CN117198220B - Driving method and device of display panel, display module and electronic equipment - Google Patents
Driving method and device of display panel, display module and electronic equipment Download PDFInfo
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Abstract
The application relates to a driving method and device of a display panel, a display module and electronic equipment, wherein the method comprises the following steps: acquiring an input image; determining a brightness level of the input image; adjusting luminance components of pixels in each image partition on HSV color space based on the luminance levels, respectively, wherein the input image is divided into-dividing said image into sections; determining target driving currents corresponding to all sub-pixels of the display panel based on the brightness components adjusted by all pixels in the input image; and driving the display panel to display the input image by using the target driving current corresponding to each sub-pixel. Therefore, the quality of the image is not affected under the condition of reducing the display power consumption of the display panel.
Description
Technical Field
The present disclosure relates to the field of display panels, and in particular, to a driving method and apparatus for a display panel, a display module, and an electronic device.
Background
An Organic Light-Emitting Diode (OLED) is widely used in mobile terminals as a next-generation display device with great potential, with high image quality and low cost.
Meanwhile, the OLED display screen is one of high-energy-consumption components in the mobile terminal, and the display power consumption of the OLED display screen accounts for a large part of the power consumption of the whole mobile terminal, so that the optimization of the display power consumption of the OLED display screen becomes a problem to be focused in low-power consumption research.
Disclosure of Invention
The application provides a driving method and device of a display panel, a display module and electronic equipment, and aims to solve the problem of how to reduce display power consumption of an OLED display screen without affecting quality of the OLED display screen on images.
In a first aspect, the present application provides a driving method of a display panel, the method including:
acquiring an input image;
determining a brightness level of the input image;
adjusting luminance components of pixels in each image partition on HSV color space based on the luminance levels, respectively, wherein the input image is divided into-dividing said image into sections;
determining target driving currents corresponding to all sub-pixels of the display panel based on the brightness components adjusted by all pixels in the input image;
and driving the display panel to display the input image by using the target driving current corresponding to each sub-pixel.
In a possible implementation manner, the determining the brightness level of the input image includes:
Converting the input image into an HSV color space to obtain brightness components of all pixels in the input image on the HSV color space;
determining first average luminance components of all pixels in the input image, and determining second average luminance components of pixels in each of the image partitions, respectively;
a brightness level of the input image is determined based on the first average brightness component and each of the second average brightness components.
In a possible implementation manner, the determining the brightness level of the input image based on the first average brightness component and each of the second average brightness components includes:
determining a maximum value and a minimum value in each of the second average luminance components, and determining a difference between the maximum value and the minimum value;
determining that the brightness level of the input image is a first level in the case that the difference is not less than a preset brightness difference threshold and the first average brightness component is not less than a preset brightness component threshold;
and determining a brightness level of the input image as a second level in the case that the difference is smaller than the brightness difference threshold or the first average brightness value is smaller than the brightness component threshold.
In a possible implementation, the brightness level includes a first level; the adjusting the brightness components of the pixels in each image partition on the HSV color space based on the brightness levels comprises:
converting the input image into an HSV color space under the condition that the brightness level of the input image is the first level, and obtaining brightness components of pixels in the input image on the HSV color space;
determining a second average luminance component of pixels in each of said image partitions;
sequencing the image partitions according to the sequence from the high average brightness value to the low average brightness value to obtain an image partition sequence;
based on the followingDetermining the brightness reduction proportion of each image partition according to the ordering position of each image partition in the image partition sequence and a first preset proportion value;
and respectively reducing the brightness components of the pixels in each image partition on the HSV color space according to the corresponding brightness reduction proportion.
In a possible implementation manner, the determining the brightness reduction ratio of each image partition based on the number of image partitions in the input image, the ordering position of each image partition in the image partition sequence, and a first preset ratio value includes:
For each image partition, calculating the number of the image partitions in the input image, the ordering positions of the image partitions in the image partition sequence and a first preset proportion value according to a preset formula to obtain the brightness reduction proportion of the image partition; the preset formula is as follows:
wherein->For the +.>The luminance reduction ratio of each image partition,and the first preset proportion value is obtained.
In a possible implementation, the brightness level includes a second level; the adjusting the brightness components of the pixels in each image partition on the HSV color space based on the brightness levels comprises:
and reducing the brightness components of the pixels in each image partition on the HSV color space according to a second preset proportion value under the condition that the brightness level of the input image is the second level.
In a possible implementation manner, the determining, based on the adjusted brightness component of each pixel in the input image, a target driving current corresponding to each sub-pixel of the display panel includes:
the following processing is performed for each pixel in the input image:
determining a gray scale value of the pixel in an RGB color space based on the adjusted brightness component of the pixel;
Searching a preset corresponding relation between the gray scale of the sub-pixel and the driving current based on the gray scale value of the pixel in the RGB color space;
and determining the target driving current of each sub-pixel corresponding to the pixel based on the search result.
In a possible implementation, the input image is divided into the following waysEach of the image partitions:
and starting from the center of the input image, dividing the input image according to the back character form to obtain N image partitions.
