Introduction of AMOLED

- May 26, 2020-

AMOLED is also called "Magic Screen" and its full name is Active Matrix / Organic Light Emitting Diode, which can be translated as an active matrix organic light-emitting diode panel. 


AMOLED is known as the next generation display technology, including Samsung Electronics, Samsung SDI, LG, and Philips all pay more attention to this new display technology. 


From the perspective of technological development, the basic technologies of flat panel display technologies such as α-Si (amorphous silicon), LTPS (low temperature polysilicon), Oxide (oxide semiconductor) TFT-LCD, AMOLED, and flexible displays are all semiconductor technologies, which are collectively referred to in the industry as Semiconductor display technology. 


AMOLED has a wider viewing angle, higher refresh rate and thinner size than traditional LCD displays used in most mobile phones, so it is being adopted by smart phones. 


The technical origin of this section

Originating from OLED display technology, that is, organic light-emitting diodes, it has the characteristics of self-luminescence. It uses a very thin organic material coating and a glass substrate. When a current passes, these organic materials will emit light. 


The world's first AMOLED integrated touch screen came out in 2010 and was applied to high-end smart models.


How this section works

The basis of AMOLED is organic light emitters. Thousands of light sources that can only emit one of the three colors of red, green or blue are placed on the substrate of the screen in a specific form. These light emitters When voltage is applied, red, green, or blue colors are emitted. The voltage conversion also depends on the TFT. After adjusting the ratio of the three primary colors, various colors can be emitted.


Fold and edit the advantages of this paragraph

Wide color gamut (WideColorgamut)


The color gamut range is simply that the screen can display more colors, the industry standard has NTSC color gamut value

Wide color gamut

, SRGB color gamut value and AdobeRGB color gamut value, etc. In terms of sRGB color gamut, iPadAir can display 96% of the sRGB range, while the SuperAMOLED screen shows that the color gamut range is close to 100% NTSC, which has exceeded the sRGB range and is closer to the higher AdobeRGB standard. The triangle shows the category). The advantage of the wide color gamut is that the colors displayed on the screen look more diverse, which can restore more real colors. The more important meaning is that the contrast can be effectively improved, and you can see shadows closer to the night. 


The traditional Chinese culture calls the "green, yellow, red, white, and black" five colors as true colors, which stands for orthodox and noble, which is what we often say about the five true colors. Thanks to its superb color gamut display capabilities, AMOLED technology can perfectly present these five colors with Chinese characteristics. For example, the performance of yellow, which represents sunlight, and cyan, which represents the growth of all things, between blue and green are satisfactory. 


HighCntrastratio (high contrast)


Compared with the traditional TFT screen, the black displayed by AMOLED is thick and pure black, while TFT is more like dark gray; the white of AMOLED is also pure white, so as to achieve a more transparent display effect. 


Slim design


The AMOLED display is thinner than the LCD display. The LCD display contains a backlight, color filters,

Slim design

Backlight modules and liquid crystal materials, and AMOLED does not need these components because of its self-luminous principle. Integrated touch technology also makes the AMOLED display thinner and lighter. The world's first AMOLED integrated touch screen came out in 2010 and was applied to high-end smart models. 


AMOLED display outdoor readability


It is not impossible to see the maps and addresses in your mobile phone under strong light. Outdoor readability is proportional to chroma X brightness, while OLED chroma is 1.7 times that of LCD. The good outdoor readability of the AMOLED display allows colors to be clearly displayed in bright sunlight, providing a better viewing angle for outdoor reading. 


AMOLED display consumes less energy


The energy consumption of the AMOLED display is significantly smaller than that of the traditional LCD screen.


Each pixel can be controlled independently without constant backlight. When browsing web pages with a white background such as Baidu, most pixels need to emit 100% light. On the other hand, when playing a video with a dark scene, the pixels will reduce light emission. In this case, the emission brightness of the LCD screen is 100%, and the local brightness can be adjusted by controlling the rotation direction of the liquid crystal molecules. Each pixel of the AMOLED display can independently adjust its own brightness, which means that 100% brightness emission is not required, thereby saving equipment energy consumption. Even watching videos or enjoying multimedia will not cause a huge loss of battery life. In an emergency, enable the energy-saving mode with a power consumption as low as 10% to avoid unnecessary pixel energy consumption, and the mobile phone can be used for up to 24 hours. 


Technical advantages


The AMOLED screen is very thin, and the touch layer can be integrated in the screen, so it is more advantageous to be an ultra-thin machine.

The high-resolution AMOLED uses a pentile arrangement. Unlike a traditional LCD, one pixel is equal to the collection of three sub-pixels of red, green and blue, but one pixel = 1 green 0.5 (blue and red), which greatly emphasizes green and makes the picture look more vivid .

AMOLED self-luminous, a single pixel does not work when displaying black, low power consumption when displaying dark colors. Therefore, AMOLED saves power in dark colors, and has a contrast ratio of hundreds of times that of traditional LCDs, and does not leak light.

AMOLED has a certain flexibility, which is not suitable for damage to the LCD screen of the glass substrate.

The color gamut of AMOLED and SUPER AMOLED is very wide.