WO2019119585A1 - Method for driving display device and display device - Google Patents

Abstract

A method for driving a display device and a display device. The driving method comprises: acquiring a first component, a second component and a third component of each pixel unit (171) in a first color space (S110); acquiring a hue angle value and a saturation degree in a second color space according to a first component average value, a second component average value and a third component average value of the plurality of pixel units (171) (S120); acquiring a minimum target grayscale value of the pixel unit (171) according to the hue angle value and the saturation degree (S130); matching a display grayscale value group corresponding to the pixel unit (171) to a target grayscale value group according to the minimum target grayscale value (S140); and driving the pixel units (171) in the display panel according to the target grayscale value group for display (S150).

Description

Display device driving method and display device Technical field

The present application relates to the field of display technologies, and in particular, to a driving method and a display device for a display device.

Background technique

With the increasing application of liquid crystal display devices, the color shift phenomenon of liquid crystal display devices under large viewing angles has become an urgent problem to be solved in the development of liquid crystal display panels.

The liquid crystal display device generally includes a plurality of pixel units, and the display gray scale value of each pixel unit corresponds to a driving voltage. In the case of a large viewing angle, different driving voltages cause different degrees of phase change of light of different wavelengths, and the influence on the transmittance of light is also different, so that when the driving voltage of the pixel unit is higher, that is, the gray scale of the pixel unit is different. When the time is high, the color of the pixel unit is brighter in the case of a large viewing angle or a positive viewing angle. However, when the driving voltage of the pixel unit drops to a certain extent, that is, the gray level of the pixel unit is low, the vividness of the pixel unit is significantly reduced in the case of a large viewing angle, and the color shift problem of the pixel unit is serious.

Summary of the invention

In view of this, the embodiments of the present application provide a driving method and a display device for a display device, by matching a display grayscale value group corresponding to a pixel unit to a target grayscale value group, and setting a minimum of the target grayscale value group. The target grayscale value is greater than the minimum display grayscale value in the grayscale value group, and the low grayscale value that causes the pixel unit to be severely colored in the grayscale value group is deleted, thereby effectively eliminating the low grayscale pair pixel in the case of the large viewing angle. The effect of the color saturation of the unit optimizes the display effect of the display device.

The embodiment of the present application provides a driving method of a display device. The display device includes a display panel including a plurality of pixel units. The driving method of the display device includes:

Obtaining a first component, a second component, and a third component of each pixel unit in the first color space in the display panel;

Obtaining a hue angle value and a saturation degree in the second color space according to an average value of the first component of the plurality of pixel units, an average value of the second component, and an average value of the third component;

Obtaining a minimum target grayscale value of the pixel unit according to the hue angle value and the saturation;

And matching the display grayscale value group corresponding to the pixel unit to the target grayscale value group according to the minimum target grayscale value, wherein the displaying the grayscale value group and the grayscale value in the target grayscale value group Equal numbers, the minimum target grayscale value being greater than a minimum display grayscale value in the set of grayscale values;

Driving the pixel unit in the display panel to display according to the target gray scale value group.

The embodiment of the present application further provides a display device, including:

The display panel is provided with a plurality of pixel units;

a component acquisition module, configured to acquire a first component, a second component, and a third component of each pixel unit in the first color space in the display panel;

a tone saturation acquisition module, coupled to the component acquisition module, configured to acquire a color tone in the second color space according to an average value of the first component of the plurality of pixel units, an average value of the second component, and an average value of the third component Angle value and saturation;

a minimum target gray scale obtaining module electrically connected to the hue saturation module, configured to acquire a minimum target gray scale value of the pixel unit according to the hue angle value and the saturation;

The matching module is electrically connected to the minimum target grayscale obtaining module, and is configured to match the display grayscale value group corresponding to the pixel unit to the target grayscale value group according to the minimum target grayscale value; wherein the display The grayscale value group is equal to the number of grayscale values in the target grayscale value group, and the minimum target grayscale value is greater than the minimum display grayscale value in the displayed grayscale value group;

The driving module is electrically connected to the matching module and the display panel, and is configured to drive the pixel unit in the display panel to display according to the target grayscale value group;

a backlight module, disposed under the display panel, configured to provide a light source component acquisition module for the display panel, configured to acquire a first component, a second component, and a first component of each pixel unit in the first color space in the display panel Three components

a tone saturation acquisition module, coupled to the component acquisition module, configured to acquire a color tone in the second color space according to an average value of the first component of the pixel unit, an average value of the second component, and an average value of the third component Angle value and saturation;

a minimum target gray scale obtaining module electrically connected to the hue saturation module, configured to acquire a minimum target gray scale value of the pixel unit according to the hue angle value and the saturation;

The matching module is electrically connected to the minimum target grayscale obtaining module, and is configured to match the display grayscale value group corresponding to the pixel unit to the target grayscale value group according to the minimum target grayscale value, wherein the display The grayscale value group is equal to the number of grayscale values in the target grayscale value group, and the minimum target grayscale value is greater than the minimum display grayscale value in the displayed grayscale value group;

a driving module electrically connected to the matching module and the display panel, configured to drive the pixel unit in the display panel to display according to the target grayscale value group;

The backlight module is disposed under the display panel and is configured to provide a light source for the display panel.

