Display panel, driving method thereof and display equipment

Abstract

The invention relates to a display panel, a driving method thereof and display equipment, and relates to the technical field of display. The display panel comprises a pixel unit, the pixel unit comprises a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are sequentially configured to emit first green light, second green light, blue light and red light, and the first green light is different from the second green light. The driving method of the display panel comprises the following steps: obtaining a to-be-displayed color of a pixel unit; determining target brightness and target chromaticity coordinates of the pixel units according to the colors; determining a target area to which the target chromaticity coordinate belongs in the chromaticity diagram according to the chromaticity coordinate of each sub-pixel; and under the condition that the target area is the first area or the second area, driving three sub-pixels corresponding to the target area in the pixel unit to emit light according to the target brightness and the target chromaticity coordinates. The color gamut range of the color display panel can be expanded, and ultra-high-definition display is achieved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, a driving method thereof, and a display device. Background Art

[0002] With the continuous advancement of ultra-high-definition display technology, the ITU-R BT.2020 (BT.2020), a next-generation international display standard for high resolution and wide color gamut, has been widely adopted in televisions, monitors, and other image display devices. This standard not only specifies higher spatial resolution and dynamic range, but also defines a wider color gamut, significantly surpassing previously widely used color space standards such as BT.709, sRGB, and DCI-P3.

[0003] In terms of display devices, LED displays, due to their use of light-emitting diode (LED) wafer-based direct display technology, offer inherent advantages in brightness, contrast, and color expression. In particular, in terms of color reproduction, LED displays can achieve a wider color gamut coverage, thus more closely approaching the ideal color gamut range specified by the BT.2020 standard.

[0004] At present, the BT.2020 color gamut coverage of existing LED display screens can only reach about 80%. There are still certain limitations in color gamut utilization and color accuracy, and it is difficult to fully realize the higher requirements of the BT.2020 standard for the color performance of the display system. Summary of the Invention

[0005] Based on this, it is necessary to provide a display panel and a driving method and a display device that can achieve high color gamut coverage.

[0006] An embodiment of the present application provides a method for driving a display panel, wherein the display panel includes a pixel unit, the pixel unit includes a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are sequentially configured to emit a first green light, a second green light, a blue light, and a red light, wherein the first green light is different from the second green light; the method includes:

[0007] Obtaining the color to be displayed by the pixel unit;

[0008] determining a target brightness and a target chromaticity coordinate of the pixel unit according to the color;

[0009] Determining, based on the chromaticity coordinates of each sub-pixel, a target region to which the target chromaticity coordinates belong in a chromaticity diagram; wherein the chromaticity diagram includes at least a first region and a second region, the first region and the second region being two triangular regions formed by any diagonal line within a quadrilateral region formed by the chromaticity coordinates of each sub-pixel;

[0010] In a case where the target area is the first area or the second area, three sub-pixels corresponding to the target area in the pixel unit are driven to emit light according to the target brightness and the target chromaticity coordinates.

[0011] In one embodiment, determining the target region to which the target chromaticity coordinates belong in the chromaticity diagram according to the chromaticity coordinates of each sub-pixel includes:

[0012] Determining, based on the chromaticity coordinates of each sub-pixel, a relative positional relationship between a target chromaticity coordinate point corresponding to the target chromaticity coordinate and a dividing line; the dividing line is a dividing line between the first area and the second area;

[0013] The target region to which the target chromaticity coordinates belong in the chromaticity diagram is determined according to the relative position relationship.

[0014] In one embodiment, the dividing line is a line connecting a first dividing sub-pixel and a second dividing sub-pixel; wherein, determining the relative positional relationship between a target chromaticity coordinate point corresponding to the target chromaticity coordinate and the dividing line based on the chromaticity coordinates of each sub-pixel and the target chromaticity coordinates includes:

[0015] determining a first chromaticity coordinate vector between the first divided sub-pixel and the second divided sub-pixel according to the chromaticity coordinate of the first divided sub-pixel and the chromaticity coordinate of the second divided sub-pixel;

[0016] determining a second chromaticity coordinate vector between the first segmented sub-pixel and the pixel unit according to the chromaticity coordinate of the first segmented sub-pixel and the target chromaticity coordinate of the pixel unit;

[0017] determining a two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector;

[0018] The relative position relationship between the target chromaticity coordinate point and the dividing line is determined according to the two-dimensional cross product.

[0019] In one embodiment, driving the three sub-pixels corresponding to the target area to emit light according to the target brightness and the target chromaticity coordinates includes:

[0020] determining target sub-brightness of the three sub-pixels corresponding to the target area according to the target brightness, the target chromaticity coordinates, the maximum brightness of the display panel, and the chromaticity coordinates of the three sub-pixels corresponding to the target area;

[0021] determining driving current values of the three sub-pixels corresponding to the target area according to target sub-brightness of the three sub-pixels corresponding to the target area and maximum brightness of the three sub-pixels corresponding to the target area;

[0022] According to the driving current values of the three sub-pixels corresponding to the target area, a driving current is output to drive the three sub-pixels corresponding to the target area to emit light.

[0023] In one embodiment, the method further comprises:

[0024] Obtaining the maximum brightness of the display panel, the chromaticity coordinates of each sub-pixel, and the chromaticity coordinates of white light under a preset color gamut standard;

[0025] The maximum brightness of each sub-pixel is determined according to the maximum brightness of the display panel, the chromaticity coordinates of each sub-pixel, and the white light chromaticity coordinates; wherein the maximum brightness of the first sub-pixel and the second sub-pixel are the same.

[0026] In one embodiment, the chromaticity diagram further includes a third region, the third region shares a common boundary line with an adjacent region, and the adjacent region is the first region or the second region; the method further includes:

[0027] When the target area is the third area, the three sub-pixels corresponding to the adjacent area are driven to emit light according to the target brightness and the target chromaticity coordinates.

[0028] In one embodiment, driving the three sub-pixels corresponding to the adjacent areas to emit light according to the target brightness and the target chromaticity coordinates includes:

[0029] Determining corresponding mapped chromaticity coordinates according to the target chromaticity coordinates; wherein a line connecting the mapped chromaticity coordinates and the target chromaticity coordinates is perpendicular to a line connecting the chromaticity coordinate points of the first sub-pixel and the second sub-pixel;

[0030] The three sub-pixels corresponding to the adjacent areas are driven to emit light according to the target brightness and the mapped chromaticity coordinates.

[0031] In one embodiment, determining the target brightness and target chromaticity coordinates of the pixel unit according to the color includes:

[0032] Convert the color into tristimulus values in the CIE color space according to a chromaticity conversion matrix in a preset standard color gamut;

[0033] The target brightness and target chromaticity coordinates of the pixel unit are determined according to the tristimulus values.

[0034] An embodiment of the present application provides a display panel, which drives pixel units to emit light using the above-mentioned method.

[0035] An embodiment of the present application provides a display device, including the display panel as described above.

