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EP-3895153-B1 - METHOD OF DRIVING PIXEL ARRANGEMENT STRUCTURE HAVING PLURALITY OF SUBPIXELS, DRIVING CHIP FOR DRIVING PIXEL ARRANGEMENT STRUCTURE HAVING PLURALITY OF SUBPIXELS, DISPLAY APPARATUS, AND COMPUTER-PROGRAM PRODUCT

EP3895153B1EP 3895153 B1EP3895153 B1EP 3895153B1EP-3895153-B1

Inventors

  • HUANGFU, LUJIANG
  • LI, Zhenzhen
  • TAN, WENJING

Dates

Publication Date
20260506
Application Date
20190725

Claims (13)

  1. A method of driving a pixel arrangement structure having a plurality of subpixels comprising a plurality of first subpixels (401) of a first color, a plurality of second subpixels (402) of a second color, and a plurality of third subpixels (403) of a third color, wherein the first color, the second color and the third color are different colors; wherein the plurality of first subpixels (401), the plurality of second subpixels (402) and the plurality of third subpixels (403) are respectively arranged in an array of I columns and J rows; and the pixel arrangement structure comprises a plurality of minimum translational repeating units, a respective one of the plurality of minimum translational repeating units comprising one of the plurality of first subpixels (401), one of the plurality of second subpixels (402), and two of the plurality third subpixels (403), wherein the minimum translational repeating units are configured to display a plurality of logic pixels of an image arranged in I columns and J rows; wherein the method comprises: deriving a first actual data signal of a subpixel (411) of the plurality of first subpixels (401) in an i-th column and in a j-th row, based on a theoretical data signal of a first logic subpixel of the first color from a first logic pixel in a (i-1)-th column and in a (j-1)-th row and a theoretical data signal of a first logic subpixel of the first color from a second logic pixel in the (i-1)-th column and the j-th row; deriving a second actual data signal of a subpixel (413b) of the plurality of third subpixels (403) in the i-th column and in the j-th row, based on a theoretical data signal of a third logic subpixel of the third color from a third logic pixel in the i-th column and in the j-th row; deriving a third actual data signal of a subpixel (412) of the plurality of second subpixels (402) in an (i+1)-th column and in the j-th row, based on a theoretical data signal of a second logic subpixel of the second color from a fourth logic pixel in the (i+1)-th column and in the (j-1)-th row and a theoretical data signal of a second logic subpixel of the second color from a fifth logic pixel in the (i+1)-th column and in the j-th row; and deriving a fourth actual data signal of a subpixel (413a) of the plurality of third subpixels (403) in the i-th column and in the (j-1)-th row, based on a theoretical data signal of a third logic subpixel of the third color from a sixth logic pixel in the i-th column and in the (j-1)-th row; wherein 2 ≤ i ≤ I, 2 ≤ j ≤ J, wherein the plurality of third subpixels (403) are grouped into a plurality of virtual pixels arranged along a row direction and a column direction; the plurality of third subpixels (403) are grouped into a plurality of pairs of adjacent third subpixels (403); wherein a respective one of the plurality of virtual pixels comprises: a subpixel selected from the respective one of the plurality of pairs of adjacent third subpixels (403); and a subpixel selected from the respective one of the plurality of first subpixels (401) and the respective one of the second subpixels (402); wherein a first virtual pixel (700) of the plurality of virtual pixels in the i-th column and in the j-th row of an array of the plurality of virtual pixels comprises the subpixel (411) of the plurality of first subpixels (401) in the i-th column and in the j-th row and the subpixel (413b) of the plurality of third subpixels (403) in the i-th column and in the j-th row in a same minimum translational repeating unit; a second virtual pixel (710) of the plurality of virtual pixels in the (i+1)-th column and in the j-th row of the array of the plurality of virtual pixels comprises the subpixel (412) of the plurality of second subpixels (402) in the (i+1)-th column and in the j-th row in the same minimum translational repeating unit; a third virtual pixel (720) of the plurality of virtual pixels in the i-th column and in the (j-1)-th row of the array of the plurality of virtual pixels comprises the subpixel (413a) of the plurality of third subpixels (403) in the i-th column and in the (j-1)-th row in the same minimum translational repeating unit; and the subpixel (413b) of the plurality of third subpixels (403) in the i-th column and in the j-th row and the subpixel (413a) of the plurality of third subpixels (403) in the i-th column and in the (j-1)-th row are grouped into one of