CN109712578B - Display method and display device - Google Patents
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- CN109712578B CN109712578B CN201910153297.8A CN201910153297A CN109712578B CN 109712578 B CN109712578 B CN 109712578B CN 201910153297 A CN201910153297 A CN 201910153297A CN 109712578 B CN109712578 B CN 109712578B
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Abstract
The embodiment of the invention discloses a display method and a display device, wherein the display method comprises the following steps: acquiring an image to be displayed; extracting a contour bright line of an image to be displayed, and acquiring a gray scale peak value Y1 of the contour bright line; judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0; if yes, increasing the gray scale peak value Y1 and increasing the gray scale values of other sub-pixels of the contour bright line in the display panel; and reducing the output brightness of the backlight subarea corresponding to the outline bright line. The display method provided by the embodiment of the invention can improve the display contrast and reduce the halo at the same time.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display method and a display device.
Background
Dynamic Range (DR) broadly refers to a span Range in which a change transaction can be changed, and for a static image or a video frame, the Dynamic Range is a Range from the darkest tone to the brightest tone, and the change of brightness is realized in the Range; the larger the range is, the more gradation of the image is changed in brightness, and the stronger the description ability of the display device on the details of the image is. A conventional Liquid Crystal Display (LCD) device uses a global backlight, a dynamic range of the LCD device is about 2 orders of magnitude, and the global backlight has a serious light leakage phenomenon, which is one of the reasons for limiting the Display contrast of the LCD.
Currently, to solve this problem, a regional backlight Dynamic adjustment technique is proposed, in which the backlight is divided into a plurality of independent partitions, and the brightness of the backlight of each partition can be adjusted in real time according to the bright and dark fields of the image to be displayed, so that High Dynamic Range (HDR) display of the LCD can be realized. However, due to the limitation of the number of backlight partitions, the existing HDR display cannot realize pixel-level backlight brightness control, thereby resulting in lower display contrast of image edge contours and more severe halo phenomenon.
Disclosure of Invention
The invention provides a display method and a display device, which are used for improving display contrast and reducing halation.
In a first aspect, an embodiment of the present invention provides a display method, where the display method includes:
acquiring an image to be displayed;
extracting a contour bright line of the image to be displayed, and acquiring a gray scale peak value Y1 of the contour bright line;
judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0;
if yes, increasing the gray scale peak value Y1 and increasing the gray scale values of other sub-pixels of the contour bright line in the display panel; and reducing the output brightness of the backlight subarea corresponding to the outline bright line.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device is configured to execute the display method provided in the first aspect, and the display device includes:
the image receiving module is used for acquiring an image to be displayed;
the contour extraction module is used for extracting a contour bright line of the image to be displayed and acquiring a gray scale peak value Y1 of the contour bright line;
the condition judgment module is used for judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0;
the first output data determination module is used for increasing the gray scale peak value Y1 and increasing the gray scale values of other sub-pixels of the contour bright line in the display panel when the gray scale peak value Y1 is smaller than a preset gray scale value Y0; and reducing the output brightness of the backlight subarea corresponding to the outline bright line.
According to the display method provided by the embodiment of the invention, when the gray scale peak value Y1 of the outline bright line is smaller than the preset gray scale value Y0, the gray scale peak value Y1 is increased, and the gray scale values of other sub-pixels of the outline bright line in the display panel are increased; and reducing the output brightness of the backlight subarea corresponding to the outline bright line, thereby being beneficial to reducing the output brightness of the backlight subarea corresponding to the outline bright line on the premise of ensuring that the display brightness of the outline bright line of the image to be displayed is consistent with the brightness to be displayed, namely being beneficial to reducing the brightness of the sub-pixels which are not used for displaying the image to be displayed on the premise of ensuring that the display is not distorted, and further being beneficial to reducing the brightness of the sub-pixels which are not used for displaying the image to be displayed, so that the brightness ratio of the sub-pixels which are used for displaying to the sub-pixels which are not used for displaying is increased, and further improving the. Meanwhile, the output brightness of the backlight subareas is reduced, so that the halo phenomenon caused by light leakage when the backlight brightness is high is favorably improved.
