Patent
Projection image display apparatus
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TLDR
In this paper, a simple image projection apparatus which prevents color shading is presented. Butler et al. provided a simple projection apparatus with three dichroic mirrors in parallel which separate light from a source into red, blue, and green components.Abstract:
An object of the present invention is to provide a simple image projection apparatus which prevents color shading. First, second and third dichroic mirrors are provided in parallel which separate light from a source into red, blue, and green components. First and second polarization beam splitters are provided with operative surfaces perpendicular to the dichroic mirrors for reflecting predetermined polarization light components of two colors to two reflection type liquid crystal devices. A third polarization beam splitter having an operative surface in parallel to the dichroic mirrors is provided for reflecting a predetermined polarized light component of the third color component to a third reflection type liquid crystal device. A cross dichroic prism device is provided for combining the modulated light from the three liquid crystal devices and transmitting the synthesized light for projection.read more
Citations
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Patent
Projection display system for reflective light valves
TL;DR: In this paper, a projection display system for reflective light valves includes a light source for generating a light beam having RGB light components, wherein the red light component is p-polarized and the green and blue light components are s-Polarized; a reflector structure having a plural polarizing beam splitter and dichroic filters therein, wherein each PBS and DF reflects a preselected light component and transmits a different pre selected light component.
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Image projection system with a polarizing beam splitter
TL;DR: In this article, a wire grid polarizing beam splitter is used as both the polarizer and the analyzer in an image projection system, which is capable of being oriented at various angles with respect to the source light beam and modulated beam, and accepts relatively divergent light.
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Projection type image display apparatus
TL;DR: A projection-type color image display as mentioned in this paper includes a light source for emitting white light, a first optical element for dividing the white light into a plurality of colored lights and for converging each colored light to form plurality of spots, the spots of each coloured light being formed at different positions from the positions of the other colored light.
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Projection type display apparatus
TL;DR: In this paper, a projection-type display apparatus, being suitable to be applied as a light source of a solid-state light source, in the place of a conventional lamp, comprises: a light-source unit, which is configured to emit a white-color light therefrom; a light separation optic system, which was configured to separate the white color light from the light source unit into three primary color lights, R (red-color), G (green-color) and B (blue-color).
References
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Patent
Arrangements for projection displays employing reflective light valves
TL;DR: In this article, a combining prism assembly combines the light reflected from each valve and directs the light onto a projection display, where separate polarizing means are placed in proximity to respective separate reflective light valves tuned to the color to be modulated.
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Optics for a single-lens video projector with color-specific polarization channels
TL;DR: In this article, a high-efficiency optical system for use in a liquid-crystal light-valve video projector was proposed, where high intensity, unpolarized white light is separated into primary color components by color-selective filters transmitting light containing both first and second polarization states.
Patent
Full color three dimensional projector
TL;DR: In this paper, a full color three dimensional projector comprising a light source for emitting light, a condensing means for condensing the emitted light and converting the light into a parallel light, and a color separating means for separating the parallel light into red, blue and green color components, was described.
Patent
Three color channel, two-elevation optics for a single lens video projector
TL;DR: In this article, a high-efficiency optical system for use in a liquid-crystal light-valve video projector was proposed, where high intensity, unpolarized white light is separated into primary color components by color-selective filters transmitting light containing both first and second polarization states.
Patent
Liquid crystal display projector
TL;DR: In this article, a liquid crystal display (LCD) projector capable of converting a luminous flux from a light source lamp into a linear polarized beam at high efficiency and providing high-brightness high-uniformity images whose illuminance is uniform all over the projection screen is realized.