作者：Blade

rgb led color and car light

LED For the consumer, has been widely used in the car, depending on the performance requirements to select the appropriate LED products, LED compared to traditional light sources in addition to the appearance different, the performance output and optical output is also not the same optical design and thermal design is different from the traditional lighting of the design concept is applied to the headlamp will face. However, because of its different from the characteristics of traditional light sources, and to successfully integrate with the body to overcome the technical problems for the models to create a new design concept.

LED has been widely used in interior lighting or instructions with light, we can see from Figure 1, from the dashboard of the car lights, car dome light, make-up lights, welcome light to the vehicle’s tail lights, front and rear turn signals. down lights, third brake lights, and other related applications can see the LED.

rgb led color and car light

From the historical point of view of LED applications, as early as 1992 when the LED used in the precedent for the third brake light; 2000 is further applied to taillights, turn signals and brake lights; take the lead in the 2002 Audi A8 LED light source placed in front lamps as daytime running lights, turn on the imagination of designers and engineers in the front lamps. Can be seen on the many international auto show concept car, the LED lights as a headlight source.

rgb led color and car light

LED inherent small size advantage, applied to the front lamps may reduce the volume of the entire group of lamps, and further to give up valuable space for engines and other related equipment existing halogen bulb or discharge lamp design lamps with a total length 300mm, in concept car design, LED lighting is only 125mm long. By the advantages of small size, with the design of a variety of different design, and then for the body shape to create a different visual perception, escape from the circular design of the traditional lamp.

Different as the application level, the depot also use the LED light source package corresponding to the different environmental requirements, according to the different needs of brightness can be simply divided into two directions with lighting and projection in three different Indication light source visible in the third brake light, rear light clusters (taillights, brake lights, turn signals, etc.), side lights, low lumens light output, low power required of about 70mW ~ 200mW, the heat generated package less affected body, so the package will ignore the impact of this heat, and direct use of the resin material coated to the package as a whole, the resin with low thermal conductivity (W / mK), so its thermal resistance heat is not easy to rise to 50 ~ 200K / W; illumination light source package power relative to the higher brightness of the daytime running lights, fog lights, can be applied to the directions of the light source used class of products, can also be used, before the direction of light, but also because of the loss of power increase (power about 1 ~ 5W), the thermal part can not, as indication light does not consider heat issues still need to use a piece of metal will heat export, in addition to the resin material package in order to maintain the optical efficiency , maintained at below 15K / W thermal resistance; and projection light source, light package brightness needs, the main lighting system (far lights, low beam, fog lights, etc.) before their application, and its single package required 4W or more, while less than 5K / W thermal resistance on the need to ensure that the cooling capacity to maintain the high temperatures of the engine room, and maintain the efficiency of the light output in the range of available

Different level, the total brightness needs about 80 lumens of brightness to the interior lighting is generally used in surface mount (SMT) package, single package about 2 lumens of output, efficiency up to 15 ~~ 20lm / W. About 30lm the brightness of the third brake light, is generally used in the artillery-type package structure (φ = 5mm), the brightness of the single package about 4 lumens, the efficiency of up to 20 ~~ 40lm / W.

rgb led colors and current driver design

This article discusses a simple circuit to adjust the high-brightness LED drive current, the circuit uses non-customized, highly integrated step-down switching regulator (MAX5035), the ability to accurately control the flow of LED current. 6.5V to 76V wide input voltage range, the MAX5035 DC / DC converter to maintain a fixed frequency of 125kHz, and is the ideal choice for automotive applications. The brightness control analog (linear regulator) or low duty cycle (PWM) to achieve.
The high brightness LED lights development background

rgb led colors and current driver design

In recent years, high-brightness LED (HB LED) as light sources in a variety of lighting systems increasingly favored, which is due to the high brightness LED with a high degree of reliability, service life can reach dozens or even tens of thousands of hours, than the traditional incandescent the life of the lamp or halogen several orders of magnitude higher. Based on this advantage, high-brightness LEDs in automotive lighting, public marked with the widely used signal signs and architectural lighting.

