Light Source Information - BenQ TK700 Series User Manual

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+a) hours, if:
Time used in Normal mode = x hours
Time used in ECO mode = y hours
Time used in SmartEco mode = z hours
Time used in LampSave mode = a hours
2. Equivalent Light Hour =
A'
--- -
= +
X
X= light source life spec of Normal mode
Y= light source life spec of ECO mode
Z= light source life spec of SmartEco mode
A= light source life spec of LampSave mode
A' is the longest light life spec among X, Y, Z, A
For time used in each light mode shown in 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 in
OSD menu since projector system calculates time used for each light mode in "Minutes" then rounds down to an
integer in hours shown in OSD.
To obtain the light hour information:
Go to Advanced menu - System > Light Source Information and press OK. The Light Source
Information page appears.
You can also get the light hour information on the Information menu.
hours
A' A' A'
--- - --- - --- -
+ +
y z
Y Z A
a , if
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