——How to improve the LED display light effect
LED display is used in many aspects. As an emerging industry in the field of LED display, its technical development often has many shortcomings. LED display sets have an advantage, in addition to environmental protection, more important is energy saving. However, due to the pressure of manufacturing costs, it has been facing many obstacles in the promotion. The light effect of LED display can be said to be an important indicator of energy saving effect. At present, China needs to strengthen the light effect, and it is necessary to achieve high light efficiency. To solve related technical problems from all aspects of the industry chain, how to achieve high light efficiency? Today, I will introduce how to improve the light efficiency of LED display and reduce energy consumption.
First, the definition of LED display light efficiency: the luminous flux emitted by the light source divided by the power consumed by the light source. It is an important indicator of energy saving in light sources. A part of the photons generated in the light-emitting layer are absorbed in the LED chip or are constantly reflected in the LED chip, and the LED chip cannot be output. Therefore, the external quantum efficiency is lower than the internal quantum efficiency. A white LED with a luminous efficiency of 100 lm/W has only 32% of its input power as light energy output to the outside. The remaining 68% is converted to heat.
Second, how to improve the LED display light efficiency and reduce the cost:
1. Multi-chip package results in a decrease in yield and difficulty in achieving light consistency.
2, the consistency of light color, how to achieve consistency of light is very difficult, and will increase the cost.
3. The higher the reliability of the high-power LED package, the more expensive the raw materials, making the cost less likely to fall.
4, LED should meet the quality required by consumers.
5, warm white light and high color rendering problems. When the softness is high, the light efficiency will decrease.
6, high-power LED packaging process is very complicated, the artificial gravity is high, it is not easy to use the production to reduce costs.
Summary: LED as a green, energy-saving light source is favored by people, and will also be a mainstream media, leading the future of display technology. In order to break through the bottleneck that restricts the development of the industry, many novel solutions have been proposed and verified by theory. Most of them have entered the experimental stage, some have been successful, and laid a solid foundation for the final industrialization.
Source of information: Internet
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