The LED display is how energy-saving, I believe more and more people are well aware of the industry, but nothing more than highlight LED lights, driver IC, switching power supply, product design, energy-saving power system design and energy-saving design These aspects begin to implement. Indeed, how to find the best balance in these areas, we can achieve the best LED display energy saving effect. But I do not know when, do not know what is the reason, perhaps in some manufacturers consciously or unconsciously respected, the concept of high energy-saving is quietly "high brightness" fuzzy or even replaced: under the same cost, the display The higher the brightness, the more "energy saving", the more value! And has gradually become their feedback to customers the value of "cost" advantage. In fact, in order to achieve a good energy-saving goals, excessive pursuit of high brightness is contrary to the energy-saving. Let's analyze the potential relationship between "high brightness" and "high energy efficiency." At present, the more popular 12000cd / m2 high-brightness LED lights are basically using large-size LED chips. This large-size LED chip is the mainstream of the market as the majority of LED display manufacturers are generally used, there is no core technology at all. As we all know, LED screen brightness and LED lamp drive current is proportional to. 12000cd / m2 brightness is nothing more than increase the LED lamp drive current. However, the physical characteristics of LED lights will be unavoidable: high-brightness LED lamps must be accompanied by high attenuation, low stability characteristics. High attenuation is not conducive to the long-term use of LED display requirements, but also become over-pursuit of high brightness of the birth defects, and this inherent defects will be all-time, multiplier effect like damage LED screen life and picture effects. To highlight PH16mm display, for example, the technical parameters of this high-brightness LED lights show: 12000cd / m2 brightness within 1.5-2 years will be a serious decline to 8000cd / m2, the annual decline rate of 20% or more. And some irresponsible manufacturers in the publicity when the announcement of 2 years after the brightness still reached 10000cd / m2 or more, and consumers bought this screen, even two years later decay quickly, but suffer from the contract has been fulfilled, complained of no The door. In fact, consumers can use a very simple way to verify that is to look at several have been running for more than two years, and the use of more than 12 hours per day the effect of this high-brightness display. More seriously, after the brightness has been reduced from 12000cd / m2 to 8000cd / m2, its high operating current has not changed, will be more doubling the speed of its brightness decay, resulting in the latter part of the decay rate accelerated to become highly attenuated Display. And there is a vicious cycle of brightness decay, simply can not meet the requirements of long-term use. To avoid light pollution, in line with environmental laws and regulations, LED display day and night use of brightness standards are not the same. As we all know, to reduce the brightness will be more or less the loss of gray, the greater the brightness adjustment, the greater the loss of gray. Therefore, such as the LED display daytime initial brightness value is set to 12000cd / m2, to the night down to 800cd / m2 brightness, either the extreme loss of gray, making night quality becomes poor; or brightness can not be adjusted to night The use of standard requirements, and the formation of severe light pollution. Seen in this light, the market exaggerated the value of high brightness, in terms of LED display manufacturing technology does not mean that leading technology, but a serious sacrifice the life of the display in exchange for the high current and high brightness. On the contrary, people inevitably flashy, stretched out too suspicious.
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