Drawings
Fig. 1 is a schematic flow chart of a display method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of another display method according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a further display method according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating another display method according to an embodiment of the present invention;
FIG. 5 is a comparison graph of display effects of a display method according to an embodiment of the present invention and a conventional display method;
FIG. 6 is a comparison graph of display effects of another display method provided by the embodiment of the present invention and a conventional display method;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another display device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic flow chart of a display method according to an embodiment of the present invention. Referring to fig. 1, the display method includes:
and S010, acquiring an image to be displayed.
The image to be displayed is an image required to be displayed by the display device.
For example, the image to be displayed may be a static picture or a frame of picture in a dynamic scene. The image data of the image to be displayed may include the colors of the display sub-pixels of the image to be displayed and their corresponding gray scale values, and may also include other types of image data as would be known to those skilled in the art.
S020, extracting the outline bright line of the image to be displayed, and acquiring the gray scale peak value Y1 of the outline bright line.
The outline bright line can also be called as a bright line outline, and can be understood as a contour line with brighter brightness. The contour line refers to an outer boundary line of an individual, a group, or a scene in an image to be displayed, refers to a boundary line between one object and another object, and refers to a boundary line between an object and a background. On the basis, when the brightness of the contour line is brighter, the contour line is a contour bright line of the image to be displayed. As will be understood by those skilled in the art, the term "brighter" refers to a relative brightness that appears when the image is displayed in bright or dark states, and is not limited to the magnitude of the absolute brightness value.
For example, when the image to be displayed includes a square block, the outline bright line of the square block may be a side line surrounding the square block; when the image to be displayed comprises a circle, the outline bright line of the circle can be a sideline surrounding and forming the circle; when the image to be displayed includes a line, the outline bright line of the line may be the line itself.
It should be noted that, the above is only a simple graph as an example, and the outline bright line is exemplarily described; when the image to be displayed comprises a complex graph or a complex picture, the outline bright line is obtained according to an algorithm of a built-in program in the display device, and the embodiment of the invention does not limit the specific shape of the outline bright line.
For example, the algorithm of the built-in program in the display device may be that a result matrix is obtained by performing convolution operation on a luminance matrix corresponding to the sub-pixel matrix and an operator matrix, and whether a sub-pixel belongs to the outline of the image to be displayed is determined based on the value of each element in the result matrix. And calculating to obtain all the sub-pixels of the bright contour line belonging to the image to be displayed, namely forming the bright contour line of the image to be displayed.
The gray-scale peak value Y1 is the gray-scale value of the sub-pixel with the brightest brightness to be displayed in the outline bright line.
Illustratively, each sub-pixel in the contour bright line corresponds to a respective gray-scale value, and the larger the gray-scale value is, the brighter the display brightness of the corresponding sub-pixel is. And comparing the gray-scale values corresponding to the sub-pixels to obtain the maximum gray-scale value in the gray-scale values corresponding to the sub-pixels, namely the gray-scale peak value Y1 of the bright outline.
Illustratively, the gray scale values of the sub-pixels in the bright outline of the image to be displayed are 125, 150, 189, 213 and 215, respectively, and the peak gray scale value Y1 is 215.
S030, judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0.
The preset gray level Y0 is a gray level stored in the display device, and the preset gray level Y0 may be a pre-stored fixed gray level or a variable gray level that can be changed according to the image quality display requirement of the image to be displayed.
The preset gray-scale value Y0 corresponds to a brighter display luminance, so as to improve the feasibility of the gray-scale value increasing operation in the subsequent steps.
For example, when the gray-scale value corresponding to the brightest luminance displayable by the display device is 255, the preset gray-scale value Y0 may take the value of 250 or 245 or other gray-scale values equal to or less than 255, which may be set according to the image quality display requirement of the image to be displayed, which is not limited in the embodiment of the present invention.
