CN111161678A - Gamma voltage adjusting method, driving method and device for curved surface display panel - Google Patents
Gamma voltage adjusting method, driving method and device for curved surface display panel Download PDFInfo
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- CN111161678A CN111161678A CN202010000570.6A CN202010000570A CN111161678A CN 111161678 A CN111161678 A CN 111161678A CN 202010000570 A CN202010000570 A CN 202010000570A CN 111161678 A CN111161678 A CN 111161678A
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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]
- G09G3/3225—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] using an active matrix
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
本发明提供了一种曲面显示面板的伽马电压调整方法、驱动方法及装置，其中，所述伽马电压调整方法包括：在所述曲面显示面板水平放置时，确定白平衡状态下所述曲面显示面板的平面显示区的第一伽马电压；根据所述曲面显示面板的弯折程度，将所述曲面显示面板划分为至少一个曲面显示区，其中，各所述曲面显示区相对于所述平面显示区弯折一预设角度；确定白平衡状态下，各所述曲面显示区对应的第二伽马电压；根据所述第一伽马电压和所述第二伽马电压，确定各所述曲面显示区中每列数据线对应的补偿电压。用于提高曲面显示面板的显示效果。
The present invention provides a gamma voltage adjustment method, driving method and device for a curved display panel, wherein the gamma voltage adjustment method includes: when the curved display panel is placed horizontally, determining the curved surface in a white balance state the first gamma voltage of the flat display area of the display panel; according to the bending degree of the curved display panel, the curved display panel is divided into at least one curved display area, wherein each curved display area is relative to the curved display area. The flat display area is bent by a preset angle; in the white balance state, the second gamma voltage corresponding to each of the curved display areas is determined; according to the first gamma voltage and the second gamma voltage, each The compensation voltage corresponding to each column of data lines in the curved display area. Used to improve the display effect of the curved display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a gamma voltage adjusting method, a driving method and a device of a curved surface display panel.
Background
An Active-matrix electroluminescent display panel (AMOLED) is an important flexible display panel, and has excellent characteristics of self-luminescence, no need of a backlight source, wide color gamut, high contrast, thin thickness, wide viewing angle, fast response speed, applicability to a flexible panel, wide temperature range of use, simple structure and process, and the like.
Generally, after each AMOLED is prepared, the brightness of each level of gray scale needs to be modulated according to a predetermined Gamma (Gamma) standard curve, so that each level of brightness of the AMOLED conforms to the Gamma standard curve, thereby ensuring that the AMOLED can accurately display detailed contents of different brightness in an image when the image is displayed. The gamma voltage is a voltage set according to a predetermined gamma standard curve to perform gray scale display as the AMOLED. The gamma voltages convert digital signals generated by the time schedule controller into analog signals corresponding to gray scale voltages under the action of a digital-to-analog converter of the display driving chip and input the analog signals to the AMOLED, so that image display is realized.
In a rigid AMOLED product, the display areas are all in the same horizontal plane, and after a Gamma adjustment (Gamma tuning) process, the Gamma voltages output to the AMOLED are the same, and the display areas are all in a white balance state, so that there is no color shift in a front view. However, in the current AMOLED flexible display product, two sides of the AMOLED are bent curved surfaces, and the curved surface display area displays radian displays with different curvatures, and if the same gamma voltage is input to all the display areas, the curved surface display area inevitably has an obvious color shift phenomenon, that is, when the display areas are observed from different angles, the color shift problem exists in different positions of the display areas at different degrees.
Therefore, how to adjust the gamma voltage to improve the display effect of the curved display panel is an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a gamma voltage adjusting method, a driving method and a device of a curved surface display panel, which are used for improving the display effect of the curved surface display panel.
In a first aspect, an embodiment of the present invention provides a gamma voltage adjustment method for a curved display panel, including:
when the curved surface display panel is horizontally placed, determining a first gamma voltage of a plane display area of the curved surface display panel in a white balance state;
dividing the curved surface display panel into at least one curved surface display area according to the bending degree of the curved surface display panel, wherein each curved surface display area is bent by a preset angle relative to the plane display area;
determining a second gamma voltage corresponding to each curved surface display area in a white balance state;
and determining compensation voltage corresponding to each row of data lines in each curved surface display area according to the first gamma voltage and the second gamma voltage.
In a possible implementation manner, the determining, according to the first gamma voltage and the second gamma voltage, a compensation voltage corresponding to each column of data lines in each curved display area includes:
taking the first gamma voltage as a gamma voltage of a first column of data lines in the curved display area, wherein the first column of data lines is close to the flat display area;
taking the second gamma voltage as the gamma voltage of an nth column of data lines in the curved surface display area, wherein the nth column of data lines is far away from the plane display area, and n is an integer greater than 2;
determining the gamma voltage of any one column of (n-2) column data lines between the first column of data lines and the nth column of data lines by utilizing an arithmetic of equality according to the gamma voltage of the first column of data lines and the gamma voltage of the nth column of data lines;
and subtracting the first gamma voltage from the gamma voltage of each row of data lines in the curved surface display area to obtain the compensation voltage corresponding to each row of data lines.
