LED lamp beads common sense do you understand

One , led lamp beads classification
1 . Inline Small Power specifications: hat / helmet , round , concave, oval , Tombstone ( 2 * 3 * 4 ) bullet head , flat head, ( 3/ 5 / flat head / bread type ) Piranha etc.
2 . SMD chip is generally divided into ( 3020/3528/5050 These are positive glow ) / 1016 /1024 , etc. These are the side-emitting light.
3 . High power LED chip can not be classified into the series, they neither use the same power and current , and the optical parameters differ hugely . Single powerful LED light source without additional cooling pad ( usually hexagonal aluminum seat ) , its appearance is no big difference with the ordinary chip , high power LED light source was circular, SMD chip package with the same basic
Second, LED lamp beads common problems and solutions
1 , is the supply problems caused by abnormal :
01. Check the power supply there is no work, there is no indicator light lights up , if not light up , check the power supply is not connected ;
02 . Check whether the power cord lamp beads with positive and negative power supply connection is good, there is no inversion, if the above problem , please correct connection.
2, LED lamp beads for voltage requirements :
Nominal 3V LED lamp beads, in fact , different colors on the current also have different requirements , ** Requires current minimum, followed by red, green, white and blue . Current is too large, will wick burning.
Using 2.4V rechargeable batteries, ** easily burned , because even if the voltage is not, but the current is too large , random still burning.
When using the button batteries , button battery voltage because although is 3V, but because the button battery discharge current is small, so , 3V LED lamp beads will not be burned. Therefore, the use of LED lamp beads , it should select the appropriate power , note the voltage , as well as current.
Use power when the LED lamp beads do not meet the rated requirements, the need to improve the circuit , a common installation resistance !
3 , how to divide braid LED lamp luminous colors :
    No electricity in the case , if the time of purchase in order to facilitate the selection of the proposed prepared a 3V button battery , when used in the selection of the battery can easily check out what made LED light .
4 , high power led lamp beads burned reasons:
    01 , down two filaments , our industry is called gold , gold , and to do for conduction , two positive and two negative , really good products will be the fifth wire , welded zener on , since protective effect
    02 , shorter filament has been very clear to tell you that you have been this light burned a large current , the equivalent circuit of the
    03 , high-power 1W drive current at 350ma about working voltage between 3.2-3.6V , be sure to pay attention to when using , excessive current will burn lights
    04 , generally three 1W 12V lamp aluminum plate are driven around , there is little direct use on 220V , you see if it is less of a constant current source or a 12V drive less power ?
5, LED lamp beads yellow reasons:
    LED yellow outer sealant most likely cause of the epoxy resin and curing agent does not match the result , but we can not exclude the outer sealing plastic baking time is too long causes . Solution: Buy Complete outer sealing glue and curing agents, such as Shanghai Fine Chemical Model 800 or 2339 as the case glue will not appear , and the other focused on production management and control , operating in strict accordance with operating instructions , to avoid the baking time is too long or inadequacy this situation is very controlled ,
6, LED lamp beads leakage causes:
    Ungrounded machine equipment , personnel not wearing wrist strap ( it must be a rope ) . Caused by improper electrostatic protection . Then there are the packaging process , welding wire PAD biased, the last is the quality of the chip itself hidden problems .
7, LED lamp beads should be content, inductive load of questions:
    In fact, neither is , LED lamp beads is a two pipe , it requires a positive turn-on voltage can work , typically 2-3.5V, in addition , the current size can control the LED lamp brightness. Also said LED lamp just to convert electrical energy to light energy.
8 , with LED lights pearl decay big reason :
    Attenuation of low-power LED has four reasons:
    A : iron frame poor thermal conductivity .
    Two : Epoxy yellow .
    Three : Chip close enough contact with the bracket .
    Four : Chip attenuation .
    If it is white, there is the problem of decay phosphor .
    1000H less than 3% attenuation requirements a bit high , but not reach . Use UV resistant epoxy and phosphor, solid crystal uniformity , better chips and brackets can be achieved , primarily for the packaging material selection , process and there is no hard place .