If the determination result is yes (Y), the gray-scale peak Y0 is increased, and S040 is executed.
S040, increasing the gray scale peak value Y1, and increasing the gray scale values of other sub-pixels of the outline bright line in the display panel; and reducing the output brightness of the backlight subarea corresponding to the outline bright line.
The display brightness of the display device is mainly determined by the gray-scale value of the sub-pixels in the display panel and the output brightness of the backlight subarea, and the output brightness of the backlight subarea depends on the output brightness of the backlight subarea. Generally, the current of the backlight partition, the brightness of the backlight partition and the display brightness of the display device are corresponding, and the gray-scale value of the sub-pixel in the display panel and the display brightness of the display device are corresponding. As will be understood by those skilled in the art, the larger the output current of the backlight partition is, the brighter the output brightness of the backlight partition is, which is beneficial to make the display brightness of the display device brighter; the higher the gray-scale value of a subpixel in the display panel, the brighter the display luminance of the display device.
In the step, in order to reduce the output brightness of the backlight subarea and reduce the output current of the backlight subarea; meanwhile, the gray-scale value of the sub-pixels of the outline bright line is increased, so that the display brightness of the display device is improved; by comprehensively considering the two factors (i.e. the gray-scale value of the sub-pixel and the output luminance of the backlight partition) affecting the display luminance of the display device, the output luminance of the backlight partition can be reduced on the premise of ensuring that the image actually displayed by the display device is consistent with the image to be displayed, i.e. on the premise of ensuring that the display is not distorted. Due to the fact that the output brightness of the backlight subarea is reduced, the brightness of the sub-pixels which are not used for displaying the image to be displayed and correspond to the backlight subarea is reduced, and therefore the brightness ratio of the sub-pixels which are used for displaying the image to be displayed to the sub-pixels which are not used for displaying the image to be displayed is increased, and therefore the display contrast is improved. Meanwhile, the output brightness of the backlight subarea is reduced, and the halo phenomenon possibly caused by serious light leakage when the backlight brightness is high is favorably improved.
In addition, the output brightness of the backlight partition is reduced, and the output current of the backlight partition is reduced, and the smaller output current of the backlight partition is beneficial to reducing the power consumption of the display device, so that the display method provided by the embodiment of the invention is also beneficial to reducing the power consumption of the display device.
Optionally, fig. 2 is a schematic flow chart of another display method according to an embodiment of the present invention. Referring to fig. 2, the display method includes:
and S110, acquiring an image to be displayed.
S120, extracting the outline bright line of the image to be displayed, and acquiring a gray scale peak value Y1 of the outline bright line.
S130, judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0.
If yes, go to step S140.
S140, increasing the gray scale peak Y1 to a preset gray scale value Y0 to display other sub-pixels of the outline bright line in the panelBrightness valueIncrease to the originalOf a value of luminanceM times;
and reducing the output brightness of the backlight partition corresponding to the outline bright line to the original output brightness
Wherein the value range of gamma is more than or equal to 1.9 and less than or equal to 2.5.
Wherein, the brightness value of other sub-pixels of the outline bright line in the display panel is increased to M times of the original brightness value,
the brightness change of each sub-pixel in the outline bright line can be consistent, so that the relative brightness of each sub-pixel in the image actually displayed by the display device is kept consistent with the relative brightness of each sub-pixel in the image to be displayed, and a good image display effect is ensured.
Illustratively, the gray scale peak value Y1 is 230, the preset gray scale value Y0 is 240,
at this time, the process of the present invention,
the peak gray level Y1 is 200, the preset gray level Y0 is 235,
at this time, the process of the present invention,
this is merely an exemplary illustration and does not constitute a limitation on the display method provided by the embodiments of the present invention.
