Shenyang Torch-Bigtide Digital Technology Co. Ltd. 19LCD1928M User Manual
Last change:
2012-3-1
2012-3-1
User Manual
HL1928M-L/R
Page 17 of
32
Fine adjustment of the flat panel display
Note
Fine adjustment of the flat panel display can only be carried out via the analog
port. The digital input (DVI-D,) does not require a fine adjustment since the
display signal is always optimum.
port. The digital input (DVI-D,) does not require a fine adjustment since the
display signal is always optimum.
RGB picture sources via VGA connector supply analog signals which are
basically intended for conventional CRT monitors and which are processed
directly by them.
basically intended for conventional CRT monitors and which are processed
directly by them.
In contrast, the analog signals must be converted for a flat panel display into
digital signals by a video digitizer. Depending on the picture source, cable length
and video mode (e.g. VGA, SVGA, XGA) this conversion may cause certain
deviations which cannot be corrected fully automatically by the flat panel display.
A manual fine adjustment is therefore necessary during which the flat panel
display (or, more precisely, the video digitizer) is matched to the respective
video source. The fine adjustment comprises e.g. setting the horizontal/vertical
picture position and the picture sharpness. This can be carried out for the flat
panel display HL1928M using an OSD menu.
digital signals by a video digitizer. Depending on the picture source, cable length
and video mode (e.g. VGA, SVGA, XGA) this conversion may cause certain
deviations which cannot be corrected fully automatically by the flat panel display.
A manual fine adjustment is therefore necessary during which the flat panel
display (or, more precisely, the video digitizer) is matched to the respective
video source. The fine adjustment comprises e.g. setting the horizontal/vertical
picture position and the picture sharpness. This can be carried out for the flat
panel display HL1928M using an OSD menu.
To optimize the display settings for the installed graphic board, and to ensure all
gray levels are distinguishable, we recommend to adjust the brightness and
contrast levels for and only for analog inputs. Note that the calibration (in the
Look Up Table) is not changed by these adjustments (All the monitors are and
remain factory calibrated):
gray levels are distinguishable, we recommend to adjust the brightness and
contrast levels for and only for analog inputs. Note that the calibration (in the
Look Up Table) is not changed by these adjustments (All the monitors are and
remain factory calibrated):
Using a 100% black picture and an appropriate measurement device (a spot
meter recommended), decrease the brightness level using the OSD controls
until the measurement device displays a constant level (i.e. the measured value
no longer changes). Once this is achieved, increase the brightness level slightly
until the display is just above the absolute lowest black level (one step is
generally sufficient).
meter recommended), decrease the brightness level using the OSD controls
until the measurement device displays a constant level (i.e. the measured value
no longer changes). Once this is achieved, increase the brightness level slightly
until the display is just above the absolute lowest black level (one step is
generally sufficient).
Similarly, set the white level using a 100%-white test pattern and the
measurement device. Only the contrast level should be adjusted to ensure that
the black level remains unchanged.
measurement device. Only the contrast level should be adjusted to ensure that
the black level remains unchanged.
Control again the black value did not change. In case it did you need to
duplicate the two previous steps until it does not change anymore (cause:
pedestal).
duplicate the two previous steps until it does not change anymore (cause:
pedestal).
Increase the contrast level until the measurement device no longer detects an
increase in luminance. Once this is achieved, decrease the contrast level
increase in luminance. Once this is achieved, decrease the contrast level