LED two-dimensional light source and digital intelligent lighting

Ever since Edison invented incandescent light bulbs, humans have entered a new era of lighting. The incandescent lamp is a representative of the first generation of electric light source, and it emits light by heating the tungsten wire so that it is in a hot state. Its luminous efficiency is low and its service life is short. Fluorescent lamps represent a revolution in the history of electric light sources. At present, 70% of artificial light in the world comes from fluorescent lamps, but its color rendering is poor, and there are problems such as stroboscopic flashes and mercury contamination. What will be the new lighting source for the 21st century when entering the new century? With the continuous improvement of the semiconductor light-emitting diode (LED) chip technology level, coupled with the maturity of high-power LED packaging and application technology, LED light-emitting efficiency has been greatly improved, the current light efficiency of 1W white LED products has exceeded 40lm / W, All of this makes semiconductor lighting possible.

At the same time, economic development has brought about an improvement in the quality of life. People's demands for lighting have become higher and higher, and users' demands for lighting have also long gone out of the lighting area for lighting. In addition to energy saving, more and more people are still trying to use lighting to create a harmonious, quiet, warm living environment, so intelligent lighting came into being.

With the combination of semiconductor lighting and smart lighting, the new digital lighting will bring a new revolution to the human lighting concept and lighting culture.

Digital intelligent lighting - a new trend in lighting development Lighting design has long been based on the brightness, color rendering index and other physical quantities as the standard for design and evaluation of lighting effects. With the improvement of people’s material and spiritual living standards, “Smart Home” has gradually become a popular trend, and has become a standard of quality of life. Accordingly, the lighting environment should not only meet the requirements of the standard in terms of quantitative indicators. It is more desirable to work and live in a comfortable, flexible, personalized and artistically attractive lighting environment. Therefore, in the light environment design process, the human visual characteristics, comfort, architecture and lighting art, and energy saving must be taken into consideration. From the height of light culture, people-oriented, the integration of art and science, and finally obtain high-level, high-quality and high-efficiency lighting effects.

Lights are the masters of creating atmosphere. Whether it is the romance of the two worlds or the excitement of a collective party, the feeling of softness, warmth, relaxation and splendidness can be displayed in different lights. If you can adjust the room through digital lighting equipment The light changes can better match the user's various moods to set emotional lighting that belongs to a specific atmosphere. The dream of realizing the perfect combination of artistic lighting design and intelligent technology is how many people dream. Digital intelligent lighting has become an important part of smart homes. Experts predict that in the near future, smart lighting will replace general lighting and become the mainstream of the lighting industry. Problems with smart lighting systems using traditional lamps:

1. Intelligent lighting systems using traditional lamps and lanterns need a large number of lighting systems in order to achieve light effects in different scenarios. The cost is high and they cannot be integrated with building materials, and organic coordination with home furnishings is achieved.

2. The intelligent lighting system is frequently started and turned off, and the impact voltage damages the lamps, greatly shortening the service life of traditional lamps.

3, the existing intelligent lighting system, can only achieve regional lighting and time switch function, can not achieve dimming, color, scene control and other functions, there is a large distance from people's expectations.

Digital Intelligent Lighting - Opportunities and Challenges for Semiconductor Lighting Entering into General Lighting With the rapid development of semiconductor lighting technology, future semiconductor lighting applications will inevitably pursue luminous efficiency from the past, entering energy conservation, environmental protection, personalization, digitization, intelligence, and exquisite The age of The application of semiconductor lighting technology in special lighting, urban night lighting project, interior lighting and display engineering projects has given people new visual enjoyment: such as the performance of color, lighting control, environmental protection and energy saving. At the same time, it has obvious advantages over traditional neon lights, incandescent lamps, tungsten halogen lamps, and fluorescent lamps.

However, with the current cost level of LED, if you want to penetrate into the general lighting market, in addition to further reducing the price, you must give full play to the advantages of LED, seek breakthroughs in the field of high-end digital intelligent products, and can easily adjust Its state of color, brightness, color temperature, etc., get the lighting state that you think is most suitable, and the future semiconductor lighting source should be integrated with architecture.

In order to achieve the above goals, a semiconductor-based two-dimensional light source directly encapsulated on a metal-based circuit board is an effective solution.

Most of the high-power LEDs known to date are large size LED chips mounted on a heat sink embedded in an insulating frame made by a molding method. Optical lenses are fixed on the insulating frame. The LED chip is covered inside, in order to solve the heat dissipation problem, the heat sink is usually installed on a heat sink. In the manufacturing process, there are many parts used and the structure is complex. It is difficult to ensure the stability of product quality.

At present, the application of LED lamps still uses the traditional bulb type package to form a cluster type lamp board, but due to the poor heat dissipation of the combination of the bracket type and the PCB board, the temperature of the lamp board increases, which reduces the LED luminous efficiency and also affects the life of the lamp. And it is difficult to ensure that the LED emits a uniform and soft light with a large area.

Therefore, when designing the LED lighting source, it is necessary to abandon the traditional thinking mode and develop a semiconductor lighting source with a heat dissipation function and a uniform light emitting effect. Although high-power LEDs have a lot of room for development as solid-state light sources, due to the high cost of high-power LED single-lamp packaging, and the secondary design of packaged high-power LEDs, the cost of the manufactured luminaires is astonishingly high. Has directly affected the application and promotion of high-power LEDs in the general lighting market.

