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公开(公告)号：US20200042264A1
公开(公告)日：2020-02-06
申请号：US16529705
申请日：2019-08-01
Applicant: Apple Inc.
Inventor： Fenghua Zheng , David S. Zalatimo , James E. Brown , Sachiko Oda , Johan L. Piper
Abstract: Aspects of the subject technology relate to electronic device display circuitry and methods of operating the display. The display circuitry a panel driver interface that decodes digital display data, for each display frame, received from host circuitry of the electronic device. The digital display data includes error correction and detection information for frame and line configuration information distributed in a frame packet and multiple line packets for each display frame. The frame and line configuration information facilitates, efficient, low-error, digital control of various display operational features.
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公开(公告)号：US11099804B2
公开(公告)日：2021-08-24
申请号：US16529705
申请日：2019-08-01
Applicant: Apple Inc.
Inventor： Fenghua Zheng , David S. Zalatimo , James E. Brown , Sachiko Oda , Johan L. Piper
Abstract: Aspects of the subject technology relate to electronic device display circuitry and methods of operating the display. The display circuitry a panel driver interface that decodes digital display data, for each display frame, received from host circuitry of the electronic device. The digital display data includes error correction and detection information for frame and line configuration information distributed in a frame packet and multiple line packets for each display frame. The frame and line configuration information facilitates, efficient, low-error, digital control of various display operational features.
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公开(公告)号：US10134334B2
公开(公告)日：2018-11-20
申请号：US15262449
申请日：2016-09-12
Applicant: Apple Inc.
Inventor： Johan L. Piper , James C. Aamold , Shengkui Gao , Hung Sheng Lin , Hyunwoo Nho
IPC: G09G3/36 , G09G3/3233
Abstract: In order to reduce non-uniform luminance and/or chrominance, a display panel can determine, on a pixel-by-pixel basis in at least a row of pixels, a correction for voltage drops in the display panel. The voltage drop can be estimated based on a state of pixels in the display panel corresponding to at least a portion of a current frame of image data and at least a portion of a previous frame of image data. Moreover, based on the correction, the display plane can modify on the pixel-by-pixel basis in at least the row: a supply voltage applied to the display panel; a digital representation of the image data in the current frame that correspond to the pixels; and pixel drive signals corresponding to the image data in the current frame. Furthermore, the correction may be based on a predefined calibration constant and/or may be dynamically calculated.
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4.发明申请公开(公告)号：US20240402390A1
公开(公告)日：2024-12-05
申请号：US18678594
申请日：2024-05-30
Applicant: Apple Inc.
Inventor： Youngbae Son , Sean E. Doris , Shengchang Cai , Zachary M. Beiley , Johan L. Piper
Abstract: An electronic device includes a light-transmissive tint layer implemented on a light-transmissive viewing surface, on which a display panel is used to display augmented reality image content overlaid on background image content. A tint driver is used to apply electrical inputs to the light-transmissive tint layer to change optical properties of the light-transmissive tint layer. The temperature of the light-transmissive tint layer may be inferred from an electrical current applied to the light-transmissive tint layer. Dynamic values of the optical properties of the light-transmissive tint layer are predicted based on the electrical inputs and the temperature of the light-transmissive tint layer. The dynamic values of the optical properties are used to generate real-time compensated image data for the augmented reality image content.
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公开(公告)号：US20190244572A1
公开(公告)日：2019-08-08
申请号：US16265902
申请日：2019-02-01
Applicant: Apple Inc.
Inventor： Chengrui LE , Chaohao Wang , Li Tao , Lingyu Hong , Paolo Sacchetto , Sheng Zhang , Xiaokai Li , Yingying Tang , Yunhui Hou , Johan L. Piper
CPC classification number: G09G3/3406 , G09G3/342 , G09G3/36 , G09G2320/0247 , G09G2320/0261 , G09G2320/041 , G09G2320/0606 , G09G2320/062 , G09G2320/0633 , G09G2320/064 , G09G2320/0646 , G09G2320/103 , G09G2340/0435 , G09G2354/00 , G09G2360/16
Abstract: Aspects of the subject technology relate to pulsed backlight operation for a display backlight. Backlight pulse patterns are provided that include steady state pulse patterns to be applied during operation of a liquid crystal display unit of the display at a corresponding frame rate. The backlight pulse patterns can be arranged to prevent visible artifacts such as flicker or strobing, particularly at or near a transition between LCD frame rates. In some scenarios, transition pulse patterns are provided,
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Patent Agency Ranking
公开(公告)号：US10235936B2
公开(公告)日：2019-03-19
申请号：US15064230
申请日：2016-03-08
Applicant: Apple Inc.
