Question about Apple iPhone Smartphone

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My iphone will only display a bright white screen & I cannot reset it or anything.

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Sorry but your LCD screen may need replacement. Take it to the apple store and see if they'll give you a replacement. If they don't there are third party iPhone Repair Services that can fix it for you. There are also free iPhone Repair guide that show you how to fix it yourself. The part is on Ebay.

Posted on Jul 10, 2010

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Posted on Jan 02, 2017

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How to turn off backlight on iphone 4


There is no separate "back light" setting like there used to be on some earlier phones.

In the Settings app of your iPhone, there is a section called "Display & Brightness". You can use that to make your phone's display brighter or dimmer, but as you have probably discovered, it dims or brightens both the foreground and the background elements together as one.

You can turn it all the way down, which is very dim and hard to see in normal indoor light conditions, but may be preferable in extreme low light conditions like in a nightclub setting, or in complete darkness.

Why isn't there a separate back light setting?
To fully answer this, I would probably have get into more than you ever wanted to know about displays.

First, there is really no background or foreground on today's smart phone displays. The foreground elements and background elements we see on the iPhone are really a graphic illusion created by lighting individual pixels with different colors. All of these pixels are on the same plane, so nothing is really behind or in front of anything else. It's just artistically drawn to look that way.

Brightness is simply an "intensity" setting applied uniformly across all of the underlying individual pixels within the display matrix, and has no relationship to color. For clarity, let's look at the difference between lightness in colors, versus display brightness:

COLOR LIGHTNESS is a matter of how much WHITE (all the RGB colors summed, for example) is present in a given color. This has nothing to do with display brightness.

DISPLAY BRIGHTNESS is a matter of how much LIGHT INTENSITY is applied uniformly across all pixels in the display matrix.

At zero display brightness, you would not see white any better than black, blue, green, red or any other color. You wouldn't see anything.

Why did you expect to be able to control the back light?

Prior to the smartphone era, the displays on early cell phones and pagers (and lots of other devices that had displays) had a lighted background that contrasted with dark foreground elements.

The background intensity was a separate setting on those devices, but that's because the background was the only thing that had intensity. The foreground elements were solid black LCD (liquid crystal display) segments that were used to form characters and very simple graphics and lines.

Everything we see on today's smartphone displays is dynamically drawn by lighting different pixels with different colors at different times. Individual pixels on a Retina display are nearly microscopic in size--they cannot be separately discerned by the eye.

Imagine a matrix of microscopic light bulbs, each of which can separately change to any of millions of colors and levels of brightness at any time, on command. Just imagine the sheer number and complexity of possible commands to control a Retina display!

Even if Apple wanted to provide a new feature that enabled us to separately control the perceived "back light", it would only be an illusion as well.

Such a feature would require some sort of complex algorithm to determine which pixels are involved in what you perceive as the "foreground" elements at any given time, so it could add intensity only to those pixels considered to be "background" at any given time.

Since "foreground" and "background" elements drastically change shape (and location) at any time, such a feature would be pretty daunting to implement.

You might be better off using a pure black graphic as your background image if your goal is to have more contrast to make the app icons stand out.

Cheers,

-=Cameron

Aug 12, 2014 | Apple iPhone4 4G iPhone 4

1 Answer

Adjust brightness ipad


that is a basic thing to know:
  • Open Settings and tap on "Brightness & Wallpaper"
  • Adjust the brightness slider as desired
  • Flip "Auto-Brightness" to OFF to have the screen stop automatically adjusting brightness
adjust-brightness-ipad-fsa0em3gpfye3khtm1m3hcbs-4-0.jpg adjust-brightness-ipad-fsa0em3gpfye3khtm1m3hcbs-4-2.jpg Change Screen Brightness Stop the Display Auto Adjusting on iPhone

Jul 25, 2013 | Apple iPad Tablets & eReaders

1 Answer

I opened my facebook account using iphone.. after using it, it did'nt display anything at all.. just plain light. sometimes the display appears but often times its just pure white light.. what should i do?...


Try knocking your phone with you knuckles at the top right area of your screen while the phone is bright white. If that affects your phone display to come on and off than your ribbon attachment for your picture LCD has come loose. It is somewhat of a common thing. Your phone will need to be opened and have it reattached. Was your phone new from apple or purchased from someone else? It is unlikely that your phone has a virus, are you jailbroken?

Sep 24, 2010 | Cell Phones

2 Answers

My iphone won't turn on it's just a plane black screen, it doesn't do anything and it won't charge either. please help me.


Reset the iPhone by holding the sleep/wake button at the top right of the device and thehome button at the bottom center of the face at the same time. Hold them both until you see the screen go black and the white Apple logo appear. When this happens, you can let go - the iPhone is rebooting.
Resetting the iPhone should not remove or delete any data or settings.
pd

Jan 30, 2010 | Apple iPhone Smartphone

2 Answers

My iPhone 3GS battery died and now I get only a white screen...


Try hard reset
  1. Press the home button (the big circle below the screen) and the sleep wake button (the button on top of the iPhone) simultaneously.
  2. Hold both buttons simultaneously for a few seconds, Ignore the "Slide to power off" and keep holding
  3. The iPhone should now shutdown automatically - (fade to black)
  4. Turn the iPhone back on by hitting the sleep/wake button.
  5. You should now see the Apple logo, your iPhone is restarting and thus booting up.
  6. You have completed a hard reset successfully

Jan 08, 2010 | Apple iPhone Smartphone

2 Answers

Hi, I have an display problem in my Iphone it doesnt show up anything i m able to see jus a white screen even i m not able to switch off my Iphone


Try doing a hard reset, Holding down the home button and the sleep/wake button at the same time until your phone shuts off and turns back on. release both the buttons. If that doesn't solve the issue. Get your phone repaired by either setting up an apple store appointment at apple.com/retail or call 800myiphone(80069474663) to set up a repair

Aug 21, 2009 | Apple iPhone 3G

1 Answer

Iphone display doesn't work after it dropped


You will need to take this phone to Apple. Hopefully you have a warranty. I had the same problem once on my Iphone...It cost me 199 to replace my phone.. i had no insurance. You screen is damaged.Sorry.

May 28, 2009 | Apple iPhone 3G Black Smartphone

1 Answer

The screen won't light up and when the screen slided up the screen display becomes too bright (white) that nothing can be read off it


My MDA loses its settings frequently as well. Go to Start, Settings, System, Backlight, and see what it looks like. Maybe the settings have changed.

Sep 06, 2008 | T-Mobile MDA

1 Answer

Replaced bulb-now very bright white display


go to menu and to screen and adjust brightness and contrast

Jan 27, 2008 | Toshiba TDP-S20U Multimedia Projector

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