LED luminous characters used in the five major common problems:
1, LED short service life: the regular manufacturer of LED's theoretical life of about 80,000 hours. And now a lot of light-emitting words not enough year to begin frequent replacement of LED modules, to clients and advertising producers have brought a lot of trouble and economic losses.
2, the color attenuation is very fast: Just installed a good light color issued by the color of pure bright, can be used less than a year of color on the obvious bleak down. Is the font is not red, green is not very ugly green.
3, uneven color, obvious color: the main performance in the production of pure white LED larger bulbs words. In the assembly of a single module performance is not obvious, the entire font assembly is complete, the color is obvious, the whole literal like a map, a white, a blue, a yellow.
4, the font part of the stroke, the overall suddenly disappeared or bright when the light is not bright: luminous characters in use for a period of time after the local or the entire font light began to flash, when the light is off, until completely off.
5, a larger font output power, energy saving is not obvious.
LED luminous characters in the use of common solutions to the problem:
1, the purchase of regular manufacturers of qualified LED single lamp (manufacturers need to provide quality parameters that), their own production module. Never try to buy cheap LED single lamp or have made a good module in the electronics market. If you need to buy the module, you should see the module installed a few resistors, the installation of a resistor module is best not to use. Resistor in the module is the role of current limiting, it is easy to heat. Continuous use for a long time, once the resistance burned, this module is not bright. LED lights are generally not bad. Do not throw away the module, just replace the resistance of the same resistance 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 the module with two resistors installed. In addition, the production facilities of the module manufacturers to have an understanding of production, to see whether the module in the production of anti-static facilities. If there is no additional anti-static facilities, in use, even if the resistance has not been burned, LED lamp can also be easily damaged by breakdown.
2, the safe use of LED light current is generally 20 mA, more than this value, although the brightness will increase some, but the color attenuation will be significantly accelerated. Therefore, the purchase of the assembled LED module must be tested when it's output current value. Less than 20 mA brightness is not enough, more than 22 mA affect LED life, so that color attenuation accelerated.
3, the white LED lights in the factory have to go through the separation of color separation (not through the separation of the color separation of the LED some light is pure white, some blue, and some yellow), spectrophotometer expensive, The general small plant does not have the kind of equipment, so the production of white light is generally get the manufacturers for spectrophotometric separation, because it is not their own plant products, spectral separation will not be so carefully. Some small plants simply do not divide the color separation. They usually pull customers at low prices. So do not blindly buy the white LED cheap, be sure to buy the same factory, the same batch, the same color LED light tube single grain or module to produce the same batch of luminous characters.
4, now on the market for the sale of light-emitting modules, most of them are connected using a patch cord. In this way, the advertiser is quick and easy when installing the lighting module. However, some new problems have arisen. Since the connector is easily oxidized due to moisture in the air during prolonged use, poor contact leads to instantaneous partial or complete power failure or complete power failure, resulting in flickering of the font light source or not bright. The solution is:
(1), when making the module do not need the connector, connect directly with the copper tin lead wire and weld it with activated carbon solder.
(2), the use of artificial agate production fully enclosed hollow three-dimensional luminous characters, isolated light source and air contact.
5, try to use a group of five LED light module, so that the number of lights has not changed, while the power is reduced by two-fifths.
LED luminous characters of the light form:
1, LED monochrome luminous characters (red, yellow, white, green, blue); 2, LED color light; 3, LED multicolor luminous characters; Variety).
LED luminous characters of the features:
1, high brightness: particularly suitable for high-rise buildings, buildings advertising, characters. 2, easy maintenance: than plastic characters, neon word maintenance and its simple. 3, energy saving: more than any one of the same brightness of the advertising words are more than 80 energy-saving.
LED light word light source selection:
LED can save a lot of power for the country and the user, to save a lot of man-hours. LED application technology, to the highly competitive advertising added a new vitality. Its unique, different light situation, is widely used in the production of advertising products. Different specifications of the LED has a different angle of light and different brightness. So, how to choose the right product for different LED, so that it can maximize the effectiveness, but also to minimize costs? Now let's take a look at the professional advice of Nanjing Biya Digital Technology Co., Ltd. LED word in the light of the application and use of attention Three-dimensional luminous word on the light source has the following requirements:
First, the LED light-shaped font complex and different projects of different specifications, requiring light source to have the versatility of not limited by glyphs;
Second, due to the installation of LED light word maintenance is extremely inconvenient, in order to reduce maintenance costs, requiring light source has a longer life expectancy;
Third, the LED light word to have enough brightness Nanjing Asia Engineering Department for the above requirements of the LED light-emitting module, with the above features. There are two types of LED light source available for lighting in the country: piranhas and straw hats. Piranha LED module for word wall height of 8-10cm between the luminous word.
