JPS62188028A - Control system for optical memory division access - Google Patents

Abstract

PURPOSE:To inhibit information from being read out of and written in an optical memory except corresponding areas and to protect the optical memory by transmitting light through only a block indicated selectively in a liquid crystal block group. CONSTITUTION:A card 6 mounts a processor 61 on its base body 64 and has an IC module 65 where passwords of liquid crystal 63 by blocks are stored, a solar cell 66, and a memory 62 whose surface is covered with the liquid crystal blocks. When the card 6 is inserted into a device 5, a control part 2 receives the password signal CS2 of, for example, a #2 block 632 with a signal S0 and inputs it to the processor 61 on the card through the interface 51 of the device 5. The processor 6 generates a signal S12 when the signal coincides with the specific password of the module 65 and the device 5 indicates readout preparations S22 to a head 52 with the signal S12. Further, the processor 61 applies a specific voltage O2 to make the liquid crystal 632 transparent and reads information D2 out of the block 632 of the memory 62 to send it to the memory 62 through the interface 51. The control part 2 sends an end signal to the processor 61 at the end of the processing 3 and the processor 61 applies a voltage C2 to make the block 632 opaque.

Description

[Detailed Description of the Invention] [Summary] The present invention provides an optical card (6) that is equipped with a microprocessor (61) and covers an optical memory (62) with a liquid crystal (63) that can control the transmission of light. The liquid crystal block (63,,63!,...,63i
, ..., 63n), and the microprocessor (
61), the liquid crystal block (63, 6
3□,...,63i.

..., 63n), the microprocessor (61) selects only the liquid crystal (63i) of the block area specified by the selection instruction.
control to transmit light and prevent reading and writing of information stored in the optical memory (62) other than those corresponding to the area,
This is a divided access control method that guarantees the security of information in optical memory.

[Industrial application field]

In recent years, ICs (ICs) equipped with integrated circuits with large storage capacities have replaced magnetic cards with magnetic stripes, such as credit cards used for transactions at counters at financial institutions and for payments at mass retailers. Integrated C
1rcuit) cards and laser cards equipped with optical storage media have become popular.

[Conventional technology]

Since the above-mentioned laser card has a large-capacity memory in a small volume, it is convenient in size and easy to carry around, and has the advantage that individuals can easily use it for their own financial transactions. However, the above laser card has a structure in which the information recording layer is exposed to the outside. And since it can be easily handled by anyone using a dedicated reading device,
It became possible for individuals to freely trade their deposits and purchase goods at any time or place, and there was a risk that if they were lost or stolen and fell into the hands of another person, they could easily be misused.

In order to prevent the above-mentioned danger, the present inventor has proposed, in a separately filed invention, a laser card in which the upper layer of the optical memory is coated with a liquid crystal that can control the transmission or non-transmission of light.

[Problem that the invention seeks to solve]

5 and 6 are explanatory views of a laser card whose surface layer is coated with the above-mentioned liquid crystal, FIG. 5 is a perspective view of the laser card, and FIG. 6 is a schematic view of the laser card at the time of access.

In the figure, 60 is a laser card equipped with a liquid crystal, 620 is an information recording unit, 65 is an IC module with a built-in microprocessor, 66 is a solar cell, 50 is a laser card reader, 62 is an optical memory, 63 is a liquid crystal, 64 is the card base.

The above laser card 60 has a card base 64 as a part thereof.
It has an information recording section 620 consisting of three layers: an optical memory 62 and a liquid crystal 63, and is configured as shown in FIG. 6 described above.

Therefore, when reading the laser card 6o, the user inputs, for example, personal authentication using an input section (not shown). This personal authentication is verified by a microprocessor installed in the IC module 65, and when a match is found, the liquid crystal 63 is controlled to allow light to pass through.

Therefore, the entire area of the optical memory 62 is opened for reading, and if the original reading address is misidentified, undesired data may be read out, or in the case of a writable type laser card, the reading/writing device There was a risk that all data would be destroyed if there was a failure on the other side.

[Means for solving problems]

In order to solve the above problems, the present invention has a laser card (62) equipped with an optical memory (62), equipped with a microprocessor (61), and coated with a liquid crystal material (63) that can control the transmission of light. 6), which are controllably divided liquid crystal substances (63+, 63g, . . . , 63i, . . .
, 63n) are arranged facing the optical memory (62).

[Effect]

In order to have the above configuration, the liquid crystal material (63i) is switched to a light transmitting state or a light non-transmitting state for each divided liquid crystal block to which a control signal (for example, voltage application level control) from the microprocessor (61) can be applied. This ensures that information can be read and written from the optical memory (62) for each block.

〔Example〕

The present invention will be described in detail below using FIGS. 1 to 4.

FIG. 3 is an external view of the laser card according to the present invention. The laser card 6 is equipped with a microprocessor 61 and each liquid crystal block (63, 63□, 633.631.63&
, 636) IC module 65 equipped with a memory section (not shown) that stores another password, a solar cell 66, and a liquid crystal block (631, 63 □ 633.63 m, 63 s, 6
An optical memory 62 whose upper layer surface is covered with 36) is disposed, respectively, and a card base 64 is laminated at the bottom layer.

Next, the principle operation of the present invention will be explained. FIG. 4 shows the operating state of the laser card 6. In the figure, (a) and (C1 is an opaque liquid crystal block (closed state), numbers in the figure) show a transparent liquid crystal block (open state).

