Improving iOLED technology. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

Improvement of iOLED technology

12.07.2016

As you know, the weak point of organic light-emitting diode (OLED) panels is their fragility. Back in 2013, NHK figured out how to deal with the fragility of OLED. They changed the structure of the display by swapping the anode and cathode layers, and added a protective layer on top of the cathode. This prevented the destruction due to oxidation, leading to a drop in the brightness of the OLED. Moreover, since we are talking about oxidation, the brightness is maintained even if the display does not have a sealed design. The development, carried out jointly with Nippon Shokubai, received the designation iOLED (i - from inverted, "inverted").

Unfortunately, the first iOLED prototype had another drawback - the organic material used in it was destroyed by the current. As a result, the service life was even shorter than conventional OLED panels.

Last year, an iOLED display with extended life on a film substrate was created. True, it had to increase the supply voltage from 3,9 V to 5,6 V, sacrificing the internal quantum efficiency, which decreased from 100% to 70%. A prototype full-color iOLED display shown last year, it was on all the time (video was displayed on it), and recently it was demonstrated again to show that it has not lost its functionality in a year.

In addition, the manufacturer demonstrated a new red iOLED device, which uses a different organic material, which made it possible to reduce the voltage to 3,7 V. At the same time, the internal quantum efficiency returned to 100%. In the bottom illustration, the old and new LEDs are supplied with the same voltage so that you can compare the brightness. The service life of the novelty is estimated at no less than 10 hours. Now, the task for NHK specialists is to accelerate the development of green and blue iOLEDs with the same service life.

<< Back: Photon from a nanotube 13.07.2016

>> Forward: Severe hereditary diseases protect against infections 12.07.2016

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

Self-healing concrete 19.06.2021

In Massachusetts (USA), researchers at the Worcester Polytechnic Institute (WPI) have invented a concrete that can self-fill cracks of a few millimeters in 24 hours. Concrete is the most widely used man-made building material in the world, but it is brittle and prone to cracking under the influence of water, thermal changes, stress, road salt and other factors.

To produce a new type of material, Worcester scientists used an enzyme found in red blood cells - carbonic anhydrase. This made concrete four times stronger than traditional concrete. Self-healing is made possible by the fact that carbonic anhydrase reacts with carbon dioxide from the air, resulting in the formation of calcium carbonate crystals that fill cracks in concrete, strengthening the structure.

The new method significantly extends the life of concrete structures and eliminates the need for costly repairs or replacements. In addition, the invention will significantly reduce the amount of carbon dioxide emissions harmful to the environment.

"If tiny cracks can be automatically repaired as soon as they appear, they won't turn into big problems that require repair or replacement. It sounds like science fiction, but it's a real solution to a significant problem in the construction industry," the scientists say.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews