LED backlight technology drives traditional industry upgrades
In recent years, LCD TVs with LED as backlight have the characteristics of light and portable, delicate picture, mercury-free environment, high brightness and high color gamut. Many TV manufacturers are gaining momentum, and more and more TV brands are added to LEDs. In the battle for the market share of backlight TVs, Li Xiaofang, president of Skyworth Group Display Technology Division, also predicted that LED backlight LCD TVs have quickly entered the consumer's field of vision. In the first quarter of 2010, the ratio of LCD TVs using LED backlights was about 10%. In the fourth quarter of 2010, it will grow rapidly to 30%, and it is expected that there will be opportunities to exceed CCFL backlight shipments in 2012. Due to the rapid growth of LED-backlit TVs, LEDs have been greatly boosted, and backlights are becoming one of the mainstream applications for the development of the LED industry. The rapid expansion of the LED-backlit TV market has indeed demonstrated broad market opportunities. At present, there are still many technical problems to be overcome in this product, so the speed of technology update is quite fast. Three backlight technologies are better than the best There are three types of LED backlight technology: a direct-lit three-color RGB-LED light source, a direct-lit white LED light source, and a side-mounted white LED light source. Among them, the earliest appeared is the three-color RGB-LED technology. Compared with the traditional CCFL backlight technology, the advantages of RGB-LED TV are mainly reflected in the two aspects of color expression and contrast: RGB-LED TV has a wide color gamut of NTSC 120 due to the use of RGB three primary color independent light-emitting components. More than %, some well-tuned models can even reach a color gamut of about 150%, RGB-LED TV can also support backlight area adjustment technology, brightness adjustment is very easy to achieve, so in terms of contrast, it can often Achieving tens of millions of dynamic contrast, which is very important to improve the image quality of the TV. Due to the obvious advantages of RGB-LED technology, Sony, Sharp, Samsung and other color TV giants have invested heavily in research and development. Some products based on RGB-LED technology have also been introduced, but the price is too high. From the emergence to the present, although RGB-LED technology has developed over the years, there is no substantial reduction in cost. Slowly, these companies have reduced the R&D investment of RGB-LED technology, and the RGB-LED market is gradually becoming more and more small. Although Sharp has introduced a small number of RGB-LED products, it is expensive as the high-end products of Sharp, and the market is difficult to popularize. Since the end of 2009, LCD TVs using white LED backlights have been appearing in front of people. LED backlights such as Samsung, Hisense, Konka, Skyworth and other domestic companies have adopted white-light side-in LED backlights, covering the 26-47-inch full range. Other manufacturers including Sony, Sharp, Changhong, Tongfang, etc. have launched their own white LED light source LCD TV. At present, direct-lit white LEDs and side-entry white LEDs are among the representative manufacturers. For example, Sharp, Skyworth, Hisense, etc., which push down the white LED TV products and chips, and Samsung, Sony, and Tongfang, which push the side-in white LED TV products and chips. Cost determines the direction of technology From the point of view of process design, the white LED direct-down structure is the easiest to replace the traditional LCD backlight application method, and its technical difficulty and the need to modify the product design are minimal. In contrast, the side-in white LED technology has its advantages. However, since the purpose of the side-in type structure is mainly to design a slimmer TV set, the original host power supply, circuit, screen power supply and heat sink of the LCD TV need to be improved. This will also lead to an increase in the cost of side-in white light, making the short-term overall machine cost higher than the more complicated direct-lit white LED TV of the backlight module. The advantages of direct-lit white LED technology in picture control are obvious, which will make the technology of this technology superior to the side-in white LED technology in the final image display capability. Both white light technology genres have their own advantages and disadvantages, depending on who is industrialized faster. At present, Samsung LED TVs have the largest sales volume, and the chance of side-entry replacement of CCFL is larger. However, with the large-scale promotion of domestic enterprises such as Hisense and Skyworth, the future is dominated by direct-type or side-entry. The mainstream still needs the market to make decisions. In contrast, the RGB-LED color gamut performs slightly better. The disadvantage is that the cost is higher. The price of the finished TV product is still difficult for ordinary consumers to accept. The white LED light source is slightly inferior to the RGB-LED in the color gamut. Its relatively high contrast and affordable cost are unmatched by RGB-LEDs. The thermal effect problem has not been solved perfectly. The direct-type LED large-size backlight has a certain amount of light-mixing height, which helps the heat dissipation, and the heat-dissipating plate is correspondingly formed on the entire LED large plate to achieve the heat dissipation effect. Since the power of the LED lamp is relatively high now, and a certain amount of energy is released in the form of heat, and the backlight has high requirements on heat dissipation, it is a challenge to the prior art. Some experts believe that in the development trend of technology, there are white LED technology of blue LED + RG phosphor as an alternative. Due to its better color gamut and moderate price, it is likely to become a compromise solution for LCD TV