KTV stage lighting effects have become a major highlight of KTV. Below we will introduce the types and methods of KTV stage lighting control.
1. The method of KTV lighting control stage lighting
①. Electrical control method, that is, using various dimmers to change the working voltage or current of the lamps, thereby adjusting the luminous intensity of the lamps.
②. Mechanical addition and subtraction, that is, by controlling the number of lighting lamps to increase or decrease the total luminous intensity.
For a single lamp, a shading plate or an iris diaphragm can be used to change the amount of light transmitted by the lamp.
These two methods have their own characteristics. The advantage of the mechanical addition and subtraction method is that it will not affect the color temperature, but the adjustment is not convenient enough. The electrical control method is simple to operate, and can realize automatic and program-controlled operation. Its disadvantage is that the color temperature and color rendering will change greatly while changing the luminous intensity.
2. From the perspective of the electrical control principle of lighting, it can be summarized into two types: on-off control and luminous intensity control. Correspondingly, there are two methods of switch control and dimming control.
①. Dimming control
Dimming control usually changes the magnitude of the current or voltage passing through the lamp to continuously adjust the brightness of the lamp. According to the dimming method, there are: variable shader dimming, autotransformer dimming, saturated choke coil dimming, magnetic amplifier dimming and thyristor dimming, etc.
The first four dimming devices all have disadvantages such as bulky and heavy. Thyristor dimmers are widely used at present.
②, switch control
Lighting switch control equipment refers to various switching equipment that controls the on and off of lighting circuits, that is, controls the ignition and extinguishment of lamps, including switches, contactors, and air switches.
Among them, the air switch is widely used as the on-off control of high-power lamps in dance halls and the main switch of lighting because of its good protection function. http://www.mc-f.com.
It is the most common manual (artificial) switch control device to control the light on and off by using a toggle switch (or a general-shaped switch) or an air switch. For example, the HDL 11012 12-circuit switch board is composed of 12 groups of 15A general-shaped switches and fuses, which can control 12 lights separately.
It is suitable for lamps with current less than 15A, such as various rotating lights, strobe lights, purple lights, laser lights, glass balls and most lens action lights. For high-power spotlights, floodlights, and follow-up lights, it is suitable to use DZ type air switch or CJ10 type contactor with strong arc extinguishing ability.
Because dance halls need to display colorful lighting art effects, in addition to manual switch devices, switch control devices with various special functions such as sound control (voice control), program control (program control) and even computer control are also used.
Sound-activated lighting equipment can make the lights flash, swing or rotate with the beat of the music. There are two ways of sound control of lights: one is that the lamps have voice control function. The lamps are equipped with microphones, amplifiers, relays or thyristors (thyristors), which directly feel the sound of the outside world and control the motor action, driving the lamps to scan, swing or actions such as rotation. The other is that the light console itself has a voice control function. The principle is to send the sound signal from the mixer to the voice control circuit of the light console (dimming console) to control the on and off of each group of lights.
This method is especially suitable for controlling the actions of a large number of grouped rain lights, so that they are ignited in turn with the beat of the music, resulting in colorful flashing effects.
The program-controlled lighting control equipment uses light-touch buttons to trigger the on-off of the thyristor through the digital control circuit, so as to control the lighting and extinguishing of the grouped lamps in turn according to a certain program, thereby producing a certain artistic effect. It is especially suitable for lamps such as rain lights, spot lights and boundary lights that need to be continuously switched on and off in order to achieve continuous changing of colors, patterns and effects.