4.1.2 Illumination
This page allows the DMD controller to introduce additional enable delay, disable delay, and fall margin to the
LED illumination transition states. Though not always required, some LEDs or applications may require this
additional delay for power budget optimization, more precise LED on/off timing, calibration, dimming, or other
LED driver related countermeasures. To prioritize brightness, the delays should be disabled or kept as short as
possible.
Figure 4-2. DLP Composer - Illumination
4.1.3 Sequence Set
The sequence sets determine the frame rate and duty cycle partition of each RGB color. The recommended
frame rate is 25 Hz. Ideally, the duty cycle of the three color (red, green, and blue) would be split equally at 33%
each; however, a larger green duty cycle is recommended to achieve a higher brightness output.
Figure 4-3. DLP Composer - Sequence Set
The TI created project will include two sequences: baseline and high brightness. TI recommends using the
baseline sequence for optimal color, and only using the high brightness sequence to maximize the lumens
output.
The duty cycling of each color is made possible through the use of a multiplexer with active channel selection
by the PWM_SEL_0 and PWM_SEL_1 pins of the FPGA. This, in combination with the overall LED driver, PWM
Software
16
DLP3021LEQ1EVM Evaluation Module
DLPU106A – MARCH 2021 – REVISED OCTOBER 2021
Copyright © 2021 Texas Instruments Incorporated