I have a Seicane unit with a 9" screen installed, and well the LCD is no way as bright as the OEM Nav screen was. Has anyone attempted to replace the back-light in theses screens with light with higher light output?
sparcvx said:
I have a Seicane unit with a 9" screen installed, and well the LCD is no way as bright as the OEM Nav screen was. Has anyone attempted to replace the back-light in theses screens with light with higher light output?
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Do you use sunglases ?
Are they polarizied ?
Does the brigthness change when you tilt your head ?
I don't know about your unit but mine has no issue with polarization.
The panel looks like an IPS panel that does not distort when looking at an angle. Its just the overall brightness is not quite upto par for bright daylight use.
Related
I've found out, that the Amoled can't display perfect black. I tried the desktop clock thing, the blackle Google page (scrolled to black only area), and I made a photo in PhotoShop completely black and open it up in gallery.
What I noticed is, that the screen still is displaying something when it should be black. This is very easy to see if you put the phone to sleep when displaying such black.
What am I missing? Doesn't the Amoled completely turn of a pixel that is black? Can someone try to replicate this?
Do you think it's possible that I have an lcd desire and just don't know it?
Sent from my HTC Desire
I have also a Hero (with lcd display) and black on my Desire is "more black" than Hero's
For me it's ok
If you look at LCD screens through a circular polarisation filter you'll sometimes see coloured patterns on it, or it will get completely filtered out at a certain angle. To the best of my knowledge, OLEDs don't emit polarised light, so if you've been to see Avatar or another movie in Real3D and walked away with the glasses then you can use them as an LCD detector...
(The blacking out effect works as a cool CSI-esque monitor dust detector)
No disrespect, but... who cares???
So the blacks are not as deep as say, a Kuro plasma. This is a smartphone, not a home theater tv.
Jaa-Yoo said:
No disrespect, but... who cares???
So the blacks are not as deep as say, a Kuro plasma. This is a smartphone, not a home theater tv.
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no disrespect but,...
well real black "off pixel" don't use power so all the people who care about batterylife might care...
s.
I don't think they do emit light on blacks. I have noticed that in a completely dark room I can't see blacks on my Desire at all, it emits no visual light. Maybe the black you were testing isn't pure black.
Sent from my HTC Desire
"It's like, how much more black could this be? And the answer is none. None more black."
Couldn't help myself
Sent from my HTC Desire using XDA App
I do agree that it is much better than any lcd. BUT black should be no light at all. When you turn off the screen when all the pixels are supposed to be off, you see a change. You can also see the outline of the screen when it is in any of the previously mentioned methods of darkness.
Sent from my HTC Desire
I did the following test :
- found a room where I could be in complete darkness
- used the following enclosed file (a pure RGB=(0,0,0) 800x480 png file) and displayed it fullscreen on my phone.
- use the palm of a hand to cover the 4 lit buttons
- the screen is pretty damn BLACK ! (an LCD screen, next to it, also displaying black pixels, would look like a torchlight)
- After a minute or so, the eyes getting used to the darkness, I could very slightly see the screen. I don't know how the phone is built, but I'm guessing it's a light "leak" coming from the LED(s) of the 4 buttons.
I tried this procedure at various brightness settings (from min to max) : the remaining light coming from the screen did not change.
Is there a mod to kill the buttons backlight ?
It is possible to kill the backlights, but have not tried it myself.
http://forum.xda-developers.com/showthread.php?t=704977&highlight=buttons+backlight
Ok, switched off the buttons backlight thx to Flaggie. The screen indeed still emits some light when displaying a full screen black picture. Strange.
It would be interesting to get an explanation from HTC about this, but i'm pretty sure it pointless hoping they would reply to such a question. I'll give it a try...
Perhaps you hae one of those new Desire models with a LCD screen?
No, I bought it the day it came out. Try out on your own. The test I detailed is pretty straight forward...
kekkle said:
Perhaps you hae one of those new Desire models with a LCD screen?
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That is what I thought at first, but than the amount of light on dark would change when you change the brightness.
I want to know what HTC has to say about this.
PS: I bought my phone in June.
Sent from my HTC Desire
OMG does any of you know how a led screen works? lol Active Matrix Organic Light Emitting Diode its name clearly states that the pixels are self-illuminating so clearly unless the screen is of the display is always going to give some light off
It is actually the other way around. They are self emitting, they can turn off. LCDs, however have a backlight, which doesn't turn off, so some light still passes through.
