Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes a display and a controller. The display includes: a backplane having a plurality of circuits and a plurality of display elements arranged on the backplane. The plurality of display elements form an irregular pattern. Each of the plurality of display elements is coupled to a respective circuit of the plurality of circuits. The controller is coupled to the display and configured to transmit at least one control signal to at least one display element of the display for modulating at least one property of the at least one display element.

Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, an optical device includes: an optical guiding device configured to guide light to propagate along a first direction within the optical guiding device; an in-coupling diffractive structure configured to diffract the light to propagate in the optical guiding device; and out-coupling diffractive structures configured to diffract at least part of the light out of the optical guiding device along a second direction different from the first direction. The out-coupling diffractive structures are configured to have gradually increased diffraction efficiencies for the light along the first direction away from the in-coupling diffractive structure.

Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes: a display having a plurality of display elements and a driving device coupled to the driving device and configured to: obtain a hologram for the display, wherein the hologram comprises, for each display element of the plurality of display elements, a respective sum of electromagnetic (EM) field contributions of a plurality of primitives corresponding to at least one object to the display element; and generate, for each display element of the plurality of display elements, a respective modulation control signal based on the respective sum of EM field contributions of the plurality of primitives to the display element.

Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes a display and a controller. The display includes: a backplane having a plurality of circuits and a plurality of display elements arranged on the backplane. The plurality of display elements form an irregular pattern. Each of the plurality of display elements is coupled to a respective circuit of the plurality of circuits. The controller is coupled to the display and configured to transmit at least one control signal to at least one display element of the display for modulating at least one property of the at least one display element.

Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes a display and a controller. The display includes: a backplane having a plurality of circuits and a plurality of display elements arranged on the backplane. The plurality of display elements form an irregular pattern. Each of the plurality of display elements is coupled to a respective circuit of the plurality of circuits. The controller is coupled to the display and configured to transmit at least one control signal to at least one display element of the display for modulating at least one property of the at least one display element.

Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a computer-implemented method of manipulating data of a plurality of primitives corresponding to at least one object includes: for each of a plurality of vertices of the plurality of primitives, associating a respective vertex identifier of the vertex with respective vertex data of the vertex, and storing the association between the respective vertex identifier and the respective vertex data of the vertex in a memory; and for each of the plurality of primitives, associating a respective primitive identifier of the primitive with one or more respective vertex identifiers of one or more vertices of the primitive in the memory, and storing an association between the respective primitive identifier and the one or more respective vertex identifiers for the primitive in the memory.

Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes a display and a controller. The display includes: a backplane having a plurality of circuits and a plurality of display elements arranged on the backplane. The plurality of display elements form an irregular pattern. Each of the plurality of display elements is coupled to a respective circuit of the plurality of circuits. The controller is coupled to the display and configured to transmit at least one control signal to at least one display element of the display for modulating at least one property of the at least one display element.

Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes a display and a controller. The display includes: a backplane having a plurality of circuits and a plurality of display elements arranged on the backplane. The plurality of display elements form an irregular pattern. Each of the plurality of display elements is coupled to a respective circuit of the plurality of circuits. The controller is coupled to the display and configured to transmit at least one control signal to at least one display element of the display for modulating at least one property of the at least one display element.

Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, a system includes a display and a controller. The display includes: a backplane having a plurality of circuits and a plurality of display elements arranged on the backplane. The plurality of display elements form an irregular pattern. Each of the plurality of display elements is coupled to a respective circuit of the plurality of circuits. The controller is coupled to the display and configured to transmit at least one control signal to at least one display element of the display for modulating at least one property of the at least one display element.

Abstract: Apparatus and methods for storing and transporting electronic devices. A housing includes a base, opposing sides, a movable cover, and an open lower end. The base has a cutout portion at the lower end. The movable cover is generally coextensive with and parallel to the base, and is resiliently biased into a normally closed position. The cover includes an access aperture at the lower end. Stop means are also provided at the lower end, partially blocking the opening and preventing a stored device from falling out of the housing's lower end. The cutout portion and the aperture allow entry of the user's hand into the housing for either insertion or withdrawal of the device. During either process, the user's hand causes the cover temporarily to be raised into an open position. A sling, a backpack harness, or a handle may be selectively attached to the housing for transport or storage.

