this is a presentation on AMOLED(active matrix organic LED).after reading this you can know about what is AMOLED and how it works?. you can also know the principle and component of AMOLED and manufacturing process of AMOLED.it also contain the advantages,application ,disadvantages and future scope with conclusion.

1. A
SEMINAR
PRESENTATION
ON
AMOLED(Active matrix organic light emitting diode)
Presented To:-
Prof. aswathhi puthhukulam
Presented By:-
JITENDRA KUMAR
ROLL NO.-12EJIEC045
SECTION –C(C3)
1

2. CONTENT
 Introduction
 Principle
 AMOLED Components
 Working
 Manufacturing of AMOLED
 Comparison
 Applications
 Advantages
 Disadvantages
 and future prospects
 Conclusion
2

3. INTRODUCTION
 Active-Matrix OLED (Active-matrix organic
light-emitting diode or AMOLED) is a display
technology .
 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
3

4.  They are deposited in rows and columns onto a
flat carrier by a simple printing process.
 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
4

5. PRINCIPLE
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
5

6. AMOLED COMPONENT :
Cathode
Emissive layer
Conducting layer
Anode
Substrate
TFT
6

7.  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
7Working

8. Working: 8

9. Manufacturing Of
AMOLED
The biggest part of manufacturing
AMOLEDs is applying the organic layers
to the substrate. This can be done in three
ways:
 Vacuum deposition or vacuum thermal
evaporation (VTE)
 Organic vapor phase deposition (OVPD)
 Inkjet printing
9

10. AMOLED LCD PLASMA
• Potentially the lowest cost. • Medium cost. • Highest cost
• Consumes lowest power • Lower Power consumption
than plasma
• Highest power
consumption
• Self emissive. • Requires backlight. • Requires backlight.
• Displays wider color range. • Color range not good. • Displays a very deep
black.
• No screen burn potential • No screen burn potential • Screen burn potential
• Shorter overall lifetime • Backlight bulb typically
requires replace at around 30 k
hours
• Half life ~60k hours
Comparison: 10

11. Comparison between AMOLED and TFT Display
Figure 2 – TFT Display
AMOLED has less
complexity so is much
thinner
11
Figure 1 - AMOLED

12. APPLICATIONS
Cellular/mobile phones
MP3 players
Digital camera
AMOLED TV
TABLET / PC
12

13. Some of the Present Gadgets 13

14. ADVANTAGES
1. Thinner ,lighter and flexible
14

15. AMOLED LCD TFT
<50uS
3000~30000uS
Fast response time means full
motion graphics can be displayed
152. FAST Response Time

16. AMOLED TFT 16
3. High Contrast Ratio
4. Less Power Consumption:-AMOLED power consumption depends
on image content & application.
5. Large viewing angle
6. Brightness

17. DISADVANTAGES
•Limited Lifetime
•Expensive manufacturing process
•Easily damaged by Water
•Fabrication of substrate is complex
17

18. FUTURE PROSPECTS
 Curved AMOLED
displays
 Wearable AMOLEDs
 Transparent
AMOLEDs embedded
in windows
 AMOLEDs in car
windshields
 Realizing Concept
models of various
mobile devices
18

19. 19
FUTURE USE OF AMOLED

20. CONCLUSION
 Limited use caused by degradation of
materials.
 AMOLED will replace current LED and
LCD technologies
 Flexibility and thinness will enable many
applications
20

21. THANK YOU 21
Thank You