Driving method and device of active matrix organic light emitting diode (AMOLED) panel

Abstract

The present invention relates to a driving method and device of an AMOLED panel. The driving method of the AMOLED panel comprises a step 10 of detecting the temperature of a detection point of a display panel; a step 20 of calculating a driving current corresponding to the temperature according to a preset function relationship of the temperatures of the display panel and the driving currents; a step 30 of comparing the driving current and a preset threshold current to obtain the compensation gain of the driving current; a step 40 of adjusting a data signal and a gamma signal for driving the display panel according to the compensation gain of the driving current; a step 50 of real-timely detecting the brightness of the display panel, when the brightness attenuates to a preset threshold value, compensating the brightness to the initial brightness by improving the driving current. The present invention also provides the corresponding device. According to the driving method and device of the AMOLED panel provided by the present invention, under the premise that the driving current of the panel is constant, by an OLED service life promotion algorithm, the service life of the OLED panel can be prolonged, and further the accuracy of a service life promotion model of an OLED device is guaranteed.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a method and device for driving an AMOLED panel. Background technique [0002] Organic light-emitting diode (OLED) display devices have many advantages such as self-luminescence, low driving voltage, high luminous efficiency, short response time, and wide operating temperature range, and are recognized by the industry as the display device with the most development potential. [0003] The installation and driving methods of OLED display devices can be divided into two categories: passive matrix OLED (PMOLED) and active matrix OLED (AMOLED). Among them, AMOLED has sub-pixels arranged in an array, which belongs to the active display type. High, usually used for high-definition large-size display devices. Each light-emitting unit in an AMOLED is independently controlled by thin-film transistor (TFT) addressing. The pixel structure composed of the light-emitting unit and the ...

AI Technical Summary

Problems solved by technology

However, when the panel is actually working, due to the increase of the panel temperature, the driving current will increase, resulting in deviations in the brightness and time aging compensation model of the OLED.

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