the plurality of pairs of adjacent third subpixels (403), wherein the first actual data signal of the subpixel (411) of the plurality of first subpixels (401) in the i-th column and in the j-th row is represented by a following equation: X i , j = α 1 ⋅ x i − 1 , j − 1 γ + α 2 ⋅ x i − 1 , j γ 1 γ ; wherein X i,j represents the first actual data signal of the subpixel (411) of the plurality of first subpixels (401) in the i-th column and in the j-th row; x i -1, j -1 represents the theoretical data signal of the first logic subpixel of the first color from the first logic pixel in the (i-1)-th column and in the (j-1)-th row; x i -1 ,j represents the theoretical data signal of the first logic subpixel of the first color from the second logic pixel in the (i-1)-th column and the j-th row; α 1 represents a weight of the x i -1 ,j -1 ; α 2 represents a weight of the x i -1 ,j ; and γ is a constant; the second actual data signal of the subpixel (413b) of the plurality of third subpixels (403) in the i-th column and in the j-th row is represented by a following equation: G i , j = g i , j ; wherein G i,j represents the second actual data signal of the subpixel (413b) of the plurality of third subpixels (403) in the i-th column and in the j-th row; g i,j represents the theoretical data signal of the third logic subpixel of the third color from the third logic pixel in the i-th column and in the j-th row; the third actual data signal of the subpixel (412) of the plurality of second subpixels (402) in the (i+1)-th column and in the j-th row is represented by a following equation: Y i + 1 , j = β 1 ⋅ y i + 1 , j − 1 γ + β 2 ⋅ y i + 1 , j γ 1 γ ; wherein Y i +1 ,j represents the third actual data signal of the subpixel (412) of the plurality of second subpixels (402) in the (i+1)-th column and in the j-th row; y i +1, j -1 represents the theoretical data signal of the second logic subpixel of the second color from the fourth logic pixel in the (i+1)-th column and in the (j-1)-th row; y i +1 ,j represents the theoretical data signal of the second logic subpixel of the second color from the fifth logic pixel in the (i+1)-th column and in the j-th row; β 1 represents a weight of the y i +1 ,j- 1 ; β 2 represents a weight of the y i +1,j , and γ is a constant; the fourth actual data signal of the subpixel (413a) of the plurality of third subpixels (403) in the i-th column and in the (j-1)-th row is represented by a following equation: G i , j − 1 = g i , j − 1 ; wherein G i,j -1 represents the fourth actual data signal of the subpixel (413a) of the plurality of third subpixels (403) in the i-th column and in the (j-1)-th row; and g i,j- 1 represents the theoretical data signal of the third logic subpixel of the third color from the sixth logic pixel in the i-th column and in the (j-1)-th row.
  2. The method of claim 1, wherein each of the α 1 and the α 2 is 0.5; and each of the β 1 and the β 2 is 0.5.
  3. The method of claim 1 or 2, wherein the third color is green; and the first color and the second color are two different colors selected from red, and blue.
  4. The method of any one of claims 1 to 3, wherein the row direction and column direction are substantially perpendicular to each other.
  5. The method of any one of claims 1 to 4, wherein the respective one of the plurality of first subpixels (401) has a substantial hexagonal shape; the respective one of the plurality of second subpixels (402) has a substantial hexagonal shape; any two sides of the substantial hexagonal shape facing each other are substantially parallel to each other; each of the respective one of a plurality of pairs of adjacent third subpixels (403) has a substantial pentagonal shape; the substantial pentagonal shape has two substantially parallel sides, and a base side substantially perpendicular to the two substantially parallel sides and connecting the substantially parallel sides; a base side of the first one of the respective one of the plurality of pairs of adjacent third subpixels (403) is in direct adjacent to a base side of the second one of the respective one of a plurality of pairs of adjacent third subpixels (403); and a pair of sides having a longest length among six sides of the respective one of the plurality of first subpixels (401), a pair of sides having a longest length among six sides of the respective one of the plurality of second subpixels (402), and the two substantially parallel sides of the each of the respective one of a plurality of pairs of adjacent third subpixels (403) are substantially parallel.
  6. The method of any one of claims 1 to 5, wherein one of the plurality of first subpixels (401) and one of the plurality of second subpixels (402) in the respective one of the plurality of minimum translational repeating units are aligned along the row direction; and a respective one pair of the plurality of pairs of adjacent third subpixels (403) in the respective one of the plurality of minimum translational repeating units are aligned along the column direction.
