43 Maintenance
Light source information
Getting to know the light hour
When the projector is in operation, the duration (in hours) of light source usage is automatically
calculated by the built-in timer. The method of calculating the equivalent light hour is as
follows:
1. Light Usage Time = (x+y+z) hours, if
Time used in Normal Mode = x hours
Time used in ECO Mode = y hours
Time used in Dynamic Mode = z hours
2. Equivalent Light Hour = hours
, if
X= light source life spec of Normal Mode
Y= light source life spec of ECO Mode
Z= light source life spec of Dynamic Mode
A’ is the longest light life spec among X, Y, Z.
To obtain the light source hour information:
Go to the Advanced menu - System > Light Source Information and press OK. The Light
Source Usage Time information is displayed.
You can also get the light source hour information on the Information menu.
Extending light source life
• Setting the Light Source Mode
Go to the Advanced menu - Game & Pic. > Advanced Color Settings > Light Source Mode and
select a suitable light source power from among the provided modes.
Setting the projector in ECO Mode, or Dynamic Mode mode extends light source life.
For time used in each light source mode shown on OSD menu:
• Time used is accumulated and rounded down to an integer in hours.
• When time used is less than 1 hour, it shows 0 hours.
When you calculate Equivalent Light Hours manually, it will probably have deviation from the value shown
on OSD menu since projector system calculates time used for each light source mode in “Minutes” then
rounds down to an integer in hours shown in OSD.
Light mode Description
Normal Mode Provides full light source brightness.
ECO Mode Lowers brightness to extend the light source life and decreases the fan noise.
Dynamic Mode
Adjusts the light source power automatically depending on the content brightness
level while optimizing display quality
Some of the above light mode(s) may not be available under certain circumstances.
A'
X
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A'
Y
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y
A'
Z
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z++=
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