LEDs can be divided into plug-in LEDs (also known as LAMP series) and SMD LEDs (also known as SMD series) according to their package types. With the rapid development of the semiconductor industry and the continuous breakthrough of packaging technology, more and more SMD series products are available. Widely used especially in the field of lighting. From the High-tech LED Industry Research Institute (GLII) survey of Chinese LED indoor lighting, LED outdoor lighting, and other LED applications, it is found that indoor lighting and outdoor lighting have basically completed the comprehensive replacement of LAMP series light sources by SMD series light sources.
The current form of LED package devices is changing rapidly, from SMD to COB, from flip-chip to stepless packaging, which has injected a lot of new vitality into the development of the industry. As the favorite of the current packaging industry, the lamp 2835, the power covers 0.1W to 2W can be widely used in lamps, bulbs, PAR lamps, downlights, panel lights and mining lamps. With the development of the LED lighting market and the continuous improvement of customer requirements, LED products will continue to optimize and innovate, mainly reflected in the following points.
First, CSP package
In today's lighting market, everyone is competing to cut prices, and various packaged devices are constantly being forced to put on the promotion banner to quickly occupy the high ground of the LED lighting market. CSP packaging has taken the trend and largely solved the customer's requirements for product cost. The CSP package has the advantages of no substrate, no solder wire, small size and high optical density.
The true CSP package-free CSP can be directly applied to the customer's PCB board, effectively reducing the heat flow path from the heat source to the substrate and reducing the thermal resistance of the light source. The CSP package solder-free wire also solves the hidden dangers of the product failure caused by the customer's incompatibility of the bonding wire, further improving the reliability of the product. The smaller the size of the light source and the higher the optical density, the more difficult the secondary optical design.
In addition, since the CSP package removes the substrate/bracket and the gold wire, its cost is greatly reduced. Taking a 0.5W light source as an example, using a CSP package can reduce the cost of the product by 10%-20% on the existing basis. At present, CSP package Samsung has applied it to the field of TV backlights, and other LED manufacturers have also developed related products.
However, CSP packaging also has its own technical barriers, such as: CSP product size is small, mechanical strength is inherently insufficient, material sorting test process is difficult, SMT placement technology requirements are higher. Therefore, the application of CSP free packaging to luminaire manufacturers is a new topic, and many problems remain to be solved.
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Packaging process revolution roadmap .jpg)
Our low thermal resistance product distribution
Second, LED module - modular
Due to the increasing demand for the brightness of the lamp bead, a single high-power lamp bead can no longer meet the requirements. In order to meet the market demand, the application manufacturer adopts multiple lamp beads to improve the brightness, but this solution will cause excessive cost and increase the area, which is not conducive to production. Therefore, LED modules or integrated LEDs have emerged as the times require, and are gradually being marketed. Recognition.
The characteristics of the LED module are:
1. Standardization - Conducive to the promotion of LED lamps
At present, LED lamps are in various forms, which brings great inconvenience to the standardized production and promotion of indoor LED lamps. LED module standardization For new LED lamp manufacturers entering the market, they only need to find the standard LED modules on the market to design their own lamps, so there is no need to worry about mass production. Because the same standard LED module can be selected by many manufacturers at the same time, the standardized LED module products can also be conveniently mass-produced.
2, reduce the cost of LED lighting manufacturers
The traditional light source luminaire design only needs to involve optics and structure, but because there is no standard for LED luminaire products, the current LED lighting manufacturers need to be equipped with optical and structural professionals in addition to optical and structural professionals. Personnel has greatly increased the burden on LED lighting manufacturers. Moreover, this has created a high threshold for the newly entered LED lighting manufacturers, which is not conducive to the development of the entire LED industry. With the standardized LED module, the above problems are solved.
Since the LED module has considered the problems of electronics, electricity, primary heat dissipation and primary light distribution, LED lamp manufacturers only need to consider the structure of the lamp, secondary heat dissipation and secondary light distribution, thereby reducing the threshold of the LED lamp factory and reducing the threshold. The research and development costs of LED lighting fixtures. In addition, after the LED is modularized, the application manufacturer only needs to assemble the light source, which greatly improves the production efficiency of the lamp factory and shortens the production cycle of the lamp factory.
3. Improve the overall performance of LED lamps
Since the LED module clearly specifies the output lumens, color rendering index, system luminous efficiency, color temperature continuity and viewing angle width of different applications, and the specified parameters are up to the current high level in the industry, the application quality of the LED lamps is improved. There is a great improvement and effective protection.
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Our second generation LED module series (now mass production)
Third, a single light source - power
For the lighting market customers are concerned about LM / W and LM / ¥, that is, higher light efficiency, lower prices. Each package factory has its own magical powers, to meet the needs of the market with 18 kinds of martial arts, and to enhance the competitiveness of products. Since the development of LED has been effectively improved, the single light source can use a larger current, the power of the light source becomes larger, the amount of cost per watt will be less, and the cost to the customer will be reduced. Competitiveness will increase and market share will increase.
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Our 2835 series power schematic
In short, with the improvement of chip technology and the needs of the application market, the LED package volume will become smaller and thinner and thinner; the package power will be larger and larger, which is convenient for cost control, and provides a broader product design for the application plant. Design space. (This article is contributed by Hongli Optoelectronics)
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