving element (B), 222 is a memory, and 223.
Is a read control unit, which reads data stored in the memory 222 based on a control signal (a read instruction and an address of the memory 222) output from the light receiving element (B) 220. A liquid crystal control unit 224 drives the liquid crystal so that a pattern (bar code, characters, etc.) according to the read data is displayed on the liquid crystal. A liquid crystal 225 displays a pattern represented by the read data.

The operation of the configuration shown in the figure will be described. The control light emitting element 211 blinks based on a control signal (reading instruction, read address, etc.) transmitted from the control unit 210, and sends a control signal to the light receiving element (B) 220.

In the non-contact type IC memory card 201, the light receiving element (B) 220 receives a light control signal and converts it into an electric signal. The read control unit 223 reads data from the memory 222 based on the control signal converted into an electric signal by the light receiving element (B) 220. The liquid crystal control unit 234 drives the liquid crystal 225 and displays a pattern (bar code, characters, etc.) corresponding to the read data.

The reading light emitting element 212 on the main body side emits light, and the light passes through the liquid crystal 225 and the light receiving element (A) 21.
Light is received at 3. The light receiving element (A) 213 receives the light transmitted through the liquid crystal, converts the light into an electric signal corresponding to the pattern displayed on the liquid crystal, and outputs the electric signal. The control unit 210 inputs the electric signal converted by the light receiving element (A) 213 and processes the read data.

[0013]

In the non-contact type IC memory card which optically exchanges signals with the main body device, an optical signal is accurately transmitted, and the optical signal may be disturbed by scattered light from the outside. Need not to. In the conventional non-contact type IC memory card, due consideration has not been given sufficiently, and scattered light other than signal light may be incident to cause malfunction. Moreover, since the conventional signal transmission using light was binary, the amount of information that could be transferred was small.

The present invention provides a non-contact type IC memory card in which an optical signal to be transmitted is surely transmitted without being affected by scattered light. Another object of the present invention is to provide a non-contact type IC memory card in which an optical signal to be transmitted is associated with data in a multi-valued manner by associating with the light amount, and the amount of information transmission is increased.

[0015]

FIG. 1 is a basic configuration of the present invention.
(1) and (2), FIG. 2 shows the basic configuration (3) and
(4) and FIG. 3 show the basic configurations (5) and (6) of the present invention.

FIG. 1A shows a basic structure (1) (transmission type) of the present invention (corresponding to claim 1). In the figure, 1 is a non-contact type IC memory card, 2 is a light emitting element, which is provided in the main body device, emits an optical signal for control and makes it enter a light receiving element (B) 5, and The light that passes through the liquid crystal 4 and enters the light receiving element (A) 6 is emitted. Reference numeral 3 denotes a light shielding portion which covers the upper portion of the light receiving element (B) 5 so that scattered light from the outside does not enter. Reference numeral 4 is a liquid crystal. A light receiving element (B) 5 receives a control signal generated by the light emitted from the light emitting element 2 and converts it into an electric signal. Reference numeral 6 denotes a light receiving element (A) on the side of the main body device, which receives light emitted by the light emitting element 2 and transmitted through the liquid crystal 4.

The operation of the configuration shown in the figure will be described later (see the section on operation). FIG. 1 (b) shows the basic configuration (2) (reflection type) of the present invention. In the figure, reference numeral 10 denotes a light receiving element (A), which is provided in the main body device and receives light that passes through the liquid crystal and is reflected by the reflecting plate 16. Reference numeral 11 is a non-contact type IC memory card. Reference numeral 12 denotes a light emitting element, which is provided in the main body device, emits an optical signal for control and enters the light receiving element (B) 15, and also passes through the liquid crystal 14 and is reflected by the reflecting plate 16 to receive the light receiving element (A ) The light incident on 10 is emitted. Reference numeral 13 denotes a light shielding portion which covers the upper portion of the light receiving element (B) 5 and shields scattered light from the outside. Reference numeral 14 is a liquid crystal. Reference numeral 15 is a light receiving element (B), which receives a control signal and write data by the light output from the light emitting element 12 and converts it into an electric signal. Reference numeral 16 denotes a reflecting plate which reflects light transmitted through the liquid crystal 14 using the light emitting element 2 as a light source in the direction of the light receiving element (A) 10.

