JPS60101685A - Platelike memory medium - Google Patents

Abstract

PURPOSE:To make reading of information possible by providing a means in which a platelike memory medium incorporating a semiconductor memory unit having a terminal that makes transmitting and receiving of data on the surface of substrate displays stored memory by an external switch. CONSTITUTION:A liquid crystal panel 2 that displays information is provided at the center of upper face of the substrate, and a power source switch 3 that makes and breaks power source and a key switch 4 that switches the content of display are provided in the lower part, and contact pins A-H connected to an external writing and reading device is provided on the back. A one-chip microcomputer 5 incorporated in the substrate controls the whole device, and displays stored information on a liquid crystal display panel 2 by operation of the key switch 4 provided on the surface of the substrate. Contact pins C, D transmit and receive data from the writing and reading device through a serial parallel interface 8. By this way, when used for a cash card etc., receipt and expenditure etc. can be confirmed at a look, and the use of the card can be made more convenient.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a plate-shaped storage medium incorporating a semiconductor storage circuit.

(Prior art) Due to recent advances in semiconductor technology, card-like storage media that use semiconductor storage circuits such as RAM and EEPROM, which can be read and written, have been put into practical use as cash cards and credit cards in place of magnetic cards. I am trying to do.

By the way, it has been reported that such a storage medium is inconvenient because the information written thereon cannot be read unless it is set in a dedicated reading device and the data is printed out.

(Objective) In view of the above problems, an object of the present invention is to provide a plate-shaped storage medium in which written information can be read without using a special device.

That is, the feature of the present invention is that a semiconductor memory circuit and a display device for displaying data stored therein are integrated into a plate shape.

(Structure) Therefore, details of the present invention will be described below based on illustrated embodiments.

FIG. 1 shows an embodiment of the present invention, in which a liquid crystal panel 2 for displaying information stored in a semiconductor memory circuit is mounted at the center of the upper surface of a substrate l incorporating a signal processing circuit to be described later.
At the bottom, a power switch 3 for turning the power ON and OFF and a key switch 4.4 for changing the display contents are arranged, and on the back side, contact pins A-H for connecting to the writing/reading device are arranged. has been done.

FIG. 2 is a block diagram of a circuit showing an embodiment of the above-mentioned signal processing circuit, in which reference numeral 5 is an l-chip microcomputer, which receives signals from contact pins A and B, and a display control circuit to be described later. A CPU 5a that operates based on a signal from 7 and an RO that stores a control program.
It consists of an M5b and a RAM5c forming a register, and is configured to be connected to other circuits via a data bus 6 and to control the entire device. 7 is the display control circuit mentioned above, which outputs the code (a) by operating the key switch 4.4 provided on the surface of the board l.
It is configured to control the chip microcomputer 5. Reference numeral 8 denotes a serial/parallel interface for transmitting and receiving data to and from the writing/reading device via contact pins C and D, and is configured to convert data from the writing/reading device into serial/parallel data. Reference numeral 9 denotes a semiconductor memory circuit such as an EEFROM for storing data, which is configured to write and read data and output it to the data bus 6 by a memory control circuit 10 that is controlled by signals from an l-chip microcomputer. There is.

Reference numeral 11 denotes a display driver 8, which converts data read from the EEFROM 9 by the L-chip microcomputer 5 into a character pattern signal and outputs it to the liquid crystal display panel 2 as visible information.

Note that the reference numeral 12 in the figure indicates a battery that is connected to the power supply terminals F and H via the power switch 3 and supplies operating power to the signal processing circuit.

In this embodiment, the card is set in a card write/φ reader (not shown), and necessary information is written into the semiconductor memory circuit 9 via the serial/parallel interface 8. When confirming the information on the plate-shaped storage medium in which information has been written in this way, turn on the power switch 3 provided on the surface of the card, and the internal circuitry will receive power from the battery 12 and become operational. . At this point, key switch 4.
4, a code signal from the display control circuit 7 enters the one-chip microcomputer 5, activates the semiconductor memory circuit 9, and displays one play of stored information via the data bus 6. The data is output to the driver 11 and displayed on the liquid crystal panel 2 as shown in FIG. If the key switch 4.4 is further operated at this stage, information is read out plane by plane from the semiconductor memory circuit 9 and displayed one after another on the panel, allowing all information in the semiconductor memory circuit 9 to be displayed on the card surface. can.

Note that in this embodiment, an EEPR is used in the semiconductor memory circuit.
Although OM is used, the same effect can be achieved even if the RAM is backed up by a battery. Further, in this embodiment, a liquid crystal panel is used as the display device, but a single light-emitting array can also be used.

(Effects) As explained above, according to the present invention, the display panel is provided on the surface of the plate-shaped storage medium to display the stored contents, so that the stored data can be displayed on the display panel as needed. For example, when used as a cash card, deposits, expenditures, etc. can be checked at a glance, just like a passbook, making the card more convenient to use.

[Brief explanation of the drawing]

Figures 1 (A) and (B) are external views of a device showing one embodiment of the present invention, Figure 2 is a block diagram of the device showing the configuration of the device, and Figure 3 is a block diagram of the device. FIG. 3 is an explanatory diagram showing an example of an operating state. l...Substrate 2...1 LCD panel 4...Key switch 5...l Chip microcomputer A-H...
・Contact pin applicant Tokyo Tatsuno Co., Ltd. Agent Patent attorney Keiji Nishikawa Katsuhiko Kimura

Claims (1)

[Claims] In a plate-shaped storage medium comprising at least a built-in semiconductor storage means, a terminal for connecting with an external device to transmit and receive data is provided on the surface of the substrate, and data stored in the semiconductor storage means is read out by an external switch means. A plate-shaped storage medium characterized in that display means for displaying information is provided on the surface of the substrate.