The embodiment of the present application further provides a driving method of a display panel having a plurality of pixel units, including:

Obtaining a first component, a second component, and a third component of each pixel unit in the first color space in the display panel;

Obtaining a hue angle value and a saturation degree in the second color space according to an average value of the first component of the plurality of pixel units, an average value of the second component, and an average value of the third component;

Obtaining a minimum target grayscale value of the pixel unit according to the hue angle value and the saturation;

Matching a minimum display grayscale value in the set of grayscale values to the minimum target grayscale value;

Acquiring and displaying the grayscale value group according to the display grayscale value in the display grayscale value group, the brightness corresponding to the minimum target grayscale value, the brightness corresponding to the maximum target grayscale value, and the set gamma value a grayscale value corresponding to the grayscale value corresponding to the display; the grayscale value in the displayed grayscale value group is matched to the corresponding target grayscale value, wherein the display grayscale value is greater than the display grayscale The minimum display grayscale value in the order value group is smaller than the maximum display grayscale value in the display grayscale value group;

Matching a maximum display grayscale value in the display grayscale value group to the maximum target grayscale value; wherein the maximum target grayscale value is greater than a maximum display grayscale value in the display grayscale value group; as well as

Driving the pixel unit in the display panel to display according to the target gray scale value group.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief description of the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are some embodiments of the present application. For the ordinary technicians, other drawings can be obtained based on these drawings without any creative work.

1 is a schematic flowchart of a driving method of a display device according to an embodiment of the present application;

FIG. 2 is a schematic flowchart diagram of another driving method of a display device according to an embodiment of the present disclosure;

FIG. 3 is a schematic flowchart diagram of another driving method of a display device according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a display device according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present application;

FIG. 6 is a schematic flowchart diagram of another driving method of a display device according to an embodiment of the present disclosure.

Detailed ways

The embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Some embodiments, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

FIG. 1 is a schematic flowchart of a driving method of a display device according to an embodiment of the present disclosure. The driving method may be applied to a display device that is required to be driven by a display device, and the method includes the following steps. S110 to step S150.

In step S110, the first component, the second component, and the third component of each pixel unit in the first color space in the display panel are acquired.

In step S120, a hue angle value and a saturation degree in the second color space are acquired according to an average value of the first component of the plurality of pixel units, an average value of the second component, and an average value of the third component.

Exemplarily, the first color space may be an RGB color space, then the first component may be an R component, the second component may be a G component, and the third component may be a B component. Specifically, the RGB color space is defined based on the color recognized by the human eye, and the three values of the hue angle value, the brightness, and the saturation are represented together, so that the R component, the G component, and the B component are related to each other, that is, The R component, the G component, and the B component are not independent of each other.

Illustratively, obtaining a first component, a second component, and a third component of each pixel unit in the first color space in the display panel, thereby obtaining an average value of the first component of all pixel units in the display panel, Ave R, The average of the two components Ave G and the average of the third component Ave B. The second color space may be exemplarily set as an LCH color space, and the RGB color space may be converted into an LCH color space (L is brightness, C is saturation, H is a hue angle value), wherein the brightness L, the saturation C, and The hue angle values H are independent of each other, and the determination of the pixel unit parameters in the display panel can be performed according to a single component. The hue angle value H and the saturation C in the second color space may be acquired according to the average value Ave R of the first component of the acquired pixel unit, the average value Ave G of the second component, and the average value Ave B of the third component, for example , H can be equal to f1 (Ave R, Ave G, Ave B), and C can be equal to f2 (Ave R, Ave G, Ave B).

In step S130, a minimum target grayscale value of the pixel unit is obtained according to the hue angle value and the saturation.

Optionally, the set brightness of the blue backlight module and the green backlight module may be obtained according to the obtained hue angle value and saturation in the acquired second color space. Referring to the LCH color space, when the pixel unit corresponding to the hue angle value is 0°, the pixel unit presents a pure red color; when the pixel unit corresponding to the hue angle value is 90°, the pixel unit presents a pure yellow color; when the pixel unit corresponds to the hue angle When the value is 180°, the pixel unit exhibits pure green color; when the pixel unit corresponds to a hue angle value of 270°, the pixel unit exhibits a pure blue color, and the pixel unit has a hue angle value H that changes from 0° to 360°. The color of the unit is changed from pure red to pure yellow, then to pure green, to gradient to pure blue, and then back to pure red, and the saturation of the pixel unit in the LCH color space can be greater than or equal to 0. Less than or equal to 100, the saturation of 100 represents the most vivid color of the pixel unit.

