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DLP2000

DLPS078 – JULY 2017

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Typical Application (continued)

8.2.1 Design Requirements

A pico-projector is created by using a DLP chip set comprised of the DLP2000 DMD, a DLPC2607 controller, and

a DLPA1000 PMIC/LED driver. The DLPC2607 controller does the digital image processing, the DLPA1000

provides the needed analog functions for the projector, and the DLP2000 DMD is the display device producing

the projected image.

In addition to the three DLP chips in the chipset, other chips may be needed. This includes a Flash part needed

to store the software and firmware for controlling the DLPC2607 controller.

The illumination that is applied to the DMD is typically from red, green, and blue LEDs. These are often

contained in three separate packages, but sometimes more than one color of LED die may be in the same

package to reduce the overall size of the pico-projector.

When connecting the DLPC2607 controller to the multimedia front end to receive images, a parallel interface is

commands to the DLPC2607 controller and configure the DLPC2607 controller for different features.

8.2.2 Detailed Design Procedure

To connect the DLPC2607 controller, the DLPA1000, and the DLP2000 DMD, see the reference design

schematic. A small circuit board layout is possible when using this schematic. An example small board layout is

included in the reference design data base. Layout guidelines should be followed to achieve a reliable projector.

An optical OEM who specializes in designing optics for DLP projectors typically supplies the optical engine that

has the LED packages and the DMD mounted on it.

8.2.3 Application Curves

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 12. For the LED currents shown, it is assumed

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

Figure 12. Luminance vs Current