A scanning circuit, a display panel and a display device

Abstract

The invention discloses a scanning circuit, a display panel and a display device, wherein the scanning circuit includes a gate drive circuit with positive and negative scanning functions, and a switch control circuit, wherein the switch control circuit is used to drive When each signal output end of the circuit outputs the driving signal, it transmits the second scanning signal to the pixel row of the corresponding stage, and transmits the first scanning signal to the pixel row of the next stage along the scanning direction. In this way, regardless of whether the gate drive circuit is scanning forward or backward, the switch control circuit controls the gate drive circuit to first transmit the first scan signal to the corresponding pixel row, and then transmit the second scan signal, that is, the first scan signal received by the pixel row The timing of the first scanning signal and the second scanning signal is fixed, so that for the pixel row, the same function can be realized in both positive and negative scanning directions. Therefore, the embodiment of the present invention can realize the forward and reverse scanning function of the display panel by setting the scanning circuit.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a scanning circuit, a display panel and a display device. Background technique [0002] Organic light-emitting diodes (Organic Light-Emitting Diode, OLED) have the advantages of self-illumination, wide color gamut, high contrast, light and thin, etc., and have been widely used in display devices. [0003] In an OLED display panel, generally, a pixel unit is provided with an OLED and a pixel circuit for driving the OLED to emit light. When the pixel circuit drives the OLED to emit light, generally at least two different scanning signals are required for control, one scanning signal is used for initialization control of the pixel circuit, and the other scanning signal is used for compensation control of the pixel circuit. For example figure 1 The pixel circuit shown includes 6 switching transistors: M1~M6, 1 driving transistor M0 and 1 capacitor C. The corresponding input timing...

AI Technical Summary

Problems solved by technology

If the gate drive circuit performs reverse scanning, for the pixel unit Pixn' in the same row, it first receives Scan2' provided by the shift register unit VSRn', and then receives Scan1' provided by the shift register unit VSRn-1', so that For the pixel circuit, it is equivalent to the initialization control after the compensation control, that is, the pixel circuit initializes the data after writing the data, and uses the initialized data when displaying, so when the OLED display panel is displayed, it is quite Since each pixel unit displays the same data, the OLED display panel cannot display normally when scanning in reverse.

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