Optionally, the pixel unit in the display panel may include a red pixel unit, a green pixel unit, and a blue pixel unit, and the minimum of the red pixel unit, the green pixel unit, and the blue pixel unit may be obtained according to the obtained hue angle value and saturation. Target grayscale value.

Exemplarily, according to the range in which the hue angle value H is located, the color of the pixel unit in the display panel may be determined, and then the range in which the acquired saturation C is determined determines that the red pixel unit, the green pixel unit, and the blue pixel unit correspond to each other. The minimum target grayscale value. It should be noted that the determination of the saturation C may be limited according to the user's requirement for the saturation C of the pixel unit in the display panel, which is not limited in this embodiment of the present application. Table 1 exemplarily gives the hue angle value H and the saturation C and the minimum target gray scale value a of the red pixel unit, the minimum target gray scale value b of the green pixel unit, and the minimum target gray scale value c of the blue pixel unit. Corresponding relationship, it should be noted that the embodiment of the present application for the hue angle value H and the saturation C and the minimum target grayscale value a of the red pixel unit, the minimum target grayscale value b of the green pixel unit, and the blue pixel unit The correspondence relationship of the minimum target grayscale value c is not limited to the correspondence shown in Table 1.

Exemplarily, when the hue angle value H is greater than 0° less than or equal to 45°, or greater than 315° is less than or equal to 360°, it may be determined that the color of the display panel is close to red, and the red pixel unit may be exemplarily The minimum target grayscale value is set to 56 or a value close to 56. The minimum target grayscale value of the specific red pixel unit can be set according to the actual production requirements of the display panel. For the green pixel unit and the blue pixel unit, since the ratio of green and blue in the image quality of the display panel is low, the minimum target gray scale value of the green pixel unit and the blue pixel unit can be set to 0 or A value slightly larger than 0. Similarly, the minimum target grayscale value of the specific green pixel unit and the blue pixel unit can be set according to the actual production requirements of the display panel.

Table 1 Correspondence relationship between hue angle value, saturation and pixel unit minimum target grayscale value

Optionally, the minimum target grayscale values corresponding to the red pixel unit, the green pixel unit, and the blue unit may be different. For example, the minimum target grayscale value of the red pixel unit may be 56, the minimum target grayscale value of the green pixel unit may be 32, and the initial setting grayscale value of the blue pixel unit may be 60.

In step S140, the display grayscale value group corresponding to the pixel unit is matched to the target grayscale value group according to the minimum target grayscale value; wherein, the grayscale value group and the target grayscale value group are equal in number of grayscale values. The minimum target grayscale value is greater than the minimum display grayscale value in the displayed grayscale value group.

Alternatively, the minimum display grayscale value in the displayed grayscale value group may be matched to the minimum target grayscale value obtained according to the hue angle value and the saturation. For displaying the grayscale value in the grayscale value group, the display grayscale value smaller than the maximum display grayscale value may be corresponding to the brightness corresponding to the display grayscale value, the minimum target grayscale value, and the maximum target grayscale value. Brightness and setting a gamma value, obtaining a target grayscale value corresponding to the display grayscale values in the grayscale value group, and matching the display grayscale values in the grayscale value group to the corresponding target gray Order value. Matches the maximum display grayscale value in the displayed grayscale value group to the maximum target grayscale value. Since the minimum target grayscale value obtained according to the hue angle value and the saturation in the target grayscale value group corresponding to the pixel unit is larger than the minimum display grayscale value in the display grayscale value group, the low grayscale in the case of the large viewing angle is effectively eliminated. The effect of the color saturation of the pixel unit optimizes the display effect of the display device.

Optionally, the pixel unit may include a red pixel unit, a green pixel unit, and a blue pixel unit, and the display grayscale value group corresponding to the red pixel unit may be matched to the red pixel unit according to the minimum target grayscale value of the red pixel unit. a target grayscale value group; matching the display grayscale value group corresponding to the green pixel unit to the target grayscale value group corresponding to the green pixel unit according to the minimum target grayscale value of the green pixel unit; according to the minimum target of the blue pixel unit The grayscale value matches the display grayscale value group corresponding to the blue pixel unit to the target grayscale value group corresponding to the blue pixel unit.

Optionally, the grayscale values of the pixel units are different, and the brightness of the corresponding pixel unit is also different. The larger the grayscale value corresponding to the pixel unit, the greater the brightness of the pixel unit. Taking the red pixel unit in the display panel as an example, for the display gray scale value group corresponding to the red pixel unit in the display panel, the display gray scale value greater than the minimum display gray scale value and less than the maximum display gray scale value may be displayed according to the display. The grayscale value, the brightness corresponding to the minimum target grayscale value, the brightness corresponding to the maximum target grayscale value, and the set gamma value, and obtain the target grayscale value corresponding to the display grayscale values in the grayscale value group. .

