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A measuring system which mainly consists of a high precision motorized translation stage of one dimension, POINT GREY Flea2-14S3 CCD camera and LED light source was designed and constructed. Based on a detailed analysis for experiment results, the periodic changing law of system error of LED facula centroid location in this measuring system was found. The results indicate that based on Flea2-l4S3 CCD camera, the random error of facula centroid location is about 0.018 pixels, the system error is about 0.06 pixels, and the total error is about 0.063 pixels (1/15 pixels). According to the total error above, this CCD imager can be widely used in many measuring systems which count on facula centroid subpixel detection.

利用高精度一维电动平移台、POINT GREY Flea2-14S3 CCD相机和LED光源构建了测试系统，对测试结果进行研究和讨论，发现了测试系统LED光斑质心定位系统误差的周期性变化规律，计算得到了基于Flea2-14S3 CCD相机的光斑质心定位随机误差为0.018pixels，系统误差为0.06pixels，总体误差为0.063pixels（约1/15pixels），能够应用于以光斑质心检测为手段的测量系统中。

The result showed that the luminous flux for LW white LED radiation power output is 298.7 lm and the total photons are 2.7×1018. If under ideal conditions, one electron-hole pair injected yields one blue photon and the quantum efficiency of the phosphor equals one, the numbers of electron-hole pair must equal to the numbers of white photons.

在理想情况下，注入一个电子-孔穴对产生一个蓝光光子，设荧光粉的量子效率为1，因此，注入的电子-孔穴对数亦等于白光光子数，进而计算出白光LED每辐射1 W的光功率所需的电功率为1.51 W，上述白光LED发光光谱对应的白光LED的电-光转换的理论极限流明效率为197.8 lm/W。

Beijing has only door and monarch in zuoanlu pilot LED lamp, street alley management centre half a year by the same test, LED lighting effect in the circumstances, power consumption is the incandescent light bulb one-eighth of fluorescent tubes, one half of energy, but by around 40%.

北京市先后在左安门和辟才胡同试点LED路灯，路灯管理中心通过一年半的跟踪测试，LED在同样照明效果的情况下，耗电量是白炽灯泡的八分之一，荧光灯管的二分之一，可节能40%左右。

My company's products range mainly white LED, piranha white and a variety of shapes LED.

我公司产品品种齐全，主要有白光LED，食人鱼白光以及各种外形的LED。

Open Linear Encoder includes main grating scale and optical encoder head. This optical encoder head includes LED light source, optical detector module, and secondary phase-grating. LED light will pass through the plano-convex lens and produces parallel light. As the parallel light pass through secondary grating, the quadratic image display on the main grating scale. And the Moire interference will be reflected from the main grating scale and detected by optical detector module, as there is a relative shift between the main and secondary grating. From detecting the periodic sinusoidal signal with phase difference 90°, the period represents the grating pitch, using the counter to detect the number of periodic signals to get the displacement, and we can adapt the technology of electron subdivide further to increase the resolution of measurement .

反射式光学尺包括主光栅尺及光学读头，光学读头包含LED光源、光侦测器模组及相位式副光栅，LED光源经平凸透镜，产生平行光穿透副光栅后，副光栅之二次成像投射在反射主光栅尺上，当主、副光栅因相对运对产生之Moire干涉经主光栅尺反射至光电检测器，检出相位差90°之周期性弦波讯号，其周期代表栅距，因此可用计数器检出周期性讯号数目得到位移量，可进一步采用电子细分割技术提高解析度。

LED meshwork lamp is composed of many LED lamp-wires as definite regulars, regulars, whose shapes have square, rotundity, triangle and octagon; the colors can be make up of homochromatic or multicolor, the meshwork lamp can cover the surface of anything, whose twinkling lamps and beautiful colors can catch the views of people from the far distance, really the preferred decorative product for the hotels, drinkery and exterior decoration of big recreation places.

LED 网灯是由多组 LED 灯串按照一定规格排列起来的网状灯饰产品，其形状有方型、圆型、三角形。八角型、颜色可由单色或多种颜色排列组成，其用途独特之处在于：可以覆盖任意物体表面，其生动的闪烁效果及强烈的显色性，在很远处就可以抓住人们的视线，是宾馆、酒楼、及大型娱乐场所外景装饰的首选产品。

This paper is from the LED miner's lamp of light source development the drive of present situation and LED miner's lamp the safety of circuit and miner's lamp is used.

本文从LED光源矿灯的发展现状、LED矿灯的驱动电路、矿灯的安全使用。

LED safety lamp power telephone: telephone line desk lamp to use is that we ordinary telephone lines, voltage-driven LED light-emitting highlight, we also know that phone lines generally only 50V, the total power of only 0.3 watts, which means the lamp less electricity than the telephone, at the same time the use of 10,000 telephone lines per hour lamp consumes only 3 degrees.

LED电话台灯的安全省电：电话线台灯使用的是我们普通的电话线，电压驱动高亮LED发光，我们也知道电话线一般只有50V，总功率只有0.3瓦，也就是说该台灯的用电量比电话机还少，同时使用10000只电话线台灯每小时仅耗电3度。

It is expounded in detail that LED display technique and its application, function, characteristic and etc in information display of scheduled flight in airport, and introduce the information flow in airport It is useful to understand the function of the LED display scree

详细阐述了 LED显示技术及其在机场航班信息显示中的应用、功能、特点等，并介绍了机场信息流程，以利于大家对 LED显示屏作用的认

Ideal for LED manufacturer industry,keep the LED board smoothy and like foggy during the epoxy processing, no adhesiveremainded.

专为LED 显示器所使用的胶带，透明白色，在对装环氧树脂的作业过程中，能有效让LED 显示面板达到平坦和显现雾状，而且在移除胶带后不留残胶。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。