Wiempy wrote:
> Mas Bass, di kantor saya ada monitor Philips Brilliance type
> 107P5 gak ada dua garis tipis seperti itu. Kebetulan saya
> sempat pake monitor tsb selama 6 bulan dan tahu persis,
> lalu saya ganti monitor dari CRT ke LCD.
>
> Anda bisa menjelaskan kenapa bisa seperti itu ?
> Sory saya gak ngerti klo masalah kaya begitu, baru mudeng
> sekarang ini.
>
> Salam,
> Wiempy
>
>
Kemungkinan monitor philips Anda baru, atau sudah ganti oemnya. Sony
juga sudah tidak memproduksi crt lagi, jadi kemungkinan tidak ada lagi
monitor trinitron lagi. Di Kantor saya kebetulan juga baru beli
viewsonic pro p76f+B, walupun spek tinggi, juga sudah tidak ada 2 garis
tipis lagi.
Yg ini mungkin tidak terlalu panjang dan mudah dipahami, banyak lagi
kalo mau googling.
12 Why does my monitor have 1/2/3 faint horizontal lines on it?
Your monitor likely uses a Sony Trinitron picture tube. Trinitron 1
tubes can be recognized because they are curved only in the horizontal
plane, but are flat vertically. Typically, the number of lines seen
depends on the monitor size:
< 17" 1 line
17-21" 2 lines
> 21" 3 lines
Because of the technical nature of how CRT's work, few people understand
the details of how they operate. As such, many laymen have viewed Sony's
Trinitron design as being a proprietary black box because they don't
understand Sony's technical documents. A fairly well accepted
description of the way these tubes work follows.
For a description of how a standard shadow mask CRT works, see "What is
a shadow mask?".
Sony's Trinitron design uses a variation of the shadow mask called the
aperture grill (or guard grill). Rows of very fine metal strips run
vertically down the screen, separating columns of coloured phosphor
which are arranged in alternating stripes of red, green and blue. This
configuration allows the phosphor strips to be placed closer together
than conventional dot triads, and the fine vertical wires block less of
the electron beam than traditional shadow masks, resulting in a brighter
image, and less thermal buildup and distortion. Coupled with changes in
the way that the electron guns are arranged, this design results in a
crisp, bright image. However, the vertical strips are so fine that they
can be set into motion when contacted by the electron beam (thermal
changes) . This would result in a shimmer on the screen which would be
quite distracting. To remedy this, Sony puts horizontal stabilizing
wires across the vertical ones. This reduces shimmer, but results in one
or more fine horizontal lines being visible on the monitor. As mentioned
above, the number of lines increases with monitor size. Usually, these
lines are only visible to a discerning viewer when looking at a bright,
solid background. If you're an experimentalist, try gently smacking the
side of a Trinitron monitor, and look to see the wires shimmer.
Basically, the horizontal lines are a minor trade-off when compared to
the superior brightness and vertical flatness of the Trinitron screen.
What follows is a statement from Sony about their aperture grille design:
Since its introduction in 1968, Sony has produced more than 70 million
CRT's. Award-winning Trinitron CRT's are used in a multitude of
applications, including high resolution displays for the computer
industry. Today, Trinitron CRT's are used by Sony and other leading
manufacturers to meet the ever increasing demands and expectations of
computer users throughout the world.
One of the unique features of the Trinitron CRT is what is called the
Aperture Grille. An Aperture Grille consists of a series of long
vertical slits fastened with strong vertical tension to a steel
supporting frame. Electron beams pass through the Aperture Grill to
illuminate phosphor on the faceplate. The vertical tension of the
Aperture Grille absorbs any thermal expansion, thus eliminating the
problem of doming or color spill and resulting in a superior picture
quality.
Since the CRT requires a vacuum to function, a damper wire which is
approximately 15 microns in diameter is strategically placed on the
Aperture Grille to reduce susceptibility to resonance. The "line" that
some customers see on the screen is not a fault but the damper wire
which has always been an integral part of our Trinitron technology.
We hope that our customers will continue to consider the overall
attributes and excellence of the Trinitron system when evaluating our
products.
http://stason.org/TULARC/pc/video-faq/12-Why-does-my-monitor-have-1-2-3-faint-horizontal-lines-on-it.html
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