In a second aspect, the present application provides a driving apparatus of a display panel, the apparatus comprising:
the image acquisition module is used for acquiring an input image;
a brightness determining module for determining a brightness level of the input image;
a brightness adjustment module for adjusting brightness components of pixels in each image partition based on the brightness levels, wherein the input image is divided into-dividing said image into sections;
the current determining module is used for determining target driving currents corresponding to all sub-pixels of the display panel based on the brightness components adjusted by all pixels in the input image;
and the driving module is used for driving the display panel by using the target driving current corresponding to each sub-pixel so as to display the input image.
In a possible implementation manner, the brightness determining module includes:
a conversion unit, configured to convert the input image into an HSV color space, and obtain a luminance component of each pixel in the input image in the HSV color space;
an average value determining unit configured to determine first average luminance components of all pixels in the input image, and determine second average luminance components of pixels in each of the image partitions, respectively;
a level determining unit configured to determine a luminance level of the input image based on the first average luminance component and each of the second average luminance components.
In a possible embodiment, the level determining unit includes:
a reference value determination subunit configured to determine a maximum value and a minimum value in each of the second average luminance components, and determine a difference between the maximum value and the minimum value;
a determining subunit, configured to determine, when the difference is not less than a preset luminance difference threshold and the first average luminance component is not less than a preset luminance component threshold, that a luminance level of the input image is a first level;
and determining a brightness level of the input image as a second level in the case that the difference is smaller than the brightness difference threshold or the first average brightness value is smaller than the brightness component threshold.
In a possible implementation, the brightness level includes a first level; the brightness adjustment includes:
a conversion unit, configured to convert the input image into an HSV color space, and obtain a luminance component of each pixel in the input image in the HSV color space, when the luminance level of the input image is the first level;
an average value determining unit configured to determine a second average luminance component of pixels in each of the image partitions;
the sorting unit is used for sorting the image partitions according to the order of the second average brightness value from the large value to the small value to obtain an image partition sequence;
a drop ratio determining unit for determining the drop ratio based on theDetermining the brightness reduction proportion of each image partition according to the ordering position of each image partition in the image partition sequence and a first preset proportion value;
and the adjusting unit is used for respectively reducing the brightness components of the pixels in each image partition on the HSV color space according to the corresponding brightness reduction proportion.
In a possible embodiment, the drop ratio determining unit is specifically configured to:
for each image partition, calculating the number of the image partitions in the input image, the ordering positions of the image partitions in the image partition sequence and a first preset proportion value according to a preset formula to obtain the brightness reduction proportion of the image partition; the preset formula is as follows:
Wherein->For the +.>The luminance reduction ratio of each image partition,and the first preset proportion value is obtained.
In a possible implementation, the brightness level includes a second level; the brightness adjustment module is specifically configured to:
and reducing the brightness components of the pixels in each image partition on the HSV color space according to a second preset proportion value under the condition that the brightness level of the input image is the second level.
In a possible implementation manner, the current determining module includes:
an RGB gray-scale determining unit configured to determine, for each pixel in the input image, a gray-scale value of the pixel in an RGB color space based on the luminance component adjusted by the pixel;
the searching unit is used for searching the corresponding relation between the preset sub-pixel gray scale and the driving current based on the gray scale value of the pixel in the RGB color space; and determining the target driving current of each sub-pixel corresponding to the pixel based on the search result.
In one possible embodiment, the apparatus comprises:
a partition dividing module for dividing the input image into the following modesEach of the imagesPartitioning:
And starting from the center of the input image, dividing the input image according to the back character form to obtain N image partitions.
In a third aspect, the present application provides a display module, including a display panel and a control unit;
the control unit acquires an input image;
determining a brightness level of the input image;
adjusting luminance components of pixels in each image partition based on the luminance levels, respectively, wherein the input image is divided into-dividing said image into sections;
determining a target driving current corresponding to each sub-pixel of the display panel based on the adjusted brightness component of each pixel in the input image;
and driving the display panel to display the input image by using the target driving current corresponding to each sub-pixel.
In a fourth aspect, the present application provides an electronic device, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor coupled to the at least one bus; at least one memory coupled to the at least one bus, wherein the processor is configured to:
acquiring an input image;
Determining a brightness level of the input image;
adjusting luminance components of pixels in each image partition based on the luminance levels, respectively, wherein the input image is divided into-dividing said image into sections;
determining target driving currents corresponding to all sub-pixels of the display panel based on the brightness components adjusted by all pixels in the input image;
and driving the display panel to display the input image by using the target driving current corresponding to each sub-pixel.
