LED display industry first started in 1987, before and after, after nearly 20 years of joint development, is now a considerable scale. At present, LED display of the growing number of manufacturers, including some of the best business they co-prosperity of the emerging high-tech industries, and to the world's manufacturing center LED screen transfer to China. The 21st century is an era of flat panel display, LED display, as the mainstream flat panel display products, will also have greater prospects.
Full-color rapidly growing popularity and promotion

LED display is a computer-technology, information technology, electronics, optics and color combination of high and new technology such as electronic monitors. LED displays are divided into monochrome screen, two-color screen and full-color screen. The so-called monochrome screen, as its name implies, the display is a single color LED components. The red and green LED display, as a pixel color screen name or color screen. The red, green and blue LED of the three together as a pixel-called tri-color display screen or full-color screen.

Accompanied by a green light continuously upgrade the chip, declining prices, is a full-color at an unprecedented rate in the promotion and popularization. In particular the Beijing "Green Olympics" to the call, full-color LED makes the market more attractive.

LED full-color screen is divided into indoor (Indoor) and outdoor screen (Outdoor). The LED drive There are two kinds of changes is the LED current. In general, LED current of 20mA best set in the following order to ensure that anti-decay of the LED. Another is the use of the human eye's visual inertia with pulse modulation to achieve control of gray. On the average pixel brightness can be determined by the feeling that it's bad / out (duty cycle), which periodically change the duty cycle, as long as the cycle short enough, the human eye can not feel it's bad / out.

Screen at the indoor pitch (Pitch) for the 2mm-12mm, which 2mm-8mm indoor screens in general the use of the patch-TOP now or developed in the way sub-paste form. Outdoor screen at the pitch (Pitch) for the 10mm-40mm, so as to present a green LED brightness level, Pitch for the 20mm screen is one of the most mainstream of products.


Domestic manufacturers to display, after more than a decade of development, progress very quickly, but Europe and the United States and Japan and other developed countries, there is still a considerable gap, in particular, is one of the most important pieces of LED displays and packaging technology The level of design, there are still shortcomings.

Process control package is important

Full-color LED display with the technology package has its own characteristics. First of all we do is control of raw materials because of the use of outdoor full-color environment, rather than long-term high temperature is a long-term work at low temperatures, rain and long-term corrosion, such as the LED is not a very good reliability, Are prone to blind spots, so we very much attention to the quality control of raw materials. Lehman has a set of optical materials, advanced inspection equipment, can help us strict control over raw materials. Our full-color LED products, the use of high thermal conductivity, electrical conductivity properties of high-quality copper stent, which can greatly reduce the thermal resistance of the LED. In addition, we support the special coating also made provisions to ensure that our quality requirements. In order to improve the brightness of the finished product, we also made an Yaguang stent Bowl Cup to deal with. In the choice of epoxy resin, we screen for the characteristics of the work, in particular the choice of resistance to UV (ultraviolet) high Tg (glass transition temperature) glue. In the baking process, we are using the cold ease relieving hot baking process, the baking process, as we have a large number of experiments, the glue can increase the Tg, but the most critical is that it can effectively reduce the glue in Stress, which greatly improved the reliability of the product.

Packaging plant for the production volume for each product chip should be strictly controlled and screened. According to our customer's specific needs, precisely what we need to calculate the chip's specifications. Especially for the production of full-color displays used in products, we are particularly strict control of the chip, not just to meet customer requirements brightness enough, we have to stand on the customer's point of view, really to attend to their white balance Regulation of the difficulties encountered. Apart from meeting customer requirements and the wavelength of light requirements, details of special attention to, if not pay attention to details, display manufacturers to tune white balance, as a result of the LED brightness and wavelength is not normal, with adjustments for the special non - Easy.

Attention should be paid to LED optical design

LED is a very sophisticated optical systems, cup bowl, and the chip with the lens to be very well be a good optical design. Most of the original packaging plant did not attach great importance to this point, and this is our display technology can not keep up with developed countries such as Europe and the United States a very important reason. We have a lot of analysis and found that red-chip and two-pad very green, blue chip, chip in the material, the structure of the layer thickness, refractive index, as well as they die of the spot has a lot of difference, and their physical Size is also a similar amount, in order to make the R / G / B (red-green-blue) of the three colors of the LED brightness changes in the 90 or so within the framework of maintaining a high degree of consensus, to use a different optical lens. The Company has developed into force in two oval optical lens (mode), a specialized chip for the red and the other for a piece of green, blue-specific. So that we successfully resolved this problem for years.

We hope that with the LED display enterprises work together to improve China's LED display for the overall skill level and work together to allow China to become a manufacturing power LED display.