This application claims priority to Chinese Patent Application No. 202311523967.3, filed on Nov. 14, 2023, the disclosure of which is incorporated herein by reference in its entirety.
The present disclosure relates to display technologies, and in particular, to a driving method of a display panel and a display device including the display panel.
Due to a limitation of manufacturing process, a pixel of an existing display panel cannot be accurately positioned in the middle between two adjacent data lines. The unequal distances between the pixel and the two adjacent data lines result in different coupling capacitances between the pixel and the two adjacent data lines respectively on the left and right sides of the pixel, which causes change in voltage values of pixel electrodes of two corresponding pixels, and therefore the luminance of the two corresponding pixels, which results in vertical crosstalk and reducing display quality.
In one aspect, some embodiments of the present disclosure provide a driving method of a display panel. The display panel includes: a first data line, a second data line adjacent to the first data line, and a sub-pixel column disposed between the first data line and the second data line, the sub-pixel column including N sub-pixels. The driving method includes: obtaining first initial voltage values respectively corresponding to the N sub-pixels on the first data line in a first initial picture, second initial voltage values respectively corresponding to the N sub-pixels on the second data line in the first initial picture, third initial voltage values respectively corresponding to 1st to Mth sub-pixels of the N sub-pixels on the first data line in a second initial picture following the first initial picture, and fourth initial voltage values respectively corresponding to the 1st to Mth sub-pixels on the second data line in the second initial picture, wherein M is less than or equal to N, and both M and N are positive integers; calculating a voltage compensation value for the Mth sub-pixel based on the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value corresponding to the Mth sub-pixel; calculating a target voltage value for the Mth sub-pixel based on the voltage compensation value; and displaying the second initial picture based on the target voltage value.
In another aspect, some embodiments of the present disclosure provide a display device including a display panel and a drive circuit electrically connected to the display panel. The display panel includes at least: a first data line, a second data line adjacent to the first data line, and a sub-pixel column disposed between the first data line and the second data line, the sub-pixel column comprising N sub-pixels. The drive circuit includes: an obtaining module configured to obtain first initial voltage values respectively corresponding to the N sub-pixels on the first data line in a first initial picture, second initial voltage values respectively corresponding to the N sub-pixels on the second data line in the first initial picture, third initial voltage values respectively corresponding to 1st to Mth sub-pixels of the N sub-pixels on the first data line in a second initial picture following the first initial picture, and fourth initial voltage values respectively corresponding to the 1st to Mth sub-pixels on the second data line in the second initial picture, wherein M is less than or equal to N, and both M and N are positive integers; a calculation module configured to calculate a voltage compensation value for the Mth sub-pixel based on the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value corresponding to the Mth sub-pixel, and calculate a target voltage value for the Mth sub-pixel based on the voltage compensation value; and a driving module configured to display the second initial picture based on the target voltage value.
In still another aspect, some embodiments of the present disclosure provide a display device including a display panel and a drive circuit electrically connected to the display panel. The display panel includes at least: a first data line, a second data line adjacent to the first data line, and a sub-pixel column disposed between the first data line and the second data line, the sub-pixel column comprising N sub-pixels. The drive circuit includes a chip, and the chip stores a plurality of computer programs executable by the chip to perform a driving method of the display panel. The driving method includes: obtaining first initial voltage values respectively corresponding to the N sub-pixels on the first data line in a first initial picture, second initial voltage values respectively corresponding to the N sub-pixels on the second data line in the first initial picture, third initial voltage values respectively corresponding to 1st to Mth sub-pixels of the N sub-pixels on the first data line in a second initial picture following the first initial picture, and fourth initial voltage values respectively corresponding to the 1st to Mth sub-pixels on the second data line in the second initial picture, wherein M is less than or equal to N, and both M and N are positive integers; calculating a voltage compensation value for the Mth sub-pixel based on the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value corresponding to the Mth sub-pixel; calculating a target voltage value for the Mth sub-pixel based on the voltage compensation value; and displaying the second initial picture based on the target voltage value.