In a fifth aspect, the present application further provides a computer storage medium storing computer-executable instructions for performing the driving method of the display panel according to any one of the above-described applications.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: according to the method provided by the embodiment of the application, the brightness level of the input image is determined, the brightness components of the pixels in each image partition on the HSV color space are respectively adjusted based on the brightness level, the target driving currents corresponding to the sub-pixels of the display panel are determined based on the brightness components of the pixels in the input image, the target driving currents corresponding to the sub-pixels are used for driving the display panel to display the input image, the purpose of reducing the display power consumption is achieved by adjusting the brightness of the input image, in the scheme, the brightness of the input image is adjusted through the original brightness level of the input image, the brightness of the input image is not adjusted according to the original brightness level of the input image, the quality of the image can be effectively ensured while the display power consumption is reduced, the watching effect of human eyes on the display image is prevented from being influenced due to the brightness reduction, and in the scheme, the brightness of the partitions are adjusted differently, namely, the brightness of different image partitions are adjusted differently, the image is ensured to keep high contrast, and the loss of the final output image compared with the original image is reduced to the minimum.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a flowchart of an embodiment of a driving method of a display panel according to an embodiment of the present application;
FIG. 2 is an example of dividing an input image into a plurality of image partitions;
FIG. 3 is a diagram showing the correspondence between gray scale values and driving currents in RGB color space;
FIG. 4 is a graph of luminance variation at fixed saturation in the HSV color space;
FIG. 5 is a flowchart of another embodiment of a driving method of a display panel according to the present disclosure;
FIG. 6 is a flowchart of a particular implementation of adjusting luminance components of pixels in each image partition on an HSV color space based on a luminance level, respectively, in the case where the luminance level of an input image is a first level;
fig. 7 is a flowchart of an embodiment of a driving method of a display panel according to still another embodiment of the present application;
fig. 8 is a block diagram of an embodiment of a driving apparatus for a display panel according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
In order to solve the technical problem of how to reduce the display power consumption of an OLED display screen and not to influence the quality of the OLED display screen on images in the prior art, the application provides a driving method of a display panel.
Fig. 1 is a flowchart of an embodiment of a driving method of a display panel according to an embodiment of the present application. As shown in fig. 1, the method comprises the following steps:
step 101, acquiring an input image.
The display panel in the embodiment of the present application adopts an RGB color space, that is, any color is represented by a linear combination of three color channels of red (R), green (G) and blue (B). Thus, the input image is typically an RGB image.
Step 102, determining the brightness level of the input image.
The above-described brightness level is used to represent the brightness level of the input image. In an embodiment, two brightness levels are set, a first level and a second level, respectively. Wherein the first level indicates that the image is brighter and the second level indicates that the image is darker.
Step 103, respectively adjusting brightness components of pixels in each image partition on HSV color space based on the brightness levels, wherein the input image is divided intoThe images are partitioned.
HSV color space is also known as the hexagonal pyramid model, where the parameters of the colors are hue (H), saturation (S) and lightness (V), respectively. The brightness represents the brightness of the color, so the value of the brightness parameter is the brightness component, and adjusting the brightness component of the pixel in the HSV color space means adjusting the brightness of the pixel.
In the embodiment of the application, the input image is divided intoImage partitions, here, +.>Is an integer greater than 1, e.g6. On this basis, the brightness components of the pixels in each image partition on the HSV color space are respectively adjusted based on the brightness level of the input image, wherein the respectively adjusting means: the scaling of the luminance component on the HSV color space for pixels in an image partition may be different for different image partitions. This allows for differential brightness adjustment for different image partitions, which ensures that the image remains highly contrasting, minimizing the loss of the final output image compared to the original image.
As an alternative implementation, the input image is divided into the following waysImage partitions: dividing the input image according to the return font from the center of the input image to obtain ++>The images are partitioned. For example, referring to fig. 2, an example of dividing an input image into a plurality of image partitions is shown.
In fig. 2, the input image is divided into 6 image partitions including image partitions A1, A2, A3, A4, A5, and A6, the 6 image partitions being distributed in a zigzag from the center of the input image. The image partitions are divided in such a way that the viewing angle of the human eye when viewing the object diverges from the center to the periphery, and then brightness adjustment is performed on pixels in the image partitions in the same way, so that the image seen by the human eye can be kept uniform in brightness.
Step 104, determining a target driving current corresponding to each sub-pixel of the display panel based on the adjusted brightness component of each pixel in the input image.
In one embodiment, each pixel on the display panel is composed of three primary colors, red, green, and blue, and each color on each pixel is referred to as a sub-pixel, that is, each pixel on the display panel is decomposed into 3 sub-pixels, each sub-pixel processes one color channel.
Further, the variation of the pixel brightness means the variation of the driving current corresponding to each sub-pixel in the display panel, for example, as shown in fig. 3, a schematic diagram of the correspondence relationship between the gray scale value and the driving current in the RGB color space. Accordingly, in step 104, the target driving currents corresponding to the respective sub-pixels of the display panel are determined based on the adjusted luminance components of the respective pixels in the input image. The target drive current here means a drive current required to drive the pixels in the display panel to the above-described adjusted luminance.
Based on fig. 3, in an embodiment, determining a target driving current corresponding to each subpixel of the display panel based on the adjusted luminance component of each pixel in the input image includes: the following processing is performed for each pixel in the input image: determining a gray scale value of the pixel in an RGB color space based on the luminance component after the pixel adjustment; searching a preset corresponding relation between the gray scale of each sub-pixel and the driving current based on the gray scale value of the pixel in the RGB color space, and determining the target driving current of each sub-pixel corresponding to the pixel based on the searching result.
In practical applications, after the brightness components of each pixel in the input image are adjusted in the HSV color space, the input image is converted from the HSV color space to the RGB color space, so that the gray scale value of each pixel in the input image in the RGB color space can be obtained. It is understood that the gray scale values of the RGB color space herein include the gray scale values of the R color component, the G color component, and the B color component. Accordingly, a preset correspondence between the gray scale of the sub-pixel and the driving current is searched for based on the gray scale value of the pixel in the RGB color space (for example, in the example of fig. 3), and the target driving current of each sub-pixel corresponding to the pixel is determined based on the search result.
