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公开(公告)号：US10339897B1
公开(公告)日：2019-07-02
申请号：US16298765
申请日：2019-03-11
IPC分类号： G09G3/3225 , G09G5/10
摘要： A system for calibrating an organic light emitting diode (OLED) display is presented. The calibration system includes a series of photodiodes coupled to at least a portion of illumination elements of the OLED display, a controller, and a driver circuit. The series of photodiodes is configured to measure, for one or more illumination elements, illumination latencies and time delays associated with different brightness levels. The controller obtains, for each illumination element, information about brightness levels associated with image light emitted from that illumination element for at least two consecutive video frames. Based on the measured latencies, the time delays and the information about brightness levels, the controller determines a driving signal for a driver circuit for each illumination element. The driver circuit applies the determined driving signal to that illumination element to calibrate the OLED display.
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公开(公告)号：US10311808B1
公开(公告)日：2019-06-04
申请号：US15495654
申请日：2017-04-24
摘要： A system for calibrating a liquid crystal display (LCD) includes a plurality of temperature sensors, a storage medium, and a controller. Each temperature sensor measures a current temperature of at least one pixel in the LCD. The storage medium stores information about latencies for any LC-based pixel, wherein each latency corresponds to a time period for transition from a starting to an ending illumination state for one temperature of the LC-based pixel. The controller determines, based on the current temperature, the transition information and frame information, a time for each pixel in at least a portion of the LCD to transition from a first to a second illumination state. The controller computes, based on transition times, an LC transition time for at least the portion of the LCD and performs calibration of at least the portion of the LCD based on the LC transition time.
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公开(公告)号：US10276130B1
公开(公告)日：2019-04-30
申请号：US16128914
申请日：2018-09-12
IPC分类号： G09G3/3225 , G09G5/10
摘要： A system for calibrating an organic light emitting diode (OLED) display is presented. The calibration system includes a series of photodiodes coupled to at least a portion of illumination elements of the OLED display, a controller, and a driver circuit. The series of photodiodes is configured to measure, for one or more illumination elements, illumination latencies and time delays associated with different brightness levels. The controller obtains, for each illumination element, information about brightness levels associated with image light emitted from that illumination element for at least two consecutive video frames. Based on the measured latencies, the time delays and the information about brightness levels, the controller determines a driving signal for a driver circuit for each illumination element. The driver circuit applies the determined driving signal to that illumination element to calibrate the OLED display.
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公开(公告)号：US11595646B2
公开(公告)日：2023-02-28
申请号：US16912290
申请日：2020-06-25
IPC分类号： H04N19/119 , H04N19/174 , G02B27/01 , G06F3/01 , G06T19/00 , H04L65/70 , H04L65/75
摘要： Disclosed herein are related to a device and a method of remotely rendering an image. In one approach, a device divides an image of an artificial reality space into a plurality of slices. In one approach, the device encodes a first slice of the plurality of slices. In one approach, the device encodes a portion of a second slice of the plurality of slices, while the device encodes a portion of the first slice. In one approach, the device transmits the encoded first slice of the plurality of slices to a head wearable display. In one approach, the device transmits the encoded second slice of the plurality of slices to the head wearable display, while the device transmits a portion of the encoded first slice to the head wearable display.
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公开(公告)号：US10553164B1
公开(公告)日：2020-02-04
申请号：US16377926
申请日：2019-04-08
摘要： A system for calibrating a liquid crystal display (LCD) includes a plurality of temperature sensors, a storage medium, and a controller. Each temperature sensor measures a current temperature of at least one pixel in the LCD. The storage medium stores information about latencies for any LC-based pixel, wherein each latency corresponds to a time period for transition from a starting to an ending illumination state for one temperature of the LC-based pixel. The controller determines, based on the current temperature, the transition information and frame information, a time for each pixel in at least a portion of the LCD to transition from a first to a second illumination state. The controller computes, based on transition times, an LC transition time for at least the portion of the LCD and performs calibration of at least the portion of the LCD based on the LC transition time.
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公开(公告)号：US10140955B1
公开(公告)日：2018-11-27
申请号：US15582307
申请日：2017-04-28
IPC分类号： G09G3/3225 , G09G5/10
摘要： A system for calibrating an organic light emitting diode (OLED) display is presented. The calibration system includes a series of photodiodes coupled to at least a portion of illumination elements of the OLED display, a controller, and a driver circuit. The series of photodiodes is configured to measure, for one or more illumination elements, illumination latencies and time delays associated with different brightness levels. The controller obtains, for each illumination element, information about brightness levels associated with image light emitted from that illumination element for at least two consecutive video frames. Based on the measured latencies, the time delays and the information about brightness levels, the controller determines a driving signal for a driver circuit for each illumination element. The driver circuit applies the determined driving signal to that illumination element to calibrate the OLED display.
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公开(公告)号：US20210092373A1
公开(公告)日：2021-03-25
申请号：US16912290
申请日：2020-06-25
IPC分类号： H04N19/119 , H04N19/174 , H04L29/06 , G06F3/01 , G06T19/00 , G02B27/01
摘要： Disclosed herein are related to a device and a method of remotely rendering an image. In one approach, a device divides an image of an artificial reality space into a plurality of slices. In one approach, the device encodes a first slice of the plurality of slices. In one approach, the device encodes a portion of a second slice of the plurality of slices, while the device encodes a portion of the first slice. In one approach, the device transmits the encoded first slice of the plurality of slices to a head wearable display. In one approach, the device transmits the encoded second slice of the plurality of slices to the head wearable display, while the device transmits a portion of the encoded first slice to the head wearable display.
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公开(公告)号：US10692473B1
公开(公告)日：2020-06-23
申请号：US15920355
申请日：2018-03-13
摘要： Channel selection, quantization, and compression are used to reduce data size of textures used in pixel correction. For example, an apparatus such as a head-mounted display may include circuitry that retrieves a compressed texture from the memory, the compressed texture being generated using various compression techniques, and decompresses the compressed texture to determine adjustment quantization values for sub-pixels based on the compressed values. The circuitry determines reconstructed brightness adjustment levels for the sub-pixels based on the adjustment quantization values, and renders an image frame based on the reconstructed brightness adjustment levels. In some embodiments, the apparatus or a separate device generates the compressed texture in a calibration and stores the texture in a memory of the apparatus for use during the pixel correction.
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公开(公告)号：US10198978B2
公开(公告)日：2019-02-05
申请号：US14969012
申请日：2015-12-15
摘要： An optical evaluation workstation evaluates quality metrics (e.g., optical contrast) of optical elements of a HMD. The workstation includes a test pattern, an optical element feed assembly, a light source, a camera and a control module. The light source backlights the test pattern with diffuse light. The optical element feed assembly receives an optical element of a HMD and places the optical element at a first distance from the test pattern corresponding to a distance between the optics block in the HMD and an exit pupil of the HMD. The camera images the test pattern through the optical element and the camera is positioned at a second distance from the test pattern corresponding to a distance between the exit pupil and an electronic display in the HMD. The control module generates a test report for presentation to a user based on the evaluation of the optical element.
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