Please check your nexus 7 tablet for backlight bleeding

**blackberrymamba** · 08-01-2012, 05:07 AM

Is it expected that all of these units have some backlight bleeding? I have gone through 4
Of these tablets and all have a bit of backlight bleed issues. You can see it when you turn brightness all the way up and use the screen tester app and use the black screen in the background. On some its not so bad with just a little along the edges. Is it acceptable for there to be some backlight bleed?

How to check.

Can you guys do me a favor and turn brightness all the way up making sure to turn off the auto dimmer.

Then download the free screen tester app.

Go through all the colors and check for dead pixels while your at it.

Now when you get to the black screen check to see if you have light coming through the corners.

Any shade of white that you see is backlight bleed.

I just want to know if this is a common defect. After going through literally five units all had backlight bleeding. That's a strong case that most of these units have some backlight bleed.

**pdhahn** · 08-01-2012, 07:26 AM

Mine has some really minor bleeding in the lower left hand corner, but after going through 4 units to get one without dead pixels or screen lift I'm not going to be that picky about it. I have seen some really bad examples though.

Sent from my Nexus 7 using Android Central Forums

**jd914** · 08-01-2012, 07:43 AM

Originally Posted by blackberrymamba

Is it expected that all of these units have some backlight bleeding? I have gone through 4
Of these tablets and all have a bit of backlight bleed issues. You can see it when you turn brightness all the way up and use the screen tester app and us the black screen in the background. On some its not so bad with just a little along the edges. Is it acceptable for there to be some backlight bleed?

so you deliberately go through a process that no normal person would do to see if there's light bleeding? Then because of this you returned four devices? Why not just use your tablet how it was intended to be used? I can understand if there's obvious problems, we all have them but going out of your way to create or find problems is a little counter productive, don't you think?

Sent from my Nexus 7 using Tapatalk 2

**trayes77** · 08-01-2012, 10:15 AM

I dont know if there is a bleed issue with all devices, but I can say through experience, that two devices from two different stores had that issue. I purchased 16gb from Staples and noticed that on the left edge of nexus the whites were white amd the right edge was much warmer whites. I looked at a plain background and noticed that some light was bleeding on the left edge. I returned it at a differ staples and that unit had the same issue plus a raised screen. I called all local staples and no one had 16gb nexus 7. Since Staples has only a 14 return policy, I called up the store that had my original nexus that I returned and just swapped them back.

So Im just going to deal with, the left side isnt too back and the screen is not raised at all.

**Mooem** · 08-01-2012, 10:22 AM

I get a little bleed on the bottom left which is noticeable on the navigation bar. Otherwise, it doesn't really bother me all that much. I haven't had any pixel or raised screen issues.

But it's certainly something that they should improve upon.

**blackberrymamba** · 08-01-2012, 01:20 PM

Well maybe I am being unreasonable then and too much of a perfectionist. I just want to know what is acceptable I guess. I thought it should be black with no light bleeding on the edges but maybe I'm being unreasonable. I really hate having to return stuff.

**trayes77** · 08-01-2012, 01:27 PM

Your not being unreasonable, I feel the same way you do. You want your new device to be perfect. People may comment on the fact that that is what you get for an inexpensive tablet. I dont buy that, think its ridiculous. I also dont agree with comments that say first time owners should expect defects. These are two major companies that have shipped many products in the past. That said, I dont know if the bleeding is a natural issue/ common for lcd panels. I do realize that these are regular panels, and not lcd 2 panels for example.

**eneisch** · 08-01-2012, 04:30 PM

I think some small amount of back light bleed at full brightness is acceptable. People have also noted it in the past with iPhone and IPad launches and at first it seems to be a big issue, but after a while the furor dies down. If it is noticeable in your everyday use of the N7 then I would consider returning it for a new one.

**ShaggyKids** · 08-02-2012, 06:11 AM

Originally Posted by jd914

so you deliberately go through a process that no normal person would do to see if there's light bleeding? Then because of this you returned four devices? Why not just use your tablet how it was intended to be used? I can understand if there's obvious problems, we all have them but going out of your way to create or find problems is a little counter productive, don't you think?

Sent from my Nexus 7 using Tapatalk 2

I agree. If you're not going to use it with the brightness turned all the way up what's the point?

**Nychotxxx** · 08-02-2012, 06:20 AM

Its called tech ocd.

**natehoy** · 08-02-2012, 10:27 AM

My blacks are not truly "black" at full screen intensity, more of a very dark grey. This is exactly like every other backlit LCD panel I have ever owned, so this is to be expected.