The operation of the configuration shown in the figure will be described later (see the section on operation). FIG. 2 (a) shows a basic structure (3) of the present invention (a structure in which the reflection plate is a condensing type) (corresponding to claim 2).

In the figure, 10 is a light receiving element (A) on the side of the main body device. Reference numeral 11 is a non-contact type IC memory card. A light emitting element 12 is provided in the main body device. Reference numeral 14 is a liquid crystal, and 15 is a light receiving element (B). Reference numeral 16 denotes a reflector, which uses the light emitting element 12 as a light source to reflect the light that is transmitted through the liquid crystal 14 and is incident.
The light is collected and made incident on the light receiving element (A) 10.

The operation of the configuration shown in the figure will be described later (see the section on operation). FIG. 2B shows a basic structure (4) of the present invention (a structure in which the liquid crystal itself is a slit) (corresponding to claim 3).

In the figure, the liquid crystal 4 is divided into a plurality of areas by using the liquid crystal itself as a slit, and the transmitted light is processed in parallel to speed up the data processing. In the figure, 1
Is a non-contact type IC memory card, 2 is a light emitting element,
It is provided in the main body device. Reference numeral 4 is a liquid crystal, and 5 is a light receiving element (B). Reference numerals 6 and 6 ′ are light receiving elements (A) provided in the main body device. Light receiving element 6,
A plurality of 6'is provided to process the transmitted light of the liquid crystal 4 in parallel. Reference numeral 18 denotes a liquid crystal slit. The liquid crystal itself constitutes a slit, and the liquid crystal is divided into a plurality of regions to process a plurality of signals in parallel. The black shaded area is the one in which the color of the liquid crystal is dark (blackened, etc.) so that light does not pass through, and the area through which light passes is transparent.

The operation of the configuration shown in the figure will be described later (see the section on action). FIG. 3A shows a basic configuration (5) (write control) of the present invention (corresponding to claims 4 and 5).

The figure shows the writing of data in the case where an optical signal of write data and an optical signal of read data are assigned to a plurality of different light amounts and the light amount is controlled to transmit the optical signal according to the light amount. The configuration for is shown.

In the figure, 1 is a non-contact type IC memory card, and 1'is a main unit. 2 in the main unit 1 '
Is a light emitting element, and 20 is a light emission control unit, which controls light emission so that the light emitting element 2 emits light with the data to be written and the light amount corresponding to the data, and transmits the data.
Reference numeral 21 is write data, which represents digital data such as alphanumeric characters. Reference numeral 22 is a correspondence table of data and light quantity, which is a table for storing data in which write data 21 and light emission quantity of the light emitting element 2 are associated with each other.

In the non-contact type IC memory card 1, 5
Is a light receiving element (B), and 30 is a data judging section (B), which judges write data by referring to a data-light correspondence table 33 for a signal value based on the received light quantity of the light receiving element (B) 5. is there. Reference numeral 31 is a write control unit that controls the write data determined by the data determination unit (B) 30 to the memory 32. 32
Is a memory, and 33 is a correspondence table of data and light quantity, which is a table for storing data in which data and light quantity are associated with each other.

The operation of the configuration shown in the figure will be described later (see the section on action). FIG. 3B shows a basic configuration (6) (read control) of the present invention (corresponding to claims 4 and 5).

The figure is for reading data when a write data optical signal and a read data optical signal are assigned to a plurality of different light amounts, and the light amount is controlled to transmit the optical signal. Shows the configuration of.

