CN111653249B - Display control method and device of display panel and electronic equipment - Google Patents

Display control method and device of display panel and electronic equipment Download PDF

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CN111653249B
CN111653249B CN202010484878.2A CN202010484878A CN111653249B CN 111653249 B CN111653249 B CN 111653249B CN 202010484878 A CN202010484878 A CN 202010484878A CN 111653249 B CN111653249 B CN 111653249B
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gray scale
value
display area
gray
scale value
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CN111653249A (en
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马骁骏
王铁钢
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction

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  • General Physics & Mathematics (AREA)
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Abstract

The invention discloses a display control method and device of a display panel and electronic equipment. The method comprises the following steps: determining a first gray scale value of the first display area and a second gray scale value of the second display area according to the first image; determining a gray scale difference value interval corresponding to a first difference value according to the first difference value of the second gray scale value and the first gray scale value; correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value; and controlling the first display area to display the first image by the first corrected gray scale value and the second display area to display the first image by the second gray scale value. According to the embodiment of the invention, the problem that the brightness actually displayed in the first display area is slightly bright or dark can be avoided when the first display area and the second display area of the display panel display different gray-scale images.

Description

Display control method and device of display panel and electronic equipment
Technical Field
The present invention relates to the field of display, and in particular, to a display control method of a display panel, a display control apparatus of a display panel, and an electronic device.
Background
With the rapid development of electronic devices, the requirements of users on screen occupation ratio are higher and higher, so that the comprehensive screen display of the electronic devices is concerned more and more in the industry.
The design of the camera under the screen appears at present, and the camera under the screen is located below the display screen and does not influence the display function of the display screen. In order to ensure the consistency of the display brightness of the area provided with the camera and the area not provided with the camera on the display screen, the same gray scale binding points are adopted to carry out gamma debugging on the two areas. However, when two areas display different grayscale images, the area where the camera is set actually displays a luminance that is slightly brighter or darker.
Disclosure of Invention
The embodiment of the invention provides a display control method of a display panel, a display control device of the display panel and electronic equipment, which can avoid the problem that the actual displayed brightness of a first display area is slightly bright or dark when different gray-scale images are displayed in the first display area and a second display area of the display panel.
In a first aspect, an embodiment of the present invention provides a display control method for a display panel, where the display panel includes a first display area and a second display area, and light transmittance of the first display area is greater than light transmittance of the second display area, the method includes:
determining a first gray scale value of the first display area and a second gray scale value of the second display area according to the first image;
determining a gray scale difference value interval corresponding to a first difference value according to the first difference value of the second gray scale value and the first gray scale value;
correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value;
and controlling the first display area to display the first image by the first corrected gray scale value and the second display area to display the first image by the second gray scale value.
In a possible implementation manner of the first aspect, in the step of correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value, the first corrected gray scale value satisfies the following relation:
Gray′s＝KIR×(Graym-Grays)+Grays
wherein, KIRExpressing the coefficient of influence of pressure drop, GraysDenotes a first Gray level value, Gray'sRepresenting a first modified Gray level, GraymRepresents a second gray scale value; wherein the pressure drop influence coefficient KIRIs determined according to the gray scale difference value of the second display area and the first display area and the gray scale adjustment difference value of the first display area.
In a possible implementation manner of the first aspect, in the step of correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value, the first corrected gray scale value satisfies the following relation:
Figure BDA0002518779410000021
wherein, K'IRExpressing the coefficient of influence of pressure drop, GraysDenotes a first Gray level value, Gray'sRepresenting a first modified Gray level, GraymRepresenting a second gray level value, DBVcurrentRepresenting the current brightness level parameter, DBV, of the display paneltotalA parameter representing a maximum brightness level of the display panel; wherein the pressure drop influence coefficient K'IRThe gray scale adjustment difference value is determined according to the gray scale difference value of the second display area and the first display area, the gray scale adjustment difference value of the first display area and the brightness level parameter of the display panel.
In a possible implementation manner of the first aspect, modifying the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first modified gray scale value includes:
if the first difference is 0, the first gray scale value is not corrected;
and if the first difference is not 0, correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value.
In a possible implementation manner of the first aspect, before determining, according to a first difference between the second gray scale value and the first gray scale value, a gray scale difference interval corresponding to the first difference, the method further includes:
setting a plurality of gray scale difference value intervals and voltage drop influence coefficients corresponding to the gray scale difference value intervals.
In a possible implementation manner of the first aspect, the setting a plurality of gray scale difference intervals and a voltage drop influence coefficient corresponding to each gray scale difference interval includes:
setting a plurality of gray scale difference value intervals;
acquiring a test image and determining a first test gray scale value corresponding to the first display area and a second test gray scale value corresponding to the second display area; wherein, the first test gray scale value is different from the second test gray scale value;
adjusting the first test gray scale value, and controlling the first display area to display the test image according to the adjusted first test gray scale value and the second display area according to the second test gray scale value, so that the display brightness of the first display area meets the preset requirement;
calculating a second difference value between the adjusted first test gray scale value and the first test gray scale value, and a third difference value between the second test gray scale value and the first test gray scale value;
and calculating the ratio of the second difference value to the third difference value to obtain a pressure drop influence coefficient corresponding to the gray scale difference value interval to which the third difference value belongs.
