Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – In combination with or also constituting light responsive...
Patent
1996-11-18
1998-06-16
Tran, Minh-Loan
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
In combination with or also constituting light responsive...
257 81, 34082549, 34082554, H01L 2715, G08B 522
Patent
active
057675325
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
This invention relates to a retrieved material management system for managing retrieval materials or objects such as files and so on.
BACKGROUND ART
Traditionally, in case where the number of retrieval objects such as files is large, those retrieval objects are typically classified by their species to be stored. Usually, searching operation for a desired one from the retrieval objects is carried out by manual operation.
On the other hand, development has been recently made of retrieval object managing and retrieving systems which are capable of storing a plurality of retrieval objects and retrieving a desired retrieval object therefrom by simply inputting data relating to the retrieval object in question.
As examples of the known retrieval object managing and retrieving systems, an individual retrieval device for retrieval objects such as files is disclosed in Japanese Unexamined Patent Publication No. 98067/89 (hereinafter called Reference 1) and a file retrieval system is disclosed in Japanese Patent Publication No. 48877/91 (hereinafter called Reference 2).
The individual retrieval device for retrieval objects of Reference 1 comprises a plurality of transmitters connected to a computer body. Each of the transmitters transmits a digital signal corresponding to a peculiar address of each of the retrieval objects. Each of a number of the retrieval objects is directly or indirectly provided with a receiver for receiving each digital signal thus transmitted. Each of the retrieval objects is further provided with an indicator for externally indicating the fact that its receiver receives the digital signal corresponding to the peculiar address assigned thereto. Thus, presence of a desired retrieval object selected by the computer from a number of the retrieval objects is recognized by indication at the indicator of the retrieval object. With this structure, it is possible to quite easily search out the desired retrieval object among a number of the retrieval objects in comparison with the manual operation.
As regards the individual retrieval device for the retrieval object disclosed in the above-mentioned Reference 1 however, the receiver attached to each of the retrieval objects is required to have an electronic circuit including a microcomputer memory for memorizing the digital signal assigned thereto, a communication circuit, and a power supply section for carrying out power supply to these components. Therefore, a number of the retrieval objects require a corresponding number of the receivers to be attached thereto so that the cost becomes relatively high. Furthermore, a lot of time and labor is required not only for maintenance but also for replacing operation in case of failure of the receiver.
In the file retrieval system of Reference 2, a master retrieval unit sends out, as an ultrasonic signal, data of a retrieval file number inputted by a retriever. A retrieval medium attached to each file as a retrieval object compares the retrieval file number data obtained by receiving this ultrasonic signal with data of a peculiar file number preliminarily assigned to each file as a slave side, and lightens only upon coincidence an indicating part attached to the retrieval medium to perform an indication. This enables to recognize the position of the desired file.
In the above-described file retrieval system, it is required neither to provide any special structure as a shelf for storing the files, nor to arrange the files in a numerical order or with their backs aligned in an aligning line. Therefore, this system is convenient in management even with a large number of the files.
In the file retrieval system disclosed in the above-described Reference 2, however, the retrieval medium must have an electronic circuit similar to that of Reference 1 because an ultrasonic wave is used, although it is advantageous in free arrangement of the files.
Reference 2 is advantageous in that no power supply line is required because a solar battery is used as a power supply of the electronic circuit. However,
REFERENCES:
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JP, 1-98067, A (Asahi Denshi Kenkyusho K.K.) Apr. 17, 1989.
JP, 7-225776, A (Kongo K.K.), Aug. 22, 1995. (Family: None).
Izuno Masaharu
Nishiguchi Mitsuharu
Itoki Crebio Corporation
Tran Minh-Loan
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