DLPC3479 datasheet(36/61 Pages) TI1

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DLPC3479

DLPS112 – JUNE 2018

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Since the R, G, and B channels can be gained up by CAIC inside the DLPC3479, the LED power can be turned

down for any color channel until the brightness of the color on the screen is unchanged. Thus, CAIC can achieve

an overall LED power reduction while maintaining the same overall image brightness as if CAIC was not used.

Figure 18 shows an example of LED power reduction by CAIC for an image where the R and B LEDs can be

turned down in power.

CAIC can alternatively be used to increase the overall brightness of an image while holding the total power for all

LEDs constant. In summary, when CAIC is enabled CAIC can operate in one of two distinct modes:

•

Power Reduction Mode – holds overall image brightness constant while reducing LED power

•

Enhanced Brightness Mode – holds overall LED power constant while enhancing image brightness

Figure 18. CAIC Power Reduction Mode (for Constant Brightness)

8.3.8 Local Area Brightness Boost (LABB)

LABB is an image processing algorithm that adaptively gains up regions of an image that are dim relative to the

average picture level. Some regions of the image will have significant gain applied, and some regions will have

little or no gain applied. LABB evaluates images frame by frame and derives the local area gains to be used

uniquely for each image. Since many images have a net overall boost in gain even if some parts of the image

receive no gain, the overall perceived brightness of the image is boosted.

Figure 19 shows a split screen example of the impact of the LABB algorithm for an image that includes dark

areas.

Figure 19. Boosting Brightness in Local Areas of an Image

DLPC3479 Datasheet(PDF) 36 Page - Texas Instruments