Abstract: Apparatus and methods for storing and transporting electronic devices. A housing includes a base, opposing sides, a movable cover, and an open lower end. The base has a cutout portion at the lower end. The movable cover is generally coextensive with and parallel to the base, and is resiliently biased into a normally closed position. The cover includes an access aperture at the lower end. Stop means are also provided at the lower end, partially blocking the opening and preventing a stored device from falling out of the housing's lower end. The cutout portion and the aperture allow entry of the user's hand into the housing for either insertion or withdrawal of the device. During either process, the user's hand causes the cover temporarily to be raised into an open position. A sling, a backpack harness, or a handle may be selectively attached to the housing for transport or storage.

Abstract: An ultra lightweight hammock for suspension between two trees includes a rectangular top panel joined along at least three side and end edges to a bottom panel. An elongate opening permits access between the top and bottom panels. Tubular sleeves form each end of the hammock and receive elongate webs which extend from the ends of the tubular sleeves around an adjacent tree to be secured by an adjustable buckle attachment. An option pocket may be formed in the bottom panel to receive a sleeping pad.

Abstract: An ultra lightweight hammock for suspension between two trees includes a rectangular top panel joined along at least three side and end edges to a bottom panel. An elongate opening permits access between the top and bottom panels. Tubular sleeves form each end of the hammock and receive elongate webs which extend from the ends of the tubular sleeves around an adjacent tree to be secured by an adjustable buckle attachment. An option pocket may be formed in the bottom panel to receive a sleeping pad.

Abstract: A thermal device for maintaining the temperature of body extremities is provided. The device includes a pocket adapted to receive a heating element and a strap attached to the pocket such that the device is adapted to encircle and be secured around a portion of the human body. The pocket has a tri-fold configuration formed from a rear panel, a front panel, and an intermediate panel positioned atop one another, the intermediate panel being positioned between the front panel and the rear panel. Each of the three panels is connected along their respective vertical side edges. The first horizontal edges of the front panel and the rear panel are fixedly attached forming a first open space between the front panel and the intermediate panel and the second horizontal edges of the rear panel and the intermediate panel are fixedly attached forming a second open space therebetween.

Abstract: An electromagnetic indicator capable of binary indication including a rotatably mounted semicircular flag assembly which can rotate between a first position ("set") and a second position ("fault") upon the receipt by the indicator of an electrical signal. A portion of the flag assembly is permanently magnetized and is magnetically latched in either the "set" or "fault" position by a magnetic latch which is preferably comprised of a bracket and core bar. The bracket has two ends which are positioned so that they are adjacent the magnetized portion of the flag assembly. The core bar is magnetically connected to an electromagnet and is also positioned adjacent a magnetized portion of the flag assembly. When the electromagnet is connected to the appropriate terminal of an electrical power source, the electromagnet generates a magnetic field, magnetizes the two ends of the bracket means and the core bar, and causes the flag assembly to flip from the "set" position to the "fault" position, or vice versa.

Abstract: An indicator for monitoring a channel fault is located in each channel of a multichannel system. An interface is located between each indicator and channel being monitored to assure a response of the indicator under circumstances that a fault signal in the channel could not have otherwise activated the indicator.

Abstract: An indicator flag is movable alternately into one of a plurality of display positions thereby to provide a distinguishable visual indication in each position. The indicator flag carried by a movable assembly is actuated by electromagnetic means and the movable assembly is latched in each display position. A pair of switches are associated with and controlled by the movable assembly from a normally closed to an open condition. The switches may function variously to control associated equipment or switch the electromagnetic means so that drive energy is required only during transition of the indicator flag from one of the plurality of display positions to another, among others.