In a possible implementation manner of the first aspect, the setting a plurality of gray scale difference intervals and a voltage drop influence coefficient corresponding to each gray scale difference interval includes:
setting a plurality of gray scale difference intervals, a test brightness level parameter and a maximum brightness level parameter;
acquiring a test image and determining a first test gray scale value corresponding to the first display area and a second test gray scale value corresponding to the second display area; wherein, the first test gray scale value is different from the second test gray scale value;
adjusting the first test gray scale value, and controlling the first display area to display the test image according to the adjusted first test gray scale value and the second display area according to the second test gray scale value, so that the display brightness of the first display area meets the preset requirement;
calculating a second difference value between the adjusted first test gray scale value and the first test gray scale value, and a third difference value between the second test gray scale value and the first test gray scale value;
calculating a first ratio of the second difference value to the third difference value, and a second ratio of the test brightness level parameter to the maximum brightness level parameter;
and calculating the product of the first ratio and the second ratio to obtain a pressure drop influence coefficient corresponding to the gray scale difference interval to which the third difference belongs.
In a possible implementation manner of the first aspect, the method further includes:
acquiring a verification image and determining a first verification gray-scale value corresponding to the first display area and a second verification gray-scale value corresponding to the second display area; the first verification gray scale value is different from the first test gray scale value, the second verification gray scale value is different from the second test gray scale value, and the difference value between the second verification gray scale value and the first verification gray scale value is the same as the gray scale difference value interval to which the third difference value belongs;
obtaining an adjusted first verification gray scale value according to the pressure drop influence coefficient;
controlling the first display area to display a verification image according to the adjusted first verification gray scale value and the second display area according to the second verification gray scale value, and judging whether the display brightness of the first display area meets the preset requirement;
and if the preset requirement is not met, adjusting the voltage drop influence coefficient until the display brightness of the first display area meets the preset requirement based on the adjusted voltage drop influence coefficient.
In a second aspect, an embodiment of the present invention provides a display control apparatus for a display panel, where the display panel includes a first display area and a second display area, and a light transmittance of the first display area is greater than a light transmittance of the second display area, the apparatus includes:
the gray scale determining module is used for determining a first gray scale value of the first display area and a second gray scale value of the second display area according to the first image;
the interval determining module is used for determining a gray scale difference interval corresponding to a first difference value according to the first difference value of the second gray scale value and the first gray scale value;
the correction module is used for performing value correction on the first gray scale according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value;
and the display control module is used for controlling the first display area to display the first image by the first corrected gray scale value and the second display area to display the first image by the second gray scale value.
In a third aspect, an embodiment of the present invention provides an electronic device, which includes the display control apparatus of the display panel according to any one of the second aspect.
According to the display control method of the display panel provided by the embodiment of the invention, firstly, a first gray scale value corresponding to a first display area and a second gray scale value corresponding to a second display area are determined according to a first image to be displayed; and then determining a pressure drop influence coefficient corresponding to the first difference value based on a gray scale difference value interval to which the first difference value of the second gray scale value and the first gray scale value belongs, correcting the first gray scale value based on the pressure drop influence coefficient, and further controlling the first display area to display the first image by using the first corrected gray scale value and the second display area by using the second gray scale value. Through revising first gray level value based on pressure drop influence coefficient, can avoid the pressure drop influence degree of second display area to first display area different, the luminance that the first display area should show is deviate from to the actual display luminance in first display area to avoid the luminance of the actual display in first display area to appear partly bright or partly dark problem, improve display panel's display quality.
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Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 illustrates a schematic top view of a display panel provided in accordance with an embodiment of the invention;
fig. 2 is a flowchart illustrating a display control method of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating a display control apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Fig. 1 illustrates a schematic top view of a display panel provided according to an embodiment of the present invention. As shown in fig. 1, the display panel 100 may include a first display area AA1 and a second display area AA 2. The light transmittance of the first display region AA1 is greater than that of the second display region AA 2. The display panel may be an Organic Light Emitting Diode (OLED) display panel.
Herein, the light transmittance of the first display area AA1 may be 15% or more. To ensure that the light transmittance of the first display area AA1 is greater than 15%, even greater than 40%, or even higher, the light transmittance of at least part of the functional film layer of the display panel 100 in the first display area AA1 in this embodiment may be greater than 80%, or even greater than 90%.
According to the display panel 100 of the embodiment of the invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panel 100 can integrate a photosensitive component on the back of the first display area AA1, and realize the under-screen integration of the photosensitive component such as a camera, and meanwhile, the first display area AA1 can display a picture, so that the display area of the display panel 100 is increased, and the full-screen design of the display device is realized.
The second display area AA2 may at least partially surround the first display area AA 1. In some embodiments, the display panel 100 may further include a non-display area NA and a driving circuit module 10 disposed in the non-display area NA. The driving circuit module 10 may be an Integrated Circuit (IC).
For example, in the first direction X, the first display area AA1 and the driving circuit module 10 are respectively located at two edges of the display panel 100, that is, the first display area AA1 is separated from the driving circuit module 10 by the second display area AA 2. The display panel 100 may further include signal lines 11, wherein the signal lines 11 extend along the first direction X and are spaced apart from each other in the second direction Y. The first direction X intersects the second direction Y. Illustratively, the first direction X and the second direction Y may be perpendicular. The signal line may include a data line, a power supply line (Vdd line), and the like. The signals provided by the driving circuit module 10 are provided to the sub-pixels of the first display area AA1 and the second display area AA2 through signal lines.
For example, due to the voltage Drop (IR Drop) on the signal line 11, gamma adjustment can be performed on the first display area AA1 and the second display area AA2 by using the same gray-scale image, so as to ensure that the first display area AA1 and the second display area AA2 have the same brightness when displaying the same gray-scale image.
