OLED phase inverting circuit and display panel

Abstract

The invention discloses a phase inverting circuit and a driving method thereof and is characterized in that the phase inverting circuit includes a pull-up unit which is provided with a first power supply input end, a first end, a second end and a third end, wherein the first power supply input end receives a first power supply voltage, the first end receives a first control signal and the third end is electrically connected with a signal output end and outputs a first level signal; a pull-down unit which is provided with a second power supply input end, a forth end, a fifth end and a sixth end, wherein the forth end is electrically connected with the second end of the pull-up unit, the second power supply input end receives a second power supply voltage, the fifth end receives a second control signal and the sixth end is electrically connected with the signal output end and outputs a second level signal; and a first capacitor, wherein a first end of the first capacitor is electrically connected with the second end of the pull-up unit and the forth end of the pull-down unit, and a second end of the first capacitor is electrically connected with the third end of the pull-up unit and the sixth end of the pull-down unit.

Description

technical field [0001] The invention relates to the technical field of OLED display, in particular to an OLED inverting circuit and a display panel. Background technique [0002] In recent years, in the field of display devices that display images, optical devices using current-driven types whose luminous brightness changes according to the value of the flowing current, for example, organic electroluminescent devices (OLEDs) have been developed as light-emitting devices of pixels The display device of the device. Unlike a liquid crystal device or the like, an OLED is a self-luminous device, and in a display device using an OLED, gradation of coloring is achieved by controlling a current value in the OLED. [0003] Like liquid crystal displays, there are passive matrix systems and active matrix systems in the driving systems of OLED display devices. The former is simple in structure, but has disadvantages such as difficulty in realizing a large and high-resolution display d...

AI Technical Summary

Problems solved by technology

But in the above circuit, OUT is connected to VGH and VGL at the same time. If the on / off of TFT is complete, then OUT will only be connected to VGH or VGL. The output voltage of OUT must be VGH as high voltage and VGL as low voltage. However, the above circuit has the problem that two TFTs are turned on at the same time. Because of the effect of voltage division, the output voltage of OUT is the intermediate potential of the two, that is, the high and low potentials at the time of output are in the middle of the two, which will cause insufficient high and low potentials. The continuous power supply of the power supply increases the power consumption. At the same time, the output potential is not enough (input -5V ~ 10V, output -4.43 ~ 5.07V), and the TFT in the pixel cannot be effectively controlled, so that the compensation circuit cannot work effectively

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