29,what is the static driver? What is the scan driver? What is the difference between the static driver and scan driver?
From the driver IC output pin to implement the pixel “point to point control” is called static drive; from drive IC output pin to implement the pixel “point to control the column” called the scanning driving, it needs the row control circuit; from the drive plate can clearly see: static drive not the need for control circuit, high cost, but the display effect is good, good stability, brightness loss is smaller; scanning drive need the row control circuit, but the cost is low, shows effect is poor, poor stability, brightness loss;

30,what is a constant current driving? What is the constant voltage driving?
Constant flow refers to the IC driver working of allows environment, the design of a constant predetermined output
current value; constant pressure refers to the IC driver
working of allows the environment, the design of a constant predetermined output voltage value;
31, what is the nonlinear Calibration?
If computer output without Verify digital signal is displayed on the LED screen will appear color distortion, so at the system control circuit, the computer will be output a signal that is via nonlinear function to counter a result, and it’s display needs.the signal will be the original computer signal output by a nonlinear function to calculate the display needs, due to the nonlinear relationship between signal, so, we often call it as nonlinear correction; due to non-linear relationship between the front and rear signals, so we often call for nonlinear Calibration;

32, what is the rated working voltage? What is the working voltage? What is the power supply voltage?
Rated working voltage refers to the voltage value during normal operation ; work with electrical voltage is within the rated voltage range, voltage value during normal operation; supply voltage divide into AC and DC supply voltage,
33,what is the color distortion?
Refer to the same object in nature and displayed on the screen, both for human sensory visual difference;

34, what is the synchronization system, what is the asynchronous system?
Synchronous and asynchronous is relative to the computer, so-called synchronization system,refers to the control system of LED display screen shows the contents and computer display the contents is asynchronous to show out. asynchronous system refers to a computer edited to display data previously stored in the display control within the system, the computer shut down will not affect the normal display LED display, this control system is asynchronous system;

35,what is the blind spot detection technique?
Through the PC software and hardware, can display the blind spot (LED open circuit and short circuit) is detected, and the formation of the report told LED screen management, so a technique called blind spot detection technique;

36, What is the power supply detection?
Through the PC software and hardware,can be detect the work status of display power supply, and the formation of the report to information of LED screen body management, so a kind of technology is called power detection technology;

37: what is the brightness detecting? What is the brightness adjustment?
Brightness brightness detection refers to the LED display locate on the environment brightness, with light sensor, will display the environmental brightness is detected, the detection method called brightness detection; brightness adjustment that refers to a LED display screen brightness, the detected data back to the LED display control system or control computer, then according to the brightness adjusting screen, called the brightness adjustment;

38: what is the real pixel? What is the virtual pixel? The dummy pixel is divided into several? What is the pixel sharing?
Real pixel refers to physical pixels on the screen and the display pixels is 1:1, display the actual number of points, how many points can only display the image information;     Refers to physically dummy pixel is the number of pixels displayed on the display and the actual number of pixels is 1: N (N = 2,4) of the relationship between the image pixels can be displayed twice or four times more than the actual pixels of the display;Virtual pixel in accordance with the virtual control can be divided into: virtual and hardware virtualization software; divided according to multiple relationship: two times and four times the virtual virtual, according to the row of lights on the way to divided into: 1R1G1B virtual and 2R1G1GB virtual;