Taking the signal line as the data line, the signal provided by the driving circuit module 10 as the data voltage, and the display brightness of the display panel is positively correlated to the data voltage as an example. When the first display area AA1 and the second display area AA2 display different gray-scale images, the voltage drop on the signal line will be changed relative to the case where the two display the same gray-scale image, so that the actual display brightness of the first display area AA1 will deviate from the target brightness.
For example, the gamma adjustment is performed on the first display area AA1 with a gamma value of 2.2 and a target brightness of 430nit corresponding to a gray level of 255. As shown in table 1, the first display area AA1 and the second display area AA2 both display 255 gray-scale images, that is, when the gray-scale difference between the second display area AA2 and the first display area AA1 is 0, the actual display brightness of the first display area AA1 is consistent with the target brightness corresponding to the 255 gray-scale image.
TABLE 1
Gray scale AA1 Gray scale difference AA1 actually shows Brightness nit
255(＝430nit) 0 430(＝255gray)
As shown in table 2, when the first display area AA1 displays a 100-gray-scale image, and the second display area AA2 displays a 255-gray-scale image, that is, when the gray-scale difference between the second display area AA2 and the first display area AA1 is 155, the actual display luminance of the first display area AA1 is 40nit, the target luminance corresponding to the 100 gray-scale image is about 55nit, and the actual display luminance of the first display area AA1 is smaller than the target luminance corresponding to the actual display luminance. Wherein 40nit is about target brightness corresponding to 87 gray levels. This is because the 255 gray scale corresponding to the second display area AA2 is greater than the 100 gray scale corresponding to the first display area AA1, and when the first display area AA1 is gamma-debugged, the first display area AA1 and the second display area AA2 both display 100 gray scale images for debugging. Thus, when the second display area AA2 displays 255 gray scales, the voltage drop on the signal line is larger than that when the second display area AA2 displays 100 gray scales. That is, when the gray scale of the second display area AA2 is greater than the gray scale of the first display area AA1, the voltage drop across the first display area AA1 is increased, so that the actual display brightness of the first display area AA1 is less than the corresponding target brightness.
TABLE 2
Gray scale AA1 Gray scale difference AA1 actually shows Brightness nit
100(≈55nit) 155 40(≈87gray)
As shown in table 3, when the first display area AA1 displays a 200-gray-scale image, and the second display area AA2 displays a 100-gray-scale image, that is, when the gray-scale difference between the second display area AA2 and the first display area AA1 is-100, the actual display luminance of the first display area AA1 is 270nit, the target luminance corresponding to the 200 gray-scale image is about 251nit, and the actual display luminance of the first display area AA1 is greater than the target luminance corresponding thereto. Wherein 270nit is about the target brightness corresponding to 210 gray levels. This is because the 100 gray scale corresponding to the second display area AA2 is smaller than the 200 gray scale corresponding to the first display area AA1, and when the first display area AA1 is gamma-debugged, the first display area AA1 and the second display area AA2 both display 200 gray scale images for debugging. Thus, when the second display area AA2 displays 100 gray scales, the voltage drop on the signal lines is smaller than that when the second display area AA2 displays 200 gray scales. That is, when the gray scale of the second display area AA2 is smaller than the gray scale of the first display area AA1, the voltage drop experienced by the first display area AA1 is reduced, so that the actual display brightness of the first display area AA1 is greater than the corresponding target brightness.
TABLE 3
Gray scale AA1 Gray scale difference AA1 actually shows Brightness nit
200(≈251nit) -100 270(≈210gray)
In summary, when the first display area AA1 and the second display area AA2 display different gray-scale images, the actual display brightness of the first display area AA1 may deviate from the corresponding target brightness, which causes the problem of the first display area AA1 becoming brighter or darker, and affects the overall display effect of the display panel.
In view of the above, embodiments of a display control method for a display panel, a display control device for a display panel, and an electronic apparatus according to the present invention will be described below with reference to the accompanying drawings.
Fig. 2 is a flowchart illustrating a display control method of a display panel according to an embodiment of the present invention. As shown in fig. 2, the display control method of the display panel according to the embodiment of the present invention may include the following steps:
step 110, determining a first gray scale value of a first display area and a second gray scale value of a second display area according to a first image;
step 120, determining a gray scale difference interval corresponding to the first difference value according to the first difference value between the second gray scale value and the first gray scale value;
step 130, correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value;
step 140, the first display area is controlled to display the first image with the first modified gray scale value and the second display area is controlled to display the first image with the second gray scale value.
In this application, the pressure drop influence coefficient may be determined according to a degree of pressure drop influence of the second display area on the first display area. In the different gray scale difference intervals, the second display area has different influence degrees on the voltage drop of the first display area, and the voltage drop influence coefficients corresponding to the different gray scale difference intervals are different.
According to the display control method of the display panel provided by the embodiment of the invention, the first gray-scale value is corrected based on the voltage drop influence coefficient, so that the actual display brightness of the first display area deviates from the brightness which should be displayed by the first display area when the voltage drop influence degree of the second display area on the first display area is different, that is, when the first display area is displayed by the first corrected gray-scale value, the actual display brightness of the first display area is approximately the same as the target brightness corresponding to the first display area, thereby avoiding the problem that the actual display brightness of the first display area is over bright or over dark, and improving the overall display quality of the display panel.
In step 110, the first image is an image to be displayed. The display panel may acquire a first image from an Access Point (AP). Illustratively, the display panel may include a Mobile Industry Processor Interface (MIPI) module, and the image information of the first image is received from the AP terminal through the MIPI Interface module. Further, the image information of the received first image may be data-compressed, and the compressed image data may be stored in a Random Access Memory (RAM) of the display panel.
