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Display Background Light

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How do you change the background color? It is so light you can't see the text.


If you have android tablet got to settings and find display and wallpaper there you can change the background settings

Jul 27, 2016 | Tablets & eReaders

1 Answer

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

Error EF


Hi,

The error code EF displayed on your fi-5750c scanner front panel explains Background switching mechanism alarm. The probable causes are:- Background detection sensor connector disconnected.
- Defective background detection sensor
- BW motor connector disconnected, Defective BW motor
- Defective background unit F
- Defective background unit B

You are rceommended to visit nearest Fujitsu service station for rectification.

Thanks & regards,
ScanCare

Nov 07, 2013 | Fujitsu fi-5750C Flatbed Scanner

1 Answer

Screen returned from supplier background bright pink, how do I change to white background.


To check if the video card or the Sharp LCD monitor is faulty, connect a different monitor to the computer. If this monitor displays a normal image then the video card is OK and the Sharp LCD monitor's back-light is faulty. Send it back to the supplier to have it fixed (they should not have reurned it to you in this condition).
If the other monitor also displays a bright pink background then the video card is faulty and needs to be replaced.

Nov 19, 2009 | Sharp Computers & Internet

1 Answer

Radio display


There is no bulb in the radio to replace it is LED display you will have to replace radio.

Jul 29, 2009 | 1999 Mercury Cougar

3 Answers

LG KU990 display problem


Hi,
I have LG KU990,problem is when I switch it display with one black line in background. When I turn it of it will dissapear. But when I on my phone again it came back.W hat may be problem?

Thanks


--------------------------------------------------------------------------------

May 30, 2009 | LG KU990 Viewty

1 Answer

How to turn off alternating display.


turn off the unit and push the entertainment button or the display button it will beep once flashing stops lol i had the same problome im not sure what button it is thought doesent hurt to try them all its the second one on the bottom of the unit under the display but the unit has to be off

Feb 17, 2008 | Pioneer DEH-P80MP CD Player

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