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| Characteristics |  Native Pixel Resolution
The screen surface of LCD flat panel sets contains a fixed number of pixels. The more pixels the screen has the better. Most LCD TVs 23-inches and up in screen size have at least a 1280x720 native pixel resolution. This is the minimum pixel count you should look for.
Some LCD TVs have such native pixel resolutions as 1280x768, or 1366x768. In addition, you can notice also larger screen LCD TVs with 1920x1080 native pixel resolutions. They are more expensive.
Contrast Ratio
One of the most important factors of LCD TV is contrast ratio, or the degree of variation of the whitest and darkest parts of the image. If the LCD TV has a low contrast ratio, dark images will look muddy and gray, while light images will look washed out.
A good LCD TV offers contrast ratio 1,500:1 or higher. Those LCD TVs which have less than 1,500:1 contrast ratio, especially on a set that is 32-inches or larger, may not provide an optimum viewing experience.
Brightness
Your image will look muddy and soft without sufficient brightness, even in a dark room. Viewing distance, screen size, and ambient room light will affect the need for more brightness capability.
A brightness rating listed as 550 cd/m2 or higher is good, however, don't get bogged down with the technical number listed, just make sure the screen is bright enough for your needs upon your own visual inspection
Scaling
A television's video processor can match the resolution of the incoming signal to its native pixel resolution. This process is called scaling. This means that lower resolution signals will be upscaled, but the processor will downscale higher resolution signals so that they can be displayed at the TVs native resolution.
Poor scaling can result in artifacts, such as jagged edges and inconsistent detail. Results also depend on the quality of the incoming signal.
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