Backlight demand, South Korean manufacturers into LED chip production

South Korean companies use LED backlight to actively promote the development of thin LCD TV, the Samsung booth showcased the edge light type LED backlight 3.9mm thick "world's thinnest" (the company) 40 inch panel.

In the United States and other places, the use of LED backlight LCD TV has been formed in the market, Samsung Electronics currently holds about 90% of the global LED backlight LCD TV market share.

In the same period held "FPD International 2009 Forum" seminar, Samsung Tae Seok Jang (LCD development team Department components solutions business vice president) forecast, LED backlight LCD TV market will achieve a leap forward development in the future, to 2009 3 million 700 thousand, 2010 30 million, 2011 68 million level, accounted for about 40% LCD TV market. In 2007, it was predicted that such television would account for 10% of the market in 2011.

With the development of LCD TV thin trend, LED backlight began to be fully adopted, sales gradually expanded. At present, in order to reduce the number of LED chips used in the LED backlight source, the use of the edge light type has an increasing trend, but there are some difficulties in the local dimming (Local Dimming).

In addition, the use of light guide plate must be used to realize the light of backlight. Its role is to be equipped with one end of the LED light evenly distributed throughout the backlight. In other words, reduce the number of LED chips need to add a light guide plate this part.

Straight down transition

Due to the difficulty of local dimming, light guide plate is expensive, so stakeholders predict: LED configuration directly below the screen backlight will become the mainstream in the future". Although the straight down type is not conducive to thin, but as described above can also achieve local dimming, thereby improving the quality of the LCD panel display image. Without the use of more expensive light guide plate and micro lens.

The transition to the straight down the premise that the LED chip price cuts. The edge of the light has been widely used, originally because of the need for a large number of straight down LED chip. If the output of the LED chip can go beyond the past, so that the chip unit price decline, then, compared with the use of light guide plate edge light type, the use of multiple diffusion plate straight down more conducive to lower prices.

LED chip low price dynamics has become increasingly evident. According to the South Korean University of the field of liquid crystal prediction, Samsung Electronics has begun to purchase MOCVD devices, the number may be more than 200 units". In this regard, Samsung insiders did not disclose details of the number, but there is no denying to mass production of LED chips: "on the MOCVD device, we are to enable the device to adjust the semiconductor technology personnel, ready to meet the 2 ~ 3 years after the market demand".

In addition, in February 2009, the United States Viiko precision instruments (Veeco Instruments) disclosed to the LG Innotek supply of high brightness LED manufacturing MOCVD device decision. About the number of purchases, the Korean University of the field of liquid crystal, said ".

Taiwan manufacturers, AU Optronics (AU Optronics AUO) as the company's LED manufacturer lextar Electronics (Lextar) purchased MOCVD device. AUO in 2008 SID keynote speech has also announced that: in the year before the notebook backlight will all be replaced by LED".

But even if the LED chip price, straight down backlight still exists. The increase in the number of LED chips will change the mounting floor and structure, resulting in an increase in weight and thickness. Even if the realization of thin and energy saving, increase the weight of the product is also difficult to ensure easy to wall". Moreover, the thin edge of the edge of the difficulty is also one of the problems.

To solve the above problems, compared with the way that the LED package is installed on the printed board, COB (chip on board) is more effective when the LED chip is directly installed on the printed board. COB can be configured with a large number of small LED chip, so that a single LED light-emitting closer to the surface of the light, help to achieve a thin backlight. At this stage, this approach is estimated to be the object of the company.

Synergistic effect of LED and LED for lighting in backlight

In addition, the above mentioned LED manufacturers and panel manufacturers to purchase a large number of MOCVD devices is not simply to increase the output of LED chips with backlight. It also shows great expectations for the expansion of the LED lighting market.

Now, the global lighting market size of about 7 trillion yen. Nomura Institute of Maehara Takaaki in the Green Device 2009 Seminar, as of 2009, LED lighting market size of about 150 billion yen, the next 3 years will increase to about 500 billion yen.

Although the backlight for LED for lighting and manufacturing method of LED is not the same, but it can be said that South Korean companies are still trying to face backlight on lighting LED LED with the development of high brightness technology application, and expect it to play a synergistic effect.