CN109727573B - Display method and display device - Google Patents
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Abstract
The invention discloses a display method and a display device, wherein the display method aims at any pixel in a display panel and comprises the following steps: acquiring an input gray scale of a pixel; judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used for converting the color gamut of the display subarea into a uniform color gamut of the display panel; the unified color gamut of the display panel is the intersection of the actual color gamuts of the display partitions of the display panel; acquiring an output gray scale of the pixel according to the conversion matrix and the input gray scale; and controlling the pixel to emit light according to the output gray scale. The display subarea converts the color gamut into the uniform color gamut through the conversion matrix, so that all the display subareas on the display panel have the same uniform color gamut, the color uniformity of the display panel is improved, and in addition, the color display of the full display panel is more accurate directly because all the display subareas have the same uniform color gamut, and therefore the display quality of the picture can be ensured when the complex picture is displayed.
Description
Technical Field
The present invention relates to the field of display panel technologies, and in particular, to a display method and a display device.
Background
Color uniformity is one of the important criteria for measuring the quality of a display panel. Taking an Active-matrix organic light emitting diode (AMOLED) display panel as an example, the AMOLED display panel is a display panel that utilizes an OLED device deposited on a TFT substrate circuit to achieve self-luminescence and image display, and has many advantages of low power consumption, high contrast, wide color gamut, wide viewing angle, wide working temperature range, fast response time, and being capable of being made into a foldable and rollable flexible form. However, due to the limitation of the process, the actually produced AMOLED display panel often cannot ensure that the device performance of the R/G/B sub-pixels (sub-pixels) in each pixel (pixel) is completely the same, and when the performance difference reaches a certain degree, the uniformity of the R/G/B monochromatic color is poor, and the color gamut of different pixels is inconsistent, thereby affecting the normal display of the picture.
In order to improve the color uniformity of the display panel, the conventional compensation method usually only compensates for a single white picture, so that the compensation method cannot ensure the display quality of a complex picture.
Disclosure of Invention
The invention provides a display method and a display device, which are used for improving the display quality of a complex picture.
An embodiment of the present invention provides a display method, which includes, for any pixel in a display panel:
acquiring an input gray scale of the pixel;
judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used for converting the color gamut of the display subarea into a uniform color gamut of the display panel; the unified color gamut of the display panel is the intersection of the actual color gamuts of the display partitions of the display panel;
acquiring an output gray scale of the pixel according to the conversion matrix and the input gray scale;
and controlling the pixel to emit light according to the output gray scale.
Optionally, the transformation matrix is obtained by:
acquiring color coordinates of each pixel in the display panel under preset brightness;
dividing the display panel into a plurality of display subareas according to the difference of the color coordinates of the pixels;
determining the intersection of the color gamuts of the plurality of display partitions as a unified color gamut of the display panel;
and performing color matching calculation on each display partition to obtain a conversion matrix of the color gamut of the display partition when the color gamut reaches the unified color gamut.
Optionally, the pixel comprises at least three sub-pixels;
acquiring color coordinates of each pixel in the display panel under preset brightness, wherein the acquiring comprises the following steps:
for the sub-pixels with the same color in each pixel, acquiring the color coordinates of the sub-pixels with the same color when the sub-pixels are subjected to pure color display according to the preset brightness;
dividing the display panel into a plurality of display partitions according to the difference of the color coordinates of the pixels, including:
determining each display partition corresponding to each color according to the difference of the color coordinates of each sub-pixel of each color;
and determining each display partition of the display panel from each display partition corresponding to each color.
Optionally, determining each display partition corresponding to each color according to a difference of color coordinates of each sub-pixel of each color includes:
aiming at any sub-pixel with the same color, judging a color difference corresponding to the color coordinate of the sub-pixel;
and dividing the continuous sub-pixels of which the color difference is not greater than a preset threshold into the same display subarea.
Optionally, determining each display partition of the display panel from each display partition corresponding to each color includes:
respectively determining the number of display subareas corresponding to each color;
and determining the display subarea corresponding to the color with the largest number of display subareas as the display subarea of the display panel.
Optionally, the preset threshold is 1 jncd.
