Post on 14-Apr-2018
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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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