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<strong>Veritas</strong> <strong>et</strong> <strong>Visus</strong> <strong>Display</strong> <strong>Standard</strong> February 2009<br />
3M Vikuiti DBEF Technology: Film Solutions to Me<strong>et</strong> Tightening Energy <strong>Standard</strong>s<br />
3M Optical Systems, St Paul, Minnesota<br />
3M’s multilayer technology uses hundreds of layers that are under 100nm thick. It recycles light that would be<br />
absorbed by the LCD. For LCD TVs, on average a single she<strong>et</strong> of dual brightness enhancement film (DBEF)<br />
provides an increase in efficiency of 42%. It improves energy efficiency and uniformity while maintaining a bright<br />
picture and wide viewing angle. Furthermore the Vikuiti microreplication technology recycles off-axis light not<br />
normally useable to the viewer. Combining DBEF and Vikuiti produces a 68% improvement in LCD TVs (see<br />
graphic).<br />
The graphic on the right shows DBEF average power savings by screen size<br />
Image Quality Technology Issues using Emotional Image Quality Evaluation M<strong>et</strong>hod<br />
S.M. Lee, Samsung SDI, Seoul, South Korea<br />
Samsung SDI has developed a new evaluation m<strong>et</strong>hod using CIECAM02. Image quality factors using CIECAM02<br />
are color reproduction capability – by volume at QMh space; gamma by JCh space; gray level gradation; perceptual<br />
contrast range – by QMh space; viewing angle – by volume at QMh space; and color difference analysis for image<br />
– by ΔE by QMh space. For color reproduction capability, the new definition is color reproduction capability = the<br />
volume size of the CIECAM02 gamut (see illustration).<br />
It is possible to analyze in more d<strong>et</strong>ail the instability of the gray level (gradation) and color representation in all the<br />
signal range. It is possible to analyze the representation of very dark color. The change of the brightness and the<br />
hue can be estimated simultaneously. It is<br />
also possible to analyze in more d<strong>et</strong>ail the<br />
instability of the color representation in a<br />
low signal range, i.e. the reversal of a color<br />
or the representation of a specific one.<br />
Samsung says that CIECAM02 is a<br />
powerful tool, in terms of reflecting the<br />
human visual perception system and<br />
observation (environment) condition.<br />
CIECAM02 has various feasibility and<br />
development possibilities for the<br />
estimation and standardization of displays.<br />
44<br />
3D gamut visualization and comparison (QMh)
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