  7. The method of any one of claims 1 to 6, wherein in the respective one of the plurality of minimum translational repeating units, orthographic projections of a respective one pair of the plurality of pairs of adjacent third subpixels (403) on a plane perpendicular to the column direction are between an orthographic projection of a respective one of the plurality of first subpixels (401) on the plane perpendicular to the column direction and an orthographic projection of a respective one of the plurality of second subpixels (402) on the plane perpendicular to the column direction.
  8. The method of any one of claims 1 to 7, wherein the pixel arrangement structure comprises a plurality of repeating rows; a respective one of the plurality of repeating rows comprises a selected number of minimum translational repeating units arranged along a row direction; the plurality of repeating rows are arranged along a column direction; and the row direction and the column direction are not parallel to each other.
  9. A driving chip for driving a pixel arrangement structure having a plurality of subpixels; wherein the plurality of subpixels comprises a plurality of first subpixels (401) of a first color, a plurality of second subpixels (402) of a second color, and a plurality of third subpixels (403) of a third color; the plurality of third subpixels (403) are arranged in an array of I columns and J rows; and the pixel arrangement structure comprises a plurality of minimum translational repeating units, a respective one of the plurality of minimum translational repeating units comprising one of the plurality of first subpixels (401), one of the plurality of second subpixels (402), and two of the plurality third subpixels (403); wherein the driving chip is adapted to perform steps of the method according to any one of claims 1 to 8.
  10. A display apparatus, comprising: the driving chip of claim 9; one or more integrated circuits connected to the driving chip; and the pixel arrangement structure having the plurality of subpixels.
  11. A computer-program product comprising computer-readable instructions, which when being executed by a processor, causes the processor to perform steps according to any one of claims 1 to 8.
  12. A method of driving a pixel arrangement structure having a plurality of subpixels comprising a plurality of first subpixels (401) of a first color, a plurality of second subpixels (402) of a second color, and a plurality of third subpixels (403) of a third color, wherein the first color, the second color and the third color are different colors; wherein the plurality of first subpixels (401), the plurality of second subpixels (402) and the plurality of third subpixels (403) are respectively arranged in an array of I columns and J rows; and the pixel arrangement structure comprises a plurality of minimum translational repeating units, a respective one of the plurality of minimum translational repeating units comprising one of the plurality of first subpixels (401), one of the plurality of second subpixels (402), and two of the plurality third subpixels (403), wherein the minimum translational repeating units are configured to display a plurality of logic pixels of an image arranged in I columns and J rows; wherein the method comprises: deriving a first actual data signal of a subpixel (461) of the plurality of first subpixels (401) in an i-th column and in a j-th row, based on a theoretical data signal of a first logic subpixel of the first color from a first logic pixel in a (i-1)-th column and in a (j-1)-th row and a theoretical data signal of a first logic subpixel of the first color from a second logic pixel in the i-th column and the (j-1)-th row; deriving a second actual data signal of a subpixel (463a) of the plurality of third subpixels (403) in the i-th column and in the j-th row, based on a theoretical data signal of a third logic subpixel of the third color from a third logic pixel in the i-th column and in the j-th row; deriving a third actual data signal of a subpixel (462) of the plurality of second subpixels (402) in the i-th column and in a (j+1)-th row, based on a theoretical data signal of a second logic subpixel of the second color from a fourth logic pixel in the (i-1)-th column and in the (j+1)-th row and a theoretical data signal of a second logic subpixel of the second color from a fifth logic pixel in the i-th column and in the (j+1)-th row; and deriving a fourth actual data signal of a subpixel (463b) of the plurality of third subpixels (403) in the (i-1)-th column and in the j-th row, based on a theoretical data signal of a third logic subpixel of the third color from a sixth logic pixel in the (i-1)-th column and