Screenless display technology projects images directly onto the retina, without a physical screen. It can produce higher resolution than screens and has a wider viewing angle. Virtual retinal display (VRD) projects light directly onto the eyes' retinas, allowing users to see floating images. While the technology is still in development, VRDs could someday be lighter, more portable displays with greater brightness and contrast than existing screens.

1. Screenless
Display

2. Introduction
• Screenless display technology has the
main aim of displaying (or) transmitting
the information without any help of the
screen (or) the projector.
• It displays the information directly into
the retina of eye rather than displaying
through screen like LCD monitor, Touch
Screen Display, etc.
• It is one of the TOP 10 emerging
technologies in IT field.
• We will be using Screenless display
technology during 2020’s.

3. Types of Screenless Displays
Screenless
Display
Visual Image
Screenless Display
Synaptic Interface
Retinal Direct
Display

4. Visual Image
• Visual Image screen less display includes any screen less
image that the eye can perceive or see.
• Example: Hologram
• It is made by illuminating with lasers or display in a
darkened room with carefully directed lighting.
• They're two-dimensional surfaces that show absolutely
precise, three-dimensional images of real objects.
• If you look at these holograms from different angles, you
see objects from different perspectives, just like you would
if you were looking at a real object. Some holograms even
appear to move as you walk past them and look at them from
different angles. Others change colors or include views of
completely different objects, depending on how you look at
them.

5. Working of Hologram

6. Products of Visual Screen
• air touch system.

7. air touch system.
• It works by projecting laser
beem into humid air molecules.
• We have to move our hands our
the humid air where the display
is present.

8. Virtual retinal display

9. Working of VRD

10. Virtual retinal display
• They are screen less displays in which images
are projected directly onto the retina of eye
• They are distinguished from visual image
systems because light is not reflected from
some intermediate object onto the retina.
• It is instead projected directly onto the
retina.
• The user sees what appears to be a
conventional display floating in space in
front of them.

11. Working of VRD

12. Virtual retinal display
• The VRD was invented at the University of
Washington in the Human Interface Technology
Lab in 1991.
• The development of high-brightness LEDs have
made the displays bright enough to be used
during the day and adaptive optics have
allowed systems to dynamically correct for
irregularities in the eye.
•

13. Products using VRD
GLYPH1.

14. GLYPH

15. GLYPH
Avegant can achieve only 45 degree Field of view

16. GLYPH
• Avegant is currently in the process of
refining their Glyph Alpha prototype into
the consumer version.
• Avegant Glyph Beta to be released early
2015.
• It displays video via HDMI connection
• It has 3 hours of video viewing battery
life and Audio via Bluetooth and TRRS jack

17. Rift
• It uses a OLED display
to eliminate motion blur
and judder, two of the
biggest contributors to
simulator sickness.
• Low persistence makes
the scene appear
visually stable,
increasing the potential
for presence.

18. 2.
• Oculus VR is still in Prototype Stage
• It is used for playing immersive games
• We can play games in 360 degree Head
Tracking.
• The Oculus Rift creates a stereoscopic 3D
view with excellent depth, scale, and
parallax.
• Oculus Rift provides an approximately
100° field of view

19. Synaptic Interface

20. Camera sends images
to electrode implant

21. Synaptic Interface
• Synaptic Interface screen less video does
not use light at all.
• Visual information completely bypasses the
eye and is Transmitted directly to the
brain. While such systems have yet to be
implemented in humans,
• success has been achieved in sampling
usable video signals from the biological
eyes of a living horseshoe crab through
their optic nerves,
• In sending video signals from electronic
cameras into the creatures' brains.

22. Advantages Screenless Display
• Low power requirements- Only six diodes are required
and a few of a watts to deliver their images to the
user’s eyes.
• Higher resolution images- The pixels in the images
projected by the diodes can be made smaller than is
possible with any CRT or flat panel display, so
higher resolution can be achieved. With retinal
projectors, the only limitation in the resolution of
visual images will be the resolving power of the
users’ eyes.
• Greater portability- The combination of diodes,
lenses, and processing components in a retinal
projector system will weigh only a few ounces.

23. Advantages Screenless Display
• Wider angle of view- Retinal projectors
will be able to provide a wider field of
view than is possible with display screens.
• Greater brightness and better contrast-
Retinal projectors can provide higher
levels of contrast and brightness than any
other display system.

24. Disadvantages Screenless Display
• The principle disadvantage is that
Virtual retinal display (VRD) is not
yet available in the significan
number.
• Prototypes and special experimental
models are now being Built, but their
cost per unit is high.
• The VRD technology is still under
progress and Development.

25. Conclusion
• The future technologies makes our
life even better for the development
of mankind in all aspects of life.
• We should effectively apply these
technologies in reasonable
situations and make life easier.
• Physically and Mentally challenged
people also have to be equipped with
latest technologies, to enable them
to live a peaceful life.