The high brightness LED is specially treated PN junction semiconductor devices, the forward bias may issue a white, red, green or blue (may also have other colors of light). Show as a PN junction VI characteristics similar to conventional diode, but with higher junction voltage drop. The forward voltage of VF blue LED (red LED 2.5V to 4.5V), the flow through the LED current is very small; forward voltage of the VF, the current will increase rapidly (the same as the traditional diode). Therefore, we must adopt measures to limit the current rise in limiting to prevent damage to the LED. There are three basic ways of limiting, were compared in Table 1 of these three ways:

Based on a fixed frequency, highly integrated PWM switching converter MAX5035 high-brightness LED power supply schematic, the output current up to 1A. Another similar device MAX5033 output current can reach 500mA. The inductor-based buck regulator can accurately control the flow through the LED (or several series of the current of the LED, the total voltage is 12V). The MAX5035’s switching frequency of 125kHz, input voltage range up to 76V (need to use a higher rated voltage of the input capacitor and diode). This circuit can be controlled in a wide input voltage range and to maintain a constant LED current. Table 2 summarizes the design specifications of the circuit.

The circuit in Figure 1 in the control side the role of a voltage to adjust the LED current. Figure 3 shows the efficiency of the control architecture.

Control voltage and three parallel galvanometer voltage common role in resistance to the feedback (FB) pin of the IC. IC’s internal control loop the FB pin voltage is maintained at about 1.22V, the control voltage and current detection voltage must be kept at 1.22V (set by the resistors R1 and R5), the higher the control voltage will produce more small current.

The following equation applies to this exception can also be used to design the output current and control voltage:

Of which: VRFF = 1.22V, RSENSE R2, R3 and R4 shunt resistor (5Ω).

In many cases, the use of low frequency (50Hz to 200Hz) PWM way to adjust the LED current is very convenient to adjust the brightness by controlling the pulse width. LED during each pulse to maintain the same brightness, naked eye can detect short-term brightness variations, but the method has the advantage of this regulation is that the spectrum remains unchanged, the use of amplitude modulation spectrum will change with the change of the flow through the LED current .

rgb led downlight and balance point

Since the sixties of the last century, the first commercially available LED lights market, LED lighting industry has been applied 40 years of industry on the middle and lower reaches has formed a relatively complete industrial chain, LED is used in increasingly more industry, this article from the following four aspects to the macro described the advantages of LED lighting compared to other light sources in the significance of indoor applications, LED light source in the development and promotion of the range of applications in the field of indoor lighting, and LED interior lighting products direction.

rgb led downlight and balance point

In the field of indoor lighting, the main applications of traditional light sources in general, including incandescent, halogen, fluorescent lamps, PAR lamps, metal halide lamp. This type of light source power consumption of a single color and control, and light thermal radiation, in some special places by certain limitations. The LED light source has a full color easy to control, energy saving and environmental protection advantages, to create a light environment can not be replaced by other conventional light sources, high-quality, fully meet the market demand for upscale interiors, mood lighting and lighting design to the interior space of the new way of thinking. In particular, the emergence of high-power LED LED lighting in the field of interior lighting find a breakthrough to accelerate the application of LED in the field of interior lighting.

When it comes to LED applications, I can not talk about some of the advantages of LEDs compared to conventional light sources. These advantages, it is the LED mood lighting of indoor commercial area of ​​application of thin flat point.

LED green lighting products, known as the 21st century is now virtually the entire world’s eyes are focused on this new type of light source, compared with conventional light sources, has incomparable advantages:

1, high purity, bright rich colors. LED products covering almost the entire visible spectral range, and high color purity. The traditional way is to get the color of light to incandescent lamp and filters greatly reduce the luminous efficiency;

2, and long life. The actual LED life over 50,000 hours, or even several times for general light source several times;

3, light source, no mercury, no ultraviolet beam. The LED is a solid light source, green, especially suitable for professional place for perfume shops, jewelry stores, museums, art galleries, which can meet the special requirements of the lighting of the display of goods;

4, light-emitting solid, good seismic performance, solid and reliable;

5, energy saving, economical, maintenance-free;

6, the dynamic color control, brightness adjustable LED combination of the three primary colors can be used PWM to achieve a change in color

7, LED strong light direction, the luminous flux of high utilization, small size, easy-to-LED lighting design and control of light intensity distribution;

LED can be DC low voltage power supply, safe and reliable;

9, LED is not a start-up temperature limit can be instant start, generally a few ms, and can reach instantaneous full luminous flux output.

