KR930005809B1 - Display system for compact electronic apparatus - Google Patents

Abstract

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Description

Display Systems for Compact Electronics

1 is a perspective view of a compact electronic device used in the present invention.

2 is a schematic block diagram showing a circuit configuration of a compact electronic device used in the present invention.

3 is an exemplary view showing the contents of a display collection memory device used in the compact electronic device of FIG.

4 is a diagram showing display information stored in a memory of an IC card.

5 is a flow chart for explaining the main display operation of the compact electronic device.

6 is a flowchart for explaining an operation executed by a program stored in an IC card.

7 is a flowchart for explaining the operation of various circuits of the compact electronic device during the display operation.

8-11 illustrate various display states of a display device.

* Explanation of symbols for main parts of the drawings

4: IC card 18: Display control device

21: display device 193: first comparator

194: second comparator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to display systems for compact electronics, and more particularly to compact electronics having display devices having different display sizes and capable of appropriately displaying display information received from the same display information source. An information display system.

In general, a conventional electronic device for displaying characters uses a liquid crystal display device of dot matrix type as a display device. The data to be displayed, for example, character codes, are converted into image data or bit patterns, and the converted display data is stored in the screen memory corresponding to the points constituting the liquid crystal display panel, and then the display operation is executed in the contents of this screen memory. Is executed according to.

On the other hand, since consumers have demanded a display screen that can be viewed much more easily, the display screen size of the present invention is changed to enlarge without changing the basic function of the display system. In such a case, although no change occurs in the calculation control and the memory control, the control device or the LSI used for the electronic device must be prepared independently to be suitable for the change of the display device. Thus, the LSI design used in the display device comes with an economical problem because it must be changed to accommodate slight changes in the display screen size.

Also, in recent years, information processing apparatuses have been made practically capable of connecting an external storage medium, for example, an IC card, and enabling execution of a program stored in the IC card in advance in this state.

According to such an information processing apparatus, when a program stored in an IC card is executed, for example, when an information display program is executed, the display data is displayed together with information of column and line numbers for display purposes. Received from, the display data is only displayed at the designated location of the display device.

However, there are various information processing apparatuses of the same kind but of different kinds. Thus, for example, when a program for displaying data on a three-row by five-column display device is stored in the IC card, the entire screen of this display device is only displayed under the condition that the screen size of the display device is three-row by five columns. Can be effectively used to display other types of display devices, for example, a screen size of 4 rows by 10 columns is used in place of the screen sizes of 3 rows by 5 columns described above, and when the above-described IC card is used, display data Is displayed only within the display portion of 3 rows x 5 columns. This not only makes effective use of the display range of the display device but also makes the display data appear poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems with a conventional information display apparatus, and an object of the present invention is to provide an information display system capable of appropriately displaying information even when a compact electronic apparatus uses a display apparatus having a different display range. I put it.

A display system according to the present invention comprises: display range memory means for storing data representing a display range including at least one display column number and display row number for a display screen of a display device; Display position data memory means for storing the column position of the display screen and the behavior value indicating the display position of the character data read out from the memory means; First comparing means for comparing the column position data stored in the display position data memory means with the number of display columns stored in the display range memory means; Second comparing means for comparing the behavior value data stored in the display position data memory means with the number of display rows stored in the display range memory means; And control means for controlling the rewriting of the column position and the action value data stored in the display position data memory means and the writing of the character data on the display apparatus.

The invention will be described by way of example only with reference to the accompanying drawings. Referring now to the drawings, a compact electronic device using the information display system according to the first preferred embodiment of the present invention will be described.

1 is a perspective view of a first compact electronic device. In FIG. 1, reference numeral 1 is composed of a main body 1a and a lead 1b hinged to the main body 1a. A keyboard 2, a power-on switch 3a, and a power-off switch 3b are provided on the surface of the main body 1a, while the card loading unit 5 is an IC (Integrated Circuit) card. In order to mount (4), it is provided in one side surface (right part of FIG. 1) of the main body 1a. A card (CAD) key 7 for setting a card mode on the inner surface of the lid 1b; TEL key (8) for setting the telephone mode; MEM key (9) for setting memo mode; Sch key 10 for setting a schedule mode; And TIM keys 11 for setting the time mode are provided in a row, and a liquid crystal display panel 12 for displaying various data is provided. In addition, a cursor key 13 composed of four switch parts is provided next to various function installation keys. The " ↑ " key 13a and " ↓ " key 13b provide a display direction of scrolling to the card mode.

