公开(公告)号：US20190213974A1

公开(公告)日：2019-07-11

申请号：US15868552

申请日：2018-01-11

Applicant: Apple Inc.

Inventor： Gabriel Marcu ,  Ian C. Hendry

IPC: G09G5/06

CPC classification number: G09G5/06 ,  G06F3/0482 ,  G06F3/04847 ,  G09G2320/0666 ,  G09G2354/00

Abstract: Systems, methods, and computer readable media to perform color matching between a source color profile and a user-selected color profile are described. Various embodiments receive user input to select a color profile to output source content to an output device, where the source content is associated with a source color profile. Various embodiments set the selected color profile as a target color profile and subsequently perform a first device-dependent color space conversion that converts the source color profile to the target color profile and uses the conversion to generate a target content from the source content. A second device-dependent color space conversion can then be performed to convert the target color profile to a device color profile and uses the conversion to generate output device content from the target content.

公开(公告)号：US20180350322A1

公开(公告)日：2018-12-06

申请号：US15621459

申请日：2017-06-13

Applicant: Apple Inc.

Inventor： Gabriel Marcu ,  Kenneth Greenebaum ,  Lu Zhang ,  Jiaying Wu ,  Ian Hendry

IPC: G09G5/02

CPC classification number: G09G5/06 ,  G09G2340/06 ,  G09G2360/144

Abstract: Scalable color balancing techniques for processing images to be presented on displays are described. One technique includes receiving ambient light color information from an ambient light sensor and input image data to be presented via a display coincident with receiving the ambient light color information. The display may have a first white point at a time prior to receiving the input image data. The technique may include determining a second white point for the display based on the input image data and the ambient light color information. The first and second white points may differ from each other. The technique may also include generating one or more chromatic adaptation transforms (CATs) based on the white points. Output image data may be generated based on applying the one or more CATs to the input image data. The output image data may be presented via the display. Other embodiments are described.

公开(公告)号：US09870739B2

公开(公告)日：2018-01-16

申请号：US14918402

申请日：2015-10-20

Applicant: Apple Inc.

Inventor： Yi Huang ,  Chenhua You ,  Gabriel Marcu ,  Jun Qi ,  Marc Albrecht

IPC: G09G3/34 ,  G09G3/36 ,  G02F1/1335 ,  F21V8/00

CPC classification number: G09G3/3413 ,  G02B6/0073 ,  G02F1/133603 ,  G02F1/133621 ,  G02F2001/133601 ,  G02F2001/133614 ,  G02F2202/36 ,  G02F2203/21 ,  G02F2203/60 ,  G09G3/3607 ,  G09G3/3611 ,  G09G2320/0233 ,  G09G2320/0242 ,  G09G2320/0285 ,  G09G2320/041 ,  G09G2320/0646 ,  G09G2360/16

Abstract: An electronic device may have a display such as a liquid crystal display. The display may have an array of pixels that display images to a user. Backlight structures may provide the array of pixels with backlight illumination at a backlight illumination level. The backlight structures may have a light source with an array of light-emitting diodes and photoluminescent material that is pumped by pump light from the light-emitting diodes. The backlight illumination may experience color variations as a function of the backlight illumination level. Circuitry in the electronic device may be used to implement a backlight level color compensator. The backlight level color compensator may apply color correction factors to the image data of the displayed images to compensate for variations in color of the image data due to variations in backlight illumination level and operating temperature.

公开(公告)号：US09483975B2

公开(公告)日：2016-11-01

申请号：US13903179

申请日：2013-05-28

Applicant: Apple Inc.

Inventor： Gabriel Marcu ,  Marc Albrecht ,  Sandro H. Pintz

IPC: G09G3/32 ,  G09G3/20

CPC classification number: G09G3/3208 ,  G09G3/2003 ,  G09G2300/0452 ,  G09G2340/06

Abstract: An electronic device may include a display having an array of display pixels. Storage and processing circuitry may generate display data for the display in an RGB input color space. The display may display the display data in an RGBW output color space. Display control circuitry may use sets of predetermined conversion factors to convert display data from the RGB input color space to the RGBW output color space without requiring conversion to a device-independent color space. Each set of predetermined conversion factors may be associated with a color in a set of predetermined colors. Using the sets of predetermined conversion factors, the display control circuitry may convert RGB values in the input color space to RGBW values in the output color space. The display control circuitry may supply data signals corresponding to the display data in the RGBW output color space to the array of display pixels.

Abstract translation: 电子设备可以包括具有显示像素阵列的显示器。 存储和处理电路可以在RGB输入颜色空间中生成用于显示的显示数据。 显示器可以在RGBW输出颜色空间中显示显示数据。 显示控制电路可以使用一组预定的转换因子将来自RGB输入色彩空间的显示数据转换为RGBW输出色彩空间，而不需要转换为与设备无关的色彩空间。 每组预定转换因子可以与一组预定颜色中的颜色相关联。 使用这些预定转换因子的集合，显示控制电路可以将输入颜色空间中的RGB值转换为输出颜色空间中的RGBW值。 显示控制电路可以将与RGBW输出颜色空间中的显示数据相对应的数据信号提供给显示像素阵列。

公开(公告)号：US09437163B2

公开(公告)日：2016-09-06

申请号：US14340008

申请日：2014-07-24

Applicant: Apple Inc.

