公开(公告)号：US20170372675A1

公开(公告)日：2017-12-28

申请号：US15701086

申请日：2017-09-11

Applicant: Apple Inc.

Inventor： Myung-Je Cho ,  Jim Chou ,  Marc Albrecht ,  Jean-Pierre Guillou

IPC: G09G5/00 ,  G09G5/39 ,  G09G5/10 ,  G09G5/02 ,  G06T5/00

Abstract: Systems and methods for improving perceived image quality of an electronic display, which includes a display region with a rounded border and a display pixel at a pixel position adjacent the rounded border. A display pipeline communicatively coupled to the electronic display receives first image data that indicates target luminance at the pixel position in a rectangular image frame; determines a gain value associated with the pixel position from a gain map, in which the gain value is inversely proportional to distance between the display pixel and the rounded border; determines second image data that indicates target luminance of the display pixel by processing the first image data based at least in part on the gain value; and outputs the second image data to the electronic display to facilitate displaying a non-rectangular portion of the image frame on the display region.

公开(公告)号：US20170243548A1

公开(公告)日：2017-08-24

申请号：US15275374

申请日：2016-09-24

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Lu Zhang ,  Zhibing Ge ,  Shih-Chyuan Fan Jiang ,  Ilie Garbacea ,  Marc Albrecht ,  Kingsuk Brahma ,  Hopil Bae ,  Paolo Sacchetto ,  Jie Won Ryu ,  Sandro H. Pintz ,  Chengrui Le

IPC: G09G3/34 ,  G09G3/36 ,  G09G3/3258

CPC classification number: G09G3/20 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/0626 ,  G09G2320/0693 ,  G09G2340/0435 ,  G09G2360/16

Abstract: Systems and methods are provided for improving displayed image quality of an electronic display that includes a display pixel. The electronic display displays a first image frame directly after a second image frame by applying an analog electrical signal to the display pixel. To facilitate display of the first image frame, circuitry receives image data corresponding to the image frame, in which the image data includes a grayscale value that indicates target luminance of the display pixel; determines expected refresh rate of the first image frame based at least in part on actual refresh rate of the second image frame; determines a pixel response correction offset based at least in part on the expected refresh rate of the first image frame; and determines processed image data by applying the pixel response correction offset to the grayscale value, in which the processed image data indicates magnitude of the analog electrical signal.

公开(公告)号：US09741305B2

公开(公告)日：2017-08-22

申请号：US14818001

申请日：2015-08-04

Applicant: Apple Inc.

Inventor： Tobias Jung ,  Marc Albrecht ,  Sandro H. Pintz

IPC: G09G3/36 ,  G06T5/40 ,  G09G3/20 ,  G09G3/34

CPC classification number: G09G3/3648 ,  G06T5/007 ,  G06T5/40 ,  G09G3/3406 ,  G09G3/3426 ,  G09G2320/0233 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2360/16

Abstract: Methods, systems, and devices for improving contrast, dynamic range, and power consumption of a backlight in a display are provided. By way of example, a method includes receiving image data to be displayed on pixels of a display panel, generating a global histogram of the image data, generating a plurality of thresholds based on the global histogram, and defining a first threshold and a second threshold of the plurality of thresholds as local thresholds based on the global histogram and a local histogram. The first threshold and the second threshold are generated according to a local tone mapping function. The method further includes adjusting a luminance of one or more of pixels of the display panel based at least in part on the first threshold and the second threshold.

公开(公告)号：US20160351138A1

公开(公告)日：2016-12-01

申请号：US14722620

申请日：2015-05-27

Applicant: Apple Inc.