Inventor： Johan L. Piper , James C. Aamold
IPC: G09G3/30 , G09G3/3233
Abstract: This application relates to systems, methods, and apparatus for reducing non-uniform luminance of an organic light emitting diode (OLED) display panel. In order to reduce non-uniform luminance, the display panel can compensate for an amount of voltage drop that is occurring across a line of the display panel. The voltage drop can be estimated based on image data provided to the display panel and one or more calibration constants stored by the display panel. The calibration constants can be generated during manufacturing of the display panel in order to equip the display panel with an accurate means for predicting voltage drop across each line of the display panel. During calibration, a predetermined display pattern is output by the display panel. Thereafter, an amount of luminance projected from the display panel is compared with an expected amount of luminance associated with the predetermined display pattern to calculate the calibration constant.
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公开(公告)号：US20240420615A1
公开(公告)日：2024-12-19
申请号：US18660166
申请日：2024-05-09
Applicant: Apple Inc.
Inventor： Hasan Akyol , Henry C. Jen , Stanley B. Wang , Baris Cagdaser , Rahul Shukla , John T. Wetherell , Bin Huang , Derek K. Shaeffer , Pablo Moreno Galbis , Johan L. Piper , Lawrence C. Tan , Adam Adjiwibawa , Manu Mishra
IPC: G09G3/20
Abstract: An electronic device may include a display panel and a display driver. The display panel may include multiple pixels each receiving a supply voltage and a respective data voltage to emit light. The display driver may include a low drop-out regulator (LDO) to provide the supply voltage to the pixels. The LDO may operate in a normal operation mode and a hard park mode. In the normal operation mode, the LDO may generate the supply voltage based on receiving a reference voltage and a bias voltage within a bias voltage range to operate in the normal operation mode. In the hard park mode, the LDO may become idle (e.g., shut-down mode) based on receiving a hard park mode voltages from dedicated replacement circuits. For example, including the dedicated reference voltage replacement circuit with the display driver may improve reliability and efficiency of the electronic device when de-energizing the LDO.
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公开(公告)号：US11081070B2
公开(公告)日：2021-08-03
申请号：US16521324
申请日：2019-07-24
Applicant: Apple Inc.
Inventor： Vehbi Calayir , Johan L. Piper
Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes (LEDs). The control circuitry may include an LED timing controller integrated circuit configured to receive data from host circuitry for an electronic device, an LED row driver integrated circuit, the LED row driver integrated circuit configured to connect a high voltage power rail to the light-emitting diodes via plurality of switches, and LED column driver integrated circuits each configured to adjust a current through at least one of the light-emitting diodes.
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公开(公告)号：US10971086B2
公开(公告)日：2021-04-06
申请号：US16265902
申请日：2019-02-01
Applicant: Apple Inc.
Inventor： Chengrui Le , Chaohao Wang , Li Tao , Lingyu Hong , Paolo Sacchetto , Sheng Zhang , Xiaokai Li , Yingying Tang , Yunhui Hou , Johan L. Piper
Abstract: Aspects of the subject technology relate to pulsed backlight operation for a display backlight. Backlight pulse patterns are provided that include steady state pulse patterns to be applied during operation of a liquid crystal display unit of the display at a corresponding frame rate. The backlight pulse patterns can be arranged to prevent visible artifacts such as flicker or strobing, particularly at or near a transition between LCD frame rates. In some scenarios, transition pulse patterns are provided.
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公开(公告)号：US20200090608A1
公开(公告)日：2020-03-19
申请号：US16521324
申请日：2019-07-24
Applicant: Apple Inc.
Inventor： Vehbi Calayir , Johan L. Piper
Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes (LEDs). The control circuitry may include an LED timing controller integrated circuit configured to receive data from host circuitry for an electronic device, an LED row driver integrated circuit, the LED row driver integrated circuit configured to connect a high voltage power rail to the light-emitting diodes via plurality of switches, and LED column driver integrated circuits each configured to adjust a current through at least one of the light-emitting diodes.
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