Epson Home Cinema 3700 Projector - Calibration & Settings

Epson Home Cinema 3700 Calibration Presets notes

Eric's notes:

I preformed 2 calibrations on the 3700, one for a dark room using Cinema mode (medium lamp) and a brighter day mode using Bright Cinema (bright lamp). Overall calibration went as expected, except there was one issue I observed with the color red when calibrating it using the projectors CMS controls. We normally calibrate the 6 colors using 100% saturation test patterns and try to put the colors at their correct (REC 709) x y coordinates and at their proper 100% luminance levels.

If you look at either the before or after CIE charts you will see 100% red (outer dot) is a little under saturated and pushing towards yellow/green, while 80, 60, 40 & 20% are all over saturated and pulling towards magenta/blue. As I tried to move 100% red to its x y (box) it caused 80, 60, 40 & 20% to all move even further towards magenta/blue turning red more to pink. So, 100% red was slightly orange and 80 and below was pinkish. Now most of the content we watch is not at 100% levels so I only made a small adjustment to red, otherwise skin tones would become too pink. I hoping this issue is only with this 3700 sample.

I was able to achieve outstanding white balance and near perfect 2.40 gamma curve in Cinema mode. Bright Cinema is designed of course to be bright and one way they achieve this is to have a very bright gamma curve, 1.56 in this case. As I tried to lower the gamma to my target of 2.10 it lowered the peak white down too much, similar to what we got out of Cinema Mode thus losing any benefit of a brighter mode. So, I only lowered the gamma to 1.87 to keep the overall light output up.

Lumen Output and Color Temp at 100 IRE (mid zoom and Medium lamp):
Dynamic	3119@6704K
Bright Cinema	2286@7039K
Natural	2008@6918K
Cinema	2052@6505K

Lumen Output and Color Temp at 100 IRE Dynamic Mode (mid zoom and Eco lamp):
2128@6702K
This equates to a 32% drop off in lumen output vs high bulb.
(3119 high vs 2128 low)

This chart is repeated from the Performance page

Pre-Calibration (Various Modes) - Color Temp over IRE range
	Cinema Mode (Med. Lamp, Mid Zoom)	Bright Cinema Mode (Bright Lamp, Mid Zoom)
30 IRE	6729K	6887K
50 IRE	6860K	6943K
80 IRE	6978K	7057K
100 IRE	6918K	7039K
	Average Gamma = 2.37	Average Gamma = 1.60

Epson HC3700 Pre- and Post-Calibration Settings and Image Enhancement, By Mode

Cinema Mode

Epson HC3700 Pre- and Post-Calibration for Cinema Mode (Medium Lamp & Mid Zoom)
	Pre-Calibration	Post-Calibration
Color Temp	5 (1-10)	5 (1-10)
Skin Tone	3 (1-10)	3 (1-10)
Gamma	0	-1
Super White	Off	Off
Contrast	50	48
Brightness	50	50
Color	50	50
Tint	50	53
Auto Iris	High Speed	High Speed
Sharpness (standard)	5	5
Thin Line / Thick Line	5 / 5	5 / 5

Epson HC3700 Pre- and Post-Cal Image Enhancement for Cinema Mode
	Pre-cal Image Enhancement	Post-cal Image Enhancement
Image Preset Mode	2 (1-5)	2 (1-5)
Noise Reduction	1 (1-3)	0 (1-3)
Mpeg Noise Reduction	1 (1-3)	0 (1-3)
Super Resolution - Fine Line	2 (1-20)	12 (1-20)
Super Resolution - Soft Focus Detail	2 (1-20)	12 (1-20)
Detail Enhancement	20 (1-100)	20 (1-100)

Bright Cinema Mode:

Epson HC3700 Pre- and Post-Calibration for Bright Cinema Mode
	Pre-Calibration	Post-Calibration
Color Temp	5 (1-10)	4 (1-10)
Skin Tone	3 (1-10)	3 (1-10)
Gamma	0	-2
Super White	Off	Off
Contrast	50	50
Brightness	50	50
Color	50	50
Tint	50	53
Auto Iris	High Speed	High Speed
Sharpness (standard)	5	5
Thin Line / Thick Line	5 / 5	5 / 5

Epson HC3700 Pre- and Post-Cal Image Enhancement for Bright Cinema Mode
	Pre-cal Image Enhancement	Post-cal Image Enhancement
Image Preset Mode	3 (1-5)	2 (1-5)
Noise Reduction	7 (1-3)	0 (1-3)
Mpeg Noise Reduction	1 (1-3)	0 (1-3)
Super Resolution - Fine Line	5 (1-20)	12 (1-20)
Super Resolution - Soft Focus Detail	5 (1-20)	12 (1-20)
Detail Enhancement	30 (1-100)	20 (1-100)

Grayscale Calibration (RGB Balance)

HC3700 Custom Custom color temp w/ 5 starting point
Gain	Red = 39
	Green = 51
	Blue = 48
Offset	Red = 49
	Green = 50
	Blue = 50

HC3700 Bright Cinema Mode Custom color temp w/ 4 starting point
Gain	Red = 41
	Green = 50
	Blue = 42
Bias	Red = 50
	Green = 52
	Blue = 51

HC3700 Cinema Mode Pre-Calibration Charts

Epson Home Cinema 3700 Cinema Mode Pre-Calibration CIE 1976 Saturation Sweeps (target BT.709)

Epson Home Cinema 3700 Cinema Mode Pre-Calibration RGB Balance / Grayscale Tracking (target D65)

Epson Home Cinema 3700 Cinema Mode Pre-Calibration DeltaE 2000 (target below error of 3)

Epson Home Cinema 3700 Cinema Mode Pre-Calibration Gamma Log 2.37 Average Gamma (target 2.40)

Epson HC3700 Bright Cinema Mode Pre-Calibration Charts

Epson Home Cinema 3700 Bright Cinema Mode Pre-Calibration CIE 1976 Saturation Sweeps (target BT.709)

Epson Home Cinema 3700 Bright Cinema Pre-Calibration RGB Balance Grayscale Tracking (target D65)

Epson Home Cinema 3700 Bright Cinema Mode Pre-Calibration DeltaE 2000 (target below error of 3)

Epson Home Cinema 3700 Bright Cinema Mode Pre-Calibration Gamma Log 1.56 Average Gamma (target 2.10)

Post-Calibration Color Temperature

Color Temp over IRE Range (Post Calibration)
IRE	Cinema Mode	Bright Cinema
10	6798K	7571K
20	6610K	6335K
30	6388K	6332K
40	6439K	6354K
50	6437K	6421K
60	6508K	6471K
70	6466K	6494K
80	6465K	6516K
90	6507K	6495K
100 (White)	6449K & 1944 Lumens	6507K & 2231 Lumens
	Average Gamma = 2.37 (target 2.40)	Average Gamma = 1.87 (target 2.10)

Epson Home Cinema 3700 Projector Review - Performance

Epson Home Cinema 3700 - Advanced Calibration

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