FIELD OF INVENTION

The present disclosure relates to a display technology field, and in particular, relates to a pixel driving method.

BACKGROUND OF INVENTION

Thin film transistors (TFTs) are main driving components of liquid crystal displays (LCDs) and active matrix organic light-emitting diodes (AMOLEDs). They are directly related to display performance of a flat panel display device.

Most of the liquid crystal displays in the current market are backlight type liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to fill liquid crystal molecules between a thin film transistor array substrate (TFT array substrate) and a color filter (CF) substrate, and a pixel voltage and a common voltage are applied on the two substrates, respectively. Rotation direction of the liquid crystal molecules is controlled by an electric field formed between the pixel voltage and the common voltage to transmit light of the backlight module to display.

Currently, in order to further promote the popularity of LCD TVs, LCD panels continue to pursue low cost and high quality. In order to reduce costs, dual-gate structure display panel becomes an effective solution. Referring toFIG. 1, the dual-gate structure display panel includes a plurality of sub-pixels10′ arranged in an array, a plurality of scanning lines20′ extending in a horizontal direction, and a plurality of data lines30′ extending in a vertical direction. Every two scanning lines20′ connects to a row of sub-pixels10′. Two adjacent columns of sub-pixels10′ respectively connect to data lines30′ adjacent left and right t0the two adjacent columns of sub-pixels10′. Therefore, the dual-gate structure display panel can greatly reduce the number of source drivers (such as four data lines30′ can be connected to six columns of sub-pixels10′), thereby reducing the cost of the liquid crystal panel.

Although the dual-gate structure display panel achieves cost reduction by reducing the number of source drivers, the scanning speed of the display panel has doubled. A faster scan speed will inevitably lead to an increase in the driver IC loading, especially under the overload display screen (such as all red and blue sub-pixels have a gray scale of 0, all green sub-pixels have a gray scale of 255). The source driver that is too hot can be dangerous, causing irreversible damage to the source driver, making it impossible to operate properly. At present, the problem of excessive temperature of the source driver under the overload display screen is solved mainly by adding a heat sink. However, the increase in heat sinks undoubtedly lead to an increase in cost.

SUMMARY OF INVENTION

An object of the present disclosure is to provide a pixel driving method.

To achieve the above objects, the present disclosure provides a pixel driving method, wherein the pixel driving method includes steps of step S1, providing a pixel driving circuit, wherein the pixel driving circuit includes a plurality of sub-pixel groups arranged in an array, each of the sub-pixel groups includes two sub-pixels, and the sub-pixels are arranged in an array; step S2, based on current brightness values of the sub-pixel in row j and column i, and current brightness values of the sub-pixels that have the same color and are adjacent to the sub-pixel in row j and column i, obtaining a target brightness value of the sub-pixel in row j and column i by a target brightness value calculation formula; step S3, obtaining a brightness compensation value of the sub-pixel in row j and column i by a brightness compensation value calculation formula; step S4, based on the target brightness value of the sub-pixel in row j and column i and the brightness compensation value of the sub-pixel in row j and column i, outputting a compensated brightness value of the sub-pixel in row j and column i by a compensated brightness value calculation formula; and step S5, repeating step S2to step S4until the compensated brightness values of all sub-pixels are output.

In one embodiment of the present disclosure, the pixel driving circuit further includes a plurality of scanning lines extending in a horizontal direction and a plurality of data lines extending in a vertical direction; the two sub-pixels of each of the sub-pixel groups are arranged in the horizontal direction, and every two scanning lines connects to a row of sub-pixels, wherein one of the two scanning lines connects to the sub-pixel located at an odd-numbered column in the row of the sub-pixels, the other scanning line connects to the sub-pixel located at an even-numbered column in the row of the sub-pixels; the sub-pixel groups in each column are alternately connected to the data lines that are adjacent left and right to the column of sub-pixel groups.

In one embodiment of the present disclosure, the sub-pixels in each column are sub-pixels that have the same color; three adjacent sub-pixels in each row of the sub-pixels are a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

In one embodiment of the present disclosure, in the step S2, the target brightness value calculation formula is as follows:
TMj,i=(Mj,i+Mj+1,i+Mj,i+3+Mj+1,i+3)/4

Wherein TMj,iis the target brightness value of the sub-pixel in row j and column i;

Wherein Mj,iis the current brightness value of the sub-pixel in row j and column i;

Wherein Mj+1,iis the current brightness value of the sub-pixel in row j+1 and column i;

Wherein Mj,i+3is the current brightness value of the sub-pixel in row j and column i+3;

Wherein Mj+1,i+3is the current brightness value of the sub-pixel in row j+1 and column i+3.

