Requirement for graphic arts display
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1 Requirement for graphic arts display Content Development Division of National Digital Archives Program, Taiwan Date: 95/12/5 中島賢人 : Masato Nakashima Product Manager, Graphic Solutions Overseas Sales & Marketing Eizo Nanao Corporation
2 EIZO means IMAGE in Japanese EIZO is the dedicated company manufacturing display products for more than 30 years.
3 Installation Example Trading Room: UBS (Zurich)
4 Installation Example Network Control Center : Vodafone (The Netherlands)
5 Installation Example Reading Room: Sapporo Shinseiki Hospital (Japan)
6 Installation Example The President Room of White House : Washington (U.S.A)
7 Installation Example Photo Studio: The Photographer Mr.Douglas Dubler (U.S.A)
8 Installation Example News Paper Publisher: Emirates Today (U.A.E)
9 Requirement for graphic arts display Content Development Division of National Digital Archives Program, Taiwan Date: 95/12/5 中島賢人 : Masato Nakashima Product Manager, Graphic Solutions Overseas Sales & Marketing Eizo Nanao Corporation
10 LCD Monitor Characteristics Merit Space and energy saving Very flexible setting Flat surface No geometrical distortion No defocusing and convergence error Demerit Narrow color space Viewing angle dependency of contrast and color Lack-smoothness of gamma characteristics Defective and difficult color adjusting functions
11 For Perfect Color Management Monitor Required Features: 1. Smooth Tone Characteristics 2. Wide Color Gamut 3. Brightness & Color Uniformity 4. Brightness & Color Stability 5. Accurate Additive Color Mixture 6. Wide Viewing Angle 7. Hardware Calibration Capability
12 1.Smooth and Adjustable Gamma Original Image Distorted Image If the tone characteristics (gamma curve) of monitor per each color (R,G,B) vary, the picture looks different from the original.
13 1.Smooth and Adjustable Gamma Eizo ColorEdge Series 12-Bit LUT in EIZO original LCD controller built-in the monitor Factory adjustment for all 256 steps for each RGB Each monitor has correct gamma characteristics
14 1.Smooth and Adjustable Gamma Grayscale Display (Tone characteristics) Factory calibrated monitor (e.g. Eizo Monitors) enables smooth grayscale display. General Monitors has obvious coloring and bandings in its grayscale display. Single unit calibration as factory preset minimizes deviation between per each.
15 1023 OUTPUT Especially in the dark tone area needs smaller increment for accurate color reproduction. 16-bit Color Processing INPUT 16-bit: tone 14-bit: tone 10-bit:1024 tone CG221 CG211 4 Times CG210 CE240W CE210W 16 Times CG19 CG21(Dcn) CG18(Dcn)
16 2.Wide Color Gamut AdobeRGB LCD Center view Side view (80 degree) Same Color Space as CRT Reference: Adobe RGB Eizo CG221, LCD Eizo CG211, CRT Eizo High-end 21 CRT T966 Less Dependent of Angles
17 srgb Blue 2.Wide Color Gamut There is few monitors which can cover 100% srgb gamut regardless LCD/CRT. Company A 23 Eizo CG21(discontinued) srgb:eizo CG210,211
18 2.Wide Color Gamut Mapping means color space compression. The gap between srgb and monitor s Blue coordinate makes blue color turn reddish by color mapping. General Monitors Before After NG General Monitor CG211 CG210 Mapping image
19 AdobeRGB 2.Wide Color Gamut srgb is not enough for perfect softproof to show saturated Cyan, Yellow and Magenta printed on a paper. next page LCD srgb AdobeRGB Reference: Adobe RGB Eizo CG221, LCD Eizo CG19
20 2.Wide Color Gamut Gamut Comparison with ISO Coated Paper srgb: Traditional LCD/CRT Monitor AdobeRGB Large part of colors around Cyan cannot be reproduced perfectly. Large part of colors Colors around Yellow cannot be reproduced perfectly. ISO coated paper color gamut is supported. Reference: Adobe RGB Eizo CG221
21 2.Wide Color Gamut srgb - General LCD Monitors - AdobeRGB Saturated color especially Cyan and Yellow is compressed. Deep tone color around Cyan and Yellow is displayed.
