Meet the needs of high lighting, luminous efficiency / service life into a development focus
Take NASA's aerial photo at night as an example. The highlights shown in the aerial photo are artificial light sources, and the United States, Japan, and China can all find many bright spots. In the United States, for example, electricity consumption accounts for one-third of the total US energy supply, with lighting accounting for about one-fifth of the electricity, which means that lighting demand accounts for one-fifth of the overall energy supply.
In terms of the proportion of energy consumption, the United States has the largest proportion of air-conditioning power consumption, followed by lighting. Similarly, China is located in the temperate/subtropical zone. In general, the air conditioning demand of the general buildings is large in the summer. The air conditioning power consumption ranks first in energy supply, and the lighting ranks second, accounting for 21.5 to 30.5% of the electricity consumption. It is not difficult to observe from the above data. I found that the lighting consumes a lot of power.
In order to save energy consumption, high illuminance and long-life lighting tools are more urgent. In retrospect, the use of light bulbs often fails to meet the demand and is easy to burn out. However, the fluorescent tubes currently in common use are not suitable for large-area and uniform. Lighting source. At this moment, OLED lighting with light, thin, soft, transparent and other characteristics has become a new favorite for lighting with large area illumination and uniform brightness. Different from light-emitting diodes (LEDs) and fluorescent lamps, OLEDs can adjust brightness and color, and are quite suitable for situational lighting.
According to the light emission direction, the lamps can be classified into a Directional Lighting and a Diffusive Lighting. The former is applied to the headlights and the display lights; the latter is applied to general public places.
According to the division of lighting demand, diffuse lighting demand belongs to the lighting needs of large-area environment, and OLED is just suitable for such applications. In terms of luminous efficiency, experts pointed out that the higher the efficiency, the more power-saving, the luminous efficiency of the bulb is only 20lm/W; the luminous efficiency of the energy-saving bulb is about 20~40lm/W; and the fluorescent lamp currently in common use For the temperature range of 40-100 lm/W, the above-mentioned light source products are gaseous light sources, and the future is the era of solid-state lighting sources. The so-called solid-state light sources are, for example, light-emitting diodes (LEDs) or OLEDs.
According to statistics, LED luminous efficiency can reach 100lm/W, OLED is still in the research and development stage, the maximum can reach 102lm/W, the solid-state lighting of the two can even reach the high luminous efficiency of 200lm/W, with such high luminous efficiency characteristics. Hope to become the mainstream of future lighting.
Many advantages set OLED lighting
Although the OLED lighting products are still in the research and development stage, their advantages are still numerous, not only have the characteristics of being bendable and soft, but also can be arbitrarily punched in the thin OLED lighting such as candy paper, and it is not damaged and maintains normal lighting, and can even be arbitrarily Cutting, and therefore will be able to avoid breaking the bulb repeatedly.
On the other hand, on the technical level, LEDs generate a lot of heat and require a heat dissipation mechanism, but OLED lighting does not. If the OLED lamp is illuminated together with the fluorescent lamp, it can be found that the temperature of the fluorescent lamp will rise from room temperature to 50 ° C; the temperature of the OLED lamp will only rise from 20 ° C to 30 ° C after lighting, which can eliminate the danger of the user being hot. Meet safety considerations.
OLED lamps have higher product advantages in terms of transparency, heat dissipation and thinning. LEDs currently have high luminous efficiency and mass production, but luminous efficiency and service life are worse than OLEDs (Fig. 2). Overall, the advantages of OLED lamps are high luminous efficiency, suitable for large-area surface light sources, fast switching speeds, and regional phenomena for light sources, such as the warm-light source in the EU, Asia, such as Japan, China and other places like brighter white light sources, and OLED lights can also adjust colors to meet various color requirements. In addition, the material is soft, easy to cut, light in shape, and low in driving voltage, which is quite environmentally friendly.
However, why OLED lamps with many advantages are still not mass-produced, mainly due to three major problems: brightness, service life and luminous efficiency. The general lighting demand must reach more than 1,000 cd/m2. However, if the OLED lamp does not meet this standard, the brightness must be increased, and the luminous lifetime can be increased by more than 10,000 hours, and the luminous efficiency must be increased to 30 lm/W. In addition, the production of mass production still has to pay attention to the uniformity of brightness and color rendering (CRI). The higher the color rendering, the more vivid the color is. Therefore, CRI must be more than 80%. The price must also be lowered in order to be popularized in the market.
OLED light business opportunity attracts attention from lighting manufacturers
As OLED lamps are expected to become the new mainstream of future lighting, many manufacturers are also actively investing in research and development. Experts pointed out that Europe, Germany, the United States, Japan, South Korea and other places have adopted project methods for research. The project research mainly focuses on high efficiency and long life, such as the European OLED 100.eu project. What is more noteworthy is that in order to realize the early commercialization of OLED lighting, the European OLED 100.eu project even includes the price in research and development. . Emphasis on the price of OLED lighting per second is 100 euros, which makes OLED lighting have competitive prices in the market. The manufacturers involved in this project include Siemens, Frauhofer, IPMS, Philips, Osram, etc., among which there are many international lighting manufacturers, and these manufacturers even include upstream material suppliers and equipment vendors, which is enough to see the growth of OLED lighting.
Although LED is currently an illumination source with high luminous efficiency, the United States predicts that the increase in LED luminous efficiency has gradually slowed down. Even though the mass production time of OLED illumination is later than that of LED, it has a tendency to catch up.
However, the United States predicts that OLED lighting will be truly mass-produced after 2010, and will catch up with LED luminous efficiency in 2016.
Experts explained that the number of manufacturers investing in OLED research in the world is about 56 according to statistics. Among them, 27 companies have increased their participation in materials, accounting for 48% of the total investment companies. Such high proportion of data also highlights the difficulty of material improvement. International lighting companies such as OSRAM, Philips and GM are investing in intellectual property such as patents.
In addition, in January 2007, Philips and Osram exchanged OLED and LED patents to announce the development of the solid-state lighting market. In 2004, Philips has abandoned the research and development of OLED displays and invested in OLED lighting research. In January 2007, OSRAM focused on the development of lighting, and even ended the OLED display factory, which can be sniffed by international manufacturers. The mainstream business opportunities of solid-state lighting and increasing trends.
Philips has been educating lighting designers and artists since 2007, explaining OLED lighting products, enabling them to master the lighting design time to promote downstream manufacturers to purchase OLED lighting related products, so Philips is optimistic that OLED lights can be It was officially mass-produced in 2009, and at the International Lighting Fair in Milan, Italy, in April 2009, it was introduced as a new concept luminaire called "the world's first OLED interactive lighting". GM believes that it will be mass-produced in 2010. In addition, Lumiotec, Konica Minolta and Osram will be able to see the commercialization of OLED lamps in the market in 2011.
Unique advantages of OLED lighting for a variety of application scenarios
Experts further explained that OLED lamps must find a unique lighting market in order to have market development. The international manufacturer Osram uses OLED lamps on glass substrates to combine a whole OLED lamp into a table lamp or a surface light source. GM is focusing on soft OLED lights. In December 2007, it released soft OLED lighting related products. Even at Christmas, it woven its products into a Christmas tree shape, showing that LEDs or light bulbs are not needed as a Christmas tree light source. It can be replaced by a thin, soft OLED lamp.
In terms of application scenarios, OLED lights can be used in drawers, which can be lit when the drawer is opened, so that they can be used to find things; or they can be applied to the mirror, and the OLED lamp is placed outside the mirror to fill the light for makeup.
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