JPH031993A - Portable electronic device - Google Patents

Abstract

PURPOSE:To reduce the communicating time by storing data to be displayed and data not to be displayed in the same memory area, so that said data of a related pair can be handled all together by a communicating means. CONSTITUTION:A control element 11 retrieves a separating data S in a storing area 31 which stores a pair of data columns written by a communicating means including a contacting part 3, thereby to determine whether the separating data S is present. If the separating data S is not present, the control element 11 displays all the to-be-displayed data D1 which is the content in the area 31 in a liquid crystal display part 4, thus completing the procedure. If the sepa rating data S is present, however, the control element 11 determines whether the separating data S is at the front end of the area 31. In the case the separat ing data S is at the front end, the control element 11 decides that the to-be- displayed data is not present, therefore displaying nothing and completing the procedure. On the other hand, if the separating data S is not at the front end, the control element 11 displays the to-be-displayed data D1 preceding the separat ing data S in the liquid crystal display part 4, and then completes the procedure. Accordingly, the communicating time is able to be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the invention] (Industrial application field) The present invention is applicable to non-volatile data memory and
The present invention relates to a portable electronic device called an IC card, which has a built-in IC (integrated circuit) chip having a control element such as a U.

(Prior Art) In recent years, new portable data storage media have been developed, including erasable non-volatile data memory and communication devices that have built-in IC chips that have control elements such as CPUs that control them, and that communicate with the outside. A multifunctional type I with means, a keyboard for data entry, and a display for displaying the data.
C card has been developed.

This type of IC card accesses a data memory using a control element, and selectively inputs and outputs necessary data in response to a request from an external device via a keyboard or communication means.

(Problem to be Solved by the Invention) However, in conventional IC cards, display data that should be displayed must be stored separately in a display memory area, and hidden data that is not to be displayed must be stored separately in a non-display memory area. I had to. For this reason, when the communication means handles, for example, a set of display data and non-display data that are related to each other, there is a problem in that the data cannot be handled all at once, resulting in wasted communication time.

Therefore, the present invention allows a set of related display data and non-display data to be stored in the same memory area, so that the communication means can handle the related set of data at once. The purpose of the present invention is to provide a portable electronic device that can reduce communication time.

[Structure of the Invention] (Means for Solving the Problems) A portable electronic device of the present invention includes: a communication means for communicating with the outside; a memory section for storing at least one set of related data together with delimited data thereof; a display section for displaying and outputting data; a control section for controlling these; and a search means for searching for delimited data in the data stored in the memory section by accessing the memory section from the outside through the communication means. and a display control means for displaying and outputting data located in one direction from the delimiter data on the display section when delimiter data is found as a result of the search by the retrieval means.

(Function) For example, display data that should be displayed and hidden data that should not be displayed can be stored in the same memory area.
The communication means can handle a set of related data all at once, and communication time can also be reduced.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 4 shows the external appearance of a multifunctional IC card as a portable electronic device according to the present invention. That is, 1 is a card body, which is made of, for example, a rectangular thin plastic plate. A predetermined portion on the surface of the card body 1 is electrically connected to an integrated circuit (IC) 2 embedded in the card body 1, and for electrically communicating with an external device (for example, a terminal device, etc.) not shown. A contact section 3, a liquid crystal display section 4 for displaying input/output data, time, etc., and a keyboard 5 for data input are provided.

The keyboard 5 is provided with a numeric keypad, function keys, and the like. Further, a crystal oscillator 6 and a battery 7 for power supply are embedded within the card body 1.

FIG. 3 shows the circuit configuration of the above-mentioned IC card. That is, a control element (control unit) 11 such as a CPU is in charge of overall control, and this control element 11 includes the contact unit 3, the liquid crystal display unit 4, and the keyboard 5.
A data memory (memory unit) 12 that stores various data, a program memory 13 that stores processing programs for the control element 11, and a clock circuit 14 are also connected. 11,
The data memory 12, the program memory 13, and the clock circuit 14 are formed of one chip (or a plurality of chips) as an integrated circuit 2, and the integrated circuit 2 is supplied with operating power by a battery 7. .

