Transcript digital light processing (dlp) rovolution in vision

DIGITAL LIGHT
PROCESSING
(DLP)
REVOLUTION IN VISION
PRESENTED BY:Visionodisha Group
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INTRODUCTION.
DIGITAL MICROMIRROR DEVICE (DMD).
ORIGIN OF DLP.
WORKING OF DLP.
DLP FEATURES.
ONE OR THREE CHIP PROJECTOR.
ADVANTAGES OF DLP.
DISAVANTAGES OF DLP.
APPLICATION OF DLP.
FUTURE OF DLP.
CONCLUSION.
INTRODUCTION:• Up until recently, big screen projection
sets are come in two types:- CRT based
projector and the other is LCD based
projector.
CATHODE RAY TUBE:• Cathode Ray Tube is basically a “hot-cathode
device”. Cathode Ray Tube (CRT) is known to
be a beam of electron emitted from a heated
cathode inside a vacuum tube and accelerated
by a potential difference between the cathode
and anode.
• An image is produced by modulating the
intensity of the electron beam received by the
video signal.
Cathode ray tube:• CRT is still finding a useful device in
computer gaming due to the high refresh
factor and higher resolution per initial cost.
• The flicker in the monitor or screen causes
headaches. Due to high voltage
recruitment it consumes more power and
difficult to maintain.
LIQUID CRYSTAL DISPLAY:• A Liquid Crystal Display (LCD) is a thin, flat
display device made up of many no of colour or
monochrome pixels arrayed in front of a light
source or reflector. It uses very small amount of
electric power then other system ,so can be
used in any powered electronics devices.
Liquid crystal display:• Drawbacks of LCD:1) Low contrast ratio.
2) Longer responses time then plasma
and CRT.
3) In capable of viewing very low
resolution images.
• Applications:Television screen, LCD projector, monitors
PLASMA TECHNOLOGY:• Plasma technology is different from all other
technology, here in each pixels a source is of light
is produced.
• The main attraction of plasma screen is the fact
they are flat enough to be wall mounted, thus
eliminating the need for that box or separate
projector.
Plasma technology:• Advantages of Plasma:1) Flat enough to be well mounted and
eliminating box or separate projector.
2) It provides a viewing image which
can view from any angle with in 160
degree.
3) No magnetic disturbances.
4) Multimedia flexibility.
• Disadvantages:More expansive then CRT & LCD.
DIGITAL MICROMIRROR
DEVICE(DMD)
• A Digital Micromirror Device (DMD) is
simply a semiconductor switch.
• A DMD chip has on its surface several
thousand of microscopic mirrors arranged
in a rectangular array which correspond to
the pixels in the image to be displayed.
• The mirror is made up of aluminum and
around 16 micrometer across.
Digital Micromirror Device:• Each one is mounted on a yoke which in
turn is connected to two support posts by
compliant torsion hinges. The hinges can’t
be damaged by normal shock or vibration,
since it is absorbed by DMD super
structure.
• The advantages of this are more accurate
timing and more filmic moving image.
Digital Micromirror Device:• The advantages of this are more accurate
timing and more filmic moving image.
• Applications:Television and HDTVs
Holographic versatile discs.
Head mounted displays.
ORIGIN OF DLP:• First DMD (Digital Micromirror Device) was
invented by Larry Hornbeck in 1987.
• In year 1994 Texas Instruments
demonstrated the DLP (Digital Light
Processing) projector.
DIGITAL LIGHT
PROCESSING(DLP)
• Digital light processing (DLP) is a
technology used in projector as well as in
video projectors.
• It was invented in Texas instruments in
1987 by Dr. Larry Hornbeck, which creates
the final link to display digital visual
information.
WORKING OF DLP:• DMD (Digital Micromirror Device) is the
cornerstone of DLP (digital light
processing) as CPU is the heart of
computers.
• It includes:-1. A light system
2. A color filter system
3. A cooling system.
4. A projection optics.
Working of DLP:• Depending upon the application a DLP will
accept either digital or analog signal.
When it receives an analog signal it
converts the analog signal into digital form
in DLP’s front end processor.
Working of DLP:• The signal received goes through DLP
video processor and becomes progressive
red, green and blue (RGB) data. Then like
other digital devices the progressive colors
are formatted into entire binary bit planes
of Data.
DLP PROJECTOR
DLP CHIP
DLP LIGHT PROJECTION:-
DLP FEATURES:• Clarity (by minimizing the gaps between
pixels in projector image,DLP projector
system creates a seamless digital picture
that’s sharp at any size).
• Brightness (Due to the mirror system, they
use light more efficiently).
• Color (eight time greater then analogue
projection system.)
DLP FEATURES:• Reliability (DLP is totally digital and it’s not
susceptible to heat, humidity, vibration
and any other environmental factors).
• Minimum maintenance.
• Life span (the DMD is very reliable, no
maintain or alignment is required. DLP
lamp can work for 8000Hr.costs around
$250 to replace).
ONE OR THREE CHIP
PROJECTOR:• One-chip DLP systems use a projection
lamp to pass white light through a color
wheel that sends red-green-blue colors to
the DMD chip in a sequential order to
create an image on-screen. Only one
DMD chip is used to process the primary
RGB colors.
THREE CHIP PROJECTOR:• Three-chip DLP systems use a projection
lamp to send white light through a prism,
which creates separate red, green, and
blue light beams. Each beam is sent to
their respective red, green, and blue DMD
chip to process the image for display onscreen.
ONE CHIP PROJECTION:-
THREE CHIP PROJECTION:-
CINEMA IN DLP:• The DLP projector has the refresh rate double
as the analog system. Films are recorded at
24Hz, which is sufficient to achieve the effect of
motion but it has flickers. To avoid this DLP
projector has 48Hz refresh rate, hence greatly
mitigates flickers.
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DLP cinema projection technology allows us
to display images at any frame rate. This is
done using the control versatility of DMD, which
allows independent control of every bit. Thus
human eye can’t judge the flickers.
ADVANTAGES OF DLP:•
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High speed image creation then other
projectors.
Noise free.
High perceived resolution (consistent picture
quality).
Brighter.
Sharper (Exact mirror image of an incoming
video or graphic signal resulting in projection
that’s seamless at any resolution).
ADVANTAGES OF DLP: Versatile.
 More reliable (display system using DLP
technology are able to recreate their
incoming source material with each
projection, ensuring a full-impact
projection experience that will not fade
over time).
 Consistent picture quality.
DISADVANTAGES OF DLP:• Rainbow effect a major problem.
DISADVANTAGES OF DLP:• Due to the rapid change in color causes
eye strain and headaches, which may
hamper the viewer.
• In single chip projector system at any
instant the on screen image is not total. So
picture quality is not as the original image.
APPLICATION OF DLP:•
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This projector can be used as home
theatre, television and film projection.
Other application includes its highdefinition image creation are photo
finishing, three dimensional visual
display, microscope, spectroscope and
medical imaging.
DLP VS LCD
 DLP has much higher pixels then LCD called “fill
factor”. Due to this fill factor the DLP gives a
much good image as original image and it gives
a good resolution to the image.
 DLP produces much smoother image as
compared to the LCD system.
 DLP has high contrast ratio and efficient use of
light.
 Light efficiency of DLP is more then LCD.
DLP VS LCD:-
CONCLUSION:•
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Understand it.
Plan it.
Implement it.
Use it.
Refine it and
Support it.
THANK U……..