CN113707088B - Brightness compensation method and device and display device - Google Patents

Brightness compensation method and device and display device Download PDF

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Publication number
CN113707088B
CN113707088B CN202110990788.5A CN202110990788A CN113707088B CN 113707088 B CN113707088 B CN 113707088B CN 202110990788 A CN202110990788 A CN 202110990788A CN 113707088 B CN113707088 B CN 113707088B
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display
curved surface
compensation
area
sub
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CN113707088A (en
Inventor
肖灿
梁恒镇
刘练彬
牛文骁
朱潇龙
李泽文
邓英俊
李仁东
马子龙
张羽
胡宏锦
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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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
    • 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]
    • G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G3/03—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

A method of brightness compensation, comprising: determining a first compensation parameter of a plane area of a curved surface display panel; determining a second compensation parameter of the curved surface area of the curved surface display panel according to the first compensation parameter and the compensation coefficient of the curved surface area; and performing brightness compensation on the plane area by using the first compensation parameter, and performing brightness compensation on the curved surface area by using the second compensation parameter. Wherein, the compensation coefficient is determined according to the bending angle of the curved surface area.

Description

Brightness compensation method and device and display device
Technical Field
The present disclosure relates to but not limited to the field of display technologies, and in particular, to a method and an apparatus for luminance compensation and a display apparatus.
Background
In the process of manufacturing the display panel, the display unevenness of the display panel is easily caused by factors such as process level, raw material purity and the like, and may also be referred to as Mura phenomenon. In order to improve the Mura phenomenon, the display panel may be display compensated by using a Demura technique.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the disclosure provides a brightness compensation method and device and a display device.
In one aspect, an embodiment of the present disclosure provides a brightness compensation method applied to a curved display panel, where a display area of the curved display panel includes a planar area and at least one curved area. The brightness compensation method includes: determining a first compensation parameter of a plane area of a curved surface display panel; determining a second compensation parameter of the curved surface area of the curved surface display panel according to the first compensation parameter and the compensation coefficient of the curved surface area; and performing brightness compensation on the plane area by using the first compensation parameter, and performing brightness compensation on the curved surface area by using the second compensation parameter. Wherein, the compensation coefficient is determined according to the bending angle of the curved surface area.
In some exemplary embodiments, the compensation factor is sin θ, θ being a bending angle of the curved surface region.
In some exemplary embodiments, the curved surface region is located on at least one side of the planar region in a first direction; the display area is divided into a plurality of sub-display areas arranged along a second direction; the at least one sub-display area comprises at least one first display block and at least one second display block which are arranged along the first direction, the first display block is located in the plane area, and the second display block is located in the curved surface area; the first direction intersects the second direction. The determining a first compensation parameter of a planar area of the curved display panel includes: for any sub-display area, determining a first compensation parameter of at least one first display block in the sub-display area. The determining a second compensation parameter of the curved surface area of the curved surface display panel according to the first compensation parameter and the compensation coefficient includes: and aiming at any sub-display area, determining a second compensation parameter of a second display block of the sub-display area according to the first compensation parameter of at least one first display block of the sub-display area and the compensation coefficient of the curved surface area.
In some exemplary embodiments, the determining, for any one of the sub-display regions, a second compensation parameter of a second display block of the sub-display region according to a first compensation parameter of at least one first display block of the sub-display region and a compensation coefficient of a curved surface region includes: aiming at any sub-display area, determining an average compensation parameter of a first display block of the sub-display area according to first compensation parameters of a plurality of first display blocks of the sub-display area; and determining a second compensation parameter of a second display block of the sub-display area according to the product of the average compensation parameter of the first display block of the sub-display area and the compensation coefficient of the curved surface area.
In some exemplary embodiments, θ takes a value greater than 0 and less than 90 degrees.
