I'm looking for a G2 (LS980 compatible) Kernel that has custom RGB adjustment support. Any suggestions?
schale01 said:
I'm looking for a G2 (LS980 compatible) Kernel that has custom RGB adjustment support. Any suggestions?
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Why would you? According to anandtech.com G2 has one of three most accurate displays of mobile devices, other two being iPhone 5S and HTC One. If you think your display is faulty and displays wrong colors probably you better buy another model
A kernel with RGB color control can be used in conjunction with programs like auto lux to enable night mode for low light situations.
HTC did it again but worse. Last year displays were different in color temperature but maintained similar contrast. This year the difference in display calibration is worse.
Before receiving my own unit, I tested 2 devices in the shops. The first one had worse contrast and too low gamma (less punchy brightness transition from dark to light tones). I was disappointed with the display (let's call it Type A).
Later on, I went to another shop and the display looked gorgeous. Higher contrast, accurate gamma and more neutral greyscales (let's call it type B).
Today I received my unit and unfortunately, the display was Type A display. Here are the results of the "poorer display". Unlike last year, it is not possible to determine the actual display ID by looking this up in the last_ksmg file in the proc folder under the root. The access is denied. So unless we root a device, we cannot determine the display ID.
As can be seen below, the color temperature and greyscale accuracy is mediocre. Contrast is only average. Chromaticity overall is good but red is oversaturated.
Brightness: 503cd/m²
True Contrast: 1,000:1
Dynamic Contrast: 1378:1
White Color Temperature: 7395°K
Average Color Temperature: 7417°K
Note that on this display, the i1 Dislay pro used by many press reviewers will overestimate color temperature by 5.5% on this particular display. So if you see values around 7900°K, this is broadly equivalent to the 7,400°K that I (and Anandtech) measured. UK Harware review probably also had a Type A display however the contrat values are likely due to methodology.
Although I haven't tested extensively, I can already tell that the dynamic brightness adjustment is still taking place, though it works differently v. last year's implementation. This is why the contrast values observed in the press reviews very widely between 980:1 and over 2300:1!
I will be measuring Type B displays in the shops to nail down the differences based on the same methodology (100% Voodoo Test patterns).
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Greyscale
Color Space
Currently available reviews for the HTC One Display pending
Tests in English
25.03.2013 BGR GSMArena: 567cd/m² Brightness | 1,256:1 Contrast
26.03.2013 USA Anandtech: 497cd/m² Brightness | 1,300:1 Contrast | 7,341 Color Temperature (Delta E = 5.2)| Chromaticity: excelllent (Delta E = 3.87)
20.03.2013 GBR pcpro: Brightness not mentioned | 1,687:1 Contrast (measured with i1 Display Pro)
14.03.2013 GBR uk.hardware.info: 508cd/m² Brightness | Black Level: 0.2cd/m² | 2,541:1 Contrast | 7,856K Color Temperature (measured with i1 Display Pro)
25.03.2013 USA laptopmag: 447cd/m² Brightness | Chromaticity: Good (Delta E = 6.1)
German
20.03.2013 DEU Computerbase.de: Not yet published DTP94)
04.04.2013 DEU PC Welt 454cd/m² brightness | 2,555:1 contrast
31.03.2013 DEU Chip.de: 482cd/m² brightness | 1420:1 contrast
02.04.2013 DEU notebookcheck.com: Not yet published
Dutch
02.04.2013 NLD Tweakers.net: 505cd/m² | 1,624:1 contrast | 7,005 color temperature (Delta E = 7.7)| Excellent Chromaticity (Delta E = 4,78) (measured with i1 Display Pro)
Russian
26.02.2013 RUS 3dnews.ru: Not yet published (measured with Spyder 4)
03.04.2013 RUS [email protected] 486cd/m² brightness | 988:1 contrast (1300:1 dynamic) | 8,000K white temperature
French
03.04.2013 FRA Les Numériques 480cd/m² | Contrast 1279:1 | Chromaticity: good (Delta E = 4,5) (measured with i1 Pro or i1 Pro 2 tbc.)
02.02.2013 FRA 01.net 527cd/m² brightness | 2,509:1 contrast (measured with Konica Minolta CA-210)
For reference, here are the luminance ranges of the color testing devices listed above.
i1 pro__________________________ 0.20 cd/m² to 300 cd/m²
i1 pro 2_________________________0.20 cd/m² to 1200 cd/m²
Chroma 5/Sencore Color Pro V_______0.01 cd/m² 1000 cd/m²
Spider 3/4_______________________0.02 cd/m² 5000 cd/m²
i1 Display 2______________._____._.__0.02 cd/m² 3000 cd/m²
i1 Display 3/i1 Display Pro/C6___._____0.003 cd/m² 1200 cd/m²
Konica Minolta CA-210______________0.01cd/m² 1000 cd/m²
Apparently the HTC One's diplay latency is record breaking - measured at 46ms.
