2results about "Hollow light guides" patented technology

A light pipe assembly is provided which complies with the International Electrotechnical Commission (IEC) IP ratings for dirt and water ingress while reducing the amount of hardware typically required to mount each light pipe. The light pipe assembly includes a light pipe and an adapter. Each adapter includes a vertically extending center channel which receives and connects a light pipe's first end to an LED mounted upon a printed circuit board (PCB). Each light pipe is intended to project through the hole of an electronic device's panel. Furthermore, each light pipe's second end has flange and a press-fit region, preferably in the form of circumferential ribs, which forms a press-fit engagement with a panel.

A backlight for an image forming device includes spaced apart front and rear optical reflectors defining an optical cavity therebetween, at least one light source for emitting light into the optical cavity, and a thermal management layer. The front optical reflector is disposed between the image forming device and the rear optical reflector, substantially transmits light in a first wavelength range toward the image forming device, and substantially reflects light in a second wavelength range toward the rear optical reflector. The rear optical reflector substantially reflects light in the first wavelength range toward the front optical reflector, and substantially transmits light in the second wavelength range. The thermal management layer absorbs at least a portion of light in a third wavelength range. The light in the third wavelength range is emitted by an electronic circuit disposed adjacent to the backlight.