In another aspect, an embodiment of the present disclosure provides a luminance compensation apparatus, including: the device comprises a first processing module, a second processing module and a compensation module. The first processing module is configured to determine a first compensation parameter of a planar area of the curved display panel. The second processing module is configured to determine a second compensation parameter of the curved surface area of the curved surface display panel according to the first compensation parameter and a compensation coefficient of the curved surface area of the curved surface display panel; and the compensation coefficient is determined according to the bending angle of the curved surface area. And the compensation module is configured to perform brightness compensation on the plane area by using the first compensation parameter and perform brightness compensation on the curved surface area by using the second compensation parameter.
In some exemplary embodiments, the compensation factor is sin θ, θ being a bending angle of the curved surface region.
In some exemplary embodiments, the curved surface region is located on at least one side of the planar region in a first direction; the display area is divided into a plurality of sub-display areas arranged along a second direction; the at least one sub-display area comprises at least one first display block and at least one second display block which are arranged along the first direction, the first display block is positioned in the plane area, and the second display block is positioned in the curved surface area; the first direction intersects the second direction. The first processing module is configured to determine, for any sub-display area, a first compensation parameter of at least one first display block within the sub-display area. The second processing module is configured to determine, for any sub-display area, a second compensation parameter of a second display block of the sub-display area according to the first compensation parameter of at least one first display block of the sub-display area and the compensation coefficient of the curved surface area.
In some exemplary embodiments, the second processing module is configured to determine, for any sub-display region, an average compensation parameter of the first display blocks of the sub-display region according to the first compensation parameters of the plurality of first display blocks of the sub-display region; and determining a second compensation parameter of a second display block of the sub-display area according to the product of the average compensation parameter of the first display block of the sub-display area and the compensation coefficient of the curved surface area.
In another aspect, embodiments of the present disclosure provide a display device including the brightness compensation device as described above.
Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the example serve to explain the principles of the disclosure and not to limit the disclosure. The shapes and sizes of one or more of the elements in the drawings are not to be considered as true scale, but rather are merely intended to illustrate the present disclosure.
Fig. 1 is a flowchart of a brightness compensation method according to at least one embodiment of the disclosure;
fig. 2 is a schematic plan view of a curved display panel according to at least one embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view taken along line Q-Q' of FIG. 2;
fig. 4 is a schematic diagram illustrating a relationship between luminance of a flat area and luminance of a curved area of a curved display panel according to at least one embodiment of the disclosure;
fig. 5 is a schematic plan view of a curved display panel according to at least one embodiment of the present disclosure;
fig. 6 is a schematic diagram of a luminance compensation apparatus according to at least one embodiment of the present disclosure;
fig. 7 is a schematic view of a display device according to at least one embodiment of the present disclosure.
Detailed Description
Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Embodiments may be embodied in many different forms. One of ordinary skill in the art will readily recognize the fact that the manner and content can be modified into other forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the contents described in the following embodiments. The embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.
In the drawings, the size of one or more constituent elements, the thickness of layers, or regions may be exaggerated for clarity. Accordingly, one aspect of the disclosure is not necessarily limited to the dimensions, and the shapes and sizes of one or more components in the drawings are not intended to reflect actual proportions. Further, the drawings schematically show ideal examples, and one embodiment of the present disclosure is not limited to the shapes, numerical values, and the like shown in the drawings.
The ordinal numbers such as "first", "second", "third", and the like in the present specification are provided for avoiding confusion among the constituent elements, and are not limited in number. The "plurality" in the present disclosure means two or more numbers.
In this specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships are used to explain positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the described directions of the constituent elements. Therefore, the words and phrases described in the specification are not limited thereto, and may be replaced as appropriate depending on the case.
In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited. For example, it may be a fixed connection, or a removable connection, or an integral connection; may be a mechanical connection, or a connection; either directly or indirectly through intervening components, or both may be interconnected. The meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In this specification, "electrically connected" includes a case where constituent elements are connected together by an element having some kind of electrical action. The "element having some kind of electrical action" is not particularly limited as long as it can transmit an electrical signal between connected components. Examples of the "element having a certain electric function" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having a plurality of functions, and the like.
