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Topic: Flicker (screen)

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	Flicker (screen) - Wikipedia, the free encyclopedia
		Flicker occurs when the monitor's CRT is driven at a low refresh rate, allowing the screen's phosphors to lose their excitation (afterglow) between sweeps of the electron gun.
		Flicker in software is caused by a computer program's failure to consistently maintain its graphical state.
		This version of flicker is endemic in the Windows operating system in part because of mechanisms that encourage programmers to place intermediate pixel states into video memory, e.g.
	en.wikipedia.org /wiki/Flicker_(screen) (0 words)

	Troubleshooting Screen Flicker - Brookdale Computer Users Group - Atlantic Highlands Herald - Atlantic Highlands, ...
		Screen color changes are almost always a faulty wire in the cable.
		Cell phones are known to cause screen flickers, among other things, and plugging a radio or fan into the same receptacle can also cause screen flickers.
		If the flicker re-mains after checking the cables, environment, display settings, and video adapter, the problem may be within the monitor itself.
	www.ahherald.com /bcug/2002/bs020411_screen_flicker.htm (0 words)

	Flicker-Free Drawing (Site not responding. Last check: 2007-11-04)
		Flicker is the sign of sloppy programming and a lack of attention to detail.
		Flicker is simply this: the display of one image over the top of another in rapid succession.
		The result of this is screen flicker, where you can see one image briefly before another one is shown on top.
	www.catch22.net /tuts/flicker.asp (0 words)

	Flicker - Wikipedia, the free encyclopedia
		Flicker (screen), a fading between frames that occurs on a cathode ray screen at low refresh rates
		Flicker Records, a record label belonging to Sony
		Flicker (pinball table), a 1973 pinball table made by Bally
	en.wikipedia.org /wiki/Flicker (152 words)

	CRT Vs LCD - the verdict
		Screen flicker is caused when your eyes can notice the refreshing of the monitor screen.
		Screen flicker is more than just an annoyance, if you spend any length of time a computer then screen flicker can cause you rather painful headaches and eye strains.
		Her the best LCD screens are acceptable with a response time of less than 20 milliseconds.
	www.pantherproducts.co.uk /Articles/Monitors/CRT_LCD2.shtml (0 words)

	What is screen flicker? - A Word Definition From the Webopedia Computer Dictionary
		Screen flicker results from a variety of factors, the most important of which is the monitor's refresh rate, the speed with which the screen is redrawn.
		Another factor that affects screen flicker is the persistence of the screen phosphors.
		Finally, screen flicker is a subjective perception that affects people differently.
	www.webopedia.com /TERM/S/screen_flicker.html (0 words)

	Prevent Disease.com - Our Brain Sees Screen Flickers, Even if We Don't
		While we may not be conscious of this "screen flicker," new research suggests that certain regions of our brains register these tiny image alterations.
		"Computer screen flicker, when its frequency is low, may induce headache, eyestrain and glare," they explained, especially in people who are prone to headaches.
		The authors found that patients showed increased brain activity when exposed to screen flicker in regions of the brain involved in processing visual information, indicating that portions of their brains were "seeing" screen flicker.
	preventdisease.com /news/articles/brain_sees_screen_flickers.shtml (0 words)

	screen flicker (Site not responding. Last check: 2007-11-04)
		Screen flicker refers to a display screen appears to flicker, which results from a variety of factors such as the monitor's refresh rate.
		Another factor is the persistence of the screen phosphors.
		Screen flicker can also be affected by lighting.
	www.javvin.com /hardware/ScreenFlicker.html (0 words)

	IBM Human Ability and Accessibility Center \| Developer guidelines \| Hardware Self Contained, Closed Product ... (Site not responding. Last check: 2007-11-04)
		Avoid causing the screen to flicker with a frequency greater than 2 Hz and less than 55 Hz.
		Displays which flicker or flash can cause epileptic seizures in susceptible individuals, particularly if the flash has a high intensity and is within certain frequency ranges.
		Do not have the screen flicker with a frequency between 2 Hz and 55 Hz.
	www-306.ibm.com /able/guidelines/peripherals/phwflicker.html (0 words)

	MWAS: 11. Screen flicker.
		Pages shall be designed to avoid causing the screen to flicker with a frequency greater than 2 Hz and lower than 55 Hz.
		Screen items which flicker (blink) must do so either at a rate of less than twice a second or more than 55 times a second.
		Get more help with flicker and moving images, visit NCAM's examples of flicker rate.
	www.wac.ohio-state.edu /standards/mwas11.htm (0 words)

