Although the development of LED lighting continues, the penetration rate and light efficiency of its products are still far from the theoretical and target values, and technical breakthroughs are still needed. As a combination of multidisciplinary technology and modern information technology, the development of LED lighting technology presents eight development trends.
[Enhanced energy efficiency of LED lighting whole lamp]
The LED whole lamp energy efficiency stage consists of six parts: internal quantum efficiency, chip light extraction efficiency, packaging efficiency, phosphor excitation efficiency, lamp efficiency and power efficiency. Under certain boundary conditions, the theoretical value is 58%. At present, the better energy efficiency of lamps is only 30%, and there is still a lot of room for promotion. The above six items must reach more than 90%, and technical breakthroughs are needed.
[Improvement of the color quality and color rendering of LED light source]
To improve the light color quality of the LED light source, it is necessary to use RGB multi-spectral combination, that is, multi-chip combination or multi-primary phosphor combination to achieve a reasonable LED spectral quantity distribution SPD, and also to control the main light color parameters, such as color tolerance, glare , photoelectric flashing, etc. The color rendering of LED light source is a long-term debate. LED light source can achieve flexible combination of multiple spectra. The color rendering of any parameter is flawed. The ultimate representation may be in the form of spectrum. Some experts have proposed using the color gamut index (GAT) together with CRI to characterize the restoration of light by color.
[LED lighting innovation technology]
LED light source and lamp are currently the top priority of LED lighting industry. Technically, it is necessary to accelerate the innovation of lamp shape and control function. Specifically, the shape and shape of the lamp are creative, the size is flexible, the light quantity is adjusted as needed, the light color is flexible, and the installation position is Feel free to wait.
[Development and application of intelligent lighting]
The technical characteristics of intelligent lighting include open, distributed, remote telemetry, compatibility, interactivity, etc. It is a deep integration of lighting technology and information technology. In terms of technology, the key technologies include the interface integration between the lighting module and the driving power supply. At present, there is no need to have a unified basic standard, and it is necessary to carry out research and development and application according to actual needs.
[Expansion of LED lighting application field]
Promote the application of non-visual lighting systems, such as healthcare, eco-agriculture, LED visible light communication, and infrared LED and UV LED applications, which are rich in content and application technology is rapidly developing. LED display application technology focuses on the development of high-definition small-pitch display and high-definition flexible display technology to achieve high-definition LED TV and high-definition foldable, wearable display devices.
[Study on narrow-spectrum LED devices]
The narrow spectrum of a single LED can realize the spectral flexibility of the combined LED, and can realize a larger color gamut space in the LED display. It is a large application field, and the technology for realizing the narrow spectrum LED device has to break through from the material extension.
[White LED devices will gradually turn to RGB combination]
The use of RGB combined white light theoretically has higher luminous efficiency, and facilitates lamp dimming, color adjustment, color rendering, etc. Technically, it is necessary to focus on improving the efficacy of green LED light, and RGB combination may become the mainstream of general lighting.
[Natural lighting will be the ultimate goal]
With the development of LED multi-spectral lighting, people will pay more attention to energy-saving lighting, health lighting and ecological lighting. It is the best choice to adopt similar sunlight lighting, that is, natural light lighting can be realized by using LED technology, but many technical problems must be solved. .
The development of LED lighting technology is still very large, and the technology still needs to focus on energy saving and power improvement. While actively promoting the innovation of lamps and lanterns in applications, we must continuously expand application fields, such as intelligent lighting, non-visual lighting and high-definition displays; technically achieve the ultimate goal, namely natural light lighting, to provide people with energy-saving, healthy and comfortable lighting. surroundings.
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