We’ve found that Mini LEDs can help improve contrast and black levels, and reduce halos around the edges of bright objects displayed against a dark background. 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 has 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.īut most TVs are LCD sets. Last year Samsung and Sony 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. ![]() Before you dive into the individual models, it pays to understand the two basic technologies used in today’s televisions: LCD TVs (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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