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JVC DLA-RS4910 Projector Review - Calibration and Settings

Posted on April 16, 2014 by 

On this page we will repeat some of the measurements taken by Mike when he calibrated the projector.  That way, on this page, you  have both the calibration settings we used, and the effect they have on the JVC DLA-RS4910 projector’s measurements.

At the bottom are some of Mike’s comments from measuring and calibrating the DLA-RS4910 projector.

JVC DLA-RS4910 Color Temperature

Lumen Output and Color Temp at 100 IRE (mid zoom):
Cinema 1235 @ 6427
Natural 1205 @ 6421
Stage 1285 @ 6812
Animation 1285 @ 6811
User 1-4 1205 @ 6240

Lumen Output (Low Lamp, Animation mode): 843

Color Temp over IRE Range, Best mode (Pre calibration)
Cinema (User and Natural are very similar)
30 IRE 6272
50 IRE 6360
80 IRE 6454
100 IRE 6427
JVC DLA-RS4910U Pre-calibration - Settings for measurements (default values are in parenthesis):
Cinema Natural Stage Animation User 1-4
 Contrast=(0) -1 -1 -1 -2 -1
 Brightness=(0) 1 1 2 4 1
 Color Sat.=(0) (0) (0) (0) (0) (0)
 Tint = (0) (0) (0) (0) (0) (0)
 Color Temp = (6500) (6500) (7000) (7000) (6500)
Gamma = (Grad. Priority) (Normal) (Bright Priority) (Cont. Priority) (Normal)
Color Profile = (Cinema) (Standard) (Stage) (Animation) (Standard)
Lens Aperature = (Auto 2) (Auto 1) (Auto 2) (Auto 2) (Manual - fully open)

Lamp Mode=High (unless noted otherwise).

All other settings at default (untouched)

Color Temp over IRE Range (Post calibration):
20 IRE 6440
30 IRE 6428
40 IRE 6559
50 IRE 6426
60 IRE 6455
70 IRE 6486
80 IRE 6495
90 IRE 6461
100 IRE 6467
 Average gamma = 2.22
Effect of zoom on lumen output (Animation mode):
Zoom out 1388
Mid-zoom 1285
Zoom in 1132


Effect of Lens Aperture setting on lumen output (Animation mode):
0 (maximum opening) 1285
-7 (half open) 974
-15 (minimum opening) 633
Calibration settings for User 1:
User 1, Custom Color Temp 1 w/ 6500 starting point
Gain (0)NOTE: Gain can only be adjusted down R = 0
G = 0
B = -3
Offset (0) R = -4
G = -6
B = 7
 Lumens at 100 IRE: 1235 @ 6467

NOTE: Gamma on Custom1 – 2.4 starting point, Color Profile on Standard, Brightness on 5

Mike's Performance Notes

This is the brightest JVC projector to date, far exceeding the previously reviewed X35 and X55.  It is equally bright in all modes, with only a 6% drop from Stage or Animation modes to Natural or User modes.  Like previous JVC projectors, grayscale is decent right out of the box in Cinema, User or Natural modes.  Also typical of JVC projectors, gamma was too low in the Normal preset, averaging right around 2.0.  Going to the Custom gamma allows for an average gamma of 2.2 or higher

Mike's Grayscale Calibration Notes

Grayscale calibrated reasonably well, with an average Delta E of only 1.4 and nothing higher than 2.6.  The RGB balance was also good and other than a bump at 50 IRE, was consistent across the whole IRE range.  As with past JVC projectors, adjusting Gain has an effect on the total IRE range, whereas Offset has little effect on upper IREs.  So, if you adjust Gain, then compensate for the adjusted gain effect with Offset, it works out pretty good. 

Again, as with prior JVC projectors, I used the custom gamma of 2.4 to achieve an overall gamma of 2.2 or higher.  This results in a pretty smooth gamma with an average of 2.22.  Luminance tracking is quite good as well.  Using the 2.4 gamma setting tends to crush blacks a little, so increasing the Brightness setting to 5 is necessary.  This projector has some newly described gamma settings (as compared to past JVC projectors), but they appear to be similar to the previous A, B, C and D gamma settings.  

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