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LED driver power supply introduction and characteristics缩略图

LED driver power supply introduction and characteristics

LED driver power supply is the power supply is converted to a specific voltage and current to drive the LED light-emitting voltage converter, usually: LED driver power supply inputs include high-voltage frequency AC (i.e., utility), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (e.g., the output of the electronic transformer) and so on. The output of the LED driver power supply is mostly a constant current source that can change the voltage with the LED forward voltage drop value. The following for the first time in the industry to provide some knowledge of the LED driver power supply.

LED driver power supply introduction and characteristics插图

1, what is the LED driver power supply

  LED drive power supply to convert the power supply to a specific voltage and current to drive the LED light-emitting voltage converter, usually: LED drive power supply inputs include high-voltage frequency AC (i.e., utility), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (e.g., the output of the electronic transformer) and so on. The output of the LED driver power supply is mostly a constant current source that can change the voltage with the change of LED forward voltage drop value.The core components of the LED power supply include switching controllers, inductors, switching components (MOSfet), feedback resistors, input filters, output filters, etc. According to the requirements of different occasions, there should also be input filters, output filters, and so on. According to the requirements of different occasions, but also the input over-voltage protection circuit, input under-voltage protection circuit, LED open-circuit protection, over-current protection and other circuits.

2, LED drive power supply features

  (1) high reliability

  Especially like the LED street lamp drive power, installed in the high altitude, maintenance is not convenient, maintenance costs are also large.

  (2) high efficiency

  LED is an energy-saving products, drive power supply efficiency should be high. For the power supply installed in the lamps and lanterns within the junction heat dissipation is very important. High efficiency of the power supply, its power loss is small, in the lamps and lanterns within the heat is small, also reduces the temperature rise of the lamps and lanterns. It is beneficial to slow down the light decay of LED.

  (3) high power factor

  Power factor is the power grid requirements for the load. Generally 70 watts or less of electrical appliances, there is no mandatory indicator. Although the power factor of the individual appliances with low power factor is not much of an impact on the power grid, but the use of lighting at night, the same kind of load is too concentrated, will produce more serious pollution of the power grid. For 30 watts ~ 40 watts of LED driver power supply, it is said that in the near future, may be on the power factor aspects of the requirements of certain indicators.

  (4) drive mode

  Now there are two kinds of pass: one is a constant voltage source for more than one constant current source, each constant current source individually to each road LED power supply. This way, the combination of flexible, all the way LED failure, does not affect the work of other LED, but the cost will be slightly higher. Another is a direct constant current power supply drive, LED series or parallel operation. Its advantage is that the cost is a little lower, but poor flexibility, but also to solve the problem of a LED failure, does not affect the operation of other LEDs. These two forms, in a period of time co-exist. Multiple constant current output power supply method, in terms of cost and performance will be better. Perhaps the mainstream direction in the future.

LED driver power supply introduction and characteristics插图2

  (5) surge protection

  LED surge resistance is relatively poor, especially the ability to resist reverse voltage. Strengthen this aspect of protection is also very important. Some LED lights are installed outdoors, such as LED street lights. Due to the grid load start dumping and lightning induction, from the grid system will invade a variety of surges, some surges will lead to LED damage.

  (6) Protection function

  Power supply in addition to the conventional protection function, it is best to increase the LED temperature negative feedback in the constant current output to prevent the LED temperature is too high; to meet the requirements of safety regulations and electromagnetic compatibility.

 3、Categorized by driving mode

  (1) constant current

  Constant-current drive circuit output current is constant, while the output DC voltage is different with the size of the load resistance changes within a certain range, the load resistance is small, the output voltage is low, the greater the load resistance, the higher the output voltage;

  Constant-current circuit is not afraid of load short-circuit, but the load is strictly prohibited completely open circuit;

  Constant-current drive circuit to drive the LED is more ideal, but relatively high prices;

  Should pay attention to the use of the maximum withstand current and voltage values, which limits the number of LEDs used.