In a possible implementation manner, after determining a compensation voltage corresponding to each column of data lines in each curved display area according to the first gamma voltage and the second gamma voltage, the method further includes:
adjusting a second gamma voltage corresponding to each curved surface display area according to the compensation voltage corresponding to each line of data lines in each curved surface display area to obtain an adjusted second gamma voltage;
storing the adjusted second gamma voltage.
In one possible implementation manner, the determining the second gamma voltage corresponding to each curved display area in the white balance state includes:
measuring the brightness value of the corresponding curved surface display area when displaying each gray scale along the direction of the preset angle which is the included angle between the curved surface display area and the plane where the planar display area is located, and generating a corresponding first gamma curve;
and taking the gamma voltage corresponding to the coincidence of the first gamma curve and the gamma standard curve as the second gamma voltage corresponding to the curved surface display area.
In one possible implementation manner, the determining a first gamma voltage of a flat display area of the curved display panel in a white balance state includes:
measuring the brightness value of the plane display area when displaying each gray scale along the direction vertical to the plane of the plane display area, and generating a corresponding second gamma curve;
and taking the gamma voltage corresponding to the coincidence of the second gamma curve and the gamma standard curve as the first gamma voltage of the plane display area.
In a second aspect, an embodiment of the present invention further provides a method for driving a curved display panel, including:
determining a plane display area and a curved surface display area of the curved surface display panel;
calling pre-stored gamma voltages respectively corresponding to the plane display area and the curved surface display area;
and determining a driving signal corresponding to the image to be displayed according to the pre-stored gamma voltages respectively corresponding to the plane display area and the curved surface display area, and driving the image to be displayed to display.
In a third aspect, an embodiment of the present invention further provides a gamma voltage adjusting apparatus for a curved display panel, including:
a first determining unit for determining a first gamma voltage of a flat display region of the curved display panel in a white balance state when the curved display panel is horizontally placed;
the dividing unit is used for dividing the curved surface display panel into at least one curved surface display area according to the bending degree of the curved surface display panel, wherein each curved surface display area is bent by a preset angle relative to the plane display area;
the second determining unit is used for determining a second gamma voltage corresponding to each curved surface display area in a white balance state;
and the third determining unit is used for determining compensation voltage corresponding to each row of data lines in each curved surface display area according to the first gamma voltage and the second gamma voltage.
In a possible implementation manner, the third determining unit is configured to:
taking the first gamma voltage as a gamma voltage of a first column of data lines in the curved display area, wherein the first column of data lines is close to the flat display area;
taking the second gamma voltage as the gamma voltage of an nth column of data lines in the curved surface display area, wherein the nth column of data lines is far away from the plane display area, and n is an integer greater than 2;
determining the gamma voltage of any one column of (n-2) column data lines between the first column of data lines and the nth column of data lines by utilizing an arithmetic of equality according to the gamma voltage of the first column of data lines and the gamma voltage of the nth column of data lines;
and subtracting the first gamma voltage from the gamma voltage of each row of data lines in the curved surface display area to obtain the compensation voltage corresponding to each row of data lines.
In one possible implementation, the gamma voltage adjusting apparatus further includes:
the adjusting unit is used for adjusting the second gamma voltage corresponding to each curved surface display area according to the compensation voltage corresponding to each row of data lines in each curved surface display area so as to obtain the adjusted second gamma voltage;
and a storage unit for storing the adjusted second gamma voltage.
In a fourth aspect, an embodiment of the present invention further provides a driving apparatus for a curved display panel, including:
the fourth determining unit is used for determining a plane display area and a curved surface display area of the curved surface display panel;
the calling unit is used for calling the gamma voltages which are stored in advance and respectively correspond to the plane display area and the curved surface display area;
and the driving unit is used for determining a driving signal corresponding to the image to be displayed according to the gamma voltages which are stored in advance and respectively correspond to the plane display area and the curved surface display area, and driving the image to be displayed to display.
In a fifth aspect, an embodiment of the present invention further provides a display device, including:
a curved display panel, and a driving device as described above.
The invention has the following beneficial effects:
the embodiment of the invention provides a gamma voltage adjusting method, a driving method and a device of a curved surface display panel. Therefore, the compensation of the second gamma voltage of the curved display area can be realized. Because the flat display area and the curved display area respectively adopt the gamma voltages corresponding to the flat display area and the curved display area, when the curved display panel carries out display output, the flat display area and the curved display area are both in a white balance state, and the phenomenon of color cast can not occur, thereby improving the display effect of the curved display panel.
