Fortunately, more and more manufacturers are relying on OLED panels for their phones. This is a technology that has been with us for several decades on a commercial level ( Samsung E700 from 2003 had an external OLED display)but with the launch of the legendary Samsung i9000, the first Samsung Galaxy S, it really started to attract attention in the mobile segment.

Since then, the market has evolved a lot as well as unified OLED panels. improvements in resolution, response, brightness and starting to really take advantage of their form with the advent of folding cell phones. Then we will tell you with the idea that you know what the technology of the panel of your mobile phone is. What are the most used OLED panel types in current phones?.

oled

An OLED panel (organic light emitting diode or organic light-emitting diode) thousands of self-generating diodes. They have an organic material that responds to electrical stimulation and, ultimately, carbon. allows individual pixels to be turned on and off.

An LCD panel and its variants have a backlight source—backlight—that illuminates the entire panel evenly, as well as other layers that are superimposed to improve features such as contrast.

LCD and BOX

Since this is not on an OLED panel, these are thinner, more “malleable”, requiring fewer layers, they can deliver more vibrant colors, are more efficient, and also achieve better contrast because when a pixel needs to produce a black color it turns off directly. That’s why we have phones with Always-on Display technologies.

Let’s just say it’s the technology the rest of the types of OLED panels we see in cell phones, televisions, virtual reality viewers or watches today are based on, and have been refined over the years to adapt OLED panels. uses more specific.

Curiously, cell phones don’t usually use “basic” OLED screensFor smartphones, however, you can see examples such as the Huawei P50 Pro or Pixel 5, as the technology that we will talk about below is slightly better. And the fact that it’s softer than an LCD allowed us to see a mobile phone like the Samsung Galaxy. Round in 2013 with a stunning curved screen.

AMOLED

AMOLED is a registered trademark of Samsung, in addition to a variant of OLED technology. abbreviations active matrix organic light emitting diode or active matrix of organic light-emitting diodes. Basically like OLED, but with this “active matrix”.

This technology adds an active layer that regulates the current flowing through each pixel, resulting in more precise control of brightness, higher levels and additionally larger diagonals while maintaining energy efficiency and panel quality.

The AMOLED of the original Galaxy S. Look at the green pixels, they are longer and more numerous.

On the matrix, it combines the green pixels between the blue and red ones so that these green pixels are more present, but they are slightly smaller than the other two. And as a result of AMOLED screens, various technologies have been developed.

For this reason, We see Super AMOLED (with a digitizer between the panel layers, not just on the top to increase precision), Super AMOLED Plus (with a matrix more similar to RGB where green, red and blue have the same size) or variations of Dynamic AMOLED (better brightness control and higher HDR capabilities).

Samsung has many technologies and uses them in mobile phones of different formats. Galaxy S23 and Galaxy S23 Ultra have Dynamic AMOLED 2X.

It is the same panel, but in the first case its edges are straight and in the second case it is curved. Galaxy Z Fold 4 or Galaxy Z Flip 4 also use this panel and the format changes completely as it is foldable, making it a highly adaptable technology.

AMOLED

The interesting thing is that AMOLED screens aren’t just for Samsung. The recently launched realme GT3 uses an AMOLED panel, Xiaomi 13 or Honor Magic5 Lite, and we can see these panels in the OPPO Find N2 Flip, which is a direct competitor of the Samsung Flip.

and eye, Samsung supplies screens to Apple for iPhone productionAlthough, as we’ve seen in cases like the iPhone 14 Pro, Apple is making design-level changes for these panels to meet their standards.

P-OLED

LG Wing

Although OLED technology is not from Samsung (Actually Sony was one of the companies that made the most of OLED in its early days), I think it’s clear that the South Korean company is making the most of OLED in both their devices and devices. by selling their panels to third parties.

But, Another important player in this sector is LG.. They don’t make cell phones anymore (LG Wing is one of their newest and weirdest creations), but they do provide panels and have registered P-OLED or plastic oled (polymer light emitting diode).

This is an OLED panel, but matrix substrate is plastic instead of glass. This allows them to be lighter, more flexible (which is why LG did a lot of experiments with curved panels), and slightly cheaper.

As Samsung has cornered the market and has a serious reputational problem with the Pixel 2, there aren’t many phones currently using this type of panel. It was the panel of Google’s choice and there were a few issues like viewing angles. the notorious burn-in issue, which distorts colors (it looked minimally blue).

If that sounds like a lot, wait: there are more types of OLED panels

Returning to the LG Wing, it was a nosy mobile. because it combined two OLED technologies: one screen had a P-OLED panel, while the lower second screen had a G-OLED panel.

We will not go into details about all types of OLED panels. There is because we will not finish it and additionally the aim was to see the main types of panels we have in current mobiles (Samsung dominating the market), but we will give a few lines from each. Have a better idea, general.

• G-OLED – glass oled. This is interesting because it looks very similar to AMOLED with glass as the transmission film, but LG used it for the secondary display of the LG G8s ThinQ and the aforementioned Wing.
• TOLED – transparent oled. Transparent OLED panels. They have a cathode facing one side and an anode reflecting light on the other. When the LEDs are turned off, the panel is 70-85% transparent, and we’ve seen both LG and Xiaomi Mi TV Lux samples.
• SHOE – stacked OLED. It is an OLED panel that ranks the pixels differently. Whereas in a traditional panel each pixel has a red, blue and green subpixel, in SOLED they are stacked on top of each other.
• FOLED – Flexible OLED. The name tells us everything: flexible OLED panels. They are inexpensive to manufacture, as they can be made with a “roll”.
• WOLED- White OLED. Adds a white pixel to traditional RGB. It increases the durability of the panel, but the white pixels absorb a lot of light and the brightness is lower as a result.
• UHPD OLED – Ultra High Pixel Density OLED. The name is pretty self-explanatory and it’s an AMOLED with enormous pixel density. It goes from a pixel cluster at 77.3 microns to 13.4 microns, reaching a monstrous density of 2,228 pixels per inch. Something like this might be ideal for virtual reality glasses, but it’s far from commercialized yet.
• MOLDED – Micro-gap OLED. Trials to implement strong light directionality using dielectric and metallic mirrors began in 1999. This can increase the intensity of the light up to five times. They are not suitable for devices such as mobile phones.
• QD-OLED- Quantum Dot-OLED. This technology is commercializing and Samsung is taking the lead. It is a mix of QLED and OLED that provides higher brightness and a wider color space thanks to quantum dots. Use the blue light to create the other two preselections.

There are other types, but most are experimental. or whose implementation is not possible for technical reasons or simply because later models are better.

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