Source: Lesnumeriques.fr
It is not at the 1-20ms recommended by Microsoft but it is a great step forward considering the fact that modern devices barely go below 70ms. The previous record was held by the Note 3 with 67ms.
Newer devices:
Note 3: 67ms
LG G2: 110ms
iPhone 53: 75ms
Here is an overview for older devices:
It will be interesting to track the performance of other devices: S5, Z2, etc...
Source
Lesnumeriques.fr
Microsoft explained that high performance touch performance is becoming increasingly key aspect of a mobile device's user experience.
Microsoft report on Display latency
So it is certainly great News that the HTC One is getting closer to perfection.
Is the new M8 like the M7 having sharp and jdi as it's suppliers? I'm thinking mine is a jdi from comparison with my sharp M7.
robt772000 said:
Is the new M8 like the M7 having sharp and jdi as it's suppliers? I'm thinking mine is a jdi from comparison with my sharp M7.
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Their marketing said JDI. Sharp models came later in the year last year, early production were all JDI.
Guys how do you find the colours on the m8.... My reds are way over saturated... Is there a way to make them cooler?
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StickyGeko said:
Guys how do you find the colours on the m8.... My reds are way over saturated... Is there a way to make them cooler?
Sent from my Nexus 4 using XDA Premium 4 mobile app
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The reds are not oversaturated. What you mean is the grey balance is too warm. Saturation and greyscale Balance are two different things.
None of the Displays on the M8 are overly warm. They are actually cooler than the norm. If you feel there is a red push, then probably you are coming from an AMOLED Display wich typically have more green and blue but is incorrect.
No.... What I mean is the reds are over saturated.... I have an n4.... The reds on my m8 are way off, side by side with n4, HTC 8s, nexus 7 and a galaxy tab3...m8 reds are way off, maybe I have a defective unit.... I just wanted to see if anyone else had the same issue
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StickyGeko said:
No.... What I mean is the reds are over saturated.... I have an n4.... The reds on my m8 are way off, side by side with n4, HTC 8s, nexus 7 and a galaxy tab3...m8 reds are way off, maybe I have a defective unit.... I just wanted to see if anyone else had the same issue
Sent from my Nexus 4 using XDA Premium 4 mobile app
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Do you see that on the color red? What do you mean by reds are cooler?
Saturation has nothing to do with color temperature. It has to do with the intensity of the color, not ist hue (which can be shifted toward other colors). For example, a red that is too blue move slightly towards purple and a red that is too green moves slightly towards orange.
Hence my question. If you say your reds are too cool, then it must mean they are too purple.
Saturation means how intensive the color is. If the reds are undersaturated they move towards grey and if they are oversaturated, they move towards "more intense" red. Overaturation cannot be described as cooler but you said your reds were cooler, so probably you mean your color temperature is too cool, hence greys and intermediary colors are shifted towards blue?
As you can see from the Review listed above, the M8 can have color temperature that is on the cool side (>7000K), however this varies from unit to unit, last year color temperature varied from 6,500K to 8,000K with Color temperature decreasing over time (probably because the intensity of the blue pixels decreased faster before settling).
If you feel your display is too cool, it is not a defect, it is luck of the draw. Many people actually prefered the slightly bluer displays last year because they had slightly larger contrast.but also because most displays are cooler by nature (since sunlight is warm and will cancel out the coolness when looking at the display outdoor.
The N4 had excellent grey balance, so probably your eye got used to a more neutral display. Wait a little bit and see how your perception adjusts. If you really don't like it, then return your device and purchase another one...
So far only a few reviews measured color temperature, and the values ranged from 7000K (pretty neutral) to 8,000K (cool) but it is also possible that some displays will have lower temperature (it was the case last year). I will receive my device tomorrow, so I will let you know how my unit stacks up.
StickyGeko said:
No.... What I mean is the reds are over saturated.... I have an n4.... The reds on my m8 are way off, side by side with n4, HTC 8s, nexus 7 and a galaxy tab3...m8 reds are way off, maybe I have a defective unit.... I just wanted to see if anyone else had the same issue
Sent from my Nexus 4 using XDA Premium 4 mobile app
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Click to collapse
Based on my test above, the reds are indeed oversaturated and the display is on the cool side, but both are independent. The reds can be oversaturated without being cool and the display can be cool without oversaturated reds.
Added my own detailed review of the display to the original post.
@puremind do you keep in mind that the M7/M8 feature dynamic contrast? maybe that's what's affecting the results?
hamdir said:
@puremind do you keep in mind that the M7/M8 feature dynamic contrast? maybe that's what's affecting the results?
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Click to collapse
Dynamic contrast is only affecting constrast, not color temperature. I noted that in my post (and also under one of the Russian tests in my list) and the the contrast is 1,000:1 vs 1,300:1 dynamic.
Still these results are not so good on the Type A display.
