Color helmet mountable display
First Claim
1. A helmet mountable display system for displaying left and right pixelated images onto a visor for viewing by a wearer of the helmet, said display system comprising:
- left and right optical channels having respective central optical axes that are substantially parallel to each other, each channel comprising;
an array of light sources forming a complete scan line of said image in one-to-one correspondence with the image pixels, said light sources projecting first divergent luminance patterns for successive scan lines;
a lens for reducing the divergence of said first luminance patterns;
a back projection screen positioned to project said images onto the visor;
a scanning deflector; and
a deflector actuator controlling said scanning deflector to deflect successive first luminance patterns transmitted through the lens back through said lens so that the lens focuses the patterns onto successive scan lines on the screen'"'"'s back side, said screen emitting a second luminance pattern for each successive scan line to project the pixelated image onto the visor,said deflector actuators in said left and right optical channels comprising a single common drive motor for controlling both deflectors.
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Accused Products
Abstract
A lighter weight helmet mountable display (HMD) that is easily adjustable to accommodate variable inter-pupillary distances includes substantially parallel left and right optical channels, and projects left and right images onto the helmet'"'"'s visor. Each channel includes light sources that form a complete scan line of the image, and project luminance patterns for successive scan lines through a lens which reduces the light'"'"'s divergence. A deflector is moved to deflect successive luminance patterns back through the lens so that the lens focuses the patterns onto successive scan lines on a back projection screen. The screen emits luminance patterns in response to the incident luminance patterns for each successive scan line to project the image onto the visor.
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Citations
18 Claims
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1. A helmet mountable display system for displaying left and right pixelated images onto a visor for viewing by a wearer of the helmet, said display system comprising:
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left and right optical channels having respective central optical axes that are substantially parallel to each other, each channel comprising; an array of light sources forming a complete scan line of said image in one-to-one correspondence with the image pixels, said light sources projecting first divergent luminance patterns for successive scan lines; a lens for reducing the divergence of said first luminance patterns; a back projection screen positioned to project said images onto the visor; a scanning deflector; and a deflector actuator controlling said scanning deflector to deflect successive first luminance patterns transmitted through the lens back through said lens so that the lens focuses the patterns onto successive scan lines on the screen'"'"'s back side, said screen emitting a second luminance pattern for each successive scan line to project the pixelated image onto the visor, said deflector actuators in said left and right optical channels comprising a single common drive motor for controlling both deflectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A helmet mountable display (HMD), comprising:
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parallel left and right optical channels for projecting left and right images scan lines; left and right scanning deflectors; a common drive motor for controlling said scanning deflectors to deflect successive image scan lines back through the optical channels to project an image onto a visor; and an adjustment mechanism that adjust the spacing between the channels without moving the left and right scanning deflectors to accommodate varying inter-pupillary distances while maintaining the channels parallel orientation to prevent distortion. - View Dependent Claims (17, 18)
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Specification