Driving method of display panel and display device

Abstract

The embodiment of the invention provides a driving method of a display panel and a display device, and relates to the technical field of display, capable of improving the display precision of a low gray scale. The driving method comprises the steps: dividing a frame period of the display panel into N sub-frames, and setting the light emitting duration Ti of each sub-frame, wherein N is a positiveinteger larger than 1, and i is equal to 1-N; according to the target display brightness value L, determining the number k of subframes needing to drive the sub-pixels to emit light, wherein when k issmaller than N, the light emitting duration of any subframe in the k subframes is smaller than the light emitting duration of any subframe in the subframes not needing to drive the sub-pixels to emitlight; according to the target display brightness value L, obtaining a light-emitting brightness value Lemit of a sub-pixel in each sub-frame in the k sub-frames; and in the k sub-frames, driving thesub-pixels to emit light, wherein the light emitting brightness value is Lemit.

Description

【Technical field】 [0001] The present invention relates to the field of display technology, in particular to a method for driving a display panel and a display device. 【Background technique】 [0002] In the prior art, pulse width modulation (Pluse Width Modulation, PWM for short) is usually used to drive the sub-pixels to emit light. Specifically, the width of the pulse can be divided into multiple levels. By adjusting the width of the pulse, the sub-pixels can be driven to emit light with different brightness, and then different gray scales can be displayed. However, since the brightness corresponding to the highest gray scale and the lowest gray scale is quite different, the corresponding pulse width is also quite different. Taking gray scale 1 and gray scale 255 as an example, the brightness corresponding to gray scale 1 is gray scale 255. The corresponding brightness is 1 / 200,000. Correspondingly, the pulse width corresponding to 1 gray scale is also 1 / 200,000 of the pul...

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Problems solved by technology

However, since the brightness corresponding to the highest gray scale and the lowest gray scale is quite different, the corresponding pulse width is also quite different. Taking gray scale 1 and gray scale 255 as an example, the brightness corresponding to gray scale 1 is gray scale 255. The corresponding brightness is 1 / 200,000. Correspondingly, the pulse width corresponding to 1 gray scale is also 1 / 200,000 of the pulse width corresponding to 255 gray scales. However, based on the current technology, it is difficult to adjust the pulse width. Precise control of 1 / 200,000, resulting in low grayscale display accuracy

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