China's new OLED application has broad prospects


The latest issue of the American Journal of Applied Physics published a new study from Chinese researchers—a stack of low-cost, high-efficiency stacks developed by scientists at the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. Type organic light emitting diode.

An organic light emitting diode (OLED) is a thin film light emitting diode (LED) whose emission layer is an organic composite. The processing of these devices is much lower than traditional LEDs. It can be used as a display for TV screens, computer displays, portable systems, and for lighting equipment. One of the biggest benefits of OLED display over traditional LCD displays is that it does not require a backlight, which means it requires less current, and it can work longer with the same battery, making it widely available for small portable applications. Devices, most of which use a monochrome, low-resolution display to reduce power consumption.

Organic light-emitting diodes are considered to be one of the most important flat panel display technologies in the future. They also show great application prospects in the background light source and lighting fields, and become the hot research field today. Through their own efforts, Chinese researchers have achieved proud results in this field.

A light-emitting diode is a type of semiconductor diode that converts electrical energy into light energy and has been widely used in daily life. Compared with incandescent lamps, LEDs have the characteristics of good operating voltage and current, good impact resistance and long life. However, the light-emitting diodes are generally made of inorganic semiconductor materials such as gallium, arsenic, phosphorus, etc., and the process is complicated and the cost is high. In addition, ordinary inorganic light-emitting diodes are point light sources, which are difficult to apply to large-area components requiring high resolution, and it is impossible to make them very secure.

The research team led by researcher Ma Dongge of the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences has made organic light-emitting diodes using carbon-based organic materials similar to plastics. The processing is relatively simple and low-cost, and the organic light-emitting diode is a kind. A surface light source with a large light source area.

The experimental results also show that the organic light-emitting diode requires only a single light-emitting layer to achieve high efficiency without requiring multiple complex light-emitting layers; the unit organic light-emitting diodes are connected in series to achieve higher work efficiency. “Simple single-emitting layer, high efficiency through laminated structure, 110cd/A (current efficiency) efficiency should be the higher efficiency of current white light devices.” Ma Dongge said that they developed organic light-emitting diodes at cost and illumination. The advantages of mode and other aspects are obvious, and it has good application prospects in the fields of illumination and display backlight.

It is reported that since the world's first high-efficiency OLED was successfully launched in the United States in 1987, the development of OLED has attracted widespread attention from the world's industrial and scientific circles, and has begun to develop rapidly around the world. "We started OLED research in 1996, especially in recent years, we have done a lot of work in this field, developed high efficiency, long life red, green and blue OLED, and also developed high efficiency white OLED. And is promoting its industrialization." Ma Dongge said.

It is understood that from the aspects of OLED structure, preparation process, drive circuit and luminescence performance, it has many advantages: thickness 雹 light weight, its core thickness can be less than 1 mm, about 1/3 of LCD; all solid state structure It has good shock resistance and can adapt to harsh environments such as huge acceleration and vibration. Its response speed is about several microseconds to tens of microseconds, 1000 times faster than LCD, and it can display moving images. It has less material consumption and simple preparation process (generally only Need 86 processes, and LCD requires 200 processes), cost at least 20% lower than LCD, easy to mass production; low DC voltage drive (minimum voltage is only 3 volts), low power consumption (2.4 inch poly OLED module work) It consumes 605 microwatts; it can be made into a flexible display that can be bent on substrates of different materials without backlighting.

Many advantages have determined its broad application prospects. At present, Japan, the United Kingdom, Germany, the United States and the Netherlands have made great achievements in OLED, but they are still in the experimental stage, and the market share is very low. Because of its technical problems, there are still some problems to be solved.

Such as poor stability, low life, color maturity combination process is not mature. "Although there are no OLED products in the world, but foreign products are expected to come out in 2010 and 2011, we are also tracking the world's frontiers and accelerating the process of industrialization." Ma Dongge said, "White OLEDs should be applied, now Efficiency, life and cost issues must be addressed. In addition to material cost reduction, simplified structure should be the most important process to reduce costs. In addition, lamination is the most important device structure for achieving high efficiency and long life of OLED, with important application development. value".

