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DLP4710

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DLPS056B – NOVEMBER 2014 – REVISED JULY 2016

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Typical Application (continued)

8.2.2 Detailed Design Procedure

For connecting together the two DLPC3439 controllers, the DLPA3000/DLPA3005, and the DLP4710 DMD, see

the reference design schematic. When a circuit board layout is created from this schematic a very small circuit

board is possible. An example small board layout is included in the reference design data base. Layout

guidelines should be followed to achieve a reliable projector.

The optical engine that has the LED packages and the DMD mounted to it is typically supplied by an optical

OEM who specializes in designing optics for DLP projectors.

8.2.3 Application Curve

As the LED currents that are driven time-sequentially through the red, green, and blue LEDs are increased, the

brightness of the projector increases. This increase is somewhat non-linear, and the curve for typical white

screen lumens changes with LED currents is as shown in Figure 21. For the LED currents shown, it’s assumed

that the same current amplitude is applied to the red, green, and blue LEDs.

SPACE

Figure 21. Luminance vs Current