The SMD Screen technology for lighting is at an era of rapid growth and its luminous efficiency is constantly improving. The output of luminous flux from an individual LED package fixture increases by two years. Since the 1980s the introduction of surface-mount equipment to boost LED production has been slowly encouraged. The technology was develope further in the 1990s. The first SMD LEDs were utilize for low-power devices for indicating equipment as well as keys for mobile phones.
Lighting, the latest developed high-power SMD LEDs are use in automotive lighting panel’s brake lights, and extends to other lighting equipment. Due to the fact that SMD LED devices are on the chip side upstream rather than the downstream side of SMD Screen product lines, they can have plenty of potential for improvement in brightness and cost reduction. Moreover, there is more need on the downstream aspect, specifically with regard to LED lighting. The application possibilities are greater. This means it has a huge potential for developing markets.
SMD Screen market status:
In terms of globalization the production of packaging in China Taiwan accounts for 60 percent of the global portion. The major companies are Everlight, Lite-On, Guanglei, Baihong, Hongqi, etc. The distribution of labor within the middle, upstream and downstream industries is evident and marketing and supply of the chain of industry is stable, particularly in packaging. Once the manufacturing process is move to mainland China manufacturing, the cost of production will be competitive. It is anticipate that within the next 5-10 years it will be the Pearl River Delta, Yangtze River Delta, Fujian and other regions will emerge as the largest LED packaging facilities in the world.
From the point of view from the Chinese mainland market:
The first is mostly comprised of companies from United States, Japan, South Korea and Taiwan. Even though foreign-owned companies hold the majority of market share, since SMD LEDs from a variety of prominent companies started production in 2000 Local Chinese suppliers have seen a rapid growth. In the present, the market includes between 20 and 30 suppliers, the majority of them are locate within Shenzhen, Dongguan, and Guangzhou along with Fushun in Guangdong while others are to the east in Jiangsu, Zhejiang, and Fujian.
SMD Screen characteristics for encapsulation:
SMD LED encapsulation procedure involves first setting the epoxy resin and phosphor to form a mold then mold the epoxy resin and Phosphor powder into a glue cake and then stick the cake on the chip. and then filled with epoxy resin to create SMD LED packaging.
The most commonly used SMD LED that has the external dimensions that is 50mm by 50mm on the market comes by three chips and six pins extend that screwed on to on the board’s surface. Because it is directly connected directly to the top of the heat sink using thermal conductive glue, heat dissipation efficiency is significantly improved as well as the reliability enhanced, and light decay can be reduce. For LEDs with high power metal-ceramic composite substrates with excellent thermal conductivity will be typically utilized. The primary characteristics are:
(1) The highest thermal conductivity, as well as low resistance
(2) Coincidence coefficients of thermal expansion (ECT: 6.2);
(4) Resistance to corrosion and non-yellowing
(5) Follow Rohs regulations
(6) Resistance to temperatures up to a certain point.
Thermal resistance in LED encapsulation is a major impact on the life span of the chip particularly for the high-current powered LED chips. The price and the heat dissipation efficiency of LED Encapsulation products are dependent on the design of packaging supports and the support for packaging is evolving with a focus on small dimensions, thin thickness and excellent heat dissipation.
The issue of heat dissipation must be considere when packing multiple LED chips into one SMD LED. One of the main advantages of high-power SMD LEDs made of the highest thermal conductivity of metal ceramic composites is their ultra-low thermal resistance. The extremely low thermal resistance and high power LED chip packages are better suited for applications with limited space because of its compact dimensions and its small size. This feature is a huge benefit for many applications.
Comparatively against the other LED chips, if you keep the same temperature at junction you can reduce the requirement for heat dissipation parts. If the same components for heat dissipation are employee to maintain the same junction temperature, the temperature of the junction is reduce and the lifespan of the LED chip is prolonge.
Comparison of DIP and SMD Screen:
SMD Screen are attach directly to the top of the circuit board. It is ideal for SMT processing and soldering reflow. SMD LEDs address the issues of brightness and viewing angle flatness, reliability, and the consistency. In comparison to other devices packaged SMD LEDs have the advantages of high vibration resistance and a low defect rate in solder joints and excellent high-frequency characteristics. It houses larger LED chips within a smaller size it uses lighter PCBs as well as reflective layer material, which is a clear indication it is the case that the reflective coating requires fill with less epoxy and also reduces the size by removing the heavy carbon steel pins. The app can cut the weight of the item by half. The volume and weight is just 1/10 of traditional components for plug-ins. After the chip packaging is use, the amount of electronic components can be reduce by 40 to 60 percent, while the weight is decrease by 60 to around 80%. In the end, the app becomes more efficient.
The online LED bundle uses flowerpots. The potting process begins by injecting resin that is liquid into the mold cavity of the LED before inserting the pressure to welded LED holder, putting it in the oven that allows the epoxy resin to set after which it is then separated it from its mold to make it. Because it is a relatively simple and low-cost manufacturing process it is able to capture a large market share.
With the rapid growth of the global economy, energy insecurity has become a worldwide issue that must be solve urgently. Lighting consumes around 20% of total energy use. The reduction of lighting power consumption is a great option to conserve energy. In lieu of traditional incandescent lamps LED lamps are speeding up the substitution of traditional sources of light. With the maturation of LED manufacturing technology. evolution of LED will be a brand new bright place for LED lighting sources. Its low speed requirements and better driving characteristics smaller volume and weight. Quicker reaction speed, better energy efficiency, long-lasting life environmentally friendly. And dramatically increasing the efficiency of luminous light sources, and so on.
Traditional light sources come with many advantages. Because of consumer demand and the advancement of technology and science. The continual improvement of the effectiveness of the light produced. By SMD LEDs and the enhancement of heat dissipation along with optical quality. As well as the rapid development of mounting on surfaces will be the primary. Focus of research in led technology.