  (2) voltage regulator

  When the parameters of the voltage regulator circuit to determine the output voltage is fixed, while the output current with the increase or decrease of the load and change;

  The voltage regulator circuit is not afraid of load open-circuit, but the load is strictly prohibited from being completely short-circuited;

  Regulated drive circuit to drive the LED, each string needs to add a suitable resistance to make each string of LED display brightness average;

  Brightness will be affected by the voltage change from the rectifier.

 4, the overall constant current and circuit-by-circuit constant current mode of operation advantages and disadvantages

  Compared with the overall constant current, although the circuit by circuit constant current has more disadvantages, the cost is also higher. But it can really play a role in protecting the LED and extend the life of the LED, so the circuit-by-circuit constant current is the future trend.

LED driver power supply introduction and characteristics插图4

 5, LED power supply shortage

  LED driver power supply currently exists for insufficient reasons:

  Production of LED lighting and related products, the company's technical staff do not know enough about the switching power supply, to make the power supply can work properly, but some critical evaluation and electromagnetic compatibility is not enough to consider, there are still some hidden dangers;

  Most of the LED power supply manufacturers are transformed from ordinary switching power supply to do the LED power supply, the characteristics of the LED and the use of knowledge is not enough;

  At present, there is almost no standard on LED, most of them refer to the standard of switching power supply and electronic rectifier;

  Now most of the LED power supply is not unified, so most of the volume is relatively small. Purchasing a small amount, the price is high, and component suppliers are not very cooperative;

  Stability of LED power supply: wide voltage input, high and low temperature operation, over-temperature, over-voltage protection and other issues have not been solved one by one;

  First of all, the overall life of the drive circuit, especially the key devices such as: capacitors at high temperatures directly affect the life of the power supply;

  Is the LED driver should be challenged to higher conversion efficiency, especially in driving high-power LED is more so, because all the power not as light output as heat dissipation, power conversion efficiency is too low, affecting the LED energy-saving effect of play;

  At present, in the smaller power (1-5W) applications, constant current drive power supply costs accounted for the proportion has been close to 1/3, has been close to the cost of the light source, to a certain extent, affecting the market promotion.

LED drive power supply of the two major classifications

  LED driver power supply is the power supply is converted to a specific voltage and current to drive the LED light-emitting voltage converter, usually: LED driver power supply inputs include high-voltage industrial frequency AC (i.e., utility), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (e.g., the output of the electronic transformer) and so on. The output of the LED driver power supply is mostly a constant current source that can change the voltage with the LED forward voltage drop value.

  Due to a variety of specifications of different LED power supply performance and conversion efficiency varies, so choose the appropriate, efficient LED special power supply, in order to truly reveal the characteristics of high-performance LED light source. Because the low efficiency of the LED power supply itself needs to consume a lot of electricity, so in the process of power supply to the LED will not be able to highlight the energy-saving characteristics of the LED. In short, the LED power supply in the LED work in the stability, energy saving, life expectancy, with an important role.

What is the classification of the power supply of LED?

  A. LED power supply can be divided into two main categories according to the driving method:

  A. Voltage regulator type:

  1, the voltage regulator circuit to determine the parameters, the output is a fixed voltage, the output current but with the increase or decrease of the load and changes

  2, although the voltage regulator circuit is not afraid of load open-circuit, but the load is strictly prohibited completely short-circuit

  3, the rectified voltage changes will affect the brightness of the LEDs

  4, in order to make each string of regulator circuit to drive the LED display brightness uniformity, you need to add the appropriate resistance to be able to

  B. Constant current type:

  1, constant current drive circuit to drive LED is ideal, the disadvantage is that the price is high

  2, constant current circuit is not afraid of the load short circuit, but the load is strictly prohibited completely open circuit

  3, constant-current drive circuit output current is constant, while the output DC voltage is different with the size of the load resistance within a certain range of change

  4, to limit the use of the number of LED, because it has the maximum withstand current and voltage values

 Second, LED power supply according to the circuit structure can be divided into six categories:

  1, conventional transformer step-down:

  This power supply has the advantage of small size, the shortcomings are heavy weight, power supply efficiency is also very low, generally in 45% ~ 60%, because the reliability is not high, so generally rarely used.

