The "mosaic" phenomenon that appears in full-color LED displays is a problem that has plagued LED display manufacturers. Its manifestation is the inconsistency of the brightness of the display surface. From the phenomenon, the phenomenon of "mosaic" of the LED display is characterized by the brightness of the display surface, that is, the uniformity is poor. The uniformity of the LED display includes two aspects: poor brightness uniformity and poor chromaticity uniformity. The uniformity is poor, and the phenomenon of “spotted†or “mosaic†will seriously affect the viewing effect of the image. The root cause of the mosaic is caused by the consistency of the lamp itself and the consistency of the use.
What is the LED advertising screen mosaic phenomenon?
The LED module is to arrange the LEDs (light-emitting diodes) according to certain rules and then package them together, and some waterproof products are LED modules. The main viewing surface of the quadrilateral module may have a decorative structure for blurring the splicing boundaries of the module. LED module COB light source LED surface light source utility model From the perspective of vision and optics, the straight line is formed into a short line of misalignment, and the linearity of the vision is utilized. When the human eye vision is scanned from top to bottom (or moving in the left and right direction), the two positions cannot be taken into consideration at the same time. Articles, it is bound to form an infinite number of misaligned short-segment segments, thus completely eliminating the LED display mosaic phenomenon formed by the gap between the modules.
The LED module is a widely used product in LED products. There are also great differences in structure and electronics. The simple one is to use an LED board and an outer casing to form an LED module. Some of the controls, constant current source and associated thermal processing make LED life and luminescence better.
How to solve the "mosaic" problem of LED display?
The same batch of red, green, and blue LED lights are used on each LED display manufacturer, and the red, green, and blue colors of the batch of LED lights are re-filed. For the constant current device, the inter-chip binning is divided into 5 files, and the constant current source of each grade is evenly distributed to the whole screen for LED unit board production. The standard production fixture is used to ensure that the LED lights are in the same module. The same equilibrium position.
Control the mold making process to ensure that all LED lights in the module have no abnormal position in the horizontal, up and down, front and back. After filling the glue, fix the lamp with a standard front cover. Each LED unit board performs single-module brightness adjustment, that is, white balance fine adjustment to ensure uniform white balance between modules.
Assemble the modules into a box. The box body is made of steel plate rib structure and strong ribs are added at appropriate positions. Ensure the rigidity and flatness of the plane of the box. The box body stamping and bending are formed by numerical control equipment at one time, and the CNC punching machine is used to ensure the accuracy of the module installation. And have the appropriate margin to eliminate the cumulative error.
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