1 / 20

Prepared by: Steven Swenson Dept. of Electrical and Computer Engineering Utah State University

ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic: Micromirror Actuator. Prepared by: Steven Swenson Dept. of Electrical and Computer Engineering Utah State University stev.swen@aggiemail.usu.edu 435-227-5498. 3/9/2012. Outline. Reference List

ksena
Download Presentation

Prepared by: Steven Swenson Dept. of Electrical and Computer Engineering Utah State University

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators Topic: Micromirror Actuator Prepared by: Steven Swenson Dept. of Electrical and Computer Engineering Utah State University stev.swen@aggiemail.usu.edu 435-227-5498 3/9/2012

  2. Outline • Reference List • To Explore Further • Major Applications • Basic Working Principle • Sample Application • Major Specifications • Limitations • Additional Information ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  3. Reference List • http://webdocs.cs.ualberta.ca/~database/MEMS/sma_mems/mirror.html • http://www.dlp.com/default.aspx • http://www.dlp.com/projector/ • http://www.dlp.com/projector/dlp-advantages/default.aspx • http://www.dlp.com/projector/dlp-innovations/default.aspx • http://www.bostonmicromachines.com/telescope-mirror.htm • http://www.bostonmicromachines.com/beam-shaping.htm • http://www.bostonmicromachines.com/retinal-imaging.htm • http://www.bostonmicromachines.com/confocal-microscopy.htm • http://en.wikipedia.org/wiki/Digital_micromirror_device • http://en.wikipedia.org/wiki/Digital_Light_Processing ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  4. Reference List, Cont. • http://dlp.com/ • http://www.tech-faq.com/how-lcd-projectors-work.html • http://www.projector.com/resources/dlpprojectortechnology.php • http://encyclopedia2.thefreedictionary.com/DLP+projector • http://www.projector.com/resources/dlpprojectorvslcdprojector.php • http://www.pctechguide.com/projectors/dlp-projectors • http://electronics.howstuffworks.com/dlp.htm ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  5. To explore further (survival pointers of web references etc) • When searching online for Micromirror arrays, the industry knows them as Digital Micromirror Devices, or DMD’s • Projectors that use this technology are known as Digital Light Projectors, or DLP’s ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  6. Major Applications • Micromirrors are more commonly known as DMD’s (Digital Micromirror Device) • Most commonly found in projectors and other projecting devices • Lasers • Telescopes • Microscopes • Fiber Optics • Retinal Scans ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  7. Major Applications, Cont. • Basically anything that requires minute adjustments of light for focusing, clarity, or analysis ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  8. Basic Working Principle • Exactly what it sounds like: • A microscopic mirror that corresponds to one pixel • Uses MEMs technology (Micro Electro-Mechanical) systems to move the mirror ±10-12 degrees • Mirror is held in place by compliant torsion hinges • Two electrodes rest on either side of the hinges http://upload.wikimedia.org/wikipedia/commons/thumb/9/9c/Abe.jpg/220px-Abe.jpg http://upload.wikimedia.org/wikipedia/commons/thumb/c/c7/Digital_micromirror2.svg/220px-Digital_micromirror2.svg.png ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  9. Basic Working Principle, Cont. • Bias charges are put on the electrodes which create attractive and repulsive fields • The desired position of each mirror is held in an SRAM cell • When full, the SRAM cell’s charges are applied to the electrodes • The mirrors are held in this position until the next cycle http://encyclopedia2.thefreedictionary.com/DLP+projector ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  10. Sample Application • Since the most well-known use is in Multimedia Projector technology, this is the example that will be used ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  11. Sample Application, Cont. • Projectors utilize the ability of micromirrors to move a very narrow beam of light very small angles ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  12. Sample Application, Cont. • Color is achieved by two different methods: • Rainbow Wheel • Prism Method ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  13. Sample Application, Cont. • Rainbow Wheel (Single Array) • Utilizes one Digital Light Processing (DLP) chip • A spinning color wheel, Red Green Blue (RGB) LEDs, or Lasers provide colors • These colors take turns projecting on the display • The DLP chip reflects them in proper amounts to create color ranges http://www.projector.com/resources/dlpprojectortechnology.php ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  14. Sample Application, Cont. • Prism Method (Multiple Arrays) • Utilizes multiple DMD chips • Usually three, for each primary color http://www.pctechguide.com/projectors/dlp-projectors ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  15. Sample Application, Cont. • A single light source or three colored light sources provide illumination • For a single light source, the light is broken into colors by a prism • The light is reflected through another prism towards the screen • For multiple light sources, each color is reflected by a DLP chip • These colors are reflected into a central prism • This is what is displayed on the screen ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  16. Sample Application, Cont. • Grayscales are accomplished by rapidly toggling on/off positions • Off position is usually a heat sink of some kind • On position is on screen of projection ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  17. Major Specifications • Resolution of array is what determines clarity of image • Higher resolution means more mirrors • SRAM speed determines refresh rate of mirrors • Color depth (How many bits of resolution per pixel) ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  18. Limitations • While HD resolutions are currently available, the larger the resolution, the more expensive • Fragile, should not be exposed to extreme knocks or shaking ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  19. Additional Information • Buying individual DMD chips is not really easy • TI owns patent, and want you to buy product with chip in it, not chip itself • Projectors • HDTV’s • Etc… • DLP projectors are available anywhere you can buy a regular LCD projector, but are more expensive • $700 for low end ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  20. Additional Information, Con. • TV’s are also available • Not as thin as LCD TV’s • Can be less expensive • Thousands of possible applications beyond entertainment • What light stream would you like to modify? ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

More Related