Display Principle Of OLED Display Technology

   With the continuous development of science and technology, the display technology of flat-panel TVs is constantly improving, conforming to the trend, relevant experts make predictions, in the near future, OLED panels will completely replace LED panels, becoming the new favorite of flat-panel TVs. Compared with CCFL, LED has great advantages in picture performance. So, what are the advantages of OLED? Today, let's talk a little bit about the display principle of OLED display technology.

  Unlike traditional LCD displays, OLED display technology eliminates the need for backlights and uses very thin organic coatings and glass substrates that illuminate when current is passed through. Moreover, the OLED display screen can be made lighter and thinner, has a larger viewing angle, and can significantly save power.

    The basic structure of an OLED is composed of a thin, transparent semiconductor-tin indium tin oxide (ITO) connected to the positive electrode of electricity, and another metal cathode, which is sandwiched into a sandwich structure. The entire structural layer includes a hole transport layer (HTL), a light emitting layer (EL), and an electron transport layer (ETL). When the power is supplied to an appropriate voltage, the positive hole and the cathode charge are combined in the light-emitting layer to produce light, and three primary colors of red, green, and blue RGB are generated according to the formulation to form a basic color. The characteristics of OLEDs are self-illuminating. Unlike TFT LCDs, which require backlighting, they have high visibility and brightness, followed by low voltage requirements and high power saving efficiency, plus fast response, light weight, thin thickness, simple structure, low cost, etc. It is considered one of the most promising products of the 21st century.

    To illustrate the OLED configuration, each OLED unit can be compared to a hamburger, and the luminescent material is the vegetable sandwiched between them. The display unit of each OLED can be controlled to produce three different colors of light. Like LCDs, OLEDs are also active and passive. The cell selected by the row and column address in the passive mode is lit. In the active mode, there is a thin film transistor (TFT) behind the OLED unit, and the light emitting unit is lit under the TFT driving. Passive OLEDs are more power efficient, but active OLEDs display better performance.

    The advantage of OLED is that it is thin and light, and its thickness is only one-third of that of LCD; because it is solid-state structure, it has better seismic performance and is not afraid of falling; the viewing angle is large, and the picture is still not distorted even when viewed under a large viewing angle; The display time is fast, there is absolutely no tailing phenomenon; the low temperature characteristics are good, and the display can still be normally displayed at minus 40 degrees; the manufacturing process is simple, the cost is low, the luminosity is high, and it can be fabricated on substrates of different materials.