Reference numeral 1 is a non-contact type IC memory card.
Reference numerals 1 ', 1 "are main body devices. In the main body devices 1, 1", 2 is a light emitting element, and 6 is a light receiving element (A). 22 '
Is a correspondence table between data and light quantity (same as reference numeral 22 in FIG. 3 (a)). 42 is a data determination unit (A),
The read data is determined by referring to the data / light quantity correspondence table 22 'for the signal value based on the received light quantity of the light receiving element (A) 6.

In the non-contact type IC memory card 1, 4
Reference numeral 40 is a liquid crystal, and 40 is a liquid crystal control unit, which has a degree of transparency such that a light amount corresponding to read data is incident on the light receiving element (A) 6 after the light having the light emitting element 2 as a light source passes through the liquid crystal 4. The liquid crystal is driven so that Four
A read control unit 1 reads data at a specified address from the memory 32.

The operation of the configuration shown in the figure will be described later (see the section on action). In each of the basic configurations described above, not only the light emitting element (light emitting element 2) for the control signal and the pattern of the read data (bar code, characters, etc.) displayed on the liquid crystal 4, but also the amount of light transmitted corresponding to the data is transmitted. In the case where the same light emitting element (light emitting element 2) is used as a light source for reading the liquid crystal display density when controlling the same, the conventional non-contact type IC memory card (Fig. 9)), different light emitting elements may be used.

Further, the basic configuration (4), the basic configuration (5), and the basic configuration (6) have been described for the transmissive type, but they may be of the reflective type.

[0032]

Operation The operation of (a) basic configuration (1) (transmission type) in FIG. 1 will be described. First, the case of reading data from the memory of the non-contact type IC memory card 1 will be described.

The light emitting element 2 controls the control signal (readout instruction,
It flashes based on a read address or the like) and transmits a control signal by light to the light receiving element (B) 5. Light receiving element (B) 5
Converts the received signal into an electric signal and transfers it to the control unit (not shown) of the non-contact type IC memory card 1. And
In the non-contact type IC memory card 1, data at a specified address is read from a memory (not shown), and the liquid crystal 4 displays a pattern corresponding to the read data. The light transmitted through the liquid crystal 4 using the light emitting element 2 as a light source becomes an optical signal representing the display pattern of the liquid crystal 4 and the light receiving element (A).
Light is received at 6. The light receiving element (A) 6 converts the received signal light into an electric signal and transfers it to the control section (not shown) of the main body device.

Next, a case of writing data in the memory of the non-contact type IC memory card 1 will be described. The light emitting element 2 blinks based on a control signal (writing instruction, write address, etc.) and transmits it as an optical signal to the light receiving element (B) 5. The light receiving element (B) 5 converts an optical signal into an electric signal and transfers it to the control section (not shown) of the non-contact type IC memory card 1. Then, the light emitting element 2 converts the write data into an optical signal and transfers it to the light receiving element (B) 5. The light receiving element (B) 5 converts the transmitted optical signal into an electric signal,
It is sent to the side of the control unit (not shown), and the data is written at the specified address in the memory.

In the configuration shown in the figure, since the light receiving element (B) 5 is shielded by the light shielding portion 3, the control signal and data by the light from the light emitting element 2 are not disturbed by scattered light from the outside. . Therefore, according to the present invention, the accuracy of the received signal of the light receiving element (B) 5 is increased, the malfunction of the main body apparatus is eliminated, and the reliability is improved.

The operation of the basic configuration (2) (reflection type) of FIG. 1B will be described. First, the case of reading data from the memory of the non-contact type IC memory card 11 will be described.

The light emitting element 12 blinks based on a control signal (readout instruction, read address, etc.) and is transmitted to the light receiving element (B) 15 as a light control signal. The light receiving element (B) 15 converts a control signal generated by light into an electric signal, transfers the electric signal to a control unit (not shown) of the non-contact type IC memory card 11, and outputs data of an address designated by the memory (not shown). Is read. Then, the liquid crystal 14 displays a pattern representing the read data. Reflected light that passes through the liquid crystal 14 using the light emitting element 12 as a light source and is reflected by the reflecting plate 16 to become an optical signal is received by the light receiving element (A) 10. The light receiving element (A) 10 converts an optical signal into an electric signal and transfers the electric signal to a control unit (not shown).

