Uniform-brightness, high-gain display structures and methods

G - Physics – 03 – B

Patent

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G03B 21/56 (2006.01) G02B 27/18 (2006.01) G09B 9/32 (2006.01)

Patent

CA 2162757

A uniform-brightness, high-gain projection screen (102) is especially suited for reflecting radiation from a projector (104, 106) to a viewer (112) who is spaced from the projector along a projection axis (108, 110). The screen is formed with a plurality of reflective faces (120, 122) that each form at least a portion of a ring that is transverse to the projector axis, have different spacings from the projector and are axially tilted to set the projector-face angle (132) equal to the viewer-face angle (134). The faces are preferably defined by a plurality of tiles (150) that are bonded to the interior of a projection dome (103) such as a flight simulator dome.

L'invention concerne un écran de projection (102) à luminosité amplifiée et uniforme convenant spécialement pour réfléchir les rayonnements d'un projecteur (104, 106) à un spectateur (112) qui est à l'écart du projecteur et est placé le long d'un axe de projection (108, 110). L'écran est formé de plusieurs faces réfléchissantes (120, 122) qui forment chacune au moins une partie d'un anneau transversal par rapport à l'axe de projection, sont espacées différemment par rapport au projecteur et sont inclinées axialement de sorte à rendre l'angle de la face du projecteur (132) égal à celui de la face du spectateur (134). Les faces sont de préférence définies par plusieurs carreaux (150) qui sont collés à l'intérieur d'un dôme de projection (103), comme un dôme de simulateur de vol.

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