CN115762380A - Display method and display device - Google Patents
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Abstract
The application discloses a display method and a display device. The display method comprises the following steps: acquiring display data of a picture to be displayed; respectively obtaining original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel in a preset area according to the display data; determining a gray scale relation among the red sub-pixels, the green sub-pixels and the blue sub-pixels in the preset area according to the original gray scale; respectively enabling the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area to be displayed according to the original gray scale, the first display gray scale or the second display gray scale of the sub-pixel based on the gray scale relation; wherein each of the original gray scales corresponds to one of the first display gray scale and one of the second display gray scale. The display method and the display device can further improve the color cast of the visual angle under the condition of not additionally increasing the second display gray scale ratio, and improve the display effect.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display method and a display apparatus.
Background
With the development of display technology, the resolution of the display panel is gradually improved. At present, the resolution of the display panel has reached more than 8K (7680 × 4320), and under the condition that the size of the display panel is not changed, the aperture ratio is reduced due to the increase of the resolution, thereby reducing the transmittance of the display panel. Therefore, the 8-Domain pixel architecture originally used for improving the viewing angle characteristics cannot be applied to higher resolution products due to the transmittance loss, and is replaced by the 4-Domain pixel architecture, but the viewing angle characteristics are also deteriorated, and the problem of viewing angle color shift is caused.
Disclosure of Invention
The application provides a display method and a display device, which are used for solving the technical problem that a display panel has visual angle color cast and improving the display effect.
The present application provides a display method, comprising:
acquiring display data of a picture to be displayed;
respectively obtaining original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel in a preset area according to the display data;
determining a gray scale relation among the red sub-pixels, the green sub-pixels and the blue sub-pixels in the preset area according to the original gray scale;
respectively enabling the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area to be displayed according to the original gray scale, the first display gray scale or the second display gray scale of the sub-pixel based on the gray scale relation; wherein each of the original gray scales corresponds to one of the first display gray scales and one of the second display gray scales.
Optionally, in some embodiments of the present application, the step of determining a gray scale relationship among the red sub-pixel, the green sub-pixel, and the blue sub-pixel in the preset region according to the original gray scale includes:
if the preset area comprises the red sub-pixel, the green sub-pixel and the blue sub-pixel, comparing the size relationship among the original gray scale of the red sub-pixel, the original gray scale of the green sub-pixel and the original gray scale of the blue sub-pixel;
if the predetermined area includes a plurality of red sub-pixels, a plurality of green sub-pixels and a plurality of blue sub-pixels, comparing the magnitude relationship between the arithmetic parameters of the original gray scales corresponding to the red sub-pixels, the arithmetic parameters of the original gray scales corresponding to the green sub-pixels and the arithmetic parameters of the original gray scales corresponding to the blue sub-pixels.
Optionally, in some embodiments of the present application, the number of the red sub-pixels, the number of the green sub-pixels, and the number of the blue sub-pixels in the preset region are the same.
Optionally, in some embodiments of the application, the step of respectively displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset region according to the original gray scale, the first display gray scale or the second display gray scale based on the gray scale relationship includes:
if the gray scale relationship is that the original gray scale of the red sub-pixel is larger than that of the green sub-pixel, and the original gray scale of the green sub-pixel is larger than or equal to that of the blue sub-pixel; and determining that the red sub-pixel is displayed according to the original gray scale, and the green sub-pixel and the blue sub-pixel are respectively displayed according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel.
Optionally, in some embodiments of the present application, the step of respectively displaying the red sub-pixel, the green sub-pixel, and the blue sub-pixel in the preset region according to the original gray scale, the first display gray scale, or the second display gray scale based on the gray scale relationship includes:
if the gray scale relationship is that the original gray scale of the green sub-pixel is larger than that of the red sub-pixel, and the original gray scale of the green sub-pixel is larger than or equal to that of the blue sub-pixel; and determining that the green sub-pixel is displayed according to the original gray scale, and displaying the red sub-pixel and the blue sub-pixel according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel respectively.
Optionally, in some embodiments of the present application, the step of respectively displaying the red sub-pixel, the green sub-pixel, and the blue sub-pixel in the preset region according to the original gray scale, the first display gray scale, or the second display gray scale based on the gray scale relationship includes:
if the gray scale relationship is that the original gray scale of the blue sub-pixel is larger than or equal to the original gray scale of the green sub-pixel, the original gray scale of the green sub-pixel is larger than the original gray scale of the red sub-pixel; and determining that the blue sub-pixel is displayed according to the original gray scale, and displaying the red sub-pixel and the green sub-pixel according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel respectively.
Optionally, in some embodiments of the present application, the step of respectively displaying the red sub-pixel, the green sub-pixel, and the blue sub-pixel in the preset region according to the original gray scale, the first display gray scale, or the second display gray scale based on the gray scale relationship includes:
if the gray scale relationship is that the original gray scale of the green sub-pixel is smaller than that of the red sub-pixel, and the original gray scale of the green sub-pixel is smaller than or equal to that of the blue sub-pixel; and determining that the red sub-pixel and/or the blue sub-pixel are displayed according to the original gray scale, and the green sub-pixel is displayed according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel.
Optionally, in some embodiments of the application, the step of respectively displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset region according to the original gray scale, the first display gray scale or the second display gray scale based on the gray scale relationship includes:
if the gray scale relationship is that the original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel are equal; and determining that the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively displayed by the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel.
