Comparison of display technology
From Wikipedia, the free encyclopedia
This is a comparison of various properties of different display technologies.
Contents |
[edit] General characteristics
| Shape of Screen |
diagonal screen size |
Typical Use | Usable in bright room | ||
|---|---|---|---|---|---|
|
|
|
||||
| Eidophor Front Projection | Flat |
by brightness) |
TV | No | |
| Shadow mask CRT | Spherical curve or flat |
|
|
Computer monitor, TV | Yes |
| Aperture grille CRT | Cylindrical curve or flat |
|
|
Computer monitor, TV | Yes |
| Direct view Charactron CRT | Spherical curve |
|
|
Computer monitor, Radar display |
No |
| CRT Self-contained Rear Projection | Flat lenticular |
|
|
TV | Yes |
| CRT Front Projection | Flat |
by brightness) |
TV or presentation | No | |
| PDP (Plasma Display Panel) | Flat |
|
|
TV | Yes |
| Direct View LCD | Flat |
|
|
Computer monitor, TV | Yes |
| LCD Self-contained Rear Projection | Flat lenticular |
|
|
TV | Yes |
| LCD Front Projection | Flat |
by brightness) |
TV or presentation | No | |
| DLP Self-contained Rear Projection | Flat lenticular |
|
|
TV | Yes |
| DLP Front Projection | Flat |
by brightness) |
TV or presentation | Yes | |
| LCoS Self-contained Rear Projection | Flat |
|
|
TV | Yes |
| LCoS Front Projection | Flat |
by brightness) |
TV or presentation | No | |
| SED | Flat |
|
|
Computer monitor, TV | Yes |
| FED | Flat |
|
|
Computer monitor, TV | Yes |
| OLED | Flat |
|
|
Computer monitor, TV | Yes |
| IMOD | Flat |
|
|
Mobile phone[11] | Yes |
| Virtual retinal display | Any shape |
|
Experimental, possibly virtual reality | Depends on system | |
[edit] Temporal characteristics
Different display technologies have vastly different temporal characteristics, leading to claimed perceptual differences for motion, flicker etc.
The figure shows a sketch of how different technologies present a single white/gray 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.
DLPs use a kind of "chromatic multiplex" 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.
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".
Plasma displays modulate the "on" time of each sub-pixel, similar to DLP.
Movie theaters use a mechanical shutter to "flash" the same frame 2 or 3 times to avoid flickering.
[edit] See Also
Large-Screen Television Technology
[edit] References
- ^ Shadow mask CRT
- ^ Aperture grille CRT
- ^ Self-contained Rear Projection CRT
- ^ Plasma Display Panel
- ^ Direct View LCD
- ^ LCD Rear Projection
- ^ DLP
- ^ LCoS
- ^ SED
- ^ OLED
- ^ IMOD
