公开(公告)号：US20230360593A1

公开(公告)日：2023-11-09

申请号：US18350366

申请日：2023-07-11

Applicant: Apple Inc.

Inventor： Hjalmar Edzer Ayco Huitema ,  Thomas Charisoulis ,  Xia Li

IPC: G09G3/32 ,  G09G3/20 ,  H01L25/16 ,  H01L27/12

CPC classification number: G09G3/32 ,  G09G3/2003 ,  H01L25/167 ,  H01L27/124 ,  G09G2300/0814 ,  G09G2300/0842 ,  G09G2320/043 ,  G09G2320/0626

Abstract: A local active matrix display panel, circuits and methods of operation are described. In an embodiment, a local active matrix display panel includes an array of pixel driver chip, a thin film transistor layer in electrical contact with the array of pixel driver chips, and an array of light emitting diodes electrically connected with the thin film transistor layer.

公开(公告)号：US20230091644A1

公开(公告)日：2023-03-23

申请号：US17853261

申请日：2022-06-29

Applicant: Apple Inc.

Inventor： Thomas Charisoulis ,  Saif Choudhary ,  Xia Li ,  Tore Nauta

IPC: G09G3/20 ,  G09G3/3233

Abstract: A display system of a display includes a first light emitting diode, a second light emitting diode, a current source, and at least one transistor. The first and the second light emitting diodes emit light. The current source provides a constant current to the first light emitting diode and the second light emitting diode. Moreover, the at least one transistor removes the current or shunts the current towards the first light emitting diode, the second light emitting diode, or both. Removing the current or shunting the current towards the first light emitting diode, the second light emitting diode, or both, may blend outputs of the first light emitting diode and the second light emitting diode.

公开(公告)号：US10762836B1

公开(公告)日：2020-09-01

申请号：US15275023

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： Hopil Bae ,  Wei H. Yao ,  Mohammad B. Vahid Far ,  Yafei Bi ,  Xiaofeng Wang ,  Thomas Charisoulis ,  Hasan Akyol ,  Henry C. Jen ,  Derek K. Shaeffer

IPC: G09G3/3233

Abstract: An electronic display row drivers or column drivers that send reference currents or voltages to microdrivers to be used to drive micropixels to particular levels. The microdrivers, in turn, ship current to micropixels that display images based at least in part on the shipped current.

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：US10395594B1

公开(公告)日：2019-08-27

申请号：US15247661

申请日：2016-08-25

Applicant: Apple Inc.

Inventor： Thomas Charisoulis ,  Tore Nauta ,  Kapil Sakariya ,  Jean-Jacques P. Drolet

IPC: G09G3/3241 ,  G09G3/20 ,  G09G3/3275 ,  G09G3/3258 ,  H01L29/786 ,  H01L27/12 ,  H01L27/32 ,  H01L25/16

Abstract: Methods, systems, and apparatuses for controlling an emission of the light emitting devices are described herein. The light emitting devices may be light emitting diode (LED) devices including μLED devices or organic LED (OLED) devices. Emission control of the LED may be performed using a micro-scale driving circuit (e.g., μDriver) containing drive transistors for constant current driving of the light emitting devices. One embodiment provides for a display driver hardware circuit including emission logic, the emission logic including comparator logic to compare a data voltage from a storage capacitor to a voltage ramp provided via the TFT backplane, the comparator logic to cause the emission logic to generate an emission pulse to an LED device, and wherein the integrated circuit is to switch and drive a plurality of LED devices. In one embodiment each of the plurality of LED devices is a subpixel for a display device.