Abstract
A scheme of hybrid light source using lasers and LEDs for projection display is presented; the si-mulation results show that projectors with the proposed scheme can achieve high brightness of over 1000 lm, good uniformity of illumination and chromaticity. It also provides an improved me-thod for light source with longer life, wider color garment and higher adaptability to environment which can replace UHP in traditional projectors.
Highlights
Lasers and LEDs, as two types of new light sources, have been used in projection area for years [1]-[3]
We propose a novel hybrid light source scheme, in which green lights are composed of green lasers and green LEDs, in the way that the brightness of green color is substantially increased by green lasers
Decoherenced green lasers are collimated by focusing lens and focused by field lens to a specified cone angle, which is helpful for good uniformity of illumination and chromaticity
Summary
Lasers and LEDs, as two types of new light sources, have been used in projection area for years [1]-[3]. Especially for green LEDs, prevents it being used in mainstream commercial projectors. In order to overcome the above shortcomings, a new kind of light source composed of lasers, LEDs and phosphor powder, has been proposed and commercialized [8]. In this method, green colors are generated by ways that blue lasers stimulate the phosphor. We propose a novel hybrid light source scheme, in which green lights are composed of green lasers and green LEDs, in the way that the brightness of green color is substantially increased by green lasers. The simulation results show that projectors with the proposed scheme can achieve high brightness of over 1000 lm, good uniformity of illumination and chromaticity
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