1, LED life is short: regular manufacturers of LED production life is generally about 80,000 hours or so. And now a lot of luminous characters do not use enough to start a year to replace the LED module, to customers and ad manufacturers have brought a lot of trouble and economic losses.
Solution: the purchase of regular manufacturers of qualified LED single light tablets (need to provide manufacturers with quality parameters), their own production module. Do not invest in the electronic display market inexpensive to buy LED single light grain or have made a good module. To buy a module, you should see the module installed a few resistance, install a resistor module is best not to use. Resistor in the module is the role of limiting the flow, it is easy to heat. Long time continuous use, once the resistance burned, this module is not bright. LED lights are generally not bad. Do not throw away the module, just replace the same resistance of a resistor can be used normally. This will save money for the production unit. In order to reduce the trouble, save money, it is best to use a module with two resistors installed. In addition, it is important to know the production facilities of the suppliers who manufacture the modules to see if they have used anti-static facilities when making the modules. If there is no additional anti-static facilities, even if the resistance is not burned in use, LED lights are easily damaged by the breakdown.
2, the color decay very fast: just installed a good light to send the color pure and bright, you can use less than a year of color was clearly dim down. Make the font becomes red is not red, green is not green is very ugly.
Solution: LED lights safe use of the current is usually 20 milliamperes, more than this value, although the brightness will increase some, but the color of the attenuation will be significantly accelerated. Therefore, in the purchase of the assembled LED module must test its output current value. Less than 20 milliamperes brightness is not enough, more than 22 milliamperes affect LED life, so that color decay faster.
3, uneven color, color difference: mainly in pure white LED production of the larger luminous characters on the word. In the assembly of a single module is not obvious performance, the entire font assembly is complete, the color difference is clearly demonstrated, the entire word like a map, like a white, blue, a yellow.
Solution: white LED lights in the factory have to go through the separation of color separation (not through the color separation of the LED some of the light is pure white, some bluish, some yellow), spectrophotometer expensive , The general small factories do not have the kind of equipment, so the production of white light are generally get the manufacturers for color separation, because it is not their own products, color separation will not be so careful. Some small factories simply do not split color separation. They are generally at low prices to pull customers. So when you buy white LED do not blindly want to cheap, be sure to buy the same manufacturer, the same batch, the same color LED light tube single particle lamp or module to produce the same batch of luminous characters.
4, the font part of the stroke, the whole suddenly does not light or when the light is not bright: luminous characters in the use of a period of time after the local or the entire font light source began to flash, when the light does not shine until it is completely off. Now on the market sales of light-emitting modules, mostly using plug-in connection. In this way, the ad builder is quick and easy to install the light module. But there have been some new problems, because the plug in the course of a long period of time by the moisture in the air erosion easily lead to poor contact, so that local or all of the circuit instantaneous power or complete power, resulting in font light flicker or not bright.
Solution: a, the production module without the connector, directly connected with copper and tin wire with activated carbon solder welding. B, the use of artificial agate made of fully enclosed hollow three-dimensional luminous characters, isolated light and air contact.
5, the font output power is greater, energy saving is not obvious.
Solution: try to use a group of five lights LED light module, so that the number of lights has not changed, while the power is reduced by two-fifths.