电感传感器金属探测定位系统设计

本文以 LDC1000电感传感器以及飞思卡尔 Kinetis 系列微控制器 K60为核心,组成具有定位功能的金属探测系统。通过金属的涡流效应,对金属物体进行检测,能够在一定范围内迅速定位出金属物体的精确位置。经实验表明,距离物体中心定位误差不超过4 mm,最小可以检测出2 cm2大小的金属物体。测量数据在单片机中进行处理,软件上采用了数字滤波,进一步减少了误差干扰信号,提高了系统的稳定性与精确性。该系统可通过 LCD 液晶显示屏显示当前金属物体所在具体位置,并利用按键实现人机交互。     

Thermal management of edge‐lit wide color gamut backlight for LCD using red laser diodes and cyan LEDs

The color gamut is one of the critical parameters that dictate the image quality of displays. The liquid crystal displays using white color light‐emitting diodes (LEDs) as the backlight, though having been widely employed recently, are not very satisfactory in terms of their color gamut because of the broad spectrum inherent to white LEDs. This prompted the authors to develop improved liquid crystal displays using an edge‐lit wide color gamut backlight that used red laser diodes and cyan LEDs. Generating laser beams with high color purity, the laser diodes are light sources with a significant effect on expanding the color gamut. However, laser diodes, red ones in particular, have unfavorable thermal characteristics. To cope with this shortcoming, the authors clearly defined the restrictive criteria for laying out two kinds of light source on the edge‐lit backlight and made a prototype 55‐type laser backlight for performance evaluation.     

基于nRF24L01、单片机的小区远距离无线传呼

介绍了基于nRF24L01无线通信模块实现远距离传呼,将传呼信号经过单片机处理,通过无线模块发送数据,另外一个无线模块接收数据并通过单片机处理,实现传呼及显示呼叫所在楼层。     

基于LPC3250的微型投影系统设计与实现

本系统以高性能ARM9处理器LPC3250为核心,HX88xx为LCOS驱动芯片。HX70xx为LCOS模块,LQ035Q1DG01为LCD模块,建立μC／OS-Ⅱ嵌入式实时操作系统,通过红外控制实现系统在投影仪和LCD之间切换。本文重点阐述了系统主要接口硬件电路的设计和系统软件的实现。实现了寿命长、成本低、可靠性高的便携式微型投影系统的设计。     

单片机汉字显示系统的设计

设计了一种以AT89C51单片机为核心、ST7920为控制芯片、液晶显示器YM12864R为显示部分的液晶汉字显示系统,对汉字点阵字模的提取流程进行了分析和实验.系统具有调用内置字库和自定义字库的汉字显示功能,显示方便快捷,有很好的实用价值.     

基于嵌入式μC/GUI的图形特技应用研究

μC/GUI是一种用于嵌入式应用的图形支持软件,它给任何使用图形LCD的应用程序提供了一个不依赖于处理器和LCD控制器的图形用户接口.主要提出了μC/GUI的硬件平台构建,讨论了ARM7芯片S3C44BOX与LM7M632的硬件接口和软件设计,并在此基础上提出了一种基于嵌入式μC/GUI实现的图形特技算法,最后给出了实验结果.     

基于Framebuffer 的DSP 平台LCD 驱动程序的实现与应用

论述了在uClinux 中基于Framebuffer 的LCD 驱动程序的实现方法。首先主要介绍Framebuffe的处理机制以及底层驱动的接口函数,并在ADSP-BF561 平台上进行了具体实现;其次在Framebuffer 的基础上,简要介绍了嵌入式图形用户接口MiniGUI,并在ADSP-BF561 平台上进行了移植;最后通过实际效果测试,验证了工作的正确性。并将其应用于无线网络视频监控系统中的人机接口中。     

I2C总线在指纹识别系统键盘显示中的应用

针对大多数嵌入式系统键盘显示电路复杂、不灵活、维护困难等问题,结合指纹识别系统在汽车安全领域的应用,介绍了基于I2C总线的数码管显示驱动和键盘扫描控制芯片CH452S以及扩展口器件PCF8574AP在指纹识别系统键盘显示接口中的应用,包括硬件电路连接和软件程序设计.采用I2C总线,不仅占用端口资源少,电路结构简单,而且易于电路扩展与系统升级.     

A study of roll‐printing technology for TFT‐LCD fabrication

Abstract— Recently, potential breakthrough technologies for low‐cost processing of TFT‐LCDs and new process developments for flexible‐display fabrication have been widely studied. A roll‐printing process using etch‐resist material as a replacement for photolithographic patterning was investigated. The characterization of the properties of patterns formed in roll printing, a method to fabricate cliché plates for fine patterns, and the design of a new formulation for resist printing ink is reported. The pattern position accuracy, which is one of the most important issues for the successful application of printing processes in display manufacturing was studied and how it can be improved by optimizing the blanket roll structure is explained. New design rules for the layout of the thin‐film‐transistor array was derived to improve the compatibility of roll printing. As a result, a prototype 15‐in.‐XGA TFT‐LCD panel was fabricated by using printing processes to replace all the photolithographic patterning steps conventionally used.     

A new optical elasticity resin for mobile LCD modules

Abstract— The display used in current cell phones has an air gap between the cover glass and the liquid‐crystal‐display (LCD) module to prevent the LCD glass from being damaged. Reflections at the boundaries of the air gap cause a reduction in the LCD luminance and contrast. To address this problem, a newly proposed LCD structure has been investigated. The “Super View Resin (SVR),” a transparent elastic resin which improves the shock resistance and visibility of the LCD, has been developed. Filling the air gap between the cover glass and LCD module with a refractive‐index‐matching resin solves the light‐reflection problem inherent in the use of a reinforced cover‐glass lens. Moreover, the elastic filler works as a damper, reducing any external shock, which prevents not only the cover glass and LCD module from being damaged, but also the glass from being shattered when it is broken.