in the j-th row; wherein 2 ≤ i ≤ I , 2 ≤ j ≤ J , wherein the plurality of third subpixels (403) are grouped into a plurality of virtual pixels arranged along a row direction and a column direction; the plurality of third subpixels (403) are grouped into a plurality of pairs of adjacent third subpixels (403); wherein a respective one of the plurality of virtual pixels comprises: a subpixel selected from the respective one of the plurality of pairs of adjacent third subpixels (403); and a subpixel selected from the respective one of the plurality of first subpixels (401) and the respective one of the second subpixels (402); wherein a first virtual pixel of the plurality of virtual pixels in the i-th column and in the j-th row of an array of the plurality of virtual pixels comprises the subpixel (461) of the plurality of first subpixels (401) in the i-th column and in the j-th row and the subpixel (463a) of the plurality of third subpixels (403) in the i-th column and in the j-th row in a same minimum translational repeating unit; a second virtual pixel of the plurality of virtual pixels in the i-th column and in the (j+1) row of the array of the plurality of virtual pixels comprises the subpixel (462) of the plurality of second subpixels (402) in the i-th column and in the (j+1)-th row in the same minimum translational repeating unit; a third virtual pixel of the plurality of virtual pixels in the (i-1)-th column and in the j-th row of the array of the plurality of virtual pixels comprises the subpixel (463b) of the plurality of third subpixels (403) in the (i-1)-th column and in the j-th row in the same minimum translational repeating unit; and the subpixel (463a) of the plurality of third subpixels (403) in the i-th column and in the j-th row and the subpixel (463b) of the plurality of third subpixels (403) in the (i-1)-th column and in the j-th row are grouped into one of the plurality of pairs of adjacent third subpixels (403), wherein the first actual data signal of the subpixel (461) of the plurality of first subpixels (401) in the i-th column and in the j-th row is represented by a following equation: X i , j = α 1 ⋅ x i − 1 , j − 1 γ + α 2 ⋅ x i , j − 1 γ 1 γ ; wherein X i,j represents the first actual data signal of the subpixel (461) of the plurality of first subpixels (401) in an i-th column and in a j-th row; x i -1, j -1 represents the theoretical data signal of the first logic subpixel of the first color from the first logic pixel in the (i-1)-th column and in the (j-1)-th row; x i,j -1 represents the theoretical data signal of the first logic subpixel of the first color from the second logic pixel in the i-th column and the (j-1)-th row; α 1 represents a weight of the x i -1 ,j -1 ; α 2 represents a weight of the x i,j -1 ; and γ is a constant; the second actual data signal of the subpixel (463a) of the plurality of third subpixels (403) in the i-th column and in the j-th row is represented by a following equation: G i , j = g i , j ; wherein G i,j represents the second actual data signal of the subpixel (463a) of the plurality of third subpixels in the i-th column and in the j-th row; g i,j represents the theoretical data signal of the third logic subpixel of the third color from the third logic pixel in the i-th column and in the j-th row; the third actual data signal of the subpixel (462) of the plurality of second subpixels (402) in the i-th column and in the (j+1)-th row is represented by a following equation: Y i , j + 1 = β 1 ⋅ y i − 1 , j + 1 γ + β 2 ⋅ y i , j + 1 γ 1 γ ; wherein Y i,j+ 1 represents third actual data signal of the subpixel (462) of the plurality of second subpixels (402) in the i-th column and in the (j+1)-th row; y i -1, j +1 represents the theoretical data signal of the second logic subpixel of the second color from the fourth logic pixel in the (i-1)-th column and in the (j+1)-th row; y i,j +1 represents the theoretical data signal of the second logic subpixel of the second color from the fifth logic pixel in the i-th column and in the (j+1)-th row; β 1 represents a weight of the y i- 1 ,j +1 ; β 2 represents a weight of the y i , j +1 , and γ is a constant; the fourth actual data signal of the subpixel (463b) of the plurality of third subpixels (403) in the (i-1)-th column and in the j-th row is represented by a following equation: G i − 1 , j = g i − 1 , j ; wherein G i -1 ,j represents the fourth actual data signal of the subpixel (463b) of the plurality of third subpixels (403) in the (i-1)-th column and in the j-th row; and g i -1 ,j represents theoretical data signal of the third logic subpixel of the third color from the sixth logic pixel in the (i-1)-th column and in the j-th row.
  13. A computer-program product comprising computer-readable instructions, which when being executed by a processor, causes the processor to perform steps according to claim 12.