[0036] The above-mentioned display panel, driving method thereof, and display device obtain the color to be displayed by the pixel unit, determine the target brightness and target chromaticity coordinates of the pixel unit according to the color, determine the target area to which the target chromaticity coordinates belong in the chromaticity diagram according to the chromaticity coordinates of each sub-pixel, and when the target area is the first area or the second area, drive the three sub-pixels corresponding to the target area in the pixel unit to emit light according to the target brightness and target chromaticity coordinates. Since the pixel unit of the display panel includes a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are configured to emit a first green light, a second green light, a blue light, and a red light, respectively, the first green light The light is different from the second green light. Therefore, compared with the related art that only uses one sub-pixel for emitting green light, the display panel provided by the embodiment of the present application has a larger green light color gamut range, which provides hardware support for improving the color gamut coverage and repetition rate of the display panel. In addition, the display panel divides the quadrilateral area formed by the four sub-pixels into two triangular areas through any diagonal line, and drives the three sub-pixels in the corresponding area to emit light according to the target area to which the target chromaticity coordinates corresponding to the color to be displayed by the pixel unit belong, thereby realizing the driving method of the pixel unit from the RGB data format to the R2GB data format, thereby improving the color gamut coverage and repetition rate of the display panel, and realizing ultra-high-definition display. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 is a schematic diagram of the color gamut range of a display panel;

[0039] Figure 2 is a schematic diagram of a pixel unit structure of a display panel according to an embodiment;

[0040] Figure 3 is a schematic diagram of the color gamut range of a display panel according to an embodiment;

[0041] Figure 4 is a schematic flow chart of a method for driving a display panel according to an embodiment;

[0042] Figure 5 is a schematic flow chart of a method for driving a display panel according to another embodiment;

[0043] Figure 6 is a schematic flow chart of a method for driving a display panel according to another embodiment;

[0044] Figure 7 is a schematic flow chart of a method for driving a display panel according to yet another embodiment;

[0045] Figure 8 is a schematic diagram of the color gamut range of a display panel according to another embodiment;

[0046] Figure 9 is a schematic flow chart of a method for driving a display panel according to another embodiment;

[0047] Figure 10 is a schematic structural diagram of a driving device for a display panel according to an embodiment;

[0048] Figure 11 FIG. 1 is a schematic structural diagram of a display device according to an embodiment. DETAILED DESCRIPTION

[0049] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0051] It will be understood that the terms "first," "second," and the like used herein may be used to describe various elements herein, but these elements are not limited by these terms. These terms are used solely to distinguish a first element from another element. For example, a first subpixel may be referred to as a second subpixel, and similarly, a second subpixel may be referred to as a first subpixel without departing from the scope of this application. Both the first subpixel and the second subpixel are subpixels, but they are not the same subpixel.

[0052] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0053] It is understood that “at least one” refers to one or more, “a plurality” refers to two or more, and “at least a portion of an element” refers to a portion or all of an element.

[0054] As used herein, the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the relevant listed items.

[0055] like Figure 1 As shown, the color gamut range of the display panel in the related art is only about 80% of the BT.2020 standard color gamut range.

[0056] In this regard, the embodiments of the present application provide a display panel, a driving method thereof, and a display device, which can improve the BT.2020 color gamut coverage and overlap rate of the display panel to more than 95%, thereby achieving ultra-high-definition display.

[0057] The driving method of the display panel provided in the embodiment of the present application can be applied to Figure 2 The display panel shown in FIG. The display panel includes a plurality of pixel units 10. The pixel unit 10 includes a first sub-pixel 11, a second sub-pixel 12, a third sub-pixel 13, and a fourth sub-pixel 14. The first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 13, and the fourth sub-pixel 14 are sequentially configured to emit a first green light, a second green light, a blue light, and a red light. The first green light is different from the second green light.

[0058] That is, the first sub-pixel 11 is configured to emit a first green light. The second sub-pixel 12 is configured to emit a second green light. The third sub-pixel 13 is configured to emit a blue light. The fourth sub-pixel 14 is configured to emit a red light. The first green light and the second green light have different wavelengths. That is, in the embodiment of the present application, the pixel unit 10 adopts a 2G1B1R structure, where 2G indicates that two sub-pixels emit green light, 1B indicates that one sub-pixel emits blue light, and 1R indicates that one sub-pixel emits red light.

[0059] In some embodiments, the wavelengths of the first green light and the second green light are in the range of 520-550 nm, and the wavelength of the first green light is smaller than the wavelength of the second green light. For example, the wavelength of the first green light is in the range of 520-522 nm, and the wavelength of the second green light is in the range of 548-550 nm. For example, the wavelength of the first green light is 520 nm, and the wavelength of the second green light is 548 nm. For another example, the wavelength of the first green light is 521 nm, and the wavelength of the second green light is 549 nm. For another example, the wavelength of the first green light is 522 nm, and the wavelength of the second green light is 550 nm.

[0060] It should be noted that the above is an exemplary description. In an application, the wavelength of the first green light may also be any other suitable value between 520 and 550 nm. For example, the wavelength of the first green light may be 523 nm, 524 nm, 525 nm, 526 nm, 527 nm, 528 nm, 529 nm, 530 nm, 531 nm, 532 nm, 533 nm, 534 nm, or other values. The wavelength of the second green light may also be any other suitable value between 520 and 550 nm. For example, the wavelength of the second green light may be 535 nm, 536 nm, 537 nm, 538 nm, 539 nm, 540 nm, 541 nm, 542 nm, 543 nm, 544 nm, 545 nm, 546 nm, 547 nm, or other values. The specific wavelength may be determined according to actual display requirements, process and other factors, and is not limited here.

[0061] In the display panel provided by the above embodiment, the first sub-pixel 11 and the second sub-pixel 12 in the pixel unit 10 are configured to emit green light of different wavelengths. Compared with the display panel in the related art where the pixel unit 10 adopts 1G1B1R, the color gamut coverage and coverage of the display panel are improved, which helps to achieve ultra-high-definition display. Figure 1 It can be seen that the color gamut range of the display panel in the related art is most lacking in green light compared to the BT.2020 color gamut range. Therefore, each pixel unit 10 in the present application uses two sub-pixels to emit green light of different wavelengths, which can improve the color gamut coverage of the display panel; and, of the two sub-pixels for emitting green light, one is configured to emit a first green light with a short wavelength, and the other is configured to emit a second green light with a long wavelength. Compared with the related art that only uses one sub-pixel for emitting green light, the green light color gamut range of the display panel provided by the embodiment of the present application is larger. Figure 3 As shown, this improves the color gamut coverage and coverage of the display panel, which helps to achieve ultra-high-definition display.

[0062] In some embodiments, the display panel includes a plurality of pixel units 10, which may be arranged in an array. In applications, the number and arrangement of the pixel units 10 may be set according to actual display requirements and are not limited in detail herein.

[0063] In some embodiments, the first sub-pixel 11 , the second sub-pixel 12 , the third sub-pixel 13 and the fourth sub-pixel 14 all include LEDs, or may all include mirco-LEDs; they may also be other types of light-emitting devices, which are not limited in detail here.

[0064] In some embodiments, the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 13, and the fourth sub-pixel 14 in the pixel unit 10 may be arranged in a square shape. Figure 2 As shown, they may also be arranged in other ways, such as strip arrangement, straight line arrangement, diamond arrangement, rectangular arrangement or any other suitable arrangement, which is not limited here.

[0065] In some embodiments, the wavelength range of blue light is 450-495 nm, and the wavelength range of red light is 620-650 nm. The wavelength of blue light can be any suitable value between 450-495 nm, for example, 450 nm, 452 nm, 454 nm, 456 nm, 458 nm, 460 nm, 465 nm, 470 nm, 475 nm, 480 nm, 485 nm, 495 nm, or any other value between 450-495 nm. This is for illustrative purposes only and is not intended to be limiting. The wavelength of red light can be any suitable value between 620-650 nm, for example, 620 nm, 622 nm, 624 nm, 626 nm, 628 nm, 630 nm, 635 nm, 640 nm, 645 nm, 650 nm, or any other value between 620-650 nm. This is for illustrative purposes only and is not intended to be limiting.

[0066] In some embodiments, as Figure 3 and Figure 4 As shown, a method for driving a display panel is provided, which is applied to Figure 2 Taking the display panel shown as an example, the driving method of the display panel includes the following steps S402 to S408.

[0067] S402: Obtain the color to be displayed by the pixel unit.

