What are the characteristics of led display drivers ?

What are the characteristics of led display drivers?

 

LED display manufacturers believe that as a green energy, energy saving is the eternal pursuit of LED display, and it is also an important criterion for considering the performance of the driver IC. The energy saving of IC drivers mainly includes two aspects: one is to effectively reduce the constant current inflection voltage, and then reduce the traditional 5V power supply to less than 3.8V; The second is to reduce the working voltage and current of the driver IC by optimizing the IC algorithm and design. At present, some manufacturers have launched a constant current driver IC with a low turning voltage of 0.2V, which can improve the utilization rate of LEDs by more than 15%. The power supply voltage is 16% lower than that of conventional products to reduce heat generation, and the energy efficiency of LED displays is greatly improved.

 

With the rapid reduction of the pixel pitch of LED display, the number of packaging devices to be installed per unit area increases geometrically, which greatly increases the density of components on the driving surface of the module. Taking the small-pitch P1.9 led as an example, a 160*90.15 scanning module requires 180 constant current driver ICs, 45 tubes, and 2 138 devices. At the same time, such a crowded arrangement of components can easily cause problems such as poor soldering, which also reduces the reliability of the module. With the reduction of power consumption of driver chips, the increase of PCB layout area and the needs of applications, driver chips should take a highly integrated technical route.

 

At present, mainstream driver IC suppliers in the industry have successively launched highly integrated 48-channel LED constant current driver ICs. Integrating large-scale peripheral circuitry into the wafer of the driver IC can reduce the complexity of the PCB design at the application side, and can also avoid problems caused by the design capabilities or design differences of engineers from different vendors.

 

In order to reduce the impact of the high-power display on the power grid at start-up, the LED electronic display power supply can be powered on in just a few steps. The fault alarm status box on the PLC control interface shows the energized status of each power supply. Alarm indicator. For displays with power consumption exceeding 10KW, a power distribution cabinet should be provided. Depending on your needs, you can choose a power distribution cabinet with remote control function or PLC control function. The power distribution cabinet equipped with PLC control function is more intelligent. You can use the LCD controller to remotely operate the air conditioner and fan switch in the led display and screen. Real-time monitoring of off-screen ambient temperature, fire, ambient brightness, and corresponding alarm information. It is recommended that in the outdoor screen project, generally due to the harsh environment, the distribution cabinet with power distribution control should be used as much as possible; Indoor led display project, the environment is good, the space is limited, and the PLC control cannot be increased.

 

The LED electronic display is also equipped with multiple smoke detectors. When there is a fire on the screen, the monitoring interface of the LCD controller will also have a corresponding prompt message, and the system will automatically power off. The LCD monitoring interface can display the real-time temperature on the display. In the automatic state, when the temperature in the screen exceeds 65 degrees, the monitoring screen will prompt that the temperature is too high, the LCD controller will alarm, and the system will automatically shut down to prevent fire.