JPS6232496A - Liquid crystal display controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display controller, and more particularly to a liquid crystal display controller that displays text in a dot pattern on a liquid crystal display panel.

[Conventional technology]

Conventionally, in this Oshi LCD controller, C is a character code.The dot pattern of the character generator corresponding to the character code in the memory is stored as it is in the display data memory, and the recorded dot pattern is stored in the third memory.
It was displayed on the liquid crystal display panel as shown in the figure.

[The problem that the invention is trying to solve]

In the conventional substitute display controller described above, characters are generated as dot patterns from a character generator corresponding to character codes in a fixed matrix of dots (for example, 5 in width).
It is expressed as 7 bits x 7 bits in height) and is displayed on the liquid crystal display panel with a constant character width a. In this display, for example, if there is a small character such as character 1, there is an unnecessary space between adjacent characters, which is not desirable in terms of visibility and readability. .

[Failure to solve the problem]

The liquid crystal display controller of the present invention is a liquid crystal display controller that controls a liquid crystal display panel to display a dot pattern of characters corresponding to a character code on the liquid crystal display panel, and includes a character code memory that stores a one-character code, and a character code memory that stores a one-character code; A character generator that generates all dot patterns of characters corresponding to a character code from a character code memory, an auxiliary data memory that stores information indicating the width of a character corresponding to the character code, and a dot pattern and auxiliary data from the character generator. A data calculation unit that performs arithmetic processing and obtains a dot pattern based on the information indicating the character @ next to the data memory; a display data memory address generation unit that generates all addresses based on the calculation results of the data calculation unit; The dot pattern of the above calculation result? It has a display data memory.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, one embodiment of the present invention is a liquid crystal display controller that displays characters on a liquid crystal display panel 17, and includes a character code memory 11 that stores character code data, and a character code that corresponds to character codes sequentially output from the character code memory 11. It includes a character generator 12 that generates a character dot pattern, and an auxiliary data memory 13 that stores information indicating the lateral part of the character corresponding to the character code.

The character code memory 11 is configured to store, for example, 8-bit character codes. The character generator 12 stores dot patterns of characters represented by a dot matrix composed of, for example, 5 bits x 7 bits, corresponding to each character code. The auxiliary data memory 13 contains information indicating the width of characters, for example, characters with wide characters.

V, S, 0. It is configured such that 1ltA indicating N and information B indicating a narrow character width are stored. The data calculation section 14 is connected to the character generator 12 and the auxiliary data memory 13, inputs the dot pattern from the character generator 12 and information indicating the horizontal mk of the character from the auxiliary data memory 13, and performs arithmetic processing between them. , and supplies the result of the calculation to the display data memory address generation section, and also supplies the dot pattern resulting from the calculation of the dot pattern from the character generator 12 to the display data memory. The display data memory 16 stores a dot pattern as a result of arithmetic processing on the address generated by the display data memory address generation section 15, and stores this dot pattern on the liquid crystal display panel 1.
It is configured to be displayed on 7.

FIG. 2 is a diagram showing display characters in one embodiment of the present invention. In FIG. 2, if a character on the liquid crystal display panel 17 has a width of 5 dots and a height of 7 dots, it is represented by a dot pattern with a character width of a, but a character with a narrow width such as III is represented by a dot pattern with a width of 3. × height is 7 dots, and the character width is represented by a dot pattern.

Next, the operation of this embodiment will be explained. First, a series of character codes are stored in the character code memory 11. This character code is retrieved character by character from the character code memory 11 and supplied to the character generator 12 and the auxiliary data memory 13. The character generator 12 generates a dot pattern corresponding to the character code that has been completed manually, and supplies the dot pattern to the data calculation section 14.

On the other hand, the auxiliary data memory 13 sends out information B with a narrow character width or information A with a character width of 1 mm corresponding to each character code, and supplies it to the data calculation section 14. In the data calculation unit 14, the character generator 1
2. Perform calculation processing on the dot pattern (5 dots in 1 x 7 dots in height) read from 2, and for characters with narrow widths, use them as information B and omit the 1 dots at both ends in the width direction.
A dot butter is created so as to be represented by 3 dots in width and 7 dots in height, and the calculation result is supplied to the full display data memory address generation section 15. The display data memory 16 stores the dot pattern created by the arithmetic processing section 14 using the address generated by the display data memory address generation section 15. Therefore, since the display data memory 16 stores the dot pattern created corresponding to the display position, the liquid crystal display panel 17 can adjust the character spacing even for characters with different character widths, as shown in FIG. is displayed while keeping it at a constant distance C.

〔Effect of the invention〕

As explained above, the present invention provides the auxiliary data memo IJ't- which stores the width of the character corresponding to the valley character, so that the dot pattern of a small character of 1 meter width, such as the character ■, is provided. By shortening the horizontal @, it is possible to realize an easy-to-see and readable display without creating unnecessary spaces between 14 adjacent characters.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing characters displayed in an embodiment of the invention, and FIG. 3 is a diagram showing characters displayed in a conventional display device. 11...Character code memory, 12...
Character generator, 13... Auxiliary data memory, 14... Data calculation section, 15...
...Display data memory address generation section, 16...
-Display data memory, 17...Liquid crystal display panel.

Claims (1)

[Claims] A liquid crystal display controller that controls a liquid crystal display panel and displays a dot pattern of characters corresponding to a character code on the liquid crystal display panel has a character code memory that stores character codes and corresponds to character codes from the character code memory. a character generator that generates a dot pattern of a character, an auxiliary data memory that stores information indicating the width of a character corresponding to the character code, and a dot pattern from the character generator and a width of the character from the auxiliary data memory. a data calculation unit that performs calculation processing to obtain a dot pattern based on information; a display data memory address generation unit that generates an address based on the calculation result of the data calculation unit; and a display that stores the dot pattern of the calculation result based on the address. a data memory, and is arranged to display dot patterns from the character generator on a liquid crystal display panel in accordance with information indicating widths of characters stored in the auxiliary data memory. .