Near eye head up display system and method with fixed combiner
First Claim
Patent Images
1. A near eye display comprising:
- a projector comprising a polarizing beam splitter coupled with a collimating mirror and configured to provide collimated light, wherein the projector is configured to perform catadioptric collimation and comprises an illuminator and an illuminator mirror on a first side of the polarizing beam splitter and between the illuminator and the polarizing beam splitter to receive illuminator light from the illuminator and reflect the illuminator light to the polarizing beam splitter, wherein an image source is disposed on a second side of the polarizing beam splitter opposite the first side, wherein the collimating mirror is attached to a third side of the polarizing beam splitter, the third side being a side farthest from the user under normal operation, a planoconvex lens is disposed between the illuminator mirror and the first side of the polarizing beam splitter, a convex surface of the planoconvex lens facing the polarizing beam splitter, and a collimating lens is disposed between the image source and the second side of the polarizing beam splitter; and
a combiner system configured to be disposed at a near eye location with respect to a user, the combiner system having an input end including a first diffraction grating for receiving the collimated light from the projector, and a combiner end including a second diffraction grating for receiving light from an outside scene and providing the collimated light received at the input end and the light received from the outside scene to the user, and an intermediate portion between the input end and the combiner end free of diffraction gratings, the intermediate portion configured to operate as a waveguide between the input end and the combiner end;
wherein the combiner system is unattached to the user and fixed at a distance within four inches of eyes of the user and is provided in front of both of the eyes of the user when in operation, the projector being disposed at the input end of the combiner system, the input end being horizontally opposite from the combiner end of the combiner system, wherein the projector is attached to the combiner system at a fourth side of the polarizing beam splitter opposite the third side,the combiner system including a first area associated with input of the collimated light at the input end and a second area associated with output of light at the combiner end, the first area being less than the second area such that the combiner system is configured to expand a pupil horizontally as the collimated light travels from the input end to the combiner end, andthe combiner system being configured to provide full binocular overlap at the combiner end via the pupil in a lateral eye box associated with the pupil such that information is displayed by the combiner system to both eyes of the user simultaneously,wherein the combiner system utilizes the waveguide and diffraction gratings such that the combiner system operates according to a periscopic effect where input rays of the collimated light at the input end are parallel to output rays of the light provided to the user.
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Accused Products
Abstract
A display, such as a fixed head up display, can be configured as a near eye display. Display can be used in the environment of the user. Display includes an image source fixed with the environment and a combiner system. The combiner system is configured to be disposed at a near eye location with respect to the user. The combiner system includes at least one diffraction grating member. The diffraction grating member has an input and for receiving an image from the image source and a combiner end for receiving light from the real world scene. The image received at the input end and the light received from the outside scene are provided to the user.
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Citations
16 Claims
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1. A near eye display comprising:
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a projector comprising a polarizing beam splitter coupled with a collimating mirror and configured to provide collimated light, wherein the projector is configured to perform catadioptric collimation and comprises an illuminator and an illuminator mirror on a first side of the polarizing beam splitter and between the illuminator and the polarizing beam splitter to receive illuminator light from the illuminator and reflect the illuminator light to the polarizing beam splitter, wherein an image source is disposed on a second side of the polarizing beam splitter opposite the first side, wherein the collimating mirror is attached to a third side of the polarizing beam splitter, the third side being a side farthest from the user under normal operation, a planoconvex lens is disposed between the illuminator mirror and the first side of the polarizing beam splitter, a convex surface of the planoconvex lens facing the polarizing beam splitter, and a collimating lens is disposed between the image source and the second side of the polarizing beam splitter; and a combiner system configured to be disposed at a near eye location with respect to a user, the combiner system having an input end including a first diffraction grating for receiving the collimated light from the projector, and a combiner end including a second diffraction grating for receiving light from an outside scene and providing the collimated light received at the input end and the light received from the outside scene to the user, and an intermediate portion between the input end and the combiner end free of diffraction gratings, the intermediate portion configured to operate as a waveguide between the input end and the combiner end; wherein the combiner system is unattached to the user and fixed at a distance within four inches of eyes of the user and is provided in front of both of the eyes of the user when in operation, the projector being disposed at the input end of the combiner system, the input end being horizontally opposite from the combiner end of the combiner system, wherein the projector is attached to the combiner system at a fourth side