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Projection system

A projection system and projector technology, applied in the field of projection systems, can solve the problems of complex structure and high cost of the projection system, and achieve the effects of convenient manufacture, simple structure and low requirements for optical components

Inactive Publication Date: 2009-11-11
PHOEBUS VISION OPTO ELECTRONICS TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of complex structure and high cost of the existing projection system, thereby providing a projection system with simple structure, easy production and low cost

Method used

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] exist figure 2 In, a specific embodiment of the present invention is described in detail. In this embodiment, the projection system of the present invention includes: a green laser light source 211, a blue laser light source 221, a red laser light source 231, a first digital microreflector (DMD) 212, a second DMD 222, and a third DMD 232 , the first dichroic mirror 213, the second dichroic mirror 223, the first focusing lens 214, the first relay lens 216, the second focusing lens 224, the second relay lens 226, the third focusing lens 234, the first Three relay lenses 236 , a first integrating rod 215 , a second integrating rod 225 , a third integrating rod 235 and a projection lens 217 . The green laser light source 211, the first focusing lens 214, the first integrating rod 215, the first relay lens 216 and the first digital microre...

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Abstract

The invention provides a projection system, which comprises a first light path consisting of a first light source, a first beam homogenization unit and a first digital micro-reflector in turn, a second light path consisting of a second light source, a second beam homogenization unit and a second digital micro-reflector in turn, and a third light path consisting of a third light source, a third beam homogenization unit and a third digital micro-reflector in turn, wherein the first light path passes through a first dichroic mirror and a second dichroic mirror to reach a projection lens from a beam received by the first light source; the second light path is reflected by the first dichroic mirror from a beam received by the second light source and then passes through the second dichroic mirror to reach the projection lens; and the third light path is reflected by the second dichroic mirror from a beam received by the third light source to reach the projection lens. The projection system has the advantages of simple structure, low requirement on optical elements and convenient manufacturing, and effectively reduces the production cost.

Description

technical field [0001] The present invention relates to a projection device, in particular to a projection system in the projection device. Background technique [0002] The projection system of the existing three-chip digital projector (DLP) is mainly composed of a color separation recombination prism and a total internal reflection prism. Due to the large volume of the color separation and recombination prism and the complicated manufacturing process, the projection system is bulky and unfavorable for production. In addition, there are projection systems with other structures. For example, US Patent Publication No. US2005 / 0018142 discloses a projection system with a total internal reflection prism and an X-cube dichroic prism. figure 1 The displayed projection system includes red, green, and blue light sources 101, 102, and 103, total internal reflection prisms 104, 105, and 106, three DMDs 107, 108, and 109, projection lenses 110, 111, 112, and 113, and X-cube color comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/18G02B27/09G03B21/14H04N9/31
Inventor 郑光房涛毕勇王延伟闵海涛
Owner PHOEBUS VISION OPTO ELECTRONICS TECH
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