JPH0236494A - Portable electronic device - Google Patents

Abstract

PURPOSE:To display even data exceeding the display-outputting capacity of a displaying part by providing a display controlling means to display-output the data as scrolling it according to the operation of a keyboard. CONSTITUTION:When a CPU 27 reads the data from a data memory 30, if the number of digits of the data exceeds the number of digits capable of displaying, the CPU 27 displays the data of the portion of the number of digits capable of displaying on a liquid crystal display part 4, and turns into a key input waiting state. When an adding key, for instance, in the keyboard 5 is pushed down in the key input waiting state, it scrolls displayed contents to the left, and when a subtracting key is pushed down, it scrolls the displayed contents to the right. Thus, even the data exceeding the display-outputting capacity of the displaying part can be easily displayed.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is used, for example, as a credit card in a shopping system, and has multiple functions such as a transaction function, a clock function, a calculator function, and an electronic note function. The present invention relates to a multi-functional portable electronic device called an IC card.

(Prior Art) In recent years, as a new portable data storage medium, an IC card has been developed that has a built-in IC chip that has an erasable nonvolatile memory and a control element such as a CPU that controls it. It is intended to be used for transactions, etc.

This type of IC card outputs necessary data in response to a request from an external device (such as a terminal device) by accessing a built-in memory using a built-in control element.

Furthermore, in recent years, cards have built-in batteries, are equipped with keyboards and displays, and can operate offline without being connected to a terminal device. A multi-function type IC card driven by notebooks has also been developed.

Conventionally, in the case of multi-functional IC cards like this, the length of data that can be displayed on the display section has been limited to less than the number of display digits (capable display output amount); It was not possible to display this data.

Further, the length of the data displayed on the display section was fixed, and the data stored in the memory was also fixed length. Therefore, this type of IC card can always display only a certain length of data.

(Problems to be Solved by the Invention) The present invention has been made to solve the problem that it is impossible to display data exceeding the display output capacity of the display unit as described above. An object of the present invention is to provide a portable electronic device that can easily display data that exceeds the display output capacity of the device.

[Structure of the Invention] (Means for Solving the Problems) A portable electronic device of the present invention includes a memory section for storing data, a keyboard for inputting data, etc., and a memory section for inputting data with the keyboard or the memory section. a display unit that displays and outputs data stored in the display unit; and a control unit that controls these; when the data to be displayed and output to the display unit exceeds the display output capacity of the display unit, based on the operation of the keyboard; A display control means for scrolling and displaying the data is provided.

(Function) When the data to be displayed on the display unit exceeds the display output capacity of the display unit, the display output capacity of the display unit can be reduced by providing a display control means that scrolls and displays the data based on keyboard operations. It is now possible to easily display data that exceeds .

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

Figure ': A5 shows the external appearance of a multifunctional IC card, which is used as an example of a credit card for shopping transactions, as an example of a portable electronic device according to the present invention. This IC card can be used both online and offline; for example, IU
A transaction function that allows you to process transactions with i's transaction account, a clock function that displays date and time information, a calculator function that performs at least four arithmetic operations, and an address that allows you to register and read your name, telephone number, etc. It has electronic note functions such as display and output.

In FIG. 5, reference numeral 1 denotes a card body, which is made of, for example, a rectangular thin plastic plate. An integrated circuit (
A contact section 3 that is electrically connected to the IC) 2 and electrically communicates with an external device (such as a terminal device) not shown.
, a liquid crystal display section 4 for displaying input/output information, date information, time information, etc., and a keyboard 5 are provided.

Further, a battery 6 for power supply is embedded within the card body 1.

The keyboard 5 has a trading account key 7 for specifying a trading account.
8, 9, 10, numeric keypad 11, addition key 12 as four arithmetic operation keys, subtraction key 13, division key 14, multiplication key 1
5, a decimal point key 16, an equal key 17, etc. are provided.

The transaction account key 7 specifies a first operation (transaction processing) for a first transaction account (e.g., a first credit card), and the transaction account key 8 specifies a first operation (transaction processing) for a first transaction account (e.g., a second credit card); ),
The transaction account key 9 specifies a third transaction for a third transaction account (for example, a first CanYu Card), and the transaction account key 10 specifies a third business for a fourth transaction account (for example, a second CanYU Card). The fourth task is designated.

Note that the numeric keypad 11 is also used, for example, as a key for inputting English characters, and the equal key 17 is also used as a start key (power-on key).

FIG. 4 shows the circuit configuration of the integrated circuit 2. As shown in FIG.