of the polarizing beam splitter opposite the third side, the combiner system including a first area associated with input of the collimated light at the input end and a second area associated with output of light at the combiner end, the first area being less than the second area such that the combiner system is configured to expand a pupil horizontally as the collimated light travels from the input end to the combiner end, and the combiner system being configured to provide full binocular overlap at the combiner end via the pupil in a lateral eye box associated with the pupil such that information is displayed by the combiner system to both eyes of the user simultaneously, wherein the combiner system utilizes the waveguide and diffraction gratings such that the combiner system operates according to a periscopic effect where input rays of the collimated light at the input end are parallel to output rays of the light provided to the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A mounted device comprising:
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a projector configured to provide a near collimated or collimated image, the projector comprising a polarizing beam splitter coupled with a collimating mirror and configured to provide collimated light, wherein the projector is configured to perform catadioptric collimation and comprises an illuminator and an illuminator mirror on a first side of the polarizing beam splitter and between the illuminator and the polarizing beam splitter to receive illuminator light from the illuminator and reflect the illuminator light to the polarizing beam splitter, wherein an image source is disposed on a second side of the polarizing beam splitter opposite the first side, wherein the collimating mirror is attached to a third side of the polarizing beam splitter, the third side being a side farthest from the user under normal operation, a planoconvex lens is disposed between the illuminator mirror and the first side of the polarizing beam splitter, a convex surface of the planoconvex lens facing the polarizing beam splitter, and a collimating lens is disposed between the image source and the second side of the polarizing beam splitter; and a combiner comprising a first diffraction grating member wherein the first diffraction grating member has a length of four inches or more, a width of 2 inches or less and a thickness of 0.5 inches or less and configured so that a first end of the first diffraction grating member can be provided in front of eyes of a user and a second end of the first diffraction grating member receives the collimated or near collimated image, wherein the projector is attached to the combiner at a fourth side of the polarizing beam splitter opposite the third side, wherein the first end receives light from a real world scene, the first end is associated with a first area for outputting light to the eyes of the user, and the second end is associated with a second area for receiving the collimated or near collimated image, the second area being less than the first area such that the first diffraction grating member provides horizontal pupil expansion, wherein the first end is horizontally opposite to the second end and the real world scene is viewed at a location of the horizontal pupil expansion, wherein full binocular overlap is provided in a lateral eye box associated with the horizontal pupil expansion such that information is provided to both eyes of the user simultaneously, wherein the combiner operates according to a periscopic effect where input rays of the collimated light are parallel to output rays of the light outputted to the eyes of the user. - View Dependent Claims (10, 11, 12)
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13. A method of providing guidance information to a pilot'"'"'s eyes in an aircraft, the method comprising:
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providing collimated or near collimated light indicative of the guidance information from a display to a first end of a passive element disposed within three inches of the pilot'"'"'s eyes using a polarizing beam splitter coupled with a collimating mirror, wherein the display is configured to perform catadioptric collimation and comprises an illuminator and an illuminator mirror on a first side of the polarizing beam splitter and between the illuminator and the polarizing beam splitter to receive illuminator light from the illuminator and reflect the illuminator light to the polarizing beam splitter, wherein an image source is disposed on a second side of the polarizing beam splitter opposite the first side, wherein the collimating mirror is attached to a third side of the polarizing beam splitter, the third side being a side farthest from the user under normal operation, the passive element being a combiner fixed relative to the pilot'"'"'s eyes, a fourth side of the display opposite the third side being fixed to the combiner during normal operation, a planoconvex lens is disposed between the illuminator mirror and the first side of the polarizing beam splitter, a convex surface of the planoconvex lens facing the polarizing beam splitter, and a collimating lens is disposed between the image source and the second side of the polarizing beam splitter; and combining light from a real world scene with the collimated or near collimated light using the passive element to output the combined light at a second end of the passive element, wherein the first end is associated with a first area that is less than a second area associated with the second end such that the passive element is configured to provide horizontal pupil expansion to the collimated or near collimated light and the real world scene is viewed at a location of the horizontal pupil expansion, wherein full binocular overlap is provided in a lateral eye box associated with the horizontal pupil expansion such that information is displayed to both of the pilot'"'"'s eyes simultaneously, wherein the passive element causes a periscopic effect where input rays of the collimated or near collimate light are parallel to output rays at the location of the horizontal pupil expansion. - View Dependent Claims (14, 15, 16)
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Specification