Abstract: A head-mounted device may include a camera that captures a live video feed of an environment. A display in the head-mounted device may display passthrough display content that includes the live video feed. Control circuitry may dynamically adjust a maximum allowable brightness for the passthrough display content during operation of the head-mounted device. Upon an initial donning of the head-mounted device, the passthrough display content may be permitted to use most or all of the achievable brightness range of the display. After a given time period, the user may be adapted to the brightness range of the display and the maximum allowable brightness for the passthrough display content may be reduced to allow additional headroom for rendered display content. The control circuitry may continue to adjust tone mappings for passthrough display content and rendered display content based on whether the display content favors real-world content or virtual content.

Abstract: An electronic device may be provided with a display. The display may be configured to display standard dynamic range image content and high dynamic range image content at the same time. The control circuitry may dynamically adjust an amount of headroom for the high dynamic range image content to avoid washing out the standard dynamic range image content. For example, the control circuitry may reduce the amount of headroom available for high dynamic range image content with high average pixel luminance levels and low screen coverage. The headroom may be increased as the average pixel luminance levels decrease and/or as screen coverage increases. Different high dynamic range images that are displayed at the same time may be assigned different amounts of headroom (e.g., different peak brightness levels) based on average pixel luminance values, screen coverage, whether or not the content is within an active window on the display, etc.

Abstract: An electronic device may be provided with a display. The display may be configured to display standard dynamic range image content and high dynamic range image content at the same time. The control circuitry may dynamically adjust an amount of headroom for the high dynamic range image content to avoid washing out the standard dynamic range image content. For example, the control circuitry may reduce the amount of headroom available for high dynamic range image content with high average pixel luminance levels and low screen coverage. The headroom may be increased as the average pixel luminance levels decrease and/or as screen coverage increases. Different high dynamic range images that are displayed at the same time may be assigned different amounts of headroom (e.g., different peak brightness levels) based on average pixel luminance values, screen coverage, whether or not the content is within an active window on the display, etc.

Abstract: A head-mounted device may include a camera that captures a live video feed of an environment. A display in the head-mounted device may display passthrough display content that includes the live video feed. Control circuitry may dynamically adjust a maximum allowable brightness for the passthrough display content during operation of the head-mounted device. Upon an initial donning of the head-mounted device, the passthrough display content may be permitted to use most or all of the achievable brightness range of the display. After a given time period, the user may be adapted to the brightness range of the display and the maximum allowable brightness for the passthrough display content may be reduced to allow additional headroom for rendered display content. The control circuitry may continue to adjust tone mappings for passthrough display content and rendered display content based on whether the display content favors real-world content or virtual content.

Abstract: The present disclosure generally relates to user interfaces for displaying representations of media (an image, video).

Abstract: A head-mounted device may include a camera that captures a live video feed of an environment. A display in the head-mounted device may display passthrough display content that includes the live video feed. Control circuitry may dynamically adjust a maximum allowable brightness for the passthrough display content during operation of the head-mounted device. Upon an initial donning of the head-mounted device, the passthrough display content may be permitted to use most or all of the achievable brightness range of the display. After a given time period, the user may be adapted to the brightness range of the display and the maximum allowable brightness for the passthrough display content may be reduced to allow additional headroom for rendered display content. The control circuitry may continue to adjust tone mappings for passthrough display content and rendered display content based on whether the display content favors real-world content or virtual content.

Abstract: A head-mounted device may include a camera that captures a live video feed of an environment. A display in the head-mounted device may display passthrough display content that includes the live video feed. Control circuitry may dynamically adjust a maximum allowable brightness for the passthrough display content during operation of the head-mounted device. Upon an initial donning of the head-mounted device, the passthrough display content may be permitted to use most or all of the achievable brightness range of the display. After a given time period, the user may be adapted to the brightness range of the display and the maximum allowable brightness for the passthrough display content may be reduced to allow additional headroom for rendered display content. The control circuitry may continue to adjust tone mappings for passthrough display content and rendered display content based on whether the display content favors real-world content or virtual content.

Abstract: The present disclosure generally relates to user interfaces for displaying representations of media (an image, video).

Abstract: Systems, methods, and devices are provided to reduce a likelihood of image burn-in on an electronic display. Such an electronic device may include image processing circuitry and an electronic display. The image processing circuitry may receive image data and analyze the image data for risk of image burn-in and, based at least in part on the analysis of the image data, reduce a risk of image burn-in at least in part by reducing a local maximum pixel luminance value in at least one of a plurality of regions of the image data over time or by reducing a dynamic range headroom of the image data. The electronic display may display the image data with a reduced risk of image burn-in on the pixels of the electronic display.

Abstract: Aspects of the subject technology relate to display circuitry for displaying both standard dynamic range (SDR) and high dynamic range (HDR) content with an HDR display. The subject technology provides a headroom-based transfer function that maintains the contrast of the SDR content whether the display is operated in the SDR or HDR mode.

