CN109559692B - Driving method and driving system of display module and display device - Google Patents
Driving method and driving system of display module and display device Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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Abstract
The invention discloses a driving method, a driving system and a display device of a display module, which comprises a display panel driving process of synchronous driving and a backlight module driving process: the display module comprises a plurality of independently controlled first color light sources and second color light sources; the driving method of the display module comprises the following steps: receiving a first color signal, and converting the first color signal into a first color space signal; adjusting the color saturation of the first color space signal, and converting to obtain a second color signal: driving the display panel using the second color signal; the driving process of the backlight module comprises the following steps: obtaining a first color space signal and a second color space signal to obtain a light source adjustment coefficient; adjusting a first brightness value corresponding to the first color light source and/or the second color light source by using the light source adjustment coefficient to obtain a second brightness value; the first color light source and/or the second color light source are driven using the second luminance value. The invention can improve the problems of color cast and color saturation.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a driving method, a driving system and a display device of a display module.
Background
With the development and progress of science and technology, the lcd has thin body, low power consumption, low radiation, and other hot spots, and thus is the mainstream product of the lcd and widely used. Most of the existing liquid crystal displays in the market are Backlight liquid crystal displays (lcds), which include a liquid crystal panel and a Backlight Module (Backlight Module). The liquid crystal panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, and a driving voltage is applied to the two glass substrates to control the rotation direction of the liquid crystal molecules so as to refract light rays of the backlight module out to generate a picture.
In one approach, which was used by the inventors and is not disclosed, the color shift problem is improved by adjusting the color saturation of the signal, but doing so, there is a loss in the color saturation rendering effect of the signal.
Disclosure of Invention
The invention aims to solve the technical problem of providing a driving method, a driving system and a display device of a display module, which can improve the color cast problem and ensure the color saturation.
In order to achieve the above object, the present invention provides a driving method of a display module, which includes a display panel driving process of synchronous driving and a backlight module driving process:
the display module comprises a plurality of independently controlled first color light sources and second color light sources;
the driving method of the display module comprises the following steps:
receiving a first color signal under an RGB system corresponding to a display panel, and converting the first color signal into a first color space signal under an HSV system;
carrying out color saturation adjustment on the first color space signal by using a preset adjustment coefficient to obtain a second color space signal under an HSV system; and converting the second color space signal to obtain a second color signal under an RGB system:
driving the display panel using the second color signal;
the backlight module driving process comprises the following steps:
receiving a first color signal under an RGB system corresponding to the display panel, obtaining a first color space signal and a second color space signal under an HSV system, and obtaining a light source adjustment coefficient according to the first color space signal and the second color space signal;
adjusting a first brightness value corresponding to the first color light source and/or the second color light source by using the light source adjustment coefficient to obtain a second brightness value;
the first color light source and/or the second color light source are driven using the second luminance value.
The invention also provides a driving system of the display panel, and a driving method using any one of the display modules comprises the following steps:
a display panel driving circuit and a backlight module driving circuit which are driven synchronously;
the display module comprises a plurality of independently controlled first color light sources and second color light sources;
the display panel driving circuit includes:
the receiving module is used for receiving a first color signal under an RGB system corresponding to the display panel and converting the first color signal into a first color space signal under an HSV system;
the color saturation adjusting module is used for adjusting the color saturation of the first color space signal by using a preset adjusting coefficient to obtain a second color space signal under an HSV system; and converting the second color space signal to obtain a second color signal under an RGB system:
the display panel driving module is used for driving the display panel by using the second color signal;
the backlight module driving circuit includes:
the light source adjustment coefficient calculation module is used for receiving a first color signal under an RGB system corresponding to the display panel, obtaining a first color space signal and a second color space signal under an HSV system, and obtaining a light source adjustment coefficient according to the first color space signal and the second color space signal;
the light source adjusting module is used for adjusting a first brightness value corresponding to the first color light source and/or the second color light source by using a light source adjusting coefficient to obtain a second brightness value;
and the backlight module driving module is used for driving the first color light source and/or the second color light source by using the second brightness value.
The invention also discloses a display device comprising the driving system of the display panel.
In the invention, in a technique which is known by the inventor and is not disclosed, because the RGB system is easy to have a problem of serious color cast under a high color saturation value, a first color signal under the RGB system is converted into a first color space signal under the HSV system, then the first color space signal is adjusted, and finally a second color signal with the problem of color cast improved is obtained; meanwhile, on the basis, the second brightness value is that the intensity of the light source is adjusted while the color saturation is adjusted, so that a color saturation signal with damaged color saturation can be returned to saturated hue from an unsaturated color point, the color cast is reduced, particularly the color cast with a large visual angle, and the good presentation of the color saturation is maintained, so that the good color pure expression is achieved.
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The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of color shift variation of large viewing angle and front viewing angle of various representative color systems of a liquid crystal display;
FIG. 2 is a first schematic diagram of a division of primary pixels into primary and secondary pixels in an exemplary scheme;
FIG. 3 is a second schematic diagram of the division of primary pixels into primary and secondary pixels in an exemplary scheme;
FIG. 4 is a flowchart illustrating a driving process of a display panel according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a driving process of the backlight module according to an embodiment of the present invention;
FIG. 6 is a schematic view of a direct type display module according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating the correlation function of the second preset adjustment factor H2 according to the embodiment of the present invention;
FIG. 8 is a schematic diagram of the variation of the current color saturation signal and the second color saturation signal of an embodiment of the present invention;
FIG. 9 is a graph of color difference change for a current color saturation signal and a second color saturation signal for an embodiment of the present invention;
FIG. 10 is a schematic illustration of the change in color difference between a current color saturation signal and a second color saturation signal in accordance with an embodiment of the present invention;
FIG. 11 is a schematic diagram of a driving system of a display panel according to an embodiment of the invention;
FIG. 12 is a diagram of a driving circuit of a display panel according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of a driving circuit of a backlight module according to an embodiment of the invention;
fig. 14 is a schematic diagram of a display device according to an embodiment of the invention.