Then talk about the applications of LED indoor lighting project;

rgb led flashlight and Xenon lamp

White LED Driver drive power limited xenon lamp flash to illuminate the shooting scene provides a cost-effective choice. This article describes the basic concept of xenon lamp, and the details of a typical low-power based on the ON Semiconductor NCP5007 chip, low-cost flash drive circuit design.

rgb led flashlight and Xenon lamp

Digital camera and is equipped with camera phones have new product into a mainstream product, these products within the digital image sensor based on CCD or CMOS technology. Able to support the image sensor in low light conditions, the flash circuit became necessary solutions for digital cameras, camera phones are becoming more common. Satisfy the flash requirements of the main light source is a xenon bulb and now the new high-brightness white LED lights.

The main advantage of the xenon lamp flash pulse generated by high power light output, while the advantages of the LED program is a relatively small size and thin, and longer conduction time in the video capture, the light output with the xenon lamp is only average compared. In particular, the xenon lamp flash pulse is very short, to enable the camera to capture photos made into a static picture. They need a special drive to produce high pressure and high energy storage capacitor to store electrical energy.

We found that the white LED panel driver to drive power limited xenon lamp flash to illuminate the shooting scene provides a cost-effective choice. This article describes the basic concepts of the xenon lamp, and details a typical low power / low-cost flash applications.

The xenon lamp has a glass enclosure at each end of an electrode, filled with low pressure rare gas mixtures. In the steady state, as shown in Figure 1, the voltage on the electrode is set lower than the trigger voltage. At this point, no current flows through, and the system remained stable until the trigger voltage applied to the third electrode. For the considered low-power light, this high-voltage pulse in the 1kV range, it comes with a small core transformer by a sudden discharge of the capacitor C2 is triggered.

The gas mixture is excited by plasma flash. For consumer applications, flash duration is 2ms. Flash type, the energy stored in the capacitor C1 can be as low as 1 joule (small camera), up to several thousand joules (professional application). Flash energy consumption shown in Equation 1:
Depending on the type of xenon lamp, the capacitor charging voltage is basically for 160V to 600V. The energy of low-power hand-held camera needs no more than a few joules, and the output voltage range of 160 to 250V. Higher voltages can be seen generally in a professional studio equipment used.
In addition to the DC voltage, high voltage pulse to excite the plasma in the bulb, high-intensity arc generated between both ends of the electrodes. Pulse amplitude depends on the type of lamp used in the system, ranging from lower 1.6kV to 10kV. Micro-xenon lamp is applied to the third external electrode of the lamp 1.6kV/5μs pulse triggers the pulse shown in Figure 2 for pulse transformer and high voltage capacitor connected arising. Charge the capacitor to the flash dc voltage (200V), and suddenly after the trigger button S1 to the pulse transformer primary side discharge. From the secondary side of high pressure is applied to the outer surface on the bulb, the flash is excited.
The main advantage of this concept is the light output and pulse duration is very short, quick photographs moving subject frozen at some point. The disadvantage of this design is the size of the storage capacitor, you need to board a higher voltage, and during filming capacitors need to be recharged (consumer applications, the charging time of 5-10 seconds).
According to the sensitivity of the imager and lens aperture in the general environment for consumer applications, a relatively small capacitance is sufficient to photograph in bright pictures. Therefore, you can use a simple converter to the battery voltage up to 200V voltage of the low-pressure xenon lamp required.

rgb led flood lights and white led driver

 

General white LED current is about 20mA, but the high brightness LED 200 to 300mA current. If your product requires three to four high-brightness white LED; brightness average general practice is to string them connected together. On the market, most of the white LED driver chip can only drive 20mA. Hit a series high current LED applications will have to think of other ways. Intersil’s EL7516 is a typical step-up chip. This chip operates at 1.2MHz fixed-frequency PWM mode, built-in 1.5A, 200mΩ MOSFETs. Figure 1 shows the EL7516 a typical circuit. DC-DC boost the role of EL7516 will be 2.7 ~ 5.5V input into a constant voltage of 12V. General PWM control chip, the FB pin is connected to the error amplifier is compared with 1.3V. R1, R2 resistor value is selected to set the output voltage.