Exemplarily, the minimum target grayscale value of the red pixel unit obtained according to the hue angle value and the saturation may be set to R1, then the brightness corresponding to the minimum target grayscale value may be set to RLR1, and the set gamma value is set to be equal to the red pixel. The unit corresponds to the gamma value of the original gamma curve is γ, and the maximum target gray level value is set to 255, then the brightness corresponding to the maximum target gray level value can be set to RL255. Taking the display grayscale value a0 in the display grayscale value group corresponding to the red pixel unit as an example, where a0 is less than 255 and greater than R1, the target grayscale value a1 corresponding to a0 may be equal to f(a0, RLR1, γ, RL255). , that is, a1 is a display gray scale value a0 in the gray scale value group, a luminance RLR1 corresponding to the minimum target gray scale value R1, a luminance RL255 corresponding to the maximum target grayscale value 255, and a gamma curve corresponding to the original gamma curve corresponding to the red pixel unit. The function of the horse value γ, that is, a1 corresponds to the display gray scale value a0 in the gray scale value group, the brightness RLR1 corresponding to the minimum target gray scale value R1, the brightness RL255 corresponding to the maximum target gray scale value 255, and the corresponding pixel unit of the red pixel unit. The gamma value γ of the original gamma curve is correlated.

Table 2 Correspondence between the display grayscale value group of the pixel unit and the target grayscale value group

For example, Table 2 is a correspondence between a display grayscale value group and a target grayscale value group of a pixel unit in a display panel according to an embodiment of the present disclosure. Taking the number of bits of the display grayscale value group and the target grayscale value group corresponding to the pixel unit in the display panel as 8 bits as an example, as can be seen from Table 2, the display grayscale value group corresponding to the pixel unit of the display panel The number of grayscale values of the target grayscale value group is equal, and the grayscale value corresponding to the pixel unit in the table is displayed in order to avoid the problem that the pixel unit in the display panel is severely colored at a large viewing angle in order to avoid the low grayscale value. The group matches to the corresponding target grayscale value group. For displaying the grayscale value in the grayscale value group, the display grayscale value smaller than the maximum display grayscale value may be corresponding to the brightness corresponding to the display grayscale value, the minimum target grayscale value, and the maximum target grayscale value. The brightness and the set gamma value result in a target grayscale value in the set of grayscale values corresponding to the pixel unit.

Exemplarily, referring to Table 2, the acquisition manners of the target grayscale value groups of the blue pixel unit B and the green pixel unit G and the red pixel unit R are similar, and are not described herein again.

Optionally, the maximum target grayscale value in the target grayscale value group may be set equal to the maximum display grayscale value in the displayed grayscale value group. The minimum target grayscale value R1 in the target grayscale value group corresponding to the pixel unit in the display panel is greater than the minimum display grayscale value 0 in the display grayscale value group corresponding to the pixel unit, in order to improve the display resolution of the display panel, Setting a maximum target grayscale value in the target grayscale value group corresponding to the pixel unit is equal to a maximum display grayscale value in the displayed grayscale value group, so that the minimum target grayscale value in the target grayscale value group corresponding to the pixel unit is The span between the maximum target grayscale values is large, and the display resolution of the display panel is improved while eliminating the influence of the low grayscale on the color saturation of the pixel unit under the large viewing angle.

Optionally, the number of bits of the target grayscale value group may be greater than or equal to the number of bits of the grayscale value group. Exemplarily, when the number of bits of the display grayscale value group corresponding to the pixel unit is 8 bits, the number of bits of the corresponding target grayscale value group can be set to be 8 bits, but is obtained according to the hue angle value and the saturation. The minimum target grayscale value is greater than the minimum display grayscale value in the display grayscale value group, and displaying the same number of bits of the grayscale value group and the target grayscale value group necessarily results in resolution of the pixel unit driven according to the target grayscale value group. Lower than the resolution of the pixel unit driven according to the display grayscale value group, that is, driving the pixel unit in the display panel according to the target grayscale value group causes a decrease in the resolution of the display panel.

In order to avoid the above problem that the pixel unit in the display panel is driven according to the target gray scale value group, the resolution of the display panel is lowered, the number of bits of the target gray scale value group may be set to be larger than the number of bits of the gray scale value group. Exemplarily, when the number of bits of the grayscale value group is 8 bits, the number of bits of the target grayscale value group may be set to 10 bits, and the minimum target grayscale value of the red pixel unit may be exemplarily set to 224, green. The minimum target grayscale value of the pixel unit is 128, the minimum target grayscale value of the blue pixel unit is 240, and the maximum target grayscale value of the three color pixel units is set to 1020. Alternatively, the number of bits of the target grayscale value group may be set to 12 bits, the minimum target grayscale value of the red pixel unit may be set to 896, the minimum target grayscale value of the green pixel unit is 512, and the minimum of the blue pixel unit may be The target grayscale value is 960, and the maximum target grayscale value of the three color pixel units is set to 4080. In this way, the influence of the low gray level on the color saturation of the pixel unit in the case of eliminating the large viewing angle is improved, and the display resolution of the display panel is improved.

In step S150, the pixel unit in the display panel is driven according to the target grayscale value group for display.

