Light Source Information - BenQ LK935 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 Dimming mode = z hours
Time used in Custom mode = a hours
2. Equivalent Light Hour =
A'
--- -
α × χ
= +
X
X= light source life spec of Normal mode
Y= light source life spec of ECO mode
Z= light source life spec of Dimming mode
A= light source life spec of Custom 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.
Extending light source life
• Setting the Light Source Mode
Go to Advanced menu - Picture > Advanced Color Settings > Light Source Mode, press OK. The
Light Source Mode page appears.
Setting the projector in ECO, Dimming or Custom mode extends lamp life.
Light Mode Description
Normal Provides full light brightness
ECO Lowers brightness to extend the light life and decreases the fan noise
Dimming Lowers brightness to offer a longer light source life
Enables the light source brightness adjustment bar so that you can adjust the
Custom
setting to your liking
• Setting Auto Power Off
52 Maintenance
α
hours
A' A' A'
--- - --- - --- -
× ×
+ +
y z
Y Z A
×
a , if