The display panel may include an image partition processing module that performs partition processing on the first image to determine that the first display area corresponds to a first region of the first image, and the second display area corresponds to a second region of the first image. And identifying a first gray scale value corresponding to the first display area and a second gray scale value corresponding to the second display area.
The first gray scale value may be an average gray scale value of a first area in the first image, and the second gray scale value may be an average gray scale value of a second area in the first image.
In step 120, a difference between the second gray scale value and the first gray scale value is calculated to obtain a first difference value, and a gray scale difference value section to which the first difference value belongs is determined. The gray scale difference interval refers to a range of differences between the second gray scale value and the first gray scale value.
In some optional embodiments, before step 120, a plurality of gray scale difference intervals and voltage drop influence coefficients corresponding to the gray scale difference intervals may be preset. Therefore, the first gray scale value can be corrected by directly utilizing the set range of the order difference value and the pressure drop influence coefficient during display, the calculation process of the display panel during display is reduced, and display delay caused by excessive calculation processes is avoided.
For example, the range of each gray scale difference interval may be set according to actual conditions. For example, each gray-scale difference interval has the same range width, that is, the absolute value of the difference between the maximum value and the minimum value of each gray-scale difference interval is equal.
Illustratively, the gray scale range that the display panel can display is 0-255 gray scales. The gray-scale difference intervals may be set as follows.
-255≤Graym-Grays＜-200→KIR1
-200≤Graym-Grays＜-150→KIR2
-150≤Graym-Grays＜-100→KIR3
-100≤Graym-Grays＜-50→KIR4
-50≤Graym-Grays＜0→KIR5
0＜Graym-Grays＜50→KIR6
……
200≤Graym-Grays＜255→KIRn
Wherein, KIRExpressing the voltage drop influence coefficient, Gray, corresponding to each Gray scale difference intervalsIndicating a first Gray level, Gray, corresponding to the first display areamAnd indicating a second gray scale value corresponding to the second display area. KIR1Expressing the voltage drop influence coefficient, K, corresponding to the gray scale difference interval [ -255, -200)IR2And (4) representing the voltage drop influence coefficient corresponding to the gray scale difference interval (-200, -150), and the like.
The above is merely an example, and the gray scale difference interval may be divided more finely, so as to correct the first gray scale value more accurately.
When the first Gray scale value corresponding to the first display area is the same as the second Gray scale value corresponding to the second display area, Graym-GraysWhen 0 is set, the first grayscale value may not be corrected, and thus, the range of each grayscale difference interval set may not include 0.
For example, the voltage drop influence coefficient corresponding to each gray scale difference interval may be set empirically. And determining the voltage drop influence coefficient corresponding to each gray scale difference interval according to other modes. The present application will describe other ways as follows.
In some optional embodiments, as shown in table 2, when the second gray scale value of the second display area is greater than the first gray scale value of the first display area, the first display area may be darker. The brightness of the first display area should be increased, and the brightness is positively correlated to the gray scale, i.e. the larger the gray scale, the higher the brightness, therefore, the correction can be performed toward increasing the first gray scale value, i.e. the first corrected gray scale value obtained in step 130 should be larger than the first gray scale value. For example, when the second gray scale value of the second display area is greater than the first gray scale value of the first display area, the voltage drop influence coefficient corresponding to each gray scale difference interval may be a value greater than 1, and a product of the first gray scale value and the corresponding voltage drop influence coefficient is taken as the first corrected gray scale value.
As shown in table 3, when the second gray scale value of the second display area is smaller than the first gray scale value of the first display area, the first display area may appear to be brighter. The brightness of the first display area should be decreased, and the brightness is positively correlated to the gray scale, i.e. the larger the gray scale, the greater the brightness, therefore, the correction can be performed toward decreasing the first gray scale value, i.e. the first corrected gray scale value obtained in step 130 should be smaller than the first gray scale value. For example, when the second gray scale value of the second display area is smaller than the first gray scale value of the first display area, the voltage drop influence coefficient corresponding to each gray scale difference value interval may be a numerical value smaller than 1 and larger than 0, and a product of the first gray scale value and the corresponding voltage drop influence coefficient is taken as the first corrected gray scale value.
In some optional embodiments, in step 130, the first modified grayscale value may satisfy the following relation (1):
Gray′s＝KIR×(Graym-Grays)+Grays (1)
wherein, KIRExpressing the coefficient of influence of pressure drop, GraysRepresenting a first Gray level, Grays ′Representing a first modified Gray level, GraymRepresenting a second gray scale value.
Wherein the pressure drop influence coefficient KIRIs determined according to the gray scale difference value of the second display area and the first display area and the gray scale adjustment difference value of the first display area. The present application will hereinafter describe the pressure drop influence coefficient K in the above formula (1)IRThe calculation method of (1).
According to the formula (1) provided by the embodiment of the invention, the first correction gray-scale value can be accurately obtained.
In some optional embodiments, in step 130, the first modified grayscale value may satisfy the following relation (2):
Figure BDA0002518779410000111
wherein, K'IRExpressing the coefficient of influence of pressure drop, GraysDenotes a first Gray level value, Gray'sRepresenting a first modified Gray level, GraymRepresenting a second gray level value, DBVcurrentRepresenting the current brightness level parameter, DBV, of the display paneltotalRepresenting the maximum brightness level parameter of the display panel.
