WO2018214516A1 - 用于补偿显示面板的亮度的方法、显示面板以及显示装置 - Google Patents

用于补偿显示面板的亮度的方法、显示面板以及显示装置 Download PDF

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WO2018214516A1
WO2018214516A1 PCT/CN2018/071584 CN2018071584W WO2018214516A1 WO 2018214516 A1 WO2018214516 A1 WO 2018214516A1 CN 2018071584 W CN2018071584 W CN 2018071584W WO 2018214516 A1 WO2018214516 A1 WO 2018214516A1
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area
pixel
display
dark
pixels
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PCT/CN2018/071584
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English (en)
French (fr)
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张�浩
朱健超
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京东方科技集团股份有限公司
鄂尔多斯市源盛光电有限责任公司
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Priority to US16/083,315 priority Critical patent/US11037485B2/en
Publication of WO2018214516A1 publication Critical patent/WO2018214516A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0232—Special driving of display border areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • Embodiments of the present disclosure relate to the field of display technologies, and in particular, to a method, a display panel, and a display device for compensating for brightness of a display panel.
  • display panels for smart wearable devices typically employ a non-rectangular design such as a circular or elliptical shape.
  • Embodiments of the present disclosure provide a method and a display display panel for compensating for brightness of a display panel.
  • a method for compensating for brightness of a display panel may include: a display area and a non-display area, the display area and the non-display area having a boundary therebetween The boundary passes through the pixel area and the non-pixel area of the display panel, and the portion of the non-pixel area located in the display area constitutes a dark area in the display area, and the method may include: based on the dark area An area that determines brightness of adjacent pixels adjacent to the dark area in the display pixels in the pixel area to compensate for brightness of the dark area by brightness of the neighboring pixels.
  • the determined brightness of the neighboring pixels may include a base portion and a compensation portion for compensating for brightness of the dark region, the base portion and a portion of the corresponding neighboring pixel located within the display region
  • the area is proportional to the ratio of the area of a single pixel; for each dark area, the sum of the compensation portions of all adjacent pixels is proportional to the ratio of the area of the dark area to the area of a single pixel.
  • the neighboring pixels may include at least two adjacent side pixels having a common edge with the dark area.
  • the brightness of the adjacent side pixels may be determined by the following formula:
  • L(P i ) is the luminance of the i-th neighboring pixel
  • S is the area of a single pixel
  • S Pi is the location of the ith adjacent pixel
  • a is an area of the dark area
  • d i is a distance from a center of the i-th adjacent pixel to a center of the dark area
  • L is a division in the display area The display brightness of a single pixel other than the adjacent pixel in a predetermined color.
  • the brightness of the adjacent side pixels may be determined by the following formula:
  • L(P i ) is the luminance of the i-th neighboring pixel
  • S is the area of a single pixel
  • S Pi is the i-th neighboring pixel The area of the portion located within the display area
  • a is the area of the dark area
  • b i is the length of the common portion of the edge of the i-th adjacent pixel and the edge of the dark area
  • L is the The display brightness of a single pixel other than the adjacent pixels in the display area under a predetermined color.
  • the neighboring pixels may include at least two adjacent side pixels having a common edge with the dark area and diagonal pixels disposed diagonally to the dark area.
  • the brightness of the adjacent side pixels may be determined by the following formula:
  • the brightness of the diagonal pixels can be determined by the following formula:
  • the brightness of the adjacent side pixels may be determined by the following formula:
  • the brightness of the neighboring pixels can be determined by the following equation:
  • L(P i ) is the luminance of the i-th neighboring pixel
  • L(P 3 ) is the luminance of the diagonal pixel
  • S is the area of a single pixel
  • S Pi is the first The area of a portion of the i adjacent pixels located within the display area
  • a is the area of the dark area
  • L is a single pixel of the display area other than the neighboring pixels under a predetermined color Display brightness.
  • a pixel intersecting the boundary in the pixel area is a boundary pixel
  • the boundary pixel may have a first portion located in the display area and a second portion located outside the display area a portion, when the ratio of an area of the first portion to an area of a single pixel is less than a predetermined threshold, the boundary pixel is set as a non-display pixel, and the dark area may further include the boundary pixel being located in the display area The first part of the.
  • the display in the pixel area may be determined based on an area of the dark area having the smallest area among the different dark areas.
  • the brightness of adjacent pixels in the pixel that are adjacent to the dark region may be determined based on an area of the dark area having the smallest area among the different dark areas.
  • the darkness of the display pixels in the pixel area may be determined based on the average area of the different dark areas.
  • the brightness of adjacent pixels adjacent to the area may be determined based on the average area of the different dark areas.
  • the predetermined threshold is 50%.
  • the display panel may further include a thin film transistor for driving the pixel, wherein a width to length ratio of the thin film transistor for driving the adjacent pixel may be determined by: determining the Determining a brightness of a neighboring pixel adjacent to the dark area, determining a current of the thin film transistor for driving the corresponding adjacent pixel; and determining a width to length ratio of the thin film transistor based on the current.
  • the display area may have a circular or elliptical shape.
  • a display panel may include: a display area and a non-display area, wherein the display area and the non-display area have a boundary, the boundary passes through a pixel area and a non-pixel area of the display panel, and the non-pixel area is located a portion in the display area constitutes a dark area in the display area, and a width to length ratio of a thin film transistor for driving adjacent pixels adjacent to the dark area is set to be used for driving in the display area
  • the thin film transistors of the pixels other than the adjacent pixels have different width to length ratios in order to compensate the brightness of the dark regions by the brightness of the adjacent pixels.
  • the neighboring pixels may include at least two adjacent side pixels having a common edge with the dark area.
  • the neighboring pixels may include at least two adjacent side pixels having a common edge with the dark area and diagonal pixels disposed diagonally to the dark area.
  • a pixel intersecting the boundary in the pixel area is a boundary pixel
  • the boundary pixel may have a first portion located in the display area and a second portion located outside the display area a portion, when the ratio of an area of the first portion to an area of a single pixel is less than a predetermined threshold, the boundary pixel is set as a non-display pixel, and the dark area may further include the non-display pixel located in the display area The first part within.
  • a display device may include the above display panel.
  • FIG. 1 illustrates a schematic diagram of an exemplary display panel in accordance with an embodiment of the present disclosure
  • Figure 2 is an enlarged view of a region C within a broken line in Figure 1;
  • FIG. 3 illustrates an exemplary flowchart of a method of determining a width to length ratio of a TFT for driving adjacent pixels in an embodiment of the present disclosure
  • FIG. 4 illustrates a partial schematic view of another exemplary display panel in accordance with an embodiment of the present disclosure
  • FIG. 5 exemplarily shows one pixel and a thin film transistor for driving the pixel to emit light
  • FIG. 6 illustrates an exemplary flow chart of a method for compensating for brightness of a display panel, in accordance with an embodiment of the present disclosure.
  • each pixel has a rectangular design.
