Abstract: An optical device is provided. The optical device includes a first liquid crystal (“LC”) cell and a second LC cell stacked with the first LC cell. The first and second LC cells are configured to provide a phase retardation to a light transmitted therethrough. The optical device also includes at least one first compensation film disposed between the first LC cell and the second LC cell. The optical device also includes a second compensation film disposed at a first side of the first LC cell opposite to a second side of the first LC cell where the at least one first compensation film is disposed. The optical device also includes a third compensation film disposed at a first side of the second LC cell opposite to a second side of the second LC cell where the at least one first compensation film is disposed.

Abstract: A waveguide is provided for conveying image light. The waveguide includes an input port for receiving a first beam of image light carrying an image in a wavelength band. A first diffraction grating of the waveguide includes a plurality of volume Bragg gratings (VBGs) configured to expand the first beam along a first axis and to redirect the first beam towards a second diffraction grating of the waveguide. The second diffraction grating includes a plurality of VBGs configured to receive the first beam from the first diffraction grating and to out-couple different portions of the first wavelength band of the first beam along a second axis, thereby expanding the first beam along the second axis for observation of the image by a user.

Abstract: A social networking system identifies a user's relative preference for objects maintained by the social networking system, such as pages associated with movies, restaurants, businesses, or other content. To obtain the user's preferences, the system provides pairs, or groups, of objects to a user and prompts the user to indicate a preference between the objects in each pair. This obtained information about the user's relative preferences is stored in conjunction with the user's profile, which can then be used to select content subsequently presented to the user.

Abstract: An online system promotes physical store visits by presenting users with content items for a physical store location and subsequently logs visits of online system users to the physical store location to track performance of a campaign associated with the presented content item. The online system registers attention events associated with the presented content items presented to users on third party publishing sites via tracking pixels and registers attention events as store front visit conversion events if, within a predetermined period of time from a valid attention event, a user has subsequently gone in and visited the physical store front location.

Abstract: A user action associated with a content item performed by a target user is detected. Information describing online publishers that delivered the content item to the target user is retrieved. For each publisher, a likelihood that the user action would have occurred without the publisher's delivery of the content item to the target user is determined. An estimated increase in the likelihood that the user action occurred due to the publisher's delivery of the content item to the target user is determined. A baseline value indicating a likelihood that the user action would have occurred without delivery of the content item to the target user by any publishers is estimated based on attributes for the target user. A performance metric is determined for each publisher, wherein ratios of the metrics are scaled based on the baseline value and are related based on corresponding ratios of the estimated increases in likelihoods.

Abstract: Exemplary embodiments relate to improvements in the design of a messaging inbox. The inbox may display different units or “modules” for providing a user with quick access to different inbox functionalities. After a number of recent or unread messages are shown in the inbox's initial interface, the messages end and are replaced with modules. In some embodiments, promotional material may be integrated into a module, or may be integrated as a module. For example, a new message thread may be created to indicate a store in which a discount is offered. The message may appear in a module, or may stand in the place of a module. The promotional material may be selected based on proximity. The messaging service may differentiate between sponsored materials advertising a product or service, and purely beneficial materials such as coupons.

Abstract: Embodiments relate to forming an elastomeric interface layer (elayer) with a flap over multiple light emitting diode (LED) dies by forming materials across multiple LED dies and removing the materials between the LED dies. The formed flap of the elayer provides a large surface area for adhesion between each LED and a pick-up surface. For example, the flap may have a surface area that is larger than the light emitting surface of the LED die, or larger than the surface area of an elastomeric interface layer without the flap. As such, the elayer allows each LED to be picked up by a pick-up surface and placed onto a display substrate including control circuits for sub-pixels of an electronic display. In some embodiments, the LED dies are micro-LED (?LED) dies.

Abstract: An apparatus for efficiently driving visual displays via light-emitting devices may include (1) at least one light-emitting device, (2) a buck driver circuit electrically coupled to the light-emitting device, wherein the buck driver circuit includes an inductor, and (3) a boost circuit electrically coupled between the buck driver circuit and a power source, wherein the boost circuit includes an additional inductor. Various other apparatuses, systems, and methods are also disclosed.

Abstract: A compact light projection system is described for use in artificial reality systems, and which outputs patterned interferometric illumination that may be dynamically adjustable. The light projection systems are Integrated Circuits (IC)s, which are compact and easily added to other electronic devices in an artificial reality device. The IC illumination sources described herein provide flexibility by incorporating dynamically adjustable components as well as static components, such as phase delay devices, coupling controllers, switch-able light sources, and output gratings, which may each be adjusted to control the resulting pattern of interferometric illumination.

Abstract: A preprocessing module of a neural network has a first input and second input. The module generates multiple, different first latent vector representations of its first input, and multiple, different second latent vector representations of its second input. The module then models pairwise interactions between every unique pairwise combination of the first and second latent vector representations. The module then produces an intermediate output by combining the results of the modeled pairwise interactions.