Optionally, in some embodiments of the present application, the original gray scale of the red sub-pixel, the green sub-pixel, or the blue sub-pixel displayed with the original gray scale is smaller than a preset gray scale.
Optionally, in some embodiments of the present application, for the same original gray scale, the first display gray scale is larger than the original gray scale, and the second display gray scale is smaller than the original gray scale.
Optionally, in some embodiments of the application, the second display gray scale includes N sub gray scales, where the N sub gray scales are not equal to each other, and N is an integer greater than or equal to 2.
Optionally, in some embodiments of the present application, the second display gray scale includes a first display sub gray scale, a second display sub gray scale and a third display sub gray scale;
for the same original gray scale, the first display gray scale is greater than or equal to the first display sub gray scale, the first display sub gray scale is greater than or equal to the second display sub gray scale, and the second display sub gray scale is greater than or equal to the third display sub gray scale.
Optionally, in some embodiments of the present application, the display method further includes:
setting the ratio of the number of the sub-pixels displayed by the first display gray scale to the number of the sub-pixels displayed by the second display gray scale in the display panel to be 1 to 1.
Optionally, in some embodiments of the present application, the preset area further includes a specific color sub-pixel, and the specific color sub-pixel displays the first display gray scale or the second display gray scale corresponding to an original gray scale of the specific color sub-pixel.
Correspondingly, the application also provides a display device, which comprises a display panel and a time schedule controller, wherein the display panel adopts the display method as described in any one of the above methods to display; and the time sequence controller is used for acquiring the display data and determining the gray scale relation according to the display data.
The application discloses a display method and a display device. The display method provided by the application adjusts the gray scale driving modes of the red sub-pixel, the green sub-pixel and the blue sub-pixel according to the gray scale relation of the red sub-pixel, the green sub-pixel and the blue sub-pixel in a preset area, so that the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively displayed by the original gray scale of the sub-pixel, the first display gray scale or the second display gray scale; therefore, on the basis of adopting a viewing angle color shift compensation algorithm of the first display gray scale and the second display gray scale, at least one of the red sub-pixel, the green sub-pixel and the blue sub-pixel is driven by the original gray scale, so that the color difference of a display picture in a side view and a front view can be further reduced, the viewing angle color shift is further improved under the condition that the proportion of the second display gray scale is not additionally increased, and the display effect is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of an initial front-view gamma curve and an initial side-view gamma curve of a display panel provided in the present application;
FIG. 2 is a schematic diagram of a first structure of a display panel provided in the present application;
FIG. 3 is a schematic diagram of a second structure of a display panel provided in the present application;
FIG. 4 is a schematic view of a gamma curve before and after color shift improvement provided herein;
FIG. 5 is a schematic diagram of the display method provided herein;
FIG. 6 is a schematic flow chart of a display method provided herein;
FIG. 7 is a side view luminance curve before and after color shift improvement provided by the present application;
FIG. 8 is a diagram illustrating a relationship between an original gray scale, a first display gray scale and a second display gray scale provided by the present application;
fig. 9 is a schematic structural diagram of a display device provided in the present application.
Detailed Description
The technical solutions in 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 obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying a number of the indicated technical features. Thus, features defined as "first" and "second", etc. may explicitly or implicitly include one or more of the described features and are therefore not to be construed as limiting the application. Further, the term "plurality" refers to two or more.
The present application provides a display method and a display device, which are described in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments in this application.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating an initial front-view gamma curve and an initial side-view gamma curve of a display panel provided by the present application. Wherein, curve A represents an initial front-view gamma curve, namely a front-view gamma curve which does not pass through a visual character offset compensation algorithm; curve E represents the initial side view gamma curve, i.e., the side view gamma curve that has not undergone the character bias compensation algorithm.
Comparing the initial front-view gamma curve a with the initial side-view gamma curve E, taking the skin color common to asians as an example, in the display panel, the original gray-scale values of the three primary colors RGB measured during front-view skin color pictures are R =220, g =150, and b =100, respectively; the original RGB grayscale values measured in the side view of the skin color screen are R =215, g =192, and b =176, respectively. It can be known that, for the same display image, the original gray levels of RGB change in front view and side view, and the gamma curve shifts, thereby causing color shift.
To solve the color shift problem, in the related art, the applicant replaces the original gray levels of the sub-pixels in the effective display area of the display panel with a relatively high gray level (the first display gray level H) and a relatively low gray level (the second display gray level L). In the side view, since the L-state sub-pixels reduce the side view luminance variation, the larger the number of L-state sub-pixels, the better the color shift improvement. In the 4-Domain pixel architecture, a visual angle compensation algorithm (for example, H: L = 1.
Wherein, if the image display data input into the display panel is binary 8bit, 2 will be generated 8 The original gray scale of brightness from darkest to brightest. That is, 256 levels of different brightness gray levels (for example, written as 0 th gray level to 255 th gray level) are generated. Any one of the 0 th gray scale to the 255 th gray scale may be referred to as an original gray scale. Each original gray scale corresponds to a first display gray scale and a second display gray scale. Of course, the image display data received by the display panel of the present application may also be binary 6bit, binary 10bit, or the like.