  2, capacitor buck:

  This way of LED power supply is susceptible to grid voltage fluctuations, power supply efficiency is low, not suitable for LED in the flashing use, because the circuit through the capacitor step-down, in the flashing use, due to the role of charging and discharging, through the LED of the instantaneous current is very great, easy to damage the chip.

  3, electronic transformer step-down:

  The shortcomings of this power structure is low conversion efficiency, narrow voltage range, generally 180 ~ 240V, ripple interference.

  4, resistance buck:

  This power supply method power supply efficiency is very low, and the reliability of the system is also lower. Because the circuit through the resistor buck, by the grid voltage changes in the interference is large, not easy to make a regulated power supply, and the buck resistor itself to consume a large part of the energy.

  5, RCC buck switching power supply:

  This way of LED power supply advantage is the regulator range is wider, power supply efficiency is higher, generally can be in 70% ~ 80%, more widely used. Disadvantages are mainly switching frequency is not easy to control, load voltage ripple coefficient is large, abnormal load adaptability is poor.

  6, PWM control type switching power supply:

  At present, PWM control mode design of LED power supply is more ideal, because the output voltage or current of this switching power supply is very stable. Power conversion efficiency is very high, generally can be as high as 80% ~ 90%, and the output voltage and current are very stable. This way of LED power supply is mainly composed of four parts they are: input rectifier filter part, output rectifier filter part, PWM voltage regulator control part, switching energy conversion part. And this circuit has perfect protection measures, belongs to the high reliability power supply.

LED driver power supply nine performance characteristics required

  According to the rules of the power grid and the characteristics of the LED drive power requirements, in the selection and design of LED drive power supply should take into account the following nine major performance characteristics requirements:

  1. high reliability, especially like the LED street lamp drive power, installed in the high altitude, maintenance is not convenient, maintenance costs are also large.

  2. High efficiency LED is an energy-saving products, drive power supply efficiency should be high. For the power supply installed in the structure of the lamp, especially important. Because the luminous efficiency of the LED with the LED temperature increases and decreases, so the LED heat dissipation is very important. High efficiency of the power supply, its power loss is small, in the lamps and lanterns within the heat is small, also reduces the temperature rise of the lamps and lanterns. It is favorable to slow down the light decay of LED.

  3. High power factor Power factor is the power grid requirements for the load. Generally 70 watts or less of electrical appliances, there is no mandatory indicators. Although the power factor of the individual appliances is not very low power factor is not much impact on the grid, but at night we light, similar loads are too concentrated, will produce more serious pollution of the grid. For 30 watts ~ 40 watts of LED driver power supply, it is said that in the near future, maybe there will be a certain indicator of power factor requirements.

  4. drive mode There are two kinds of pass now: one is a constant voltage source for more than one constant current source, each constant current source alone to each road LED power supply. This way, the combination of flexible, all the way LED failure, does not affect the work of other LED, but the cost will be slightly higher. Another is direct constant current power supply, LED series or parallel operation. Its advantage is that the cost is a little lower, but the flexibility is poor, but also to solve the problem of a LED failure, does not affect the operation of other LEDs. These two forms, coexist in a period of time. Multiple constant current output power supply method, in terms of cost and performance will be better. Perhaps the mainstream direction in the future.

  5. Surge protection LED surge resistance is relatively poor, especially the ability to resist reverse voltage. Strengthen this aspect of protection is also very important. Some LED lights installed in outdoor, such as LED street lights. Due to the grid load start dumping and lightning induction, from the grid system will invade a variety of surges, some surges will lead to damage to the LED. Therefore, the LED driver power supply should have the ability to inhibit the intrusion of surges, to protect the LED from being damaged.

  6. protection function power supply in addition to the conventional protection function, it is best to increase the LED temperature negative feedback in the constant current output, to prevent the LED temperature is too high.

  7. Protection lamps outside the installation type, the power supply structure should be waterproof, moisture-proof, the shell should be resistant to sunlight.