Optionally, performing color matching calculation on each display partition to obtain a conversion matrix of the color gamut of the display partition when the color gamut reaches the uniform color gamut, including:
aiming at any display subarea, acquiring an edge color coordinate in the color domain of the display subarea;
acquiring edge color coordinates in the uniform color gamut;
and performing color matching calculation on the edge color coordinates in the display subarea color gamut according to the edge color coordinates in the uniform color gamut to obtain the conversion matrix.
Optionally, the preset brightness is 255 gray-scale brightness.
An embodiment of the present invention provides a display device, including: a display panel and a driving circuit;
the drive circuit is configured to:
aiming at any pixel in the display panel, acquiring an input gray scale of the pixel;
judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used for converting the color gamut of the display subarea into a uniform color gamut of the display panel; the unified color gamut of the display panel is the intersection of the actual color gamuts of the display partitions of the display panel;
acquiring an output gray scale of the pixel according to the conversion matrix and the input gray scale;
and controlling the pixel to emit light according to the output gray scale.
Optionally, the transformation matrix is obtained by:
acquiring color coordinates of each pixel in the display panel under preset brightness;
dividing the display panel into a plurality of display subareas according to the difference of the color coordinates of the pixels;
determining the intersection of the color gamuts of the plurality of display partitions as a unified color gamut of the display panel;
and performing color matching calculation on each display partition to obtain a conversion matrix of the color gamut of the display partition when the color gamut reaches the unified color gamut.
In summary, an embodiment of the present invention provides a display method and a display apparatus, where the display method includes, for any pixel in a display panel: acquiring an input gray scale of a pixel; judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used for converting the color gamut of the display subarea into a uniform color gamut of the display panel; the unified color gamut of the display panel is the intersection of the actual color gamuts of the display partitions of the display panel; acquiring an output gray scale of the pixel according to the conversion matrix and the input gray scale; and controlling the pixel to emit light according to the output gray scale. Display panel includes a plurality of display subareas, and the display subareas convert the colour gamut into the unanimous unified colour gamut through the conversion matrix to make all display subareas on the display panel have the same unified colour gamut, thereby display panel's colour homogeneity has been promoted, moreover, directly because all display subareas have the same unified colour gamut, make full display panel's color display more accurate, consequently when showing complicated picture, also can guarantee the display quality of picture.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a display method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a transformation matrix obtaining method according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a partition result according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an intersection of actual color gamuts of display partitions according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a display method according to an embodiment of the present invention, as shown in fig. 1, including the following steps for any pixel in a display panel:
s101: the input gray scale of the pixel is obtained.
S102: judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used for converting the color gamut of the display subarea into a uniform color gamut of the display panel; the unified color gamut of the display panel is the intersection of the actual color gamuts of the display partitions of the display panel.
S103: and acquiring the output gray scale of the pixel according to the conversion matrix and the input gray scale.
S104: and controlling the pixel to emit light according to the output gray scale.
In S101, the input gray levels of the pixels are generated for each pixel in the display panel according to the intended display image, and the generation method can refer to the prior art.
In S102, the display panel disclosed in the embodiment of the present invention has a plurality of display sections, and each display section includes at least one pixel. Each display partition has a conversion matrix corresponding thereto by which the actual color gamut of the display partition can be converted into the unified color gamut of the display panel. Specifically, each display partition has its own actual color gamut, and the unified color gamut may be the intersection of all color gamuts of all display partitions in the display panel, i.e., the maximum color gamut that can be achieved by all display partitions. It should be understood that in an actual application environment, a uniform color gamut may also appear as a partial color gamut in the intersection of the actual color gamuts of all display partitions, and such an implementation should also be included in the embodiments of the present invention.
In S103, the common pixel is mostly composed of Red-Green-Blue (RGB) sub-pixels, and therefore the input gray scale should be in the form of (r, g, b), where r is the input gray scale corresponding to the Red sub-pixel, g is the input gray scale corresponding to the Green sub-pixel, and b is the input gray scale corresponding to the Blue sub-pixel. In this case, the conversion matrix should be a 3 × 3 matrix, and T represents the conversion matrix, then the obtained output gray scale of the pixel is shown as formula one:
wherein r ' is the output gray scale corresponding to the red sub-pixel, g ' is the output gray scale corresponding to the green sub-pixel, and b ' is the output gray scale corresponding to the blue sub-pixel.
