* Question
| Why do PMOLEDs use a common cathode structure? |
* Answer
| PMOLEDs all use a common cathode structure. This is because the OLED is a current-type device, and the injection current generates a voltage drop across the row and column electrodes, thereby generating Joule heat.The current on the display column flows through the scanned row electrodes.
Since the cathode material of PMOLED is metal, the resistivity of the two is far away, and the square resistance of IT0 is generally lon/E], and the square resistance of Al is about 0.1D./ mouth (thickness 2000A, 1A: 0.1nm), from the point of view of power consumption, it is not difficult to understand by selecting the cathode of the 0LED as the row electrode and the anode as the column electrode. |
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