Comparison of display technology
This is a comparison of various properties of different display technologies.
|Display technology||Screen shape||Largest known diagonal||Typical use||Usable in bright room|
|Eidophor front projection||Flat||(limited only by brightness)||TV||No|
|Shadow mask CRT||Spherical curve or Flat||42||107||Computer monitor, TV||Yes|
|Aperture grille CRT||Cylindrical curve or Flat||42||107||Computer monitor, TV||Yes|
|Monochrome CRT||Spherical curve or Flat||30||76||Computer monitor, TV,
Radar display, Oscilloscope
|Direct view Charactron CRT||Spherical curve||24||61||Computer monitor,
|CRT self-contained rear-projection||Flat lenticular||80||203||TV||Yes|
|CRT front projection||Flat||(limited only by brightness)||TV or presentation||No|
|Plasma display panel (PDP)||Flat||152||386||TV||Partial|
|Direct view LCD||Flat||110||274||Computer monitor, TV||Yes|
|LCD self-contained rear-projection||Flat lenticular||70||178||TV||Yes|
|LCD front-projection||Flat||(limited only by brightness)||TV or presentation||Yes|
|DLP self-contained rear-projection||Flat lenticular||120||305||TV||Yes|
|DLP front-projection||Flat||(limited only by brightness)||TV or presentation||Yes|
|LCoS self-contained rear-projection||Flat||110||279||TV||Yes|
|LCoS front-projection||Flat||(limited only by brightness)||TV or presentation||Yes|
|Laser self-contained rear projection||Flat lenticular||75||191||TV||Yes|
|SED||Flat||55||140||Computer monitor, TV||Yes|
|FED||Flat||?||?||Computer monitor, TV||Yes|
|EPD (e-paper)||Flat (flexible)||?||?||Electronic paper||Yes|
|OLED||Curved or Flat (flexible)||77||195.58||Computer monitor, TV, Mobile phone||Yes|
|Laser Phosphor Display (LPD)||Flat / Box||?||?||Projection||Yes|
|Virtual retinal display||Any shape||N/A||N/A||Experimental, possibly
Different display technologies have vastly different temporal characteristics, leading to perceptual differences for motion, flicker, etc.
The figure shows a sketch of how different technologies present a single white/grey frame. Time and intensity is not to scale. Notice that some have a fixed intensity, while the illuminated period is variable. This is a kind of pulse-width modulation. Others can vary the actual intensity in response to the input signal.
- Single-chip DLPs use a kind of "chromatic multiplexing" in which each color is presented serially. The intensity is varied by modulating the "on" time of each pixel within the time-span of one color. Multi-chip DLPs are not represented in this sketch, but would have a curve identical to the plasma display.
- LCDs have a constant (backlit) image, where the intensity is varied by blocking the light shining through the panel.
- CRTs use an electron beam, scanning the display, flashing a lit image. If interlacing is used, a single full-resolution image results in two "flashes". The physical properties of the phosphor are responsible for the rise and decay curves.
- Plasma displays modulate the "on" time of each sub-pixel, similar to DLP.
- Movie theaters use a mechanical shutter to illuminate the same frame 2 or 3 times, increasing the flicker frequency to make it less perceptible to the human eye.
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