Device for converting unpolarized incident light into polarized emitting light

Abstract

A converting device converts an unpolarized incident light into a polarized emitting light. The converting device includes a polarizing or polarization beam splitter, a converting module, and a retroreflector. The polarizing or polarization beam splitter splits the unpolarized incident light into a first polarization wave and a second polarization wave, the polarizing or polarization beam splitter reflecting the first polarization wave and allowing the second polarization passing through thereon. The converting module receives the second polarization wave and converting the polarization direction of the second polarization wave to match or approximate a polarization direction of the first polarization wave, and guiding the converted second polarization wave to an output direction. The retroreflector is coupled to the polarizing or polarization beam splitter and reflects the first polarization wave to the output direction. Finally, the reflected first polarization wave and the converted second are combined into the polarized emitting light.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention is about a converting device. More particularly, the present invention is about a converting device for converting unpolarized incident light into polarized emitting light.[0003]2. Description of the Prior Art[0004]Nowadays LCD monitor architectures include backlight modules, lower polarizing plate, LCD module, color filter, and upper polarizing plate. And the function of the lower polarizing plate is to convert the unpolarized light to linear polarization light and provide the linear polarization light to the LCD module.[0005]To provide linear polarization light source, conventional technic uses the polarization plate to convert the unpolarized light to the polarization light. The polarization plate is coated with a polarization layer to allow the desired polarization wave portion passing through, and absorb the undesired polarization light.[0006]By the conventional technic, the energy of the unde...

AI Technical Summary

Benefits of technology

The converting device described in this patent is able to efficiently convert unwanted light waves into desired ones, resulting in improved energy use compared to conventional polarization devices. This leads to the formation of emitting polarized light.

Problems solved by technology

By the conventional technic, the energy of the undesired polarization light losses on the coating layer thence reducing energy usage efficiency of input light.

Thus, providing a device which is able to configure the energy of converting light effectively is a technical issue needed to be solved in the technical field.

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