Exploring the AMOLED display of our new smartphone
Today, we finally caught an engineer who is testing hardware for future smartphones. They pressed him to the wall and tortured him. He said that he was currently testing the AMOLED display and was ready to share his test results with readers.
Below are the results of testing the AMOLED display, which we are going to use in our new smartphone and which we have never encountered before, or rather, tried to avoid them. But this instance hooked us, so we decided to test it.
Brief information about the display:
For the sake of curiosity, we took a picture of the matrix:
In order to prevent the measurement results from affecting the display brightness, depending on the ambient light, automatic adjustment was turned off and the maximum brightness was set.
Let's move on to the actual measurements. The color gamut on this display is much wider than the standard sRGB:
Marketers usually present this as a virtue, however, almost all graphic materials (drawings, photographs, films) are designed for standard color gamut. Therefore, on screens with a wide color gamut, colors can look very saturated. However, it is already a matter of taste - maybe someone likes it.
It can be noted that there are certain deviations in the white balance, the average error is dE = 10.04, and the maximum is 13.6. The measurement data are presented in the table below: The
maximum brightness of white is about 365 cd / m2, which is very good. At least the display reads well in bright sunlight. The minimum brightness is 16.2 cd / m2. By the way, the Samsung Galaxy Tab 7.7 with Super AMOLED Plus display has correspondingthe parameters are 183 cd / m2 and 33 cd / m2, although perhaps such a comparison is not entirely correct.
The distribution of colors on the gray scale is shown in the figure below:
As with many displays, here one cannot but note the predominance of blue over the entire range of the gray scale. Ideally, all three colors should be in the region of 100%. With green and red everything is more or less in order - deviations of 5% - 7%. Deviations in blue reach + 30%.
Test data on a gray scale:
Average error dE = 16.34, maximum - 28.22. It is pointless to talk about the contrast of AMOLED displays, except that it is very high - due to the fact that at a minimum brightness of white the screen is completely black (not a single OLED diode is lit).
Gamma Graph:
The display has a slightly non-linear character of this parameter. The average value is 2.07, which is slightly lower than the typical value 2.2, which is desirable to have in the entire range of the gray scale. Below is a graph of the color temperature of the display:
The color temperature in almost the entire range lies within 8000K. The average color temperature is 7904K, i.e. there is a shift to cold tones, due to an excess of blue.
In the settings of the smartphone screen, it is possible to choose the tonality of the display of graphic information. Considering that the default is neutral tone, and cold tones prevail in the display settings, we will choose a warm tone and look at the changes in the parameters.
The color gamut zone did not visually change and is still wider than the sRGB zone:
However, if you look at the measurement table, you can see that the average color temperature is 6054K, which is closer to the typical value of 6500K. The maximum brightness of white has not changed and amounts to 362 cd / m2.
If we now look at the distribution of colors on the gray scale, we can note that the predominance of blue almost leveled. Moreover, red color began to prevail a little. In general, the distribution of colors became uniform throughout the range, and the average value of dE decreased to 2.16.
Gamma became more uniform and its average value of 2.17 came close to the coveted value of 2.2.
Almost the same can be said about the color temperature, which became slightly lower than 6500K due to the slight predominance of red.
In general, in terms of performance, the display left a good impression. The undoubted advantages include the following:
Bright, rich colors, high image clarity at almost any viewing angle and good readability of the display in bright sunshine. High contrast and the ability to adjust brightness in a wide range, both in automatic and in manual mode. Moreover, the minimum brightness value in automatic mode can be set by the user himself. Practically correct factory settings for white balance and the ability to adjust it by the user.
PS They took the smartphone c AMOLED-screen and compared it with IPS. During the comparison, they interviewed colleagues and came to the conclusion that amoled initially seems more attractive in terms of color saturation, but there were also ardent IPS supporters who, with foam at the mouth, argued that the display can only be IPS! Later we took a few more photos, on which the difference is almost invisible)
I would like to ask you which displays you prefer and why - write about this in the comments. Thank!
