In the outdoor advertising market, LED large-screen advertising has become an important part of outdoor advertising communication because of its strong relevance to the target consumer groups, strong visual impact, strong advertising updates, low cost per thousand, and high audience coverage. media.
LED display four advantages
1. Area ductility, large lcd area is difficult to achieve seamless splicing, LED display can be arbitrarily extended, and seamless splicing.
2, lcd plasma screen luminous flux attenuation is very fast, generally run about one and a half years, you need to replace, but the LED display under the same operating conditions for at least five years no problem.
3, LED brush screen machine can use interactive technology to enhance the interaction between the screen and the advertising audience, such as custom touch screen, cloud technology broadcast management.
4. In terms of display effect, the high brightness of the LED display screen, the wide viewing angle and the good color reproduction ability are also superior to the lcd screen. LED brush screen machines are generally used in airports, shopping malls, hotels, high-speed rail, subway, cinema, exhibitions, office buildings, etc., target customers have strong spending power and have huge advertising value.
Outdoor LED display purchase quality identification
Professional development, design, strict production management, enterprise selection from components and materials, from advanced automated operation machinery to strict quality control of production process (including aging treatment of intermediate parts), each link affects LED display The quality of the screen.
1. Flatness The surface flatness of the LED display should be within ±1mm to ensure that the displayed image is not distorted. Local bumps or recesses may cause the viewing angle of the display to appear dead angle. The quality of the flatness is mainly determined by the production process.
2. Brightness and viewing angle The brightness of the indoor full color screen should be above 800cd/m2, and the brightness of the outdoor full color screen should be above 1500cd/m2 to ensure the normal operation of the display. Otherwise, the brightness will be too low to see clearly. The image displayed. 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 primarily determined by the way the die is packaged.
3. White balance effect White balance effect is one of the most important indicators of the display. In color theory, when the ratio of the three primary colors of red, green and blue is 1:4.6:0.16, pure white will be displayed. If there is a slight deviation in the actual ratio, the deviation of white balance will occur. Generally, it should be noted whether white is blue or yellow. Green phenomenon. The quality of the white balance is mainly determined by the control system of the display, and the die also has an effect on the color reproduction.
4. The reductive color reproduction of the color refers to the reproduction of the color of the display screen. The color displayed on the display screen should be highly consistent with the color of the source, so as to ensure the realism of the image.
5. Whether there is mosaic or dead point Mosaic refers to the always-on or often black small four-squares appearing on the display screen. The module is necrotic. The main reason is that the quality of the connector used in the display is not good.
Dead point refers to a single point that is always bright or often black on a full-color LED display. The number of dead points is mainly determined by the quality of the die.
6. The presence or absence of color block means that there is a significant color difference between adjacent modules, and the color transition is in units of modules. The phenomenon of color block is mainly caused by the poor control system.
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