Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may attempt to establish a data session with a base station. The UE may transmit one or more session request messages including one or more route selection descriptors (RSDs) to the base station, and the UE may determine a successful RSD that may be compatible with the network based on a session accept message received from the base station. The UE may store the successful RSD at a location in memory for use in future session establishment procedures. For example, the UE may go out of service, and may re-acquire service with the same network. In such cases, the UE may transmit a session request message including the previously-accepted RSD to re-establish a data session with the base station.

Abstract: In general, aspects disclosed herein provide techniques for processing video data. Certain aspects provide a method for processing video data comprising a plurality of frames for display on a display as discussed herein. The method includes determining a sampling rate (N) based on a frame rate used for displaying the video data on the display. The sampling rate N is greater than 1. The method further includes, for every N frames of the plurality of frames, processing one or more statistics associated with a frame determine one or more display settings. The method further includes outputting to the display the corresponding N frames of the plurality of frames using the one or more display settings.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for generating, in a display panel, a virtual mask layer around a cutout region for a front camera. The front camera may be positioned under the display panel and receive light through the cutout region. The mask layer may hide defects of the cutout region that does not have functional pixels. The disclosed techniques may improve aesthetic appearance of displays having punch-hole cameras with reduced hole sizes and increased production quality conformance rate.

Abstract: In some aspects, the present disclosure provides a method for high dynamic range (HDR) video rotation. The method includes receiving, by a display processor, an indication that a frame rotation animation process for video playback has been initiated, the display processor comprising a display processor pipeline. The method also includes determining whether the video playback is an HDR format or another format. In response to the determination and receiving the indication: bypassing a loading of the frame rotation animation into a first portion of the display processor pipeline, and loading the frame rotation animation into a second portion of the display processor pipeline if the video playback is in an HDR format.

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for reducing gamut mapping luminance loss. A gain value of at least one primary color may be reduced in a native color gamut based on an analog technique (e.g., using a DDIC in a display panel) to provide a reduced color gamut that is smaller than the native color gamut. The reduced color gamut may have a same luminance as the native color gamut. One or more colors included in the native color gamut may be mapped via a digital technique (e.g., using a DPU or other processor) to the reduced color gamut. The mapping may be configured to provide a threshold level of color accuracy in the reduced color gamut.

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for reducing a DPU transfer time to compensate for a delayed GPU render time. After completion of rendering a second frame that follows a first frame, a frame processor determines whether the first frame is currently transferring to a display panel or has already been transferred to the display panel. At least one clock is used with a first set of clock speeds when the first frame is determined to be currently transferring and used with a second set of clock speeds when the first frame is determined to have already been transferred, the second set of clock speeds being faster than the first set of clock speeds. After completion of the transfer of the first frame, the second frame is transferred based on the set of clock speeds.

Abstract: This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for delaying a DSI clock change until there is no new frame update, so that a smoother user interface may be perceived. With more specificity, an apparatus may receive a request to change a speed of a clock for displaying a frame. After receiving the request, the apparatus may determine whether two consecutive frames (e.g., a current frame and a prior frame) have a different layer configuration. If so, the request to change the speed of the clock may be delayed until a new set of two consecutive frames are identified with a same layer configuration or until the delay period reaches a timeout limit.

Abstract: Aspects of the present disclosure can receive a hardware Vsync signal from a display, generate a hardware timestamp signal based on the hardware Vsync signal, determine an error for a pulse in the hardware timestamp signal, determine whether the error for the pulse is over a threshold, synchronize a software Vsync signal based on the hardware timestamp signal, wherein the pulse of the hardware timestamp signal is ignored in synchronization based on whether the error is above the threshold, and control rendering and transmission of a frame to the display based on the synchronized software Vsync signal.

Abstract: The present disclosure relates to methods and apparatus for display processing. Aspects of the present disclosure can communicate an image to multiple display panels, where the multiple display panels include a first display panel and a second display panel. Further, aspects of the present disclosure can divide the image between the first display panel and the second display panel. Additionally, aspects of the present disclosure can scale at least one of a first portion of the image or a second portion of the image to at least one of the first display panel and the second display panel. Aspects of the present disclosure can also display at least one of the scaled first portion of the image or the scaled second portion of the image on at least one of the first display panel or the second display panel.

Abstract: The present disclosure relates to methods and apparatus for display processing. For example, disclosed techniques facilitate region of interest tracking for in-motion frames. Aspects of the present disclosure can identify a layer of interest of a plurality of layers associated with a frame. Aspects of the present disclosure can also determine coordinates for a region of interest based on characteristics associated with the identified layer of interest. Further, aspects of the present disclosure can perform display processing on the region of interest of the frame based on the coordinates for the region of interest.

Abstract: Method and apparatus for selecting a gamma curve used by a display driver circuit for converting code words provided by a display processing unit to brightness levels based on an operating mode of the computing device. For example, the display processing unit provides code words to the display driver circuit for driving output at a display. Further, the display driver circuit converts the provided code words to analog signal for driving output at the display based on the selected gamma curve.

Abstract: The present invention relates to a multi-carrier resource allocation method based on a wireless-powered backscatter communication network. The method comprises following steps: S1.

