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1. Made by
Sukanya Mukherjee
04121202011
Respective Teacher Guide
Ms. Sweety Dabas

2. Visual Images
 A screenless display that is visible to
anyone who is looking can be projected
as a hologram or onto a clear surface like
the windshield of a car or aircraft.
 A hologram is the most common
example of visual image screenless
display.
 Arguably, virtual reality goggles (which
consist of two small screens but are
nonetheless sufficiently different from
traditional computer screens to be
considered screenless) and Heads-up-
display in jet fighters (which display
images on the clear cockpit window) also
are included in Visual Image category.
 In all of these cases, light is reflected off
some intermediate object (hologram,
LCD panel, or cockpit window) before it
reaches the retina. In the case of LCD
panels the light is refracted from the
back of the panel, but is nonetheless a
reflected source.

3. Visual Images
examples
 Hologram/Holography—is a technique that allows the
light scattered from an object to be recorded and later
reconstructed so that it appears as if the object is in the
same position relative to the recording medium as it was
when recorded. The image changes as the position and
orientation of the viewing system changes in exactly the
same way as if the object were still present, thus making
the recorded image (hologram) appears three
dimensional . May bring more jobs to the movie
business.
 Projection on window-

4.  This photo shows how the images you are seeing do not rely
on surfaces of any kind. These images are projected threw air
molecules. These images are not limited to being just seen
indoors but outdoors as well. However the image quality is
affected if it is windy or rainy or especially sunny outside.

5. Retinal Display •With a retinal display, light is not reflected
off an immediate object, like in a visual image,
but it is projected directly onto the retina.
•This can be handy, one is not limited by
physical screen size , Because there is no
immediate object to be viewed, retinal display
can be used to keep things safe from snooping
eyes.
• The image can take up the entire field of
vision. We’ve seen the potential of retinal
displays in movies like Terminator. For a flesh-
and-blood person the device can be as simple
as eyeglasses.
•Light projected directly to
retina
•Prevents snooping
•Not limited by physical
size

6. On the right is the image of
Screen less touch screens
mini projector which puts a
10 inch touch screen on any
flat surface and on below it
is bluetooth laser virtual
keyboard
This is the future of
technology,
This technology is also
considered for future I
phones, in which the
keypad is projected on
the table adjacent to the
surface where the phone
is kept.
Virtual keyboard

7. Reflected Light
How Vision works
Object
Image
We can see things because of reflected
light. Light bounces off of an object
and enters our eye. This light then
focuses on the retina to form an image.

8. Examples
 Google Glass:
o The first screen-less display that needs mentioning is Google
Glass. This device has been tested for the past year, and some
lucky individuals have even got their devices already. Google
Glass sits on the face like a pair of glasses, and on one eye it has a
block of glass that allows you to see augmented reality. Images can
be displayed right in front of your eye, as well as text
and information about objects and places that are in front of you.
This technology is only in its early stages, but definitely shows that
screen-less displays will become a natural form of
media consumption in the future.
o It is expected that Google Glass will become fully commercially
available in 2014, and some minor changes have been made
recently with the design. Namely, the bone audio system, which
provides audio by vibrating the bones in your face, has been
replaced with a single headphone. It is reported that this is a result
of the bone audio technology producing too low a volume.

9.  Oculus Rift:
o It is an amazing piece of kit that is already available to
purchase. This is a headset that completely blocks out the
real world, and instead replaces what you see with a pre-
programmed image.
o This is the ultimate virtual reality machine that displays
video and appropriate sounds, and uses its accelerometer to
ensure that it feels totally real. If you move your head left,
you will see the image that is to the left in the virtual reality
scenario.
o This kind of technology has a plethora of uses, and today it is
constantly being updated and improved to provide you with
the very best in screen-less display technology.

10. Oculus Rift and Google Glasses

11. Projected Image
Retinal Projection
Projector
Image
In retinal projection, the light
does not have to be reflected off of
an object. The light is projected
directly onto the retina to form an
image.

12. Synaptic Interface
 Brain Computer Interface or BCI
 Like cochlear implant for the ears
 No light projection
 Image sent straight to brain
•Achieved only in horseshoe
crabs.
•Could be used to give vision
to the impaired in the near
future.
•The Geordie LaForge
character (played by LaVar
Burton) in Star Trek: The
Next Generation wore such a
device.

13. Camera
sends
images to
electrode
implant
•A camera that might
be incorporated into
eyeglasses picks up
images.
•These images are
sent to an electrode
implanted in the
brain.
•The brain can then
interpret these
signals, thus creating
artificial sight.
•This can be used to
provide vision who
have a defect of the
eye by bypassing the
damaged eye parts
and sending a visual
signal straight to the
brain.