Below are the results of testing the AMOLED display, which we are going to use in our new smartphone and which we have never encountered before, or rather, tried to avoid them. But this instance hooked us, so we decided to test it.
Brief information about the display:
For the sake of curiosity, we took a picture of the matrix:
In order to prevent the measurement results from affecting the display brightness, depending on the ambient light, automatic adjustment was turned off and the maximum brightness was set.
Let's move on to the actual measurements. The color gamut on this display is much wider than the standard sRGB:
Marketers usually present this as a virtue, however, almost all graphic materials (drawings, photographs, films) are designed for standard color gamut. Therefore, on screens with a wide color gamut, colors can look very saturated. However, it is already a matter of taste - maybe someone likes it.
It can be noted that there are certain deviations in the white balance, the average error is dE = 10.04, and the maximum is 13.6. The measurement data are presented in the table below: The
maximum brightness of white is about 365 cd / m2, which is very good. At least the display reads well in bright sunlight. The minimum brightness is 16.2 cd / m2. By the way, the Samsung Galaxy Tab 7.7 with Super AMOLED Plus display has correspondingthe parameters are 183 cd / m2 and 33 cd / m2, although perhaps such a comparison is not entirely correct.
The distribution of colors on the gray scale is shown in the figure below:
As with many displays, here one cannot but note the predominance of blue over the entire range of the gray scale. Ideally, all three colors should be in the region of 100%. With green and red everything is more or less in order - deviations of 5% - 7%. Deviations in blue reach + 30%.
Test data on a gray scale:
Average error dE = 16.34, maximum - 28.22. It is pointless to talk about the contrast of AMOLED displays, except that it is very high - due to the fact that at a minimum brightness of white the screen is completely black (not a single OLED diode is lit).
Gamma Graph:
The display has a slightly non-linear character of this parameter. The average value is 2.07, which is slightly lower than the typical value 2.2, which is desirable to have in the entire range of the gray scale. Below is a graph of the color temperature of the display:
The color temperature in almost the entire range lies within 8000K. The average color temperature is 7904K, i.e. there is a shift to cold tones, due to an excess of blue.
In the settings of the smartphone screen, it is possible to choose the tonality of the display of graphic information. Considering that the default is neutral tone, and cold tones prevail in the display settings, we will choose a warm tone and look at the changes in the parameters.
The color gamut zone did not visually change and is still wider than the sRGB zone:
However, if you look at the measurement table, you can see that the average color temperature is 6054K, which is closer to the typical value of 6500K. The maximum brightness of white has not changed and amounts to 362 cd / m2.
If we now look at the distribution of colors on the gray scale, we can note that the predominance of blue almost leveled. Moreover, red color began to prevail a little. In general, the distribution of colors became uniform throughout the range, and the average value of dE decreased to 2.16.
Gamma became more uniform and its average value of 2.17 came close to the coveted value of 2.2.
Almost the same can be said about the color temperature, which became slightly lower than 6500K due to the slight predominance of red.
In general, in terms of performance, the display left a good impression. The undoubted advantages include the following:
Bright, rich colors, high image clarity at almost any viewing angle and good readability of the display in bright sunshine. High contrast and the ability to adjust brightness in a wide range, both in automatic and in manual mode. Moreover, the minimum brightness value in automatic mode can be set by the user himself. Practically correct factory settings for white balance and the ability to adjust it by the user.
PS They took the smartphone c AMOLED-screen and compared it with IPS. During the comparison, they interviewed colleagues and came to the conclusion that amoled initially seems more attractive in terms of color saturation, but there were also ardent IPS supporters who, with foam at the mouth, argued that the display can only be IPS! Later we took a few more photos, on which the difference is almost invisible)
I would like to ask you which displays you prefer and why - write about this in the comments. Thank!
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