THRESHOLD VOLTAGE DETECTION CIRCUIT OF OLED DISPLAY APPARATUS

WIPO Patent Application WO/2017/197702

A1

Provided is a threshold voltage detection circuit of an OLED display apparatus. A multiplexer (2) is added between a detection IC (1) and a pixel drive unit (3); a second direct-current signal (Ovss) is set to have a first and a second electric potential, wherein the first electric potential is less than an electric potential of a detection control signal (Monitor), and the second electric potential is greater than the electric potential of the detection control signal (Monitor); the second direct-current signal (Ovss) is switched to the second electric potential when a threshold voltage of a drive thin film transistor (T2) is detected; the second direct-current signal (Ovss) is switched to the first electric potential when a threshold voltage of an organic light-emitting diode (D1) is detected; and at the same time, an electric potential of a data signal (Data) is set to be equal to the electric potential of the detection control signal (Monitor). According to the present invention, threshold voltages of the organic light-emitting diode (D1) and the drive thin film transistor (T2) in each sub-pixel drive circuit can be detected one by one, thereby reducing a leakage current, improving the accuracy of threshold voltage detection, and prolonging the service life of an organic light-emitting diode.

WANG ZHENLING (CN)
HWANG TAIJIUN (CN)

PCT/CN2016/086429

November 23, 2017

June 20, 2016

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SHENZHEN CHINA STAR OPTOELECT (CN)

G09G3/3233

CN105427794A	2016-03-23
CN104732916A	2015-06-24
CN105374308A	2016-03-02
CN105513541A	2016-04-20
US6433488B1	2002-08-13

COMIPS INTELLECTUAL PROPERTY OFFICE (CN)

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