Next, a case of writing data in the memory of the non-contact type IC memory card 1 will be described. The light emitting element 12 blinks on the basis of a control signal (writing instruction, write address, etc.), and receives a light control signal from the light receiving element (B) 15
To transmit. The light receiving element (B) 15 converts an optical signal into an electric signal and transmits it to the control section (not shown) of the non-contact type IC memory card 11. Then, the light emitting element 12 converts the write data into an optical signal and transmits it to the light receiving element (B) 15. The light receiving element (B) 15 converts an optical signal transmitted from the light emitting element 12 into an electric signal and sends it to a control unit (not shown). Then, the data transmitted from the main unit is written in the memory.

In the structure shown in the figure, since the light receiving element (B) 15 is shielded by the light shielding portion 3, the control signal and the data signal from the light emitting element 12 are not disturbed by scattered light from the outside. Therefore, according to the present invention, the accuracy of the received signal of the light receiving element (B) 15 is increased, the malfunction of the main body device is eliminated, and the reliability is improved.

The operation of (a) basic configuration (3) (configuration in which the reflection plate is a condensing type) of FIG. 2 will be described. The configuration of the figure shows the reflector 1
6 is a condensing type, and the emitting element 12 is a light source.
The light reflected by 6 is condensed and transmitted to the light receiving element (A) 10. The signal transfer operation is similar to that of the above-mentioned reflection type, and therefore its explanation is omitted.

In the structure shown in the figure, since the reflecting plate 16 is structured like a concave mirror, the reflected light is condensed and incident on the light receiving element (A) 10. Therefore, according to the present invention,
Optical signals are efficiently collected in the light receiving element (A) 10, the signal accuracy (SN ratio, etc.) is improved, and the reliability is improved.

The operation of the basic configuration (4) (configuration in which the liquid crystal itself is a slit) in FIG. 2B will be described. In the non-contact type IC memory card, if the read and write data are transferred in parallel, the operation speed can be increased.

In such a case, it is necessary to divide the liquid crystal into a plurality of regions and drive them in parallel. In the figure, the slit that divides the liquid crystal for that purpose is composed of the liquid crystal itself. The operation of passing the signal is the same as that of the transmission type, so that the description will be omitted.

The liquid crystal slit 18 is a slit in which a portion that transmits light and a portion that blocks light by driving the liquid crystal are formed by the liquid crystal itself. In the configuration shown in the figure, the light transmitted through the transparent area divided by the slits of the liquid crystal slit 18 is received by the light receiving element (A) 6 and the light receiving element (A) 6 ', converted into electric signals and controlled as parallel signals. Section (not shown)
Transferred to.

According to the present invention, the slit for dividing the incident area of the incident light and the incident area of the reflected light is constituted by the liquid crystal itself, so that the constitution of the non-contact type IC memory card is simplified.
The operation of the basic configuration (5) (write control) in FIG. 3A will be described.

The light emission control section 20 receives the write control signal (2
The light emitting element is controlled to blink according to the value), and the control signal is transmitted by light. Next, the light emission control unit 20 refers to the correspondence table 22 between the data and the light amount, and controls the light emission of the light emitting element 2 so that the write data is emitted with the light amount corresponding to the data. The light emitting element 2 emits light with a light amount corresponding to the write data and outputs an optical signal of the write data. The light receiving element (B) 5 converts the received optical signal into an electric signal. Since the amount of received light is the amount of light determined corresponding to the write data, an electric signal (voltage value or current value) corresponding to the write data is output from the light receiving element (B) 5. Therefore,
The data determination unit (B) 30 refers to the data-light correspondence table 33 and determines the write data represented by the received signal. The write controller 31 stores write data in the memory 32.
Write in.