Also I did compare two units in store, so I can really tell one unit had a much much better display. Last year displays were broadly equivalent except for brightness but this year the Type A display is quite poor (by my picky standards) and cannot compete with Samsung S5's Display. The 2.1 gamma means intermediary colors are a bit washed out. The display is not punchy and has no depth. So be careful what you get! My unit will go back. This is the display type tested by Anandtech, as they noted the same issues.
How do we determine what screen we have?
If reds don't appear to be over saturated can we assume we have the type B screen?
Yea i noticed different feedback about the screen as well...sigh
Maedhros said:
How do we determine what screen we have?
If reds don't appear to be over saturated can we assume we have the type B screen?
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Click to collapse
Red oversaturation is not the most visible aspect. The lack of punchiness and slightly washed out intermediary colors and lack of contrast is easier to spot.
When I am back from London I will measure type B and I expect to see correct gamma and higher contrast.
If you have rooted your phone you can use ES explorer or root explorer to view the last_ksmg file in the root's proc folder. If you look for Display ID you should find it there. It will likely say JDI something or Sharp something.
However it is not guaranteed that the display manufacturer will be different as JDI have a track record of having wide variance in terms of display characteristics. Still the displays are different enough that they could be from different manufacturers.
If anyone has access to a rooted device and can do the test it would be very helpful. Please comment what your subjective impression of the screen is and provide your display ID.
puremind said:
Red oversaturation is not the most visible aspect. The lack of punchiness and slightly washed out intermediary colors and lack of contrast is easier to spot.
When I am back from London I will measure type B and I expect to see correct gamma and higher contrast.
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Click to collapse
Thank you,
Could you also take pictures comparing the two models if possible?
Without context it is slightly difficult to determine what exactly constitutes "lack of punchiness and slightly washed out intermediary colors and lack of contrast."
Sorry - I'm not a bit of a noob when it comes to displays and colors!
Maedhros said:
Thank you,
Could you also take pictures comparing the two models if possible?
Without context it is slightly difficult to determine what exactly constitutes "lack of punchiness and slightly washed out intermediary colors and lack of contrast."
Sorry - I'm not a bit of a noob when it comes to displays and colors!
Click to expand...
Click to collapse
I don't posses both units. The other display type is in store and I am traveling to London the whole week. If I spot a good display at the airport or somewhere else I can shoot a comparison.
This is what I have ... Singapore Grey variant
mdss_dsi_panel_init: Panel Name = m8 1080p sharp/NT35595 cmd mode dsi panel
mdss_dsi_panel_init:1006 Continuous splash flag not found.
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Click to collapse
And another place name mentioned as "mdss_dsi_m8_sharp_novatek_35595_1080p"
To my naked eyes, it looks ok but little on the warm side (yellowish whites)
Sony have the best solution to this. You can change the colour balance in normal settings.
Sent from my HTC One_M8 using XDA Premium 4 mobile app
I was just tinkering with my old S2 and I was wondering why the G3 doesn't have different color profiles like the S2 does. "dynamic", for instance, increases the already quite vibrant oled colors.
my laptop doesn't have an extraordinary screen but nvidia's digital vibrance make up for it quite nicely.
So, is there any way we can digitally enhance color saturation on the G3 on a rooted, stock rom? I don't mind the colors becoming inaccurate, I'm just a color nut (the only reason I'm not switching to a note 4 is the price).
Note, I am aware of the color tweaking you can do in the ease of access panel, but that only gives a small contrast boost before it starts to change the hues completely.
It doesn't have the Samsung tweaks because it's not a Samsung device.
The only colour Adjustment I know of is the one in Accessibility. Haven't heard of any others
Go to Settings > Accessibility > Color Adjustments, and set it just above the camera icon
Check out the screenshot
and put it exactly there
and BOOM... colors are more vibrant and more contrast to the display in general
Oh and BTW the reason is that the G3's display is an IPS panel while the S2 ( and most Samsung's phones) is an AMOLED display..which is by it's nature has more vibrant colors(more than I like) and deeper blacks than IPS displays
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Hi together, I just bought a SM-T500 and all in all i am happy with it. I mainly use it for webbrowsing and watching Youtube, Netflix etc.
I noticed that the colors of the display are extremely dull and washed out. Worse than my old Galaxy Note 10.1 (GT-N8000) from 2012, which should be replaced by the SM-T500. I can't really imagine that the panel used in the T500 is THAT bad. Unfortunately there are no proper display settings at all, so I am stuck with a display that looks almost like greyscale compared to other displays. (I know that the colors of an LCD are not so rich and vibrant compared to an AMOLED for example).
Is there any chance I can get around this problem with a custom rom?
I just recently learned about widevine. Does a custom rom break my widevine L1?
Thanks in advance
Is there even a custom ROM for T500?
Is there a custom ROM for T500 that fixes color temperature? Its own blue light filter acts like a bad blue light filter from the Playstore.
Check out this app, it works perfectly with root https://play.google.com/store/apps/details?id=mobi.omegacentauri.red&hl=en&gl=US