Abstract: An electronic device includes a shared epitaxial structure, an array of photodiodes formed in the shared epitaxial structure, and a readout circuit. The array of photodiodes is disposed between a first axis and a second axis, with the second axis orthogonal to the first axis. The array of photodiodes has an absence of guard structures between adjacent photodiodes. The readout circuit is electrically connected to the array of photodiodes and operable to read out values for different photodiodes or different subsets of photodiodes in the array of photodiodes.

Abstract: An electronic device may have a sensor and may have a radio-frequency signal transmitter. The sensor may be vulnerable to electromagnetic interference (EMI) from the radio-frequency (RF) signals. Therefore, circuitry in the device may determine whether measurements from the sensor have been impacted by EMI. To make this determination, a digital filter may be used. In particular, the digital filter may be a digital persistence filter that generates a signal if the sensor measurement is high for a time that corresponds with the known emission time of the RF signals. Alternatively, the digital filter may receive the sensor measurements in the digital domain and compare the sensor measurements to time-delayed sensor measurements to determine whether the sensor measurements have been impacted by EMI. Control circuitry may discard any of the sensor measurements, or measurements from one or more other sensors, in response to the sensor measurements being impacted by EMI.

Abstract: An electronic device may have a sensor to measure ambient flicker. The sensor may be a sigma-delta converter. The flicker may be calculated based on the voltage output of the sigma-delta converter and the number of times the sigma-delta converter is triggered during a predetermined period, thereby reducing the voltage output. In particular, a fast Fourier transform (FFT) may be used on these values to determine the flicker. If desired, filtering and/or non-uniform sampling may be incorporated to avoid aliasing. Additionally or alternatively, a Lomb-Scargle spectral analysis may be used to prevent the attenuation of the measured flicker signals. As an alternative to using a sigma-delta converter to determine ambient flicker, a folding capacitive transimpedance amplifier (C-TIA) circuit or a circuit with an analog to digital converter and digital filter may be used to measure the ambient flicker.

Abstract: Ambient light sensor modules may be formed using a wafer-level process in which a filter and a diffuser are stacked on a silicon substrate or a combination substrate that includes multiple photosensors. The stack may be diced, filled with opaque material, and diced again to form multiple ambient light sensor modules. The resulting modules may include a silicon substrate with a photosensor and through-silicon vias, a filter on the silicon substrate, and a diffuser coupled to the filter. There may be an air gap between a portion of the diffuser and the photosensor. The air gap may be formed from a recess in the diffuser or from spacers between the filter and the diffuser. Alternatively, the diffuser may be applied as a coating on the filter. By forming the ambient light sensor modules at the wafer level, the modules may have smaller footprints and/or volumes.

Abstract: A method of operating a laser includes generating a first signal having a first frequency, and generating a second signal having a second frequency. The first frequency varies in accord with an amplitude of a drive current provided to a laser. The method further includes incrementing or decrementing a count responsive to a relationship between the first frequency and the second frequency; determining the count satisfies a threshold count; and modifying operation of the laser when the count satisfies the threshold count.

Abstract: Systems and methods for managing power consumption of device subsystems include a device which maintains one or more constraint metric tables for applications executable on the device. Each of the one or more constraint metric tables may specify respective power levels for subsystems of the device according to a respective application or an application type of the respective application. The device may determine to operate the device at a reduced power level for a first application, based on a condition for the device satisfying at least one of a thermal threshold criterion or a power threshold criteria when the device operates at full power level. The device may apply a constraint metric responsive to determining to operate at the reduced power level, to cause a subset of the plurality of subsystems to adjust a power consumption level according to a first constraint metric table corresponding to the first application.

Abstract: Disclosed herein are related to a first device to communicate with an access point and a second device. In one aspect, the first device communicates with the access point during the first time interval through a first wireless communication. In one aspect, the first device prevents communication with the access point during the second time interval. In one aspect, the first device communicates, as a soft access point, with a second device during the third time interval within the second time interval through a second wireless communication, the third time interval shorter than the second time interval.

Abstract: Disclosed herein are related to resuming a wireless communication between a first device and a second device. In one aspect, the first deice enters a wake up mode from a sleep mode. In one aspect, the first device obtains, in response to entering the wake up mode, stored information indicating a wireless channel previously used to communicate with a second device, to monitor for a beacon frame from the second device. In one aspect, the first device receives the beacon frame from the second device, according to the stored information. In one aspect, the first device transmits to the second device, an association frame in response to receiving the beacon frame.

Abstract: Systems and methods for managing power consumption of device subsystems include a device which maintains one or more constraint metric tables for applications executable on the device. Each of the one or more constraint metric tables may specify respective power levels for subsystems of the device according to a respective application or an application type of the respective application. The device may determine to operate the device at a reduced power level for a first application, based on a condition for the device satisfying at least one of a thermal threshold criteria or a power threshold criteria when the device operates at full power level. The device may apply a constraint metric responsive to determining to operate at the reduced power level, to cause a subset of the plurality of subsystems to adjust a power consumption level according to a first constraint metric table corresponding to the first application.

