DIFFERENCES BETWEEN LCD, LED AND QLED | IWCMC

  • DIFFERENCES BETWEEN LCD, LED AND QLED

    April 12, 2021 By Evette Normand 0 comments

    FROM BEGINNER SOLUTION TO HIGH-END

    Every “LED TV” on the market is basically an LCD TV with LED lighting (LED backlight). The actual screen is a Liquid Crystal Display (LCD panel) whose light comes from LED lighting. After 2010, LED lighting had replaced the previously established fluorescent technology. Skilled marketing strategists used this to form the term LED TV, just for LCD TVs with LED backlight. Every TV manufacturer offers LED/LCD models, and the choice goes from cheap cash-and-carry offers to high-end TV.

    EDGE OR DIRECT LED?

    While the panel is illuminated from the edge of the screen on a simple Edge LED TV, offering hardly any higher contrast than a conventional LCD, direct LED technology can provide this. Many LEDs illuminate the panel from behind, spread over the entire image area. In this way, they ensure uniform illumination with high peak brightness. If real local dimming is added, individual image areas can be illuminated differently in different light, which provides better contrast between dark and light image areas.

    QLED – THE BETTER LCD SOLUTION

    Samsung launched the first TV with QLED technology in 2017. At first glance, this differs only slightly from an LCD with LED lighting: The already mentioned LED backlight happens on the way to the liquid crystals a special film, which is equipped with nanoparticles – so-called Quantum Dots. These react individually to the light rays and thus ensure particularly high contrast values and strong, clean colors. The Quantum Dots radiate a pure red or green (depending on the dot size). For strong blue light, the blue content in the backlight together with the LCD color filters is usually enough.

    This makes QLED backlight perfect for the basic TV colors red, green, blue. One of the great strengths of quantum dot technology is a particularly large color volume, which delivers rich colors even in very bright images. QLED TVs offer higher, stable peak brightness compared to both LED TVs and OLED slated for large-area bright images, which is beneficial for HDR playback.

    HIGH-END TECHNOLOGY FOR HOME THEATER FANS

    The technology of an OLED TV is fundamentally different from that behind LED and QLED TVs. Unlike a TV with LED backlight, the diodes of the OLEDs themselves light up. The so-called organic light-emitting diodes can therefore also switch off individually. As a result, an OLED TV can be the only model to represent “real” black.

    Because while the pixels in LED TVs are permanently irradiated and thus also black image areas are illuminated, these areas can be dimmed to virtually zero in OLEDs pixel by pixel. This type of construction also provides extremely good contrast values and colors that can also exceed the QLED display. For example, when it comes to making directly adjacent pixels glow very differently.

    Another advantage over LED LCD is that the OLED screens guarantee a particularly wide viewing angle. in addition, there is a very uniform brightness distribution on the entire image surface.

    EXPECTED LIFETIME

    However, the best image quality on the market is not without disadvantages. Thus, OLED screens have a limited lifespan and light up slowly. The luminosity decreases gradually and, depending on the model and use, is only 50 percent after 30,000 to 100,000 hours. However, since a daily use of five hours meant even the shortest stated service life of more than 16 years, this should not be of great relevance to the majority of customers.

    With the lighting, however, another, much discussed disadvantage comes into play: If you display bright, static content like bright logos in the same position with the TV for too long, it can happen that certain areas “light up” or “burn in”. Normally, however, the built-in protection mechanisms of the TV sets reliably prevent such undesirable effects. The semi-transparent transmitter logos that are common today are also uncritical.

    LED, OLED or QLED?

    If you want to spend as little money as possible and would like to avoid dealing with the device any further, a normal LED TV makes the most sense for you. Models with 4K resolution and HDR support provide a high-resolution image and sufficient brightness for every room for the “normal” consumer.

    Meanwhile, a film or sports fan who wants the best image quality in the bright living room with little additional effort should take a closer look at Samsung’s QLED TVs. If you are willing to put some money on it for good quality, you are well advised with this display technology.

    These TVs offer all the advantages of the LED TV. It brings better contrast and stronger color for a better value. Just like seo services malaysia they will provide you with SEO and web design services and digital marketing and more bang for your buck.

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