Zhang Subing: OLED is expected to become the next generation of technology representatives

Zhang Subing, senior engineer, China Institute of electronic technology standardization.

Along with the digital television terrestrial transmission standards and the implementation of the national pilot signal ground and national industry policy "to encourage the development of digital television industry a number of policy" officially released, the development of China's digital TV industry ushered in a new opportunity. In addition, with the Olympic Games, with LCD (liquid crystal), PDP (plasma) flat digital TV as the representative of the obtained new development in products, technology, towards a large screen, high resolution (FULLHD), the moving image effect, better and more wide perspective and more colorful reduction the ability of development.

LCD, PDP technology continues to progress

From the past few years, the development of flat panel display technology, LCD and PDP continue to develop new technologies, in the screen display has made better progress.

PDP TV market, launched 42 inches and above full HD products, provide the image details better; the new phosphor in display manufacturing, greatly improving the color gamut coverage; using 3D digital color processing, improve the color reproduction; processing circuit used in fast motion compensation technology and high-definition image processing technology. To further improve the image dynamic effect; the next generation PDP module will have thinner thickness and lighter weight, lower power consumption, higher contrast.

LCD TV, the screen size is expanding, there are 40 inches, 42 inches, 47 inches, 50 inches, 65 inches, up to 108 inches, more and more full HD products; the wide viewing angle display manufacturing technology, can improve the visual angle; new technology BlinkingBacklight, BlackInsertion, 120Hz driver and other commonly used, reduce the time of motion image tailing; in color gamut coverage, screen production line with new technology, improve the color gamut coverage index.

Pursuit of comfort is the ultimate goal

In the previous publicity and technology development, the majority of companies always want brighter brightness, contrast, color is more bright, through a variety of technical means to enhance physical indicators. But with the flat-panel TV more into the family, consumers of flat-panel TV knowledge is becoming more and more understanding, at present, the pursuit of physical indicators from blindly to enhance the development of more attention to the human subjective feelings gradually become the common goal of enterprises and users.

For example, in brightness should not simply pursue improved brightness but looks brighter; in contrast with best contrast for viewing; in color restoration with high color purity and color as the goal, to achieve the feeling of bright colors; in gray scale to achieve a smooth transition, natural movement let's look more natural movement; to see the extent of interference in terms of interference. Through the promotion of these subjective feelings, so as to achieve a comfortable viewing effect.

At present, there are more and more researches on this field in the world, and the "ergonomic condition" which is needed to meet the needs of flat-panel TV becomes a research hotspot. The international standards organization also actively carry out the corresponding research standards, such as ISO, is the original standard with the increase of flat-panel display content, gradually formed and perfect subjective evaluation methods, optical analysis, flat panel display for ergonomic requirements for flat panel display standard. In our country, the research of this aspect is also carried out step by step.

OLED is expected to become the next generation of technology representatives

On the basis of continuous improvement of LCD, PDP technology, enterprises pay more attention to OLED (organic light-emitting diode) as the representative of the next generation of display technology research and development, and has made some progress. Such as SONY demonstrated 11 inches OLED-TV example, Epson demonstrated a OLED-TV example of 8 inches, Samsung developed a thickness of only 4.3 mm OLED-TV 31 inch prototype. Expected, OLED-TV will break the FPD industry in 2011, and LCD-TV to compete in full swing.

Compared to the current technology matures LCD, plasma flat-panel TVs, OLED TV has many of the former can not match the technical advantages. First, the OLED TV display can be made thinner, OLED display can use different material substrate, so OLED TV can be divided into hard and soft screen, a wider range of applications. Second, OLED using organic light-emitting materials, screen brightness is better than LCD TV, strong contrast, soft color, vivid picture. Third, OLED has a wider viewing angle, with virtually no restrictions on the viewing angle. Fourth, compared with other flat panel technology, OLED display material is less, the manufacturing process is relatively simple, so the manufacturing cost is relatively low. But at present, the main bottleneck is the size of OLED can not do.

In addition, flexible display technology has also made some progress, the relevant enterprises have developed a resolution of WXGA (1280 x 800) thickness of only 0.3 mm A4 flexible color electronic paper.

Laser display technology with large color gamut, high color saturation, longer life and lower power consumption is also an important core technology for the next generation display. At present, China is in the leading position in this technology. In 2007, China launched the DCI digital film specification of the laser digital film projection prototype.

With the advent of the HD era, wireless HD transmission, 4K HD, 3D TV, the new super flat design, with TV to provide network services will become the main features of the post HD era.

Source: Chinese electronic newspaper