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MAHARANA PRATAP UNIVERSITY OF AGRICULTURE & TECHNOLOGY

COLLEGE OF TECHNOLOGY AND ENGINEERING, UDAIPUR

DEPARTMENT OF

ELECTRONICS AND COMMUNICATION ENGINEERING

A SEMINAR ON TRANSPARENT DISPLAY

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The transparent display is general term for display

having the property whose bake of the screen is seen

since the display itself has a certain degree of

permeability.

Display that allows the user to see what is shown on the

glass screen while still being able to see through it. It is a

technology that has been around for a decade or two, but

only this year is it being incorporated by companies such

as Samsung and Planar systeminto consumer productslike handheld devices, televisions, and other technology.

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The concept of a transparent screen has been inthe works since the early 50s, however, were justnow reaping the benefits of this incredibletechnology.

A transparent screen uses AMOLED technology todisplay colors with no backlight. 1960s - ac-driven electroluminescent cells using doped

anthracene was developed.Anthracene is a solid poly cyclic aromatic hydrocarbonconsisting of three fused benzene rings

In 1987 chin tang and van Slyke introduced the first lightemitting diodes from thin organic layers.

In 1990 electroluminescence in polymers was discovered(PPV).

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AMOLED OLED

LCD

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AMOLED technology works using a TFT or thin film transistor screen

(that doesnt require a backlight) made up of the organic light-

emissive diode pixels to form a matrix. Combined with electrical

energy, the pixels will illuminate the light to display whites and colors.

Blacks are displayed on the transparent screen by in-active pixels.

The thin film transistor is always controlling the current that tells the

pixels how bright to shine.

AMOLED (Active-Matrix Organic Light-Emitting Diode) is a

display technology for use in mobile devices and televisions.

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What is an OLED?

OLED - Organic Light Emitting Diode

An OLED is any light emitting diode (LED) which emissive electroluminescentlayer is composed of a film of organic compounds.

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Architecture of OLEDs

Substrate (clear plastic, glass, foil) - The substrate supports the OLED. Anode (transparent) - The anode removes electrons (adds electron "holes") when a

current flows through the device.

Organic layer:o Conducting layer - This layer is made of organic

plastic molecules that transport "holes" from theanode. One conducting polymer used in OLEDs

is polyaniline.o Emissive layer - This layer is made of organic

plastic molecules (different ones from theconducting layer) that transport electrons from

the cathode; this is where light is made. Onepolymer used in the emissive layer ispolyfluorene.

Cathode (may or may not be transparent depending on the type of OLED) - The cathode

injects electrons when a current flows through the device.

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A typical OLED is composed of a layer of organicmaterials situated between two electrodes, the anodeand cathode, all deposited on a substrate. The organicmolecules are electrically conductive as a result ofdelocalization of pi electrons caused by conjugationover all or part of the molecule. These materials haveconductivity levels ranging from insulators toconductors, and therefore are considered organicsemiconductors. The highest occupied and lowestunoccupied molecular orbitals (HOMO and LUMO) of

organic semiconductors are analogous to the valenceand conduction bands of inorganic semiconductors.

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Current Research for OLEDs

Manufacturers focusing on finding acheap way to produceo "Roll-to-Roll" Manufacturing

Increasing efficiency of blue luminance

Boosting overall lifespan

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Applications of OLEDs

TVs Cell Phone screens Computer Screens Keyboards (Optimus Maximus)

Lights

Portable Divice displays

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Transparent LCD Display:

The LCD utilizes ambient light, with no

internal back lighting requirement. For this

reason, it is more energy efficient, costeffective and reliable than other displays of

similar size.

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Figures are curtsy of 3M

Back-Light

The light generated by thebacklight.

The light is evenlydistributed the light evenlyover the LCD panel.

Display enhancement filmsare placed between the lightdiffuser and the LCD panel.They aim to maximize thelight reaching the observer.

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The transparent LCD enables to look through thedisplay like glass on an exhibit or product behind it.

This provides absolutely new presentationpossibilities for museums, shopping malls where

you can show a product or exhibit and put someadditional information or animation on the LCD. The LCDs can also be equipped with interactive

features like touch systems for example. The product is dedicated for creative people who

make the content for such signage solutions or forAV system integrators who develop a completeconcept.

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SAMSUNG

ORION

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HP

Samsung

Planar display-UCIC Technology

Orion images

Microsoft corporation

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PLANAR LOOKTHRU SERIES SPECIFICATIONS

Model Name TD3200 LT3200

Viewable Size 31.5" Diagonal

Orientation Portrait or Landscape

Viewing Angle (Typical) 178 Horizontal and Vertical

Response Time (G-to-G, Typical) 8 msec

Display Type LCD Active Matrix Flat Panel Display (TFT)

Display Resolution 1366 x 768

Aspect Ratio 16:9

Palette 16.7 million colors

Pixel Pitch 0.511 mm

Refresh Rate 50 to 60 Hz

Video Inputs Digital (HDMI) and Display Port

Compatibility Windows XP, Vista, and 7; Linux, MAC

Power Supply External AC adapter

Power Requirements 100-240 VAC (50/60 Hz)

Power Consumption 125W

Service and Support 3-Year Customer First Warranty featuring

Product Approvals NRTL Listed, FCC-Class A, CE, RoHS

Contrast Ratio (Typical) >1000:1 Contrast is in part determined by display brightness and this will be determined by the design of the enclosure

Brightness(Typical) 350 cd/m Determined by enclosure design

Dimensions(W x H x D) 29.5" x 17.5" x 15.0" 29.9" x 17.8"

Interior Dimensions (W x H x D) 27.25 x 15.25 x 13.5 NA

Access Door Dimension 24.2" x 8.8" NA

Display Weight (w/o stand) Display Weight - 49 lbs (22.3 kg)

Shipping Weight - 56.1 lbs |(25.7 kg)

Display Weight - 12.2 lbs (5.55 kg)

Shipping weight - 33.0 lbs (15.0 kg)

VESA Compatible/Location Built-in 200 x 200 mm VESA, back NA

The customer determines the enclosure

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Advantages of OLEDs

Much faster response time Consume significantly less energy

Able to display "True Black" picture

Wider viewing angles

Thinner display

Better contrast ratio Safer for the environment Has potential to be mass produced inexpensively OLEDs refresh almost 1,000 times faster then LCDs

OLED Displays Vs. LCD and Plasma

OLED Lighting Vs. Incandescent and Fluorescent Cheaper way to create flexible lighting Requires less power Better quality of light (ie. no "Cold Light") New design concepts for interior lighting

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Disadvantages of OLEDs

OLED Displays Vs. LCD and Plasma Cost to manufacture is high Overall luminance degradation Constraints with lifespan

Easily damaged by water Limited market availability

OLED Lighting Vs. Incandescent and Fluorescent

Not as easy as changing a light bulb

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