Please send us a copy of your articles, paper, etc with our images when
those are published.
| Takao Someya |
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Associate Professor,
Quantum Phase Electronics Center,
School of Engineering, University of Tokyo
Phone@+81-3-5841-6820, 6822
Fax@+81-3-5841-6828
someya@ap.t.u-tokyo.ac.jp |
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2.06MB |
90KB |
The photo shows how the sheet image scanner can take an image of a label on a bottle of wine. |
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2.31MB |
131KB |
The photo shows how the sheet image scanner can conform to the bent page
of a book.. |
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2.37MB |
119KB |
The photo shows how the sheet image scanner is suitable for taking an image
of fragile, historical and invaluable documents. |
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1.85MB |
92KB |
The image shows a large-area, flexible, and lightweight sheet image scanner
consisting of organic transistors and organic photodiodes, which is placed
on a business card under ambient light for capturing an image of the card.
The sheet has no optical or mechanical parts. |
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1.48MB |
66KB |
The image shows a large-area, flexible, and lightweight sheet image scanner
consisting of organic transistors and organic photodiodes, which is placed
on a business card under ambient light for capturing an image of the card.
The sheet has no optical or mechanical parts. |
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MOVIE1:Mechanical and electical scans
In conventional scanners, a linear array of photodetectors is moved from
the top to the bottom of a page to capture images or characters. In the
new design demonstrated by Someya and coworkers, a two-dimensional array
of organic photodiodes coupled with organic transistors is used. Instead
of a line by line mechanical scanning procedure, the signal of the photodiodes
is read out by electrically probing the organic transistors, avoiding the
need to use any movable part. As a result, the device is thin, lightweight,
and mechanically flexible. |
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MOVIE2(a):@Principle (a)
Two-dimensional array of photo detectors manufactured on plastic film cannot
distinguish black and white if all incident light reaches to the active
layers of photo detectors. |
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MOVIE2(b): Principle (b)
Here we prepared light-shielding layer to protect photo detectors to be
exposed to direct incident light. |
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MOVIE2(c):@Principle (c)
Now direct incident light cannot reach to the active layers of photo detectors.
The incident light passing though aperture is reflected on white part of
paper and reaches to the active layers, while that on black does go to
the active layers. In this way, the new scanner can distinguish black and
white. |
| From 2005 IEDM Press Kit |
| A Display for the Blind: When we think of computer assistance for the blind, we may think of functions
like synthesized speech and voice recognition. But a research team led
by Dr Takao Someya and Dr Takayasu Sakurai from the University of Tokyo
has developed a plastic sheet that "displays" Braille lettering
by creating arrays of bumps on its rubber-like surface. They are driven
by Braille input, such as from an e-book. The sheet is bendable and carried
in a pocket. Researchers first built an underlying array of organic pentacene
thin-film transistors (TFTs) with top-contact geometry, on PEN or polyimide
plastic substrates. Then, actuators were fabricated from conductive polymer.
When the transistor beneath an actuator feeds voltage to it, the actuator
moves upward. Each actuator has a tiny bubble, or semisphere, attached
to it, which in turn pushes up against and deforms a spot on the surface
film, a thin PDMS film. These actuators are in 2x3 arrays that can form
every Braille letter. The entire 4x4 cm2 display can create a total of
24 Braille letters. This is the first reported integration of active-matrix
organic TFT arrays with plastic actuators, and it opens up great possibilities
for new types of large-area and flexible electronic displays. |
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Press release |
to be uploaded |
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Press interview handout |
to be uploaded |
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High resolution |
Low resolution |
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All images
(zip, 24M) |
All images
(zip, 1.8M) |
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3.5MB |
265KB |
A photo of the world's first Braille sheet display. Some components are
intentionally removed to show the inner structures. A transistor film,
sheet actuator and frame covered by a rubber-like surface are laminated
together. |
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2.8MB |
304KB |
A photo of the world's first Braille sheet display. It is thin, lightweight,
and flexible. |
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4.8MB |
316KB |
A photo of the world's first Braille sheet display. |
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5.0MB |
337KB |
A photo of the world's first Braille sheet display. Some components are
intentionally removed to show the inner structures. A transistor film,
sheet actuator and frame covered by a rubber-like surface are laminated
together |
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5.1MB |
345KB |
A photo of the world's first Braille sheet display. Some components are
intentionally removed to show the inner structures. A transistor film,
sheet actuator and frame covered by a rubber-like surface are laminated
together |
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2.0MB |
191KB |
The image shows a large-area, flexible, and lightweight sheet Braille display
consisting of organic transistors and ionic conductive polymer actuators.
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1.0MB |
110KB |
A photo of the device assembly. Some components are intentionally removed
to show the inner structures. A transistor film, sheet actuator and frame
covered by a rubber-like surface are laminated together |
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wmv 1.8MB |
Upon request, we will send you high-vision DVD. |
This video shows how the sheet Braille display works. It also contains
the reading experiment with a blind person. |
| Copyright 2003-2004 Takao Someya Group |
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