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    Digital to analog converter
    11.
    发明授权
    Digital to analog converter 有权

    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.

    DISPLAY PANEL VOLTAGE PROTECTION SCHEME
    16.
    发明申请
    DISPLAY PANEL VOLTAGE PROTECTION SCHEME 有权

    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.

    Ground isolation systems and methods
    17.
    发明授权
    Ground isolation systems and methods 有权

    公开(公告)号：US12027120B2

    公开(公告)日：2024-07-02

    申请号：US17889231

    申请日：2022-08-16

    Applicant: Apple Inc.

    Inventor： Jaeyoung Kang ,  Baris Cagdaser ,  Yaser Azizi

    IPC: G09G3/3233 ,  G06F3/041

    CPC classification number: G09G3/3233 ,  G06F3/04164 ,  G09G2310/0262

    Abstract: Circuits, systems, methods, and devices are provided for isolating the first ground domain from the second ground domain while transmitting and receiving data between the two ground domains. The proposed high-voltage ground-isolating level shifter may be formed by AC coupling capacitors and a memory cell. The circuit under the high voltage ground domain may be located in an engineered high-voltage isolation well with a relatively large breakdown voltage.

    Ground Isolation Systems and Methods
    18.
    发明申请
    Ground Isolation Systems and Methods 有权

    公开(公告)号：US20230087831A1

    公开(公告)日：2023-03-23

    申请号：US17889231

    申请日：2022-08-16

    Applicant: Apple Inc.

    Inventor： Jaeyoung Kang ,  Baris Cagdaser ,  Yaser Azizi

    IPC: G09G3/3233 ,  G06F3/041

    Abstract: Circuits, systems, methods, and devices are provided for isolating the first ground domain from the second ground domain while transmitting and receiving data between the two ground domains. The proposed high-voltage ground-isolating level shifter may be formed by AC coupling capacitors and a memory cell. The circuit under the high voltage ground domain may be located in an engineered high-voltage isolation well with a relatively large breakdown voltage.

    Electronic Devices with Displays and Interposer Structures
    19.
    发明申请
    Electronic Devices with Displays and Interposer Structures 有权

    公开(公告)号：US20230062202A1

    公开(公告)日：2023-03-02

    申请号：US17825367

    申请日：2022-05-26

    Applicant: Apple Inc.

    Inventor： Steven M Scardato ,  Baris Cagdaser ,  Patrick B Bennett ,  Michael Slootsky ,  Alejandro X Levander ,  Henry C Jen

    IPC: G09G3/20

    Abstract: An electronic device may have a display. The display may include an array of pixels formed on a silicon substrate. Display driver circuitry may be formed in a display driver integrated circuit that outputs display data and other control signals for operating the display. An interposer structure may be included in the electronic device. The interposer structure may be attached to the silicon display substrate and may only partially overlap the silicon display substrate. The display driver integrated circuit may be attached to the interposer structure and provide signals to the display pixels through the interposer structure. In another possible arrangement, the display driver integrated circuit may bridge a gap between the silicon display substrate and the flexible printed circuit. The display driver integrated circuit only partially overlaps the silicon display substrate in this arrangement.

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