Pixel driving circuit of organic light-emitting diode

A technology of pixel drive circuit and light-emitting diode, which is applied to instruments, static indicators, etc., and can solve problems such as different brightness, inconsistent drive current values, and uneven images
CN101996582AActive Publication Date: 2011-03-30AU OPTRONICS CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AU OPTRONICS CORP
Publication Date
2011-03-30

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Abstract

The invention discloses a pixel driving circuit of an organic light-emitting diode, which comprises a first transistor, a capacitor, a second transistor, a third transistor, a fourth transistor, a fifth transistor and an organic light-emitting diode. The operation of the pixel driving circuit mainly comprises three stages, including discharging, data writing, driving lighting. The pixel driving circuit compensates critical voltage of the transistor in the data writing stage so that the driving current of the organic light-emitting diode is unrelated to the change of the critical voltage.
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Description

Technical field

[0001] The invention relates to a pixel driving circuit of an organic light emitting diode, in particular to a pixel driving circuit of an organic light emitting diode capable of compensating for the critical voltage of a transistor. Background technique

[0002] Please refer to figure 1 , figure 1 It is a schematic diagram of a display panel of an organic light emitting diode (OLED) in the prior art. The display panel 10 includes a data driver 11, a scan driver 12 and a display array 13. The data driver 11 controls the data line DL 1 To DL n , And the scan driver 12 controls the scan line SL 1 To SL m . Display array 13 is composed of data line DL 1 To DL n And scan line SL 1 To SL m It is formed by interleaving, and each interleaved data line and scan line forms a display unit, for example, the data line DL 1 And scan line SL 1 The display unit 14 is formed. Such as figure 1 As shown, the equivalent circuit of the display unit 14 (other display units are the s...

Claims

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