  8. Drive the life of the power supply to match the life of the LED.

  9. To meet the safety regulations and electromagnetic compatibility requirements.

  With the increasing application of LED, LED driver power supply performance will be more and more suitable for the requirements of LED.

Determine the quality of the LED driver power supply seven principles

  1, give up more than 4-way output, the development of single or two-way output, give up high current and ultra-high current, the development of small current.

  The more the number of output channels the more complex, the current interference between different out of the way to solve the high cost, such as not solving the failure rate is high. In addition, the more the number of output routes, the total output current is also the greater the current is the main reason for the heat, the voltage itself does not directly lead to heat, simply put, the heat is proportional to the square of the current, that is to say, the current increased to the original 2 times, then, the heat will be increased to the original 4 times, the current increased to the original 3 times, the heat will be increased to the original 9 times. In summary, single or two-way output LED lamp power supply failure rate will be much lower.

  2, intelligent control is one of the advantages of LED lamps and lanterns, and the power supply is the key to intelligent control.

  Intelligent control in the LED street lights and LED tunnel lights lighting applications on the most mature conditions, the most obvious effect, intelligent control can be in different time periods, according to the density of road traffic to realize the power of the lamps and lanterns stepless control, not only to meet the requirements of the application, but also to achieve a huge energy-saving effect, you can save a lot of money for the highway authority. The application of tunnel lighting can not only save energy, but also in accordance with the brightness of the tunnel outside the tunnel automatically adjusts the tunnel entrance and exit brightness, to provide drivers with a visual overstage to ensure driving safety.

  3, give up high-power, ultra-high-power, choose a higher stability of small and medium-power power supply.

  Because the higher the power, the greater the heat, the more compact parts inside, not conducive to heat dissipation, and the temperature is the main culprit of power failure. Moreover, the development of small power supply is relatively more mature, stability and cost advantages. In fact, many high-power power supply program has not been verified by time and practice, are hastily launched the project, are experimental products, so the failure of numerous. In contrast, small and medium-power power supply due to the development of earlier, more mature technology programs.

  4, heat dissipation and protection is the main external factors of power failure.

  Not only will the power supply itself will heat up, the lamps will also heat up, the two sources of heat how to reasonably emit out of the lamp design engineers must consider the question of the

LED driver power supply common problems缩略图

LED driver power supply common problems

 LED driver power supply common problems

  In order to save energy and electricity, LED has been a great promotion, but the LED needs a power supply driver, its good or bad will directly affect the life of the LED, and therefore how to do a good job of a LED driver power supply is the LED power supply portrayal of the top priority. This article analyzes some of the LED driver power supply problems, expect to be able to provide engineers with a little assistance.

LED driver power supply common problems插图

  1, the driver circuit directly affects the LED life

  What we say LED driver including digital drive and push-like drive two categories, digital drive refers to the digital circuit drive, including digital dimming control, RGB full-color change. Extrapolation drive refers to the analog circuit drive, including AC constant current switching power supply, DC constant current control circuit. Driver circuit consists of electronic components, including semiconductor components, resistors, capacitors, inductors, etc., these components have a life expectancy, the failure of any one device will lead to the failure of the entire circuit or some of the functional failure. LED life is 5-10 million hours, according to 50,000 hours, continuous lighting, nearly 6 years of life. Switching power supply life is very difficult to reach 6 years, the switching power supply warranty period on the market is usually 2-3 years, up to 6 years warranty power supply is a military grade, the price is usually 4-6 times the power supply, the usual lamps and lanterns factory is very difficult to afford. So LED lamps and lanterns are mostly faulty driver circuit.

