LED full-color display applications are often in the state of looping video, and this dynamic display will charge the parasitic capacitance on the column or row line when the row is switched, causing some LED lights that should not be bright at the moment to appear dim. This is called smear phenomenon.
LED full-color display smear
The main causes of smear phenomenon are as follows:
① Graphics card driver problem: You can try to update the graphics card driver or reinstall the graphics card driver. At the same time, it is recommended to adjust the resolution and refresh rate, which may also be related to the response time of the LCD.
② Graphics card problem: You can try to re-plug, clean the golden fingers, and observe whether the graphics card fan is operating normally.
③Data cable problem: You need to replace the data cable to check, or check whether the data cable is bent.
④Screen cable problem: the VGA cable, check whether this cable is connected properly and whether there is any looseness. You can try a good quality VGA cable, and the VGA cable should be farther away from the power cord.
⑤Display problem: Connect the display to other normal computers. If the problem persists, it may be a display problem.
LED full-color display smear
The anti-shadow technology of the LED display screen can make the display screen more delicate, so that the screen display can reach high-definition picture quality; low power consumption can save energy during the long-term use of the LED display screen to meet the low-cost application and energy-saving environmental protection requirements; the refresh rate is The higher the display, the more stable the display, which provides technical support for fine and high-quality display, and this display effect also makes the human eye look less fatigued, and at the same time can meet the needs of high-speed shooting. It is exactly the same, which has promoted the improvement of all aspects, and has also strongly promoted the development of the entire LED display application technology.
The current erasing technology effectively eliminates the smear phenomenon. When the ROW(n) row and ROW(n plus 1) line change, the current erasing function automatically charges the parasitic capacitance Cc, when the ROW(n plus 1) row When it is turned on, the parasitic capacitance Cc will not be charged through the lamp 2, thereby eliminating the smear phenomenon.
LED full-color display smear
In order to reduce the power consumption of LED displays, low power consumption products have been introduced. By reducing the constant current inflection point voltage, the power supply voltage of the LED display is reduced. This method also reduces the power supply voltage, so the 1V resistor that must be connected in series with the red light can be omitted. Through these two improvements, low-power, high-quality applications can be achieved.
In short, whether it is the shadow elimination technology or the current elimination technology, the main function of the drive technology is to make the picture stable and clear, just like the computer graphics driver, to ensure the smooth picture quality, and finally realize the precise high-definition display of the full-color LED display.