In FIG. 2, the overall circuit configuration of the compact electronic device shown in FIG. 1 is shown. The circuit comprises a key input device 15, a ROM (read-only memory device) 16, a RAM (arbitrary access memory device 17), a display control device 18, and a read control device (CPU). 19) and the housing connector 20 are connected.

The above-described key input device 15 corresponds to the keyboard 2, the cursor keys 13, and the various keys 7-11 described above. The ROM 16 stores in advance a program for controlling various functions of the apparatus and a conversion table for converting character codes into character patterns. The RAM 17, which provides an area in which various data can be stored, includes a display start row pointer (n, 171), a display row pointer (m, 172), a character pointer (P, 173), and the head character pointer data of each row. Zones T (1), T (2),... And a display character code register (CHR) 175. The data stored in the RAM 17 is used to control the display of the various data described above in the IC card 4.

The compact electronic device shown in FIG. 1 also includes a compact electronic device 21. The display apparatus 21 includes an LCD panel 12, an LCD driver for driving the LCD panel 12, a VRAM 212, and a display form memory 213. The VRAM 212 stores image data to be displayed on the LCD panel 12.

The function of the display foam memory device 213 is to store the foam or specification of the display device 21. 3 shows different types of display memory contents, namely Type A and Type B. FIG. There is a difference between the character data to be displayed and the address data depending on the size of the display panel 12.

The display control device 18 includes a memory device 183, wherein the top address of the VARM, the end address of the VRAM, and the scores are displayed in the LCD panel from the display foam memory device 213 to the memory areas A, B and C. In the vertical direction of (12). Based on the recorded data, the display control device 18 executes data recording control and display control with respect to the display device 21. In addition, under the control of the display controller 18, the row designation data YI used to record the digit designation data XI and the character data to the VRAM 212 may include the digit position memory 181 and the behavior value memory 182. Remembered). The digit designation data XI and the row designation data YI are supplied to the read control device 19.

The read control device 19 has a memory 191 for storing the digit number data Xc of the display device 21 and a memory 192 for storing the row number data Tc. 193 and 194 and error flag memories EX, 195 and EY, 196.

Also, the digit designation data XI and the row designation data YI are supplied to the comparators 193 and 194. The first comparator 193 compares the digit number data Xc stored in the memory 191 with the digit designation data XI stored in the dessert position memory 181. When the comparison result is XI> Xc, the flag is stored in the error flag memory (EX, 195). The second comparator 194 compares the row number data Yc stored in the memory 192 with the row designation data YI stored in the behavior value memory 182. When the comparison result is YI > Yc, another flag is given to the error flag memory (EY, 196).

On the other hand, the IC card 4 is composed of a ROM 31 and a card connector 32. For example, as shown in FIG. 4, the display information is stored in the ROM 31, and a program by such display information that can be displayed is stored in advance in the ROM. The card connector 32 is used to connect the IC card 4 to the housing 1 via the housing connector 20.

는 개행코드를 나타낸다.Shown in FIG.

Indicates a newline code.

Referring now to FIGS. 1-4 with reference to the flowchart shown in FIG. 5, the information stored in the IC card 4 while the IC card 4 is loaded in the housing 1 (FIG. 4). Is displayed on the display panel 12 of the compact electronic device. In the preferred embodiment, the display 21 uses the "A" type foam shown in FIG. In this display device 21, a 48 x 64 dot matrix is used as the LCD (liquid crystal display) panel 12. One character consists of a 16x8 dot pattern, and a character display is performed by 3 rows x 8 columns. Thus, the VRAM 212 has a memory capacity of 48x64. In this VRAM 212, the top address " 0000 " represents the region of the VRAM 212 corresponding to the first 8 bits of the first row and first column of the display panel, and the end address " 017F " ) Denotes the region of the VRAM 212 corresponding to the sixteenth eight bits of the third and eighth columns of the display panel.

It is executed according to the flowchart shown in FIG.

In step SI of the flowchart, the upper address ("0000") of the VRAM, the end address ("017F") of the VRAM, and the score ("48") in the vertical direction of the LCD panel 12 are displayed in the display apparatus 21. Is read from the display form memory 213 of the display control unit 213 and stored in each memory area of the memory 183 of the display control unit 18. Thereafter, the display digit number " 8 " and the display row number " 3 " are read out from the display form memory 213 and then stored in the memories 191 and 192 of the read control device 19 in step S2. .

