Abstract
We report generation of pure-white color by mixing red, green, blue (RGB) lights from LEDs through a novel 3??3 fiber optics color synthesizer (FOCS), which is made of hard plastic cladding fiber (HPCF). The three output ports provided an equal power for the synthesized white color with almost identical CIE color coordinates. The FOCS rendered tunable white color temperature and optical properties of the outputs were experimentally investigated in terms of uniformity in power, photometric luminance, and color coordinate. We further packaged the device and applied to small form factor back light unit (BLU) to show feasibility in illumination uniformity enhancement.
Highlights
High purity white color is being widely used in various areas of optical applications such as illumination [1], interferometry [2, 3], and displays [4,5]
The color gamut would be determined by the emission spectrum of the light source as well as the transmission spectra of the color filters in a color illumination system such as back light unit (BLU) of liquid crystal displays (LCDs)
The color temperature can be adjustable from rending R,G and B luminance of these illumination systems [4]
Summary
High purity white color is being widely used in various areas of optical applications such as illumination [1], interferometry [2, 3], and displays [4,5]. Fiberized tunable white color source and fiber optic devices in the visible range would contribute to fulfill immediate future needs in optical technologies in various emerging areas. Colorimetric applications were discussed by exploring the tuning ability in the correlated color temperature. This preliminary result of fiber optic application in the visible applications could open a new door of visible fiber optics, which has not been intensively attempted
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