An optical see-through glass type display device comprises: an image projector projecting a virtual image; a first optical element configured to guide light of the virtual image; and a second optical element having a first reflection surface for reflecting back light coming through the front surface of the second optical element and a second reflection surface for retro-reflecting light coming through the rear surface of the second optical element. The second optical element is switchable between a first state in which the reflection on the first and second reflection surfaces is enabled and a second state in which the reflection on the first and second reflection surfaces is disabled.

A head-mounted display system comprises a frame, an imaging system and an optical system. The frame is configured to be mounted to a head of a user. The imaging system is configured to couple to the frame, and includes one or more display devices disposed on a substrate and one or more sensors disposed on the substrate. The optical system is configured to provide an optical path between an eye of the user and the one or more sensors, and configured to provide the same optical path between the eye of the user and the one or more display devices.

A viewpoint detector includes an imager that captures an image of an eye of a user and outputs the captured image, and a controller that detects a viewpoint of the user based on the captured image. The controller detects a position of the viewpoint from the captured image, and corrects the detected position of the viewpoint to a corrected viewpoint position with a conversion table.

According to one embodiment, when displaying an image on a display panel, projecting an image which is displayed on the display panel, inclining the image which is projected from the display panel at a predetermined angle of bend, and reflecting the image which is projected from the display panel via a prism and guiding the image to a projection surface, a display device corrects input picture image of the prism based on characteristics contrary to the chromatic aberration characteristics of the prism.

Methods and systems for presenting an object on to a screen of a head mounted display (HMD) include receiving an image of a real-world environment in proximity of a user wearing the HMD. The image is received from one or more forward facing cameras of the HMD and processed for rendering on a screen of the HMD by a processor within the HMD. A gaze direction of the user wearing the HMD, is detected using one or more gaze detecting cameras of the HMD that are directed toward one or each eye of the user. Images captured by the forward facing cameras are analyzed to identify an object captured in the real-world environment that is in line with the gaze direction of the user, wherein the image of the object is rendered at a first virtual distance that causes the object to appear out-of-focus when presented to the user. A signal is generated to adjust a zoom factor for lens of the one or more forward facing cameras so as to cause the object to be brought into focus. The adjustment of the zoom factor causes the image of the object to be presented on the screen of the HMD at a second virtual distance that allows the object to be discernible by the user.

A method, an apparatus, and a computer program product for modulating optics in a display are provided. An apparatus forms a plurality of zone plates in a liquid crystal using electric fields. Each zone plate has a center, and the centers are aligned along a first axis of the display. The apparatus moves the plurality of zone plates in a first direction along a second axis of the display different from the first axis of the display, while maintaining alignment of the centers of the plurality of zone plates along the first axis. Such movement is provided through repositioning of electric fields through the liquid crystal.

Optical devices and cognitive prosthetics based on novel components for enhanced human vision, selective video/television display, digital processing and/or unique image analysis to modify the image that a user sees and significantly improve the perception of that user are disclosed. What the user sees is responsive to specific perceptual and informational needs of the user in real time. Devices from the parent patents are herein made both more useful in practical day-to-day use and are more widely applicable to improving the ability of a user to perceive visual stimuli.

A vehicle, a head-up displaying system and a projector are provided, the projector including a displaying component (1) configured to project an image, and a three-mirror optical device positioned in an optical path of an emergent light of the displaying component (1), configured to reflect the image projected by the displaying component (1) onto a front windshield (5) such that the front windshield (5) reflects the image to eyes of a driver and including: a zoom lens assembly (2) having a zoom lens (21) for zooming in/out the image projected by the displaying component (1), and a first curvature adjusting component configured to adjust a curvature of the zoom lens (21); an image quality compensation lens assembly (3) having an image quality compensation lens (31) configured to compensate for an image quality distortion caused during a change of the curvature of the zoom lens (21), and a second curvature adjusting component configured to adjust a curvature of the image quality compensation lens (31); and a front windshield compensation lens assembly (4) configured to compensate for an image distortion caused by the front windshield (5).

Provided is a display apparatus including an image generator configured to time-sequentially generate a plurality of images by modulating light, and an optical system including a freeform surface that is configured to time-sequentially form a plurality of virtual images respectively corresponding to the plurality of images at different depths from a user's eye, wherein each error value among error values between the plurality of images and the plurality of virtual images respectively corresponding to the plurality of images on the freeform surface is less than or equal to a profile value of the freeform surface.

An eye tracking system can include a first camera configured to capture a first plurality of visual data of a right eye at a first sampling rate. The system can include a second camera configured to capture a second plurality of visual data of a left eye at a second sampling rate. The second plurality of visual data can be captured during different sampling times than the first plurality of visual data. The system can estimate, based on at least some visual data of the first and second plurality of visual data, visual data of at least one of the right or left eye at a sampling time during which visual data of an eye for which the visual data is being estimated are not being captured. Eye movements of the eye based on at least some of the estimated visual data and at least some visual data of the first or second plurality of visual data can be determined.