Organic light-emitting diode display device

Abstract

Discussed herein are an OLED display device and a method of driving the same. The OLED display device includes according to an embodiment an organic light-emitting diode; a driving transistor involved in driving the organic light-emitting diode and including a bottom gate electrode, an oxide semiconductor layer, a source electrode, a drain electrode and a top gate electrode; a first switching transistor electrically connected to the bottom gate electrode of the driving transistor and involved in transmitting a data voltage to control the driving transistor; a storage capacitor electrically connected to the bottom gate electrode and involved in charging the data voltage; a second switching transistor configured to store a threshold voltage in the storage capacitor; a compensating transistor directly connected to the top gate electrode of the driving transistor to compensate for a deviation in the threshold voltage of the driving transistor; and a compensating capacitor disposed between the source electrode of the driving transistor and a source electrode of the compensating transistor and storing the threshold voltage therein.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to Korean Patent Application No. 10-2016-0062959 filed on May 23, 2016 at the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to an organic light emitting diode (OLED) display device and a driving method thereof. Background technique [0004] Recently, various flat panel display devices capable of alleviating disadvantages of cathode ray tubes, ie, reducing weight and volume, have been developed. Examples of flat panel display devices include liquid crystal display (LCD) devices, field emission display (FED) devices, plasma display panel (PDP) devices, organic light emitting display devices, and the like. [0005] Among these flat panel display devices, organic light emitting display devices display images using organic light emitting devices that generate light as electrons and hol...

AI Technical Summary

Problems solved by technology

[0008] This type of AMOLED device has the advantage of low power consumption, but has the disadvantage that there are deviations in characteristics such as the threshold voltage and mobility of the driving transistor used to drive the organic light emitting diode

[0012] More specifically, when a compensation circuit is added to each pixel as described above, the transistors and capacitors of each pixel and the signal lines for controlling these transistors increase, so that the aperture ratio of the AMOLED panel decreases

In addition, the number of components of the circuit increases, so there is a disadvantage that defects are more likely to occur

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