100, a driving system of the display panel; 200. a display device; 110. a display panel drive circuit; 111. a receiving module; 112. a color saturation adjustment module; 113. a display panel driving module; 120. a backlight module driving circuit; 121. a light source adjustment calculation module; 122. a light source adjusting module; 123. a backlight module driving module; 130. a first color light source; 140. a second color light source.
Detailed Description
Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
FIG. 1 is a schematic diagram of the present invention adopting the design of primary and secondary pixels to improve the color shift problem.
Large-sized lcd panels, especially VA (vertical alignment) lcd panels, have a corresponding large viewing angle brightness that is rapidly saturated with voltage, resulting in a severe deterioration in viewing angle image quality contrast and color shift compared to front view image quality.
Fig. 1 is a schematic diagram of color shift variation of various representative color systems of an lcd in a large viewing angle and a front viewing angle, and referring to fig. 1, it can be clearly seen that the color shift of R, G, B hue in the large viewing angle is worse than that in other color systems.
An exemplary solution is to subdivide each sub-pixel of RGB (Red, Green, Blue) into main/sub-pixels (main/sub), so that the overall large-view luminance is closer to the front view with voltage variation.
Fig. 2 is a schematic diagram of a first comparison without distinguishing primary and secondary pixels, and fig. 3 is a schematic diagram of a second comparison without distinguishing primary and secondary pixels, as can be seen with reference to fig. 2 and 3, wherein the x-coordinate, the y-coordinate, and the z-coordinate respectively represent three directions of a three-dimensional space; the thetaa represents the pretilt angle at which the main pixel has a large voltage, and the thetab represents the pretilt angle at which the sub pixel has a small voltage. In fig. 3, the abscissa is a gray scale signal, and the ordinate is a luminance signal, and at a large viewing angle, the luminance is rapidly saturated with the signal, which causes a color shift problem (fig. 3, a left arc segment) at the large viewing angle, and the problem can be improved to a certain extent by distinguishing the primary and secondary pixels.
Specifically, the primary signal is divided into primary and secondary pixels with large voltage and small voltage, the large voltage plus the small voltage maintains the change of the primary signal with the brightness, the side-looking brightness seen by the large voltage changes with the gray scale as PART a in fig. 3, and the side-looking brightness seen by the small voltage changes with the gray scale as PART B in fig. 3. Therefore, the brightness of the side view synthesis looks like a green line when changing with the gray scale, and is closer to the relation of the red line front view brightness changing with the gray scale, so that the relation of the view angle brightness changing with the signal is close to the relation of the front view original signal brightness changing with the signal, and the view angle is improved.
The defect of color shift of a viewing angle is solved by applying different driving voltages to the primary and secondary pixels in space, so that the pixel design usually needs to design a metal wire or a Thin Film Transistor (TFT) element to drive the secondary pixel, the light-permeable opening area is sacrificed, the panel transmittance is influenced, and the backlight cost is directly increased.
Therefore, the invention is based on different technical concepts, and the following schemes are improved and obtained:
the invention is further illustrated by the following figures and examples.
FIG. 4 is a flowchart illustrating a driving process of a display panel according to an embodiment of the present invention; FIG. 5 is a flowchart illustrating a driving process of the backlight module according to an embodiment of the present invention; as shown in fig. 4 and 5, an embodiment of the present invention discloses a driving method of a display module, which is characterized by including a display panel driving process of synchronous driving and a backlight module driving process:
the display module comprises a plurality of independently controlled first color light sources and second color light sources;
the driving method of the display module comprises the following steps:
s11, receiving a first color signal under an RGB system corresponding to the display panel, and converting the first color signal into a first color space signal under an HSV system;
s12, adjusting the color Saturation of the first color space signal by using a preset adjustment coefficient to obtain a second color space signal under an HSV (Hue, Saturation) system; and converting the second color space signal to obtain a second color signal under an RGB system:
s13, driving the display panel by using the second color signal;
the backlight module driving process comprises the following steps:
s21, receiving a first color signal under an RGB system corresponding to the display panel, obtaining a first color space signal and a second color space signal under an HSV system, and obtaining a light source adjustment coefficient according to the first color space signal and the second color space signal;
s22, adjusting the first brightness value corresponding to the first color light source and/or the second color light source by using the light source adjustment coefficient to obtain a second brightness value;
and S23, driving the first color light source and/or the second color light source using the second luminance value.
The driving system for using the driving method can be arranged at the front end and in a time sequence control chip of the display panel, and parameters such as a preset adjustment coefficient lookup table related to the performance of the display panel corresponding to the driving system are stored in the time sequence control chip.
In the invention, in a technique which is known by the inventor and is not disclosed, because the RGB system is easy to have a problem of serious color cast under a high color saturation value, a first color signal under the RGB system is converted into a first color space signal under the HSV system, then the first color space signal is adjusted, and finally a second color signal with the problem of color cast improved is obtained; meanwhile, on the basis, the second brightness value is that the intensity of the light source is adjusted while the color saturation is adjusted, so that a color saturation signal with damaged color saturation can be returned to saturated hue from an unsaturated color point, the color cast is reduced, particularly the color cast with a large visual angle, and the good presentation of the color saturation is maintained, so that the good color pure expression is achieved.