Specifically, please refer to fig. 2-4, fig. 2 is a schematic view of a first structure of a display panel provided in the present application; FIG. 3 is a schematic diagram of a second structure of a display panel provided in the present application; fig. 4 is a schematic diagram of a gamma curve before and after color shift improvement provided by the present application.
As shown in fig. 2, in the display panel, all the sub-pixels in the display panel are set to display at the first display gray scale and the second display gray scale, and the number ratio of the sub-pixels displaying at the first display gray scale and the second display gray scale is 1.
As shown in fig. 3, in the display panel, it is set that all the sub-pixels in the display panel display at the first display gray scale and the second display gray scale, and the number ratio of the sub-pixels displaying at the first display gray scale and the second display gray scale is 1.
It should be noted that the original gray scale refers to the brightness level generated after the sub-pixels are controlled by power-on, and the pixel arrangement structures of the display panels in fig. 2 and 3 are both the arrangement structures after the sub-pixels are powered on. Fig. 2 shows only one pixel arrangement when H: L =1, and fig. 3 shows only one pixel arrangement when H: L = 1.
As shown in fig. 4, the curve C represents a side-view gamma curve when H: L = 1. Curve D represents the side view gamma curve when H: L = 1. It is known that the higher the ratio of the second display gray scale is, the smaller the difference between the side-view brightness and the front-view brightness is, and the better the color shift improvement degree is. However, if the viewing angle color shift improvement effect is further improved, the number of sub-pixels displayed in the second display gray scale must be increased, so that the image quality is significantly grainy and the display quality is degraded.
In view of this, the embodiment of the present application provides a novel display method. Firstly, taking display data of a picture to be displayed; secondly, respectively obtaining original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area according to the display data; then, determining a gray scale relation among the red sub-pixels, the green sub-pixels and the blue sub-pixels in the preset area according to the original gray scale; finally, respectively displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area by the original gray scale, the first display gray scale or the second display gray scale of the sub-pixels based on the gray scale relation; wherein each original gray scale corresponds to a first display gray scale and a second display gray scale.
The definition of the original gray scale, the first display gray scale and the second display gray scale can refer to the above embodiments, and are not described herein again.
The number ratio of the sub-pixels displayed by the first display gray scale or the second display gray scale can be set according to actual requirements. For example, for the sub-pixels of the same color, the ratio of the number of sub-pixels displayed at the first display gray scale to the number of sub-pixels displayed at the second display gray scale may be 1.
According to the embodiment of the application, the gray scale driving modes of the red sub-pixel, the green sub-pixel and the blue sub-pixel are adjusted according to the gray scale relation of the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area, so that the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively displayed by an original gray scale, a first display gray scale or a second display gray scale; therefore, on the basis of adopting a visual angle color cast compensation algorithm of the first display gray scale and the second display gray scale, at least one of the red sub-pixel, the green sub-pixel and the blue sub-pixel is driven by the original gray scale, so that the color difference of a display picture in a side view and a front view can be further reduced, the color cast is further improved under the condition that the proportion of the second display gray scale is not additionally increased, and the display effect is improved.
It is understood that the Lab model is a new color system established by CIE (Commission International Eclairage) on the basis of the RGB system. There are three-dimensional coordinates in the Lab model: l, a and b. Where the L component represents luminance and the a, b components represent two color channels. The a component represents the range from red to green; the b component represents the range from yellow to blue. In addition, since it is impossible to tune (match) all colors existing in the natural world from RGB three primary color light selected from an actual spectrum, the CIE theoretically assumed three primary colors, i.e., theoretical three primary colors, that do not exist in the natural world in 1931. The stimulus quantities of these three theoretical primary colors are denoted by X, Y and Z, respectively, the so-called tristimulus values. And the a, b components have the following relation with XYZ tristimulus values:
a＝500 1/3 {(X/Xn) 1/3 -(Y/Yn) 1/3 }，
b＝200 1/3 {(Y/Yn) 1/3 -(Z/Zn) 1/3 }，H＝tan -1 b/a，dC＝C side view /C Front view ；
Where C is saturation, H is hue, xn, yn, and Zn are CIE XYZ tristimulus values for the reference white point, and dC represents the degree of difference in color between side and front views. In the characteristics of a Vertical Alignment (VA) display panel, generally, color dots move to the origin in a side view, i.e., a color shift phenomenon occurs. To improve color shift, the side-view C value can be increased. The value of a/b can be increased according to the relation, so that the C value under the side view can be improved. And according to the relationship between the Lab model and the RGB given above, the following seven regulation relationships can be obtained:
adjustment relationship 1: when the original gray scale of the red sub-pixel is larger than that of the green sub-pixel, and the original gray scale of the green sub-pixel is larger than or equal to that of the blue sub-pixel (R is larger than G and is larger than B), X is larger than Y and larger than Z. In this case, dC can be raised by increasing the X stimulus value or decreasing the Z stimulus value.
Adjustment relationship 2: when the original gray scale of the red sub-pixel is larger than or equal to that of the blue sub-pixel and the original gray scale of the blue sub-pixel is larger than that of the green sub-pixel (R is larger than or equal to B and larger than G), X is larger than Z and larger than Y. In this case, dC can be raised by increasing the X stimulus value and the Z stimulus value or decreasing the Y stimulus value.
