Thermal printing method based on display framework

Abstract

The invention discloses a thermal printing method based on a display framework. The method comprises the steps that a printing service module receives a printing request of an application terminal and submits printing information in the printing request to a printing-display conversion module; the printing-display conversion module calls a display service module of the application terminal to convert the printing information into display information; the display service module calls a display processing framework of the application terminal to perform lattice cache processing on the display information so as to generate a display lattice cache; a lattice conversion module intercepts the display lattice cache output by the display processing framework; if the display lattice cache is generated according to a display request, the display lattice cache is sent to a displayer for graphic display; and if the display lattice cache is generated according to the printing request, the display lattice cache is sent to a printer for printing. By the adoption of the thermal printing method, matching import of various matrix files can be omitted, the work of repeatedly editing, developing and printing word bank lattice files is omitted, and product cost is lowered.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a thermal printing method based on a display frame. Background technique [0002] Thermal printing technology was first used in fax machines. Its basic principle is to convert the data received by the printer into dot matrix signals to control the heating of the thermal unit, and to heat and develop the thermal coating on the thermal paper. [0003] Today, with the increasing demand for thermal printer applications, many Android devices use thermal printers to print various types of receipts, but thermal printers print in the form of dots, and all text and pictures are It needs to be issued in the form of dot matrix. The existing thermal printing technology solutions mainly include the following two types: [0004] (1) Directly use the hardware font chip. The hardware font chip stores the text dot matrix of a specific language or a specific coding range. When printing, the dot...

AI Technical Summary

Problems solved by technology

This solution is relatively simple to implement, but it needs to increase the hardware cost, and the hardware font chip font library is relatively simple. Due to the problem of storage space, the support for multi-language or large fonts will significantly increase the cost, and the change in demand for printing fonts will directly lead to Hardware changes, higher hardware costs

[0005] (2) By extracting the font dot matrix from various existing font files for printing, this method directly forms the print font file and puts it on the Android system. The text in the font file that does not meet the requirements needs to be re-edited. The addition of a language requires the modification of the software code, and a language has a variety of font files. For example, in Chinese character printing, there are such font code tables as GB2312 and GBK, and various font templates such as HeiTi and SongTi. There are a lot of font files to meet different needs, and the development and maintenance costs are high

[0006] Therefore, it will be very time-consuming to match the original technical solution with the new language. For some special languages ​​that involve typesetting and deformation conversion problems, it will also increase the difficulty of R&D matching and increase development and maintenance costs.

At present, there is no technical solution that is efficient, stable, easy to use, and highly reusable on Android thermal printing terminal devices.

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