In general, ¢ 3 and ¢ 5 piranha head light angle of 90 degrees and 120 degrees. In this distance used in plastic characters on the piranha light module, the light can be completely open radiation. Not only save the number of modules, the screen brightness meter test, the utilization of light intensity is just right. For the word wall is shorter, the word shaped plastic luminous characters and carved luminous characters, it is necessary to use light-emitting angle of about 160 degrees piranhas module and straw hat light module. Larger light radiation area can reduce the amount of modules, and shorter word wall and improve the font brightness. Organic combination of the two, follow the law of conservation of energy, but also reflects the importance of the correct choice of LED.
It is noteworthy that, LED light word in the use of LED light module, we must pay attention to the problem of voltage drop. Do not just do a loop, from the first tandem to the tail. This will not only make the brightness inconsistent between the first and last due to different voltage, but also lead to a single current is too large burn the circuit board problem. The correct approach is to try to connect more circuits in order to ensure the voltage and current distribution is reasonable. In addition, the interior of the word chamber for the use of anti-corrosion materials, it is best to use a white primer to increase its reflective coefficient.
The application of LED in ultra-thin signage The ultra-thin luminous signage came into being on the basis of improving the utilization of business place. The previous ultra-thin luminous signs and ultra-thin light box thickness of about 1.5-3.0cm. In 2004, Nanjing Biaoyi Company independently developed a set of ultra-thin plate with a thickness of 0.8-1.5cm on this basis. The product uses a variety of light guide, injection molding, sculpture, backlight and other technologies. Characterized by a smooth surface, no engraving bump marks, no light chromatic uniform light. Unlimited layout can be bigger and smaller, small to licensing department, to the expressway signs can be produced. This ultra-thin plate in the choice of LED, according to customer requirements of the thickness and size of the layout to choose. Thickness of 8mm below the area of ??450cm2 in the following ultra-thin light-emitting signs, optional SMD light module; thickness of 8mm-10mm, the area between 500cm2-400cm2 slim light-emitting signs, the pixel light-emitting module ; Thickness of 10mm above the large ultra-thin luminous signs, the light angle should be used within 30 degrees of ultra-bright light module.
In short, the majority of advertising colleagues in the use of LED technology to produce LED luminous characters, in addition to considering the stability of LED luminous characters, but also according to product requirements to determine the LED's lighting angle, brightness and between the tube and the tube Wavelength is allowed within the range. Only a reasonable choice of different specifications of the LED, in order to ensure product quality standards, at the same time, the cost is to minimize. Scene-oriented LED lighting system and its characteristics of the overall energy-saving and environmental protection is a universal concern in all countries today, social issues and directly affect the sustainable development of human society. The direct lighting of energy-consuming lighting industry, more hope to achieve energy-saving green lighting. The birth of semiconductor green light source hailed as a revolution in the field of lighting, the symbol of semiconductor light-emitting diode (LED) as a new light source from the special lighting market gradually into the general lighting market, the market prospects are extremely broad. As a special lighting source applications, white LED has shown great performance advantages, strong momentum of development and rapidly growing market demand. In the next five years, LED lamps are likely to become the mainstream of next-generation lighting products.
Diode light-emitting diode in terms of structure or in the principle of light, with the traditional white flag lamp is essentially different. For a long time, the reason why people do not use LEDs for lighting is mainly because LED on the one hand does not realize the red, green and blue primary colors and can not realize white light; on the other hand, the luminous intensity and luminous efficiency can not reach the illumination Claim. Now the troublesome problem has finally been solved. People use ultra-high brightness blue LED-based, using a variety of ways to achieve the white light. Has developed a white light emitting diode light bulb emits very close to the sun, has a good prospect. Because of this, LED bulbs will stand out from the traditional LED lights and become a new star in the field of lighting, leading to a new lighting revolution. Semiconductor high brightness light emitting diode (LED), especially nitride white light emitting diode, has the advantages of small size, low voltage, long life, fast response, no flicker, less energy consumption and less heat, and is gradually becoming a new generation of green , Energy saving, environmental protection, long-life lighting source.
White LED as a semiconductor light source, compared to the traditional lighting, its power consumption is only about 20% of the latter. Life of up to 100,000 hours, is a few times the ordinary lamp. It has good reliability and low maintenance cost. Operating voltage is low, the operating voltage is generally below 5V, in addition to portable LCD backlight machine, you can also use the words field lighting, remote mountain lighting, mining lights and water environment lighting. Switching time is short, the response time of up to 1 microsecond, the general lighting for a few milliseconds (the current light source response time of 200 milliseconds). Environmental protection, no mercury and other harmful waste, solid and not easy to break, reduce waste on the environment pollution. LED lights do not contain infrared and ultraviolet components, there is no radiation pollution, and DC drive, there is no strobe, is to protect the eyesight of environmental light. With the widespread use of LEDs and performance improvements, a new lighting revolution is coming to people's consensus, so what is expected of this change is to bring: This is the most concerned about the development of LED applications and guide the development of the market The problem.