Abstract: An electronic device may include a display that displays virtual reality content. Control circuitry may estimate a brightness adaptation state of a user that is wearing the electronic device. The control circuitry may select a tone mapping curve and brightness level for the virtual reality content based on the user's adaptation state. To estimate the user's adaptation state, the control circuitry may gather ambient light information from an ambient light sensor, may gather physiological attributes of the user such as blink rate, pupil size, and eye openness from a camera, and may gather gaze position information from gaze detection circuitry. The control circuitry may optimize the brightness of the display based on the user's current adaptation state, or the control circuitry may shift the brightness of the display away from the user's adaptation level to help guide the adaptation state to the desired level.

Abstract: The present disclosure generally relates to user interfaces for displaying representations of media (an image, video).

Abstract: An electronic device may be provided with a display. A content generator such as a camera may capture images in high dynamic range mode or standard dynamic range mode. The images may have associated image metadata such as face detection information, camera settings, color and luminance histograms, and image classification information. Control circuitry in the electronic device may determine tone mapping parameters for the captured images based on the image metadata. The tone mapping parameters for a given image may be stored with the image in the metadata file. When it is desired to display the image, the control circuitry may apply a tone mapping process to the image according to the stored tone mapping parameters. The algorithm that is used to determine tone mapping parameters based on image metadata may be based on user preference data gathered from a population of users.

Abstract: An electronic device may include a display that displays virtual reality content. Control circuitry may estimate a brightness adaptation state of a user that is wearing the electronic device. The control circuitry may select a tone mapping curve and brightness level for the virtual reality content based on the user's adaptation state. To estimate the user's adaptation state, the control circuitry may gather ambient light information from an ambient light sensor, may gather physiological attributes of the user such as blink rate, pupil size, and eye openness from a camera, and may gather gaze position information from gaze detection circuitry. The control circuitry may optimize the brightness of the display based on the user's current adaptation state, or the control circuitry may shift the brightness of the display away from the user's adaptation level to help guide the adaptation state to the desired level.

Abstract: Aspects of the subject technology relate to display circuitry for displaying both standard dynamic range (SDR) and high dynamic range (HDR) content with an HDR display. The subject technology provides a headroom-based transfer function that maintains the contrast of the SDR content whether the display is operated in the SDR or HDR mode.

Abstract: An electronic device may be provided with a display. Standard and high dynamic range content may be produced by content generators operating on control circuitry. Standard dynamic range content and high dynamic range content may be simultaneously displayed. Tone mapping parameters may be produced by a tone mapping engine for use in displaying the standard and high dynamic range content. The tone mapping parameters may be selected based on factors such as ambient light level, user brightness setting, content statistics, display characteristics, point of gaze information, power consumption information, and per-window information. Tone mapping parameters may be selected to accommodate simultaneous display of standard and high dynamic range content. Tone mapping parameters may be temporarily modified in response to a user's point of gaze switching between standard dynamic range content and high dynamic range content.

Abstract: Aspects of the subject technology relate to display circuitry for displaying both standard dynamic range (SDR) and high dynamic range (HDR) content with an HDR display. The subject technology provides a headroom-based transfer function that maintains the contrast of the SDR content whether the display is operated in the SDR or HDR mode.

Abstract: An electronic device may be provided with a display. A content generator may generate frames of image data to be displayed on the display. Control circuitry in the electronic device may be used in implementing a tone mapping engine. The tone mapping engine may display content from the content generator on the display in accordance with a content-luminance-to-display luminance mapping. The content-luminance-to-display-luminance mapping is characterized by tone mapping parameters such as a black level, a reference white level, and a specular white level. The tone mapping engine may adjust the tone mapping parameters based on ambient light levels, user brightness settings, content statistics, and display characteristics.

Abstract: An electronic device may be provided with a display. The display may include a backlight having an array of locally dimmable light sources. Control circuitry may provide control signals to the backlight to produce light at different brightness levels. When the brightness level is below a threshold, the control circuitry may use pulse-width-modulation control signals to control the light sources in the backlight. When the brightness level is above the brightness threshold, the control circuitry may use analog control signals to control the light sources in the backlight. The control circuitry may adjust the threshold to achieve different dimming ranges for different brightness settings. A low brightness setting, for example, may have a lower threshold and lower dimming range than a high brightness setting, which may help produce darker darks when the display operates in a low brightness setting.

Abstract: An electronic device may be provided with a display. A content generator such as a camera may capture images in high dynamic range mode or standard dynamic range mode. The images may have associated image metadata such as face detection information, camera settings, color and luminance histograms, and image classification information. Control circuitry in the electronic device may determine tone mapping parameters for the captured images based on the image metadata. The tone mapping parameters for a given image may be stored with the image in the metadata file. When it is desired to display the image, the control circuitry may apply a tone mapping process to the image according to the stored tone mapping parameters. The algorithm that is used to determine tone mapping parameters based on image metadata may be based on user preference data gathered from a population of users.