In addition, as shown in fig. 3, the driving current varies linearly between two adjacent sub-pixel gray levels, so when the corresponding relation between the preset sub-pixel gray level and the driving current is found based on the gray level value of the pixel in the RGB color space, if the corresponding relation containing the gray level value is not found, the adjacent value smaller than the gray level value and the adjacent value larger than the gray level value can be found from the corresponding relation shown in fig. 3, and then the linear operation is performed through the driving current corresponding to each of the two adjacent values, so as to obtain the target driving current.
Step 105, driving the display panel to display the input image using the target driving current corresponding to each sub-pixel.
For consistency in explanation of the technical solutions of the embodiments of the present application, for understanding by those skilled in the art, the following are specific for the unified explanation of the steps 102 to 105:
in order to estimate the power consumption of the display module, a power consumption calculation model of the pixel-level display module is provided, as shown in formula (one):
+/>formula 1
In the above-mentioned formula (one),representing the power consumption of the display module, +.>Representing the total number of pixels, ">、/>、/>Respectively represent +.>R, G, B component of individual pixels, index +. >Gamma correction value representing display content in standard RGB color space,/>、/>、/>The energy efficiency coefficients of the three color channels are R, G, B respectively.
From the above power consumption calculation model, it can be derived that it is the most effective and direct way to reduce the power consumption of the display module, and reduce the power consumption of the sub-pixels of the pixel point on the R, G, B three color channels. However, reducing the power consumption of the sub-pixels of the pixel on the three color channels R, G, B requires reducing the color components of the pixel on the three color channels R, G, B, and as the color components of the pixel on the three color channels R, G, B are reduced, the display quality of the image is inevitably affected. Therefore, a trade-off needs to be made between the image display quality and the power consumption of the display module, so that the final display quality of the image can be ensured while the power consumption of the display module is reduced.
Further, in the RGB color space, any color is related to the three color components R, G, B, and all of the three color components are closely related to brightness, that is, as long as brightness is changed, all of the three color components are correspondingly changed, so that the RGB color space is a color space with poor uniformity, which is suitable for a display system only and is not suitable for image processing. For the above reasons, the HSV color space is used for image processing in the embodiments of the present application. That is, in the embodiment of the application, the input image is converted from the RGB color space to the HSV color space, and the purpose of reducing the power consumption when the display module displays the input image is achieved by reducing the brightness component of the pixels in the input image on the HSV color space.
However, decreasing the luminance causes image distortion, as shown in fig. 4, which is a luminance change chart when the saturation is fixed in the HSV color space. As can be seen from fig. 4, when the brightness is within a certain range, for example, within a range of 0% to ±10%, the human eye cannot recognize the brightness change of the display image, whereas when the brightness is within a certain range, for example, within a range of ±10% to ±20%, the human eye can distinguish a slight change. Therefore, when the brightness components of the pixels in the image partition on the HSV color space are adjusted, the brightness components are reduced within a limited variation range, and the aim of reducing the display power consumption under the condition of ensuring high-quality display of the image can be achieved.
It should be noted that, when the input image is brighter, for example, the brightness level of the input image is the first level, the brightness component can be reduced as much as possible within the limited variation range, without affecting the viewing effect of the human eye; when the input image is darker, the human eye is sensitive to the change of the dark state, so that the brightness component is not reduced excessively in a limited change range, and the watching effect of the human eye is not influenced. It can be seen that adjusting the brightness component of the pixels in the image partition on the HSV color space based on the brightness level in step 103 above refers to: the adjustment ratio of the luminance components on the HSV color space for the pixels in the image partition may be different at different luminance levels.
According to the method provided by the embodiment of the application, the brightness level of the input image is determined, the brightness components of the pixels in each image partition on the HSV color space are respectively adjusted based on the brightness level, the target driving currents corresponding to the sub-pixels of the display panel are determined based on the brightness components of the pixels in the input image, the target driving currents corresponding to the sub-pixels are used for driving the display panel to display the input image, the purpose of reducing the display power consumption is achieved by adjusting the brightness of the input image, in the scheme, the brightness of the input image is adjusted through the original brightness level of the input image, the brightness of the input image is not adjusted according to the original brightness level of the input image, the quality of the image can be effectively ensured while the display power consumption is reduced, the watching effect of human eyes on the display image is prevented from being influenced due to the brightness reduction, and in the scheme, the brightness of the partitions are adjusted differently, namely, the brightness of different image partitions are adjusted differently, the image is ensured to keep high contrast, and the loss of the final output image compared with the original image is reduced to the minimum.
Fig. 5 is a flowchart of an embodiment of another driving method of a display panel according to an embodiment of the present application, where the flowchart shown in fig. 5 describes how to determine a brightness level of an input image based on fig. 1. As shown in fig. 5, the method comprises the following steps:
Step 501, converting the input image into an HSV color space, and obtaining brightness components of each pixel in the input image on the HSV color space.
Step 502, determining a first average luminance component of all pixels in the input image, and determining a second average luminance component of pixels in each image partition, respectively.
In this embodiment of the present application, for convenience of description, an average luminance component of all pixels in an input image is referred to as a first average luminance component, and an average luminance component of pixels in an image partition is referred to as a second average luminance component.
Step 503, determining a luminance level of the input image based on the first average luminance component and the respective second average luminance components.