In S104, the pixel is controlled to emit light according to the converted output gray scale, and the three-color sub-pixels in S103 are taken as an example. Namely, the red sub-pixel, the green sub-pixel and the blue sub-pixel are controlled to emit light according to r ', g ' and b ', respectively.
Display panel includes a plurality of display subareas, and the display subareas convert the colour gamut into the unanimous unified colour gamut through the conversion matrix to make all display subareas on the display panel have the same unified colour gamut, thereby display panel's colour homogeneity has been promoted, moreover, directly because all display subareas have the same unified colour gamut, make full display panel's color display more accurate, consequently when showing complicated picture, also can guarantee the display quality of picture.
In the embodiment of the invention, the invention also provides a method for obtaining the conversion matrix. Fig. 2 is a schematic flow chart of a method for obtaining a transformation matrix according to an embodiment of the present invention, as shown in fig. 2, including the following steps:
s201: and acquiring the color coordinates of each pixel in the display panel under the preset brightness.
S202: the display panel is divided into a plurality of display sections according to the difference of the color coordinates of the respective pixels.
S203: and determining the intersection of the color gamuts of the plurality of display partitions as the uniform color gamut of the display panel.
S204: and performing color matching calculation on each display partition to obtain a conversion matrix when the color gamut of the display partition reaches the uniform color gamut.
In S201, optionally, the preset brightness is 255 gray-scale brightness, and under the 255 gray-scale brightness, the brightness of each pixel is the highest, and the color coordinate difference is the most obvious. Optionally, for a pixel composed of three-color sub-pixels, for the sub-pixels with the same color in each pixel, the color coordinates of each sub-pixel with the same color when performing pure color display according to the preset brightness may be obtained. Specifically, the red sub-pixels of all the pixels in the display panel may be controlled to emit light, and the green and blue sub-pixels may not emit light, and a red image may be captured by an imaging Device, such as a Charge-coupled Device (CCD) sensor, so as to obtain color coordinates of all the red sub-pixels at a preset brightness. Based on the same operation, the color coordinates of all the blue and green sub-pixels in the display panel at the preset luminance are continuously obtained.
In S202, the display panel is divided into a plurality of regions according to the color coordinates obtained in S201. In the display panel composed of three-color sub-pixels, three pure-color pictures of red, green and blue are obtained in S201. Optionally, in S202, determining each display partition corresponding to each color according to a difference in color coordinates of each sub-pixel of each color; each display section of the display panel is determined from each display section corresponding to each color. Specifically, for any sub-pixel with the same color, the color difference corresponding to the color coordinate of the sub-pixel is judged; and dividing continuous sub-pixels with the color difference not greater than a preset threshold into the same display subarea. The color difference can be obtained by directly calculating the color coordinates of the sub-pixels. Optionally, in the embodiment of the present invention, the preset threshold is 1jncd (just non-specific color difference). This is because 1jncd is the limit of the color difference observable by the human eye, and a color difference lower than 1jncd is not observable by the human eye, and therefore does not affect the user experience. It is easy to understand that the smaller the preset threshold, the larger the number of display partitions of the display panel, the larger the calculation amount of the conversion matrix, so that 1jncd is only a better value of the preset threshold provided by the embodiment of the present invention, and in the actual use process, the value of the preset threshold may also be flexibly adjusted according to the actual requirement on color uniformity.
After the display panel corresponding to each color is divided into the display subareas, optionally, the number of the display subareas corresponding to each color is respectively determined; and determining the display subarea corresponding to the color with the largest number of display subareas as the display subarea of the display panel. For example, the display panel is divided into 3 display partitions when displaying red sub-pixels, 5 display partitions when displaying green sub-pixels, and 6 display partitions when displaying blue sub-pixels, and the final display partition dividing manner of the display panel is based on the dividing manner of the display partitions when displaying blue sub-pixels. The more colors that are displayed in the display section, the worse the color uniformity of the display panel when displaying the colors, and the more compensation is needed. In practical implementation, most of the display panels are poor in color uniformity due to the manufacturing process of the display panel, so that when the display panel displays a red, green and blue pure color image, the color coordinates of the three-color sub-pixels change according to a similar rule, and therefore the division of the display partitions is similar, so that the division of the display partitions of the display panel by the display partition dividing method corresponding to one color can reflect the color coordinate change of the other color to some extent.
