M.E Academic Industrial Case Study Presentation

1. Industrial Case Study By ~ Girishbabu D Uppin PGPDE ~ 05203 “ Non Uniform Distribution of Light through light guide/pipe”

2. Location of the light guide in present case Top cover LCD LCD Backlighting (Light guide) LED Rear AC Control panel

9. Study of existing light guides/pipes: Light distribution

10. Present designs of light guide for one LED with secondary operation painting background Present designs of light guide for two LED with secondary operation painting back ground Present designs of light guide for one LED without painting but introducing segregations below

11. Light Distribution through various present light guides With two LEDs with varying thickness and with painting Painting

12. Light Distribution through various present light guides With two LEDs with concave profile & painting With two LEDs with Flat profile and painting

13. Light Distribution through various present light guides With one LED with Flat profile and painting With one LED with Tapering profile and painting

14. Light Distribution through various present light guides With one LED with Tapering profile and painting

15. Light Distribution through various present light guides With one LED with segregations With one LED with segregations and painting at the edge Painting

16. Light Distribution through various present light guides With one LED with segregations and painting at circumference With one LED with segregations With one LED with segregations

18. ARRAYS Taper surface Angle for refraction Explanation New Design:

19. Distribution of light (satisfactory compare to previous designs) 2 LEDs

21. New Design with improvement Angle for refraction Conical to reflect back the outgoing light New shape tilt angle is optimized to produce the most uniform illumination distribution Arrays This design has to be tested

22. Thank You uppingiri@yahoo.com, uppingiri@gmail.com