Screen
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsHiroshi Yamaguchi, Kazuhiro Yamada
Life of this patent
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Abstract
A screen disclosed herein is a screen having a reflectivity, which causes diffuse reflection of an image projected by a projector, and a transparency, which allows transmission of a background, and including an uneven sheet, a semi-transmissive reflecting layer, and a transparent layer. The uneven sheet includes a transparent material, and has one principal surface that is flat and the other principal surface that is an uneven surface provided with a plurality of recesses and protrusions. The first principal surface and the second principal surface are opposite to each other. The reflecting layer is formed on the uneven surface of the uneven sheet. The transparent layer covers the reflecting layer. The reflecting layer is a thin film having a thickness ranging from 2 nm to 1 μm.
Claims10
A screen having a reflectivity, which causes diffuse reflection of an image projected by a projector, and a transparency, which allows transmission of a background, the screen comprising:
- an uneven sheet that comprises a transparent material, and has a first principal surface that is flat and a second principal surface that is an uneven surface provided with a plurality of recesses and protrusions, the first principal surface and the second principal surface being opposite to each other;
- a reflecting layer that is semi-transmissive and formed on the uneven surface of the uneven sheet;
- and
- a transparent layer that covers the reflecting layer,
- wherein the uneven surface has an inclination angle distribution in which a distribution rate of an inclination angle of 25 degrees is at least 0.3%/degree and a percentage that the distribution rate of the inclination angle of at least 40 degrees accounts for is at most 20%.
A projection system projecting an image, the projection system comprising:
- a screen having a reflectivity, which causes diffuse reflection of the image projected by a projector, and transparency which allows transmission of a background, the screen including:
- an uneven sheet that comprises a transparent material, and has a first principal surface that is flat and second principal surface that is an uneven surface provided with a plurality of recesses and protrusions, the first principal surface and the second principal surface being opposite to each other;
- a reflecting layer that is semi-transmissive and formed on the uneven surface of the uneven sheet;
- and
- a transparent layer that covers the reflecting layer;
- and
- a projector, projecting the image onto the screen,
- wherein the uneven surface has an inclination angle distribution in which a distribution rate of an inclination angle of 25 degrees is at least 0.3%/degree and a percentage that the distribution rate of the inclination angle of at least 40 degrees accounts for is at most 20%.
Dependencies are inferred from the claim text.