Most designers believe that the quality of all LED products is the same (only most of them, not including you). However, there are many manufacturers and suppliers of LEDs, and Asian manufacturers, especially Chinese manufacturers, supply low-cost LEDs to the world. Surprisingly, only a small percentage of these manufacturers are able to produce high quality LEDs. For applications that are only used as a simple indicator, low quality LEDs are sufficient.
However, high quality LEDs must be used in many areas requiring consistency, reliability, solid state indication or lighting, especially in harsh environments such as highways, military/aerospace and industrial applications.
This requires our LED manufacturers to be good enough to produce high quality products. So, what about the excellent LED manufacturers? What are the factors that distinguish the quality of LEDs? We will elaborate on the following aspects:
Pay attention to the fundamental factors: start with chip packaging
In fact, choosing a high-quality LED can start from the chip until assembly is complete, and there are many factors to consider during this period. A good manufacturing company can produce excellent, consistent wafers from high-quality LED manufacturing materials, which in turn can produce excellent chips.
Among the conditions that determine all of the LED performance criteria, the chemical materials used in the wafer production process are quite important factors. A 2-inch wafer can cut more than 6,000 LED chips , and only the performance of individual chips is different from the overall one. Chips made by a good chip maker have very little difference in color, brightness, and voltage drop.
After the LED chip package is completed, many of their performance metrics may vary greatly, such as viewing angle. In addition, the influence of the encapsulating material is also considerable, for example, silicone is better than epoxy resin.
Classification ability: classification and packaging of LED
Good LED manufacturers can not only manufacture high quality chips, but also have the ability to sort and package LEDs based on their color, brightness, voltage drop and viewing angle. High-quality LED suppliers offer customers products with consistent work characteristics, while lower-quality LED suppliers can only offer LEDs that are similar to “mixedâ€.
For high-end, quality-critical applications, such as boundary lights for airport runways, FAA-level color and brightness specifications must be met. To ensure performance and safety, the consistency of LED packaging is also strictly limited. LEDs with poorer packaging levels are used in demanding applications that can lead to premature failures and other non-conformance issues, which can lead to major accidents.
In order to avoid equipment downtime and to ensure that the LEDs specified in the design have reliable operating characteristics, it is important to avoid the use of "mixed" products in high-end and quality-critical applications.
Product matching ability
In addition to classifying LEDs, LED assembly and power supply have a very important impact on its performance, brightness and color.
Since ambient temperature, operating current, circuit structure, voltage spikes, and environmental factors can all affect LED performance, proper circuit design and assembly are key to protecting LEDs and ensuring performance.
Good LED manufacturers also use a variety of techniques and materials to design circuit structures and assemblies. In most cases, the difference in LED assembler experience can result in the overall performance and reliability of LEDs in the same application. difference.
As the demand for LEDs grows rapidly, manufacturers and assembly plants serving the global market are also rapidly increasing. But unfortunately, the surge in support manufacturers not only use a lot of low-quality LEDs, but their packaging and LED design engineers experience is relatively insufficient.
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