For example, in the driving process of the backlight module, the first color space signal and the second color space signal obtained can be independently calculated and obtained from the driving process of the display panel; of course, the light source adjustment coefficient may be obtained from the display panel driving process, and then transmitted to the backlight module (corresponding signal processing module) for recalculation, so long as the control is performed to synchronously drive the display panel and the backlight module.
Fig. 6 is a schematic view of a direct-type backlight display module, referring to fig. 6, and referring to fig. 4 and 5, in an embodiment, the display module is a direct-type backlight display module, the direct-type backlight display module includes a plurality of backlight partitions, and each backlight partition includes a plurality of independently controlled light sources of the first color and a second color respectively;
the backlight partition further includes a plurality of independently controlled third color light sources.
The backlight module includes a plurality of backlight partitions, each of which may include three independently controlled light sources as shown in fig. 6, or may be applicable to other architectures.
Of course, other types of display modules are possible as long as they are suitable.
In the scheme, the display panel is a direct-type backlight panel, the display panel can better realize the technology of compensating color saturation loss through light source intensity adjustment, and specifically, each backlight partition comprises a plurality of independently controlled first color light sources, second color light sources and third color light sources; in this way, since the color saturation value S is 1-min/max, where min and max are related to the stimulus value signal in the RGB system, it is determined by calculation which light source intensity of which light source or light sources is/are increased, which can help to supplement the color saturation, and can be adjusted accordingly, thereby maintaining good pure color expression while improving the color shift problem.
In one embodiment, the step of obtaining the light source adjustment coefficient according to the first color space signal and the second color space signal comprises:
acquiring first color space signals and second color space signals of all pixels in a current backlight partition corresponding to a current frame, and respectively calculating first average color saturation signals corresponding to the first color space signals and second average color saturation signals corresponding to the second color space signals;
and calculating to obtain a light source adjustment coefficient according to the first average color saturation signal and the second average color saturation signal.
In the scheme, the adjustment of the light source intensity is performed by taking one backlight partition as a unit to obtain all the first color space signal and the second color space signal, so that a first average color saturation signal Sn _ ave corresponding to the first color signal and a second average color saturation signal S' n _ ave corresponding to the second color signal can be obtained through calculation based on the first color space signal and the second color space signal respectively to measure the difference between color saturation signals before and after the color saturation adjustment operation, and then a light source adjustment coefficient is calculated based on the difference between the two signals, so that the backlight partition of the display panel can maintain good pure color performance by taking the backlight partition as a whole and independently compensating the color saturation of each backlight partition respectively.
In one embodiment, the calculation of the light source adjustment coefficient includes the following steps:
calculating a first Average color saturation signal corresponding to the first color space signal by using a formula Sn _ ave ═ Average (Sn _1, Sn _1,2, …, Sn _ i, j);
calculating a second Average color saturation signal corresponding to the second color space signal by using a formula S 'n _ ave ═ Average (S' n _1, S 'n _1,2, …, S' n _ i, j);
and calculating to obtain a light source adjustment coefficient according to the first average color saturation signal Sn _ ave and the second average color saturation signal S' n _ ave.
In the scheme, all the first color space signals and all the second color space signals are acquired by taking one backlight partition as a unit, the color saturation signals are captured, all the color saturation signals are averaged to calculate the light source adjustment coefficient, so that the backlight partition of the display panel can improve the color cast problem, and simultaneously, the backlight partitions are taken as a whole, and each backlight partition independently compensates the color saturation to maintain good color pure color performance.
Wherein the step of converting the first color signal into a first color space signal under the HSV system comprises:
acquiring first color signals Rn _ i, j, Gn _ i, j and Bn _ i, j, and converting each group of RGB three-primary-color sub-pixel gray scale signals into three-primary-color normalized brightness signals r, g and b; completing conversion to obtain first normalized brightness signals rn _ i, j, gn _ i, j and bn _ i, j;
converting the first color signal into a first color space signal Sni, j being 1-minni, j/maxni, j, according to the first normalized luminance signal;
carrying out color saturation value reduction processing on the current color saturation signal by using a preset adjustment coefficient; the step of completing the adjustment processing of the color saturation signal to obtain a second color space signal under an HSV system comprises the following steps:
under the condition that maxni, j is kept unchanged, adjusting minni, j by using a preset adjusting coefficient H;
completing adjustment processing of the color saturation signal to obtain a second color space signal S' n _ i, j is 1-minni, j is H/maxni, j under an HSV system; where minni, j is min (rn _ i, j, gn _ i, j, bn _ i, j), and maxni, j is max (rn _ i, j, gn _ i, j, bn _ i, j). Wherein: sn _ i, j ═ 1-minj, j/maxn _ i, j;
wherein minj, j ═ min (r, g, b); maxn _ i, j ═ max (r, g, b);
wherein R ═ R (R/255) ^ γ R, G ═ G (G/255) ^ γ G, B ^ B (B/255) ^ γ B;
wherein γ r, γ g, γ b are gamma signals of the first color signal;
wherein, R, G, B refer to RGB three primary colors gray scale digital signal corresponding to the first color signal. In the scheme, the average value of all color saturation signals in the backlight subarea is respectively calculated corresponding to a first color space signal of a first color signal and a second color space signal of a second color signal, so that a first average color saturation signal and a second average color saturation signal are obtained, the color saturation presenting difference before and after (for improving color cast) color saturation adjustment of the backlight subarea is reflected, and the light source adjustment coefficient is calculated according to the color saturation presenting difference.
