1/18/2024 0 Comments Backlit vs edge lit led panelHowever, the Chinese giants are not lagging behind South Korean competitors, taking the lead in the mid-budget segment of LCD miniLED TVs with QD. Today Samsung Neo QN90A and LG QNED90 are competing in premium segment. Unfortunately, their price has also reached their level. These two technologies have brought the picture quality of LED TVs to the level of OLED panels. At the same time, high control accuracy is achieved through the use of a huge number of miniature LEDs, grouped into zones of local dimming with separate control. Local Dimming with FALD based on mini LEDs enhances the overall image contrast by controlling the light flow in certain frame areas depending on its content. As known, QD technology expands the color gamut and improves color accuracy by enhancing the white quality for backlight of the RGB layer. Today Samsung Neo and LG QNED series have actually formed a new segment of premium LCD TVs with quantum dot (QD) technology and miniLED backlit. Pros and cons of the Direct-LED and Edge-LED backlights are perfectly demonstrated on this video. Moreover, at CES 2021, the South Korean giants also showed a huge progress by presenting innovative LG NanoCell QNED TVs, and Samsung Neo QLED TVs with Mini LED backlight. This year the company showed the next generation under the name TCL OD-Zero MiniLED. However, over the past few years, the Chinese giant TCL has made a huge leap in the development of this direction, presenting in 2018 TCL 6-Series Roku TV with proprietary Contrast Control Zones technology, 8-Series with mini-LED quantum contrast backlight technology в 2019, and super innovative Vidrian “Glass on LED” technology at CES 2020. This problem is solved by companies with the help of Local Dimming technology that provides independent on/off of individual groups of LEDs in different areas of the screen. Therefore, this technology does not provide the low black level and the high contrast for color transitions (the picture quality is inversely proportional to the black level). LED backlight is always on, and crystals pass light even when closed. LG TVs of 9 series are also equipped with a Direct LED backlight, but its quality is lower. LED Plus, in fact, Edge LED with the option of extended local dimming.ĭirect LED backlight is used in 9 series of Philips and Sony models. For example, FALD (full-array local dimming) and NANO Full LED are improved versions of Direct LED. Therefore, today manufacturers use various innovative solutions, improving Direct LED and Edge LED. Of course, competition between companies is accompanied by a continuous improvement of technology. – models with Edge LED are expensive compared to Direct LED – excessive lighting on the edge of the screen But today it’s less popular because of the high cost that is due to the large number of LEDs. Of course, all sides configuration is optimal for local dimming and ensures maximum depth and uniformity of the black level on the screen. Typically, companies indicate a backlight configuration – all sides, only on one side (usually on top or bottom) or on two sides (usually on the sides). Expensive 4K TVs often have LED stripes on all four edges (all sides configuration). Budget models use only one or two LED stripes on the bottom, top or side. The number and location of LED strips is the main difference. But LEDs for backlight are located at the edges behind the screen. Of course, this backlight is the cheapest and easiest. Therefore, these models are significantly thicker compared to Edge LED. Uniform backlight requires a high-quality optical diffuser that affects the thickness of the matrix container. – relatively large thickness of the matrix. The distance between the LEDs is 3 to 5 inches, depending on the type of LED strip. The LED strips inside the matrix container are arranged parallel to each other. In this case, the light falls on a special splitter, then redirected to the diffuser and dissipates over the surface of the matrix. Direct LED uses LEDs behind the matrix across its surface, and Edge LED uses LEDs along the perimeter of its side surface. It’s subdivided into Direct LED and Edge LED. LED backlight is most popular in modern TVs. In turn, image quality depends on the quality of the LED backlight.Īs known, LCD pixels do not emit light and require a backlight. Of course, the TV choice depends on the image quality.
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