DLPC3433 datasheet(36/62 Pages) TI1

36 / 62 page

DLPC3433, DLPC3438

DLPS035B – FEBRUARY 2014 – REVISED JANUARY 2016

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Since the R, G, and B channels can be gained up by CAIC inside the DLPC343x, 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 19 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 19. CAIC Power Reduction Mode (for Constant Brightness)

8.3.7 Local Area Brightness Boost

Local area brightness boost (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 get no gain, the overall perceived brightness of the image is boosted.

Figure 20 shows a split screen example of the impact of the LABB algorithm for an image that includes dark

areas.

Figure 20. Boosting Brightness in Local Areas of an Image

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DLPC3433 Datasheet(PDF) 36 Page - Texas Instruments