1. plochost: hladkost povrchu obrazovky LED by měla být uvnitř (+1 mm) aby se zajistilo, že se obraz na displeji nezkreslí. local protrusion or concavity will lead to the dead angle of the visual angle of the LED obrazovka pro zobrazení videa. flatness is mainly determined by production process.
2. brightness and visual angle
the brightness of indoor full-color screen should be more than 800 cd / m2, and that of outdoor full-color screen should be more than 1500 cd / m2, tak, aby byl zajištěn normální provoz obrazovky displeje. v opačném případě, the display image will not be visible because the brightness is too low. the brightness is mainly determined by the quality of the led core.
the size of visual angle directly determines the audience of the display screen, so the bigger the better. the size of the visual angle is mainly determined by the encapsulation method of the core.
iii. white balance effect
white balance effect is one of the most important indicators of display screen. in color science, when the ratio of red, zelená a modrá je 1:4.6:0.16, pure white will appear. if there is a deviation in the actual ratio, there will be a deviation in the white balance. obvykle, we should pay attention to whether white is biased towards blue or yellow-green. the quality of white balance is mainly determined by the control system of the display screen, and the core of the tube also has an effect on the reducibility of the color.
iv. redukčnost barvy
the reducibility of color refers to the reducibility of the display screen to the color. the color displayed by the display screen should be highly consistent with the color of the playback source, tak, aby byla zajištěna pravost obrazu.
5. is there a mosaic or a dead-point phenomenon?
mosaic refers to a small square on the display screen, which is usually bright or dark. the main reason is that the quality of the plug-in program used in the display screen is not good enough.
dead point refers to a single point on an led display that is often bright or dark. počet mrtvých bodů je určován hlavně kvalitou jádra trubky.
6. colored block or not
the color block refers to the obvious color difference between adjacent modules. the color transition is based on modules. the phenomenon of color block is mainly caused by poor control system, nízká úroveň šedé a nízká frekvence skenování.
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