The operation of the basic configuration (6) (reading control) in FIG. 3B will be described. A control signal is given by light from the light emitting element 2. (This operation is the same as the control signal passing operation in the writing operation of FIG. 3A). The read control unit 41 reads the data of the specified address from the memory 32. The liquid crystal control unit 40 refers to the data-light correspondence table 33 for the read data, and drives the liquid crystal 4 so that light is transmitted with the light quantity corresponding to the data.

The liquid crystal 4 performs a pattern display (changing the density of the emitted color, etc.) such that the light is transmitted in an amount corresponding to the data. Then, the light having the light emitting element 2 as a light source passes through the liquid crystal 4 and is received by the light receiving element (A) 6 with a light amount determined according to the read data.

The light receiving element (A) 6 converts the received light into an electric signal corresponding to the amount of light received. Then, the received data is determined by referring to the correspondence table 22 ′ between the data of the main body device and the light amount.

According to the present invention, since the data is associated with the multi-valued light amount determined according to the light transmission amount of the liquid crystal which can be analog-controlled, the amount of information to be processed can be greatly increased.

[0051]

EXAMPLE FIG. 4 shows an example (1) of the present invention. The figure shows an embodiment of the basic configuration (2) of the present invention.

In the figure, 51 is a non-contact type IC memory card, and 52 is a light emitting element, which is provided in the main unit. 53 is a light shielding part. Reference numeral 54 is a liquid crystal, and 55 is a light receiving element (B).

In the configuration shown in the figure, the light receiving element (B) 55 is arranged on the side opposite to the reflecting plate so that it can be positioned as close to the light emitting element 52 as possible, and the liquid crystal is also provided with a slanted portion as shown in the figure. .

With the configuration shown in the figure, the signal light from the light emitting element 52 is effectively incident on the light receiving element (B) 55. Further, since the light receiving element (B) 55 is completely shielded by the light shielding portion 53, the light receiving element (B) 55 is not disturbed by external scattered light.

FIG. 5 shows an embodiment (2) of the present invention. (a) is an embodiment of the basic configuration (1) of the present invention. By providing an external slit 66 in the liquid crystal, the liquid crystal is divided into a plurality of regions and data is processed in parallel to increase the speed.
3. The external slit 66 prevents an optical signal from being disturbed by interference between scattered light and signal light from the outside.

In the figure, 61 is a non-contact type IC memory card, and 62 is a light emitting element array, which comprises a plurality of light receiving elements 62 '. Reference numeral 63 denotes a light shielding portion which shields scattered light outside the control light receiving element 67. Reference numeral 64 is a liquid crystal, and 65 is a light receiving element (A) array, which comprises a plurality of light receiving elements (A) 65 '. Reference numeral 66 denotes an external slit, which is a light emitting element array 62.
The liquid crystal region is divided corresponding to each light emitting element 62 '. 67 is a control light receiving element.

With the configuration shown in the figure, when the liquid crystal is divided and operated in parallel, the transmitted light is not scattered and the signal does not interfere with the adjacent area. Further, since interference due to scattered light from the outside is also shielded by the light shielding portion 63 and the external slit 66, the reliability of the parallel operation becomes high.

FIG. 5B shows an embodiment of the basic structure (1), the basic structure (2) and the basic structure (4) of the present invention. The figure shows a case where the liquid crystal itself constitutes a slit and the liquid crystal itself is provided with the light shielding portion 63 of the control light emitting element 67.

In the figure, 61 is a non-contact type IC memory card, and 62 is a light emitting element array, which comprises a plurality of light receiving elements 62 '. Reference numeral 63 is a light-shielding portion, which prevents light from passing through a part of the liquid crystal and controls the light receiving element 6
The external scattered light with respect to 7 is shielded. Reference numeral 64 is a liquid crystal, and 65 is a light receiving element (A) array, which comprises a plurality of light receiving elements (A) 65 '. Reference numeral 66 ′ is a liquid crystal slit, and each of the light emitting elements 6 of the light emitting element array 62.
A region corresponding to 2'is made to transmit light, and a liquid crystal region is divided so that light does not pass between adjacent regions. 67 is a control light receiving element.

