Teach you how to identify the quality of LED display is good or bad
A piece of LED display quality is good or bad, for the average user does not clearly understand, under normal circumstances, the full justified by the sales staff, sometimes hard to be convincing, then teach you several identify full color display Quality is good or bad, I hope when you buy the LED display to help you.
Teach you how to identify the quality of LED display is good or bad
A good LED display can be identified mainly from the following aspects:
1. Flatness The flatness of the display must be within ± 1mm to ensure that the displayed image does not distort. Local bulges or indentions can cause dead spots in the viewing angle of the display. Between the box and the box, the gap between the module and the module should be within 1mm. Slot is too large, will lead to obvious boundaries of the display, visual uncoordinated. The quality of flatness is mainly determined by the production process.
2. Brightness and viewing angle Indoor full color screen brightness to 800cd / m2 above, outdoor full color screen brightness above 5000cd / m2, in order to ensure the normal operation of the display, or because the brightness is too low and can not see clearly Displayed image. The brightness of the display is not as bright as possible, it should match the brightness of the LED package. Simply increase the current increase in brightness, will lead to LED handsome faster than the rapid decline in display life. May require manufacturers to provide parameter reports to confirm. The size of the screen brightness is mainly determined by the quality of the LED die. (Viewing angle means that you can see the maximum angle of the entire screen content from the two measurements of the screen body. The size of the viewing angle directly determines the number of display audience, so the bigger the better. Degrees above the size of the viewing angle is mainly determined by the die package.
3. White balance effect White balance effect is one of the most important indicators of the display. Color science and technology when the ratio of red, green and blue primary colors is 1: 4.6: 0.16 will show a pure white, if the actual proportion of a little deviation will appear white balance deviation, the general should pay attention to whether the white blue, yellowish Green phenomenon. Monochrome, the difference between the brightness of the LED and the wavelength difference as small as possible, standing side of the screen to see no color or color cast, consistency is better. The quality of the white balance is mainly determined by the brightness ratio of the LED die and the control system of the display. The die also has an impact on the color reproducibility.
4. The reduction of color The reduction of color refers to the display of color reproduction, both the color of the display screen and the color of the source to maintain a high degree of consistency, so as to ensure the authenticity of the image.
5. Whether the mosaic, dead phenomenon Mosaic refers to the display appears often bright or often small black box, both the phenomenon of module necrosis, the main reason for the display used by the quality of the IC or connector but off. Dead point refers to the display of a single point of constant light or often black, the number of dead spots mainly by the quality of the die and manufacturers of anti-static measures to determine whether the sound.
6 with or without color patches is the obvious color difference between the adjacent modules, the color of the transition to the module as a result of the color block is mainly caused by the poor control system, the gray level is not high, scanning Low frequency caused.