Wherein the pressure drop influence coefficient K'IRThe gray scale adjustment difference value is determined according to the gray scale difference value of the second display area and the first display area, the gray scale adjustment difference value of the first display area and the brightness level parameter of the display panel. Pressure drop influence coefficient K 'in the above formula (2)'IRSince the influence of the luminance level parameter of the display panel may be considered in the determination, the current luminance level parameter and the maximum luminance level parameter of the display panel are considered in the formula (2), thereby obtaining more accurate Gray 'at the first corrected Gray level value's. This application will be described belowThe pressure drop influence coefficient K 'in the formula (2)'IRThe calculation method of (1).
Illustratively, the brightness level parameter may be a value from "000" to "FFF" in hexadecimal notation. The different brightness level parameters may indicate different display brightness levels when the same picture is displayed. For example, the brightness level parameter is "FFF", which may represent the maximum display brightness level corresponding to the brightest state; the brightness level parameter is "000" and may represent the minimum display brightness level corresponding to the darkest state. The luminance level parameter corresponding to the same picture ranges from "000" to "FFF".
Illustratively, the brightness level parameter may specifically be a 51 register value. The brightness level parameter may be understood as a brightness bar of the display panel. For example, when the display panel displays a screen, the luminance bar may be slid, the position of the luminance bar may be different, and the luminance of the displayed screen may be different.
According to the embodiment of the invention, the influence of the brightness grade parameter on the actual display brightness is taken into consideration, the first gray-scale value can be corrected more accurately, and the actual display brightness of the first display area and the target brightness corresponding to the first display area are further ensured to be consistent.
Illustratively, a hexadecimal DBV may be usedcurrentNumerical value and DBVtotalThe values were converted into decimal values, and the first corrected Gray scale value Gray 'was calculated according to the above formula (2)'s。
In some optional embodiments, step 130 may specifically include: if the first difference is 0, the first gray scale value is not corrected; and if the first difference is not 0, correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value.
As described above, since there is a voltage drop on the signal line, the gamma adjustment can be performed on the first display area and the second display area by using the same gray-scale image. That is, when the gamma adjustment is performed on the display panel, the first gray-scale value of the first display area is the same as the second gray-scale value of the second display area, and in this case, the actual display brightness of the first display area does not deviate. Therefore, when the first gray scale value is the same as the second gray scale value, the first gray scale value does not need to be corrected.
In other embodiments, the step of setting the voltage drop influence coefficient corresponding to each gray scale difference interval may include:
step 150, setting a plurality of gray scale difference intervals.
Step 151, acquiring a test image and determining a first test gray scale value corresponding to the first display area and a second test gray scale value corresponding to the second display area; wherein, the first test gray scale value is different from the second test gray scale value.
And 152, adjusting the first test gray scale value, and controlling the first display area to display the test image according to the adjusted first test gray scale value and the second display area according to the second test gray scale value, so that the display brightness of the first display area meets the preset requirement.
Step 153, calculating a second difference between the adjusted first test gray scale value and the first test gray scale value, and a third difference between the second test gray scale value and the first test gray scale value.
Step 154, calculating the ratio of the second difference to the third difference to obtain the voltage drop influence coefficient corresponding to the gray scale difference interval to which the third difference belongs.
Step 155, the voltage drop influence coefficient is used as the voltage drop influence coefficient corresponding to the gray scale difference interval to which the third difference belongs.
For example, the pressure drop influence coefficient K in the above formula (1) may be calculated according to the following formula (3)IR：
Figure BDA0002518779410000131
Wherein, Gray1Denotes the first test Gray'1Indicating the adjusted first test Gray level, Gray2Representing a second test gray scale value. The Gray level adjustment difference value of the first display area is Gray'1-Gray1。
Illustratively, a certain number of completed OTP burns may be selectedAnd determining the pressure drop influence coefficient corresponding to the gray scale difference interval by the recorded sample module. For example, the structures and parameters of the sample modules are the same. For any gray scale difference interval, a plurality of test images can be selected. For example, the Gray scale difference interval is [50, 100 ], and for the first test image, the first test Gray scale value Gray of the first display region1The Gray scale is 65 Gray scale, and the second display region corresponds to the second test Gray scale value Gray2The Gray scale difference between the second display area and the first display area is 95 if the Gray scale is 160, and Gray is adjusted if the display brightness of the first display area does not meet the requirement1Obtaining qualified Gray'1(ii) a For the second test image, the first test Gray scale value Gray of the first display region1The Gray scale is 70 Gray scale, and the second test Gray scale value Gray corresponding to the second display region2160 gray scale, etc.
When a plurality of test images are used, the values of the pressure drop influence coefficients corresponding to the test images may be different, and the average value of the plurality of pressure drop influence coefficients can be used as the final pressure drop influence coefficient. It should be appreciated that the greater the number of test images, the more accurate the resulting pressure drop impact coefficient.
For example, the preset requirement may be a target brightness corresponding to the first display area, that is, a target brightness corresponding to the first test gray scale value.
And determining the voltage drop influence coefficient according to the specific test image, so that the determined voltage drop influence coefficient is more consistent with the actual condition of the display panel, and the obtained voltage drop influence coefficient is more accurate.
In other optional embodiments, the step of setting the voltage drop influence coefficient corresponding to each gray scale difference interval may include:
step 160, setting a plurality of gray scale difference intervals, test brightness level parameters and maximum brightness level parameters.
Step 161, acquiring a test image and determining a first test gray scale value corresponding to the first display area and a second test gray scale value corresponding to the second display area; wherein, the first test gray scale value is different from the second test gray scale value.
And step 162, adjusting the first test gray scale value, and controlling the first display area to display the test image according to the adjusted first test gray scale value and the second display area according to the second test gray scale value, so that the display brightness of the first display area meets the preset requirement.
Step 163, calculate a second difference between the adjusted first test gray scale value and the first test gray scale value, and a third difference between the second test gray scale value and the first test gray scale value.
