Patent ID: 8576256
Filing Date: 2013-11-05
Classification: G09G,Y10S

Abstract:
1. A system, comprising one or more integrated circuits, wherein the one or more integrated circuits comprise: extraction logic configured to calculate a brightness metric of video image data; analysis logic configured to analyze the brightness metric to identify a subset of the video image data, wherein the subset of the video image data comprises spatially varying visual information in the video image data; intensity logic configured to determine an intensity setting of a light source based at least in part on a brightness setting of the light source and a first portion of the brightness metric of the subset of the video image data, wherein the light source is configured to illuminate a display that is configured to display a visual representation of the video image data; and a low-pass filter configured to filter a change in the intensity setting between adjacent video images in the video image data to limit changes in the intensity setting from image to image, and wherein, when filtering the change, the filter is configured to use a time constant from a plurality of time constants, each time constant corresponding to a range of magnitudes of a change in the intensity setting input to the filter by the intensity logic.