backlights. Due to the complicated technology of the direct-type RGB-LED light source and the difficulty in mass production, the current large-scale marketing is difficult, so there are few products using this application mode. The competition for the three LED light source solutions is actually the battle between the direct-lit white LED and the side-in white LED. In the existing market direction, the side-entry white LED competition has benefited from the light guide plate yield, the heat dissipation cost is reduced, and the LED efficiency is improved, so that the side-entry white LED has become one of the important backlight modes. Side-in white LED dynamic control technology, direct-lit white LED and 2D regional dynamic backlight control technology have become important development directions in the future. Price drives market penetration The effect of technology development on cost reduction is obvious, and the cost reduction makes the product price more competitive in the market. In the white LED LCD TV, the cost of the light source exceeds 1/3 of the whole machine, and the annual price of the white LED light source drops by at least 20%. This will inevitably lead to huge price reduction space and market popularity in the future. The cost of LED backlight modules has dropped more than traditional CCFL backlight modules. Taking a 40-inch LED-backlit LCD TV as an example, the average cost of the LED backlight module is $118 in the first quarter of this year, and will drop to $100 by the fourth quarter. Research shows that the cost price of 40-inch LCD TV LED backlight module will drop to 100 US dollars in the fourth quarter, and the price gap between CCFL backlight module will be reduced from 3.7 times in early 2009 to 2.8 times. Panel makers and TV brand manufacturers are working on low-cost LED backlight modules. This also contributed to the rapid expansion of the market share of LED backlights. In 2010, LED backlight modules will account for 42% of the total large-size LCD panel market. In 2012, the market penetration of LED backlights will reach 67%. As seen from various market segments, the LED backlight penetration rate of the notebook market is the highest, reaching 61% in 2009 and 84% in 2010. It is expected that notebook computers will stop using CCFL as a backlight in 2012. Liquid crystal displays are more affected by price factors, and the speed of applying LED backlights will be slower. However, in 2009, Taiwanese manufacturers still began to use LEDs in liquid crystal displays. The penetration rate is expected to increase to 16.8% in 2010. As for the LCD TV market, the penetration rate is expected to reach 20% in 2010. Where are traditional TV manufacturers going? Now, the color TV industry is facing the problem of industrial transformation. LED backlights let everyone see a little direction, and the integration of content providers of IPTV is also a question they are thinking about. However, the homogenization competition of color TV manufacturers on LED-backlit TV is still inevitable, and two methods are about to be staged: price and technology. Because the industry reshuffle and integration faced by Chinese color TV manufacturers are extremely realistic. For domestic TV manufacturers, the correlation between backlight, module and machine is very high. The whole machine must be cost competitive, and must have sufficient differentiated competitiveness. It must be matched with the backlight module to carry out differentiated design. How to complete the purchase of standardized modular products from the market to outperform foreign products. Domestic traditional TV manufacturers need to consider whether the extension of the upstream and downstream enterprises in the industry chain, whether they are extension, chip or package, can be defined and designed according to the same target product, and the products produced can surpass the foreign brands. In fact, China's LED companies have accumulated considerable accumulation in packaging, chip, epitaxy and even substrate materials, but they often do not know where the application market is, and they will start. If the industry chain can be integrated through the government or industry alliance, it is possible to catch up with foreign companies. China is a big country in CRT. It has formed a complete industrial chain in the CRT era. Now it has entered the LCD era. In the past two years, Hisense and Konka have launched LED TVs, but the light sources used are either purchased or not mass-produced. This brand of products, domestic color TV companies have also prepared for the transition to LED technology. The distance to form a complete industrial chain will take less time than the CRT era. This is an opportunity for an industrial upgrade. With the advent of the May 1st Golden Week price war, in addition to high-profile new products, the major TV brands are paying more attention to price. Perhaps high-level decision-makers are more concerned with the concept of innovation and the integration of new strategic industries! latest news: On May 18th, the website of the National Development and Reform Commission announced the "Notice on Continued Organization and Implementation of the Strategic Transformation Industrialization of Color TV Industry in 2010". The National Development and Reform Commission will continue to organize the implementation of the specialization of industrialization of color TV industry strategic transformation this year, and encourage supporting materials enterprises to display according to the flat panel. The backbone enterprises need to develop and produce key supporting materials. In the latest document, the National Development and Reform Commission clearly proposed to promote the strategic transformation of China's color TV industry and promote the development of the flat panel display industry. Domestic color TV companies are spreading an investment impulse to get involved in the upstream of the LED industry.
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