Tag Archives: guangzhou

How to detect green led strip

27 Jun


led strip lights appliances, because of its and the traditional lighting electricity compared with superior characteristic, since entering the lighting after the field, especially in the current global “energy conservation and emission reduction” of the background, the application scope is acceleration expansion. Accordingly, manufacturers and users more urgently wanted to know the LED illumination electrical appliances product quality standards. This paper that is from that starting point, LED lighting appliances to the testing and certification of a popularity is introduced. Introduction will focus on CCC authentication is within the scope of the LED lighting safety requirements.

The green led light strip appliances to the important terms and basic concepts

LED (light emitting diode): A positive bias noncoherent irradiation p-n “semiconductor devices.

LED module: in printed circuit board integration on one or more of the formation of the LED components, with optical components, may be thermal components, machinery components and electrical interface, but not include power and standard lamp holder.

Leds: contain LED module and standard lamp holder of components, divided into integral (with LED drive) and the integral (don’t take LED drive) two kinds

LED Light source: LED, LED module and LED lights collectively referred to as the LED light source.

LED Connector: LED module based on the printed circuit board with the use of miscellaneous built-in fittings.

LED Drive: contains power and LED control circuit of the device, the purpose is to make work LED light source.

green led light strips and lanterns: can assign, filters or change LED the light given by instruments, which include supporting, fixed and protect LED light source the necessary all the parts (but not including LED light source itself), and the necessary auxiliary devices and will and circuit power connection device.

LED lamps safety requirements

First of all, we have to clear lamps and the basic principles of safety standards, “light to shine, and lamps light”-the use of light source by lighting a, lamps and lanterns is optimal light divergence, ensure the safety of the light source used vessels, and therefore lamps to light does not involve the safety standards itself requirements; “Lamps and light source separation, named for the lighting service”-a light source the light lamps use for lighting service, so the standard classification and named the lamps and lanterns and light source should not be concerned, and shall be directly reflects its service, ability of object and the place.

In the above two full understanding of the basis of the principle, we can find that, at present had the lamps and lanterns of the national standards apply to both LED lamps and lanterns, just LED some of the characteristics of the known lamps in the existing standard is in concrete manifestation, need to be further according to the characteristics of LED lamps, formulate LED lamps and the performance of the special and energy efficiency standards. That is, LED lamp to be put under in embedded lamps, fixed general lamps, will move a type general lamps, aquatic animals box lamps, power socket installation night light, ground embedded lamps in 6 categories in the lamps, the application for CCC authentication.

Here is the way to question and answer, solve LED lamps involved in CCC authentication security requirements of a common problem.

How to divide the authentication unit?

(1) installation; (2) the light source species; (3) to prevent to get an electric shock protection level; (4) the shell protection grade; (5) mounting surface materials, heat insulation materials cover; 6 the light of the control device; 6 points above the same, and the structure of the similar can be divided into the same unit.

Prevent to get an electric shock protection form? What are those?

Ⅰ Class-basic insulation + protection grounding; class-double insulation or reinforced insulation; class-the power supply voltage SELV + lamps SELV working voltage.

Power supply terminals should take the positioning and protection measures how?

General in the terminals on insulating liner, and adopt double screws, the purpose is to make the connection may from stranded inner conductor in decent shape a free conductor contact metal component (for power supply conductor) or live parts (for ground conductor).

Tapping screws in the use of any restriction?

Unless there is proper lock device (such as spring washers), tapping screws cannot be used in connection load flow components; unless every joint at least two single, tapping screws can’t utilize to provide continuous grounding.

How to judge which parts of the glass or translucent mask should be made according to the requirements of the fragile parts impact test?

Judge remove these components, lamps IP protection grade lower, prevent getting an electric shock protection is whether customary, ultraviolet light source and still sputtering harm protection was still the standards. If there is an a negative judgment, it should be them as insubstantial parts and impact test.

Used for hanging lamps charged soft cable has any mechanical performance requirements?

Should choose the conductor cross-sectional area large enough soft cable, make the suspension of conductor are not more than 15 force N/was.

Universal symbols or symbol lamps and lanterns have any requirements?