Next, the display process proceeds to the next step S3, where the LCD PANEL 12 is under the control of the CPU 14, in a preferred embodiment a 1 / C duty. Driven at 1/48 duty. As described in more detail, the display information is read out from the IC card 4 in step S4 and displayed in the next step S5.

The display information reading operation defined in step S4 will be described with respect to the flowcharts shown in FIG. 6 and FIG.

FIG. 6 is a flowchart for showing a program in which display information of the IC card 4 is transmitted to the housing 1 as shown in FIG. 7 is a flowchart for explaining a process of performing a display operation in the housing of the device.

In the flowchart shown in FIG. 6, " 1 " is set in the display start destination pointers n and 171 and the character pointers P and 173 of the RAM 17 to initialize the transfer program in step A1. The display start line pointer n indicates the number of lines for which information or characters are displayed on the first line of the display panel 12 when the actual display of the entire information becomes a plurality of lines. The character pointer P indicates the position of each character data shown in FIG. Then, the display data transfer process proceeds to step A2, where the value of the display start row pointers n and 171 ("n"), that is, "1" in this step is the display row pointer (m, 172). Is recorded in the action value memory 182 for storing the row designation data YI so that the first row of the display apparatus 21 is designated. This process then proceeds to step A3, where the value " P " of the character pointers P and 173, i.e., " 1 " in this case, is recorded in the head character position buffer T (1). This means that the buffer T (1) stores the first character of the first line so that "N" of the character string "NUMBER" matches. &Quot; 1 " is also recorded in the digit position memory 181 for storing the digit designation data XI, whereby the first digit in the first column is designated. The process proceeds to step A4 and it is determined whether the character corresponding to the character pointers P, 173 is the same as the newline code. In this case, since the first character of the display character data shown in FIG. 4 corresponds to "N" rather than a newline code, it is determined as "NO" and proceeds to the next step A5.

In step A5, the P th character code is written to the display character code register (CHR) 175 of the RAM 17. Thereafter, the process proceeds to step A6, in which the display BIOS program shown in FIG. 7 previously stored in the ROM 16 of the housing 1 of the device is executed.

In step E1 of the flowchart shown in FIG. 7, the error flag memory EX, 195 and the error flag memory EY, 196 are reset to " 0 ".

Next, the program proceeds to step B2 and checks whether the digit designation data XI of the memory 181 is larger than the display digit number data Xc. In this step, since XI = 1 and Xc = 8, it is determined as "NO", and the display process proceeds to step B3. In this step B3, it is determined whether the row designation data YI of the memory 183 is larger than the display row count data Yc. In this step, since YI = 1 and Yc = 3, it is determined as "NO", and the display process proceeds to step B4. In this step B4, the dot pattern of the character data "N" recorded in the display character code registers CHR 175 is, as shown in FIG. 8, therefore, the first line of the first row of the display panel 12 is changed. It is written to the memory area of the VRAM 212 corresponding to one digit position. Next, this display process returns to the flowchart shown in FIG.

If it is determined that XI> Xc or YI> Yc, this means that the character to be displayed is written outside the display panel 12 so that the error flag is set in step B5 or B6 and the process shown in FIG. It means to return.

In FIG. 6 the display process returns to step A7. In step A7, it is determined whether " 1 " is set in the error flag memory EY, 196. In this case, since "1" is not set, it is determined as "NO" and the process proceeds to step A8. In step A8, it is checked whether " 1 " is set in the error flag memory EX195. Similarly, since "1" is not set in the error flag memory EX, 195, it is determined as "NO" and the process proceeds to step A9.

In step A9, the contents of the digit position memory 181 for storing the digit designation data XI are added with 1 to designate the next position along the X direction, and the character pointers P, 173 are "1" is added so that the character of.

Thereafter, the process returns to step A4. The process as defined from step A4 to step A9 is repeated for each character of the remaining character "NUMBER". As a result, the dot pattern of "NUMBER" is written to the VRAM 212 corresponding to the first display row.

)가 지정될때, 단계(A4)에서 "YES"로 판단되며, 공정은 단계(A10)로 진행된다.The character pointer (P, 173) takes "7" and the newline code (

Is designated, it is determined as "YES" in step A4, and the process proceeds to step A10.

