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Liquid crystal rear-projection optical engine

An optical engine and rear projection technology, applied in optics, optical components, nonlinear optics, etc., can solve problems such as high device requirements, complex system structure, and increased working distance after the projection objective lens, so as to achieve simple system structure, optical components Low requirements and the effect of overcoming geometric image distortion

Inactive Publication Date: 2004-03-24
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, there is a square prism between the projection display objective lens and the liquid crystal panel, which increases the requirement for the rear working distance of the projection objective lens, the system structure is complex, and the device requirements are high.

Method used

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  • Liquid crystal rear-projection optical engine
  • Liquid crystal rear-projection optical engine
  • Liquid crystal rear-projection optical engine

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Embodiment Construction

[0010] Such as figure 2 shown. An ellipsoid reflective bowl high pressure short-arc mercury lamp 12 is used as the light source, and the light emitted by the light source 12 converges on the incident end surface of the integrator 11 . The integrator 11 adopts a hollow square rod or a solid glass square rod. The function of the integrator 11 is to set a special element 10 for dual polarization multiplexing on the end face of the integrator emitted by the lamp source 12, so that the beam after the integrator is uniformly beamed can realize the Two orthogonal polarized lights are converted into polarized light with a single polarization direction. The light beam is separated into blue light by the dichroic beam splitter 9, reflected into the blue light channel, and passed through the 2b' polarizer to irradiate the blue light modulated LCD panel LCb. After being analyzed by the polarizer 2b, the image is projected on the screen through the projection objective lens 1b. The ligh...

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Abstract

The invention discloses a liquid crystal rear-projection optical engine. Three colored optical axes are parallel with one another, to shift the red and blue lenses to axis line of green channel to make the liquid crystal plate's and lenses' centers of the red and blue channels have a parallel displacement, so that both the red and blue liquid crystal plates' images move to the project image of the green liquid crystal plate, and it can make red, green and blue images coincide centrally on the screen and the three-colored images have not trapeziform deformation, reducing the burden of circuit adjusting.

Description

technical field [0001] The invention relates to a liquid crystal rear projection optical engine. Background technique [0002] Liquid crystal projection display has become the key technology of modern data display in recent years, and has been widely used in rear projection TV. There are basically two types of optical engines used in conventional liquid crystal rear projection: one is the use of single-color liquid crystal display panels, using optical The system performs image amplification, so that the optical engine is a single-board liquid crystal rear projection optical engine, such as Figure 1a Shown; Another type is a high-performance liquid crystal rear projection display optical engine system, such as Figure 1b As shown in the figure, this type of system uses a three-color composite square prism, which is combined with a single projection objective lens to form a projection display. In this way, there is a square prism between the projec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28G02F1/13G03B21/14
Inventor 刘旭刘向东李海峰
Owner ZHEJIANG UNIV