Step 164, calculating a ratio of the second difference to the third difference to obtain a voltage drop influence coefficient corresponding to the gray scale difference interval to which the third difference belongs;
step 165, taking the product of the ratio of the test brightness level parameter to the maximum brightness level parameter and the voltage drop influence coefficient as the voltage drop influence coefficient corresponding to the gray scale difference interval to which the third difference belongs.
It will be appreciated that steps 160 to 165 differ from steps 150 to 155 only in step 160 and step 165, respectively, from step 150. Namely, the present embodiment considers the influence of the brightness level parameter on the voltage drop influence coefficient.
According to the embodiment of the invention, the influence of the brightness grade parameter on the actual display brightness is considered, and the voltage drop influence coefficient corresponding to each gray scale difference value interval can be more accurately determined.
For example, the pressure drop influence coefficient K 'in the above formula (2) may be calculated according to the following formula (4)'IR：
Figure BDA0002518779410000141
Wherein, Gray1Denotes the first test Gray'1Indicating the adjusted first test Gray level, Gray2Representing a second test gray level, DBVsRepresenting a test brightness level parameter, DBVtotalRepresenting a maximum brightness level parameter.
As described above, the brightness level parameter may specifically be a 51 register value. The register value is changed 51 in size, i.e. the test brightness level parameter is changed in size.
For example, a Gray level difference interval of [50, 100 ], different Gray can be used1And Gray2And setting different DBVssAnd adjusting Gray1To yield Gray'1Rendering the first display region to Gray'1During display, the actual display brightness of the first display area meets the preset requirement, and further, a pressure drop influence coefficient K 'corresponding to a gray scale difference interval of [50, 100 ] can be obtained through calculation according to the formula (2)'IR。
Illustratively, different Gray values are used for the same Gray scale difference interval1、Gray2And DBVs. Possibly obtaining a plurality of K'IRNumerical values, K 'may be calculated'IRAnd taking the average value as a pressure drop influence coefficient corresponding to the gray scale difference interval.
In some optional embodiments, the display control method of the display panel provided in the embodiments of the present invention may further include:
step 171, obtaining a verification image and determining a first verification gray scale value corresponding to the first display area and a second verification gray scale value corresponding to the second display area; the first verification gray scale value is different from the first test gray scale value, the second verification gray scale value is different from the second test gray scale value, and the difference value between the second verification gray scale value and the first verification gray scale value is the same as the gray scale difference value interval to which the third difference value belongs.
And 172, obtaining the adjusted first verification gray scale value according to the pressure drop influence coefficient.
Step 173, controlling the first display area to display the verification image according to the adjusted first verification gray scale value and the second display area according to the second verification gray scale value, and determining whether the display brightness of the first display area meets the preset requirement.
In step 174, if the preset requirement is not met, the voltage drop influence coefficient is adjusted until the display brightness of the first display area based on the adjusted voltage drop influence coefficient meets the preset requirement.
In step 171, for example, for a Gray level difference interval of [50, 100 ], a plurality of different Gray sets are selected1And Gray2Correspondingly, the first and second verification Gray-scale values corresponding to the verification image are different from the selected multiple groups of Gray1And Gray2Different from each other, but the difference between the second verification gray-scale value and the first verification gray-scale value corresponding to the verification image is still within the gray-scale difference interval [50, 100 ].
For example, in step 172, the adjusted first verification gray scale value may be calculated according to the above formula (1) or (2). In step 173, the preset requirement may be a target brightness corresponding to the first verification gray scale value.
According to the embodiment of the invention, the accuracy of the obtained voltage drop influence coefficient is verified through the verification image, and each gray scale difference value area can be ensured to correspond to a relatively correct voltage drop influence coefficient.
Fig. 3 is a schematic structural diagram illustrating a display control apparatus of a display panel according to an embodiment of the present invention. As shown in fig. 3, the display control apparatus of the display panel according to the embodiment of the present invention includes the following modules:
a gray scale determining module 301, configured to determine a first gray scale value of the first display area and a second gray scale value of the second display area according to the first image;
an interval determining module 302, configured to determine a gray scale difference interval corresponding to a first difference value according to the first difference value between the second gray scale value and the first gray scale value;
the correction module 303 is configured to perform value correction on the first gray scale according to the voltage drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value;
the display control module 304 is configured to control the first display area to display the first image with the first modified gray scale value and the second display area to display the second image with the second gray scale value.
According to the display control device of the display panel provided by the embodiment of the invention, the first gray-scale value is corrected based on the voltage drop influence coefficient, so that the actual display brightness of the first display area deviates from the brightness which should be displayed by the first display area when the voltage drop influence degree of the second display area on the first display area is different, that is, when the first display area is displayed by the first corrected gray-scale value, the actual display brightness of the first display area is approximately the same as the target brightness corresponding to the first display area, thereby avoiding the problem that the brightness actually displayed by the first display area is over bright or over dark, and improving the overall display quality of the display panel.
In some optional embodiments, the modification module 303 is specifically configured to: calculating a first corrected gray scale value according to the following formula (1):
Gray′s＝KIR×(Graym-Grays)+Grays (1)
wherein, KIRExpressing the coefficient of influence of pressure drop, GraysDenotes a first Gray level value, Gray'sRepresenting a first modified Gray level, GraymRepresents a second gray scale value; wherein the pressure drop influence coefficient KIRIs determined according to the gray scale difference value of the second display area and the first display area and the gray scale adjustment difference value of the first display area.