  • the pixels located at the edge of the display panel will not completely match the edges of the display panel. That is, there is a blank area where pixels cannot be arranged at the edge of the display panel, thereby forming a stepped structure having a dark area near the edge of the display panel.
  • the blank area in the staircase structure cannot be illuminated, the user can see the difference in brightness caused by the step structure when displayed, thereby affecting the display effect.
  • FIG. 1 shows a schematic view of an exemplary display panel in an embodiment of the present disclosure
  • FIG. 2 shows an enlarged view of a region C within a broken line in FIG. 1.
  • the display panel includes a display area 21 and a non-display area 22 with a boundary 23 between the display area 21 and the non-display area 22, the border 23 passing through the pixel area 24 of the display panel (ie, arranged with The area of the pixel) and the no-pixel area 25 (ie, the area where no pixels are arranged).
  • the portion of the non-pixel area 25 located inside the display area 21 constitutes the dark area 26 in the display area 21.
  • the display area 21 may be the area where the dial of the smart watch is located, and the non-display area 22 may be the area where the cap of the smart watch is located.
  • the display area 21 and the non-display area 22 are separated by the boundary 23.
  • FIG. 3 illustrates an exemplary flow chart of a method for compensating for brightness of a display panel, in accordance with an embodiment of the present disclosure.
  • the method for compensating for the brightness of the display panel includes step 301.
  • the brightness of adjacent pixels adjacent to the dark area in the display pixels in the pixel area 24 is determined based on the area of the dark area to compensate for the brightness of the dark area by the brightness of the adjacent pixels.
  • the "display pixel in the pixel area” refers to a pixel that emits light when the display panel displays an image.
  • the method provided by the embodiment of the present disclosure by compensating the luminance of the dark region based on the luminance of the adjacent pixels adjacent to the dark region determined based on the area of the dark region, it is possible to reduce the difference between the luminance of the dark region and the luminance of the adjacent pixels, so that This difference is not obvious to the user.
  • the neighboring pixels may include adjacent side pixels having a common edge with the dark area and diagonal pixels disposed diagonally to the dark area.
  • the dark region 26a having two adjacent sides of the pixel P 1, P 2, and a diagonal pixel P 3.
  • the dark area 26 may also have more than two adjacent side pixels depending on the arrangement of the pixels in the display panel.
  • the dark area 26b shown in FIG. 2 has three adjacent side pixels.
  • described in detail herein merely a dark region 26 having two adjacent sides of the pixel P 1, P 2 of the embodiment. It should be understood that embodiments having more than two adjacent side pixels are equally suitable for the present disclosure.
  • the luminance of the neighboring pixels determined in step 301 may be divided into two parts: a base portion for normal display of adjacent pixels; and a compensation portion for compensating for brightness of the dark region.
  • the base portion is proportional to the ratio of the area of the portion of the neighboring pixel in each of the dark regions that is located within the display region to the area of the individual pixels; and for each dark region, the sum of the compensation portions of all adjacent pixels and the area of the dark region and the single The ratio of the area of the pixels is proportional.
  • the luminance of the adjacent pixels is divided into the base portion and the compensation portion only for convenience of description.
  • the brightness of adjacent pixels acts as a whole, on the one hand for the need to illuminate adjacent pixels themselves, and on the other hand to increase the brightness of adjacent dark areas.
  • the brightness of the adjacent side pixels P 1 , P 2 can be determined by the following formula:
  • L(P 1 ) and L(P 2 ) are the luminances of the determined adjacent side pixels P 1 and P 2 , respectively;
  • S is the area of a single pixel;
  • S P1 and S P2 are adjacent side pixels P 1 and P 2 , respectively.
  • a is the area of the dark area 26a;
  • d 1 and d 2 are the distances from the center of the adjacent side pixels P 1 , P 2 to the center of the corresponding dark area 26a, respectively;
  • L is the display area
  • the base portion of the luminance of the adjacent side pixels P 1 , P 2 is equal to the ratio of the area of the portion of the corresponding adjacent side pixel located within the display area to the area of the single pixel multiplied by the display brightness of the individual pixel at the predetermined color, which is, with
  • the compensation portion of the luminance of the adjacent side pixels P 1 , P 2 is equal to the ratio of the area of the dark area 26a to the area of the single pixel multiplied by the distance of the single adjacent side pixel to the center of the dark area 26a and the adjacent side pixels P 1 , P 2 to The ratio of the sum of the distances of the centers of the dark areas 26a, and then multiplied by the display brightness of a single pixel in a predetermined color, ie, with It can be seen from equations (1) and (2) that the sum of the compensation portions of the luminances of the adjacent pixels P 1 and P 2 is proportional to the ratio of the area of the dark region to the area of the individual pixels, that is, equal to
  • P 1 P luminance to achieve compensation for the luminance dark area 26a by adjusting the dark area adjacent sides of the pixel 26a, and the dark areas 26a, P 3 may have diagonal pixel Other pixels have the same or similar brightness.
  • the brightness of the adjacent side pixels P 1 , P 2 can be determined by the following formula:
  • L(P 1 ) and L(P 2 ) are the luminances of the determined adjacent side pixels P 1 and P 2 , respectively;
  • S is the area of a single pixel;
  • S P1 and S P2 are adjacent side pixels P 1 and P 2 , respectively.
  • a is the area of the dark area 26a;
  • b 1 and b 2 are the lengths of the edges of the adjacent side pixels P 1 , P 2 and the common portion of the edge of the corresponding dark area 26a, respectively;
  • the base portion of the luminance of the adjacent side pixels P 1 , P 2 is equal to the ratio of the area of the portion of the corresponding adjacent side pixel located within the display area to the area of the single pixel multiplied by the display brightness of the individual pixel at the predetermined color, which is, with
  • the compensation portion of the luminance of the adjacent side pixels P 1 , P 2 is equal to the ratio of the area of the dark area 26a to the area of the single pixel multiplied by the length of the common portion of the edge of the single adjacent side pixel and the edge of the dark area 26a and the adjacent side pixel P 1 , the ratio of the sum of the edges of P 2 and the length of the common portion of the edge of the dark region 26a, multiplied by the display brightness of a single pixel in a predetermined color, ie, with
  • the sum of the compensation portions of the luminances of the adjacent pixels P 1 and P 2 is proportional to the ratio of the area of the dark region 26a
  • the brightness of the adjacent side pixels P 1 , P 2 can be determined by the following formula:
  • the brightness of the diagonal pixel P 3 of the dark region can be determined by the following formula:
  • L(P 1 ) and L(P 2 ) are the luminances of the determined neighboring pixels P 1 and P 2 , respectively;
  • L(P 3 ) is the brightness of the determined diagonal pixel P 3 ;
  • S is the area of a single pixel
  • S P1 and S P2 are the areas of the portions of the adjacent pixels P 1 and P 2 located in the display region 21, respectively;
  • a is the area of the dark region 26a; and
  • d 1 and d 2 are the adjacent pixels P 1 and P 2 , respectively.