Adjustment relationship 3: when the original gray scale of the green sub-pixel is larger than or equal to that of the red sub-pixel and the original gray scale of the red sub-pixel is larger than that of the blue sub-pixel (G is larger than or equal to R and larger than B), Y is larger than X and larger than Z. At this time, dC can be increased by increasing the Y stimulus value or decreasing the X stimulus value and the Z stimulus value.
Adjustment relationship 4: when the original gray scale of the green sub-pixel is larger than that of the blue sub-pixel and the original gray scale of the blue sub-pixel is larger than or equal to that of the red sub-pixel (G > B ≧ R), Y > Z > X. At this time, dC can be increased by increasing the Y stimulus value or decreasing the X stimulus value and the Z stimulus value.
The regulation relation 5: when the original gray scale of the blue sub-pixel is larger than or equal to that of the green sub-pixel and the original gray scale of the green sub-pixel is larger than that of the red sub-pixel (B is larger than or equal to G and R), Z is larger than Y and larger than X. At this time, dC can be increased by increasing the Z stimulus value or decreasing the X stimulus value and the Y stimulus value.
The regulation relationship 6: when the original gray scale of the blue sub-pixel is larger than that of the red sub-pixel, and the original gray scale of the red sub-pixel is larger than or equal to that of the green sub-pixel (B > R is larger than or equal to G), Z > X > Y. In this case, dC can be raised by increasing the X stimulus value and the Z stimulus value or decreasing the Y stimulus value.
The regulation relation 7: when the original gray scales of the blue sub-pixel, the red sub-pixel and the green sub-pixel are equal, the blue sub-pixel, the red sub-pixel and the green sub-pixel form white. In this case, it is not necessary to adjust the XYZ tristimulus values.
It is understood that the CIE-XYZ spectral tristimulus values are mathematically transformed from CIE-RGB spectral tristimulus values. And the XYZ tristimulus value is a chromaticity value proportional to the intensity of light. The larger the original gray scale is, the higher the luminance is, and the larger the XYZ tristimulus value is. Therefore, the magnitude relation of the XYZ tristimulus values can be judged through the magnitude relation between the original gray scales corresponding to the RGB sub-pixels, and the XYZ tristimulus values are adjusted through the seven adjustment relations, so that the purpose of increasing dC is achieved, and the color cast of the visual angle is improved.
Further, as shown in fig. 5, a curve a represents an initial front-view gamma curve, a curve E represents an initial side-view gamma curve, and a curve D represents a side-view gamma curve when H: L = 1. It should be noted that, when H: L =1, the front-view gamma curve is substantially coincident with the initial front-view gamma curve; that is, the influence on the brightness of the display can be ignored after the visual angle color cast compensation algorithm of the first display gray scale and the second display gray scale is adopted.
It can be known that, when the viewing angle color cast compensation mode of H: L =1 = 3 is adopted, the side-view brightness has no further reduced space, and the difference between the side-view brightness and the front-view brightness cannot be reduced any more; the side viewing brightness cannot be reduced without increasing more sub-pixels displayed in the second display gray scale. Therefore, only the operation space of brightness improvement is left in the seven adjustment relationships of improving dC.
For example, if (R, G, B) = (115, 82, 68), if R > G ≧ B is satisfied, the X stimulus value is increased or the Z stimulus value is decreased, and dC can be raised. As can be seen from the above, since XYZ tristimulus values are proportional to the intensity of light, the X stimulus value can be increased by increasing the luminance of the R sub-pixel, but the luminance of the GB sub-pixel cannot be decreased any more and the Z stimulus value cannot be decreased. According to the curve E and the curve D, when the R sub-pixel does not adopt the viewing angle color shift compensation algorithm of the first display gray scale and the second display gray scale (i.e., the R sub-pixel displays with its original gray scale), the side viewing brightness of the R sub-pixel can be greatly improved, i.e., the ratio of the X stimulus value in the side viewing is increased, the dC is effectively improved, and the color shift is further improved.
Therefore, in the embodiment of the present application, on one hand, the corresponding sub-pixels are driven by the first display gray scale or the second display gray scale, and the color shift is improved by reducing the brightness variation degree by the second display gray scale. On the other hand, under the condition that the proportion of the second display gray scale is not additionally increased, the dC value of the display picture can be improved by driving the corresponding sub-pixel through the original gray scale, the color cast is further improved, and the display effect is improved. On the basis of effectively improving the color cast, the granular sensation which cannot be accepted by consumers due to the fact that the ratio of the second display gray scale is excessively increased can be avoided.
As described in detail below.
Referring to fig. 6, fig. 6 is a schematic flow chart of a display method provided in the present application. As shown in fig. 6, the display method includes the steps of:
101. and acquiring display data of a picture to be displayed.
The display data comprises the original gray scale required to be displayed by each sub-pixel in the display panel in the picture to be displayed. Specifically, the image data may be obtained from the system chip by a time sequence controller (TCON), and the image data may be analyzed to obtain display data of each frame of display image of the display panel.
102. And respectively obtaining the original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area according to the display data.
Specifically, after the display data of the display panel is acquired, the original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset region can be obtained respectively according to the range division of the preset region.
The range of the preset area can be set according to actual requirements. For example, in some embodiments, each predetermined area may be a pixel unit. Each pixel unit comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel. For another example, in some embodiments, each of the predetermined regions may include a plurality of red sub-pixels, a plurality of green sub-pixels, and a plurality of blue sub-pixels.