The laser card 6 is composed of three layers: a liquid crystal 63 on the top layer, an optical memory 62 on the middle layer, and a card base 64 on the bottom layer.The liquid crystal 63 has a vertical molecular lattice (Fig. horizontal molecular lattices (al, (C
)).

Such vertical or horizontal arrangement control of the molecular lattice may be included in the command signal of the microprocessor 61 for operation.

Next, access control according to the present invention will be explained.

FIG. 1 is a functional diagram explaining divided access control of the present invention.

In the figure, 1 is a password input section, 2 is a control section, 3 is a processing section, and 4
5 is a memory, 5 is a laser card writing/reading device, 51 is an interface, 152 is a writing/reading head, 6 is a laser card, 61 is a microprocessor, 62 is an optical memory, 63. -633 are liquid crystal blocks, and 7 is a file device.

The operation of the present invention based on the above configuration is the procedure shown in FIG. 2, which is a diagram showing the opening and closing procedure of the liquid crystal in reading the individual liquid crystal blocks.

This will be explained below with reference to FIGS. 1 and 2.

■ When the laser card 6 is inserted into the writing/reading device 5,
A laser card insertion signal SO from a sensor (not shown) provided in the writing/reading device 5 is output to the control section 2 .

■ The control unit 2 waits for the password input unit, and for example, when selecting the second (63□) of the liquid crystal block, the password input unit l
A password input signal CS t is inputted from the PC, and this password input signal C82 is manually inputted to the microprocessor 61 of the laser card 6 via the interface 51 of the writing/reading device 5.

■ The microprocessor 61 checks the predetermined password stored in the IC module 65 (a password (not shown) prepared in advance for each individual liquid crystal block), and
When the passwords match, a reading start preparation signal S1□ is output to the writing/reading device 5.

(2) When the writing/reading device 5 receives the reading start preparation signal S12, it instructs the writing/reading head 52 in the device to prepare for reading S2□.

■ When the above-mentioned passwords match, the microprocessor 61 controls the application of a predetermined voltage 02 that switches the liquid crystal 63□ to a light transmitting state (liquid crystal open processing), outputs a reading start command R2, and controls the optical memory 62. Data D is read from the area corresponding to the liquid crystal block 632.
Outputs 2.

(2) The writing/reading device 5 sends the data D2 flowing into the reading head 52 to the memory 4 via the interface 51.

(2) When all desired data has been read out and the processing is completed in the processing section 3, a completion signal E is output from the control section 2 to the writing/reading device 5.

■ The writing/reading bag TL5 notifies the microprocessor 61 of the laser card 6 of the completion signal E via the interface 51, and the microprocessor 61 sends the liquid crystal block 63. The application of the voltage Ct is controlled so as to switch the state to the light-opaque state a (liquid crystal closing process).

As described above, in the laser card 6 according to this embodiment, a password is set for each individual liquid crystal block, and a liquid crystal block is selected according to the input of the password to allow light to pass through. Here, block selection has been described as using a password, but other means may be used instead. In addition, although the molecular lattice of individual liquid crystal blocks has been explained in terms of a vertical and horizontal lattice structure, the present invention is not limited to devices with such a molecular lattice, and optical cards made of materials whose light transmission/non-transmission can be controlled. Any material may be used as long as it covers the recording layer of the device and allows access to the individual data area in response to confirmation by the personal authentication means.

Although not particularly shown in this embodiment, a light emitting means for supplying electromotive force to the solar cell 66 of the laser card 6 may be appropriately provided on the writing/reading device 5 side.

〔effect〕

As described above, the laser card according to the present invention allows the user to classify and record data according to the field desired by the user in each individual area, and since the data cannot be easily read by others, security is guaranteed. can be significantly improved,
It can contribute to the use of large-capacity personal data files that ensure privacy.

[Brief explanation of drawings]

Fig. 1 is a functional diagram explaining the reading control of the present invention, Fig. 2 is a procedure diagram of microprocessor processing (especially during reading),
Fig. 3 is an external view of the laser card according to the present invention, Fig. 4 is a diagram showing the operating state of the laser card, Fig. 5 is a perspective view of a conventional laser card, and Fig. 6 is a schematic diagram of the conventional laser card during reading. It is a diagram. In the figure, 1 is a password input section, 2 is a control section, 3 is a processing section, and 4
5 is a memory, 5 is a laser card indentation/reading device, 51 is an interface, 52 is a writing/reading head, 6 is a laser card, 61 is a microprocessor, 62 is an optical memory,
63 is a liquid crystal, 631 to 636 are liquid crystal blocks, 64 is a card base, 65 is an IC module, and 66 is a solar cell. Processing diagram of microprocessor Figure 2: Unidentified card 9 Figure 5 11 Closing of the conventional Shiza card t-first drawer door Figure 6

Claims (1)

[Claims] An information recording medium (6) equipped with an optical memory (62), equipped with a processing device (61), and coated with a shielding material (63) that can control the transmission of light; 63_1, 63_2, ..., 63i, ..., 6
3n) are arranged facing the optical memory (62), and under control from the processing device (61), light is transmitted through the shielding material (63i) of the divided region selected from the shielding material (63). The optical memory divided access control method is characterized in that only the area corresponding to the area through which the light is transmitted is accessed within the area of the optical memory (62).