A1688亮度突破了12000 nit，而其功率仅相当于市面上亮度8000 nit的产品,真正实现LED显示屏的高亮、节能、长寿命；能实现这样的技术突破，源于艾比森在控制技术和LED灯的研发升级。在保持原成本的前提下，加亮不加价，为用户带来真正的实惠。这在LED显示屏行业无疑是一重磅消息。该产品颇受用户青睐，艾比森公司已实现量产，7天内可交货。

近两年来，高亮度户外全彩LED显示屏已经被客户广泛认可并逐渐成为业界潮流。那么，艾比森是如何领先这一行业技术的呢？与市场上百花齐放的节能产品相比，艾比森新一代的A1688又有哪些不一样的优势？

一、       自主研发生产LED屏的核心器件——LED灯，彰显核心优势

艾比森凭借自主研发封装LED灯的优势，在行业内率先采用一个BIN来做一块屏，将同一块显示屏LED的波长控制在2.5nm以内，亮度比值控制在1:1.2以内，利用LED灯在源头把控显示屏的亮度和色彩均匀性。由此，在显示屏的均匀性上，艾比森控制了源头，掌控了核心。

同时，艾比森LED灯的亮度也在不断地刷新，以椭圆绿色LED灯为例，其亮度已经从2007年的1250mcd达到了到现在的3200mcd。众所周知，在配比显示屏的白平衡时，当红、绿、蓝三色亮度比接近3:6:1，显示屏呈现为白色。由此看出，在调节白平衡时，绿色LED灯的亮度占了显示屏整体亮度的60%。而事实上，对于户外显示屏来说，绿色LED灯的亮度不够高，一直以来都是困扰显示屏厂家提升显示屏整体亮度的难题。随着技术的发展，艾比森在10月份最新研制出了高亮LED灯，红绿蓝的亮度已高出市面上30%-50%。

如下所示：

二、        独特研发高亮LED灯，将亮度提升至12000nit

艾比森户外固装畅销显示屏A1688一直因其稳定的品质和高性价比而广受客户的青睐。2010年3月，艾比森将A1688的标准亮度做到8000nit，并不断提升其品质。至今，A1688成为了艾比森最畅销的产品之一。2011年11月，艾比森再次对A1688进行升级，将其标准亮度提升到了12000nit的超高亮度！值得一提的是，艾比森提高亮度并不是靠提升电流来达到，而是依靠艾比森自主研制的高亮LED灯。

A1688做到12000nit的亮度，红、绿、蓝单灯最大的工作电流（显示屏全白状态）仅为R：13.6mA；G：12.8mA；B：11.4mA，远低于LED安全的最高工作电流20mA，低工作电流不但降低了显示屏的功率，而且保证了显示屏较长的使用寿命。当然，如果在某些环境下不需要太高的亮度，客户可以根据实际的使用情况，采用自动或手动方式进行调节。

三、                 价值在所见之外，提升显示效果，延长显示屏使用寿命

提高LED灯和显示屏的亮度，可以给客户带来哪些价值呢？

首先，高亮度的显示屏在阳光直射的情况下，仍然可以将所要显示的画面完美地展示出来。无论是在中东，还是在美国拉斯维加斯，世界上任何一个阳光强烈照射的地方，艾比森A1688显示屏亮度仍然超出消费者的期望。

其次，让观看距离不会因为亮度问题而受限，受众人群更广。显示屏最远的观看距离除了跟显示屏的点间距、面积、长宽比例等因素有关，另一个非常重要的因素就是显示屏的亮度。光在空气中传播，受大气气体分子及气溶胶的吸收和散射会引起能量的衰减。朗伯定律表明，光强随传播距离的增加呈指数规律衰减。在有烟雾和空气质量不好的环境下，衰减程度更高。因此要达到一定的观看距离，必须要有足够的亮度来保证。

再次，可以大大延长显示屏的寿命。艾比森A1688显示屏的标准亮度为12000nit，因此使用2年后，随着LED灯的衰减，亮度仍可高于8000nit，相当于目前市面上一块新的普通主流显示屏的亮度，显示效果依然良好。这就相当于为客户赚取了2年的使用时间。同时，如果将亮度设置在8000nit使用，将会大大减少LED灯的衰减以及降低相关设备的负荷。也可延长显示屏的寿命。

最后，节能，真正实现为客户省钱。在显示屏同等亮度的情况下，LED灯的亮度越高，显示屏的整体功率越低。

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.

by Fabio Sanguine

本期介绍了近些年被特别关注的大功率 LED 的性能，其中包括其效率、耐热性、驱动电流以及其它新性能:

This article introduces the performance of PowerLEDs, that including their efficiency, thermal resistance, driver current as well as their other new features :

Lm/W

    流明瓦（Lm/W）是光效的单位，是指光源的光通量与其消耗的电功率之比，其得到了重要的改善。现已有超过150lm/W 的 LED。这个效率的获得是芯片制造技术和其尺寸改善的结果。这使得在极低的 Vf 值（正向电压）时可以获得高光通量。众所周知，LED 电压下降可以降低能耗。和前几年不同，如今我们已经有 Vf 值（正向电压）低于3V（图1）， 电流为350mA 的 LED。

