Abstract: An optical encoder having diffuser members, and methods for detecting the rotational movement of the cylinder of the optical encoder are disclosed. The optical encoder may include a rotatable cylinder configured to reflect light. The rotatable cylinder may include an encoding pattern of alternating reflective stripes having distinct light-reflective properties. The optical encoder may also include a light source positioned adjacent the rotatable cylinder, and an array of optical sensors positioned adjacent the rotatable cylinder. The array of optical sensors may receive the reflected light from the rotatable cylinder. The optical encoder may include a diffuser member positioned on the rotatable cylinder, the light source, and the array of optical sensors.

Abstract: Embodiments of the present disclosure provide a method and system for dynamically controlling a current that is applied to a light source of an optical encoder.

Abstract: A directory operational block data structure is provided by a processor within a memory. The directory operational block data structure allows configuration of a directory of a file system, at an operating-system level, with at least one executable program to be executed in response to configurable operating-system level directory events associated with the directory. A first program is attached within the directory operational block data structure to execute in response to a specified directory event. The attached first program is executed at the operating-system level in response to detection of the specified directory event.

Abstract: A directory operational block data structure is provided by a processor within a memory. The directory operational block data structure allows configuration of a directory of a file system, at an operating-system level, with at least one executable program to be executed in response to configurable operating-system level directory events associated with the directory. A first program is attached within the directory operational block data structure to execute in response to a specified directory event. The attached first program is executed at the operating-system level in response to detection of the specified directory event.

Abstract: An electronic device is provided, with a display and a display-integrated light sensor. The display includes a transparent cover layer, light-generating layers, and a touch-sensitive layer. The display-integrated light sensor is interposed between the transparent cover layer and a display layer such as the touch-sensitive layer or a thin-film transistor layer of the light-generating layers. The light-generating layers include a layer of organic light-emitting material. The display-integrated light sensor can be implemented as an ambient light sensor or a proximity sensor. The display-integrated, light sensor may be a packaged light sensor that is integrated into the display layers of the display or may be formed from light-sensor components formed directly on a display circuitry layer such as the touch-sensitive layer or the thin-film transistor layer.

Abstract: An electronic device may be provided with a touch screen display that is controlled based on information from a proximity sensor. The proximity sensor may have a light source that emits infrared light and a light detector that detects reflected infrared light. When the electronic device is in the vicinity of a user's head, the proximity sensor may produce data indicative of the presence of the user's head. Variations in proximity sensor output due to user hair color and smudges on the proximity sensor can be accommodated by using an electrical sensing mechanism in addition to the light sensing mechanism. The proximity sensor may include a pair of capacitive electrodes for generating an electric field in the vicinity of the device. The presence of a user's head can sufficiently disturb the electric field so as to produce data indicative of the presence of the user's head.

Abstract: An electronic device may be provided with a touch screen display that is controlled based on information from a proximity sensor attached underneath a display layer. The proximity sensor may have a light source that emits infrared light and a light detector that detects reflected infrared light. When the electronic device is in the vicinity of a user's head, the proximity sensor may produce data indicative of the presence of the user's head. Variations in proximity sensor output due to smudges on the proximity sensor can be detected by providing the proximity sensor with an additional light source. The additional light source may be used to inject light into the display layer. The injected light may be guided within the display layer by total internal reflection. In the presence of smudge, the internally reflecting light may deviate from its normal propagation path.

Abstract: An electronic device may be provided with a touch screen display that is controlled based on information from a proximity sensor. The proximity sensor may have a light source that emits infrared light and a light detector that detects reflected infrared light. When the electronic device is in the vicinity of a user's head, the proximity sensor may produce data indicative of the presence of the user's head. Variations in proximity sensor output due to user hair color and smudges on the proximity sensor can be accommodated by using an electrical sensing mechanism in addition to the light sensing mechanism. The proximity sensor may include a pair of capacitive electrodes for generating an electric field in the vicinity of the device. The presence of a user's head can sufficiently disturb the electric field so as to produce data indicative of the presence of the user's head.

Abstract: An electronic device is provided with a display and a display-integrated light sensor. The display includes a transparent cover layer, light-generating layers, and a touch-sensitive layer. The display-integrated light sensor is interposed between the transparent cover layer and a display layer such as the touch-sensitive layer or a thin-film transistor layer of the light-generating layers. The light-generating layers include a layer of organic light-emitting material. The display-integrated light sensor can be implemented as an ambient light sensor or a proximity sensor. The display-integrated light sensor may be a packaged light sensor that is integrated into the display layers of the display or may be formed from light-sensor components formed directly on a display circuitry layer such as the touch-sensitive layer or the thin-film transistor layer.