In order to quantitatively indicate the corresponding relationship between the gray-scale value of the sub-pixel and the brightness value of the sub-pixel, a gamma curve is introduced, different gamma curves can indicate different quantitative relationships between the gray-scale value and the brightness value of the sub-pixel, the difference of the gamma curves can be represented by gamma, and gamma is called a gamma factor.
Illustratively, when the corresponding relationship between the gray scale value and the brightness value is expressed based on the standard gamma2.2 curve, the value of gamma is 2.2, and at this time,
since Y0 > Y1,
thus, M > 1. By reducing the output brightness of the backlight sub-area corresponding to the outline bright line to the original output brightness
The output brightness of the backlight subarea can be reduced, so that the output brightness change of the backlight subarea and the change of the brightness value of the sub-pixel of the outline bright line are comprehensively considered, the consistency of the real display brightness of the outline bright line of the image to be displayed and the brightness to be displayed can be ensured, and the undistorted display is favorably ensured. Under the premise, due to the reduction of the output brightness of the backlight subarea, the brightness of the sub-pixels which are not used for displaying the image to be displayed and correspond to the backlight subarea is favorably reduced, so that the brightness ratio of the sub-pixels used for displaying the image to be displayed to the sub-pixels not used for displaying the image to be displayed is increased, and the display contrast is improved. Meanwhile, the output brightness of the backlight subarea is reduced, and the halo phenomenon caused by light leakage when the backlight brightness is high is favorably improved. In addition, the power consumption of the display device is reduced, and the service life of the display device is prolonged.
Optionally, the preset gray level Y0 is the highest gray level.
The highest gray scale value is a gray scale value corresponding to the highest display brightness which can be displayed by the display panel.
Illustratively, the highest gray level value is 255, and at this time, the preset gray level value Y0 is 255.
By the arrangement, the output brightness of the backlight subarea can be reduced to the maximum extent, so that the display contrast and the halation can be improved, and meanwhile, the power consumption of the display device can be reduced to the maximum extent.
Optionally, fig. 3 is a schematic flow chart of another display method according to an embodiment of the present invention. Referring to fig. 3, the display method includes:
and S210, acquiring an image to be displayed.
S220, extracting the outline bright line of the image to be displayed, and acquiring a gray scale peak value Y1 of the outline bright line.
S230, judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0.
If yes, S240 is executed.
S240, increasing the gray-scale peak value Y1 to a preset gray-scale value Y0, the other sub-pixels of the outline bright line in the display panelBrightness valueIncrease to the originalBrightness valueM times of;
and reducing the output brightness of the backlight partition corresponding to the outline bright line to the original output brightness
Wherein the value range of gamma is more than or equal to 1.9 and less than or equal to 2.5.
If the determination result is negative, S250 is executed.
S250, thickening the line width of the outline bright line to K times of the original line width, and reducing the output brightness of the backlight subarea corresponding to the outline bright line to the original output brightness
Wherein K is more than 1.
If the determination result is negative, the gray scale peak value Y1 is not less than the preset gray scale value Y0, and at this time, the feasibility of the manner of increasing the gray scale value is poor. In this case, S250 may be executed, that is, the line width of the outline bright line is thickened, so as to achieve the purpose of improving the contrast and the halo on the premise that the display brightness of the outline bright line of the image to be displayed is not changed.
Illustratively, K can take on values of 1.3, 2,
Or other decimal, fractional or integer greater than 1, which is not limited in the embodiments of the present invention.
First, when the preset gray level Y0 is the highest gray level, if the determination result in S230 is negative, that is, when the peak gray level Y1 is equal to the highest gray level, the gray level cannot be increased any more, then S240 is not possible, and at this time, S250 is executed.
