Full analysis of the LED lamps 15 key design issues

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A semiconductor lighting applications


1, heat


2, the lack of standards, mixed products


3, the price and design quality, and ultimately consumers select the downlight led lighting, lack of confidence


4, semiconductor lighting and traditional lighting in electrical design are very different, the traditional lighting companies need experience / skill accumulation process


5, we are bullish on the market, but also the scale


Features:


1, by adjusting the precision constant current chip, ensuring consistent LED brightness, chroma, and a module for downstream customers provides a standard, customized, reliable, high-quality products;


Old and new lighting design manufacturers, not to be too complex electrical design, just in the external simple circuit design coupled with traditional constant voltage power supply to work, is the fastest and most reliable way;


(3) to solve large-scale LED lighting market on the amount of technology and quality.


Second, the thermal design


1, the shortest th ermal spread path, reduce the heat conduction resistance;


2, increasing the mutual conduction area, increase the speed of thermal spread;


3, a reasonable calculation of the design of cooling area;


And effective use of the heat capacity effect.


The output drive voltage selector:


20W less than the electric drive 48V or so more appropriate;


Large power mains-driven output voltage of about 36V is the most appropriate;


Most of the off-line lighting is 12V and 24V.


Features:


Load the appropriate drive voltage value based on the series and parallel security considerations, and try to unify the voltage to reduce the cost of power supply design specifications;


Based on safety regulations, product design to meet the certification requirements, flow peak exceed 42.4Vac of or DC more than 60Vdc voltage;


From the technical and quality problems to solve large-scale on the amount of the high bay lighting lighting market to consider.


To design products, first to determine who the LED package structure; next consider how to adapt these packages; have few opportunities we have chosen the optical structure is built on top of these packages; a lot of creativity can not play .

semiconductor lighting applications

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1, heat


2, the lack of standards, mixed products


3, the price and design quality, and ultimately consumers select the garde n led lights lighting, lack of confidence


4, semiconductor lighting and traditional lighting in electrical design are very different, the traditional lighting companies need experience / skill accumulation process


5, we are bullish on the market, but also the scale


Features:


1, by adjusting the precision constant current chip, ensuring consistent LED brightness, chroma, and a module for downstream customers provides a standard, customized, reliable, high-quality products;


Old and new lighting design manufacturers, not to be too complex electrical design, just in the external simple circuit design coupled with traditional constant voltage power supply to work, is the fastest and most reliable way;


(3) to solve large-scale LED lighting market on the amount of technology and quality.


Second, the thermal design


1, the shortest thermal spread path, reduce the heat conduction resistance;


2, increasing the mutual conduction area, increase the speed of thermal spread;


3, a reasonable calculation of the design of cooling area;


And effective use of the outdoor light fixtures capacity effect.


The output drive voltage selector:


20W less than the electric drive 48V or so more appropriate;


Large power mains-driven output voltage of about 36V is the most appropriate;


Most of the off-line lighting is 12V and 24V.

alternative light source output value rising again in 2014 will exceed the LED lamps

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ITRI ??the IEK Energy and Technology Research Group Leader Lin Zhixun analysis of the structural stability of the global lighting market, non-residential lighting is still the main market.


Following th e endless possibilities of Japan to create a LED to replace the light and the led flood light bulb gradually won the favor of the U.S. and European consumers, coupled with the reduction in component cost module technology is mature, it is estimated that in 2014 to replace the lighting market scale will exceed the LED lamps. LED the other lighting applications - LED lamps, due to not meet the consumer cost-effective requirements with the L government policy, energy and technology research group leader of the Industrial Technology Research Institute of Industrial Economics and trends Research Center (IEK) Lin Zhixun in LED component costs reduction in module technology has matured under the expected 2014 to replace the lighting market size will exceed the LED lighting, commercial and industrial lighting, the LED lamps focus of development.

LED lamps and LED light source, the interpretation of concept

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The backdrop of the global "energy saving" LED as a new type of light source in all fields have a wide range of applications, development of standards, evaluation of the quality of the performance of LED ligh ting products have been the focus of the work of the Lighting Industry. Various forms of LED, LED packaging, LED arrays, LED modules, LED light, it is therefore different combinations of the lamps, including with a standard lamp type, built-in, freestanding and integral, so that a different maintenance type, such as the light source can be replaceable and non-replaceable, maintainable type and non-maintenance type. In addition, the dazzling array of designs and style, the traditional distinction is difficult to define, especially in the definition of the LED lamps and LED lamps, vague or even wrong concepts have been in the industry caused confusion, which will have a negative impact on the development of led recessed lighting lighting industry, industry and standards development and testing fields.


IEC TC34 was held in Helsinki, Finland in June 2010 LED seminars, discuss the many technical problems at the same time, the LED lamps and LED light issue has also become the focus of discussion in the meeting of experts. In this paper, the introduction of the latest standards information, and analysis on the concept of lamps and lamp, and LED lamps and LED lamps as defined are discussed.


First, the relevant definitions


1, and LED light source definition


LED array, LED modules or LED lights, all light sources.


(1) light (lamp): to generate optical radiation (usually visible) and the production of light.


Note: This term is sometimes used for certain types of lighting.