In some optional embodiments, the modification module 303 is specifically configured to: calculating a first corrected gray scale value according to the following formula (2):
Figure BDA0002518779410000171
wherein, K'IRExpressing the coefficient of influence of pressure drop, GraysDenotes a first Gray level value, Gray'sRepresenting a first modified Gray level, GraymRepresenting a second gray level value, DBVcurrentRepresenting the current brightness level parameter, DBV, of the display paneltotalA parameter representing a maximum brightness level of the display panel; wherein the pressure drop influence coefficient K'IRThe gray scale adjustment difference value is determined according to the gray scale difference value of the second display area and the first display area, the gray scale adjustment difference value of the first display area and the brightness level parameter of the display panel.
According to the formula provided by the embodiment of the invention, the first correction gray-scale value can be accurately obtained.
In some optional embodiments, the modification module 303 is specifically configured to:
if the first difference is 0, the first gray scale value is not corrected;
and if the first difference is not 0, correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value.
As described above, since there is a voltage drop on the signal line, the gamma adjustment can be performed on the first display area and the second display area by using the same gray-scale image. That is, when the gamma adjustment is performed on the display panel, the first gray-scale value of the first display area is the same as the second gray-scale value of the second display area, and in this case, the actual display brightness of the first display area does not deviate. Therefore, when the first gray scale value is the same as the second gray scale value, the first gray scale value does not need to be corrected.
In some optional embodiments, the apparatus may further comprise a parameter setting module configured to:
setting a plurality of gray scale difference value intervals and voltage drop influence coefficients corresponding to the gray scale difference value intervals.
Therefore, the first gray scale value can be corrected by directly utilizing the set range of the order difference value and the pressure drop influence coefficient during display, the calculation process of the display panel during display is reduced, and display delay caused by excessive calculation processes is avoided.
In some optional embodiments, the parameter setting module is specifically configured to:
setting a plurality of gray scale difference value intervals;
acquiring a test image and determining a first test gray scale value corresponding to the first display area and a second test gray scale value corresponding to the second display area; wherein, the first test gray scale value is different from the second test gray scale value;
adjusting the first test gray scale value, and controlling the first display area to display the test image according to the adjusted first test gray scale value and the second display area according to the second test gray scale value, so that the display brightness of the first display area meets the preset requirement;
calculating a second difference value between the adjusted first test gray scale value and the first test gray scale value, and a third difference value between the second test gray scale value and the first test gray scale value;
and calculating the ratio of the second difference value to the third difference value to obtain a pressure drop influence coefficient corresponding to the gray scale difference value interval to which the third difference value belongs.
And determining the voltage drop influence coefficient according to the specific test image, so that the determined voltage drop influence coefficient is more consistent with the actual condition of the display panel, and the obtained voltage drop influence coefficient is more accurate.
In some optional embodiments, the parameter setting module is specifically configured to:
setting a plurality of gray scale difference intervals, a test brightness level parameter and a maximum brightness level parameter;
acquiring a test image and determining a first test gray scale value corresponding to the first display area and a second test gray scale value corresponding to the second display area; wherein, the first test gray scale value is different from the second test gray scale value;
adjusting the first test gray scale value, and controlling the first display area to display the test image according to the adjusted first test gray scale value and the second display area according to the second test gray scale value, so that the display brightness of the first display area meets the preset requirement;
calculating a second difference value between the adjusted first test gray scale value and the first test gray scale value, and a third difference value between the second test gray scale value and the first test gray scale value;
calculating a first ratio of the second difference to the third difference, and a second ratio of the test brightness level parameter to the maximum brightness level parameter
And calculating the product of the first ratio and the second ratio to obtain a pressure drop influence coefficient corresponding to the gray scale difference interval to which the third difference belongs.
According to the embodiment of the invention, the influence of the brightness grade parameter on the actual display brightness is considered, and the voltage drop influence coefficient corresponding to each gray scale difference value interval can be more accurately determined.
In some optional embodiments, the apparatus may further comprise a verification module for:
acquiring a verification image and determining a first verification gray-scale value corresponding to the first display area and a second verification gray-scale value corresponding to the second display area; the first verification gray scale value is different from the first test gray scale value, the second verification gray scale value is different from the second test gray scale value, and the difference value between the second verification gray scale value and the first verification gray scale value is the same as the gray scale difference value interval to which the third difference value belongs;
obtaining an adjusted first verification gray scale value according to the pressure drop influence coefficient;
controlling the first display area to display a verification image according to the adjusted first verification gray scale value and the second display area according to the second verification gray scale value, and judging whether the display brightness of the first display area meets the preset requirement;
and if the display brightness does not meet the preset requirement, adjusting the voltage drop influence coefficient until the display brightness of the corrected first display area based on the adjustment meets the preset requirement.
According to the embodiment of the invention, the accuracy of the obtained voltage drop influence coefficient is verified through the verification image, and each gray scale difference value area can be ensured to correspond to a relatively correct voltage drop influence coefficient.
For example, each functional module of the display control apparatus of the display panel provided by the embodiment of the present invention may be integrated in a driving IC of the display panel.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
An embodiment of the present invention further provides an electronic device, which includes the display control apparatus of the display panel according to any of the above embodiments, and therefore, the electronic device also has the beneficial effects of the display control apparatus of the display panel according to any of the above embodiments, and details are not repeated herein.
The electronic device may be a mobile phone, a computer, a wearable device, etc., which is not limited in this respect.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims (10)

1. A display control method of a display panel is characterized in that the display panel comprises a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the method comprises the following steps:
determining a first gray scale value of the first display area and a second gray scale value of the second display area according to the first image;
determining a gray scale difference value interval corresponding to a first difference value according to the first difference value of the second gray scale value and the first gray scale value;
correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value;
and controlling the first display area to display the first image according to the first corrected gray scale value and the second display area to display the first image according to the second gray scale value.
