Method for displaying user-defined symbols and graphs on liquid crystal module on basis of RA8870 controller

A technology of RA8870 and display method, which is applied in the direction of instruments, static indicators, etc., can solve the problems of sparse character font display dot matrix, font expansion, unable to meet the diversified display of different styles of fonts, etc.

Inactive Publication Date: 2012-06-27
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of Chinese character display, it supports 16×16 dot full font display mode, because the Chinese character font library ROM usually stores the font dot matrix library of one font, which cannot meet the needs of diversified display of different styles of fonts; in addition, although the RA8870 Under the controller, the displayed characters can be magnified by a fixed multiple, but due to font expansion, the character font display dot matrix becomes sparse and lacks aesthetic feeling. On the other hand, it cannot meet the user-defined character and graphic display requirements

Method used

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  • Method for displaying user-defined symbols and graphs on liquid crystal module on basis of RA8870 controller
  • Method for displaying user-defined symbols and graphs on liquid crystal module on basis of RA8870 controller
  • Method for displaying user-defined symbols and graphs on liquid crystal module on basis of RA8870 controller

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Embodiment Construction

[0030] According to the technical solution of the present invention, realizing the method of the present invention specifically includes creating font lattices of custom characters or graphics, sub-module segmentation of font lattices, loading of sub-modules into CGRAM, and display of custom characters and graphics.

[0031] Described font dot matrix creation method is:

[0032] Custom characters or graphics must be converted into font lattices, and the lattice dimension is M×N, where M is an integer multiple of 16, and N is an integer multiple of 8. Let m=M / 16, n=N / 8.

[0033] A font dot matrix of a custom Chinese character such as figure 1 as shown, figure 1 The custom font is the 32×32 dot matrix of the Chinese character "Snow" in cursive script. The black dot in the figure is the display part, and vice versa when it is displayed in reverse color. When constructing font dot matrix, if M and N cannot meet the requirements of integer multiples of 16 and 8, make up with n...

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Abstract

The invention discloses a method for displaying user-defined Chinese characters and graphic symbols, which have random sizes, on a liquid crystal display module on the basis of an RA8870 controller. The method comprises the following steps of: constructing the user-defined characters or graphic symbols by using a font dot matrix method, dividing user-defined character dot matrix fonts into 16*8 half-font sub-modules on the basis of 16*8 half-font and 16*16 full-font basic display modes of the RA8870 controller, and carrying out encoding; in the displaying process, according to structural features of the fonts and a drafted sequence, sequentially reading the font sub-modules into a CGROM (Chinese Character Generation Read Only Memory) of the RA8870 controller; then designating a display initial position and calculating a display coordinate position of each font sub-module according to the structures of the user-defined characters or graphs by using a display position calculation formula; and realizing font matching of the displayed characters in different calling modes and displaying the complete characters and graphs on the liquid crystal display module.

Description

technical field [0001] The invention belongs to the technical field of Chinese character display of a color liquid crystal display module, and in particular relates to a method for displaying Chinese character characters and graphic symbols of any size defined by users of a liquid crystal display module based on an RA8870 controller. Background technique [0002] At present, TFT liquid crystal display modules are light in weight, thin in thickness, less in radiation, and digitized, and are widely used in the field of intelligent instruments and meters. On smart instruments, liquid crystal display modules are used to display monitoring parameter values, real-time parameter curve display, and provide alarm information. Therefore, text or symbol prompts with different fonts and sizes are essential. [0003] The RA8870 controller is a text / graphics TFT LCD controller produced by RAiO Technology Inc., which supports digital or analog TFT LCD modules with a resolution of 640×480 d...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G09G3/36
Inventor段晨东秦刚代杰
OwnerCHANGAN UNIV