In one embodiment, the step of calculating the illuminant adjustment factor based on the first average color saturation signal and the second average color saturation signal comprises:
calculating a first average color saturation signal Sn _ ave-1-minn _ ave/maxn _ ave;
calculating a second average color saturation signal S 'n _ ave ═ 1-min' n _ ave/maxn _ ave;
obtaining a third average color saturation signal S' n _ ave for the second average color saturation signal by using the light source adjustment coefficient;
wherein the light source adjustment coefficient y satisfies the following formula: s "n _ ave ═ Sn _ ave, i.e.:
1-minjnave/maxn _ ave ═ 1-min 'n _ ave/(maxn _ ave ×) and, thus, y ═ S' n _ ave-1)/(Sn _ ave-1);
wherein maxn _ ave is the largest average signal among the red subpixel average signal, the green subpixel average signal, and the blue subpixel average signal of the first color signals of all pixels in the backlight partition corresponding to the current frame; minn _ ave is the minimum average signal of the red sub-pixel average signal, the green sub-pixel average signal and the blue sub-pixel average signal of the first color signals of all the pixels in the backlight partition corresponding to the current frame;
the maxn _ ave is simultaneously the maximum average signal of the red sub-pixel average signal, the green sub-pixel average signal and the blue sub-pixel average signal of the second color signals of all the pixels in the backlight partition corresponding to the current frame; min' n _ ave is the minimum average signal among the red, green, and blue subpixel average signals of the second color signals of all pixels within the backlight partition corresponding to the current frame.
In this scheme, the maximum average signal of the second color signal is consistent with the maximum average signal of the first color signal, because when the color saturation is adjusted, maxni, j of each pixel is kept unchanged, and minni, j is adjusted, so that maxn _ ave finally obtained is unchanged; the above-mentioned Sn _ ave is 1-minn _ ave/maxn _ ave, and S 'n _ ave is 1-min' n _ ave/maxn _ ave, not requiring to actually calculate minn _ ave, maxn _ ave and min 'n _ ave, but can be derived from the color saturation signal, and these derived values are used for auxiliary calculation to finally obtain the light source adjustment coefficient y ═ S' n _ ave-1)/(Sn _ ave-1), and the light source adjustment coefficient can be calculated according to the formula Sn _ ave ═ Average (Sn _1, Sn _1,2, …, Sn _ i, j) and the formula S 'n _ ave ═ Average (S' n _1, S 'n _1,2, …, S' n _ i, j); and the light source adjustment coefficient is calculated based on the integral color saturation difference of the backlight subarea, so that the color saturation of the backlight subarea can be well compensated.
In an embodiment, the step of obtaining the preset adjustment coefficient corresponding to the current color saturation signal includes: and acquiring a color saturation signal of the first color space signal, and calculating according to a preset calculation formula based on the color saturation signal or searching through a preset adjustment coefficient lookup table based on the color saturation signal.
In the scheme, under an RGB color system, the higher the color saturation of a signal is, the more serious the color cast is; thus, under the condition of certain color saturation values, the color cast is serious, and under the condition of certain color saturation values, the problem of color cast is not obvious and belongs to an acceptable range; according to the method, a current color saturation signal is obtained, a preset adjusting coefficient corresponding to the current color saturation signal is obtained, and color saturation adjustment is carried out on the color saturation signal, so that the color saturation value is controlled in an area with less serious color cast problem, and the color cast problem is improved; in addition, the scheme is not based on sacrificing the light-permeable opening area, so that the reduction of the light transmittance can be avoided, and the improvement of the production cost of the display panel is avoided.
In an embodiment, the step of performing color saturation adjustment on the first color space signal by using a preset adjustment coefficient to obtain a second color space signal under the HSV system includes:
acquiring a current color saturation signal of a first color space signal, detecting whether the current color saturation signal meets a preset color saturation threshold value and is positioned in a hue adjusting interval, and if so, acquiring a corresponding preset adjusting coefficient according to the corresponding color saturation value and the hue interval based on the color saturation signal;
and adjusting the current color saturation signal by using a preset adjustment coefficient to obtain a second color space signal under the HSV system.
Wherein, the color saturation threshold value can be 0.5, and if the color saturation threshold value is larger than 0.5, the color saturation threshold value is judged to be satisfied; or may be an interval, such as 0.5-1 (excluding 0.5 and 1), i.e., when the current color saturation is greater than 0.5 and less than 1, color saturation adjustment is performed, and the current color saturation is equal to 0.5 or 1, color saturation adjustment may not be performed.
In the scheme, only part of the color saturation signals are subjected to adjustment operation, and the part of the color saturation signals not only need to meet a color saturation threshold value, but also need to meet a hue interval; this is because the correspondence between the color saturation values and the color shifts is different between different hue intervals; the higher the color saturation value, the more serious the color shift problem; in addition, the closer to the dominant hue, the more serious the color shift problem, for example, in a hue range corresponding to a blue dominant hue of 240 degrees, the color shift degree of the same color saturation value far exceeds the non-adjusted hue range of 300 degrees; at this time, even if the color saturation signal of the 300-degree hue satisfies the color saturation threshold, the corresponding color shift degree may be small and does not need to be improved; similarly, the color saturation value is high, but if the hue interval is appropriate, the color shift problem of the corresponding color saturation signal may not be particularly serious and does not need to be adjusted; therefore, only the color saturation signals meeting the color cast problem of the preset threshold value and the hue interval are adjusted, for example, the color saturation value is reduced, the color cast problem can be improved, meanwhile, unnecessary processing such as color saturation value reduction can be avoided for the signals which do not need color cast adjustment, and the display effect of the display panel can be improved.
