KR100257251B1 - Character display method for lcd - Google Patents

Abstract

PURPOSE: A method for displaying a character of a liquid crystal display device is provided to easily operate a terminal by displaying a number, an English character and a Korean character displayed on an LCD used in a wireless mobile terminal as three lines using a 10*11 bit map font, and by displaying an English character and a Korean character including a number according to one control routine. CONSTITUTION: A line to be displayed on a screen is selected(ST1). 12-byte dot data of area 1 and 2 are read(ST2). 12-byte dot data of area 3 and 4 are read in order. Each upper 3-bit data are adopted(ST3). 12-byte dot data of area 1 and 2 of the second line are read in order(ST4). Bit data adopted is compounded with the 12-byte dot data. The data are displayed on page 1 and page 2(ST5,ST6).

Description

Character display method for LCD

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display (LCD), and in particular, numbers, alphabets, and Korean characters displayed on an LCD used in a wireless mobile terminal are displayed in three lines using a 10 * 11 bitmap font to facilitate terminal operation. The present invention relates to a character display method of a liquid crystal display device capable of displaying more characters.

In general, the LCD of a mobile terminal or a pager such as a pager, such as a mobile phone, a PCS, or a pager, can display numbers or letters. Particularly, the mobile terminal can display not only numbers but also English and Korean characters.

When the size of LCD is 32 * 112, 16 * 16 bit using 8 * 8 bitmap font structure for displaying Arabic numerals and 4 blocks of 8 * 8 bitmap for displaying Korean characters. It has a map font structure.

Therefore, as shown in Figs. 2 and 3 to display Arabic numerals or English letters, numbers or English letters are displayed using 8 * 8 bitmap fonts, and as shown in Fig. 4 to display Korean characters. Korean characters are displayed using 16 * 16 bitmap font.

In this way, when the size of the LCD is 32 * 112, four lines of 14 characters can be displayed for Arabic numerals and English characters, and two lines of seven characters for Korean characters.

By the way, in the character display method of the LCD applied to the conventional mobile terminal as described above, the complete Hangul code data is used to display Arabic numerals (or English letters) and Hangul characters, the Hangul characters using the completed Hangul code data In the case of displaying, the limitation is that only two lines can be displayed on one screen.

For this reason, the conventional LCD has a problem in that it cannot display a lot of information because the number of Korean characters displayed on one screen is limited to seven characters.

In addition, in processing Arabic numerals, English characters, and Korean characters, it is necessary to operate the conversion key for switching between English mode and Korean mode. Also, the character display is possible only when each control routine is operated separately. There was also a problem.

Accordingly, the present invention has been proposed to solve various problems arising in the method of displaying the numbers and characters of the LCD applied to the conventional mobile terminal, and the present invention provides the numbers, alphabets and characters displayed on the LCD used in the wireless mobile terminal. Korean characters are displayed in three lines using a 10 * 11 bitmap font, and a single control routine allows the display of numbers, as well as English and Korean characters. The purpose is.

Another object of the present invention is to display a number of characters, English letters and Korean characters displayed on the LCD used in the wireless mobile terminal in three lines using a 10 * 11 bitmap font to display a large number of characters on one screen It is to provide a character display method of the display device.

A method for achieving the above object of the present invention comprises the steps of rearranging a line of a screen to be displayed in the display of numbers and letters into a predetermined line; Selectively combining data in a data area recorded on each rearranged line with data in a neighboring area of the area; The combined data is transmitted to the LCD to display numbers or letters on each line.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a view for explaining the font structure of a conventional LCD,

a is an 8 * 8 bitmap font structure,

b is a 16 * 16 bitmap font structure.

Figure 2 is an example of the number display on the LCD consisting of a conventional 8 * 8 bitmap font.

Figure 3 is an example of character display on the LCD made of a conventional 8 * 8 bitmap font.

Figure 4 is an example of character display on the LCD made of a conventional 16 * 16 bitmap font.

5 is a schematic configuration diagram of a mobile terminal to which the present invention is applied.

6 is an explanatory diagram of the size of the LCD applied to FIG. 5;

7 is a font structure diagram showing a bitmap font structure in the present invention.

8 is a view for explaining a process of displaying characters on the LCD in the present invention.

9 is an example of the numeral and character display of the LCD according to the present invention,

a is an example of Arabic numerals,

b is an example of an English letter,

c is an example of displaying Korean characters.

Figure 10 is an example of the display of numerals, English letters, Hangul characters of one LCD according to the present invention.

11 is a signal flow diagram showing a character display process of the LCD according to the present invention.

