Organic Light Emitting Diode (OLED) and active matrix organic light emitting diode (AMOLED) active matrix organic light-emitting diodes (LEDs) are called next-generation display technologies, including Samsung Electronics, Samsung SDI, LG, and Philips. All attach great importance to this new display technology.
What are the relations and differences between AMOLED technology and OLED?
AMOLED
Although LEDs are more common in daily life, each LED is very small in size on the screen and is divided into three sub-pixel groups of red, green and blue, and then forms a different color, and the arrangement of sub-pixels is different. The mode will also affect the entire display. The O in the AMOLED represents Organic, which is “organic.” Simply put, a series of organic thin film materials are used between the positive and negative electrodes to achieve the purpose of light emission.
AM stands for Active Matrix and is relative to Passive Matrix. It refers to the way each OLED pixel is driven. In the Passive Matrix, the control of each pixel is achieved through a complex electrode network to achieve the charge and discharge of a certain pixel. Overall, the control method of the Passive Matrix is relatively slow and the control precision is also slightly lower. Unlike the Passive Matrix, Active Matrix adds TFT and capacitor layers on each LED so that when a certain row is energized to activate the intersecting pixel, the capacitor layer in the pixel can be between refreshes. Maintaining the state of charge enables faster and more accurate pixel lighting control.
OLED
Organic Light-Emitting Diodes (OLEDs) are also called Organic Electro-Luminescence Displays (OLEDs) and Organic Electroluminesence Displays (OLEDs). Liquid crystal display (LCD) is a different type of light emitting principle. OLED was discovered by Ching W. Tang, a Chinese-American professor, in the laboratory in 1983, and began research on OLED. OLED display technology has the advantages of self-luminescence, wide viewing angle, almost infinite contrast, lower power consumption, and extremely high reaction speed. The main advantage of the OLED screen is the high controllability of the pixels, each pixel can be independently switched, thus achieving a more pure black and higher contrast. In addition, power consumption can be reduced by turning off unnecessary pixels when the screen is displayed. At the same time, due to the lower number of internal layers of the screen module, the light transmittance is also better, which is conducive to achieving higher brightness and a wider viewing angle.
OLED screens can be made very thin and ideal for mobile devices such as mobile phones. In addition, due to the lack of a hard backlight layer and with the maturity of flexible plastic substrates, OLEDs have great advantages in flexible screens, giving the mobile devices and even wearable devices more possibilities in terms of form in the future.
The difference between the two
AMOLED belongs to OLED, but the reverse is not. Simply put, OLED technology includes PMOLED and AMOLED. PMOLED does not require a TFT backplane (different from the liquid crystal backplane), but the size can't be done very much; the size of AMOLED can be very large. PMOLED mainly exists in the early dual-screen mobile phones for small external screens. Current mobile TVs use AMOLED technology.
OLED is an organic light-emitting diode. Its light-emitting material is an organic light-emitting material, which is relative to LED light-emitting diodes. As long as the OLED is applied with the correct voltage at the anode and the cathode, it emits light. This is the same as the light bulb. To signal it, he will work.
AMOLED is an active organic light-emitting diode. It not only needs to add signals, but also needs to provide an additional point source so that the diodes can reach the working state. When the bright or dark signal is given, it will light or shut down. It's not a bad analogy. It works like a TV. You give it a wired signal, but you can't see it. You can only watch it. But only power, no cable signals, no programs to see.
OLED also has PMOLED "passive array organic light emitting diode board surface". One is active light control and the other is passive light control. Our cell phone generally refers to AMOLED. The so-called OLED is on the glass substrate of the screen coated with a layer of conductive organic materials (this material is very expensive to say), and then AMOLED is to add AM technology on the OLED panel, active control.