Abstract: An electronic device may be provided that has a display. The display may produce light using a backlight unit or using an array of light-emitting display pixels. An ambient light sensor may be mounted under an active area of the display to measure ambient light that is transmitted through the display. The display may be periodically disabled to prevent the display from producing light that interferes with the ambient light sensor. Display pixels may be coupled to a common cathode switch that can be periodically opened or the backlight in a display with a backlight can be periodically turned off. Control circuitry for periodically disabling the display while enabling the ambient light sensor may be implemented using a display driver integrated circuit mounted to a display.

Abstract: A portable electronic device including a proximity sensing device having an emitter and a detector. The electronic device further including a housing for containing the proximity sensing device which includes an optical interface forming a face of the housing through which radiation between the emitter and the detector pass. The optical interface may include an oleophobic coating which is selectively modified such that optical interference from an optical interface near-field object on the proximity sensing device is reduced without reducing a sensitivity of the proximity sensing device to a target near-field object.

Abstract: An electronic device may be provided with a touch screen display that is controlled based on information from a proximity sensor. The proximity sensor may have a light source that emits infrared light and a light detector that detects reflected infrared light. When the electronic device is in the vicinity of a user's head, the proximity sensor may produce data indicative of the presence of the user's head. Variations in proximity sensor output due to user hair color and smudges on the proximity sensor can be accommodated by using an electrical sensing mechanism in addition to the light sensing mechanism. The proximity sensor may include a pair of capacitive electrodes for generating an electric field in the vicinity of the device. The presence of a user's head can sufficiently disturb the electric field so as to produce data indicative of the presence of the user's head.

Abstract: An electronic device may be provided with a touch screen display that is controlled based on information from a proximity sensor attached underneath a display layer. The proximity sensor may have a light source that emits infrared light and a light detector that detects reflected infrared light. When the electronic device is in the vicinity of a user's head, the proximity sensor may produce data indicative of the presence of the user's head. Variations in proximity sensor output due to smudges on the proximity sensor can be detected by providing the proximity sensor with an additional light source. The additional light source may be used to inject light into the display layer. The injected light may be guided within the display layer by total internal reflection. In the presence of smudge, the internally reflecting light may deviate from its normal propagation path.

Abstract: A directory operational block data structure is provided by a processor within a memory. The directory operational block data structure allows configuration of a directory of a file system, at an operating-system level, with at least one executable program to be executed in response to configurable operating-system level directory events associated with the directory. A first program is attached within the directory operational block data structure to execute in response to a specified directory event. The attached first program is executed at the operating-system level in response to detection of the specified directory event.

Abstract: A directory operational block data structure is provided by a processor within a memory. The directory operational block data structure allows configuration of a directory of a file system, at an operating-system level, with at least one executable program to be executed in response to configurable operating-system level directory events associated with the directory. A first program is attached within the directory operational block data structure to execute in response to a specified directory event. The attached first program is executed at the operating-system level in response to detection of the specified directory event.

Abstract: An electronic device is provided with a display and a display-integrated light sensor. The display includes a transparent cover layer, light-generating layers, and a touch-sensitive layer. The display-integrated light sensor is interposed between the transparent cover layer and a display layer such as the touch-sensitive layer or a thin-film transistor layer of the light-generating layers. The light-generating layers include a layer of organic light-emitting material. The display-integrated light sensor can be implemented as an ambient light sensor or a proximity sensor. The display-integrated light sensor may be a packaged light sensor that is integrated into the display layers of the display or may be formed from light-sensor components formed directly on a display circuitry layer such as the touch-sensitive layer or the thin-film transistor layer.

Abstract: An electronic device may be provided that has a display. The display may produce light using a backlight unit or using an array of light-emitting display pixels. An ambient light sensor may be mounted under an active area of the display to measure ambient light that is transmitted through the display. The display may be periodically disabled to prevent the display from producing light that interferes with the ambient light sensor. Display pixels may be coupled to a common cathode switch that can be periodically opened or the backlight in a display with a backlight can be periodically turned off. Control circuitry for periodically disabling the display while enabling the ambient light sensor may be implemented using a display driver integrated circuit mounted to a display.