When I turned my screen to 100% and went into a darkened room, I could see where the backlight light sources were - the screen was just a teensy bit brighter in those spots (primarily at the top on either side of the front-facing camera) - but again this is normal for an LED backlight in a LCD.

There is no sign of actual "bleed" in terms of a white bar at the edges or any sign of a misalignment of the LCD and backlight that allows excessive amounts of light through the LCD panel.

I've never actually turned the screen up to 100% before, and dear goodness me this screen is flat-out gorgeous! But almost painfully bright in a dark room.

**Unicorn Rancher** · 08-02-2012, 10:54 AM

Originally Posted by jd914

so you deliberately go through a process that no normal person would do to see if there's light bleeding? Then because of this you returned four devices? Why not just use your tablet how it was intended to be used? I can understand if there's obvious problems, we all have them but going out of your way to create or find problems is a little counter productive, don't you think?

When I test drive a car, I always see if it will balance on two wheels for a few blocks, to make sure there are no defects.

**natehoy** · 08-02-2012, 10:57 AM

Originally Posted by UnicornRancher

When I test drive a car, I always see if it will balance on two wheels for a few blocks, to make sure there are no defects.

Yeah, but you don't go over a jump, do you?

Didn't think so.

Wimp.

PS: If you go over a large enough jump and find a defect, the bastages can make you buy a defective car!

**Unicorn Rancher** · 08-02-2012, 11:14 AM

Originally Posted by natehoy

Yeah, but you don't go over a jump, do you?

Didn't think so.

Wimp.

I did once but my insurance wouldn't cover the damage.

**blackberrymamba** · 08-02-2012, 04:36 PM

Originally Posted by natehoy

My blacks are not truly "black" at full screen intensity, more of a very dark grey. This is exactly like every other backlit LCD panel I have ever owned, so this is to be expected.

When I turned my screen to 100% and went into a darkened room, I could see where the backlight light sources were - the screen was just a teensy bit brighter in those spots (primarily at the top on either side of the front-facing camera) - but again this is normal for an LED backlight in a LCD.

There is no sign of actual "bleed" in terms of a white bar at the edges or any sign of a misalignment of the LCD and backlight that allows excessive amounts of light through the LCD panel.

I've never actually turned the screen up to 100% before, and dear goodness me this screen is flat-out gorgeous! But almost painfully bright in a dark room.

That allows excessive amount of light? So are you saying there is light that goes through on the edges. Can you take a pic and tell us what you mean. Try to go in a dark room with no light. At 45 percent brightness I don't notice the bleed too much if at all.

**trayes77** · 08-02-2012, 04:52 PM

I noticed that the left edge of my screen is whiter than my right side. There seems to be a little more light emanating from the left. Coincidentally that side gets warmer than the right side after playing intense games. I dont know if this is normal with lcd but I dont think its worth returning and risk getting a unit with the other issues floating around.

Has anyone else noticed if their screen is whiter than the other side?

Sent from my Nexus 7 using Android Central Forums

**AZBrowncoat** · 08-02-2012, 06:20 PM

What app are you all using to test your screens?

...I downloaded 'ScreenTest' and couldn't find any dead pixels and only very minor (and I do mean minor) light bleed.

**F34R** · 08-02-2012, 06:52 PM

no dead pixels and no apparent light bleed.

**natehoy** · 08-02-2012, 08:39 PM

Originally Posted by blackberrymamba

That allows excessive amount of light? So are you saying there is light that goes through on the edges. Can you take a pic and tell us what you mean. Try to go in a dark room with no light. At 45 percent brightness I don't notice the bleed too much if at all.

There is a slightly brighter bit where the actual LED Lights are located. It's only visible at very high brightness levels in dark rooms. It's not excessive at all. Far from it.

The nexus has an extremely well built panel, nearly as good as some of my ThinkPad panels and in my opinion those are the standard upon which all other panels are judged.

Tried to take a picture but I lack a camera capable of capturing the subtlety of what I am taking about.

Sent from my Nexus 7 using Android Central Forums

**blackberrymamba** · 08-03-2012, 07:30 AM

Originally Posted by natehoy

There is a slightly brighter bit where the actual LED Lights are located. It's only visible at very high brightness levels in dark rooms. It's not excessive at all. Far from it.

The nexus has an extremely well built panel, nearly as good as some of my ThinkPad panels and in my opinion those are the standard upon which all other panels are judged.

Tried to take a picture but I lack a camera capable of capturing the subtlety of what I am taking about.

