Why does the LED full-color electronic display appear mosaic?

Sep 29,2021| LED Knowledge

In the early years, the "mosaic" phenomenon has been a problem that plagued LED display manufacturers. From the perspective of phenomenon, the "mosaic" phenomenon of LED electronic screens is manifested in the brightness of the display surface, that is, poor uniformity. The root cause of the mosaic is caused by the consistency of the lamp itself and the consistency defects during use.

However, with the improvement of current technology, people have found a solution to the "mosaic" phenomenon. Therefore, this aspect is no longer a problem now. The LED module is a product made up of LEDs (light-emitting diodes) arranged together according to a certain rule and then packaged together with some waterproof treatment, which is the LED module. The main viewing surface of the quadrilateral module may be provided with a decorative structure for blurring the splicing boundaries of the modules.
Why does the LED full-color electronic display appear mosaic

LED module COB light source The utility model of LED surface light source starts from the perspective of vision and optics, so that straight lines form short staggered lines. Using the linearity of vision, human vision cannot take into account the two dislocations at the same time when scanning from top to bottom (or left and right). It is bound to form countless short discontinuous short line segments, which completely eliminates the LED electronic screen mosaic phenomenon caused by the gap between the modules.

LED module is a widely used product in LED products. There are also big differences in structure and electronics. The simple one is to use a circuit board and housing equipped with LEDs to become an LED module. The above control, constant current source and related heat dissipation treatment make the LED life and luminous intensity better.

How to solve the "mosaic" problem

Use the same batch of red, green, and blue LED lights on each LED display manufacturer, and re-categorize the red, green, and blue colors of this batch of LED lights. For constant current devices, the chip is divided into 5 levels, and the constant current source of each level is evenly distributed to the entire screen for LED unit board production. Standard production fixtures are used to ensure that the LED lights are in the same module. The same equilibrium position.
How to solve the "mosaic" problem

To control from the mold production process, it is necessary to ensure that all the LED lights in the module are in the same horizontal position, and there is no abnormal position before and after. After filling the glue, use the standard front cover to fix the lamp. Each LED unit board performs single-module brightness adjustment, that is, white balance fine-tuning, to ensure uniform white balance between modules.

In the above steps, if there is a deviation, the picture displayed on the screen will often be deviated. Therefore, the manufactured machine must be adjusted when the above steps are performed.

The next step is to assemble the modules into a box. The box body adopts steel plate reinforcement structure, and strengthened ribs are added at appropriate positions. Ensure the rigidity and flatness of the box plane. The box body stamping and bending are formed by numerical control equipment at one time, and numerical control punching machine is used to ensure the accuracy of module installation. And there is a proper margin to eliminate the accumulated error. If the above steps are not done wrong, then the "mosaic" problem will not exist.

  Article KeyWords:LED full-color electronic display


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