With the gradual maturity of the projector light market, people pay more and more attention to its luminous efficiency and projection brightness. Now let's briefly analyze the factors related to it.
1. The gobo projector lamps on the market mainly use LED as the light source, and 70% of the energy of the LED light source is converted into heat. Heat is one of the main reasons that affect the luminous efficiency and lifespan of LED light sources. In order to eliminate the negative effects of heat, the heat dissipation of the LED light source is very important. Therefore, it is necessary to rationally design the structural style and material of the radiator, the roughness of the basic contact surface between the radiator and the LED light source package, the heat dissipation surface area of the radiator, and the use of radiator plus air cooling mode and so on. The heat generated by the LED light source is taken away in time, so that the LED lamp beads are always in a suitable working temperature range, so that the heat attenuation of the light source is reduced as much as possible.
In short, try to minimize the temperature gradient difference between the LED light source substrate and the heat sink, as well as the temperature of the heat sink and the outside environment.
1. The gobo projector lamps on the market mainly use LED as the light source, and 70% of the energy of the LED light source is converted into heat. Heat is one of the main reasons that affect the luminous efficiency and lifespan of LED light sources. In order to eliminate the negative effects of heat, the heat dissipation of the LED light source is very important. Therefore, it is necessary to rationally design the structural style and material of the radiator, the roughness of the basic contact surface between the radiator and the LED light source package, the heat dissipation surface area of the radiator, and the use of radiator plus air cooling mode and so on. The heat generated by the LED light source is taken away in time, so that the LED lamp beads are always in a suitable working temperature range, so that the heat attenuation of the light source is reduced as much as possible.
In short, try to minimize the temperature gradient difference between the LED light source substrate and the heat sink, as well as the temperature of the heat sink and the outside environment.
2. The light emitted by the LED light source (or LED lamp beads) is divergent light and cannot be used directly for projection. The divergent light needs to be converged into parallel light or a beam close to parallel light (also called a light beam). It is necessary to rationally design the condensing system to condense the divergent light emitted by the LED lamp beads into a parallel light or a beam close to the parallel light. If the design of the condensing system is not reasonable enough, part or even most of the light emitted by the LED lamp beads cannot pass through the condensing system to form a beam, which will cause the light utilization rate to decrease.
When using LED lamp beads of the same power, try to choose lamp beads with a small light-emitting area. The smaller the area, the design of the concentrating system is relatively easy.
Therefore, it is necessary to properly design the condensing system so that the light emitted by the lamp beads can be condensed into an effective beam through the concentrating system as much as possible.
3. As a projector lamp, the lens is of course indispensable. The material of the lens lens, whether it is coated with anti-reflection coating, and the aperture will directly affect the gobo logo projector light effect. For example, the light transmittance of optical glass is better than that of resin lenses, and the light transmittance of coating is better than that of no coating.
The lens diameter and focal length of the projection lamp should match the condenser system. The ideal situation is to make the converged beam completely enter the lens and project it out. Although it is difficult to do in actual situations, the concentrated light should also enter the lens as much as possible.
In a word, the use of the lens should have a reasonable degree of matching with the condenser system.
The design of the LED projector light is a whole, and the lamp body size, heat dissipation method, condensing system and matching lens must be considered comprehensively to make it at a reasonable balance point, thereby improving the light efficiency utilization rate of the gobo projector lamp.
When using LED lamp beads of the same power, try to choose lamp beads with a small light-emitting area. The smaller the area, the design of the concentrating system is relatively easy.
Therefore, it is necessary to properly design the condensing system so that the light emitted by the lamp beads can be condensed into an effective beam through the concentrating system as much as possible.
3. As a projector lamp, the lens is of course indispensable. The material of the lens lens, whether it is coated with anti-reflection coating, and the aperture will directly affect the gobo logo projector light effect. For example, the light transmittance of optical glass is better than that of resin lenses, and the light transmittance of coating is better than that of no coating.
The lens diameter and focal length of the projection lamp should match the condenser system. The ideal situation is to make the converged beam completely enter the lens and project it out. Although it is difficult to do in actual situations, the concentrated light should also enter the lens as much as possible.
In a word, the use of the lens should have a reasonable degree of matching with the condenser system.
The design of the LED projector light is a whole, and the lamp body size, heat dissipation method, condensing system and matching lens must be considered comprehensively to make it at a reasonable balance point, thereby improving the light efficiency utilization rate of the gobo projector lamp.
4. Two identical projectors project at the same distance. The projected spot of the telephoto lens is better than that of the short-focus lens, and the vision looks brighter. This involves the relationship between illuminance and luminous flux. The luminous flux received per unit area is called illuminance E, and the unit is lux (Lx).
E=Φ/S, Φ is the luminous flux (unit Lm), S is the illuminated area (㎡)
In other words, under the same luminous flux, the smaller the projected spot, the greater the illuminance and the brighter the visual effect. Just like a drop of ink of the same size, the color mixed after being dropped into a glass of clear water is darker than the color after being dropped into a bucket of clear water.
E=Φ/S, Φ is the luminous flux (unit Lm), S is the illuminated area (㎡)
In other words, under the same luminous flux, the smaller the projected spot, the greater the illuminance and the brighter the visual effect. Just like a drop of ink of the same size, the color mixed after being dropped into a glass of clear water is darker than the color after being dropped into a bucket of clear water.
