Since Tsinghua University/Beijing Weixinnuo first introduced 2.7-inch PMOLED in 2000, in 2003, Tsinghua University completed the breakthrough of key technologies of OLED and the integration of production technology, realized the small-volume production and sales of OLED screens and modules, and declared China's softness. A major technological breakthrough in displays. Through the soft plastic screen as thin as candy paper, you can watch the animation film and other innovations, which makes people stun the application of OLED in the display. However, OLED is also used in the lighting market due to its thin, easy to carry and environmental protection. In turn, a wave of innovative applications for lighting has been launched. The development of OLED lighting technology from Philips, Osram, and GE has highlighted the future of the lighting market.
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.