(2) light-emitting diode (Light EmittingDiode (LED)): issued when non-coherent optical radiation in the forward bias the pn junction semiconductor devices. Spectrum may be issued in the UV, visible or infrared wavelength region.


(3) LED chip (LED die): the assembly of a small piece of s emiconductor material in a given function on the LED circuit.


(4) LED arrays or modules (LED array or module): the high bay lighting package (components) or chip components on printed circuit board or substrate, possibly with optical elements and additional thermal, mechanical and intended to be connected to the LED drive load side of the electrical interface. The device does not contain the power supply and standard lamp. The device can not be directly connected to the branch circuit

LED lamps concepts and problems, and standard resolution

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LEDs into the lighting field, sparked the revolution of a new lighting technology. Different shape, quantity, size of the LED can be arranged in different combinations, different LED lights instead of the LED structure and other characteristics, a wide variety of LED lighting products (fo r example: garden led lights decorative lighting in the lighting field. LED street lamps, LED lamps for light, embedded LED lamps, LED tunnel lamps, LED lamps and traffic signal lamps, etc.) and the traditional lighting source alternatives (for example: LED alternative to incandescent lamps, MR16 PAR lamps, straight tubular fluorescent lamps the T8/T12 etc.). As LED technology continues to improve and people to further improve the lighting sensory visual pursuit, the more specific design and performance requirements of the LED lamps, which put forward higher requirements for lighting manufacturers and lighting designer.


The semiconductor LED solid state lighting is a newly developed in recent years the industry need to master the knowledge of the traditional lighting industry, lighting end product designers and lighting manufacturing personnel, both domestic and international standard dynamic n eed to be familiar with and understand the knowledge of LED devices in particular, to accurately grasp the LED lights, lamps definition difference with the traditional lighting. As the semiconductor industry and the Lighting Industry belong to different industries, and the current lack of standard semiconductor LED solid state lighting (SSL) support, the stage of the domestic LED lighting products to the phenomenon of cohabitation, product performance claims by manufacturers are often difference between the actual results far, the color quality of life prediction is extremely exaggerated, which nurture the development of the LED lighting industry in China and consumer confidence are unfavorable.


From the LED lights, lamps, and its status quo as the entry point, the characteristics of the LED lamps and the existing problems in LED lights, lamps defined on the basis of the analysis, compared with the traditional lighting of the performance, evaluation and desi gn, induction lamp lighting standards in the country and the international situation, the pointing should be combined with the technical elements of the LED lamps to observe and track changes and development of the standard.

LED lights, lamps and related definitions

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1, LED lamp


LED package (the LEDpackage): including wire connectors or other types of electrical connections to one or multiple LED chip components, possibly with optical elements, thermal, mechanical and electrical interface. The device does not include a power supply and standard lamp. The device can not be directly connected to the branch circuit.


LED arrays or modules (LED array or module): the led ceiling lights package (components) or chip components on printed circuit board or substrate, possibly with optical elements and additional thermal, mechanical and intended to be connected to the load side of LED drivers The electrical interface. The device does not contain the power supply and standard lamp. The device can not be directly connected to the branch circuit.


LED light engine (LED light Engine): contains the LED package (component) or LED arrays (modules), LED drive, as well as other photometric, thermal, mechanical and electrical components of the total portfolio. The device through an LED lamps that match the conventional connector directly connected to the bra nch circuit, the LED lamps designed to use the standard lampholders.


Non-integral LED lamps (LED lamp, nonintegrated): containing the LED array (module) or the LED package (component) and the standard lamp components. The device intended by the standard lamp holder connected to the lighting of the LED drive. The device can not be directly connected to the branch circuit.


Integral LED lamps (LED lamp, integrated): contains the LED package (components) or LED arrays (modules), LED drive, standard lamp and the other luminosity, thermal, mechanical and electrical components of the total portfolio. The device is intended to standardized lamp holder directly connected with the branch circuit.


2, the LED lamps


LED lamps (LED luminaire) is based on the LED light-emitting element and matching drive, as well as parts of the light distribution, fixed and protection components of the light emitting devices and appliance s connected to the branch circuit components of a complete lighting fixtures. LED light-emitting element may form the LED package (component), the LED array (module), the LED light engine, or LED lights. LED lamps intended for direct connection to the branch circuit.


Hybrid LED lamps (Hybrid LED luminaire): equipped with high bay lighting-based light-emitting components such as incandescent or fluorescent light of other types of lamps.

LED drive

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LED driver (LED driver): contains the power supply and LED control circuit device, LED package (components), or LED arrays (modules) or LED lights.


Interpretation and LED above definition provides a basis for the difference between LED lights and LED lamps, LED light sour ce and LED lamps Overall the main difference is directly connected with the branch circuit, LED lights are designed to not intend to branch circuit directly connected products, garden led lights lighting is the product of a design to be connected directly to the branch circuit.


LED light engine, LED lights, but its characteristics between the LED lamps and integral LED lamps, the difference is that it contains a lamp that matches the connector, instead of the standard lamp with integral LED lamps and LED lamps is the difference between It can not be directly connected with the branch circuit. Can have a setting function of the light distribution and a standardized connector, the LED light engine can improve the maintainability of the LED lamps.


Second, LED lamps and light fixtures in the difference


outdoor light fixtures lamps and traditional light fixtures on the performance evaluation and design, there are many different places.