Description

TECHNICAL FIELD The present invention relates to display technology, more particularly, to a method of driving a pixel arrangement structure having a plurality of subpixels, a driving chip for driving a pixel arrangement structure having a plurality of subpixels, a display apparatus, and a computer-program product. BACKGROUND Nowadays, display devices are required to have higher and higher resolutions. A display device having a high resolution can perform a high quality display. Usually, decreasing the size of each subpixel and distances between any two adjacent subpixels can increase the resolution of a display device. To decrease the size of each subpixel and distances between any two adjacent subpixels, the accuracy of fabricating the display device should be higher, resulting in increasing difficulties in fabricating the display device, and increasing cost of fabricating the display device. Sup-Pixel Rendering takes advantage of the fact that human eyes have different sensitivities with respect to different colors. By changing a pixel arrangement that a pixel has a red subpixel, a green subpixel, and a blue subpixel into an pixel arrangement that two or more pixels share a subpixel having a selected color with respect to which the human eye has a relatively low sensitivity, a total number of subpixels can be decreased, but the display performance by the latter pixel arrangement can keep the same as the display performance by the former pixel arrangement. Reducing the total number of subpixels can reduce the difficulties to fabricate a display panel, and decreasing the cost of fabricating the display panel. EP2423911A2 describes a multi-primary liquid crystal display (LCD) device comprising pixels with more than three primary colors, specifically disclosing a five-primary system including Red, Green, Blue, Yellow, and Cyan sub-pixels. The invention aims to improve color gamut and brightness. The document discloses various spatial arrangements of these five sub-pixels, such as stripe or mosaic configurations. The document discusses a sub-pixel rendering technique where the data for a specific sub-pixel (e.g., Cyan) may be derived from a combination of data from two or more logical pixels to allow for a lower spatial resolution of that specific color component compared to others. US2016/019825A1 discloses a pixel array and a driving method for a display panel, typically utilizing a standard RGB sub-pixel arrangement. The objective is to reduce the granular sensation of the display and improve the display effect. The method involves combining adjacent sub-pixels into pixel blocks and calculating the actual brightness of a target sub-pixel based on its theoretical brightness and the theoretical brightness of one or more neighbouring sub-pixels of the same color located in the same row. By sharing brightness information horizontally between adjacent pixels of the same color, the method smooths transitions and reduces visual granularity. The document teaches calculating actual data values using a weighted sum of theoretical values from the current and adjacent columns within a single row. SUMMARY The invention is as defined in the appended claims. BRIEF DESCRIPTION OF THE FIGURES The following drawings are merely examples for illustrative purposes according to various disclosed embodiments and are not intended to limit the scope of the present invention. FIG. 1 is a schematic diagram illustrating an algorithm of Sup-Pixel Rendering used in driving a plurality of subpixels in a pixel arrangement structure in some embodiments according to the present disclosure.FIG. 2A is a schematic diagram illustrating that a pixel arrangement structure is displaying a horizontal line having a substantially white color in some embodiments according to the present disclosure.FIG. 2B is a schematic diagram illustrating that a pixel arrangement structure is displaying a vertical line having a substantially white color in some embodiments according to the present disclosure.FIG. 3A is a schematic diagram of a partial structure of a pixel arrangement structure in some embodiments according to the present disclosure.FIG. 3B is a schematic diagram of a structure of a respective one of a plurality of minimum translational repeating units in some embodiments according to the present disclosure.FIG. 3C is a schematic diagram of a structure of a respective one of a plurality of minimum translational repeating units in some embodiments according to the present disclosure.FIG. 3D is a schematic diagram illustrating a relationship between a row direction X and a column direction Y in some embodiments according to the present disclosure.FIG. 4 is a flow chart of a method of driving a pixel arrangement structure in some embodiments according to the present disclosure.FIG. 5A is a schematic diagram of a partial structure of an array of the plurality of virtual pixels of a pixel arrangement structure in some embodiments according to the present