  • L is a color in a predetermined region other than the display pixels neighboring a single pixel ( For example, the display brightness under all white display).
  • the base portion of the luminance of the adjacent side pixels P 1 , P 2 is equal to the ratio of the area of the portion of the corresponding adjacent side pixel located in the display area 21 to the area of the single pixel multiplied by the display brightness of the individual pixel under the predetermined color.
  • the compensation portion of the luminance of the adjacent side pixels P 1 , P 2 is equal to the ratio of the area of the dark area 26a to the area of the single pixel multiplied by the distance of the single adjacent side pixels P 1 , P 2 to the center of the corresponding dark area 26a and the adjacent side pixels
  • the ratio of the sum of the distances of P 1 , P 2 and the diagonal pixel P 3 to the center of the corresponding dark region 26a is then multiplied by the display luminance of a single pixel under a predetermined color, ie, with
  • the base portion of the luminance of the diagonal pixel P 3 is equal to the luminance L of the other pixels except the diagonal pixel and the adjacent pixel;
  • the compensation portion of the luminance of the diagonal pixel P 3 is equal to the area of the dark region 26a and the area of the single pixel Multiplying the ratio by L and subtracting the compensation portion of the brightness of the adjacent pixels P 1 , P 2 , ie,
  • the brightness of the adjacent side pixels P 1 , P 2 can be determined by the following formula:
  • the brightness of the diagonal pixel P 3 can be determined by the following formula:
  • L(P 1 ) and L(P 2 ) are the luminances of the determined neighboring pixels P 1 and P 2 , respectively;
  • L(P 3 ) is the brightness of the determined diagonal pixel P 3 ;
  • S is the area of a single pixel ;
  • S P1 and S P2 are the areas of the portions of the adjacent pixels P 1 , P 2 located in the display region 21;
  • a is the area of the dark region 26a; and
  • L is a single pixel other than the adjacent pixels in the display region; Display brightness under a predetermined color (for example, full white display).
  • the brightness of the adjacent pixels P 1 , P 2 of the dark region 26a has only the base portion, ie with Without the compensation portion, that is, the compensation portion is 0; the base portion of the luminance of the diagonal pixel P 3 of the dark region 26a is equal to the luminance L of the other pixels except the diagonal pixel and the adjacent pixel; the diagonal pixel P 3
  • the compensation portion of the brightness is equal to the ratio of the area of the dark area to the area of the individual pixels multiplied by L, ie
  • FIG. 4 illustrates a partial schematic view of another exemplary display panel in an embodiment of the present disclosure.
  • the display panel shown in FIG. 4 and the display panel shown in FIG. 2 may have the same pixel arrangement.
  • a pixel intersecting the boundary 23 in the pixel area 24 is taken as a boundary pixel having a first portion located inside the display area 21 and having a second portion located outside the display area 21, when the area of the first portion
  • the boundary pixel is set to a non-display pixel 27, and the dark area 26 further includes a first portion of the non-display pixel 27 that is located within the display area 21.
  • a predetermined threshold eg, a predetermined percentage
  • non-display pixel refers to a pixel that does not emit light when the display panel displays an image.
  • the boundary pixel satisfying the above predetermined condition to no light emission, the difference in luminance between the dark area and the peripheral pixels can be further reduced, thereby improving the phenomenon that the brightness of the edge of the display area is significantly uneven.
  • the predetermined threshold may be about 50%.
  • the dark area caused by the portion of the non-display pixel located in the display area can be compensated by the same method as the previously described embodiment, and will not be described herein.
  • the same neighboring pixel may be determined based on the area of the dark area having a smaller area in the two dark areas.
  • brightness In another embodiment, the brightness of the same neighboring pixel can be determined based on the average area of the two dark regions.
  • FIG. 26a and 26c show the dark areas in FIG. 26a and 26c have the same dark region adjacent edge pixel P 1.
  • the brightness of the adjacent side pixel P 1 can be calculated by taking a of the equations (1) - (6) as the average area of the dark area 26a and the dark area 26c.
  • Other embodiments are also possible.
  • the display panel further includes a thin film transistor for driving the pixels.
  • the brightness of adjacent pixels of the display panel can be controlled by changing the aspect ratio of the thin film transistor 51.
  • Fig. 5 exemplarily shows a pixel and a thin film transistor for driving the pixel to emit light.
  • the pixel may include a thin film transistor 51 and a pixel electrode 52 connected to the thin film transistor 51.
  • the specific type and structure of the thin film transistor are not limited, and may be appropriately selected according to actual needs.
  • the aspect ratio of a thin film transistor is a ratio that directs the width to length of the electrical channel.
  • FIG. 6 illustrates an exemplary flowchart of a method of determining a width to length ratio of a TFT for driving adjacent pixels in an embodiment of the present disclosure. As shown in FIG. 6, the method of determining the aspect ratio of the TFT for driving adjacent pixels includes steps 501-502.
  • a current for driving the TFTs of the respective adjacent pixels is determined based on the determined brightness of adjacent pixels adjacent to the dark region.
  • the brightness of the neighboring pixels may be determined in advance using any of the examples described above with respect to determining the brightness of neighboring pixels.
  • the driving current for driving the TFTs of the adjacent pixels may be determined according to the proportional relationship between the luminance of the pixel and the driving current of the TFT.
  • a width to length ratio of a TFT for driving adjacent pixels adjacent to the dark region is calculated based on the determined current for driving the TFTs of the adjacent pixels.
  • a display panel is also provided. As shown in FIGS. 2 and 4, the display panel includes a display area 21 and a non-display area 22, and a boundary 23 is formed between the display area 21 and the non-display area 22.
  • the boundary 23 passes through the pixel area 24 and the non-pixel area 25 of the display panel, and the portion of the non-pixel area 25 located inside the display area 21 constitutes a dark area 26 in the display area, and a thin film transistor for driving adjacent pixels adjacent to the dark area 26
  • the aspect ratio of 51 (for example, the thin film transistor shown in FIG. 5) is set to be different from the width to length ratio of the thin film transistor 51 of the pixels other than the adjacent pixels in the display region 21 so as to pass the brightness of the adjacent pixels.
  • the brightness of the dark area 26 is compensated.
  • the neighboring pixels may include at least two adjacent side pixels having a common edge with the dark area.
  • the neighboring pixels may further include diagonal pixels disposed diagonally to the dark areas.
  • a pixel intersecting a boundary in a pixel region is a boundary pixel, the boundary pixel having a first portion located within the display region and having a second portion located outside the display region, when the area of the first portion is equal to a single pixel
  • the boundary pixel is set as a non-display pixel, and the dark area further includes a first portion of the non-display pixel located within the display area.
  • Embodiments of the present disclosure also provide a display device.
  • the display device can include a display panel as described herein in relation to any of the embodiments of the display panel.
  • the foregoing description of the embodiments has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the application.
