ViewSonic PJD-7828HDL Projector Review - Calibration Settings

December 18, 2017 / By Art Feierman

ViewSonic PJD-7828HDL Projector Review - Calibration Settings: Calibration Presets Notes, Best Mode Calibration

ViewSonic PJD-7828HDL Calibration Presets Notes

Note: The projector had over 43 Hours on the bulb before I calibrated it and took the light measurements. A brand-new bulb may have slightly higher measured lumens.

ViewSonic has included 5 picture preset modes (Brightest, Dynamic, Standard, Movie & ViewMatch sRGB) on the PJD7828HDL. For my Best (dark room) calibration I used Movie mode with lamp set to eco. In all modes the projector clipped whites around 232 which is actually a little better than some recent projectors I have calibrated. Lowering contrast did nothing to help raise the peak white to 235. In a perfect world I would like it to be able to resolve out to 238-240.

Best Mode Calibration for 1080p and REC709 – Movie Mode

ViewSonic PJD7828HDL Movie Mode Post-Calibration RGB Balance / Grayscale Tracking (target D65)
ViewSonic PJD7828HDL Movie Mode Post-Calibration RGB Balance / Grayscale Tracking (target D65)

There is not a lot to write about in regards to calibration on the PJD7828HDL because simply ViewSonic gives us little in the way of picture controls to adjust. Believe it or not you can’t even adjust color, tint and sharpness when feeding video from an HDMI source. This reminds me of the old days when many DLP projectors were 768p (1366x768). When feeding them certain PC signals they would bypass the projectors internal color decoder, thus graying out color & tint in the user menu.

In addition to having no color, tint & sharpness controls the PJD7828HDL also omits any white balance adjustments (RGB gains/bias). In Movie mode I recommend changing color temp from neutral to normal as this helps remove the plus green you get with normal and raise brightness from 48 to 49-50. Leave the rest on their default settings which includes leaving Brilliant Color on 4 instead of turning it off as I often due with my best/dark room calibrations. Turning Brilliant Color off made the poor performing color gamut even worse.

I did not perform Bright room calibration on the PJD7828HDL. My recommendation would be set the lamp to normal. Put it in Standard mode, change color temp from neutral to normal, lower contrast from 5 to 1 and leave everything else on default.

ViewSonic PJD7828HDL Movie Mode Post-Calibration Gamma Log 2.30 Average Gamma (target 2.40)
ViewSonic PJD7828HDL Movie Mode Post-Calibration Gamma Log 2.30 Average Gamma (target 2.40)
IREPre-CalibrationPost-Calibration
10 IRE6995K6916K
20 IRE6682K6662K
30 IRE6625K6633K
40 IRE6836K6749K
50 IRE6522K6641K
60 IRE6640K6542K
70 IRE6347K6602K
80 IRE6577K6515K
90 IRE6484K6654K
100 IRE6502K6627K

Measurements taken at Mid-Zoom in Movie Mode.

Average Gamma Pre-Calibration: 2.28

Average Gamma Post-Calibration: 2.30 @ 1069 Lumens

My gamma target for best/dark room calibration was 2.4. The default setting of 3 showed an average gamma of 2.28 with the image getting a little brighter between 30-80IRE. Without any white balance controls there is really no way to improve this. However, by switching the color temp from neutral to normal helped a tiny bit showing a 2.30 average gamma. Before DeltaE ran from 5 at 100IRE and lowered to 1 on its way to 10IRE. After switching to normal color temp DeltaE improved from .5 to 1.5 except 70IRE at a 2. Not bad considering there is no white balance controls.

[sam_pro id=1_33 codes="true"]

TypePre-CalibrationPost-Calibration
Contrast44
Brightness4849
Colorn/an/a
Tintn/an/a
TypePre-CalibrationPost-Calibration
Gamma33
Brilliant Color44
Sharpnessn/an/a
Color TempNeutralNormal
RGBGainOffset
Redn/an/a
Greenn/an/a
Bluen/an/a

Greyscale calibration settings for Game mode.

ViewSonic PJD7828HDL Movie Mode Post-Calibration DeltaE 2000 (target below error of 3)
ViewSonic PJD7828HDL Movie Mode Post-Calibration DeltaE 2000 (target below error of 3)

Delta E is a metric for understanding how the human eye perceives color difference. The term delta comes from mathematics, meaning change in a variable or function. The suffix E references the German word Empfindung, which broadly means sensation. Simply put, look at Delta E as a measure of grayscale/color accuracy. 3 and under is considered ‘Excellent’ and imperceptible by the human eye.

[sam_pro id=1_68 codes="true"]

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