Abstract: The present disclosure relates to methods and apparatus for display processing. For example, disclosed techniques facilitate regional processing of images for under-display device displays. Aspects of the present disclosure can identify a subsection of a set of frame layers, the identified subsection corresponding to a lower pixel density region, relative to at least one other region, of a display. Aspects of the present disclosure can also blend first pixel data for each frame layer corresponding to the identified subsection to generate second pixel data. Further, aspects of the present disclosure can populate a buffer layer based on the second pixel data. Additionally, aspects of the present disclosure can blend pixel data from the set of frame layers and the buffer layers to generate a blended image. Aspects of the present disclosure can also transmit the blended image for presentment via the display.

Abstract: A device for obtaining water from air on an island includes: a concentrated solution air water obtaining system, a solar collector, a dilute solution dehydration system, a heat pump system, a solution heating system, and a water purification system. Humid air is introduced into the concentrated solution air water obtaining system, which performs a heat and mass transfer into a dilute solution and relatively low-temperature dry air. This air is used as interior fresh air. The diluted solution is heated by the solar collector, delivered to the dilute solution dehydration system, and sent to the solution heating system for heating and evaporating into water vapor. The water purification system cools, purifies, filters and stores the water vapor. At the same time, the heat pump system introduces heated humid air into the dilute solution dehydration system to recover heat contained in the heated humid air, and to extract water.

Abstract: A user may select an image of a scene captured by a mobile device as a reference image. The mobile device may present the reference image as a translucent background image on a display of the mobile device, and may display a preview image of the scene over the translucent background image so that the user can adjust a position and/or an orientation of the mobile device until the preview image is aligned with the translucent background image. In some aspects, the mobile device may determine a similarity value between the preview image and the translucent background image, and may present the similarity value on the display.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for generating a mask layer for a display of a computing device. For example, a method includes retrieving, from a non-volatile memory of a computing device, region information indicative of dimensions of a region of a display not having functional pixels and indicative of a position of the region on the display. The method further includes generating a mask layer having a size, shape, and position based on the region information. The method further includes composing an image based on the mask layer and one or more layers, the mask layer preventing display of any portion of the one or more layers that overlap with the mask layer. The method further includes outputting the image on the display.

Abstract: A device for obtaining water from air on an island includes: a concentrated solution air water obtaining system, a solar collector, a dilute solution dehydration system, a heat pump system, a solution heating system, and a water purification system. Humid air is introduced into the concentrated solution air water obtaining system, which performs a heat and mass transfer into a dilute solution and relatively low-temperature dry air. This air is used as interior fresh air. The diluted solution is heated by the solar collector, delivered to the dilute solution dehydration system, and sent to the solution heating system for heating and evaporating into water vapor. The water purification system cools, purifies, filters and stores the water vapor. At the same time, the heat pump system introduces heated humid air into the dilute solution dehydration system to recover heat contained in the heated humid air, and to extract water.

Abstract: The present invention relates a method of preparing methane using ?-valerolactone. A solution of ?-valerolactone is mixed with a triruthenium dodecacarbonyl catalyst, for a reaction at 150° C.-250° C. for 1 to 12 hours, and then subjected to cooling; wherein a mass ratio of ?-valerolactone to the triruthenium dodecacarbonyl catalyst is between 1:2 and 1:50; and the solution of ?-valerolactone has a mass concentration of 50 g/L-300 g/L. In the present invention, ?-valerolactone is converted into methane rapidly by a one-step catalysis deoxygenation using a triruthenium dodecacarbonyl catalyst. The preparation method provided by the present invention can realize a complete conversion of ?-valerolactone, and the methane gas has a yield up to 45 wt %. Besides, such method has characteristics of short reaction time, high yield of methane, easy collection, simple process and convenient operation, and it has industrialized application prospect.

Abstract: Disclosed is a method of adaptively adjusting lift and drag on an airfoil-shaped sail. The method includes: (1) mounting at least one airfoil-shaped sail body having an airfoil-shaped cross section; (2) defining a Y-shaped air jet channel in the airfoil-shaped sail body; (3) arranging a flow regulating gate in the Y-shaped air jet channel; (4) adjusting the flow regulating gate to automatically adjust the gate opening extent and the cross section opening or closing extent in response to an oncoming flow with a varying direction and speed, to regulate the airflow within the air jet channel and accordingly change the angle of attack, so that the lift and drag on the sail body can be automatically adjusted as the wind speed changes. Further disclosed are an airfoil-shaped sail implementing the above method as well as a vertical-axis wind turbine employing the airfoil-shaped sail.

Abstract: The present invention relates to a method of preparing n-butyric acid by using poly-3-hydroxybutyrate. The method comprises following steps: placing poly-3-hydroxybutyrate in a closure means, passing hydrogen into the closure means to eliminate air after making an initial hydrogen pressure be 2 to 6 MPa, carrying out an agitation at 190 to 240° C. for reaction for 6 to 36 hours to obtain n-butyric acid. The preparation method provided by the present invention does not require a catalyst or a reaction solvent, and converts poly-3-hydroxybutyrate into n-butyric acid by a one-step reaction under a hydrogen atmosphere. The conversion rate of poly-3-hydroxybutyrate is 100%, the yield of n-butyric acid reaches up to 97%, the purity of n-butyric acid in all obtained liquid products reaches up to 98%, and no additional subsequent separation process is needed to the target product n-butyric acid.