公开(公告)号：WO2019005489A1

公开(公告)日：2019-01-03

申请号：PCT/US2018/037382

申请日：2018-06-13

Applicant: APPLE INC.

Inventor： ALBRECHT, Marc ,  BAAR, Teun, R. ,  BONNIER, Nicolas, P. ,  CHANG, Sean ,  KIM, ByoungSuk ,  ZALATIMO, David, S.

IPC: G09G3/34

Abstract: An electronic device may be provided with a display. The display may include a backlight having an array of locally dimmable light sources. Control circuitry may provide control signals to the backlight to produce light at different brightness levels. When the brightness level is below a threshold, the control circuitry may use pulse-width-modulation control signals to control the light sources in the backlight. When the brightness level is above the brightness threshold, the control circuitry may use analog control signals to control the light sources in the backlight. The control circuitry may adjust the threshold to achieve different dimming ranges for different brightness settings. A low brightness setting, for example, may have a lower threshold and lower dimming range than a high brightness setting, which may help produce darker darks when the display operates in a low brightness setting.

公开(公告)号：WO2016190955A1

公开(公告)日：2016-12-01

申请号：PCT/US2016/025048

申请日：2016-03-30

Applicant: APPLE INC.

Inventor： WANG, Chaohao ,  TRIPATHI, Brijesh ,  TANN, Christopher, Philip Alan ,  ZALATIMO, David, S. ,  COTE, Guy ,  NAN, Hao ,  ALBRECHT, Marc ,  SACCHETTO, Paolo ,  PINTZ, Sandro, H.

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: 电子设备可以生成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。 图像帧可以以正极性和负极性显示，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。 电荷累积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，可以对每个子区域进行单独的监视，以获得过剩电荷累积的风险。