Drawings
FIG. 1 is a schematic diagram illustrating a distribution of display regions of a curved display panel in the related art;
FIG. 2 is a flowchart of a method for adjusting gamma voltage of a curved display panel according to an embodiment of the present invention;
FIG. 3 is a side view of the curved display panel of FIG. 1;
FIG. 4 is a flowchart illustrating a method of step S104 in a gamma voltage adjustment method for a curved display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a distribution of data lines in two curved display regions of the curved display panel shown in FIG. 3;
FIG. 6 is a schematic diagram of one of the gamma arrays corresponding to the data lines X1 and Y1 shown in FIG. 5;
FIG. 7 is a diagram illustrating three gamma voltage components corresponding to the data lines X1 and Y1 shown in FIG. 5;
FIG. 8 is a schematic diagram of one of the gamma arrays corresponding to the data lines Xn shown in FIG. 5;
FIG. 9 is a schematic diagram of one of the gamma arrays corresponding to the data lines Ym shown in FIG. 5;
FIG. 10 is a schematic diagram of the compensation voltages of the sub-pixels of each color in the b binding points under any column of data lines in the curved display area ② shown in FIG. 5;
FIG. 11 is a schematic diagram of the compensation voltages of the sub-pixels of each color in the b binding points under any column of data lines in the curved display area ③ shown in FIG. 5;
FIG. 12 is a flowchart illustrating a method after step S104 in a gamma voltage adjustment method for a curved display panel according to an embodiment of the present invention;
FIG. 13 is a schematic diagram illustrating the distribution of gamma adjustment testing devices corresponding to the curved display panel shown in FIG. 3;
FIG. 14 is a diagram of a gamma standard curve with a gamma value of 2.2;
FIG. 15 is a flowchart illustrating a method of step S103 in a gamma voltage adjustment method for a curved display panel according to an embodiment of the present invention;
FIG. 16 is a flowchart illustrating a method of step S101 in a gamma voltage adjustment method for a curved display panel according to an embodiment of the present invention;
fig. 17 is a flowchart of a method for driving a curved display panel according to an embodiment of the present invention;
FIG. 18 is a schematic structural diagram of a gamma voltage adjustment apparatus for a curved display panel according to an embodiment of the present invention;
fig. 19 is a schematic structural diagram of a driving apparatus for a curved display panel according to an embodiment of the present invention;
fig. 20 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
At present, the AMOLED flexible display product only carries out gamma adjustment aiming at a plane display area of the AMOLED flexible display product, and in actual display, the same gamma voltage is input into the plane display area and a curved surface display area, so that the color cast problem of different degrees can exist at different positions of the display area.
For example, as shown in fig. 1, in the case where the user looks at the flexible display panel from the front, the display region ① is in a white balance state, and both the display region ② and the display region ③ have a color shift phenomenon, while in the case where the user looks at the flexible display panel from the side, the display region ② is in a white balance state, and both the display region ③ and the display region ① have a color shift phenomenon, or the display region ③ is in a white balance state, and both the display region ① and the display region ② have a color shift phenomenon.
In view of this, an embodiment of the present invention provides a method for adjusting gamma voltage of a curved display panel, as shown in fig. 2, including:
s101: when the curved surface display panel is horizontally placed, determining a first gamma voltage of a plane display area of the curved surface display panel in a white balance state;
in a specific implementation process, the first gamma voltage is a gamma voltage adjusted by a standard gamma curve.
S102: dividing the curved surface display panel into at least one curved surface display area according to the bending degree of the curved surface display panel, wherein each curved surface display area is bent by a preset angle relative to the plane display area;
in practical applications, the position relationship between the flat display area and the curved display area of the curved display panel may be set as required, for example, the position relationship may still be as shown in fig. 1, specifically, the curved display area ①, the flat display area β 0, and the curved display area ③ are sequentially arranged along the direction extending from the grid line, in the same curved display panel, the bending angle of the different curved display areas relative to the flat display area may be the same value or different values, and is not limited herein, as shown in fig. 3, a side view of the curved display panel is shown, the bending angle of the curved display area ① relative to the flat display area ② is α, the bending angle of the curved display area ③ relative to the flat display area ② is β, wherein α and β may be the same value or different values, and in practical applications, the bending angle of each curved display area relative to the flat display area may be greater than 90 degrees, and may be different from the predetermined bending angle of the flat display area 90 degrees.
S103: determining a second gamma voltage corresponding to each curved surface display area in a white balance state;
in a specific implementation process, if N curved surface display areas exist, a second gamma voltage corresponding to each curved surface display area in the N curved surface display areas in a white balance state is determined, wherein N is a positive integer. The second gamma voltages of each curved display area may be the same value or different values, and are not limited herein.
S104: and determining compensation voltage corresponding to each row of data lines in each curved surface display area according to the first gamma voltage and the second gamma voltage.
