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23 Eylül 2013 Pazartesi
17 Eylül 2013 Salı
Samsung Led TV information
And why have the boffins decided to go down this route? Well, there
are significant benefits when using LED technology. For starters the
latest designs, such as Samsung LED TVs, can be incredibly thin and even
more gorgeous than normal LCDs. And there are massive performance
improvements: colours tend to be much more dynamic; blacks are much
darker; and colour saturation tends to be more balanced. LED TVs also
consume less energy, so they get the green thumbs up to boot.
LED TV achieves all this by ditching the fluorescent backlighting
systems found in the conventional LCD TVs, which tend to involve just
one lamp. In its place hundreds of smaller LED lights are placed behind
the screen (this is called 'full array' or 'direct' LED TV) each of
which can be separately controlled.
The beauty of this approach is when a picture contains extremes of light and dark, the presence of a single light source (as in a conventional LCD) limits the extent to which you can recreate extremes of bright and shade, in other words contrast. Not so with LED TV.
It's possible to have LEDs switched off and others going at full tilt right next to each other on the same panel - a process called local dimming. This results in much deeper blacks and much brighter whites coexisting within a single frame. LED TV reviews continually refer to this significantly improved contrast ratio. As well as improved contrast, LED TVs also deliver better blacks, as you can simply turn off the LEDs when a scene from a film requires complete darkness. Magic.
Another approach to LED television sees the LEDs placed around the edge of the screen, with their light shining across the back of the screen until it's bounced out toward the viewer by an array of appropriately angled mirrors. This approach is favoured by the likes of Samsung LED TVs. This allows manufacturers to build incredibly slim housings making LED televisions outrageously thin. There are even claimed performance benefits.
And just to be clear, LED TVs are vastly different from the self-illuminating OLED TVs, which use pixel by pixel lighting.
The beauty of this approach is when a picture contains extremes of light and dark, the presence of a single light source (as in a conventional LCD) limits the extent to which you can recreate extremes of bright and shade, in other words contrast. Not so with LED TV.
It's possible to have LEDs switched off and others going at full tilt right next to each other on the same panel - a process called local dimming. This results in much deeper blacks and much brighter whites coexisting within a single frame. LED TV reviews continually refer to this significantly improved contrast ratio. As well as improved contrast, LED TVs also deliver better blacks, as you can simply turn off the LEDs when a scene from a film requires complete darkness. Magic.
Another approach to LED television sees the LEDs placed around the edge of the screen, with their light shining across the back of the screen until it's bounced out toward the viewer by an array of appropriately angled mirrors. This approach is favoured by the likes of Samsung LED TVs. This allows manufacturers to build incredibly slim housings making LED televisions outrageously thin. There are even claimed performance benefits.
And just to be clear, LED TVs are vastly different from the self-illuminating OLED TVs, which use pixel by pixel lighting.
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