Energy Saving LED Display
LED Display Screen is more and more popular,especially outdoor led display widely used for outdoor advertising with large led screen size, large size means high power consumption , a dozens of square meters led video wall usually reach tens of kilowatts, with numbers of led display screen increasing, energy issue is becoming more and more important for led display industry all over the world, So how to make a Lower Power Consumption Energy Saving LED Display becomes an important subject in LED display design.
A truly Energy-Efficient LED Screen, not just improvment of led screen hardware and led control software technology, but aslo the overall program on the results of led display screen innovation. For example, Outdoor P16mm 1R1G1B LED Display aim at reducing the cost of electric power, and the energy-saving efficiency reached more than 50%.
Energy Saving LED Display Features:
High Brighntess LED Low Voltage: Reliable LED Chips with Low Voltage but High Brightness to 7000-7500 Nits.
Low working Voltage: To reduce electromagnetic interference ;Adopt double circuit 2.8V & 3.8V for Modules and Control system. LINSN LED will bring you to learn more about the working principle of energy saving led screen.
1. Low Power Supply Design For LED Display Module
First,We need to know that the best working voltage of LED Lamp is about 1.8V-2.8V(Red lamp) and 2.8V-3.8V(Blue and Green lamp). However, the supply voltage provided by the traditional LED Display is much higher than its required working voltage. So it can reduce unnecessary losses after adopting the new-designed power supply.
For the Traditional LED Display, the power supply adopts a single-voltage unified power supply of 5V DC. But the energy-saving power supply is based on a dual-voltage power supply design. RED LED Chip with 2.8V DC power supply,GREEN,BLUE LED Chip with 3.8V DC Power Supply.It means the R, G, B lamp will work under its normal working voltage.
2. Different Design of PCB Board
The Energy-saving LED Display also has its own unique PCB board design, with the energy-saving power supply to achieve accurate voltage distribution. Change a words, the lamps can be swimming at the ideal work environment, the PCB equal the swimming pool and the power supply equal the water. This design can also be called “Common Cathode”.
On the contrary, normal LED Display, we call it “Common Anode”. As it uses a unified power supply design, no matter it need more or less voltage.That’s why the energy-saving led screen also called by Common Cathode Energy-Saving LED Display.
3. Different Design of Driving IC
Another indispensable element is the Driver IC. The innovation of Drive IC is mainly reflected in its low switching voltage and common cathode design, the former can save energy by 5%-8%, the latter can save energy by 20-25%.
Here we take common IC:ICN2037 and energy saving IC:ICN2049 for example.
ICN2049 is a Common Cathode Drive IC designed specifically for energy saving LED display, using 16 channels constant current output same as common IC: ICN2037. But it works at a lower and more stable voltage environment. Making the led screen to save energy effectively.
Function Contrast | ||
Item | Common IC: ICN2037 | Energy Saving IC: ICN2049 |
Output current setting range | 3～45mA@VDD=5V | 0.5～25mA×16@VDD=5V,VDS =0.3V |
Current accuracy | Between channel :< ±3.0% | Between channel :< ±2.0% |
Working Voltage | VDD=3.3～5V | VDD=2.6～5V |
>>.From this sheet, the voltage(U) of ICN2049 is lower than ICN2037. Consider both of them are constant current driver, so the current(I) is constant.
>>.At the same time, according to the data, the output current of ICN2049 is also smaller than normal IC.
>>.P=U*I, when both U & I decrease, it means that the power consumption has been greatly improved.
Above all, you will find that these design changes are mainly to reduce voltage and current, so as to achieve energy saving, lower consumption, lower temperature effect.
Energy Saving LED Display Consumption and Brightness
As shown in the testing of power consumption, the consumption of common led display is about 788KW/H per square, consumption of energy saving led display is about 487KW/H per square. It can really achieve 50% energy saving!
From the testing, the brightness of energy saving led display can reach around 6500 Nits. Same as the common led display. The voltage cut-down work didn’t reduce the brightness, on the contrary, as the unnecessary heating problem solved, the working temperature turns down, which helped to strengthen the brightness performance and the lifetime of the led display.
How to Caculate the Consumption and compare with Traditional LED Display ?
Calculate as 50sqm led screen ( Daily working time 10h，1KW = USD 0.2)
Traditional P16mm Outdoor LED Display:
Average 0.28KW/sqm
Electricity Cost 1 year：= $0.2x 0.28(Kw/m2) x 50(sqm) x 10(hours/day) x 365(days/year) = $10,220
Low-cost P16mm Outdoor LED Display:
Average: 0.12KW/sqm
Electricity cost 1 year：= $0.2x 0.12(Kw/m2) x 50(sqm) x 10(hours/day) x 365(days/year)= $4,380
The Result: Saving $10,220-4380=$5,840 annually on electricity cost for 50sqm LED Display Screen.
Now more and more led display customers prefer to purchasing low consumption led display Panel for their outdoor advertising applications,if you are looking for a large size outdoor led screen,we strongly recommend you to choose the Common Cathode Energy Saving LED Display.
Linsn LED is a leading Low Power LED Display Manufacturer in China with over 12 year experience, if you want to learn more about Common Cathode LED Screen,please feel free to contact us.