The insiders pointed out that the OLED industry has attracted the attention of the whole world, especially the domestic "eyeball", firstly because OLED is a potential flat display product in the future, which meets the hardware requirements of ultra-energy saving, low cost and environmental protection. In addition, OLED products are in the early stage of development, and new application areas need to be developed. China has the opportunity to be at the leading level in the field of OLED. In addition, the state has made great efforts to develop the flat panel display industry as a policy orientation, and many investments can support the development of the OLED industry.

Ma Dongge believes that if China's organic light-emitting diode products want to reach the world's advanced level in terms of technology and quality, and achieve industrialization well, it is necessary to continue to improve the efficiency of devices under high brightness, develop new processes, and reduce costs. To meet the requirements of industrialization, improve the uniformity of large-area, continue to improve the stability of the device and solve the industrialization process and technical problems, and do a good job in market development.

Outdoor Access Point

What is an outdoor wireless access Point?
Outdoor Wireless Access Points (aps) are wireless networking devices designed to provide Wi-Fi coverage in outdoor environments and are often used in industrial and corporate environments that require outdoor Wi-Fi access, as well as in public Spaces such as parks, stadiums, campuses, and outdoor event venues.

Outdoor wireless access points are built with a variety of weather conditions and tolerance to high temperatures in mind, so they are often equipped with weatherproof enclosures to protect internal components from moisture, dust, and other environmental elements. In addition, outdoor wireless access points are equipped with high-gain antennas that enable long-range coverage while simultaneously supporting multiple devices. Some outdoor wireless access points also have grid networks that connect a large number of wireless access points to provide seamless Wi-Fi coverage over a wide area. To protect the security of the network, outdoor wireless access points are also equipped with advanced security features such as WPA3 encryption and guest access restriction. As an important component of outdoor Wi-Fi infrastructure, outdoor wireless access points provide a reliable and secure connection within a certain range of the external environment.

Why are outdoor wireless access points important?
Here's why:

In order to provide reliable and fast Wi-Fi coverage in outdoor environments, outdoor wireless access points must be equipped to cope with the increasing use of mobile devices and meet the wireless connectivity needs of public places. This will support individuals to stay connected, allowing them to use the Internet in public Spaces such as parks, stadiums and universities.

For many organizations and industries, outdoor Wi-Fi connectivity is essential for daily operations. For inventory management and control systems, wireless facilities and warehouses must use wireless communication. These systems must be supported by wireless access points.

Wireless access points can support new applications such as outdoor video surveillance, smart lighting and environmental monitoring. Without outdoor wireless access points, many applications that require wireless connectivity will be difficult to sustain.

Visitors expect Wi-Fi connectivity in public areas such as parks and stadiums. Businesses that provide outdoor Wi-Fi can significantly enhance guest interaction and improve the overall customer experience.

All in all, outdoor wireless access points are equally important to businesses and companies because they allow them to reach out far beyond their original physical premises, reaching out to potential audiences that would otherwise be out of reach.

What are the important characteristics of outdoor wireless access points?
The following characteristics of an outdoor wireless access point are important:

Weatherproof and durable design: Outdoor wireless access points must be able to withstand harsh weather conditions and extreme temperatures. In addition, a weatherproof case is required to protect internal components from moisture, dust, and other environmental elements.
High-speed connectivity: In order to provide service to a large number of users and devices, outdoor wireless access points should provide high-speed connectivity.
Advanced Features: To provide high performance and powerful support for a wide range of devices, outdoor wireless access points should have advanced features including beamforming, MU-MIMO technology, and grid networking.
Simple installation and management: Outdoor wireless access points should be built with centralized management and monitoring capabilities backed by a cloud-based platform for easy installation and management.
Power options: Depending on the deployment area and power availability, the outdoor wireless access point should accept multiple power sources, such as PoE (Power over Ethernet) or direct AC power.
Security: To protect the network and users' data, outdoor wireless access points should include security features such as WPA3 encryption and guest access restrictions.
Customization: To accommodate diverse deployment Settings and extend coverage, outdoor wireless access points should include retrofit options including installation kits and antennas.
Simply put, outdoor wireless access points should be built from the outset to ensure that they provide reliable, high-performance wireless connectivity in demanding outdoor environments, while ensuring that they are easy to install, manage, and provide advanced features and customization capabilities.

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