Inventor： Chaohao Wang ,  Brijesh Tripathi ,  Christopher Philip Alan Tann ,  David S. Zalatimo ,  Guy Cote ,  Hao Nan ,  Marc Albrecht ,  Paolo Sacchetto ,  Sandro H. Pintz

IPC: G09G3/36

CPC classification number: G09G3/3614 ,  G09G2320/0204 ,  G09G2320/0247 ,  G09G2320/0257 ,  G09G2320/046 ,  G09G2340/0435 ,  G09G2360/16

Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

Abstract translation: 电子设备可以产生要显示在显示器上的内容。 显示器可以具有用于显示内容的图像帧的液晶显示像素阵列。 可以以正极性和负极性显示图像帧以帮助减少电荷积累效应。 电荷累积跟踪器可以分析图像帧以确定何时存在电荷累积过多的风险。 电荷累积跟踪器可以分析关于灰度级，帧持续时间和帧极性的信息。 电荷积累跟踪器可以计算整个图像帧的电荷累积度量，或者可以分别处理每个帧的子区域。 当分区域被单独处理时，每个子区域可以被单独地监视以产生过量电荷累积的风险。

公开(公告)号：US20160071485A1

公开(公告)日：2016-03-10

申请号：US14477454

申请日：2014-09-04

Applicant: Apple Inc.

Inventor： Brijesh Tripathi ,  Peter F. Holland ,  Marc Albrecht ,  Christopher P. Tann

IPC: G09G5/10

CPC classification number: G09G5/10 ,  G09G3/2044 ,  G09G3/3406 ,  G09G5/12 ,  G09G5/36 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2340/10 ,  G09G2360/144 ,  G09G2370/04

Abstract: Systems, apparatuses, and methods for synchronizing backlight adjustments to frame updates in a display pipeline. A change in the ambient light is detected and as a result, backlight settings are adjusted. To offset a reduction in the backlight, the color intensity in the frames is increased. While the change in ambient light is detected asynchronously, the adjustment to the backlight settings and color intensity is synchronized to a frame update via a virtual channel for the auxiliary channel of the display interface.

Abstract translation: 用于在显示管道中将背光调节与帧更新同步的系统，装置和方法。 检测到环境光的变化，结果调整背光设置。 为了抵消背光的降低，帧中的颜色强度增加。 当环境光的变化被异步检测时，对背光设置和颜色强度的调节通过用于显示接口的辅助通道的虚拟通道被同步到帧更新。

公开(公告)号：US09275607B2

公开(公告)日：2016-03-01

申请号：US13683201

申请日：2012-11-21

Applicant: Apple Inc.

Inventor： Marc Albrecht ,  Ulrich Barnhoefer ,  Gabriel Marcu ,  Sandro H. Pintz ,  Keith Cox

IPC: G09G5/02 ,  G09G5/06 ,  G09G3/20

CPC classification number: G09G5/06 ,  G09G3/2003 ,  G09G2320/0242 ,  G09G2320/041 ,  G09G2320/0666 ,  G09G2320/0693 ,  G09G2360/144

Abstract: An electronic device may include a display and display control circuitry. The display may be calibrated to compensate for changes in display temperature. Display calibration information may be obtained during manufacturing and may be stored in the electronic device. The display calibration information may include adjustment factors configured to adjust incoming pixel values to reduce temperature-related color shifts. During operation of the electronic device, display control circuitry may determine the temperature at different locations on the display. The display control circuitry may determine the temperature at a given display pixel using the temperatures at the different locations on the display. The display control circuitry may determine adjustment values based on the temperature at the display pixel. The display control circuitry may apply the adjustment values to incoming pixel values to obtain adapted pixel values, which may in turn be provided to the display pixel.

Abstract translation: 电子设备可以包括显示和显示控制电路。 可以校准显示器以补偿显示温度的变化。 显示校准信息可以在制造过程中获得，并且可以存储在电子设备中。 显示校准信息可以包括被配置为调整输入像素值以减少温度相关颜色偏移的调节因子。 在电子设备的操作期间，显示控制电路可以确定显示器上不同位置处的温度。 显示控制电路可以使用显示器上不同位置处的温度来确定给定显示像素处的温度。 显示控制电路可以基于显示像素处的温度来确定调整值。 显示控制电路可以将调整值应用于输入像素值，以获得适应的像素值，其可依次提供给显示像素。

公开(公告)号：US09268579B2

公开(公告)日：2016-02-23

申请号：US13906175

申请日：2013-05-30

Applicant: Apple Inc.