Next, it should be noted that when the preset gray level value Y0 is smaller than the highest gray level value, if the determination result in S230 is yes, that is, the peak gray level value Y1 is smaller than the preset gray level value Y0, and certainly, the peak gray level value Y1 is also smaller than the highest gray level value, at this time, S240 and S250 may be executed in parallel, that is, "increase the peak gray level value Y1 to the preset gray level value Y0, increase the gray level values of other sub-pixels of the contour bright line in the display panel to M times the original gray level value,
at the same time, the line width of the outline bright line is thickened to K times of the original line width, and at the moment, the output brightness of the backlight subarea corresponding to the outline bright line is reduced to the original output brightness
The actual display brightness of the outline bright line of the image to be displayed is ensured to be consistent with the brightness to be displayed, the contrast and the halation are improved on the premise, and meanwhile, the power consumption of the display device is reduced.
Optionally, K is more than 1 and less than or equal to 3, and K is an integer.
By the arrangement, on one hand, the operation process in the algorithm is facilitated to be simplified; on the other hand, the thickening multiple of the bright line outline is not too large, thereby being beneficial to avoiding the distortion of the display picture.
Illustratively, K may take a value of 2 or 3.
It should be noted that, the resolution, and the display effect of the display panel are taken into consideration comprehensively, and the value of K may be set according to the actual requirements of the display method and the display device on the premise that the display picture is not distorted, which is not limited in the embodiment of the present invention.
Optionally, the original line width of the outline bright line is equal to a times of the size of the sub-pixel, and the line width of the thickened outline bright line is equal to B times of the size of the sub-pixel, where a and B are positive integers, and B > a.
By the arrangement, the thickening of the outline bright line can be realized on the sub-pixel size level.
The size of the sub-pixel can be understood as the width of the sub-pixel along a predetermined direction. Illustratively, the sub-pixels form a sub-pixel array, and when the shape of the sub-pixels is square, the size of the sub-pixels can be understood as the length of the long side or the length of the short side of the sub-pixels; when the shape of the sub-pixel is circular, the size of the sub-pixel can be understood as the length of the diameter of the sub-pixel; when the shape of the sub-pixel is irregular, the size of the sub-pixel can be understood as the length of the sub-pixel along a predetermined direction in the sub-pixel array, and the predetermined direction is perpendicular to the extending direction of the outline bright line. For example, when the extending direction of the outline bright line is a row direction, the predetermined direction is a column direction, and the column direction is perpendicular to the row direction.
Wherein, B can be integer multiple or non-integer multiple of A.
Illustratively, a takes the value of 1, and B may take the value of 2 or 3; the value of A is 5, and the value of B can be 6, 7 or 8. This is merely an exemplary illustration, and does not constitute a limitation on the display method provided by the embodiment of the present invention.
On this basis, fig. 4 is a schematic flow chart of another display method according to an embodiment of the present invention. Referring to fig. 4, the display method includes:
and S310, acquiring an image to be displayed.
S320, extracting the outline bright line of the image to be displayed, and acquiring the gray scale peak value Y1 of the outline bright line.
S330, judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0.
If yes, go to step S340.
S340, increasing the gray scale peak Y1 to a preset gray scale value Y0, the other sub-pixels of the outline bright line in the display panelBrightness valueIncrease to the originalBrightness valueM times of;
and reducing the output brightness of the backlight partition corresponding to the outline bright line to the original output brightness
Wherein the value range of gamma is more than or equal to 1.9 and less than or equal to 2.5.
If the determination result is negative, S350 is executed.
S350, thickening the line width of the outline bright line to the original line width
Multiplying and reducing the output brightness of the backlight subarea corresponding to the outline bright line to the original output brightness
Wherein B > A.
In step S340, the actual display brightness of the outline bright line of the image to be displayed is ensured to be consistent with the brightness to be displayed by adjusting the gray-scale value and the output brightness of the backlight partition; in S350, the actual display brightness of the bright line of the outline of the image to be displayed is ensured to be consistent with the brightness to be displayed by adjusting the line width of the bright line of the outline and the output brightness of the backlight partition. Of course, on this basis, in order to ensure that the actual display luminance of the contour bright line of the image to be displayed is consistent with the luminance to be displayed, the gray scale value, the line width of the contour bright line, and the output luminance of the backlight partition may be adjusted according to the actual requirements of the display method and the display device, which is not limited in the embodiment of the present invention.