In an embodiment, determining the luminance level of the input image based on the first average luminance component and the respective second average luminance components comprises: determining maximum and minimum values in each second average luminance component, and determining a difference between the maximum value and the minimum value; in the case where the difference is not less than the preset luminance difference threshold and the first average luminance component is not less than the preset luminance component threshold (for example, 0.7), the luminance level of the input image is determined to be the first level. In the case where the difference is smaller than the luminance difference threshold or the first average luminance value is smaller than the luminance component threshold, the luminance level of the input image is determined to be the second level. Here, the brightest image partition can be seen from the image partition corresponding to the maximum value, and the darkest image partition can be seen from the image partition corresponding to the minimum value. Further, the difference between the maximum and minimum values characterizes the brightness difference between the brightest and darkest image segments.
Therefore, when the brightness difference between the brightest image partition and the darkest image partition is large (not smaller than the preset brightness difference threshold value), and the average brightness component of the input image is large (not smaller than the preset brightness component threshold value), the input image is considered to be bright as a whole, and the brightness level of the input image is determined to be the first level. Conversely, in the case where the difference in luminance between the brightest image division and the darkest image division is small (smaller than the preset luminance difference amplitude threshold value) and the average luminance component of the input image is small (smaller than the preset luminance component threshold value), the input image is regarded as being darker as a whole, and the luminance level of the input image is determined to be the second level.
In an embodiment, determining the difference between the maximum and minimum values in the second average luminance component refers to: dividing the maximum value by the minimum value gives the difference between the two. Here, the luminance difference width threshold is, for example, 80%, and the larger the quotient value obtained by the division operation, the larger the difference width, the smaller the quotient value, and the smaller the difference width.
In addition, in practical applications, the difference between the maximum value and the minimum value in the second average luminance component may be determined by other means, such as by making a difference, where a larger difference means a larger difference and a smaller difference means a smaller difference.
The flow shown in fig. 5 achieves the determination of the brightness level of the input image, and in the flow shown in fig. 5, when the brightness level of the input image is determined, not only the average brightness component of the whole image but also the brightness difference between the brightest image partition and the darkest image partition is referred to, then when the brightness components of the pixels in the respective image partitions are adjusted according to the brightness level, this is equivalent to taking into account the original brightness difference between the image partitions, which can minimize the loss of the final output image compared with the original image.
In one embodiment, as shown in fig. 6, in the case where the brightness level of the input image is the first level, that is, in the case where the input image is brighter, the specific implementation of adjusting the brightness components of the pixels in each image partition on the HSV color space based on the brightness level includes the following steps:
step 601, converting the input image into an HSV color space, and obtaining brightness components of each pixel in the input image on the HSV color space.
Step 602, determining a second average luminance component of pixels in each image partition.
And 603, sequencing each image partition according to the sequence of the second average brightness value from the high value to the low value to obtain an image partition sequence.
Here, the image partitions are sorted in order of the second average luminance value from large to small, meaning that the image partitions are sorted in order of light to dark, resulting in a sequence of image partitions that changes gradually from light to dark.
Step 604 based onAnd determining the brightness reduction proportion of each image partition according to the ordering position of each image partition in the image partition sequence and the first preset proportion value.
As can be seen from the above description, in the case where the image is dark, it is not preferable to excessively reduce the luminance component of the pixels in the image, and therefore, the luminance reduction ratio corresponding to the image division will be different depending on the luminance of the image division, and the degree of the luminance component of the pixels in the image division will be reduced as the image division is darker. Here, the above-mentioned luminance reduction ratio means: the luminance component after the decrease occupies the proportion value of the luminance component before the decrease.
Based on this, in one embodiment, the specific implementation of step 604 includes: and for each image partition, calculating the number of the image partitions in the input image, the ordering positions of the image partitions in the image partition sequence and a first preset proportion value according to a preset formula to obtain the brightness reduction proportion of the image partition. The above preset formula is shown as the following formula (two):
Formula II
In the above-mentioned formula (two),for the +.>Brightness reduction ratio of individual image areas, +.>Is a first preset proportional value. From the above, in view of the perceived sensitivity of the human eye, the embodiments of the present application will be +.>The variation is limited to be within 10% (of course, the variation range can be adjusted within 20% as required, and the smaller the range is, the smaller the power consumption reduction degree is) so as to ensure the minimum loss of image quality while reducing the display power consumption.
As can be seen from the above formula (two), the degree of decrease in the luminance component is smaller as the ordering position of the image division in the image division sequence is more posterior, i.e., the image division is darker.
For example, assume the aboveThe brightness component after pixel adjustment in the brightest image partition is 90% of the original brightness component, corresponding to a 10% decrease in brightness component, and the brightness component after pixel adjustment in the sub-brightest image partition is 90% of the original brightness component, corresponding to a 9% decrease in brightness component.
Moreover, as can be seen from the above formula (two), according to the arrangement order of the image partitions in the image partition sequence, the brightness components of the image partitions gradually decrease in proportion, so that the brightness of different image partitions in the input image can be smoothly transited by processing, so that the human eyes can not perceive the change of the input image, and on the other hand, the display power consumption can be reduced to the greatest extent under the condition of ensuring the minimum loss of the image quality.
Step 605, respectively reducing the brightness components of the pixels in each image partition on the HSV color space according to the corresponding brightness reduction ratio.
