Although some photos will make you feel Galaxy S4 The screen of the Galaxy S4 is "deep blue" or "moving green", but Samsung has made great efforts to display the color of the Galaxy S4. However, if you don't adjust the color mode (most people who have used S3 know that the color mode is adjustable), you will miss the "accurate" color restoration on S4. However, if your eyes have been spoiled by the "heavy makeup" on screen A, please ignore the following.
1、 Picture comparison
First of all, the contrast machine, iPhone 5 and HTC one, whose screens are basically current in our understanding color The best performance.
2、 Instrument test
First, bring S4 of the preset color mode to the flag.
OK， You can see that the blue color has basically gone to 120%. Do you think the blue color is deep? Besides, the color temperature also reaches the average value of 7300K.
However, just make the following comparison:
HTC one
The blue ratio higher than S4 and the color temperature of 8000K mean that New one is "bluer" than the preset color mode of S4
By comparison, the iPhone 5 is much better
The color temperature of 110% blue and 7300K is the least blue of the three.
However, if we stop here, this article will be meaningless. Next, we will put the data of different display modes of S4:
In Adobe RGB mode, S4's blue color is less than 110%, and its color temperature is only about 7250K, which is better than IP5. In the movie mode, the three colors are almost 100%, and the color temperature is close to 6500K. It can be considered that it achieves accurate color restoration and white display at the same time.
Maybe some engine oil noticed that there is a pink curve in the above figure. What is it?
polular science: This reflects the Delta E value. Delta E is mostly used in color plate making printing, and a small part is used to measure the color deviation of digital cameras, scanners and printers. The vast majority of color measurement depends on instruments and computers to complete, mainly detecting the color and standard deviation under CIELAB architecture. Delta-E is also often used to describe the smallest difference in color and hue that can be perceived by the human eye. We know that due to technology, ink, paper and other factors, there must be differences between the printed original and the copy. Delta-E can regulate what people can tolerate within their perception. In general, it is acceptable for Delta-E to change from 3 to 6.
1.6-3.2 : When viewed from a certain distance, there is basically no difference in color, which is usually considered as the same color;
3.2-6.5 : The difference of color is visible, but the impression of color is basically the same;
6.5-13 : Color difference can be seen, but can be considered as the same tone;
13-25 : It is considered as different colors. If it exceeds this value, it is considered as different colors.
According to this standard, the Delta E value of S4 in adobe RGB and movie modes is better than IP5 and ONE.
B: Next is Gamma:
The average measured value of HTC is - 2.16, IP5 is - 2.14, GS4 is+2.44, and the optimal gamma value of smart phone screen is 2.2
C: Gamut
From the figure, we can see that the color gamut of S4 standard mode and Adobe RGB mode is very high, while the color gamut of movie mode is not so wide. In conjunction with the previous white balance test, we recommend that you use the movie mode, so that you can get the softest and less saturated colors under the most correct white balance. Next, look at the color gamut of HTC ONE on the iPhone 5.
We can see that the color gamut of HTC just covers the standard sRGB color gamut, but HTC ONE is blue on the white balance. The iPhone 5 shows a purple shift in the blue color (blue is purple), but its white balance is better than HTC ONE. The following picture shows the comparison between S4 and the other two mobile phones in movie mode:
3、 Problems with S4 screen:
Put a group of pictures first
It is possible to find out carefully that the screen turns green when S4 is observed at the deflection angle (about 30 degrees). This is probably related to the change of the screen sub-pixel arrangement. But HTC ONE is blue
4、 Summary
In general, Samsung has made great efforts to restore the color of S4 screen. S4's color restoration and white display in Adobe RGB and movie modes have eliminated the iPhone 5 and One as the contrast, completely turning over. However, the greenness of this declination observation still shows that Samsung's Amoled technology There is still room for improvement.
Relevant statements:
1. The pictures and data of this article are all from the Russian website hi-tech.mail.ru. The original address is: 。 Address of original translation text: The basis of the above discussion is to assume that the data is true.
2. The brightness of all screens in this test is set at 285 nits, so there is no "different brightness" scenario (more scientific than the unified maximum brightness setting).
3. The white standard in this test is D65 (6500K).
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