Disadvantages of LED video projectors

[Axeor]

Hi,
I heard that video projectors LED make their appearances with the big advantage like Very lightweight, clear, sharp image, Works very well with PC's and Macs, SD cards, digital cameras, supports a wide range of other devices, such as video iPods.

Is there any disadvantages of LED video projectors ?

Thank you

[Regina]

There are many like the brightness is not necessarily good and may also be that white light is not really white sometimes it's a little blue. There is any low-end and high end. But we should not compare the two.

[Simond]

The spectrum of some white LEDs differs significantly from a black-body radiator, such as the sun or an incandescent light. The spike at 460 nm and dip at 500 nm can cause the color of objects to be perceived differently under LED illumination than other light sources.

[N I C K]

LEDs cannot be used in applications that need a sharply directive and collimated beam of light. LEDs are not capable of providing directivity below a few degrees. In such cases LASERs (or LED lasers) may be a better option.

[N I C K]

Unlike incandescent light bulbs, which light up regardless of the electrical polarity, LEDs will only light with positive electrical polarity. When the voltage across the pn junction is in the correct direction, a significant current flows and the device is said to be forward-biased.