  2, heat dissipation problems

  LED for cold light source, the operating temperature can not exceed the limit value, but also to leave a certain margin when depicting. The depiction of the entire lamps and lanterns to think about the appearance of beautiful, easy to install, light distribution, heat dissipation and many other aspects of the problem, to seek a balance point in many elements, so that all the lamps and lanterns is the best. LED lamps and lanterns is not a long time to carry out the development of not many experiences to learn, many of the depictions are constantly being perfected. Some LED lamps and lanterns manufacturers use power supply for outsourcing or outsourcing, lamps and lanterns depictor does not know much about the power supply, to the LED heat dissipation space is larger, to the power supply heat dissipation space is smaller. Usually depicts a good lamps and lanterns and then look for the appropriate power supply to supporting, so that the power supply to bring certain difficulties in supporting. Often encountered due to the lamps and lanterns internal space is small or high internal temperature, and cost control is low, can not match to the appropriate power supply. Some LED lamps and lanterns factory has power supply development ability, in the beginning of the portrayal of lamps and lanterns pre-evaluation, power supply portrayal synchronization, can deal with the above problems. In the portrayal of the LED heat dissipation and power supply to think about the heat dissipation, the whole control lamps and lanterns of the temperature rise, so as to portray a better lamps and lanterns.

  3, the power supply depiction of the problem

  a, power description. Despite the high luminous efficacy of LED, but there are 80-85% of the heat loss, resulting in the lamps and lanterns inside the temperature rise of 20-30 degrees, if the room temperature of 25 degrees, the lamps and lanterns inside the 45-55 degrees, the power supply for a long time in the high-temperature environment, to ensure that the life of the power must be increased to the margin, usually left to the margin of 1.5-2 times.

  b, component selection. Lamps and lanterns in the internal temperature of 45-55 degrees, the power supply internal temperature rise of about 20 degrees, the temperature of the neighboring components to reach 65-75 degrees. Some components in the high temperature condition parameters will drift, but also some life will be shortened, so the equipment should be selected to be able to use at higher temperatures for a long time, pay special attention to the electrolytic capacitors and wires.

  C, electrical function depiction. Switching power supply aligned with the parameters of the LED depiction, mainly constant current parameters, the current resolution of the brightness of the LED, if the batch current error is large, the brightness of the whole batch of lights is not uniform. And the temperature change can also cause the power supply output current offset. Usually the batch error is manipulated within +/-5%, to ensure that the brightness of the lights together. LED forward voltage drop error, the power supply depicts the constant current voltage scale to include the voltage scale of the LED. Multiple LED series use, the minimum voltage drop multiplied by the number of series for the lower limit voltage, the maximum voltage drop multiplied by the number of series for the upper limit voltage, power supply constant current voltage scale should be slightly wider than this scale, usually upper and lower limits of 1-2V margin.

  LED lamps and lanterns left to the power supply scale is small (unless the power supply is external), so the demand for PCB depiction is higher, to think about the elements are also more. Safety interval to stay enough, the need for input and output isolation of the power supply, the primary side circuit and the secondary side circuit needs to withstand voltage 1500-2000VAC, in the PCB at least to stay enough 3MM interval. If it is a metal shell of the lamps, the whole power supply board should also think about the high voltage and the shell of the safety interval. If there is no space to ensure safe spacing conditions should be used in other ways to ensure insulation, such as punching holes in the PCB, plus insulating paper, potting insulating adhesive and so on. Other cloth board should also think about the heat balance, heat components should be evenly distributed, can not be placed collectively to prevent part of the temperature rise. Electrolytic capacitors away from heat sources, slowing down the aging, extending the life of the application.

  e, certification challenges. At present, there is no domestic specification for LED lamps and lanterns, the relevant parts of the country is studying the development of the domestic sale of lamps and lanterns certification is to refer to the norms of lighting fixtures, foreign sales is to do CE or UL certification, and some reference to foreign LED lamps and lanterns specification to do. So aligned with this situation, the portrayal of switching power supply to satisfy the above specifications together is relatively difficult, we can only be aligned with different needs to meet the different certifications.

LED driver power supply common problems插图2

  4, the use of parameters.

  Outsourcing power supply in the selection of the main constant current and constant current voltage scale. Constant current value is selected for the LED specification current is lower. Voltage scale selection should be moderate, try not to pick a larger scale, to prevent the waste of power.