In the present specification, "parallel" means a state in which an angle formed by two straight lines is-10 ° or more and 10 ° or less, and therefore, includes a state in which the angle is-5 ° or more and 5 ° or less. The term "perpendicular" refers to a state in which the angle formed by two straight lines is 80 ° or more and 100 ° or less, and therefore includes a state in which the angle is 85 ° or more and 95 ° or less.
"about" and "approximately" in this disclosure refer to the situation where the limits are not strictly defined, allowing for process and measurement tolerances.
Mura is a common undesirable phenomenon in Organic Light Emitting Diode (OLED) display technology, and is mainly caused by a characteristic difference of each Thin Film Transistor (TFT) due to an immature TFT process. Demura is a compensation method for Mura defects, and is divided into internal compensation and external compensation. The internal compensation adopts a compensation pixel circuit to compensate the characteristic difference of the TFT; the external compensation detects the difference of different pixel units through optical or electrical means and the like, and compensates in a mode of changing the driving voltage. The currently commonly adopted Demura compensation method is that a plurality of gray-scale pictures are shot by a Charge Coupled Device (CCD) camera with high resolution and high precision, then the pixel color distribution characteristics in the displayed pictures are analyzed according to the data collected by the CCD camera, and the Mura data are identified according to an algorithm; and generating Demura compensation data according to a Demura compensation algorithm corresponding to the Mura data, and performing Mura compensation by using the Demura compensation data.
However, the display area of the curved display panel includes a planar area and a curved area, and the light emitting direction of the curved area is different from that of the planar area. When light is transmitted from a high-density medium to a low-density medium, total reflection of the light occurs, and then a part of the light cannot completely penetrate through a cover plate (CG) of the curved display panel and is reflected back to the interior of the panel, and the light of the curved display panel has refraction and vector characteristics. When the CCD camera is used for carrying out Demura photographing from the front side, the display brightness of the curved surface area is lower than that of the plane area, and when the Demura compensation is carried out according to the brightness data collected by the camera, the excessive compensation of the curved surface area is easily caused, so that the display effect of the curved surface display panel is influenced.
Fig. 1 is a flowchart of a brightness compensation method according to at least one embodiment of the present disclosure. As shown in fig. 1, the brightness compensation method provided in this embodiment includes the following steps.
S1, determining a first compensation parameter of a plane area of a curved surface display panel;
s2, determining a second compensation parameter of the curved surface area according to the first compensation parameter of the plane area and the compensation coefficient of the curved surface area;
and S3, performing brightness compensation on the plane area by using the first compensation parameter, and performing brightness compensation on the curved surface area by using the second compensation parameter.
In some exemplary embodiments, the compensation system for the curved surface region may be determined according to a bending angle of the curved surface region. In some examples, the compensation factor is sin θ, θ being the bend angle of the curved surface region. The bending angle of the curved surface region is the included angle between the vertical plane of the plane region and the extension plane of the curved surface region (or the tangent plane of the plane where the curved surface region is located). For example, θ is greater than 0 and less than 90 degrees. However, this embodiment is not limited to this.
In some exemplary embodiments, the display area of the curved display panel includes a flat area and at least one curved area. In some examples, the display area of the curved display panel may include a planar area and one curved area located on one side of the planar area, or may include a planar area and two curved areas located on opposite sides of the planar area. However, this embodiment is not limited to this.
In some exemplary embodiments, the first compensation parameter of the flat area of the curved display panel may be Demura compensation data acquired by using a Demura compensation method.
According to the embodiment, the compensation coefficient of the curved surface region is obtained by using the bending angle of the curved surface region according to the characteristics of total reflection, refraction, vector performance and the like of the light of the curved surface region of the curved surface display panel, so that the second compensation parameter of the curved surface region is determined by using the first compensation parameter of the plane region and the compensation coefficient of the curved surface region, and the first compensation parameter and the second compensation parameter are used for performing brightness compensation on the plane region and the curved surface region respectively, so that the display uniformity of the curved surface display panel is improved.