In a specific implementation process, the compensation voltage corresponding to each line of data lines in each curved surface display area is determined directly according to the first gamma voltage of the flat surface display area and the second gamma voltage of the curved surface display area, that is, the compensation voltage corresponding to all lines of data lines in each curved surface display area is determined, for example, when M lines of data lines exist in the curved surface display area ①, the compensation voltage corresponding to each line of data lines in the M lines of data lines is determined.
In the gamma voltage adjusting method provided in the embodiment of the present invention, after the compensation voltage corresponding to each row of data lines in each curved surface display area is determined, the compensation of the second gamma voltage in the curved surface display area can be implemented. Because the flat display area and the curved display area respectively adopt the gamma voltages corresponding to the flat display area and the curved display area, when the curved display panel carries out display output, the flat display area and the curved display area are both in a white balance state, and the phenomenon of color cast can not occur, thereby improving the display effect of the curved display panel.
In the embodiment of the present invention, please refer to fig. 4, step S104: determining compensation voltages corresponding to each row of data lines in each curved display area according to the first gamma voltage and the second gamma voltage, including:
s201: taking the first gamma voltage as a gamma voltage of a first column of data lines in the curved display area, wherein the first column of data lines is close to the flat display area;
s202: taking the second gamma voltage as the gamma voltage of an nth column of data lines in the curved surface display area, wherein the nth column of data lines is far away from the plane display area, and n is an integer greater than 2;
s203: determining the gamma voltage of any one column of (n-2) column data lines between the first column of data lines and the nth column of data lines by utilizing an arithmetic of equality according to the gamma voltage of the first column of data lines and the gamma voltage of the nth column of data lines;
s204: and subtracting the first gamma voltage from the gamma voltage of each row of data lines in the curved surface display area to obtain the compensation voltage corresponding to each row of data lines.
In the specific implementation process, the specific implementation process from step S201 to step S204 is as follows:
first, if the gamma voltage of the first column of data lines in the curved display area is equal to gamma voltage of the first column of data lines in the curved display area, wherein the first column of data lines is close to the flat display area, that is, the gamma voltage of the first column of data lines in the curved display area is equal to gamma voltage of the first column of data lines close to the flat display area, the display area shown in fig. 1 is divided into, for example, the first gamma voltage of the flat display area ① is gamma1, and the gamma voltage of the first column of data lines X1 in the curved display area ② is gamma 1. in the specific implementation, the second gamma voltage of the curved display area is equal to gamma voltage of the nth column of data lines in the curved display area, wherein the nth column of data lines is far from the flat display area, n is an integer greater than 2, such as 10,20,100, etc., for example, the second gamma voltage of the curved display area 2, the curved display area ② is far from the flat display area ①, and the gamma voltage of the column of data lines dl-cd is equal to the gamma voltage of the curved display area, and the gamma voltage of the curved display area is equal to the gamma voltage of the curved display area, the curved display area can be further characterized by the gamma voltage of the curved display area (1-phi) and the gamma voltage of the curved display area, the curved display area can be equal to No. 1, and the curved display area, the curved display area can be equal to No. 1, and the curved display area can be obtained by the curved display area, and the curved display area can be equal to No. 1, No. 1, No. 1, No. 1, No. 1.
In order to clearly illustrate the technical solution of the present invention, a specific implementation process of step S201 to step S204 is described below as a specific example.
Fig. 5 is a schematic diagram showing a distribution of data lines in two curved surface display regions ② and ③ in a curved surface display panel, where X represents a data line in a curved surface display region ②, Y represents a data line in a curved surface display region ③ 0, n columns of data lines are shared in the curved surface display region ②, m columns of data lines are shared in the curved surface display region ③ 1, m and n are integers greater than 2, and m and n may be equal values or unequal values, X1 represents a first column of data lines in the curved surface display region ②, Xn represents an nth column of data lines in the curved surface display region ②, Xc represents a c column of data lines in the curved surface display region ②, c is greater than or equal to 2 and less than or equal to (n-1) positive integer, Y1 represents a first column of data lines in the curved surface display region ③, Ym represents an mth column of data lines in the curved surface display region ③, Yd represents a column of data lines in the curved surface display region ③, d is greater than or equal to 2, and less than or equal to (n-1) positive integer.
