At present, there are many new backlighting research and development, the Japanese company has successfully developed a carbon nanotube field emission type high-brightness backlight for LCDW (widescreen LCD) and other large-screen display. In addition to high luminous efficiency, low power consumption and high brightness light, it also has mercury, long life and high speed response and so on.
1, LED display thin, high power
According to the current market observation, 20CM thick class box so far the global LED display is still a large possession. LED display applications more and more widely, there are more and more security risks, LED display thin, high power has become the pursuit of most well-known manufacturers.
LED display is not only the thickness of the main competition, but also includes more economical, energy-saving power consumption, more excellent picture quality. Many aspects of the technical performance advantage is the LED display thin, high-power market, the core reason for rapid growth. Recently, Tong Pu introduced similar products, the thickness of about 1cm, this thickness is the traditional LED display can not match.
2, LED display large screen splicing
Mosaic wall is an integrated system, there are four types, more commonly used is the projection and LED two. Among them, the projection is currently used to 3LCD, DPL and LCOS. The use of projection technology, the price is relatively low, and the screen quality and stability are relatively high, so the most cost-effective, is the mainstream of the field of splicing wall products. LED mosaic wall although the price is relatively high, but because of its tolerance to the sun and wind and rain characteristics, is widely used for outdoor digital display.
3, side-emitting dynamic backlight and low-power technology
Now large-scale production of large-scale TV products, are used directly under the CCFL as a light source, this drive requires Invertor (anti-converter) technology, due to power problems, the use of CCFL as a light source power consumption is relatively large, with the technical Continue to improve, this technology to achieve the power consumption has been close to the limit. High-end products directly under the launch of LED backlight, reduce the power consumption of a step on the technology, with the emergence of high-power LED and the efficiency of the direct power consumption is declining. Direct-type LED backlight there is a breakthrough technology, localdimming (regional control) is the dynamic backlight technology, a large extent to reduce the backlight power consumption, improve the TV product contrast, but requires the number of LED More, TV products, the thickness of relatively large, beautiful and less flexible. The late launch of the side-emitting LED large-size backlight technology, a collection of ultra-thin, beautiful, low power advantage. It is expected to use localdimming technology on the side-emitting LED large-size backlight, which can greatly reduce the power consumption of the backlight. Direct-type LED dynamic backlight combined with the image processing, dark local LED to reduce the current or voltage, so the driver circuit technology requirements are relatively high, but greatly reduce the backlight power consumption. While the side into the LED backlight through the LED cross control, to achieve regional control, to a certain extent reduce power consumption. Side-mounted LED large-size backlight combined with the various advantages, if the breakthrough on the localdimming, will be another technology to improve.
4, LED package to consider the direct package of cooling materials
Now the development and design of large-size LED backlight products, to be faced with an important issue is the cooling problem. Direct LED large-size backlight, a certain amount of mixed light height, the heat will have some help, and in the entire LED board will be the corresponding to do the cooling plate, to achieve cooling effect. As the power of LED lights is relatively high, and there is a certain amount of energy in the form of heat release, and the backlight on the thermal reliability requirements of more stringent, overheating the performance of circuit components, reduce the luminous efficiency of LED lights, film wrinkles The phenomenon caused by the backlight mura (uneven, there are spots) bad, the local temperature of the backlight overheating, aging test in the module when the LCD production instability. And now the development of mass production of large-size LED side of the light-emitting backlight, requiring a reduction in the number of light, the power of the lamp to increase the cooling requirements of the LED light bar higher. Now the technology is the use of aluminum light board, light bar in the assembly to the backlight on the need for heat sink, the structure should be better with the heat, but later with the reduction of the light, the corresponding number of lights to reduce the brightness of the lamp, On the existing technology is a challenge. Late trend focused on the luminous efficiency of the LED, the higher the luminous efficiency, the lower the heat generated. From the LED light packaging technology to consider, directly to the cooling material package to the inside, to achieve better cooling effect, with the packaging technology to improve, LED lamp cooling will be better. And now all LED manufacturers are studying the LED light module, the technology is a number of chips packaged in a module, and the corresponding heat treatment, mixing in the Lightbar module to achieve the best condition, and the use of ceramic packaging better Cooling, power to 100lm / W to the direction of development.