Abstract: The technology provides a waveguide display including an optical waveguide comprising a plurality of separated parallel optical substrates. The substrates are joined by an adhesive configured to have suspended therein a plurality of hard microspheres. The adhesive may be a pressure sensitive adhesive designed to have suspended therein the microspheres. Microspheres may have diameters on the order of a few microns up to 100 microns. The waveguide may be constructed of first and second optical substrates, and a pressure sensitive adhesive including embedded microspheres joining and spacing the substrates apart from each other. Additional substrates may be provided. The technology also provides a method of manufacturing a waveguide.

Abstract: A first surface of a heat source is spaced from a support by a first gap, in a thermal path from the first surface to the support. A second surface of the heat source, opposite to the first surface, is spaced by a second gap from a heat sink, in a thermal path from the second surface to the heat sink. The thermal path to the support provides a first thermal resistance, based on a gap spacing of the first gap and the thermal path to the heat sink provides a second thermal resistance, based on a gap spacing of the second gap.

Abstract: Examples disclosed herein relate to a continuous separator having perforations to help reduce or prevent wrinkling of the separator when producing curved electrode stacks. One example provides a battery comprising a plurality of discontinuous electrode layers, and a continuous separator separating the discontinuous electrode layers, the continuous separator having perforations extending at least partially through a depth of the continuous separator in a folded region of the continuous separator.

Abstract: A metal encased multilayer stack of graphite sheets used as a passive thermal conductor. In the stack, each sheet has a plane high thermal conductivity along a first axis and a plane of lower thermal conductivity along a second axis. The stack is created to have a three-dimensional shape including a length and a width, and the first axis is aligned parallel to said length, the multilayer stack having a height less than the width. A first metal structure surrounds the multilayer stack of graphite sheets, with the metal structure encasing the multilayer stack along the length, width and height of the multilayer stack.

Abstract: Devices with components mounted to a surface interior often encounter problems with generated heat, which is difficult to dissipate from a tightly packed and sealed device interior. Excessive heat may also distort the surface substrate material, which may become brittle from accumulated thermal stress and/or warp in a manner that displaces the position and/or orientation of the components. Presented herein are device manufacturing techniques in view of temperature considerations. Devices may comprise a device housing of a housing material that exhibits a substantially isotropic coefficient of thermal expansion (CTE) and/or thermal conductivity in various dimensions.

Abstract: A rolled-electrode battery cell includes multiple, stacked electrode rolls that are stacked along a stacking axis. Each of the electrode rolls has its electrode tabs bonded to an end of the electrodes, so that the electrode tabs extend from the ends of the electrodes along the winding direction of the electrodes. The stacked electrode rolls are bent around respective bending axes that are parallel to their winding axes, and perpendicular to the stacking axis and the winding direction of the electrodes.

Abstract: A jelly-roll type battery cell with a hollow core and no rigid outer casing is disclosed.

Abstract: A battery circuit includes a battery cell, monitoring circuitry configured to determine one or more parameters of the battery cell, a pouch enclosing the battery cell and the monitoring circuitry in a sealed, internal cavity, the pouch being configured to inhibit ingress of external fluid to the sealed, internal cavity, and an electrical connector exterior the pouch and electrically connected to the battery cell and the monitoring circuitry via one or more paths extending through the pouch and into the internal cavity.

Abstract: A flexible thermal conduit runs from a first housing portion of an electronic device to a second housing portion of the electronic device, to convey heat generated by an electronic component located in the first housing portion to a heat dissipation structure located in the second housing portion, where the second housing portion is flexibly coupled to the first housing portion, for example, by a hinge or other type of joint. The flexible conduit may include a plurality of layers of thin, flat thermally conductive material, which may be arranged to flex independently of each other in the region where the first and second housing portions are coupled.

Abstract: Examples are disclosed herein that relate to curved batteries. One example provides a battery comprising an anode arranged on an anode substrate, a cathode arranged on a cathode substrate, the anode substrate being curved at a first curvature and the cathode substrate being curved at a second curvature, and a separator between the anode and the cathode. A thickness of the anode substrate and a thickness of the cathode substrate are determined based on the curvature of the respective substrate, such that the one of the anode substrate and the cathode substrate with a larger curvature has a larger thickness.

Abstract: Disclosed are a stacked-electrode battery cell that has offset electrode-to-terminal bonds, and a method for manufacturing such a cell. The stacked-electrode battery cell can comprise an external connection terminal that includes a flat tab, and a plurality of flat electrodes stacked along a first coordinate axis and collectively forming at least a portion of an anode or a cathode of the battery cell. A first electrode of the plurality of flat electrodes is bonded to a first bond region of the tab and a second electrode of the plurality of flat electrodes is bonded to a second bond region of the tab, where the first bond region and the second bond region are non-overlapping along at least one coordinate axis perpendicular to the first coordinate axis.