The color saturation signal can be divided into at least a first hue interval, a second hue interval and a third hue interval according to different hues; in the step of obtaining the preset adjustment coefficient corresponding to the current color saturation signal: and corresponding to the same tone, the larger the color saturation value of the current color saturation signal is, the larger the adjustment amplitude of the adjustment processing is.
In the scheme, as the color saturation value of the color saturation signal is higher in the same hue interval, especially under the same hue, the corresponding color cast problem is more serious; therefore, the scheme has larger adjustment amplitude for signals with high color saturation, and has smaller adjustment amplitude for signals with low color saturation; the color saturation value of each signal is generally subjected to down-regulation processing, so that the color saturation difference of each signal can be reduced, the color cast problem caused by too high color saturation is avoided, meanwhile, the color cast problem caused by too large color saturation difference is avoided, and the effect of better color cast improvement is achieved. Of course, it is also possible to perform the adjustment processing on the color saturation signals with lower color saturation values, so as to make the different color saturation signals more uniform, and also to improve the problem of color shift to some extent.
In addition, the adjustment amplitude mainly refers to the amplitude of the color saturation signal, according to the difference of the calculation formulas, the larger the color saturation value is, the smaller the corresponding preset adjustment coefficient may be, and the larger the corresponding preset adjustment coefficient may be, but the effect of the larger the adjustment amplitude is unchanged; for example, if the preset adjustment coefficient is a coefficient of the entire color saturation signal, for example, S '═ S × H (where S is the current color saturation signal, S' is the second color saturation signal, and H is the preset adjustment coefficient), the larger the adjustment amplitude is, the smaller the value of the preset adjustment coefficient is; if the preset adjustment coefficient is a coefficient of a certain parameter of the color saturation signal, the larger the adjustment amplitude is, the larger the corresponding coefficient may also be, for example, when S 'is 1-min × H/max (where S is the current color saturation signal, S' is the second color saturation signal, and H is the preset adjustment coefficient), the larger the preset adjustment coefficient is, the larger the corresponding adjustment amplitude is.
Specifically, the first hue interval, the second hue interval and the third hue interval are respectively a red hue interval, a green hue interval and a blue hue interval;
the adjustment amplitude of the preset adjustment coefficient corresponding to the blue hue interval on the current color saturation signal is larger than the adjustment amplitude of the preset adjustment coefficient corresponding to the red hue interval on the current color saturation signal; the adjustment amplitude of the preset adjustment coefficient corresponding to the red hue interval to the current color saturation signal is larger than the adjustment amplitude of the preset adjustment coefficient corresponding to the green hue interval to the current color saturation signal. In the scheme, the degree of color cast problem is different based on color saturation signals of different hue intervals, under the condition of the same color saturation value, the color cast of a part of the hue intervals is serious, and the color cast of a part of the hue intervals is lighter; under an RGB system, the color cast problem of a color saturation signal in a blue hue interval is the most serious, and the color cast problem of the color saturation signal in a green hue interval is the least serious; in the scheme, for example, S' ═ S × H, the preset adjustment coefficient corresponding to the blue tone interval may be smaller than the preset adjustment coefficient corresponding to the red tone interval, and the preset adjustment coefficient corresponding to the red tone interval may be smaller than the preset adjustment coefficient corresponding to the green tone interval, where the smaller the preset adjustment coefficient is, the larger the adjustment amplitude is; correspondingly, taking S' ═ 1-min × H/max as an example, at this time, the preset adjustment coefficient corresponding to the blue hue interval is the largest and the adjustment amplitude is the largest, and the preset adjustment coefficient corresponding to the green hue interval is the smallest and the adjustment amplitude is the smallest; under the same color saturation value, the color saturation signal in the blue color tone interval has the largest reduction amplitude, and the color saturation signal in the green color tone interval has the smallest reduction amplitude, so that the color cast problem caused by the overlarge color saturation value can be reduced, the color saturation of the color saturation signal is more uniform, the color cast problem can be improved to a certain extent, and the good color cast improvement effect can be achieved.
In an embodiment, the preset adjustment coefficient is used for carrying out color saturation value reduction processing on the current color saturation signal S; and the step of completing the adjustment processing of the color saturation signal to obtain and convert the second color saturation signal S' to obtain a second color space signal under an HSV system:
calculating to obtain a third color saturation signal S 'according to the current color saturation signal S and the second color saturation signal S';
completing the adjustment of the color saturation value twice, and obtaining a second color space signal under an HSV system based on a third color saturation signal S';
and converting the second color space signal into a second color signal under an RGB system according to the second color space signal to drive the display panel.
Fig. 7 is a schematic diagram of a correlation function of the second preset adjustment coefficient H2 according to an embodiment of the present invention, and referring to fig. 7, and referring to fig. 4 to 6, specifically, the third color saturation signal S "conforms to the following formula: s ═ S- (S-S') -H2;
the second preset adjustment coefficient H2 satisfies the following formula:
H2＝2*ABS(sin((Hue/360*3-1/2)*π)-1。
in the scheme, under an RGB system, a 0-degree red pure color tone, a 120-degree green pure color tone and a 240-degree blue pure color tone are defined, and the closer to the pure color tone, the more serious the color cast problem is (under the same color saturation value); based on the second preset adjustment coefficient H2, the closer the color saturation signal of the pure color tone is, the larger amplitude of the secondary adjustment is obtained, and the farther the color saturation signal of the pure color tone is, the smaller amplitude of the secondary adjustment is obtained; therefore, the saturation signal close to the pure color tone can achieve the effect of better improving the color cast problem, and the saturation signal far away from the pure color tone can achieve the effect of reducing the damage of improving the color cast to the whole color saturation, so as to achieve the balance of the color cast and the color saturation and be beneficial to improving the display effect of the display panel.