Abstract: A microelectromechanical system (MEMS) coil assembly is presented herein. In some embodiments, the MEMS coil assembly includes a foldable substrate and a plurality of coil segments. Each coil segment includes a portion of the substrate, two conductors arranged on the portion of the substrate. The substrate can be folded to stack the coil segments on top of each other and to electrically connect first and second conductors of adjacent coil segments. In some other embodiments, the MEMS coil assembly includes a plurality of coil layers stacked onto each other. Each coil layer includes a substrate and a conductor to form a coil. The conductors of adjacent coil layers are connected through a via. The MEMS coil assembly can be arranged between a pair of magnets. An input signal can be applied to the MEMS coil assembly to cause the MEMS coil assembly to move orthogonally relative to the magnets.

Abstract: Systems, methods, and non-transitory computer-readable media can present landscape content through a display screen of the computing device, the landscape content being presented in a landscape viewing mode. A rotation of the display screen to transition to a portrait viewing mode can be determined. The landscape content can be scaled based on the rotation of the display screen, wherein the scaled landscape content is presented through the display screen.

Abstract: An online system receives a request from a posting user to post content describing a type of life event about the posting user to a user profile page of the posting user as well as a privacy setting for the content. The online system accesses a set of animations, in which each animation is associated with a type of life event and selects an animation that is associated with the type of life event about the posting user. Upon receiving a request from a viewing user to view the user profile page, the online system determines whether to include the selected animation in the user profile page based on the privacy setting and information describing a connection between the users. Based on the determination, the online system generates a user interface including at least the user profile page and sends the user interface for display to the viewing user.

Abstract: This disclosure describes efficient communication of surface texture data between system on a chip (SOC) integrated circuits. An example system includes a first integrated circuit and a second integrated circuit communicatively coupled to the first integrated circuit by a video communication interface. The first integrated generates a superframe in a video frame of the video communication interface for transmission to the second integrated circuit. The superframe includes multiple subframe payloads that carry surface texture data to be updated in the frame and corresponding subframe headers that include parameters of the subframe payloads. The second integrated circuit includes a direct access memory (DMA) controller. The DMA upon receipt of the superframe, writes the surface texture data within each of the subframe payloads directly to an allocated location in memory based on the parameters included in the corresponding one of the subframe headers.

Abstract: Disclosed herein are techniques for wafer-to-wafer bonding for manufacturing light emitting diodes (LEDs). In some embodiments, a method of manufacturing LEDs includes modifying a p-type layer of a semiconductor material to form a plurality of alternating high resistivity areas and low resistivity areas, wherein the low resistivity areas correspond to light emitters; bonding a base wafer to a first surface of the p-type layer; removing a substrate from a second surface of the semiconductor material, wherein the second surface of the semiconductor material is opposite to the first surface of the p-type layer; and patterning a trench between each adjacent pair of the light emitters.

Abstract: A fluidic logic-gate device may include inlet ports, input ports, an output port, fluid channels each configured to route fluid from one of the inlet ports to the output port, and pistons that each include (1) a restricting gate transmission element configured to block, when the piston is in a first blocking position and unblock, when the piston is in a second blocking position, one of fluid channels, (2) a first controlling gate transmission element configured to interface with a first control pressure that, when applied to the first controlling gate transmission element, forces the piston towards the first blocking position, and (3) a second controlling gate transmission element configured to interface with a second control pressure that, when applied to the second controlling gate transmission element, forces the piston towards the second blocking position. Various other related devices and systems are also disclosed.

Abstract: In one embodiment, a method includes accessing a social graph maintained by an online social network, the social graph including nodes and edges connecting the nodes, each edge representing a relationship between two of the nodes. The method also includes receiving an indication that a first user of the online social network has interacted with a content object posted by a second user of the online social network, wherein the content object is associated with a first entity. The method also includes accessing user data associated with the first user and entity data associated with the first entity. In response to receiving the indication, the method identifies one or more prompts based on the user data and the entity data. Finally, at least one of the prompts is sent to a client device of the first user for display.

Abstract: This disclosure describes an artificial reality system that presents artificial reality content in the context of a physical environment that includes a mirror or other reflective surface. In one example, this disclosure describes a method that includes capturing capture data representative of a physical environment, wherein the physical environment includes a reflective surface and a plurality of objects, determining a pose of the HMD, determining a map of the physical environment, wherein the map includes position information about the reflective surface and position information about each of the plurality of physical objects in the physical environment, identifying a visible object from among the plurality of physical objects, and generating artificial reality content associated with the visible object.

Abstract: A display device includes a display panel having a first emission region and a second emission region that is distinct from and mutually exclusive to the first emission region and surrounds the first emission region. The display device includes a first plurality of light emitters arranged in the first emission region, a plurality of activation lines for the first emission region, a second plurality of light emitters arranged in the second emission region, and a plurality of activation lines for the second emission region. A single activation line of the plurality of activation lines for the first emission region is electrically coupled with a first number of light emitters in the first emission region and a single activation line of the plurality of activation lines for the second emission region is electrically coupled with a second number, distinct from the first number, of light emitters in the second emission region.