For example, fig. 5 is a comparison graph of the display effect of the display method provided by the embodiment of the present invention and the display effect of the existing display method, which shows a display effect graph 900 (see fig. 5) of the existing display method when the image to be displayed is a curved line and a display effect graph 910 (see fig. 5) of the display method provided by the embodiment of the present invention, which shows a first display image 000 before the improvement and a second display image 001 after the improvement. The backlight partitions can be divided into two types, namely an on-state backlight area 810 and an off-state backlight area 820.
Illustratively, the line width of the first display image 000 is 1.5mm, and the peak gray level Y1 is 230; the line width of the second display image 001 was 2.25mm, and the peak gray level Y1 was 255.
Note that, in fig. 5, in order to show the improvement effect, the lighting effect of the backlight is shown. The on-state backlight area 810 is lighted up to emit light for displaying an image to be displayed; the off backlight area 820 is not illuminated, i.e., does not emit light. The overall display brightness of the second display image 001 is consistent with the overall display brightness of the first display image 000, and the display method provided by the embodiment of the invention increases the line width of the outline bright line of the image to be displayed and the gray scale peak value Y1, so that the output current of the backlight subarea is reduced, the output brightness of the backlight subarea is reduced, thereby the contrast and the halo are improved, and the power consumption of the display device is reduced.
Next, it should be noted that fig. 5 only exemplarily shows 4 rows and 4 columns of backlight partitions, and 4 of the backlight partitions are lit, but the present invention is not limited to the display method provided by the embodiment of the present invention. In other embodiments, the number and arrangement of the backlight partitions and the number and positions of the lighted backlight partitions may be set according to actual requirements of the display method, which is not limited in the embodiments of the present invention.
Exemplarily, fig. 6 is a comparison graph of a display effect of another display method provided by an embodiment of the present invention and a display effect of an existing display method, and shows a third display image 003 before improvement and a fourth display image 004 after improvement when an image to be displayed is a straight line. The left and right images are display effect images obtained by amplifying the image to be displayed at the pixel level.
Illustratively, the third display image 003 is a "white line" with a width of 2 sub-pixels, and the fourth display image 004 is a "gray line" with a width of 3 sub-pixels, which are applied to a macro display screen, and when the display method is used for screen display of a display device, since the size of the sub-pixels is generally equal to or smaller than micron, human eyes cannot feel the difference between the display brightness and the display width of the lines in the third display image 003 and the fourth display image 004, so that the display method provided by the embodiment of the invention can reduce the output brightness of the backlight partition on the premise of ensuring that the final display brightness of the image to be displayed is consistent with the brightness to be displayed, thereby improving the display contrast and improving halo, and being beneficial to reducing the power consumption of the display device.
First, the width of the sub-pixel described in fig. 6 is a size of the sub-pixel in the left-to-right direction with the orientation in fig. 6 as an example.
Next, fig. 5 and fig. 6 illustrate the display contrast effect of the conventional display method and the display method provided by the embodiment of the present invention only by taking a curve and a straight line as examples, but do not limit the display method provided by the embodiment of the present invention. In other embodiments, the image to be displayed may also be other complex pictures, which is not limited in the embodiment of the present invention.
Thirdly, it should be noted that, for a complex geometric figure formed by splicing simple geometric figures or images to be displayed, when the brightness to be displayed of the geometric figure is consistent at the edge and the inside of the figure, the gray scale value, the geometric size (equivalent to the above "line width"), and the output brightness of the backlight partition of the whole geometric figure can be adjusted by using the above display method, so as to improve the display contrast and improve the halo, and reduce the power consumption of the display device.
Based on the same inventive concept, embodiments of the present invention further provide a display apparatus, where the display apparatus may be configured to perform the display method provided in the embodiments of the present invention, or the display apparatus may perform image display by applying the display method provided in the embodiments, so that the display apparatus also has the technical effects of the display method, and the same parts are not described in detail below, and can be understood by referring to the explanation of the display method above.
