Multiscan CPD-G500 21" Monitor - Page 3
In addition, there is the GeoLock Plus™ circuitry which
automatically senses and compensates for image or colour
distortion caused by electromagnetic fields, a common problem
at the corners of large screen displays.
monitor also employs Beam Landing Correction™ technology that allows
the user to adjust the exact placement of all three electron
beams (red, green and blue) for enhanced colour purity and
uniformity across the entire screen.
The display also offers users
a unique feature called the DisplayMouse™ control. This
soft-touch front panel control allows for fast and easy
on-screen navigation, quick image set-up, image customization
and display manipulation.
The new DisplayMouse
How a Cathode Ray
Tube (CRT) monitor works is determined by the electron beams
generated at the very back of the cathode. We have three
beams (Red, Blue and Green) generated by the electron gun.
The beams are then focused through a series of lenses and
control grids. The electron beams trace the phosphor layer
painted on the inside of the CRT and change their shapes
at the corner and edges. This elliptical shape doesn't "fit"
properly into the confines of the aperture grill pitch and
hence some of the beams' energy is wasted. This loosely
translates into why the display from your conventional monitors
usually appear 'sucky' at the corners.
conventional electron gun
Bottom: Sony's electron gun with Elliptical
How the Sony's Elliptical
Correction System™ works is that the system actually improves
focus by refining the dimensions of the electron beam spot
using grids. What you get is a more consistent display,
especially at the corners of the display.
Correction System. Corners are elongated.
With Elliptical Correction
System. Grid size is consistent.
Correction System™ incorporates an additional astigmatic
lens which helps to compensate for beam spread. As a result,
the horizontal vs vertical measurements result in a 35%
improvement, giving you a more uniform and consistent image!
What's this Active Signal Correction?
The Active Signal
Correction™ (or ASC for short) allows the monitor to automatically
resize and center the video image based on timing signals.
Don't you just hate it when you change resolution, the video
image shifts away from the center and you have to manually
centre it again?
The Sony's Active
Signal Correction™ solves this by recognizing the various
signal attributes such as signal back porch, raster, as
well as the entire video signal. By considering all the
video parameters, the image can be more accurately sized.
With Active Signal
Those Gray Lines Running Across The Monitor?
users should be aware about the two gray lines which run
horizontally across the monitor. What the heck are those?
Well, these two gray lines are actually caused by the shadow
of the damper wire used to stabilize the aperture grill.
According to the monitor technical specifications, there
are currently two display technologies used to isolate pixels.
Together with one of these technologies, pixels form the
image to be displayed on the monitor.
mask technology relies on an opaque sheet with small
pinholes to separate pixels both horizontally and vertically.
Aperture grille technology employs a series of
thin, closely-spaced vertical wires to isolate pixels
horizontally. The pixels are separated vertically by the
nature of the scan lines used to compose the image.
There are three
advantages of the aperture grille method. First, this method
allows more electrons to go through, resulting in a brighter
image with better contrast. The second advantage is that
the monitor's vertical resolution is not dependent upon
the vertical spacing of pinholes. A third advantage of an
aperture grille is that it is much less susceptible as compared
to a shadow mask by warping caused by heat.
To keep the
vertical wires in an aperture grille properly aligned within
the picture tube, one or two horizontal damper wires are
required. A 14-inch or smaller Sony computer monitor employs
one such wire. It is located about a third of the way from
the bottom of the screen. Sony computer monitors larger
than 14 inches use two horizontal damper wires. These wires
are each located roughly a third of the way from the top
and bottom of the screen. Each wire casts a faint light
gray shadow which appears as a horizontal line on the image.
This shadow is not normally visible, but it may become apparent
on displays with lightly-coloured backgrounds.