First, the temperature is too high will lead to complete destruction of LED display
(1) LED display operating temperature exceeds the chip carrying temperature will make the LED display luminous efficiency quickly reduced, resulting in significant light failure, and cause damage;
(2) LED display is more transparent epoxy resin package, if the junction temperature exceeds the solid phase transition temperature (usually 125 ℃), the packaging material will change to the rubber and thermal expansion coefficient soared, resulting in LED display open and failure The
Second, the temperature will shorten the LED display life
LED display life for its light failure, that is, a long time, the brightness is getting lower and lower until the last extinguished. The LED display typically defines the luminous flux attenuation of 30 for its lifetime.
Often cause LED display light failure reasons are the following:
(1) LED display chip defects in the material at high temperatures will quickly proliferate, multiply until the invasion of light, forming a large number of non-radiating composite center, seriously reducing the luminous efficiency of LED display. In addition, under high temperature conditions, the material within the micro-defects and from the interface and the rapid expansion of the electrical plate will also be introduced into the light emitting area, the formation of a large number of deep level, the same will accelerate the LED display device light failure.
(2) high temperature transparent epoxy resin will be degeneration, yellow, affecting its light transmission performance, the higher the operating temperature of this process will be faster, which is LED display light failure is another major reason.
(3) phosphor light failure is also a major reason for the impact of LED display light failure, because the phosphor at high temperature attenuation is very serious.
Therefore, the high temperature is caused by LED display light failure, shorten the main source of LED display life.
Different brands of LED display light is different, usually LED display manufacturers will give a set of standard light decay curve. High temperature lead to LED display Luminous flux attenuation is irreversible, LED display does not occur irreversible light attenuation before the luminous flux, known as the LED display "initial luminous flux".