Lm/W

There has been a significant improvement in efficiency, in terms of flux emitted in relation to Wattage consumption. LEDs with efficiencies of over 150 lm/W are now available. Such levels of efficiency are possible due to improved technology in relation to chip production and size. This has enabled high flux levels and minimal levels of Vf (Forward Voltage). As we are already aware, a reduction in LED voltage leads to reduced energy consumption. Unlike a few years ago, we now have LEDs with forward voltages, expressed as 350mA, of less than 3V. (Picture 1)

耐热性

基于对热管理的重要意义，各 LED 生产商也开始投资大功率 LED。该热管理取决于产品的预期寿命（L70）、LED 流明瓦的比值、成本、色调等。现在可以购买 Rth 低于5°C/W 的产品，既有单芯片也有多芯片，而在不久前该参数还是8-10°C /W（图2）。

Thermal resistance

The various LED manufacturers have also invested in this area due to its significant effect on the system’s thermal management. Such management depends on the product’s estimated lifetime (L70), the lm/W ratio of the final LED matrix, cost, colour tone, etc. You can now buy, in both single and multi-chip versions, devices with a Rth well below 5°C/W, which until not long ago were only available in 8-10° C/W. (Picture 2)

驱动电流（If）

关于驱动电流，目前已经可以购买到3A 的 LED。由于采用先进创新科技，可以使 LED 达到这样高的电流，这样可以显著降低光通量输出成本（lm/Eu 或 lm/$）， 而同时并没有忽略该系统的热管理（图3）。

Current (If)

With regard to the maximum driver current, it is now possible to purchase LEDs that can be operated up to 3A. Thanks to innovative technologies, which allow the LED to be driven up to such current, it has been possible to significantly reduce the ratio of flux output to cost (lm/Eur or lm/$), while not neglecting the system’s thermal management. (Picture 3)

多芯片

近几年，市场出现一些基于采用多芯片封装的新产品。这些产品来自不同的生产商，具有不同性能。实际上，有一些 LED 采用便于使用的容器，这样的容器可以插入封装内部，用简单的螺丝固定。这些方案的特点是：在能耗相同的情况下，获得更高光通量。现在，这些产品效率值（lm/W）低于单芯片产品。可以看到，在这些产品中，无论是光通量还是效率都得到了很大改善，使用这些产品可以配备在光通量、显色性、颜色、散色性等方面都很好的零件。实际中有多芯片技术的 LED，3step MacAdams 椭圆装置能运用多芯片 LED 技术，其显色指数（CRI）超过90%，（图4）。

Multichip

In recent years, new products using of multiple chips within the same product have been put on the market. Several manufacturers offering a variety of types and performances sell such products. We can now easy to use LEDs, which simply screw into the unit. These products tend to have excellent flux levels alongside equally efficient consumption levels. Currently, the levels of efficiency (lm/W) of these products are less than the single-chip products. Significant improvements, both in terms of flow and efficiency mean that by using these products it is possible to produce high-performance devices in terms of flow, size, colour rendering and size of colour dispersal. The 3-step MacAdams ellipse offers multichip LED technology with a CRI of over 90% and linear colour spaces (Picture 4).

 by Fabio Sanguine

In order for LED lighting to be considered an alternative to traditional lighting, it needs to offer sufficient lighting levels and reduced payback times. Once the initial outlay has been paid off, these reduced payback times offer even greater savings.

    确定 LED 照明装置投资回报和照度水平涉及到很多因素，其中最重要的因素当属质保、能耗和光通量。

Many factors are involved in determining payback time and lighting levels. Undoubtedly, however, the most relevant factors are those relating to product warranty, light absorption and flux emission.

质保

    对于最终用户来说，质保期长是明显的节约，因为减少了设施维护设施的成本。照明装置的制造商倾向于采用高级大功率 LED 产品，因为这样的产品有5年或以上的质保，LED 制造商在签发质保书的同时签发使用中出现的产品维修证书。凭借这些正式文件的支持，照明装置的制造商在使用大功率 LED 时必须按正确温度设定，这样才能得获签发一定等级的质保书。可以设想，使用大功率 LED 时，照明装置制造商一定要在热力学领域上有相当的了解和能力，以求在一定空间范围按当前市场标准配置适当数量的 LED 。因此，使用优质电源在确定质保期的时间长短上起着一定的作用（参见侧图）。

Warranty

An extensive warranty period means significant savings for the end user as maintenance costs are reduced. Device manufacturers tend to use high-end PowerLEDs, as this enables considerable warrantees (lasting 5 or more years) to be issued. This is possible because the manufacturers of LEDs issue them with official documentation on their maintenance in relation to usage. Thanks to this supporting documentation, manufacturers of devices using PowerLEDs can ensure they function at the correct temperatures, which enables a certain level of warrantee to be issued. The use of PowerLEDs thus requires – on the part of the device manufacturer – considerabl