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Anyone seen an LED backlit LCD? |
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#1 |
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Forum Member
Join Date: Sep 2004
Posts: 4,727
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Anyone seen an LED backlit LCD?
You can get LCD TVs now that have LED backlights which dim parts of the screen where the picture is dark to improve the blacks. Where one part of the screen is black (backlight dimmed) and the neighbouring part is black with a bright area such as a titles (backlight not dimmed and therefore blacks the usual grey), what does the boundary look like? If its a sharp boundary, where one block of pixels is black and the neighbouring block of pixels is grey I expect that would be very distracting. If its more diffuse (which seems most likely given that the backlights will probably be behind a diffuser) that would look more natural, but it must give the TV a headache working out the combined effect of the backlight and pixel if the lighting of pixels near the area boundaries is influenced by more than one backlight (up to 4, I guess, at corners). Anyone seen these in action?
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#2 |
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Join Date: Apr 2006
Location: North Derbyshire
Posts: 41,794
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I think LED backlighting is more future technology than current, but modern CCFL sets dim the back lights anyway, in keeping with the overall brightness level of the screen - this is one of the things that gives modern LCD's such good contrast ratios.
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#3 |
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Forum Member
Join Date: Mar 2004
Posts: 1,905
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http://www.homecinemachoice.com/blog...ith+led+lcd+TV
A first review of a Samsung with LED backlighting, however agree with Nigel's comment, it's more 'future' technology, and it may not be worth going for the first sets on the market as invariably the quality improves as the technology becomes more widespread. |
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#4 |
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Guest
Join Date: Mar 2000
Posts: 62,990
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is there much difference in the technology for tvs than laptop screens? the screens on macbooks (and others i expect) are LED backlit, and look excellent.
Iain |
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#5 |
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Inactive Member
Join Date: Jul 2007
Posts: 8,063
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i'm sure the pixels that are progressively further from the dimmer region have to compensate for brightness variation with compensated settings. thats just a guess.
the best tech is both led backlight AND RGB led triads since that reproduces more color spectrum than white leds. |
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#6 |
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Forum Member
Join Date: May 2003
Posts: 118
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Quote:
is there much difference in the technology for tvs than laptop screens? the screens on macbooks (and others i expect) are LED backlit, and look excellent.
Iain |
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#7 |
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Forum Member
Join Date: Jul 2005
Posts: 7,052
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I guess the ultimate would be 1:1 mapping on a LED to pixel so stop the halo effect but in all honesty I haven't seen this.
Its motion that bothers me more. |
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#8 |
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Forum Member
Join Date: Sep 2004
Posts: 4,727
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Quote:
I guess the ultimate would be 1:1 mapping on a LED to pixel
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