Understand quantum technology of the 1980s used in the LG G4 screen – Info Online

LG announced its new high-end smartphone, the LG G4. In place of the traditional LCD, the device uses the Quantum Display, a panel made up of nano crystals. This technology is used in TVs since 2013 but has been established for many years. In 1985, we already find records of scientific publications of the Soviet Union that indicate a method of nano crystals to use implements that use optics, as is the case of fabrics – in spite of smartphones are still a few decades in the future

used in LG G3, screens with LED technology are popular in various electronics such as monitors, TVs and even digital cameras panels. These screens have a mesh of pixels which receive light from a small lamp behind the panel. So that colors are displayed, the lighting goes by so-called Bayer filter, which is responsible for modifying the light to point us to see 16.7 million colors variants, something that most current offers displays, either LED or OLED .

The image below illustrates the operation of the RGB panel LED backlight. (Fun fact: realize that green is present in more points because the human eye is more sensitive to this color):

Photo by: Wikipedia Commons

On the screen G3 as the other smart phone LCD, the color appears when the white light passes through small red filters, green and blue that make up the Bayer array. You G4, these filters are unnecessary. In its place there is a film comprising nanoscale crystals (also known as quantum dots) that emit light. Tiny variations in the size of these crystals make only very specific colors of light to pass through the screen.

Normally, there is still a kind of backlight, but it is less intense than that used in LCD with LED. This is because there is a filter between the light source and the pixel. Therefore, nano-crystals are more efficient in terms of energy consumption. And in practice, this also means that the display has better contrast than what we see on the LED.

Another consequence of the use of quantum dots that converts into benefits for the user is the color fidelity. And, once again, that is responsible for the absence of the Bayer array.

to be the best filter, similar wavelength lights can end mixing (an orange can intrude into the channel red, for example) when they pass by the array. This does not occur in the nano crystals, block photons due to an effect called “quantum confinement” that arises when the crystal structure is sufficiently small to retain specific wave length. Therefore, the new display technology used by LG offers more color nuances “pure”.

With this, it can be noted that the technology of LG G4 is different from that used on the screen Super Amoled the Samsung Galaxy S6 , which functions as an OLED display. No in-depth analysis with both devices in hand, is difficult to measure how much a screen is actually better than the other.

What we can be sure is improving between the G3 and G4 display. The very LG announced today that the image generated by LG G4 has a 25% brighter, 50% more contrast and color fidelity 20% higher. Other than that, it is more efficient 11% in energy management than the G3

Photo by:. Disclosure

Another factor that should help correct the low range of use of LG’s smartphones is the pannel self refresh technology called. What it does, basically, is to avoid waking the processor when the screen is displaying a static content for a while, for example, text or image. This is a feature which was absent the G3, but was present in G2. Apparently, LG turned back.

In addition to these benefits, the smartphone is worth noting that the color fidelity is standard cinema, more specifically the Digital Cinema Initiatives. This becomes less saturated colors that you see on the Galaxy S6, which covers 110% of that of the standard color space, against 98% of LG device. The changes are mild and may not get to be percepctíveis. But the fact is that the LG G4 screen seems to elevate the image quality batten to a new level.