With the development of white LED lights, it’s more widely applied. In the past, the white LED is the most common application is as a small-size color LCD backlight. White LED brightness increase, its application has spread to other areas; such as a flashlight or cell phone camera auxiliary lighting. The following describes a general boost chip to drive high current LEDs efficient circuit.

EL7516 lines of constant pressure to change the drive LED constant current circuit is very simple. Shown in Figure 2, the FB pin of R1 replaced by LED grow lights, change R2 can adjust the current through the LED. R2 values ​​selected from the following formula: R2 = VFB / IledVFB FB pin voltage; that 1.3VIled is the current through the LED

For example, if the requirements of Iled 300mA; then R2 needs to 4.3Ω.

On the circuit of Figure 3, the biggest drawback is the loss of R2. R2 by 300mA, the resistance of the power consumption is close to 0.39W. Such a great power not only affect the efficiency, we also need to use the relatively large size of the resistance to accept 0.39W heat. In general, these applications are battery powered. Efficiency and line PCB space requirements are more stringent, now let us look at how to improve the efficiency of this line.

egardless of the circuit changes how EL7516 will adjust the duty cycle so that the FB voltage to maintain 1.3V. The assumption D1 positive voltage drop is 0.6V, the voltage drop across R2 is about 0.7V. To maintain a 300mA LED current, R2 can be used to 2.3Ω. R2 power consumption also dropped from the original 0.39W 0.21W. Although the power consumption has been reduced, but R2 have to use a half-watt resistor to achieve this line.

rgb led flood lights and white led driver

A cheap TL431 added to the circuit as a 2.5V reference. As mentioned earlier, the EL7516 will remain FB 1.3V, the current through R4 is: (2.5-1.3) / 20k = 60uA. FB is a high-impedance pins, we assume that this 60? A full inflow of R5 and made the same 1.2V voltage drop. 0.1V, the rest of the R2 to complete. In order to facilitate the purchase, R2 is selected as 0.39Ω. So the current through the LED tube is about: 0.1/0.39 = 255mA. R2, power consumption is significantly reduced to: 0.1X0.255 = 26mW.

rgb led high power and led car use

The basic use of the controller reduces the cost of the car displays, signal and lighting electronic equipment. Switch adjustment circuit in the highest efficiency light LED to control the brightness of the lights.

Recently, LED tube has been replaced by low-voltage halogen technology, widely used in the car for general lighting. Design engineers have long life and low operating DC voltage LED lighting two advantages quickly gave approval.

On the other hand, in order to make these new LED technology to develop, you need to use more complex, more expensive vehicle electronic control system. The emergence of new ultra low-end 8-bit microcontroller (MCU), allowing design engineers can significantly reduce the cost and complexity of the system, use this alternative lighting solutions to be able to be profitable.

Due to the use of low-end MCU, high-brightness LED tunnel (HBLED) has developed many new applications, to continue to attract more users. New input, the HBLED including: monitor, car signs, lights, mobile devices and lighting equipment.

Overall, the LED has a nonlinear volt-ampere characteristic, the need for limiting the control of power consumption and light output of these two important factors. Power consumption and light output depends on the current drive the HBLED the ideal power is the constant current source. The high brightness LED lights, standard LED in its output power. Traditional LED output power is typically limited to below 50mW, but HBLED is able to provide 1-5W of output power.

Want to get the constant current source in many different ways, such as the use of series resistors, linear current source or switching regulator. The use of the switching regulator is the most common energy-saving solution. Switching regulator to cut off the input voltage, the duty cycle to control the average current, in order to achieve its current control – when the load requires a higher load current, the circuit connected to the time extension to fit the load current changes .

