JPH059943U - Information writing / reading system - Google Patents

Abstract

(57) [Abstract] [Purpose] The information content of the information storage unit can be directly known by the display unit provided in the information storage unit, and the display unit serves as the information storage unit serving as the signal source of the reading device. A writing and reading system using an information storage body is provided. [Structure] Information is written by a thermal writing section 2 to an information storage body 4 having a storage medium 10 using a material whose transmittance changes by heat, and the written information is used as a signal source of an optical reading section 2, and The display was visible. Input / output signals from these writing / reading devices are processed by the processing unit 1 in accordance with preset specifications.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an information writing / reading system using an information storage body having a display section that also serves as a signal source of a reading device.

[0002]

[Prior Art]

 Conventionally, there has been a storage medium using a magnetic material as a storage medium for information as seen in prepaid cards and the like. In a writing / reading system of a storage medium using such a magnetic material, writing and reading of information have been performed by a magnetic writing / reading device. Then, when the recorded information is changed, the information is rewritten.

[0003]

[Problems to be solved by the device]

 However, the conventional writing / reading system for the storage medium using the magnetic material requires the user to use a dedicated reading device in order to accurately know the information in the card. There is also a method of preprinting a limited number of types of information on the peripheral area of a card and punching out the information part of the printed area that is similar to the information on the card, but that information is roughly However, there is a drawback that it is not possible to know accurate information.

As a method for solving this drawback, a card in which a display device having another mechanism is further added to the information storage body is considered, but the disadvantage is that the card itself is not only complicated but also expensive. was there. In order to eliminate the above-mentioned drawbacks, the present invention enables the information content of the information storage body to be directly known by the display unit provided in the information storage body, and the display unit also serves as the signal source of the reading device. The object is to provide a writing / reading system using this information storage body.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides an information storage body using a recording material whose light transmittance changes thermoreversibly as a storage medium, and a form in which information can be directly visually observed by heating the information storage body. Information writing / reading, characterized by comprising a writing unit for inputting with the above, a reading unit for optically reading the information inputted in the information storage unit, and a processing unit for processing a read signal, a write signal and system specification contents. It is a system.

[0006]

[Action]

 As described above, the present invention provides a signal of a reading device that easily writes information to a storage medium that uses a material whose light transmittance changes by heating and cooling, and that optically reads the written information. In addition, the storage medium has the function of a visible display, and the information written in the storage medium is recognized by an optical reading device. It is easy to write and read the card, and the information on the card can be viewed directly at any time.

[0007]

First Embodiment FIG. 1 is a system diagram showing an embodiment of the present invention. Reference numeral 1 denotes a processing unit having a function of processing an input signal according to a preset purpose of specification within the range of system specifications and outputting it as an output signal. The reading unit 2 and the writing unit 3 are connected to the processing unit 1, and the reading unit 2 processes the information written in the information storage body 4 such as a telephone card and a prepaid card. The processed information is rewritten by the writing unit 3.

In the reading unit 2 of FIG. 1, a light source 5 and a light receiving sensor 6 are installed to face each other, and a roller 8 for conveying the information storage body 4 is provided between the light source 5 and the light receiving sensor 6. . Further, the writing unit 3 is provided with a hot pen 7 such as a thermal head for writing information by partially heating the information storage body 4, and the information storage body 4 is attached to the hot pen 7. A roller 8 for transporting is provided.

As shown in FIG. 2, the information storage body 4 is composed of a transparent substrate 9 such as a polyester film, a polyimide film, or a glass plate at least in a portion for sandwiching the storage medium 10. FIG. 2 shows an example in which the storage medium 10 is sandwiched between the substrates 9 as the structure of the information storage body 4, but the storage medium 10 may be coated on one substrate 9. Thermoreversible materials used for the storage medium 10 are disclosed, for example, in JP-A-61-258853, Kagaku to Kogyo 42 (4) (1989), page 470, and Japanese Patent Application No. 3-22379. , All known thermoreversible materials can be used.

