Quickly gaining momentum and popularity in the flat panel HDTV market, LCD TVs are now being used by homeowners far more than any other. Why? Their offer the advantages of low power consumption and an incredible lightweight design that just adds to the general attractiveness of LCD panel TVs makes them incredibly popular. For movie aficionados, LCD TVs are a fantastic addition to their movie room with an ultra-bright screen and images that seem to just ‘pop out’.
Perfect in this sense, the technology behind this electronic device isn’t perfect.
The skilled LCD repair technicians at Rockland County Computer Repair provide the following common problems that homeowners may face with their flat panel LCD TV.
Ghosting
Older models of LCD TVs had an imperfection in them, ghosting. This imperfection can be described as a trail (on the screen) following objects in motion which give off a streaked effect. Ghosting was actually caused by the response time of the pixels themselves as opposed to some other technical malfunction.
As the pixel is rarely (if ever) completely off, LCD manufacturers fixed this problem by measuring the time it took for pixels to go from gray to gray. This was done to accurately standardize the response time rates.
Contrast Ratio
To control brightness and contrast, LCD technology makes use of backlighting. This creates a contrast ratio dilemma as light seepage (from the backlighting) turns the picture quality dull, increase the gray or even blue black areas on the screen.
It isn’t possible to measure contrast ratio which is why LCD TV manufacturers use their own methods to test it. Judging the contrast ratio that’s provided by manufacturers is the first mistake people make when buying an LCD TV.
Refresh Rate
Hertz is the standardized measurement for refresh rates in LCD TVs. This refers simply as the number of times (in a second) an image refreshes on the screen display. In America, the refresh rate for LCD TVs is 60Hz, which is measured according to the NTSC standard.
The ‘Judder’ Effect
Movies and film uses 23 frames per second to be recorded. Output devices (camcorders, DVD and Blu-ray players) use and send 24 fps signal to display which is how screen is refreshed (at rate of 60Hz).
To make this work, manufacturers use a technique known as the 3:5 pull-down which helps display first two frame for 2 times, the second frame 3 times and then repeats this process for five frames before starting over. This creates the Judder effect which makes fast motion and camera panning in the film or movie recording looks shaky.
Newer models of LCD TVs don’t have these issues but that also depends on the manufacturer. If you do get an LCD HDTV, know that Rockland County Computer Repair’s expert LCD screen repairers will do everything in their power to repair not only your TV but your computer and smart-phones as well. Just get in touch with us today, and we’ll take care of the repairs!