  • the various elements or features of a particular embodiment are generally not limited to the specific embodiments, but, where appropriate, these elements and features are interchangeable and can be used in the selected embodiments, even if not specifically illustrated or described. . It can also be changed in many ways. Such changes are not to be regarded as a departure from the present application, and all such modifications are included within the scope of the present application.

Abstract

一种用于补偿显示面板的亮度的方法、显示面板以及显示装置。显示面板包括：显示区域（21）和非显示区域（22），显示区域（21）和非显示区域（22）之间具有边界（23），边界（23）经过显示面板的像素区域（24）和无像素区域（25），无像素区域（25）位于显示区域（21）内的部分构成显示区域（21）内的暗区（26），用于补偿显示面板的亮度的方法包括：基于暗区（26）的面积，确定像素区域（24）中的显示像素中的与暗区（26）邻近的邻近像素的亮度，以便通过邻近像素的亮度来补偿暗区（26）的亮度（301）。

Description

用于补偿显示面板的亮度的方法、显示面板以及显示装置
相关申请的交叉引用
本申请要求于2017年05月26日递交的中国专利申请第201710384365.2号的优先权和权益，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及显示技术领域，特别地涉及一种用于补偿显示面板的亮度的方法、显示面板以及显示装置。
背景技术
近年来，智能穿戴设备(例如智能手表或头戴式显示装置)已经得到广泛的应用。为了美观和人体工程学的考虑，智能穿戴设备的显示面板通常采用例如圆形或椭圆形的非矩形设计。
发明内容
本公开的实施例提供了一种用于补偿显示面板的亮度的方法及显示显示面板。
在本公开的一个方面，提供一种用于补偿显示面板的亮度的方法，所述显示面板可以包括：显示区域和非显示区域，所述显示区域和所述非显示区域之间具有边界，所述边界经过所述显示面板的像素区域和无像素区域，所述无像素区域位于所述显示区域内的部分构成所述显示区域内的暗区，所述方法可以包括：基于所述暗区的面积，确定所述像素区域中的显示像素中的与所述暗区邻近的邻近像素的亮度，以便通过所述邻近像素的亮度来补偿所述暗区的亮度。
在本公开的实施例中，确定的所述邻近像素的亮度可以包括基础部分和用于补偿所述暗区的亮度的补偿部分，所述基础部分与相应邻近像素位 于所述显示区域内的部分的面积与单个像素的面积的比值成比例；对于每个暗区，所有邻近像素的补偿部分之和与所述暗区的面积与单个像素的面积的比值成比例。
在本公开的实施例中，所述邻近像素可以包括与所述暗区具有共同边缘的至少两个邻边像素。
在本公开的实施例中，可以通过以下公式来确定所述邻边像素的亮度：
Figure PCTCN2018071584-appb-000001
其中，
i＝1，…，n，n为大于等于2的正整数；L(P i)为第i个邻边像素的亮度；S为单个像素的面积；S Pi为第i个邻边像素的位于所述显示区域内的部分的面积；a为所述暗区的面积；d i为第i个邻边像素的中心到所述暗区的中心的距离；以及L为所述显示区域中的除所述邻近像素之外的单个像素在预定颜色下的显示亮度。
在本公开的实施例中，可以通过以下公式来确定所述邻边像素的亮度：
Figure PCTCN2018071584-appb-000002
其中，i＝1，…，n，n为大于等于2的正整数；L(P i)为第i个邻边像素的亮度；S为单个像素的面积；S Pi为第i个邻边像素的位于所述显示区域内的部分的面积；a为所述暗区的面积；b i为第i个邻边像素的边缘与所述暗区的边缘的公共部分的长度；以及L为所述显示区域中的除所述邻近像素之外的单个像素在预定颜色下的显示亮度。
在本公开的实施例中，所述邻近像素可以包括与所述暗区具有共同边缘的至少两个邻边像素以及与所述暗区对角设置的对角像素。
在本公开的实施例中，可以通过以下公式来确定所述邻边像素的亮度：
Figure PCTCN2018071584-appb-000003
可以通过以下公式来确定所述对角像素的亮度：
Figure PCTCN2018071584-appb-000004
其中，n为大于等于2的正整数，i＝1，…，n；L(P i)为第i个邻边像素的亮度；L(P 3)为所述对角像素的亮度；S为单个像素的面积；S Pi为第i个邻边像素的位于所述显示区域内的部分的面积；a为所述暗区的面积；d i为第i个邻边像素的中心到所述暗区的中心的距离；d为所述对角像素的中心到所述暗区的中心的距离；以及L为所述显示区域中的除所述邻近像素之外的单个像素在预定颜色下的显示亮度。
在本公开的实施例中，可以通过以下公式来确定所述邻边像素的亮度：
Figure PCTCN2018071584-appb-000005
可以通过以下等式确定所述邻角像素的亮度：
Figure PCTCN2018071584-appb-000006
其中，i为大于等于1的整数；L(P i)为第i个邻边像素的亮度；L(P 3)为所述对角像素的亮度；S为单个像素的面积；S Pi为第i个邻边像素的位于所述显示区域内的部分的面积；a为所述暗区的面积；以及L为所述显示区域中的除所述邻近像素之外的单个像素在预定颜色下的显示亮度。
在本公开的实施例中，所述像素区域中与所述边界相交的像素为边界像素，所述边界像素可以具有位于所述显示区域内的第一部分和具有位于所述显示区域外的第二部分，当所述第一部分的面积与单个像素的面积的比率小于预定阈值时，将所述边界像素设置为非显示像素，所述暗区还可以包括所述边界像素的位于所述显示区域内的所述第一部分。
在本公开的实施例中，在同一邻近像素同时与不同暗区具有公共边的情况下，可以基于所述不同暗区中的具有最小面积的暗区的面积，确定所述像素区域中的显示像素中的与所述暗区邻近的邻近像素的亮度。
在本公开的实施例中，在同一邻近像素同时与不同暗区具有公共边的情况下，可以基于所述不同暗区的平均面积，确定所述像素区域中的显示像素中的与所述暗区邻近的邻近像素的亮度。
在本公开的实施例中，所述预定阈值为50％。