LED drive power supply circuit of the 3 kinds of protection methods

  1. Protect the LED circuit with a fuse (tube)

  Due to the fuse is disposable, and slow reaction speed, poor effect, use trouble, so the fuse is not suitable for LED lights in the finished product, because the LED lights are now mainly in the city's colorful project and brightening project. It requires LED protection circuit to be very harsh: in excess of the normal use of current can immediately start the protection, so that the LED power supply path is disconnected, so that the LED and the power supply can be protected, in the whole light is normal and can automatically restore the power supply, does not affect the work of the LED. The circuit can not be too complex volume can not be too large, the cost should also be low. So it is very difficult to realize the way of using fuses.

  2. The use of transient voltage suppression diode (referred to as TVS)

  Transient voltage suppression diode is a diode form of high-performance protection devices. When its poles by the reverse transient high-energy impact, can be 10 negative 12 times the speed of a very short period of time, so that their own high resistance between the two poles immediately reduced to low resistance, absorbing up to a few kilowatts of surge power, the voltage between the two poles of the clamping element in a predetermined voltage value, effective protection of electronic circuits in the precision components. Transient voltage suppression diode has the advantages of fast response time, transient power, low leakage current, good consistency of breakdown voltage deviation, clamping element voltage is easier to control, no damage limit, small size.

  However, in practice, it is found that it is not easy to find TVS devices to meet the required voltage value. LED bead damage is mainly due to excessive current caused by overheating inside the chip. TVS can only detect over-voltage can not detect over-current. To choose the right voltage protection point is difficult to grasp, this device can not be produced is also difficult to use in practice.

LED driver power supply common problems插图4

  3. Selection of self-recovery fuses

  Resettable fuses, also known as polymer positive temperature thermistor PTC, is composed of polymer and conductive particles. After special processing, conductive particles in the polymer to form a chain-like conductive pathway. When the normal operating current through (or components in the normal ambient temperature), PTC self-recovery fuse is a low-resistance state; when the circuit has an abnormal overcurrent through (or ambient temperature rise), the large current (or ambient temperature rise) the heat generated by the polymer rapid expansion, which also cuts off the conductive particles constitute the conductive path, PTC self-recovery fuse is a high-resistance state; when the circuit overcurrent (or over-temperature state) disappears, the polymer is a high resistance state; when the circuit (or over-temperature state), the polymer is a high resistance state. When the circuit overcurrent (overtemperature state) disappears, the polymer cooling LED driver power supply, the volume returns to normal, in which the conductive particles and re-constitute a conductive path, PTC self-recovery fuse is the initial low-resistance state. In the normal operating state of self-recovery fuse heat is very small, in the abnormal operating state of its heat is very high resistance is very large, it also limits the current through it, thus playing a protective role. In the specific circuit, you can choose:

  ① Split protection. General LED lights are divided into a lot of series connection branch. We can add a PTC element in front of each branch to protect them separately. The advantage of this approach is high precision and good reliability of protection.

  ② Overall protection. Add a PTC element in front of all light beads to protect the whole lamp. The advantage of this way is simple, does not occupy the volume. For civilian products, the results of this protection in actual use are still satisfactory.

For more LED industrial lighting consultation, welcome to consult recolux

The development situation of medium and high power LED lighting and the characteristics and development of industry technical level缩略图

The development situation of medium and high power LED lighting and the characteristics and development of industry technical level

Medium and high power LED lighting products are mainly outdoor, industrial lighting and special lighting products, which are mainly used in municipal roads, outdoor parking lots, airports, ship ports, factory workshops, warehouses, stadiums and other fields. Technical difficulties and maintenance costs are high, and performance and quality requirements are strict. For example, outdoor lighting needs to cope with high and low temperatures, rain, snow, wind and sand, lightning, salt spray and other complex natural environments, industrial lighting emphasizes the strong corrosion, strong impact, electromagnetic interference and other industrial environments to provide all-weather stable lighting. Overseas regions LED lighting penetration rate is significantly lower than our market, with higher replacement demand.

The development situation of medium and high power LED lighting and the characteristics and development of industry technical level插图

1, industry characteristics

(1) Cyclical

With the gradual maturation of LED lighting technology and by the international concept of energy saving and emission reduction, LED lighting applications market has a large incremental and replacement space, the market demand shows a rapid upward trend, the overall cyclicality is not obvious.