In the structure shown in the figure, the slit for dividing the liquid crystal and the light shielding portion 63 are composed of the liquid crystal itself, so that the structure of the IC card is simplified. Further, in parallel operation, transmitted light is not scattered and signals do not interfere with an adjacent area, and the control light receiving element 67 is also shielded by the light shielding unit 63, so that the reliability of parallel operation is high (a) It is similar to the case of.

FIG. 6 shows an embodiment (3) of the present invention, which is an embodiment of the basic configuration (3) of the present invention. (a) shows the case where the reflection plate is a condensing type to prevent scattering of reflected light. In the figure, 71 is a non-contact type IC memory card. Reference numeral 72 denotes a light emitting element / light receiving element array, which is composed of a plurality of light emitting elements 72 'and a plurality of light receiving elements (A) 72 ". 74 is a liquid crystal, and 75 is a reflecting plate, and the light emitting element 72'. Is used as a light source to reflect light passing through the liquid crystal, and the reflector plate 75 collects the light from the light emitting element 72 'so that the light is effectively incident on the light receiving element (A) 72 ".

In the figure, the light receiving element (B) for receiving the control signal is omitted. In the configuration shown in the figure, light from the light emitting element 72 ′ as a light source passes through the liquid crystal 74 and is reflected by the reflector
Reflected by 5 and transmitted through liquid crystal 74, light receiving element (A) 72 ″
Incident on. The reflector 75 is formed in a concave surface, and the light emitting element 7
The light incident from 2'is reflected by the reflecting plate 75 and is reflected so as to be condensed on the side of the light receiving element 72 ".

Therefore, according to the configuration shown in the figure, since the light is effectively collected by the light receiving element (A) 72 ", the accuracy with respect to the optical signal is improved. (B) is a semi-cylindrical shape and 75 is a reflection A cross-sectional view of the plate and 75 'are plan views of the reflecting plate.

(C) is a concave structure, 75 is a sectional view of the reflector, and 75 'is a plan view of the reflector. FIG. 7 shows an embodiment in the case of writing data according to the light amount of the present invention.

The figure shows an embodiment in which write data is determined by writing data according to the amount of emitted light by utilizing the fact that the amount of emitted light of the light emitting element can be controlled continuously (analogously).

In the figure, reference numeral 80 is a main body device, and 81 is a non-contact type IC memory card. In the main unit 80,
Reference numeral 82 denotes a light emission control unit that refers to the input write data by referring to the data / light quantity correspondence table 85 to obtain the light quantity corresponding to the write data so that the light emitting element (A) 84 emits light with the corresponding light quantity. To control. 8
A processor 6 controls the main body device 80. Reference numeral 87 denotes a light emitting power source unit, which is a light emitting element (A) 8
4 light emitting power source.

In the non-contact type IC memory card 81,
90 is a light receiving element (B). A data determination unit (B) 91 determines the write data according to the light amount received by the light receiving element (B) 90 by referring to the data-light correspondence table 93. A write control unit 92 writes the write data determined by the data determination unit (B) 91 into the memory 94. Reference numeral 93 is a correspondence table of data and light quantity. 94 is a memory. Reference numeral 95 is a processor that controls the non-contact type IC memory card 81.

The operation of the configuration shown in the figure will be described. The write data input unit 83 inputs write data of codes such as alphanumeric characters and letters. The light emission control unit 82 is controlled by the processor 86 to refer to the data light amount correspondence table 85 to obtain the light emission amount of the light emitting element (A) 84 corresponding to the input write data. Then, the light emission control unit 8
2 controls the voltage applied to the light emitting element (A) 84 so that the amount of emitted light corresponds to the input writing.

In the non-contact type IC memory card 81,
The light receiving element (B) 90 receives a light amount of light emitted by the light emitting element (A) 84 and corresponds to the write data, and converts it into an electric signal (voltage value or current value). The data determination unit (B) 91 refers to the correspondence table 93 between the data and the light amount, and determines the write data corresponding to the received light amount.
The write control unit 94 writes the write data determined by the data determination unit (B) 91 in the memory 94.

