公开(公告)号：US11776508B2

公开(公告)日：2023-10-03

申请号：US16729795

申请日：2019-12-30

Applicant: ATI TECHNOLOGIES ULC

Inventor： Shu Key Keith Lee ,  David I. J. Glen

IPC: H04N5/57 ,  H04N19/124 ,  G09G5/37 ,  G09G5/10

CPC classification number: G09G5/37 ,  G09G5/10 ,  G09G2330/12

Abstract: A system includes a display monitor compatible with a video specification having a reference EOTF while exhibiting an actual EOTF that deviates from the reference EOFT. The system further includes a video source subsystem operable to determine an approximated EOTF representative of the actual EOTF based on user input received from a display of at least one test pattern to the user via the display monitor. The at least one test pattern is intended to elicit input from the user based on a visual inspection of the at least one test pattern by the user. The video source subsystem further is to convert color values of each video image of a stream of images to corresponding non-linear codewords based on the approximated EOTF, and transmit the codewords to the display monitor for display as display images representative of the video images.

公开(公告)号：US11430410B2

公开(公告)日：2022-08-30

申请号：US16889318

申请日：2020-06-01

Applicant: ATI TECHNOLOGIES ULC

Inventor： Jun Lei ,  Syed Athar Hussain ,  David I. J. Glen ,  Rajeevan Panchacharamoorthy ,  Fatemeh Amirnavaei ,  David Galiffi ,  Arshad Rahman ,  Boris Ivanovic

IPC: G09G5/12 ,  G06F3/14

Abstract: A display system modifies display cycles of one or more displays to perform a system operation while avoiding visual perturbations at the one or more displays. The display system modifies, synchronizes, or both, blanking periods of the one or more displays such that blanking periods equal or exceed a blackout duration and overlap for at least the blackout duration. Then the system performs the system operation during an overlapping portion of the one or more blanking periods, where the system operation reduces availability of display data at the one or more displays.

公开(公告)号：US10832389B2

公开(公告)日：2020-11-10

申请号：US16218708

申请日：2018-12-13

Applicant: ATI Technologies ULC

Inventor： Jie Zhou ,  David I. J. Glen

IPC: G06K9/40 ,  G06T5/00 ,  H04N5/235

Abstract: There are many instances where a standard dynamic range (“SDR”) overlay is displayed over high dynamic range (“HDR”) content on HDR displays. Because the overlay is SDR, the maximum brightness of the overlay is much lower than the maximum brightness of the HDR content, which can lead to the SDR elements being obscured if those elements have at least some transparency. The present disclosure provides techniques including modifying the luminance of either or both of the HDR and SDR content when an SDR layer with some transparency is displayed over HDR content. A variety of techniques are provided. In one example, a fixed adjustment is applied to pixels of one or both of the SDR layer and the HDR layer. The fixed adjustment comprises decreasing the luminance of the HDR layer and/or increasing the luminance of the SDR layer. In another example, a variable adjustment is applied.

公开(公告)号：US10134106B2

公开(公告)日：2018-11-20

申请号：US14018869

申请日：2013-09-05

Applicant: ATI TECHNOLOGIES ULC

Inventor： Gabriel Abarca ,  David I. J. Glen

IPC: G06T1/60 ,  G06F3/14 ,  G09G5/399 ,  G09G5/395

Abstract: A method of and device for providing image frames is provided. The method includes outputting portions of a first frame that have changed relative to the one or more other frames without outputting portions of the first frame that have not changed relative to the one or more other frames. Each of the portions are determined to be changed if a rendering engine has written to a frame buffer for a location within boundaries of the portion. This outputting is done in response to one or more portions of a first frame having changed relative to one or more other frames.

公开(公告)号：US20180247616A1

公开(公告)日：2018-08-30

申请号：US15966525

申请日：2018-04-30

Applicant: ATI Technologies ULC

Inventor： David I. J. Glen ,  Syed A. Hussain

IPC: G09G5/395 ,  G09G5/00

CPC classification number: G09G5/395 ,  G09G5/005 ,  G09G2320/0247 ,  G09G2340/02 ,  G09G2340/0435 ,  G09G2360/08

Abstract: Briefly, methods and apparatus provide image content to, and display image content on, displays with a variable refresh rate that reduce frame delays and avoid display image flickering problems. In one example, the methods and apparatus are operative to vary a display's refresh rate by varying a current frame's vertical blanking period by re-providing the current frame for display prior to providing a new frame for display. In this fashion, the displaying of a new frame may be advanced by assuring that a new frame can be provided for display as soon as it has been rendered and available for display. In addition, by re-providing the current frame for display prior to providing a new frame for display, new frames may be provided for display at rates within a safe rate range such that display image flickering issues are avoided or reduced.

