In summary, light-emitting diodes (leds) and liquid crystal displays (LCDS) are terms used to describe the type of display technology. Technically, leds use backlight technology instead of fluorescent tubes. Compared to LCD displays, LED displays last longer and can provide sharper, higher-quality images.

The twelve key differences between LED and LCD are detailed:

Step 1: Work

Liquid crystal Display:

As the name suggests, liquid crystal display (LCD) panels use liquid crystals to open and close pixels to display specific colors.

Liquid crystals are similar to a combination of liquid and solid, where an electric current can be used to change their form to trigger a specific response. These liquid crystals can be likened to shutters.

When the blinds are open, light can easily enter the room. In LCDS, as long as the crystals are placed in a certain way, they no longer let light through. The back of the LCD panel is responsible for letting light through the screen.

Located in front of the light is the display with red, green, or blue (RGB) pixels. Liquid crystals are crucial for electrically activating or deactivating filters to show or hide specific colors in pixels.

This means that LCD panels work by blocking light from the back of the screen, rather than CRT screens, which produce their own light. This allows LCD displays and TVS to use much less energy than cathode-ray tube (CRT) models. In 2007, LCD TVS surpassed CRT TVS in global revenue for the first time.

Flat panel video display:

Leds are semiconductor devices that use the laws of quantum physics to convert electrical energy into light energy. As electrons migrate from higher to lower energy states, they produce photons that contain energy. The term for this phenomenon is electroluminescence.

The LED screen consists of a thin layer of highly deformed semiconductor material (i.e., impurities are inserted to regulate the process). Gallium arsenide, gallium phosphide, gallium arsenide and indium gallium nitride can be used as semiconductors for leds.

In an LED, the diode is positive, allowing current to flow along it. This allows electrons in the conductor band of the semiconductor to recombine with holes in the valence band (or the most distant electron orbitals within the atom).

So whenever the combination of holes and electrons releases a lot of energy in the form of heat and light, that energy is used to produce photons. The photons then produce monochromatic or monochromatic light.

Because the semiconductor layer of the LED screen is thin, photons can easily escape the node and radiate outward, resulting in a vivid color display.

2. Backlight

Liquid crystal Display:

LCDS use fluorescent lighting to display images on the screen by illuminating a crystal solution that blocks or allows light to pass through to create an image.

They need a light source because they don't emit light themselves. Traditionally, cold cathode fluorescent lamps (CCFL) provide light sources for LCDS, but have been replaced by other light sources such as leds or electroluminescent panels (ELPs).

Flat panel video display:

Backlight is a form of lighting used in leds and LCDS to illuminate a screen display. Display devices such as monitors or TVS can provide low-quality or dim images without backlighting.

Unlike LCDS, LED displays produce their own light. They used light-emitting diodes as a light source to illuminate the crystal solution from behind, creating an image on the screen.

3, the type of lighting and positioning

Liquid crystal Display:

LCDS require light sources to illuminate the crystals to create an image on the screen, as they do not produce light like other displays, such as plasma or cathode-ray tube displays. This light source can be located behind the screen or at the edge, depending on the screen type.

Importantly, LCDS usually place a light source behind the screen.

Flat panel video display:

Unlike LCDS, devices may light up from the back or from the edge of an LED display.

The direct-down LED display lights up from the back. This type of lighting eliminates the need for a separate backlight, making the display more energy efficient. When the light source is located at the edge of the screen, it is called a side-lit LED display.

In this type, the light can be directed to the center of the display by using a light guide plate to ensure that the light is evenly distributed.

4. Image quality under different viewing angles

Liquid crystal Display:

Viewing Angle refers to the maximum Angle from which a consumer can view a display display with acceptable visual performance. Outside of this Angle, the display displays images with poor contrast, brightness, or blurring.

LED and LCD manufacturers face the challenge of reducing the rate of change in hue and saturation while maintaining the RGB percentage of a particular image, regardless of the angular position relative to the center of the screen.

In general, the viewing Angle of the LED display is wider than the LCD, up to 178 degrees, so that consumers can see the image clearly from different angles.

Flat panel video display:

Leds support smaller viewing angles than LCDS, which can affect image quality under certain conditions. The viewing Angle of the LED is 120-160 degrees.

It is important to note that the image quality of an LED display may not be as good as that of an LCD when viewed from a regular vertical Angle.

5. Application in TV wall

Liquid crystal Display:

Video walls are also known as display walls. Modern video walls use spliced LCD panels, direct LED splicing, or rear projection tubes to minimize bad spot space between different displays.

Video walls with multiple spliced LCD panels have a narrow viewing Angle and provide high resolution with bright colors. However, they are not as bright as displays made from LED displays and are therefore suitable for use in control rooms.

Flat panel video display:

Video walls made of multiple direct LED splicing blocks have a wide viewing Angle and provide high-resolution images with accurate colors. These bright video walls are suitable for outdoor Spaces such as stadiums, concert halls and shopping malls.

The border of the LCD splice block can cause gaps and visual obstacles, while the LED splice block has an excellent uniform, bezel-less appearance, making LED a popular choice for splice display systems.

6. Game apps

Liquid crystal Display:

Consider a monitor with low response time, high refresh rate, in-plane switching (IPS) panel technology, and high motion video (HDR) capabilities - it would be an ideal monitor for gaming. LCDS can't lag behind leds in this regard, but they are also cheaper.

