Systems, devices, and methods for variable luminance in wearable heads-up displays
First Claim
1. A wearable heads-up display (“
- WHUD”
) comprising;
a support structure worn on a head of a user;
a laser projector carried by the support structure, the laser projector comprising;
at least one laser diode to provide a laser light; and
at least one scan mirror positioned to receive the laser light from the at least one diode and controllably orientable to redirect the laser light over a range of angles;
a liquid crystal element positioned in an optical path of the laser light between the at least one laser diode and the at least one scan mirror;
a controller communicatively coupled to the liquid crystal element, wherein an opacity of the liquid crystal element is modulatable in response to signals from the controller and wherein the laser light is attenuated in response to the modulated opacity of the liquid crystal element; and
a transparent combiner carried by the support structure and positioned within a field of view of the user, the transparent combiner to direct the laser light from an output of the laser projector into the field of view of the user.
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Accused Products
Abstract
Systems, devices, and methods for laser projectors with variable luminance that are well-suited for use in a wearable heads-up display (“WHUD”) are described. Such laser projectors include a laser light source(s) and a scan mirror(s) to generate an image in the field of view of a user, and a liquid crystal element between the light source(s) and the scan mirror(s) to adjust the luminance of the image. The liquid crystal element is on an optical path between the laser light source(s) and the scan mirror and is communicatively coupled to a controller that modulates an opacity of the liquid crystal element. The opacity of the liquid crystal element determines the luminance of the image and may be altered in response to different factors, such as ambient light. Particular applications of the laser projector systems, devices, and methods in a wearable heads-up display are described.
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Citations
8 Claims
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1. A wearable heads-up display (“
- WHUD”
) comprising;a support structure worn on a head of a user; a laser projector carried by the support structure, the laser projector comprising; at least one laser diode to provide a laser light; and at least one scan mirror positioned to receive the laser light from the at least one diode and controllably orientable to redirect the laser light over a range of angles; a liquid crystal element positioned in an optical path of the laser light between the at least one laser diode and the at least one scan mirror; a controller communicatively coupled to the liquid crystal element, wherein an opacity of the liquid crystal element is modulatable in response to signals from the controller and wherein the laser light is attenuated in response to the modulated opacity of the liquid crystal element; and a transparent combiner carried by the support structure and positioned within a field of view of the user, the transparent combiner to direct the laser light from an output of the laser projector into the field of view of the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- WHUD”
Specification