KR910008526B1 - Liquid crystal display device and method - Google Patents

Abstract

The circuit for displaying both of Koreany and English characters on the LCD panel by using the 5x7 dot matrix cell for English characters, symbols and separated Korean characters, and the 10x14 dot matrix cell for combined Korean characters includes a displayer (16) composed of the 5x7 dot matrix and the 10x14 matrix, a data/program memory (13) for combining the separated Korean characters to the combined characters, and a central processing unit (12) for applying the basic font data stored in a memory (14) to a LCD display driver (15) to display the fonts on a display panel (16).

Description

Korean-English combined display and display method

1 is a block diagram showing a display device of the present invention.

FIG. 2 is an explanatory diagram showing the configuration of a liquid crystal for a Korean display using a 5 x 7 dot matrix of the liquid crystal display of FIG.

3 is an explanatory diagram showing an example of display of each type of Hangul.

4 is a diagram showing an example of a Korean font stored in the character generating memory of FIG.

FIG. 5 is a diagram showing the binarization datata for the Hangul song.

6 and 7 are signal flow diagrams showing a display method of the present invention.

* Explanation of symbols for main parts of the drawings

11: keyboard unit 12: central processing unit

13: Data / Program Memory 14: Character Generation Memory

15 liquid crystal display driver 16 display unit

17: printer driver

The present invention relates to a Korean-English combined use liquid crystal display device and a display method as long as the Korean and English are displayed on the liquid crystal display device (hereinafter, abbreviated as 'LCD').

Korean and English characters have different forms. In addition, the English and various symbols may be displayed in the configuration of a dot matrix capable of displaying Korean characters. In other words, Hangul is composed of a 16 × 16 dot matrix per letter when writing, and the English and various symbols are composed of a 5 × 7 dot matrix.

Therefore, the Korean-English combined system uses an LCD having a 16 × 16 dot matrix structure regardless of Korean, English, and various symbols.

As such, the display device of the Korean-English combined typewriter requires an LCD having a composition of 5 × 7 dots per letter to display English, but has a configuration of 16 × 16 dots per character to display Korean. Since the LCD requires a complicated structure of the display module, the interface with the central processing unit is difficult, and the size of the memory for generating characters increases.

In addition, in order to avoid the complexity of the above structure, the Korean display is displayed in the same way as the English display using a 5X7 dot matrix, but the Hangeul method is, for example, 'school' ㅎ, ㅏ, ㄱ, ㄱ, ㅛ 'like five consonants and vowels, so it was difficult to recognize the character.

The present invention was devised to solve the above-mentioned conventional problems. The LCD is composed of a 5 × 7 dot matrix and a 10 × 14 dot matrix to provide a structure of a 5 × 7 dot matrix for the interpretation of English, symbols, and Korean. It is an object of the present invention to provide a liquid crystal display device and a display method for both English and Korean, as long as the structure uses a 10 × 14 dot matrix in which four 5 × 7 dot matrices are vertically and horizontally combined for Hangul collection.

Hereinafter, a display apparatus and a display method of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a display device of the present invention, as shown therein, a keyboard unit 11 for inputting character key signals and various operation function signals, and various operations according to output signals of the keyboard unit 11. A central processing unit 12 for controlling operations such as functions and character display, a data / program memory 13 for storing and outputting various data and operation programs, and a character generating memory for storing and outputting patterns of various characters ( 14), a liquid crystal display driver 15 for displaying various characters and symbols on the display unit 16 under the control of the central processing unit 12, and a printer driver for operating the printer under the control of the central processing unit. It consists of (17).

In the block diagram of the display device of the present invention configured as described above, when a character key signal is input to the central processing unit 12 through the keyboard unit 11, the central processing unit 12 outputs the input character key signal to the data / program. It is applied to the memory 13 and converted into a standard code.

The CPU 12 fetches the pattern of the character corresponding to the converted standard code from the character generation memory 14, outputs it to the liquid crystal display driver 15, and inputs it to the display unit 16. The character according to the key signal is displayed.

At this time, in the present invention, as shown in FIG. 2, the display unit 16 is composed of a 5 × 7 dot matrix for English and Korean simplification, and four 5 × 7 dot matrices are used for the Hangul collection. It consists of a 10 x 14 dot matrix composed of two horizontally each. Here, the digits 21 to 25 show a 5 by 7 dot matrix for displaying the Hangul and English digits, and the digit 26 shows a 10 by 14 dot matrix for displaying the Hangul writing of Korean characters. As shown in FIG. 3, for example, a state displayed according to each type of Hangul gathering in the digit 26 of the 10 × 14 dot matrix is shown.

It will be described the Hangul Hangul writing and collecting method of the present invention.