* Explanation of symbols for main parts of the drawings

10: wireless transceiver 20: LCD

30: main processor unit 40: currency path forming unit

50: memory

5 is a schematic structural diagram of a wireless mobile terminal system to which the present invention is applied.

As shown therein, reference numeral 10 denotes a wireless receiver for transmitting and receiving wireless data, reference numeral 20 manages and controls the overall functions of the mobile terminal, and a combination of numeric and text data to be displayed on the LCD 30. It is the main processor unit that performs

In addition, reference numeral 40 is a call forming unit that delivers the voice received under the control of the main processor unit 20 to the speaker, the user's voice input from the microphone to the transmission loop side to be transmitted from the other party, Reference numeral 50 is a built-in program for the main processor 20 to perform a function, and is a memory unit for storing data such as user information and call information.

In the above, the memory unit 50 is composed of a nonvolatile memory 51, a data memory 52 and a program memory 53.

Referring to FIG. 5 to FIG. 11 to which the character display method according to the present invention is attached with reference to the wireless mobile terminal system to which the present invention configured as described above is applied as follows.

First, the operation of the wireless mobile terminal illustrated in FIG. 5 will be briefly described. The wireless transmission / reception unit 10 receives data received wirelessly and transmits the data to the main processor unit 20, which is also obtained from the main processor unit 20. The main processor unit 20 performs the overall control of the voice transmission and reception as described above, and controls the call path forming unit 40 so that the voice transmission and reception is performed properly. At the same time, a control operation for displaying the counterpart phone number or other text data on the LCD 30 is performed.

By the control of the main processor 20, the LCD 30 displays the other party's telephone number or text data. Here, the operation and method of displaying the numbers or text on the LCD 30 will be described in detail below. .

First, referring to the concept of the character display method of the LCD proposed in the present invention, in the present invention, when the size of the LCD is 32 * 112 as shown in FIG. 6, the existing 8 * 8 dot 4 line or 16 * 16 dot 2 line is used. It is rearranged into 3 lines of 10 * 11 dots and puts a space between letters and letters or lines and lines, so that it is actually composed of 3 lines of 11 * 12 dots. In addition, by using 10 * 11 bitmap font and KS 5601 completion type code for displaying it, Korean characters and English characters are displayed at the same time in three lines so that many Korean characters can be displayed on one screen.

Character display method according to the present invention on the basis of this principle, the existing 8 * 8 bitmap font structure and 16 * 16 bitmap font structure as shown in Figure 1a and 1b as shown in Figure 10 10 * 11 bitmap font Change to the structure. If the bitmap font structure is 10 * 11, three lines can be made as shown in FIG.

When the desired number or character is displayed on the three lines, the main processor unit 20 shown in FIG. 5 directly transmits the corresponding data to the LCD 30. The number or character displayed on the LCD 30 is actually displayed. As shown in the left side (as viewed from the front) of FIG. 10, another uncompleted character is displayed in addition to the number or letter to be actually displayed, thereby causing confusion for the user who recognizes it.

This means that the data output unit is 1 byte (8 bits) when the desired number or character is displayed in the main processor unit 20. Each line of the LCD proposed in the present invention is a 10 * 11 bitmap font structure in which data is recorded. This is because some of the areas (10 * 11 macroblocks) may have data left or insufficient.

Therefore, in order to solve this problem and display more and more character data (especially, Hangul characters) on the LCD, a mutually selective combination between data recorded in the data area of each line and data neighboring the data area must be made.

Only then will the desired numbers and characters be displayed on the set lines as shown in the figure on the right side (as seen from the front) of FIG.

FIG. 11 is a flowchart illustrating a method of displaying on a LCD a completed Hangul character made of a mutually selective combination of the above data.

As shown in the drawing, first, a data recording line of an LCD having a size of 32 * 112 has a bitmap font structure of 10 * 11 (11 * 12 bitmap font in the case of including line blank and data blank). Rearrange to 3 lines, select the line on the screen to display as the next step and display the number or letter on that line.

