Powerelectronics 1486 Lenss

Thin LED lamps for auto interiors

Dec. 6, 2011
Normal0falsefalsefalseEN-USX-NONEX-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; ...

Normal0falsefalsefalseEN-USX-NONEX-NONE

LEDs have been used to light the exterior of cars and trucks for over 30 years, serving as center-mounted stop lights, rear lighting, headlight accents, and even turn signals. Automotive engineers and stylists liked them for their efficiency, small size, and bright light. Now LEDs are being used more and more for interior automotive lighting as well. And lighting engineers are developing new ways to use LEDs in passenger compartments. At Federal –Mogul Corp., Southfield, Mich., for example engineers have developed NovaLens, a lens for LED lamps that takes up less space, reduces power consumption, and provides more uniform lighting.

Lamps that use the new lens can be made 12-mm thick, which saves 18 mm compared to typical LED lamp profiles. The thinner lamp, when mounted on headliner, gives passengers more headroom. This dovetails nicely with the stylizing trend towards higher seating positions and lower rooflines. The lens also improves passenger safety as increased headroom is a safety factor in rollovers.

The NovaLens is studded with geometric features on the inside and outside that reflect and refract light from LEDs positioned at opposite sides of the lamp, and create a uniform field of illumination. The outside , for example, features several parallel optical flutes that direct light to targeted zones.

In general, LEDs draw less than 2W, depending on customer requirements, compared to 10W for equivalent incandescent bulbs. This lower electrical demand cuts CO2 emissions and helps reduce battery drain, which is important in electric vehicles and hybrids. LEDs also last more than ten times as long as incandescent bulbs and operate 95 degrees C cooler, improving thermal management, installation and styling options.

Sponsored Recommendations

Design AI / ML Applications the Easy Way

March 29, 2024
The AI engineering team provides an overview and project examples of the complete reference solutions based on RA MCUs that are designed for easy integration of AI/ML technology...

Ultra-low Power 48 MHz MCU with Renesas RISC-V CPU Core

March 29, 2024
The industrys first general purpose 32-bit RISC-V MCUs are built with an internally developed CPU core and let embedded system designers develop a wide range of power-conscious...

Asset Management Recognition Demo AI / ML Kit

March 29, 2024
See how to use the scalable Renesas AI Kits to evaluate and test the application examples and develop your own solutions using Reality AI Tools or other available ecosystem and...

RISC-V Unleashes Your Imagination

March 29, 2024
Learn how the R9A02G021 general-purpose MCU with a RISC-V CPU core is designed to address a broad spectrum of energy-efficient, mixed-signal applications.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!