Projector Light Sources: Lamps, Bulbs and LED-Laser Hybrid


In the past few years, the innovations in bulbs, lamps, and Led laser hybrids as sources of light for projectors have been many. Technological uses for the projector are as many and as varied as different types are ranging from laser-powered led lights to conventional looking projector lamps. One common factor that the entire latest projectors share is the convenience, efficiency, and environmental friendliness they possess. Unlike many traditional lamps for projectors, the most recent inventions last longer than their predecessors did.

This article gives a peek preview of what to expect about projectors in the future besides give a brief description of the most popular light sources for the devices. Many of the devices we have in the market today use lamps as the source of their lights, but the future of lamps is dimming. Developed by Philips in 1995, the UHP or Ultra High-Performance Lamp is a better alternative to the Metal halide lamps that were invented in the 1960s. They last for about 3000 hours and deliver light through a combination of mercury vapor and rare earth metal salts.

The E-TORL lamp which has a lifespan of about 4000 hours is the latest invention on the scene. Due to the addition of a shade and a new design, it minimizes light leakage and diffractions; therefore, it focuses as much brightness as possible on the display. Another light source for projector lamps is LED which are technically small light bulbs that emit diodes. They are different from the ordinary light bulbs on desks because they are illuminated by th e flow of electrons, and they fit directly into an electrical circuit. Unlike regular bulbs, they last much longer, and they operate more efficiently because they do not have filaments. LEDs also consume little electricity, and they do not get very hot.

Another advantage that LEDs have is that they can instantly power off or on and are free of mercury. Some projectors in the market today do not use external light sources or lamps. Using a combination of fluorescent, laser and LED technologies the manufacturers of such projector lamps capitalize of hybrid light sources. The images such technologies produce are just as bright as that produced by other devices. The also consume far less power, are eco-friendly, and they last longer.

A typical example of the projector that uses hybrid sources of light is the 2000-3000 lumens which use a blue laser and LED. It has a fluorescent element in it that converts the blue laser light into a green light. The technology that uses hybrid light source has the advantage of giving superior color and maintaining a consistent brightness. Their lifespan extends for more than 20,000 hours. They also need no cooling period before they are plugged off, and they also reach the maximum brightness in just a few seconds. Another source of light which is envisioned for the future is the RGB laser which employs high-power blue, red and green lasers that have a combined output of 21 watts. They will have a wider color gamut, better contrasts, and higher brightness.