Table of Contents
Projectors
Conclusion was that JVC and Panasonic had similar TF response and 10-bit luminance steps, but that the Panasonic had slightly better color gamut and color linearity as well as more input types and probably higher overall luminance output. Sanyo had poor TF response. Sony does not have 10 bit luminance.
JVC DLA-X70
Tested on 2/17/2012. Basic specification is very similar to the previous model X7. The biggest difference is that it has blue/green edge problem but it isn't very much notable as X7 had red color edge problem. PC:DVI port → DVI-VGA cable → VGA:projector.
Spectrum of RGB KW CMY
Gamma for each color channel measured separately:
Associated xy values:
Gray levels calibration:
HITACHI SX-1350
Tested on 2/16/2012. It has blue/green edge problem. Black/White contrast is not sharp as JVC projectors.
Spectrum of RGB KW CMY
Associated xy values:
Gamma for each color channel measured separately:
Gray levels calibration:
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SANYO LP-XM100
Tested on 4/21/2011(Thus).
spectrum and 10 bit gamma test was fine for VGA and DVI-D but high refresh rate test was disappointed,
tested VGA port which connects to computer DVI port with DVI-I → VGA cable
Spectrum of RGB KW CMY
Gamma for each color channel measured separately:
Associated xy values:
Gray levels calibration:
tested DVI-D port which connect with computer DVI port with DVI-D cable Spectrum of RGB KW CMY
Gamma for each color channel measured separately:
Associated xy values:
Gray levels calibration:
Temporal Frequency Test
VGA 800×600 60Hz
30Hz
Panasonic PT-DW8300
Tested on 3/8/2011(Tue).
We tested it using display port - VGA 10bit converter with 800×600 resolution at 60HZ. The matlab calibration file, which can be displayed by moncalib is here.
Spectrum of RGB KW CMY
Gamma for each color channel measured separately:
Associated xy values:
Gray levels calibration:
Temporal Frequency Test
VGA 800×600 60Hz
VGA 800×600 75Hz
EPSON EB1775W
Tested on 3/7/2011(Tue).
We tested with 800×600 resolution at 60HZ. The matlab calibration file, which can be displayed by moncalib is
here.
Spectrum of RGB KW CMY
Gamma for each color channel measured separately:
Gray levels calibration:
Temporal Frequency Test
HDMI 800×600 60Hz
VGA 800×600 60Hz
VGA 800×600 85Hz
VGA 800×600 90Hz
VGA 800×600 96Hz
JVC DLA-X7
Tested on 2/7/2011. We first tested the HDMI inputs, but things were a bit funky. Each color channel saturated at the top output, and the test for a 12 bit gamma table came up with garbage (i.e. no increase in luminance as we stepped the luminance in the gamma table in steps of 1/4096). Also the yellow value does not appear to be on the line connecting green and red. The luminance saturation was ok with the VGA input, although the output does not seem to reach quite the same maximum luminance. The temporal frequency of the monitor can be set to 85Hz, but the display tested with a photodiode does not seem to refresh that fast - in fact, if you flicker the screen there seems to be a high duty cycle in which the screen is bright for longer than expected. This is very clear at 60Hz and if you flicker at 30Hz it is almost but not completely gone (i.e. the display appears bright for longer than 33.3 and dark for less than 33.3 ms. The transitions are very fast though.
HDMI calibration 1
We tested with 1024×768 resolution at 60HZ bitDepth=32. The matlab calibration file, which can be displayed by moncalib is here. (Load into matlab and then run moncalib(calib)).
Spectrum of RGB KW CMY
Associated xy values:
Gamma for each color channel measured separately:
Gray levels calibration:
HDMI calibration 2
We did a second spectrum measurement and a bittest with the same monitor parameters (1024×768 60Hz 32bits HDMI input). Matlab calibration is here Spectrum of RGB KW CMY
Associated xy values:
Gray levels calibration:
VGA calibration 3
We did a final spectrum and gamma correction using the VGA input with display parameters set to 800×600 85Hz 32bit (also a bittest - but this should fail since the apple DP→VGA converter is only 8 bit). Matlab calibration is here. Note that the output does not saturate at high values.
Spectrum of RGB KW CMY
Temporal frequency test
800×600 85Hz
800×600 60Hz
800×600 60Hz Flicker every other frame for 30Hz
Notes
JVC D-ILA projectors. Model DLA-HD950 can do 85Hz at 1024×768 (see Instruction manual costs about $8000. There are also some display modes called MAC13“, MAC16”, and MAC19“ (Mac specific?) THe top is 1024×768 and clocks just under 75Hz.
DLA-X9 has no manual so there is no info on what display modes are driveable.
Note that “Clear motion drive” is an interpolation technology that creates 120Hz from 60Hz by interpolating the other image.
Navitar Supported models. Buhl is now owned by Navitar.
Distance from back of magnet room to center of magnet is 4 m 25 cm.
To calculate lens focal length in mm:
Projector distance x LCD Size
-----------------------------
Screen Size
LCD size for JVC is apparently 0.7”, so we have:
4250 x 17.78
------------ = 302.26mm Focal Length
250
Sometimes these are listed as throw ratios, which is the distance to the screen divided by the width of the screen
4250 ---- = 17 Throw Ratio 250
Panasonic makes some 3-chip DLP projectors, but they are expensive $30,000 and up. They do have fast refresh rates up to 120Hz 1024×768 for projector PT-DW8300U.
No longer available.
Sharp XGP610X 3-chip DLP is around $10,000 can do very fast refresh rates, up to 200Hz with 800×600> 1024×768 at 120Hz…There is also XG-P560W which appears similar but not as bright - not sure exactly what the difference is. A review for XG-P560W.
CRT & LCD monitor
CRT monitors
Dell Trinitron
Monitor specs:
CRT 21“
Color Graphic Display: P1130
100~240V 50-60Hz 2.0-1.0A
We have two monitors with the above specs (one is a spare):
| label | notes | DS/N (printed on white label) | DP/N (printed on white label) | Serial Number (printed directly on product) | Manufactured |
| “PE” | the one in use | JP-06D256-47743-24M-505Q | 06D256 | 5007464 | April 2002 |
| “SUNDIAL” | the spare | JP-06D256-47743-24M-503G | 06D256 | 5007388 | April 2002 |
Calibration [measured 2011.04.22, outdated]
Spectrum of RGB KW CMY
Gamma for each color channel measured separately:
Associated xy values:
Gray levels calibration:
DVI-VGA 60Hz
75Hz
Projector in the MRI Room
For experiments conducted before 2011 July 27, a projector owned by the CBM Team was used to present stimuli to subjects. (The boxy, ivory one.)
LCD projector: Avotec Inc. Silent Vision 6011 (SV-6011) Documentation
Goggle systems in the MRI Room
CBM Team also owns two goggle systems, one from which we got the infrared eye tracking system.
Old goggle: Avotec Inc. Silent Vision 4021 (SV-4021), no documentation found online as of 2012 Mar 21.
New goggle: Avotec Inc. Silent Vision 7021 (SV-7021) Documentation
- Fiber optic glasses, binocular goggle system with independent inputs to each eye.
Eye tracker used with SV-7021 is probably Real Eye 4601/4621 (RE-4601) Documentation