The document discusses interferometric modulator displays (IMODs), a new display technology that uses microelectromechanical systems (MEMS) to produce colors through interference of light. IMODs use an array of artificial microstructures that can switch between a bright color state and a dark state extremely fast, providing video-rate capability. This gives IMODs advantages over other displays like lower power consumption and consistent contrast. The document outlines how IMODs work, how they generate color, and their potential applications in devices like phones, MP3 players, and more.

1. INTERFEROMETRIC MODULATOR DISPLAY
(IMOD):mirasol
0501212311
BY:
BY:
ANKITA
SINHA
SINHA
ECEBRANCH ,
:

2. TALK FLOW
• INTRODUCTION
• OVERVIEW OF PORTABLE DISPLAYS
• WHAT IS IMOD?
• HOW IT WORKS?
• COLOR GENERATION
• HYSTERISIS LOOP
• ADVANTAGES
• APPLICATIONS

3. INTRODUCTION
• Wireless communication is an essential and
continuously expanding part of modern life.
• Smart phones presents a number of
challenging requirements on the display
module, such as low power consumption,
video quality speed, and viewability in a
broad range of lighting conditions.
• The QUALCOMM Interferometric Modulator
display (IMOD) is an electrostatically
actuated, bistable micro electromechanical
system (MEMS) device.

4. WHAT IS IMOD?
• Interferometric Modulation(IMOD) is a new display
technology that produces fantastic colours by exploiting
the physical effect of interference of light while using
little of the limited battery power.
• The device uses an array of artificial microstructures
fabricated using micro-electromechanical (MEMS)
technology to produce the same kind of iridescent
colours as seen on the wings of tropical butterflies.

5. IMOD:BIOMIMICRY

6. TECHNOLOGY USED

7. • Black is perceived when a small optical path
length is produced, which moves the resonant
wavelength into the UV part of the spectrum.
• MEMS functionality of the IMOD element
comes into play for switching between a
bright color state and a black state.
• This switching is extremely fast, on the order
of tens of μs rendering the IMOD display
video-rate capability.
• RGB pixels have IMOD elements with different
air gaps designed to reflect in the red, green,
and blue wavelength, respectively.

9. Color Generation:

10. Grayscale Generation
• The IMOD element is a 1 bit device, that is, it
can be driven to either a dark (black) or bright
(color) state.

11. HYSTERISIS LOOP

12. ADVANTAGES:
• Speed
• Ease of Manufacture
• Robustness
• Industry Compatibility
• Readability
• Less power consumption
• Consistent contrast quality

16. APPLICATIONS:
• Cell phone secondary & main displays
• MP3 players
• Portable Bluetooth accessories
• Handheld/wrist-worn GPS devices
• Industrial applications

17. Technology throughout the handset
value chain:

18. CONCLUSION
• IMODs are powerful photonic devices that
can be used as excellent displays for
manipulation of light not only in cell phones
but also in camcorders, electronics books,
computer monitors, wall mounted TVs, etc.
• All in all, in the coming days, IMOD displays
are likely to replace other devices.

19. REFERENCES
• Electronics for you(Nov-2008)
• M.W. Miles, “Toward an iMoD ecosystem”
• J. B. Sampsell, "Causes of Color: Especially Interference
Color"
• J.B. Sampsell, “MEMS-based display technology drives
next-generation FPDs for mobile applications”
• M. Mitchell Waldrop (November 2007). "Brilliant Displays"
• http://www.smalltimes.com/news/display_news_story.cfm
• http://en.wikipedia.org/wiki/Interferometric_modulator_di
splay
• http://www.qualcomm.com/common/documents/white_p
apers/QMT_Technology_Overview_12-07.pdf