In the stage of color saturation adjustment:
fig. 8 is a schematic diagram of changes in a current color saturation signal and a second color saturation signal according to an embodiment of the present invention, fig. 9 is a graph illustrating changes in color difference between the current color saturation signal and the second color saturation signal according to an embodiment of the present invention, and fig. 10 is a schematic diagram illustrating changes in color difference between the current color saturation signal and the second color saturation signal according to an embodiment of the present invention.
The color difference change map of fig. 9 may be in the case of a front view angle. The dashed line in fig. 10 is the corresponding color difference change of the current color saturation signal in various color systems, and the solid line is the corresponding color difference change of the second color saturation signal in various color systems.
Specifically, if the display is driven with 8-bit color resolution, the gray scale of the RGB input signals can be decomposed into 0,1,2 … 255 gray scale driving signals. The invention converts RGB three primary colors input signals into HSV color space signals, and adjusts the color saturation according to different hue and saturation values in the HSV color space to achieve the effect of improving the color cast.
Referring to fig. 1, it can be clearly found that the color shift of R, G, B hue in the large viewing angle of the color system is more serious than that of other color systems due to the variation of the large viewing angle and the front viewing angle of various representative color systems of the lcd, so that the problem of R, G, B hue color shift can be solved to greatly improve the overall color shift improvement of the large viewing angle. The calculation method for converting the color signals or RGB three-primary-color signals into HSV signals in the RGB system is described as follows:
the input signal of RGB three primary colors is 8bit gray scale digital signal of 0,1, … 255, and the brightness normalization signal (taking 255 gray scale as maximum brightness) corresponding to 255 input signal of each gray scale signal is r, g, b respectively.
Where R ═ R/255 ^ γ R, G ^ γ G, B ^ B (B/255) ^ γ B, where γ R, γ G, γ B are so-called gamma signals, the digital gray-scale signals are converted into exponential parameters of the luminance signals. H is the hue signal, and r, g, b normalized luminance signals are converted into hue H and saturation s signals. Wherein, H is represented by color, and represents the color presentation of different hues from 0 degree to 360 degrees, wherein 0 degree is defined as red, 120 degrees is defined as green, and 240 degrees is defined as blue.
r, g, b normalize the conversion relationship between the luminance signal and the hue h and saturation signal s, and satisfy the following formula:
in summary, it can be seen that when the hue approaches R, G, B pure hue, the color shift observed at viewing angles is more conspicuous, while when the hue approaches R, G, B pure hue, the color shift phenomenon is more conspicuous as the color saturation s is larger. The color saturation s can be reduced R, G, B when the pure hue is changed, namely, the closer to the pure hue, the larger the adjustment range of the color saturation is, so that the color enjoyed at a large visual angle is better than the color observed in a front view or the color cast problem is eliminated.
In addition, after the color saturation adjustment is completed, a detection step may be added, for example, to convert the color saturation signal into a CIE Lu ' v ' color space signal (CIE, Commission international de L ' Eclairage), where L is a luminance coordinate and u ' and v ' are chrominance coordinates. In order to improve the color shift problem, the color saturation adjustment performs a process of reducing the color saturation value on the current color saturation signal, but if the color saturation loss is reduced as much as possible, the change of the pure color, i.e. the change from the current color saturation signal S to the second color saturation signal S', i.e. the purity change or the color difference Δ uv, should satisfy:
Δ uv √ (u _1-u _2) ^2+ (v _1-v _2) ^2) ≦ 0.02. Where u _1 and v _1 are the chromaticity coordinates of the current color saturation signal and u _2 and v _2 are the chromaticity coordinates of the second color saturation signal, i.e. the color saturation signal after color saturation adjustment.
FIG. 11 is a diagram of a driving system of a display panel according to the present invention, and FIG. 12 is a diagram of a driving circuit of a display panel according to an embodiment of the present invention; FIG. 13 is a schematic diagram of a driving circuit of a backlight module according to an embodiment of the invention; referring to fig. 11-13, in conjunction with fig. 1-10, it can be seen that: the present invention also provides a driving system 100 of a display panel, comprising:
a display panel driving circuit 110 and a backlight module driving circuit 120 which are synchronously driven;
the display module comprises a plurality of independently controlled first color light sources 130 and second color light sources 140;
the display panel driving circuit 110 includes:
the receiving module 111, i.e., a receiving circuit, is configured to receive a first color signal in an RGB system corresponding to the display panel, and convert the first color signal into a first color space signal in an HSV system;
a color saturation adjusting module 112, i.e., a color saturation adjusting circuit, configured to perform color saturation adjustment on the first color space signal by using a preset adjusting coefficient, so as to obtain a second color space signal in an HSV system; and converting the second color space signal to obtain a second color signal under an RGB system:
a display panel driving module 113, i.e., a first driving circuit, for driving the display panel using the second color signal;
the backlight module driving circuit 120 includes:
the light source adjustment coefficient calculation module 121, that is, a light source adjustment coefficient calculation circuit, is configured to receive a first color signal in an RGB system corresponding to the display panel, obtain a first color space signal and a second color space signal in an HSV system, and obtain a light source adjustment coefficient according to the first color space signal and the second color space signal;
the light source adjusting module 122, i.e. a light source adjusting circuit, is configured to adjust a first luminance value corresponding to the first color light source and/or the second color light source by using the light source adjusting coefficient to obtain a second luminance value; the backlight module driving module 123, i.e., the second driving circuit, is configured to drive the first color light source and/or the second color light source by using the second luminance value.
