Compact reflective liquid crystal projection light engine system

A liquid crystal projection and reflection technology, applied in the field of light engine system, can solve the problems of high light utilization rate of light engine, low volume and cost, and achieve the effect of volume advantage and light energy utilization rate improvement.

Active Publication Date: 2012-08-01
杭州研明光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light engine has a high light utilization rate, but it is not advantageous in terms of volume and cost

Method used

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  • Compact reflective liquid crystal projection light engine system
  • Compact reflective liquid crystal projection light engine system
  • Compact reflective liquid crystal projection light engine system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 The first embodiment of the compact reflective liquid crystal projection system 1 of the present invention is given, including a light source module 2 , a polarized light management module 3 , an image information module 4 and a projection lens 5 .

[0029] The light source module 2 includes a red light LED 21, a green light LED 22, a blue light LED 23, a green light homogenizer 211, a green light homogenizer 221 and a blue light homogenizer 231, and the red light LED 21 is connected to the red light homogenizer 211 , the green LED 22 is connected to the green homogenizer 221 , and the blue LED 23 is connected to the blue homogenizer 231 .

[0030] The natural light of the three primary colors emitted by the red LED 21, the green LED 22 and the blue LED 23 passes through the red light homogenizer 211, the green light homogenizer 221 and the blue light homogenizer 231 respectively, and then collects them into small-angle rectangular light beams required for ligh...

Embodiment 2

[0044] Figure 5 A second embodiment of the compact reflective liquid crystal projection system 1 of the present invention is given. With respect to the first embodiment, in the second embodiment, the positions of the red LED 21 and the red light homogenizing device 211 and the green LED 22 and the green light homogenizing device 221 are reversed, and the blue LED 23 and the blue light homogenizing device 231 are maintained constant. Correspondingly, the green and blue anti-blue filter 322 is used to replace the red and blue anti-blue filter 321, and the blue and green anti-green filter 325 is used to replace the blue and red anti-filter 323. This embodiment can realize the reuse of green light, the green light emitted from the first PBS 31 is in P polarization state, and the red light and blue light are in S polarization state. At this time, the polarization interference filter 33 should select half-wave rotated green light while keeping the polarization state of red light ...

Embodiment 3

[0046] Figure 6 A third embodiment of the present invention is given. Compared with the first embodiment, the difference of this embodiment is that the polarization color combining unit consists of a first PBS 31, a red-transmitting and blue-transmitting filter 321, a green-transmitting blue filter 322, a blue-transmitting red-green The optical filter 324 and the broadband quarter-wave plate 331 are composed.

[0047] The broadband quarter-wave plate 331 and the second broadband quarter-wave plate 332 are respectively glued to the red light incident surface and the green light incident surface of the first PBS 31, and then respectively bonded to the red and anti-blue filter 321 Glue with the green and anti-blue filter 322 , the red and anti-blue filter 321 is located on the red light incident surface of the first PBS 31 , and the green and anti-blue filter 322 is located on the green light incident surface of the first PBS 31 . The blue-transparent anti-red-green filter 324...

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PUM

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Abstract

The invention provides a compact reflective liquid crystal projection light engine system. The light engine system consists of a light source module, a polarized light management module, an image signal module and a projection lens, wherein the light source module consists of a three-primary color solid light source and a uniform light device and provides three-primary color illumination with color saturation for projection; the polarized light management module comprises a polarization beam splitter (PBS), a primary color light filter, a polarized color combining device and the like, integrates the three primary colors in different polarization states into the same polarized light and repeatedly utilizes another polarized light with a certain primary color so as to improve an optical utilization rate; the image signal module is a monolithic reflection type liquid crystal light modulation device and sequentially loads an image signal to the three-primary color polarized light according to image signals corresponding to the primary colors; and the light carrying the image signals is projected on a screen by the projection lens.

Description

technical field [0001] The invention relates to a projection display system, in particular to a light engine system for a compact reflective liquid crystal projection display. Background technique [0002] Projection display has become the mainstream method of large-screen high-definition dynamic display, and is widely used in important links such as business, education, scientific research, entertainment and family. In recent years, with the rapid development of many technologies such as microelectronics, optics, and processing technology, as well as the popularization of modern business mobile office models and the increase of handheld digital products, miniaturization has become a new direction for the development of projection display technology. Micro-projectors have significant advantages such as lightness and ease of use, and can be combined with various consumer electronics products, which makes the application of micro-projectors infinitely broad. [0003] Micro pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G02B27/28G02B27/18F21V13/00F21Y101/02F21Y113/13F21Y115/10
Inventor 陆巍贺银波
Owner 杭州研明光电技术有限公司
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