[0068] Color refers to the color that the display panel needs to display in the pixel unit 10, which includes the three primary color values in the RGB color space. Exemplarily, the color to be displayed by the pixel unit 10 includes RGB values that conform to the preset standard color gamut. The preset standard color gamut is a pre-set color gamut standard, for example, it can be BT.2020 or the next generation color gamut standard, etc., which is not limited here. The RGB value range of the color is 0~255. For example, the color to be displayed by the pixel unit 10 is represented by the RGB value (190,190,190).

[0069] S404: Determine target brightness and target chromaticity coordinates of the pixel unit according to the color.

[0070] The target brightness refers to the brightness of the color to be displayed by the pixel unit 10 in the CIE Lxy (or xyY) color space, and is used to represent the brightness to be displayed by the pixel unit 10. The target chromaticity coordinates refer to the coordinates of the color of the pixel unit 10 in the CIE Lxy color space, and are used to represent the chromaticity to be displayed by the pixel unit 10. CIE (Commission Internationale de l'Eclairage) refers to the International Commission on Illumination.

[0071] In an application, the color to be displayed can be first converted into tristimulus values in the CIE XYZ color space, and then the tristimulus values are converted into brightness and chromaticity coordinates in the CIE Lxy color space, thereby determining the target brightness and target chromaticity coordinates corresponding to the color to be displayed by the pixel unit 10.

[0072] S406 , determining the target region to which the target chromaticity coordinates belong in the chromaticity diagram according to the chromaticity coordinates of each sub-pixel.

[0073] In the embodiments of the present application, the chromaticity diagram refers to the CIE 1931 chromaticity diagram, which is used to depict the range of all visible colors. The chromaticity diagram includes at least a first region and a second region. The first region and the second region are two triangular regions formed by any diagonal line within the quadrilateral region formed by the chromaticity coordinates of each sub-pixel in the same pixel unit 10.

[0074] It can be understood that the first sub-pixel 11 is configured to emit a first green light, the second sub-pixel 12 is configured to emit a second green light, the third sub-pixel 13 is configured to emit a blue light, and the fourth sub-pixel 14 is configured to emit a red light. Figure 3In the chromaticity diagram shown, the chromaticity coordinate point of the first sub-pixel 11 is recorded as G1, the chromaticity coordinate point of the second sub-pixel 12 is recorded as G2, the chromaticity coordinate point of the third sub-pixel 13 is B, and the chromaticity coordinate point of the fourth sub-pixel 14 is R; based on this, in the same pixel unit 10, the chromaticity coordinate points of the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 13 and the fourth sub-pixel 14 respectively constitute a quadrilateral area RG2G1B.

[0075] The diagonal lines of the quadrilateral region RG2G1B include the diagonal line G2B and the diagonal line RG1. If the diagonal line G2B is used to divide the quadrilateral region RG2G1B, a first region G2G1B and a second region RG2B can be obtained. If the diagonal line RG1 is used to divide the quadrilateral region RG2G1B, a first region RG1B and a second region RG1G2 can be obtained.

[0076] In applications, the quadrilateral region can be divided using any diagonal line within the quadrilateral region to obtain the corresponding first and second regions, without further limitation. For ease of description, along the X-axis of the chromaticity diagram, the first region is defined as the region within the quadrilateral region close to the Y-axis of the chromaticity diagram, and the second region is defined as the region within the quadrilateral region away from the Y-axis.

[0077] After the target chromaticity coordinates of the pixel unit 10 are determined based on the above step S404 , the target area to which the target chromaticity coordinates belong may be determined in the chromaticity diagram.

[0078] S408 , when the target area is the first area or the second area, driving three sub-pixels corresponding to the target area in the pixel unit to emit light according to the target brightness and the target chromaticity coordinates.

[0079] In an application, it can be determined whether the target area is the first area or the second area. If the target area is the first area, the three sub-pixels corresponding to the first area in the pixel unit 10 can be determined to emit light based on the target brightness and target chromaticity coordinates, while the remaining sub-pixel does not emit light. If the target area is the second area, the three sub-pixels corresponding to the second area in the pixel unit 10 can be determined to emit light based on the target brightness and target chromaticity coordinates, while the remaining sub-pixel does not emit light.

[0080] For example, taking the first area as G2G1B and the second area as RG2B as an example, it is determined whether the target area is the first area G2G1B or the second area RG2B; if the target area is the first area G2G1B, the first sub-pixel 11, the second sub-pixel 12 and the third sub-pixel 13 corresponding to the first area G2G1B are driven to emit light according to the target brightness and the target chromaticity coordinates, and the fourth sub-pixel 14 does not emit light; if the target area is the second area RG2B, the second sub-pixel 12, the third sub-pixel 13 and the fourth sub-pixel 14 corresponding to the second area RG2B are driven to emit light according to the target brightness and the target chromaticity coordinates, and the first sub-pixel 11 does not emit light.

[0081] As another example, taking the first area as RG1B and the second area as RG1G2 as an example, it is determined whether the target area is the first area RG1B or the second area RG1G2; if the target area is the first area RG1B, then according to the target brightness and target chromaticity coordinates, the first sub-pixel 11, the third sub-pixel 13 and the fourth sub-pixel 14 corresponding to the first area RG1B are driven to emit light, and the second sub-pixel 12 does not emit light; if the target area is the second area RG1G2, then according to the target brightness and target chromaticity coordinates, the first sub-pixel 11, the second sub-pixel 12 and the fourth sub-pixel 14 corresponding to the second area RG1G2 are driven to emit light, and the third sub-pixel 13 does not emit light.

[0082] The driving method of the display panel provided in the above embodiment obtains the color to be displayed by the pixel unit 10, determines the target brightness and target chromaticity coordinates of the pixel unit 10 according to the color, determines the target area to which the target chromaticity coordinates belong in the chromaticity diagram according to the chromaticity coordinates of each sub-pixel, and when the target area is the first area or the second area, drives the three sub-pixels corresponding to the target area in the pixel unit 10 to emit light according to the target brightness and target chromaticity coordinates. Since the pixel unit 10 of the display panel includes the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 13 and the fourth sub-pixel 14, the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 13 and the fourth sub-pixel 14, the first sub-pixel 11, the second sub-pixel 12, the third sub-pixel 13 and the fourth sub-pixel 14 The fourth sub-pixel 14 is configured to emit a first green light, a second green light, a blue light and a red light in sequence. The first green light is different from the second green light. Therefore, hardware support is provided for improving the color gamut coverage and repetition rate of the display panel. In addition, the display panel divides the quadrilateral area formed by the four sub-pixels into two triangular areas through any diagonal line, and drives the three sub-pixels in the corresponding area to emit light according to the target area to which the target chromaticity coordinates corresponding to the color to be displayed by the pixel unit 10 belong, thereby realizing the driving mode of the pixel unit 10 from the RGB data format to the R2GB data format, thereby improving the color gamut coverage and repetition rate of the display panel, and realizing ultra-high-definition display.

[0083] In some embodiments, step S404, determining the target brightness and target chromaticity coordinates of the pixel unit based on the color, may include the following steps: converting the color into tristimulus values in the CIE color space according to a chromaticity conversion matrix under a preset standard color gamut, and determining the target brightness and target chromaticity coordinates of the pixel unit based on the tristimulus values. In this way, based on the target brightness and target chromaticity coordinates, the color to be displayed by the pixel unit can be converted from RGB data format to R2GB data format, thereby enabling display of pixel units based on the R2GB structure, providing technical support for achieving high color gamut coverage and repetition rate.

[0084] The preset standard color gamut is a pre-set color gamut standard that is the same as the display color of the aforementioned pixel unit. For example, the preset standard color gamut can be BT.2020 or a next-generation color gamut standard, etc., which is not limited in detail here.

