公开(公告)号：US10755618B2

公开(公告)日：2020-08-25

申请号：US16389899

申请日：2019-04-19

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Hyunwoo Nho ,  Chin-Wei Lin ,  Mohammad B. Vahid Far ,  Jie Won Ryu ,  Kingsuk Brahma ,  Junhua Tan ,  Sun-Il Chang ,  Shinya Ono ,  Jesse Aaron Richmond ,  Yafei Bi ,  Derek K. Shaeffer ,  Myungjoon Choi ,  Shiping Shen

IPC: G09G3/00

Abstract: Systems and methods are provided for differential sensing (DS), difference-differential sensing (DDS), correlated double sampling (CDS), correlated-correlated double sampling (CDS-CDS) and/or programmable capacitor matching to reduce display panel sensing noise. An electronic device may include one or more processors that generate image data according to sensing operations. The one or more processors may reference a sensing pattern as part of sensing operations. Applying test sensing signals based on the sensing pattern may help reduce error associated with sensing operations.

公开(公告)号：US10650737B2

公开(公告)日：2020-05-12

申请号：US15754107

申请日：2016-09-21

Applicant: Apple Inc.

Inventor： Mohammad B. Vahid Far ,  Yafei Bi ,  Kapil V. Sakariya ,  Hopil Bae ,  Shinya Ono ,  Thomas Charisoulis ,  Chin-Wei Lin

IPC: G09G3/3216

Abstract: Systems and apparatuses for hybrid micro-driver architectures having time multiplexing for driving displays are described. In one embodiment, a display (e.g., hybrid display architecture) includes a backplane and a micro-driver circuitry that is coupled to the backplane. The backplane includes circuitry (e.g., sample and hold circuitry) for sampling and holding analog data and for time multiplexing analog data. The micro-driver circuitry includes at least a capacitor of a ramp generator for generating a ramp voltage based on the analog data of the backplane and drive circuitry to cause at least one emission pulse for emitting a display element.

公开(公告)号：US20200043402A1

公开(公告)日：2020-02-06

申请号：US16181212

申请日：2018-11-05

Applicant: APPLE INC.

Inventor： Kasra Omid-Zohoor ,  Marc J. DeVincentis ,  Paolo Sacchetto ,  Sinan Alousi ,  Yafei Bi

IPC: G09G3/32 ,  G09G3/3225 ,  G09G3/36

Abstract: A flat-panel display device and method to compensate for a voltage drop by supply voltage in the flat-panel display.

公开(公告)号：US20200035202A1

公开(公告)日：2020-01-30

申请号：US16584807

申请日：2019-09-26

Applicant: Apple Inc.

Inventor： Koorosh Aflatooni ,  Minhyuk Choi ,  Mohammad Ali Jangda ,  Sang Y. Youn ,  Yafei Bi ,  Jean-Pierre Guillou ,  Wei Y. Yao

IPC: G09G5/10 ,  G06K9/00

Abstract: An electronic device may have a display with an array of pixels. The device may have an array of components such as an array of light sensors for capturing fingerprints of a user through an array of corresponding transparent windows in the display. A capacitive touch sensor, proximity sensor, force sensor, or other sensor may be used by control circuitry in the device to monitor for the presence of a user's finger over the array of light sensors. In response, the control circuitry can direct the display to illuminate a subset of the pixels, thereby illuminating the user's finger and causing reflected light from the finger to illuminate the array of light sensors for a fingerprint capture operation. The display may have display driver circuitry that facilitates the momentary illumination of the subset of pixels with uniform flash data while image data is displayed in other portions of the display.

公开(公告)号：US20190340998A1

公开(公告)日：2019-11-07

申请号：US16384716

申请日：2019-04-15

Applicant: Apple Inc.

Inventor： Yafei Bi ,  Lei He ,  Mohammad B. Vahid Far ,  Mir B. Ghaderi ,  Venu Madhav Duggineni ,  Vanessa C. Heppolette ,  Joshua P. De Cesare ,  Hyuck-Jae Lee

IPC: G09G5/00

Abstract: Systems, methods, and apparatus to transition a display device between operating modes using a single dedicated pin of a circuit connected to the display device. The dedicated pin can receive a packet signal corresponding to an operating mode for the display device, and the circuit can thereafter cause the display device to transition into the desired operating mode in response to receiving the packet signal. The operating mode can be a low power on mode where an interface connected to the circuit is deactivated and at least some circuitry of the display device is throttled or powered off. The display device can be driven in an all black state while in the low power on mode, thereby allowing the display device to more quickly transition out of the low power on mode compared to when the display device is completely off.

