LED display screens are used in many aspects. As an emerging industry in the field of LED display, its technical development often has many deficiencies. LED display screen has an advantage, in addition to environmental protection is more important is energy saving. However, due to the pressure of manufacturing costs, the promotion has always faced many obstacles. The light effect of LED display can be said to be an important indicator of energy saving effect. At present, China's light effect needs to be strengthened. To solve related technical problems from all aspects of the industrial chain, how to achieve high light efficiency? Today, I will introduce how to improve the light efficiency of LED display and reduce energy consumption.
1. Definition of LED display light effect: the luminous flux emitted by the light source divided by the power consumed by the light source. It is an important indicator to measure the energy saving of light sources. Part of the photons generated in the light-emitting layer are either absorbed in the LED chip, or continuously reflected in the LED chip, and the LED chip cannot be emitted. Therefore, the external quantum efficiency is lower than the internal quantum efficiency. The white LED with a luminous efficiency of 100lm / W has only 32% of its input power output as light energy to the outside. The remaining 68% is converted into heat.
Second, how to improve the LED display light efficiency and reduce costs:
1. The multi-chip packaging causes the yield to drop and it is difficult to achieve the consistency of light.
2. The consistency of light color, how to make the light consistent is very difficult, and it will also increase the cost.
3. The higher the reliability of the high-power LED package, the more expensive the raw materials, making it difficult to reduce costs.
4. LED should meet the quality required by consumers.
5. Warm white light and high color rendering. The higher the softness, the lower the light efficiency.
6. The high-power LED packaging process is very complicated, and the proportion of manual labor is relatively high. It is not easy to mass-produce to reduce costs.
Summary: LED is favored by people as a green and energy-saving light source, and will surely lead the future of display technology as a mainstream media. In order to break through this bottleneck restricting the development of the industry, many novel solutions have been proposed and theoretically verified. Most of them have entered the experimental stage, and some have been successful, and have laid a solid foundation for the final industrialization.
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