Here, the number or letter displayed on each line is Arabic numeral "0" on the first line, the English letter "D" on the second line, and the Korean character "angle" on the third line. If it is assumed, in order to display the Arabic numeral "0" on the first line, ① of each region (①, ②, ③, ④ region) to be divided into 8 * 8 bitmap structures as shown in FIG. (2) Read the 12-byte dot data of the area (ST2). Next, in the region division diagram of FIG. 8, 12 bytes of dot data of the 3 and 4 regions are read in sequence, and only the upper two bits are taken (ST3). This is because the data of the above ① and ② areas are in 8-bit units, so that in the 10 * 11 bitmap font structure, 2 bits in length and 3 bits in width are insufficient. Therefore, in order to make insufficient vertical bits, the upper two bits of the dot data of the above ③ and ④ areas are taken to be 10 bits, and the missing 3 bits are filled by first reading 12 bytes of dot data. After that, the 12-byte dot data of the areas 1 and 2 of the second line are read in sequence, and only the upper 5 bits are taken (ST4). Next, the bit data taken in step ST3 and ST4 is combined with the 12-byte dot data read in step ST2 (the 10 * 11 bitmap structure is completed), and the display data is shown in FIG. Display on one page 1 (PAGE1) and page 2 (PAGE2) (ST5) (ST6). This causes the Arabic numeral "0" to be displayed on the first line of the LCD.

In other words, when the Arabic numeral "0" is displayed on the LCD, only the dot data of the area ① and the first three dot data of the area ② are displayed, and the dot data of the areas ③ and ④ and the area ① of the English letter "D". And dot data of area ② are displayed in combination. Even in this case, only the first three pieces of dot data in the area? Of the Arabic numeral " 0 "

In the above-mentioned page, the size of LCD applied to a general mobile terminal is 32 * 112 dots, and the 32 rows of dots are composed of 8 dots each to form one unit. Such 8 dots are referred to as pages. The LCD reads and writes dot data in units of pages.

On the other hand, when the English letter "D" is displayed on the second line (12 dots to 22 dots), the first step is to read the 12-byte dot data of the regions ① and ② of the above ①, ②, ③ and ④ areas of FIG. The temporary storage is performed (ST7), and only the upper five bits of the next stored 12-byte dot data are taken (ST8). Then, after sequentially reading the 12-byte dot data of the (3) and (4) areas of Fig. 6 (ST9), only the upper two bits of each of the 12-byte dot data of the read (3) and (4) areas are taken (ST10). Thereafter, each lower 3 bits are taken from the 12-byte dot data stored in the step ST7, and the upper 2 bits taken in the step ST10 are combined with the taken 3 bits (ST11). Next, the 12-byte dot data of the areas 3 and 4 of the first line are read in sequence, taking only the upper two bits (ST12), and combining the upper two bits obtained in this way with the upper five bits obtained in the step ST8 ( ST13). In addition, by reading the 12-byte dot data of the first and second regions of the third line in sequence, taking only the upper two bits (ST14), and combining the dot data obtained in the above-described step (ST11) (ST15), and the combined result value. Display dot data on page 2 and page 3 of the LCD (ST15) (ST16). The English letter “D” is then displayed on the second line of the LCD (12 to 22 dots vertically).

That is, in order to display the English letter "D", the dot data of the 3 and 4 areas of the number "0" of the first line and the dot data of the 1 and 2 areas of the Korean character "angle" of the third line are respectively displayed. In this case, only the first three pieces of dot data in the areas ② and ④ of the English letter “D” are displayed.

In addition, when the Hangul character "angle" is displayed on the third line (23 dots to 32 dots) of the LCD, the first step is to read and temporarily store the 12-byte dot data of the ① and ② areas of FIG. ST17), only the upper two bits of the temporarily stored 12-byte dot data are taken (ST18). Subsequently, after reading the 12-byte dot data of the areas 3 and 4 of FIG. 6 in sequence (ST19), only the upper two bits are taken (ST20). Next, only the lower 6 bits of the 12-byte dot data temporarily stored in the step ST17 are taken, and then the upper two bits of dot data taken in the step ST20 are combined (ST21). After reading the 12 byte dot data of the ① and ② areas of the second line of LCD in order and taking each lower 3 bits (ST22), the 12 byte dot data of the ③ and ④ areas of the second line are read in order After taking only the upper two bits, the lower three bits of the? And? Region 12-byte dot data obtained in the above step ST22 are combined (ST23). Next, the dot data obtained in step ST23 and the upper two bits taken in step ST18 are recombined (ST24), and the combined dot data is displayed on page 3 and page 4 of the LCD to display Korean characters. Angle "is displayed on the third line of the LCD (ST25).

That is, the Korean character "angle" displayed on the third line of the LCD is also made by selectively combining the dot data of the ①, ③ area and ②, ④ area of the English letter "D" of the second line with each other, and the created dot data It is displayed on the third line of the LCD.

The Arabic numerals "0" and the alphabetic characters "D" and the Hangul characters "angle" described above are not necessarily displayed on the first, second, and third lines of the LCD, and are not displayed on the LCD. In the present invention, a line is selectively set in order to show the display method of each number and character.