在本公开的实施例中，所述显示面板还可以包括用于驱动像素的薄膜晶体管，其中用于驱动所述邻近像素的薄膜晶体管的宽长比可以通过以下步骤来确定：基于确定的与所述暗区邻近的邻近像素的亮度，确定用于驱动相应邻近像素的薄膜晶体管的电流；以及基于所述电流确定所述薄膜晶体管的宽长比。
在本公开的实施例中，所述显示区域可以具有圆形或椭圆形形状。
在本公开的另一方面，提供一种显示面板。该显示面板可以包括：显示区域和非显示区域，所述显示区域和所述非显示区域之间具有边界，所述边界经过所述显示面板的像素区域和无像素区域，所述无像素区域位于所述显示区域内的部分构成所述显示区域内的暗区，用于驱动与所述暗区邻近的邻近像素的薄膜晶体管的宽长比被设置为与所述显示区域中的用于驱动除所述邻近像素之外其他像素的薄膜晶体管的宽长比不同，以便通过所述邻近像素的亮度来补偿所述暗区的亮度。
在本公开的实施例中，所述邻近像素可以包括与所述暗区具有共同边缘的至少两个邻边像素。
在本公开的实施例中，所述邻近像素可以包括与所述暗区具有共同边缘的至少两个邻边像素和与所述暗区对角设置的对角像素。
在本公开的实施例中，所述像素区域中与所述边界相交的像素为边界像素，所述边界像素可以具有位于所述显示区域内的第一部分和具有位于所述显示区域外的第二部分，当所述第一部分的面积与单个像素的面积的比率小于预定阈值时，将所述边界像素设置为非显示像素，所述暗区还可以包括所述非显示像素的位于所述显示区域内的所述第一部分。
在本公开的又一方面，提供一种显示装置。该显示装置可以包括上述显示面板。
适应性的进一步的方面和范围从本文中提供的描述变得明显。应当理解，本申请的各个方面可以单独或者与一个或多个其他方面组合实施。还应当理解，本文中的描述和特定实施例旨在仅说明的目的并不旨在限制本申请的范围。
附图说明
本文中描述的附图用于仅对所选择的实施例的说明的目的，并不是所有可能的实施方式，并且不旨在限制本申请的范围，其中：
图1示出根据本公开的实施例的示例性显示面板的示意图；
图2示出图1中虚线内区域C的放大图；
图3示出本公开的实施例中确定用于驱动邻近像素的TFT的宽长比的方法的示例性流程图；
图4示出根据本公开的实施例的另一种示例性显示面板的局部示意图；
图5示例性地示出了一个像素和用于驱动该像素发光的薄膜晶体管；以及
图6示出根据本公开的实施例的用于补偿显示面板的亮度的方法的示例性流程图。
贯穿这些附图的各个视图，相应的参考编号指示相应的部件或特征。
具体实施方式
现将参照附图更全面地描述示例性的实施例。
值得注意的是，以下附图和示例并不意味着限制本公开的范围。在使用已知的组件(或方法或过程)可以部分或全部实现本公开的特定元件的情况下，将仅描述对理解本公开所需要的这种已知组件(或方法或过程)的那些部分，并且这种已知组件的其它部分的详细描述将被省略以便不会混淆本公开。进一步地，各种实施例通过说明的方式包含与在此涉及的组件等同的现在和未来已知的等同物。
此外，本公开中描绘的流程图仅仅是一个例子。在不脱离本公开精神的情况下，可以存在该流程图或其中描述的步骤的很多变型。例如，所述步骤可以以不同的顺序进行，或者可以添加、删除或者修改步骤。这些变型都被认为是所要求保护的方面的一部分。
除非上下文中另外明确地指出，否则在本文和所附权利要求中所使用的词语的单数形式包括复数，反之亦然。因而，当提及单数时，通常包括相应术语的复数。相似地，措辞“包含”和“包括”将解释为包含在内而不是独占性地。
在非矩形(例如圆形、椭圆形)显示面板中，各个像素都采用矩形设计。当这种矩形的像素被布置在非矩形显示面板中时，将导致位于显示面板边缘的像素与显示面板的边缘不能完全吻合。也就是说，在显示面板的边缘存在不能布置像素的空白区域，从而在显示面板的边缘附近形成具有暗区的阶梯结构。结果是，虽然这种显示面板在外观上表现为圆形，但是由于阶梯结构中空白区域不能发光，在显示时，用户能够看到这种由阶梯结构导致的亮度差异，从而影响显示效果。
在本文描述的实施例中，以圆形显示面板为例对本公开的各种实施例进行解释和说明。然而，应当理解，本公开的实施例也适于其他形状的非矩形显示面板，例如，椭圆形、三角形、半圆形等。
图1示出在本公开的实施例中的示例性显示面板的示意图；图2示出图1中虚线内区域C的放大图。如图1和2所示，显示面板包括显示区域21和非显示区域22，显示区域21和非显示区域22之间具有边界23，该边界23穿过显示面板的像素区域24(即，布置有像素的区域)和无像素区域25(即，没有布置像素的区域)。无像素区域25位于显示区域21内部的部分构成显示区域21内的暗区26。
作为示例，对于智能手表而言，显示区域21可以为智能手表的表盘所在的区域，非显示区域22可以为智能手表的帽盖所在的区域。在本公开的实施例中，显示区域21和非显示区域22被边界23分开。
图3示出根据本公开的实施例的用于补偿显示面板的亮度的方法的示例性流程图。如图3所示，用于补偿显示面板的亮度的方法包括步骤301。在步骤301，基于暗区的面积，确定像素区域24中的显示像素中的与暗区邻近的邻近像素的亮度，以便通过邻近像素的亮度来补偿暗区的亮度。
在本公开的实施例中，“像素区域中的显示像素”是指在显示面板显示 图像时发光的像素。
根据本公开的实施例提供的方法，通过基于暗区的面积确定的与暗区邻近的邻近像素的亮度来补偿暗区的亮度，能够减小暗区的亮度与邻近像素的亮度的差异，使得这种差异对于用户而言肉眼不明显。
在本公开的实施例中，邻近像素可以包括与暗区具有公共边缘的邻边像素以及与暗区对角设置的对角像素。如在图2中示出的，暗区26a具有两个邻边像素P 1、P 2和一个对角像素P 3。依赖于显示面板中像素的布置，暗区26还可以具有两个以上的邻边像素，例如，图2中示出的暗区26b具有3个邻边像素。为了简化描述并且为了不混淆本公开，本文中仅详细描述暗区26具有两个邻边像素P 1、P 2的实施例。应当理解，对于具有两个以上邻边像素的实施例同样适于本公开。
在本公开的一个示例性实施例中，可以将在步骤301中确定的邻近像素的亮度分成两部分：用于邻近像素正常显示的基础部分；以及用于补偿暗区的亮度的补偿部分。基础部分与每个暗区的邻近像素位于显示区域内的部分的面积和单个像素的面积的比值成比例；以及对于每个暗区，所有邻近像素的补偿部分之和与暗区的面积和单个像素的面积的比值成比例。
需要说明的是，在本公开的实施例中，仅仅是为了便于描述，而将邻近像素的亮度划分为基础部分和补偿部分。在实际中，邻近像素的亮度是作为一个整体而起作用的，一方面用于邻近像素自身发光的需要，另一方面用于提高邻近的暗区的亮度。
以下结合附图2以暗区26a为例详细描述用于确定暗区的邻边像素和对角像素的亮度的几个示例。对于其他暗区可以采用类似的方式来确定暗区的邻近像素的亮度。
示例1
在该示例中，通过调整暗区26a的邻边像素P 1、P 2的亮度来实现对暗区26a的亮度的补偿，而暗区26a的对角像素P 3可以具有与除邻边像素之外的其他像素相同或相近的亮度。
具体地，可以通过以下公式来确定邻边像素P 1、P 2的亮度：
