摘要:
Embodiments of apparatuses, methods and systems for deployable projection screens are generally described herein. Other embodiments may be described and claimed.
摘要:
The ultra-thin rear projection display device described herein includes a lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. The screen may be a Fresnel lens having a plurality of bumps on the output surface to reduce the visibility of a stray light image. The Fresnel lens may have a diffusion layer on the output side of the Fresnel lens.
摘要:
An image projection system improves the brightness and/or color balance of a projected image. The system includes an auxiliary light source from which compensating light co-propagates with polychromatic light emitted by a primary light source along a primary light path. The compensating light has an emission energy content that minimizes an emission energy imbalance introduced by the primary light source. In a first preferred embodiment, the auxiliary light source is affixed at a location near the entrance end of a light tunnel such that the compensating light coincides with the primary light path before first reflection occurs. In a second preferred embodiment, the auxiliary light source is coupled to a light reflector adjacent to the primary light source and thereby allows the compensating light to propagate through the image projection system with the same efficiency as that of the light generated by the primary light source.
摘要:
An image projector has an optical path including, from upstream to downstream, a light source, a light pipe, a polarization conversion prism, a positive lens group and a light valve. The light pipe has an outlet and an inlet, and is constructed to receive light from the light source and to produce a unique projection display format as light is transmitted therethrough. The polarization conversion prism recycles light to optimize the amount of light that is properly polarized in the system. The positive lens group includes at least one positive lens positioned downstream of the polarization conversion prism. The positive lens group images the outlet of the light pipe onto the light valve.