	The PC Guide Discussion Forums - Screen flicker
		A lose cable, bent pins, a bad video card and a few other things may cause what one would refer to as "flicker" but technically speaking, it is caused by a refresh rate that is set to low for a particular resolution.
		I have the same problem which I think is referred to as a flicker, namely, like a very fast interruption of power to the monitor, lasting for a micro split of a second, which is just the same caught by our eye.
		09-01-2004 09:48 AM OK my screen was flickering before and I just changed the refresh rate to 85 from 75 and there is quite a bit of improvement.
	www.pcguide.com /vb/printthread.php?t=27867 (0 words)

	AppleDefects.com :: View topic - Macbook Pro screen flicker at max. brightness
		It just start flicker at very high frequency like if it's changing brightness but is "stuck" between max brightness and lower than a step.
		My white Macbook display flickers occasionally as well, and my display is not on the brightest setting and I'm almost always using in a room with a very stable lighting situation.
		I first noticed flickering when booted into Windows XP, which led me to believe it might be some kind of XP driver issue.
	appledefects.com /forums/viewtopic.php?t=259 (0 words)

	No-one looks at the screen
		LCD screens are better, but reading off screen is always slower and more tiring than reading off paper.
		Also, some people are particularly sensitive to screen flicker.
		Looking at a screen from the same distance for long periods leaves our eyes weak, dry and sore.
	www.webdesignfromscratch.com /no_one_looks_at_the_screen.cfm (0 words)

	Toshiba Laptop Screen Flicker Settlement
		This means that if your Covered Model displays the Flicker Issue, TAIS will fix it free of charge now and for the next 18 months.
		If your Covered Model is already out of warranty but displays the symptoms of the Flicker Issue, you may send your computer to TAIS, and it will be repaired at no cost to you if the symptoms are caused by the FL Inverter Issue.
		If you purchased a Subject Notebook and incurred out-of-pocket costs to remedy the Flicker Issue, you may be eligible to receive a refund for the cost of repair.
	www.lieffcabraser.com /notebook-flicker.htm (0 words)

	Driver causes screen to flicker - nV News Forums
		The flicker is usually too fast to describe; however, sometimes it can be made
		flicker and the length of the white lines.
		He was able to eliminate the flickering by using the
	www.nvnews.net /vbulletin/showthread.php?t=24737 (0 words)

	Screen Flicker during ScreenCondition checks - Indigo Rose Software Forums
		Currently I have these implemented as Screen Conditions but this produces a flicker as the Admin screen loads, checks, fails condition, continues, etc. While it functionally works it just looks bad.
		The screen you may be referring to is the Action Progress screen which displays if any actions are performed during the install.
		With the action progress disabled, when I write a message to the screen (from inside my setup) this is the only visible instance of my setup program.
	www.indigorose.com /forums/showthread.php?t=4608 (0 words)

	Screen Flicker/Refresh - Desktop Sidebar Forums
		I have not attempted to isolate which panel may be causing flicker/refresh, because I shouldn't have to eliminate panels on that behalf.
		It's really sad, 'cause with 2 screens one can fix DS to the second and configure it to "never auto hide" so it's permanently showing on the Desktop.
		I had the same flickering problem, but thanks to NeilN questions i figured what the problem was in my case.
	www.desktopsidebar.com /forums/index.php?showtopic=3198 (0 words)

	NCAM Rich Media : Examples of Flickering Images
		This is intended to help rich media developers develop a sense of what images that flicker at the mentioned rate look like, in order to be able to avoid their use.
		Guideline 7.1: Until user agents allow users to control flickering, avoid causing the screen to flicker.
		People with photosensitive epilepsy can have seizures triggered by flickering or flashing in the 4 to 59 flashes per second (Hertz) range with a peak sensitivity at 20 flashes per second as well as quick changes from dark to light (like strobe lights).
	ncam.wgbh.org /richmedia/media/flicker_demo.html (0 words)

	Select a Pair of 2D Gel Images to Flicker Compare from MCF7 breast cancer cell lines study
		(Note: These images have been placed here at an early stage in their analysis to illustrate application of the Flicker program and to indicate "coming attractions" from this database, not to tell the scientific story involving development of drug resistance).
		Flicker Image Comparison: Flicker is a Java program for comparing two images.
		Flicker home page for more information on Flicker.
	www-lmmb.ncifcrf.gov /flicker/breastDrugFlkPair.html (0 words)

	Avoid Page Elements that Flicker
		There are several reasons to avoid flickering screen elements.
		Elements that flicker between the rate of 2 Hz and 55 Hz may cause seizures in individuals that have photosensitive epilepsy.
		Elements that move may be difficult to view for individuals that use screen magnifying techniques.
	www.doit.wisc.edu /accessibility/online-course/standards/flicker.htm (0 words)