In an embodiment, in a case where the brightness level of the input image is the second level, that is, in a case where the input image is darker, the specific implementation of adjusting the brightness components of the pixels in the respective image partitions on the HSV color space based on the brightness level includes: the reduction of the luminance component of the pixels in each image partition in HSV color space according to the second preset scale value can be represented by the following formula (iii):
formula (III)
In the above-mentioned formula (three),representing the luminance component after adjustment of the pixels in image partition i +.>Representing the original luminance component of the pixel, +.>Representing the second preset proportional value. From the above description, it is clear that->The setting should not be too large, in one embodiment +.>The value is limited to->In the range of 20% to 30%, e.g. taking the intermediate value, i.e. +.>*25%。
Therefore, under the condition that the input image is darker, the brightness components of pixels in different image partitions can be adjusted by adopting a smaller fixed proportion, so that the loss of image details caused by too much reduction of the brightness of the image can be avoided, and the display power consumption can be reduced to the greatest extent under the condition that the quality loss of the image is minimum.
Fig. 7 is a flowchart of an embodiment of a driving method of a display panel according to another embodiment of the present application, and the flowchart shown in fig. 7 describes a technical solution provided in the embodiment of the present application as a whole based on the foregoing embodiments. As shown in fig. 7, the method comprises the following steps:
step 701, acquiring an input image.
Step 702, converting the input image to an HSV color space.
Step 703, dividing the input image intoThe images are partitioned.
Step 704, determining a first average luminance component for all pixels in the input image, and determining a second average luminance component for pixels in each image partition, respectively.
Step 705, determining a brightness level of the input image based on the first average brightness component and each of the second average brightness components; in the case of the first level, step 706 is executed, and in the case of the second level, step 709 is executed.
And step 706, ordering the image partitions according to the order of the second average brightness value from the high value to the low value to obtain an image partition sequence.
Step 707 based onAnd determining the brightness reduction proportion of each image partition according to the ordering position of each image partition in the image partition sequence and the first preset proportion value.
Step 708, respectively reducing the brightness components of the pixels in each image partition on the HSV color space according to the corresponding brightness reduction proportion; step 711 is performed.
Step 709, reducing the brightness component of the pixels in each image partition on the HSV color space according to the second preset scale value.
Step 710, converting the input image with the adjusted luminance component into an RGB color space.
Step 711, searching a preset corresponding relation between the gray scale of the sub-pixel and the driving current based on the gray scale value of the pixel in the RGB color space, and determining the target driving current of each sub-pixel corresponding to the pixel based on the searching result.
Step 712, driving the display panel with the target driving current corresponding to each sub-pixel to display the input image.
The detailed descriptions of the steps 701 to 712 may be referred to the descriptions in the above embodiments, and are not repeated here.
According to the method, the purpose of reducing display power consumption is achieved by adjusting the brightness of the input image, in the scheme, the brightness of the input image is adjusted through the original brightness level of the input image, and the brightness of the input image is not adjusted without any basis, so that the quality of the image can be effectively ensured while the display power consumption is reduced, the watching effect of human eyes on the display image due to the reduction of the brightness is prevented from being influenced, in addition, in the scheme, brightness adjustment is carried out in the subareas, namely, the brightness adjustment is carried out in different image subareas in a differential mode, the image can be ensured to keep high contrast, and the loss of the final output image compared with the original image is reduced to the minimum.
Fig. 8 is a block diagram of an embodiment of a driving device for a display panel according to an embodiment of the present application. As shown in fig. 8, the apparatus includes:
an image acquisition module 81 for acquiring an input image;
a brightness determination module 82 for determining a brightness level of the input image;
a brightness adjustment module 83 for adjusting brightness components of pixels in each image partition based on the brightness levels, wherein the input image is divided into-dividing said image into sections;
a current determining module 84, configured to determine a target driving current corresponding to each sub-pixel of the display panel based on the adjusted brightness component of each pixel in the input image;
and a driving module 85, configured to drive the display panel to display the input image using the target driving currents corresponding to the sub-pixels.
In a possible implementation manner, the brightness determining module 83 includes:
a conversion unit, configured to convert the input image into an HSV color space, and obtain a luminance component of each pixel in the input image in the HSV color space;
an average value determining unit configured to determine first average luminance components of all pixels in the input image, and determine second average luminance components of pixels in each of the image partitions, respectively;
A level determining unit configured to determine a luminance level of the input image based on the first average luminance component and each of the second average luminance components.
In a possible embodiment, the level determining unit includes:
a reference value determination subunit configured to determine a maximum value and a minimum value in each of the second average luminance components, and determine a difference between the maximum value and the minimum value;
a determining subunit, configured to determine, when the difference is not less than a preset luminance difference threshold and the first average luminance component is not less than a preset luminance component threshold, that a luminance level of the input image is a first level;
and determining a brightness level of the input image as a second level in the case that the difference is smaller than the brightness difference threshold or the first average brightness value is smaller than the brightness component threshold.
In a possible implementation, the brightness level includes a first level; the brightness adjustment includes:
a conversion unit, configured to convert the input image into an HSV color space, and obtain a luminance component of each pixel in the input image in the HSV color space, when the luminance level of the input image is the first level;
An average value determining unit configured to determine a second average luminance component of pixels in each of the image partitions;
the sorting unit is used for sorting the image partitions according to the order of the second average brightness value from the large value to the small value to obtain an image partition sequence;
a drop ratio determining unit for determining the drop ratio based on theDetermining the brightness reduction proportion of each image partition according to the ordering position of each image partition in the image partition sequence and a first preset proportion value;
and the adjusting unit is used for respectively reducing the brightness components of the pixels in each image partition on the HSV color space according to the corresponding brightness reduction proportion.
