28-01-2010, 09:17 PM
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Abstract
ELECTRONICS PAPER DISPLAY
It is also called e-paper, Electronic ink or e-ink, is a
display technology using organic electronics
designed to mimic the appearance of regular ink on
paper. Unlike a conventional flat panel display,
which uses a backlight to illuminate its pixels,
electronic paper reflects light like ordinary paper and
is capable of holding text and images indefinitely
without drawing electricity or using processor power,
while allowing the paper to be changed. One
important feature needed is that the pixels be bistable
so that the state of each pixel can be maintained
without a constant supply of power.
Introduction:
An Electronic Paper Display is also known as EPD.It is a display
device that possess a paper-like high contrast appearance, ultra-low
power consumption, and a thin, light form. It gives the viewer the
experience of reading from paper, while having the power of
updatable information.
HISTORY
¢ Electronic paper was first developed in the 1970s by Nick
Sheridon at Xerox's Palo Alto Research Center. The first
electronic paper, called Gyricon, consisted of tiny, statically
charged balls that were black on one side and white on the
other. The "text" of the paper was altered by the presence of
an electric field, which turned the balls up or down.
¢ In the 1990s another type of electronic paper was invented by
Joseph Jacobson, who later co-founded the corporation E Ink
which formed a partnership with Philips Components two
years later to develop and market the technology.
TECHNOLOGY USED
¢ The basic material used in the electronic paper display is
ELECTRONIC INK.
¢ Electronic ink is a proprietary material that is processed into
a film for integration into electronic displays. Although
revolutionary in concept, electronic ink is a straightforward
fusion of chemistry, physics and electronics to create this
new material.
BLOCK DIAGRAM
¢ The principal components of electronic ink are millions of
tiny microcapsules, about the diameter of a human hair. In
one incarnation, each microcapsule contains positively
charged white particles and negatively charged black
particles suspended in a clear fluid. When a negative electric
field is applied, the white particles move to the top of the
microcapsule where they become visible to the user. This
makes the surface appear white at that spot.
¢ At the same time, an opposite electric field pulls the black
particles to the bottom of the microcapsules where they are
hidden. By reversing this process, the black particles appear
at the top of the capsule, which now makes the surface
appear dark at that spot. To form an E Ink electronic display,
the ink is printed onto a sheet of plastic film that is laminated
to a layer of circuitry.
¢ The circuitry forms a pattern of pixels that can then be
controlled by a display driver. These microcapsules are
suspended in a liquid "carrier medium" allowing them to be
printed using existing screen printing processes onto virtually
any surface, including glass, plastic, fabric and even paper.
Ultimately electronic ink will permit most any surface to
become a display, bringing information out of the confines of
traditional devices and into the world around us.
POLYCHROME E-PAPER
¢ Simple colour e-paper consists of a thin coloured optical
filter added to the monochrome technology described above.
The array of pixels is divided into triads, and the display is
then controlled like any other electronic colour display.
COMPETING DISPLAY TECHNOLOGIES
¢ LCDs
¢ CRTs
¢ Micro displays
¢ Organic LEDs
¢ Field emission displays
¢ Plasma displays
ADVANTAGE
¢ Paper-like readability
Sunlight and non-uniform light visibility
High reflectivity , high contrast & resolution
Viewing angle ~180 degree
Highly flexible
¢ Ultra “ Low Power Consumption
Long-term Bi-stable Image “ content preserved without
power
Prolonged battery life
Capable of color & video
ADVANTAGE OVER OTHER DISPLAY MATERIAL
¢ Highlights of this display include a thickness of 300 microns
and is reported as flexible as construction paper. The 10.1
inch display has a resolution of 600×800 and a pixel density
of 100 pixels per inch. Most LCD / CRT monitor displays
have a pixel density of 72-96 PPI. The contrast ratio is at a
low 10:1 and the display can show 4 levels of grey. While
this seems low, it is more than adequate for reading in well
lighted conditions.
DRAWBACK
¢ Very low switching speed
¢ Electrochemical complexity
¢ Slow response to change
¢ Too slow for video
PRODUCTION PROBLEM
¢ Ink too slow,not bright enough
¢ Problems in extremes temperatures,humidity
¢ Varied from batch to batch
¢ Yeilds unstable
¢ Coatings inconsistent
¢ Lamination had bubbles
APPLICATION
¢ EPDs are ideal for many consumer and industrial
applications where the reading experience and range of
lighting and viewing angles are of the utmost importance.
Transportation signage can be utilized in a myriad of
locations previously impossible due to sunlight or viewing
angle.
¢ eBooks that strained the eye with their emissive light can
now give the reader the true book-like experience. Cell phone
screens that had to be shaded and turned continuously for a
glimpse of the numbers now have high contrast and
brightness in the widest of lighting conditions. EPDs give
power to product designers to use their imagination in ways
never before possible.
¢ Beyond today's generation of technology which offers the
visual look of paper (in terms of contrast, brightness and
viewing angle), future versions will integrate E Ink's flexready
products with plastic electronics [link to flexible
displays page] being developed by several companies
including a Philips spin-off called Polymer Vision, Epson,
and UK-based Plastic Logic. The integration of these two
technologies will allow something that not only has the look
of paper, but is also much closer to its form - thin, light,
flexible, rollable.
