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Afterwards another machine carries out a test on the leds (one-by-one) in order to classify them via their BIN code and it packages them onto a reel to be later used
in the SMT machines. Then the machine applies the leds and other components such as power resistors and current stabilisers to the PCB. Once we have the
PCB completed with all the elements, it is placed into an oven to make sure that all the soldered parts between the components and the PCB are completely fixed.
Next we come to the quality process, where the strips are checked (in lengths of 50cm) with different power intensities and with white filters, in order to detect any
anomalies. Then the 50cm lengths are soldered together to make final lengths of 5m (supplied in rolls). The waterproof models are placed onto special 5m racks
and here they are treated with a layer of silicone to achieve IP65. As for the models with our Waterproof DUO system (silicone and shrink wrap tube which offer
us IP67), they will have a shrink wrap casing applied and then finished in the shrink tunnels. This system gives us IP67 protection without increasing the width of
the led strip and at the same time maintains its flexibility in 100%.
Afterwards 3M tape is placed on the back of the strips and they are placed in the AGE TESTING chamber where the final quality testing is carried out. At the end
of this process machines roll the strips onto 5m reels and then they are packaged.
Next the chips wires are soldered onto the die (at Luz
Negra we use a high purity gold wire which gives us
improved conductivity).
In order to obtain white leds we need to apply a
phosphorus layer on top of the blue led. Depending
on the composition of this phosphorus we will achieve
different tones of white.
Phosphorus is the yellow layer which we can see in the
white leds when they are turned off. If the colour is “lemon”
yellow then it will mean cold white (approx 6000°K). If it
is “orange-coloured” then it will mean warm white (approx
3000°K).
Machine soldering with gold wires
Test 1x1 placing on reel
Quality control and luminosity
Machine ”revolver” applying leds to the PCB
Placing of silicone
Drying oven for sealing soldered parts
DUO waterproofing shrink tunnels
Machine placing phosphorus in the leds
ecoled by Luz Negra