FIG. 6 shows a gamma array corresponding to b gamma voltage bindings corresponding to X1 and Y1, where b is a positive integer greater than 2, W (a-2) represents the gamma voltage X1 at the binding point W [ b-2], and W (a-1) represents the gamma voltage X1 at the binding point W [ b-1 ]. Generally, the gamma voltage of each binding point includes gamma voltage components of sub-pixels of three colors of red, green and blue, and accordingly, the gamma voltages corresponding to the gamma voltage components of the sub-pixels of three colors of red, green and blue under B gamma voltages corresponding to X1 and Y1 are shown in fig. 7, where R1 represents the gamma voltage component corresponding to the sub-pixel of red, G1 represents the gamma voltage component corresponding to the sub-pixel of green, and B1 represents the gamma voltage component corresponding to the sub-pixel of blue. R (a-1) represents the gamma voltage component of the red sub-pixel corresponding to the binding point R [ b-1] under X1 or Y1, and R (a-2) represents the gamma voltage component of the red sub-pixel corresponding to the binding point R [ b-2] under X1 or Y1. G (a-1) represents the gamma voltage component of the green sub-pixel corresponding to the binding G [ b-1] under X1 or Y1, and G (a-2) represents the gamma voltage component of the green sub-pixel corresponding to the binding G [ b-2] under X1 or Y1. B (a-1) represents the gamma voltage component of the blue sub-pixel corresponding to the binding point B [ B-1] under X1 or Y1, and B (a-2) represents the gamma voltage component of the blue sub-pixel corresponding to the binding point B [ B-2] under X1 or Y1.
As shown in fig. 8, the gamma array corresponding to b gamma voltage bindings corresponding to Xn includes a gamma voltage component Rn corresponding to a red sub-pixel, a gamma voltage component Gn corresponding to a green sub-pixel, and a gamma voltage component Bn corresponding to a blue sub-pixel, where R (n-1) represents a gamma voltage component of a red sub-pixel corresponding to a binding R [ b-1] under Xn, and R (n-2) represents a gamma voltage component of a red sub-pixel corresponding to a first binding R [ b-2] under Xn. G (n-1) represents the gamma voltage component of the green sub-pixel corresponding to the binding G [ b-1] under Xn, and G (n-2) represents the gamma voltage component of the green sub-pixel corresponding to the binding G [ b-2] under Xn. B (n-1) represents the gamma voltage component of the blue sub-pixel corresponding to the binding B [ B-1] under Xn, and B (n-2) represents the gamma voltage component of the blue sub-pixel corresponding to the binding B [ B-2] under Xn.
In a specific implementation process, if the bending angles of the curved surface display region ② and the curved surface display region ③ are different, the gamma voltages corresponding to the curved surface display region are usually different, as shown in fig. 9, the gamma array corresponding to the binding points of B gamma voltages corresponding to Ym includes a gamma voltage component Rm corresponding to a red sub-pixel, a gamma voltage component Gm corresponding to a green sub-pixel, a gamma voltage component Bm corresponding to a blue sub-pixel, R (m-1) represents a gamma voltage component of a red sub-pixel corresponding to a binding point R [ B-1] under Xn, R (m-2) represents a gamma voltage component of a red sub-pixel corresponding to a binding point R [ B-2] under X m, G (m-1) represents a gamma voltage component of a green sub-pixel corresponding to a binding point G [ B-1] under Xm, G (m-2) represents a gamma voltage component B-2 corresponding to a green sub-pixel, B-1] under Xm represents a gamma voltage component B-2 corresponding to a blue sub-pixel, and G (m-2) represents a gamma voltage component B-1 corresponding to a blue sub-pixel under Xm represents a binding point G [ B-2] under 6335.
In the example shown in fig. 6 to 9, the compensation voltage △ R (b-1) of each color sub-pixel corresponding to the binding point W [ b-1] in b binding points under all column data lines in the curved surface display area ② is (c-1) (R (n-1) -R (a-1))/(n-1), the compensation voltage △ R (b-2) of each color sub-pixel corresponding to the binding point W [ b-2] is (c-1) (R (n-2) -R (a-2))/(n-1), furthermore, for the curved surface display area ②, if the gamma voltage of each color sub-pixel corresponding to the binding point W [0] is 0, the compensation voltage of each color sub-pixel is 0, if the gamma voltage of each color sub-pixel corresponding to the binding point W [1] is 1, the compensation voltage of each color sub-pixel corresponding to the binding point W [1] is 0, as shown in fig. 10, the compensation voltage of each color sub-pixel corresponding to the column data line W [ b ]/(R-1) in the curved surface display area ② is 0), and the compensation voltage of each color sub-pixel corresponding to the binding point W sub-pixel (R-1) is 0, the corresponding to the corresponding compensation voltage (R-sub-pixel (R-1) in the curved surface display area (R-1) (R-1, the compensation voltage of each color sub-1) (R-1) (n-1) (as shown in the curve compensation voltage of the curve display area) is 0, the curve compensation voltage of the curve display area), the curve compensation voltage of the curve display area), the curve display area 3, the curve.
In the embodiment of the present invention, referring to fig. 12, in step S104: after determining the compensation voltage corresponding to each row of data lines in each curved display area according to the first gamma voltage and the second gamma voltage, the method further comprises:
s301: adjusting a second gamma voltage corresponding to each curved surface display area according to the compensation voltage corresponding to each line of data lines in each curved surface display area to obtain an adjusted second gamma voltage;
s302: storing the adjusted second gamma voltage.
