The use of LED flat light details

the use of LED flat light details

1 color temperature adjustment

there are so many flat lamp products on the market at present, each manufacturer of flat light have different characteristics. The color temperature of lamps and lanterns choice mostly in two ways. Lamp type is a kind of color temperature, using low colour moderate high colour temperature proportion of two groups of the brightness of the LED module for color temperature adjustment. Its advantage is colour temperature is relatively accurate, easy to use; The disadvantage is that if the color temperature will be dispatched to the highest or lowest, lamps and lanterns is only half of the LED module are in use, low brightness. Another type is a constant light color temperature. Most of the 3 200 K or 600 K.

but because manufacturers technical level is uneven, the quality of the LED module is also different. Color temperature of actual measurement and the nominal indicators tend to have about 100 K to 150 K color temperature. In actual use, the accuracy of color temperature affect the camera, large screen devices such as matching, will directly influence the rendering picture. If lamp color temperature deviation is larger, can use in Leiden to solve color paper. Assuming that large screen color temperature for 5, 800 K, and the color temperature of lamps and lanterns is 5, 000 K, simply add in Leiden 80 before light color paper to color temperature rising to 5 800 K match the big screen. If the lamps and lanterns is higher than the large screen color temperature, color temperature is used in Leiden. 85. It is important to note that any kind of color paper has an effect on the color rendering index of lamps and lanterns. So, in the plate on the choice of lamps and lanterns, early test used to select the color temperature is relatively accurate LED flat light products.

2 cast light Angle

LED flat light as surface light the best projecting Angle of 40 degrees; ~ 45 degrees; 。 The domestic many small studio in the height within 5 m, according to the situation, often projection Angle will be smaller. Usually the projection Angle, the greater the surface light stereo feeling better, facial shadow area, the greater the surface light less stray light. The camera Angle is smaller, surface light stereo feeling worse, facial shadow area is smaller, background on the stray light is more easy.

3 lighting illumination

studio light surface standards around the world still no conclusion. The European and American countries news studio around 300 lx commonly used low illumination, cooperate with the camera 2. 8 ~ 3. 0 large aperture, get background along with the depth of field is bigger picture. CCTV news programs face light reaches 1 lx 000 ~ 1 500 lx, camera aperture is 5. Around 6, get background more clear picture. The advantages of high intensity of illumination, skin and clothes details more easily.

with the development of technology, the camera tolerance in ascension, flat lamp also in improving efficacy. High and low intensity of illumination means more of the two kinds of processing is based on the needs of the subjective artistic effect. Using LED flat light lighting, surface characters of light intensity of illumination and backlight illumination light ratio is usually 1:1. 5, light surface and the background ( Large screen) The intensity of illumination light than 3:1. Also according to the specific situation to adjust the light than. 4 shading

host facial shadow has been a juicers primary focus. Reduce the shadow means mainly include:

( 1) Increase the soft light, will be more soft light qualitative change;

( 2) With more than flat light influence each other, diluent shadow;

( 3) Reduce the surface light projection Angle;

( 4) Increase eye lamp to supplement the host pouch, chin, neck light to dilute the shadow.

5 light zone control

light qualitative soft uniformity is an important characteristic of LED flat light. But its light scattering is stronger, easy to produce more stray light projected onto the background or other area, which brings the problems such as background too bright picture isn't clear. At present, the LED flat light control light area there are several kinds of methods:

use, oh for shading. Due to the flat light scattering light output characteristics, the shading effect is not very ideal.

with a different point of view in front of the honeycomb grid control light zone, a method is now more commonly used.

use black flag board keep out unwanted stray light or black paper.

with black foil paper, cut to the shape of the fixed in the front of the lamps and lanterns.

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