Apparatus, method, and control method for driving led with ac power

A light-emitting diode and power-driven technology, which is applied to the device and control field of driving light-emitting diodes with alternating current power, can solve the problems of shortening the life of organic light-emitting diodes and the like
CN1525428AActive Publication Date: 2004-09-01AU OPTRONICS CORP
0 Cites 6 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AU OPTRONICS CORP
Publication Date
2004-09-01

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention is a device and method for supplying alternate current power to active matrix organic brightening diode. The polarity and voltage supplied for active component such as film transistor in order to drive the active matrix organic brightening diode can be changed into reverse one or the voltage value is changed in a special period; in the next period, the changed power will be changed into the original state.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a circuit and method for driving an organic light-emitting diode with alternating voltage or current. Background technique

[0002] Many displays for presenting information are based on light emitting diodes, which include organic light emitting diodes and active matrix light emitting diodes.

[0003] Generally speaking, the driving voltage of the OLED will increase with the working time, and the brightness of the OLED will decrease accordingly. In addition, the change of the terminal voltage connecting the OLED to the thin film driving transistor will also affect the brightness of the thin film transistor. Work.

[0004] Once the voltage of the thin film transistor (such as the drain or source voltage) changes, the driving current of the thin film transistor under the same grayscale data input will decay, which will gradually reduce the brightness of the display.

[0005] Please refer to figure 1 , in a typical OLED display...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More