In daily life, LED full-color display screens are widely used. Whether LED full-color display screens have energy-saving effects, we can observe through the following schemes.
1. Respond to the call of the country to save energy and reduce energy consumption;
2. Saving electricity costs and operating costs, reducing comprehensive usage costs;
3. Reduce the temperature of the display module and reduce the investment in heat dissipation equipment;
4. Reduce the power consumption of the display screen, reduce the one-time investment of power distribution cables, power adapters, and power distribution cabinets;
5. Delay the LED attenuation speed, reduce the temperature drift of the photoelectric parameters of the display, stabilize the image effect, improve the system reliability, and extend the life of the display.
Energy saving is to reduce power consumption, that is, reduce power consumption and improve energy efficiency ratio; power consumption calculation: power consumption = voltage * current, that is, P=U*I
To achieve the purpose of energy saving, it is mainly to reduce the voltage or reduce the current;
Therefore, energy saving is mainly achieved from the following aspects:
1. Unique power supply PCB circuit design to reduce the power consumption of the rich voltage;
2. Use high-efficiency LEDs to reduce LED Vf value, current consumption, and improve luminous efficiency;
3. Use high-efficiency constant current drive IC to reduce drive circuit loss;
4. The new system integration design, with automatic brightness control and other methods, improves the energy efficiency ratio of the product in an all-round way.
Use 3.8V power supply design to optimize PCB circuit, high luminous efficiency LED lights, low-voltage energy-saving driver IC (3.8V power supply), reduce the heat energy consumption of the rich voltage.
feature of product:
70% power saving ultra-low power design, minimum constant current voltage 0.15V
4 levels of programmable constant current voltage adjustable, power consumption can be set as required
Built-in FM-PWM high refresh, high gray scale, high brightness
16 gray levels, 281 trillion colors, 30n fast response, 65536 levels of excellent gray performance
Really no hidden brightness, more true colors, built-in blanking, simpler application
Adjust the brightness and change the grayscale to maintain the color temperature. 32-level micro-steps to show the global current gain
Excellent electromagnetic compatibility characteristics, low EMI, high performance
Using LED chips with high luminous efficiency and high luminous intensity, high-efficiency LEDs produced by fully automated packaging,
The comparison data are as follows:
From the above table, energy-saving LED lights have lower VF values, higher brightness, and higher energy efficiency ratios.
The basic driver IC has a VDS value of 0.7V, low conversion efficiency, only 70%, and LED brightness efficiency is only 70%;
Energy-saving products use FM-PWM technology, low loss, high refresh rate, high gray scale, high brightness drive chip, and the drive efficiency is more than 90%.
LED utilization = T(LEDLight On)/(LED Total Time)
With the same brightness, the higher the utilization rate of the LED, the lower the current required, the smaller the PeakEMI, and the lower the EMI.
3.8V power supply, the brightness remains unchanged
The brightness of the LED display depends on the size of the current. Regardless of whether it is powered by a 3.8V or 5V power supply for constant current drive products, after the drive product reaches the working voltage, the current is constant output, and the product brightness is basically the same. The display performance confirms the reliability of the 3.8V power supply.
3.8V power supply, load more
Furthermore, it is the current, not the voltage, that determines the amount of load. When the power supply voltage can ensure the normal operation of the screen, the constant current drive product is a current control product, so the load of the product depends only on the current of the power supply. The 3.8V power supply is used for power supply, and the load is more. The practicability of 3.8V power supply is proved in actual use.
3.8V power supply, more stable screen operation
Because the normal operating voltage of the LED display only needs 3.8V, the excess 1.2V voltage will be consumed by the column driver IC, which will increase its operating temperature by 15-35% and reduce its service life. At the same time, the heat is conducted to the lamp tube through the PCB board, which promotes the temperature of the lamp tube of the screen body to increase, thereby speeding up the failure time of the lamp tube during the use of the display screen. We have verified the use of 4.5V power supply to improve the reliability and stability of the LED display through the practical tests of thermal shock and high and low temperature cycle tests.