In step A10, the character pointer P is set to "+1", that is, "8", and the process proceeds to step A11. In step A11, the row designation data YI and the display row pointer m are each set to "+1". The character writing operation is moved to the second display row of the display panel 12, and then the process returns to step A3.

In step (A3), the value ("P") of the character pointers P and 173, that is, "8" in this step is recorded in the head character position buffer T (2) and the head character located in the second line. The memory contents corresponding to "0" are stored. Further, " 1 " is recorded in digit position memory 181 for storing digit designation data XI for designating the first digit of the display panel. As described above, the specified error operation is executed after step A4.

When steps A4-A9 are repeatedly executed and " 01234567 " is recorded in the second row of the display, " P " is 16, and the process returns to step A4. Where XI becomes "9". Since the character "8" is designated by the character pointer P = 16, the character code of "8" is recorded in the CHR 175 in step A5. However, at step A6, i.e., at step B2 of the flowchart shown in FIG. 7, it is determined that XI = 9> Xc = 8, and " 1 " is set in the error flag memory EX, 195. . Next, in step A8, it is determined as "YES" and the process proceeds to step A11. In step A11, the row designation data YI of the memory 182 is added with " 1 " to designate a third row. In addition, the contents of the display row pointers m and 173 are set to " + 1 " to record " 3 ". The process returns to step A3, and the value "P" of the character pointer 173, i.e., "16", is recorded as the character position information for the head character position buffer T (3). The first character of the third row corresponding to the character " 8 " is stored and " 1 " is recorded in the digit position memory 181 for storing the digit designation data XI to designate the first digit. Then, similarly, the specified process operation is executed after step A4.

)가 문자포인터(173,P=18)에 의해 판독될때, 공정은 "YI"가 "4"가 되도록 단계(A4, A10 및 A11)로 진행된다. 따라서, 제7도에 도시된 플로우챠트의 단계(B3)에서 "YES"로 판단되어 공정은 "1"이 에러플래그 메모리(EY, 196)에 세트되는 단계(B6)로 진행된다. 그러면, 단계(A7)에서, "YES"로 판단되어 공정은 단계(A12)로 진행되며, 단계(A12)에서,문자기록동작이 일단 정지되고, VRAM(212)의 내용은 디스플레이 되며 키입력은 대기상태가 된다. 이때, 디스플레이 스크린은 제8도로 나타내어진다.After the process defined in steps A4-A9 is executed, the characters "8" and "9" are recorded in the third line. Second newline code (

Is read by the character pointers 173, P = 18, the process proceeds to steps A4, A10 and A11 so that " YI " Therefore, in step B3 of the flowchart shown in FIG. 7, it is determined as "YES" and the process proceeds to step B6 in which "1" is set in the error flag memory EY 196. Then, in step A7, it is determined as "YES" and the process proceeds to step A12. In step A12, the character writing operation is stopped once, the contents of the VRAM 212 are displayed and the key input is Stand by. At this time, the display screen is shown in FIG.

Next, when the key input operation is executed by the operation of the key device 15, the key ("↑", 13a) or the key ("↓", 13b) in the cursor key 13 is executed in steps A13 and A14. It is determined whether it is operated. It should be particularly noted that this state is maintained unless the key operation is executed in the key input device 15. When the key " ↓ " 13b is operated, it is determined as " YES " in step A14, and the process proceeds to step A15. In step A15, the display start row pointers n and 171 of the RAM 17 are written with " 2 " plus " 1 ". In step A16, the stored value "8" is read from the head character position buffer T (2), and the value of the character pointer P, 173 ("A16") is read. P "). The process then returns to step A2. In step A2, the value "n" of the display start row pointer (n, 171), that is, "2" in this step is written to the display row pointer (m, 172), and "1" of the display. It is recorded in the action value memory 182 which stores the row designation data YI so that the first row is designated.

Thereafter, the process defined in step A3 and the steps after step A3 are executed in a manner similar to the preceding process operation. That is, when the keys " ↓ " 13b are operated, new screen creation is executed for the data display after the second row. As a result, as shown in FIG. 9, the character ("0") corresponding to "8" of the character pointers P and 173 is displayed at the head position of the first row. Next, the characters are displayed on the display panel 12 composed of three rows X8 columns based on the display character data shown in FIG.

