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Energy-saving, high-efficiency, bright color, long life, easy to use, etc., for the new generation of light source LED to replace the traditional lighting in the future to create the greatest possible use of stage lighting. After the opening ceremony of the international events such as the Beijing Olympics, Guangzhou Asian Games and Shenzhen Universiade, the concentrated stage lighting effects of the staged performances were enough to surprise the heavens. In the Spring Festival Evening of 2012, a large-scale performing lighting show with LEDs was launched, and the unique stage charm of LED lighting was pushed to the general public and played to the extreme.
According to relevant practitioners, the performance of LED lamps in color is better than traditional light sources. At present, when LED is used in stage lighting, it is often used in combination with three primary color LED tubes that respectively emit red, green, and blue light, and mixed to form a white light illumination mode. Compared with incandescent lamps, LED tubes have more than twice the luminous efficiency than incandescent lamps. LEDs use a more efficient optical path design to utilize light source luminous flux with its small size and low temperature. The rate is several times higher than incandescent stage lighting. Even with the same luminous flux, incandescent lamps are several times more powerful than LED lamps. Therefore, the smaller power LED luminaires can meet the light intensity requirements required by the stage.
The optical design inside the LED is called a design, the concentrating cup is designed as a secondary design, and the combination of the concentrating cup module has been evaluated for the third time. At present, the more common LED beam lights use a dedicated collecting cup, and the LED light emitting diodes are installed in a fully transparent collecting cup. However, the LED tube and the concentrating cup are combined into one module, and the luminous flux is not enough. In this case, the solution is to combine the same modules one by one to make it a planar LED array. The light emitted by a one-hundred-watt LED luminaire is equivalent to the brightness of a few hundred watts of tungsten incandescent lamps. In this way, through a large number of LEDs, the glare that meets the needs of the stage can meet the needs of the stage application and meet the energy-saving effect.
Looking back at the color light used in previous stage lighting, it is a method of adding colored color filter paper or other color filters in front of white-emitting lamps. The disadvantage is that a large amount of unwanted color light is blocked, the emitted color light is rather weak, and because of the characteristics of the human eye, it is particularly insensitive to red and blue-violet at both ends of the visible spectrum, and a large amount of sensitive light of the human eye is blocked. The luminous efficiency of the luminaire is even lower. For example, in order to prevent the color filter from fading at a high temperature, the color filter transmits a large amount of infrared components in the spectrum, and the blue color filter transmits short-wavelength blue light, and some long-wavelength red light transmits. Therefore, the blue light obtained by the method of adding a blue color filter in front of the incandescent lamp not only has a weakened brightness, but also the color is not pure, and the actual effect is not satisfactory.
The method of obtaining blue light by adding a blue color filter to the front of the lamp is different from that of the incandescent lamp. When the LED requires a certain color of light, only the unnecessary spectrum emission is reduced, and the color spectrum of the desired spectrum is emitted. Because the blue light brightness of the LED lamp is equivalent to the brightness of the incandescent lamp with blue color paper more than ten times its power. Therefore, the color light of the LED lamp is too pure and bright in actual use. In order to reduce the saturation of the color light, some even add white LED light beads to produce a light color.
The luminous efficiency of LEDs is higher than that of incandescent lamps. The luminous efficacy of lamps is also higher than that of ordinary incandescent lamps. The efficiency of color light is much higher. Therefore, lighting designers have found that LED lamps are used for stage performance to produce the required color. Light, you can give full play to the strengths of LED.
Since the emergence of blue, white and high-brightness LEDs in the last century, their luminous efficiency has been continuously improved. The advantages of tens of thousands of hours of life, fast switching, convenient dimming, bright color, energy saving and environmental protection have begun to attract the attention of the industry. However, although LED stage lamps have shown obvious advantages in practice, they have not been popularized in stage performances. The factors come from many aspects, including: high price, single variety, and poor quality.
Even so, with the continued development of the industry, the technological leap and breakthrough, the application of the promotion, LED light efficiency is also constantly improving, prices continue to fall. The emergence of new modular dies has also led to an increase in the power of individual LED tubes (modules). Through the continuous efforts of the industry, the breakthrough of new optical design, the development of new lights, and the single product situation are expected to be further reversed. The improvement of the control software also makes the LED stage lighting more convenient to use. These gradual changes reflect the broad prospects for LED lighting applications on the stage.