Three-dimensional projection display system based on liquid crystal polarization rotation

A polarization rotation, three-dimensional projection technology, applied in photography, stereo photography, optics, etc., can solve the problems of high system cost and complicated operation, and achieve the effect of reducing cost, high stability, and convenient system installation and use

Inactive Publication Date: 2012-06-27
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of such a system is high, the position of the two proje...

Method used

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  • Three-dimensional projection display system based on liquid crystal polarization rotation
  • Three-dimensional projection display system based on liquid crystal polarization rotation
  • Three-dimensional projection display system based on liquid crystal polarization rotation

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Experimental program
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Embodiment 1

[0060] refer to figure 1, the three-dimensional projection display system includes: a white light source 11; a beam shaping and shimming device 12 for shaping and shimming the light emitted by the light source to obtain a parallel and uniform light field; a color filter type color projection display for generating projected images Chip 13; broadband liquid crystal polarization rotator 14, by adjusting the loading voltage, the phase delay of o-e light can be changed by 0 and π, so that the polarization direction of the outgoing light will not rotate and rotate to the vertical polarization direction of the incident light; timing control circuit 15 coordinate the signal synchronization between the projection display chip 13 and the liquid crystal polarization rotator 14; the projection lens 16 is used to project the image onto the screen; the projection screen 17; Watch Glasses 18.

[0061] The white light source 11 can be a single white LED lamp, a single halogen lamp, or three...

Embodiment 2

[0065] Figure 4 It is another three-dimensional projection display system according to Embodiment 2 of the general concept of the present invention. The three-dimensional projection display system includes: a red light source 23, a green light source 24, and a blue light source 25; color combining prisms 26 and 27; a beam shaping and shim device 12; a sequential color projection display chip 28 for generating projected images, the chip There is no color filter, and the signals of three colors are time-divisionally projected; the liquid crystal polarization rotator 29, by adjusting the loading voltage, changes the phase delay of o-e light by 0 and π; the timing control circuit 15 coordinates the red light source 23, the green light source 24, Signal synchronization among blue light source 25, projection display chip 28 and liquid crystal polarization rotator 29; projection lens 16; projection screen 17; viewing glasses 18 with two lenses whose polarization directions are ortho...

Embodiment 3

[0069] Figure 5 It is another three-dimensional projection display system according to Embodiment 3 of the general concept of the present invention. The three-dimensional projection display system includes: a red light source 23, a green light source 24, and a blue light source 25; each sub-optical path includes a beam shaping and shimming device 12, a projection display chip 30 / 32 / 34 and liquid crystal polarization rotator 31 / 33 / 35; timing control circuit 15; color combining prism 36, used to combine three colors of light; projection lens 16; projection screen 17; . This method is different from Embodiment 2 in that: the light sources 23 / 24 / 25 of the three colors emit light continuously, and the RGB signals are projected through an independent optical path. The signal loading of the display chip 30 / 32 / 34 and the liquid crystal polarization rotator 31 / 33 / 35 phase modulation, the modulation frequency of the two is reduced to 120Hz. Moreover, the timing control circuit 45 ...

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Abstract

The invention discloses a three-dimensional projection display system based on liquid crystal polarization rotation, which solves the problem that an existing three-dimensional projection display system particularly needs two projectors to respectively project images at a left view angle and a right view angle, and consequently is complicated in adjustment. The three-dimensional projection display system comprises a light source, a beam shaping and shimming device, a projection display chip, a liquid crystal polarization rotator, a sequential control circuit, a projection lens, a projection screen and watching glasses with two lenses in orthogonal polarization analysis directions. The three-dimensional projection display system is capable of realizing three-dimensional projection with a single projector, simple in structure, high in stability, low in cost, fine in three-dimensional effect and applicable to three-dimensional projection display for movie theaters and home entertainment.

Description

technical field [0001] The invention relates to the technical field of three-dimensional display and liquid crystal polarization rotation, in particular to a three-dimensional projection display system based on liquid crystal polarization rotation. Background technique [0002] Polarized stereoscopic projection is currently the most marketable and effective display technology. The usual implementation method needs to use two projectors to project, and through special hardware output and synchronization, the left and right eye images will be projected separately, and the observer wears polarized glasses to receive the images of the left and right eyes respectively. However, the cost of such a system is high, the positions of the two projectors need to be strictly corrected during use, and the operation is cumbersome. With the marketization and performance improvement of liquid crystal panels, the liquid crystal polarization rotator can simplify the polarization stereoscopic ...

Claims

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Application Information

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IPC IPC(8): G03B35/18G02B27/26G02B27/09G02B30/25
Inventor 杨福桂王安廷明海董磊崔哲顾春许立新
Owner UNIV OF SCI & TECH OF CHINA
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