The KEYWORDS: head-up display, transparent display, retina, semiconductor

The Third Eye is a transparent display
that projects data in front of viewer eye without distracting the actual view of
the user. It projects an image just like head-up display also says Smart Vision
System

The Third Eye display system projects an
image directly onto the human retina with low-energy lasers or LCDs. It can
give the user ‘ the illusion of viewing a typical screen-sized display hovering
in the air several feet away. In principle the technology can provide
full-color, high resolution dynamic displays. It is highly efficient with
respect to power consumption, requiring far less power.

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One of the main tasks in technical
industry is observation of various parameters which includes the use of analog
or digital measuring devices. Continuous monitoring while working on a machine
can sometimes create problem for the engineer or technician. He/she has to
continuously change his/her
focus of vision from the machine to the display of the measuring instrument. If
we are able to integrate it with the measuring instrument then it will create a
safe and easy working environment for the engineer or the technician and avoid
accidents.

The main idea behind such
kind of device would be that it will take data from the instrument and that
data will be displayed on the screen.

This paper describes
the function and implementation of Third Eye device.

 

KEYWORDS: head-up display, transparent display, retina,
semiconductor laser, OLED, arduino, bluetooth, optics,

 

1.     
INTRODUCTION

 

 

From a long
time computer monitor has been the window into the digital universe. The image
in the form of light is projected onto the back of the eyeball i.e. the retina.
The retina then converts the light signals, these then travel through optic
nerve to the brain.

 

 

 

 

Another better
way is that why cannot we paint the image directly onto the retina eliminating that
bulky, power consuming monitor. For this we can use LEDs of special type or
miniature lasers (semiconductor based), one device can be used for the three key
colors (red, yellow, and blue) and thereafter scan the light of those LEDs on
the retina.  By mixing these 3 primary colors
we could create the whole spectrum of human vision. This could be the effective
way to obtain an image into anyone’s brain for obtaining the viewing
situations.

By projecting
the light only to one of your retinas, images might be overlaid on person’s
view of real objects and generating an animated, X-ray-like preview of some
object or innards of that object, such as a car’s machinery,  human body etc. On the other hand, if little
bit differ images were projected into each eye, it may generate intense 3D sights
consisting clean, jewel-like spectral colors. Observers could be observed an intensified
sense of realistic image that LCD goggles may not provide, as   LED- or LASER based system might be
dynamically refocuses to simulate nearby and far objects with absolute realism.

The most
significance of this method is that there could be very less wastage might be
negligible amount of photons therefore it would be superbly matched to the
low-power necessities of mobile devices. Approximately hundreds of times less
power may consume by lasers or LED’s as comparison to small LCD screens of
mobile phone or notebooks etc.

Now consider a
cell phone or a PDA with a small screen, through stimulating your retina when
peered inside it, could produce an image rich in color with its detail. The
image would give an impression to your brain as wide as brightly stricken on to
the display screen 65cm away , which can be reconfigured speedily from , say ,
a traditional boxy 4:3 format to the widescreen 16:9 format.

The indications
of such systems, known as scanned-beam displays, are just now going to hit the
market.

2.      OBJECTIVE

 

 

The objective of the work in this paper is to build a small
wearable and compatible head up display using a small OLED combining an
Arduino, a Bluetooth module, battery with some concept of optics.

The received data from Bluetooth to any other Bluetooth
system is displayed, on the OLED screen. It’s then reflected over the mirror
which is fixed in front of the screen, then the reflected light goes through
the lens and you can see the picture in the little transparent acrylic glass
which is placed in front of the user eye.

Display options will vary and customizable. It depends on the application
that where we are using it.

Many people use the mobile phone while driving motorcycles for
calling, navigation or some other purpose. This may result in accidents. This problem can be reduced by using the head up display in the
helmet.

 

3.      COMPONENTS
OF THE DEVICE

 

It contains three primary components:

 

1.  
The Projection
unit which consist of a plane mirror, a convex lens and an OLED. Plane
mirror is placed in front of the OLED, which is inclined at some angle and the
plane mirror is at the focus of the convex lens.

 

2.  
The Combiner
is an angled flat piece of transparent glass also known as beam splitter located
directly in front of the viewer eye. The glass must be more reflective than the
transmissive. For better and clear image, the ratio between the reflection and
the transmission through the glass is 7:3.

 

3.  
The Computer
i.e. microcontroller that provides the interface between the projection unit
and the systems/data to be displayed. In this device, we are using arduino as
computer that connects the data system with the OLED display. It acts as the
brain of the device.

 

4.      BLOCK
DIAGRAM OF THE THIRD EYE

 

Figure 1

 

The
Third Eye basically consists of a micro-controller that can be of arduino
family or atmega16 or some other family. Here, we are using arduino. It is
interfaced with OLED display, power source and bluetooth. The display projects
an image on the mirror which is placed at some angle in front of the display.
The reflected image passes through the convex lens and finally the refracted
image is shown on the transparent display.

 

 

5.      WORKING OF THE THIRD EYE

 

The process basically involves the phenomenon of optics which is
triggered using embedded system.

