文：法比奥·萨诺圭涅
by Fabio Sanguine
本期着眼于从光通量、显色、色谱和能效 (lm/W) 继续介绍大功率 Power LED 的性能，以及其一些新功能
In this issue, we introduce currently available in terms of flux, chromatic rendering, colour spectrum, efficiency (lm/W) of Power LED, as well as some the new features on offer
光通量
大约两年前，电流为 350mA 的冷白光 LED 灯就达到了最小 100lm 光通量，现在相同色温的 LED 灯的光通量大约可以达到 140lm ，还宣称在一年后推出 150lm 的大功率 LED 。近几年，中性色、暖色和白色色温的光通量值发生了巨大变化：这些色温的光通量值最适合大多数的室内应用。对于中性色温 (大约 4000K ) ，现在有高达 130lm 的产品，其显色指数 (CRI) 为75%。关于这种色温，有几家知名制造商推出了所谓的户外产品类型：这些产品类型具有与冷光相同的光通量值，但 CRI 相对较低。通过检测，这些产品应用于很多项目的相关设备中，而在这之前只可以使用冷光，其光通量更强。对于彩色 LED ，绿色 LED 的光通量值高达 100lm ；红色 LED 的光通量值大约可以达到 70lm ；蓝色 LED 的光通量值可达到 35lm 。照明设备逐渐需要使用这些产品，因此，许多知名生产商花巨资来提高白色大功率 LED 的光通量。（图1）
Flux
Around two years ago, a minimum of 100lm with a current of 350mA had been achieved for cold, white LED lights. Today, levels of up to approximately 140lm of the same colour temperature are now available. It has also been announced that Power LEDs of 150lm should be available later on in the year. In recent years, flux levels for neutral and warm, white colour temperatures have undergone massive development: these are more suited to the majority of indoor appliances. With regards to neutral colour temperature (about 4000K), products of up to 130 lm with a colour rendering index (CRI) of 75% are now available. In relation to this colour temperature, several high-profile manufacturers have introduced so-called outdoor versions: these versions have the same flux levels as cold light but a lower CRI. These products are tested, and in many cases used, to create appliances that until only recently were only possible using cold light, which was more powerful in terms of flux. As for colour LEDs, these are available in green with flux levels of up to 100lm, red up to almost 70lm and blue up to 35lm. Many of the high-profile producers have invested heavily in increasing the flux of white Power LED as these products are increasingly in demand for lighting devices. （Picture 1）
显色
这方面也看到了显著改进。实际上，几年前，只有很少的制造商的产品目录中有高 CRI 的产品，而现在许多制造商都提供不同类型的产品。现在或很快会有 CRI 为80%、85%和90%以上，以及光通量值远远超过那些2年前产品的暖白色 LED 。这些进展归功于不断增长的室内应用需求。（图2）（图3）
Chromatic rendering
This area has also seen significant improvements. In fact, a few years ago products with a high CRI were only available in the catalogues of a few manufacturers, whereas nowadays many manufacturers offer different types of these products. Warm white LEDs with CRIs of 80%, 85% and over 90% and flux levels well above those of two years ago are now available or will shortly be so. Such progress is due to the growing demand for indoor appliances.(picture 2) (picture 3)
CCT (相关色技术)
其中一个方面是，直到最近都未帮助开发 LED 技术的 colour bin limits (色度等级限制)，那时设置的色度等级限制与现在不同。如果不适当考虑这个问题，会导致基色的相容性水平与其采用的技术不符，这些仍然是重要要求。近几年，制造商取得了明显进步，因为他们确保色度等级限制符合 C78.377A (ANSI)标准。这种工艺利用色度等级限制能够让生产的基色具有彩色 LED 的特点，这样，可以保持非常低的开氏 (Kelvin) 色度差。（图4）
CCT (correlated colour technology)
One of the aspects that, until recently, did not help the development of LED technology were colour bin limits, which, at the time, were not set as they are now. This matter, when not properly considered, could lead to matrices with compatibility levels inappropriate for the technology in which they were – and still are – important requirements. In recent years, manufacturers have made considerable progress, since most of them have ensured colour bin limits in line with the C78.377A (ANSI) Standard. This process could enable the production of matrices characterised by colour LEDs with a colour bin limit in which the variance in degrees Kelvin could be kept very low. (Picture 4)
这些与性能相关的新发现意味着 LED 越来越被广泛应用，直到最近这些新发现还是有些不可能。
These new performance-related findings mean that the LED is increasingly being used in numerous appliance; something that, until recently, had not been possible.