[0085] The color gamut conversion matrix is used to convert colors in the RGB color space into tristimulus values in the CIE XYZ color space. For example, if the preset standard color gamut is BT.2020, then according to the corresponding color gamut conversion matrix, the following formula can be used to convert colors into tristimulus values:

[0086] (1)

[0087] in, Represents the normalized RGB value, that is, the RGB value of the color [0~255,0~255,0~255] is normalized to [0~1,0~1,0~1]; Represents the XYZ stimulus value in the CIE XYZ color space; the color conversion matrix is .

[0088] Then, the XYZ stimulus values in the CIE XYZ color space are converted to the luminance and chromaticity coordinates in the CIE Lxy color space using the following formula:

[0089] L=Y*100 (2)

[0090] x =X / (X+Y+Z) (3)

[0091] y =Y / (X+Y+Z) (4)

[0092] Wherein, L represents brightness, which is the brightness after normalization to 100; x and y represent chromaticity coordinates.

[0093] In an application, the color to be displayed by the pixel unit can be normalized. The normalized color, i.e., the RGB value, can be converted into XYZ stimulus values in the CIE XYZ color space according to a color gamut conversion matrix within a preset standard color gamut. The XYZ stimulus values can then be converted into target luminance and target chromaticity coordinates in the CIE Lxy color space. It should be noted that in the embodiments of this application, the target luminance actually refers to luminance, and the target chromaticity coordinates actually refer to chromaticity coordinates. The target prefix is added to refer to the pixel unit.

[0094] In some embodiments, as Figure 5 As shown, step S406, determining the target area of the target chromaticity coordinates in the chromaticity diagram according to the chromaticity coordinates of each sub-pixel, includes the following steps S502 and S504.

[0095] S502 : Determine the relative position relationship between the target chromaticity coordinate point corresponding to the target chromaticity coordinate and the dividing line according to the chromaticity coordinate of each sub-pixel.

[0096] The dividing line is a dividing line between the first area and the second area. The dividing line may include a diagonal line RG1, or a diagonal line G2B such as Figure 3 shown.

[0097] The target chromaticity coordinates uniquely represent the target chromaticity coordinate point in the chromaticity diagram. In other words, the coordinates of the target chromaticity coordinate point in the chromaticity diagram are the target chromaticity coordinates. For ease of description, in the embodiments of this application, the target chromaticity coordinate point is denoted as P.

[0098] The relative position relationship refers to the relative position between the target chromaticity coordinate point and the dividing line. If the dividing line is RG1, the relative position relationship refers to the relative position relationship between the target chromaticity coordinate point P and the dividing line RG1; if the dividing line is G2B, the relative position relationship refers to the relative position relationship between the target chromaticity coordinate point P and the dividing line G2B.

[0099] In the application, when the dividing line is RG1, the relative position relationship between the target chromaticity coordinate point P and the dividing line RG1 can be determined based on the chromaticity coordinates of each sub-pixel; or, when the dividing line is G2B, the relative position relationship between the target chromaticity coordinate point P and the dividing line G2B can be determined based on the chromaticity coordinates of each sub-pixel.

[0100] S504: Determine the target area corresponding to the target chromaticity coordinates in the chromaticity diagram according to the relative position relationship.

[0101] In terms of the X-axis direction of the chromaticity diagram, the relative position relationship includes the target chromaticity coordinate point being located in the negative X-axis direction of the dividing line, the target chromaticity coordinate point being located in the positive X-axis direction of the dividing line, or the target chromaticity coordinate point being located on the dividing line.

[0102] When the target chromaticity coordinate point is located on the negative X-axis direction of the dividing line, the target region to which the target chromaticity coordinates belong in the chromaticity diagram can be determined to be the first region. When the target chromaticity coordinate point is located on the positive X-axis direction of the dividing line, the target region to which the target chromaticity coordinates belong in the chromaticity diagram can be determined to be the second region. When the target chromaticity coordinate point is located on the dividing line, the target region to which the target chromaticity coordinates belong in the chromaticity diagram can be determined to be the first region or the second region.

[0103] The driving method of the display panel provided in the above embodiment determines the relative position relationship between the target chromaticity coordinate point corresponding to the target chromaticity coordinate and the dividing line based on the chromaticity coordinates of each sub-pixel, and determines the target area corresponding to the target chromaticity coordinate in the chromaticity diagram based on the relative position relationship. In this way, by judging the relative position relationship between the target chromaticity coordinate point and the dividing line, the target area to which the target chromaticity coordinate belongs in the chromaticity diagram can be determined, so that when the target area is the first area or the second area, the three sub-pixels corresponding to the target area can be driven to emit light, thereby realizing the conversion of the RGB data format to the R2GB data format, thereby improving the color gamut coverage and overlap rate of the display panel.

[0104] In some embodiments, the dividing line is a line connecting a first dividing sub-pixel and a second dividing sub-pixel. The first dividing sub-pixel and the second dividing sub-pixel are two sub-pixels corresponding to the diagonal line that divides the first region into the second region, among the four sub-pixels of the pixel unit. For example, if the dividing line is RG1, the first dividing sub-pixel and the second dividing sub-pixel are the first sub-pixel and the fourth sub-pixel, respectively. For another example, if the dividing line is G2B, the first dividing sub-pixel and the second dividing sub-pixel are the second sub-pixel and the third sub-pixel, respectively.

[0105] Based on the above, if Figure 6 As shown, step S502, according to the chromaticity coordinates of each sub-pixel and the target chromaticity coordinates, determines the relative position relationship between the target chromaticity coordinate point corresponding to the target chromaticity coordinates and the dividing line, including the following steps S602 to S608.

[0106] S602 : Determine a first chromaticity coordinate vector between the first divided sub-pixel and the second divided sub-pixel according to the chromaticity coordinate of the first divided sub-pixel and the chromaticity coordinate of the second divided sub-pixel.

[0107] S604 : Determine a second chromaticity coordinate vector between the first segmented sub-pixel and the pixel unit according to the chromaticity coordinate of the first segmented sub-pixel and the target chromaticity coordinate of the pixel unit.

[0108] S606: Determine a two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector.

[0109] S608: Determine the relative position relationship between the target chromaticity coordinate point and the dividing line according to the two-dimensional cross product.

[0110] The chromaticity coordinates of the first segmented sub-pixel are (x1, y1), the chromaticity coordinates of the second segmented sub-pixel are (x2, y2), and the target chromaticity coordinates corresponding to the pixel unit are (x, y). Then the first chromaticity coordinate vector is (x2-x1, y2-y1), and the second chromaticity coordinate vector is (x-x1, y-y1). Therefore, the two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector is cross=(x2-x1)*(y-y1)-(y2-y1)*(x-x1).

[0111] When the two-dimensional cross product is equal to 0, it can be determined that the target chromaticity coordinate point is on the dividing line. When the two-dimensional cross product is greater than 0, it can be determined that the target chromaticity coordinate point is on the negative X-axis direction of the dividing line, that is, the target chromaticity coordinate is located in the first region (G2G1B or RG1B). When the two-dimensional cross product is less than 0, it can be determined that the target chromaticity coordinate point is on the positive X-axis direction of the dividing line, that is, the target chromaticity coordinate is located in the second region (RG2B or RG2G1).

