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Compact reflective liquid crystal projection light engine system

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

Active Publication Date: 2014-09-03
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 red light LED21, green light LED22, blue light LED23, green light homogenizer 211, green light homogenizer 221 and blue light homogenizer 231, red light LED21 and red light homogenizer 211 are connected, green light LED22 It is connected with the green light homogenizer 221 , and the blue light LED 23 is connected with the blue light homogenizer 231 .

[0030] The natural light of the three primary colors emitted by the red LED21, the green LED22 and the blue LED23 passes through the red light homogenizer 211, the green light homogenizer 221 and the blue light homogenizer 231 respectively, and collects them into small-angle rectangular light beams required for lighting.

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Embodiment 2

[0044] Figure 5 A second embodiment of the compact reflective liquid crystal projection system 1 of the present invention is given. Compared with 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 uniform device 221 are reversed, and the blue LED 23 and the blue light uniform device 231 remain unchanged. 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 the P polarization state, and the red light and blue light are in the 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 and blue lig...

Embodiment 3

[0046] Image 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 is composed of a first PBS31, a red-transmitting and blue-transmitting filter 321, a green-transmitting blue filter 322, a blue-transmitting red-green filter Optical plate 324 and broadband quarter-wave plate 331 are composed.

[0047] The wide-band quarter-wave plate 331 and the second wide-band quarter-wave plate 332 are respectively glued to the red light incident surface and the green light incident surface of the first PBS31, and then respectively bonded with the red-transmitting and anti-blue filter 321 and The green and blue anti-blue filter 322 is glued together, the red and blue anti-blue filter 321 is located on the red light incident surface of the first PBS31, and the green and blue anti-blue filter 322 is located on the green light incident surface of the first PBS31. The blue-tr...

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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. The light source module is composed of a three-primary solid light source and a dodging device, which provides color-saturated three-primary lighting for projection. The polarized light management module is composed of a polarization beam splitter (PBS), a primary color filter and a polarization color combining device, etc., which integrate the three primary color lights of different polarization states into the same polarized light and reuse another polarized light of a certain primary color. To improve optical utilization; the image signal module is a single-chip reflective liquid crystal light modulation device, which sequentially loads the image signal on the polarized light of the three primary colors according to the image signal corresponding to each primary color; the projection lens projects the light carrying the image signal on the screen superior.

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 Patents(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