Scanning circuit, display panel and display device

Abstract

The invention discloses a scanning circuit, a display panel and a display device. The scanning circuit comprises a grid driving circuit with a forward and reverse scanning function; the array substrate further comprises a switch control circuit, and the switch control circuit is used for transmitting a second scanning signal to the corresponding stage of pixel rows when each signal output end of the gate driving circuit outputs a driving signal and transmitting a first scanning signal to the next stage of pixel rows in the scanning direction. Thus, no matter whether the gate drive circuit performs forward scanning or reverse scanning, the gate drive circuit is used for transmitting a first scanning signal to a corresponding pixel line and then transmitting a second scanning signal to a corresponding pixel line under the control of the switch control circuit, that is, the time sequence of the first scanning signal and the second scanning signal received by the pixel line is fixed, so that for the pixel line, the same function can be realized in the positive scanning direction and the negative scanning direction. Therefore, the positive and negative scanning function of the display panel can be realized by arranging 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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