Multi-color laser light source light combining device and method for LCOS and liquid crystal display equipment

Abstract

The invention belongs to the field of optics, and discloses a multi-color laser light source light combining device and method for an LCOS and liquid crystal display equipment. The multi-color laser light source device comprises more than two lasers and more than two optical components, and the more than two lasers are used for generating lasers of two or more different colors; the more than two optical components are located in a light emitting direction of laser generated by the lasers, one half of each optical component is a polarizer, and the other half of each optical component is a half-wave plate; when the polarization directions of the lasers emitted by the more than two lasers are different, the polarization sheets of the more than one optical component are located on the emergentlight path of the lasers for generating the lasers and used for fixing the polarization directions of the lasers, and the half-wave plates of the more than one optical component are located on the emergent light path of the lasers for generating the lasers and used for changing the polarization directions of the lasers. According to the invention, the polarization state of the laser is consistentthrough the polarizer or the half-wave plate, and the optical loss is only the loss of the half-wave plate, so that the optical efficiency of the system is higher.

Description

technical field [0001] The invention relates to the field of optics, in particular to a multi-color laser light source light combination device method for LCOS and a liquid crystal display device. Background technique [0002] LCOS is an active dot matrix reflective liquid crystal display technology. The display principle of LCOS is: the incident S-polarized light is reflected by PBS and then irradiates on the LCOS display chip. When the applied voltage of a certain pixel of the liquid crystal layer is 0, the input S-polarized light passes through the liquid crystal layer, and the polarization direction does not deflect, reaching The bottom is reflected back to output S-polarized light. After being reflected by the PBS prism, the S-polarized light returns to the original path and cannot enter the transmitted light path. The light output is zero, and this pixel is in a "dark state". When the external voltage is applied to the pixel, the input S-polarized light passes through...

AI Technical Summary

Problems solved by technology

The PS conversion plate is generally composed of multiple pieces of coated glass and half-wave plates. After the laser passes through multiple pieces of coated glass and half-wave plates, there will be loss, resulting in low efficiency.

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