And while the results may be better than CCFL screens, the black levels in edge lighting are not as deep and, if you look closely, the edge area of the screen tends to be brighter than the middle viewing area.
They are large screens made up of thousands of extremely bright LED lights. Although this makes for a thicker TV panel, the LEDs provide more even, brighter colors and greater contrast. However, measurements made from pure-black and pure-white outputs are complicated by the fact that edge-LED lighting does not allow these outputs to be reproduced simultaneously on screen.
This can result in a display that more accurately renders colors in the visible spectrum.
They deliver good colors and brightness, and decent contrast, but not great blacks - the domain of the plasma TV. While there are some drawbacks to edge lighting when compared to full-array or direct backlight displays, the upshot is edge lighting allows for manufacturers to make thinner TVs which cost less to manufacture.
This is especially noticeable in scenes with high contrast, as the dark portions of the picture may appear too bright or washed out. To generate white light best suited as an LCD backlight, parts of the light of a blue-emitting LED are transformed by quantum dots into small-bandwidth green and red light such that the combined white light allows for a nearly ideal color gamut generated by the RGB color filters of the LCD panel.
This is accomplished by selectively dimming the LEDs when that particular part of the picture — or region — is intended to be dark.
Each of these illumination technologies is different from one another in important ways.
LCD TVs? In this method, a series of LED backlights are positioned along the outside edges of the screen. In other words, the greater level of dimming control, the better the picture quality.