In the specific implementation process, the specific implementation process from step S301 to step S302 is as follows:
first, after the compensation voltage corresponding to each row of data lines in each curved surface display area is determined, the initial corresponding second gamma voltage can be adjusted according to the compensation voltage corresponding to the corresponding row of data lines, so that the adjusted second gamma voltage corresponding to the row of data lines is obtained. The adjusted second gamma voltages may then be stored for subsequent determination of corresponding adjusted second gamma voltages directly from the particular column data lines.
Fig. 13 is a distribution diagram of a gamma adjustment testing device corresponding to the curved display panel shown in fig. 3, specifically, a gamma voltage finally determined by the optical probe in the azimuth 1 is a gamma voltage of the flat display area ①, a gamma voltage finally determined by the optical probe in the azimuth 2 is a gamma voltage of the curved display area ②, and a gamma voltage finally determined by the optical probe in the azimuth 3 is a gamma voltage of the curved display area ③.
The gamma curve (curve corresponding to gamma value) of the display panel reflects the relationship between the gray scale and the brightness of the image displayed by the display panel, and there are recognized standards for the gamma curve, such as a gamma value of 2.0 or 2.2. Generally, the gamma curve with the gamma value of 2.2 is selected as the gamma standard curve of the display panel, because the brightness of the image output by the display panel conforming to the standard is approximately linear in human perception, a better display effect can be obtained.
In order to clearly illustrate the technical solution of the present invention, a gamma standard curve with a gamma value of 2.2 is described below:
as shown in fig. 14, the gamma standard curve with a gamma value of 2.2 is schematically illustrated, wherein the X-axis represents a gray level L (whose value ranges from 0 to 255), the Y-axis represents a transmittance (i.e., a normalized luminance) of the display panel, and the functional expression of the gamma standard curve with a gamma value of 2.2 is Y ═ L/2552.2And, each gray level L corresponds to a gray level voltage.
When the gamma curve of the display panel meets the requirement of a gamma standard curve with the gamma value of 2.2, the display panel has better display effect on the brightness and darkness of the image, and the gray scale distribution reflected in human eyes is more uniform. When the gamma curve of the display panel does not meet the requirement of a gamma standard curve with the gamma value of 2.2, the display device does not well display the bright and dark effect of the image, and the gray scale distribution reflected in human eyes is not uniform.
Specifically, in the gamma voltage adjusting method for the curved display panel according to the embodiment of the present invention, as shown in fig. 15, the step S103: determining the second gamma voltage corresponding to each curved display area in the white balance state may specifically be implemented in the following manner:
s401: measuring the brightness value of the corresponding curved surface display area when displaying each gray scale along the direction of the preset angle which is the included angle between the curved surface display area and the plane where the planar display area is located, and generating a corresponding first gamma curve;
s402: and taking the gamma voltage corresponding to the coincidence of the first gamma curve and the gamma standard curve as the second gamma voltage corresponding to the curved surface display area.
In the specific implementation process, the specific implementation process from step S401 to step S402 is as follows:
firstly, controlling a curved surface display area of a curved surface display panel to respectively display gray scale images of 0 gray scale to 255 gray scale by a method of forming a preset angle with an included angle between a plane where the flat surface display area is located, and then detecting the display brightness value of each gray scale image, thereby forming a first gamma curve of a gray scale picture of the curved surface display panel of 0 gray scale to 255 gray scale; then comparing the formed first gamma curve with a gamma standard curve with the gamma value of 2.2, and adjusting the gamma voltage according to the comparison result to realize the adjustment of the display brightness value of each gray-scale picture, so that the first gamma curve of the curved surface display area of the curved surface display panel conforms to the gamma standard curve with the gamma value of 2.2; and taking the corresponding gamma voltage when the first gamma curve of the curved surface display area of the curved surface display panel conforms to the gamma standard curve with the gamma value of 2.2 as the second gamma voltage in the white balance state.
Specifically, in the gamma voltage adjusting method for the curved display panel according to the embodiment of the present invention, as shown in fig. 16, the step S101: determining a first gamma voltage of a flat display area of the curved display panel in a white balance state may specifically be implemented as follows:
s501: measuring the brightness value of the plane display area when displaying each gray scale along the direction vertical to the plane of the plane display area, and generating a corresponding second gamma curve;
s502: and taking the gamma voltage corresponding to the coincidence of the second gamma curve and the gamma standard curve as the first gamma voltage of the plane display area.
It should be noted that, in the gamma voltage adjustment method for the curved display panel provided in the embodiment of the present invention, except that the measurement is performed along the direction perpendicular to the plane of the flat display area, the specific process of determining the first gamma voltage of the flat display area in the white balance state is similar to the specific process of determining the second gamma voltage corresponding to each curved display area in the white balance in step S103, and therefore, the detailed description thereof is omitted here.