103. And determining the gray scale relation among the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area according to the original gray scale.
Specifically, in some embodiments of the present application, the step of obtaining the gray scale relationship corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area according to the display data may include the following steps:
if the preset area comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel, the original gray scale of the red sub-pixel, the original gray scale of the green sub-pixel and the original gray scale of the blue sub-pixel are directly compared to obtain the original gray scale size relationship among the red sub-pixel, the green sub-pixel and the blue sub-pixel.
If the predetermined area includes a plurality of red sub-pixels, a plurality of green sub-pixels, and a plurality of blue sub-pixels, it is required to calculate an arithmetic parameter of an original gray level of the plurality of red sub-pixels, a sum of the original gray levels of the plurality of green sub-pixels, and an arithmetic parameter of the original gray level of the plurality of blue sub-pixels, and then compare magnitude relations among the arithmetic parameters of the original gray levels of the plurality of red sub-pixels, the arithmetic parameters of the original gray levels of the plurality of green sub-pixels, and the arithmetic parameters of the original gray levels of the plurality of blue sub-pixels.
Wherein, the arithmetic parameter may be: and, arithmetic mean, geometric mean, squared mean (root mean square mean, rms), harmonic mean, weighted mean, and the like.
In some embodiments, the numbers of the red sub-pixels, the green sub-pixels and the blue sub-pixels in each of the predetermined regions are all equal, so that the overall compensation effect of the display panel is better after the color cast compensation is performed on the plurality of predetermined regions.
Of course, in some embodiments, the number of red sub-pixels, green sub-pixels and blue sub-pixels in each preset region may not be equal; therefore, the average value of the original gray levels of the red sub-pixels, the average value of the original gray levels of the green sub-pixels and the average value of the original gray levels of the blue sub-pixels can be compared, so that the accuracy of the visual angle compensation is improved.
The following embodiments of the present application are described by taking the example that the predetermined area includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, but the present application is not limited thereto.
104. And respectively displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area by using the original gray scale, the first display gray scale or the second display gray scale of the sub-pixel based on the gray scale relation.
After the gray scale relationship among the red sub-pixel, the green sub-pixel and the blue sub-pixel is obtained according to step 102, the adjustment requirements of the X stimulus value, the Y stimulus value and the Z stimulus value are respectively determined by combining the seven adjustment relationships given in the above embodiments, so as to respectively determine whether the red sub-pixel, the green sub-pixel and the blue sub-pixel are displayed according to the original gray scale, the first display gray scale or the second display gray scale of the sub-pixel.
Specifically, in some embodiments of the present application, step 104 includes:
if the gray scale relationship is that the original gray scale of the red sub-pixel is larger than that of the green sub-pixel, and the original gray scale of the green sub-pixel is larger than or equal to that of the blue sub-pixel; and determining that the red sub-pixel is displayed by the original gray scale, and displaying the green sub-pixel and the blue sub-pixel by the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel respectively.
Specifically, because R > G ≧ B, if dC is to be improved, the X stimulus value needs to be improved, i.e., the brightness of the red sub-pixel needs to be improved. According to the curve E and the curve D, the red sub-pixel is displayed in the original gray scale, and the brightness of the red sub-pixel in the side view can be improved, that is, the ratio of the X stimulus value in the side view is increased, so that dC is effectively improved. Meanwhile, the second sub-pixel and the third sub-pixel are respectively displayed by the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel, so that the difference between the side-view brightness and the front-view brightness can be reduced, and the color cast of the viewing angle is further improved.
In some embodiments of the present application, step 104 comprises:
if the gray scale relationship is that the original gray scale of the green sub-pixel is larger than that of the red sub-pixel, and the original gray scale of the green sub-pixel is larger than that of the blue sub-pixel; and determining that the green sub-pixel is displayed according to the original gray scale, and displaying the red sub-pixel and the blue sub-pixel according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel respectively.
Specifically, the original gray scale of the green sub-pixel is greater than that of the red sub-pixel, and the original gray scale of the green sub-pixel is greater than that of the blue sub-pixel.
In the first case: the original gray scale of the green sub-pixel is larger than or equal to that of the red sub-pixel, and the original gray scale of the red sub-pixel is larger than that of the blue sub-pixel (G is larger than or equal to R and larger than B). In the second case: the original gray scale of the green sub-pixel is larger than that of the blue sub-pixel, and the original gray scale of the blue sub-pixel is larger than or equal to that of the red sub-pixel (G > B ≧ R).
Under the above gray scale relationship: if we want to increase dC, we need to increase the Y stimulus value, i.e. increase the brightness of the green sub-pixel. According to the curve E and the curve D, when the green sub-pixel is displayed with the original gray scale, the brightness of the green sub-pixel in the side view can be improved, that is, the ratio of the X stimulus value in the side view is increased, so that dC is effectively improved. Meanwhile, the first sub-pixel and the third sub-pixel are respectively displayed by the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel, so that the difference between the side-view brightness and the front-view brightness can be reduced, and the color cast of the viewing angle is further improved.
In some embodiments of the present application, step 104 comprises:
if the gray scale relationship is that the original gray scale of the blue sub-pixel is larger than or equal to that of the green sub-pixel, the original gray scale of the green sub-pixel is larger than that of the red sub-pixel; and determining that the blue sub-pixel is displayed according to the original gray scale, and displaying the red sub-pixel and the green sub-pixel according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel respectively.
