Maximum Brightness Mode - Planar LC1502R SERIES User Manual

To change the minimum brightness limit, one of three basic methods can be used:
1. If one wishes to set an approximate minimum brightness, the above graph may be used. For
instance, to set the minimum to approximately 500 cd/m
OSD setting of 60. Note, however, that there may be significant (+/- 50%) luminance variation for a
given OSD setting due to display variation. Also note that decreasing the Minimum Brightness Limit
from its factory-set value has no effect; only increasing the limit has an effect.
2. To set the minimum brightness visually, one may set the dimming to a minimum (by covering the photo
sensor on the front of the monitor if in automatic brightness control mode, or by setting the DIM_INPUT to
5V if in manual brightness control mode) and then adjust the OSD setting to visually give the desired result.
3. To quantitatively set the minimum brightness to a desired luminance, one may set the dimming to
a minimum and then adjust the OSD setting to give the desired result as measured by a photome-
ter (such as the Tektronix J17 with a J1803 luminance head.) Note that a ten minute
monitor warm up period with the monitor set near its minimum brightness is recommended to
allow for an accurate measurement.
As with any OSD setting, a change to the minimum brightness limit will be permanently stored and
will be unaffected by turning off the monitor power.
The minimum brightness limit will affect the minimum brightness of both the automatic brightness
control mode and the manual brightness control mode identically. Below is a graph showing the
impact of various minimum brightness limit settings on the automatic brightness control mode.
Figure 4

Maximum Brightness Mode

If a constant maximum brightness is desired, simply connect both the DIM_INPUT and the /EXT_DIM
inputs of connector J1 to ground. The monitor will then be set to the maximum brightness.
2 , set the minimum brightness limit to an
LC1502R User's Guide
(020-0315-02B)
19