Data memory 12 and program memory 13 are constructed of erasable nonvolatile memories such as EEFROM. Further, the clock circuit 14 generates date and time information by counting the reference clock output from the crystal oscillator 6.

For example, as shown in FIG. 2(a), the data memory 12 includes one set of display data (data to be displayed) Di, non-display data (data not to be displayed) D2, and delimiter data S for separating them. There are a plurality of data string storage areas 31 for storing the data strings.

The data string storage area 31 includes a display data storage area 31 in which display data D1 is stored, a delimited data storage area 312 in which delimited data S is stored, and non-display data D2.
and a non-display data storage area 313 in which data is stored, and can be read or written all at once from an external device by a communication means for communicating with the outside.

Note that the delimiter data S is, for example, 1 byte in hexadecimal notation, such as "FF11", and is fixed data.

Moreover, the display data D1 and the non-display data D2 have variable lengths, and the case where there is no display data D1 is shown in FIG. 2(b).
A case where there is no hidden data D2 and delimiter data S is shown in FIG. 2(c).

The program memory 13 stores processing programs for the control element 11, including a search process program for searching the delimited data S, a program for displaying data, and the like.

Next, the process of displaying the display data D1 in such a configuration will be explained with reference to the flowchart shown in FIG. First, the control element 11 stores a set of data string storage areas 3 written by a communication means including the contact section 3.
In step 1, the delimiter data S is searched (S1), and it is determined whether the delimiter data S exists (S2). As a result of this determination, if the delimiter data S does not exist, the control element 11 displays all of the display data D1, which is the content of the data string storage area 31, on the liquid crystal display section 4 (S3), and ends the process.

As a result of the determination in step S2, if the delimiter data S exists, the control element 11 next determines whether the delimiter data S exists at the beginning of the data string storage area 31 (
S4). As a result of this determination, if the delimiter data S exists at the beginning, the control element 11 determines that there is no display data, displays nothing (S5), and ends the process.

Here, "not displaying anything" means that driving of the liquid crystal display section 4 is stopped, or that a blank is displayed entirely on the liquid crystal display section 4.

As a result of the determination in step S4, if the delimiter data S is not present at the beginning, the control element 11 displays the data located before the delimiter data S, that is, the display data D1 on the liquid crystal display section 4 (s6); Finish the process.

The display data D1 is displayed as described above, and if the display data D1 does not exist and the delimiter data S is located at the beginning of the data string storage area 31, nothing is displayed.

In this way, only the display data can be displayed, and the communication means can handle the display data and the non-display data at once.

[Effects of the Invention] As detailed above, according to the present invention, a set of related display data and non-display data can be stored in the same memory area, so that the communication means can store the related sets of display data and non-display data in the same memory area. It is now possible to handle one set of data all at once,
A portable electronic device that can also reduce communication time can be provided.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, and FIG. 1 is a flowchart explaining display processing of display data, FIG. 2 is a diagram explaining a data memory, and FIG. 3 is a circuit configuration of an IC card. FIG. 4 is a perspective view showing the external appearance of the IC card. 3... Contact section (communication means) 4... Liquid crystal display section (display section) 5... Keyboard, 11... Control element (control section) 12... Data memory (memory section),
13...Program memory, 31...Data string storage area, 311...Display data storage area, 312...
Delimited data storage area, 313... Hidden data storage area, Dl... Display data, D2... Hidden data, S... Separated data. Applicant's agent Patent attorney Takehiko Suzue Figure 4

Claims (1)

[Claims] (1) A communication means for communicating with the outside; a memory section for storing at least one set of related data together with their delimited data; a display section for displaying and outputting the data; a control section for controlling these; and the communication means. a search means for searching for delimited data in the data stored in the memory section by accessing the memory section from the outside; and display control means for displaying and outputting data located in one direction on the display section.