Light-emitting diodes (leds) related to lighting rod equipment use and development

Sorching summer heat will turn out to be in poor LED display what harm? LED is one of the biggest problems is the cooling, LED display is the same. LED display of power consumption is very big, quite a number of waste energy on heating. Fever brings many problems.

in the hot summer, bad heat dissipation can bring to light emitting diode display what harm? At present, the light-emitting diodes (leds) one of the biggest problems is cooling, so is a light emitting diode display. Light emitting diode display of power consumption is very large, quite a lot of waste energy on heating. A fever can bring many problems. Why the light emitting diode display screen can be widely used, I summarized as follows: 1. Extensibility: LCD screen, the greater the input, the higher production line equipment. Like building blocks, to increase the size of the led display screen is easy. Resolution also facilitate according to user requirements. 2. Color: light bulbs and neon lights are monochrome. Light-emitting diodes (leds) to realize the combination of the three primary colors. 3. High reliability: light-emitting diodes (leds) is the high reliability of solid state lighting, unlike the neon tube and bulb, need a real atc. 4. Long life: the theory of light emitting diode chip life can reach 100000 hours, the actual service life of more than 30000 hours. 5. Environmental protection: light-emitting diodes (leds) itself is a kind of energy saving and pollution-free products. At present, the light-emitting diodes (leds) one of the biggest problems is cooling, so is a light emitting diode display. Light emitting diode display of power consumption is very large, quite a lot of waste energy on heating. A fever can cause the following problems: 1. Wavelength drift: wavelength drift can cause problems of color correction. When the light-emitting diodes (leds) at low temperature and high temperature, relatively large wavelength drift. According to the experimental data, the wavelength changes with the change in temperature 0. 2 - 0. 3 nm. 2. Output luminance decline: 1% output luminance change is caused by each Celsius temperature variations, including red most affected. From - 180% brightness at 40 degrees to 120 degrees when the brightness is less than 50%, that is, the brightness of the red light was reduced by nearly two-thirds. Relatively speaking, the influence of temperature on the blue and green brightness is not very big, especially the blue. When the temperature rises, can be a problem. Different colors of leds emit different brightness. 3. Temperature reduces the light emitting diode life: according to the laboratory data, junction temperature from 63 degrees to rise to 74 degrees Celsius, light-emitting diodes (leds) decreased from 36000 hours to 16000 hours service life. 4. Too much heat dissipation component can lead to system costs. 5, the waste energy, increases the user cost. The heat from where? From the power supply to the led lamp, to the light emitting diode drive, and then to the adjustable resistor, heating part includes led lights, light emitting diode drive and light-emitting diodes (leds) cables. 5 v power supply, for example: 5 v power supply voltage; Light emitting diode, light emitting diode voltage = 3 G/B. 2 v, light-emitting diodes (leds) R = 2 voltage v1. Leds luminous efficiency is about 20%, and the light emitting diode heating accounts for 50% of total heating. 2. Controller and cables, etc. Accounts for about 5% of the total calorific value of 3. The driving voltage drop: 1. 8V( G/B) Or 3 v ( R) Voltage drop, the driving part of the heating accounts for over 45% of the total heat. Light emitting diode lamp heating need to improve the efficiency of led light, controller and connecting line heating is less, between 0 + increase is not big. Drive part empty heating improvement is very large, this is also our hope to improve. As the inventory rises and falls, the LED chip leading enterprises to speed up the pace of expansion of production. How can we save electricity in led display?