Problems needing attention when using LED display screen in radio and television studio

As the activity background wall, it provides a variety of vivid and dazzling background pictures and more interactive functions, which makes the background picture dynamic and static, integrates the performance and background, and perfectly integrates the atmosphere of the scene and the program, it realizes the functions and effects that are difficult to be realized by other stage art equipment. However, if you want to give full play to the advantages of LED display, you should pay attention to the following aspects in the process of selection and use.

1、 The shooting distance should be appropriate

The distance of shooting image is related to the point spacing and filling coefficient of LED display screen. The appropriate shooting distance is different for LED display screens with different point spacing and filling coefficient. Taking the LED display screen with a dot spacing of 4.25mm and a filling factor of 60% as an example, the distance between the photographed person and the screen is more appropriate at 4-10m, so that a better background picture can be obtained when shooting the person. If the character is too close to the screen, the background will have a sense of graininess when shooting close-up, and it is easy to produce reticulate interference.

2、 The point spacing should be as small as possible

Point spacing is the distance between the center points of adjacent pixels of LED display screen. The smaller the point spacing, the more pixels per unit area, the higher the resolution, and the closer the shooting distance. Of course, the more expensive it is. At present, the point spacing of LED display screen used in domestic TV studios is mostly 1.5-2.5mm. We should carefully study the relationship between the resolution of signal source and point spacing, strive to achieve consistent resolution and point-to-point display, so as to achieve the best display effect.

3、 Color temperature regulation

When the studio uses the LED large screen as the background, its color temperature should be consistent with the color temperature of the lights in the studio, so as to obtain accurate color reproduction in shooting. According to the program requirements, sometimes 3200K low color temperature lamps and sometimes 5600k high color temperature lamps are used in the studio, and the LED display screen needs to be adjusted to the corresponding color temperature to obtain satisfactory shooting results.

4、 Ensure a good service environment

The service life and stability of LED large screen are closely related to the working temperature. If the actual working temperature exceeds the specified service range of the product, not only its service life will be shortened, but also the product itself will be seriously damaged. In addition, the threat of dust can not be ignored. Too much dust will reduce the thermal stability of LED screen and even generate electric leakage, which will lead to burning in serious cases; Dust will also absorb moisture, which will corrode electronic circuits and cause some short-circuit problems that are not easy to check, so pay attention to keep the studio clean.