基于DLP的微型投影仪驱动电路设计与实现

发布时间：2018-03-31 12:10

  本文选题：微型投影仪　切入点：LED驱动电路　出处：《电子科技大学》2014年硕士论文

【摘要】：随着现代战争呈现出来的新的变化和发展趋势,实时、详细的军事信息在军事战略防御、战略布局、行军布阵等方面已经发挥着不可替代的重要作用。由于常规的纸质军事地图提供的信息有限、可查阅的地理区域较小,已不能满足现代战争特别是野战环境的需要。因此,迫切需要发展信息存贮量大、体积小、重量轻、耗电少、适用于野战条件的电子地图信息显示系统。微型投影仪成为电子地图显示的首选工具。本文基于嵌入式技术与DLP技术设计出微型投影仪的硬件平台,该硬件平台能够完成投影或显示必要的地理信息,也能够在必要的情况下,显示其它作战信息。在该平台上,分析研究并解决了微型投影仪的3个关键技术:LED驱动电路设计、低功耗电源电路设计、DMD驱动技术,经过最终测试验证,本文设计的微型投影仪硬件平台与驱动电路满足设计要求。本文主要研究内容如下:1.基于嵌入式技术与DLP技术研究并设计出微型投影仪硬件平台、投影步骤以及各个模块的功能。硬件平台包括包括嵌入式微处理器为核心控制模块、DLP组合芯片为数字光处理模块、视频处理模块、电源转换模块和必要外设接口。投影步骤包括视频输入、视频解码、视频格式转换、数字光处理和投影。2.对微投系统的三个子系统涉及的关键技术作了详细的研究,分别为:LED驱动电路设计、低功耗电源电路设计以及DMD驱动技术。LED驱动电路不但要为LED光源提供足够驱动电流,还要结合PWM技术实现对LED亮度的调节。低功耗电源电路除了为系统提供正常的供电外,还要实现低功耗设计,即电源系统受系统控制,通过工作在不同模式下达到节能低功耗。DMD驱动技术实现对光机的正常驱动,通过对DLP芯片的正确配置实现对输入视频的有效投影。最后,结合设计的样机对系统的各个功能模块进行验证分析。通过测试验证,本文所设计的微型投影仪系统硬件平台及相关驱动电路工作正常,达到设计要求。
[Abstract]:With the new changes and development trends of modern warfare, real-time, detailed military information in military strategic defense, strategic layout, Marching has played an irreplaceable and important role. Due to the limited information provided by conventional paper military maps and the relatively small geographical areas that can be consulted, they can no longer meet the needs of modern warfare, especially the field environment. There is an urgent need to develop large quantities of information, small size, light weight and low power consumption, The electronic map information display system suitable for the field condition. The miniature projector becomes the first choice tool of the electronic map display. This paper designs the hardware platform of the miniature projector based on embedded technology and DLP technology. The hardware platform can project or display necessary geographic information, and display other operational information if necessary. On this platform, three key technologies of the micro projector are analyzed and solved. Low power supply circuit design DMD drive technology, after the final test and verification, The hardware platform and driving circuit of the micro projector designed in this paper meet the design requirements. The main contents of this paper are as follows: 1. Based on embedded technology and DLP technology, the hardware platform of micro projector is designed. The hardware platform includes an embedded microprocessor as the core control module, a DLP combination chip as a digital optical processing module, a video processing module, and a video processing module. Power conversion module and necessary peripheral interface. Projection steps include video input, video decoding, video format conversion, digital optical processing and projection. The design of the drive circuit for DMD, the low power supply circuit and the drive circuit for DMD not only provide enough driving current for the LED light source, but also provide enough driving current for the LED light source. The low power supply circuit not only provides the normal power supply for the system, but also realizes the low power design, that is, the power system is controlled by the system. Through working in different modes to achieve energy saving and low power. DMD drive technology to achieve the normal drive of optical machine, through the correct configuration of DLP chip to achieve the effective projection of input video. Finally, Through the test and verification, the hardware platform and the related driving circuit of the micro projector designed in this paper work normally, and meet the design requirements.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN946.1
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本文编号：1690677