The HBLED the current is generated by the average power stored in the inductor L within. Switch is closed, the inductor will store energy as much as possible, the current flowing through the HBLED will be enhanced until it reaches the maximum or switch off. Then, when the switch is turned off, the energy stored in the inductor will provide HBLED current. This current will gradually weaken until you reach the minimum or switch is again closed.

rgb led high power and led car use

Current control to solve the problem becomes very simple, based on the the HBLED above the MCU controller dimming. Right the HBLED to implement dimming There are many different techniques, some of which may include the patent issues. Under any conditions, the dimmer on the same basis, namely: fully open in the HBLED the normal operating current HBLED period of time, and then completely to the continued closure of the period of time. Periodically at a faster rate to complete the action (the human eye can see) to give the impression HBLED light levels darken. The three techniques most commonly used are: pulse width modulation (PWM), frequency modulation and the bit angle modulation.

rgb led lamps and super bright led

Invented in the 1960s, it is the use of electrons and holes in semiconductor materials combined with each other and release energy, the energy band (Energy Gat,) rank changes, they release energy to light-emitting display. The LED has a small size, long life, low driving voltage, low power consumption, fast reaction rate, good shock resistance, it is widely used in the field of signal indicator, digital display. As technology continues to progress the development of ultra-bright LED has been successful, especially in the successful development of white LED lights, making it more and more used in the lantern decoration, and even the lighting in the area.

rgb led lamps and super bright led

l super bright LED features

Compared with the traditional lighting, ultra-bright LED has the following advantages:

1) long life, reliability and durability, very low maintenance costs LED can be used continuously 105h, 100 times longer than ordinary incandescent bulbs;

2) high-efficiency can already reach 201m / w. Expected by 2005 will reach 501m / W [1], the LED) the spectrum almost all concentrated in the visible light spectrum, and its luminous efficiency up to 80% ~ 90
%, LED energy-saving lamp energy saving but also 1/4;

3) color, light color simple example, 12 inches of red traffic lights, it uses low-efficiency 140W incandescent lamp as a light source, generated by 2000lm white The red filter, the light loss of 90%, leaving only under 2001m of red, 18 red LED light source lamp used in Lumileds Lighting Company, including circuit losses, consumes only 14W, and can produce the same luminous efficiency;

4) light speed fast car lights is an important area of ​​application of the LED light source, LED response speed (ns level), the high level LED brake lights, installed in the car can reduce rear-end accidents.

Bright LED in recent years has been in a car near light applications, such as the German Audi Audi A86.O, Italy Fioravanti concept car introduced at the 2003 Geneva Motor Show, the Yak, the U.S. Ford Motor Company recently at the Detroit Motor Show launched ModEL U are beginning to be bright LED used in the design of the headlamps.

Despite the ultra-bright LED has many advantages, but there are still the following shortcomings:

1) low power single LED tube market power generally in 5W following, not yet more high-power LED, which is the biggest bottleneck of LED difficult to become a lighting preferred;

2) the need to strictly control the temperature LED is a semiconductor material, with the diode as the PN junction diode highlight the power is relatively large, so the same with the power semiconductor devices, need to consider the problem of heat dissipation, junction temperature is too high will directly affect the LED life, and increased LED light decline in serious cases, the LED burned out;

3) the high price in addition to low power, the price is the main factor of the LED is difficult to become a lighting Although the LED has been most understanding, most people optimistic, but its high price is difficult to be accepted by consumers, the current single yellow LED about O. 6 yuan / month, green and blue single LED at about 1.8 yuan / the price of the white LED of about 2.2 to 5.5 yuan / month; dozens of single LED portfolio, the cost will greatly increase such as an LED installed in lawn lamp, the unit price is equivalent to general lawn several times, the LED to become a mainstream light source of lighting in the future, it must be moving in the direction of the large lumen, the cost of it be possible to reduce the market possible breakthrough.