(2) Regional

At present, with the continuous improvement of the industrial chain, the domestic LED lighting enterprises in product development, manufacturing has formed a unique scale advantage, become an important production base for global LED lighting products, the domestic LED lighting enterprises are mainly concentrated in the southeast coastal region, the formation of the Pearl River Delta, the Yangtze River Delta and Fujian and Jiangxi areas of the three major industrial clusters. Internationally, North America, Europe and other developed countries, LED lighting companies mainly focus on channel construction and brand operation, the global lighting market to Asia, North America and Europe to form the main industrial layout. Overall industry regional characteristics are obvious.

2, LED lighting industry market situation

(1) LED from the light source alternative development to the field of lamps and lanterns, promote the global LED lighting market gradually expanding

Compared with LED light source, the integrated design of LED lamps and lanterns is thin and light, the life span is generally longer, both energy-saving and design aesthetics, fully embodies the energy-saving, healthy, artistic and humane lighting development trend; In addition, with the development of Internet of things and other technologies, intelligent control and lighting scenes will change the way of using the product, improve the added value of LED lamps and lanterns. LED from light source replacement to lamps and lanterns field, replacement and incremental market brought about by upgrading and application scene expansion continue to expand.

(2) North America occupies the channel and brand advantage in LED lighting industry, with ODM, OEM and other modes of purchasing products for globalization layout.

North America, represented by the United States, has a long history of the lighting industry, with many well-known brands, in the LED lighting industry chain, mainly focusing on channel construction, brand operation, with a leading edge.

Based on the above channel and brand advantages, North American lighting manufacturers generally through ODM, OEM and other modes of procurement of LED lighting products to enterprises, globalization layout. 2022 first half of North America accounted for China's total exports of LED lighting products accounted for 29.8%, for China's LED lighting products, the largest export destination, the United States is also China's largest volume of a single lighting products export market. Market, 2021 annual exports of more than 10 billion dollars.

The development situation of medium and high power LED lighting and the characteristics and development of industry technical level插图2

3, medium and high power LED lighting products development situation

(1) with the outdoor, industrial lighting demand to complex, customized evolution, the enterprise's R & D, manufacturing, service requirements will be further enhanced, recolux competitiveness will be strengthened, industrial concentration is also the inevitable result of high-quality development.

(2) lower energy loss is the urgent need for industrial lighting, LED lighting energy-saving significant

Traditional industrial lighting equipment due to low energy conversion efficiency, energy consumption is greater, has been unable to meet the requirements of energy saving and emission reduction in the industrial sector, industrial enterprises have been facing the challenge of controlling costs, there is an urgent need for cost-effective lighting solutions. LED lamps and lanterns can accurately realize the lighting required by industry, light pollution can be controlled compared to traditional lighting can be reduced by 50%, the highest energy loss can be controlled to reduce 70%, in the all-weather operation, LED lighting energy saving is significant. 70%, in the all-weather operation of industrial places with significant energy-saving effect.

(3) LED outdoor, industrial lighting replacement process is late, the export trend is good, ushering in market development opportunities

(4) outdoor, industrial lighting overall technical difficulty is higher, the technology application is late

The emergence of LED lighting breaks the traditional light source design methods and ideas, become the new direction of lighting technology development, which home lighting, commercial lighting and other smaller power products to replace the environment to adapt to simple, so earlier ushered in a large-scale upgrading of the market demand, industrial maturity is higher.

The development situation of medium and high power LED lighting and the characteristics and development of industry technical level插图4

In contrast, outdoor, industrial lighting is mainly used in municipal roads, industrial workshops and other large-scale applications, the power is generally larger, and home, commercial lighting fixtures overall power is lower. Outdoor, industrial lighting heat dissipation design is strict, balancing the weight and volume and heat dissipation, light efficiency, stability and other issues have become the industry's technical difficulties, the overall application of technology and replacement process is late.

For more LED industrial lighting consultation, welcome to consult recolux