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Talking about anti-glare light control material for LED lighting


New development direction of lighting

Innovation is divided into two categories, demand-driven and technology-driven. Where will LEDs be the latest light source technology?

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The light source is the source of the illumination. For a long time, human application of light sources was mainly reflected in natural light, which gave birth to many great architectural cultures and did not discuss them. As far as the artificial light source is concerned, it has experienced the homology of light and fire, the homology of light and temperature (black body), and then to the three main stages of photon theory. In the same phase of light and fire, the main task of lighting is how to make the fire more prosperous. The ancients innovated by looking for more burning pine branches instead of ordinary wood. After discovering the oxidation theory, the innovation is mostly to mix oxygen into combustibles, London. The street lights are a good testimony to the efforts of the pioneers. With the further development of understanding, the separation of light and fire, familiar Edison, experimental high temperature materials to improve the life of the light source, is the historical mission of that generation of lighting people. A generation of theoretical generation technology generation products, under the background of photon theory, the birth of fluorescent lights, metal halide lamps and great LEDs, why is it great? Because this is the first time that humans do not use high temperature to indirectly obtain light, for the first time, there is no intermediate state transition from electron to photon. The benefits are obvious, the reduction of the middle level means high efficiency. Today's LED, 160lm/w efficiency is not a high-tech, and its theoretical limit of 355lm/W (outer quantum efficiency 100%) is both in the ascendant and a long way to go; bypassing The high temperature link also brings about a significant increase in the life of the light source; the fluorescent lamp needs to slowly change to the brightest, and the metal halide lamp needs the startup time, which is caused by the time required for the temperature rise, and the LED is illuminated in milliseconds; the temperature drops, The reduction in the size of the device makes the volume of the LED significantly smaller.

The summary features are as follows: 1. Efficient; 2. Longevity; 3. Low temperature; 4. Fast response; 5. small.

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Efficient, longevity will continue to develop, but not the main battlefield. Because of the economy, the benefits brought by the further improvement of light efficiency are limited, and the life combination demand (decoration period) is basically satisfied, and the difficulty of technological breakthrough is increasing. The demand meets the upgrade of the associated demand. More and more places, no longer simply emphasize the light effect, but where to have light-precision light distribution, what kind of light-color rendering index, color temperature, full color gamut Index, color tolerance, spot pattern, excessive spot, main and auxiliary spots, glare, put forward higher requirements.

The response is fast, the electronic components are powered on at the same time, and the gridded features combined with the hot Internet of Things will also promote product upgrades.

Combined with low temperature, small. The industry has made a lot of innovations, but it is not enough. The form of LED lighting products is not fundamentally different from the traditional era. Its characteristics make the lens (usually a reflector in the traditional era) a major light distribution tool. However, the volume and form of the luminaire have not yet come out of the shadow of traditional lamps. This will be one of the most important breakthroughs in the development of LED lighting. The low temperature characteristics enable more materials to be used. The small size makes the lamps more diversified and more flexible, but also puts forward higher requirements. For example: concealment - see the light can not see the light; homology diversity - the same paragraph multi-light. Both call for miniaturization and modularization, and the luminous surface is not as small as possible, so the evolution of miniaturization should be flat.

Tracing back to the source to draw the four development directions of LED development: First, light quality, two, flat, three, modular,

Fourth, intelligent

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LED lighting challenges

LED light source longevity and high efficiency basically meet the requirements, but the challenges still exist, the system life is affected by: power supply life, process stability of multiple devices and multiple solder joints, temperature and so on. Reducing glare, optimizing the spot, and eliminating chromatic dispersion will greatly reduce the light efficiency, resulting in lower system efficiency. In areas such as stadium lighting, temperature management is limited, and system power and total luminous flux are still low.

In terms of light quality, the challenge is even greater.

The small size of the LED puts higher requirements on the whole lamp process. Mainstream lenses, especially small beam angles, small volume lenses, and subtle assembly errors can cause sharp degradation of light distribution.

The main light distribution method of lighting products is switched from reflector to lens, and dispersion (speciality of refraction) becomes a big obstacle to light quality. At present, the elimination scheme is also relatively simple.

The consistency of the light source is not well solved, and the color temperature and color tolerance are large among batches, especially for high-power small-angle linear lamps.

The judgment of the lighting strobe is based on the standard and uniformity.

On flat roads, there are few high-power products, and mainly large-angle light distribution products such as panel lights. The small angle optical solution is absent.

Modular, more common in streetlight tunnel lights, other lamps are developing slowly.

Intelligent, the road is long. Regardless of intelligence, only simple dimming, indoor 0-10V dimming, tangential dimming, Dali control, and DMX512 control commonly used outdoors, how to integrate into one is also a problem faced by actual engineering projects.