The technical solutions in some embodiments of the present disclosure will be described below with reference to the drawings. The described technical solutions are only used to explain and illustrate the ideas of the present disclosure and should not be regarded as limiting the protection scope of the present disclosure.
The various embodiments provided in the present disclosure are similar, and features in different embodiments can be combined with each other.
As shown in
It should be noted that the first direction X is a direction along which a scan line extends, and the second direction Y is a direction along which a data line extends.
Due to the influence of the second display sub-area 22, the first display sub-area 21 and/or the third display sub-area 23 is/are brighter or darker than the first display area 10 and/or the third display area 30, displaying a picture with a gray background and a color frame, which is specifically, due to unequal voltage values on left and right sides of a pixel. Besides, unequal distances between the pixel and the data lines on its left and right sides result in asymmetric parasitic capacitances between the pixel and the data lines on its left and right sides, thereby causing vertical crosstalk.
As shown in
As shown in
Referring to
In some embodiments, the obtaining module 121 is configured to obtain first initial voltage values corresponding to the N sub-pixels on the first data line in a first initial picture, second initial voltage values corresponding to the N sub-pixels on the second data line in the first initial picture, third initial voltage values corresponding to 1st to Mth sub-pixels on the first data line in a second initial picture following the first initial picture, and fourth initial voltage values corresponding to the 1st to Mth sub-pixels on the second data line in the second initial picture, where M is less than or equal to N, and both M and N are positive integers.
In some embodiments, the calculation module 122 is configured to calculate a voltage compensation value for the Mth sub-pixel based on the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value corresponding to the Mth sub-pixel, and calculate a target voltage value for the Mth sub-pixel based on the voltage compensation value.
In some embodiments, the driving module 123 is configured to display the second initial picture based on the target voltage value.
The display device 100 provided by some embodiments of the present disclosure obtains voltage compensation values corresponding to two adjacent data lines in two consecutively displayed display pictures, adjusts initial voltage values of a pixel column between the two adjacent data lines based on the voltage compensation values to obtain corresponding target voltage values, and displays the second initial picture according to the target voltage values, which may address the vertical crosstalk caused by asymmetric parasitic capacitances between a pixel and the data lines on its left and right sides and improve the display quality.
In some embodiments of the present disclosure, the display panel of the display device 100 may be a liquid crystal display (LCD) panel based on thin film transistor LCD technology, an organic light emitting diode (OLED) display panel based on OLED technology, a quantum-dot light-emitting diode (QD-LED) based on QD-LED technology, etc.
In some embodiments, the drive circuit of the display device 100 may include a chip storing a plurality of computer programs. The computer programs may be executable by the chip to perform a driving method of the display panel, for example, the driving methods of the display panel as described in
As shown in
In operation S10, first initial voltage values corresponding to the N sub-pixels on the first data line in a first initial picture, second initial voltage values corresponding to the N sub-pixels on the second data line in the first initial picture, third initial voltage values corresponding to the 1st to Mth sub-pixels on the first data line in a second initial picture following the first initial picture, and fourth initial voltage values corresponding to the 1st to Mth sub-pixels on the second data line in the second initial picture are obtained, where M is less than or equal to N, and both M and N are positive integers.
As shown in
In sub-operation S101, image data of the first initial picture and the second initial picture that are displayed consecutively are received.
In some embodiments, grayscale values, driving voltage values, chromaticity, or the like of the pixels in the continuously displayed first initial picture and second initial picture are received.
In sub-operation S102, first grayscale values corresponding to the N sub-pixels on the first data line in the first initial picture, second grayscale values corresponding to the N sub-pixels on the second data line in the first initial picture, third grayscale values corresponding to the 1st to Mth sub-pixels on the first data line in the second initial picture, and fourth grayscale values corresponding to the 1st to Mth sub-pixels on the second data line in the second initial picture are obtained.
In some embodiments, the grayscale values corresponding to multiple sub-pixels of the sub-pixel column may be the same or different. If the grayscale values corresponding to the multiple sub-pixels of the sub-pixel column are different, the grayscale values corresponding to the multiple sub-pixels of the sub-pixel column are obtained respectively.
