This document discusses different types of screenless displays, including visual image spatial displays like holograms, virtual retinal displays which project images directly onto the retina, and synaptic interfaces which send images directly to the brain. It provides details on how holograms and virtual retinal displays work, when virtual retinal displays were invented, and their advantages over other methods. The conclusion emphasizes that future technologies can improve life and enable independent living when applied effectively.

1. Presented by-
SHAKIL MUHAMMAD
UET PESHAWAR
PAKISTAN

2. Screenless
Display

3. Introduction
Display without screen
Display directly into retina of
eye
One of the TOP 10 emerging
technologies in IT field.

4. Types of Screenless Display
Visual Image
SD
Synaptic
Interface
Retinal
Direct
Display

5. Visual Image SD
 Working
◦ Illuminating with lasers
◦ Display in A darkened room
◦ two-dimensional surfaces make 3D View
 Example,
◦ Hologram

6. Working Of Hologram

8. More about Hologram
 Different angles of viewer makes objects from
different perspectives just like real object.
 Appear to move as viewer walk and look at
them from different angles.
 Changes colors or include views of completely
different objects, depending on how you look at
them.

9. Virtual Retinal Display
 Images are projected directly onto the retina of
eye
 Unlike Visual Image SD, no reflection of light is
needed from an intermediate object onto the
retina
 The user sees what appears to be a
conventional display floating in space in front of
them.

10. Schematic Diagram of VRD

12. Historical Background
The VRD was invented at the
University of Washington in the
Human Interface Technology Lab in
1991.

13. More about VRD
 Contains adaptive optics that correct
irregularities in the eye.
 Unlike Visual Image SD, it can be viewed
daytime too

14. Synaptic Interface
 No light---- No Eye Display
 Uses Brain computer interface
 Image is send directly to brain without
the use of eye

16. Synaptic Interface - Diagram
Camera

17. 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.

18. Q???????

19. ThankS!