Pixel circuit and driving method thereof
A pixel circuit and drive unit technology, which is applied in the field of pixel circuits, can solve the problems that the pixel unit cannot normally display display data, the threshold voltage declines, and the conduction voltage rises.
Active Publication Date: 2018-11-13
AU OPTRONICS CORP
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Problems solved by technology
[0003] In order to solve the problem that the pixel unit cannot normally display display data due to factors such as the degradation of the threshold voltage of the driving transistor, the degradation of the external voltage, or the degradation of the luminous efficiency caused by the increase of the conduction voltage of the organic light-emitting diode due to aging, The present invention proposes an embodiment of a pixel circuit, which includes a first capacitor, an input unit, a driving unit, a first compensation unit, an organic light emitting diode, a switch unit, a second compensation unit and a reset unit
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[0039] see figure 1 , figure 1 It is the first embodiment of the pixel circuit of the present invention, which includes an input unit 11, a driving unit 14, a first compensation unit 13, a switch unit 15, a second compensation unit 12, a reset unit 16, a capacitor C1 and an organic light emitting diode OLED.
[0040] The input unit 11 can be a transistor, namely figure 1 Transistor T1, the transistor T1 has a first terminal, a second terminal and a control terminal, the first terminal of the transistor T1 is used to receive the display data DATA, and the control terminal of the transistor T1 is used to receive the N-level scanning signal Scan[N], N is a positive integer, the second end of the transistor T1 is electrically connected to the second compensation unit 12 and the capacitor C1, and the transistor T1 is used to determine whether to transmit the display data DATA to the transistor T1 according to the N-th scan signal Scan[N] second end. The above-mentioned capacitor...
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The invention discloses a pixel circuit and its driving method. The pixel circuit includes a first capacitor, an input unit, a drive unit, a first compensation unit, an organic light emitting diode, a switch unit, a second compensation unit and a reset unit. The input unit is electrically connected to the first capacitor and the second compensation unit, the second compensation unit is electrically connected to the organic light emitting diode, the first compensation unit is electrically connected to the first capacitor, the driving unit, the switch unit and the reset unit, and the driving The unit is electrically connected to the switch unit and the reset unit, and the switch unit is electrically connected to the organic light emitting diode, wherein the pixel circuit of the present invention can generate a corresponding driving current according to the conduction voltage of the organic light emitting diode.
Description
technical field [0001] The present invention relates to a pixel circuit, in particular to a pixel circuit of an organic light emitting diode and a driving method thereof. Background technique [0002] Compared with liquid crystal display devices, organic light-emitting diode display devices have advantages such as self-illumination, wide viewing angle, high contrast, and fast response speed, and are suitable for use in portable electronic devices that are sensitive to power consumption. In an OLED display device, a pixel unit is used to display display data corresponding to a driving current flowing through the OLED, and the driving current is generated by a driving transistor. However, existing pixel units generally cannot display display data normally due to factors such as degradation of the threshold voltage of the driving transistor, degradation of the external voltage, or degradation of the luminous efficiency of the organic light-emitting diode itself, resulting in po...
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IPC IPC(8): G09G3/3233
CPCG09G3/3233G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0262G09G2320/0233G09G2320/045G09G3/3241G09G2300/0842G09G2310/061
Inventor 刘立伟李建亚
Owner AU OPTRONICS CORP