LED数字视频颜色查找表的几种方法及实现

在数字视频和多媒体领域里,由于查找表占用容量小,可以高效快速地实现各种数据转换被大量采用,在LED杉色显示屏系统中亦同样显示了其强大的功能,本文详细地讨论了颜色查找表的几种实现方法,在应用中取得了很好的效果     

氨氮测定仪光源的比较研究 项目名称:比色法氨氮测试光源效果研究

在全自动氨氮测定仪的设计中,光源的选择至关重要.本文对几种常用光源的原理及主要特性等进行了分析和比较,并以LED和空心阴极灯为光源进行了对比实验,验证了钙空心阴极灯作为氨氮测定仪光源的可行性.本文的分析对设计氨氮测定仪时光源的选择具有一定的参考价值.     

The Permeability of Packaging Board in Pairs Organic Solvents

Packaging materials occupy an important place in modern society. Quality packaging "sells" goods, carrying information, artistic and stored functions. Among all kinds of packing the most in demand for packaging papers and boards based on plant fibers, due to environmental and economic reasons. At the same time offers a great variety of materials often makes it difficult for the optimal choice of packaging materials.       

LED在冰雪景观照明应用的需求特点

从不同的角度,总结了LED在冰雪景观照明应用的各种需求,为LED冰雪景观照明在今后的推广应用提出了指导性技术要求。     

LED照明技术在矿灯设计中的应用

本文采用最新的白光LED,专用LED驱动芯片和锂电池充电控制芯片设计矿灯,并对设计的产品进行了测试。可以看出,以LED作为光源设计出的矿灯具有照明效果好,使用时间长,寿命长,轻便小巧,免维护的优点,相对传统矿灯的优势明显。是煤矿行业的革命性产品。     

点阵LED电子显示屏控制系统设计

利用AT89S52作为主控制芯片,给出简单实用的外围电路来驱动16×16的点阵LED显示屏的设计方案,包括系统具体的硬件设计方案和各个外围电路部分的设计等方面.     

LEDs as a tool to enhance faded colours of museums artefacts

A procedure to enhance the faded colours of museums artefacts is presented. The method is based on adjusting the spectral profile of the light while maintaining a given white colour of the illumination. The procedure is tested using colour LED clusters and a series of damaged samples and their good condition counterparts. The intensity of the three components of four feasible LED clusters is computed in order to produce white illumination metameric to a white LED light source taken as a reference. Colorimetric calculations are performed to model the colour changes undergone by target colour samples using illumination based on colour LED association with respect to the white LED reference. The model is based on CIELAB specification and allows to optimize the choice of three-colour LED associations that modify the hue and the saturation of a few target colour areas of illuminated samples while other areas are left moderately desaturated. Modelling and experimental visual validation were practically obtained by adjusting the intensity of five calibrated colour LEDs, blue, cyan, green, amber and red, accommodated in a light booth. A visual validation was conducted asking 20 observers to rate the colourfulness appearance of aged inkjet prints under every LED cluster with respect to the colourfulness of their original counterparts under the reference white LED source. The visual assessments agreed with the colorimetric predictions. Finally, a demonstration is shown of the feasibility of the method by simulating the rejuvenated appearance of a natural history specimen of which the museum possesses two differently aged items.     

高职数字图文信息处理技术专业模块化教学的实践探索

伴随经济产业结构调整,传统产业与“互联网+”“创新创业”等多领域交叉、融合,推动着产品包装设计不断向多元化、专业化、精准化方向发展。因此,围绕高职院校培养兼具知识型、技能型和“工匠精神”的人才培养目标,从产品包装设计教学过程中“教”与“学”的视角出发,从企业的需求着手,提出有针对性的模块化教学课程,优化课程结构与设置,以更好地服务于校企合作,使高职学生的专业技能学习更具针对性和有效性。     

自然元素在旅游产品包装设计中的应用

在旅游特色产品商业化的今天,旅游产品的包装设计渐渐失丢失了地域性和民俗性。而对异域文化的认同和喜爱是人们购买和收藏旅游产品的主要心理。本文从设计的方法论的角度出发,分析在旅游产品包装设计中利用自然元素能产生的效果。同时说明了收集自然元素进行提炼,并加工和整合用于有特色的产品包装设计,能使旅游产品的文化内涵与艺术有机融合,提高设计品位。     

一种热管散热器对大功率LED散热效果的研究

针对80 W大功率LED在大空间自然对流条件,设计了散热基板--热管散热系统,并研究了LED输入功率和散热器倾斜角度对LED结温和照度的影响. 研究结果表明,利用该热管散热系统可以使80 W功率LED的结温降至73.5 ℃,LED输入功率和散热器倾斜角度对结温和照度有明显的影响.