Presentation on Display technologies

1. Display Technologies
Represented By:
Subhajit Das

2. Display
 A display device is an output device for presentation of
information in visual or tactile form.
 When the input information is supplied as an electrical
signal, the display is called an electronic display.
Types of Display
 Segment Display
 Full-area 2-dimensional
 Three-dimensional
 Mechanical

3.  Seven-segment display (most common, digits only)
 Fourteen-segment display
 Sixteen-segment display
 LCDs.
Segment Display

4. 7 Segment
7 Segment 4 Digit 7 Segment

5. 7 Segment Structure
7 Segment

6. 14 Segment
14 Segment 4 Digit 14 Segment

7. 16 Segment
16 Segment 4 Digit 16 Segment

8. LCD Segment Display
LCD Segment Panel

9. Full-area 2-dimensional
LCD 2D Panel

10. 2D Pixel Array
LCD 2D Panel

11. 3-dimensional
 Swept-volume display
 Holographic display
 Varifocal mirror display
 Emissive volume display
 Laser display
 Light field displays

12. Swept-volume working

13. Swept-volume display

14. Holographic display
Holographic 3D

15. Holographic display

16. Underlying Technologies
 Liquid Crystal Display (LCD)
Thin Film Transistor (TFT)
In-Plane Switching (ISP)
 LED-lit LCD
 Light Emitting Diode (LED)
 Plasma
 E-Ink

17. LCD display
• LCD utilize two polarizing material sheet with a liquid crystal
solution between them.
• A current through the liquid causes the crystals to align, so that
light cannot pass through them.
• Each crystal, therefore, is like a shutter, either allowing light to
pass through or blocking the light.
• LCD Uses Cold cathode fluorescent (CCFL) lamps for backlight.

18. LCD Display
LCD display structure

19. LCD Colour display (pixel)

20. LED Backlit LCD Display
• Edge-lit LEDs - in which the LEDs are formed around the rim
of the screen, using a special diffusion panel to spread the
light evenly behind the screen (the most common use).
• LED backlighting (Full array) - behind the screen, whose
brightness is not controlled individually.
• Dynamic “local dimming” backlight - LEDs controlled
individually (or in clusters) to control the level of light/color
intensity in a given part of the screen.
An LED-backlit LCD is a flat panel display which uses LED
backlighting instead of the cold cathode fluorescent (CCFL)
backlighting used by most other LCDs.

21. LED Matrix Display
An LED display is a flat panel display, which uses an array of
light-emitting diodes as pixels for a video display.

22. OLED
• An organic light-emitting diode (OLED) is a light-emitting
diode (LED) in which the emissive electroluminescent layer is
a film of organic compound that emits light in response to an
electric current.
• This layer of organic semiconductor is situated between two
electrodes; typically, at least one of these electrodes is
transparent.
• OLEDs are used television screens, computer monitors,
portable systems such as mobile phones, handheld game
consoles and PDAs.

23. OLED Structure
Schematic of a bilayer OLED: 1. Cathode (−), 2. Emissive
Layer, 3. Emission of radiation, 4. Conductive Layer, 5.
Anode (+)

24. Flexible OLED

25. AMOLED
• An AMOLED display consists of an active matrix of OLED
pixels generating light (luminescence) upon electrical
activation that have been deposited or integrated onto a
thin-film transistor (TFT) array, which functions as a series of
switches to control the current flowing to each individual
pixel.

26. AMOLED Panel

27. Flexible AMOLED

28. Plasma Display
• “Plasma" displays because they use small cells containing
electrically charged ionized gases, which are plasmas.

29. E-Ink display
Kindle Screen (Zoomed)E-Ink Screen

30. E-Ink display Working

31. Conclusion
 Displays are becoming slimmer and more portable
 Holography and flexible displays are expected to set
future.
 Virtual reality will be a feasible option.

32. Thank
You