Abstract: An electronic device can include housing with first and second housing portions configured to rotate relative to one another about a hinge, a hinge angle encoder that rotates with the hinge, an emitter that emits light towards the hinge angle encoder, and a sensor die that receives light reflecting back from the hinge angle encoder. The hinge angle encoder may include an absorptive polarizing filter layer and a reflective diffuser layer. A pixelated polarizer may be formed overlapping an array of photodetectors in the sensor die. The electronic device may include processing circuitry configured to compute a hinge angle by which the first and second housing portions are rotated based on one or more intensity values acquired using the array of photodetectors.

Abstract: The invention relates to a pneumatic vehicle tire, in particular a utility vehicle tire, having a tread with a circumferential groove, and having a carcass with a carcass ply which has, in a cross section of the tire, a carcass ply line running through the central points of the strength members of the carcass ply, wherein said cross section is the cross section in the circumferential direction U that the tire would have in the new state if it were mounted on a standard wheel rim conforming to E.T.R.T.O. without filling pressure.

Abstract: Disclosed herein are related to resuming a wireless communication between a first device and a second device. In one aspect, the first deice enters a wake up mode from a sleep mode. In one aspect, the first device obtains, in response to entering the wake up mode, stored information indicating a wireless channel previously used to communicate with a second device, to monitor for a beacon frame from the second device. In one aspect, the first device receives the beacon frame from the second device, according to the stored information. In one aspect, the first device transmits to the second device, an association frame in response to receiving the beacon frame.

Abstract: An electronic device may be attached to an external item. The electronic device may include an optical identification sensor configured to sense a color-encoded tag in the external item when the item is attached to the device. The optical identification sensor may include a board layer, a protective filter layer, wall structures for supporting the protective filter layer on the board layer, a linear array of photodetectors disposed between the board layer and the protective filter layer, a field-of-view restriction filter interposed between the photodetectors and the protective filter layer, and a light source having multiple emitters for illuminating the color-encoded tag. The emitters may be activated sequentially to produce multiple images that are combined to reconstruct an accurate reading of the color-encoded tag, which can then be used to identify the type of external item currently attached to the electronic device.

Abstract: Disclosed herein are aspects related to a device that can include a wireless communication interface and one or more processors. The wireless communication interface can establish at least one of (i) a first link with a first remote device or (ii) a second link with a second remote device. The one or more processors can control operation of the at least one wireless communication interface according to: (i) temperature data of at least one of the device or first remote device; and (ii) at least one of (a) power data of at least one of the first device or the second device or (b) at least one of capacity or throughput of at least one of the first link or the second link.

Abstract: A method by a rendering device includes receiving a request to render multiple surfaces corresponding to multiple virtual objects to be concurrently displayed on an augmented-reality (AR) headset. The method further includes that the AR headset is connected to the rendering device via a wireless link. In response to a determination that a network quality of the wireless link is below a threshold condition, the method further includes selecting a first subset of the multiple surfaces that are higher priority than a second subset of the plurality of surfaces. The method includes transmitting the fist subset of multiple surfaces to the AR headset for display and transmitting the second subset of multiple surfaces to the AR headset for display after transmitting the first subset. This method includes rendering the surfaces in accordance with a set of rendering parameters so as to satisfy one or more network constraints.

Abstract: Disclosed herein are related to a first device to communicate with a second device and a third device. In one aspect, the first device determines a first time interval to receive a first beacon frame from the second device. In one aspect, the first device determines, according to the first time interval, a second time interval for the first device to transmit a second beacon frame to a third device. In one aspect, the first device determines a third time interval to operate the first device in a wake up mode. The third time interval may encompass the first time interval and the second time interval. In one aspect, the first device receives the first beacon frame from the second device during the first time interval, and transmits the second beacon frame to the third device during the second time interval.

Abstract: An electronic device may have an ambient light sensor for gathering ambient light measurements. The ambient light sensor may include multiple channels for measuring different wavelengths of ambient light. An additional, modified, channel may be formed in the ambient light sensor to measure radio-frequency signals that may interfere with the ambient light measurements due to electromagnetic interference. Alternatively, circuitry separate from the ambient light sensor, such as an antenna, may measure the radio-frequency signals. If the radio-frequency signals exceed a threshold, the ambient light sensor measurements taken in the presence of the radio-frequency signals may be discarded or corrected. If the radio-frequency signals do not exceed a threshold, the ambient light sensor measurements may be kept. Therefore, the ambient light measurements that are kept and relied upon by the electronic device may be free from electromagnetic interference.

Abstract: Disclosed herein a system, a method and a device for selecting between a primary link and a secondary link for AR/VR applications. A console can provide a VR/AR session to a user through a head wearable display. The console can determine that a first measurement of a primary link between the console and a head wearable display is less than a first threshold. The first measurement can include a quality metric of the primary link. The console can activate a secondary link between the console and the head wearable display. The console can determine whether a second measurement of the primary link between the console and the head wearable display is less than a second threshold. The console can transition when the second measurement is less than the second threshold, traffic on the primary link to the activated secondary link.