Light ray separation apparatus

Abstract

The invention provides a light ray segregating unit, which comprises a light source, an output component, a first light filter, a first light circulator, a second light filter, and a second light circulator. The light source comprises a first colorful light, a second colorful light and the primary color light of a third colorful light. The first light filter leads the first colorful light to be filtrated out from the primary color light and produces a first filtrating light. The first light circulator receives the primary color light by the light source and leads the primary color light to be output to the first light filter. The first light circulator leads the first colorful light to be guided to an output component. The second light filter leads the second colorful light to be filtrated out from the first filtrating light and produces a second filtrating light. The second circulator receives the first filtrating light by the first light filter and leads the first filtrating light to be output to the second light filter. The second light circulator leads the second colorful light to be guided to the output component.

Description

Technical field [0001] The present invention relates to an optical device, especially an optical device for separating light. Background technique [0002] Current projectors can be roughly divided into two categories: digital light processing (DLP) projectors and liquid crystal on silicon (LCOS) projectors. Both types of projectors have the advantages of simple optical path design, high brightness, high contrast, etc., so they are widely used in commercial projectors, home projectors, and large rear-projection TVs. [0003] Both DLP projectors and LCOS projectors need to use a color wheel to separate light of different colors. Generally speaking, the color wheel is composed of four different color filters of red, green, blue, and white, and it rotates continuously at a high speed. After being filtered by the color wheel, the red light, green light, blue light, and white light included in the white light source will pass through the color wheel in order, and then be projected to ...

AI Technical Summary

Problems solved by technology

[0004] As is known to those skilled in the art, the color wheel assembly must include a motor to provide the rotational power and therefore consumes relatively high power

In addition, the color wheel that continues to rotate at high speed in a high temperature environment has the disadvantage of a relatively high wear rate

On the other hand, the above-mentioned projection mechanisms all transmit light in the air, and it is difficult to avoid the problem of light leakage or scattering

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