Characteristics of the two super bright LED flood lights

HPWA-xH00 Lumileds Lighting Company, a super bright LED, it as an example the analysis of ultra-bright LED features. Figure 1 is the forward voltage drop (VF) and the forward current (IF) curve, the curve shows that when the forward voltage exceeds a certain threshold (about 2V), commonly referred to as the turn-on voltage can be approximated that , IF and VF is proportional to. Table 1 shows the electrical characteristics of the major super bright LED. Table 1 shows, the super bright LED’s highest IF up to 1A, VF is usually 3 ~~ 4V.

rgb led light bar and light solution

The initial resolution of the imaging device is quite limited, the image quality is poor. But as technology evolves, the resolution 300,000 pixel VGA grade progress to 100-2000000 pixels and quickly toward the more than 3 million pixels of resolution level forward. Continued improvement in imaging devices, processors and software, consumers now want to get more digital camera functions, such as the flash in low lighting conditions, even automatic focus. In this resolution, good quality output as well as pictures and video sharing becomes more practical, these higher-density CMOS imaging devices need to get more reflected light from the target, thus further promote the needs of the integrated flash function.

rgb led light bar and light solution

To the traditional Xenon flash placed into a fairly compact size of the phone challenging design engineers, because the thick flash high-voltage capacitors must also be coupled with the bulb and the associated transformers and electronic circuits, while the traditional The flash does not apply to the use of video capture. Fortunately, LED manufacturers have started to improve through the use of new materials such as indium gallium nitride (InGaN) and other power LED lights output.

On the other hand, semiconductor manufacturing technology innovation and package improvements can produce the number of lumens, and photoelectric conversion efficiency. To generate the highest light output, power LED requires 400mA or higher, and pulse width in the current output capacity from 50 to 200ms. However, for video applications, you need a smaller current, but time is not limited to a single pulse. In addition to size restrictions, and ergonomic considerations, these camera modules usually integrated in the rear or top of the screen, so that users can use the LCD as a viewfinder grab image, which is particularly common in the folding mobile phone. Imaging device and the lens bodies may also have to be able to rotate, so that the phone can be face-to-face communication tools as video conferencing mode, is expected to be more common in the design of the 3G network phone because there is enough bandwidth can be used in video conferencing.

Discussion of these trends can be clearly seen become more and more high quality and resolution of the screen display, while the size is also growing, in particular, is a feature-rich multimedia mobile phone is expected that the future will more and more more content such as streaming video or broadcast video, Internet browsing and e-mail, camera and photo viewing, as well as games and access to information services. Therefore, when the phone screen to use when no call more frequently, but if the phone’s battery life is not enough, these functions will be limited. Therefore, the high efficiency of the system power management, including the screen and button backlight power management becomes very important functions such as camera flash past, only to see the high-end phones will gradually become the standard configuration.

These will also have a white LED backlight driving circuit design challenges: bigger screen represents a more regional need backlight, it is necessary to enhance the overall efficiency of the drive device; due to limited space, it must be integrated in a single package multi-function; not only consider the size, the thickness must be reduced, in particular, sliding and folding the shape of products.

Phone white LED tubes driver circuit is frequently used in the two architectures: LED is connected in series inductor boost converter circuit; each LED stable current source to drive the charge pump drive. The inductive solution can bring the best overall efficiency of the charge pump due to the use of small ceramic capacitors as energy conversion devices, the smallest. Figure 1 and Figure 2 shows the typical application circuit of the two driven architecture. At present, the power LED efficiency continue to be improved, reducing the power consumption of the backlight LED, it can provide higher light output with less of the LED. This means that two or three years ago, four LED backlit 1.5 inch screen, now just two power only half of the LED will be able to get the same performance.

To meet this demand, you need one capable of driving two LED new products such as led flood lights, and can support a very low current low-power standby operation of the backlight of the screen. To solve this problem, NCP5602/12 series of charge pump LED driver devices designed to support ultra-low current ICON mode, while the simple single-wire or I2C serial bus provides two LED ordinary backlight. In addition to support for the latest thin and light package trend, these products are designed using very thin LLGA micro packaging technology (2 × 2 × 0.55mm) to support the ultra-thin applications. In addition, part of the improved LED materials and design has a lower forward voltage (reduced from 3.6V to 3.1V), inductive solution, the same power that can drive more LEDs. More complex LED drive device, such as NCP5604A / B has a voltage conversion mode select, provide optimal power conversion at the same time lower power consumption of the integrated current source, the lithium-ion batteries used in mobile power supply most of their working time to reach 85% conversion efficiency (PLED / Pin).

