Organic light emitting display device
AssigneeLG Display Co., Ltd.
InventorsMangyu PARK, Zonggun OH, Miso KIM
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Abstract
The present disclosure provides an organic light emitting display device capable of sensing changes in characteristics due to a heat of an analogue-to-digital converting portion to convert sensing voltages corresponding to the threshold values into digital values with the threshold voltages when the threshold voltages of the driving transistors of an organic light emitting display panel are sensed in each horizontal line unit.
Claims17
An organic light emitting display device, comprising:
- an organic light emitting display panel comprising a plurality of pixels with an organic light emitting diode (OLED) and a pixel driving circuit to drive the OLED, and a plurality of sensing lines which are connected to the pixels;
- a data driver comprising at least one data driver integrated circuit (IC) connected to the sensing lines and configured to supply data voltages to the pixel driving circuits through a plurality of data lines disposed in the organic light emitting display panel;
- and
- a controller configured to control the at least one data driver IC to generate sensing data on a threshold voltage of a driving transistor and at least two pieces of thermal property sensing data on changes in characteristics due to a heat of an analogue-to-digital converting portion of the at least one data driver IC, with time intervals, and calculate an amount of changes in threshold voltages of the driving transistors in each horizontal line unit based on the sensing data and the at least two pieces of thermal property sensing data received through the analogue-to-digital converting portion.
A method for driving an organic light emitting display device, the organic light emitting display device comprising an organic light emitting display panel with a plurality of pixels with an organic light emitting diode (OLED) and a pixel driving circuit to drive the OLED, the pixels being connected to sensing lines, a data driver with at least one data driver IC configured to supply data voltages to the pixel driving circuits through data lines disposed in the organic light emitting display panel and to connect to the sensing lines, and a controller configured to control the at least one data driver IC, the method comprising:
- generating, by the at least one data driver IC, sensing data on threshold voltages of driving transistors at a first time point and first thermal property sensing data on changes in characteristics due to a heat of an analogue-to-digital converting portion of the at least one data driver IC;
- generating, by the at least one data driver IC, sensing data on threshold voltages of driving transistors at a second time point and second thermal property sensing data on changes in characteristics due to a the heat of the analogue-to-digital converting portion provided in the at least one data driver IC;
- and
- calculating an amount of changes in threshold voltages of the driving transistors in each horizontal line unit based on the sensing data, the first thermal property sensing data, and the second thermal property sensing data received through the analogue-to-digital converting portion.
Dependencies are inferred from the claim text.