Analysis of energy-saving principle of LED display

LED display of energy-saving concept quietly set off, become its most attractive to consumers eye highlights, but also in recent years, the cause of hot growth. Of course, after years of frenzied growth, the industry is now mired in a stalemate to shuffle the trap. In this dilemma, there must be many enterprises affected by this impact and the vitality of the big injury, or even bankruptcy, of course, there will be many enterprises to get out of the haze, to obtain a more long-term development. This is the industry's development law, any enterprise can not escape this catastrophe, how to respawn in the disaster, is the current concern of each enterprise.

In this era of high energy-saving calls, LED display of further energy-saving and understandable to become the industry's pursuit of support points. Many enterprises in this point on all aspects of improvement, to a certain extent, to achieve the effect of energy-saving, but to achieve greater significance of energy-saving, there is a long way to go, which requires the joint efforts of the entire industry.

Recently there are a few energy-saving LED display on the market, through the improvement of power supply to the LED display energy saving effect played a major promotion, attracted a lot of consumers attention, and gave a very high expectations, a lot of LED display manufacturers eager to introduce this technology, to obtain development opportunities. On the basis of current technology, energy-saving LED display energy-saving effect is how to achieve it?

Figure 1:led Display Basic architecture

We use a small LED module to analyze its power consumption status! 2, is a long express photoelectric launch of the CYT62726 for the drive chip led small module, its supply voltage of 5 V, first not calculate the peripheral device power consumption, because they occupy a small proportion of the entire screen, the entire screen consumes power on the lamp, First calculate the lamp point power of pled=n*uvf*iled (n is the number of channels, UVF is the voltage drop of the LED point, iled is the set current value) CYT62726 driver IC pin pressure drop is generally about 0.6V, red and green blue lamp point pressure drop is 1.8v,3.0v,3.0v so that each channel only 4V (3.0+0.6v) to work properly, Conservative point can be set to red channel 2.8V, blue-green channel 3.8V and actually our supply voltage is 5 V, is equivalent to increase the power consumption of the 1v*iled inside the IC, So as can be imagined as long as the power supply to the red 2.8V, Green 3.8V, Blue 3.8V, we can save that add on the IC channel 1v*iled power consumption, in the case of other devices will be able to achieve the LED display energy saving at least 15%, Coupled with their own LED screen cooling requirements to achieve a certain degree of energy saving, which for a large screen is already a considerable number, I believe that customers will be happy to accept!

Figure 2:cyt62726 Drive led small module

Early disassembly revealed two messages: 1,a5 's bare crystal is much larger than A4. The discovery of UBM techinsights and Chipworks shows that the A5 has a bare sheet area of 122 mm2 (12.1 mm x 10.1 mm). A4 is a mm2, that is, A5 the bare crystal area is 2.3 times times the A4.

We take a closer look at the Chipworks published A4, A5 layout, to see what is the cause of the A5 die area increased. The two arm cores of the A5 processor occupy approximately 14% of the bare-chip area and are proportional to the single-arm core on the A4

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Analysis of energy-saving principle of LED display