公开(公告)号：US10354613B2

公开(公告)日：2019-07-16

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 ,  G09G5/06 ,  G06T11/00 ,  H04N1/60 ,  H04N5/57 ,  H04N9/73

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：US10123005B2

公开(公告)日：2018-11-06

申请号：US15048365

申请日：2016-02-19

Applicant: Apple Inc.

Inventor： Mingxia Gu ,  Andrew P. Aitken ,  Bongsun Lee ,  Gabriel Marcu ,  Ian C. Hendry ,  Jun Qi ,  Victor H. Yin ,  Wei Chen ,  Yanming Li

IPC: H04N9/64 ,  H04N17/04 ,  G09G3/00

Abstract: A display may store extended display identification data for communicating the capabilities of the display to a source device such as a graphics processing unit. The extended display identification data may include a red primary color value, a green primary color value, and a blue primary color value. The primary color values in the extended display identification data may be determined during manufacturing. For example, a light sensor may measure the native primary colors of the display, and calibration computing equipment may determine if the native primary colors of the display are within a target color gamut. If the native primary colors of the display are outside of the target color gamut by an amount larger than a threshold, the primary color values in the extended display identification data may be adjusted to account for the color variation.

公开(公告)号：US09076363B2

公开(公告)日：2015-07-07

申请号：US13736008

申请日：2013-01-07

Applicant: Apple Inc.

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

IPC: G01N21/00 ,  G09G3/00 ,  G02F1/13 ,  G01J3/02

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：US09055283B2

公开(公告)日：2015-06-09

申请号：US13841540

申请日：2013-03-15

Applicant: Apple Inc.

Inventor： Cheng Chen ,  Gabriel Marcu ,  Jiaying Wu ,  Anuj Bhatnagar ,  Hongqin Zhang

IPC: H04N17/02 ,  H04N17/04

CPC classification number: H04N17/02 ,  G09G5/02 ,  H04N17/04

Abstract: A method is provided for calibrating a display having color channels. Each color channel is capable of adjusting settings for pixel values at gray level entries. The method includes selecting a gray level entry for calibration. The method also includes providing a target white point in chromaticity coordinates (x, y) and a target brightness at the selected gray level entry to the display. The method further includes adjusting the setting for the pixel values for the color channels at the selected gray level entry such that the display achieves the target white point and the target brightness at an adjusted pixel value.

Abstract translation: 提供了一种校准具有彩色通道的显示器的方法。 每个颜色通道能够调整灰度条目下的像素值的设置。 该方法包括选择用于校准的灰度级条目。 该方法还包括将色度坐标（x，y）中的目标白点和在所选择的灰度级条目处的显示器提供目标亮度。 该方法还包括调整所选择的灰度级条目处的颜色通道的像素值的设置，使得显示器以调整的像素值实现目标白点和目标亮度。

公开(公告)号：US08970468B2

公开(公告)日：2015-03-03

申请号：US13683523

申请日：2012-11-21

Applicant: Apple Inc.

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

IPC: G09G5/02

CPC classification number: G09G5/02 ,  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 color-specific adjustment factors configured to adjust display colors and reduce temperature-related color shifts. During operation of the display, the display control circuitry may receive input pixel values for a display pixel. The display control circuitry may also receive display temperature information from a temperature sensor in the electronic device. The display control circuitry may determine adjustment factors based on a color associated with the input pixel values and the display temperature information. The display control circuitry may apply the adjustment factors to the input pixel values to obtain adapted pixel values. The adapted pixel values may 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显示颜色并减少与温度相关的颜色偏移的颜色特定调整因子。 在显示器的操作期间，显示控制电路可以接收用于显示像素的输入像素值。 显示控制电路还可以从电子设备中的温度传感器接收显示温度信息。 显示控制电路可以基于与输入像素值和显示温度信息相关联的颜色来确定调整因子。 显示控制电路可以将调整因子应用于输入像素值以获得适应的像素值。 可以将适应的像素值提供给显示像素。

公开(公告)号：US20140354521A1

公开(公告)日：2014-12-04

申请号：US13903179

申请日：2013-05-28

Applicant: Apple Inc.

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

IPC: G09G3/32

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：US20140333684A1

公开(公告)日：2014-11-13

申请号：US14340008

申请日：2014-07-24

Applicant: Apple Inc.

Inventor： Gabriel Marcu

IPC: G09G3/36

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：US20140267785A1

公开(公告)日：2014-09-18

申请号：US13841540

申请日：2013-03-15

Applicant: APPLE INC.

Inventor： Cheng Chen ,  Gabriel Marcu ,  Jiaying Wu ,  Anuj Bhatnagar ,  Hongqin Zhang

IPC: H04N17/02

CPC classification number: H04N17/02 ,  G09G5/02 ,  H04N17/04

Abstract: A method is provided for calibrating a display having color channels. Each color channel is capable of adjusting settings for pixel values at gray level entries. The method includes selecting a gray level entry for calibration. The method also includes providing a target white point in chromaticity coordinates (x, y) and a target brightness at the selected gray level entry to the display. The method further includes adjusting the setting for the pixel values for the color channels at the selected gray level entry such that the display achieves the target white point and the target brightness at an adjusted pixel value.

Abstract translation: 提供了一种校准具有彩色通道的显示器的方法。 每个颜色通道能够调整灰度条目下的像素值的设置。 该方法包括选择用于校准的灰度级条目。 该方法还包括将色度坐标（x，y）中的目标白点和在所选择的灰度级条目处的显示器提供目标亮度。 该方法还包括调整所选择的灰度级条目处的颜色通道的像素值的设置，使得显示器以调整的像素值实现目标白点和目标亮度。

公开(公告)号：US20140139571A1

公开(公告)日：2014-05-22

申请号：US13683523

申请日：2012-11-21

Applicant: APPLE INC.

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

IPC: G09G5/02

CPC classification number: G09G5/02 ,  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 color-specific adjustment factors configured to adjust display colors and reduce temperature-related color shifts. During operation of the display, the display control circuitry may receive input pixel values for a display pixel. The display control circuitry may also receive display temperature information from a temperature sensor in the electronic device. The display control circuitry may determine adjustment factors based on a color associated with the input pixel values and the display temperature information. The display control circuitry may apply the adjustment factors to the input pixel values to obtain adapted pixel values. The adapted pixel values may 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显示颜色并减少与温度相关的颜色偏移的颜色特定调整因子。 在显示器的操作期间，显示控制电路可以接收用于显示像素的输入像素值。 显示控制电路还可以从电子设备中的温度传感器接收显示温度信息。 显示控制电路可以基于与输入像素值和显示温度信息相关联的颜色来确定调整因子。 显示控制电路可以将调整因子应用于输入像素值以获得适应的像素值。 可以将适应的像素值提供给显示像素。

公开(公告)号：US20140139570A1

公开(公告)日：2014-05-22

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

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。