Toshiba's Thin-Frame, ClearFrame LCD Page 3

Color temperature (Movie Mode/Warm Color Temperature before / Preference Mode/Warm Color Temperature after calibration): 20-IRE: 9,892 K/7,672 K 30-IRE: 8,714 K/6,449 K 40-IRE: 8,582 K/6,340 K 50-IRE: 8,569 K/6,462 K 60-IRE: 8,504 K/6,535 K 70-IRE: 7,651 K/6,422 K 80-IRE: 8,090 K/6,482 K 90-IRE: 7,870 K/6,525 K 100-IRE: 8,225 K/6,556 K Brightness (100-IRE window): 37.3/35.0 ftL Primary Color Point Accuracy vs. SMPTE HD Standard

Color

Target X

Measured X

Target Y

Measured Y

Red

0.64

0.78

0.33

0.35

Green

0.30

0.22

0.60

0.72

Blue

0.15

0.12

0.06

0.02

The Toshiba's Movie picture preset delivered the most accurate color when its Warm color temperature preset was also selected. However, grayscale tracking was +/-2,214 degrees K of the 6,500 K standard from 30 to 100 IRE in that mode - a poor performance level. Adjustments made to the green and blue gain color temperature controls in the Preference settings improved grayscale tracking to +/-220 degrees K from 30 to 100 IRE, although a 20 IRE window showed a distinct bluish bias - something that could also be seen on regular programs. Color decoder tests revealed a -10 percent green and -5 percent red error on both the HDMI and component-video inputs. As compared to the SMPTE HD specification, the set's red, green, and blue color points showed relatively high oversaturation. The points could be adjusted using the Color Palette adjustment in the set's ColorMaster menu, however.

Overscan - the amount of picture area hidden behind the edges of the TV's screen - measured 0% for 1080i/p-format high-definition signals with the Native display mode active. The set displayed 1080i and 720p test patterns with full resolution on the HDMI inputs. They looked comparatively soft when viewed via component-video connections, however, with no detail visible in the highest-frequencies of both 1080i and 720p multiburst test patterns. No edge enhancement was visible via the HDMI inputs with the sharpness control set to minimum, although some could be seen on the component-video inputs under the same conditions. Screen uniformity was very good for an LCD TV, with picture contrast remaining solid at all viewing angles over a wide 45-degree arc. There was also no sign of tinting on black, white, and gray full-field test patterns. And screen brightness remained uniform all the way down to 0 IRE. At this level, the corners of the image looked slightly brighter than its center.

The Toshiba passed most of the tests contained on both the Silicon Optix HQV high-def and DVD test discs. In both cases, however, 2:3 pulldown processing was slow to kick in, causing moiré artifacts to briefly flicker on-screen in areas of fine detail when watching both 480i- and 1080i-format movies. The set's standard digital noise reduction setting worked well, helping to smooth out grainy images without reducing picture detail. Its MPEG noise reduction mode significantly softened pictures at the medium and high settings, however.

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