Short LED life
The theoretical service life of LEDs produced by regular manufacturers is generally about 100,000 hours. Nowadays, many luminous characters have not used enough for a year, and the LED modules are frequently replaced, which has brought a lot of trouble and economic loss to customers and advertising producers.
Solution: buy qualified single LED lamp pellets produced by regular manufacturers (the quality parameter description provided by the manufacturer is required), and make the modules by yourself. Don't try to buy a single LED lamp pellet or a finished module in the electronic display market cheaply. If you need to buy a module, you should see how many resistors are installed on the module. It is best not to use a module with one resistor. The resistor plays a current limiting role in the module, and it is easy to generate heat. After a long time of continuous use, once the resistor is burned out, this module will not light up. LED lights are generally not broken. Don't throw away the module, just replace a resistor with the same resistance value and it can be used normally. This can save money for the production unit. In order to reduce trouble and save money, it is best to choose a module with two resistors installed. In addition, it is necessary to understand the production facilities of the supplier that makes the modules to see if they use anti-static facilities when making the modules. If there is no additional anti-static facility, even if the resistance is not burned out in use, the LED lamp is easily damaged by breakdown.
LED display
The color decays very fast
The color of the newly installed luminous characters is pure and bright, and the color is obviously dimmed after less than a year of use. It is very ugly to make the fonts red and not red, green and not green.
Solution: The safe use current of LED lights is generally 20 milliamperes. If this value is exceeded, although the brightness will increase a little, the color attenuation will be significantly faster. Therefore, when purchasing an assembled LED module, be sure to test its output current value. The brightness below 20 mA is not enough, and the brightness above 22 mA affects the life of the LED and accelerates the color decay.
Uneven color, obvious color difference
Mainly manifested in the larger luminous characters made of pure white LED. When assembling, the performance of a single module is not obvious. After the entire font is assembled, the chromatic aberration is obvious. The entire text is like a map, one piece of white, one piece of blue, and one piece of yellow.
Solution: The white LED lights must undergo light separation and color separation before leaving the factory (the light emitted by some LEDs that have not undergone light separation and color separation is pure white, some bluish, and some yellow), and the spectrophotometer is expensive Generally, small factories do not have this kind of equipment, so the white light produced is usually obtained by large factories for light separation and color separation. Since it is not a product of our own factory, light separation and color separation will not be so careful. Some small factories simply don't separate light and color. They generally attract customers at low prices. Therefore, when buying white LEDs, do not blindly try to be cheap. Be sure to buy LED light-emitting tube single-particle lamps or modules of the same manufacturer, batch, and color number to make the same batch of luminous characters.
LED display
The whole is suddenly off or off from time to time
After using for a period of time, the luminous characters start to flicker in part or in the whole font light source, and they will not light up at all times until they are completely off. Most of the light-emitting modules sold on the market are connected by patch cords. In this way, it is convenient and quick for the advertisement maker to install the light-emitting module. However, some new problems have also appeared. Because the connector is eroded by moisture in the air during long-term use, it is easy to oxidize and lead to poor contact, which causes partial or all circuits to be powered off instantaneously or completely, causing the font light source to flicker or not bright.
Solution: a. No connector is needed when making the module, directly connect with tinned copper wire and then solder it firmly with activated carbon solder. b. Use artificial agate to make fully enclosed hollow three-dimensional luminous characters to isolate the contact between the light source and the air.
The font output power is large, and the power saving and energy saving are not obvious
Solution: Try to use LED light-emitting modules in a group of five lights, so that the number of lights remains unchanged, and the power is reduced by two-fifths.