Therefore, the development of a new low-cost, highly integrated, integrated semiconductor lighting two-dimensional light source for the promotion of semiconductor lighting is imminent, semiconductor-based lighting two-dimensional light source based on circuit board direct chip packaging is an important direction. At the same time, the thin and light LED two-dimensional light source can be integrated with the building and has individuality, which is in line with the development direction of architectural lighting. Since each LED emits a clear color tone, the user can fully control almost all of the spectrum. By arranging different colored LEDs together, the user can regulate their combined light.

For example, white light combined by red, green, and blue LEDs can give people a "cooler" tone feel by turning off more red LEDs and turning more blue LEDs on. This adjustable flexibility provides some new ways of using light. With the development of building technology, the intelligent technical requirements for architectural lighting are getting higher and higher, especially the color temperature and color that can be adjusted with the changes of seasons and moods are the highest realms of intelligent lighting for buildings. Semiconductors Illuminated two-dimensional light sources have unparalleled performance in this area, which traditional light sources cannot do.

The main technical features of semiconductor lighting two-dimensional light source are as follows:

1. Digital lighting control can be achieved With the rapid development of digital technology, digital homes have gradually entered people's daily lives. Traditional light sources such as incandescent lamps, fluorescent lamps, and energy-saving lamps cannot achieve digital control due to their own technical defects. A significant feature of LEDs as light sources is their ability to maintain lumen efficiency and light color parameters over a wide range of drive currents, enabling digital lighting control.

2. Personalized illumination can be achieved by utilizing LED light characteristics. Partial or full use of R, G, and B light color LEDs for light mixing through an electronic control system, or regular skipping of LEDs using the same or different light colors Change to create a colorful dynamic lighting atmosphere, such a lighting effect is the traditional lighting means can not be achieved. At the same time, personal computers can be used to design programs that can be replaced according to different needs, presenting a unique style and atmosphere.

3. Can be effectively integrated with the building using a chip directly packaged, the lamp can be ultra-thin, ultra-light, can effectively integrate the lamps and building materials, in the case of the lights did not open, so that you do not realize the existence of the lamps At the same time, it is also possible to realize the ubiquity of lamps and lanterns.

4. The low-cost, standardized-scale production can be achieved by direct packaging of a chip on a specially-designed circuit board with a heat sink, as compared with a conventional LED re-combination design using a packaged LED, which reduces the size and significantly reduces the cost. It also makes the product highly reliable.

Developing the significance of intelligent lighting systems based on semiconductor lighting The semiconductor lighting industry, as a new generation of green lighting industry, will have a huge impact on the development of the national economy and environmental protection. Semiconductor lighting technology is a new revolution for traditional lighting. The application of high-power LEDs to general lighting, especially low-cost, highly reliable semiconductor lighting two-dimensional light source industrialization technology, will have a great impact on the progress of semiconductor lighting projects:

1. The traditional high-power LED package form has been basically occupied by foreign patents. It is difficult for domestic enterprises to achieve breakthroughs in patents, and it is increasingly difficult to achieve technological innovation. Through the breakthrough of semiconductor lighting two-dimensional light source technology, it will be better utilized. Advantages afterwards will provide core technical support for China's independent development of the next generation of semiconductor lighting, and realize the leap-forward development of China's lighting industry.

2. The current high-power LED package form is redesigned into a traditional lamp style. There are difficulties in heat dissipation and high cost of optical secondary design. Therefore, the future semiconductor lamps used in general lighting are by no means the appearance of current lamps. Semiconductor lighting II The design of the light source completely eliminates the traditional lighting design model and adopts innovative design thinking, which will greatly promote the development of semiconductor lighting.

3. From the perspective of the development direction and trend of semiconductor lighting, the use of high-power chips directly sealed source is an important direction of development. The development of two-dimensional light sources for semiconductor lighting with direct chip-board encapsulation can also increase the level of automated production and standardize and modularize products. This is often the key to success on the field.

4. The development of semiconductor lighting two-dimensional light sources based on circuit board direct chip packaging will promote the relevance of technology to full-color LED displays, large-screen LCD backlights and other fields.

LED Digital Intelligent Lighting System Challenges 1. The semiconductor lighting industry is a new application of semiconductor electronic technology in the field of lighting. Therefore, it is necessary for the semiconductor industry and the lighting industry to work closely together in order to speed up the development process. The development of the conductor field and the application of the lighting field must promote each other.

2. The semiconductor lighting industry is a sunrise industry. The domestic technology base is still relatively poor, lacks core competitiveness, and has a gap with the international market. However, it has prematurely fallen into the market environment of price wars, ignoring the research and development of new products, resulting in the entire industry. Development is constrained.

3. The common problem in the LED industry is the choice of LED. In order to pursue low cost, it causes the disadvantages of unsatisfactory brightness and unstable reliability. At the same time, because there is no professional design talent, there are also some problems in the design, causing consumers to lose the LED. Confidence, thereby affecting the healthy development of the entire industry.

4. Many existing LED companies have not yet realized the road to brand development. At the same time, with the increasing development of the LED industry, the gradual increase in competition, the LED industry reshuffle the days will not be far away. The author believes that semiconductor lighting companies must see this point, the brand is the ultimate development of the company's road, we should step out in advance.

5. LED digital lighting and lighting should be an organic combination, and only when the two are organically combined, can they produce demonstration effects and scenarios, so that consumers can experience the warm, elegant, changeable, and flexible control that LED smart lighting brings. Light environment. Once the LED intelligent lighting system is widely used in the Olympic Games project and demonstration lighting projects in major cities in China, its use of LED intelligent lighting in homes will be extremely limited. At least intelligent lighting will cause great concern to the relevant national departments and major media. At the same time, the concept of LED intelligent lighting will also be deeply rooted.

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