The target grayscale value group corresponding to the pixel unit in the display panel obtained according to the above steps drives the pixel unit in the display panel to display, and the minimum value obtained according to the hue angle value and the saturation in the target grayscale value group corresponding to the pixel unit The target grayscale value R1 is greater than the minimum display grayscale value 0 in the display grayscale value group corresponding to the pixel unit, and the partial low grayscale value in the grayscale value group is deleted, which effectively avoids the low grayscale effect in the large viewing angle. The color shift problem of the pixel unit caused by the color saturation of the pixel unit improves the display effect of the display device.

Optionally, FIG. 2 is a schematic flowchart of a driving method of another display device according to an embodiment of the present application. The driving method further includes step S260.

In step S260, the brightness of the backlight module is adjusted according to the minimum display grayscale value in the displayed grayscale value group and the minimum target grayscale value in the target grayscale value group. The ratio of the brightness of the adjusted backlight module to the brightness of the backlight module before the adjustment is equal to the brightness corresponding to the minimum display gray level value in the gray scale value group and the minimum target gray level value in the target gray level value group. The ratio of the brightness.

Optionally, the minimum target grayscale value in the target grayscale value group corresponding to the pixel unit in the display panel is greater than the minimum display grayscale value in the display grayscale value group, so as to display the gray corresponding to the pixel unit in the display panel. The number of bits of the order value group and the target gray scale value group are both 8 bits, and the minimum target gray scale value is R1 as an example (R1 is greater than 0), that is, the minimum brightness of the pixel unit in the display panel is the brightness corresponding to the original 0 gray scale. RL0 is raised to the brightness RLR1 corresponding to the R1 gray level, so that the backlight brightness corresponding to the pixel unit needs to be reduced to maintain the original white point in the display panel. 255 gray-scale red pixel unit R, 255 gray-scale blue pixel unit B And 255 gray-scale green pixel unit G mixed color formation. For example, the brightness of the red backlight module before adjustment can be set to A, and the brightness of the adjusted red backlight module is A'. Then A and A' need to satisfy the following formula:

That is, the ratio of the brightness A' of the adjusted red backlight module to the brightness A of the red backlight module before the adjustment is equal to the brightness RL0 corresponding to the minimum display grayscale value 0 in the grayscale value group and the target grayscale value group. The ratio RLR1 of the luminance corresponding to the minimum target grayscale value R1.

Similarly, the brightness of the green backlight module before adjustment can be set to C, and the brightness of the adjusted green backlight module is C'. Then C and C' need to satisfy the following formula:

That is, the ratio of the brightness C' of the adjusted green backlight module to the brightness C of the green backlight module before the adjustment is equal to the brightness GL0 corresponding to the minimum display grayscale value 0 in the grayscale value group and the target grayscale value group. The ratio GLG1 of the brightness corresponding to the minimum target grayscale value G1.

Similarly, the brightness of the blue backlight module before adjustment can be set to D, and the brightness of the adjusted blue backlight module is D'. Then D and D' need to satisfy the following formula:

That is, the ratio of the brightness D′ of the adjusted blue backlight module to the brightness D of the blue backlight module before adjustment is equal to the brightness BL0 and the target gray level value group corresponding to the minimum display gray scale value 0 in the display gray scale value group. The ratio BLB1 of the luminance corresponding to the minimum target grayscale value B1.

Optionally, FIG. 3 is a schematic flowchart of a driving method of another display device according to an embodiment of the present application. The method may also be performed by the display device provided by the embodiment of the present application. The method includes steps S310 to S370.

In step S310, the pixel unit in the display panel is divided into a plurality of regions, each of which includes a plurality of pixel units.

Optionally, the display panel may include a plurality of pixel units arranged in a matrix, that is, including a plurality of rows and columns of pixel units, and the pixel unit in the display panel may be divided into multiple regions, and each region may include multiple rows and columns of pixels. A unit, that is, a plurality of pixel units in each area.

In step S320, the first component, the second component, and the third component of each pixel unit in the first color space are acquired.

Optionally, the first component, the second component, and the third component of each pixel unit in each region after the partitioning are obtained, thereby obtaining an average of the first components of all the pixel units in the region. The value Ave R', the average value of the second component Ave G', and the average value of the third component Ave B'.

In step S330, the hue angle value and the saturation in the second color space are acquired according to the average value of the first component of the pixel unit in the region, the average value of the second component, and the average value of the third component.

Alternatively, the hue angle of the second color space may be acquired according to the average value Ave R′ of the first component of the pixel unit in the region, the average value Ave G′ of the second component, and the average value Ave B′ of the third component. Value H' and saturation C'. Illustratively, H' may be equal to f1 (Ave R', Ave G', Ave B'), and C' may be equal to f2 (Ave R', Ave G', Ave B').

At step S340, a minimum target grayscale value of the pixel unit in the region is acquired according to the hue angle value and the saturation.

