logging in or signing up greating light valv by gaurab swapnasarit 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: 156 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: September 18, 2011 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript SEMINAR BY : GOURAB PANDA : ENTC ‘B’ : 0501212343 : SEMINAR BY : GOURAB PANDA : ENTC ‘B’ : 0501212343 THE GRATING LIGHT VALVE:REVOLUTIONIZING DISPLAY TECHNOLOGYINTRODUCTION: INTRODUCTION Silicon Light Machines was founded in 1994 to develop and commercialize a range of products based on the Grating Light Valve™ (GLV™) technology. The original GLV device concepts were developed at Stanford University.TALK FLOW: TALK FLOW Fundamental concept Building the GLV device Controlling the GLV device Applying the GLV technology Compare the GLVFUNDAMENTAL CONCEPT: FUNDAMENTAL CONCEPT Consist of parallel row of reflecting ribbon Controlled reflection and diffraction of incident light produce dark and bright pixelDARK STATE: DARK STATE Ribbons are in same plane reflecting the incident lightBRIGHT STATE: BRIGHT STATE Movable ribbons are pull down diffraction of incident lightBUILDING THE GLV DEVICE: BUILDING THE GLV DEVICE Using main stream IC technology(e.g. etching, photolithography , masking etc.) Ribbons are built using silicon nitride coated with very thin layer of aluminumPIXEL FORM: PIXEL FORM Set of four ribbon(two fix two movable) form a pixel Ribbon move due to electrostatic forceMANUFACTURE: MANUFACTURE 2-mask IC process Glass lid is fix above the ribbon Electronic driver and control logic is useCONTROLLING THE GLV DEVICE: CONTROLLING THE GLV DEVICE Voltage apply for movement of ribbon V1 is switch up voltage V2 is switch down voltage Vb is bias voltage(V1<Vb<V2) and V2/V1=2Cont…: Cont… Ribbon down require a voltage differential of V2 volts the ribbon down remain down voltage differential fall V1 volts Switching time is approximately 20nsADVANTAGES: ADVANTAGES High speed of operation No need to provide buffer or delay function GLV switching speeds make it easy to implement an 8-bit or greater grey scale High contrast ratio, fill ratio and optical efficiency Ease of Manufacturing High Reliability and StabilityAPPILICATION: APPILICATION Video input is format converted and then input to digital driver Light diffracted by GLV device into eyepiece for virtual display or into an optical system for image projectionCOLOR IMAGE: COLOR IMAGE Using different ribbon to create a red green blue pixel Red area widest pitch, blue area and green area narrower pitchUSING RGB: USING RGB With the appropriate filtered source light, combinations of red, green and blue diffracted light is directed to the projector lens.USING LED: USING LED An even simpler, handheld, color display device uses three LED sources red (642nm), green (532nm), blue (457nm).LARGE SCREEN PROJECTOR: LARGE SCREEN PROJECTOR By passing the source’s white light through dichroic filters, red, blue and green light are incident on three separate GLV devices.HDTV PROJECTOR: HDTV PROJECTOR For an HDTV projector the visible light column is scanned at the video refresh rate to paint a full HDTV image (1088x 1920 elements). An HDTV projector utilizing three GLV device optical attenuator modulesCOMPARING THE GLV: COMPARING THE GLV Compare with micro-mirror light valve technology Compare with conventional LCDREFERENCES: REFERENCES [1] D.T. Amm and Robert W. Corrigan, “Optical Performance of the Grating Light Valve [2] R. W. Corrigan, D.T. Amm, and C.S. Gudeman, “Grating Light Valve. Technology for Projection Displays,” International Display Workshop, Kobe, Japan, December 1998. Resnick Halliday www.siliconlight.comSlide 21: THANK YOUSlide 22: Any Queries??? You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
greating light valv by gaurab swapnasarit 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: 156 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: September 18, 2011 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript SEMINAR BY : GOURAB PANDA : ENTC ‘B’ : 0501212343 : SEMINAR BY : GOURAB PANDA : ENTC ‘B’ : 0501212343 THE GRATING LIGHT VALVE:REVOLUTIONIZING DISPLAY TECHNOLOGYINTRODUCTION: INTRODUCTION Silicon Light Machines was founded in 1994 to develop and commercialize a range of products based on the Grating Light Valve™ (GLV™) technology. The original GLV device concepts were developed at Stanford University.TALK FLOW: TALK FLOW Fundamental concept Building the GLV device Controlling the GLV device Applying the GLV technology Compare the GLVFUNDAMENTAL CONCEPT: FUNDAMENTAL CONCEPT Consist of parallel row of reflecting ribbon Controlled reflection and diffraction of incident light produce dark and bright pixelDARK STATE: DARK STATE Ribbons are in same plane reflecting the incident lightBRIGHT STATE: BRIGHT STATE Movable ribbons are pull down diffraction of incident lightBUILDING THE GLV DEVICE: BUILDING THE GLV DEVICE Using main stream IC technology(e.g. etching, photolithography , masking etc.) Ribbons are built using silicon nitride coated with very thin layer of aluminumPIXEL FORM: PIXEL FORM Set of four ribbon(two fix two movable) form a pixel Ribbon move due to electrostatic forceMANUFACTURE: MANUFACTURE 2-mask IC process Glass lid is fix above the ribbon Electronic driver and control logic is useCONTROLLING THE GLV DEVICE: CONTROLLING THE GLV DEVICE Voltage apply for movement of ribbon V1 is switch up voltage V2 is switch down voltage Vb is bias voltage(V1<Vb<V2) and V2/V1=2Cont…: Cont… Ribbon down require a voltage differential of V2 volts the ribbon down remain down voltage differential fall V1 volts Switching time is approximately 20nsADVANTAGES: ADVANTAGES High speed of operation No need to provide buffer or delay function GLV switching speeds make it easy to implement an 8-bit or greater grey scale High contrast ratio, fill ratio and optical efficiency Ease of Manufacturing High Reliability and StabilityAPPILICATION: APPILICATION Video input is format converted and then input to digital driver Light diffracted by GLV device into eyepiece for virtual display or into an optical system for image projectionCOLOR IMAGE: COLOR IMAGE Using different ribbon to create a red green blue pixel Red area widest pitch, blue area and green area narrower pitchUSING RGB: USING RGB With the appropriate filtered source light, combinations of red, green and blue diffracted light is directed to the projector lens.USING LED: USING LED An even simpler, handheld, color display device uses three LED sources red (642nm), green (532nm), blue (457nm).LARGE SCREEN PROJECTOR: LARGE SCREEN PROJECTOR By passing the source’s white light through dichroic filters, red, blue and green light are incident on three separate GLV devices.HDTV PROJECTOR: HDTV PROJECTOR For an HDTV projector the visible light column is scanned at the video refresh rate to paint a full HDTV image (1088x 1920 elements). An HDTV projector utilizing three GLV device optical attenuator modulesCOMPARING THE GLV: COMPARING THE GLV Compare with micro-mirror light valve technology Compare with conventional LCDREFERENCES: REFERENCES [1] D.T. Amm and Robert W. Corrigan, “Optical Performance of the Grating Light Valve [2] R. W. Corrigan, D.T. Amm, and C.S. Gudeman, “Grating Light Valve. Technology for Projection Displays,” International Display Workshop, Kobe, Japan, December 1998. Resnick Halliday www.siliconlight.comSlide 21: THANK YOUSlide 22: Any Queries???