With the development of LED display technology, LED display is being used more and more in TV studios and TV broadcast large-scale events, as an activity background wall, it provides a variety of vivid, beautiful background picture and more interactive functions, so that the background picture is also moving and quiet, so that the performance and background are integrated, and the atmosphere of the scene and the program is perfectly integrated. It achieves functions and effects that are difficult to achieve with other stage art equipment. However, in order to play the advantages of LED display, the following aspects should be paid attention to in the selection and use process.          
 

First, the shooting distance should be appropriate: the distance of the shooting image and the LED display point spacing and filling coefficient, different point spacing, different filling coefficient of the LED display, the appropriate shooting distance is not the same. Taking the LED display with a point spacing of 4.25mm and a filling factor of 60% as an example, the distance between the person being photographed and the screen is 4-10 meters, so that you can get a better background picture when shooting the person. If the character is too close to the screen, when shooting close-range, the background will appear grainy, and it is easy to produce mesh interference.

 

Second, the point spacing should be as small as possible: the point spacing is the distance between the center points of adjacent pixels of the LED display. The smaller the point spacing, the more pixels per unit area, the higher the resolution, the closer the shooting distance can be, of course, the more expensive the price. At present, the point spacing of the LED display used in the domestic TV studio is mostly 1.5-2.5 mm, and the relationship between the resolution of the signal source and the point spacing should be carefully studied, and the resolution should be consistent to achieve point-to-point display, so as to achieve the best display effect.

 

3, color temperature adjustment: When the studio uses the LED screen as the background, the color temperature should be consistent with the color temperature of the studio light in order to get accurate color reproduction in the shooting. The lighting of the studio according to the needs of the program, sometimes use 3200K low color temperature lamps, sometimes use 5600K high color temperature lamps, and the LED display needs to be adjusted to the corresponding color temperature, so as to obtain satisfactory shooting results.

 

Fourth, ensure a good use environment: the life and stability of the LED screen are closely related to the working temperature. If the actual operating temperature exceeds the specified range of use of the product, not only its life will be shortened, but the product itself will also be seriously damaged. In addition, the threat of dust cannot be ignored. Too much dust will reduce the thermal stability of the LED screen and even generate leakage, which will lead to burnout in serious cases. Dust will also absorb moisture, which will corrode electronic wiring, causing some short circuit problems that are not easy to troubleshoot, so pay attention to keep the studio clean.

 

LED display without patchwork, can make the picture more perfect; Lower power consumption, less heat, energy saving and environmental protection; It has good consistency and can ensure the undifferentiated display of the picture; Small size of the box, easy to form a smooth shape of the background screen; Color gamut coverage is higher than other display products; It has the advantage of better weak reflection characteristics, high operational reliability and low maintenance costs.

 

Of course, the LED display with so many advantages must also be used well in order to make its advantages fully manifested. Therefore, in the use of LED display in TV programs, we must choose the appropriate L-point spacing, in-depth understanding of their characteristics, for different studio conditions, program forms and requirements to select technical products as the background, so that these new technologies to maximize their role.