HEAD UP DISPLAY SYSTEM
First Claim
1. A head up display apparatus comprising a signal processing system,the signal processing system comprising an image projector for projecting an image to a partially reflective screen, said screen being configured substantially in front of an eye of a user of the display apparatus,the apparatus further comprising a beam steering arrangement for steering the projected image substantially at an exit pupil of the system such that the projected image becomes directed upon the screen, and a pupil tracking arrangement for tracking a pupil of the user'"'"'s eye,the pupil tracking arrangement comprising at least one light detector and a mirror arrangement, and at least one mirror actuator which is responsive to signals from said at least one light detector to effect a repositioning of the mirror arrangement, such that the projected image remains directed at the pupil of the user as the user adjusts their line of sight.
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Accused Products
Abstract
A head up display apparatus is disclosed for projecting an image upon a screen. The apparatus comprises a signal processing system, comprising an image projector for projecting an image to a partially reflective screen, the screen being configured substantially in front of an eye of a user of the display apparatus. The apparatus further comprises a beam steering arrangement for steering the projected image substantially at an exit pupil of the system, upon the screen, and a pupil tracking arrangement for tracking a pupil of the users eye such that the projected image remains directed at the pupil of the user as the user adjusts their line of sight.
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Citations
13 Claims
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1. A head up display apparatus comprising a signal processing system,
the signal processing system comprising an image projector for projecting an image to a partially reflective screen, said screen being configured substantially in front of an eye of a user of the display apparatus, the apparatus further comprising a beam steering arrangement for steering the projected image substantially at an exit pupil of the system such that the projected image becomes directed upon the screen, and a pupil tracking arrangement for tracking a pupil of the user'"'"'s eye, the pupil tracking arrangement comprising at least one light detector and a mirror arrangement, and at least one mirror actuator which is responsive to signals from said at least one light detector to effect a repositioning of the mirror arrangement, such that the projected image remains directed at the pupil of the user as the user adjusts their line of sight.
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12. A method of operating a head up display comprising a signal processing system, a beam steering arrangement, a screen and a pupil tracking arrangement comprising at least one light detector, a mirror arrangement and at least one mirror actuator, the method comprising the steps of:
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projecting an image onto the screen tracking the pupil of the user'"'"'s eye using the pupil tracking arrangement and steering the projected image substantially at an exit pupil of the system using the beam steering arrangement, such that the projected image becomes directed upon the screen, repositioning the mirror arrangement using the mirror actuators in response to signals received from the at least one light detector, such that the projected image remains directed at a pupil of the user as the user adjusts their line of sight.
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Specification