LCD backlight Gexianshentong ultra-thin technology trends

With the advent of the international financial crisis, the LCD industry has also been volatile, as one of the important parts of the LCD backlight source also changes with the change of the industry. To shake off the impact of the financial crisis, out of the trough, there are new technologies, new products launched.

LED (light-emitting diode) backlight market share gradually increased. In notebooks, monitors and televisions and other products, the original has been in the use of CCFL backlight, from the beginning of 2008, the amount of use of the notebook and LED backlight display products continues to expand, the relevant statistics show that the first quarter of 2009, shipments of the LED backlight is 8 times higher than the same period in 2008.

In the CCFL dominate the field of LCD TV, with the launch of the first Hisense LED backlight TV, the domestic market LED backlight TV products have sprung up in the major stores. Samsung has launched a series of LED backlight TV products, with its slim slim figure attracted the attention of the majority of consumers.

Of course, CCFL did not completely withdraw from the stage of history. Because of its high cost advantage, or occupy a certain market share. Moreover, the major manufacturers are constantly adding new technologies for CCFL backlight, such as adding CCFL dynamic backlight technology, reduces the power consumption of LCD TV, improve the contrast, and the liquid crystal display tailing phenomenon has also been eased.

Backlight technology has its own characteristics

CCFL (cold cathode fluorescent lamp) backlight has been in the leading position of the backlight. 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. Its wide range of applications, mainly because of its low cost, mature technology. After adding the backlight technology, it has a significant effect on improving the quality of display screen and saving power.

But CCFL itself has some disadvantages that can not be ignored. First, it contains mercury, environmental pollution. Secondly, CCFL is driven by high pressure, will produce radiation. In addition, its drive control and not as flexible as LED.

2008, large and medium size LCD backlight market started with LED, its market share gradually increased. Due to the introduction of LED backlight, notebooks, monitors and TV thickness decreased, the thinnest TV thickness of less than 10mm. The use of dynamic backlight technology, the LCD screen color, contrast has a revolutionary change, and the power consumption has been significantly reduced.

LED backlight appears, because it has a very obvious advantage. The use of LED backlight, you can improve the color saturation, eliminate the trailing phenomenon, improve contrast, etc.. Moreover, LED is a solid light source, mercury free, is a green environmental protection products. The introduction of dynamic backlight technology, but also greatly improved the quality of liquid crystal display screen. LED backlight also has its own shortcomings, its heat, is the need for special consideration in the design. With the increase of working time, the color of LED is different, and new technology is needed to overcome it.

Compared to CCFL, FFL (planar fluorescent tube) backlight has many advantages. However, due to its price reduction speed is not fast, and FFL backlight belongs to the new technology, there is no mature CCFL, so its application is not particularly wide range of CCFL. FFL backlight has many advantages, mercury free, meet the requirements of environmental protection, long life, can be more than 100 thousand hours; working range, simple assembly; optical film material, can reduce the thickness of the backlight source. Because the electrode of FFL is located inside the glass, it is difficult to process, so the cost has not been greatly reduced compared with CCFL.

EEFL (external electrode fluorescent lamp) is the product of CCFL technology progress, as a large LCD TV backlight, is very promising, but it has been in the trial stage, its sales are much lower than CCFL. EEFL backlight can be used directly, so it is easy to use. Compared with the CCFL backlight, its production cost is lower. EEFL backlight has not been widely promoted, mainly its own still have some problems to be solved. The consistency and stability of EEFL products is not very good, and its high frequency drive power supply requirements, so there are a lot of products can not meet the use requirements.

Compared with CCFL, HCFL has many advantages in performance, but its use is limited due to the small number of suppliers. HCFL can achieve 3 times the brightness of the CCFL backlight, so you can reduce the number of lamps, thereby reducing costs. Moreover, the HCFL can also be used in the larger size of the TV, but also can be precisely adjusted to improve the contrast of the display screen. The diameter of HCFL is thicker, and its application has been affected by the trend of thin products. CHFL low life is also one aspect of its constraints.

CNT (carbon nanotube) backlight is currently in the early stage of research and development. CNT backlight has the advantages of high brightness, low cost, energy saving, light weight, simple manufacture, good environmental stability and so on. But the brightness uniformity and driving technology is not stable enough, the brightness uniformity can reach about 79%, while the general CCFL and LED backlight source brightness uniformity can reach more than 90%. The improvement of its driving technology can prolong its service life.

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 are also CCFL backlight