(1) mounting surface level temperature requirements: normal work thermal test and abnormal work in thermal test measured surface temperature of the installation of no more than 90 respectively + 5 ℃ and 130 + 5 ℃;

(2) the light control device type requirement: take accord with IEC61558-2-4 / IEC61558-2-6 / IEC60989 transformer and electronic lamp control device, no further requirements;

(3) and installation surface spacing requirements: at least 10 mm (lamps shell in light control device in succession, the light control planes device to the lamps enclosure at least 3 mm, lamps and surface of the enclosure of the surface to install surface at least 3 mm); Or at least 35 mm (lamps shell in light control device inside the projective device to control, lamp discontinuous mounting surface have direct access);

(4) with heat protector type requirement: take standard symbols and symbols (… is not more than 130) thermal protector, without further requirements; With standard symbols (… more than 130) thermal protector and don’t take the thermal protector, should accord with the light of the control device further fault conditions hot test requirements.

The need below what circumstance equipped with elastic line fixed frame?

Provide design or use the lamps and lanterns do not remove soft cable or delicate line (soft power cable or soft line, Internet cable), and the stretched out more than 80mm lamps, need to be equipped with soft line fixed frame.

Ⅲ Lighting fixtures plugs have special requirements?

Ⅲ Kind of lamps and lanterns can’t use GB1002 / GB1003 with the plug

How to complete the lamps installed loop?

The lamps installed only through the loop instruments or terminals to accomplish coupler.

SELV component can be no insulation?

Can. Nevertheless, if the insulation, it must be in accordance with related insulation resistance and electrical strength requirements.

Ⅰ Lighting fixtures in what place must be grounded?

And between live parts only basic insulation, and palpable (installation is complete, for replacing light source or starter and open) or easy and supporting surface contact the metal components.

In the insulation resistance and the thrilling intensity of the former should be how pretreatment?

Should samples will in the damp 48 hours, the humidity should be held in 91% 95%. Temperature is 20 -30 between any safe value.

LED lamps different polarity of the indirect vital parts have LED module and LED drive, the functional requirements conduction, whether do not need to undertake insulation resistance and electrical strength test?

LED lamps different polarity between live parts also need to undertake insulation resistance and electrical strength test, the test should be changed polarity between live parts of functional components demolished, make the test voltage added to parts of the insulation.

SELV, between the parts have creepage distance and the requirement of the electrical clearance?

Merely working voltage in 25 V the following, they didn’t ask for electrical clearance and creepage distance of requirements. Note that, less than 1mm slot, calculation creepage distance is only slit width; less than 1mm of clearance, the calculation of the electric space neglected.

LED Lamps endurance test with unusual requirements?

No matter whether there is work abnormal condition, with LED lamps are unified on durability test by 1.10 un, lasts for 240 h (routine work 10 x 24 h).

LED Lamps thermal test of what unique requirements?

Normal work thermal test use 1.06 Un (measured with the value parts used when temperature 1.00 Un), if LED module and LED drive connections for welding or not detachable way of terminal blocks, is no exception work thermal test, or use 1.10 Un work for abnormal heat test.

Can move the smooth degree of lamps are there any requirements?

Will move type lamp should not 6 tilt dumping; 15 tilt while the dump, the atypical work in thermal test should be in accordance with the lamp placed after dumping position.

The power supply socket is installed night light thermal test what special requirements?

In addition to GB7000.1 listed in the possible exception working conditions, with fresh mulch cover of night light abnormal working conditions, lamps should be in 1.00 under the Un for work or until 7 h damage.

On the ground of IP protection grade embedded lamps and what are the special requirements?

(1) IP65 + drainage device; (2) IP65 + IP67;

Include at least a group of the scheme, can have more IP level, such as IP65 + IP67 + IP68.

Led versus fluorescent will open up a general lighting market

25 Jun

Over the past forty years, led strip lighting industry is always the revolution of science and technology information striker, become the industry and the focus of attention of the capital market, led industry means striking the benefits of active: use new technology process of continuous innovation to build the smaller, faster and cheaper led lighting products.