Sent from my Nexus 7 using Android Central Forums

Take a picture of the tablet in the dark in a pitch black room turning brightness to 100 percent. I bet I could spot the backlight bleed. Also press around the bezel at the edges of the screen with a good amount of pressure and see if the light changes or gets white around the area your pressing.

**blackberrymamba** · 08-03-2012, 07:34 AM

Originally Posted by F34R

no dead pixels and no apparent light bleed.

Can you take pic in pitch black room with brightness at 100 percent, and use the black screen in the screen tester app. Also apply a little pressure along the edges of your screen and look for the screen to turn a bit white where your pressing. I can probably find the light bleed for you.

**dportal2006** · 08-03-2012, 07:38 AM

Originally Posted by blackberrymamba

Is it expected that all of these units have some backlight bleeding? I have gone through 4
Of these tablets and all have a bit of backlight bleed issues. You can see it when you turn brightness all the way up and use the screen tester app and use the black screen in the background. On some its not so bad with just a little along the edges. Is it acceptable for there to be some backlight bleed?

How to check.

Can you guys do me a favor and turn brightness all the way up making sure to turn off the auto dimmer.

Then download the free screen tester app.

Go through all the colors and check for dead pixels while your at it.

Now when you get to the black screen check to see if you have light coming through the corners.

Any shade of white that you see is backlight bleed.

I just want to know if this is a common defect. After going through literally five units all had backlight bleeding. That's a strong case that most of these units have some backlight bleed.

There is a little bit coming from the left side but it is not noticeable.

Sent from my Nexus 7 using Android Central Forums

**natehoy** · 08-03-2012, 09:02 AM

Originally Posted by blackberrymamba

Take a picture of the tablet in the dark in a pitch black room turning brightness to 100 percent. I bet I could spot the backlight bleed. Also press around the bezel at the edges of the screen with a good amount of pressure and see if the light changes or gets white around the area your pressing.

In absolute darkness I can run the black screen test and still use my Nexus as a flashlight, and the color is not true black. There are a few points that are a little whiter where the LED backlights are located and the diffusers that are designed to spread the light evenly across the panel are not 100% effective. When holding it normally, other than a few slightly bright spots where the LEDs are located, the dark, dark grey is even and consistent. This is normal behavior in my experience on an LCD-backlit-LED screen.

I took a picture of it but all you see is the home row icons and a whole lot of black. I don't have a night-capable camera, only consumer-grade digital gear, I'm afraid. Short of a DSLR with a long shutter, I honestly don't know how I can capture the gradient around the LED backlights, but it's very subtle, EVEN in the dark, and EVEN at 100% backlight. In other words, it's very well within the tolerances of what I've had in the past.

I had a previous BlackBerry where the backlight was actually visible (blinding, really) if you looked at the phone at an extreme angle. There was a gap between the LCD screen and the glass cover and one of the backlights was placed so it was directly visible in that gap. There's none of that nonsense on the Nexus.

If I push on the sides of the screen near the bezel harder than I normally would, on the left side I can make color bleed happen in full light not even at 100% screen brightness. There's enough flex in the back case and/or attachment between the glass and the LCD to allow some pressure in there if you squeeze the unit. This simply means the unit has some flex in it, probably to try and prevent instant transmission of any impact from the back case to the glass, or maybe because it was built on a budget and they didn't do a tensioned wraparound bezel. I can do the exact same thing on any LCD panel I've owned, including my HTC Thunderbolt and my wife's Samsung Galaxy S2.

In either case, I'm not in the habit of squeezing the edges of my glass panels or running my screen at 100% in darkened rooms and it is in no way affecting my enjoyment of the device. The screen and build quality are every bit as good as my other decent fondleslabs (iPod Touch, and the aforementioned other two phones) and considerably better than the two Pandigital tablets I have experienced.

I'm either misunderstanding what you mean by "backlight bleed" or you're being too fussy. I see only the amount of bleed expected from a normal LCD panel.

**trayes77** · 08-03-2012, 10:37 AM

Thanks for the thorough explanation and going through examining your screen. From what you explained, I have the issue where the diffuser is not transferring the light evenly throughout the screen. The left side of the screen is whiter than the right side.

Sent from my Nexus 7 using Android Central Forums

**Chocoburger** · 08-03-2012, 10:56 AM

I just tested mine, it wasn't pitch black but it was pretty dark. I did see a tiny hint of white light seeping through. It wasn't anything that bothered me though. I am perfectly pleased with my screen.