 

The working of HUD divided into three sections:

 

·     
Electronics: In electronics
configuration, we are using arduino atmega 328 microcontroller, Bluetooth,
power supply source i.e. rechargeable battery and the charging circuit and
sensors. The data is taken by the sensor in analog form, processed by the
microcontroller and send to the display unit. The display option is customizable.
The collected information stored in the memory for further use or when it is
needed.

 

·     
Light Source: The light
source involves OLED for display, the data pass through a analog to digital
converter that controls the light source.

 

·     
Optics: Optics section
includes assembly of convex lens, plane mirror and the combiner. The plane
mirror is placed at an angle of around 45° in front of the OLED display. It reflects the image of the OLED
display. The reflected image is laterally inverted. It is then focused on the
convex lens which is placed at the focus. It makes the diverging ray of the
mirror into the parallel ray and finally the required image is displayed on the
transparent glass and finally we get the actual data in front of the viewer.

 

6.      CHARACTERISTICS OF THE THIRD EYE

 

It has in common the following characteristics:

 

•     
The
display element is largely transparent.

•     
The
information is projected with its focus at infinity.

•     
It
must be compact and lightweight

 

7.      LEARNING ASSOCIATED FOR YOUNG LEARNERS

This project will teach young minds about the basic idea of
embedded system and implementing them in real life problems moreover they will
learn about the phenomenon of optics.

 

 

8.     
ADVANTAGES
OF THE THIRD EYE

 

·        
It is
highly efficient with respect to power consumption, requiring far less power
than the postage-stamp LCD screens used commonly in today’s mobile devices. It
uses about a microwatt of power.

·        
It provides
a sharp, clear image regardless of external lighting conditions.

·        
It
require a fraction of the hardware of conventional display devices, allowing
for lighter and more elegant mobile devices, in high demand for today’s
electronics market.

·        
Head-up
display shows strong potential to replace LCD screens in cell phones, handheld
computers, handheld gaming systems, and eventually even larger computers such
as laptops.

 

9.      HUD MARKET
ANALYSIS

 

 

 

10.  BENEFITS
AND CHALLENGES

 

       BENEFITS

The major benefit of this project is that
it               can help to avoid
accidents.

Some more benefits are:

1.     
Military aircraft applications include weapons
status and sensor data such as target destination, range, line of sight.

2.     
Automobiles usually offer speedometer, tachometer,
and navigation system display. Night vision information will also be displayed.
It can also be used in motorcycle helmets.

3.     
Medical operations includes patient health status such
as heart beat rate, blood pressure etc.

4.     
Navigation:
Off the bike, your smart phone gives you access to maps, directions and point
of interest which will solve the problems for daily commuters.

5.     
Weather:
It lets you avoid bad weather.

6.     
Telemetry:
See all the data that is important to you without taking your eyes off the road which will
reduce the chances of accidents.

7.     
Communication:
calling system can be accessed while driving.

MAJOR CHALLENGES

·        
Power consumption is one of the major challenges.

·        
It should be compact and light weight so that it is easy to handle.

·        
The optical design will be the most difficult part.

 

11.  APPLICATIONS

 

    
It is used in various fields for

•     
Military
purpose

•     
Aircrafts

•     
Automobiles

•     
Medical
operations

•     
Live
news reading

•     
Video
gaming

•     
displaying information to workers on site locations such
as power stations, airports and events

•     
These displays are discreet and easy to use and are being
used in the field by engineers, security and police forces.

 

12.  FUTURE IMPROVEMENTS

·        
Wireless Integration

·        
Voice Command Functionality

·        
Lighter Components

·        
Reduction of Cost

 

 

13.  FUTURE
SCOPE

 

·        
As
with most hi-tech electronics, head-up displays are set to become smaller and
lighter. Micro Optical is working towards a model that will look no different
to a normal pair of glasses.

·        
In
the near future, head-up displays will be available with Wi-Fi and Bluetooth
connectivity, allowing users to surf the web and check their email on the move.

·        
There
will also be devices that will create full color images that look bigger than a
cinema screen, from a tiny head-mounted or handheld device. This will open up
applications such as augmented vision and augmented reality.

·        
Car
dashboard information could be displayed by such a display, allowing real-time
information on the car, traffic and directions, to be superimposed anywhere in
the driver’s field of view.

·        
Mapping
will take on a new leash of life with augmented reality and GPS technology.

·        
Users
will be able to see a map of their current location displayed right on top of
the real thing. This will aid navigation in cities and the countryside,
allowing street names to appear on every road and virtual sign-posts to lead
you to your destination.

·        
Local
information such as the nearest police or tube station could be overlayed onto
your view along with directions to the nearest cash point or taxi rank.

 

 

14.  CONCLUSIONS

 

•      It is smaller and lighter.

•      Users will be able to see a map of their
current location displayed right on top of the real thing.

•      This will aid navigation in cities and
countryside, allowing street names to appear on every road and virtual
sign-posts to lead you to your destination.

•     
In the near future,
head-up displays will be available with Wi-Fi and Bluetooth connectivity,
allowing users to surf the web and check their email on the move.

•       

 

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