LCD TV future trends LED will replace CCFL

Since 2008, LED backlight gradually entered into the industry, expanding market share. From the beginning of the notebook computer, and now applied to monitors, LCD TV, LED backlight products continue to emerge, increasing market share.

Compared with CCFL backlight, LED backlight has many advantages, especially in the aspect of environmental protection has important significance, therefore, reduce the cost, with the expansion of the market, great influence on the development of industry of LED backlight CCFL backlight, CCFL may eventually replaced by the LED out of the market.

3M (Chinese) optical big screen business development manager Du Guanglei said in an China "electronic newspaper" interview with reporters, the maturity of LED technology and popularization will become the driving force of the new LCD industry growth. From a consumer perspective will create a new selling point and application of liquid crystal display, thereby stimulating consumer demand; from the producer level and LED will promote technological upgrading and industrial transformation, and then continue to attract talent and capital investment.

Compared LED and cold cathode fluorescent lamp, advantage in many aspects. The first is the energy efficiency, the efficiency of the cold cathode lamp tube is about 60lm/W, and the current commercial LED efficiency has reached two times the value of the sample in the laboratory can be doubled. Secondly, LED will bring great changes in the mechanical design of the backlight. Because LED has small volume and light direction, can greatly reduce the traditional backlight light guide plate thickness, even without the light guide plate.

In addition, cold cathode fluorescent lamp of mercury is a substance of high cost and great harm to the environment. From an environmental point of view, LED gradually replace the cold cathode lamp will also be an inevitable result.

The application of LED may bring disruptive changes in backlight. As early as 5 years ago, 3M began to use the company's core technology platform, the development of LED can give full play to the characteristics of optical and mechanical systems. LED to the LCD display is just beginning to change, then we will wait and see. "Blocking optitek said.

LED backlight is still inadequate

Although LED backlight has obvious advantages, but there are still need to be improved. LED manufacturing and packaging technology, especially large size backlight CCFL is not mature enough, the performance of LED manufacturers in the backlight for the technical requirements of LED is not very clear. From the packaging point of view, and now LED packaging is more suitable for lighting, but not to adapt to the requirements of the backlight source of light mixing distance. Commercialization of LED still exist luminous efficiency is not high, the color gamut and the contradiction between light efficiency, we must make a breakthrough, while the price of LED is also higher.

CCFL backlight has been in the leading position of the backlight source. From the medium size display products such as notebooks, monitors, to large size products such as LCD TV, CCFL backlight has been the largest share of backlight products. At present, in the large backlight, CCFL backlight because of its low cost and mature technology, occupy most of the market. At the same time, the major manufacturers have also added a new technology in the CCFL backlight, add vitality to it, such as scanning backlight, dynamic backlight, etc.. With the addition of new technology, the quality of liquid crystal display is improved and the power consumption is reduced.

The general manager of Anhui Wenrun photoelectric Co., Chen Hesheng also believes that the large-size backlight current mainstream technologies and products is still CCFL. LED application in the light efficiency, cost, heat and other aspects of the promotion of obstacles.

Although optimistic about the prospects for the development of LED backlight, but LED light source technology at this stage is not perfect. Including cost, light efficiency, brightness uniformity control and other technical problems need to be improved. LED is a point light source, different from the line source CCFL. Applied to the backlight LED, need to pay particular attention to the processing of optical uniformity. In order to emphasize the uniformity of light, each LED luminous brightness characteristics, in the selection also requires consistency. In addition, if there is a life of LED in the end, it will affect the light uniformity, so we must ensure that all LED have long life. Such a strict selection, so that the cost of rising LED backlight.

But good development potential of LED technology makes the industry managed to spare no effort to overcome these problems. With the continuous improvement of LED light source technology, there are more and more liquid crystal display products using LED technology.

LED prospects

Chinese Electronic Chamber of commerce consumer electronic products research investigation office, the latest data show that: at present, consumers for LED LCD TV products, attention has been as high as 75%, ranking first. Especially recently, LGD launched a strong "240HZ straight type LED backlight technology, is to inject a booster for LED LCD TV industry, that consumers in droves. Then, LED LCD TV in the end have sophisticated and what kind of charm, can obtain such strong momentum? According to the PRC in 22 provinces consumer survey data show that more than 70% of consumers choose LED LCD TV is that it looks stylish, lightweight, more in line with the modern Home Furnishing style. Indeed, the ultra-thin appearance of LED LCD TV challenge people's understanding of the thin limit, fully meet the consumer demand for personalized products. For example, the newly launched LG LED LCD TV the thinnest place is only 24.8mm, and the traditional LCD TV is difficult to achieve because of the technology is difficult to achieve such a slim design. In addition to the appearance of thin, LED backlit LCD TV in the performance of the screen has also been a qualitative leap. In particular, the company's flagship star LGDisplay products straight down LED liquid