Image processing method and device

Abstract

The invention discloses an image processing method and device. The method comprises the steps that when it is determined that the polarity of a polar signal of a to-be-displayed image of this frame is the same as that of a polar signal of a to-be-displayed image of the previous frame according to received to-be-displayed images of all the frames and the to-be-displayed image of this frame is static relative to the to-be-displayed image of the previous frame, reducing processing is performed on the grey scale of the to-be-displayed image of this frame according to a preset first compensation corresponding relation. Reducing processing compensation is performed on the grey scale of the to-be-displayed image of the frame of which the polarity of the polar signal is reversed when the static image is displayed, that is, the to-be-displayed image of the frame of which the polarity of the polar signal is the same as that of the polar signal of the to-be-displayed image of the previous frame, therefore, on the condition that the common voltage for image displaying and the display refreshing frequency do not need to be changed, the image flickering problem caused by the overcharging phenomenon which possibly occurs when the static image is displayed can be avoided to the maximum limit, and the side effects such as power dissipation increasing and the nonuniform image quality cannot be brought about.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an image processing method and device. Background technique [0002] At present, the polarity of the data signal loaded on the data line of the display panel (Panel) is controlled by the polarity of the polarity (POL) signal, that is, the polarity of the POL signal determines the polarity of the data signal. Usually, the POL signal When the POL signal is a high potential signal, the data signal is a positive signal, and when the POL signal is a low potential signal, the data signal is a negative signal. Usually, in order to ensure that the polarities of the data signals in two adjacent frames are opposite, the POL signal should be a different high and low potential signal in two adjacent frames. At this time, the inversion mode of the POL signal is called normal (Normal) POL. [0003] Further, in order to reduce and eliminate line afterimages, the inversion method of th...

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[0003] Further, in order to reduce and eliminate line afterimages, the inversion method of the POL signal can also use inversion (Inversion) POL, such as figure 1 As shown, when inverting POL is applied, the polarity of POL signals in two adjacent frames M and N will be the same, that is, when the POL signal in the previous frame is high potential, the POL signal in the next frame should be low potential. However, in the next frame, the POL signal is reversed and turned into a high potential, so that the polarity of the POL in the two adjacent frames is the same. At this time, if a static image with the same or similar image is displayed, the same voltage will be charged in the adjacent two frames. Data signal, at this time, in the frame where the POL signal is reversed, that is, the frame with the same polarity as the POL signal of the previous frame will be overcharged, causing serious flickering, which will affect the display quality of the screen

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