What is the difference between the AMOLED and LCD screens

[In video] Kézako: The clever functioning of LCD screens with the arrival of HD and 4K in our homes, we have abandoned our.

Everything you need to know about the AMOLED screen on smartphones

Amoled means Active Matrix Organic Light Emitting Diode. This is a display technology that uses organic electroluminescent diodes to produce light in response to electric current. AMOLED screens are considered to be superior quality compared to LCD screens due to their ability to offer deeper blacks and richer colors.

How does the AMOLED screen work ?

An AMOLED screen is made up of millions of pixels, Each composed of three subpixels which emit light of different colors (red, green and blue). When an electric current is applied to each sub-pixel, it emits light to create an image. Unlike LCD screens, AMOLED screens do not need a backlight to produce light, which means that they can extinguish individual pixels to display deeper blacks and save energy.

Advantages of the AMOLED screen on smartphones

The use of AMOLED technology on smartphones has several advantages:

• Riche and more lively colors: Amoled screens are able to produce richer and more lively colors
• More recent and more advanced crops than LCD screens.
• High image quality, black depth and vibrant colors.

Disadvantages of AMOLED screens:

• Expensive
• Likely to burn pixels
• High energy consumption

What is the difference between the AMOLED and LCD screens ?

[In video] Kézako: The clever functioning of LCD screens with the arrival of HD and 4K in our homes, we have abandoned our.

The technical sheets of televisions and smartphones are often very obscure, in particular with regard to screen technologies. What is he hiding behind the appellations Amoled, LCD TFT or IPS ? Here are our explanations.

Whether you choose a smartphone, a TV or a computer instructor, the quality of the screen is one of the primordial criteria. Knowing the different technologies is the best way to make a selection according to your needs and its budget.

AMOLED screen technology

The AMOLED screen (Active-Matrix Organic Light-Emitting Diode) or “Active Matrix OLED OLED” takes up the technical principle of the LCD screen in terms of individual pixels control but by eliminating backlight. Liquid liquid crystals are replaced by electruminic diodes of organic electruminic diodes which produce their own light light under the effect of an electric current electric current . This type of screen is characterized by the intensity of its colors colors, the depth of its blacks (because the pixels are then extinct) and the high level of contrast .

In addition, the absence of backlight reduces energy consumption energy compared to an LCD screen LCD screen and makes it possible to manufacture tiles whose finesse is less than 5 millimeters. The response time being very short (less than 0.1 millisecond), the Amoled slabs do not produce a persistence persistence and offer an ideal fluidity for video games video games .

So much for the advantages, but there are also significant disadvantages. AMOLED screens are much more expensive to produce because it is necessary to avoid any presence of humidity during the manufacturing process. In addition, their lifespan is still largely perfectible (around 40.000 hours) compared to the LCD, in particular due to the degradation of blue subpixels.

Greater than the LCD on many points, the AMOLED screen is handicapped by a production cost still too high and a shorter lifespan. © Alexlmx, Shutterstock

What is the difference between an LCD TFT and IPS screen ?

An LCD screen consists of cells filled with liquid crystals which are illuminated by a backlight while filters are responsible for defining the colors. Each pixel of a screen is made up of three red, green and blue subpixels. There are two LCD screen categories:

• TFT or Thin Film Transistor;
• IPS or in-place Switching Switching .

TFT technology is widespread in computer screens, televisions and mobile terminals. It is based on a slim transistors matrix and an indium-tuan oxide electrode electrode which ensures tension control at each pixel, which helps improve response time and image stability. We are talking about a “active” matrix screen.

IPS technology is an evolution of the TFT which was introduced by the Japanese firm Hitachi in 1996. It uses liquid crystals whose orientation varies to block or let the light from the backlight pass. This process improves the angle of visibility compared to a TFT screen but also to reduce energy consumption. In addition, LCD IPS screens offer brighter whites and more bright colors than TFT.

A screen indicating only the LCD mention uses TFT technology while an IPS screen will mention this technology in its description.

IPS technology is currently the most efficient in the LCD screens category. Gmstockstudio, Shutterstock

In the end, if AMOLED technology is higher than LCD, its still prohibitive cost is, for the moment, the main brake on its expansion. Some models of high -end smartphones and tablets use AMOLED screens. On the side of televisions, except for LG, few manufacturers are resolutely committed to the OLED market. LCD technology still has a bright future ahead.