Dell U4025QW UltraSharp 40 Curved Thunderbolt Hub Monitor - Users Guide - Page 11

Eye Comfort 3.0 Requirements and Star Rating Scheme for Monitors, Category, Test item

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Eye Comfort 3.0 Requirements and Star Rating Scheme for Monitors Category Eye Care Ambient Light Management Test item 3-star TÜV Hardware LBL Low Blue Light Category III (≤50%) or Software LBL solution¹ Flicker Free TÜV Flicker Reduced or TÜV Flicker Free Ambient Light Sensor No sensor performance Intelligent CCT No control Intelligent Luminance No control Star Rating Scheme 4-star 5-star TÜV Hardware LBL Category II (≤35%) or Category I (≤20%) TÜV Hardware LBL Category II (≤35%) or Category I (≤20%) TÜV Flicker Reduced Flicker Free or TÜV Flicker Free No sensor Ambient light sensor No Yes No Yes Refresh Rate ≥60Hz ≥75Hz ≥120Hz Luminance uniformity Luminance uniformity ≥ 75% Image quality Eye Comfort User Guide Remark Color Uniformity Freedom of movement Gamma difference Wide color gamut2 Color uniformity Δu'v' ≤ 0.02 Luminance changes shall decrease less than 50%; The colour shift shall be less than 0.01 Gamma difference ≤ Gamma difference Gamma difference ±0.2 ≤ ±0.2 ≤ ±0.2 DCI-P35 Min. 95% (CIE 1976) & NTSC3 Min.72% (CIE sRGB4 Min.95% sRGB4 Min.95% (CIE 1931) or sRGB4 Min (CIE 1931) or 1931) 95% (CIE 1931) Adobe RGB6 Min.95% (CIE 1931) & sRGB4 Min.95% (CIE 1931) User guide Yes Yes Yes ¹ Software controls the blue light emission by reducing excessive blue light, resulting in a more yellow tone. 2 Color gamut describes the availability of colors in the display. Various standards were developed for specific purposes. 100% corresponds to the full color space as defined in the standard. 3 NTSC stands for National Television Standards Committee, which developed a color space for the television system that is used in the United States. 4 sRGB is a standard red, green, and blue color space that is in use on monitors, printers, and the World Wide Web. 5 DCI-P3, short for Digital Cinema Initiatives - Protocol 3, is a color space used in digital cinema that encompasses a wider range of colors than the standard RGB color space. 6 Adobe RGB is a color space created by Adobe Systems that encompasses a broader range of colors than the standard RGB color model, particularly in the cyans and greens. About your monitor | 11

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About your monitor
|
11
Eye Comfort 3.0 Requirements and Star Rating Scheme for Monitors
Category
Test item
Star Rating Scheme
3-star
4-star
5-star
Eye Care
Low Blue Light
TÜV Hardware LBL
Category III (≤50%)
or Software LBL
solution¹
TÜV Hardware LBL
Category II (≤35%)
or Category I
(≤20%)
TÜV Hardware LBL
Category II (≤35%) or
Category I (≤20%)
Flicker Free
TÜV Flicker Reduced
or TÜV Flicker Free
TÜV Flicker Reduced
or TÜV Flicker Free
Flicker Free
Ambient Light
Management
Ambient Light Sensor
performance
No sensor
No sensor
Ambient light sensor
Intelligent CCT
control
No
No
Yes
Intelligent Luminance
control
No
No
Yes
Image quality
Refresh Rate
≥60Hz
≥75Hz
≥120Hz
Luminance uniformity
Luminance uniformity ≥ 75%
Color Uniformity
Color uniformity Δu’v’ ≤ 0.02
Freedom of
movement
Luminance changes shall decrease less than 50%;
The colour shift shall be less than 0.01
Gamma difference
Gamma difference ≤
±0.2
Gamma difference
≤ ±0.2
Gamma difference
≤ ±0.2
Wide color gamut
2
NTSC
3
Min.72% (CIE
1931) or sRGB
4
Min
95% (CIE 1931)
sRGB
4
Min.95% (CIE
1931)
DCI-P3
5
Min.
95% (CIE 1976) &
sRGB
4
Min.95%
(CIE 1931) or
Adobe RGB
6
 Min.95%
(CIE 1931) & sRGB
4
Min.95% (CIE 1931)
Eye Comfort
User Guide
User guide
Yes
Yes
Yes
Remark
¹ Software controls the blue light emission by reducing excessive blue light, resulting in a
more yellow tone.
2
Color gamut describes the availability of colors in the display. Various standards were
developed for specific purposes. 100% corresponds to the full color space as defined in
the standard.
3
NTSC stands for National Television Standards Committee, which developed a color
space for the television system that is used in the United States.
4
sRGB is a standard red, green, and blue color space that is in use on monitors, printers,
and the World Wide Web.
5
DCI-P3, short for Digital Cinema Initiatives - Protocol 3, is a color space used in digital
cinema that encompasses a wider range of colors than the standard RGB color space.
6
Adobe RGB is a color space created by Adobe Systems that encompasses a broader
range of colors than the standard RGB color model, particularly in the cyans and greens.