On the other hand, when the key " ↑ " 13a is operated, it is determined as " YES " in step A13, and the flow proceeds to step A17. In step A17, it is determined whether the contents of the display start row pointers n and 171 of the RAM 17 are "1". If " n " is " 1 ", since scrolling is not performed in the reverse direction, the process returns to step A2 to form the same display.

If "n" is any other number than "1", it is determined as "NO", and the process proceeds to step A18. In step A18, the display start row pointers n, 171 of the RAM 17 are 1 is subtracted. In this step, if the content of the display start line pointer n becomes "2" by the operation of the key "↓", this content becomes "1" again, and the display start line pointer ( n, 171. Then, the process proceeds to step A16, where the value ("1") of the first positional position buffer T (1) is the value of the character pointer P, 173 ("P"). In this state, the process returns to step A2. The display screen will be formed by scrolling the character in the reverse direction after step A2.

Next, when a display device capable of displaying 4 rows x 16 columns, that is, a B type display (see FIG. 3) is used as the display panel 12 of the housing 1 of the device, (Xc) At "16", (Yc) is set at "4". As a result, when the information shown in FIG. 4 is displayed on the type B display device, various operations as defined in the flowchart as described above are executed, so that "NUMBER" "0-9" "ALPHABET" and "AP Character is written on each line after being processed by the newline code, and finally displayed as shown in FIG.

As a result of using this display system, even if the dimensions of the display range for the display panel 12 are changed due to the change of the type of the display device 21 used in the housing 1 of the device, the characters of the IC card are displayed. Determine whether the data has exceeded the display range of the display panel 12 based on the display column number Xc and the display row number Yc, so that the data display effectively uses the entire screen (area) of the display panel 12. Thus it is written to the VRAM 212 during execution. Therefore, compared with the conventional display system in which data is displayed only on a part of the display device when the display range of the display device is changed, even if the display range of the display panel is changed, the display range of the display device can be usefully utilized and the data can be displayed at the same time. The appearance can be satisfactorily represented.

The present invention is not limited to the above-described preferred embodiments, and may be changed without departing from the technical scope of the present invention.

In the preferred embodiment described above, the number of display columns Xc and the number of display rows Yc are fixedly set according to the display range of the display panel 12. Alternatively, the display numbers Xc and Yc will be set as variables, for example, when a display such as a function display different from the display information of the IC card is created on the display screen. That is, when the function display is executed as shown in Fig. 11, (Yc) is selected as "2", while when the function display is deleted, (Yc) is selected as "3". As a result, the display can be changed without performing a special operation on the IC card 4. Further, the display method according to the present invention can be applied to any display device having dimensions different from 3 rows x 8 columns and 4 rows x 16 columns.

Claims (7)

A display system for displaying character data stored in a data memory means on a display device of a compact electronic device, the display system comprising: storing data representing a display range including at least one of the number of columns and display rows of a display screen of the display device; Display range memory means; Display position data memory means for storing column position and behavior value data of a display screen which designates a display position of character data read by said data memory means; Second comparing means for comparing the column position data stored in the display position data memory means with the number of display rows stored in the display range memory means; And first comparing means for comparing the number of display columns stored in said display position data memory means; And control means for controlling to rewrite the column position and the action value stored in the display range memory means and to record the character data to be displayed on the display device, the action value data stored in the display position data memory means. Display system for compact electronics. The display system of claim 1, wherein the display system comprises a compact electronic device including the display range memory means, the first comparing means, and the second comparing means, and a storage medium including display information and control means. Display system for compact electronics. The method of claim 2, wherein the control means; And a line breaker for supplying a recording position of text data when the first comparing means determines that the column position exceeds the number of display columns. The method of claim 3, wherein the control means; And means for stopping said text data recording when said second comparing means determines that an action value exceeds a number of display rows. According to claim 3, The opening means; Means for setting column position data stored in the display position data memory means in a first column; And means for incrementing action value data stored in said display position data memory means. 3. The memory device of claim 2, wherein the storage medium includes a card device having an IC (Integrated Circuit) memory chip, wherein the compact electronic device includes a portion for storing the card device and connecting the card device to a compact electronic device. Display system for a compact electronic device, characterized in that. The display apparatus of claim 2, wherein the display device comprises: Display memory means for storing character data transmitted from said data memory means for display purposes; And means for addressing the display memory means in accordance with column position and behavior value data stored in the display position data memory means.

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