In today's era of information explosion, product diversification, each business owner is looking for a way to quickly open up sales, quick benefits. Led advertising car mobility, can shuttle to the streets, plus two-way propaganda screen and voice to ensure that the ad's publicity, more easily accepted by the majority of consumers and other characteristics by everyone's favorite. Then led advertising car purchase need to pay attention to what it is.
Led advertising car is the core of the screen, the following teach you to distinguish the quality of led advertising car screen.
Flatness
The surface flatness of the display should be within ±1mm to ensure that the display image does not distort, and local raised or recessed leads to a blind angle in the viewing angle of the display. The flatness is mainly determined by the production process.
2. Brightness and viewing angle
The brightness of indoor full-color screen should be above 800cd/m2, and the brightness of outdoor full-color screen should be above 1500cd/m2 to ensure the normal operation of the display screen. Otherwise, the displayed image may not be seen because the brightness is too low. The brightness is mainly determined by the quality of the LED die.
The size of the viewing angle directly determines the number of display audiences, so the bigger the better. The size of the viewing angle is mainly determined by the packaging method of the die.
3. White balance effect
The white balance effect is one of the most important indicators of the display. In color science, when the ratio of the three primary colors of red, green, and blue is 1:4.6:0.16, pure white is displayed. If the actual ratio is slightly deviated, there will be a white balance deviation. Generally, it should be noted whether the white color is bluish or yellowish. Green phenomenon. The quality of white balance is mainly determined by the display's control system, and the die also has an impact on the reproducibility of color.
4. Reducibility of color
The reproducibility of color refers to the reproducibility of the display screen to color, and the color of the display screen must be highly consistent with the color of the playback source, so as to ensure the realism of the image.
5 there is no mosaic, dead point phenomenon
Mosaic refers to the light or dark four squares appearing on the display screen. This is due to the necrosis of the module. The main reason for this is that the quality of the connectors used in the display is not critical. The dead point refers to the single point of the light or darkness that appears on the display screen. The number of dead spots is mainly determined by the quality of the die.
6. There is no color block
The color patches refer to the obvious color difference between adjacent modules. The color transition is based on the module. The color patching phenomenon is mainly caused by poor control system, low gray level, and low scanning frequency.
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