LCD (Non-local dimming LED) and DLP do produce 100% of the light all the time, however, plasma and LCDs with local dimming LEDs do not. Plasmas do have some (less and less, especially with the Pioneers) light emmission even when suppose to be black but we are talking very very small amount, and Local dimming LEDs are basically the same, with less light being used when not needed. LaserVue, don't know, if its always on like an LED lamp or regular lamp.
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LCD (Non-local dimming LED) and DLP do produce 100% of the light all the time, however, plasma and LCDs with local dimming LEDs do not. Plasmas do have some (less and less, especially with the Pioneers) light emmission even when suppose to be black but we are talking very very small amount, and Local dimming LEDs are basically the same, with less light being used when not needed. LaserVue, don't know, if its always on like an LED lamp or regular lamp.