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From the chip, packaging, application of three levels of interpretation of LED lighting technology

May 07, 2017

In the LED lighting technology continues to develop and the community increasingly concerned about the energy crisis today, LED lighting industry usher in a comprehensive outbreak period, attracting a large number of funds and business influx, which lighting market competition is also increasingly fierce.

If the development of LED lighting technology from the point of view, one is the chip level, one is the packaging level, one is the application level. Chip level is mainly concerned with the LED manufacturing technology; packaging level is mainly how to convert the LED chip can be used to illuminate the lamp or light source; LED application level technology development is relatively complex, including the development of electronic control technology, new materials Development and use of environmental lighting quality evaluation technology development and improvement.

Chip level

Has been the pursuit of high luminous efficiency for the development of LED chip technology power. Flip-down technology is one of the main technologies currently available for high-power high-power LED chips. Sapphire in substrate materials and laser substrate peeling technology (LLO) with new vertical structure technology will continue for a long time Dominate.

But in the near future, the use of metal semiconductor structure, improve ohmic contact, improve the crystal quality, improve the electron mobility and electrical injection efficiency, while the surface through the LED chip coarsening and photonic crystal, high reflectivity mirror, transparent electrode to improve the extraction of light Efficiency, then the total efficiency of white LED can reach 52%.

With the improvement of LED luminous efficiency, on the one hand the chip is getting smaller and smaller, in a certain size of the epitaxial chip can cut the number of chips more and more, thereby reducing the cost of a single chip, on the other hand, the greater the power of a single chip , Such as now is 3W, the future will go to 5W, 10W development. This has the power requirements of the lighting application can reduce the number of chips used to reduce the cost of application systems.

In short, flip-chip, high voltage, silicon-based gallium nitride will continue to be the direction of development of semiconductor lighting chips.

Encapsulation level

Chip-level packaging, LED filament packaging, high color rendering index and wide color gamut will be the future development trend of packaging technology. The use of transparent conductive film, surface roughening technology, DBR reflector technology to enhance the LED light bead light effect package is still the mainstream technology; at the same time flip-chip structure COB / COF technology is also the focus of packaging manufacturers focus on integrated package light engine Will be the focus of research and development next season.

To power supply solutions (high voltage LED), COB / COF application of the popularity: driven by cost factors, to power solutions gradually become acceptable products, and high-voltage LED fully meet the power supply program, but it needs to solve the chip reliability The With low thermal resistance, light type, free welding and low cost advantages, COB applications in the future will be widely popular.

In addition, the power will become the mainstream package, the current market products are mostly high-power LED products or low-power LED products, although they have advantages, but also can not overcome the defects, combined with the advantages of both the power LED products came into being.

There is also the application of new materials in the package. High temperature, anti-UV and low water absorption and other higher environmental tolerance of materials, such as thermosetting materials EMC, thermoplastic PCT, modified PPA and ceramic-like plastic, etc. will be widely used.

For the demand for light quality, for indoor lighting, LED color rendering index CRI to 80 as the standard to 90 + as the goal, as far as possible so that the light color of the product close to the Planck curve, so as to improve the light quality of LED, Lighting will also be more concerned about the quality of light.

By optimizing the LED packaging technology, light efficiency to further improve, has more than 200lm / W, much higher than other large-scale use of traditional light source. LED lamp beads cooling performance will be further improved, further improve the reliability, lamp beads life will be further extended, so as to further improve the color quality, the final human eye comfort to further improve.

LED application development level

At present, the application manufacturers mainly through the use of new cooling materials, advanced optical design and application of new optical materials and other means to achieve LED lighting products, cost optimization, and to ensure product performance.

But in the future, LED lighting application manufacturers will focus on these points:

1, based on the application of the scene requirements of interchangeable LED light engine technology;

2, based on the Internet of things platform LED intelligent lighting system architecture technology;

3, based on the reliability of the design of LED lighting development, the use of the cycle to maintain color / brightness consistency of high-performance LED lighting development;

4, based on a large area of high efficiency diffusion diffusion plate technology development;

5, the online light environment experience the lighting system to solve the technology and service system;

6, LED light source rich color characteristics, which makes the scene lighting will also be the core competitiveness of LED lighting.

Traditional lighting fixtures are designed around the shape of the light source, and are dimensioned.

