In recent years, the performance of LED display screens has developed rapidly, and the level and maturity of LED display screen equipment has become higher and higher, and the scope and content of LED display screens have become more extensive. On the stage of the TV art program, represented by CCTV Spring Festival Evening, the most eye-catching should be a variety of LED display screens. They are based on carefully crafted pictures and dynamic video images. They are seamlessly stitched together from the top, bottom, left and right directions of the stage to form a perfect stage space, complemented by hundreds of mechanical lifting stages, which inventors The planning scope has been further expanded from the original stage, which has truly made the points, lines and faces on the stage become an integral part of the art of performing dance. Cooperation and augmented reality skills have created a real and illusory artistic air for the audience. It has brought great impact and enjoyment to the audience visually.
How to make the stage led display and lighting perfectly combined?
However, the large-scale use of LED large screens has also brought about some suffocating effects on the artistic invention of stage lights. We summed up the effects of these helium, and found out how to properly use the LED large screen, so that the lights and LED big screen perfectly combined and complement each other.
One: the impact of hernia
LED screen stage planning example:
(1) The stage of many evening parties is, to a certain extent, a big box that will shine. The high brightness (although it can be adjusted), the high color temperature and the rich color are unprecedented. The stage light, especially the face of the characters, is more difficult to blend with. It often appears that the scenery is too bright and too prominent, which makes the appearance of the person's face illuminate, the face is gray, and the picture is not transparent.
(2) On the traditional stage, the empty black part left by the dance scene is played by the light to further invent, or the combination of bright or dark lights and bright set shapes is a combination of true and false, mutual benefit The connection, from the point and the line to the surface, the sense of space is full. On the other hand, the stage of some of today's parties, all of which are all LED display screens, although the picture is beautiful, but the feeling is too "full", too "blocking", and even give people a sense of oppression. And once some of the pictures are black, it does not give the lights a satisfactory position and space to make up for it. In a sense, this in itself violates the rules of the dance plan.
(3) The pattern of the LED screen is often in conflict with the beam, pattern and color of the computer light. As far as CCTV's current practice is concerned, it is all about the role of the light itself to ensure the LED picture.
Two: the solution
(1) First of all, to change the lighting plan concept in the traditional TV lighting manufacturing, reflecting the contrast of the brightness of the object, the camera will restore the brightness of the object being photographed; the illumination and the illuminance reach the requirements, then the picture level, color, clarity Can reach the satisfaction. After the LED large screen is used as the primary scene in the TV variety show, the lighter must take into account its self-illumination characteristics when planning, as a large LED light fixture, because its video content is different, its light and dark The color also has different changes. Under the premise of not affecting the beauty of the dance and ensuring the illumination of the base, the lighting layout is constantly adjusted. It is necessary not only to properly use the brightness and light ratio of the lights, but also to manipulate the level contrast between the artist and the scene. The artist and the LED display screen balance the brightness, master the overall color change of the stage; make the color temperature tone of the party light and the content reconcile together, let the LED big screen completely integrate into the TV stage, seamlessly with the TV lights, let the TV picture get real and natural The color is restored.
(2) Secondly, adjust the light ratio, aperture, color temperature, video
①The dimming ratio can reduce the light ratio of the face to the scene by adding the brightness of the person in the stage performance area or reducing the brightness of the large screen.
②Fixed aperture During the practice of recording rehearsal, the lighter and video skill personnel will first determine the aperture size of the base according to the shape of the program. This scale must always ensure the best working condition of the camera, that is, between F4 and F5.6. In this aperture scale, the base lighting arrangement required by the camera is completed, the brightness of the LED large screen is determined, and the artistic decoration of the computer light and the function light is performed. In this way, the video skills of each program can adjust the aperture on a small scale to ensure the visual effect and skill quality requirements.
③Balanced color temperature is now popular with computer lights for surface light, that is, the use of high color temperature lamps. Since the LED large screen is a high color temperature device, if the computer lamp uses a low color temperature lamp of about 2800 K to 3200 K, the exposure of the face is based on the exposure, and the large LED screen that appears is blue, which causes color distortion; The light is adjusted to a high color temperature luminaire, which together with the large screen behind, can make the picture appear common.
④The information displayed on the 4LED large screen can be adjusted moderately. Due to the use of large-scale LED screens, the brightness will directly affect the stage lighting. At the beginning of the lighting project, we were able to consider the LED large screen as part of the stage lighting. Measure the uniform brightness of all the broadcasted materials, modify and adjust the brightness and color of the video images of the broadcasted materials beforehand, and adjust the sounds according to the set data of the practical programs and the lighting planning requirements, without affecting the overall effect of the large screen. Brightness, and the amount of light is calculated into the base illuminance of the light, and the content of the large screen broadcast data is considered as part of the lighting plan, which can also minimize the impact of the large screen on the lighting and camera aperture control.