LED light source zoom technology in the development of lighting

Zhongzhao.com In the development of LED commercial lighting to today, the homogenization of products and disorderly competition have made LED lighting enter the Red Sea from the blue sea. In today's fierce competition, LED lighting has begun to differentiate, and in the field of application, the museum, hotel, catering, office and other subdivisions have been divided. In the development of technology, it is also moving towards dimming and color, and the direction of intelligent control is developing. At the same time, there are more manufacturers to develop in the direction of LED zoom. Zooming here has been around for a decade in the development of LED applications. So what are the current developments in zoom technology in LED lighting?

In fact, zoom technology is common in everyday life, such as zoom camera, stage lighting and so on. However, the zoom principle of the camera and the zoom principle of the LED are just the opposite of the mirror image. There are big differences, and it is more common in stage lighting applications. Here, apart from the traditional metal halide lamp, car lights and other applications zoom, talking about the direction of LED zoom application, the earliest should be the LED flashlight industry. Around 2000, when many people didn't know what LED is, LED has already begun to be applied first in the flashlight industry.

Since LEDs are surface-emitting and also have intensive illumination advantages, zooming in LED applications has become possible. The company that first applied zoom to LED flashlights has also achieved great success. In the LED zoom flashlight industry, we have to say that a world-renowned company established in 1997, Yangjiang Yangdong Nagu Technology Co., Ltd., its zoom series brand "LEDLESER" has become the world's second largest high-end mobile in 2005. Lighting brand, the annual export of more than 100 million US dollars. In today's fierce competition for LED mobile lighting, Yangdong Nagu Technology still maintains sales of over US$100 million.

After the LED zoom technology has achieved great success in the application of the flashlight industry, China also has general lighting companies involved in this field. The earliest should be the “three-zoom” brand, and its parent company is Shenzhen Lighting Life Lighting Co., Ltd. Here, I have to say that Mr. Yi Shi value, the founder of “Three Zoom” Museum Lighting, is the first leader in LED applications in China, and the brand of “LEDLESER” brand of Yangdong Nagu Technology, the world's second largest mobile lighting brand. By.

The first three zooms began in 2008. The successful experience of LED zoom flashlights was first transplanted into general lighting fields such as commercial lighting and museum lighting. It is also the first professional brand in China and the world to apply zoom to museum lighting. The earliest zoom patent of the three zooms began to obtain the first patent in 2009. This may be the earliest zoom patent in the LED general lighting industry in China, and the three zooms have also obtained a series of patents such as stretching and rotation.

Since the three-color zoom brought the zoom technology into the field of general-purpose LED lighting in 2008, zoom has achieved certain development in the lighting industry for nearly a decade. At the same time, there are certain development bottlenecks and technical difficulties, which require more lighting. The manufacturer went to conquer. At present, the most successful field of zoom technology application has to be said in the field of stage lighting, as well as in the field of museums and art galleries.

The LED zoom technology has been successfully used in stage lighting and museum lighting, but it is still difficult to popularize in the field of commercial lighting. What is the obstacle to the development of LED zoom technology in the field of general lighting? The well-known media "Yun Zhiguang" was in the public number. On May 28, 2016, the article "Weekly Lights - Adjustable Focus LED Track Spotlights" was released.

In the article, Enke's 35W zoom rail light was selected for reporting and analysis. Once the article was issued, it immediately caused a hot discussion in the industry. Look at the background of the "Cloud Zhiguang" public number, you will find that the background immediately enters the state of war, the industry big coffee has spoke, a lively scene.

The fierce snoring in the background can be seen that the industry is very concerned about the application of zoom in LED. So many comments can be seen that there are certain technical difficulties in the application of LED zoom technology in commercial lighting. Among them, the well-known domestic hotel lighting brand Zhongguang Diantong Huang Zhihua is the keynote of the general manager. At present, the obstacles hindering the application of LED zoom technology in commercial lighting are that the light effect of zoom is not high enough to meet the illumination requirements of commercial lighting.

According to the report of the above-mentioned cloud Zhiguang media, the 35W Encore zoom track light, 12 degree light, 3 meters of illumination has only poor 740LX. This is similar to the illuminance of a 10 watt power fixed-focus 12-degree light guide. Such illuminance is also possible in the field of museum lighting, if it is not enough in the general field of commercial lighting.

LED zoom technology has developed to the present day, mainly failed to meet the needs of commercial lighting - illumination requirements! LED zoom technology is actually very simple in principle, is to change the size of the spot by changing the distance of the light source from the lens, while changing the illumination size. The technical difficulty of LED zoom is mainly the matching of lens and chip illumination, and the core is in the matching optical design and development.

At present, the zoom lens can be used in the form of Fresnel lens, convex lens, frog eye collimating zoom lens and the like. The Fresnel lens is a flat lens. Although it has a zooming effect, the light effect is relatively low, and it is generally not used. The convex lens is the simplest and original lens for LED zoom, and the most widely used is in the LED flashlight industry.

A large number of lighting companies at home and abroad use the most traditional convex lens as the main optical means of zoom, such as WAC, IGUZZINI and other well-known brands at home and abroad. The advantage of using a convex lens is that the optical cost is relatively low, and it can be easily carried out without a large amount of technical input, and can be focused to a very narrow angle of 6-9 degrees.