In S203, the actual color gamut formed by the three-color sub-pixels is a triangular color gamut, and the three vertexes of the three-color sub-pixels are the color coordinates of the three-color sub-pixels, so that the actual color gamut of the display partition can be obtained by the color coordinates of the three-color sub-pixels in the display partition, and the intersection of the actual color gamuts of the plurality of display partitions is obtained as the unified color gamut of the display panel. It should be noted that the uniform color gamut is also triangular, and three vertices of the uniform color gamut respectively correspond to the color coordinates of the three color sub-pixels in the uniform color gamut.
Fig. 3 is a schematic diagram of a display partitioning result according to an embodiment of the present invention, where a panel 1 is a display panel for displaying red sub-pixels, a panel 2 is a display panel for displaying green sub-pixels, and a panel 3 is a display panel for displaying blue sub-pixels, and the display panel is partitioned into 4 display partitions according to the display partitioning method: partition 1, partition 2, partition 3, and partition 4. Corresponding to fig. 3, fig. 4 is a schematic diagram of an intersection of actual color gamuts of display partitions according to an embodiment of the present invention, where x is an x value in a color coordinate, and y is a y value in the color coordinate, as shown in fig. 4, 4 display partitions have different actual color gamuts, each color gamut is a triangle, and a uniform color gamut obtained by intersecting the 4 color gamuts is exactly the color gamut corresponding to the partition 4.
In S204, optionally, for a display panel composed of three-color sub-pixels, edge color coordinates in the color gamut of a display partition are obtained for any display partition; acquiring edge color coordinates in a uniform color gamut; and performing color matching calculation on the edge color coordinates in the display subarea color domain according to the edge color coordinates in the uniform color domain to obtain a conversion matrix. Continuing with fig. 4 as an example, when obtaining the transformation matrix of partition 1, it is necessary to first obtain the edge color coordinates in the color gamut of partition 1, such as vertex b, obtain the edge color coordinates of the uniform color gamut, such as vertex a, and then transform the color coordinates of vertex b into the color coordinates of vertex a through color matching calculation, so as to obtain the transformation matrix of partition 1. Assuming that the color gamut of the display partition is (xr, yr), (xg, yg), (xb, yb), where (xr, yr) is the coordinates of the red edge color in the color gamut of the display partition, (xg, yg) is the coordinates of the green edge color in the color gamut of the display partition, and (xb, yb) is the coordinates of the blue edge color in the color gamut of the display partition, and the unified color gamuts are (xr1, yr1), (xg1, yg1), (xb1, yb1), a conversion matrix in the form of 3 × 3 can be obtained by color matching calculation.
In summary, an embodiment of the present invention provides a display method for any pixel in a display panel, including: acquiring an input gray scale of a pixel; judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used for converting the color gamut of the display subarea into a uniform color gamut of the display panel; the unified color gamut of the display panel is the intersection of the actual color gamuts of the display partitions of the display panel; acquiring an output gray scale of the pixel according to the conversion matrix and the input gray scale; and controlling the pixel to emit light according to the output gray scale. Display panel includes a plurality of display subareas, and the display subareas convert the colour gamut into the unanimous unified colour gamut through the conversion matrix to make all display subareas on the display panel have the same unified colour gamut, thereby display panel's colour homogeneity has been promoted, moreover, directly because all display subareas have the same unified colour gamut, make full display panel's color display more accurate, consequently when showing complicated picture, also can guarantee the display quality of picture.
Based on the same technical concept, the embodiment of the invention also provides a display device, which can be a terminal or a terminal device with a display function, such as a television display screen, a computer display screen, a mobile phone and the like. Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 5, the display device 500 includes a display panel 501 and a driving circuit 502, where:
a driver circuit 502 for:
acquiring an input gray scale of a pixel for any pixel in the display panel 501;
judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used to convert the color gamut of the display partition into the uniform color gamut of the display panel 501; the unified color gamut of the display panel 501 is an intersection of actual color gamuts of the display partitions of the display panel 501;
acquiring an output gray scale of the pixel according to the conversion matrix and the input gray scale;
and controlling the pixel to emit light according to the output gray scale.
