ZX Pilot #06 01 апреля 1997

Железо

Computer literacy campaign - How to choose kachaestvenny and harmless to the health monitor.

        COMPUTER LIKBEZ


(C) PETER ORLOV


   Recently my friend bought a computer journalist, he worked 
for him for a few months and ran a clinic - started to take

eyes. Summed up the monitor: chasing a small difference in price
writing a person bought a unit, wherein all the "charms"
shoddy equipment of this kind. Flickering screen, glare,
static electricity, accumulating on the surface
kinescope, elevated levels of electromagnetic radiation ... As
to choose a good and harmless to the health unit?

   Anyone who is going to work on a computer at home, rather
everything stops at a cheaper 15-inch monitor. Itself
by itself, this has nothing says: important technical
characteristics.

   So, job number ONE: remember the words - "the frequency of 
personnel sweep. "Your monitor should work with at least 75Hz

(At a frequency below 70 Hz becomes noticeable screen flicker, 
and is a direct path to a headache). Most modern

vehicles meet these standards: Series monitors
"PanaSink" company "Panasonic", for example, maintain the 
frequency of frames up to 160 Hz.


   REFERENCE NUMBER TWO: remember cathode - ray tubes and
step between the points. Last words sound technical and 
confusing, but their meaning simple: the smaller the step 
points, the sharper the image. A tube is now used in three 
types: the most common tube with shadow mask, with a step of 
0.28 mm or less. Their main drawback - "drift" of the image 
that arises during the due to thermal strain. However, such 
powerful companies as "Philips", "Panasonic", "VyuSonik, found 
an outlet: the mask manufactured from special alloy - Invar. He 
no heat is not scary.


   On whether there is a monitor screen with a special coating
purchase, not only thinks a masochist or a complete simpleton.
Example - Coating type AGRAS "company" Panasonic ", which 
excludes occurrence of glare, reflection, and the accumulation 
of static electricity. Hawtrey Japanese inflicted on the inner 
side Screen layered metalized polymer that absorbs all

trash, which emits a monitor. Such coatings do the other
firm, but they reduce the brightness.

   And finally, the main Fenichka - the level of radiation. 
Here we helped the Swedes: their national council on 
measurement and testing developed a set of rules. If the 
monitor responds to them, he does not need a protective shield. 
But Western concern about the man on the spot not cost: of even 
more stringent standards, which monitor seen as an integral 
part of the entire computer. Among monitor vendors have already 
started a stir, especially because high demands on their 
quality and makes the program Environmental Protection Agency 
United States. Now, according to this agencies they meet only a 
few models of monitors companies Hitachi, Sony, VyuSonik "," 
PanaSink. 

   REFERENCE NUMBER THREE: The curves screens are only on the 
curves owners. All this trouble izdegayut differently. Weaker 
firms make monitors with pseudo tube, where the values ​​of the 
curvature very significant. Very nice tube "Trinitron" with

cylindrical screen, flat vertically.

   And finally, the last one. You do not go out on the seventh 
men in ragged pants? Meanwhile, health is not dangerous - unlike

nasty monitor. Take care about the convenience of adjustment of 
the angle slope, a successful on-screen menu, the algorithm 
settings ... Or advance podyschite yourself a good eye doctor.



       Candidate of Technical Sciences

     Piotr Orlov.