基于Qt的汽车液晶仪表字符显示系统设计  

Design and Realization of Character Display System of Automobile Liquid Crystal Instrument Based on Qt

作　　者：郭健忠[1] 杜新宝 谢斌 闵锐 胡文龙 许小伟[1] GUO Jian-zhong;DU Xin-bao;XIE Bin;MIN Rui;HU Wen-long;XU Xiao-Wei(School of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430065,China;Wuhan Baohua Display Technology Co.,Ltd.,Wuhan 430082,China)

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430065 [2]武汉保华显示科技有限公司,湖北武汉430082

出　　处：《计算机技术与发展》2022年第5期182-188,共7页Computer Technology and Development

基　　金：国家自然科学基金项目(51975426);武汉市科技计划项目(2019010701011393)。

摘　　要：随着液晶显示技术在汽车仪表行业的广泛应用,仪表界面融入了大量以字符形式呈现的行车信息。因此,为满足部分液晶仪表开发过程中液晶屏显示方向的灵活布局设计,解决液晶仪表字符信息显示时,点阵字库显示方法出现的适用性差、显示效果不佳,以及植入图形库方法带来的开发效率低、占用存储空间大的问题,提出了单字符图片化的设计,实现了专用字库的编码与自动生成功能。参考UTF-8字符编码规范,建立字符图片资源与文件内字符信息的映射关系,并开发了基于Qt的字库生成工具,提供可批量生成的字符解析文件代码,起到优化字符调用程序结构的作用。在此基础上,通过设计字符信息显示软硬件系统,实现了仪表字符显示系统的功能开发。经测试表明,该系统方案达到了提高字符信息显示灵活性、增强字体显示效果、缩短开发周期以及节省存储空间的效果。With the widespread application of liquid crystal display technology in the automotive instrument industry, the instrument interface incorporates a large amount of driving information presented in the form of characters. Therefore, in order to meet the flexible layout design of the LCD screen display direction during the development of some LCD instruments, and solve the problem of the poor applicability and poor display effect of the dot matrix font display method and low development efficiency and large storage space brought by the method of embedding graphics library when the LCD instrument character information is displayed, a single-character graphic design is proposed, which realizes the coding and automatic generation function of a special font library. Referring to the UTF-8 character encoding specification, we establish the mapping relationship between character image resources and character information in the file, and develop a Qt-based font generation tool, providing character parsing file codes that can be generated in batches and optimizing the structure of character calling programs. On this basis, by designing the character information display software and hardware system, the functional development of the instrument character display system is realized. Tests show that the system scheme has achieved the effects of improving the flexibility of character information display, enhancing the font display effect, shortening the development cycle and saving storage space.

关 键 词：液晶仪表 QT 字库 图片化 字符显示 

分 类 号：TP302[自动化与计算机技术—计算机系统结构] TH85[自动化与计算机技术—计算机科学与技术]