BenQ TK700ST - Light Source Information

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+y1+y2+z+a) hours, if:
Time used in Normal mode = x hours
Time used in ECO mode = y1 hours
Time used in ECO2 mode = y2 hours
Time used in SmartEco mode = z hours
Time used in LampSave mode = a hours
2. Equivalent Light Hour = hours
, if
X= light source life spec of Normal mode
Y1= light source life spec of ECO mode (when using Bright picture mode)
Y2= light source life spec of ECO2 mode (when using the rest picture modes)
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, Y1, Y2, Z, A
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.
For time used in each light mode shown in OSD menu:
• ECO mode and ECO2 mode are combined and displayed as ECO mode in the OSD menu. The formula is
for reference only.
• 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.


A'
X
-----

A'
Y1
-------
y1
A'
Y2
-------
y 2
A'
Z
-----
z
A'
A
-----
a++++=