For example, fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 7, the display device 40 includes: an image receiving module 410, configured to obtain an image to be displayed; the contour extraction module 420 is configured to extract a contour bright line of the image to be displayed, and obtain a gray scale peak value Y1 of the contour bright line; the condition judgment module 430 is configured to judge whether the grayscale peak value Y1 is smaller than a preset grayscale value Y0; the first output data determining module 440, configured to increase the gray scale peak value Y1 and increase the gray scale values of other sub-pixels of the contour bright line in the display panel when the gray scale peak value Y1 is smaller than the preset gray scale value Y0; and reducing the output brightness of the backlight subarea corresponding to the outline bright line.
Optionally, the first output data determining module 440 increases the gray scale peak value Y1, and increases the gray scale values of other sub-pixels of the contour bright line in the display panel; and reducing the output brightness of the backlight partition corresponding to the outline bright line may specifically include: increasing the gray scale peak value Y1 to a preset gray scale value Y0, increasing the gray scale values of other sub-pixels of the outline bright line in the display panel to M times of the original gray scale value,
and reducing the output brightness of the backlight partition corresponding to the outline bright line to the original output brightness
Wherein the value range of gamma is more than or equal to 1.9 and less than or equal to 2.5.
Therefore, the relative brightness of each sub-pixel in the image actually displayed by the display device is kept consistent with the relative brightness of each sub-pixel in the image to be displayed, so that a good image display effect is ensured, the display contrast is improved, the halo is improved, and the power consumption of the display device is reduced.
Optionally, fig. 8 is a schematic structural diagram of another display device provided in an embodiment of the present invention. Referring to fig. 8, on the basis of the display apparatus 40 shown in fig. 7, the display apparatus 40 further includes a second output data determining sub-module 450; the second output data determination submodule 450 is for determining grayWhen the peak value Y1 is not less than the preset gray value Y0, the line width of the outline bright line is increased to K times of the original line width, and the output brightness of the backlight subarea corresponding to the outline bright line is reduced to the original output brightness
Wherein K is more than 1.
Optionally, fig. 9 is a schematic structural diagram of another display device according to an embodiment of the present invention. Referring to fig. 9, on the basis of the display device 40 shown in fig. 8, the display device 40 further includes a parameter storage module 460, and the parameter storage module 460 is electrically connected to the condition judgment module 430; the parameter storage module 460 is used for storing preset gray-scale values Y0 and K.
Optionally, the display panel includes a plurality of sub-pixels distributed in an array; the original line width of the outline bright line is equal to A times of the size of the sub-pixel, the line width of the outline bright line after thickening is equal to B times of the size of the sub-pixel, wherein A and B are positive integers, and B is larger than A.
Optionally, the second output data determining sub-module 450 reduces the output brightness of the backlight partition corresponding to the outline bright line to the original output brightness
The method comprises the following steps: reducing the output brightness of the backlight partition corresponding to the outline bright line to the original output brightness
By the arrangement, the thickening of the outline bright line can be realized on the sub-pixel size level.
Optionally, the preset gray level Y0 is the highest gray level.
By the arrangement, the output brightness of the backlight subarea can be reduced to the maximum extent, so that the display contrast and the halation can be improved, and meanwhile, the power consumption of the display device can be reduced to the maximum extent.
It should be noted that, in the structural schematic diagrams of the display device 40 shown in fig. 7-8, the modules are functionally divided by way of example only, and the signal transmission relationship between the modules is indicated by using connection lines. In an actual product, spatial positions of the modules may overlap, and signal transmission between the modules may be wired transmission or wireless transmission, which is not limited in the embodiments of the present invention.