Figure PCTCN2018071584-appb-000007
Figure PCTCN2018071584-appb-000008
其中，L(P 1)和L(P 2)分别是确定的邻边像素P 1、P 2的亮度；S为单个像素的面积；S P1和S P2分别是邻边像素P 1、P 2的位于显示区域内的部分的面积；a是暗区26a的面积；d 1和d 2分别是邻边像素P 1、P 2的中心到相应暗区26a的中心的距离；以及L为显示区域中的除邻近像素之外的单个像素在预定颜色(例如全白色显示)下的显示亮度。
在该示例中，邻边像素P 1、P 2的亮度的基础部分等于相应邻边像素位于显示区域内的部分的面积与单个像素的面积的比值乘以单个像素在预定颜色下的显示亮度，即，
Figure PCTCN2018071584-appb-000009
和
Figure PCTCN2018071584-appb-000010
邻边像素P 1、P 2的亮度的补偿部分等于暗区26a的面积与单个像素的面积的比值乘以单个邻边像素到暗区26a的中心的距离与邻边像素P 1、P 2到暗区26a的中心的距离之和的比值，然后再乘以单个像素在预定颜色下的显示亮度，即，
Figure PCTCN2018071584-appb-000011
和
Figure PCTCN2018071584-appb-000012
从公式(1)和(2)可知，邻边像素P 1、P 2的亮度的补偿部分之和与暗区的面积和单个像素的面积的比值成比例，即等于
Figure PCTCN2018071584-appb-000013
当存在两个以上的邻边像素时，上述公式(1)和(2)可以被进一步改写为：
Figure PCTCN2018071584-appb-000014
其中，i＝1，…，n，n为大于等于2的正整数。
示例2
在该示例中，与示例1类似，通过调整暗区26a的邻边像素P 1、P 2的亮度来实现对暗区26a的亮度的补偿，而暗区26a的对角像素P 3可以具有与其他像素相同或相近的亮度。
具体地，可以通过以下公式来确定邻边像素P 1、P 2的亮度：
Figure PCTCN2018071584-appb-000015
Figure PCTCN2018071584-appb-000016
其中，L(P 1)和L(P 2)分别是确定的邻边像素P 1、P 2的亮度；S为单个像素的面积；S P1和S P2分别是邻边像素P 1、P 2的位于显示区域内的部分的面积；a是暗区26a的面积；b 1和b 2分别是邻边像素P 1、P 2的边缘与相应暗区26a的边缘的公共部分的长度；以及L为显示区域中的除邻近像素之外的单个像素在预定颜色(例如全白色显示)下的显示亮度。
在该示例中，邻边像素P 1、P 2的亮度的基础部分等于相应邻边像素位于显示区域内的部分的面积与单个像素的面积的比值乘以单个像素在预定颜色下的显示亮度，即，
Figure PCTCN2018071584-appb-000017
和
Figure PCTCN2018071584-appb-000018
邻边像素P 1、P 2的亮度的补偿部分等于暗区26a的面积与单个像素的面积的比值乘以单个邻边像素的边缘与暗区26a的边缘的公共部分的长度与邻边像素P 1、P 2的边缘与暗区26a的边缘的公共部分的长度之和的比值，再乘以单个像素在预定颜色下的显示亮度，即，
Figure PCTCN2018071584-appb-000019
和
Figure PCTCN2018071584-appb-000020
从公式(3)和(4)可知，邻边像素P 1、P 2的亮度的补偿部分之和与暗区26a的面积和单个像素的面积的比值成比例，即等于
Figure PCTCN2018071584-appb-000021
当存在两个以上的邻边像素时，上述公式(3)和(4)可以被进一步改写为：
Figure PCTCN2018071584-appb-000022
其中，i＝1，…，n，n为大于等于2的正整数。
示例3
在该示例中，通过调整暗区26a的邻边像素P 1、P 2和一个对角像素P 3的亮度来实现对暗区26a的亮度的补偿。
具体地，可以通过以下公式来确定邻边像素P 1、P 2的亮度：
Figure PCTCN2018071584-appb-000023
Figure PCTCN2018071584-appb-000024
具体地，可以通过以下公式来确定暗区的对角像素P 3的亮度：
Figure PCTCN2018071584-appb-000025
其中，L(P 1)和L(P 2)分别是确定的邻边像素P 1、P 2的亮度；L(P 3)为确定的对角像素P 3的亮度；S为单个像素的面积；S P1和S P2分别是邻边像素P 1、P 2的位于显示区域21内的部分的面积；a是暗区26a的面积；d 1和d 2分别是邻边像素P 1、P 2的中心到相应暗区26a的中心的距离；d为对角像素P 3的中心到相应暗区26a的中心的距离；以及L为显示区域中的除邻近像素之外的单个像素在预定颜色(例如全白色显示)下的显示亮度。
在该示例中，邻边像素P 1、P 2的亮度的基础部分等于相应邻边像素位于显示区域21内的部分的面积与单个像素的面积的比值乘以单个像素在预定颜色下的显示亮度，即
Figure PCTCN2018071584-appb-000026
和
Figure PCTCN2018071584-appb-000027
邻边像素P 1、P 2的亮度的补偿部分等于暗区26a的面积与单个像素的面积的比值乘以单个邻边像素P 1、P 2到相应暗区26a的中心的距离与邻边像素P 1、P 2和对角像素P 3到相应暗区26a的中心的距离之和的比值然后再乘以单个像素在预定颜色下的显示亮度，即，
Figure PCTCN2018071584-appb-000028
和
Figure PCTCN2018071584-appb-000029
对角像素P 3的亮度的基础部分等于除对角像素和邻边像素之外的其他单个像素的亮度L；对角像素P 3的亮度的补偿部分等于暗区26a的面积和单个像素的面积的比值乘以L再减去邻边像素P 1、P 2的亮度的补偿部分，即，
Figure PCTCN2018071584-appb-000030
从公式(5)-(7)可知，邻边像素P 1、P 2的亮度的补偿部分以及对角像素P 3的补偿部分之和与暗区的面积和单个像素的面积的比值成比例，即等于
Figure PCTCN2018071584-appb-000031
当存在两个以上的邻边像素时，上述公式(5)和(6)可以被进一步改写为：
Figure PCTCN2018071584-appb-000032
上述公式(7)可以被进一步改写为：
Figure PCTCN2018071584-appb-000033
其中，i＝1，…，n，n为大于等于2的正整数。
示例4