In sub-operation S103, the first initial voltage values corresponding to the first grayscale values, the second initial voltage values corresponding to the second grayscale values, the third initial voltage values corresponding to the third grayscale values, and the fourth initial voltage values corresponding to the fourth grayscale values are obtained based on a preset look up table. The preset look up table includes a correspondence between grayscale values and voltage values.
In some embodiments, the driving method of the display panel further includes establishing the correspondence between the grayscale values and the voltage values. The initial voltage values corresponding to various grayscale values are obtained according to the correspondence between the grayscale values and the voltage values.
In operation S20, a voltage compensation value for the Mth sub-pixel is calculated based on the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value corresponding to the Mth sub-pixel.
In some embodiments, during a display period of the first initial picture, the first data line provides the first initial voltage values to an input terminal of the first data line, and the second data line provides the second initial voltage values to an input terminal of the second data line. During a display period of the second initial picture, the first data line provides the third initial voltage values to the input terminal of the first data line, and the second data line provides the fourth initial voltage values to the input terminal of the second data line.
As shown in
In sub-operation S201, a capacitive coupling value is calculated for the Mth sub-pixel based on the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value corresponding to the Mth sub-pixel.
As shown in
In sub-operation S2011, determination is made for the Mth sub-pixel as to whether a polarity of the first initial voltage value is the same as a polarity of the second initial voltage value and whether a polarity of the third initial voltage value is the same as a polarity of the fourth initial voltage value.
In some embodiments, the polarity of the first initial voltage value and the polarity of the third initial voltage value may be the same or opposite, and the polarity of the second initial voltage value and the polarity of the fourth initial voltage value may be the same or opposite.
In sub-operation S2012, in response to the determination that the polarity of the first initial voltage value is the same as the polarity of the second initial voltage value and the polarity of the third initial voltage value is the same as the polarity of the fourth initial voltage value, a sum of the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value is calculated and determined as the capacitive coupling value for the Mth sub-pixel.
For example, if the polarities of the first initial voltage value and the second initial voltage value are both positive, and the polarities of third initial voltage value and the fourth initial voltage value are both positive or negative, the sum of the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value is calculated to obtain the capacitive coupling value of the Mth sub-pixel.
In some embodiments, the capacitive coupling value G coup is calculated according to Formula 1:
where Gcoup represents the capacitive coupling value, VpreR represents the second initial voltage value of the second data line in the first initial picture, VpreL represents the first initial voltage value of the first data line in the first initial picture, VcurL represents the third initial voltage value of the first data line in the second initial picture, and VcurR represents the fourth initial voltage value of the second data line in the second initial picture.
As shown in
In sub-operation S2111, determination is made for the Mth sub-pixel as to whether a polarity of the first initial voltage value is the same as a polarity of the second initial voltage value, and whether a polarity of the third initial voltage value is the same as a polarity of the fourth initial voltage value.
In some embodiments, the polarities of the first initial voltage value and the third initial voltage value may be the same or opposite, and the polarities of the second initial voltage value and the fourth initial voltage value may be the same or opposite.
In sub-operation S2112, in response to the determination that the polarity of the first initial voltage value is the opposite of the polarity of the second initial voltage value and the polarity of the third initial voltage value is the opposite of the polarity of the fourth initial voltage value, a first voltage difference between the first initial voltage value and the second initial voltage value and a second voltage difference between the third initial voltage value and the fourth initial voltage value are calculated.
For example, if the polarity of the first initial voltage value is negative, the polarity of the second initial voltage value is positive, the polarity of the third initial voltage value is positive, and the polarity of the fourth initial voltage value is negative, the first voltage difference between the first initial voltage value and the second initial voltage value is calculated, and the second voltage difference between the third initial voltage value and the fourth initial voltage value is calculated.
In sub-operation S2113, a sum of the first voltage difference value and the second voltage difference value is calculated and determined as the capacitive coupling value for the Mth sub-pixel.
In some embodiments, the capacitive coupling value Gcoup is calculated according to Formula 2:
where Gcoup represents the capacitive coupling value, VpreR represents the second initial voltage value of the second data line in the first initial picture, VpreL represents the first initial voltage value of the first data line in the first initial picture, VcurL represents the third initial voltage value of the first data line in the second initial picture, and VcurR represents the fourth initial voltage value of the second data line in the second initial picture.
