Why the LED display brightness is not consistent?

And the LED display is rising in such demand, now the streets can see the LED display, mainly or it is really convenient, stable, you can change the content at will, can be used in a variety of occasions.LED display basically get rid of the traditional advertising way, but the LED display has obvious disadvantages, that is, it is easy to blind lights and brightness is not consistent and other faults,Most of these failures are related to the manufacturer's technology, and also to the working environment of the LED display screen.To some extent, the most important thing is to check the display manufacturers use the light-emitting components and drive components.

So is there a way to avoid the problem of inconsistent brightness of LED tubes?Why to avoid as far as possible, in fact, because the technical level is limited, can not reach the absolute degree of precision, so in the production process of brightness is not consistent is inevitable.At this stage, most manufacturers take countermeasures are in the production after the completion of the classification, that is, the two adjacent levels of the smallest brightness difference put together, in this way, can slightly adjust the consistency of LED brightness.The biggest disadvantage of taking such a way is that the rate of finished products will be very low, not matching more will cause more inventory, which is actually not conducive to long-term development, so the general manufacturer will control the brightness difference at about 20%.

The driver components used in LED display are basically constant-current driver chips, such as the driver components are generally constant-current driver chips, such as MBL5026, LD1018, etc.These chips contain 16 constant-current drive outputs, and the current output value can be set by resistance. The output error of the same chip is controlled within 3%, and that of different chips is controlled within 6%.