Fig. 2 is a schematic plan view of a curved display panel according to at least one embodiment of the disclosure. Fig. 3 is a partial cross-sectional view taken along the direction Q-Q' in fig. 2.
In some exemplary embodiments, a display area of a curved display panel is provided with a plurality of pixel units. In some examples, one pixel unit may include three sub-pixels, which may be red, green, and blue sub-pixels, respectively. However, this embodiment is not limited to this. In some examples, one pixel unit may include four sub-pixels, which may be a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel, respectively.
In some exemplary embodiments, the shape of the sub-pixel may be a rectangle, a diamond, a pentagon, or a hexagon. When one pixel unit comprises three sub-pixels, the three sub-pixels can be arranged in a horizontal parallel mode, a vertical parallel mode or a delta character mode; when a pixel unit comprises four sub-pixels, the four sub-pixels can be arranged in a horizontal parallel manner, a vertical parallel manner or a square manner. However, this embodiment is not limited to this.
In some exemplary embodiments, the sub-pixel may include: a pixel circuit and a light emitting element electrically connected to the pixel circuit. The pixel circuit may include a plurality of transistors and at least one capacitor, for example, the pixel circuit may be a 3T1C (3 transistors and 1 capacitor) structure, a 7T1C (7 transistors and 1 capacitor) structure, or a 5T1C (5 transistors and 1 capacitor) structure. In some examples, the light emitting element may be an OLED device. The light emitting element may include: the organic light emitting device includes a first electrode, a second electrode, and an organic light emitting layer between the first electrode and the second electrode. The first electrode of the light emitting element may be electrically connected to the corresponding pixel circuit. However, this embodiment is not limited to this.
In some exemplary embodiments, as shown in fig. 2 and 3, the display area of the curved display panel includes a flat area 100, a first curved area 200a, and a second display area 200b. The first curved surface area 200a and the second curved surface area 200b are located on opposite sides of the planar area 100 in the first direction X. For example, the display region is provided with w columns of pixel cells. 1 st column to x 1 The column pixel units may be located in the first curved surface region 200a, the x-th curved surface region 2 The pixel units from the column to the w column can be positioned in the second curved surface area, the x 1 +1 columns to x 2 A column of-1 pixel cells may be located in the planar region 100. However, this embodiment is not limited to this.
In some exemplary embodiments, as shown in fig. 2, the first curved surface area 200a and the second curved surface area 200b may be substantially symmetrical with respect to a center line of the display area in the first direction X. The curved shapes of the first curved surface area 200a and the second curved surface area 200b may be substantially the same. That is, the bending angles of the first curved surface area 200a and the second curved surface area 200b may be substantially the same. However, this embodiment is not limited to this. For example, the first curved surface region and the second curved surface region may be asymmetric with respect to a center line of the display region in the first direction X, and the bending angles of the first curved surface region and the second curved surface region may be different.
In some examples, as shown in fig. 2, the first direction X is perpendicular to the second direction Y. The planes of the first direction X and the second direction Y are parallel to the plane of the planar area 100. As shown in fig. 3, the third direction Z is perpendicular to the plane in which the first direction X and the second direction Y lie.
In some exemplary embodiments, when the bending angles of the first curved surface area and the second curved surface area are the same, the compensation coefficients of the first curved surface area and the second curved surface area are the same. When the bending angles of the first curved surface area and the second curved surface area are different, the compensation coefficients of the first curved surface area and the second curved surface area can be different.
Fig. 4 is a schematic diagram illustrating a relationship between luminance of a flat area and luminance of a curved area of a curved display panel according to at least one embodiment of the disclosure. In some exemplary embodiments, the flat area 100 and the second curved area 200b of the curved display panel are taken as an example for explanation. The flat area 100 and the second curved area 200b of the curved display panel shown in fig. 3 may be approximately converted into the structure shown in fig. 4. The bending angle θ of the second curved surface region 200b may be an included angle between a tangent plane of a plane where the second curved surface region 200b is located and a vertical plane of the planar region 100.