22 1.Wide Color Gamut Reference monitor for AdobeRGB formatted picture data. AdobeRGB is a market standard for high-end digital camera and scanner though there is no capable monitor to show the image with original colors. Feasible monitor for softproof. Consistent Color Reproduction. ISO coated, SWOP, Japan color, Euroscale color gamut is covered. AdobeRGB color gamut can increase efficiency of color management enormously.
23 3.Brightness & Color Uniformity Screen uniformity can easily effect critical color work.
24 3.Brightness & Color Uniformity Actual Screen Uniformity Eab Max 7.21, Ave 2.48 This is a usual case there are validation of color and brightness on an entire screen
25 3.Brightness & Color Uniformity Screen Uniformity Eizo w/t DUE Eizo w/o DUE Company A 23 Average ΔE=1.0 ΔE=2.5 ΔE=3.5 Maximum ΔE=3.5 ΔE=6.0 ΔE=7.4 At 5000K, Video Level 255 * DUE: Digital Uniformity Equalizer function *The above value is based on Eizo own test
26 Digital Uniformity Equalizer New uniformity compensation process at EIZO factory production line Both brightness & chromaticity are adjusted at 425 points in an entire screen. Compensations are made on various grayscale levels Brightness uniformity compensation Chromaticity uniformity compensation
27 Measurement example Color uniformity is now delta E 1 to 2 or below at each grayscale level 255 step 128 step 64 step Before After E scale
28 Brightness Stability General LCD and CRT Monitor 4.Brightness Stability Brightness Transition Eizo Monitors Normally it takes 1, 2 h Eizo Patented Technology Eizo Backlight Control System It takes less than a half hour Backlight sensor Monitor Back
29 Chromaticity Stability 4.Brightness Stability Normal w/t Eizo brightness stabilizer xy Color Coordinates Change xy Color Coordinates Change Color Coordinates x y Time [min.] Color Coordinates x y Time [min.]
30 5.Accurate Additive Color Mixture R+G+B = W Not happen on most LCDs ColorEdge has very good characteristics like CRTs
31 TFT Liquid Crystal Mode Amorphous Silicon TFT Twisted Nematic (TN) Vertically Aligned (VA) In Plane Switching (IPS) Multi-Domain Vertical Alignment (MVA) Patterned Vertical Alignment (PVA) Advanced Super View (ASV) In Plane Switching Super In Plane Switching or Dual Domain In Plane Switching TN+Film VA IPS
32 Failure of Additive Mixture Eizo CG211 S-IPS Company SH: 18, ASV Company SH: 19.6, TN 150% 240% 230% 150% 140% 220% 210% 140% W / ( R+G+B ) 130% 120% 110% 100% 100% is accurate color. W/ ( R+G+B ) 200% 190% 180% 170% 160% 150% 140% 130% 120% 110% W / ( R+G+B ) 130% 120% 110% 100% 90% Video Level 100% 90% Video Level 90% Video Level Company SM: 19, PVA Company SH: 16, TN Vertical value is how close to accurate color. 100% is accurate color. W / ( R+G+B ) 150% 140% 130% 120% W / ( R+G+B ) 150% 140% 130% 120% 110% 110% equation: Y=W/(R+G+B) 100% 100% 90% Video Level 90% Video Level
33 6.Wide Viewing Angle Even the specification state 170 degree viewing angle, color looks washed out from the side on general LCD monitors. ColorEdge has very good viewing angle with very little color shift with S-IPS technology LCD panel
34 Brightness(%) % % 80.00% 60.00% 40.00% 20.00% 0.00% Horizontal View Angle-Brightness View Angle Tone characteristics from side view is almost same than that from center view. H-Viewing Angle Characteristics VA Brightness(%) % % 80.00% 60.00% 40.00% 20.00% 0.00% S-IPS Ratio Of Brightness HORIZONTAL VIEW ANGLE-RATIO OF BRIGHTNESS Horizontal View Angle-Brightness View Angle View Angle TN+Film Tone characteristics from side view is different than that from center view.
