Decryption LED Tube Quality Factors and the best solution

    In the New York subway station environment, security requirements are very demanding , LED Tube lighting  must meet the requirements of high-quality fundamental factor .

    The factors that distinguish the level of quality LED Which ? How to tell the difference between two kinds of LED ? In fact, the selection of high quality LED chip can begin until assembly is complete , during which there are many factors to consider. Tier-OneLED manufacturing company to produce good , consistent indicators wafer is manufactured from high- quality LED material humble beginnings , in turn, can produce excellent chip. LED performance in determining the conditions of all , the wafer used in the production process is a very important chemical material factor.

A 2 in. wafers can be cut out of more than 6000 LED chips , there is only the individual and the overall chip performance indicators are different.And an excellent chip makers manufacture chips in color, brightness, and other aspects of the voltage drop difference is very small. When the LED chip package is complete, the performance of many of their great differences may exist , such as the viewing angle . In addition, the impact of packaging materials is quite large , for example, silicone epoxy than good performance.

Classification ability

Excellent LED Tube lighting  manufacturers can not only produce high -quality chips , but also according to the LED with color, brightness, voltage drop and the different perspectives of its classification packaging capabilities. High quality LED vendors to provide customers with consistent product performance characteristics , while lower-quality LED suppliers can only offer similar to the " mixed " of the LED.

For the high-end , quality demanding applications, such as runway edge lights , must meet FAA specifications color and brightness level , to ensure performance and safety , LED packaging consistency and it was strictly limited . Packing LED is used in less demanding applications will lead to premature failure of a series of non- conformance issues , is likely to lead to a major accident. To avoid equipment downtime and ensure that the design requirements of the LED with a reliable operating characteristics , and the strict quality requirements of high-end applications avoid the use of " mixed " product is very important.

Products supporting capacity

In addition to discrete LED, LED assembly and power supply for its performance , brightness and color indicators have a very significant impact . The ambient temperature , the operating current , the circuit structure , so the voltage spikes and environmental factors can influence the performance of LED Tube lighting , proper circuit design and assembly is to protect the LED and ensure the performance of the key. LED manufacturers can use a variety of techniques and different materials to design the circuit structure and assembly , in most cases , LED assembly difference in the experience of the level of the same application will cause the LED in the overall performance and reliability differences .

With the rapid growth in demand for LED , serve the global market manufacturers and assembly plants also increased rapidly. Unfortunately , the surge in support for manufacturers not only a large number of low -quality LED, their packaging and LED design engineers relative lack of experience . Therefore , in addition to the existing experience and accurate screening through LED suppliers outside , OEM manufacturers must also examine their circuit design and assembly techniques to ensure that it meets design specifications , and design provides adequate cooling capacity , because causes the LED failure and performance the main factor is inconsistent overheating.

To ensure that it meets the design requirements , OEM must detect the LED Tube lighting  assembly and circuit structure

Third-party testing

In order to eliminate the injustices that exist in the test , and many companies have commissioned a third party to test the LED assembly and circuit structure . An LED device may be tested or used in harsh environments for several weeks. During the test , while the pressure , temperature cycling, voltage is fixed / change current fixed / changes and other tests , other harsh environmental conditions of the test to determine whether the LED to meet the application requirements. Occur before and after the test a large number of parameter changes should be recorded while monitoring the measured LED brightness , color, and the voltage drop changes.

Accelerated life cycle testing is a special application areas is a key test to avoid failure . Testing helps ensure that filter out those who expect to work at least 100,000 hours , but only 1,000 hours on the early failure of the LED Tube lighting . This situation is possible because of the low quality of the LED ( it may be designed to be assembled unreasonably high quality LED) after 1000 hours at work will reduce the brightness . In fact , if a low- quality LED drive current higher in the early work will be brighter than the high quality LED , however , the high LED current will heat quickly, the end result is darker or burning.

 

In addition, the assembly technology in a way affect the performance of the LED chip itself is larger than the examples are some exceptions .Design engineers should ask suppliers to the LED LED reliability specification, and should also be assembled and tested to ensure that the LED brightness relatively high indeed better . Some excellent LED suppliers can guarantee their reliability LED assembly technology can be sustained for three years or longer , and can provide further includes a high quality LED Tube lighting  and for specific applications and for the proper design of LED products , including the final .

The importance of testing

Two applications within the field of transport helps to explain how to prevent the LED fully tested to provide high visibility in applications where failure . In the early 1990s , LED for cars and trucks brake lights . Some LED design soon emerged inconsistencies performance indicators , and quickly burned down , the reason may be due to the LED quality problems , perhaps the design of the product itself is entirely the problem . Until recently, in respect traffic lights , when the LED light source to become more appropriate , this phenomenon was only seriously. Design covered with a diameter of 8 inches or LED 12-inch PCB companies must choose the LED and improve the design and other aspects to consider environmental and application needs .

Any of the above circumstances , if the pressure test or accelerated life cycle tests have been done, it can be considered high quality LED or LED assembly is qualified, it can be applied to a longer life and higher reliability occasions it.

Rational use

Not every application requires high quality LED Tube lighting assembly technology . If the LED assembly does not meet the requirements of harsh environments , the application will not necessarily a larger security risk , or , if the final product is not very high maintenance costs , the use of some poor assembly techniques may be more appropriate.

The most fundamental point is the LED must be able to afford . Therefore, within the limits of the cost requirements , we must consider the level of vendor product packaging , assembly and testing of design experience and other factors . Meet the application and market demand is designed to serve the end user the most effective means . If the application requires high-end solution , then the chip vendor selection , design experience, and testing are all factors to be considered . If you do not consider the high-end product sales price, you should carefully consider the difference between good and bad LED and other relevant factors. Have the ability to classify the packaging level LED suppliers , and the ability to carry out reliability , accelerated life cycle testing vendors be able to conduct long-term cooperation , which helps manufacturers to adopt a more reliable LED Tube lighting develop high-end products.