Driving method of display panel, display panel and display device

Abstract

The embodiment of the invention provides a driving method of a display panel, a display panel and a display device, relates to the technical field of display, and aims to avoid a splash screen phenomenon and ensure that the luminance tends to be consistent at different frequencies when scanning is performed at different frequencies. The driving method comprises the following steps: in a first scanning mode, driving the shift register to scan at a first frequency, so that the shift register outputs a first scanning signal with a first pulse interval and a first pulse width; in the second scanning mode, driving the shift register to scan at a second frequency, so that the shift register outputs a second scanning signal with a second pulse interval and a second pulse width; wherein the secondfrequency is smaller than the first frequency, the second pulse interval is larger than the first pulse interval, the second pulse width is larger than the first pulse width, [delta]t is smaller thanor equal to 0.25 [mu]s, and [delta]t is the difference value of the second pulse width and the first pulse width.

Description

【Technical field】 [0001] The present invention relates to the field of display technology, in particular to a driving method of a display panel, a display panel and a display device. 【Background technique】 [0002] At present, the display panel usually includes multiple display modes, such as sleep mode, game mode, etc. In order to save power consumption, the scanning frequency of the shift register is different in different display modes. Frequency scanning, high-frequency scanning in game mode. In view of this situation, there are two driving modes in the prior art: [0003] The first type: at different scanning frequencies, the shift register outputs scanning signals with different pulse widths, but this will result in different writing durations of data signals at different scanning frequencies, resulting in differences in the original brightness, which requires matching different Conditioning data, such as gamma data for correcting the original picture. That is to sa...

AI Technical Summary

Problems solved by technology

However, using this driving method, such as figure 1 as shown, figure 1 It is a structural schematic diagram of a pixel circuit in the prior art. During the light-emitting period within a frame driving period, the potential of the first node N1 drops due to the influence of the leakage current of the reference voltage signal Vref. However, due to the corresponding driving of different scanning frequencies The duration of the cycle is different, so the duration of the potential drop of the first node in a frame driving cycle is also different, such as figure 2 as shown, figure 2 It is a schematic diagram of the attenuation degree of the first node potential corresponding to different frequencies in the prior art. For a high frequency such as 120 Hz, the duration of one frame driving cycle is shorter, and the decrease degree of the first node potential in a shorter light-emitting period is relatively small. is large, and for low frequencies, the duration of one frame driving cycle is longer, and the first node potential has a greater drop in a longer light-emitting period

According to the leakage current formula I=K(PVDD-V N1 -|Vth|) 2 It can be seen that the luminous brightness and the potential V of the first node N1 Inversely proportional, therefore, the luminous brightness corresponding to the low frequency is higher than the luminous brightness corresponding to the high frequency, which leads to differences in the luminous brightness of the display panel at different scanning frequencies, which affects the display uniformity

Images