logging in or signing up IMOD rajaniter07 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1450 Category: Education License: All Rights Reserved Like it (3) Dislike it (0) Added: March 21, 2009 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: freshpboy (16 month(s) ago) Thankz for the presentation.... Saving..... Post Reply Close Saving..... Edit Comment Close By: kiranjoshy123 (31 month(s) ago) please sent me the report of seminar topic imod at kiranjoshy123@gmail.com..it will be very valuable for me Saving..... Post Reply Close By: anjalikeerthi (17 month(s) ago) hey plzzzzzzzzzzzzzzzzzzzzzzzzzzz snd me this imod ppt if u got it i m in great need of it soooooooooooooooooooon.its vry urgnt 2 my mail-anjali.keerthi94@gmail.com Saving..... Edit Comment Close By: krishnarajan (34 month(s) ago) If anyone has taken seminar on imod display pls send me the report to my id . my id is krishnachanduvarath@gmail.com Saving..... Post Reply Close Saving..... Edit Comment Close By: krishnarajan (34 month(s) ago) plz send the ppt of imod. my id is "krishnachanduvarath@gmail.com" Saving..... Post Reply Close Saving..... Edit Comment Close By: priya_maurya13 (37 month(s) ago) Plz mail me the presentation slids in ppt format to my id i.e. akkunikee@yahoo.co.in i am also doing seminar on same topic . Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript INTERFEROMETRIC MODULATOR DISPLAY (IMOD) : INTERFEROMETRIC MODULATOR DISPLAY (IMOD) SUBMITTED BY: RAJAN KUMAR 0501212311 ENTC- A 8th SEM TALK FLOW : TALK FLOW INTRODUCTION OVERVIEW OF PORTABLE DISPLAYS WHAT IS IMOD? HOW IT WORKS? COLOR GENERATION HYSTERISIS LOOP ADVANTAGES APPLICATIONS INTRODUCTION : INTRODUCTION Wireless communications are 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. OVERVIEW OF PORTABLE DISPLAYS : OVERVIEW OF PORTABLE DISPLAYS Emissive/Transmissive Displays Reflective Displays (Continuous refresh type) Reflective Displays (Bistable type) Transflective Displays Emissive/Transmissive Displays: : Emissive/Transmissive Displays: The liquid-crystal material resides between two transmissive substrates. Backlight is placed underneath one of the substrates and by applying a voltage to the liquid-crystal material the light reaching the observer can be modulated so as to make the display pixel appear bright or dark. Example: LCD, OLED Reflective Displays (Continuous refresh type): : Reflective Displays (Continuous refresh type): Reflective displays usually employ liquid-crystal material on top of the reflective substrate so as to modulate the ambient light reflecting off the reflective substrate. Since there is no backlight in reflective displays, they consume substantially less power than emissive displays. The majority of these types of displays must constantly be refreshed or the displayed image will be lost. Reflective Displays (Bistable type): : Reflective Displays (Bistable type): A bistable display is capable of maintaining one of two states (on or off) without any external influence such as an electric field. Example: EPD and mirasol displays EPDs typically consist of charged microcapsules containing dye suspended between two substrates. In a mirasol display, a flexible thin-film mirror is fabricated on a transparent substrate. Transflective Displays : Transflective Displays Transflective displays employ a partially transmissive mirror as the secondary substrate, as well as a traditional backlight. In low light situations, the device operates as a transmissive display, employing the backlight. In high ambient light conditions, the backlight turns off and the display functions as a reflective display. WHAT IS IMOD? : WHAT IS IMOD? Interferometric Modulation(IMOD) is a new display technology that produces fantastic colours by exploiting the physcal 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. Principle of Operation : Principle of Operation : 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. Color Generation: : Color Generation: Grayscale Generation : 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. HYSTERISIS LOOP : HYSTERISIS LOOP ADVANTAGES: : ADVANTAGES: Speed Ease of Manufacture Robustness Industry Compatibility Readability Less power consumption Consistent contrast quality : APPLICATIONS: : APPLICATIONS: Cell phone secondary & main displays MP3 players Portable Bluetooth accessories Handheld/wrist-worn GPS devices Industrial applications Technology throughout the handsetvalue chain: : Technology throughout the handsetvalue chain: CONCLUSION : 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. REFERENCES : 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_display http://www.qualcomm.com/common/documents/white_papers/QMT_Technology_Overview_12-07.pdf Slide 26: THANK U You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
