公开(公告)号：US20140354709A1

公开(公告)日：2014-12-04

申请号：US14462216

申请日：2014-08-18

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Neil Mammen ,  Ashley Penna ,  Ajit Ninan

IPC: F21V14/00 ,  G09G3/34 ,  F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0001 ,  F21V14/003 ,  G02F1/1323 ,  G02F1/1326 ,  G02F1/133603 ,  G02F1/133606 ,  G02F1/19 ,  G02F2203/62 ,  G09G3/3406 ,  G09G3/342 ,  G09G2320/0233 ,  G09G2320/0626 ,  G09G2360/16

Abstract: Techniques for using variable flower assemblies to control light leakage between designated portions of light-emitting elements are provided. In some embodiments, a variable flower assembly comprises a plurality of light-transmissive segments each may be electronically set to a different light-transparency level. The variable flower assembly substantially forms a tube around a light-emitting element mounted on a first plane. A first edge of each of the light-transmissive segments collectively surrounds the light-emitting element on a second plane substantially parallel to the first plane. A second opposing edge of each of the light-transmissive segments collectively forms an opening of the tube. In some embodiments, a reflective assembly which reflectance level is electronically controllable may surround the variable flower assembly.

Abstract translation: 提供了使用可变花组件来控制发光元件的指定部分之间的光泄漏的技术。 在一些实施例中，可变花组件包括多个透光段，每个透光段可以电子地设置为不同的光透明度水平。 可变花组件基本上在安装在第一平面上的发光元件周围形成管。 每个透光段的第一边缘在基本上平行于第一平面的第二平面上共同围绕发光元件。 每个透光段的第二相对边缘共同形成管的开口。 在一些实施例中，反射层级可电子控制的反射组件可围绕可变花组件。

公开(公告)号：US20140307011A1

公开(公告)日：2014-10-16

申请号：US14356944

申请日：2012-11-07

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Ajit Ninan ,  Qifan Huang ,  Greg Maturi ,  Neil Mammen ,  James Kronrod

IPC: G06F1/32 ,  G09G3/36

CPC classification number: G06F1/3265 ,  G09G3/2074 ,  G09G3/342 ,  G09G3/36 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2330/025

Abstract: Techniques are provided to provide various pulse width modulation (PWM) schemes to embodiments of dual modulator display systems that may comprise a backlight of individually addressable and controllable light emitters. The backlight provides illumination to a light modulator for further conditioning of the light to be presented to a viewer. The backlight may be striped and each stripe is assigned a PWM scheme that effectively increases the bit depth of the controller for each stripe. The display system may allow a better matching of PWM periods to LCD frame rates to reduce visual artifacts. In another embodiment, the display system may detect a small bright feature to be rendered in the image data and, with a pre-assignment of light emitters to different partitions, the backlight controller may drive a subset of the light emitters according to the partitions.

Abstract translation: 提供了技术来向双调制器显示系统的实施例提供各种脉冲宽度调制（PWM）方案，所述双调制器显示系统可以包括单独可寻址和可控光发射器的背光。 背光为光调制器提供照明，用于进一步调节要呈现给观看者的光。 背光可以是条纹的，并且每个条带被分配有PWM方案，其有效地增加每个条带的控制器的位深度。 显示系统可以允许PWM周期与LCD帧速率的更好匹配以减少视觉伪影。 在另一个实施例中，显示系统可以检测要在图像数据中渲染的小的亮特征，并且通过将光发射器预先分配到不同的分区，背光控制器可以根据分区来驱动发光体的子集。

公开(公告)号：US20140293392A1

公开(公告)日：2014-10-02

申请号：US14304123

申请日：2014-06-13

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Ajit Ninan ,  Scott Daly

IPC: G02B26/08

CPC classification number: F21K9/64 ,  B82Y20/00 ,  F21V9/08 ,  G02B26/08 ,  G02B27/2207 ,  G02B27/2264 ,  G09G3/001 ,  G09G3/003 ,  G09G3/02 ,  G09G3/025 ,  G09G3/22 ,  G09G3/34 ,  G09G5/14 ,  G09G2310/0235 ,  H04N9/3129

Abstract: Techniques for extracting light from a light guide are described. In some embodiments, a light source comprises a light guide configured to trap first light through total internal reflection. The light source may further comprise a plurality of light extractors configured to extract at least a portion of the first light upon establishing optical contact with the light guide. The light source is configured to control individual light extractors in the plurality of light extractors to make optical contact with the light guide. Quantum dots may be used with the light source to regenerate light, within desired frequency band, from the at least a portion of the first light.

Abstract translation: 描述从光导提取光的技术。 在一些实施例中，光源包括被配置为通过全内反射来捕获第一光的光导。 光源还可以包括多个光提取器，其配置成在与光导体建立光学接触时提取第一光的至少一部分。 光源被配置为控制多个光提取器中的各个光提取器以与光导光学接触。 量子点可以与光源一起使用，以在期望的频带内从第一光的至少一部分再生光。

公开(公告)号：US08508617B2

公开(公告)日：2013-08-13

申请号：US13675643

申请日：2012-11-13

Applicant: Dolby Laboratories Licensing Corporation

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

IPC: H04N9/73 ,  H04N3/14 ,  H04N5/46 ,  G06K9/40 ,  G06K9/00

CPC classification number: G06T9/00 ,  H04N9/67 ,  H04N9/77

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.