公开(公告)号：US10249254B2

公开(公告)日：2019-04-02

申请号：US15007016

申请日：2016-01-26

Applicant: Apple Inc.

Inventor： Kasra Omid-Zohoor ,  Hyunwoo Nho ,  Keitaro Yamashita ,  Majid Gharghi ,  Sarath Chandrasekhar Venkatesh Kumar ,  Ting-Kuo Chang ,  Abbas Jamshidi Roudbari

IPC: G09G5/00 ,  G09G3/36

Abstract: Methods and devices useful in discharging an aberrant charge on the VCOM of an electronic display and harvesting energy from the VCOM of the electronic display are provided. By way of example, a method may include supplying an activation signal to an active switching device of an electronic display. The active switching device is configured to discharge an aberrant charge on a common electrode of the electronic display. The method further includes discharging the aberrant charge by way of the active switching device. Discharging the aberrant charge comprises preventing a possible occurrence of image artifacts from becoming apparent on the electronic display.

公开(公告)号：US20170365213A1

公开(公告)日：2017-12-21

申请号：US15246345

申请日：2016-08-24

Applicant: Apple Inc.

Inventor： Warren S. Rieutort-Louis ,  Keitaro Yamashita ,  Tsung-Ting Tsai ,  Yun Wang ,  Ting-Kuo Chang ,  Cheng-Ho Yu ,  Shinya Ono

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2320/041 ,  G09G2320/045

Abstract: An organic light-emitting diode display may contain an array of display pixels. Each display pixel may have a respective organic light-emitting diode that is controlled by a drive transistor. At low temperatures, it may be necessary to increase the amount of current through an organic light-emitting diode to achieve a desired luminance level. In order to increase the current through the light-emitting diode, the ground voltage level may be lowered. However, this may lead to thin-film transistors within the pixel leaking, which may result in undesirable display artifacts such as bright dots being displayed in a dark image. In order to prevent leakage in the transistors, the transistors may be coupled to separate reference voltage supplies or separate control lines. Additionally, the transistors may be positioned to minimize leakage even at low ground voltage levels.

公开(公告)号：US20160275889A1

公开(公告)日：2016-09-22

申请号：US14864136

申请日：2015-09-24

Applicant: Apple Inc.

Inventor： Cheng-Ho Yu ,  Keitaro Yamashita ,  Ting-Kuo Chang ,  Yun Wang ,  Hopil Bae ,  Kingsuk Brahma

IPC: G09G3/36 ,  G06F3/041

CPC classification number: G09G3/3648 ,  G06F3/0412 ,  G06F3/0416 ,  G09G3/3677 ,  G09G2300/0452 ,  G09G2300/0871 ,  G09G2310/0289 ,  G09G2310/061 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2354/00

Abstract: A touch screen display may include gate line driver circuitry coupled to a display pixel array. The display may be provided with intra-frame pausing (IFP) capabilities, where touch or other operations may be performed during one or more intra-frame blanking intervals. In one suitable arrangement, a gate driver may be operable in a high impedance mode, where the output of the gate driver is left floating during touch or IFP intervals. In another suitable arrangement, the gate driver may be operable in an IFP reduced stress mode, where a digital pass gate in the gate driver is deactivated during IFP intervals. In yet another suitable arrangement, the gate driver may be operable in an all-gate-high (AGH) power-down mode, where the output of each gate driver in the driver circuitry is driven high in parallel when the displayed is being powered off. These arrangements may be implemented in any suitable combination.

Abstract translation: 触摸屏显示器可以包括耦合到显示像素阵列的栅极线驱动器电路。 显示器可以具有帧内暂停（IFP）能力，其中可以在一个或多个帧内消隐间隔期间执行触摸或其它操作。 在一种合适的布置中，栅极驱动器可以以高阻抗模式工作，其中栅极驱动器的输出在触摸或IFP间隔期间保持悬空。 在另一种合适的布置中，栅极驱动器可以在IFP减小应力模式下操作，其中栅极驱动器中的数字通道在IFP间隔期间被去激活。 在另一种合适的布置中，栅极驱动器可以以全栅极高（AGH）掉电模式工作，其中当所显示的电源被断电时，驱动器电路中的每个栅极驱动器的输出并联驱动为高并行 。 这些布置可以以任何合适的组合来实现。

公开(公告)号：US20150356934A1

公开(公告)日：2015-12-10

申请号：US14549475

申请日：2014-11-20

Applicant: Apple Inc.

Inventor： Keitaro Yamashita ,  Ting-Kuo Chang

IPC: G09G3/36

CPC classification number: G09G3/3611 ,  G09G3/20 ,  G09G3/3677 ,  G09G2300/0439 ,  G09G2310/0224 ,  G09G2310/0267 ,  G09G2310/0286 ,  G09G2310/08 ,  G09G2330/04 ,  G11C19/28

Abstract: A touch screen display may include gate line driver circuitry coupled to a display pixel array. The display may be provided with intra-frame pausing (IFP) capabilities, where touch or other operations may be performed during one or more intra-frame blanking intervals. In one suitable arrangement, a gate driver circuit may include multiple gate line driver segments each of which is activated by a separate gate start pulse is that received through a demultiplexing circuit. In another suitable embodiment, the gate driver circuit may include analog or digital gate driver units that include control circuits for selectively (dis)charging internal nodes in the gate driver circuit so as to balance the amount of stress that is experienced by a drive transistor in gate driver units at or near an IFP row and the amount of stress that is experienced by the remaining gate driver units.

Abstract translation: 触摸屏显示器可以包括耦合到显示像素阵列的栅极线驱动器电路。 显示器可以具有帧内暂停（IFP）能力，其中可以在一个或多个帧内消隐间隔期间执行触摸或其它操作。 在一种合适的布置中，栅极驱动器电路可以包括多个栅极线驱动器段，每个栅极线驱动器段由通过解复用电路接收的单独的栅极起始脉冲激活。 在另一个合适的实施例中，栅极驱动器电路可以包括模拟或数字栅极驱动器单元，其包括用于选择性地（dis）对栅极驱动器电路中的内部节点进行充电的控制电路，以平衡由驱动晶体管经历的应力的量 在IFP行处或附近的栅极驱动器单元以及剩余的栅极驱动器单元经历的应力量。