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technical qualitiesof flat screen tv 20"

By VideoMethods ·
I NEED TYPICAL TECHNICAL SPECS FOR THE DISPLAY OF CONVENTIONAL TV SCREENS 20"(NOT FLAT SCREEN).

EX: PIXEL RATIO= X ,

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by TheChas In reply to technical qualitiesof fla ...

In the US, "standard" conventional TV resolution is measured in lines, not pixels.

Per the NTSC specification:

"The NTSC standard has a fixed vertical resolution of 525 horizontal lines stacked on top of each other, with varying amounts of "lines" making up the horizontal resolution, depending on the electronics and formats involved. There are 59.94 fields displayed per second. A field is a set of even lines, or odd lines. The odd and even fields are displayed sequentially, thus interlacing the full frame. One full frame, therefore, is made of two interlaced fields, and is displayed about every 1/30 of a second."

As you increase screen size, the width of each line gets wider.
A larger TV screen does not necessarily have any better resolution than a small screen.

For "standard" TV, the ratio is around 4:5 for height versus width.

A conventional TV screen is a pure analog device. The working resolution depends on how the CRT is manufactured, and how well the electronics function.

Functionally however, most color CRT's do have a dot pattern that makes up the image. The size of the image dot will vary from manufacture to manufacture. There are several different pattern styles in use.

In Europe, the PAL system works a bit differently, but is still a pure analog system.

HD-TV which is coming to all of the US soon is a digital system and has a pixel type resolution.

Chas

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