In this example, one display point of a flat area of a curved display panel is taken as an example for explanation. As shown in fig. 4, there are cases of total reflection and refraction of light rays, etc. at the first display point P1 of the plane area 100. The display brightness value (DBV, disp) of the first display point P1 in the direction perpendicular to the plane of the planar area (i.e. the third direction Z)lay Brightness Value)L 1 The method can comprise the following steps: display brightness value L of emergent ray along third direction Z v1 And refract the light ray L 11 Display luminance value L in third direction Z component 1Y . I.e. L 1 ＝L v1 +L 1Y . Wherein the refracted light ray L 11 Incident light of L 01 . The light L2 is totally reflected by the first display point P1. Similarly, for the curved surface region, the display brightness value of the second display point P2 of the second curved surface region 200b in the third direction Z is also L 1 . Since the bending angle of the second curved surface region 200b is θ, the display brightness value L of the second display point P2 of the second curved surface region 200b along the vertical direction of the plane of the second curved surface region 2 ＝L 1 X sin θ. Therefore, it can be found that the relationship between the display luminance values of the second curved surface region and the flat surface region is L 2 ：L 1 ＝sinθ。
According to the exemplary embodiment, through research on the refraction, total reflection and vector relation of light, the ratio of the display brightness value of the curved surface area to the display brightness value of the plane area of the curved surface display panel is about sin theta, and by utilizing the relation, the compensation parameters of the plane area and the curved surface area can be respectively determined, and the brightness compensation is respectively carried out on the plane area and the curved surface area, so that the display uniformity of the curved surface display panel is improved.
In some exemplary embodiments, a first compensation parameter of the planar area may be acquired using a Demura compensation method. For example, a high-precision and high-resolution CCD camera may be used to photograph the curved display panel, the Mura data may be obtained after the image is obtained and processed to a certain extent, and the first compensation parameter of the planar region may be calculated by the Demura compensation algorithm. And then, obtaining a second compensation parameter of the curved surface area by using the first compensation parameter of the planar area and the compensation coefficient of the curved surface area. And then, performing brightness compensation on the plane area by using the first compensation parameter, and performing brightness compensation on the curved surface area by using the second compensation parameter. In some examples, the second compensation parameter for the curved surface region is equal to the product of the first compensation parameter for the planar surface region and sin θ. In addition, the embodiment is not limited to the specific implementation manner of the Demura compensation algorithm.
In some exemplary embodiments, the compensated display gray scale of the planar region may be determined using the display gray scale of the planar region and the first compensation parameter, the compensated display gray scale of the curved region may be determined using the display gray scale of the curved region and the second compensation parameter, and the luminance compensation may be performed on the planar region and the curved region by displaying the compensated gray scales on the planar region and the curved region. However, the present embodiment is not limited to this.
Fig. 5 is another schematic plan view of a display area according to at least one embodiment of the disclosure. In some exemplary embodiments, the display area of the curved display panel may be divided into a plurality of sub-display areas 101 arranged in the second direction Y. The sub display region 101 may include a plurality of first display blocks 1011 and a plurality of second display blocks 1012 arranged in the first direction X. The plurality of first display blocks 1011 are located in a flat area and the plurality of second display blocks 1012 are located in a curved area. For example, a portion of the second display block 1012 is located in the first curved surface region, and another portion is located in the second curved surface region. In this example, the sub display region 101 may include a plurality of display blocks (i.e., a row of display blocks) arranged in the first direction X, wherein a display block located in a flat region may be referred to as a first display block, and wherein a display block located in a curved region may be referred to as a second display block. In some examples, at least one pixel cell is disposed within each display block. In some examples, the first display tile and the second display tile may be the same size. However, this embodiment is not limited to this. For example, the first display block and the second display block may be different in size.