4 shows an example of the basic font of the characters stored in the character generator memory 14 to display the Hangul in the digits 21 to 25 for Hangul Hangul. (A) shows the basic font of the consonant. , (B) shows the basic font of the vowel. In the character generation memory 14, the respective basic fonts shown in (a) of FIG. 4 are stored as binary coded data, and in the write-out digits 21 to 25, the character generation memory 14 is stored. The stored data is directly applied to and displayed on the liquid crystal display driver 15, and is displayed in the same manner as shown in FIG.

In the case of displaying Hangul in the Hangul digits 26 for displaying Hangul writing, the data of the basic font for Hangul writting according to the display form of Hangul shown in FIG. 3 is displayed on the X-axis in the data / program memory 13. And reconstructed by shifting on the Y axis, the reconstructed data is transmitted to the liquid crystal display driver 16 and displayed on the display unit 16.

Here, the distances in which the data of the basic font is moved on the X-axis and the Y-axis according to each type of Hangul writing as shown in FIG. 3 are shown in the following table.

TABLE 1

Therefore, in the case of Hangul Hangul writing, as shown in the above table, the basic fonts of consonants and vowels shown in (a) of FIG. 4 are positioned on the X-axis and Y-axis according to the form of the writing. By moving, the characters of FIG. 3 are displayed on the digit 26 of the Hangul alphabet writing composed of a 10 × 14 dot matrix.

FIG. 5 shows binary data displayed, for example, the "Song" of D-shape shown in FIG.

According to the Hangeul type, the positional movement may be regulated as shown in the above table so that the basic font data of the initial, neutral, and final species may be moved and written to the corresponding data memory location.

A method for displaying the Korean and English characters is described with reference to the signal flow diagrams shown in FIGS. 6 and 7.

When power is applied to the system, an initial setting is made to match the characteristics of each system in step 31, and a key scan is performed in step 32 to wait for key input.

At this time, if a key signal is input from the keyboard unit 11 to the central processing unit 12 in step 33, the key signal input in step 34 is converted into standard key data in the data / program memory 13. Then, this standard key data is discriminated, and if it is the request for the function processing in step 35, the function processing according to the key signal is performed in step 36. If it is not the function processing, it is determined whether it is the Hangul mode in step 37. If it is not the Hangul mode, it is processed in English in step 38. In the case of the Hangul mode, the Hangul process is performed in step 39.

In this case, in the case of Hangul, a Hangul process routine is performed to proceed with the initial writing, neutral, and final writing programs. When the Hangul and English processing is completed, a display routine is performed in step 40 and displayed. While controlling the print driver 17, data according to the input key signal is processed.

In the display routine, when the central processing unit 12 completes the Hangul writing in step 51 as shown in FIG. 7, the display data / program memory 13 used for Hangul writing in step 52 is completed. ), And in step 53, the Korean data to be collected and written to the 10 × 14 dot matrix is processed and displayed.

In step 54, the Hangul decode data and the English display data are processed and displayed, and in step 55, the data is transmitted.

As described in detail above, according to the present invention, when displaying 10 characters, 8+ (5 × 9) + (5 × 4) = 73 wires are required when the number of contacts connected between the LCD substrate and the LCD is 16 × 16 dot matrix. The structure of the LCD substrate can be simplified as well as miniaturized. In addition, the size of memory per character requires 2 × 16 = 32 bytes for a 16 × 16 dot matrix, but up to 7 bytes for a 5 × 7 dot matrix, reducing the cost of reducing display memory capacity. The production yield can be improved by simplifying the structure.

Claims (2)

As long as the keyboard unit 11, the central processing unit 12, the character generating memory 14, the liquid crystal display drive unit 15, and the print driver unit 17, the English, symbols and A display unit 16 having a 10 × 14 matrix for Hangul writing, which combines a 5 × 7 dot matrix for Hangul writing and four 5 × 7 dot matrices vertically and horizontally, and a Hangul for Hangul writing. And a data / program memory (13) for locating and combining the data for decompression of the data, and the central processing unit (12) collects data of the basic font stored in the character generation memory (14) when the Hangul is written. Directly output to the liquid crystal display driving unit 15 to be displayed on the display unit 16, and in the case of Hangul Hangul writing, the data / program according to the Hangul type for collecting Hangul Hangul data. As long as the position shifted to the X-axis and Y-axis in the memory (13) to combine and then display on the display unit (16), the dual-use liquid crystal display device. In the Korean-English combined display method, a method for converting an input key signal into data, performing a function processing when the input key signal is a function processing request, and inputting the key signal If it is not a function processing request, Hangul mode performs Hangul processing routines to perform Hangul writing function of initial, neutral, and trailing characters, and displays them when Hangul or English processing is completed. Liquid crystal liquid crystal display method.

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