Display Standard - Veritas et Visus

More documents

Recommendations

Info

Veritas et Visus Display Standard February 2009 There is substantial crowding above 40% of maximum signal intensity, but note that on this 1000:1 logarithmic scale the diameter of the round data points corresponds to a 6% shift in luminance. Figure 7: Magnified view of Figure 6 near peak luminance and signal intensity This figure enlarges the portion of Figure 6 at high peak luminance and signal intensity in order to show the significant differences between the transfer functions on a magnified scale so they are easier to see. Note the significant convex curvature for the Samsung unit, which begins with a lower gamma of 2.00 between 100 and 80% signal, and then steepens significantly to 2.38 between 80 and 60% signal. The Sharp unit has the opposite concave curvature with its gamma shifting downward from 2.33 for 100 to 75% signal to 2.16 between 75 to 50% signal. Referring back to Figure 6 the Sharp transfer function then steepens significantly between 40 and 25% signal with a very high gamma of 3.25 before returning back to significant concave below 20% signal. These variations in the transfer functions affect not only the picture’s gray scale and contrast, but also the resulting hue and saturation for all color mixtures, because the individual R,G,B intensities simultaneously dip into different portions of the transfer function. 72
Veritas et Visus Display Standard February 2009 Primary chromaticities: Figures 8 to 11 plot the 1976 CIE Uniform Chromaticity Diagrams for the red, green and blue primary colors for each unit. They are compared to the HDTV ITU-R BT.709 standard primary colors, which are commonly referred to as Rec.709. Figure 8 (left image): 1976 CIE Uniform Chromaticity Diagram for the Sony KDL-52XBR4 unit; Figure 9 (right image): 1976 CIE Uniform Chromaticity Diagram for the Samsung LN-T5281F unit 73 Source: DisplayMate Technologies and Insight Media The chromaticity diagram for Sony XBR unit is essentially a perfect match to the HDTV Rec.709 standard. The chromaticity diagram for the Samsung unit is excellent in green and blue but is significantly red deficient. This was obvious in the viewing tests as well. Figure 10 (left image): 1976 CIE Uniform Chromaticity Diagram for the Sharp LC-52D92U unit; Figure 11 (right image): 1976 CIE Uniform Chromaticity Diagram for the LG 42LC5DC hospitality unit Source: DisplayMate Technologies and Insight Media
Page 1 and 2:
Display Standard Veritas et Visus F
Page 3 and 4:
Veritas et Visus Display Standard F
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22: Veritas et Visus Display Standard F
Page 71: Veritas et Visus Display Standard F
show all

Display Standard - Veritas et Visus

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?