实时TV光电子全息散斑干涉仪及其在折射率场中的应用

介绍了一种不需PC微机支持图象卡的实时TV光电子全息散斑干涉仪,成功地应用于折射率流场的显示定量测量,并给出了实验结果。

Color filter-less technology of LED back light for LCD-TV - art. no. 68410G

Back Light Unit (BLU) and Color Filter are the two key components for the perfect color display of Liquid Crystal Display (LCD) device. LCD can not light actively itself, so a form of illumination, Back Light Unit is needed for its display. The color filter which consists of RGB primary colors, is used to generate three basic colors for LCD display. Traditional CCFL back light source has several disadvantages, while LED back light technology makes LCD obtain quite higher display quality than the CCFL back light. LCD device based on LED back light owns promoted efficiency of display. Moreover it can generate color gamut above 100% of the NTSC specification. Especially, we put forward an idea of Color Filter-Less technology that we design a film which is patterned of red and green emitting phosphors, then make it be excited by a blue light LED panel we fabricate, for its special emitting mechanism, this film can emit RGB basic color, therefore replace the color filter of LCD device. This frame typically benefits for lighting uniformity and provide pretty high light utilization ratio. Also simplifies back light structure thus cut down the expenses.

LCD-TV用直下式LED背光源的光学设计

三基色LED背光源是成就高品质液晶显示器的关键技术之一，其色域是传统CCFL背光源的150％以上。其中直下式背光源具有结构简单、光利用率高的特点，是目前大尺寸液晶显示背光源的首选，但是由于没有导光板，直下式背光源的光均匀性变得较差。通过对LED光场分布的模拟和分析，得出了一种新型LED光场分布设计，对由此光场分布的三基色LED组成的66cm（26in）背光源模拟表明，该背光源在未加扩散膜前，灯箱厚度为20～28mm时，亮度均匀度大于83％，△U’V’值在0．01左右；加上扩散膜之后，灯箱厚度为20mm时，均匀度可达到89．58％，△U’V’值达到0．0041。

Tourism Potential of Agricultural Heritage Systems

Traditional agricultural systems are threatened world-wide mainly due to the introduction of modern agricultural techniques and the emigration of farm labourers from remote rural villages. The objective of the programme 'Globally Important Agricultural Heritage Systems' (GIAHS), initiated by the Food and Agriculture Organization (FAO) of the United Nations in 2002, is dynamic conservation of traditional agricultural systems. This article addresses the definition and content of agricultural heritage systems and discusses conservation options in the light of developing rural tourism. An explorative survey was conducted in Longxian village, situated in Zhejiang Province, southern China, focusing on the tourism potential of a typical Rice-Fish Agricultural System. The identification of heritage resources is a first step in the process of transforming an agricultural landscape into a cultural tourism landscape. However, the future of these landscapes is in the hands of a range of stakeholders and depends on their capacity to manage, in a sustainable way, tourism development strategies alongside conservation policies.