Inventor： Gabriel Marcu

IPC: G09G5/12 ,  G09G3/36 ,  G09G3/20

CPC classification number: G09G5/12 ,  G09G3/20 ,  G09G3/3611 ,  G09G2300/02 ,  G09G2320/02 ,  G09G2320/0271 ,  G09G2320/0276 ,  G09G2320/0626 ,  G09G2320/0673

Abstract: Methods and apparatuses to varying the apparent brightness of a display are described. The change in apparent brightness is accompanied by unchanged in relative contrast, rendering a display with higher or lower brightness while maintaining contrast fidelity. In exemplary embodiments, the signals for the middle tone levels are adjusted to increase or decrease the brightness intensity, while keeping constant the gamma correction. This maintains the relative contrast of images while rendering them at a different brightness. Implementations of the present process include an adjusted gamma correction lookup table, incorporated in the video card to modify the video signal before reaching the display. The present invention can be used for matching the brightness of two or more displays or to provide compensation for variations in display characteristics to ensure consistency in display brightness within a data processing model.

Abstract translation: 描述了改变显示器的表观亮度的方法和装置。 视觉亮度的变化伴随着相对对比度的不变，使显示器的亮度更高或更低，同时保持对比度保真度。 在示例性实施例中，调整中间色调电平的信号以增加或减少亮度强度，同时保持伽马校正的恒定。 这可以保持图像的相对对比度，同时以不同的亮度渲染它们。 本方法的实现包括调整后的伽马校正查找表，其被并入视频卡中，以在到达显示器之前修改视频信号。 本发明可以用于匹配两个或更多显示器的亮度，或者为显示特性的变化提供补偿，以确保数据处理模型内的显示亮度的一致性。

公开(公告)号：US20160140889A1

公开(公告)日：2016-05-19

申请号：US14673685

申请日：2015-03-30

Applicant: Apple Inc.

Inventor： Jiaying Wu ,  Lu Zhang ,  Cheng Chen ,  Gabriel Marcu ,  Chaohao Wang ,  Ming Xu ,  Ricardo Motta ,  Wei Chen ,  John Z. Zhong

IPC: G09G3/20

CPC classification number: G09G3/2003 ,  G09G3/3413 ,  G09G5/02 ,  G09G2320/0242 ,  G09G2320/0261 ,  G09G2320/0666 ,  G09G2360/144 ,  G09G2360/145

Abstract: An electronic device may include a display having an array of display pixels and having display control circuitry that controls the operation of the display. The display control circuitry may adaptively adjust the display output based on ambient lighting conditions. For example, in cooler ambient lighting conditions such as those dominated by daylight, the display may display neutral colors using a relatively cool white. When the display is operated in warmer ambient lighting conditions such as those dominated by indoor light sources, the display may display neutral colors using a relatively warm white. Adapting to the ambient lighting conditions may ensure that the user does not perceive color shifts on the display as the user's vision chromatically adapts to different ambient lighting conditions. Adaptively adjusting images in this way can also have beneficial effects on the human circadian rhythm by displaying warmer colors in the evening.

Abstract translation: 电子设备可以包括具有显示像素阵列并具有控制显示器的操作的显示控制电路的显示器。 显示控制电路可以基于环境照明条件自适应地调整显示输出。 例如，在较冷的环境照明条件下，例如由日光控制的环境照明条件下，显示器可以使用相当冷的白色显示中性色。 当显示器在诸如由室内光源所主导的那些的温暖的环境照明条件下操作时，显示器可以使用相对温暖的白色显示中性色。 适应环境照明条件可以确保用户在视觉色彩适应不同的环境照明条件时不会察觉显示器上的色彩偏移。 以这种方式自适应调整图像也可以通过在晚上显示温暖的颜色对人类昼夜节律有益。

公开(公告)号：US20150348502A1

公开(公告)日：2015-12-03

申请号：US14291194

申请日：2014-05-30

Applicant: Apple Inc.

Inventor： Gabriel Marcu ,  Kenneth I. Greenebaum ,  Ian C. Hendry

IPC: G09G5/04 ,  G06K9/46 ,  G09G5/10 ,  G06T7/40

CPC classification number: G09G5/04 ,  G06K9/4652 ,  G09G3/2003 ,  G09G5/02 ,  G09G5/10 ,  G09G2320/0606 ,  G09G2320/0666 ,  G09G2320/0693 ,  G09G2354/00 ,  H04N1/6077 ,  H04N9/3182 ,  H04N9/73

Abstract: A method and user interface for direct setting of black and white points. Black point is set using a slider and matching of gray shades. White point setting is performed by having a setting object move within a defined region, such as a square or circle, with the area where the setting object moves being adjusted dynamically based on the location of the setting object with respect to the defined region. When the area is the desired white, the setting is complete. Preferably the defined region has a varying color border to allow a reference for the user in moving the setting object. A more detailed setting of gray levels can be accomplished by providing a gray scale with reference points. Each reference point has an associated white point setting area, so that settings are developed for each reference point. Settings at other locations are determined by interpolation or extrapolation.

