![]() Some newer sets have Mini LED backlights, which use a large number of even smaller LEDs that can be divided into more zones and locally dimmed. These models include a feature called local dimming, which divides the backlights into zones that can be dimmed or illuminated separately, depending on the scene. While they generally can’t deliver OLED-like black levels, they get better every year, especially models that use full-array backlights, where the LEDs are spread across the entire rear panel instead of just along the edges. (CR conducted side-by-side testing of OLED and QD-OLED TVs.) And, this year, LG, which makes OLED TVs using a different technology (called WOLED) is promising to boost brightness on its best models. There’s a big wrinkle in the technology that started last year: Samsung and Sony have introduced a new type of OLED TV, called QD-OLED, that can produce a brighter overall image. OLED TVs also have essentially unlimited viewing angles, so the picture still looks great even if you’re not viewing the screen head-on. OLED sets do a great job of displaying the blackest parts of an image, so the deepest shadows can really look black, as in real life, rather than gray. ![]() ![]() There are far fewer OLED TVs on the market, and they tend to be more expensive, though prices have dropped over the past couple of years. Before you dive in to the individual models, it pays to understand the two basic technologies used in today’s televisions: LCD TVs, which are also called LED TVs for the LED backlights that illuminate the screen, and OLED TVs, where each pixel generates its own light.
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