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A Solid Multimedia Notebook From HP

Display Brightness, Contrast And Uniformity, Continued

Toshiba Qosmio G25 spatial uniformity of brightness plot.

Sony VAIO VGN-T350P spatial uniformity of brightness plot.

HP Pavilion DV4000 spatial uniformity of brightness plot.

Display Brightness, Contrast And Uniformity Conclusions

If you're looking for great brightness and high contrast, look no further than the Toshiba Qosmio G25. At an average maximum brightness of 335 it runs circles around both the Sony T350P and the HP DV4000. The G25 exhibits brightness levels found on flat screen TV sets. Its contrast level is also in the flat screen TV class.

In spite of the G25's super brightness and contrast, the Sony T350P and the HP DV4000 both have enough contrast (especially the Sony) and brightness to make them very good choices for home and office applications and DVD viewing both in the house and outside in deeper shade. With its very good 3D graphics capabilities, the DV4000 is also well suited to gaming applications.

Now take a look at the plots of spatial uniformity of brightness and the Spatial Uniformity of Brightness chart for the G25, T350P and DV4000. Notice the correspondence between the chart and the plots. For example, based on its plot the G25 has the best spatial uniformity of brightness; it has the most even distribution of brightness across the 64 squares. It also has the best (lowest) spatial uniformity of brightness score. Next best based on both its plot and score is the T350P. Notice how the DV4000's plot and score supports its third place finish among this set of portable computers.

For the record here are the raw standard deviation scores for the three computers: G25 13.2; T350P 7.7; DV 7.5. You can see how the standard deviation scores do not accurately reflect the real spatial uniformity of brightness of the three computers.