Local area brightness boost (LABB), part of the IntelliBright™ suite of advanced image processing algorithms, adaptively gains up regions of an image that are dim relative to the average picture level. The controller applies significant gain to some regions of the image, and applies little or no gain to other regions. The LABB algorithm evaluates images frame-by-frame and calculates the local area gains to be used for each image. Since many images have a net overall boost in gain, even if the controller applies no gain to some parts of the image, the controller boosts the overall perceived brightness of the image.
Figure 23 shows a split screen example of the impact of the LABB algorithm for an image that includes dark areas.
The LABB algorithm operates most effectively when ambient light conditions are used to help determine the decision about the strength of gains utilized. For this reason, it may be useful to include an ambient light sensor in the system design that is used to measure the display screen's reflected ambient light. This sensor can assist in dynamically controlling the LABB strength. Set the LABB gain higher for bright rooms to help overcome washed out images. Set the LABB gain lower in dark rooms to prevent overdriven pixel intensities in images.