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FAQ's (Frequently Asked Questions)
I have just noticed a thin gray line on the image displayed by my Sony computer monitor. It is about one-third of the way from the bottom of the screen. Is this normal?
This is normal. What you are seeing is the shadow cast by the horizontal damper wire used to stabilize the aperture grille featured on all Sony Trinitron picture tubes.
Currently, there are two display technologies designed to isolate individual picture elements (pixels). Together, these pixels form the image displayed on a computer's monitor. Shadow 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 two main advantages of the aperture grille method. The most visible is that this method allows more electrons through, resulting in a brighter image with better contrast. The second advantage is that the monitor's vertical resolution is not dependent upon, nor affected by, the vertical spacing of pinholes. A third advantage of an aperture grille is that it is much less susceptible than a shadow mask to 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 one-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 located roughly one-third of the way from the top and bottom of the screen. Each wire casts a faint shadow that is visible as a light gray, horizontal line on the image. This shadow is normally not visible, but may become apparent when displaying a lightly-colored background.
What is Multiscan Technology?
Multiscan Technology enables a monitor to self-adjust to video signal from a variety of graphics boards. This makes it possible to switch betwen graphic modes without user involvement.
What is difference between Trinitron technology and Shadow Mask technology?
The Trinitron technology uses an aperture grille. This grille, designed with long, unbroken slits, allows more light and color to reach the screen, resulting in purer and more colorful images. The Shadow Mask uses a mesh-like, darker screen that creates a color shift (doming) distortion and prevents color purity.
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