Fig. 14 is a schematic view of a display device according to the present invention, and referring to fig. 14, it can be known from fig. 1 to fig. 13 that: the invention also discloses a display device 200 comprising a driving system 100 of a display panel according to the invention.
It should be noted that, the limitations of the steps involved in the present disclosure are not considered to limit the order of the steps without affecting the implementation of the specific embodiments, and the steps written in the foregoing may be executed first, or executed later, or even executed simultaneously, and as long as the present disclosure can be implemented, all should be considered to belong to the protection scope of the present disclosure.
The technical solution of the present invention can be widely applied to various display panels, such as TN type display panels (called twisted nematic panels), IPS type display panels (In-Plane Switching), VA type display panels (Vertical Alignment technology), MVA type display panels (Multi-domain Vertical Alignment technology), and of course, other types of display panels, such as organic light-emitting display panels (OLED display panels for short), which can be applied to the above solutions.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. A driving method of a display module is characterized by comprising a display panel driving process and a backlight module driving process which are synchronously driven:
the display module comprises a plurality of independently controlled first color light sources and second color light sources;
the driving method of the display module comprises the following steps:
receiving a first color signal under an RGB system corresponding to a display panel, and converting the first color signal into a first color space signal under an HSV system;
carrying out color saturation adjustment on the first color space signal by using a preset adjustment coefficient to obtain a second color space signal under an HSV system; and converting the second color space signal to obtain a second color signal under an RGB system:
driving the display panel using the second color signal;
the backlight module driving process comprises the following steps:
receiving a first color signal under an RGB system corresponding to the display panel, obtaining a first color space signal and a second color space signal under an HSV system, and obtaining a light source adjustment coefficient according to the first color space signal and the second color space signal;
adjusting a first brightness value corresponding to the first color light source and/or the second color light source by using the light source adjustment coefficient to obtain a second brightness value;
driving the first color light source and/or the second color light source using the second luminance value;
the display module is a direct type backlight display module, the direct type backlight display module comprises a plurality of backlight partitions, and each backlight partition comprises a plurality of independently controlled first color light sources and second color light sources; the backlight partition further comprises a plurality of independently controlled third color light sources;
the step of obtaining the light source adjustment coefficient according to the first color space signal and the second color space signal comprises:
acquiring first color space signals and second color space signals of all pixels in a current backlight partition corresponding to a current frame, and respectively calculating first average color saturation signals corresponding to the first color space signals and second average color saturation signals corresponding to the second color space signals;
and calculating to obtain a light source adjustment coefficient according to the first average color saturation signal and the second average color saturation signal.
2. The method as claimed in claim 1, wherein the calculating of the light source adjustment factor comprises the steps of:
calculating a first Average color saturation signal corresponding to the first color space signal by using a formula Sn _ ave ═ Average (Sn _1, Sn _1,2, …, Sn _ i, j);
calculating a second Average color saturation signal corresponding to the second color space signal by using a formula S 'n _ ave ═ Average (S' n _1, S 'n _1,2, …, S' n _ i, j);
and calculating to obtain a light source adjustment coefficient according to the first average color saturation signal Sn _ ave and the second average color saturation signal S' n _ ave.
3. The method as claimed in claim 2, wherein the step of converting the first color signal into a first color space signal under HSV system comprises:
acquiring first color signals Rn _ i, j, Gn _ i, j and Bn _ i, j, and converting each group of RGB three-primary-color sub-pixel gray scale signals into three-primary-color normalized brightness signals r, g and b; completing conversion to obtain first normalized brightness signals rn _ i, j, gn _ i, j and bn _ i, j;
converting the first color signal into a first color space signal Sn _ i, j ═ 1-minni, j/maxni, j according to the first normalized luminance signal;
carrying out color saturation value reduction processing on the current color saturation signal by using a preset adjustment coefficient; the step of completing the adjustment processing of the color saturation signal to obtain a second color space signal under an HSV system comprises the following steps:
under the condition that maxni, j is kept unchanged, adjusting minni, j by using a preset adjusting coefficient H;
completing adjustment processing of the color saturation signal to obtain a second color space signal S' ni, j is 1-minni, j is H/maxni, j under an HSV system;
where minni, j is min (rn _ i, j, gn _ i, j, bn _ i, j), and maxni, j is max (rn _ i, j, gn _ i, j, bn _ i, j).
4. The method of claim 3, wherein the step of calculating the light source adjustment factor according to the first average color saturation signal and the second average color saturation signal comprises:
calculating a first average color saturation signal Sn _ ave-1-minn _ ave/maxn _ ave;
calculating a second average color saturation signal S 'n _ ave ═ 1-min' n _ ave/maxn _ ave;
obtaining a third average color saturation signal S' n _ ave for the second average color saturation signal by using the light source adjustment coefficient;
wherein the light source adjustment coefficient y satisfies the following formula:
s "n _ ave ═ Sn _ ave, i.e.:
1-minjnave/maxn _ ave ═ 1-min 'n _ ave/(maxn _ ave ×) and, thus, y ═ S' n _ ave-1)/(Sn _ ave-1);
wherein maxn _ ave is the largest average signal among the red subpixel average signal, the green subpixel average signal, and the blue subpixel average signal of the first color signals of all pixels in the backlight partition corresponding to the current frame; minn _ ave is the minimum average signal of the red sub-pixel average signal, the green sub-pixel average signal and the blue sub-pixel average signal of the first color signals of all the pixels in the backlight partition corresponding to the current frame;
the maxn _ ave is simultaneously the maximum average signal of the red sub-pixel average signal, the green sub-pixel average signal and the blue sub-pixel average signal of the second color signals of all the pixels in the backlight partition corresponding to the current frame; min' n _ ave is the minimum average signal among the red, green, and blue subpixel average signals of the second color signals of all pixels within the backlight partition corresponding to the current frame.