[0112] Taking the first segmented sub-pixel as the second sub-pixel and the second segmented sub-pixel as the third sub-pixel as an example, the chromaticity coordinate point of the second sub-pixel is G2(x1, y1), the chromaticity coordinate point of the third sub-pixel is B(x2, y2), and the target chromaticity coordinate point P(x, y), then the first chromaticity coordinate vector G2B=(x2-x1, y2-y1), the second chromaticity coordinate vector G2P=(x-x1, y-y1), therefore, the two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector is cross=(x2-x1)* (y-y1)-(y2-y1)*(x-x1); if the two-dimensional cross product is greater than 0, the target chromaticity coordinate point P is determined to be in the negative direction of the X-axis of the dividing line G2B, that is, the target chromaticity coordinate is located in the first region G2G1B; if the two-dimensional cross product is less than 0, the target chromaticity coordinate point P is determined to be in the positive direction of the X-axis of the dividing line G2B, that is, the target chromaticity coordinate is located in the second region RG2B; if the two-dimensional cross product = 0, the target chromaticity coordinate point P is determined to be on the dividing line G2B. In this case, the target chromaticity coordinate is determined to be located in the second region RG2B.

[0113] It should be noted that the above description is made by taking the dividing line G2B as an example. The process of the case where the dividing line is RG1 is similar to that of the case where the dividing line is G2B, and will not be repeated here.

[0114] The driving method of the display panel provided in the above embodiment determines the first chromaticity coordinate vector between the first divided sub-pixel and the second divided sub-pixel based on the chromaticity coordinates of the first divided sub-pixel and the chromaticity coordinates of the second divided sub-pixel, determines the second chromaticity coordinate vector between the first divided sub-pixel and the pixel unit based on the chromaticity coordinates of the first divided sub-pixel and the target chromaticity coordinates of the pixel unit, determines the two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector, and determines the relative position relationship between the target chromaticity coordinate point and the dividing line based on the two-dimensional cross product. In this way, by calculating the two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector and comparing the two-dimensional cross product with 0, the relative position relationship between the target chromaticity coordinate point and the dividing line can be determined, so that the target area to which the target chromaticity coordinate belongs in the chromaticity diagram can be determined based on the relative position relationship, and then the driving mode of the pixel unit can be determined based on the target area, so as to realize a display panel with high color gamut coverage and repetition rate.

[0115] In some embodiments, as Figure 7 As shown, step S408, driving the three sub-pixels corresponding to the target area to emit light according to the target brightness and the target chromaticity coordinates, may include the following steps S702 to S706.

[0116] S702 , determining target sub-brightness of the three sub-pixels corresponding to the target area according to the target brightness, the target chromaticity coordinates, the maximum brightness of the display panel, and the chromaticity coordinates of the three sub-pixels corresponding to the target area.

[0117] S704 , determining driving current values of the three sub-pixels corresponding to the target area according to the target sub-brightness of the three sub-pixels corresponding to the target area and the maximum brightness of the three sub-pixels corresponding to the target area.

[0118] S706 , outputting a driving current according to the driving current values of the three sub-pixels corresponding to the target area to drive the three sub-pixels corresponding to the target area to emit light.

[0119] The maximum brightness of the display panel refers to the maximum brightness of white light displayed by the display panel, which is preset and can be set according to the display requirements of the display panel. It is not further limited here.

[0120] When the target area is the first area, the three sub-pixels corresponding to the target area are the three sub-pixels corresponding to the first area. When the target area is the second area, the three sub-pixels corresponding to the target area are the three sub-pixels corresponding to the second area.

[0121] The target sub-brightness is the brightness that the three sub-pixels corresponding to the target area need to display. The target sub-brightness of the three sub-pixels corresponding to the target area can be the same or different, depending on the color to be displayed by the pixel unit. The remaining sub-pixel does not emit light, that is, the target sub-brightness of this sub-pixel is 0.

[0122] For ease of description, taking the dividing line G2B and the target area as the second area RG2B as an example, the target sub-brightness of the three sub-pixels corresponding to the second area RG2B can be calculated using the following formula:

[0123] X R= * Y R (5)

[0124] Z R= * Y R (6)

[0125] X G2= * Y G2 (7)

[0126] Z G2= * Y G2 (8)

[0127] X B= * Y B (9)

[0128] Z B= * Y B (10)

[0129] X = X R + X G2+ X B (11)

[0130] Y = Y R + Y G2+ Y B (12)

[0131] Z = Z R + Z G2+ Z B (13)

[0132] (14)

[0133] (15)

[0134] Y = (16)

[0135] Y G1=0 (17)

[0136] Among them, X R 、Y R 、Z R They represent the XYZ stimulus values of the fourth sub-pixel in the CIE XYZ color space; X G2 、Y G2 、Z G2 represent the XYZ stimulus values of the second sub-pixel in the CIE XYZ color space; X B 、Y B 、Z B They represent the XYZ stimulus values of the third sub-pixel in the CIE XYZ color space; X, Y, and Z represent the XYZ stimulus values of the pixel unit in the CIE XYZ color space; respectively represent the chromaticity coordinates of the fourth sub-pixel; respectively represent the chromaticity coordinates of the second sub-pixel; respectively represent the chromaticity coordinates of the third sub-pixel; Respectively represent the target chromaticity coordinates of the pixel unit; Indicates the maximum brightness of the display panel; Indicates the target brightness of the pixel unit; Y G1 Indicates the target sub-brightness of the first sub-pixel.

[0137] Based on the above equations, the target sub-brightness of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel can be obtained respectively: G1 、Y G2 、Y B 、Y R .

[0138] The maximum brightness of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel in the pixel unit can be predetermined and are respectively denoted as Y G1_max 、Y G2_max 、Y B_max 、Y R_max .

[0139] For example, PWM (Pulse Width Modulation) is used to adjust the driving current value of the pixel unit. For example, if 10-bit PWM is used to adjust the driving current value of the pixel unit, that is, the brightness adjustment precision range is 0~1024, then the driving current value of the pixel unit can be calculated using the following formula:

[0140] PWM_G1_out=int( (18)

[0141] PWM_G2_out=int( (19)

[0142] PWM_B_out=int( (20)

[0143] PWM_R_out= int( (twenty one)

[0144] Based on the above example, Y G1 If PWM_R_out is 0, then PWM_R_out is 0, i.e., the first sub-pixel does not emit light. In applications, the current value output by the constant current driver chip can be adjusted according to the driving current value calculated above to achieve precise current control of the pixel unit. The brightness adjustment accuracy range can be set according to the display requirements of the display panel. The above is only an example and can also be any other appropriate accuracy range, which is not further limited here.

[0145] It should be noted that the above description is based on the example of driving the second sub-pixel, the third sub-pixel and the fourth sub-pixel of the second area RG2B to emit light and the first sub-pixel not to emit light; similarly, the situation of driving the first sub-pixel, the second sub-pixel and the third sub-pixel of the first area G2G1B to emit light and the fourth sub-pixel not to emit light is similar, and the situation is also similar when the dividing line is G1R, which will not be repeated here.

[0146] The driving method of the display panel provided in the above embodiment determines the target sub-brightness of the three sub-pixels corresponding to the target area according to the target brightness, the target chromaticity coordinates, the maximum brightness of the display panel and the chromaticity coordinates of the three sub-pixels corresponding to the target area, determines the driving current value of the three sub-pixels corresponding to the target area according to the target sub-brightness of the three sub-pixels corresponding to the target area and the maximum brightness of the three sub-pixels corresponding to the target area, and outputs the driving current according to the driving current value of the three sub-pixels corresponding to the target area to drive the three sub-pixels corresponding to the target area to emit light. In this way, precise control of the driving current of each sub-pixel in the pixel unit is achieved, thereby realizing display based on the pixel unit of the 2G1B1R structure, which helps to improve the color gamut coverage and repetition rate of the display panel.

