Tenth, LED lamps and lanterns' An Gui requests
LED has the energy conservation, the environmental
protection superiority, has become the main tendency in the lamps
and lanterns industry's development. Because LED uses the
technology and the product attribute already and the traditional
lamps and lanterns are entirely different, therefore the present
common lamps and lanterns standard of security standard has not
been obviously suitableLED light .
In order to assist the entrepreneur to face up to this subject, the
security evaluation which by the LED lamps and lanterns this issue
will use technical which, the possible application category, and
present UL uses to carry on the explanation regarding this.
LED lamps and lanterns technology and characteristic
The so-called LED lamps and lanterns, as the name suggests, are
refer to the lamps and lanterns product to use LED (Light-emitting
Diode, light emitter diode tube) the technology make the
illumination source which the white light LED lamps and lanterns
(16) want primarily. LED is one kind of solid state semiconductor
module, it passes through semiconductor p-n using the electric
current along the counter current to tie the coupling
placeLED flood
light. again the belt negative electricity's electron which and
the belt positive electricity's electricity hole two kinds
separates after the semiconductor in carries the child to unify
mutually, but has the photon emission, different type's LED can
send out from infrared to the blue light, and the visual purple to
the ultraviolet ray between and so on different wave length optical
fiberLED spot
light .
Recent development in recent years is spreads the phosphor on blue
light LED, transforms the white light LED product blue light LED.
This operation needs to match the driving circuit generally (LED
Driver) or the power source supply (Power Supply), the driving
circuit or the power source supply's major function is transforms
the alternating voltage into the direct-current power supply,
simultaneously and completes the voltage which and the electric
current tallies with LED, actuates the module which
coordinatesLED strip
light.
The LED lamps and lanterns' light bulb volume is small, the weight
is light, and by the epoxy resin seal, may withstand the high
strength mechanical shock and the vibration, not easy
staveLED tube
light, and the brightness decay cycle is long, therefore its
service life may be 50,000-100,000 hours, surpasses the tradition
tungsten lamp far 1,000 hour and the fluorescence tube 10,000
hours. Because the LED lamps and lanterns' service life may amount
to for 5 ~10 years, therefore not only may reduce the cost which
largely the lamps and lanterns replace, and further because it has
the minimum electric current then to actuate the illumination the
special characteristic, in similar illuminating effect situation,
power consumption also only then fluorescence tube 1/2, therefore
LED also simultaneously has the province electricity and the energy
conservation merit.
However because the LED partial technology still disliked the
insufficiency, therefore at first uses on lamps and lanterns'
shortcoming (develops color including the light quality,
uniformity, color temperature) to be bad LED Ceiling
Light, the radiation not easily, and the price is high, but
improper radiation, will then cause the LED lamps and lanterns'
brightness and the electric circuit spare part service life
accelerates to weaken. Along with the technique of manufacture in
for the past ten years progressing by leaps and bounds, the above
shortcoming, reduces, the light quality gradually including the LED
thermal resistance also in the promotion. in 2008, has achieved 100
Lm/W except the LED white cold light's luminous efficiency, but the
LED warm white light's luminous efficiency, estimates in 2010, may
also from present 70 Lm/W enhance to 100 Lm/W.
Compares with the present other general photo sources, the tungsten
lamp approximately 15 Lm/W, the fluorescence daylight lamps
approximately 45~60 Lm/W, the HID lamps the approximately 120~150
Lm/W, LED luminous efficiencies gradually have had obviously the
superiority; The following is aims at LED and other common lamps
and lanterns' lamp comparison:
Illumination way Characteristic White light LED The heat source are
few, the operating environment is broad, the miniaturization, bears
the vibration, the light beam to be centralized Sunlight
(fluorescence) lamp Fluorescent lamp province electricity, but the
reject brittle has questions and so on mercury pollution
Incandescent tungsten lamp
The low efficiency, Gao Haodian, the life are short, are brittle
Edits this section of 11, products to select the guide application
direction 1st, building outward appearance illumination
Carries on the projection to building some region, nothing but is
uses the control light beam angle the round head and the square
head shape projecting light has, this has the concept with the
traditional projecting light to be completely consistent. But, is
small as a result of the LED photo source and is thin, the
linearity projects lamps and lanterns' research and development to
become LED to project a lamps and lanterns' big luminescent spot
without doubt, because many buildings simply do not have the place
laying aside tradition projecting light which selects.
Its installment is convenient, may the standard also be possible
the vertical direction installment, to unify well with the building
surface, has brought the new illumination vocabulary for the
illumination designer, has developed the creation space. And has
had the influence to the modern architecture and the historical
construction's illumination technique. The LED light emitter diode
tube, is one kind of solid state semiconductor device, it may
change into directly the phonograph the light. The LED heart is a
semiconductor's chip, a chip's end is attached to a support, an end
is a cathode, another end connection power source's positive
electrode, causes the entire chip to seal by the epoxy resin. The
semiconductor chip is composed of three parts, a part is the P
semiconductor, the hole occupies the dominant position inside it,
another end is the N semiconductor, in here is mainly the electron,
middle usually is 1 to 5 cyclical quantum pitfalls. When electric
current through wire function in this chip's time, the electron and
the hole will be pushed to the quantum pitfall, in quantum pitfall
electron with hole compound, will then send out the energy by the
photon form, this will be the LED illumination principle. But the
light wave length is also the light color, is by forms the material
decision which P-N ties.
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