Abstract translation: 用于直接设置黑白点的方法和用户界面。 使用滑块设置黑点，并配置灰色阴影。 白点设置是通过使设定对象在定义的区域内移动的，例如正方形或圆形，其中设置对象移动的区域基于设置对象相对于定义的区域的位置动态地调整。 当该区域是所需的白色时，设置完成。 优选地，限定区域具有变化的颜色边界，以允许用户在移动设置对象时的参考。 灰度级的更详细设置可以通过提供参考点的灰度级来实现。 每个参考点都有一个关联的白点设置区域，因此为每个参考点开发设置。 其他位置的设置通过插值或外推来确定。

公开(公告)号：US20140192209A1

公开(公告)日：2014-07-10

申请号：US13736008

申请日：2013-01-07

Applicant: APPLE INC.

Inventor： Ye YIN ,  Gabriel Marcu ,  Julia C. Davoud

IPC: G09G3/00

CPC classification number: G09G3/006 ,  G01J3/02 ,  G01J3/021 ,  G01J3/18 ,  G01J3/506 ,  G01J3/51 ,  G01J3/513 ,  G01J3/524 ,  G01J2003/2826 ,  G02F1/13

Abstract: An optical test equipment/method for display testing that features parallel testing/sensing configuration that covers spectrum and colorimetric quantities with spatial resolution is disclosed. In one embodiment, a spectra-camera, which is a hybrid system consisting of both a single-point spectrometer and an imaging colorimeter, can be configured for concurrent display artifact and parametric testing. An aperture mirror with a hole in the middle splits an image of a test display into two parts. One part of the image passes through the hole and is directed to the spectrometer for display parametric testing. The rest of the image is reflected off the aperture mirror for concurrent display artifact testing with the colorimeter. In another embodiment, a beam splitter can be used instead of an aperture mirror. In yet another embodiment, the single-point high accuracy spectrometer can be used to calibrate the low accuracy imaging colorimeter.

Abstract translation: 公开了一种用于显示测试的光学测试设备/方法，其具有覆盖具有空间分辨率的光谱和比色量的并行测试/感测配置。 在一个实施例中，作为由单点光谱仪和成像色度计组成的混合系统的光谱相机可以被配置用于并发显示伪像和参数测试。 在中间有孔的孔径镜将测试显示器的图像分成两部分。 图像的一部分通过孔，并被引导到光谱仪进行显示参数测试。 图像的其余部分从光圈镜反射出来，用于使用色度计进行并发显示伪影测试。 在另一个实施例中，可以使用分束器代替孔径镜。 在另一个实施例中，单点高精度光谱仪可用于校准低精度成像色度计。

公开(公告)号：US11024255B2

公开(公告)日：2021-06-01

申请号：US16406076

申请日：2019-05-08

Applicant: Apple Inc.

Inventor： Gabriel Marcu ,  Rong Liu

IPC: G09G5/02

Abstract: A display panel is calibrated to a target white point. A maximum luminance value of the display panel is attenuated from a first luminance value associated with the target white point to a second luminance value based on an attenuation factor. The second luminance value is equal to or lower than the first luminance value. The display panel is re-calibrated based on a chromaticity of the target white point and the second luminance value to generate calibration data. The calibration data is flashed into memory associated with the display panel. During operation, the white point of the panel may be shifted from the target to a chromatically imbalanced (e.g., reddish) white point that may cause motion-induced color trail or color breakup artifacts. The attenuated second luminance value ensures the motion-induced color trail or color breakup artifacts are adequately masked when the panel is driven with the chromatically imbalanced white point.

公开(公告)号：US10733957B2

公开(公告)日：2020-08-04

申请号：US16143043

申请日：2018-09-26

Applicant: Apple Inc.

Inventor： Gabriel Marcu

IPC: G09G5/06 ,  G09G5/04 ,  G06T7/90 ,  G09G5/10 ,  G06T7/00

Abstract: First color response values of vertices of a first unit cube defined within a cubic color output space of the display device are measured. For each of first intermediate values determined based on the measured first color response values, RGB adjustment values are calculated by tetrahedral decomposition and interpolation so that each calculated RGB adjustment value is within a boundary defined by the first unit cube. When boundary defined by the first unit cube is reached, a second unit cube is defined within the cubic color output space, wherein a first vertex of a plurality of vertices of the second unit cube corresponds to the calculated RGB adjustment values of a previous intermediate value that is one of the first intermediate values. Second color response values corresponding to the plurality of vertices of the second unit cube except the first vertex are measured.