TV Guide: What do I have when buying a plasma or LCD TVs look out for?
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First of all, unlike is often taught, while in fact there are hardly any “too big”. Ultimately decide budgets, space and tape on the diagonal.
Even SD material as conventional PAL television can contribute to large sizes still considerable, subject, however, a few basic rules that we show below.
High-contrast Foundation
Especially important in flat-screen TVs is an excellent contrast, as the human eye to contrasts very sensitive and have low contrast images emotionless and flat. To this should be used to satisfy the contrast of the plasma or LCD panels have already canceled well in the factory setting, so you have to make only small adjustments if necessary.
The value should be at least 800:1, and are saying how great the difference in brightness between precipitates a black and white pixel. The higher the better. To control the contrast on your screen, should already be taken when buying a so-called test disc. Normally, such a CD contains a variety of grayscale images, checkerboard pattern, a real test photos and much more.
Caution, dynamic event!
Those who rely on the purchase of the advertised in the prospectus, experienced a quick flop. Happy to be advertised for LCD and plasma TVs with only the dynamic contrast. These are the colors and brightness of the displayed image continuously adjusted by the device and, ideally, a very high contrast value can be achieved. Unfortunately, however, it is a very theoretical value, which is usually achieved with a change from a very dark scene, a very bright.
In contrast to the static contrast the claim relates to the dynamic contrast that is not on a still image, but always on the comparison of two successive images or scenes. Take a look at why the manufacturers specifications and ask the seller to determine the static contrast of the device. For the highest dynamic contrast is not much use if colors look unnatural with the corrections or details in dark scenes are barely discernible.
How Black is Black?
The value of a black flat-screen TVs can be best tested in a darkened room. Because of the necessary background lighting, the black looks on most LCD TVs with conventional backlight always a little lighter than plasma screens.
At IFA 2007, Samsung has introduced with the devices of the Q9 series (52 and 70 inches), a new line with LED backlight, which is also based on light-emitting diodes rather than fluorescent tubes (CCFLs). While an LED backlight in the TV area in itself no real advantage over conventional CCFL provides solution here is the feature “local dimming” decisive. The LEDs are divided into many small zones, which can be controlled separately depending on picture content in the illumination. This allows the black level on LCD TVs dramatically increased.
Yet such devices are very expensive, in the coming months, Sony will also follow suit with LED-illuminated flat-screen TVs and Samsung is already planning the successor to the Q9 series.
In broad daylight lighting in major electronics markets, it is unfortunately impossible to test the black level too. It is therefore particularly important to pay attention to a high static contrast.
A uniform image brightness is important, especially in dark scenes, when the image shows through corners, or are unevenly lit lower and upper edge of the screen or the backlight, is suffering the cinema experience. In no bright or dark spots should appear on the screen.
The image brightness must also be sufficient to avoid the TV screen visible even in strong light such as sunlight remains. Mache units offer an automatic regulation of brightness with the help of a sensor. This is not only convenient but also saves energy in passing.
Small and large angle milliseconds
Also of vital importance is the response, a flat screen television, because otherwise the picture looks muddy look to football or tennis balls with the same small comet tail.
Most current models are sufficiently fast and streaks are a thing of the past. The reaction of a modern flat-screen TVs should be ms at 12th
When films are seen with several people, you should absolutely make sure that both the horizontal and the vertical angle of this are large enough. Otherwise, it hails complaints from the people sitting further out. Nearly all flat screen TVs with diagonals from 32 “high panels have wide viewing angles with a sufficient amount.
Only for smaller models, you should ask before you buy after the panel type: a TN panel is installed, you have to reckon with constraints, especially in the vertical angle. Do you want the TV then hung on the wall and look out from the bottom of the device, so you often see only a negative.
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