Why add a yellow panel?
To make a long story short – to improve color accuracy. Because of the way LCD technology works there can be a shortcoming of red and yellow in some images. This is related to the short-arc lamps which favor blue and green over yellow and red. Adding the yellow panel helps to bolster those colors in the image produced. (see the whitepaper for more on this) Here is a visual for you :
Side-by-side comparison of images projected with new 4LCD technology (left) and 3LCD technology (right)
This was a new one for me, so I thought I would pull out a tiny bit from the whitepaper I keep mentioning and share it with you here. Here’s the blurb :
Would it surprise you to know your eyes are not equally sensitive to all colors? The 1931 CIE chart shows exactly that, expressing human color sensitivity to 59% green (with some yellow added), 30% red, and 11% blue. The NTSC color television systems developed in the 1950s uses this exact same weighted system – 59G+30R+11B – to carry the signals from transmitter to home. [ source : Sanyo 4LCD whitepaper ]
Who Wants Perfect Color?
Not all users are super particular about color, but in some industries color is an integral part of their business. Here are a few examples of those to whom accurate color is an imperative :
- Packaging and industrial design
- Broadcast and post-production
- Medicine and diagnostics
- Computer-generated graphics and 3D
You can probably guess who color is so important to users in these markets. But as an example, here is another blurb from the whitepaper about the importance of color for users in the medical profession :
There are subtle color shading differences in everything from CAT scans and magnetic resonance imaging (MRI) displays to microphotography of cells and pharmaceutical compounds. Imaging systems that make use of reds and yellows to indicate heat or cell activity benefit from expanded color gamut spaces.
Blood and tissue analysis also requires expanded color gamut capacity in the yellow and red spectrum, particularly when diagnosing tumors or irregular cell structures, which may otherwise appear identical to healthy tissue in early stages of development.
What does it all mean to projector buyers who are not reliant on perfect color? Essentially, a projector with better color and more definition in gray areas. And technology marches on.
The Sanyo PLC-XP200L
The new Sanyo PLC-XP200L is an installation projector that features new 4LCD. It’s designed for large venues with a sun-like 7000 lumens of brightness and still maintains an impressive 2200:1 contrast ratio for it’s class. It also has a 3-year warranty. This projector does not include a lens which is common in installation projectors of this kind because it allows users flexibility in the installation.
Read more about 4LCD technology in this Sanyo 4LCD whitepaper.