While LED and LCD displays can provide gamers with an immersive gaming experience, they differ in performance.

Gamers should strive to get value for money by striking the right balance between performance and price.

Flat panel video display:

LED displays have higher refresh rates, resulting in better performance in graphics-intensive games and minimization of latency and ghosting issues. They have IPS panels that display colors more accurately, wider color gamut, and dimming capabilities.

An LED display with high-resolution display resolution (HDR) technology is an advantage, as it can produce amazing quality game images. They also have shorter average response times, which allows for more pronounced movement.

Finally, one should consider buying LED monitors for the best gaming experience, as they score higher on these basic parameters than LCD monitors.

7. Picture quality

Liquid crystal Display:

Factors such as resolution, color accuracy, brightness, contrast, and viewing Angle affect the image quality of leds and LCDS.

It is important to note that LCD displays can produce high-quality images, but not as good as LED displays. However, when viewed at a vertical Angle, their image quality is reduced, which is a parameter that LCD is superior to LED.

Flat panel video display:

LED displays produce higher quality images because they are superior to LCDS on most parameters except viewing Angle.

For example, in terms of color accuracy, full-color LED displays have a wider color gamut, ensuring less color distortion and producing realistic images. They also display images with higher brightness and contrast.

LED displays also have higher refresh rates and render rates, resulting in sharper images.

8. Differences in energy efficiency

Liquid crystal Display:

The power consumption of leds and LCDS varies depending on the display's resolution, screen size, manufacturing quality, screen brightness, and energy saving Settings. Older LCD models that use cold cathode fluorescent lamp (CCFL) backlighting consume more energy than modern LCD models that use LED-backlit LCDS.

A larger, higher-resolution display consumes more power. In addition, animations that display a lot of motion consume more energy than static pictures. Similarly, the higher the screen brightness setting, the more power it uses.

Flat panel video display:

When all factors (including consumer usage) are held constant, LED displays are more energy efficient than LCD displays because they use less power to produce the same amount of light.

In addition, consumers can activate the Power saving mode to save more energy.

9. Be environmentally friendly

Liquid crystal Display:

Environmental friendliness refers to the impact on the environment during the production, use and disposal of LCD and LED displays. Leds and LCDS can have a significant impact on the environment, especially given how they are manufactured and how consumers dispose of them after use.

Compared to older models that use cathode-ray tubes (CRTS), LCDS are more environmentally friendly because they consume less power, last longer, and reduce waste.

However, LCD contains trace amounts of mercury, which is harmful to the environment and can cause pollution after treatment.

Flat panel video display:

Of the two, LED displays can be considered the more environmentally friendly option, as they weigh less and therefore consume less fuel during transportation.

They also consume less power and have a longer operating life. LCDS contain trace amounts of mercury, which is harmful to the environment and can cause pollution after treatment.

10. Shelf Life

Liquid crystal Display:

When considering which type of monitor to buy, especially a TV monitor or workstation monitor, the key is to consider its lifespan.

LCD and LED displays typically have a relatively long service life because they do not have moving parts that are prone to wear (such as hard drives). The average shelf life of LCDS is 50,000 hours.

Flat panel video display:

LED has a maximum expected working life of up to 100,000 hours. Exposing LED displays to heat and humidity may shorten their service life. This is due to the fact that the diode's performance degrades faster when exposed to high temperatures.

The type of content you consume also affects the lifespan of your monitor. For example, engaged in graphic heavy tasks such as computer-aided design (CAD), there will be a large number of color changes over a long period of time, which will affect the life of the diode, thereby shortening the service life.

11. Price point and affordability

Liquid crystal Display:

LCD displays are definitely more affordable than LED displays. This is because they take longer to get to market and are cheaper to produce.

The price of LCD and LED displays will also increase with the increase in screen size and resolution. Different models and manufacturers of monitors also have different prices.

Flat panel video display:

LED displays are expensive because they use cutting-edge technologies such as IPS panels and side-lit backlights, and they consume less energy. In addition, the intended use of LED displays will drive up prices.

For example, gaming LED displays are more expensive than typical workstation displays used by Web developers because they are built and optimized to handle even the densest graphics, providing gamers with an immersive experience with ultra-realistic images.

12. Differences in size and shape

Liquid crystal Display:

Manufacturers use standard shapes and sizes to make LCDS, which limits consumer choice. Therefore, unlike LED, LCD has no application in areas such as digital signage.

In addition, LCD displays with CCFL backlit lighting take up more space than LED displays with backlit technology, so the display is thicker.

Flat panel video display:

Consumers have a variety of shapes of LED displays to choose from to meet their needs. They can buy creative leds, such as spherical LED displays, curved LED displays, flexible LED displays or foldable LED displays.

In addition, side-lit LED displays are thinner than backlit LED displays.

conclusion

Despite significant advances in display technology (e.g., the rise of organic leds or OLeds), LCDS and leds are still the dominant products for computing displays. Leds are used more in TVS and signage, while LCD screens are a staple of regular workstations and desktops. However, even LED displays are reasonably priced these days, making IT harder for IT managers to choose. By understanding the differences between LED and LCD technologies, you can make the right decision for your needs.