JAJSHL3E February 2014 – November 2020 DLPC3433 , DLPC3438
PRODUCTION DATA
A Pico projector is created by using a DLP chipset comprised of DLP3010 (.3 720p) DMD, DLPC34xx controller and DLPAxxxx PMIC/LED driver. The DLPC34xx does the digital image processing, the DLPAxxxx provides the needed analog functions for the projector, and DMD is the display device for producing the projected image.
In addition to the three DLP chips in the chipset, other chips may be needed. At a minimum a flash part is needed to store the software and firmware to control the DLPC34xx.
The illumination light 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.
To receive images, connect the DLPC34xx controller to the host processor using the parallel (or potentially DSI) interface. To send commands to the controller, connect it to the host processor using the I2C interface.
The only required power supplies that are external to the projector system chipset are the battery (SYSPWR) and possibly a regulated 1.8-V supply (some TI PMICs generate the 1.8-V supply but the DLPA200x does not).
The entire pico-projector can be turned on and off by using a single signal called PROJ_ON. When PROJ_ON is high, the projector turns on and begins displaying images. When PROJ_ON is set low, the projector turns off and draws just microamps of current on SYSPWR. If 1.8 V is supplied separately from the PMIC (as is the case with the DLPA200x), when PROJ_ON is set low, the 1.8-V supply can continue to be left at 1.8 V and used by other non-projector sections of the product.