Plasma screens are less common among professionals than among individuals. Indeed, this type of screen works by illuminating noble gases via an electric current. It is this flow of energy that transforms these gases into plasma (hence its name) and produces ultraviolet light. This is then converted into colored light. We find this solution mainly as a television or for professional use.
Advantages and disadvantages
It has the advantage of being less limited in terms of size (up to 3m80 diagonally). Above all, it offers better contrasts, among the most qualitative. It also allows close visibility with superb image quality, and fluid and has a fairly wide viewing angle (+ 160°).
On the other hand, these are heavier screens because of the glass slab, with a reflection effect of the surrounding light sources. They are also sensitive to the phenomenon of persistence of the image once turned off, known as burn-in (caused by fixed images).
They may also exhibit a tingling effect in the image. As they work with a variable electrical current, this can cause higher energy consumption depending on the intensity. Finally, it is a type of screen that is more difficult to produce and therefore relatively expensive.
Reminder: We are talking here about SMD screens as such, and not so-called “SMD” TVs, which are SMD screens with an SMD backlight system.
This type of digital screen works thanks to SMDs which will play the role of pixel or sub-pixel.
These emit their colored light directly. They are then controlled to vary their intensity. The use of SMD technology in screens is also constantly evolving to make them more and more efficient and versatile.
On the other hand, SDM screens have several disadvantages. Particularly in terms of fragility with a fairly short lifespan on average 4/5 years for professional use. They are also limited in terms of size (max 2.8m diagonal) and shape.
Finally, despite the progress made by the integration of SMDs in backlighting, the SMD also tends to lack contrast, especially in black tones.
Advantages and disadvantages
Unlike other SMD Screens have the advantage of emitting their lights. They are therefore visible in direct sunlight with a high quality of contrast and saturation.
In addition, they are more resistant screens, some can last a good ten years. In particular, thanks to the use of LEDs, it consumes less energy. Finally, since they are not dependent on optical filters, they are not limited in size and shape. They can therefore take original shapes and represent several square meters.
giant LED screen zoom
However, the LED screen also has disadvantages. Indeed, the size of the LEDs and the spacing between them can make these screens less suitable for near vision. In general, the majority of LED screens start for visibility from 4 m away. However, this is less and less true with the use of mini-LEDs and micro-LEDs.
Thus, solutions are allowing to see the sharp image of 1.5 m – 2 m. They have therefore preferred display screens for distance vision from a few meters to several tens.
OLED AND QLED SCREENS
This type of screen works similarly to an LED solution. Each diode represents a sub-pixel, but with different basic technology since it is OLED for Organic Light-Emitting Diode or organic light-emitting diode. The light-emitting property of OLED, therefore, does not require the use of a backlight. However, it has a lower light intensity than LED and a shorter lifespan.
OLED digital screens have the advantage of offering excellent image quality, with a very wide viewing angle. In addition, they have the particularity of being able to be very thin, even flexible. However, these screens are complicated to produce, expensive, and therefore better suited to small formats (smartphone, tablet). Finally, like plasma, they are also susceptible to the effect of burn-in.
QLED screens are not an evolution of OLED screens, but a solution in their own right. Moreover, these are closer to LCD screens. Indeed, they work by backlighting.
The Q comes from Quantum-Dot which is a filter applied to an LCD screen to boost its brightness and colorimetry. The name QLED is, therefore, more commercial than a direct reference to its operation.
However, although expensive, this solution has the advantage of being more accessible than OLED.