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[Q] Pixel Qi; Transreflective, Transmissive, Reflective?

Anyone with a Pixel Qi model answer this for me?
According to reviews and Pixel Qi / Notion Ink sites, the screen is supposed to have 3 modes.
Pixel Qi’s 3Qi display operates in three modes: a full-color LCD transmissive mode; a low-power, sunlight-readable, reflective e-paper mode; and a transflective mode, which makes the LCD display visible in sunlight. source: http://www.wired.com/gadgetlab/2010/01/the-pixel-qi-display/
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In pre-reviews, I thought I noticed people switching between the 3 modes, Full Color, Low power Partial Color and Gray / Black modes.
But now in recent reviews, I see people mention only two modes, except I see them press the switch more often than just 2 times to switch between. And depending on what video reviews you watch, you can see they actually switch between the 3 modes..
-CC

Transmissive and transflective are the same 'mode', it just depends if the majority of the light for viewing is coming from the backlight or ambient light (such as the sun). In the case of sunlight, the screen will still be color although it will appear washed out.
Reflective on the other hand uses no backlight and relies solely on the ambient light, in addition to switching to gray scale.

I still haven't found a proper review about someone using pixelqi on flights.
Just for pixelqi readability, you are pretty much getting the worst lcd ever and so, settling for a compromise is a big deal.
Sent from my SPH-D700 using XDA App

IPS display

is it good? I'm only used to OLED.

The IPS display on the Nexus 7 looks good from what I've seen. IPS is known for decent viewing angles.

it depends on the OLED screen you're comparing it to.
the galaxy s2 has super amoled plus, which has a full rgb subpixel matrix, but only a resolution of 800x480. the full rgb subpixel matrix makes everything look clearer and sharper.
the galaxy nexus, galaxy note, and galaxy s3 use a pentile subpixel matrix. its something like rgbg, which makes the display look greenish. its not as sharp as a full rgb matrix, and the colours arent as vivid due to the lack of subpixels (ends up being around 66% less subpixels).
however, the main advantage of the oled displays is that their pixels can be turned off. this means that in movies and games, you have a 'true' black, whereas in led backlit LCD displays (unless it has full led backlight with local dimming) blacks will always seem greyish. oled displays also tend to oversaturate the colours. the other advantage is that since black means the led/pixel is turned off, it means that using a black wallpaper on oled displays will reduce power consumption and improve battery life.
the nexus 7 uses an IPS panel. the general idea is that all the pixels are aligned/parallel, which leads to the image looking sharper compared to TFT and TN panels. the nexus 7 also has a full RGB subpixel matrix which makes it much sharper, and in combination with the IPS setup, it leads to more accurate colour representation. however, as it is not an oled display and it does not have local dimming with a full led backlight (having such a setup would make the device much thicker), it is unable to render 'true' black and as a result, blacks end up looking a bit grey.
cant really say much about which one is better as it is a personal preference thing. some like the oversaturated colours of OLED as it seems more vivid, whereas others prefer the accuracy of IPS panels and sharpness.
at the moment, i own a galaxy note with a pentile amoled display, and i use a 37inch Panasonic TV for my PC display, which uses an IPS panel. i'd say both are pretty good in their own way, but i prefer the IPS panel simply because of the full set of subpixels and colour accuracy.

Waiting to see how hard I rage about the non-black backgrounds.
anandtech measured nexus 7 black at 0.37 nits, whatever that means.

as souai said, it really depends.
generally OLEDs have much better colors and look better, IPS is much better in sunlight though because it's brighter and has insanely good viewing angles up to 178 degrees.
I have a first gen asus transformer which uses and IPS screen and though it's not as impressive color/quality wise as the Galaxy S III and even my Galaxy Nexus (sometimes) it's still excellent and i've never been bothered by it.
and given the fact that the N7 has such a high pixel density it should look great, and the reviews have backed this up.

This isn't apples to apples here but comparing the gnex to the one x I say I definitely prefer the IPS display. Now this is the best version possible probably of its type but I'm happy for the n7 to get an IPS screen. Almost all reviews have talked about how nice it is, only complaint being a little warm and a little dim compared to some other IPS displays. I like my oled screen but since good IPS high res screens have come out, they seem to be superior to oled at the moment. Oled uses up lots of battery in anything other than very black biased setups. IPS has that slight gray to the black but most people are used to their computer monitors and TVs having this as well. I think we won't have to sorry as much about color uniformity as much either with IPS.
Sent from my Galaxy Nexus using xda premium

nvm

thanks for the replies. it's helpful.

LCD Contrast Test

This is the app I used to test: https://play.google.com/store/apps/details?id=engn.test.screencolor&hl=en
Contrast - Black: Squares 6 and above are clearly distinguishable, 4 and 5 are just about visible
Contrast - White: All squares are distinguishable
Color Scale - Brightness: All squares are distinguishable
Color Scale - Saturation: Highest 4 squares are equally saturated on all but orange, light blue and grey
This is with an AUO panel and default white balance - I'm hoping someone with a JDI panel (or indeed another AUO) can weigh in with their observations.

what is wrong with your display then?

