OLED pixel circuit and method of alleviating aging of OLED device

A technology of pixel circuit and power supply, which can be applied to instruments, static indicators, etc., and can solve problems such as light-emitting diodes are prone to aging

CN107507568AActive Publication Date: 2017-12-22SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-12-22

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Abstract

The invention provides an OLED (Organic Light Emitting Diode) pixel circuit and a method of alleviating aging of OLED device. The OLED pixel circuit and the method of alleviating aging of an OLED device are characterized in that by setting a first sub-pixel driving unit, a second sub-pixel driving unit, a first reverse bias unit and a second reverse bias unit, and by matching with a simple control time sequence, a first light emitting diode and a second light emitting diode are not maintained in the direct current bias state; and the first light emitting diode and the second light emitting diode can emit light in an alternating manner in different frames, so that the light emitting time of the first light emitting diode and the second light emitting diode can be reduced, and aging of the first light emitting diode and the second light emitting diode can be alleviated, and the display quality of the panel can be improved.
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Description

technical field

[0001] The invention relates to the field of display technology, in particular to an OLED pixel circuit and a method for slowing down the aging of OLED devices. Background technique

[0002] The active matrix light emitting diode (Active Matrix Organic Light Emitting Diode, AMOLED) can emit light by driving the current generated by the thin film transistor (Thin Film Transistor, TFT) in the saturated state. The traditional AMOLED pixel circuit is often a 2T1C driving circuit. see figure 1 , the 2T1C circuit includes two TFTs and a capacitor (Capacitor), wherein, T1 is the drive tube of the pixel circuit, T2 is the switch tube, the scan line Gate turns on the switch tube T2, the data voltage Vdata charges the storage capacitor Cst, and the switch is switched during the light emitting period. The tube T2 is turned off, and the voltage stored on the capacitor keeps the driving tube T1 turned on, and the conduction current makes the light-emitting diode OLED emi...

Examples

Embodiment Construction

[0064] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0065] see figure 2 , the present invention provides an OLED pixel circuit, the OLED pixel circuit includes: a first sub-pixel driving unit 101, a second sub-pixel driving unit 102, a first reverse bias unit 103, and a second reverse bias unit 104 ; Wherein, the first sub-pixel driving unit 101 includes: the first thin film transistor T1, the fifth thin film transistor T5, the first capacitor C1 and the first light emitting...