2. The method according to claim 1, wherein in the step of correcting the first gray scale value according to the voltage drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value, the first corrected gray scale value satisfies the following relation:
Gray′s＝KIR×(Graym-Grays)+Grays
wherein, KIRRepresenting said pressure drop influence coefficient, GraysRepresents the first Gray level value, Gray'sRepresenting said first modified Gray level, GraymRepresents the second gray scale value; wherein the pressure drop influence coefficient KIRIs determined according to the gray scale difference value of the second display area and the first display area and the gray scale adjustment difference value of the first display area.
3. The method according to claim 1, wherein in the step of correcting the first gray scale value according to the voltage drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value, the first corrected gray scale value satisfies the following relation:
Figure FDA0002926946310000011
wherein, K'IRRepresenting said pressure drop influence coefficient, GraysRepresents the first Gray level value, Gray'sRepresenting said first modified Gray level, GraymRepresenting said second gray level value, DBVcurrentRepresenting a current brightness level parameter, DBV, of the display paneltotalA parameter representing a maximum brightness level of the display panel; wherein the pressure drop influence coefficient K'IRThe gray scale adjustment difference value is determined according to the gray scale difference value of the second display area and the first display area, the gray scale adjustment difference value of the first display area and the brightness level parameter of the display panel.
4. The method according to any one of claims 1 to 3, wherein the correcting the first gray scale value according to the voltage drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value comprises:
if the first difference is 0, not correcting the first gray scale value;
and if the first difference is not 0, correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value.
5. The method of claim 1, wherein before determining a gray scale difference interval corresponding to the first difference value according to the first difference value between the second gray scale value and the first gray scale value, the method further comprises:
and setting a plurality of gray scale difference value intervals and the voltage drop influence coefficients corresponding to the gray scale difference value intervals respectively.
6. The method of claim 5, wherein the setting the plurality of gray scale difference intervals and the voltage drop influence coefficients corresponding to the gray scale difference intervals comprises:
setting a plurality of gray scale difference value intervals;
acquiring a test image and determining a first test gray scale value corresponding to the first display area and a second test gray scale value corresponding to the second display area; wherein the first test gray scale value is different from the second test gray scale value;
adjusting the first test gray scale value, and controlling the first display area to display the test image according to the adjusted first test gray scale value and the second display area according to the second test gray scale value, so that the display brightness of the first display area meets the preset requirement;
calculating a second difference value between the adjusted first test gray scale value and the adjusted first test gray scale value, and a third difference value between the adjusted second test gray scale value and the adjusted first test gray scale value;
and calculating the ratio of the second difference value to the third difference value to obtain a voltage drop influence coefficient corresponding to the gray scale difference value interval to which the third difference value belongs.
7. The method of claim 5, wherein the setting the plurality of gray scale difference intervals and the voltage drop influence coefficients corresponding to the gray scale difference intervals comprises:
setting a plurality of gray scale difference value intervals, test brightness level parameters and maximum brightness level parameters;
acquiring a test image and determining a first test gray scale value corresponding to the first display area and a second test gray scale value corresponding to the second display area; wherein the first test gray scale value is different from the second test gray scale value;
adjusting the first test gray scale value, and controlling the first display area to display the test image according to the adjusted first test gray scale value and the second display area according to the second test gray scale value, so that the display brightness of the first display area meets the preset requirement;
calculating a second difference value between the adjusted first test gray scale value and the adjusted first test gray scale value, and a third difference value between the adjusted second test gray scale value and the adjusted first test gray scale value;
calculating a first ratio of the second difference to the third difference and a second ratio of the test brightness level parameter to the maximum brightness level parameter;
and calculating the product of the first ratio and the second ratio to obtain a pressure drop influence coefficient corresponding to the gray scale difference interval to which the third difference belongs.
8. The method according to claim 6 or 7, characterized in that the method further comprises:
acquiring a verification image and determining a first verification gray-scale value corresponding to the first display area and a second verification gray-scale value corresponding to the second display area; the first verification gray level value is different from the first test gray level value, the second verification gray level value is different from the second test gray level value, and the difference value between the second verification gray level value and the first verification gray level value is the same as the gray level difference interval to which the third difference value belongs;
obtaining an adjusted first verification gray scale value according to the pressure drop influence coefficient;
controlling the first display area to display the verification image according to the adjusted first verification gray-scale value and the second display area according to the second verification gray-scale value, and judging whether the display brightness of the first display area meets the preset requirement;
and if the preset requirement is not met, adjusting the voltage drop influence coefficient until the display brightness of the first display area meets the preset requirement based on the adjusted voltage drop influence coefficient.
9. A display control apparatus of a display panel, the display panel including a first display area and a second display area, a light transmittance of the first display area being greater than a light transmittance of the second display area, the apparatus comprising:
the gray scale determining module is used for determining a first gray scale value of the first display area and a second gray scale value of the second display area according to the first image;
the interval determining module is used for determining a gray scale difference interval corresponding to a first difference value according to the first difference value of the second gray scale value and the first gray scale value;
the correction module is used for correcting the first gray scale value according to the pressure drop influence coefficient corresponding to the gray scale difference interval to obtain a first corrected gray scale value;
and the display control module is used for controlling the first display area to display the first image according to the first corrected gray scale value and the second display area to display the first image according to the second gray scale value.
10. An electronic device characterized by comprising the display panel according to claim 9.
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