Broadcast: the LED back light enterprise survival state

In the LCD industry chain gradually development and mature, LED back light industry labor-intensive characteristics and relatively low barriers to entry, causing the backlight industry is in a state of competition is fierce.On the one hand, the upstream key materials such as optical thin film is still in the hands of a few manufacturers, material price to drop, the product cost is high;On the other hand, also faces the downstream customers constantly under intense pressure to cut prices.Under the great pressure at the ends of the industrial chain, back light module product profit space more and more small, some vendors especially the management of peripheral manufacturers and live more and more difficult.How to improve product competitiveness, technology innovation has become the LED back light enterprise a matter of life and death.
Edge-lit and straight down type
With the LED prices have fallen sharply, by reducing the use of the LED number to reduce the cost of driving force is waning.
In the next few years, LED back light in the mobile terminal and the application of the market such as TV will continue to increase.Boe optoelectronics technology co., LTD. Display lighting division general manager Hou Yan said that so far, in the notebook market, traditional CCFL back light almost entirely replaced by LED back light;In the large size desktop monitors and TV market, LED back light is expected to be fully replace the CCFL back light this year.
As early as in 2005, Sony and Sharp introduced RGB type straight down type LED LCD TV, but due to the high cost of failed to accepted by consumers.In 2008, samsung has developed based on the side of the white LED light type liquid crystal TV, cost is greatly reduced, succeeded, and began to lead the development trend in the LCD TV.In 2012, and the development of Enplas TV lens makes the straight down type backlight LED consumption greatly reduced, cost is lower than edge-lit backlit, straight down type LCD TV for freshmen.PeiXiaoMing shenzhen refond optoelectronics co., LTD., vice President, edge-lit LED backlight module in is located in the side of the backlight module, light guide plate from the LCD screen surface, and straight down type backlight module in the LED is located in the bottom of the backlight module, through the lens of the secondary to the LED light Angle, thus reducing the amount of leds.
"It should be said that the two ways have their own advantages and disadvantages."Suzhou dongshan precision manufacturing co., LTD., vice President of the institute, director of the institute, backlit Li Xiufu said, "edge-lit module machine good compatibility, high reliability, straight down type module machine good strength, support large size; edge-lit all-in-one easier to achieve thin and narrow bezel design, assembly, is more simple, straight down type machine has a price advantage."
Then the two technical route of mainstream companies in efforts in the direction of what?PeiXiaoMing said, as the edge-lit backlight module into the changes in the way of light, the brightness of LED, power and cooling capability are put forward higher requirements, tend to be more standardized, edge-lit LED encapsulation and power showed a trend of increase, the products of the same size package LED stent material performance and the structure performance are improved.
And straight down type backlight technology in the low light, low cost direction at the same time, improve LED power from 1 w to 3 w, scaffold material is developed from PCT to EMC, light to electric light source, shiny surface diameter decreases continuously, from suits to flip chip flip chip also improve the cooling capacity of the LED.
"TV backlight design usually need to make a trade-off between cost and thickness and brightness and also each have advantages and disadvantages of various technical route."Hou Yan said, "but specific to the light way, to be sure, with the LED prices have fallen sharply, by reducing the use of the LED number to reduce the cost of driving force is waning."
Cope with the challenge of OLED and LED display
Through technical innovation to promote sustained cost reduction, thus win the market with high cost performance space.
Although there are still a lot of their respective defects, but can be spontaneous light OLED and the emergence of LED display, or for the LED backlight module industry has brought great impact.And not only is illuminated that advantage, high color gamut, high contrast, wide Angle and flexible OLED screen, large LED screen size make the LED backlight module, enterprises are treading on thin ice.
How to deal with challenges of OLED and LED display?The index of mainstream companies to seize the color gamut.Color gamut, or color saturation, is the ability to display restore the natural color, image more bright-coloured, display color gamut, the higher the more close to natural true color.Generally the color gamut of the liquid crystal display is about 72%, and OLED color gamut can reach above 100%.
That how to improve the LED back light liquid crystal display color gamut?PeiXiaoMing said, one is to use the new narrow half wave wide combination of red, green, pink, color gamut of about 85%;Second, add green chip compensation, color gamut can reach more than 95%;Three is the scheme of quantum dot fluorescent powder can achieve more than 100% of the color gamut.
Way is to have, but all have their own limitations.Qingdao hisense electric appliance co., LTD. Technical director Qiao Mingsheng said that the first scheme is relatively simple to implement, and relatively low cost, but also can realize the color gamut of value is relatively low;The second double color chip solution can realize value is relatively high color gamut, but complex, dual chip life inconsistent;A third type of quantum dots technical scheme can achieve high value of the color gamut, but is also high to the requirement of packaging materials, temporarily can't meet the requirements of environmental protection.
"Improve the color domain is one of the direction of our efforts, and ultra-thin fuselage, ultra narrow frame, high brightness, low power consumption, surface are LED back light liquid crystal display technology such as the challenge of new technology measures. Final purpose or through technology innovation to promote sustained cost reduction, win the market with high cost performance space."For the direction of the backlight technology, several experts reached a consensus.