公开(公告)号：US11361520B2

公开(公告)日：2022-06-14

申请号：US17240954

申请日：2021-04-26

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Ajit Ninan ,  Neil Mammen ,  Tyrome Y. Brown

IPC: G06T19/00 ,  G06T15/00 ,  H04N13/156 ,  H04N13/183 ,  H04N21/81

Abstract: Spatial information that describes spatial locations of visual objects as in a three-dimensional (3D) image space as represented in one or more multi-view unlayered images is accessed. Based on the spatial information, a cinema image layer and one or more device image layers are generated from the one or more multi-view unlayered images. A multi-layer multi-view video signal comprising the cinema image layer and the device image layers is sent to downstream devices for rendering.

公开(公告)号：US11195483B2

公开(公告)日：2021-12-07

申请号：US16352751

申请日：2019-03-13

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Ajit Ninan ,  Chun Chi Wan

IPC: G09G3/36 ,  G09G3/34 ,  G02F1/13357 ,  F21V8/00 ,  G09G3/32 ,  G02F1/1335

Abstract: A non-uniform illumination pattern is determined with a display panel of a display device. The non-uniform illumination pattern comprises different values of the one or more illumination properties in first and second spatial regions of the display panel. An illumination compensation pattern is generated based at least in part on the non-uniform illumination pattern. The illumination compensation pattern is configured to homogenize values of the illumination properties in a plurality of spatial regions of the display panel that include the first and second spatial regions, and implemented in the display device.

公开(公告)号：US10992936B2

公开(公告)日：2021-04-27

申请号：US16680031

申请日：2019-11-11

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Wenhui Jia ,  Ajit Ninan ,  Arkady Ten ,  Gregory John Ward

IPC: H04N19/124 ,  H04N9/77 ,  H04N19/44 ,  H04N5/235 ,  H04N9/67 ,  G06T9/00 ,  H04N19/136 ,  H04N19/169 ,  H04N19/182 ,  H04N19/186 ,  H04N19/30 ,  H04N19/50 ,  H04N19/70

Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.

公开(公告)号：US10928638B2

公开(公告)日：2021-02-23

申请号：US15798274

申请日：2017-10-30

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Ajit Ninan ,  Chaitanya Atluru ,  James Thomas Triplett ,  Chun Chi Wan

IPC: G02C7/08 ,  G02B27/01 ,  G06F3/01 ,  H04N13/344 ,  G06F1/16 ,  H04N13/398

Abstract: An eyewear device comprises a left lens assembly and a right lens assembly. The left lens assembly includes a left focus tunable lens and a left focus fixed lens. A right lens assembly includes a right focus tunable lens and a right focus fixed lens. The eyewear device may be used in 3D display applications, virtual reality applications, augmented reality applications, remote presence applications, etc. The eyewear device may also be used as vision correction glasses.

公开(公告)号：US10679582B2

公开(公告)日：2020-06-09

申请号：US15761365

申请日：2016-09-21

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Ajit Ninan

IPC: G09G5/00 ,  G09G5/10 ,  G09G3/20 ,  H04N5/202 ,  G06T5/00 ,  G09G3/36 ,  G06F3/14

Abstract: A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values. A display can natively process the device-specific image data to accurately reproduce a corresponding front of panel perceptual light, according to a perceptual curve electro-optical transfer function.

公开(公告)号：US10657906B2

公开(公告)日：2020-05-19

申请号：US15884957

申请日：2018-01-31

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Ajit Ninan ,  Chun Chi Wan

IPC: G09G3/34 ,  G09G3/36 ,  H05B45/20 ,  H05B45/24 ,  G09G3/32 ,  G02F1/13357

Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light into second light. The light conversion layer can include quantum dots or phosphor materials. Modulation drive signals are generated to determine transmission of the second light through individual subpixels of the display. These modulation drive signals can be adjusted based on one or more light field simulations. The light field simulations can include: (i) a color shift for a pixel based on a point spread function of the illumination sources; (ii) binning difference of individual illumination sources; (iii) temperature dependence of display components on performance; or (iv) combinations thereof.

公开(公告)号：US20200134780A1

公开(公告)日：2020-04-30

申请号：US16660548

申请日：2019-10-22

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Alexandre Chapiro ,  Chaitanya Atluru ,  Chun Chi Wan ,  Haricharan Lakshman ,  William Rozzi ,  Shane Ruggieri ,  Ajit Ninan

IPC: G06T3/00 ,  G06T19/00 ,  G06F3/01 ,  G02B27/01

Abstract: Peripheral-vision expanded images are streamed to a video streaming client. The peripheral-vision expanded images are generated from source images in reference to view directions of the viewer at respective time points. View direction data is collected and received in real time while the viewer is viewing display images derived from the peripheral-vision expanded images. A second peripheral-vision expanded image is generated from a second source image in reference to a second view direction of the viewer at a second time point. The second peripheral-vision expanded image has a focal-vision image portion covering the second view direction of the viewer and a peripheral-vision image portion outside the focal-vision image portion. The second peripheral-vision expanded image is transmitted to the video streaming client.

公开(公告)号：US10534222B2

公开(公告)日：2020-01-14

申请号：US16416137

申请日：2019-05-17

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Chun Chi Wan ,  Ajit Ninan

IPC: G06F3/038 ,  G02F1/13357 ,  G09G3/34

Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The light conversion layer can include quantum dot materials. Liquid crystal display (LCD) modulation drive signals are generated to determine transmission of the second light through individual color subpixels of the display. These LCD modulation drive signals can be adjusted based on one or more light field simulations to account for non-uniform, spatial color shifts. Alternatively, one or more light field simulations based on a uniformity assumption determine intermediate LCD modulation drive signals. A compensation field simulation, using backlight drive signals, is then used to adjust the intermediate LCD modulation drive signal for color correction.

公开(公告)号：US10264259B2

公开(公告)日：2019-04-16

申请号：US16011543

申请日：2018-06-18

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Wenhui Jia ,  Ajit Ninan ,  Arkady Ten ,  Gregory John Ward

IPC: H04N9/77 ,  H04N19/124 ,  H04N5/235 ,  H04N19/169 ,  G06T9/00 ,  H04N9/67 ,  H04N19/50 ,  H04N19/30 ,  H04N19/186 ,  H04N19/136 ,  H04N19/44 ,  H04N19/70 ,  H04N19/182

Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.

公开(公告)号：US09927568B2

公开(公告)日：2018-03-27

申请号：US15036391

申请日：2014-11-12

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Ajit Ninan ,  Chun Chi Wan

IPC: G08B5/00 ,  F21V8/00

CPC classification number: G02B6/0025 ,  G02B6/0028 ,  G02B6/0068 ,  G02B6/0075

Abstract: An apparatus comprising a light source (110), one or more light guides (104), and a light diffuser (102) having an integration chamber (114) surrounded by one or more light diffusive areas (108). The one or more light diffusive areas are configured with one or more first openings as one or more ingress areas (112) to receive light from the light source and one or more second openings as one or more egress areas (106) to provide light to the one or more light guides. For illuminating visual indicators with uniform light.