5. The method as claimed in claim 3, wherein the step of obtaining the preset adjustment coefficient corresponding to the current color saturation signal comprises:
and acquiring a color saturation signal of the first color space signal, and calculating according to a preset calculation formula based on the color saturation signal or searching through a preset adjustment coefficient lookup table based on the color saturation signal.
6. The method as claimed in claim 5, wherein the step of performing the saturation value reduction process on the current saturation signal by using the preset adjustment coefficient comprises:
the method comprises the steps of obtaining a current color saturation signal of a first color space signal, detecting whether the current color saturation signal meets a preset color saturation threshold value and whether the current color saturation signal is located in a hue adjusting interval, and if yes, obtaining a corresponding preset adjusting coefficient according to the corresponding color saturation value and the hue adjusting interval based on the color saturation signal.
7. A driving system of a display panel using the driving method of the display module according to any one of claims 1 to 6, comprising:
a display panel driving circuit and a backlight module driving circuit which are driven synchronously;
the display module comprises a plurality of independently controlled first color light sources and second color light sources;
the display panel driving circuit includes:
the receiving module is used for receiving a first color signal under an RGB system corresponding to the display panel and converting the first color signal into a first color space signal under an HSV system;
the color saturation adjusting module is used for adjusting the color saturation of the first color space signal by using a preset adjusting coefficient to obtain a second color space signal under an HSV system; and converting the second color space signal to obtain a second color signal under an RGB system:
the display panel driving module is used for driving the display panel by using the second color signal;
the backlight module driving circuit includes:
the light source adjustment coefficient calculation module is used for receiving a first color signal under an RGB system corresponding to the display panel, obtaining a first color space signal and a second color space signal under an HSV system, and obtaining a light source adjustment coefficient according to the first color space signal and the second color space signal;
the light source adjusting module is used for adjusting a first brightness value corresponding to the first color light source and/or the second color light source by using a light source adjusting coefficient to obtain a second brightness value;
and the backlight module driving module is used for driving the first color light source and/or the second color light source by using the second brightness value.
8. A display device comprising a driving system of the display panel according to claim 7.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324222A (en) * | 2011-08-09 | 2012-01-18 | 旭曜科技股份有限公司 | Compensation device and method for display screen image in backlight local dimming system |
| CN104505035A (en) * | 2014-12-18 | 2015-04-08 | 深圳市华星光电技术有限公司 | Conversion method and conversion system of RGB (Red, Green, Blue) data |
| CN106448591A (en) * | 2016-10-13 | 2017-02-22 | 武汉华星光电技术有限公司 | RGB to RGBW color gamut conversion method and device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1816874A4 (en) * | 2004-11-25 | 2010-01-20 | Mitsubishi Electric Corp | Color correction method and color correction device |
| CN100448280C (en) * | 2006-12-28 | 2008-12-31 | 上海广电（集团）有限公司中央研究院 | Self adaptive image display method for environment light |
| CN101115211A (en) * | 2007-08-30 | 2008-01-30 | 四川长虹电器股份有限公司 | Color independent reinforcement processing method |
| JP5023024B2 (en) * | 2007-09-06 | 2012-09-12 | ミツミ電機株式会社 | Color correction circuit and image display apparatus using the same |
| CN101339556B (en) * | 2008-08-18 | 2010-09-29 | 福建四通石材有限公司 | Method for implementing image color similarity contrast by taper cone coordinate |
| JP5157753B2 (en) * | 2008-08-27 | 2013-03-06 | カシオ計算機株式会社 | Image processing apparatus, image processing method, and image processing program |
| CN101866641B (en) * | 2010-03-09 | 2012-06-20 | 华映视讯（吴江）有限公司 | Color adjustment method for image |
| CN102005046A (en) * | 2010-11-10 | 2011-04-06 | 新太科技股份有限公司 | Novel method for detecting image color cast by color saturation detecting technology |
| CN103152583B (en) * | 2013-03-06 | 2014-10-15 | 华东师范大学 | Video image color compensation method and device based on numerical control optical fiber |
| CN105741235B (en) * | 2016-02-29 | 2019-03-29 | 西北工业大学 | Improve the anaglyphs visual rivalry ameliorative way of color fidelity |
| CN107728377B (en) * | 2017-10-31 | 2020-01-17 | 武汉华星光电技术有限公司 | Backlight module and control method of display |
-
2018
- 2018-12-11 CN CN201811510613.4A patent/CN109559692B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324222A (en) * | 2011-08-09 | 2012-01-18 | 旭曜科技股份有限公司 | Compensation device and method for display screen image in backlight local dimming system |
| CN104505035A (en) * | 2014-12-18 | 2015-04-08 | 深圳市华星光电技术有限公司 | Conversion method and conversion system of RGB (Red, Green, Blue) data |
| CN106448591A (en) * | 2016-10-13 | 2017-02-22 | 武汉华星光电技术有限公司 | RGB to RGBW color gamut conversion method and device |
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