Exemplarily, the color represented by the pixel unit in the region of the display panel may be determined according to the hue angle value, and then the range of the acquired saturation is determined, and the minimum target grayscale value of the red pixel unit R in the region is determined to be R1. The minimum target grayscale value of the green pixel unit is G1, and the minimum target grayscale value of the blue pixel unit is B1.

In step S350, the display grayscale value group corresponding to the pixel unit in the region is matched to the target grayscale value group corresponding to the pixel unit in the region according to the minimum target grayscale value of the pixel unit in the region.

Exemplarily, the minimum display grayscale value in the set of grayscale values corresponding to the pixel unit in the region may be matched to the minimum target grayscale value in the target grayscale value group obtained according to the hue angle value and the saturation; Matching a maximum display grayscale value in a display grayscale value group corresponding to the pixel unit in the region to a maximum target grayscale value in the target grayscale value group; according to the display grayscale value group being greater than a minimum display grayscale value, a display grayscale value smaller than the maximum display grayscale value, a brightness corresponding to the minimum target grayscale value, a brightness corresponding to the maximum target grayscale value, and a set gamma value acquisition and display display grayscale value in the grayscale value group A corresponding target grayscale value, and matching the displayed grayscale values in the displayed grayscale value group to the target grayscale value.

In step S360, the pixel unit in the area is driven to display according to the target grayscale value group corresponding to the pixel unit in the area.

The target gray scale value group corresponding to the pixel unit in the display panel obtained according to the above steps drives the pixel unit in the display panel to display, according to the hue angle value in the target gray scale value group corresponding to the pixel unit in the region The minimum target grayscale value obtained by the saturation and the saturation is greater than the minimum display grayscale value in the display grayscale value group corresponding to the pixel unit, thereby effectively avoiding the pixel caused by the color saturation of the pixel unit in the region under the large viewing angle. The color shift problem of the unit improves the display effect of the display device.

In step S370, the brightness of the backlight module corresponding to the area is adjusted according to the minimum display grayscale value of the display grayscale value group corresponding to the pixel unit in the region and the minimum target grayscale value corresponding to the pixel unit in the region.

Illustratively, FIG. 4 is a schematic structural diagram of a display device according to an embodiment of the present application. The display device may be, for example, a liquid crystal display device. As shown in FIG. 4, the display device may include a display panel and a backlight module 15 located under the display panel, and the backlight module 15 is provided to provide a display light source for display. The display panel may include an array substrate 16 adjacent to the backlight module, and a color filter substrate 17 (only a partial region is shown) on the side of the array substrate 16 away from the backlight module 15. The backlight module 15 may include a plurality of red backlight modules 151, a green backlight module 152, and a blue backlight module 153. The color filter substrate 17 may correspondingly include a plurality of pixel units 171 (illustratively shown in FIG. 4 Each of the pixel units 171 includes a red pixel unit R, a green pixel unit G, and a blue pixel unit B. The light emitted by the backlight module 15 can be irradiated onto the liquid crystal layer (not shown) between the array substrate 16 and the color filter substrate 17 through the opening region 161 on the array substrate 16 to realize the normal function of the liquid crystal display panel.

Exemplarily, as shown in FIG. 4, a region 172 formed by a pixel unit may be provided with a backlight module area A composed of a red backlight module 151, a green backlight module 152, and a blue backlight module 153, which may be according to the area 172. The minimum display grayscale value of the display grayscale value group corresponding to the pixel unit and the minimum target grayscale value corresponding to the pixel unit in the region 172 adjust the brightness of the backlight module 151 corresponding to the region 172.

By dividing the pixel unit in the display panel into a plurality of regions and adjusting the brightness of the backlight module of a certain region formed by the corresponding pixel unit, the brightness of the backlight module in the display device is accurately adjusted, and the display panel is maintained. The original white point in the middle may be formed by a mixture of 255 gray-scale red pixel units R, 255 gray-scale blue pixel units B, and 255 gray-scale green pixel units G.

It should be noted that the drawings of the embodiments of the present application are merely illustrative of the size of each component and do not represent the actual dimensions of the components in the display panel.

FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present application. As shown in FIG. 5, the display device includes a component acquisition module 11, a hue saturation acquisition module 12, a minimum target grayscale acquisition module 13, a matching module 14, a drive module 15, and a backlight module (not shown). The tone saturation acquisition module 12 is electrically connected to the component acquisition module 11 and the minimum target gray scale acquisition module 13 respectively, and the matching module 14 is electrically connected to the set termination gray scale module 13 and the drive module 15, respectively. The driving module 15 is also electrically connected to the display panel, and the backlight module is disposed below the display panel and is configured to provide a light source for the display panel. The component acquisition module 11 is arranged to acquire a first component, a second component, and a third component of each pixel unit in the display panel 16 in the first color space. The hue saturation acquisition module 12 is configured to acquire a hue angle value and a saturation in the second color space according to an average value of the first component of the pixel unit, an average value of the second component, and an average value of the third component. The minimum target gray scale acquisition module 13 is configured to acquire a minimum target gray scale value of the pixel unit according to the hue angle value and the saturation. The matching module 14 is configured to match the display grayscale value group corresponding to the pixel unit to the target grayscale value group according to the minimum target grayscale value, wherein the grayscale value group and the target grayscale value group are equal in number of grayscale values. The minimum target grayscale value is greater than the minimum display grayscale value in the displayed grayscale value group. The driving module 15 is configured to drive the pixel units in the display panel to display according to the target grayscale value group. For example, the display device may be a liquid crystal display device including an array substrate and a color filter substrate, and liquid crystal molecules between the array substrate and the color filter substrate, and the liquid crystal molecules are under the voltage between the array substrate and the color filter substrate. Deflection occurs to realize the display function of the liquid crystal display device.