Abstract: Examples disclosed herein relate to a continuous separator having perforations to help reduce or prevent wrinkling of the separator when producing curved electrode stacks. One example provides a battery comprising a plurality of discontinuous electrode layers, and a continuous separator separating the discontinuous electrode layers, the continuous separator having perforations extending at least partially through a depth of the continuous separator in a folded region of the continuous separator.

Abstract: Examples are disclosed herein that relate to curved batteries. One example provides a battery comprising an anode arranged on an anode substrate, a cathode arranged on a cathode substrate, the anode substrate being curved at a first curvature and the cathode substrate being curved at a second curvature, and a separator between the anode and the cathode. A thickness of the anode substrate and a thickness of the cathode substrate are determined based on the curvature of the respective substrate, such that the one of the anode substrate and the cathode substrate with a larger curvature has a larger thickness.

Abstract: An apparatus including a palette body, a plurality of heat distribution plates mounted on the body and positioned adjacent each other, a plurality of insulators positioned intermediate the adjacently positioned heat distribution plates, and a plurality of thermal camera calibration reference swatches including a near-ideal blackbody reference swatch, a diffuse reflective reference swatch, and a first material of the device under testing reference swatch, each reference swatch being mounted on a corresponding one of the heat distribution plates and thermally insulated from other reference swatches by the insulators.

Abstract: A head-up display system comprises a microprojector, first and second viewer optics, a redirection optic, and an electronic controller. Switchable electronically between first and second optical states, the redirection optic is configured to receive a display image from the microprojector, to convey the display image, in the first optical state, to the first viewer optic, and to convey the display image, in the second optical state, to the second viewer optic. The electronic controller is configured to, during a first interval, switch and maintain the redirection optic in the first optical state and cause the microprojector to form the display image based on first image data. The electronic controller is further configured to, during a second interval, switch and maintain the redirection optic in the second optical state and cause the microprojector to form the display image based on second image data.

Abstract: A passive heat pipe structure used in a wearable device includes a multilayer stack of graphite sheets, each sheet having a plane high thermal conductivity oriented along a first axis and a plane of lower thermal conductivity along a second axis different from the first axis. The stack has a three-dimensional shape including a length and a width where the length is longer than the width and the first axis aligns parallel to said length, the multilayer stack having a height less than the width. A plurality of bonding layers interspersed between each sheet of the multilayer stack, each bonding layer thermally coupling each sheet to a respective adjacent sheet. The bonding layers may comprise metal layers or adhesive layers.

Abstract: The techniques disclosed herein provide an enhanced mount for a camera module. The mount comprises at least a first side and a second side. The sides are formed to enable contact with at least a portion of the camera module. The sides are configured with openings to enable a fastening material, such as an adhesive, to secure the camera module to the mount. Openings within the mount enable the use of a fastening material to secure the camera module to at least one surface of the mount while allowing the camera module and at least one surface to maintain the mechanical contact. In some configurations, one or more openings are formed such that a contraction of the fastening material pulls the camera module toward at least one surface of the mount.

Abstract: A formable structure comprises a first material having a first level of viscosity and a second material having a second level of viscosity, wherein the second material is formed to hold at least a portion of the first material in a particular position or a particular shape. The first material can be configured to function as a thermal interface between two or more hardware components. The second material can be configured to have a higher viscosity than the first material. In one illustrative example, the second material can include a light-activated resin that is configured to harden when exposed to one or more treatments. By the use of the first material and second material, the techniques disclosed herein are adaptable to gaps having a wide range of sizes, which is difficult to do with traditional thermal interface materials. The second material can also function as an EMI shield.

Abstract: Examples are disclosed herein that relate to insert molding a heat pipe into a molded part. One example provides a method including inserting a heat pipe into a mold, injecting a material into the mold to at least partially surround the heat pipe and allowing the material to harden into a molded part that incorporates the heat pipe, and incorporating the molded part into a computing device.

Abstract: A flexible thermal conduit runs from a first housing portion of an electronic device to a second housing portion of the electronic device, to convey heat generated by an electronic component located in the first housing portion to a heat dissipation structure located in the second housing portion, where the second housing portion is flexibly coupled to the first housing portion, for example, by a hinge or other type of joint. The flexible conduit may include a plurality of layers of thin, flat thermally conductive material, which may be arranged to flex independently of each other in the region where the first and second housing portions are coupled.