Display System

Display Systems

Anamorphic use an aspect ratio of 1.33:1 when shot with 35mm film or other visual recording media. It also has a 2.35:1 aspect ratio when projected.

Widescreen use 4:3 (1.33:1) as the original screen ratio for broadcasts (television). An for widescreen computers the aspect ratio is 16:9

4:3 Standard screen  have the ability to display wide-screen content. home theater with big flat television panel image by Pavel Losevsky from Fotolia.com

Although these sets are not optimized for such material, many have special modes designed to maximize the potential of 16:9 wide-screen formats

The difference between PAL standard and NTSC

PAL standard is used in Afghanistan, Angola, Gambia, Zambia, United Kingdom and Spain

PAL has a resolution with 576 lines and uses a refresh rate of 50 interlaced fields per second

NTSC standard is used in countries like Burma, South Korea, Taiwan, Japan, Philippines it is also used in North America and most of South America.

North America, most of South America

NTSC has a resolution of 480 lines. Uses a refresh rate of 60 interlaced fields per second.

Comparing CRT with LCD display screens

The screen size on a 17- inch CRT monitor is around 16.1 inches or a bit more of the actual viewing area and in LCD you get a full 17  viewable area, or very close to a 17.

Dot Pitch

On either type of display screen a smaller dot pitch is better. Dot pitch is the spaces between the pixels that make up most people today tend to look at a 17-inch CRT or bigger monitor.

Resolution on a CRT is flexible and a newer model will provide you with viewing resolutions of up to 1600 by 1200 and higher.  On an LCD the resolution is fixed within each monitor.  The Resolution on an LCD can be changed

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The difference between square pixels and non- square pixels

If the application is use for Alignment; Measurement; Analyze; the object, it is better to use Square Pixels because the image size (Height & Width) which you capture is same as the actual object size. If you use non-Square Pixels CCD camera, the Width of the image will be wider than the actual object size.

 

 

 

 

 

 

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