The key performance indicators of LED

　　LED performance indicator is a core part of the entire LED. Only by understanding its performance indicators in order to not only better understand the LED for future development and marketing but also something must be taken into in LED industry. Now let me give you a detailed analysis:

　　(1) LED colors: LED color is a very important indicator and must be related to for each LED lighting products. The current LED colors are mainly red, green, blue, cyan, yellow, white, warm white, amber and other colors. In our design and order receiving, this parameter must not be forgotten (especially beginners) because of different colors, the relevant parameters change a lot.

　　(2) LED current: LED forward limit (IF) in the current multi-20MA, and the LED light failure current can not be greater than IF / 3, about 15MA and 18MA .. LED luminous intensity only within a certain range and IF proportional, when the IF> 20MA, the brightness enhancement has been unable to between ordinary small power LED (0.04-0.08W) points out with the eye, so LED current general election in about 17-19MA reasonable. previously yes The LED is concerned, with the exception of some Piranha LED (rated at around 40MA some of) Except with the continuous development of technology, the power LED is also emerging as 0.5W LED (IF = 150MA), 1W LED (IF = 350MA), 3W LED (IF = 750MA) there are other more specifications, I do not introduced one by one, you can check it yourself LED manual.

　　(3) LED voltage: we usually refer to the LED forward voltage, that is positive then the power LED anode, cathode connected to the negative power supply has a relationship with the colors, red, yellow, green voltage is 1.8. between 2.4v. White, blue, green voltage is between 3.0-3.6v, the same number of LED's voltage may be some differences, to be in when the outside temperature rises, VF will drop according to whichever manufacturer provides.

　　(4) LED reverse voltage VRm: increase the maximum allowable reverse voltage. Exceeds this value, the LED may be damaged breakdown

　　(5) LED color temperature: K to represent the absolute temperature, is about a standard blackbody heating, the temperature rises to a certain degree by the dark red color start - light red - orange - white - blue, gradually changing to a light source and a blackbody the same color, then we will blackbody temperature is called the absolute color temperature of the light source.

　　Due to the fact that the correlated color temperature of the light source is close to the color of blackbody radiation and the evaluation value of the performance of the light source color, which is not an accurate color contrast. Therefore, the color temperature of the same value with the second light source may have some differences in appearances. We could not judge the CRI only by the color temperature of the light source or how the reappear of the object under the light source.