FIG. 8 shows an embodiment in the case of reading data according to the light quantity. The figure uses the fact that the amount of light transmitted through the liquid crystal can be controlled continuously (analogically), and the read data is associated with the amount of light received through the liquid crystal and written to the non-contact type IC memory card. This is a configuration for reading the stored data.

In the figure, reference numerals 80 and 80 'denote main body devices and 8
Reference numeral 1 is a non-contact type IC memory card. In the non-contact type IC memory card 81, 100 is a liquid crystal and 100 'is a light receiving element (B) for receiving a control signal sent from the main body device. A liquid crystal control unit 102 refers to a data / light quantity correspondence table 104 to obtain a light quantity corresponding to the data read by the read control unit 103 from the memory 105, and the light transmitted through the liquid crystal corresponds to the read data. The liquid crystal 100 is driven so that the light receiving element (A) 91 receives the light with the amount of light. A read control unit 103 reads data at a specified address from the memory 105 based on control data (a read instruction, an address, etc.). Reference numeral 104 is a data / light quantity correspondence table, 105 is a memory, and 106 is a processor, which controls the non-contact type IC memory card 81.

In the main body devices 80 and 80 ', 90 is a light emitting element, 91 is a light receiving element (A), and 92 is a data judging section (A), which is an electric device based on the light received by the light receiving element (A) 91. The read data transmitted from the signal is referred to by referring to the data / light quantity correspondence table 94. A data processing unit 93 processes the read data determined by the data determination unit (A) 92. Reference numeral 94 is a correspondence table of data and light quantity. 9
A processor 5 controls the main body device.

The operation of the configuration shown in the figure will be described. Light receiving element 90
Receives the control signal transmitted by light and converts it into an electrical signal. The read control unit 103 reads the data at the specified address from the memory 105 based on the read instruction and the address. The liquid crystal control unit 102 refers to the data / light intensity comparison table 104 to obtain the light intensity corresponding to the read data. Then, the light receiving element (A) emits light having a light amount corresponding to the read data transmitted through the liquid crystal.
The liquid crystal is driven so as to be incident on 91 (the display density of the liquid crystal is controlled). Drive with the corresponding analog value.

On the other hand, light having the light emitting element 90 as a light source passes through the liquid crystal 100. At this time, the transmitted light is attenuated according to the light emitting state of the liquid crystal (display density, etc.), and the light receiving element (A) 9
At 1, the light is received as a light amount corresponding to the read data. The light receiving element (A) 91 converts into an analog electric signal (voltage value or current value) according to the amount of received light and outputs it. The data determination unit (A) 92 refers to the data and light quantity correspondence table 94 to determine the received read data. The data processing unit 93 performs data processing based on the obtained read data.

[0075]

According to the present invention, since the IC card can transfer data without contacting the main body device, a connection terminal with the main body device is not required. Therefore, the terminals will not be corroded and the IC card will not become unusable.
It is possible to realize an IC card that can be used for a long period of time. Further, since the light receiving portion that receives the signal has a structure that blocks external scattered light, the signal transmission accuracy is good. Further, in the case of the reflection type, since the reflection plate has a structure that collects the reflected light, the optical signal is effectively collected in the light receiving element,
Data accuracy is improved. When the liquid crystal slit is composed of the liquid crystal itself, parallel transmission can be performed with a simple structure.
Furthermore, since the data is associated with the analog amount of light, the type of data that can be transmitted and the transmission speed are also increased. The amount of information that can be obtained can be greatly increased.

[Brief description of drawings]

FIG. 1 is a diagram showing basic configurations (1) and (2) of the present invention.

FIG. 2 is a diagram showing basic configurations (3) and (4) of the present invention.

FIG. 3 is a diagram showing basic configurations (5) and (6) of the present invention.

FIG. 4 is a diagram showing an embodiment (1) of the present invention.