In sub-operation S202, the voltage compensation value is calculated for the Mth the sub-pixel based on the capacitive coupling value.
In some embodiments, the voltage compensation value Reg is calculated according to Formula 3:
where Reg represents the voltage compensation value, Gcoup represents the capacitive coupling value, Gain represents a compensation coefficient, and ImageHeight represents the number of pixel rows.
As shown in
In sub-operation S2021, determination is made as to whether an absolute value of the capacitive coupling value is greater than or equal to a preset threshold value.
In some embodiments, in response to the determination that the absolute value of the capacitive coupling value is less than the preset threshold, no voltage value compensation is performed on the sub-pixel column, so as to reduce the power consumption of the display panel.
In sub-operation S2022, in response to the determination that the absolute value of the capacitive coupling value is greater than or equal to the preset threshold value, the voltage compensation value is calculated for the Mth the sub-pixel based on the capacitive coupling value.
For example, if the absolute value of the capacitive coupling value is greater than or equal to the preset threshold value, a first voltage compensation value of the first data line in the first initial picture, a second voltage compensation value of the second data line in the first initial picture, a third voltage compensation value of the first data line in the second initial picture, and a fourth voltage compensation value of the second data line in the second initial picture are calculated based on the capacitive coupling value.
In some embodiments, if the absolute value of the capacitive coupling value is greater than the preset threshold, it indicates that vertical crosstalk occurs in the initial picture. As mentioned above, the cause of the vertical crosstalk between pixels is that the distances between the pixel and the two adjacent data lines are not equal, which causes different parasitic capacitance between the pixel and the data lines on the left and right sides, resulting in inconsistent influence to the pixel by the voltage values. Due to an uneven distribution of voltage values on two sides of the pixel, the effects of voltage values provided by the two adjacent data lines to the pixel cannot be offset, causing fluctuate in the voltage value of the pixel, which results in the phenomenon that the pixel becomes brighter or darker and a resulted visible color shift. Accordingly, in some embodiments, the first voltage compensation value of the first data line in the first initial picture, the second voltage compensation value of the second data line in the first initial picture, the third voltage compensation value of the first data line in the second initial picture, and the fourth voltage compensation value of the second data line in the second initial picture are calculated.
In operation S30, a target voltage value is calculated for the Mth sub-pixel based on the voltage compensation value.
For example, target voltage values corresponding to the first initial voltage value, the second initial voltage value, the third initial voltage value, and the fourth initial voltage value are determined for the Mth sub-pixel, based on the voltage compensation value.
In some embodiments, the target voltage values of the Mth sub-pixel are calculated according to Formula 4:
where Vout represents the target voltage values, Vin represents the initial voltage values of the Mth sub-pixel, and Reg represents the voltage compensation value.
In operation S40, the second initial picture is displayed based on the target voltage value.
As shown in
In sub-operation S401, the target voltage values of the Mth sub-pixel are obtained.
In sub-operation S402, obtaining for the Mth sub-pixel target grayscale values corresponding to the target voltage values according to the preset look-up table, wherein the preset look-up table includes the correspondence between grayscale values and voltage values.
The display method of the display panel provided by some embodiments of the present disclosure obtains voltage compensation values corresponding to two adjacent data lines in two consecutively displayed display pictures, adjusts initial voltage values of a pixel column between the two adjacent data lines based on the voltage compensation values to obtain corresponding target voltage values, and displays the second initial picture according to the target voltage values, which may address the vertical crosstalk caused by asymmetric parasitic capacitances between a pixel and the data lines on its left and right sides and improve the display quality.
Some embodiments of the present disclosure have been described in detail above. The description of the above embodiments merely aims to help to understand the present disclosure. Many modifications or equivalent substitutions with respect to the embodiments may occur to those of ordinary skill in the art based on the present disclosure. Thus, these modifications or equivalent substitutions shall fall within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202311523967.3 | Nov 2023 | CN | national |