Prior to the news that the Apple Corp is seriously considering the use of OLED screen in the iPhone series products, to give up their use for many years LCD screen. And the news that Apple supplier screen LG display will be interested in them in South Korea Gumi LCD screen production line more transformation for OLED screen production line, plans to let the production line in 2017 to enter mass production of OLED screen.
In Apple's new wearable devices Apple watch, apple to this product is equipped with flexible OLED screen, LG and Samsung display is the two main suppliers of Apple watch screen. Every pixel of the OLED screen is capable of self - emitting, without the need for backlight, so as to compare with the LCD screen, the OLED screen can do a thinner, power consumption will be lower. For Watch Apple such a small wearable device, can save space, so that the maximum battery life is very important. But it is clear that apple can refer to these characteristics to the iPhone series products. OLED screen in addition to allow the device to become thinner and less power consumption. It can also improve the color saturation of the equipment, precision and brightness, based on plastic OLED flexible can become higher, can be made of translucent and almost indestructible.
The basic structure of the OLED is a thin, transparent and transparent indium tin oxide (ITO), which is connected to the positive electrode of the electric power, plus another metal cathode, which is a structure like a sandwich. The entire structure layer includes a hole transport layer (HTL), a light emitting layer (EL) and an electron transport layer (ETL). When the power supply to the appropriate voltage, cathode hole and the cathodic charge will be in the light emitting layer in combination with to produce light, according to the formula of different produce red, green and blue three primary colors of RGB, constitute the basic color. The OLED characteristics is their luminous, unlike the TFT LCD need backlight, so the visibility and brightness are high, followed by low voltage and high power efficiency, and quick response, light weight, thin thickness, simple structure, low cost, is regarded as one of the most promising products in the 21st century.
As the basis of indium ITO target materials, the importance of OLED is self-evident. Indium ingot because of the light permeability and electrical conductivity, mainly for the production of ITO target, this purpose is indium ingot is the main consumption areas, accounting for 70% of global consumption of indium. Metal indium already in 2011 in the Pan Asia nonferrous metal exchange traded, as the world's largest rare metal exchange, the indium amount of business inventories has reached more than 3600 tons, the future will through the international foreign channels achieve interoperability and downstream industries. The pivotal role in the international indium industry in Pan Asia will be more and more. (Tao Jin)