FIG. 5 is a diagram showing an embodiment (2) of the present invention.

FIG. 6 is a diagram showing an embodiment (3) of the present invention.

FIG. 7 is a diagram showing an embodiment (4) of the present invention (when writing data according to the amount of light).

FIG. 8 is a diagram showing an embodiment (5) of the present invention (when reading data according to the amount of light).

FIG. 9 is a diagram showing a conventional non-contact type IC memory card.

[Explanation of symbols]

 1: Non-contact type IC memory card 2: Light emitting element (main device side) 3: Light-shielding part 4: Liquid crystal 5: Light receiving element (B) 6: Light receiving element (A) (main device side) 10: Light receiving element (A) (Main body side) 11: Non-contact type IC memory card 12: Light emitting element (main body side) 13: Light-shielding portion 14: Liquid crystal 15: Light receiving element (B)

Claims (5)

[Claims] 1. A light emitting element (2,12) and a light receiving element (A) (6,1)
(0) is inserted into the main unit and the light receiving element (B) (5,15)
In the non-contact type IC memory card system which is provided with the liquid crystal (4, 14) and exchanges data with the main unit by light, the light receiving element (B) of the non-contact type IC memory card (1)
(5,15) receives the control signal from the light emitting element (2) of the main unit or the optical signal of the write data.
The non-contact type IC memory card (1) has the light receiving element (B)
Light-blocking part that covers the upper part of (5,15) and blocks the scattered light from the outside
A non-contact type IC memory card system comprising (3, 13). 2. A light emitting element (2, 12) and a light receiving element (A) (10)
It is inserted into the main unit equipped with the light receiving element (B) (15) and the liquid crystal.
In the non-contact type IC memory card system that is equipped with (14) and exchanges data with the main unit by light,
4) is equipped with a reflector (16) on the side opposite to the light emitting element (12),
The reflection plate (16) reflects light transmitted through the liquid crystal (14) using the light emitting element (12) as a light source, and the light receiving element (A) (10) receives the optical signal reflected by the reflection plate (16), The main body is a reflective non-contact type IC memory card that receives data based on the display of the liquid crystal (14), and the reflection plate (16) emits reflected light from the light emitting element (12) as a light source to the light receiving element (A). ) A non-contact type IC memory card system having a structure of condensing light on the side of (10). 3. A light emitting element (12) and a light receiving element (A) (10) are inserted into a main body device, and a light receiving element (B) (15) and a liquid crystal (1) are inserted.
In the non-contact type IC memory card (1) that is equipped with 4) and exchanges data with the main unit by light, the liquid crystal (4, 14) is a slit that divides the light incident area using the light emitting element (2) as a light source. A non-contact type IC card memory card system, characterized in that the slit is formed by controlling the color of the liquid crystal itself in a region that transmits light and a region that does not transmit light. 4. The light receiving element (B) (15) and the liquid crystal (1) are inserted into a main body device having a light emitting element (12) and a light receiving element (A) (10).
In the non-contact type IC memory card (1) which is equipped with 4) and exchanges data with the main unit by light, the multi-valued data of the liquid crystal (4) can be written to or read from the non-contact type memory card (1). A non-contact type IC card memory card system characterized in that transmitted light amounts are associated with each other. 5. The main body device according to claim 4, wherein the main body device refers to the correspondence table (22) of data and light quantity in writing with the correspondence table (22) of data and light quantity, and A light emission control unit (20) for controlling the emitted light amount to a multi-value, and a multi-valued light reception signal received by the light receiving element (A) (6) during reading are stored in the data and light correspondence table (2
2) Refer to 2) Data judgment unit (A) (4)
2), the non-contact type IC memory card (1) has a data judging section (B) (30) for judging the content of data according to the amount of received light transmitted from the light emitting element (2) during writing, and for reading The data read from the memory (32) is referred to the data / light quantity correspondence table (33) to drive the liquid crystal so that the corresponding quantity of transmitted light is obtained.
0) and a non-contact type IC memory card system.