OLED aimed at lighting the protagonist (five): the use of transparency and flexibility

NovaLED and OSRAM have developed a light panel that can be turned off when the power is cut off (Figure 13). The problem with this transparent panel is that if you do not take certain measures, the front and back will shine. This is because, in the OLED lighting, generally used by the negative electrode of aluminum and other metal electrodes, or metal base plate to play the role of reflection, and these components must also use transparent materials. If the window is transparent, it is not only in the room, it is easy to shine brightly outside the room.

Maximize transparency and flexibility

To catch up from behind OLED lighting, even if the brightness of high performance, low cost and light source, with the existing lighting competition is not easy. This is because, including the installation of lighting appliances and equipment, such as the vast scale of the replacement work is essential.

Therefore, some manufacturers will be put on the development of the power to play the characteristics of OLED lighting panel. Transparency and flexibility.

Figure 13 through the integration into the transparent substrate, so that the use of OSRAM to broaden the photoelectric in December 2007 produced a trial of transparent OLED lighting (a). Transparency of 55%, panel area of 90cm2. Seiko EPSON produced a glass substrate on the formation of a number of micro OLED elements of the headlamps (B). The principle is that the Al layer acts as a negative electrode for the OLED to mask and reflect the light, so that the light is emitted only in one direction of the transparent panel (C). The utility model is suitable for the display of the small screen reflection type liquid crystal panel, the electronic paper, and the like. (a) provided by OSRAM optoelectronics.

For example, Novaled and OSRAM have developed a light panel that can be turned off when the power is cut off (Figure 13). The problem with this transparent panel is that if you do not take certain measures, the front and back will shine. This is because, in the OLED lighting, generally used by the negative electrode of aluminum and other metal electrodes, or metal base plate to play the role of reflection, and these components must also use transparent materials. If the window is transparent, it is not only in the room, it is easy to shine brightly outside the room. In this regard, "although the details are not released, but not the reflection board, but in the component level to achieve one-way light technology is being developed" (OSRAM OLED Karsten Heuser director of photoelectric technology).

Seiko EPSON released the SID 2008 Workshop on the direction of the direction of the light-emitting technology in the direction of 8. The company's approach can also be used as an option.

Volume to volume type EL lighting waste heat for 2 years, or 10 years?

If the realization of another feature "OLED lighting flexibility", so in terms of shape, thickness, use and cost, the image may have better lighting. Currently, GE, Konica Minolta, as well as some European research institutes are actively engaged in this research (Figure)

Figure 14 volumes on the roll manufacturing devices have been published in March 2008, GE announced a volume to volume production of a 8 inch wide OLED lighting panel (a). Holst Centre, with the aid of inkjet technology, developed a flexible OLED panel (b) based on PEN film. The first generation roll to roll manufacturing device capable of producing 30cm wide panels is also ready. In June 2008 Fraunhofer IPMS introduced a device that can be implemented in a volume to volume manner, and was formed by a vapor deposition method (C, D). Will start operation in the fourth quarter of 2008. Support wide 30cm, 0.2 ~ 0.5mm thick floor. (c) provided by Fraunhofer IPMS.

GE has completed a 8 inches (about 20cm) wide OLED lighting panel trial production by volume. The first batch will be available in 2010.

GE cooperation with Konica Minolta, although there is no division of responsibility to disclose the development, but the company has also completed a flexible OLED lighting trial. "When the conversion by the evaporation method finally catch up with us 2 years ago, 64lm/W achieved the efficiency of other companies, we are also in the coating method, one step ahead" (Konica Minolta komamura), showing the company's confidence in the discourse.

In addition, there are views expressed doubts about the feasibility of this approach. According to these ideas, "2010 to come up with flexible product is not possible" (ongoing evaporation technology developed by Japan's domestic researchers), "to do lighting products like newspapers, at least also need to spend 10 years" (Philips Research Elsbergen). However, some opinion, "compared with lighting products is difficult to achieve the position of the OLED display also carried out research in this area, (flexible OLED lighting) compared with technically easier" (European OLED lighting technician). In a similar OLED lighting technology, organic thin film solar cells, the United States (Konarka Technologies) Konarka technologies announced on October 2008 to start the roll to roll production module.

In volume to volume OLED lighting, Fraunhofer IPMS is also scheduled to be put into production in 2008. The device forms a layer on a flexible base plate by a vapor deposition method. From the point of view of the use of low molecular materials in the past, this method is more feasible.