[0147] In some embodiments, the driving method of the display panel also includes the following steps: obtaining the maximum brightness of the display panel, the chromaticity coordinates of each sub-pixel and the white light chromaticity coordinates under a preset color gamut standard, and determining the maximum brightness of each sub-pixel based on the maximum brightness of the display panel, the chromaticity coordinates of each sub-pixel, and the white light chromaticity coordinates; wherein the maximum brightness of the first sub-pixel and the second sub-pixel are the same.

[0148] For example, the maximum brightness of each sub-pixel in the pixel unit can be determined using the following formula:

[0149] X R= * Y R_max (twenty two)

[0150] Z R= * Y R_max (twenty three)

[0151] X G2= * Y G2_max (twenty four)

[0152] Z G2= * Y G2_max (25)

[0153] X B= * Y B_max (26)

[0154] Z B= * Y B_max (27)

[0155] X W= X R + X G2+ X B (28)

[0156] Y W= Y R_max + Y G2_max+ Y B_max (29)

[0157] Z W= Z R + Z G2+ Z B (30)

[0158] (31)

[0159] (32)

[0160] Y G1_max = Y G2_max (33)

[0161] Among them, X R 、Y R 、Z R They represent the XYZ stimulus values of the fourth sub-pixel in the CIE XYZ color space; X G2 、Y G2 、Z G2 represent the XYZ stimulus values of the second sub-pixel in the CIE XYZ color space; X B 、Y B 、Z B They represent the XYZ stimulus values of the third sub-pixel in the CIE XYZ color space; X W 、Y W 、Z W They represent the XYZ stimulus values of the white point in the CIE XYZ color space; respectively represent the chromaticity coordinates of the fourth sub-pixel; respectively represent the chromaticity coordinates of the second sub-pixel; respectively represent the chromaticity coordinates of the third sub-pixel; Represent the chromaticity coordinates of white light respectively.

[0162] Based on the above equations, the maximum brightness of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel can be obtained respectively: G1_max 、Y G2_max 、Y B_max 、Y R_max This provides technical support for subsequent current regulation of each sub-pixel within the pixel unit. In applications, the current sampling register of the constant current driver chip can be adjusted based on the maximum brightness requirements of each primary color, setting the current of the constant current driver chip to achieve the desired maximum brightness for each primary color.

[0163] In some embodiments, the chromaticity diagram further includes a third region. The third region can be understood as a preset standard color gamut region not covered by the quadrilateral region RG2G1B. Figure 4As shown, the third area is located above the straight line where G1G2 is located. The third area shares a common boundary line with the adjacent area, and the adjacent area is the first area or the second area. The common boundary line is the line segment G1G2. For example, if the first area is G2G1B and the second area is RG2B, then the adjacent area is G2G1B. For another example, if the first area is RG1B and the second area is RG2G1, then the adjacent area is RG2G1. In application, the adjacent area can be determined according to the specific segmentation method of the first area and the second area, which is not limited here.

[0164] Based on the above, the display panel driving method further includes the following steps: when the target area is the third area, driving the three sub-pixels corresponding to the adjacent area to emit light based on the target brightness and target chromaticity coordinates. That is, when the target chromaticity coordinates are in the third area, the three sub-pixels corresponding to the adjacent area are driven to emit light, and the remaining sub-pixel is not emitted.

[0165] For example, if the adjacent region is G2G1B, the first, second, and third sub-pixels corresponding to the adjacent region G2G1B are driven to emit light, while the fourth sub-pixel is not. For another example, if the adjacent region is RG2G1, the first, second, and fourth sub-pixels corresponding to the adjacent region RG2G1 are driven to emit light, while the third sub-pixel is not.

[0166] In the driving method of the display panel provided by the above embodiment, the target chromaticity coordinates are located in the third area, indicating that the color to be displayed by the target pixel unit has exceeded the color range that the display panel can represent. In this case, the three sub-pixels corresponding to the adjacent area closest to the third area are driven for alternative display, thereby ensuring the high color gamut coverage and repetition rate of the display panel.

[0167] In some embodiments, the above step of driving the three sub-pixels corresponding to the second area to emit light based on the target brightness and target chromaticity coordinates may include the following steps: determining corresponding mapped chromaticity coordinates based on the target chromaticity coordinates, and driving the three sub-pixels corresponding to the second area to emit light based on the target brightness and the mapped chromaticity coordinates. The line connecting the mapped chromaticity coordinates and the target chromaticity coordinates is perpendicular to the line connecting the chromaticity coordinates of the first sub-pixel and the second sub-pixel.

[0168] like Figure 8 As shown, the chromaticity coordinate G1 of the first sub-pixel is (x G1 , y G1 ), the chromaticity coordinate G2 of the second sub-pixel is (x G2 , y G2 ), the target chromaticity coordinate P is (x, y), and the mapping chromaticity coordinate F is (x Foot ,y Foot ), the mapping chromaticity coordinates can be calculated using the following formula:

[0169] a = y G2 -y G1 (34)

[0170] b = x G1 -x G2 (35)

[0171] c = a * x G1 + b * y G1 (36)

[0172] x Foot = (b * b * x - a * b * y - a * c) / (a * a + b * b) (37)

[0173] y Foot = (a * a * y - a * b * x - b * c) / (a * a + b * b) (38)

[0174] After the above calculation, Lxy above G1G2 is converted to L,x by the latest color replacement. Foot ,y Foot , at this time L,x Foot ,y Foot In the adjacent area, based on this, the above-mentioned driving method can be used to calculate the brightness of each primary color and control the pixel driving constant current.

[0175] It can be understood that if the target chromaticity coordinates are located above the third area, that is, the straight line where G1G2 is located, it indicates that the color to be displayed by the pixel unit 10 has exceeded the color range that the display panel can represent. In view of the fact that the color gamut coverage and repetition rate of the display panel provided in the embodiment of the present application are relatively high, which can reach 95% of the BT.2020 color gamut range, therefore, in order to ensure that more than 95% of the colors can be presented, the colors that exceed the color gamut range of the display panel (that is, the third area) are displayed by color replacement, that is, the mapped chromaticity coordinates are used to replace the target chromaticity coordinates, and the target brightness remains unchanged, that is, the grayscale level of the original color is maintained. In this way, color display within the full color gamut is achieved, and the high color gamut coverage and repetition rate of the display panel are guaranteed.

[0176] In some embodiments, as Figure 9 As shown, a method for driving a display panel is provided, which is applied to Figure 2The display panel shown in FIG. 1 is used as an example for explanation. Each sub-pixel uses an LED, and the wavelength of the first green light emitted by the first sub-pixel 11 is 520 nm, and the wavelength of the second green light emitted by the second sub-pixel 12 is 550 nm. The driving method of the display panel includes the following steps S902 to S922.

[0177] S902: Obtain the color to be displayed by the pixel unit.

[0178] For example, the color to be displayed by the pixel unit 10 is an RGB value in the range of [0-255, 0-255, 0-255].

[0179] S904: Convert the color into tristimulus values in the CIE color space according to a chromaticity conversion matrix in a preset standard color gamut.

[0180] The color to be displayed is normalized, and then the normalized RGB value is converted into the XYZ stimulus value in the CIE XYZ color space using the above formula (1) according to the color gamut conversion matrix in the BT.2020 standard color gamut.

[0181] S906: Determine target brightness and target chromaticity coordinates of the pixel unit according to the tristimulus values.

[0182] The XYZ stimulus values are converted into luminance and chromaticity coordinates in the CIE Lxy color space using the aforementioned formulas (2), (3), and (4), and the target luminance L and target chromaticity coordinates x, y of the pixel unit 10 are obtained.

[0183] S908 : Determine a first chromaticity coordinate vector between the first divided sub-pixel and the second divided sub-pixel according to the chromaticity coordinate of the first divided sub-pixel and the chromaticity coordinate of the second divided sub-pixel.