LED flash camera phone configuration, this Semiconductor has developed the NCP5608 multiple-mode charge pump LED driver, which drives four LEDs for the backlight of the main screen and sub screen, and is provided to drive 1W power LED up to the high current output of 400mA. These features are designed to share a high-efficiency charge pump converter circuit, in order to minimize the number of external capacitors.

The third development trends of the led lighting design industry

Trends: continued to promote green led lights, environmentally friendly lighting

Professor Zhan said that the moment of led lighting design needs to pay attention to the problem of energy efficient, that is environmentally friendly lighting. Architectural led lighting design standards, which clearly defined the unit of space lighting power density design and planning, the efficacy of the lighting load per square meter beyond the rules and regulations formulated by the illumination, this design case of excessive energy consumption, which can not pass. In this regard, the lighting designer need to choose the light-efficient lighting equipment, or change of lighting to achieve the required standard.

led lighting design

However, the rational use of efficient light source, the practice is not easy to achieve. Such as rural areas, landscape lighting does not need light, but local leaders will be asked to “highlight”; in the bright environment of the downtown commericial street, and there will be ” comparisons of light”. Many small towns, the business district at nigh, often as a city that never sleeps. In fact, this is an abnormal development of led lighting design.

Therefore,  excessive landscape lighting caused a huge waste of money and energy. As this phenomenon is still relatively common, Zhang professor called on designers to adhere to the road of energy efficient efficient lighting, which is very meaningful.

Trend: Made in China should be among the high-end R & D centers

For domestic lighting industry, Zhang professor stressed that lighting products produced in China in the number of the largest in the world, but the quality and the ability of independent innovation and R & D needs to be improved.

Project of the Beijing Olympic Games, Asian Games in Guangzhou, China’s LED business performance is remarkable. However, the advanced international level, there are still huge gaps in product performance and technical aspects. Because these two items on the lighting technical standards and product quality is very demanding, many of the lighting project are dominated from abroad.

At present, the competitive LED lighting manufacturers are very less. The main reason is the gap between research and innovation; The industry as a whole is less favorable environment which is not conducive to the healthy development of enterprises; investment scale and the poor is too large; In addition to the disadvantage of the patent. How to enhance the corporate brand image and enhance the corporate brand image and enhance the design and development of force. That will be the key to improve the overall strength of the post-Olympic era in China’s lighting industry.

The second development trends of the led lighting design industry

Trends: designer guide lamps instead of lamps to guide designers.

Perhaps the vast majority of lighting professionals agree that 2010 is a massive attack on the traditional lighting of the year for LED industry. It is no doubt that LED products are excellent. However, any lighting project, priority LED products, which has become the beginning of the bottleneck of many designers career.

led lighting design

In this regard, the point of view of the surface of the smoke is a reasonable choice of light source according to the lighting quality requirements.

He pointed out that current lighting acknowledged a confusing phrase: a city with a different partition, you can use different lighting to show the different effects. Cultural district in the city reflects the precipitation of a historical business district needs to be pretty bright, LED lights, and the rational use of neon, make cultural precipitation and flavor of the times each to shine and complement each other.

There are a lot of designers like zoned for the prison, thinking that LED is designed for the”shiny” and “brilliance” and “technology” born. In fact, the only designer master the use of appliances, led lighting design is to achieve development by leaps and bounds.

LED changes to use, the American designer has done lighting design for the Tokyo Ginza Chanel is very good case.

The original American lighting designers find Ginza building brighter and brighter than another, so they decided to adopt the idea that “all others are bright, while I am lonely dark. Abandon the LED bright colors, using only black and white two colors, the night, the LED tube will be to create a classic Chanel totem. In the eyes of tourists, the Ginza is very bright, but the building is very dark; Other building is a dynamic flashy, the building is gentle classic.

Whenever the development of productive forces can not control the new tool, the relations of production will be a problem, the output also non-human wish. Presumably, in theled lighting design industry to comply with this rule.

It comes to rapid development of China’s lighting industry in 2010, one of the pioneers of the field of architectural lighting become attached to more than half a century of academic dean Professor Zhan Qing spin told reporters, after the storm of the lighting industry for decades. China’s lighting industry is bound to open up their own one day. The lighting designer should also pay more attention.