Illumination Optics for Beam Projectors

Abstract

An illumination optical system for a beam projector, including: a light source (101); a color conversion unit (103) having at least one fluorescent substance layer (135) that reflects a light from the light source (101) or converts the light emitted from the light source (101) to a wavelength-converted light; and a dichroic mirror (102) that causes the light emitted from the light source (101) to be incident on the color conversion unit (103). Lights reflected or emitted by the color conversion unit (103) and having different wavelengths are incident on a display panel (109) through the same path. In the illumination optical system, a light emitted from one light source (101) can be processed to produce red, green and blue lights which can be in turn incident on the display panel (109)through the same optical path of the light reflected or emitted by the color conversion unit (103).

Description

Technical field [0001] The present invention generally relates to an optical device, and more specifically, to an optical system for a beam projector that magnifies an image output from a display panel and projects the magnified image to a screen on. Background technique [0002] A beam projector is an optical instrument that uses an optical system and a display panel to achieve magnified images. The size of the image can be adjusted according to the distance between the beam projector and the screen. If a sufficient distance between the beam projector and the screen can be ensured, it is easy to realize a large image with high definition, regardless of the size of the display device. [0003] The optical system in the beam projector structure can be divided into an illumination optical system and a transmission optical system. The illumination optical system means an optical system formed by optical elements arranged on an optical path from a light source to a display panel, an...

AI Technical Summary

Problems solved by technology

However, as described above, although the illumination optical system is improved in terms of color reproduction by using a plurality of light emitting diodes and / or laser diodes, the light travels along different paths in the illumination optical system depending on the color of light to be incident on the display panel. path travel, which requires multiple optical components such as lenses and mirrors

When arranging multiple light sources and the lenses and mirrors on different optical paths is implemented in a portable terminal, it is difficult to achieve miniaturization

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