You are correct that Cheaper TVs are EdgeLit
and expensive TVs are BackLit
.
but then comes even more expensive TVs; the Full Array BackLit TVs
which have FALD (Full Array Local Dimming). FALD is expensive and becomes even more expensive when you increase the number of backlights to increase the Local Dimming Zones. The problem with EdgeLit Tvs are that there is a lot of light bleed from the screen edge. What Hybrid TVs use is one Edge light at the bottom at reduced lighting to avoid light bleeds and then a second one at the centre, which they call a backlight since its not at an edge. Its just marketing but makes a TV perform better than EdgeLit TVs and give it more dimmable zones. My guess, the backlight in 55U7A is where that bump in the back at top 30% is at.
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