Dave Plowman (News) wrote:
In article ,
William Sommerwerck wrote:
And the same will apply to LED backlights. It's a big con that
LEDs are more efficient -- they only are where supplying narrow-
bandwidth light. As soon as you try and make them produce
continuous-spectrum light -- ie white -- the efficiency goes way
down. Of course, they may improve -- but then again, so may
fluorescent.

White LEDs are not continuous-spectrum. They contain a phosphor that
produces yellow light when stimulated by blue light.

Indeed. So not suitable for where you need a decent quality light. As for
an LCD backlight.

Be careful. A lot of backlighting technology being developed is not
based on traditional LEDS but on variations of OLED. The emission
spectra can be radically different. Not saying tis so here, but it might be.

I was briefly involved with an OLED company trying to do this sort of
thing: There are many ways, including UV-LED and phosphors..