That is, 21 is a communication control circuit, 22 is a recent control circuit, 23 is a right source control circuit, 24 is a battery check circuit for checking whether the voltage of the battery 6 is above a specified value, and 25 is a clock. ill (8 circuits, 2
6 is an oscillator that generates a clock with a frequency of, for example, IMHz, and 27 is a CPU as a control unit that controls the overall control.
(central processing unit), 28 is a program memory consisting of a mask ROM etc., 2 is a program working memory, 30 is a data memory (memory section) consisting of a non-volatile memory such as an EEPROM, 31 is a processing 32 is a clock circuit unit that generates date information and time information; 33 is an oscillator that generates a clock with a frequency of 32.768 KI (z); 34 is a display control circuit; A display driver 36 for driving the liquid crystal display section 4 is a keyboard interface circuit serving as an input circuit for the keyboard 5.

Communication control circuit 21, pantry check circuit 24, CPU
27, a program memory 28, two program working memories, a data memory 30, a timer circuit 31, a clock circuit section 32, a display control circuit 34, and a keyboard interface circuit 36 are connected by a data bus 37.

The communication control circuit 21 operates in the online mode, and converts serial data supplied from a terminal device or the like via the contact section 3 into parallel data and outputs it to the data bus 37 or parallel data supplied from the data bus 37. The parallel data is converted into serial data and output via the contact section 3 to a terminal device or the like.

The reset control circuit 22 operates in the online mode, and is configured to accept a reset signal supplied from a terminal device or the like via the contact section 3 and start up the CPU 27 .

When the power supply control circuit 23 enters the online mode, the external type I! i
, (supplied from the terminal device etc. via the contact part 3), and when the offline mode is entered, that is, when the voltage of the external power supply decreases, the control switches from the drive by the external power supply to the drive by the battery 6. It is now possible to do this.

In the offline mode, the clock control circuit 25 stops the operation of the oscillator 26 that generates a clock of 1 to 4 Hz when the key input waiting state is 1 (in standby mode), and
7 is also stopped, making it completely stopped. In this state, when the start key 17 is turned on, the oscillator 26 is operated and the clock circuit section 3
A clock of 32.768 KHz output from the oscillator 26 is supplied to the CPU 27, and when the next key operation is performed after the start key 17 is turned on, the IM clock output from the oscillator 26 is supplied.
A Hz clock is supplied to the CPU 27. Further, in the online mode, by supplying a reset signal from the reset control circuit 22, a clock supplied from a terminal device or the like via the contact section 3 is supplied to the CPU 27.

The program memory 28 includes a transaction function program, a clock function program, a computer function program, an electronic notebook a.
performance programs, other programs, etc. are memorized. The CPU 27 selectively executes programs in the program memory 28 to perform processing, thereby selectively operating a transaction function, a clock function, a calculator function, an electronic note function, and the like.

The data memory 30 stores transaction account information corresponding to the first to fourth transaction accounts described above, and when the transaction account keys 7 to 10 are pressed, the corresponding transaction account information is selected, and the transaction The corresponding business trip is executed based on the account information.

Further, the data memory 30 has an area for an electronic notebook, and data such as an address, a name, a city number, etc. are stored in this area. In a specific area of the data memory 30, expiration date information for determining the expiration date and password information (PIN number) for confirming the authenticity of the cart holder are stored in advance.

The clock circuit section 32 receives 32.7 output from the oscillator 33.
By dividing the 68KHz clock, 1sec
A frequency dividing circuit 321 that generates a clock, this frequency dividing circuit 3
By counting the clocks generated from 21,
It is composed of first and second clock circuits 322 and 323 that generate date information and time information. The first clock circuit 322 is a display clock circuit that allows the card holder to freely set and change date information and time information by operating the keyboard 5. The second clock circuit 323 is a clock circuit in which date information and time information are set, for example, when the card is issued, and the settings cannot be changed thereafter unless the validity of the operation is proven through a specific procedure.

The display control circuit 34 converts the display data supplied from the CPU 27 into a character pattern using a character generator (not shown) configured with an internal ROM, and displays the character pattern on the liquid crystal display unit 4 via the display driver 35. It has become.

Next, in such a configuration, the case where data stored in the data memory 30 is displayed and output based on the operation of the keyboard 5 will be explained using a flowchart of a routine including scrolling shown in FIG. 1.

Consider a case where a process for displaying and outputting data in the data memory 30, for example, an electronic note function is selected by operating the keyboard 5. Note that the electronic notebook function is selected by, for example, pressing the activation key 17 and then pressing a specific key on the keyboard 5. Here, the electronic note function allows data to be displayed by scrolling. Whether or not to scroll the data display is determined for each processing function. The electronic note function scrolls and displays data, but another function, such as a trading function, may not scroll and display data.

Now, when the electronic note function is selected, the CPU 27
Data is read from the electronic notebook area of the data memory 30. Here, it is assumed that the number of digits displayed on the liquid crystal display section 4 is, for example, 16 digits, and the range of one data to be displayed is, for example, a maximum of 21 digits.