I have the JDI (Novatek) and confirm the same crushed black levels with Color Test and Display Tester - except that only 7 and above are distinguishable. White contrast and brightness are the same as yours, but color saturation tests vary between the two apps .... personally I trust Display Tester better, which shows blues only are moderately over-saturated.
The crushed blacks are definitely noticeable in dark scenes with or without X-Reality. The panel is quite warm compared to others, and the White Balance settings are somewhat useless since they involve an overlay filter, it seems, and so just darken the screen.

ghtop said:
I have the JDI (Novatek) and confirm the same crushed black levels with Color Test and Display Tester - except that only 7 and above are distinguishable. White contrast and brightness are the same as yours, but color saturation tests vary between the two apps .... personally I trust Display Tester better, which shows blues only are moderately over-saturated.
The crushed blacks are definitely noticeable in dark scenes with or without X-Reality. The panel is quite warm compared to others, and the White Balance settings are somewhat useless since they involve an overlay filter, it seems, and so just darken the screen.
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Yeah not too happy with the white balance setting compared to voodoo/cm colour settings on my old galaxy s, but gets the job done for the most part. Call me crazy but I like it even warmer than default
And hopefully there will be some software improvements to the display in Kitkat

how can i know if my device use JDI or AUO panel?

It says on the back of the screen
Sent from my D5503 using Tapatalk

pepeo123 said:
how can i know if my device use JDI or AUO panel?
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Assuming you don't like the idea of dismantling your phone to check the back side of the panel you might want to follow my instructions in this post.

Yes Louis has the best way, sorry for my late reply, only just got my screen back in. Mines a JDI
Sent from my D5503 using Tapatalk

Z1c black w9 telenor-hungary auo-panel (no "blue" problem)
To dark, the dark areas (too high contrast/gamma), dislike me...
But, good deep-black.
Automatic background light regulation not a good idea (automatic brightness: OFF, x-reality: OFF ).
- sorry my bad english -

solution for "crushed blacks" here : http://forum.xda-developers.com/showthread.php?p=51945091

that's good

Darkimmortal said:
This is the app I used to test:
Contrast - Black: Squares 6 and above are clearly distinguishable, 4 and 5 are just about visible
Contrast - White: All squares are distinguishable
Color Scale - Brightness: All squares are distinguishable
Color Scale - Saturation: Highest 4 squares are equally saturated on all but orange, light blue and grey
This is with an AUO panel and default white balance - I'm hoping someone with a JDI panel (or indeed another AUO) can weigh in with their observations.
Click to expand...
Click to collapse
AUO Panel here. Results are pretty much similar in mine.
Color Scale - Saturation: The last 4 squares on the right end are clearly distinguishable for all except yellow and bluish green. Just about distinguishable for the green line.
On an unrelated note, I noticed that the INDOOR brightness level on the AUO panel is getting decreased by at least 4 levels on a scale of 100, when I put the slider to the lowest end and checked 'Adapt to lighting conditions'. You can see the difference very clearly by checking and unchecking the 'adapt to light' check box. Might save some battery during indoor use or ebook reading.

How accurate are your display's black and white levels? Software fixes?

http://www.lagom.nl/lcd-test/black.php
I've always used the above link for testing how accurate my displays are. The tests on that site I've found most important in descending order are black level, white saturation, and contrast. (the gamma calibration test never seems to work well on phones)
The Axon 7 (A7) is my first AMOLED display. My old phone is the Nexus 5 (N5) with an IPS display.
On the black level test, squares 1-6 all blend with the black background on the A7, while the N5 only loses square 1 to the background. On white saturation, the A7's last visible square is 251, while on the N5 I can see up to 253. Finally, on the contrast test the A7 colours start at 2-3, with red and pink washing out the soonest at 21. On the N5 all the colours are visible at 1, and red and pink wash out at 25.
Through all these tests it seems the stock A7 AMOLED display is over saturated with poor contrast. On the stock ZTE firmware, the only display adjustments are in settings under "screen effects". Mine is set to Natural and Warm, but all settings here do not affect the test results.
I've read that after many complaints, OnePlus updated their firmware to give the OnePlus 3 special RGB calibration tools. Are there any apps that could do similar corrections on the Axon 7? Any rooted apps, or would CyanogenMod correct this?
It's becoming quite obvious when browsing photos or watching video, and especially takes away from the experience in dark movies.

2019 Tab A 10.1 display

The Samsung website says it is TFT, but several reviews from earlier this year say it is IPS. Which is it ?

IPS is a type of TFT, so it's both.

Well, ah, sort a ...
From ASUS Zen Talk
IPS stands for In-Plane Switching and it is a further improvement on TFT LCDs. The way the crystals are electrically excited on them is different and the orientation of the crystal array is rotated. This orientation change improves viewing angles, contrast ratio and color reproduction. Energy consumption is also reduced compared to TFT LCDs. Because IPS LCDs tend to be better than TFT LCDs, they are also more expensive when put on a smartphone (or tablet).
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From my own personal observations, IPS tends to be brighter and sharper. It biggest benefite is the vastly improved viewing angle with no color shift. This may not be an issue for phones and tablets, but it is HUGE for large screens used by artists and photographers.
Why wouldn't Samsung advertise this when their main low end competition, Amazon Fire HD 10, makes a big deal about ?