The biggest problem LED currently encounters is heat dissipation, and the same is true for full-color LED displays. The full-color LED display consumes a lot of power, and a considerable part of the energy is wasted on heating, which will bring many problems. Why can the full-color LED display be widely used? My summary is the following:

   1. Scalability: The larger the full-color LED display is, the higher the investment in production line equipment. The increase in the size of the full-color LED display is very easy, just like building blocks. The resolution is also convenient to implement according to user needs.

2. Full color: light bulbs, neon lights, etc. are all monochrome, and LED realizes the combination of RGB three primary colors.

3. High reliability: LED is solid lighting with high reliability, unlike neon tubes, light bulbs and the like that require vacuum tubes.

4. Long lifespan: The theoretical lifespan of LED chips can reach 100,000 hours, and the actual lifespan is more than 30,000 hours.

5. Environmentally friendly: LED itself is an energy-saving and pollution-free product.

  The heating of the full-color LED display will bring the following problems:

1. Wavelength drift: wavelength drift will cause problems in color correction. When the LED is at low temperature and high temperature, the wavelength drift is relatively large. According to the experimental data, the wavelength changes by 0.2-0.3nm for every degree change in temperature.

2. Decreased output brightness: Every degree Celsius temperature change causes a 1% change in output brightness, of which the red light is most significantly affected. From 180% brightness at -40 degrees to less than 50% brightness at 120 degrees, that is to say, the brightness of the red light is reduced by nearly two-thirds. Relatively speaking, the brightness of blue light and green light are not affected so strongly by temperature, especially the blue light. A problem arises when the temperature rises, the brightness emitted by the LEDs of different colors is not the same.

3. The temperature rise causes the LED life to be shortened: According to the data of a laboratory in the United States, the junction temperature increases from 63C to 74C, and the LED life is reduced from 36,000 hours to 16,000 hours.

4. Excessive heat dissipation components lead to higher system cost.

5. Waste energy and increase user cost.