Now more and more people used the led flashlight into the life.I think many people like buying the LED flashlight from the online shop and there are many choices for choosing. You always can choose the satisfying one.but now i do not want talk about it, i just tell you something about fundamental information of the led flashlight and hope it is useful to you.Flashlight foundation affair: luminous body, the battery, the circuit, the housing, reflector cup, circuit positions, switches, etc. flashlight foundations affair out by the current from the battery, and then reaches the circuit, via the circuit to adjust the voltage and current, and then output to the light emitting body by the luminous body.
Luminous body
The flashlight light emission body are: Incandescent, LED and HID, LED brightness units unified with Lumen (Lumens) labeling, it is often said luminous flux.
1、LED:
Most popular LED full Chinese name is "light-emitting diode, small power LED are generally bulls used in 1AA or 3AA, I am not gone say much about this, in fact, too small power, can be use at home, but too weaker for outdoors, first and foremost to talk about more of a large power 3W outdoor use, the primary representatives present the most popular in the U.S. CREE LED, long life up to 100,000 hours, according to the manufacturer's data.
Primary model parameters:
P3，350mA luminance 73.9-80.6Lumens，700mA luminance 119.7-130.6Lumens.
P4，350mA luminance 80.6-87.4Lumens，700mA luminance 130.6-141.6Lumens.
Q2，350mA luminance87.4-93.9Lumens，700mA luminance141.6-152.1Lumens.
Q3，350mA luminance93.9-100.4Lumens，700mA luminance152.1-162.6Lumens.
Q4，350mA luminance100.4-107Lumens，The most current year night 1000mA.
Q5，350mA luminance107-114Lumens，The most current year night1000mA.
R2，The most current year night1000mA 1000mA.
Of course, they are lot of models, the commonly used is P4, Q2, Q5, of which the most popular at the moment than the Q5 a high efficiency, brightness, a large current to 1A, brightness up to 250 lumens. If you want a long-range floodlight with MC-E and P7, really good, for bicycles and urban lighting.
Halogen bulbs
It was a lot on the market before the LED get popular, at moment it only few.Popular bulbs (incandescent). Needless to say this, the most representative is the Steller flashlight, Accompanied our growth at our Childhood, but a little bit behind the times, but as it is low-cost still has a lot of marker.
Tungsten filament Xenon Xenon bulbs.
The xenon filling inside, brightness forward a lot, the yellowish color of the light.Characterized by high brightness, but life is short, and it was up to 40 hours at the mercy.
HID (The high pressure of the xenon gas discharge lamp)
Xenon lamp inside the bulds, high-voltage lighting, ultrahigh brightness, power of common power of 10W, 24W, 35W, 1000-3000 lumens brightness maximum lamp life 3000 hours, LED flashlight focus leader. Interests a lot of errors fallacy: because the lights cups and Anjing identity, volume can not get down, the 18650 volume than the average single LED flashlight partial Eve, the most important is "expensive", the cheapest is over 1000, not for average players spending.
battery
The Common Flashlight battery are: AA (batteries), AAA (batteries), AA alkaline batteries usually can divided to dry batteries (1.5V) can not re-charge and the nickel-metal hydride battery (1.2V) can re-charge .
There is a lithium battery voltage of 2.45-4.20V models 14500,16340,18650, many people see these figures is somewhat confusing, ask to distinguish, in fact, very simple, specific model numbers are for reasons, like 14,500 the diameter of it is 14 mm, the length is 50 mm; 16340 batteries is 16 mm in diameter, and is 34 mm in length, and so on, the 18650 battery is diameter 18 mm, length 65 mm.
The lithium battery zoning care circuit (to prevent overcharge and over discharge circuit) masters should know that lithium batteries can not overcharge and over-discharge of the If the battery charge is full of power still in the chargerout come, but also to continue to charge occurs leaks or other adverse consequences; if over-discharge, the battery used to a little power still not charge, so that the city lead battery scrap the moment the installation of a care circuit will notthis problem, but many people mistakenly believe that the volume of a large, than without care circuit (Battery size on previous Paragraph) To Eve that add 1 millimeter or so in diameter, add 2 mm or so in length. Some difficulties, makes some LED flashlight put the battery bit difficult, ned slowly tempted to pot it in. However, the Eve the Ministry of flashlight is easily put to.
And the battery in series parallel problem, Series current unchanged, the voltage is twice as before. Parallel voltage unchanged, the current is twice as before.
If the battery with care circuit (with anti-overcharge and over-discharge) then you do not need read the following describes as the following main explain not care circuit lithium battery.
New battery power is not too much; first use of the battery do not need charging too long, just need accordance with the charging indicator.
While Charging, depend on the charger’s charging speed, when the indicator color change immediately took out the battery, not too filling, not recommend charging time span 3-5 hours.
Fully charged, the battery should be pulled out from the charger.Select the charger, it is best to use a charger with anti-overcharge.
In use, need accordance with the torch battery voltage requirements, do not use indiscriminately, to prevent burn the torch.
In use, when the brightness of the led flashlight Earlier transition occurs is necessary to blockade the torch, to prevent over-discharge, (not the same mobile phone battery, used the phone automatically shut down, so that the battery will over-discharge, and can not be reused).
Tips: During use of the torch to ensure normal cooling , use your hand is the best style. If is stood used, recommended to lit the torch often to dispel the heat.
The torch when in use, it is recommended that blocked the torch every 30 minutes for 2-3 minutes, so can dispel the heat. hopes battery waterproof moisture resistance and other.
Electric circuit
The battery can drive straight (which is directly connect the battery two wire link to the positive and negative LED connector) to a large LED's department, but the current is the same, there is a large cause smaller shorten the LED life light failure occurs, so moderation voltage and current flashlight dedicated circuit comes out, the circuits as below.
Boost circuit. Mainly for use 1AA, 2AA battery flashlight, because the LED voltage is about 3.6, AA battery voltage 1.2-1.5, the voltage is not enough, you need the voltage to rise to 3.6 in order to make the LED work properly, it happened this circuit.
The step-down circuit. Generally used in dual lithium flashlight on, like 2x16340 flashlight, LED operating voltage of 3.6, 2 x16340 series voltage 7.5V, the circuit output voltage drops to 3.6 for LED power supply.
Automatic buck circuit. The name suggests is the output voltage drops below the operating voltage of the LED when the battery voltage is higher than the operating voltage of the LED when put hour LED operating voltage when the battery voltage is lower than the output voltage to rise to the working voltage of the LED, so it occurred to the constant pressure constant current, which is the best circuit.
LED Flashlight, reflective Cup
LED flashlight: High quality flashlight are aluminum alloy shell, almost the same material, the primary difference in the overview renew, generally the flashlight uses are popular oxidation renew, mainly black, gray. Some flashlight requires the ability to anti-wear and does not fade, it anodic oxidation, it will be no scratch even with life cutting, obviously, the price would be high.
Lamp Cup. common have orange surface cup and glossy cup, orange cups overview bump refuses to accept, is characterized by a reflective average, the irradiation spot Peugeot; glossy Cup characterized by reflection high efficiency condensing function, but also is the long-range fate, but irradiation spot outer layer aura feels perfect.
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