Not long ago, it was reported that Liad assisted Zhejiang Satellite TV to create the first all-LED background news studio. This trend also shows that LED screens are more and more favored in TV studios, but the TV screen is used in the process of LED screen use. The effect is very different, and some of the pictures are bright, clear and stable from beginning to end; some are small and indistinct when viewed from a distance. This requires us to pay attention to several issues in the selection and use of LED screens.
1. The shooting distance should be appropriate
As mentioned before about the dot pitch and fill factor, the appropriate shooting distance for LED screens with different dot pitch and different fill factors is different. Taking an LED display with a dot pitch of 4.25 mm and a fill factor of 60% as an example, the distance between the person being shot and the screen is more appropriate at 410 meters, so that when shooting people, you can get a better background picture. If the person is too close to the screen, when shooting a close-up, the background will appear grainy, and it is also easy to produce moire.
2. Dot spacing should be as small as possible
The dot pitch is the distance between the center points of adjacent pixels of the LED screen. The smaller the dot pitch, 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 dot pitch of LED screens used in domestic TV studios is mostly 68 mm. It is necessary to carefully study the relationship between the resolution of the signal source and the dot pitch, and strive to achieve consistent resolution and achieve point-to-point display, so as to achieve the best effect.
3. The color temperature should be adjusted
When the studio uses the LED screen as the background, its color temperature should be consistent with the color temperature of the lights in the studio to obtain accurate color reproduction in the shooting. According to the needs of the program, the lighting of the studio sometimes uses 3200K low color temperature lamps and sometimes 5600K high color temperature lamps. The LED display screen needs to be adjusted to the corresponding color temperature to obtain a satisfactory shooting effect.
4. Ensure a good environment for use
The life and stability of the LED screen are closely related to the operating 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 severely damaged. In addition, the threat of dust cannot be ignored. Too much dust will reduce the thermal stability of the led screen or even cause electrical leakage. In serious cases, it will cause burnout; dust will also absorb moisture, which will corrode electronic circuits and cause some short-circuit problems that are not easy to troubleshoot.
The LED screen has no stitching, which can make the picture more perfect; lower power consumption, less heat, energy saving and environmental protection; it has good consistency, which can ensure the indiscriminate display of the picture; the small size of the cabinet is convenient for the background screen to form a smooth shape ; Color gamut coverage is higher than other display products; It has the advantage of better weak reflective characteristics, and has high operational reliability and low operation and maintenance costs.
Of course, LED screens with so many advantages must also be used well in order to make its advantages fully manifest. Therefore, when using LED screens in TV programs, we must select the appropriate LED screens, understand their characteristics in depth, and select technical products as the background for different studio conditions, program forms and requirements, so that these new technologies can maximize their use. Advantage.
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