For example, as shown in Figure 3, the maximum number of digits (21
In the case of data having fewer digits than the last H1, an end mark r00Hj is added to the next digit of the last H1 as specific information indicating that the data is at an end.

When the CPU 27 reads data from the data memory 30, it determines whether an end mark has been added to the data. As a result of this judgment, if an end mark has been added, the CPU 27 compares the number of digits of the data with the number of displayed digits. Further, if the result of the judgment in item 1 is that no end mark is added, the CPU 27 recognizes that the data is the entire range (21 digits), and compares the number of digits of the data with the number of displayed digits.

As a result of this comparison of the number of digits, if the number of data digits is greater than the number of displayed digits, the CPU 27
The data is displayed on the liquid crystal display section 4, and a key input standby state is entered. Further, as a result of the comparison of the number of digits, if the number of digits of the data is less than the number of displayed digits, the CPU 27 displays the data on the liquid crystal display section 4, displays a blank in the part where no data exists, and presses the key It enters the input waiting state. For example, if the data is one digit as shown in Figure 3(a), there is an end mark roOHJ at the 201fth position, so the number of digits in the data is recognized as "19", and (
Display the first 16 characters as shown in a).

When, for example, the addition key 12 on the keyboard 5 is pressed in the key input standby state, the CPU 27 determines whether or not the end (last digit) of the data is being displayed. As a result of this judgment, if the termination is not displayed, the CP
U27 scrolls the displayed content to the left as shown in FIG. 2(c) and (d), and when the end is displayed as shown in FIG. 2(d), the display content is scrolled to the left as shown in FIG. 2(e). The displayed content does not change (scroll).

Furthermore, when, for example, the subtraction key 13 on the keyboard 5 is pressed in the key input standby state, the CPU 27 determines whether or not the leading end (first digit) of the data is being displayed.

As a result of this judgment, if the tip is not displayed, the CPU
27 scrolls the displayed content to the right, and when the tip is displayed as shown in FIG. 2(a), the displayed content is not changed (scrolled) as shown in FIG. 2(b).

Further, in the key input standby state, when, for example, the division key 14 in the key photo 5 is pressed, the CPU 27 searches for and displays the next data. For example, if the next data is 5-digit data as shown in Figure 3(b), the display contents will be as shown in Figure 2(f), and the 6th to 16th digits will be displayed as shown in Figure 2(f).
The digit is displayed as blank. In this case, even if the addition key 12 or the subtraction key 13 is pressed, the displayed content does not scroll as shown in FIG. 2(g).

In addition, when the multiplication key 15 on the keyboard 5 is pressed in the key input standby state, the CPU 27
The previous data is displayed again as shown in Figure (h).

Further, in the key input standby state, when, for example, the equal key 17 on the keyboard 5 is pressed, the CPU 27 moves to the next process.

In this way, when the number of digits of data to be displayed exceeds the number of digits displayed on the display section, by scrolling the data and displaying it based on keyboard operations, it is easy to output data that exceeds the number of digits displayed on the display section. It becomes possible to display the Furthermore, by adding an end mark to the data, it is possible to display variable length data, and furthermore, it is also possible to limit the range of variation.

In the above embodiment, the scrolling range is limited, but it does not need to be limited, or if the scrolling range is limited and there is no end mark within that range, it is treated as an error and error processing is performed. You can do it like this. Also,
The end mark and key used are not limited to those in the embodiments described above, and other types may be used.

Furthermore, in the embodiment, an IC is used as a portable electronic device.
Although a card is shown as an example, the present invention is not limited to a card shape, and may be, for example, a block shape or a pencil shape. Furthermore, the hardware configuration of the electronic device can be modified in various ways without departing from the spirit of the invention.

Effects of the Invention As described in detail, according to the present invention, it is possible to provide a portable electronic device that can easily display data that exceeds the display output capacity of the display unit.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, and FIG. 1 is a flowchart explaining the operation, FIG. 2 is a diagram showing an example of a display in response to a key operation, and FIG. 3 is an example of data to be displayed. 4 is a block diagram showing the circuit configuration of the integrated circuit in the IC cart, and FIG. 5 is a plan view showing the configuration of the IC card. 2...Integrated circuit, 3...Contact section, 4...Liquid crystal display section (display section) 5......
・Keyboard, 6...Battery, 21...
Communication control circuit, 27...CPU (;lul
control unit, display control means), 28...program memory, 3)]...data memory (memory unit). Mouth mouth low mouth 2 b

Claims (1)

[Claims] A memory section for storing data, a keyboard for inputting data, etc., a display section for displaying and outputting data inputted with the keyboard or data stored in the memory section; and a display control means for scrolling and displaying data based on the operation of the keyboard when the data to be displayed and output on the display exceeds the display output capacity of the display. Features a portable electronic device.