High Flatness for Seamless Splicing
Pixel pitch, resolution, luminance, and cost are probably the first things one would consider when one is evaluating LED displays. Surface flatness of the display is another crucial but generally not considered aspect, however. Flatness has a direct impact on the visual quality of the output, maintaining stable even images, colors, and optimal view experience. Conventional LED screens tend to have a flatness tolerance of between 0.1mm and 0.3mm, but fine-pitch LED screens require an even harsher flatness tolerance of less than 0.1mm. Smaller deviation in flatness means the picture is flatter with similar colors and provides a clearer view, while higher deviations lead to image distortion and color instability.

Calibration for Improved Display Quality
Calibration is needed in order to precisely calibrate LED displays for grayscale, chromaticity, and brightness levels. After calisbration, the colors become more natural and the whites are mirror-smoothly bright. But at the cost of something — a cost one pays, brightness is lowered by approximately 10%. Even this sacrifice is bound to go unnoticed under direct sunlight in an external environment, but enhances vision quality greatly for night or internal use applications. Calibration is thus a necessity to create high-quality uniform image.

Removal of Moiré Patterns from LED Displays
Moiré effects are high-frequency interference patterns created when a scanner or digital camera comes into contact with fine details on an LED screen. They are unwanted effects that can detract from the quality of captured images and video content. In order to undo or avoid moiré effects while taking pictures, various methods can be employed:
1. Tilt the Camera Angle – Gentle tilt of the camera will alter the sensor to LED grid ratio, thus reducing moiré effects.
2. Move the Camera Position – Restating the camera position in the up, down, or side will help modify the angle relationship and reduce interference.
3. Move the Focus – Out-of-focus, slightly blurred images will reduce moiré by concealing sharp, over-defined detail.
4. Shift the Focal Length – Modification of the lens or focal length can be utilized to modify the interaction between the camera sensor and the pattern on the LED display.
5. Increase the Refresh Rate – Use of LED displays with a refresh rate of 3840Hz or more reduces moiré interference significantly.

With higher flatness, accurate calibration, and minimized moiré effects, LED displays are able to provide excellent image quality, and therefore become the first choice for high-end advertising, broadcasting, and event staging applications.