In today's business environment, high quality monitors have gone
from being a luxury to a necessity. With employees and self-employed
professionals spending the majority of their days working with their
computer and monitor, it is more important than ever to purchase
a quality monitor that will provide crisp, bright images, while
reducing the strain on your eyes. This section will explain some
of the terms and technology you should know when purchasing a CRT
Hitachi Flat Panel Display Technology
Flat panel displays are revolutionizing the way people look at
their computers. Thin, light, space-saving, brighter, better for
virtually everyone agrees that these monitors
are the wave of the future. The sections below explain the Basics
of Flat Panel Technology, and its advantages and disadvantages
compared to traditional monitors, so you can make the buying decision
appropriate for your needs.
Screen Size: The screen size is measured
diagonally from corner to corner. Please note that the CRT size is
not the screen size. Most monitors will list "viewable image
size" which does not include the bezel and is the actual viewing
size for the monitor if it features edge-to-edge imaging.
How monitors work: The simple version
of this explanation is that inside the monitor casing there is a
Cathode Ray Tube (CRT). The CRT has an electron gun assembly that
fires electron beams that the mask shields and directs into specific
phosphors that glow and illuminate the image. Many Hitachi monitors
use a new PrecisionFocusTM technology that provides an
additional focus mechanism that ensures, crisper, brighter images
that are 10% sharper than the previous state of the art. In addition,
Hitachi uses Invar Shadow Mask technology that is composed of a
special heat resistant alloy which resists the warping that some
shadow mask monitors may experience.
The importance of resolution: Resolution
is the number of horizontal dots multiplied by the number of vertical
dots (pixels). Resolution (the density of the screen image) tells
the consumer how much information can be displayed on the screen.
Dot Pitch: Dot pitch is the diagonal
distance between two phosphors of the same color. The smaller the
dot pitch, the better the image - images will look crisper and edges
will appear smoother. Dot pitch is a KEY element to consider when
purchasing a monitor. Most Hitachi monitors have a .21mm horizontal
dot pitch and a vertical dot pitch ranging from .13mm - .16mm vertical
- one of the lowest dot pitches available to ensure, crisp details
- even at the edges.
Refresh Rates: Refresh rates
indicate the speed at which a screen is refreshed or re-drawn. The
higher the refresh rate, the less "flicker" a user will
encounter. Anything above 75 Hz for the monitors prime resolution
setting is considered VESA standard - a rating system that enables
a monitor vendor to use the "flicker-free" logo. The refresh
rates decline at higher resolutions because the number of pixels
the monitor must refresh increases, slowing down the refresh speed.
Consumers should check the refresh rate at various resolutions.
This is also a KEY factor in selecting a monitor because "flicker"
is one of the main causes of eyestrain. 85hz refresh rate is generally
recognized as flicker free. Since LCD monitors do not suffer from
flicker like CRT monitors, in most cases it is better to run a LCD
monitor at low refresh rates.
ErgoFlat vs. Flat, Square: Ergo
Flat is Hitachi's brand name for its flat-faced monitor and what
many call "Perfectly flat". Flat, Square is an industry
standard term used since 1997 indicating minimal curvature (but
still a curvature) of the monitor tube. Flat, Square is not flat-faced
like an ErgoFlat. There are benefits to both technologies at this
time. Flat-faced monitors from all manufactureers have some advantages
& drawbacks. On the plus side, they have much less glare than
the Flat, Square (FS) & images have a flater, more realistic
appearance. Some common problems with competitive flat-faced monitors
range from low brightness and poor performance at the edges and
corners to convergence and beam landing issues. Hitachi overcomes
these issues by using special glass with a 44% transmission rate(most
aperture grille models have 38 - 41% transmission rate) for improved
brightness and contrast. In addition, because of the Invar shadow
mask tube, our flat-face model does not require the multiple circuitry
controls used by aperture grille models to prevent heat warping,
as our new shadow mask has a 25G minimum strength rating. Still
many critics feel flat, square monitors may have an edge in sharpness
and geometry, as well as a price that is more accessible for most
consumers. Below is a picture of the side of both an Ergo Flat and
Flat, Square monitor so you can visually see the difference and
decide which meets your needs.