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Optimizing Side Turn Signals for Large Trucks: LED Performance and Design Strategies

This presentation by Sandeep Saxena delves into the development of effective side turn signals for large trucks, emphasizing optical and engineering advancements. Key discussions include SAE specifications, the use of a 38 x 1/0.5 x 1.25 inch symmetrical lid with a flat lens, and the implications of zonal values and wide-angle testing. It explores crucial design techniques, including reflector layouts, tooling considerations, and the incorporation of LED technology from Nichia, achieving 20 lumens per LED while evaluating design strategies across varying geometries.

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Optimizing Side Turn Signals for Large Trucks: LED Performance and Design Strategies

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Presentation Transcript

  1. USER CONFERENCE 2014 APRIL 28, 2014

  2. SIDE TURN SIGNALS FOR LARGE TRUCKS Sandeep Saxena Optical & Advanced Engineering

  3. SAE SPECIFICATION

  4. INTERPOLATING LID

  5. RECREATING SYMMETRICAL LID 38 X 1/0.5 X 1.25 = 95 LUM

  6. FLAT LENS EFFECT

  7. PS Applications

  8. RISK AREAS • ZONAL VALUES OK • WIDE ANGLE TEST POINTS • SIDEMARKER FUNCTION??

  9. MACRO FOCAL APPROACH • KEY POINTS • LAYOUT OF REFLECTORS • TOOLING CONSIDERATIONS • SURPRISE ELEMENTS

  10. DESIGN STRATEGY 1 3 2 4 5 6

  11. 3 1 5 6 2 4 18 Lumens per LED considered after ALL losses LED: NICHIA

  12. SIDE TURN INDICATOR

  13. SIDEMARKER AT 1/7th INTENSITY

  14. SIMULATION VS ACTUAL PERFORMANCE

  15. ECE CATEGORY 6 DIRECTION INDICATOR

  16. GEOMETRY 60 DEGREE 0 DEGREE

  17. DESIGN STRATEGY B A C

  18. LIGHT COLLECTION FROM AREA “A”

  19. LIGHT COLLECTION FROM “B & C” AREAS

  20. OPTICAL SURFACES INTEGRATED IN CAD MODEL

  21. 20lum/LED with Optic free lens

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