Based on the same inventive concept, as shown in fig. 17, an embodiment of the present invention further provides a driving method of a curved display panel, including:
s601: determining a plane display area and a curved surface display area of the curved surface display panel;
s602: calling pre-stored gamma voltages respectively corresponding to the plane display area and the curved surface display area;
s603: and determining a driving signal corresponding to the image to be displayed according to the pre-stored gamma voltages respectively corresponding to the plane display area and the curved surface display area, and driving the image to be displayed to display.
First, a bending angle for representing the bending degree may be determined according to the bending degree of each display area in the curved display panel, and then, a curved display area corresponding to each bending angle is determined, and an area where no bending exists is determined to be a flat display area.
Then, pre-stored gamma voltages respectively corresponding to the plane display area and the curved surface display area are called, and a driving signal corresponding to an image to be displayed is determined according to the pre-stored gamma voltages respectively corresponding to the plane display area and the curved surface display area, so that the image to be displayed is driven to be displayed. For example, the gamma voltages respectively corresponding to the flat display area and the curved display area are gamma aa and gamma ab, when the curved display panel receives an image to be displayed, the area a 'corresponding to the image to be displayed and the flat display area is determined, the area B' corresponding to the image to be displayed and the curved display area is determined, the gamma voltage applied to the area a 'is gamma aa, and the gamma voltage applied to the area B' is gamma ab.
Based on the same inventive concept, referring to fig. 18, an embodiment of the present invention further provides a gamma voltage adjusting apparatus for a curved display panel, including:
a first determining unit 10 for determining a first gamma voltage of a flat display region of the curved display panel in a white balance state when the curved display panel is horizontally placed;
the dividing unit 20 is configured to divide the curved display panel into at least one curved display area according to the bending degree of the curved display panel, where each curved display area is bent by a preset angle with respect to the planar display area;
a second determining unit 30, configured to determine a second gamma voltage corresponding to each curved display area in a white balance state;
and a third determining unit 40, configured to determine a compensation voltage corresponding to each column of data lines in each curved display area according to the first gamma voltage and the second gamma voltage.
Since the problem to be solved by the gamma voltage adjusting device is far from the problem to be solved by the gamma voltage adjusting method, the implementation of the gamma voltage adjusting device provided by the embodiment of the present invention can refer to the implementation of the gamma voltage adjusting method provided by the embodiment of the present invention, and repeated details are not repeated.
In the embodiment of the present invention, the third determining unit 40 is configured to:
taking the first gamma voltage as a gamma voltage of a first column of data lines in the curved display area, wherein the first column of data lines is close to the flat display area;
taking the second gamma voltage as the gamma voltage of an nth column of data lines in the curved surface display area, wherein the nth column of data lines is far away from the plane display area, and n is an integer greater than 2;
determining the gamma voltage of any one column of (n-2) column data lines between the first column of data lines and the nth column of data lines by utilizing an arithmetic of equality according to the gamma voltage of the first column of data lines and the gamma voltage of the nth column of data lines;
and subtracting the first gamma voltage from the gamma voltage of each row of data lines in the curved surface display area to obtain the compensation voltage corresponding to each row of data lines.
In an embodiment of the present invention, the gamma voltage adjusting apparatus further includes:
the adjusting unit is used for adjusting the second gamma voltage corresponding to each curved surface display area according to the compensation voltage corresponding to each row of data lines in each curved surface display area so as to obtain the adjusted second gamma voltage;
and a storage unit for storing the adjusted second gamma voltage.
Based on the same inventive concept, referring to fig. 19, an embodiment of the present invention further provides a driving apparatus for a curved display panel, including:
a fourth determining unit 50 for determining a flat display area and a curved display area of the curved display panel;
a calling unit 60 for calling gamma voltages respectively corresponding to the flat display area and the curved display area, which are stored in advance;
and the driving unit 70 is configured to determine a driving signal corresponding to the image to be displayed according to the gamma voltages respectively corresponding to the planar display area and the curved display area, which are stored in advance, and drive the image to be displayed to display.
Based on the same inventive concept, referring to fig. 20, an embodiment of the present invention further provides a display device, including:
a curved display panel 80, and a driving device 90 as described above.
In the embodiment of the present invention, the curved display panel 80 may be a flexible organic electroluminescent display panel (OLED), and may also be a light emitting diode display panel (LED), a liquid crystal display panel (LCD), an electronic paper display panel, a plasma display panel, an electrophoretic display panel, a quantum dot light emitting display panel (QLED), a micro light emitting diode display panel (mLED), or a light emitting diode display panel (LED) having a curved display area, which is not limited herein.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A gamma voltage adjusting method of a curved display panel is characterized by comprising the following steps:
when the curved surface display panel is horizontally placed, determining a first gamma voltage of a plane display area of the curved surface display panel in a white balance state;
dividing the curved surface display panel into at least one curved surface display area according to the bending degree of the curved surface display panel, wherein each curved surface display area is bent by a preset angle relative to the plane display area;
determining a second gamma voltage corresponding to each curved surface display area in a white balance state;
and determining compensation voltage corresponding to each row of data lines in each curved surface display area according to the first gamma voltage and the second gamma voltage.
