Shanghai led word generally not bad, don't blindly the module threw away, in fact only need to change a same value resistor can normal use. Such expenses for making unit. In order to reduce trouble, save money, had better choose installation LED the word has two big resistance modules. In addition, the suppliers to make modules of production facilities to understand somewhat, see its making module are adopted antistatic facility. If no additional antistatic facility, in use even resistance is not burned, LED lamp is very easy to be breakdown damage.
Shanghai Yichen advertising Co., LTD. Hints you:
1, buy regular manufacturers single qualified LED lamp grain, make your own module. Never covet petty gain purchase in electronic market LED single lamp has been produced good module grain or. If you need to buy module, should see a few star on the module installation, install a single resistor resistance of the module had better not use. Resistance plays in the module is the current limit function, easily fever. Long time continuous use, once resistance burnt out, this module will not shine.
2, Shanghai LED word safe use current general to 20 ma, exceed this value, although brightness increases some, but colour will obviously accelerate attenuation. So, when buying already assembled good LED module must test it when the output current value. Less than 20 ma brightness is insufficient, more than 22 ma influence life, make color attenuation LED accelerated.
3, white leds are through before delivery color spectrometer (not after spectral color LED some of the light is pure white, some issued slant blue, yellow), spectral color some expensive, general instrument without the small factory, so production equipment white are generally get plenty of color, because for spectral not spectrometer the product color won't be so carefully. Some small factory simply will not spectral color separation. They is commonly with low price to pull the customer. So white LED in the purchase of don't blindly covet petty gain, must buy the same manufacturer, the same batch, the LED with uniform number tube single grain lamp or module to make the same batches of glowing words.
4, now in the market sales light-emitting module, mostly use connect inserted wiring. So, Shanghai LED word in installing producers luminous module is easy and fast. But there have been some new problems, because plug-connecting long in use process of moisture by air to poor contact oxidation erosion caused, make the partial or total circuit instant power, resulting in font or eliminate power source spangled or not bright.