FIG. 6 is a schematic flowchart diagram of another driving method of a display device according to an embodiment of the present disclosure. The driving method can be applied to a scene that needs to drive the display device to perform a flat display, and can be executed by the display device provided by the embodiment of the present application. The method includes steps S410 to S480.

In step S410, the first component, the second component, and the third component of each pixel unit in the first color space in the display panel are acquired.

In step S420, the hue angle value and the saturation in the second color space are acquired according to the average value of the first component of the pixel unit, the average value of the second component, and the average value of the third component.

At step S430, a minimum target grayscale value of the pixel unit is obtained according to the hue angle value and the saturation.

In step S440, the minimum display grayscale value in the displayed grayscale value group is matched to the minimum target grayscale value.

In step S450, according to the display grayscale value in the grayscale value group, the brightness corresponding to the minimum target grayscale value, the brightness corresponding to the maximum target grayscale value, and the set gamma value, the acquired and displayed grayscale value groups are obtained. The target grayscale value in the target grayscale value group corresponding to the grayscale value is displayed one by one.

In step S460, the grayscale value in the displayed grayscale value group is matched to the corresponding target grayscale value; wherein, the displayed grayscale value in the grayscale value group is greater than the minimum display grayscale value, and less than the maximum display grayscale value. .

In step S470, the maximum display grayscale value in the displayed grayscale value group is matched to the maximum target grayscale value; wherein the minimum target grayscale value is greater than the minimum display grayscale value in the displayed grayscale value group.

In step S480, the pixel unit in the display panel is driven according to the target grayscale value group for display.

The embodiment of the present application provides that the minimum grayscale value in the target grayscale value group obtained by the pixel unit is greater than the display gray by matching the display grayscale value group corresponding to the pixel unit to the target grayscale value group. The minimum display grayscale value in the order value group, and driving the pixel unit in the display panel according to the matched target grayscale value group for display, deleting some low grayscale values in the display grayscale value group, effectively eliminating the large The effect of the low gray level value on the color saturation of the pixel unit under the viewing angle optimizes the display effect of the display device.

Claims (20)

1. A driving method of a display device, the display device includes a display panel, the display panel includes a plurality of pixel units, and the driving method of the display device includes:

   Obtaining a first component, a second component, and a third component of each pixel unit in the first color space in the display panel;

   Obtaining a hue angle value and a saturation degree in the second color space according to an average value of the first component of the plurality of pixel units, an average value of the second component, and an average value of the third component;

   Obtaining a minimum target grayscale value of the pixel unit according to the hue angle value and the saturation;

   And matching the display grayscale value group corresponding to the pixel unit to the target grayscale value group according to the minimum target grayscale value; wherein the displaying the grayscale value group and the grayscale value in the target grayscale value group The number of the minimum target grayscale values is greater than the minimum display grayscale value in the set of grayscale values;

   Driving the pixel unit in the display panel to display according to the target gray scale value group.
2. The driving method according to claim 1, wherein the matching the display grayscale value group corresponding to the pixel unit to the target grayscale value group comprises:

   Matching a minimum display grayscale value in the set of grayscale values to the minimum target grayscale value;

   Acquiring and displaying the grayscale value group according to the display grayscale value in the display grayscale value group, the brightness corresponding to the minimum target grayscale value, the brightness corresponding to the maximum target grayscale value, and the set gamma value a grayscale value corresponding to the grayscale value corresponding to the display; the display grayscale value in the display grayscale value group is matched to the corresponding target grayscale value, wherein the display grayscale value is greater than the display The minimum display grayscale value in the grayscale value group is smaller than the maximum display grayscale value in the displayed grayscale value group;

   Matching a maximum display grayscale value in the set of grayscale values to the maximum target grayscale value.
3. The driving method according to claim 1, wherein the number of bits of the target grayscale value group is greater than or equal to the number of bits of the display grayscale value group.
4. The driving method according to claim 1, further comprising:

   Adjusting a brightness of the backlight module according to the minimum display grayscale value and the minimum target grayscale value in the display grayscale value group;

