Vivitek D950HD Video Projector Review
The Vivitek D950HD is one of a few 1080p home theater projectors out now that cost less than a grand.
Color temperature stayed steady throughout the spectrum of light and dark. You may see some slight wavering off the center line, but the minor bumps do not breach the allowable error for human perception. In other words, you won't see any tinting of your picture at any level of brightness.
These three graphs of the primary colors represent the brightness produced by the Vivitek D950HD matched against a given brightness input. All three lines should increase in unison along a curved line that reaches from 0 to 100% brightness without any nadirs or peaking.
What we see in the chart is pretty close to this ideal. Each of the three lines is very smooth and more or less coincidental. This tells us that the entire spectrum of colors is used, that each increase in color brightness is evenly incremental, and that each of the primary colors follows these guidelines.
The Rec. 709 is the international standard for HD colors. We recorded the colors from the Vivitek D950HD and matched them up against this standard and found this projector lacking. The green and blue values are significantly undersaturated. We adjusted the colors to retain some accuracy in the red values because they were so oversaturated, at the loss of green and blue accuracy. There is no even middle ground. We could make adjustments to make all the colors incorrect, but we went with this calibration instead because it had the least overall error.
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