[0184] S910 , determining a second chromaticity coordinate vector between the first segmented sub-pixel and the pixel unit according to the chromaticity coordinate of the first segmented sub-pixel and the target chromaticity coordinate of the pixel unit.

[0185] S912: Determine a two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector.

[0186] S914: Determine the relative position relationship between the target chromaticity coordinate point and the dividing line according to the two-dimensional cross product.

[0187] S916: Determine the target area to which the target chromaticity coordinates belong in the chromaticity diagram according to the relative position relationship.

[0188] The dividing line is G2B, then the first dividing sub-pixel is the second sub-pixel 12, the second dividing sub-pixel is the third sub-pixel 13, the first area is G2G1B, and the second area is RG2B; if the chromaticity coordinate point of the second sub-pixel 12 is G2(x1, y1), the chromaticity coordinate point of the third sub-pixel 13 is B(x2, y2), and the target chromaticity coordinate point is P(x, y), then the first chromaticity coordinate vector G2B=(x2-x1, y2-y1), the second chromaticity coordinate vector G2P=(x-x1, y-y1), and the two-dimensional cross product cross=(x2-x1)*(y-y1)-(y2-y1)*(x-x1).

[0189] If the two-dimensional cross product is greater than 0, the target chromaticity coordinate point P is determined to be in the negative direction of the X-axis of the dividing line G2B, that is, the target chromaticity coordinate is located in the first region G2G1B; if the two-dimensional cross product is less than 0, the target chromaticity coordinate point P is determined to be in the positive direction of the X-axis of the dividing line G2B, that is, the target chromaticity coordinate is located in the second region RG2B; if the two-dimensional cross product = 0, the target chromaticity coordinate point P is determined to be on the dividing line G2B. In this case, the target chromaticity coordinate is determined to be located in the second region RG2B.

[0190] S918 , determining target sub-brightness of the three sub-pixels corresponding to the target area according to the target brightness, the target chromaticity coordinates, the maximum brightness of the display panel, and the chromaticity coordinates of the three sub-pixels corresponding to the target area.

[0191] S920 , determining driving current values of the three sub-pixels corresponding to the target area according to the target sub-brightness of the three sub-pixels corresponding to the target area and the maximum brightness of the three sub-pixels corresponding to the target area.

[0192] S922 , outputting a driving current according to the driving current values of the three sub-pixels corresponding to the target area to drive the three sub-pixels corresponding to the target area to emit light.

[0193] When the target area is the second area RG2B, the target sub-brightness of the second sub-pixel 12, the third sub-pixel 13 and the fourth sub-pixel 14 corresponding to the second area RG2B are calculated using the above formulas (5) to (17), which are Y G2 、Y B 、Y R , and the first sub-pixel 11Y G1The target sub-brightness is 0. Then, the driving current values of the second sub-pixel 12, the third sub-pixel 13, and the fourth sub-pixel 14 are calculated using the aforementioned formulas (18) to (21), which are PWM_G2_out, PWM_B_out, and PWM_R_out, respectively. Among them, the driving current value PWM_G1_out of the first sub-pixel 11 is 0. Thus, the second sub-pixel 12, the third sub-pixel 13, and the fourth sub-pixel 14 in the pixel unit 10 are driven to emit light according to the driving current value, while the first sub-pixel 11 does not emit light.

[0194] In the case where the target area is the first area G2G1B, the driving process is similar to the aforementioned driving process when the target area is the second area RG2B, and will not be repeated here.

[0195] When the target area is the third area, i.e., above the G2G1 straight line, the mapping chromaticity coordinate F is first calculated using the aforementioned formulas (34) to (38) and used as the new target chromaticity coordinate. Then, the driving process is similar to the aforementioned driving process when the target area is the second area RG2B, and will not be repeated here.

[0196] The driving method of the display panel provided in the embodiment of the present application is that each pixel unit 10 includes a first sub-pixel 11, a second sub-pixel 12, a third sub-pixel 13 and a fourth sub-pixel 14, wherein the first sub-pixel 11 and the second sub-pixel 12 are respectively configured to emit green light of different wavelengths, the third sub-pixel 13 is configured to emit blue light, and the fourth sub-pixel 14 is configured to emit red light, thereby providing hardware support for improving the color gamut range of the display panel; based on this, the quadrilateral area formed by the chromaticity coordinates of the four sub-pixels of the pixel unit 10 in the chromaticity diagram is divided into two triangular areas, and according to the area where the color to be displayed by the pixel unit 10 is located, the color is converted from the RGB data format to the R2GB data format, thereby realizing the driving of the three sub-pixels in the pixel unit 10, so that the color gamut range of the display panel can reach more than 95% of the BT.2020 standard color gamut range, realizing ultra-high-definition display.

[0197] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0198] Based on the same inventive concept, embodiments of the present application further provide a display panel driving device for implementing the aforementioned display panel driving method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of the one or more display panel driving device embodiments provided below can be found in the aforementioned limitations of the display panel driving method and will not be further elaborated here.

[0199] In some embodiments, as Figure 10 As shown, a display panel driving device 1000 is provided. The device is applied to a display panel, wherein the display panel includes a pixel unit, wherein the pixel unit includes a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. The first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are sequentially configured to emit a first green light, a second green light, a blue light, and a red light, wherein the first green light is different from the second green light. A detailed description of the display panel can be found in the relevant description above and will not be repeated here.

[0200] The driving device 1000 of the display panel includes an acquisition module 1001, a determination module 1002 and a driving module 1003. The acquisition module 1001 is used to obtain the color to be displayed by the pixel unit. The determination module 1002 is used to determine the target brightness and target chromaticity coordinates of the pixel unit according to the color, and determine the target area to which the target chromaticity coordinates belong in the chromaticity diagram according to the chromaticity coordinates of each sub-pixel; wherein the chromaticity diagram includes at least a first area and a second area, and the first area and the second area are two triangular areas formed by any diagonal line in the quadrilateral area formed by the chromaticity coordinate points of each sub-pixel. The driving module 1003 is used to drive the three sub-pixels corresponding to the target area in the pixel unit to emit light according to the target brightness and target chromaticity coordinates when the target area is the first area or the second area.

[0201] In some embodiments, the determination module is also used to determine the relative position relationship between the target chromaticity coordinate point corresponding to the target chromaticity coordinate and the dividing line based on the chromaticity coordinates of each sub-pixel, and determine the target area to which the target chromaticity coordinate belongs in the chromaticity diagram based on the relative position relationship; the dividing line is the dividing line between the first area and the second area.

[0202] In some embodiments, the dividing line is a line connecting the first dividing sub-pixel and the second dividing sub-pixel; wherein the determination module is further used to determine the first chromaticity coordinate vector between the first dividing sub-pixel and the second dividing sub-pixel based on the chromaticity coordinates of the first dividing sub-pixel and the chromaticity coordinates of the second dividing sub-pixel; determine the second chromaticity coordinate vector between the first dividing sub-pixel and the pixel unit based on the chromaticity coordinates of the first dividing sub-pixel and the target chromaticity coordinates of the pixel unit; determine the two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector; and determine the relative position relationship between the target chromaticity coordinate point and the dividing line based on the two-dimensional cross product.

[0203] In some embodiments, the driving module is also used to determine the target sub-brightness of the three sub-pixels corresponding to the target area based on the target brightness, the target chromaticity coordinates, the maximum brightness of the display panel and the chromaticity coordinates of the three sub-pixels corresponding to the target area; determine the driving current value of the three sub-pixels corresponding to the target area based on the target sub-brightness of the three sub-pixels corresponding to the target area and the maximum brightness of the three sub-pixels corresponding to the target area; and output the driving current according to the driving current value of the three sub-pixels corresponding to the target area to drive the three sub-pixels corresponding to the target area to emit light.