公开(公告)号：US09001141B2

公开(公告)日：2015-04-07

申请号：US13625208

申请日：2012-09-24

Applicant: ATI Technologies ULC

Inventor： David I. J. Glen ,  Jie Zhou

IPC: G09G5/00 ,  G09G5/02 ,  G06F15/16 ,  G09G5/36 ,  H04N5/202 ,  H04N5/46 ,  H04N5/445 ,  G03F3/08 ,  G06K9/00 ,  G06F3/00 ,  G06F3/048 ,  G09G5/14

CPC classification number: G09G5/02 ,  G09G5/14 ,  G09G2340/06

Abstract: An apparatus and method for providing display information generates, independently from an operating system, different screen subsections of a screen image using independent gamut remapping configurations to generate an output image in a target gamut space of a display. The method and apparatus also provides the generated output image for display or may display the generated output image.

Abstract translation: 用于提供显示信息的装置和方法独立于操作系统生成使用独立色域重映射配置的屏幕图像的不同屏幕子部分，以在显示器的目标色域空间中生成输出图像。 所述方法和装置还提供用于显示的所生成的输出图像，或者可以显示生成的输出图像。

公开(公告)号：US12277915B2

公开(公告)日：2025-04-15

申请号：US18108251

申请日：2023-02-10

Applicant: ATI TECHNOLOGIES ULC

Inventor： David I. J. Glen

IPC: G09G5/00 ,  G09G5/36

Abstract: A display system supports variable refresh rates that include a plurality of refresh rates. A source such as a graphics processing unit (GPU) provides frames to the display system at a selected one of the refresh rates. The refresh rates are factored into a corresponding plurality of prime factors. A plurality of numbers of lines per frame in frames provided at the plurality of refresh rates is determined based on one or more ratios of the plurality of refresh rates, the plurality of prime factors, and a line rate for providing frames to the display system at the plurality of refresh rates. The source then selectively provides frames to the display system at one refresh rate of the plurality of refresh rates using the same line rate regardless of which refresh rate is chosen. Furthermore, the number of lines per frame is an integer for frames provided at the refresh rates.

公开(公告)号：US12033273B2

公开(公告)日：2024-07-09

申请号：US17972307

申请日：2022-10-24

Applicant: ATI TECHNOLOGIES ULC

Inventor： David I. J. Glen ,  Keith Lee

IPC: G06T15/50 ,  G06T7/90 ,  G06T11/00

CPC classification number: G06T15/503 ,  G06T7/90 ,  G06T11/001 ,  G06T2210/62

Abstract: In some examples, an apparatus obtains source layer pixels, such as those of a content image and first destination layer pixels, such as those of a destination image. The first destination layer pixels have associated alpha values. The apparatus obtains information that indicates a first blending color format for the alpha values. The first blending color format is different from a first destination layer color format for the first destination layer pixels and an output color format for a display. The apparatus converts the source and/or first destination layer pixels to the first blending color format. The apparatus generates first alpha blended pixels based on alpha blending the source layer pixels with the first destination layer pixels using the associated alpha values. The apparatus provides, for display on the display, the first alpha blended pixels.

公开(公告)号：US20210407456A1

公开(公告)日：2021-12-30

申请号：US17029736

申请日：2020-09-23

Applicant: ATI TECHNOLOGIES ULC

Inventor： Syed Athar HUSSAIN ,  Anthony WL KOO ,  David I. J. Glen

IPC: G09G5/00 ,  G06T1/20 ,  G06T9/00

Abstract: A graphics processing unit (GPU) of a processing system transmits pixel data for a frame to a display in a compressed burst, so that the pixel data is communicated at a rate that is higher than the rate at which the display scans out the pixel data to refresh the frame at a display panel. By transmitting pixel data for the frame in a compressed burst, the GPU shortens the time spent transmitting the pixel data and extends the time before the next frame of pixel data is to be transmitted. During the extended time before the next frame of pixel data is to be transmitted, the GPU saves power by placing portions of the processing system in a reduced power mode.

公开(公告)号：US20210383772A1

公开(公告)日：2021-12-09

申请号：US17407981

申请日：2021-08-20

Applicant: ATI Technologies ULC

Inventor： Keith Lee ,  David I. J. Glen ,  Jie Zhou ,  Yuxin Chen

IPC: G09G5/06

Abstract: Systems, apparatuses, and methods for reducing three dimensional (3D) lookup table (LUT) interpolation error while minimizing on-chip storage are disclosed. A processor generates a plurality of mappings from a first gamut to a second gamut at locations interspersed throughout a 3D representation of the pixel component space. For example, in one implementation, the processor calculates mappings for 17×17×17 vertices within the 3D representation. Other implementations can include other numbers of vertices. Rather than increasing the number of vertices to reduce interpolation error, the processor calculates mappings for centroids of the sub-cubes defined by the vertices within the 3D representation of the first gamut. This results in a smaller increase to the LUT size as compared to increasing the number of vertices. The centroid mappings are used for performing tetrahedral interpolation to map source pixels in the first gamut into the second gamut with a reduced amount of interpolation error.