Optical: systems and elements – Projection screen – Rear projection screen
Reexamination Certificate
2005-02-23
2008-12-02
Lee, Diane I. (Department: 2851)
Optical: systems and elements
Projection screen
Rear projection screen
C359S457000, C359S454000, C359S742000
Reexamination Certificate
active
07460301
ABSTRACT:
The present invention provides a technique suitable for making a set more compact by realizing reduction in height and reduction in depth. An image display apparatus of the present invention includes a reflecting mirror (4) for reflecting the image sent from a projection lens (2), and guiding the image to a transmissive screen (3). The reflecting-mirror (4) includes a planar mirror section (4a) for reflecting, of the entire image exiting the projection lens (2), only image portions projected onto the upper section of the transmissive screen (3), and a Fresnel mirror section (4b) with multiple reflective prisms for reflecting only image portions projected onto the lower section of the screen (3).
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Imafuku Daisuke
Ohishi Tetsu
Yoshikawa Hiroki
Cruz Magda
Hitachi , Ltd.
Lee Diane I.
McDermott Will & Emery LLP
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