Light guide films typically have a thickness of 0.05” or more, and are made from polymers such as acrylic or polycarbonate. Side view LED’s are attached to the edge of the film. Cutouts can be made in the film to place side view LEDs at the appropriate location. Several technologies exist to extract the light through optical features including laser microdots, half-tone printed inks, and mechanically pressed shapes.
The light rays from the side view LED travel through the film and are refracted upwards towards the surface of the overlay once it hits these optical features, producing an illumination effect. Uniformity of this effect can be controlled through patterns and materials. A back reflector is utilized to further capture any light that is transmitted downward from the light emitting surface. Opaque materials can be utilized to block light in undesired areas.
Our patented Clad Flat Fiber™ (CFF) technology utilizes a tri-extruded film in thicknesses of 0.2mm, 0.3mm or 0.45mm. The core material is acrylic or polycarbonate, and the tri-layer construction adds significant value. The cladding layers provide total internal reflection through the core until we modify it per your needs. The CFF technology allows for a printed back reflector to lower total thickness and improve ease of assembly.
Lumitex can additionally integrate printed circuits onto CFF to eliminate the need for a separate electronics. We engineer a project specific optical design to optimize both light intensity and appearance. As part of the Lumitex Value Added System (L-VAS) we can specify the LED locations, design the electronics, and provide a complete light guide assembly including diffusion layers and brightness enhancing films.
Our Light Guide Film Technology is well suited for the following applications:
Developed through proprietary optical processing and controlled through selective etch patterns and materials.
Ability to have discreet lighting where it is required including light dams to prevent color bleed.
Our light guide film provides the flexibility to backlight complex shapes and sizes.
Through color, sizing, layering and quick cost-effective prototypes.
Reflectors, electronics and other components provide flexibility and expertise where needed.
Highly efficient optical design to minimize power required while optimizing brightness.
Multiple LED Side Emitting standard sources including medical and aerospace grade in all colors, including RGBW.
3M Adhesives, High Reflective Inks, Flame Retardant Construction.
Optimum LED layout uses a minimum transition of 6mm to properly spread the light. Shorter transition lengths can be accommodated through optical pattern designs and led spacing.
Light Guide only: Customer supplies their own light source and electronics.
Light Guide and Source Customer only needs to supply power.
Light Guide, Source, Electronics Lumitex provides full integration into customer's design including diffusion layers, brightness enhancing films, electronic components, PCB/FPC's, cabling, and packaging.
When our customer decided to modernize one of their passenger control units to enhance traveler experience and provide a more sophisticated look to their airplanes, they approached Lumitex for lighting solution. Our engineering team was able to provide a combination of benefits that no other backlighting technology could match.
With eight layers between the slim aluminum bezel base and overlay, we needed a compact, bright, uniform light that wouldn't sacrifice the tactile response of the switch. The design flexibility and thinness of Lumitex's Clad Flat Fiber™ allowed us to seamlessly create a custom solution. At only 0.2mm thick, we extracted light only where it was needed to maximize light output with minimal disruption to the dome switch layer. The superior performance of this user-friendly light guide resulted in our engineers being tasked to produce custom lighting solutions for a variety of their passenger control units.
Key Reasons our Clad Flat Fiber™ was selected
When developing the latest and most advanced model in its family, their design team presented Lumitex with an opportunity to backlight the membrane switch keypad. With its unique circuitry and limited real estate under the rubber keypad, Lumitex Clad Flat Fiber™ technology offered a great fit. Our engineers were able to easily develop a custom solution conforming to the complex geometry.
The intense light of the Lumitex .3mm Clad Flat Fiber™ material was strong enough to provide superior illumination and its thin profile offered exceptional tactile response and effortless integration. Because of this, Lumitex was awarded the business.
Key Reasons our Clad Flat Fiber™ was selected
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