In one embodiment of the present disclosure, in the step S3, based on a difference between the current brightness values of the sub-pixels connected to the data lines that are adjacent left and right to the sub-pixel in row j and column i and a difference between the current brightness value of the sub-pixel in row j and column i and the current brightness value of the sub-pixel located in row j and connected to the same data line as the sub-pixel in row j and column i, obtaining the brightness compensation value of the sub-pixel in row j and column i by the brightness compensation value calculation formula.

In one embodiment of the present disclosure, in the step S3, the brightness compensation value calculation formula is as follows:

Δj,i=∑n=11⁢0⁢Δn1⁢0;

Wherein Δj,iis the brightness compensation value of the sub-pixel in row j and column i;

Wherein Δ1=|Mj,i−Mj,i+1|, Δ2=|Mj,i+1−Mj+,i−2|, Δ3=|Mj+1,i−2−Mj+1,i−1|, Δ4=|Mj+1,i−1−Mj+2,i|, Δ5=|Mj+2,i−Mj+2,i+1|, Δ6=|Mj,i+2−Mj,i+3|, Δ7=|Mj,i+3−Mj+1,i|, Δ8=|Mj+1,i−Mj+1,i+1|, Δ9=|Mj+1,i+1−Mj+2,i+2|, Δ10=|Mj+2,i+2−Mj+2,i+3|;

Wherein Mj,iis the current brightness value of the sub-pixel in row j and column i;

Wherein Mj,i+1is the current brightness value of the sub-pixel in row j and column i+1;

Wherein Mj+1,i−2is the current brightness value of the sub-pixel in row j+1 and column i−2;

Wherein Mj+1,i−1is the current brightness value of the sub-pixel in row j+1 and column i−1;

Wherein Mj+2,iis the current brightness value of the sub-pixel in row j+2 and column i;

Wherein Mj+2,i+1is the current brightness value of the sub-pixel in row j+2 and column i+1;

Wherein Mj,i+2is the current brightness value of the sub-pixel in row j and column i+2;

Wherein Mj,i+3is the current brightness value of the sub-pixel in row j and column i+3;

Wherein Mj+1,iis the current brightness value of the sub-pixel in row j+1 and column i;

Wherein Mj+1,i+1is the current brightness value of the sub-pixel in row j+1 and column i+1;

Wherein Mj+2,i+2is the current brightness value of the sub-pixel in row j+2 and column i+2;

Wherein Mj+2,i+3is the current brightness value of the sub-pixel in row j+2 and column i+3.

In one embodiment of the present disclosure, i is 1 or 2, Mj+1,i−2is replaced by Mj+1,i+4;

Mj+1,i−1is replaced by Mj+1,i+5;

Wherein Mj+1,i+4is the current brightness value of the sub-pixel in row j+1 and column i+4;

Wherein Mj+1,i+5is the current brightness value of the sub-pixel in row j+1 and column i+5.

In one embodiment of the present disclosure, in the step S4, the compensated brightness value calculation formula is as follows:
NewMj,i=Mj,i+ratio*|TMj,i−Mj,i|;

Wherein NewMj,iis the compensated brightness value of the sub-pixel in row j and column i;

Wherein ratio is a compensation coefficient corresponding to the brightness compensation value of the sub-pixel in row j and column i.

In one embodiment of the present disclosure, in the step S5, a displayed image of an overload display screen is converted to a displayed image of a light-load display screen by outputting the compensated brightness value of all sub-pixels.

In one embodiment of the present disclosure, the overload display screen is defined as a display screen where the brightness value of the sub-pixel in column i is greater than or equal to a preset first brightness value, and the brightness value of the sub-pixel in column i+1 is less than or equal to a preset second brightness value, and the first brightness value is greater than the second brightness value.

In the advantageous effects of the present disclosure, in the pixel driving method of the present disclosure, based on current brightness values of the sub-pixel in row j and column i, current brightness values of the sub-pixels that have the same color and are adjacent to the sub-pixel in row j and column i to obtain the target brightness value of the sub-pixel in row j and column i by the target brightness value calculation formula, and then to obtain a brightness compensation value of the sub-pixel in row j and column i by a brightness compensation value calculation formula, and based on the target brightness value of the sub-pixel in row j and column i, the brightness compensation value of the sub-pixel in row j and column i to output a compensated brightness value of the sub-pixel in row j and column i by a compensated brightness value calculation formula. Thus, a displayed image of an overload display screen is converted to a displayed image of a light-load display screen, and the problem of excessive temperature of the source driver under the overload display screen is solved without increasing the cost.

