The basic structure of the OLED TFT Display Module

The basic structure of the OLED by a thin transparent semiconductor characteristics with indium tin oxide (ITO), and the power of the positive terminal, plus another gold OLED Display

Is the cathode, pack into a structure such as sandwiches. Entire structure layer, which includes: the hole transport layer (HTL), a light emitting layer (EL) and the electron transport layer (ETL)

. When the power supply to the appropriate voltage, the positive hole and the cathode of the light emitting layer, the charge will be combined to produce bright, according to their different formula to produce red

, Green and blue RGB primary colors, constitute the basic colors. OLED is characterized by its own light, unlike TFTLCD require a backlight, so the visibility and brightness

Are high, followed by a low voltage requirements and power saving, high efficiency, coupled with fast response, light weight, thin, simple structure, low cost, is considered 21 COG LCD Display

Century, one of the most promising products.
Organic light-emitting diodes emitting principle and similar inorganic light-emitting diodes. When the element by direct current (DirectCurrent; DC) derived

Forward bias, the voltage applied energy will drive electronics (Electron) and hole (Hole) were injected from the cathode and the anode element, when the two

In the conduction meet, combine, which form the so-called electron - hole composite (Electron-HoleCapture). When the chemical molecules by the outer

To energy excitations, if the electron spin (ElectronSpin) and ground-state electron pairs, for the singlet state (Singlet), they release light

The so-called fluorescence (Fluorescence); Conversely, if the excited state and the ground state electron unpaired electron spin and parallel, it is called triplet

(Triplet), it releases light of a so-called phosphorescence (Phosphorescence).
When the position of the excited electronic state back to steady-state high-order low-energy bands, the energy of a photon, respectively (LightEmission) or thermal energy

(HeatDissipation) emit a way, part of the photons which may be utilized as a display; natural organic fluorescent material at room temperature and

Not observed triplet phosphorescence, so PM-OLED device luminous efficiency of only 25% of the theoretical limit.