Sent from my HTC Desire
OLED can havae infinate contrast ratios. I have a cowon s9, it has an OLED screen and in a pitch black room you cannot tell it's on. The desire does emit some light even on true black :-/
AndroHero said:
OMG does any of you know how a led screen works? lol Active Matrix Organic Light Emitting Diode its name clearly states that the pixels are self-illuminating so clearly unless the screen is of the display is always going to give some light off
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OMG please read the Wikipedia article...
Unlike over saturated colors and Pentile jagginess which are clearly visible and to some point distracting (at least to me) this seem like pure academic issue, since it can be visible only in total darkness and even then it is not visible unless screen is completely black.
What would be practical purpose in looking at black screen in darkness?
vlasac said:
Unlike over saturated colors and Pentile jagginess which are clearly visible and to some point distracting (at least to me) this seem like pure academic issue, since it can be visible only in total darkness and even then it is not visible unless screen is completely black.
What would be practical purpose in looking at black screen in darkness?
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I agree. This is an academic issue, but aren't you a bit disturbed by the fact that there has been soo much talk about this oled screen and its pure black, and it was all a lie?
I think the problem might be in the image to screen processing where it gets converted to the pentile matrix(and over saturated).
Sent from my HTC Desire
Hi,
My phone suffered a blow and now the display is just black. The digitizer works, I've managed to export the contacts to the SD card to verify and nothing really seems out of order (receiving calls, haptic feedback, etc.).
I ordered an S-LCD replacement display, seeing as the box didn't say AMOLED. It arrived, I changed the display and it didn't work (no backlighting at all, which was present with the damaged display). I contacted HTC and they said that the phone has an OLED display in it, that there are no big differences between AMOLED and OLED and that they can not officially provide me with an answer if I can put an AMOLED display in my Desire.
TL;DR
My question is: Can I buy an AMOLED display and put it in my Desire, which currently has an OLED display in it?
It seems weird, because I haven't read about anyone with an OLED display in their Desire and ebay shows nothing.
Any help is hugely appreciated!
There are only amoled and slcd displays. Obviously amoled implies oled. You cannot interchange them either. If you had slcd (backlit) then that's what you must have.
Perhaps contact HTC again as they or you are confused :s
Sent from my HTC Desire using Tapatalk
The screen was backlit with the original one in it and no backlight with the S-LCD. So I guess it's AMOLED? Thanks for your help.
humi1090 said:
The screen was backlit with the original one in it and no backlight with the S-LCD. So I guess it's AMOLED? Thanks for your help.
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Depends if you're using the word "Backlit" correctly. OLED screens are not Backlit. Hint, LED = Light Emitting Diode. Each pixel emits its own light. LCD IS backlit, meaning light is shone through the pixels.
rootSU said:
Depends if you're using the word "Backlit" correctly. OLED screens are not Backlit. Hint, LED = Light Emitting Diode. Each pixel emits its own light. LCD IS backlit, meaning light is shone through the pixels.
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OK, I'm using it wrong in that case. That makes sense. I mean that the screen seemed to turn on, even though it was all black.
humi1090 said:
OK, I'm using it wrong in that case. That makes sense. I mean that the screen seemed to turn on, even though it was all black.
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That sounds like backlit. A pure black display on OLED will not emit any light. The pixels display black by remaining turned off. Unlike LCD, where even to make black, it emits light as the backlight is on for all pixels.
rootSU said:
That sounds like backlit. A pure black display on OLED will not emit any light. The pixels display black by remaining turned off. Unlike LCD, where even to make black, it emits light as the backlight is on for all pixels.
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The word I got from HTC Sweden was that my display was OLED. I'm almost more confused now.
Boot up the device, connect it to PC and start adb shell.
Type the command:
Code:
dmesg | grep panel
That should tell you what you should have.
Anyone else notice this?
When my Lumia 900 display backlight is set on low, the colors seem... off. However, when its on high, they look normal.
I did not have any color issues like this with my old Focus.
I've noticed this to somewhat,I'm sure it has something to do with the amoled screen, I however have been having issues with WiFi,I never seem to get a good solid connection even when I'm in the same room as the router, sometimes itll work fine,but it acts as if it cuts in and out
Sent from my Nokia Lumia 900 using XDA Windows Phone 7 App
Thats why I mentioned I had a Focus, I believe it has the same type of screen. Minus the Nokia ClearBlack of course.
jedivulcan said:
I noticed this too. The screen seemed dingy and grainy. From what I've read, it's the nature of AMOLED technology and I think that color temperature scales more with the brightness setting compared to IPS handsets.