IMOD rajaniter07 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1450 Category: Education License: All Rights Reserved Like it (3) Dislike it (0) Added: March 21, 2009 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: freshpboy (16 month(s) ago) Thankz for the presentation.... Saving..... Post Reply Close Saving..... Edit Comment Close By: kiranjoshy123 (31 month(s) ago) please sent me the report of seminar topic imod at kiranjoshy123@gmail.com..it will be very valuable for me Saving..... Post Reply Close By: anjalikeerthi (17 month(s) ago) hey plzzzzzzzzzzzzzzzzzzzzzzzzzzz snd me this imod ppt if u got it i m in great need of it soooooooooooooooooooon.its vry urgnt 2 my mail-anjali.keerthi94@gmail.com Saving..... Edit Comment Close By: krishnarajan (34 month(s) ago) If anyone has taken seminar on imod display pls send me the report to my id . my id is krishnachanduvarath@gmail.com Saving..... Post Reply Close Saving..... Edit Comment Close By: krishnarajan (34 month(s) ago) plz send the ppt of imod. my id is "krishnachanduvarath@gmail.com" Saving..... Post Reply Close Saving..... Edit Comment Close By: priya_maurya13 (37 month(s) ago) Plz mail me the presentation slids in ppt format to my id i.e. akkunikee@yahoo.co.in i am also doing seminar on same topic . Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript INTERFEROMETRIC MODULATOR DISPLAY (IMOD) : INTERFEROMETRIC MODULATOR DISPLAY (IMOD) SUBMITTED BY: RAJAN KUMAR 0501212311 ENTC- A 8th SEM TALK FLOW : TALK FLOW INTRODUCTION OVERVIEW OF PORTABLE DISPLAYS WHAT IS IMOD? HOW IT WORKS? COLOR GENERATION HYSTERISIS LOOP ADVANTAGES APPLICATIONS INTRODUCTION : INTRODUCTION Wireless communications are 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. OVERVIEW OF PORTABLE DISPLAYS : OVERVIEW OF PORTABLE DISPLAYS Emissive/Transmissive Displays Reflective Displays (Continuous refresh type) Reflective Displays (Bistable type) Transflective Displays Emissive/Transmissive Displays: : Emissive/Transmissive Displays: The liquid-crystal material resides between two transmissive substrates. Backlight is placed underneath one of the substrates and by applying a voltage to the liquid-crystal material the light reaching the observer can be modulated so as to make the display pixel appear bright or dark. Example: LCD, OLED Reflective Displays (Continuous refresh type): : Reflective Displays (Continuous refresh type): Reflective displays usually employ liquid-crystal material on top of the reflective substrate so as to modulate the ambient light reflecting off the reflective substrate. Since there is no backlight in reflective displays, they consume substantially less power than emissive displays. The majority of these types of displays must constantly be refreshed or the displayed image will be lost. Reflective Displays (Bistable type): : Reflective Displays (Bistable type): A bistable display is capable of maintaining one of two states (on or off) without any external influence such as an electric field. Example: EPD and mirasol displays EPDs typically consist of charged microcapsules containing dye suspended between two substrates. In a mirasol display, a flexible thin-film mirror is fabricated on a transparent substrate. Transflective Displays : Transflective Displays Transflective displays employ a partially transmissive mirror as the secondary substrate, as well as a traditional backlight. In low light situations, the device operates as a transmissive display, employing the backlight. In high ambient light conditions, the backlight turns off and the display functions as a reflective display. WHAT IS IMOD? : WHAT IS IMOD? Interferometric Modulation(IMOD) is a new display technology that produces fantastic colours by exploiting the physcal 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. Principle of Operation : Principle of Operation : 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. Color Generation: : Color Generation: Grayscale Generation : 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. HYSTERISIS LOOP : HYSTERISIS LOOP ADVANTAGES: : ADVANTAGES: Speed Ease of Manufacture Robustness Industry Compatibility Readability Less power consumption Consistent contrast quality : APPLICATIONS: : APPLICATIONS: Cell phone secondary & main displays MP3 players Portable Bluetooth accessories Handheld/wrist-worn GPS devices Industrial applications Technology throughout the handsetvalue chain: : Technology throughout the handsetvalue chain: CONCLUSION : 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. REFERENCES : 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_display http://www.qualcomm.com/common/documents/white_papers/QMT_Technology_Overview_12-07.pdf Slide 26: THANK U