Optionally, the transformation matrix is obtained by:
acquiring color coordinates of each pixel in the display panel 501 at a preset brightness;
the display panel 501 is divided into a plurality of display sections according to the difference in color coordinates of the respective pixels;
determining the intersection of the color gamuts of the plurality of display partitions as the unified color gamut of the display panel 501;
and performing color matching calculation on each display partition to obtain a conversion matrix when the color gamut of the display partition reaches the uniform color gamut.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A display method is characterized by comprising the following steps of aiming at any pixel in a display panel:
acquiring an input gray scale of the pixel;
judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used for converting the color gamut of the display subarea into a uniform color gamut of the display panel; the unified color gamut of the display panel is the intersection of the actual color gamuts of the display partitions of the display panel;
acquiring an output gray scale of the pixel according to the conversion matrix and the input gray scale;
controlling the pixel to emit light according to the output gray scale;
the conversion matrix is obtained by the following method:
acquiring color coordinates of each pixel in the display panel under preset brightness;
dividing the display panel into a plurality of display subareas according to the difference of the color coordinates of the pixels;
determining the intersection of the color gamuts of the plurality of display partitions as a unified color gamut of the display panel;
and performing color matching calculation on each display partition to obtain a conversion matrix of the color gamut of the display partition when the color gamut reaches the unified color gamut.
2. The method of claim 1, wherein the pixel comprises at least three sub-pixels;
acquiring color coordinates of each pixel in the display panel under preset brightness, wherein the acquiring comprises the following steps:
for the sub-pixels with the same color in each pixel, acquiring the color coordinates of the sub-pixels with the same color when the sub-pixels are subjected to pure color display according to the preset brightness;
dividing the display panel into a plurality of display partitions according to the difference of the color coordinates of the pixels, including:
determining each display partition corresponding to each color according to the difference of the color coordinates of each sub-pixel of each color;
and determining each display partition of the display panel from each display partition corresponding to each color.
3. The method of claim 2, wherein determining the display sections corresponding to each color based on differences in color coordinates of the sub-pixels of each color comprises:
aiming at any sub-pixel with the same color, judging a color difference corresponding to the color coordinate of the sub-pixel;
and dividing the continuous sub-pixels of which the color difference is not greater than a preset threshold into the same display subarea.
4. The method of claim 2, wherein determining the display sections of the display panel from the display sections corresponding to the colors comprises:
respectively determining the number of display subareas corresponding to each color;
and determining the display subarea corresponding to the color with the largest number of display subareas as the display subarea of the display panel.
5. The method of claim 3, wherein the predetermined threshold is 1 jncd.
6. The method of claim 2, wherein performing a color matching calculation for each display partition to obtain a conversion matrix for the color gamut of the display partition when the uniform color gamut is reached comprises:
aiming at any display subarea, acquiring an edge color coordinate in the color domain of the display subarea;
acquiring edge color coordinates in the uniform color gamut;
and performing color matching calculation on the edge color coordinates in the display subarea color gamut according to the edge color coordinates in the uniform color gamut to obtain the conversion matrix.
7. The method of claim 1, wherein the predetermined brightness is 255 gray-scale brightness.
8. A display device, comprising: a display panel and a driving circuit;
the drive circuit is configured to:
aiming at any pixel in the display panel, acquiring an input gray scale of the pixel;
judging a display partition where the pixel is located, and calling a conversion matrix corresponding to the display partition; the conversion matrix is used for converting the color gamut of the display subarea into a uniform color gamut of the display panel; the unified color gamut of the display panel is the intersection of the actual color gamuts of the display partitions of the display panel;
acquiring an output gray scale of the pixel according to the conversion matrix and the input gray scale;
controlling the pixel to emit light according to the output gray scale;
the conversion matrix is obtained by the following method:
acquiring color coordinates of each pixel in the display panel under preset brightness;
dividing the display panel into a plurality of display subareas according to the difference of the color coordinates of the pixels;
determining the intersection of the color gamuts of the plurality of display partitions as a unified color gamut of the display panel;
and performing color matching calculation on each display partition to obtain a conversion matrix of the color gamut of the display partition when the color gamut reaches the unified color gamut.
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