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David C. Hutchison, Texas Instruments, DLP

® 

Products 

This white paper will discuss Texas 

Instruments BrilliantColor™ technology. 

 

This technology uses innovations in image 
processing to improve the optical efficiency 
of DLP® projection systems while 
expanding the capability of current RGB 
color wheels.  BrilliantColor™ technology 
may also be combined with new color wheel 
designs that can expand beyond traditional 
3-color systems, enabling the utilization of 
wide color gamuts on DLP display systems.  
The combined effect is that the Original 
Equipment Manufacturer (OEM) now has 
the opportunity to provide a brighter display 
that utilizes a customized color gamut that is 
not available on competing technologies. 

 

Historically, most display devices would 

render a scene using the three primary 
colors, red, green, and blue.  The 
combination of these three colors allows one 
to display any color that is within the 
triangular region bounded by those three 
colors (reference Figure 1).  This limits 
available colors that can be displayed, 

 

 

making it difficult to display brilliant 
yellows and cyans that are commonly found 
in natural scenes. 

     The  color  gamuts typically found on all 
current consumer display systems trade off 
having a wide color gamut with brightness.  
One can increase the size of the color gamut 
by increasing the saturation of the primaries.  
Saturated primaries move the red, green, and 
blue points of the triangle closer to the edge 
of the visible color spectrum and cover a 
greater area of the visible color spectrum.  
Because the saturated primaries typically are 
not as bright, the use of saturated primaries 
reduces the overall brightness of white tones 
and saturated colors.  By adding yellow, 
cyan, and magenta colors to the rendering of 
the image, one can maintain bright white 
points while providing deeper red, green, 
and blue color points. 
     The  three  color gamut has been used 
quite successfully for the Cathode Ray Tube 
(CRT) color displays.  The first DLP® 
display systems also utilized a similar 
approach whereas the image is split into its 
red, green, and blue components for display 
on the digital micro-mirror device (DMD).   

There are several factors that affect the 

end brightness of the display in lamp based 
display systems.  A typical DLP® Display 
optical path is shown in Figure 2. 

 

 

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