The shortcomings of the convex lens are also very obvious. The convex lens lacks the light-receiving system first, and a long zoom distance is required in the zooming process to produce a small-angle focusing effect. At the same time, the light quality of the convex lens from the smooth surface is not high, and there will be a yellow spot and a one-size-fitted projection light. We commonly call it: "moon light."

In order to improve the "moon light" of the glossy convex lens, the convex lens is processed in two ways, one is to perform bead surface treatment on the convex surface of the convex lens, or to perform convex lens sanding treatment, and more to perform frosting treatment. The advantage of the matte treatment is that the uniformity and softness of the spot during the entire zooming process are good, and the disadvantage is that the light transmittance is not high and the light effect is lost. At the same time, the frosting process double-mixes the light, and the light quality is not pure, and has the feeling of chaos. The light is not high in the clarity, authenticity and reductivity of the object.

The use of a frosted convex lens for zoom LED technology, although cost-saving, but the lack of a convex lens of the light-receiving system plus frosting treatment, the loss of light efficiency of 60% -80%, that is, the light-emitting efficiency is only 20-30LM / W . Although the frosted convex lens can achieve a very narrow angle of 6-9 degrees, the light intensity is greatly reduced. The light control method using a frosted convex lens for zooming can be applied to a dark environment such as a museum or an art museum, but there is nothing in the museum museum of relatively high altitude, and the power of the lamp can only be increased to 30 W or more. And the economy is not enough, which is why the stage lights do not move up to hundreds of watts of power. The mainstream museum lighting manufacturers at home and abroad use the frosted convex lens to control the light. However, such a light control method is difficult to meet the requirements in the commercial lighting field.

In addition, in addition to the traditional convex lens, the most advanced LED zoom light control technology is a frog eye collimating zoom lens, which looks like a frog's eye, so it is called a frog eye collimating zoom lens (referred to as a collimating zoom lens). The collimating zoom lens has a dual concentrating and astigmatism system, which has a high-concentration concentrating effect and achieves a strong light function. At the same time, the light-transmitting PMMA material is used, the light utilization rate is very high, and the zoom stroke is short and the light loss is low. The only drawback is that the matching of the collimating zoom lens with the LED is difficult, and the LED iteration speed is very fast, the probability of development failure is very high, and the development cost and risk involved are often very large. Even if the development is successful, tracking LED iterations will be very expensive to maintain update development costs.

Mainstream manufacturers at home and abroad are almost afraid to invest in this area, and the risks of failure and development are too great. The three-zoom zoom is also one of the few domestic manufacturers to invest in the field of collimation zoom optics. This is also related to the experience of zooming applications with three-zoom zoom for more than ten years, but the three-zoom zoom has also suffered. So what are the advantages and disadvantages of the frog eye collimating zoom lens and the matte convex lens?

Through the above comparison, it is found that the three collimable zoom lens is compared with the convex lens. The entrance angle of the three collimable zoom lens is 144 degrees, while the conventional convex lens is only 80 degrees, and the three collimable zoom lens does not need to be matte. Good light shape and spot effect can be obtained by processing. Therefore, the collimating zoom lens can obtain very good light output, and the advantage is very obvious. So, in the end, the light effect can be improved to the extent that the three zoomable 20W zoom track lamp parameters can be compared.

From the test results, the three-zoom 20W rail zoom lamp has an illumination of more than 3000LX at a distance of 3 meters at a 10 degree angle. Compared with the use of matte convex lens Enke 35W zoom rail light mentioned by Yunzhiguang public number, the illuminance of 3 meters in 12 degree light output is only several times more than the data of 740LX, although the angle is somewhat different, but Enke zoom rail light power Larger.

There are so many advantages in collimating zoom optics. Is there any shortcomings and shortcomings? Everything has a double-sidedness. Although the collimating zoom optical lens can achieve high light output, it uses a collimating zoom lens. When applied to high-power COB light control, it is difficult to obtain a very narrow angle of 6 degrees of the frosted convex lens. This is also limited by the LED's illumination technology. At present, the three-lens zoom can obtain 10 degrees of light output in the 20W power range, and is also trying to break through the 6-degree narrow light output in the power range.

In addition, collimation zoom optics is much more difficult to handle spot softness and uniformity during zooming than matte convex lenses, requiring constant technical effort. At the same time, it also faces the light source and matching risk brought by LED upgrade.

In the future, domestic lighting manufacturers will also break through the shortcomings of low-efficiency LED zoom technology, and successfully apply LED zoom technology to the general lighting field to achieve long-term international competitiveness. So which direction will the LED zoom technology develop in the future?

In the future, LED zoom may move toward a narrower control angle, or a mixed color zoom direction, and will progress with the technological advancement of LED chips. At the same time, the zoom technology will also develop from the current coaxial zoom to the future direction of the different axis or the zoom of the crankshaft, and the three zooms also have the corresponding technology accumulation in the off-axis zoom (3D zoom), and have achieved related technology patent.

Source: Three-visible WeChat public account Editor: Yan Zhixiang

If you need to purchase lamps in bulk, please contact us.WOSEN is a professional manufacturer and supplier of Led Flood Light, Led Street Light, Led Solar Light, etc. For more information, please visit https://www.wosenled.com/ or contact admin@wosenled.com or WhatsApp +86-13425434349