Sony G90 manual Convergence Labs Test Report Greg Rogers

formats can be selected directly from the remote

control. The entire 100 picture formats can be

selected by an on-screen menu that shows the

memory number, name, video source and date

created. When a memory is selected the source

is switched and the display is setup with all of

the individualized calibration settings for that picture. The

memories can be copied, moved, deleted and renamed for

selection convenience or to expedite creating new entries.

Although 100 memory set-ups may seem like overkill, 10-

20 wouldn’t be enough for me. You will need separate memo-

ries for 4:3, 4:3 letterboxed, and 16.9 enhanced aspect ratios,

and I have special set-ups for 1.66:1 and 1.85:1 movies. Most

of these are duplicated again for a doubler, tripler, quad, com-

posite video, S-Video, and my 3Dfusion progressive-scan DVD

player that has a 72 frame-per-second output. Then add 720p

and 1080i for HDTV and several set-ups for computer dis-

plays. Finally I have some special picture formats for watch-

ing 4:3 sports presentations cropped and expanded to fill the

entire 1.85 screen. You may also want to keep a duplicate set

of everything just in case you accidentally mess something up

while tweaking.

Each memory has a counter and a timer to keep track of

how many times it is used and for how many hours. This is

convenient for knowing how much time you’ve used the CRTs

for watching 4:3 pictures or widescreen pictures. Two sets of

timers, one that can be reset by the user, are also included for

total CRT and projector hours.

Color temperature can be selected from 3200K, 5400K,

6500K, 7500K, and 9500K for special applications. Incoming

Convergence Labs Test Report Greg Rogers

ccurate color reproduction depends on how well the Aprojector’s red, green, and blue primary colors match the SMPTE C standard phosphors, combined with the accuracy of the white-point color temperature. The projector’s white point has been calibrated to match the D65 standard white-point at 75 IRE. The projector’s primary and complimen- tary (yellow, magenta, cyan) colors (circles) are compared to the SMPTE C standard colors (squares) on the CIE diagram. Changes in the grayscale color temperature will shift the posi-

tion of the complimentary colors and the color accuracy.

the white point slightly toward red during calibration, the resulting color accuracy will be significantly improved with bet- ter skin-tones and more accurate purples. The eye is more sen- sitive to errors in blues and purples than it is to equal distance errors in yellow or cyan on the CIE diagram.

The Runco DTV-930 RGB color triangle almost completely overlaps the SMPTE triangle so nearly all colors in the video signal can be reproduced. The blue and green primary colors are close to the SMPTE standard phosphors and the red pri- mary is shifted to the right. The resulting color accuracy is excellent.

The green primary of the Sony VPH-G90U is shifted toward yellow. This results in a gap of non-reproducible colors between its RGB color triangle and the SMPTE C triangle. The cyan color is desaturated (shifted toward white) and magenta is shifted toward blue.

If the VPH-G90U color temperature is lowered by moving