A projector, such as for eyewear, having a first and second shield that individually sink heat from a light source and provide electromagnetic (EM) shielding for the projector, and a processor controlling the projector. The shields sink heat evenly and efficiently, to different portions of the eyewear. In one example, the heat is directed in different directions. The shields encompass the light source and the processor, and they may be parallel to one another. The thickness of the shield coupled to the light source is thicker proximate the light source. The shields may be separated from each other by a thermal insulating material.

A projector, such as for eyewear, having a first and second shield that individually sink heat from a light source and provide electromagnetic (EM) shielding for the projector, and a processor controlling the projector. The shields sink heat evenly and efficiently, to different portions of the eyewear. In one example, the heat is directed in different directions. The shields encompass the light source and the processor, and they may be parallel to one another. The thickness of the shield coupled to the light source is thicker proximate the light source. The shields may be separated from each other by a thermal insulating material.

A direct projection light field display comprising an array of projectors for direct projection of a light field. The overall design and incorporation of additional optics achieve the optimal light distribution and small pixel size to produce a high definition, 3D display. The architecture of the direct projection light field display has low a brightness requirement for each projector, resulting in an increased projector density, decreased system, and a decreased power requirement, while producing a high-definition light field.

A projection lens includes a first lens group, an aperture stop, a second lens group, a reflective optical element, and a refractive optical element arranged in sequence on a transmission path of an image beam. The first lens group, the aperture stop and the second lens group are sequentially arranged from a minified side to a magnified side along an optical axis. The reflective optical element and the refractive optical element are located on opposite sides of the optical axis. The image beam sequentially passes through the first lens group, the aperture stop and the second lens group from the minified side to be transmitted to the reflective optical element. The image beam is reflected by the reflective optical element to the refractive optical element, and passes through the refractive optical element to form a projection beam toward the magnified side.

Provided is a projection lens including: a first optical system configured to form an intermediate image from an enlargement conjugate side toward a reduction conjugate side; and a second optical system configured to image the intermediate image onto an imaging plane on the reduction conjugate side, wherein the first optical system at least includes a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, wherein the second lens unit is arranged on the reduction conjugate side with respect to the first lens unit, and wherein the first lens unit and the second lens unit are configured to move in different trajectories on an optical axis so that curvature of field is adjusted.

A system for displaying information indicative of driving conditions, to a driver, using a smart ring are disclosed. An exemplary system includes a smart ring with a ring band having a plurality of surfaces including an inner surface, an outer surface, a first side surface, and a second side surface. The system further includes a processor, configured to obtain data from a communication module within the ring band, or from one or more sensors disposed within the ring band. The obtained data are representative of information indicative of one or more driving conditions to be displayed to the driver. The smart ring also includes a projector module display disposed on at least one of the plurality of surfaces, and configured to present information indicative of the one or more driving conditions.

A projection lens including a first lens group, an aperture stop, a second lens group, and a reflective optical element sequentially arranged from a reduction side to a magnification side along an optical axis is provided. The first lens group has positive refractive power. The second lens group has negative refractive power. The reflective optical element has positive refractive power. The projection lens satisfies 1.2<|F.sub.2/F.sub.1|<3.5, wherein F.sub.2 is an effective focal length of the reflective optical element, and F.sub.1 is an effective focal length of the first lens group and the second lens group. A projection apparatus is also provided.

A magnification adjustable projection system is provided that includes an imaging system having an object or image space, a first deformable lens plate located within the object or image space for contributing a first magnification power to the imaging system as a function of an amount of curvature of the first deformable lens plate, and a second deformable lens plate located within the object or image space for contributing a second magnification power to the imaging system as a function of an amount of curvature of the second deformable lens plate. The projection system also has first and second bending apparatuses that adjust the curvature of the first and second deformable lens plate through a range of curvature variation for adjusting the magnification power of the imaging system.

A wearable display device suitable for use in an augmented reality environment is disclosed. The wearable display device can include a projector configured to project light through diffractive optical elements that then distributed the light to multiple display regions. Each of the display regions can be arranged to project light out of the wearable display device towards an eye of a user. Since each of the display regions are positioned in different locations with respect to an eye of a user, the result is that each display region directs light in a different direction. In this way the apparent field of view for a user of the wearable display can be substantially increased.

A wearable display device suitable for use in an augmented reality environment is disclosed. The wearable display device can include a projector configured to project light through diffractive optical elements that then distributed the light to multiple display regions. Each of the display regions can be arranged to project light out of the wearable display device towards an eye of a user. Since each of the display regions are positioned in different locations with respect to an eye of a user, the result is that each display region directs light in a different direction. In this way the apparent field of view for a user of the wearable display can be substantially increased.