With the improvement of LED manufacturing process and the development of new materials, its application scope expands unceasingly.
led tube fluorescent are about to hit a third round of general lighting bring growth cycle. LCD back lighting is the main driving force, general lighting times ahead. Conventional lighting market 70 billion us dollars, is back light 12 times of market and to 2020 dollars; Drop in cost is the key to open the general lighting. LED lighting has the lowest cost, but cost more than nine years of reply. The cost of less than 2 LED backward to 3 years. The market is lighting outbreaks.
LED market advance to see that started in 2000 LED the promotion of the mobile phone that fast growth of around 44%, the market started in 2005 saturated. The second round of growth was mainly coming from the application of LED backlight, began in 2007. The third round growth was predominantly general lighting market start. Our concern is the market at the open.
Expected after 2014 back light market will be regional saturated. We think the time node is likely in advance, so led versus fluorescent lights industry to the further development of words, need to get another breakthrough, the breakthrough is general lighting market, in 2010, the general lighting market probably at $70 billion.
Soft light from LED with the cost structure, and other lamps and lanterns to see, LED mainly includes LED chips, extension and so on, we think that the cost will follow the following LED five path, to 2015 is expected to drop 86%. The cost of LED decrease of 20% per year, a single encapsulates the luminous efficiency and flux every 24 months double, and 2010-2015 warm white LED the luminous efficiency increased by 135% and the corresponding costs fell by 57%.
LED lighting and a decline in the cost of technology of ascension that will make it in the overall lighting market to get better and faster development, the future will be greatly enhanced the total performance.

Juno led downlight industry at the shuffle

20 Jun

led strip lighting market demand for raising temperature, in 2011 the size of the market is expected to reach annual growth of the above, along with the LED lighting is regarded as the most robust growth LED industry future application market, all LED lighting of the layout of the company in field will become the next wave forces the key industry growth, at present, the LED upstream of the grain industry LED lighting of revenue in the proportion of whole about 2 ~ 3 into, but FengZhuangChang downstream steps of progress is differ, benefit is relatively slow appeared.

According to the market estimates that 2010 year led 12v downlight penetration rate in about 4% ~ 5.5%, and 2010 year LED lamp hair smooth effect though rate and fluorescent lamp is consistent, but 2011 years is expected to challenge the permeability 10%, luminous efficiency also have a chance to increased by 20%, and transcend fluorescent, because incandescent lamp gradually into medical history and government subsidies to promote factors, LED lighting gradually from the past (the type used, for example, to reveal ark lamp, plant floodlight lamp, medical treatment, and began to walk into the commercial, household Lord lighting market.

Part of the value of kitchen led downlights industry development potential, 2010 have aggrandizement illume layout, and with the TV in the fourth quarter turn back lighting demand light, also make the proportion of LED lighting growth, it is estimated that 2010 years the proportion of crystal electric lighting will reach 2, 2011 is expected to grow to 3 into, and Thai valley in the fourth season high power lighting is hopefully increase the proportion of to nearly, the ladies in the fourth quarter is expected to round to the proportion of 3 into lighting.

But LED FengZhuangChang bibcock in 2010 though light lighting launched their own brands, but the main business is still lay particular stress on the backlight application, the proportion of lighting. Only about 5% ~ 6%, and although that 2011 m light lighting business have the opportunity to grow multiples, is expected to contribute $1.5 billion revenue, accounting for about 10% of overall revenue levels, but still belongs to the low proportion of lighting, compared with 2010 YuDongBei points out that LED lighting products revenue of about 1 billion to 1.1 billion yuan, the scale has surpassed light, on the mainland in 2011, Europe, the us and Japan market surge in order, 2011 LED lighting revenue is expected to reach 2 billion-2.5 billion yuan, and rising stars YiDiSen is specializing in high power LED lighting, maintain the 3 gross margin, potential development is after is good.

With the new competitors are joining the market, recent foreign legal person named light, etc FengZhuangChang possible future expansion in traditional strong customer base face difficulties, or even lose their industry’s leader, in addition because downstream encapsulation competition is intense, is expected to ship in 2011 average unit price decline could LED, gross margin and impact. LED companies have argued that the TV back lighting and lighting will be in the future growth of the twin-engine =, but TV back lighting is in the next two to three years later the bottleneck facing growth slowed sharply, and LED lighting will be pulled the continued growth of kinetic energy of important industry, now LED lighting is embryonic stage, the future industry still has a fierce competition, the anticipated market forces will face the shuffle.

LED industry detailed control parameters

18 Jun

Article 1

For nearly 30 years, led strip lighting technology experienced a rapid development process. LED to its inherent high efficiency, long life and low loss, vibration resistance and response speed advantages such as a wide range of applications, such as a lamp, screen, traffic light and so on, are currently exploring it is applied to the lighting area.