[0204] In some embodiments, the acquisition module is further configured to acquire the maximum brightness of the display panel, the chromaticity coordinates of each subpixel, and the white light chromaticity coordinates under a preset color gamut standard. The determination module is further configured to determine the maximum brightness of each subpixel based on the maximum brightness of the display panel, the chromaticity coordinates of each subpixel, and the white light chromaticity coordinates; wherein the maximum brightness of the first subpixel and the second subpixel are the same.

[0205] In some embodiments, the chromaticity diagram also includes a third area, the third area shares a common boundary line with the adjacent area, and the adjacent area is the first area or the second area; the driving module is also used to drive the three sub-pixels corresponding to the adjacent area to emit light according to the target brightness and target chromaticity coordinates when the target area is the third area.

[0206] In some embodiments, the driving module is also used to determine the corresponding mapping chromaticity coordinates based on the target chromaticity coordinates; wherein, the line connecting the mapping chromaticity coordinates and the target chromaticity coordinates is perpendicular to the line connecting the chromaticity coordinate points of the first sub-pixel and the second sub-pixel; and according to the target brightness and the mapping chromaticity coordinates, the three sub-pixels corresponding to the adjacent areas are driven to emit light.

[0207] In some embodiments, the determination module is further configured to convert the color into tristimulus values in the CIE color space according to a chromaticity conversion matrix in a preset standard color gamut; and determine the target brightness and target chromaticity coordinates of the pixel unit according to the tristimulus values.

[0208] Each module in the aforementioned display panel driver device may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0209] In one embodiment, a display device is provided. The display device may be a terminal, and its internal structure diagram may be as follows: Figure 11 As shown. The display device includes a processor, memory, a communication interface, a display screen, and an input device connected via a system bus. The processor of the display device is used to provide computing and control capabilities. The memory of the display device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The communication interface of the display device is used to communicate with an external terminal via wired or wireless communication. The wireless communication method can be achieved through Wi-Fi, a mobile cellular network, NFC (near-field communication), or other technologies. When the computer program is executed by the processor, a method for driving a display panel is implemented. The display screen of the display device can be a liquid crystal display or an electronic ink display. The input device of the display device can be a touch layer covering the display screen, or it can be a key, trackball, or touchpad provided on the display device housing, or it can be an external keyboard, touchpad, or mouse.

[0210] Those skilled in the art will understand that Figure 11 The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the display device to which the scheme of the present application is applied. The specific display device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0211] In one embodiment, a display panel is provided, which can drive pixel units to emit light using the aforementioned method.

[0212] In one embodiment, a display device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps of the aforementioned method when executing the computer program.

[0213] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the aforementioned method are implemented.

[0214] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the aforementioned method when executed by a processor.

[0215] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0216] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like.

[0217] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0218] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for driving a display panel, characterized in that: The display panel includes a pixel unit, the pixel unit includes a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are sequentially configured to emit a first green light, a second green light, a blue light, and a red light, wherein the first green light is different from the second green light; and the method includes: Obtaining the color to be displayed by the pixel unit; determining a target brightness and a target chromaticity coordinate of the pixel unit according to the color; Determining, based on the chromaticity coordinates of each sub-pixel, a target region to which the target chromaticity coordinates belong in a chromaticity diagram; wherein the chromaticity diagram includes at least a first region and a second region, the first region and the second region being two triangular regions formed by any diagonal line within a quadrilateral region formed by the chromaticity coordinates of each sub-pixel; In a case where the target area is the first area or the second area, three sub-pixels corresponding to the target area in the pixel unit are driven to emit light according to the target brightness and the target chromaticity coordinates.

2. The method according to claim 1, characterized in that The determining, based on the chromaticity coordinates of each sub-pixel, a target region to which the target chromaticity coordinates belong in the chromaticity diagram includes: Determining, based on the chromaticity coordinates of each sub-pixel, a relative positional relationship between a target chromaticity coordinate point corresponding to the target chromaticity coordinate and a dividing line; the dividing line is a dividing line between the first area and the second area; The target region to which the target chromaticity coordinates belong in the chromaticity diagram is determined according to the relative position relationship.

3. The method according to claim 2, characterized in that The segmentation line is a line connecting the first segmentation sub-pixel and the second segmentation sub-pixel; wherein, determining the relative position relationship between the target chromaticity coordinate point corresponding to the target chromaticity coordinate and the segmentation line based on the chromaticity coordinates of each sub-pixel and the target chromaticity coordinates includes: determining a first chromaticity coordinate vector between the first divided sub-pixel and the second divided sub-pixel according to the chromaticity coordinate of the first divided sub-pixel and the chromaticity coordinate of the second divided sub-pixel; determining a second chromaticity coordinate vector between the first segmented sub-pixel and the pixel unit according to the chromaticity coordinate of the first segmented sub-pixel and the target chromaticity coordinate of the pixel unit; determining a two-dimensional cross product between the first chromaticity coordinate vector and the second chromaticity coordinate vector; The relative position relationship between the target chromaticity coordinate point and the dividing line is determined according to the two-dimensional cross product.

4. The method according to any one of claims 1 to 3, characterized in that The step of driving the three sub-pixels corresponding to the target area to emit light according to the target brightness and the target chromaticity coordinates includes: determining target sub-brightness of the three sub-pixels corresponding to the target area according to the target brightness, the target chromaticity coordinates, the maximum brightness of the display panel, and the chromaticity coordinates of the three sub-pixels corresponding to the target area; determining driving current values of the three sub-pixels corresponding to the target area according to target sub-brightness of the three sub-pixels corresponding to the target area and maximum brightness of the three sub-pixels corresponding to the target area; According to the driving current values of the three sub-pixels corresponding to the target area, a driving current is output to drive the three sub-pixels corresponding to the target area to emit light.

5. The method according to claim 4, characterized in that The method further comprises: Obtaining the maximum brightness of the display panel, the chromaticity coordinates of each sub-pixel, and the chromaticity coordinates of white light under a preset color gamut standard; The maximum brightness of each sub-pixel is determined according to the maximum brightness of the display panel, the chromaticity coordinates of each sub-pixel, and the white light chromaticity coordinates; wherein the maximum brightness of the first sub-pixel and the second sub-pixel are the same.

6. The method according to any one of claims 1 to 3, characterized in that The chromaticity diagram further includes a third region, the third region shares a common boundary line with an adjacent region, and the adjacent region is the first region or the second region; the method further includes: When the target area is the third area, the three sub-pixels corresponding to the adjacent area are driven to emit light according to the target brightness and the target chromaticity coordinates.

7. The method according to claim 6, characterized in that The driving of the three sub-pixels corresponding to the adjacent areas to emit light according to the target brightness and the target chromaticity coordinates includes: Determining corresponding mapped chromaticity coordinates according to the target chromaticity coordinates; wherein a line connecting the mapped chromaticity coordinates and the target chromaticity coordinates is perpendicular to a line connecting the chromaticity coordinate points of the first sub-pixel and the second sub-pixel; The three sub-pixels corresponding to the adjacent areas are driven to emit light according to the target brightness and the mapped chromaticity coordinates.

8. The method according to any one of claims 1 to 3, characterized in that Determining the target brightness and target chromaticity coordinates of the pixel unit according to the color includes: Convert the color into tristimulus values in the CIE color space according to a chromaticity conversion matrix in a preset standard color gamut; The target brightness and target chromaticity coordinates of the pixel unit are determined according to the tristimulus values.

9. A display panel, characterized in that: The display panel drives pixel units to emit light using the method according to any one of claims 1 to 8.

10. A display device, characterized in that: Comprising the display panel as claimed in claim 9.

Images