Inventor： Christopher P. Tann ,  Marc Albrecht ,  Keith Cox

IPC: G06F9/24 ,  G06F15/177 ,  G06F9/44 ,  G06F1/32 ,  G09G5/10 ,  G06F3/0346

CPC classification number: G06F9/4411 ,  G06F1/3203 ,  G06F1/3206 ,  G06F1/3218 ,  G06F1/3231 ,  G06F1/325 ,  G06F1/3265 ,  G06F3/0346 ,  G06F9/4418 ,  G06F2200/1637 ,  G09G5/10 ,  G09G2320/041 ,  G09G2330/026 ,  Y02D10/153

Abstract: This paper describes various embodiments that relate to personal computer systems, and accurate initialization of computer hardware of personal computer systems from a low-power and/or power-off state. According to one embodiment of the invention, a computer system includes a device operative to be powered down to the power-off state dependent upon an amount of user activity on the computer system. The computer system also includes a device controller operative to initialize the device from the power-off state to a power-on state responsive to user activity on the computer system. The device controller has at least one sensor device operative to determining a physical variable related to the device, and operating characteristics of the device are related to the physical variable.

Abstract translation: 本文描述了与个人计算机系统相关的各种实施例，以及从低功率和/或断电状态对个人计算机系统的计算机硬件的准确初始化。 根据本发明的一个实施例，计算机系统包括根据计算机系统上的用户活动量而可操作地关闭到断电状态的设备。 计算机系统还包括设备控制器，用于响应于用户在计算机系统上的活动而将设备从电源关闭状态初始化为电源接通状态。 设备控制器具有至少一个传感器设备，用于确定与设备相关的物理变量，并且设备的操作特性与物理变量相关。

公开(公告)号：US09230506B2

公开(公告)日：2016-01-05

申请号：US13801918

申请日：2013-03-13

Applicant: Apple Inc.

Inventor： Marc Albrecht ,  Christopher Philip Alan Tann ,  Nicholas G. Roland

IPC: G09G5/00

Abstract: A method is provided for compensating for brightness change in a display. The method includes storing a plurality of look-up tables (LUTs), where each table has a plurality of pixel levels at a variable refresh rate (VRR) and a plurality of brightness signals that provide compensation for the brightness change when refresh rate is changed during a panel self-refresh (PSR). The method also includes receiving an input signal from a graphics processing unit (GPU) and determining the VRR of the input signal from the GPU. The method further includes obtaining the LUT at the determined VRR of the input signal and adjusting the input signal to produce an output signal that compensates for the brightness change for each pixel or sub-pixel in a timing controller based upon the LUT at the determined VRR. The method further includes transmitting the output signal to the display. A system is also provided.

公开(公告)号：US20140198114A1

公开(公告)日：2014-07-17

申请号：US14155292

申请日：2014-01-14

Applicant: Apple Inc.

Inventor： Prasanna Nambi ,  Jason N. Gomez ,  Fenghua Zheng ,  Paolo Sacchetto ,  Sandro H. Pintz ,  Taesung Kim ,  Christopher P. Tann ,  Marc Albrecht ,  David W. Lum

IPC: G09G3/36

CPC classification number: G09G3/3618 ,  G06T1/20 ,  G06T2210/52 ,  G09G3/36 ,  G09G3/3611 ,  G09G3/3648 ,  G09G3/3655 ,  G09G3/3696 ,  G09G2310/08 ,  G09G2320/0626 ,  G09G2330/02 ,  G09G2330/021 ,  G09G2340/0435 ,  G09G2360/18 ,  G09G2370/08

Abstract: The disclosure describes procedures for dynamically employing a variable refresh rate at an LCD display of a consumer electronic device, such as a laptop computer, a tablet computer, a mobile phone, or a music player device. In some configurations, the consumer electronic device can include a host system portion, having one or more processors and a display system portion, having a timing controller, a buffer circuit, a display driver, and a display panel. The display system can receive image data and image control data from a GPU of the host system, evaluate the received image control data to determine a reduced refresh rate (RRR) for employing at the display panel, and then transition to the RRR, whenever practicable, to conserve power. In some scenarios, the transition to the RRR can be a transition from a LRR of 50 hertz or above to a RRR of 40 hertz or below.