在该示例中，通过调整暗区26a的对角像素P 3的亮度来实现对暗区26a的亮度的补偿。
具体地，可以通过以下公式来确定邻边像素P 1、P 2的亮度：
Figure PCTCN2018071584-appb-000034
Figure PCTCN2018071584-appb-000035
可以通过以下公式来确定对角像素P 3的亮度：
Figure PCTCN2018071584-appb-000036
其中，L(P 1)和L(P 2)分别是确定的邻边像素P 1、P 2的亮度；L(P 3)为确定的对角像素P 3的亮度；S为单个像素的面积；S P1和S P2分别是邻边像素P 1、P 2的位于显示区域21内的部分的面积；a是暗区26a的面积；以及L为显示区域中的除邻近像素之外的单个像素在预定颜色(例如全白色显示)下的显示亮度。
在该示例中，暗区26a的邻边像素P 1、P 2的亮度仅具有基础部分即
Figure PCTCN2018071584-appb-000037
和
Figure PCTCN2018071584-appb-000038
而不具有补偿部分，即补偿部分为0；暗区26a的对角像素P 3的亮度的基础部分等于除对角像素和邻边像素之外的其他单个像素的亮度L；对角像素P 3的亮度的补偿部分等于暗区的面积和单个像素的面积的比值乘以L，即
Figure PCTCN2018071584-appb-000039
当存在两个以上的邻边像素时，上述公式(8)和(9)可以被进一步改写为：
Figure PCTCN2018071584-appb-000040
其中，i＝1，…，n，n为大于等于2的正整数。
图4示出在本公开的实施例中的另一种示例性显示面板的局部示意图。图4所示的显示面板与图2所示的显示面板可以具有相同的像素布置。然而，在图4中，将像素区域24中与边界23相交的像素作为边界像素，边界像素具有位于显示区域21内部的第一部分和具有位于显示区域21外部的第二部分，当第一部分的面积与单个像素的面积的比率小于预定阈值(例如预定百分比)时，将该边界像素设置为非显示像素27，暗区26还包括该非显示像素27的位于显示区域21内的第一部分。
在该实施例中，“非显示像素”是指在显示面板显示图像时不发光的像素。
在该实施例中，通过将满足上述预定条件的边界像素设置为不发光，可以进一步减小暗区与周边像素的亮度差异，从而改善显示区域的边缘的亮度明显不均匀的现象。
在本公开的一个实施例中，预定阈值可以为约50％。
对于由非显示像素的位于显示区域内的部分造成的暗区，可以采用与前面描述的实施例相同的方法来补偿，在此不再赘述。
在同一邻近像素特别是邻边像素同时与不同暗区具有公共边的情况下，在一个实施例中，可以基于两个暗区中的面积较小的暗区的面积，确定该同一邻近像素的亮度。在另一个实施例中，可以基于两个暗区的平均面积确定该同一邻近像素的亮度。
如图4中示出的，暗区26a和暗区26c具有相同的邻边像素P 1。在这种情况下，可以通过使公式(1)-(6)中的a取值为暗区26a和暗区26c中面积较小的暗区(例如，在图4中的暗区26a)的面积来计算该邻边像素P 1的亮度。可替代地，可以通过使公式(1)-(6)中的a取值为暗区26a和暗区26c的平均面积来计算该邻边像素P 1的亮度。其他实施例也是可行的。
在本公开的实施例中，显示面板还包括用于驱动像素的薄膜晶体管。在示例性的实施例中，可以通过改变薄膜晶体管51的宽长比来控制显示面 板的邻近像素的亮度。
图5示例性示出一个像素和用于驱动该像素发光的薄膜晶体管。如图5所示，该像素可以包括薄膜晶体管51和与薄膜晶体管51连接的像素电极52。然而应当理解，在本公开的实施例中，对薄膜晶体管的具体类型和结构没有限定，可以根据实际需要适宜地选择。另外，如本领域技术人员已知的，“薄膜晶体管的宽长比”是指导电沟道的宽度与长度的比率。
图6示出本公开实施例中确定用于驱动邻近像素的TFT的宽长比的方法的示例性流程图。如图6所示，确定用于驱动邻近像素的TFT的宽长比的方法包括步骤501-502。
在步骤501，基于确定的与暗区邻近的邻近像素的亮度，确定用于驱动相应邻近像素的TFT的电流。
在该步骤中，可以预先采用上文详细描述的关于确定邻近像素的亮度的任一示例来确定邻近像素的亮度。在具体的实施例中，可以根据像素的亮度与TFT的驱动电流的比例关系，确定用于驱动邻近像素的TFT的驱动电流。该比例关系为L p＝KI，其中，L p为与相应暗区邻近的邻近像素的亮度；K为比例系数，该比例系数可以凭经验人工确定或者通过实验确定；I为驱动电流。
在步骤502，根据确定的用于驱动邻近像素的TFT的电流，计算用于驱动与暗区相邻的邻近像素的TFT的宽长比。
在该步骤中，可以基于电流公式
Figure PCTCN2018071584-appb-000041
计算用于驱动邻近像素的TFT的宽长比，其中，Cox为单位面积栅氧化层电容；W/L为TFT的宽长比；V gs为TFT的栅源电压；V th为TFT的阈值电压。
在本公开的另一方面，还提供一种显示面板。如图2和图4所示，显示面板包括：显示区域21和非显示区域22，显示区域21和非显示区域22之间具有边界23。该边界23经过显示面板的像素区域24和无像素区域25，无像素区域25位于显示区域21内部的部分构成显示区域内的暗区26，用于驱动与暗区26邻近的邻近像素的薄膜晶体管51(例如，图5中示出的薄膜晶体管)的宽长比被设置为与显示区域21中的除邻近像素之外其他像素的薄膜晶体管51的宽长比不同，以便通过邻近像素的亮度来补偿所述暗 区26的亮度。
在这种配置中，通过改变薄膜晶体管的宽长比使得与相应暗区邻近的邻近像素的亮度与显示区域中其他像素的亮度不同，这能够减小暗区中的亮度与邻近像素的亮度的差异，以使这种差异对于用户而言肉眼不明显。因此，可以改善显示区域的边缘的亮度明显不均匀的现象。
在本公开的实施例中，邻近像素可以包括与暗区具有共同边缘的至少两个邻边像素。
在本公开的实施例中，邻近像素还可以包括与暗区对角设置的对角像素。
在本公开的实施例中，像素区域中与边界相交的像素为边界像素，边界像素具有位于显示区域内的第一部分和具有位于显示区域外的第二部分，当第一部分的面积与单个像素的面积的比率小于预定阈值时，将边界像素设置为非显示像素，暗区还包括非显示像素的位于显示区域内的第一部分。
本公开的实施例还提供一种显示装置。该显示装置可以包括本文中涉及显示面板的实施例中任一实施例所描述的显示面板。因此，对于该显示装置的可选实施例，可以参考本文描述的显示面板的实施例。以上为了说明和描述的目的提供了实施例的前述描述。其并不旨在是穷举的或者限制本申请。特定实施例的各个元件或特征通常不限于特定的实施例，但是，在合适的情况下，这些元件和特征是可互换的并且可用在所选择的实施例中，即使没有具体示出或描述。同样也可以以许多方式来改变。这种改变不能被认为脱离了本申请，并且所有这些修改都包含在本申请的范围内。

Claims (19)