In a possible embodiment, the drop ratio determining unit is specifically configured to:
for each image partition, calculating the number of the image partitions in the input image, the ordering positions of the image partitions in the image partition sequence and a first preset proportion value according to a preset formula to obtain the brightness reduction proportion of the image partition; the preset formula is as follows:
wherein->For the +.>The luminance reduction ratio of each image partition, And the first preset proportion value is obtained.
In a possible implementation, the brightness level includes a second level; the brightness adjustment module is specifically configured to:
and reducing the brightness components of the pixels in each image partition on the HSV color space according to a second preset proportion value under the condition that the brightness level of the input image is the second level.
In one possible implementation, the current determination module 84 includes:
an RGB gray-scale determining unit configured to determine, for each pixel in the input image, a gray-scale value of the pixel in an RGB color space based on the luminance component adjusted by the pixel;
the searching unit is used for searching the corresponding relation between the preset sub-pixel gray scale and the driving current based on the gray scale value of the pixel in the RGB color space; and determining the target driving current of each sub-pixel corresponding to the pixel based on the search result.
In one possible embodiment, the apparatus comprises:
a partition dividing module for dividing the input image into the following modesEach of the image partitions:
and starting from the center of the input image, dividing the input image according to the back character form to obtain N image partitions.
The application also provides a display module, which comprises a display panel and a control unit. The control unit is used for acquiring an input image; determining a brightness level of the input image; adjusting luminance components of pixels in each image partition based on the luminance levels, respectively, wherein the input image is divided into-dividing said image into sections; determining a target driving current corresponding to each sub-pixel of the display panel based on the adjusted brightness component of each pixel in the input image; and driving the display panel to display the input image by using the target driving current corresponding to each sub-pixel.
As shown in fig. 9, the embodiment of the present application provides an electronic device, which includes a processor 111, a communication interface 112, a memory 113, and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 perform communication with each other through the communication bus 114,
a memory 113 for storing a computer program;
in one embodiment of the present application, the processor 111 is configured to implement the driving method of the display panel provided in any one of the foregoing method embodiments when executing the program stored in the memory 113, where the method includes:
Acquiring an input image;
determining a brightness level of the input image;
adjusting luminance components of pixels in each image partition on HSV color space based on the luminance levels, respectively, wherein the input image is divided into-dividing said image into sections;
determining target driving currents corresponding to all sub-pixels of the display panel based on the brightness components adjusted by all pixels in the input image;
and driving the display panel to display the input image by using the target driving current corresponding to each sub-pixel.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
From the above description of embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus a general purpose hardware platform, or may be implemented by hardware. Based on such understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the related art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the method described in the respective embodiments or some parts of the embodiments.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A driving method of a display panel, the method comprising:
acquiring an input image;
determining a brightness level of the input image;
adjusting luminance components of pixels in each image partition on HSV color space based on the luminance levels, respectively, wherein the input image is divided intoSaid image partitions, said->Is an integer greater than 1;
determining target driving currents corresponding to all sub-pixels of the display panel based on the brightness components adjusted by all pixels in the input image;
driving the display panel using target driving currents corresponding to the respective sub-pixels to display the input image;
the determining the brightness level of the input image includes:
converting the input image into an HSV color space to obtain brightness components of all pixels in the input image on the HSV color space; determining first average luminance components of all pixels in the input image, and determining second average luminance components of pixels in each of the image partitions, respectively; determining a brightness level of the input image based on the first average brightness component and each of the second average brightness components;
The determining a luminance level of the input image based on the first average luminance component and each of the second average luminance components includes:
determining a maximum value and a minimum value in each of the second average luminance components, and determining a difference between the maximum value and the minimum value; determining that the brightness level of the input image is a first level in the case that the difference is not less than a preset brightness difference threshold and the first average brightness component is not less than a preset brightness component threshold; and determining a brightness level of the input image as a second level in the case that the difference is smaller than the brightness difference threshold or the first average brightness value is smaller than the brightness component threshold.
2. The method of claim 1, wherein the brightness level comprises a first level; the adjusting the brightness components of the pixels in each image partition on the HSV color space based on the brightness levels comprises:
converting the input image into an HSV color space under the condition that the brightness level of the input image is the first level, and obtaining brightness components of pixels in the input image on the HSV color space;
Determining a second average luminance component of pixels in each of said image partitions;
sequencing the image partitions according to the sequence from the high average brightness value to the low average brightness value to obtain an image partition sequence;
based on the followingDetermining the brightness reduction proportion of each image partition according to the ordering position of each image partition in the image partition sequence and a first preset proportion value;
and respectively reducing the brightness components of the pixels in each image partition on the HSV color space according to the corresponding brightness reduction proportion.