Specifically, because B ≧ G > R, if dC is desired to be boosted, the Z stimulus value needs to be increased, that is, the brightness of the blue subpixel needs to be increased. According to the curve E and the curve D, the blue sub-pixel is displayed in the original gray scale, and the brightness of the blue sub-pixel in the side view can be improved, that is, the ratio of the Z stimulus value in the side view is increased, so that dC is effectively improved. Meanwhile, the red sub-pixel and the green sub-pixel are respectively displayed by the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel, so that the difference between the side-view brightness and the front-view brightness can be reduced, and the color cast of the viewing angle is further improved.
In some embodiments of the present application, step 104 comprises:
if the gray scale relationship is that the original gray scale of the green sub-pixel is smaller than that of the red sub-pixel, and the original gray scale of the green sub-pixel is smaller than that of the blue sub-pixel; and determining that the red sub-pixel and the blue sub-pixel are displayed by the original gray scale, and the green sub-pixel is displayed by the first display gray scale or the second display gray scale.
Specifically, the original gray scale of the green sub-pixel is smaller than that of the red sub-pixel, and the original gray scale of the green sub-pixel is smaller than that of the blue sub-pixel includes two cases.
In the first case: the original gray scale of the red sub-pixel is larger than or equal to that of the blue sub-pixel, and the original gray scale of the blue sub-pixel is larger than that of the green sub-pixel (R is larger than or equal to B and larger than G). In the second case: the original gray scale of the blue sub-pixel is larger than that of the red sub-pixel, and the original gray scale of the red sub-pixel is larger than or equal to that of the green sub-pixel (B > R ≧ G).
Under the gray scale relation: to increase dC, the X stimulus value and/or the Z stimulus value are increased, i.e. the brightness of the red sub-pixel and/or the brightness of the blue sub-pixel are increased. According to the curve E and the curve D, the red sub-pixel is displayed in the original gray scale, and the brightness of the red sub-pixel in the side view can be improved, that is, the ratio of the X stimulus value in the side view is increased, so that dC is effectively improved. Similarly, the blue sub-pixel is displayed by the original gray scale, so that the brightness of the blue sub-pixel in the side view can be improved, the occupation ratio of the Z stimulus value in the side view is increased, and the dC is effectively improved. Meanwhile, the green sub-pixels are displayed by the first display gray scale or the second display gray scale, so that the difference between the side-looking brightness and the front-looking brightness can be reduced, and the color cast of the viewing angle is further improved.
In some embodiments of the present application, step 104 comprises:
if the gray scale relationship is that the original gray scales of the red sub-pixel, the green sub-pixel and the blue sub-pixel are equal; and determining that the red sub-pixel, the green sub-pixel and the blue sub-pixel are displayed according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel.
It is understood that when the original gray levels of the red, green, and blue sub-pixels are equal, dC cannot be boosted by adjusting the XYZ tristimulus values. Therefore, under the gray scale relationship, the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively displayed according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel, so that the character bias is compensated by utilizing the characteristic that the brightness change degree is reduced by the second display gray scale.
Further, in some embodiments of the present disclosure, the original gray scale of the red sub-pixel, the green sub-pixel, or the blue sub-pixel displayed by the original gray scale is smaller than a predetermined gray scale.
Specifically, please refer to fig. 5 and 7, fig. 7 is a schematic diagram of a side-view luminance curve before and after the color shift improvement provided by the present application. Wherein, curve M is an initial side-view luminance curve, and curve N is a side-view luminance curve when H: L = 1. The difference between the curve M and the curve E is that the curve E is obtained by performing the luminance normalization process on the curve M. It should be noted that fig. 7 only illustrates the side-view luminance of red (the green, blue and red are the same rule), and the front-view luminance is usually much higher than the side-view luminance and is not shown in the same figure.
It can be seen that, in fig. 7, when the gray scale is less than or equal to 180, the luminance of the sub-pixel displayed in the gray scale is greater than the luminance of the sub-pixel displayed in H: L = 1. When the gray scale is larger than 180, the luminance of the sub-pixel displayed in the gray scale is substantially equal to the luminance of the sub-pixel displayed in H: L = 1. It can be seen from the above embodiments that, increasing the dC value requires increasing the luminance of the sub-pixel, and further increasing the XYZ tristimulus values, and when the gray scale is greater than 180, the luminance of the sub-pixel cannot be further increased after the color shift compensation method of H: L = 1. Therefore, the original gray scales of the red sub-pixel, the green sub-pixel or the blue sub-pixel displayed by the original gray scales are all less than 180. When the original gray scales of the red sub-pixel, the green sub-pixel and the blue sub-pixel are all larger than 180, the red sub-pixel, the green sub-pixel and the blue sub-pixel are all displayed by the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel. Therefore, the gray scale driving mode does not need to be adjusted, and the driving power consumption can be reduced.
It should be noted that, in the embodiment of the present application, the image display data input to the display panel is binary 8bit for illustration, and the preset gray scale may be 180. In other image display data specifications, the preset gray scale may be other gray scales, which is not specifically limited in this application.
