A display screen arrangement is for use in a motor vehicle and includes an electronic display screen. A pair of optical elements are slidably mounted over the display screen and are movable in opposite lateral directions. An actuator is coupled to the optical elements and moves the optical elements in the opposite lateral directions. A processor is communicatively coupled to the actuator and causes the actuator to move the optical elements to positions dependent upon an image being presented on the display screen.

A supporting case for use with a smart device such as a smart phone to assist a visually impaired individual. The case has a lower surface for positioning over a viewing surface containing material to be viewed by the individual and a pocket configured and dimensioned to receive and support the smart device. The case includes one or both of a lifting system for lifting and holding the case hands-free at a pre-set distance above the material to be viewed and a distance viewing system to view material not underneath the case.

An eyepiece includes a focusing apparatus for positioning the area perceived as in focus by the relaxed human eye and for correcting axial ametropia of an eye of a user of the eyepiece and a correction apparatus for adjustable correction of an astigmatism of an eye of a user of the eyepiece.

The invention relates to personal display devices and in particular an eyepiece therefor. The eyepiece is adapted for projecting an image from an image plane on one side of the eyepiece through an exit pupil on the opposite side of the eyepiece and comprises at least one stationary lens group and at least two movable lens groups being movable with respect to the stationary lens group along an optical axis between the image plane and the exit pupil. According to the invention, the lens groups are arranged in positive-negative-positive configuration and the movable lens groups are arranged to move along the optical axis between a first state providing a first field-of-view and a second state providing a second field-of-view smaller than the first field-of-view to the image plane. The invention allows for improving optical performance and user experience of personal display devices.

The present invention provides a digital loupe device and its automatic view stabilizing method. The digital loupe device is worn or head-mounted on the operator's head via a wearable frame that is connected to a plural of axial rotation modules. A pair of lighting capture modules set on the axial rotation module is used to illuminate the target view and capture the image of the target view in order to send feedback signal. Both the lighting capture modules and axial rotation modules are electronically connected to at least one control unit. The control unit, base on the feedback signal received, moves the lighting capture modules via the axial rotation modules till the desired image of the target view is obtained. The display module connected to the wearable frame can show the captured image and information provided by the control unit.

A customized viewing system for an optical device to alleviate back and neck strain.

A supply circuit for supplying a light-emitting element includes a voltage regulator having a voltage output for outputting an output voltage and having a control input for regulating the output voltage based on a voltage at a divider node of a voltage divider. A first and a second terminal are used to connect the light emitting element, the first terminal being coupled to the voltage output and the second terminal being coupled to a reference potential terminal via a series resistor. The supply circuit further includes a control block having an analog-to-digital converter for generating a digital voltage feedback value from a voltage applied to the second terminal, a control element, and a digital-to-analog converter coupled to the divider node for outputting an analog control signal based on a digital control value. The control element is arranged to compare the voltage feedback value with a reference feedback value, if the voltage feedback value is less than the reference feedback value, to change the control value in a first direction, and if the voltage feedback value is greater than the reference feedback value, to change the control value in a second direction.

A head-mounted display device includes a display panel including a plurality of pixels for displaying an image, a filter on the display panel, and including a scattering layer for scattering the image to generate a scattered image, the scattering layer including a base having a first refractive index, and scattering particles mixed with the base and having a second refractive index that is greater than the first refractive index, and an optical system on the filter for magnifying the scattered image.

A fixture used in the manufacture of an eyepiece, to cut the eyepiece to a particular shape, and a method of using the fixture to cut the eyepiece to have a desired shape. Embodiments are directed to a configurable fixture to align, hold, and protect a plastic sheet (e.g., a wafer) while a laser cutting apparatus is cutting one or more eyepieces out of the wafer. During the cutting, the fixture protects the eyepieces from reflected laser light by providing voids around the laser cutting lines, and by supporting each eyepiece near its perimeter. The fixture can be quickly rearranged for different eyepieces, different eyepiece shapes, and/or different plastic sheet sizes.

The invention concerns a reversing system for a sighting telescope, where the reversing system has at least two mutually displaceable lenses in a tube of the reversing system parallel to an optical axis of the reversing system, where displacement of the at least two displaceable lenses modifies the reproduction scale at which an image projected onto a first image plane of the reversing system is shown on a second image plane of the reversing system, where the at least two displaceable lenses are arranged in all positions between the first and the second image plane, where a surface of the inside of a tube facing the optical axis having at least one absorption area with absorption zones for absorbing incident light and with sliding surfaces located between neighbouring absorption zones for bearings of the at least two displaceable lenses, where the total area of the sliding surfaces is smaller than the total area of the absorption zones, where the at least one sliding surface is arranged at a different distance from the optical axis than the at least one absorption zone.