	Nabble - [Audacity-help] Screen flicker
		When a menu item is dropped down and the mouse is dragged over another item, there is a terribly annoying screen flicker.
		The same flicker occurs with the main program window is resized.
		Re-enabling it causes the flicker to become markedly worse.
	www.nabble.com /-Audacity-help--Screen-flicker-t2456499.html (0 words)

	Video/Imaging DesignLine \| How to minimize LCD screen flicker (Site not responding. Last check: 2007-11-04)
		It is a common assumption that CRT screens flicker while LCD screens do not.
		For small screens where the backplane can be considered a low-impedance ground, a single potentiometer can be added for common voltage adjustment.
		Simple potentiometer adjustments can be made to minimize the effect since LCD flicker arises from an offset of the common voltage, not a refresh signal.
	www.videsignline.com /howto/displaytechnology/165700352 (0 words)

	NCAM Rich Media : Examples of Flickering Images
		Guideline 7.1 of the W3C's Web Content Accessibility Guidelines warns against any practice that makes the screen flicker between 4 and 59 Hertz (Hz).
		To determine the exact number of Hertz for an item in question, it is recommended that specialized tools be used.
		If you have photosensitive epilepsy, do not follow this link to the flickering images demo.
	ncam.wgbh.org /richmedia/media/flicker_demo_start.html (0 words)

	Updating the screen without flicker
		This article describes a technique for drawing to a window Device Context (DC) in such a way that the screen does not flicker.
		The solution to this problem is to implement a simple control and use an off-screen device context (DC) to construct the image, which is then copied in total to the client area of the control window.
		FLICKER has window procedures for two controls--one of these flickers; the other one doesn't.
	support.microsoft.com /kb/103214 (0 words)

	HP Pavilion zv5220us Problems w/ touchpad, wireless, screen flicker
		Screen flicker when switching from text mode to graphics mode during startup, but screen works fine in graphics mode.
		I can use all applications OK. Screen flicker also occurs when switching back to text mode using ctrl+alt+bksp.
		when you're at the GRUB screen (where options are to select Linux or Other) type a lowercase 'a' Now you need to type a 'space' and a '1' after the word quiet.
	www.fedoraforum.org /forum/archive/index.php/t-19963.html (0 words)

	Macworld: iBook G3 screen flicker/freeze
		Ihave a problem where the screen either flickers with horizontal pixel lines, or flicks on and off, or simply won't come on or stays off.
		I am wondering however why the screen, say the little wind up thing that is under the apple on startup, freezes.
		I ran an external screen at the same time as the regular one.
	www.macworld.com /forums/ubbthreads/showflat.php?Number=305716 (0 words)

	Core Techniques for Web Content Accessibility Guidelines 1.0
		A flickering or flashing screen may cause seizures in users with photosensitive epilepsy and content developers should thus avoid causing the screen to flicker.
		Seizures can be triggered by flickering or flashing in the 4 to 59 flashes per second (Hertz) range with a peak sensitivity at 20 flashes per second as well as quick changes from dark to light (like strobe lights).
		Collated text transcripts include spoken dialogue as well as any other significant sounds including on-screen and off-screen sounds, music, laughter, applause, etc. In other words, all of the text that appears in captions as well as all of the descriptions provided in the auditory description.
	www.w3.org /TR/WCAG10-CORE-TECHS (0 words)

	Screen Flicker
		I'm sure the problem has nothing to do with your AOL software, and there's no way browser cookies could be involved.
		Flickering and discolorations on the screen are tell-tale signs that you're going to need a new monitor very soon.
		If the flickering stops, your monitor needs to be replaced.
	www.askbobrankin.com /screen_flicker.html (0 words)

	Winthrop Web Services: Accessibility: Section 508 (j) (Site not responding. Last check: 2007-11-04)
		Usability studies show that all Web users are negatively affected by unnecessary screen movement and often attempt to remove the movement from their field of vision.
		To see various screen flicker rates, visit this flicker demo.
		If you would like a test run on your animated gif images, please email the graphic and Web address where it can be found to accessibility@winthrop.edu.
	www.winthrop.edu /web/accessibility/Sec508-j.htm (0 words)

	Annoyances.org - Screen flicker (Windows 98 Discussion Forum)
		My screen seems to have a flicker that I swear was not there a few days ago.
		Can the computer cause this or is my screen faulty.
		I have had 2 or 3 crashes that made my screen go on and off etc. Any help please.
	www.annoyances.org /exec/forum/win98/1018777690 (0 words)

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