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。