3. The method of claim 2, wherein determining the luminance reduction ratio of each image partition based on the number of image partitions in the input image, the ordering position of each image partition in the sequence of image partitions, and a first preset ratio value comprises:
for each image partition, calculating the number of the image partitions in the input image, the ordering positions of the image partitions in the image partition sequence and a first preset proportion value according to a preset formula to obtain the brightness reduction proportion of the image partition; the preset formula is as follows:
Wherein->For the +.>Brightness reduction ratio of individual image areas, +.>And the first preset proportion value is obtained.
4. The method of claim 1, wherein the brightness level comprises a second level; the adjusting the brightness components of the pixels in each image partition on the HSV color space based on the brightness levels comprises:
and reducing the brightness components of the pixels in each image partition on the HSV color space according to a second preset proportion value under the condition that the brightness level of the input image is the second level.
5. The method of claim 1, wherein determining the target drive current for each subpixel of the display panel based on the adjusted luminance component for each pixel in the input image comprises:
the following processing is performed for each pixel in the input image:
determining a gray scale value of the pixel in an RGB color space based on the adjusted brightness component of the pixel;
searching a preset corresponding relation between the gray scale of the sub-pixel and the driving current based on the gray scale value of the pixel in the RGB color space;
and determining the target driving current of each sub-pixel corresponding to the pixel based on the search result.
6. The method according to any of claims 1-5, characterized in that the input image is divided intoEach of the image partitions:
and starting from the center of the input image, dividing the input image according to the back character form to obtain N image partitions.
7. A driving apparatus of a display panel, the apparatus comprising:
the image acquisition module is used for acquiring an input image;
a brightness determining module for determining a brightness level of the input image;
the determining the brightness level of the input image includes:
converting the input image into an HSV color space to obtain brightness components of all pixels in the input image on the HSV color space; determining first average luminance components of all pixels in the input image, and determining second average luminance components of pixels in each image partition, respectively; determining a brightness level of the input image based on the first average brightness component and each of the second average brightness components;
the determining a luminance level of the input image based on the first average luminance component and each of the second average luminance components includes:
Determining a maximum value and a minimum value in each of the second average luminance components, and determining a difference between the maximum value and the minimum value; determining that the brightness level of the input image is a first level in the case that the difference is not less than a preset brightness difference threshold and the first average brightness component is not less than a preset brightness component threshold; determining a brightness level of the input image as a second level if the difference is less than the brightness difference threshold or the first average brightness value is less than the brightness component threshold;
a brightness adjustment module for adjusting brightness components of pixels in each image partition based on the brightness levels, wherein the input image is divided intoSaid image partitions, said->Is an integer greater than 1;
the current determining module is used for determining target driving currents corresponding to all sub-pixels of the display panel based on the brightness components adjusted by all pixels in the input image;
and the driving module is used for driving the display panel by using the target driving current corresponding to each sub-pixel so as to display the input image.
8. The display module is characterized by comprising a display panel and a control unit;
The control unit acquires an input image;
determining a brightness level of the input image;
adjusting luminance components of pixels in each image partition based on the luminance levels, respectively, wherein the input image is divided intoSaid image partitions, said->Is an integer greater than 1;
determining a target driving current corresponding to each sub-pixel of the display panel based on the adjusted brightness component of each pixel in the input image;
driving the display panel using target driving currents corresponding to the respective sub-pixels to display the input image;
the determining the brightness level of the input image includes:
converting the input image into an HSV color space to obtain brightness components of all pixels in the input image on the HSV color space; determining first average luminance components of all pixels in the input image, and determining second average luminance components of pixels in each of the image partitions, respectively; determining a brightness level of the input image based on the first average brightness component and each of the second average brightness components;
the determining a luminance level of the input image based on the first average luminance component and each of the second average luminance components includes:
Determining a maximum value and a minimum value in each of the second average luminance components, and determining a difference between the maximum value and the minimum value; determining that the brightness level of the input image is a first level in the case that the difference is not less than a preset brightness difference threshold and the first average brightness component is not less than a preset brightness component threshold; and determining a brightness level of the input image as a second level in the case that the difference is smaller than the brightness difference threshold or the first average brightness value is smaller than the brightness component threshold.
9. An electronic device, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor coupled to the at least one bus; at least one memory coupled to the at least one bus, wherein the processor is configured to:
acquiring an input image;
determining a brightness level of the input image;
adjusting luminance components of pixels in each image partition based on the luminance levels, respectively, wherein the input image is divided intoSaid image partitions, said- >Is an integer greater than 1;
determining target driving currents corresponding to all sub-pixels of the display panel based on the brightness components adjusted by all pixels in the input image;
driving the display panel using target driving currents corresponding to the respective sub-pixels to display the input image;
the determining the brightness level of the input image includes:
converting the input image into an HSV color space to obtain brightness components of all pixels in the input image on the HSV color space; determining first average luminance components of all pixels in the input image, and determining second average luminance components of pixels in each of the image partitions, respectively; determining a brightness level of the input image based on the first average brightness component and each of the second average brightness components;
the determining a luminance level of the input image based on the first average luminance component and each of the second average luminance components includes:
determining a maximum value and a minimum value in each of the second average luminance components, and determining a difference between the maximum value and the minimum value; determining that the brightness level of the input image is a first level in the case that the difference is not less than a preset brightness difference threshold and the first average brightness component is not less than a preset brightness component threshold; and determining a brightness level of the input image as a second level in the case that the difference is smaller than the brightness difference threshold or the first average brightness value is smaller than the brightness component threshold.
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