Pattern Modes
40
DLPU028C – October 2014 – Revised November 2016
Copyright © 2014–2016, Texas Instruments Incorporated
Operating the DLP LightCrafter 6500 and 9000
3.6.6 Pattern Settings
To configure the output or input triggers click the
Pattern Settings
button as shown in
. Within
this panel, the user can select the output delays of Trigger 1 and 2 and the input delay for Trigger In 1 and
2. The output delays are from the start of the pattern on the DMD.
Trigger In 1 and 2 can be delayed to have a later affect from when the external device performed the
trigger. All signals can be inverted.
The LED controls can also be delayed. These delays are from the start of the pattern on the DMD.
Minimum LED Pulse Width control allows the system to have much higher pattern speeds. Input the
minimum LED Pulse Width specific to your illumination system to achieve higher pattern speeds through
illumination modulation. Illumination modulation occurs with 8-bit patterns at rates faster than 1031Hz, by
modulating the light source to shorten the shortest bits, therefore increasing the maximum pattern speed.
The LED_EN signals from the DLPC900 can be used to control the illumination modulation of the LEDs.
The
DMD Active Blocks
allows a subset of DMD blocks to be activated, while the mirrors in the non
selected blocks are set to the off state. See
for an example of using this mode. When
operating with a subset of DMD blocks, the
DMD Idle Mode should be enabled as often as possible
.
For example, whenever the system is idle, between exposures if the application allows for it, or when the
exposure pattern sequence is stopped. To enable the
DMD Idle Mode
, the pattern sequence must be
stopped. To restart the pattern sequence, the
DMD Idle Mode
must be disabled.
The
DMD Idle Mode
provides a 50/50 duty cycle across the entire DMD mirror array, where the mirrors
are flipped between the on and off states to optimize the performance of the mirrors.
Figure 3-11. Pattern Settings Panel