Lamp Life Vs Brightness setting - AVS Forum
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post #1 of 2 Old 02-17-2012, 11:20 AM - Thread Starter
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I have a few questions about how lamp brightness settings actually work in a projector:

1. When you increase the brightness from the menu, what exactly is happening? Does the lamp actually get brighter and consume more current, like increasing the voltage on a filament lamp, or is all the change happening in the LCD's and optical system?

2. Does increasing brightness settings in the eco mode shorten the life of the lamp, LCD's or polarizers at all? Is the lamp putting out more heat?

3. If you want to increase brightness in eco mode is it better to drive up brightness in the eco mode menu , or switch to normal lamp mode?
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post #2 of 2 Old 02-17-2012, 12:40 PM
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Quote:
Originally Posted by taffman View Post

I have a few questions about how lamp brightness settings actually work in a projector:

1. When you increase the brightness from the menu, what exactly is happening? Does the lamp actually get brighter and consume more current, like increasing the voltage on a filament lamp, or is all the change happening in the LCD's and optical system?

2. Does increasing brightness settings in the eco mode shorten the life of the lamp, LCD's or polarizers at all? Is the lamp putting out more heat?

3. If you want to increase brightness in eco mode is it better to drive up brightness in the eco mode menu , or switch to normal lamp mode?

Brightness and contrast are video settings, the alter how the signal is processed by the LCD panels or DLP chip, it has nothing to do with the lamp

The lamp has 2 modes, low or eco mode, uses less power and puts out less light, and High or normal, uses more power and puts out more light.
These lamps are not bulbs like in a table lamp, they are high pressure arch lamps similar to those big spot lights that light up the sky at a car dealer or that signals batman!
The lamp ages with use, and the more often you "Strike the arc (starting it up )" the faster it will degrade, or so I have read.

#3 There is only one brightness and contrast setting that is correct and a calibrations disk is used to find those settings.
To confuse matters, the brightness setting controls the Dark end of the scale, contrast controls the bright end of the scale.

So to answer your questions, you need to set the brightness and contrast correctly then figure out if you have sufficient light in eco mode, if not go to normal.
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