In some exemplary embodiments, the first compensation parameters of the plurality of first display blocks within each sub display area of the flat area may be determined by a Demura compensation method. Then, for any sub-display area, an average compensation parameter of a plurality of first display blocks of the sub-display area is calculated. And determining a second compensation parameter of the curved surface area by using the average compensation parameter of the first display block and the compensation coefficient of the curved surface area. For example, if the average compensation parameter of the first display block is δ, the second compensation parameter of the curved surface region is δ x sin θ, where θ is the bending angle of the curved surface region. In this example, for a line of display blocks of the display area, the second compensation parameter of the line of display blocks in the curved surface area may be determined according to the average compensation parameter of the line of display blocks in the planar area, so that the luminance compensation effect of the curved surface area may be improved, and the overcompensation condition of the curved surface area may be improved.
In some exemplary embodiments, the first curved surface area and the second curved surface area on both sides of the planar area in the first direction X have the same bending angle, and the compensation coefficients of the two curved surface areas are the same. The first curved surface area and the second curved surface area on the two sides of the plane area in the first direction X have different bending angles, and then the compensation coefficients of the two curved surface areas are different. The average compensation parameter of the plane area of a line of display blocks and the compensation coefficients of the two curved surface areas are used for respectively obtaining second compensation parameters of the two curved surface areas at two sides of the plane area of the line of display blocks, and the first curved surface area and the second curved surface area at two sides of the plane area of the line of display blocks are respectively subjected to brightness compensation by using different second compensation parameters.
In the present exemplary embodiment, the binding region is located at one side of the display region in the second direction Y, and the binding region may set the control integrated circuit. The brightness of the sub-display region near the binding region and the brightness of the sub-display region far from the binding region are not uniform due to the IR Drop (Drop). In this example, by determining the compensation parameters for each of the plurality of sub-display regions to perform brightness compensation, brightness unevenness due to IR drop can be improved, and overcompensation and undercompensation for sub-display regions far from or near the binding region can be avoided. Moreover, the overcompensation for the curved surface region can be improved by performing brightness compensation by calculating compensation parameters for each of the first display block and the second display block of the plurality of sub display regions. In the exemplary embodiment, the multiple sub-display regions are subjected to differential brightness compensation, and the plane region and the curved surface region where at least one sub-display region is located are subjected to differential brightness compensation, so that the brightness unevenness caused by the IR drop can be improved, the brightness compensation effect of the curved surface region can be improved, the overcompensation and undercompensation of the display regions are avoided, and the Demura compensation effect of the display regions is improved.
Fig. 6 is a schematic diagram of a luminance compensation apparatus according to at least one embodiment of the present disclosure. In some exemplary embodiments, as shown in fig. 6, the luminance compensation apparatus of the present embodiment may include: the device comprises a first processing module, a second processing module and a compensation module. The first processing module is configured to determine a first compensation parameter of a planar area of the curved display panel. And the second processing module is configured to determine a second compensation parameter of the curved surface area of the curved surface display panel according to the first compensation parameter and the compensation coefficient of the curved surface area of the curved surface display panel. And the compensation coefficient of the curved surface area is determined according to the bending angle of the curved surface area. And the compensation module is configured to perform brightness compensation on the plane area by using the first compensation parameter and perform brightness compensation on the curved surface area by using the second compensation parameter.
In some exemplary embodiments, the compensation factor is sin θ, θ being the bend angle of the curved surface region.
In some exemplary embodiments, the curved surface region is located on at least one side of the planar region in the first direction. The display area is divided into a plurality of sub-display areas arranged in the second direction. The at least one sub-display area comprises at least one first display block and at least one second display block which are arranged along a first direction, the first display block is located in the plane area, and the second display block is located in the curved surface area. The first direction intersects the second direction. The first processing module is configured to determine a first compensation parameter of at least one first display block in any sub-display area. And the second processing module is configured to determine a second compensation parameter of a second display block of any sub-display area according to the first compensation parameter of at least one first display block of the sub-display area and the compensation coefficient of the curved surface area.
In some exemplary embodiments, the second processing module is configured to determine, for any sub-display area, an average compensation parameter of first display blocks of the sub-display area according to the first compensation parameters of the plurality of first display blocks of the sub-display area; and determining a second compensation parameter of a second display block of the sub-display area according to the product of the average compensation parameter of the first display block of the sub-display area and the compensation coefficient of the curved surface area.
