Comparison CRT, LCD, Plasma

Comparison CRT, LCD, Plasma

This is a page that lists advantages and disadvantages with CRT, LCD, Plasma and OLED.

Contents

Comparison

CRT

Pros:

  • High dynamic range (up to around 15,000:1),[1] excellent color, wide gamut and low black level. The color range of CRTs is unmatched by any display type except OLED.
  • No native resolution; the only display technology capable of true multisyncing (displaying many different resolutions and refresh rates without the need for scaling)
  • No input lag
  • No ghosting and smearing artifacts during fast motion due to sub-millisecond response time, and impulse-based operation
  • Near zero color, saturation, contrast or brightness distortion.
  • Allows the use of light guns/pens
  • Excellent viewing angle

Cons:

  • Large size and weight, especially for bigger screens (a 20-inch (51 cm) unit weighs about 50 lb (23 kg))
  • Relatively high power consumption at high brightness and contrast levels and fast scan rates
  • Generates a considerable amount of heat when running
  • Geometric distortion caused by variable beam travel distances
  • Can suffer screen burn-in
  • Produces noticeable flicker at low refresh rates.
  • Apart from televisions, CRT monitors are normally only produced in 4:3 aspect ratio (though some widescreen CRT monitors, notably Sony's GDM-FW900, do exist)
  • Hazardous to repair/service
  • Color displays cannot be made in sizes smaller than 7 inches. Maximum size for direct-view displays is limited to about 40 inches due to practical and manufacturing restrictions (a CRT display of this size can weigh about 300 pounds).

LCD

Pros:

  • Very compact and light
  • Low power consumption, generally speaking. On average, 50-70% less energy is consumed than CRT monitors. [2]
  • No geometric distortion
  • Little or no flicker depending on backlight technology
  • Not affected by screen burn-in (though an analogous but less severe phenomenon known as image persistence is possible)
  • Can be made in almost any size or shape
  • No theoretical resolution limit

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
  • Smearing and ghosting artifacts during fast motion caused by slow response times (2-8 ms) and sample-and-hold operation
  • Only one native resolution. Displaying other resolutions either requires a video scaler, lowering perceptual quality, or display at 1:1 pixel mapping, in which images will be physically too large or won't fill the whole screen.
  • Fixed bit depth. 8-bit S-IPS panels can display 16 million colors and have significantly better black level, but are expensive and have slower response time.
  • Input lag
  • Dead pixels may occur either during manufacturing or through use.
  • In a constant-on situation, thermalization may occur, which is when only part of the screen has overheated and therefore looks discolored compared to the rest of the screen.
  • Unacceptably slow response in low temperatures.
  • Not all LCD displays are designed to allow easy replacement of the backlight
  • Cannot be used with light guns/pens

Plasma

Pros:

  • High contrast ratios (1,000,000:1 static or greater,) excellent color, and low black level
  • Virtually no response time
  • Near zero color, saturation, contrast or brightness distortion. Excellent viewing angle.
  • No geometric distortion
  • Softer and less blocky-looking picture than LCDs
  • Highly scalable, with less weight gain per increase in size (from less than 30 in (76 cm) wide to the world's largest at 150 in (3.8 m)).

Cons:

  • Large pixel pitch, meaning either low resolution or a large screen. As such, color plasma displays are only produced in sizes over 32 inches (81 cm).
  • Image flicker due to being phosphor-based
  • Glass screen can induce glare and reflections
  • High operating temperature and power consumption. LCD and LED-based displays consume less power. [3]
  • Relatively heavy weight
  • Only has one native resolution. Displaying other resolutions requires a video scaler, which degrades image quality at lower resolutions.
  • Fixed bit depth. Plasma cells can only be on or off, resulting in a more limited color range than LCDs or CRTs.
  • Can suffer image burn-in. This was a severe problem on early plasma displays, but newer models have incorporated methods to reduce the chance of accidental burn-in.
  • Relatively fragile; should only be transported, stored, and operated upright, as the glass screen can shatter under the display's own weight if not supported properly
  • Cannot be used with light guns/pens
  • Dead pixels are possible during manufacturing

OLED

Pros:

  • Excellent viewing angle
  • Very light weight
  • Excellent black level
  • No ghosting and smearing artifacts during fast motion due to sub-millisecond response time
  • Wide gamut and vivid colors because of no backlit

Cons:

  • Can suffer screen burn-in
  • Difficult and expensive to manufacture at the present time
  • Organic materials used (as of 2011) are susceptible to decay over time, rendering the display unusable after some time

External links

References

  1. ^ Display "Technology Shoot-Out: Comparing CRT, LCD, Plasma and DLP Displays", Dr. Raymond M. Soneira, DisplayMate Technologies website
  2. ^ "CRT vs LCD monitor", EU Energy Star, EU Energy Star's Website
  3. ^ "LCD vs Plasma TVs". Which?. http://www.which.co.uk/technology/tv-and-dvd/guides/lcd-vs-plasma-tvs/lcd-tv/. Retrieved 26 October 2011. 

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