Because China has not establish LED photometric standards, severely affecting LED quality improvement and the values of quantities of unity, affecting international trade and international technical communication between LED and promotion, therefore, although in recent years the Chinese quality and variety LED products have improved, but the gap with foreign advanced countries is obvious.

In this situation, we set out for the measurement of optical parameters LED the meticulous research, and LED the establishment of national photometric standards.

2, the LED Tube parameters are introduced

LED optical parameters of the important aspects in is: Flux, the luminous efficiency, luminous intensity, light intensity distribution, wavelength.

2.1 are The luminous efficiency and flux

The luminous efficiency is the ratio of the flux and power. The luminous efficiency represents the light source of energy savings of characteristics. It is to measure performance modern light source is one of the vital index.

2.2 are The luminous intensity and light intensity distribution

flexible led strip lighting luminous intensity is characterized in a direction of its luminous intensity, due to the different space angle in led light is quite different from that of strong, and we studied the light intensity distribution characteristics of bed. The parameters of practical significance are very big, directly affect the LED display device of the smallest view. Such as the sports facility LED large color displays, if choose LED single pipe distribution range is extremely narrow, so in the face of the larger screen angle viewers will see the image distortion. And the traffic signal lights also demand is bigger range of one can identify.

2.3 wavelength

For LED spectral characteristics we basically see its monochromatic is fine, but also to pay attention to the red, yellow, blue, green, white LED and so on main color is pure. Because in many cases, such as the traffic lights to the color is asked to compare strictly, but according to observe some Chinese LED light now in some green, red for scarlet, from this phenomenon come to see us LED the spectral characteristics of special study is very necessary and very interesting.

3, LED photometric measuring principle

3.1 are The light intensity measurements

The light intensity standard light, LED and equipped with V (λ) filter silicon photoelectric diode installation and debugging in optical benches, especially strictly the filament position, LED parts and accept surface location.

For LED speaking, its shiny surface is the shape of the dome, light distribution is very special, so in different distance is measured, light intensity value will change from inverse distance square laws, even if fixed distance is measured, but because the receptors to accept different area, the light intensity value will also change. Therefore, in order to improve the measurement precision, should the distance is measured and accept area size to give relatively fixed as well. For example, distance is measured according to GIE recommends the 316mm, receptors area for 10 x 10mm fixed. In the same distance is measured. LED the corner is different, its brilliant light will be changed, so in order to get the best value, had better read the maximum readout Rt is preferred.

3.2 flux measurement method

Measuring leds luminous flux in angle changed the photometric on the turntable, installing the LED on the table, the table in the horizontal plane around the vertical axis rotation + 90 degrees, LED in the perpendicular plane around the metering axis rotate 360 degrees. the horizontal plane and the vertical plane of control is through the rotation of the stepping motor to fulfill. Turntable in guide rail move, when measuring standard lamp, turntable should leave guide.

When be measuring the big wheel in a perpendicular shaft revolves around a horizontal plane, step angle of 0.9, 90 the positive direction, 90 in the opposite direction. LED oneself moreover is in rotation, in every level angle, the vertical plane every 18 a signal acquisition, turn over 360 samples were collected after 20 data, press type calculating total flux.

Absolute flux measurement LED the second kind of method is integral method. This method is simple and feasible, but the measurement precision is not high.

The spectrum of light emitting diode power distribution measurement, the purpose is to keep the spectral characteristics and LED chromaticity, moreover is measured in order to have LED luminosity an amended.
When measuring spectrum power distribution LED, attention shall be paid to the following, in a standard irradiance spectra and comparison of solar spectrum because standard light intensity much better than LED, in order to avoid this problem, the best in the standard before the lights and a neutral filter, make its solar spectral intensity close to LED.
The spectrum width LED was exceedingly narrow, in order to accurately describe the spectral distribution LED outline, had better use the width of monochromator narrowband wavelength measurement for 1nm wavelength interval for good.

4, last word

At present, the LED country photometric standards established and calibration equipment has been quite a number of standard LED tube, in the process, we have accumulated a lot of experience, and then we will at all levels and the comprehensive measuring department LED production units for dissemination, unified supervision. This LED to the quality of China will increase the level of play a role in promoting, also for countries in the field of high technology research and development from a to provide security.