Abstract
ELECTRONICS PAPER DISPLAY
It is also called e-paper, Electronic ink or e-ink, is a
display technology using organic electronics
designed to mimic the appearance of regular ink on
paper. Unlike a conventional flat panel display,
which uses a backlight to illuminate its pixels,
electronic paper reflects light like ordinary paper and
is capable of holding text and images indefinitely
without drawing electricity or using processor power,
while allowing the paper to be changed. One
important feature needed is that the pixels be bistable
so that the state of each pixel can be maintained
without a constant supply of power.
Introduction:
An Electronic Paper Display is also known as EPD.It is a display
device that possess a paper-like high contrast appearance, ultra-low
power consumption, and a thin, light form. It gives the viewer the
experience of reading from paper, while having the power of
updatable information.
HISTORY
¢ Electronic paper was first developed in the 1970s by Nick
Sheridon at Xerox's Palo Alto Research Center. The first
electronic paper, called Gyricon, consisted of tiny, statically
charged balls that were black on one side and white on the
other. The "text" of the paper was altered by the presence of
an electric field, which turned the balls up or down.
¢ In the 1990s another type of electronic paper was invented by
Joseph Jacobson, who later co-founded the corporation E Ink
which formed a partnership with Philips Components two
years later to develop and market the technology.
TECHNOLOGY USED
¢ The basic material used in the electronic paper display is
ELECTRONIC INK.
¢ Electronic ink is a proprietary material that is processed into
a film for integration into electronic displays. Although
revolutionary in concept, electronic ink is a straightforward
fusion of chemistry, physics and electronics to create this
new material.
BLOCK DIAGRAM
¢ The principal components of electronic ink are millions of
tiny microcapsules, about the diameter of a human hair. In
one incarnation, each microcapsule contains positively
charged white particles and negatively charged black
particles suspended in a clear fluid. When a negative electric
field is applied, the white particles move to the top of the
microcapsule where they become visible to the user. This
makes the surface appear white at that spot.
¢ At the same time, an opposite electric field pulls the black
particles to the bottom of the microcapsules where they are
hidden. By reversing this process, the black particles appear
at the top of the capsule, which now makes the surface
appear dark at that spot. To form an E Ink electronic display,
the ink is printed onto a sheet of plastic film that is laminated
to a layer of circuitry.
¢ The circuitry forms a pattern of pixels that can then be
controlled by a display driver. These microcapsules are
suspended in a liquid "carrier medium" allowing them to be
printed using existing screen printing processes onto virtually
any surface, including glass, plastic, fabric and even paper.
Ultimately electronic ink will permit most any surface to
become a display, bringing information out of the confines of
traditional devices and into the world around us.
POLYCHROME E-PAPER
¢ Simple colour e-paper consists of a thin coloured optical
filter added to the monochrome technology described above.
The array of pixels is divided into triads, and the display is
then controlled like any other electronic colour display.
COMPETING DISPLAY TECHNOLOGIES
¢ LCDs
¢ CRTs
¢ Micro displays
¢ Organic LEDs
¢ Field emission displays
¢ Plasma displays
ADVANTAGE
¢ Paper-like readability
Sunlight and non-uniform light visibility
High reflectivity , high contrast & resolution
Viewing angle ~180 degree
Highly flexible
¢ Ultra “ Low Power Consumption
Long-term Bi-stable Image “ content preserved without
power
Prolonged battery life
Capable of color & video
ADVANTAGE OVER OTHER DISPLAY MATERIAL
¢ Highlights of this display include a thickness of 300 microns
and is reported as flexible as construction paper. The 10.1
inch display has a resolution of 600×800 and a pixel density
of 100 pixels per inch. Most LCD / CRT monitor displays
have a pixel density of 72-96 PPI. The contrast ratio is at a
low 10:1 and the display can show 4 levels of grey. While
this seems low, it is more than adequate for reading in well
lighted conditions.
DRAWBACK
¢ Very low switching speed
¢ Electrochemical complexity
¢ Slow response to change
¢ Too slow for video
PRODUCTION PROBLEM
¢ Ink too slow,not bright enough
¢ Problems in extremes temperatures,humidity
¢ Varied from batch to batch
¢ Yeilds unstable
¢ Coatings inconsistent
¢ Lamination had bubbles
APPLICATION
¢ EPDs are ideal for many consumer and industrial
applications where the reading experience and range of
lighting and viewing angles are of the utmost importance.
Transportation signage can be utilized in a myriad of
locations previously impossible due to sunlight or viewing
angle.
¢ eBooks that strained the eye with their emissive light can
now give the reader the true book-like experience. Cell phone
screens that had to be shaded and turned continuously for a
glimpse of the numbers now have high contrast and
brightness in the widest of lighting conditions. EPDs give
power to product designers to use their imagination in ways
never before possible.
¢ Beyond today's generation of technology which offers the
visual look of paper (in terms of contrast, brightness and
viewing angle), future versions will integrate E Ink's flexready
products with plastic electronics [link to flexible
displays page] being developed by several companies
including a Philips spin-off called Polymer Vision, Epson,
and UK-based Plastic Logic. The integration of these two
technologies will allow something that not only has the look
of paper, but is also much closer to its form - thin, light,
flexible, rollable.