2. The method for adjusting gamma voltages according to claim 1, wherein the determining the compensation voltage corresponding to each column of data lines in each curved display area according to the first gamma voltage and the second gamma voltage comprises:
taking the first gamma voltage as a gamma voltage of a first column of data lines in the curved display area, wherein the first column of data lines is close to the flat display area;
taking the second gamma voltage as the gamma voltage of an nth column of data lines in the curved surface display area, wherein the nth column of data lines is far away from the plane display area, and n is an integer greater than 2;
determining the gamma voltage of any one column of (n-2) column data lines between the first column of data lines and the nth column of data lines by utilizing an arithmetic of equality according to the gamma voltage of the first column of data lines and the gamma voltage of the nth column of data lines;
and subtracting the first gamma voltage from the gamma voltage of each row of data lines in the curved surface display area to obtain the compensation voltage corresponding to each row of data lines.
3. The gamma voltage adjustment method of claim 1, wherein after determining the compensation voltage corresponding to each column of data lines in each curved display area according to the first gamma voltage and the second gamma voltage, the method further comprises:
adjusting a second gamma voltage corresponding to each curved surface display area according to the compensation voltage corresponding to each line of data lines in each curved surface display area to obtain an adjusted second gamma voltage;
storing the adjusted second gamma voltage.
4. The method for adjusting gamma voltages of claim 1, wherein determining the second gamma voltage corresponding to each curved display area in the white balance state comprises:
measuring the brightness value of the corresponding curved surface display area when displaying each gray scale along the direction of the preset angle which is the included angle between the curved surface display area and the plane where the planar display area is located, and generating a corresponding first gamma curve;
and taking the gamma voltage corresponding to the coincidence of the first gamma curve and the gamma standard curve as the second gamma voltage corresponding to the curved surface display area.
5. The gamma voltage adjustment method of claim 1, wherein the determining the first gamma voltage of the flat display area of the curved display panel in the white balance state comprises:
measuring the brightness value of the plane display area when displaying each gray scale along the direction vertical to the plane of the plane display area, and generating a corresponding second gamma curve;
and taking the gamma voltage corresponding to the coincidence of the second gamma curve and the gamma standard curve as the first gamma voltage of the plane display area.
6. A method of driving a curved display panel, comprising:
determining a plane display area and a curved surface display area of the curved surface display panel;
calling pre-stored gamma voltages respectively corresponding to the plane display area and the curved surface display area;
and determining a driving signal corresponding to the image to be displayed according to the pre-stored gamma voltages respectively corresponding to the plane display area and the curved surface display area, and driving the image to be displayed to display.
7. A gamma voltage adjusting apparatus of a curved display panel, comprising:
a first determining unit for determining a first gamma voltage of a flat display region of the curved display panel in a white balance state when the curved display panel is horizontally placed;
the dividing unit is used for dividing the curved surface display panel into at least one curved surface display area according to the bending degree of the curved surface display panel, wherein each curved surface display area is bent by a preset angle relative to the plane display area;
the second determining unit is used for determining a second gamma voltage corresponding to each curved surface display area in a white balance state;
and the third determining unit is used for determining compensation voltage corresponding to each row of data lines in each curved surface display area according to the first gamma voltage and the second gamma voltage.
8. The gamma voltage adjustment apparatus of claim 7, wherein the third determination unit is configured to:
taking the first gamma voltage as a gamma voltage of a first column of data lines in the curved display area, wherein the first column of data lines is close to the flat display area;
taking the second gamma voltage as the gamma voltage of an nth column of data lines in the curved surface display area, wherein the nth column of data lines is far away from the plane display area, and n is an integer greater than 2;
determining the gamma voltage of any one column of (n-2) column data lines between the first column of data lines and the nth column of data lines by utilizing an arithmetic of equality according to the gamma voltage of the first column of data lines and the gamma voltage of the nth column of data lines;
and subtracting the first gamma voltage from the gamma voltage of each row of data lines in the curved surface display area to obtain the compensation voltage corresponding to each row of data lines.
9. A driving apparatus for a curved display panel, comprising:
the fourth determining unit is used for determining a plane display area and a curved surface display area of the curved surface display panel;
the calling unit is used for calling the gamma voltages which are stored in advance and respectively correspond to the plane display area and the curved surface display area;
and the driving unit is used for determining a driving signal corresponding to the image to be displayed according to the gamma voltages which are stored in advance and respectively correspond to the plane display area and the curved surface display area, and driving the image to be displayed to display.
10. A display device, comprising:
a curved display panel, and a driving device as claimed in claim 9.
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