Pattern Sequences; Pattern Sequence Background; Relationship Between Bit-Planes And 24-Bit Rgb Images; Bit Partition - Texas Instruments DLP LightCrafter 4500 User Manual

This chapter describes the pattern sequences supported by the DLP LightCrafter 4500 module.
4.1

Pattern Sequence Background

The DLPC350 takes as input 24-, 27-, or 30-bit RGB data at a frame rate of up to 120-Hz. This frame rate
is composed of three colors (red, green, and blue) with each color equally divided in the 120-Hz frame
rate. Thus, a 2.78-ms time slot is allocated to each color. Because each color has 8-, 9-, or 10-bit depth,
each color time slot is further divided into bit-planes. A bit-plane is just a 1-bit representation of all the
pixels in the image. For example, a 24-bit image is decomposed into its bit-planes in
Figure 4-1. Relationship Between Bit-Planes and 24-bit RGB Images
The length of each bit-plane in the time slot is weighted by the corresponding power of 2 of its binary
representation. This provides a binary pulse-width modulation of the image. For example, a 24-bit RGB
input has three colors with 8-bit depth each. Each color time slot is divided into eight bit-planes, with the
sum of all bit-planes in the time slot equal to 256.
46

Pattern Sequences

Figure 4-2
Figure 4-2. Bit Partition
Copyright © 2013–2015, Texas Instruments Incorporated
DLPU011E – July 2013 – Revised September 2015
Pattern Sequences
Figure
shows this partition of bits in a frame.
DLPU011E – July 2013 – Revised September 2015
Submit Documentation Feedback
Chapter 4
4-1.