It should be noted that, in some embodiments of the present application, the preset area further includes a specific color sub-pixel. The specific color sub-pixels are displayed according to the first display gray scale or the second display gray scale corresponding to the original gray scale.
The specific color sub-pixel does not participate in the comparison of the original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel. The specific color sub-pixel may be a white sub-pixel or other color sub-pixels that can improve the display effect.
When the VA display panel adopts a View Angle Compensation (VAC) debugging method in combination with a multi-domain (four-domain, eight-domain) pixel structure to improve the side-View brightness effect, the specific color sub-pixels are set as white sub-pixels, so that a better improvement effect can be achieved.
In some embodiments of the present application, the display method further comprises the steps of:
105. setting the ratio of the number of the sub-pixels displayed in the first display gray scale to the number of the sub-pixels displayed in the second display gray scale in the display panel to be 1.
It can be understood that, on the basis of the viewing angle color shift compensation algorithm adopting the first display gray scale and the second display gray scale, the embodiment of the application improves the color shift by combining the manner of improving dC. Therefore, before the XYZ tristimulus value adjustment manner is determined according to the gray scale relationship, the ratio of the number of the sub-pixels displayed by the first display gray scale and the second display gray scale among all the red sub-pixels, the green sub-pixels and the blue sub-pixels in the display panel can be set. After the gray scale relationship is obtained, only the driving mode of the sub-pixel of the corresponding color is adjusted.
The ratio of the number of sub-pixels to be displayed at the first display gray scale to the number of sub-pixels to be displayed at the second display gray scale may be 1 to 1, for example, H: L = 1.
Specifically, in some embodiments, for the same original gray level, the first display gray level is greater than the original gray level, and the second display gray level is less than the original gray level. If the sub-pixel displays the original gray scale, the brightness of the sub-pixel is the first brightness; the sub-pixel takes the luminous brightness of the first display gray scale corresponding to the original gray scale as the second brightness when displaying; the luminance of the sub-pixel displayed by the second display gray scale corresponding to the original gray scale is a third luminance; the sum of the second luminance and the third luminance is 2 times the first luminance. Therefore, the front brightness of the display panel can be guaranteed not to be affected.
In some embodiments, the second display gray scale includes N sub gray scales, and the N sub gray scales are not equal to each other. N is an integer greater than or equal to 2. For example, N is 2, 3, 4, etc., which are not listed here. Therefore, the difference value between the relatively high gray scale and the relatively low gray scale can be further pulled, and the visual angle of the display panel is further improved.
Specifically, please refer to fig. 8, fig. 8 is a schematic diagram illustrating a relationship between an original gray level, a first display gray level and a second display gray level provided in the present application. The second display gray scale includes a first display sub gray scale (L1), a second display sub gray scale (L2) and a third display sub gray scale (L3).
For the same original gray scale, the first display gray scale (H) is larger than or equal to the original gray scale, the first display gray scale is larger than or equal to the first display sub gray scale, the first display sub gray scale is larger than or equal to the second display sub gray scale, and the second display sub gray scale is larger than or equal to the third display sub gray scale.
Of course, fig. 8 only shows one magnitude relationship among the original gray scale, the first display gray scale and the second display gray scale. In the embodiment of the application, the relationship between the gray scale values of the first display sub-gray scale, the second display sub-gray scale and the third display sub-gray scale can be adjusted according to actual needs. For example, the first display sub-gray scale is greater than the second display sub-gray scale, and the second display sub-gray scale is greater than the third display sub-gray scale.
Therefore, according to the display panel, one original gray scale is replaced by one relatively high gray scale and three relatively low gray scales, and the difference value between the relatively high gray scale and the relatively low gray scale is further pulled away, so that the visual angle of the display panel is further improved.
Correspondingly, referring to fig. 9, the present application further provides a display device 100. The display device 100 includes a display panel 10 and a timing controller 20. The display panel 10 performs display by using the driving method described in any of the above embodiments. The timing controller 20 is connected to the display panel 10. The timing controller 20 is used for acquiring display data and determining the gray scale relationship according to the display data.
The timing controller 20 may obtain image data from the system chip, and analyze the image data to obtain display data of each frame of display image of the display panel; and then determining the gray scale relation of the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area according to the display data.
In the display device 100 provided in the embodiment of the present application, the gray scale driving manners of the red sub-pixel, the green sub-pixel and the blue sub-pixel are adjusted according to the gray scale relationship of the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset region of the display panel 10, so that the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively displayed in the original gray scale, the first display gray scale or the second display gray scale; therefore, on the basis of adopting a viewing angle color shift compensation algorithm of the first display gray scale and the second display gray scale, at least one of the red sub-pixel, the green sub-pixel and the blue sub-pixel is driven by the original gray scale, so that the color difference of a display picture in a side view and a front view can be further reduced, the viewing angle color shift is further improved under the condition that the proportion of the second display gray scale is not additionally increased, and the display effect is improved.
The display method and the display device provided by the embodiment of the present application are described in detail above, and the principle and the embodiment of the present application are explained in the present application by applying specific examples, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (15)
1. A display method for driving a display panel for display, the display method comprising:
acquiring display data of a picture to be displayed;
respectively obtaining original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel in a preset area according to the display data;
determining a gray scale relation among the red sub-pixels, the green sub-pixels and the blue sub-pixels in the preset area according to the original gray scale;
respectively enabling the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset area to be displayed according to the original gray scale, the first display gray scale or the second display gray scale of the sub-pixel based on the gray scale relation; wherein each of the original gray scales corresponds to one of the first display gray scales and one of the second display gray scales.
