Light Emitting Diodes (LEDs) are the primary light source used in almost every type of illumination application available today, including automotive, commercial and household lighting, consumer electronic products, medical, machine vision, signal and display applications. FRED is fully capable of modeling every LED characteristic, including spectral, power, and angular emission distinctiveness. Coupled with FRED's capability to make arrays of LEDs by simply specifying the number in each direction and their spacing makes FRED the perfect product to analyze each and everyone one of these systems. See our FRED  customer LED Expert's presentation on measured versus simulated results here. FRED currently comes with over 100 LEDs including almost all Luxeon and Osram models. You can read more about the OSRAM LED ray files used in these LED models here.

Automotive Lighting: The automotive industry is quickly moving towards LEDs in every aspect of car lighting. LEDS are currently being used in head/tail/stop/turn/warning lamps, mirror turn signals, overhead dome lighting, and in dashboard and instrument panel lighting.

Signaling: Today's signal applications are perfect for LED use. LEDs are used in both mobile and stationary traffic warning signs, outdoor informational displays, LED monitors displaying road and directional information and large scale TVs on buildings, and finally traffic and signal lamps. For instance, the large outdoor TVs on the side of building use arrays of RGB LEDs due to their longevity, photopic and spectral response and directional viewing angle emission.

Electronics: LEDs are perfect for the electronics market since they use a fraction of the power used by incandescent lighting. LEDs are currently being used in LCD displays, cell phones, camera-phones, PDAs, scanners, projectors, barcode readers, LCD TVs, and LCD displays to name a few applications. Lightpipes are used in many of these devices, clear plastic carriers of the LED emissions to where the display information is at. This information is usually a mask or simply a color pattern to display if an electronic system is on or off.

Backlights for Displays: Backlights are rectangular or square lightpipes that are used in many display devices, including cell phones, Personal Digital  Assistant (PDAs), watches, DVD LCD monitors, computer notebook display, flat screen LCD monitors, and many more applications with new applications being invented daily.

LED Illumination- Color Image Capability: Each wavelength has an associated weight and color. There are built-in tools for setting wavelength sequences and wavelength weights such as photopic and scotopic spectral responses in FRED.  The program can also synthesize a given color which is perfect for analyzing and designing systems that require colorimetry calculations. Shown in the figures at right are the plots from FRED 's color image visualization on the actual surface. Two systems are shown, one in which green and red LED combine onto a surface and in the second color image of a combination of set of three LEDs combining color on a surface.

FRED model of an RGB LED die emitting into a rectangular curved Light Pipe with a FRED lettered mask at the end

FRED CIE color analysis plot from the simulation of a two LEDs, one Green and one Red onto a surface below the LEDs.

FRED model of three Luxeon LEDs at RGB spectral weighting using the color visualization feature

FRED modeling a single LED immersed in a PMMA sheet with three distinctive scattering sections to create a uniform cell phone display output