วันเสาร์ที่ 27 มีนาคม พ.ศ. 2553

Computer monitor


Comparison
[edit] CRT

Pros:

* High dynamic range (up to around 15,000:1 ,) excellent color, wide gamut and low black level.
* Can display natively in almost any resolution and refresh rate
* No input lag
* Sub-millisecond response times
* Near zero color, saturation, contrast or brightness distortion. Excellent viewing angle.

Cons:

* Large size and weight, especially for bigger screens (a 20" unit weighs about 50lbs or 22kg)
* High power consumption
* Geometric distortion caused by variable beam travel distances
* Older CRTs are prone to screen burn-in
* Produces noticeable flicker at low refresh rates

[edit] LCD

Pros:

* Very compact and light
* Low power consumption
* No geometric distortion
* Rugged
* Little or no flicker depending on backlight technology

Cons:

* Limited viewing angle, causing color, saturation, contrast and brightness to vary, even within the intended viewing angle, by variations in posture.
* Bleeding and uneven backlighting in some monitors, causing brightness distortion, especially toward the edges.
* Slow response times, which cause smearing and ghosting artifacts. Modern LCDs have response times of 8ms or less.
* Only one native resolution. Displaying other resolutions requires a video scaler, which degrades image quality at lower resolutions.
* Fixed bit depth, many cheaper LCDs are incapable of truecolor.
* Input lag
* Dead pixels are possible during manufacturing

[edit] Plasma
Main article: Plasma display

Pros:

* Compact and light.
* High contrast ratios (10,000:1 or greater,) excellent color, wide gamut and low black level.
* High speed response.
* Near zero color, saturation, contrast or brightness distortion. Excellent viewing angle.
* No geometric distortion.
* Highly scalable, with less weight gain per increase in size (from less than 30 inches wide to the world's largest at 150 inches).

Cons:

* Large pixel pitch, meaning either low resolution or a large screen.
* Noticeable flicker when viewed at close range
* High operating temperature and power consumption
* Only has one native resolution. Displaying other resolutions requires a video scaler, which degrades image quality at lower resolutions.
* Fixed bit depth
* Input lag
* Older PDPs are prone to burn-in
* Dead pixels are possible during manufacturing

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