Pattern Sequence Mode; Sequence Settings - Texas Instruments DLP LightCrafter 4500 User Manual

Pattern Sequence Mode

For the Parallel RGB and FPD-link video input modes, the DLPC350 interprets channel A as green,
channel B as red, and channel C as blue. However, the Parallel RGB or FPD-link source can have
different mapping of channels to colors. The Input Source Port Data Swap section sets the mapping of
channels to colors. Port1 refers to Parallel RGB interface while Port2 refers to the FPD-link interface. The
mapping options are:
ABC → ABC, no swapping of data subchannels
•
• ABC → CAB, data subchannels are right-shifted and circularly rotated
• ABC → BCA, data subchannels are left-shifted and circularly rotated
• ABC → ACB, data subchannels B and C are swapped
• ABC → BAC, data subchannels A and B are swapped
• ABC → CBA, data subchannels A and C are swapped
For all video input modes, the Display Dimensions section defines the active displayed resolution. The
maximum supported input and output resolutions for the DLP4500 0.45 WXGA DMD are 1280 pixels
(columns) by 800 lines (rows). The display area settings set the first pixel column (Start Pixel) and the first
line (Start Line) as well as, the numbers of pixels per line (total columns) and the number of lines per
frame (total rows). This setting also provides the option to define a subset of active input frame data using
pixel (column) and line (row) counts. In other words, this feature allows cropping of the source image as
the first step in the processing chain.
For the Parallel RGB and FPD-link video input modes, the Video Signal Information section provides
details about the video source connected to the LightCrafter4500. These signal parameters can only be
read from the device, they cannot be set in the section.
The Signal Status parameter has the following states:
• Processing: The video source VSYNC signal has not yet locked when the Get Video Info button was
pressed
• Detected: The video source VSYNC signal has been locked
• Stopped: The LightCrafter4500 is no longer locking to the video source. This occurs in the Pattern
Sequence modes when video port input pattern streaming is selected. This prevents a delay in pattern
display if synchronization is temporarily lost with the video source.
• Lock Failed: The LightCrafter4500 was not able to lock to the incoming video source. Please see
sections 6.7 and 6.8 in the DLPC350 datasheet on Input Pixel Interface Timing Requirements to verify
the video input is meeting specifications.
3.3 Pattern Sequence Mode
When the DLP LightCrafter 4500 is configured in Pattern Sequence mode, the DLPC350 supports 1-, 2-,
3-, 4-, 5-, 6-, 7-, and 8-bit images with a 912 columns × 1140 rows resolution. These images are pixel
accurate, meaning that each pixel corresponds to a micromirror on the DMD and is not processed by any
of the video processing functions. Three subtabs control the Pattern Sequence settings: Sequence
Settings, Pattern Sequence Start/Stop/Pause, Trigger Controls, and LED Delay Control.

3.3.1 Sequence Settings

A pattern sequence is composed of several patterns loaded from flash memory or streamed through the
24-bit RGB video port. Each individual pattern can have a specific set of LEDs illuminating it, a particular
bit-depth, and an internal or external trigger. The Sequence Settings subtab lets the user define and set all
the Individual Pattern Settings. The Trigger Controls subtab and the LED Delay Control subtab set the
trigger and LED enable edge timings, respectively. The Pattern Sequence Start/Stop/Pause tab shows the
pattern sequence validation status indicators and allows the user to play, pause and stop the
sequence.Figure 3-5
30
Operating the DLP LightCrafter 4500
shows the DLP LightCrafter 4500 GUI with the Pattern Sequence tab selected.
Copyright © 2013–2015, Texas Instruments Incorporated
DLPU011E – July 2013 – Revised September 2015
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