DLP Projector Flickers
 |
No items matching your keywords were found.
Halo 3 Title theme played on Theremin - Unforgotten aka Never Forget
Comparison of display technology
General characteristics
Comparison of various properties of different display technologies
Display technology
Screen shape
Largest known diagonal
Typical use
Usable in
bright room
(in)
(cm)
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
40
102
Computer monitor, TV
Yes
Monochrome CRT
Spherical curve or Flat
30
76
Computer monitor, TV,
Radar display, Oscilloscope
Yes
Direct view Charactron CRT
Spherical curve
24
61
Computer monitor,
Radar display
No
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
Yes
Direct view LCD
Flat
108
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
65
165
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
Flat
40
102
Computer monitor, TV, Mobile phone
Yes
QDLED
N.A.
N.A.
N.A.
N.A.
Yes
IMOD
Flat
1.2
3
Mobile phone
Yes
Virtual retinal display
Any shape
N.A.
Experimental, possibly
virtual reality
Depends
on system
Display technology
Screen shape
Largest known diagonal
Typical use
Usable in
bright room
(in)
(cm)
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/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.
See also
Computer monitor
Large-screen television technology
References
^ Shadow mask CRT
^ Aperture grille CRT
^ Monochrome CRT
^ Self-contained Rear Projection CRT
^ World's largest 152-Inch Full HD 3D Plasma Display
^ Direct View LCD
^ LCD Rear Projection
^ DLP
^ LCoS
^
^ SED
^ OLED
^ Quantum Dots QDTV Displays from Nanoco Technologies
^ Quantum Dot LEDs
^ LED's Outpower QDLED's
^ Ocean NanoTech research in QDLEDs
^ Mirasol
^ IMOD
v d e
Display technology
Video
Current generation
Electroluminescent display (ELD) Vacuum fluorescent display (VFD) Light emitting diode (LED) display Cathode ray tube (CRT) Liquid crystal display (LCD) (TFT LED backlight) Plasma display panel (PDP) 3LCD Digital Light Processing (DLP) Liquid crystal on silicon (LCOS)
Next generation
Organic light-emitting diode (OLED) (roll-up display Active-matrix Phosphorous) Surface-conduction electron-emitter display (SED) Field emission display (FED) Laser TV Ferro Liquid display (FLD) Interferometric modulator display (IMOD) Thick-film dielectric electroluminescent (TDEL) Nanocrystal display Quantum dot display (QDLED) Time-multiplexed optical shutter (TMOS) Telescopic pixel display (TPD) Liquid crystal lasers (LCL) Laser Phosphor Display (LPD)
Non-video
Electromechanical (Flip-dot Split-flap Vane) Electronic paper Rollable Eggcrate Nixie tube
3D display
Stereoscopic Autostereoscopic Computer generated holography Volumetric Laser beam
Static media
Hologram Movie projector Neon sign Rollsign Slide projector Transparency
Related articles
Display examples Free-space display Large-screen television technology Optimum HDTV viewing distance High dynamic range imaging (HDRI)
Comparison of display technology
Categories: Display technology | Technological comparison
About the Author
I am a professional editor from
Chinese Manufacturers
, and my work is to promote a free online trade platform.
http://www.chinaqualitycrafts.com/ contain a great deal of information about
baby hairbrush
,
boar bristle hair brushes
welcome to visit!
DLP Projector Color Issue?
DLP Projector color wheel malfunction?
I have an Optoma 739/745 with about 1400 hours on the first lamp. After about 1hour of operation the image gets color banding (gradients look bad) then the color begins to flicker and the image turns green. Blues look red, etc ...
What is the issue and how can I fix it?
A quick test to verify color wheel problems is to LOOK at the built-in menues on the projector....if they are off color then it MIGHT be a color wheel problem OR it could be a problem related to the interface cable (aka LVDS cable) or the final video processor IC.....
A good way to verify it is OUTSIDE the projector is to KNOW what type of cable is delivering the Video to your projector....
Component cables do have a tendency to "slowly disconnect" over time causing intermittant color changes....so definitely check and RESEAT those connections on both ends....
And if the color shifts, you can disconnect the Red and Blue connectors and see if the problem exists ONLY with the GREEN connector connected....
The Green connector by itself produces a Black and White picture which you can use to verify if the BANDING is actually caused by your SOURCE and not the PROJECTOR....
In my job, we always "Divide and Conquer" the problem first....using the Menu to see if it's in the projector and the Green-Only connection to see it it's outside the projection unit.....
Or we might try another source on the same cable, like another DVD player......that would isolate it to the cable or the projector if it's also a bad signal.