  1. 一种用于补偿显示面板的亮度的方法，其中，所述显示面板包括：
    显示区域和非显示区域，所述显示区域和所述非显示区域之间具有边界，所述边界经过所述显示面板的像素区域和无像素区域，所述无像素区域位于所述显示区域内的部分构成所述显示区域内的暗区，所述方法包括：
    基于所述暗区的面积，确定所述像素区域中的显示像素中的与所述暗区邻近的邻近像素的亮度，以便通过所述邻近像素的亮度来补偿所述暗区的亮度。
  2. 根据权利要求1所述的方法，其中，确定的所述邻近像素的亮度包括基础部分和用于补偿所述暗区的亮度的补偿部分，所述基础部分与相应邻近像素位于所述显示区域内的部分的面积与单个像素的面积的比值成比例；对于每个暗区，所有邻近像素的补偿部分之和与所述暗区的面积与单个像素的面积的比值成比例。
  3. 根据权利要求2所述的方法，其中，所述邻近像素包括与所述暗区具有共同边缘的至少两个邻边像素。
  4. 根据权利要求3所述的方法，其中，
    通过以下公式来确定所述邻边像素的亮度：
    Figure PCTCN2018071584-appb-100001
    其中，
    i＝1，…，n，n为大于等于2的正整数；
    L(P i)为第i个邻边像素的亮度；
    S为单个像素的面积；
    S Pi为第i个邻边像素的位于所述显示区域内的部分的面积；
    a为所述暗区的面积；
    d i为第i个邻边像素的中心到所述暗区的中心的距离；以及
    L为所述显示区域中的除所述邻近像素之外的单个像素在预定颜色下的显示亮度。
  5. 根据权利要求3所述的方法，其中，
    通过以下公式来确定所述邻边像素的亮度：
    Figure PCTCN2018071584-appb-100002
    其中，
    i＝1，…，n，n为大于等于2的正整数；
    L(P i)为第i个邻边像素的亮度；
    S为单个像素的面积；
    S Pi为第i个邻边像素的位于所述显示区域内的部分的面积；
    a为所述暗区的面积；
    b i为第i个邻边像素的边缘与所述暗区的边缘的公共部分的长度；以及
    L为所述显示区域中的除所述邻近像素之外的单个像素在预定颜色下的显示亮度。
  6. 根据权利要求2所述的方法，其中，
    所述邻近像素包括与所述暗区具有共同边缘的至少两个邻边像素以及与所述暗区对角设置的对角像素。
  7. 根据权利要求6所述的方法，其中，
    通过以下公式来确定所述邻边像素的亮度：
    Figure PCTCN2018071584-appb-100003
    通过以下公式来确定所述对角像素的亮度：
    Figure PCTCN2018071584-appb-100004
    其中，
    n为大于等于2的正整数，i＝1，…，n；
    L(P i)为第i个邻边像素的亮度；
    L(P 3)为所述对角像素的亮度；
    S为单个像素的面积；
    S Pi为第i个邻边像素的位于所述显示区域内的部分的面积；
    a为所述暗区的面积；
    d i为第i个邻边像素的中心到所述暗区的中心的距离；
    d为所述对角像素的中心到所述暗区的中心的距离；以及
    L为所述显示区域中的除所述邻近像素之外的单个像素在预定颜色下的显示亮度。
  8. 根据权利要求6所述的方法，其中，
    通过以下公式来确定所述邻边像素的亮度：
    Figure PCTCN2018071584-appb-100005
    通过以下等式确定所述邻角像素的亮度：
    Figure PCTCN2018071584-appb-100006
    其中，
    i为大于等于1的整数；
    L(P i)为第i个邻边像素的亮度；
    L(P 3)为所述对角像素的亮度；
    S为单个像素的面积；
    S Pi为第i个邻边像素的位于所述显示区域内的部分的面积；
    a为所述暗区的面积；以及
    L为所述显示区域中的除所述邻近像素之外的单个像素在预定颜色下的显示亮度。
  9. 根据权利要求1-8中任一项所述的方法，其中，
    所述像素区域中与所述边界相交的像素为边界像素，所述边界像素具有位于所述显示区域内的第一部分和具有位于所述显示区域外的第二部分，当所述第一部分的面积与单个像素的面积的比率小于预定阈值时，将所述边界像素设置为非显示像素，所述暗区还包括所述边界像素的位于所述显示区域内的所述第一部分。
  10. 根据权利要求9所述的方法，其中，在同一邻近像素同时与不同 暗区具有公共边的情况下，
    基于所述不同暗区中的具有最小面积的暗区的面积，确定所述像素区域中的显示像素中的与所述暗区邻近的邻近像素的亮度。
  11. 根据权利要求9所述的方法，其中，在同一邻近像素同时与不同暗区具有公共边的情况下，
    基于所述不同暗区的平均面积，确定所述像素区域中的显示像素中的与所述暗区邻近的邻近像素的亮度。
  12. 根据权利要求9所述的方法，其中，所述预定阈值约为50％。
  13. 根据权利要求1所述的方法，其中，所述显示面板还包括用于驱动像素的薄膜晶体管，其中用于驱动所述邻近像素的薄膜晶体管的宽长比通过以下步骤来确定：
    基于确定的与所述暗区邻近的邻近像素的亮度，确定用于驱动相应邻近像素的薄膜晶体管的电流；以及
    基于所述电流确定所述薄膜晶体管的宽长比。
  14. 根据权利要求1所述的方法，其中，所述显示区域具有圆形或椭圆形形状。
  15. 一种显示面板包括：显示区域和非显示区域，所述显示区域和所述非显示区域之间具有边界，所述边界经过所述显示面板的像素区域和无像素区域，所述无像素区域位于所述显示区域内的部分构成所述显示区域内的暗区，用于驱动与所述暗区邻近的邻近像素的薄膜晶体管的宽长比被设置为与所述显示区域中的用于驱动除所述邻近像素之外其他像素的薄膜晶体管的宽长比不同，以便通过所述邻近像素的亮度来补偿所述暗区的亮度。
  16. 根据权利要求15所述的显示面板，其中，所述邻近像素包括与所述暗区具有共同边缘的至少两个邻边像素。
  17. 根据权利要求15所述的显示面板，其中，所述邻近像素包括与所述暗区具有共同边缘的至少两个邻边像素和与所述暗区对角设置的对角像素。
  18. 根据权利要求15至17中任一项所述的显示面板，其中，所述像素区域中与所述边界相交的像素为边界像素，所述边界像素具有位于所述显示区域内的第一部分和具有位于所述显示区域外的第二部分，当所述第一部分的面积与单个像素的面积的比率小于预定阈值时，将所述边界像素设置为非显示像素，所述暗区还包括所述非显示像素的位于所述显示区域内的所述第一部分。
  19. 一种显示装置包括如权利要求15-18任意一项所述的显示面板。
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