JP-A-61-258853 discloses a two-component polymer blend or a three-component blend having a lower critical solution temperature (LCST) phase diagram as a thermoreversible material. It has been described and specific examples of the two-component system include vinyl chloride-alkyl acrylate, alkyl (meth) acrylate-vinylidene fluoride system, styrene-alkyl vinyl ether, alkyl acrylate-vinyl acetate and the like. In the above-mentioned chemistry and industry, as a thermoreversible material, a mixture of vinylidene chloride-acrylonitryl copolymer and docosanoic acid, a mixture of vinylidene fluoride-hexafluoroacetone copolymer and methyl methacrylate low molecular weight substance, poly (1,4-benzenthiol-co-1,4-divinylbenzene) and the like are mentioned. Further, Japanese Patent Application Laid-Open No. 3-22379 filed by the applicant of the present invention describes a mixture of polyvinyl butyral and saturated carboxylic acid or its derivative as a thermoreversible material.

FIG. 3 shows the relationship between the temperature and the light transmittance of the thermoreversible material as an example of the thermoreversible material that can be used for the storage medium 10 of the present invention. When the storage medium 10 which is optically opaque at room temperature is heated as shown by the curve a, the temperature T₁The transmittance starts to increase from the temperature T₂(T₁<T₂) Is the maximum transparent state. So the temperature T ₂ When it is further cooled to room temperature, it is cooled while maintaining a transparent state as shown by the curve b. Next, to return from the transparent state to the opaque state, the melting point T of the low molecular weight material₃(T₂<T₃ ) And then cooled to room temperature, it gradually returns to an opaque state as indicated by curve c.

Next, a method of writing information in the information storage body 4 will be described. The information processed by the processing unit 1 is sent to the writing unit 3. The minute portion of the opaque storage medium 10 is heated to the temperature T ₂ shown in FIG. 3 by the heating pen 7 including a thermal head or the like provided in the writing section 3 to bring the optical transmittance to the maximum transparent state. From that state, the temperature is cooled to room temperature, and only the minute portion of the heated storage medium 10 is set to the maximum transmittance state to create a difference in transmittance with the non-heated portion. For the writing, the information sent from the processing unit 1 is written in dots on the storage medium 10 while the information storage body 4 is conveyed by the rollers 8.

This information is configured as a dot matrix, and is composed of characters such as numbers, letters, and kanji so that the user can read it. The user can directly read the information memory 4 by reading the information written by the difference in the transmittance between the written portion and the unwritten portion. That is, the storage medium 10 has not only a writing / reading function but also a display function. For example, the prepaid card displays the balance or the amount used, and the on-board payment for trains and buses displays the destination and the amount.

Next, a method of reading information from the information storage body 4 will be described. As shown in FIG. 1, while the roller 8 conveys between the light source 5 and the light receiving sensor 6, the light source 5 emits light, transmits the storage medium 10 of the information storage body 4, and receives the transmitted light. Received by sensor 6. The difference in optical transmittance of the information storage body 4 is read and sent to the processing unit 1 to process the contents of the information recorded in the information storage body 4 to prompt the user to make a decision.

Although the method of using the transmitted light from the light source 5 to read the information written in the storage medium 10 has been described, a reflection plate may be provided below the storage medium 10 to use the reflected light. Then, when the user uses it again, the information read by the difference in the transmittance of the storage medium 10 by the light source 5 and the light receiving sensor 6 provided in the reading unit 2 is processed by the processing unit 1. After using, new information is rewritten in the writing unit 3.

[0016]

[Effect of the device]

 As described above in detail, according to the present invention, the user always has the information storage body 4 and directly views the information content of the information storage body 4 on the display provided in the information storage body 4. Since the display unit also serves as a signal source for the reading unit, the information storage unit 4 can be provided at a low cost because it is not necessary to separately provide the display unit and the storage medium 10.

[Brief description of drawings]

FIG. 1 shows an information writing / reading system of the present invention.

FIG. 2 is a plan view of an information storage body used in the present invention.

FIG. 3 is a characteristic diagram of a thermoreversible material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing part 2 Reading part 3 Writing part 4 Information storage body 5 Light source 6 Light receiving sensor 7 Thermal pen 8 Roller 9 Substrate 10 Storage medium

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location G11B 7/00 Q 9195-5D

Claims (1)

[Claims for utility model registration] Claims (1) An information storage body using a recording material whose light transmittance changes thermoreversibly as a storage medium, and (2) heating information to the information storage body. (3) a reading unit that optically reads the information input to the information storage body, and (4) a processing unit that processes read signals, write signals, and system specification contents. An information writing / reading system characterized by consisting of.