  The LED lighting features are:

Lamp shape freedom, appearance creativity;

Lamp size is free, the size of flexible;

Lighting light free, on demand lighting;

Lamps free spectrum, light color Smart;

Lamps are free and free to install.

The future shape of LED lamps will no longer be limited to the shape of traditional lamps, and tend to shape the freedom and hidden. Shape freedom on the one hand to meet the individual needs, on the other hand can be decorated as decorations; and LED hidden will be embedded in the form of lighting fixtures hidden but everywhere.

At the same time LED lighting products to achieve light lumen control, no longer limited to a certain area in a fixed fixed wattage, which will be a great technological progress.

Intelligent lighting: future development trend

Intelligent lighting refers to the use of intelligent client information collection, processing and control, through the lighting brightness adjustment, lighting switch distribution control, spectral adjustment control, scene settings and other functions, to achieve safety, energy saving, health, comfort and so on.

Intelligent lighting technology features include distributed, remote telemetry, open, compatible, interactive and so on.

To achieve intelligent lighting, you need to have the client intelligent operation technology and data acquisition technology, Internet data transmission technology, cloud large data management and analysis technology, customer experience online lighting technology, only to these technologies as the basis, in order to truly intelligent lighting.

The future of intelligent lighting requirements is personalized display, simple control, emotional induction.

Home lighting because of its lighting needs are more simple, easier to control, so smart LED lighting will start from here. But with the development of technology, the future even in public places, also need a good lighting system, such as outdoor landscape lighting on the intelligent demand is very high, but the technology is difficult to meet the demand.

How to break through outdoor lighting, commercial lighting and other public places intelligent lighting technology bottlenecks, price barriers have become a problem to be solved.

Intelligent is the inevitable trend of future life. LED lighting is just a variety of intelligent home appliances a small part of the enterprise must be through technology research and development so that lamps become intelligent and diverse to meet the individual needs of customers. But the current intelligent lighting technology due to high cost, poor product matching and other issues, resulting in LED intelligent lighting products can not be universal.

With the technical improvements, product performance tends to be stable, the cost is reduced, intelligent LED lighting will certainly be widely circulated in the market. LED companies have mastered the intelligent lighting technology, and designed to meet market demand for products and intelligent control system, to a large extent determines the long-term development of the enterprise.

From the use of the scene, the scene is different, lighting demand is not the same. LED indoor lighting as LED lighting "a torrent", its development through three main stages:

First, improve product performance.

At this stage LED companies focus on improving product performance, to ensure that the LED product lighting quality, such as improving the LED light source, MR16 lamp cup and LED module and other products performance;

Second, optimize the cost.

At this stage, enterprises should try to shorten the product recovery cycle, increase their product capacity, by enhancing product development technology, to produce customers to accept the cost-effective products;

Third, to guide the digital light.

The quality of indoor lighting has three important indicators: physical indicators, physiological indicators and psychological indicators. Different lighting environment will affect the consumer's heartbeat, blood pressure and other physiological indicators, thus affecting the psychological comfort of consumers. In lighting applications, physiological indicators and psychological indicators are more important.

The future of indoor lighting will not be too concerned about the light effect, but will pay more attention to the quality of light, more concerned about the customer's emotional experience, through the perception of light to create a pleasant environment, there are different viewing direction of the lamp color. LED products themselves color and color drift, strobe will affect the indoor lighting effect.

The current domestic LED lighting application technology is more decentralized, homogeneous products, inferior products are full of LED lighting market, resulting in market chaos, competition disorder. Many domestic LED companies are in the learning stage, rather than independent innovation. Many small and medium enterprises focus on short-term interests, on the other hand there is no sufficient resources, time into product development, resulting in LED products mixed. The international lighting business LED product quality, performance, especially in optical design, product intelligence control and so are better than domestic products.

For this situation, small LED enterprises in the early stages, through the purchase of industry associations of technology, or through the development of enterprise marketing strength of enterprises.

Enterprises to reach the medium-sized stage, you need to change the development strategy, through in-depth research on the market, a clear LED lighting products in the future development trend, and actively invest a lot of resources to enhance research and development strength, and the crowd competing LED lighting market.

LED lighting industry will continue to integrate resources, LED lighting companies at the helm to have a keen market insight, increase investment to enhance product research and development capabilities, the accumulation of core competitiveness in order to compete in the future in an invincible position.



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