公开(公告)号：US10360826B2

公开(公告)日：2019-07-23

申请号：US15273458

申请日：2016-09-22

Applicant: Apple Inc.

Inventor： Yafei Bi ,  Xiaofeng Wang ,  Haifeng Li ,  Mohammad B. Vahid Far ,  Hopil Bae ,  Hung Shen Lin ,  Hyunwoo Nho ,  Wei H. Yao

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291 ,  G09G3/00

Abstract: An electronic device includes one or more unit pixels with a first node, a second node, and a third node. The device includes light-emitting-diode (LED) voltage (Vled) sensing circuitry, that senses Vled of the one or more unit pixels, by: sampling a charge of a capacitor of the one or more unit pixels, transitioning from the sampling, and reading out the Vled based upon a change in the charge of the capacitor, such that an operation of the unit pixel may be modified based upon the Vled.

公开(公告)号：US10277119B2

公开(公告)日：2019-04-30

申请号：US15798193

申请日：2017-10-30

Applicant: Apple Inc.

Inventor： Weijun Yao ,  David A. Stronks ,  Hopil Bae ,  Kingsuk Brahma ,  Wei Hsin Yao ,  Yafei Bi ,  Yingxuan Li

IPC: G06F3/044 ,  H02M3/07 ,  G06F3/041 ,  G06F1/3234 ,  H01L23/64

Abstract: A charge pump that can be configured to operate in a first mode and a second mode is disclosed. The charge pump can comprise a charging capacitor coupled to a first node and configured to transfer a first DC voltage to the first node. The charge pump can also comprise a first output node and a second output node coupled to the first node. During the first mode, the first output node can be configured to output a second DC voltage based on the first DC voltage, and the second output node can be configured to output a third DC voltage based on the first DC voltage. During the second mode, the first output node can be configured to output the second DC voltage, and the second output node can be configured to output an AC voltage, the AC voltage being offset by the third DC voltage.

公开(公告)号：US20190102599A1

公开(公告)日：2019-04-04

申请号：US15720827

申请日：2017-09-29

Applicant: Apple Inc.

Inventor： Mohammad Yeke Yazdandoost ,  Yafei Bi ,  Kingsuk Brahma ,  Giovanni Gozzini ,  Mohammad Jangda

IPC: G06K9/00 ,  G06K19/077 ,  G06K17/00

Abstract: An electronic device may include a display and a biometric image sensor configured for biometric image sensing. The electronic device may also include a display driver coupled to the display. The display driver may include first and second memories and a processor configured to alternatingly read respective illumination pattern data from the first and second memories to drive the display during biometric image sensing.

公开(公告)号：US10235927B2

公开(公告)日：2019-03-19

申请号：US15367143

申请日：2016-12-01

Applicant: Apple Inc.

Inventor： Haifeng Li ,  Kingsuk Brahma ,  Yafei Bi

IPC: G09G3/36 ,  G09G3/20

Abstract: Aspects of the subject technology relate to electronic devices with displays. A display may include display control circuitry including an internal oscillator and one or more counters. The counters may be used to calibrate a display line time to a system line time to ensure that each displayed frame is synchronized with received display data frames from system circuitry for the electronic device. The counters may include a first counter that maintains a current-row count during operation of a current row of display pixels during a current display frame and a second counter that maintains a current-frame count that indicates a number of counts accumulated during the current display frame. The current-row count and the current-frame count may be referenced to the system line time during operation of each pixel row to remove any errors accumulated during operation of the previous pixel rows.

公开(公告)号：US10200059B2

公开(公告)日：2019-02-05

申请号：US15697233

申请日：2017-09-06

Applicant: Apple Inc.

Inventor： Baris Cagdaser ,  Derek K. Shaeffer ,  Hopil Bae ,  Jesse Aaron Richmond ,  Jie Won Ryu ,  Kingsuk Brahma ,  Mohammad B. Vahid Far ,  Shingo Hatanaka ,  Yafei Bi ,  Yuichi Okuda

IPC: H03M1/78 ,  H03M1/76 ,  H03M1/74 ,  H03M1/68

Abstract: A device includes a resistor string that includes a plurality resistors with voltage taps disposed therebetween. The device may select one particular voltage tap of the plurality of voltage taps based on received gray level data for a pixel of a display. The device also includes a first amplifier that may be coupled to a first terminal end of the resistor string. The device additionally includes a second amplifier that may be coupled to a second terminal end of the resistor string, wherein the plurality of voltage taps may each supply a tap voltage derived from a voltage between the first amplifier and the second amplifier, wherein any tap amplifier of the device coupled to a voltage tap of the plurality of voltage taps provides a reference voltage thereto.