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Transcript of CGIntroAndHardware_0d
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August 1, 2012
Organic LED Arrays
Organic Light-EmittingDiode (OLED) Arrays
The display of the future?
OLED are:
Transparent Flexible
Light-emitting, and quite
bright (daylight visible)
Large viewing angle
Fast (< 1 microsecond
off-on-off) Can be made large or
small
Available for cell phones
and car stereos
Hardware IV Computer Graphics
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(Display Technologies and Devices)
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FED:
Field Emissive Displays were once heir to CRT throne
Super-small emitters of electrons attracted to frontglass
Super-fine pixel pitch (comparable to OLEDs) High brightness,
wide viewing angles,
saturated color
August 1, 2012
FEDs use an array of carbon nanotubes for emission of electrons
Hardware IV Computer Graphics
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SED uses an emitter array based on palladium oxide
SED(Surface-conduction Electron-emitter Display)
Hardware IV Computer Graphics
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iMod:
Interferometric Modulator uses natural
reflective principles (interferometer)
Two-position pixel reflects or absorbs light
RGB stripes are used for color imaging
Initial target is handheld electronics, near-
to-eye
Marketed in May 2008 for mobile displays
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Hardware IV Computer Graphics
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Portable, flexible, reusable, light-weight, non-backlit
Slow for animations
Wider viewing angle
Used in e-books
Video
August 1, 2012
Electronic Paper
Hardware IV Computer Graphics
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http://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/flicflex%20concept.WMVhttp://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/flicflex%20concept.WMV -
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Surface looks like surface of a table
No mouse or keyboard, just fingers moving andtouching on the surface
Surface recognizes camera, mobile, etc.
File transfer from one device to another with just theflick of a finger
Touch animations and multimedia handling
Video
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Microsoft Surface Technology
Hardware IV Computer Graphics
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http://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/MSSurface.mp4http://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/MSSurface.mp4 -
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No mouse or keyboard, just fingers moving on thesurface or accepting a particular sign language or
sound Made using different technologies
Used in conferences, stadia and halls
Animations and multimedia handling
Video
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Wall Display
Hardware IV Computer Graphics
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http://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/Hybrid%20vision-%20and%20sound-based%20interaction%20on%20display%20walls.WMVhttp://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/Hybrid%20vision-%20and%20sound-based%20interaction%20on%20display%20walls.WMV -
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Hardware IV Computer Graphics
3D Dislplays With Glasses
Our two eyes see two different images and this produces the3D perception of depth. Two images are produced in thedisplay and we have to wear glasses to see 3D image gettingdifferent images for two eyes.
Active-shutter glasses are actually small LCD screens thatalternately dim the left and right "lenses" in succession. Theyrely on an infrared signal emitter in the TV that tells eachpair of glasses when they should dim each lens, so each eyecan see the image intended for it. Since active-shutter
glasses are fairly complicated electronics, they're pricey: Atypical pair usually runs about $150. They depend on
batteries to keep running Continued ..9
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Hardware IV Computer Graphics
. 3D Dislplays With Glasses
Passive 3D glasses, on the other hand, are sort oflike a pair of specially designed polarized sunglasses.Polarized 3D glasses block different kinds of light fromeach eye, creating the illusion of depth. That means
you don't need any kind of expensive, delicateelectronics in the glasses themselves, nor do you needa proprietary infrared emitter to sync with the glasses--but since each lens is blocking out light, you're
technically not getting a full 1080p image for each eye,though your brain should be perceiving a 1080p imagewhen it puts the two together.
Video
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http://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/3D%20Images--Without%20Glasses!%20_%20PCWorld.flvhttp://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/3D%20Images--Without%20Glasses!%20_%20PCWorld.flv -
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Hardware IV Computer Graphics
3D Dislplays Without Glasses(Autosetreoscopic)
Among various display technologies , autostereoscopic displays suchas volumetric, lenticular, parallax barrier, integral photography,and hologram displays, present a 3D image to a viewer withoutwearing glasses or other aids. Autostereoscopic systems display manydifferent view images in time or spatially. Among them, lenticulardisplay is easily manufacturable, provides high brightness, andgenerates multiple views.In the lenticular display, the LCD pixel array is located at the focalplane of a lenticular sheet. Lenticules are tiny lenses on the baseside of a special film. Lenticules refract the lights from LCD pixelarray, and make different images observed depending on the viewers
eye position. Since the images viewed from left and right eyes aredifferent, we may generate stereoscopic information or 3D imagedisplay. It interlaces two images. it depends upon the audience being
in a sweet spot to get the 3-D effect. Continued ..
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Hardware IV Computer Graphics
.. 3D Dislplays Without Glasses
Video
Aparallax barrier is a device placed in front of an imagesource, such as a liquid crystal display, to allow it to showa stereoscopic image or multiscopic image without the needfor the viewer to wear 3D glasses. Placed in front of thenormal LCD, it consists of a layer of material with a series of
precision slits, allowing each eye to see a different setof pixels, so creating a sense of depth through parallax.A disadvantage of the technology is that the viewer mustbe positioned in a well-defined spot to experience the 3D
effect. Another disadvantage is that the effective horizontalpixel count viewable for each eye is reduced by one half.
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Made using laser technology
3-D display and 3-D Screens
Contains a lot of information
Useful for archiving 3-D objects, advertisements,exhibition of expensive objects
Holographic interactive Computer Screens
3DAvailable in cell phones in a few years time
Video I
Video II
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Holographic Displays
Hardware IV Computer Graphics
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http://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/HolographicDisplay.FLVhttp://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/Hologram.flvhttp://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/Hologram.flvhttp://localhost/var/www/apps/conversion/releases/20121120192253/tmp/scratch_4/HolographicDisplay.FLV -
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Raster GraphicsMonitors
How to generate aline using rasters
A line isrepresented by
assigning somepixels a value of 1The entire line isspecified by thepixel values
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Raster and Vector Display
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Vector GraphicsPlotters
How to generate
an image usingvectors
A line is represented
by endpoints (50,50)
to (120,150)
The points along theline are computed
using a line equation
y = mx + b
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Bitmap Images vs Vector Images
Enlarging a bitmap image
simply enlarges the
individual dots of color.
The result is bigger,
chunkier dots, with no
additional detail.
When a vector image is
enlarged, it is re-drawn at a
higher resolution,
displaying as much detailas possible from the
original image.
Hardware IV Computer Graphics
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