For the description of the brightness compensation device of the present embodiment, reference may be made to the description of the brightness compensation method, and therefore, the description thereof is omitted here.
Fig. 7 is a schematic view of a display device according to at least one embodiment of the present disclosure. As shown in fig. 7, the present embodiment provides a display device 91 including the brightness compensation device 910 of the previous embodiments. In some examples, the display device 91 may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame or a navigator, etc. However, this embodiment is not limited to this.
In addition, at least one embodiment of the present disclosure further provides a non-transitory computer-readable storage medium storing a computer program, which when executed, implements the steps of the brightness compensation method.
One of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules or units in the apparatus disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules or units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The foregoing illustrates and describes the general principles, principal features, and advantages of the present disclosure. The present disclosure is not limited by the above-described embodiments, which are described in the specification and drawings only to illustrate the principles of the disclosure, but also to provide various changes and modifications within the scope of the claimed disclosure without departing from the spirit and scope thereof.

Claims (4)

1. The brightness compensation method is characterized by being applied to a curved surface display panel, wherein the display area of the curved surface display panel comprises a plane area and at least one curved surface area; the curved surface area is positioned on at least one side of the plane area in the first direction; the display area is divided into a plurality of sub-display areas arranged along a second direction; the at least one sub-display area comprises a plurality of first display blocks and at least one second display block which are arranged along the first direction, the first display blocks are positioned in the plane area, and the second display blocks are positioned in the curved surface area; the first direction intersects with a second direction;
the brightness compensation method includes:
determining a first compensation parameter of a plane area of the curved surface display panel;
determining a second compensation parameter of the curved surface area according to the first compensation parameter and the compensation coefficient of the curved surface area; the compensation coefficient is determined according to the bending angle of the curved surface area; aiming at any sub-display area, determining an average compensation parameter of a first display block of the sub-display area according to first compensation parameters of a plurality of first display blocks of the sub-display area; determining a second compensation parameter of a second display block of the sub-display area according to the product of the average compensation parameter of the first display block of the sub-display area and the compensation coefficient of the curved surface area; the compensation coefficient is sin theta, and theta is the bending angle of the curved surface area;
and performing brightness compensation on the plane area by using the first compensation parameter, and performing brightness compensation on the curved surface area by using the second compensation parameter.
2. The method of claim 1, wherein θ is greater than 0 and less than 90 degrees.
3. The brightness compensation device is applied to a curved surface display panel, and the display area of the curved surface display panel comprises a plane area and at least one curved surface area; the curved surface area is positioned on at least one side of the plane area in the first direction; the display area is divided into a plurality of sub-display areas arranged along a second direction; the at least one sub-display area comprises a plurality of first display blocks and at least one second display block which are arranged along the first direction, the first display blocks are located in the plane area, and the second display blocks are located in the curved surface area; the first direction intersects with a second direction;
the luminance compensation apparatus includes:
the system comprises a first processing module, a second processing module and a control module, wherein the first processing module is configured to determine a first compensation parameter of a plane area of a curved display panel;
the second processing module is configured to determine a second compensation parameter of the curved surface area of the curved surface display panel according to the first compensation parameter and a compensation coefficient of the curved surface area of the curved surface display panel; aiming at any sub-display area, determining an average compensation parameter of a first display block of the sub-display area according to first compensation parameters of a plurality of first display blocks of the sub-display area; determining a second compensation parameter of a second display block of the sub-display area according to the product of the average compensation parameter of the first display block of the sub-display area and the compensation coefficient of the curved surface area; the compensation coefficient is determined according to the bending angle of the curved surface area; the compensation coefficient is sin theta, and theta is the bending angle of the curved surface area;
and the compensation module is configured to perform brightness compensation on the plane area by using the first compensation parameter and perform brightness compensation on the curved surface area by using the second compensation parameter.
4. A display device comprising the luminance compensation device as claimed in claim 3.
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