Therefore, all Arabic numerals can be displayed on each line of the LCD, and only English characters can be displayed, and only Korean characters can be displayed on the LCD.

The character display method of the LCD described above has been described as an embodiment only for the mobile terminal for convenience in the present invention, the present invention is not limited to the LCD mounted to the mobile terminal, all displays for displaying numbers and characters through the LCD It is widely applicable to equipment.

As described above, the present invention has the effect of displaying a large number of Korean characters on one screen by configuring English data and Korean characters by configuring three lines of data display lines of the LCD.

In addition, since the display of Arabic numerals and characters is possible using only one control routine when displaying numbers and characters, there is an effect of eliminating the complexity of the conventional character display process.

Claims (5)

A method of displaying Arabic numerals and characters by liquid crystal, the method comprising: a line rearranging process of rearranging screen lines into three lines having a 10 * 11 bitmap font structure when displaying numbers and characters on a screen; And a dot data combination process of selectively combining the data in the data area recorded on each rearranged line with the data in the neighboring area of the area to generate numeric or character data for display and displaying the same on the screen. Character display method of the liquid crystal display device. The method of claim 1, wherein the dot data combining process comprises: a first dot data combining step of combining dot data displayed on a first line of the rearranged three lines; A second dot data combining step of combining dot data displayed on a second line of the rearranged three lines; And a third dot data combining step of combining dot data displayed on a third line of the rearranged three lines. The method of claim 2, wherein the first dot data combining step sets an area of the first 8 * 8 bitmap font structure of each line as a first area, and an area of the next 8 * 8 bitmap font structure of the first area. Is divided into a second area, an area of an 8 * 8 bitmap font structure immediately below the first area, and a third area, and an area of a next 8 * 8 bitmap font structure of the third area into a fourth area, respectively. , Sequentially reading 12-byte dot data of the first and second regions of the first line, and sequentially reading the 12-byte dot data of the third and fourth regions of the first line, and then only each upper 2 bit. Extracting, sequentially reading 12-byte dot data of the first and second regions of the second line and extracting only the upper 5 bits; and extracting the 5-bit dot data and the first and second of the first line. 12-byte dot data of an area Phase and a character display method according to the combination of the dot data, characterized by made of an step of displaying the page 1 and page 2 of the LCD. 3. The method of claim 2, wherein the combining of the second dot data sets the area of the first 8 * 8 bitmap font structure of each line as the first area, and the next 8 * 8 bitmap font structure of the first area. Dividing an area into a second area, an area of an 8 * 8 bitmap font structure immediately below the first area, and a third area, and an area of a next 8 * 8 bitmap font structure of the third area into a fourth area, respectively. In the state, the first step of sequentially reading the 12-byte dot data of the first and second areas of the first line and extracting only the upper 5 bits, and the 12-byte dot data of the third and fourth areas of the second line in order A second step of extracting only the upper two bits after reading; a third step of combining the extracted upper two bits and each lower three bits of the 12-byte dot data of the first and second regions of the first line; 12-byte dot day in the third and fourth areas of the first line Read the data sequentially and extract only the upper two bits, and then combine the extracted upper two bits with each of the extracted upper five bits, followed by the 12-byte dot data of the first and second regions of the third line. Reads and extracts only the upper two bits, and combines the extracted upper two bits with the dot data combined in the third step; and the dot data combined in the fifth step is used for page 2 and page of the LCD. Character display method of the liquid crystal display device comprising the sixth step of displaying on the third. 3. The method of claim 2, wherein the combining of the third dot data sets an area of the first 8 * 8 bitmap font structure of each line as a first area, and the next 8 * 8 bitmap font structure of the first area. Dividing an area into a second area, an area of an 8 * 8 bitmap font structure immediately below the first area, and a third area, and an area of a next 8 * 8 bitmap font structure of the third area into a fourth area, respectively. In a state, reading and storing 12-byte dot data of the first and second regions of the third line in sequence, extracting each of the upper two bits of the stored 12-byte dot data, and generating the first line of the third line. Reading 12 byte dot data of 3rd and 4th areas in sequence and extracting only the upper 2 bits, each of the lower 6 bits of the 12byte dot data of the first and second areas of the third line and the third and Combining each of the upper 2 bits extracted from the fourth area And sequentially reading 12-byte dot data of the first and second regions of the third line and extracting only the lower three bits, and extracting each of the extracted lower three bits and the third and fourth regions of the second line. Combining the upper two bits of the 12-byte dot data of the step; and combining the upper two bits extracted from the 12-byte dot data of the first and second regions of the third line with the dot data combined in the step. And displaying the dot data combined in the above steps on pages 3 and 4 of the LCD.

Images