in LCD, and indeed in the cathode-ray monitors, each pixel is formed by three subpixels strictly defined colors: black, red and green.To get the desired color pixel, the position of the individual sub-pixels, and the direction of the light beam and its power.
«Broken" pixel on the LCD screen appears, if defective TFT , under the control of which it is located.In this case, the "broken" pixel looks like a black point inactive, which does not respond to changing images. Such "dead" pixel is corrected in the home can not be , because the necessary replacement of a defective transistor.
But there is another kind of "broken" pixels - it bright dots that are clearly visible on a dark background .Such pixels are obtained if one of the subpixels as it "stuck" in a certain position.Then, on the background color, in which "stuck" pixel, it is completely invisible.Therefore, to identify a similar problem at first sight is difficult.
To find a "broken" pixels , necessary to carry out certain checks.There are special tools (eg, Nokia Monitor Test), which was tested for the presence of the monitor pixels.The essence of the action of these tools is that the user is offered monochrome images of different colors.By switching the color of the user to visually assess whether there is a screen "broken" pixels.
When choosing and buying a monitor these utilities can be written to a disk or flash-drive and to check the right in the store.After all, the manufacturer allows multiple dead pixels on their products.Max, as well as types of "broken" pixels set standards ISO-13406 .For example, the pixels of the first type - is white on a black background, the second type - black on white, the third type - color pixels (red, green, blue).
In accordance with this standard monitors can be divided into four classes .The first class do not allow the presence of dead pixels.Second - 2 permits the defect type 1 and 2, and 5 of the third type of defects.The displays of the third class may be up to 5 defects of the first type and 15 - the second and up to 50 - the third type.Finally, the fourth class allows monitors 50, 150 and 500 defects the first, second and third types, respectively.
«stuck" pixels , unlike "dead" can try to restore the software or by mechanical manipulation.
essence mechanical method is the physical impact on the "stuck" pixel, whereby he "becomes" in place.To do this, gently massage the defective display area suitable subject, preferably a cotton swab.Fingers or what some sharp objects do "massage" can not - it can damage the antiglare display.
Before starting this procedure, you need to turn off the monitor.After a few minutes of "massage" is necessary to turn it on and look at the result.Repeat the procedure to a few times.
Another option "massage therapy" - use the stylus on the PDA.In this case, the screen is necessary to cover with a clean paper towel or cloth.Stylus is necessary to put as precisely as possible on the defective pixel and not removing it, turn off the monitor.This is followed by gently pressing on the "broken" pixels, and turn on the monitor again.Pressing stop.If the first attempt does not work, you can repeat this cycle again, changing the pressing force and positioning accuracy of the stylus.
Such methods do not give a 100% guarantee , moreover, there is a risk that the pressing is too strong and will be damaged by the neighboring "stuck" pixels.So before you go on a "last resort", you can try to rectify the situation by software.
little trick.If you turn off the monitor of all cables and wires connecting it to the computer and the network, and wait a few days, you should monitor all capacitors fully discharge.After that, when the "stuck" pixels may begin to function normally again.
software to eliminate the "broken" pixels there are different tools. One - jscreenfix, which is available to users on-line directly from the developer's site.After starting, you need to bring the program window onto the defective area of the screen and leave the program running for at least 20 minutes.If after 20 minutes of "broken" pixel is not removed, you can try to run the program for 5-10 hours.
program performs a high-speed change of colors of individual pixels that can align the stuck pixel.
Thus, some kinds of "broken" pixels is still amenable to "cure."However, after that it was not necessary annoyance bite your elbows should be more attentive to the choice of the monitor when you buy and always require the seller to conduct testing on the "broken" pixels.