For example, the display device 40 may include a display device such as a mobile phone, a computer, and a smart wearable device (e.g., a smart watch), which is not limited in this embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (12)
1. A display method, comprising:
acquiring an image to be displayed;
extracting a contour bright line of the image to be displayed, and acquiring a gray scale peak value Y1 of the contour bright line;
judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0;
if yes, increasing the gray scale peak value Y1 and increasing the gray scale values of other sub-pixels of the contour bright line in the display panel; and reducing the output brightness of the backlight subarea corresponding to the outline bright line.
2. The method according to claim 1, wherein the gray scale peak value Y1 is increased, and the gray scale values of other sub-pixels of the contour bright line in the display panel are increased; and reducing the output brightness of the backlight subarea corresponding to the outline bright line comprises the following steps:
will be describedIncreasing the gray scale peak value Y1 to the preset gray scale value Y0, and increasing the brightness values of other sub-pixels of the contour bright line in the display panel to M times of the original brightness value;
and reducing the output brightness of the backlight subarea corresponding to the outline bright line to the original output brightness
Wherein the value range of gamma is more than or equal to 1.9 and less than or equal to 2.5.
3. The display method according to claim 1, wherein the preset gray-scale value Y0 is the highest gray-scale value.
4. The method as claimed in claim 1, wherein after determining whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0, the method further comprises:
if not, the line width of the outline bright line is thickened to K times of the original line width, and the output brightness of the backlight subarea corresponding to the outline bright line is reduced to the original output brightness
Wherein K is more than 1.
5. The display method according to claim 4, wherein K is 1 < K.ltoreq.3, and K is an integer.
6. The display method according to claim 4, wherein the original line width of the outline bright line is equal to A times of the size of the sub-pixel, and the line width of the outline bright line after the thickening is equal to B times of the size of the sub-pixel, wherein A and B are positive integers, and B > A.
7. A display apparatus for performing the display method according to any one of claims 1 to 6, comprising:
the image receiving module is used for acquiring an image to be displayed;
the contour extraction module is used for extracting a contour bright line of the image to be displayed and acquiring a gray scale peak value Y1 of the contour bright line;
the condition judgment module is used for judging whether the gray scale peak value Y1 is smaller than a preset gray scale value Y0;
the first output data determination module is used for increasing the gray scale peak value Y1 and increasing the gray scale values of other sub-pixels of the contour bright line in the display panel when the gray scale peak value Y1 is smaller than a preset gray scale value Y0; and reducing the output brightness of the backlight subarea corresponding to the outline bright line.
8. The display device according to claim 7, wherein the first output data determination module increases the gray scale peak value Y1 and increases gray scale values of other sub-pixels of the contour bright line in the display panel; and reducing the output brightness of the backlight subarea corresponding to the outline bright line comprises the following steps: increasing the gray scale peak value Y1 to the preset gray scale value Y0, and increasing the brightness values of other sub-pixels of the contour bright line in the display panel to M times of the original brightness value;
and reducing the output brightness of the backlight subarea corresponding to the outline bright line to the original output brightness
Wherein the value range of gamma is more than or equal to 1.9 and less than or equal to 2.5.
9. The display device according to claim 7, further comprising a second output data determination sub-module;
the second output data determination submodule is used for thickening the line width of the outline bright line to K times of the original line width when the gray scale peak value Y1 is not less than a preset gray scale value Y0, and the second output data determination submodule is used for thickening the line width of the outline bright line to K times of the original line widthThe output brightness of the backlight subarea corresponding to the outline bright line is reduced to the original output brightness
Wherein K is more than 1.
10. The display device according to claim 9, further comprising a parameter storage module electrically connected to the condition determination module;
the parameter storage module is used for storing the preset gray-scale value Y0 and the preset gray-scale value K.
11. The display device according to claim 9, wherein the display panel comprises a plurality of sub-pixels distributed in an array;
the original line width of the outline bright line is equal to A times of the size of the sub-pixel, the line width of the outline bright line after thickening is equal to B times of the size of the sub-pixel, wherein A and B are positive integers, and B is larger than A.
12. The display device as claimed in claim 7, wherein the preset gray scale value Y0 is the highest gray scale value.
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