Thursday, December 7, 2023

What is the difference between an LED TV and an LCD TV?

Buying a new TV can be a tedious task, especially if you are trying to decide whether to buy an LED TV or an LCD TV. At first glance, it’s challenging to distinguish an LED screen from an LCD screen. If you are trying to find which is better between LED and LCD, we have covered everything in detail in this article.

The full form of LCD is Liquid Crystal Display. In technical terms, both LCD and LED TVs are liquid crystal displays. The fundamental engineering is the same in both screen types. They have dual polarised glass layers through which the liquid passes and blocks light. Apart from these basic similarities, the structure and material composition are what make them quite different from each other. LED stands for Light Emitting Diode. LEDs are usually composed of extrinsic semiconductors in their core elements. LED TVs use light-emitting diodes, while LCD TVs use fluorescent lights. The placement of lights on LEDs may differ from lights on LCDs. The fluorescent lights in LCD screens are always placed behind the viewing panel. On the other hand, light-emitting diode lights can be fixed around the screen edges and behind the screen. The variation in light elements and light placements make LED panels much thinner than LCD panels. Due to the use of diodes, LED TVs are more power-efficient and produce clearer images than the conventional LCD TVs

Televisions that are made of light-emitting diodes have superior picture quality for two main reasons. First of all, these display panels are built around realistic RGB lights. This enables them to generate better, realistic and clearer images. Colours are more vibrant with deeper blacks. The dimming ability on the back-lighting allows LED screens to project deeper blacks by darkening light sources and obstructing more light from penetrating through the panel. As most LCD panels have thin displays, they have mediocre viewing angles and glare problems. The back-lit LED screens generally have better viewing angles than conventional LCD screens.

Why LED is Better Than LCD

LED technology has some exceptional advantages over conventional LCDs. The most fundamental high point of LED panels is that they produce much more consistent and uniform lighting. The total number of neon tubes in LCD displays is much less than the number of diodes in LED displays. This paves the way for superior picture quality and colour reproduction. The colour contrast is also far higher, generating sharper quality pictures. Due to the use of semiconductor devices in LED screens, power efficiency is very high. The power usage of an average LED panel is about 50℅ less than a conventional LCD panel (under the same usage time).

LCD displays have an average lifespan of about 60,000 hours. On the other hand, LED displays can run up to an incredible 100,000 hours. Light-emitting diode screens are able to produce higher quality images for a longer time without any loss of quality. They are equipped with a better colour palette than LCDs. As colours start to dim, liquid crystal displays begin to show unwanted optical artefacts like black dots. It is primarily due to the inconsistent working of respective neon tubes inside the LCD panel (a consequence of continuous use).

Even though both LCDs and LEDs are predominantly affected by sunlight, LED panels outperform LCDs in terms of adjustable viewing angles and conditions at any period of the day.

LED panels are free of mercury, contrary to other electronic monitors. Mercury is one of the most dangerous elements not only for the ecosystem but also for human health, especially for women. Thus, LEDs are far more sustainable and eco-friendly than most other display technologies.