To know few content about AMOLED Display

1. AMOLED(Active Matrix Organic Light
Emitting Diode)
Submitted by
PONNA CHINNA RAJ
16G01A04C0
Dept. Of ECE
SVPCET, Puttur
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2.  Introduction
 Principle
 AMOLED Components
 Working
 Manufacturing of AMOLED
 Comparison
 Applications
 Advantages
 Disadvantages
 And Future prospects
 conclusion
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CONTENT

3.  AMOLED is type of OLED .
 OLED describes specific type of thin display technology
and Active-Matrix refers to the technology behind the
addressing of pixels.
 An OLED is any LED whose emissive electroluminescent
layer comprises a film of organic compounds
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INTRODUCTION
Active-Matrix OLED (Active-matrix
organic light-emitting diode or AMOLED) is a display
technology

4.  The resulting matrix of pixels can emit light of
different colors.
 AMOLEDs have full layers of cathode, organic
molecules and anode, but the anode layer overlays a
thin film transistor (TFT) array that forms a matrix.
The TFT array itself is the circuitry that determines
which pixels get turned on to form an image.
 The active matrix technology is invented by
Bernard Lechner in 1975
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They are deposited in rows and columns onto a flat carrier by a
simple printing process.

5. Electroluminescence (EL) is an optical phenomenon and
electrical phenomenon in which a material emits light in
response to an electric current passed through it, or to a
strong electric field
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PRINCIPLE

6.  Cathode
 Emissive layer
 Conducting layer
 Anode
 Substrate
 TFT
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AMOLED COMPONENTS

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DAIGRAM
 .

8.  The AMOLED display consists of a matrix of OLED pixels,
each having an anode, cathode and a layer of organic
material between them.
 These pixels are activated by a thin film transistor array which
controls the current to each pixel, enabling it to be activated
and when current flows through it, light is generated.
 Typically two transistors are used for each pixel - one to turn
the charge to the pixel on and off, and a second to provide
the constant current.
 This eliminates the need for the very high currents required
for passive matrix OLED operation
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Working

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Working

10.  Vacuum deposition or vacuum thermal evaporation
(VTE)
 Organic vapour phase deposition (OVPD)
 Inkjet Printing
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Manufacturing Of AMOLED
The biggest part of manufacturing AMOLEDs is applying
the organic layers to the substrate. This can be done in three
ways:

11. .
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.
AMOLED LCD PLASMA
 Medium
cost.
 Potentially the lowest
cost.
 Consumes lowest power
 Lower Power
consumption than plasma
 Requires
backlight. Self emissive.
 Displays wider color
range.
 Color range not
good.
 No screen burn
potential
 Highest cost
 Highest power
consumption
 Requires back light
 Displays a very deep
black
 Screen burn potential No screen burn
potential
 Shorter overall lifetime
 Backlight bulb typically
requires replace at around 30
k hours
 Half life ~60khours
Comparison

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Comparison between AMOLED and TFT Display
 .
AMOLED has less complexity so is much
thinner
AMOLED has less
complexity so is much
thinner

13.  Cellular/mobile phones
 MP3 players
 Digital camera
 AMOLED TV
 TABLET /PC
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APPLICATIONS

14.  .
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Some of the Present Gadgets

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Some of the Present Gadgets
Realme XT One Plus 7 T
Samsung Galaxy M30S

16. 1.Thinner ,lighter and flexible
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ADVANTAGES

17. AMOLED LCD TFT
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2. FAST Response Time

18. AMOLED TFT
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3. High Contrast Ratio
.

19. 3 .Less Power Consumption:-AMOLED power
consumption depends on image content & application.
4. Large viewing angle
5. Brightness
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.

20. 1. Limited Lifetime
2. Expensive manufacturing process
3. Easily damaged by Water
4. Fabrication of substrate is complex
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DISADVANTAGES

21.  Curved AMOLED displays
 Wearable AMOLEDs
 Transparent AMOLEDs
embedded in windows
 RealizingConcept models
of various mobile devices
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FUTURE PROSPECTS

22.  .
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FUTURE USE OF AMOLED

23.  Limited use caused by degradationof materials.
 AMOLED will replace current LEDand LCD
technologies
 Flexibility and thinness will enablemany applications
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CONCLUSION

24. 1.Lin, Chih-Lung; Chen, Yung-Chih. "A Novel LTPS-TFT Pixel
Circuit Compensating for TFT Threshold-Voltage Shift and OLED
Degradation for AMOLED".
2. IEEE Electron Device Letters 28: 129.
DOI:10.1109/LED.2006.889523 [2] Hamer, John W.; Arnold,
Andrew D.; Boroson, Michael L.;
3. Itoh, Masahiro; Hatwar, Tukaram K.; Helber, Margaret J.;
Miwa, Koichi; Levey, Charles I. et al. (2008). "System design for
a wide-color-gamut TV-sized AMOLED display".
4. Journal of the Society for Information Display 16: 3.
DOI:10.1889/1.2835033 [3] Mian Dong; Choi, Y.-S.K; Lin Zhong
(July 2009). "
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References

25. Thank you
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