I also had a theory that the ClearBlack layer between the glass and the display may make the display grainier, as I've read it scatters the light or does something to make it less reflective but hinders the overall display at lower brightness.
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My lockscreen image's colors look much much darker unless I put the screen brightness at mid or high.
Does your issue go away if you turn the brightness up?
Hey guys, I've got a tianma display with the infamous pink tint from angles. I compared it with a store unit and my unit's display quality is subpar. The brightness, contrast and viewing angles all are bad compared to the store unit which had SHARP panel. Tianma owners, did your unit's pink shift improve? How did HTC respond with your pink shift if you contact them for this problem??
PhiLee1998 said:
Hey guys, I've got a tianma display with the infamous pink tint from angles. I compared it with a store unit and my unit's display quality is subpar. The brightness, contrast and viewing angles all are bad compared to the store unit which had SHARP panel. Tianma owners, did your unit's pink shift improve? How did HTC respond with your pink shift if you contact them for this problem??
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So the pink shift when viewing off angle stays. It's definitely not glue, rather something to do with polarisation or a coating on the display. That being said, the screen on my phone has gotten much better when viewed straight on; it always used to look rather pink when compared to my iPod Touch 6g (which is generally well calibrated) but now just looks a little cooler which is fine since the iPod is slightly warmer than neutral anyway. The screen has not gotten any brighter, viewing angles are better but still slightly pink past ~60-70 degrees, especially in portrait and much less so in landscape. It took around a month to settle down for me, I've had the phone for two months now and really like the display. I do a lot of photography work and know what a well calibrated display looks like and the 10 is pretty spot on. As for brightness, it's not the brightest always visible even in the Australian summer, just make sure power saver isn't on since it caps the max brightness considerably.
I have a MTCD PX5 unit I bought about 3 months ago - seems to be a KLD unit based on research around its MCU. I have some concerns around the quality of the the LCD used and some issues with it. I don't have any other Android HU to compare it to so I thought I would open up a thread and get some feedback based on what others experience with their units to determine if this is normal.
My concerns:
- The screen is not bright enough. Does anyone else experience this? During a sunny day, the LCD is very reflective and not very bright (even though I have brightness set to max), making it difficult to see. In the late afternoon when the sun isn't so strong, its much better and easier to see.
- I experience burn-in from elements on the page that don't move. This becomes apparent when I change over to another screen (especially when its a plain screen with not much on it like a blank web page). I can see elements such as logo or music controls still displayed as if the pixels haven't updated yet. It goes away within a minute or so but wondering if this is normal as these LCDs are probably low quality. You can see it on the 3rd image, I use car launcher AG and after a while when I changed to a plain screen you can still see the VW logo and other buttons from the launcher still visible.
I just want to check if these issues are normal or if my unit has a bad screen and I need to replace via warranty. I've attached some examples.
Screen on my unit is an 8 inch LCD with resolution of 1024x600
Concerning the brightness I would say this is quite normal. All units I have seen yet seem to have around the same brightness level as visible on your pictures. I did apply a protective film on my unit with matte finish which reduced reflections and therefore improved the situation a bit. However still the screen can't keep up within direct sunlight. I actually thought about modifying my unit and checking if it's possible to boost the backlight. But certainly this requires hardware modification and might have negative impact on contrast and colors (which isn't that important while driving or using navigation).
Also there are 2 brightness levels if your unit is connected to the car correctly. One level is set when headlights are off and one for headlights on. The headlights-on setting can be configured individually in settings and is typically lower brightness for nighttime driving. Still I agree the highest brightness is too low and the lowest brightness is to bright. Fortunately the KLD units typically have a "screen off" button in the notification bar. So it's possible to turn the screen completely off. Very handy during night drives.
Regarding the burn-in effect: I didn't notice this yet on my KLD unit but it might heavily depend on the screen type. They might even buy screens from multiple manufacturers just to get the cheapest offer. So yes, you might have got a bad quality LCD screen even though it's not defective. I will try to keep an eye on my one if I notice the same.
I've got an ATCGFEHNY unit which I think is just an XTRONS for my W211 mercedes. Having same kind of LCD Burn In issues. If anyone knows of good replacement touch LCDs please let me know and I'll rip this thing apart and swap it out.