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公开(公告)号：US11145260B2
公开(公告)日：2021-10-12
申请号：US16836617
申请日：2020-03-31
Applicant: Apple Inc.
Inventor： Vehbi Calayir , James E. Brown , Venkataraman V. Iyer , Bret Rothenberg
Abstract: Aspects of the subject technology relate to an electronic device with a display. The display includes an array of light-emitting diodes. The array includes a plurality of subarrays of the light-emitting diodes. At least one driver circuit is coupled to the array of light-emitting diodes. The at least one driver circuit is configured to generate an adaptive pulse-width modulated (PWM) signal to control at least one subarray of the plurality of subarrays of the light-emitting diodes. The adaptive PWM signal is designed with each pulse of a group having a pulse width W, each pulse width being reduced until reaching a threshold pulse width, and one pulse being removed from the group of pulses.
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2.发明申请公开(公告)号：US20210018795A1
公开(公告)日：2021-01-21
申请号：US16897100
申请日：2020-06-09
Applicant: Apple Inc.
Inventor： Vehbi Calayir , James E. Brown , Bret Rothenberg
IPC: G02F1/13357 , H05B45/325 , H05B45/3725 , H05B45/10
Abstract: Aspects of the subject technology relate to an electronic device with a display. The display includes a first array of light-emitting diodes of a backlight unit to generate backlight for the display with each LED including an anode and a cathode. A first switch selectively couples a power supply voltage to a common anode of the first array of LEDs to control illumination of the first array of LEDs. A first discharge switch selectively couples a first voltage level to the common anode of the first array of LEDs to discharge the common anode to prevent an undesired current path through the first array of LEDs and associated undesired illumination.
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3.发明申请公开(公告)号：US20200380925A1
公开(公告)日：2020-12-03
申请号：US16836617
申请日：2020-03-31
Applicant: Apple Inc.
Inventor： Vehbi Calayir , James E. Brown , Venkataraman V. Iyer , Bret Rothenberg
Abstract: Aspects of the subject technology relate to an electronic device with a display. The display includes an array of light-emitting diodes. The array includes a plurality of subarrays of the light-emitting diodes. At least one driver circuit is coupled to the array of light-emitting diodes. The at least one driver circuit is configured to generate an adaptive pulse-width modulated (PWM) signal to control at least one subarray of the plurality of subarrays of the light-emitting diodes. The adaptive PWM signal is designed with each pulse of a group having a pulse width W, each pulse width being reduced until reaching a threshold pulse width, and one pulse being removed from the group of pulses.
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公开(公告)号：US11468854B2
公开(公告)日：2022-10-11
申请号：US16510635
申请日：2019-07-12
Applicant: Apple Inc.
Inventor： Vehbi Calayir , James E. Brown
Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes. The control circuitry may include feedforward control and a feedback control for a power supply for the light-emitting diodes. The feedforward control may include host circuitry for the device that determines a maximum zone current, a maximum row current, and the maximum row-to-row current step for an upcoming backlight frame while a current backlight frame is being executed. A headroom voltage for the upcoming backlight frame is determined based on the maximum zone current, the maximum row current, and/or the maximum row-to-row current step and provided to the power supply so that the power supply can settle at a corresponding supply voltage before the upcoming backlight frame is executed. The feedback control utilizes dynamic thresholds determined for each backlight frame to fine tune the feedforward-determined headroom voltage.
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公开(公告)号：US11107424B2
公开(公告)日：2021-08-31
申请号：US16521332
申请日：2019-07-24
Applicant: Apple Inc.
Inventor： Vehbi Calayir , James E. Brown
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 operate groups of rows of the LEDs with a common randomized row order that mitigates acoustic noise. The LEDs may be implemented in a backlight of a liquid crystal display and the common randomized row order that mitigates acoustic noise may be generated and/or executed to synchronize the LED operation with the operation of the pixels of the liquid crystal display.
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Patent Agency Ranking
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：US11798462B2
公开(公告)日：2023-10-24
申请号：US17507717
申请日：2021-10-21
Applicant: APPLE INC.
Inventor： Mohammad J. Navabi-Shirazi , Ming Gu , Alejandro Lara Ascorra , James E. Brown
CPC classification number: G09G3/32 , G09G5/10 , G09G2320/064 , G09G2360/142 , G09G2360/147
Abstract: Light emitting diode display panels with an open loop amplifier resulting in better brightness accuracy and matching between multiple light emitting diode strings.
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公开(公告)号：US20220130327A1
公开(公告)日：2022-04-28
申请号：US17507717
申请日：2021-10-21
Applicant: APPLE INC.
Inventor： Mohammad J. Navabi-Shirazi , Ming Gu , Alejandro Lara Ascorra , James E. Brown
Abstract: Light emitting diode display panels with an open loop amplifier resulting in better brightness accuracy and matching between multiple light emitting diode strings.
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公开(公告)号：US20200090600A1
公开(公告)日：2020-03-19
申请号：US16521332
申请日：2019-07-24
Applicant: Apple Inc.
Inventor： Vehbi Calayir , James E. Brown
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 operate groups of rows of the LEDs with a common randomized row order that mitigates acoustic noise. The LEDs may be implemented in a backlight of a liquid crystal display and the common randomized row order that mitigates acoustic noise may be generated and/or executed to synchronize the LED operation with the operation of the pixels of the liquid crystal display.
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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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