Patent ID: 8988329
Filing Date: 2015-03-24
Classification: G09G

Abstract:
1. An organic light emitting diode (OLED) display device comprising: a display panel comprising a plurality of pixels each having a light emitting element and a pixel driving circuit for independently driving the light emitting element; and a characteristic parameter detecting unit for sensing characteristic parameters of the pixel driving circuit in each of the plural pixels, the characteristic parameter detecting unit driving the pixel driving circuit of one of the plurality of pixels as a sensing pixel, sensing a first voltage output from the pixel driving circuit of the sensing pixel in accordance with characteristics of a driving thin film transistor (TFT) in the pixel driving circuit of the sensing pixel and detecting a threshold voltage (Vth) of the driving TFT using the sensed first voltage, wherein the characteristic parameter detecting unit drives the pixel driving circuit of the sensing pixel using a data voltage compensated for the detected threshold voltage (Vth), senses a second voltage output from the pixel driving circuit of the sensing pixel responsive to driving the pixel driving circuit using the data voltage compensated for the detected threshold voltage (Vth), and detects a deviation of a process characteristic parameter (k-parameter) of the driving TFT using the sensed second voltage.