2. The method according to claim 1, wherein the step of determining the gray scale relationship among the red sub-pixel, the green sub-pixel and the blue sub-pixel in the preset region according to the original gray scale comprises:
if the preset area comprises the red sub-pixel, the green sub-pixel and the blue sub-pixel, comparing the size relationship among the original gray scale of the red sub-pixel, the original gray scale of the green sub-pixel and the original gray scale of the blue sub-pixel;
if the preset area comprises a plurality of red sub-pixels, a plurality of green sub-pixels and a plurality of blue sub-pixels, comparing the magnitude relation among the arithmetic parameters of the original gray scales corresponding to the red sub-pixels, the arithmetic parameters of the original gray scales corresponding to the green sub-pixels and the arithmetic parameters of the original gray scales corresponding to the blue sub-pixels.
3. The method according to claim 2, wherein the number of the red sub-pixels, the green sub-pixels and the blue sub-pixels in the predetermined area is the same.
4. The method according to claim 1, wherein the step of displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the predetermined region with the original gray scale, the first display gray scale or the second display gray scale based on the gray scale relationship comprises:
if the gray scale relationship is that the original gray scale of the red sub-pixel is larger than that of the green sub-pixel, and the original gray scale of the green sub-pixel is larger than or equal to that of the blue sub-pixel; and determining that the red sub-pixel is displayed according to the original gray scale, and displaying the green sub-pixel and the blue sub-pixel according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel respectively.
5. The method according to claim 1, wherein the step of displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the predetermined region with the original gray scale, the first display gray scale or the second display gray scale based on the gray scale relationship comprises:
if the gray scale relationship is that the original gray scale of the green sub-pixel is larger than or equal to the original gray scale of the red sub-pixel, and the original gray scale of the green sub-pixel is larger than the original gray scale of the blue sub-pixel; and determining that the green sub-pixel is displayed according to the original gray scale, and displaying the red sub-pixel and the blue sub-pixel according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel respectively.
6. The method according to claim 1, wherein the step of displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the predetermined region with the original gray scale, the first display gray scale or the second display gray scale based on the gray scale relationship comprises:
if the gray scale relationship is that the original gray scale of the blue sub-pixel is larger than or equal to the original gray scale of the green sub-pixel, the original gray scale of the green sub-pixel is larger than the original gray scale of the red sub-pixel; and determining that the blue sub-pixel is displayed according to the original gray scale, and displaying the red sub-pixel and the green sub-pixel according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel respectively.
7. The method as claimed in claim 1, wherein the step of displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the predetermined region at the original gray level, the first display gray level or the second display gray level respectively based on the gray level relationship comprises:
if the gray scale relationship is that the original gray scale of the green sub-pixel is smaller than or equal to the original gray scale of the red sub-pixel, and the original gray scale of the green sub-pixel is smaller than the original gray scale of the blue sub-pixel; and determining that the red sub-pixel and/or the blue sub-pixel are displayed according to the original gray scale, and the green sub-pixel is displayed according to the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel.
8. The method according to claim 1, wherein the step of displaying the red sub-pixel, the green sub-pixel and the blue sub-pixel in the predetermined region with the original gray scale, the first display gray scale or the second display gray scale based on the gray scale relationship comprises:
if the gray scale relationship is that the original gray scales corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel are equal; and determining that the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively displayed by the first display gray scale or the second display gray scale corresponding to the original gray scale of the sub-pixel.
9. The method as claimed in any one of claims 3 to 8, wherein the original gray scale of the red sub-pixel, the green sub-pixel or the blue sub-pixel displayed with the original gray scale is less than a predetermined gray scale.
10. The display method according to any one of claims 1 to 8, wherein the first display gray scale is larger than the original gray scale and the second display gray scale is smaller than the original gray scale for the same original gray scale.
11. The display method according to any one of claims 1 to 8, wherein the second display gray scale comprises N sub gray scales, the N sub gray scales are not equal to each other, and N is an integer greater than or equal to 2.
12. The display method according to claim 11, wherein the second display gray scale comprises a first display sub gray scale, a second display sub gray scale and a third display sub gray scale;
for the same original gray scale, the first display gray scale is greater than or equal to the first display sub gray scale, the first display sub gray scale is greater than or equal to the second display sub gray scale, and the second display sub gray scale is greater than or equal to the third display sub gray scale.
13. The display method according to claim 1, further comprising:
setting the ratio of the number of the sub-pixels displayed by the first display gray scale to the number of the sub-pixels displayed by the second display gray scale in the display panel to be 1 to 1.
14. The method as claimed in claim 1, wherein the predetermined region further comprises a specific color sub-pixel, and the specific color sub-pixel displays the first display gray scale or the second display gray scale corresponding to an original gray scale of the specific color sub-pixel.
15. A display device comprising a display panel which performs display by the display method according to any one of claims 1 to 14, and a timing controller; the time schedule controller is used for obtaining the display data and determining the gray scale relation according to the display data.
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| CN116631350B (en) * | 2023-05-26 | 2024-04-12 | 惠科股份有限公司 | Display color shift optimization method, display driving method and display |
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