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本文描述了一个基于可编程逻辑器件的全彩LED显示系统的设计的过程,这个系统能够基于硬件产生LED更多颜色灰度.详细分析了其工作原理,并依据其原理,设计出了基于FPGA的控制电路. 相似文献
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MC14489是MOTOROLA公司生产的LED显示驱动器.它通过同步串行口和微处理器通信.接口时序与MOIOROIA SPI和NATIONAL.MICROWIRE串行数据口兼容.它的内部具有数据保持、译码和扫描电路.可直接驱动阴极LED数码管及发光二极管,减少了处理器在显示方面的开支,并简化了电路设计、它唯一的辅助元件是一个电流设置电阻.单独的一片MC14489可驱动5位共阴极LED数码管或多达25只发光管.通过设定片内的配置寄存器值还可提供其它一些更加灵活的显示方式.片内译码器可输出7段式的数码O~9,十六进制数字A~F,还有其它15个字母或符号. 相似文献
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本文介绍一种基于函数变换思想的大屏幕显示电路,分析了系统实现的电路框图和函数变换的思想方法。 相似文献
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本文用FPGA设计LED显示屏接收控制系统,着重研究系统硬件设计方案,进一步解决了LED大屏幕数据的灰度控制、外扩存储器的性能要求及实现方式.用QuaItusⅡ软件开发各个模块,QuanusⅡ软件提供的人性化的界面操作,很多模块都可以在系统内直接实现,方便实用. 相似文献
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本文根据目前LED频谱曲线的具体情况,对LED户外全彩色显示屏像素中红、绿、蓝三种颜色LED的数量比例进行了深入的探讨,并结合实际工作进行详细的讨论。 相似文献
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TinyX窗口系统被广泛应用于嵌入式系统,移植TinyX窗口系统的首要任务是显示驱动的移植.对TinyX窗口系统基于FrameBuffer的显示机制进行了分析,以ADV7179作为ARM平台的显示芯片,提出了将TinyX窗口系统的显示驱动移植到该平台上的解决方案,对TinyX窗口系统在不同平台下的移植有很好的借鉴价值. 相似文献
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用隔列传输方法实现LED大屏幕的视频通讯 总被引:2,自引:0,他引:2
介绍了图像传输的一种方法。利用隔列传输的方法实现LED大屏幕的图像通讯,缓解了通讯压力,提高了长线传输的可靠性。使用该方法,能够在基本不增加硬件电路和通讯电缆开支的条件下,使工作频率降低一倍。并克服了以往传输的弱点,提高了图像传输的可靠性。 相似文献
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LED显示在单片机系统中应用广泛,它能够直观地向人报告系统运行状态与结果.论述单片机应用系统中LED显示译码驱动电路的几种实现方案,比较每种方案各自的优缺点,着重介绍了专用显示驱动芯片MAX7219的工作原理与应用方法,指出专用译码驱动芯片在单片机系统显示应用中的广阔前景. 相似文献
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Jan-Patrick Elsholz Guido de Melo Marc Hermann Michael Weber 《Pervasive and Mobile Computing》2009,5(5):592-605
Ambient displays provide us with information in the background of our awareness. However, as each user has individual wishes and needs of how, which and when information is presented, the acceptance of ambient displays is low.In this paper we introduce an extensible architecture for personalized ambient information.We employ a notification system to extend the capability of a fixture to display more than one variable. Multiple variables can be updated by multiple information providers. Thereby, our architecture covers a broader spectrum of notifications from alarms to ambient information.We evaluate our concept within a dual-task experiment in comparison to preset notifications. The results show a level of self-interruption which is significantly lower than using preset notifications. Therefore our approach outperforms preset notifications and moves ambient displays closer to secondary displays in human–computer interaction. 相似文献
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《Journal of Visual Languages and Computing》2014,25(6):676-683
Existing desktop virtualization systems suffer from a very limited performance in replaying high-definition videos remotely: intolerable CPU and bandwidth consumption, high response delay and poor video quality. In this paper, we propose an original-stream based solution to provide good user experience for replaying high-definition videos in desktop virtualization systems without any modification on applications and support most of prevalent high-definition video formats. In our solution, server׳s video content is not decoded on server but intercepted and delivered to client in its originally encoded state, so that the video content can be easily stored and transported in computer systems with high quality and low bandwidth. The encoded video content is intercepted in server׳s display driver, which enables HDR to work seamlessly with existing applications. The extremely CPU-intensive video decoding tasks are executed on client by using GPU-accelerated video decoding technology so that CPU can concentrate on other tasks. The experimental results validate our method and show that this proposed approach measurably outperforms state-of-the-art solutions. 相似文献
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以8×8点阵为基础,设计了一个动态移位显示屏。全屏由20块8×8点阵LED显示模块组成,显示采用动态显示,使文字或图形能实现静止、移入移出等多种显示方式。文中详细介绍了LED点阵显示的显示原理、硬件设计和软件设计。 相似文献