35 V-Viewing Angle Characteristics Vertical View Angle-Brightness 比率 VERTICAL VIEW ANGLE-RATIO OF BRIGHTNESS % % S-IPS % ) % ( s s e n 60.00% t h i g r B 40.00% s e n t h ig r B f O t io a R % % Vartical View Angle-Brightness 比率グラフ View Angle View Angle % Tone characteristics from side view is almost same than that from center view. VA ) % ( s s e n t h ig r B % 80.00% 60.00% 40.00% 20.00% 0.00% View Angle TN+Film Tone characteristics from side view is different than that from center view.
36 7.Hardware Calibration Capability Achievable Points by Monitor Calibration 1. Accurate Viewing Adjustment Brightness Color Temperature Gamma Value 2. Color Matching with Other Devices Point: Monitor gets accurate color. Every user gets same result.
37 General Monitor + Calibration software Changes graphics card s property Most video cards have 8-bit capability Some color tones get missing during the process. Hardware Calibration Monitor Changes monitor s property ColorEdge has 12-bit LUT inside
38 12-bit steps 16 times more than 8-bit General Monitors 8-bit: 16.7 million colors R: 256, G: 256, B: ^3 = 16,777,216 8-bit with software calibration Some tonality breakups Eizo ColorEdge: 8-bit from 12-bit LUT 16.7 million colors from 4.4 billion color pallets R: 4,096, G: 4,096, B: 4,096 4,096^3 = 68,719,476, bit with hardware calibration Very smooth gradation
39 Perfect Color Management Monitor Required Features: 1. Smooth Tone characteristics 2. Wide Color Gamut 3. Brightness & Color Uniformity 4. Brightness & Color Stability 5. Accurate Additive Color Mixture 6. Wide Viewing Angle 7. Hardware Calibration Capability
40 International softproof standard ISO is now officially DIS (Draft of International Standard). TÜV Rheinland will start Fogra certification ready as a monitor certification system based on the new standard. Eizo joined establishment of the standard and may obtain 1st certification in the beginning of year * Fogra certification ready Logo mark has not been decided.
41 Eizo ColorEdge Series
42 Reference Information: Monitor Technology Today & Tomorrow
43 Is LCD best for graphics use?
44 Plasma Display Panel PDP Lights is created by prospers excited by plasma discharge Pros: Wide viewing angle, response time, color saturation Cons: DPI, large screen only, ambient light reflection, after image Applications: TV
45 SED Surface-conduction Electron-emitter Display Very small CRTs are aligned Developed by Canon & Toshiba, Production in 2007 Pros: Wide viewing angle, black level, response time, color saturation Cons: DPI, large screen only, production cost Applications: TV
46 OLED Organic Light Emitting Diode LED in which emissive layer is organic compound Metal (Mg Ag) Cathode Electrode Organic EL Poly-Si TFT ITO Anode Electrode Grass Substrate Pros: Wide viewing angle, black level, response time, color saturation, thinner than LCD Cons: Longevity, small screen only Applications: Cell phone, PDA
47 Comparison CRT LCD PDP OLED SED Color gamut Moving image process Viewing angle Black level / Contrast DPI Longevity Power consumption Production cost Typical screen sizes ~ 36" ~ 65" 37" ~ 100" ~ 15" 36" ~ 55" Typical applications Computer monitor, TV Mobile phone, PDA, Computer monitor, TV TV Mobile phone, PDA TV
48 END Thank you very much for your attention.
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