   The ratio of the brightness of the adjusted backlight module to the brightness of the backlight module before the adjustment is equal to the brightness corresponding to the minimum display grayscale value in the display grayscale value group and the brightness corresponding to the minimum target grayscale value. ratio.
5. The driving method according to claim 1, wherein the pixel unit comprises a red pixel unit, a green pixel unit, and a blue pixel unit;

   The obtaining the minimum target grayscale value of the pixel unit according to the hue angle value and the saturation includes:

   Obtaining a minimum target grayscale value of the red pixel unit, the green pixel unit, and the blue pixel unit according to the hue angle value and the saturation;

   The matching the display grayscale value group corresponding to the pixel unit to the target grayscale value group according to the minimum target grayscale value includes:

   And matching, according to the minimum target grayscale value of the red pixel unit, a display grayscale value group corresponding to the red pixel unit to a target grayscale value group corresponding to the red pixel unit; according to the minimum target of the green pixel unit a grayscale value, the display grayscale value group corresponding to the green pixel unit is matched to the target grayscale value group corresponding to the green pixel unit; and the blue is according to a minimum target grayscale value of the blue pixel unit The display grayscale value group corresponding to the color pixel unit is matched to the target grayscale value group corresponding to the blue pixel unit;

   The minimum target grayscale values corresponding to the red pixel unit, the green pixel unit, and the blue pixel unit are different.
6. The driving method according to claim 1, wherein a maximum display grayscale value in the display grayscale value group is the same as a maximum target grayscale value in the target grayscale value group.
7. The driving method according to claim 1, further comprising:

   Dividing the pixel unit in the display panel into a plurality of regions, each of the regions including a plurality of the pixel units;

   Obtaining a first component, a second component, and a third component of the pixel unit in the region in a first color space;

   Obtaining a hue angle value and a saturation degree in the second color space according to an average value of the first component of the pixel unit in the region, an average value of the second component, and an average value of the third component;

   Obtaining a minimum target grayscale value of the pixel unit in the region according to the hue angle value and the saturation;

   Matching a display grayscale value group corresponding to the pixel unit in the region to a target grayscale value group corresponding to the pixel unit in the region according to a minimum target grayscale value of the pixel unit in the region;

   The pixel units in the area are driven for display according to a target gray scale value group corresponding to the pixel unit in the area.
8. The driving method according to claim 7, further comprising:

   Adjusting a backlight corresponding to the area according to a minimum display grayscale value of the display grayscale value group corresponding to the pixel unit in the area and the minimum target grayscale value corresponding to the pixel unit in the area The brightness of the module.
9. The driving method according to claim 7, wherein the first color space is a red-green-blue color space, the first component may be a red component, the second component may be a green component, and the third component may be a blue component. Color component.
10. The driving method according to claim 1, wherein the pixel unit comprises a red pixel unit, a green pixel unit, and a blue pixel unit, and the grayscale value group corresponding to the red pixel unit is displayed according to the minimum target grayscale value of the red pixel unit. Matching to the target grayscale value group corresponding to the red pixel unit; matching the display grayscale value group corresponding to the green pixel unit to the target grayscale value group corresponding to the green pixel unit according to the minimum target grayscale value of the green pixel unit; The minimum target grayscale value of the color pixel unit matches the display grayscale value group corresponding to the blue pixel unit to the target grayscale value group corresponding to the blue pixel unit.
11. The driving method according to claim 1, wherein the second color space is a luminance-saturation-tone angle value color space.
12. A display device comprising:

    a display panel provided with a plurality of pixel units;

    a component acquisition module, configured to acquire a first component, a second component, and a third component of each pixel unit in the first color space in the display panel;

    a tone saturation acquisition module, coupled to the component acquisition module, configured to acquire a color tone in the second color space according to an average value of the first component of the plurality of pixel units, an average value of the second component, and an average value of the third component Angle value and saturation;

    a minimum target gray scale obtaining module electrically connected to the hue saturation module, configured to acquire a minimum target gray scale value of the pixel unit according to the hue angle value and the saturation;

    The matching module is electrically connected to the minimum target grayscale obtaining module, and is configured to match the display grayscale value group corresponding to the pixel unit to the target grayscale value group according to the minimum target grayscale value, wherein the display The grayscale value group is equal to the number of grayscale values in the target grayscale value group, and the minimum target grayscale value is greater than the minimum display grayscale value in the displayed grayscale value group;

    The driving module is electrically connected to the matching module and the display panel, and is configured to drive the pixel unit in the display panel to display according to the target grayscale value group;

    The backlight module is disposed under the display panel and is configured to provide a light source for the display panel.
13. The display device according to claim 12, wherein when the display grayscale value group corresponding to the pixel unit is matched to the target grayscale value group according to the minimum target grayscale value, the matching module is set to:

    Matching a minimum display grayscale value in the set of grayscale values to the minimum target grayscale value;

    Acquiring and displaying the grayscale value group according to the display grayscale value in the display grayscale value group, the brightness corresponding to the minimum target grayscale value, the brightness corresponding to the maximum target grayscale value, and the set gamma value a grayscale value corresponding to the grayscale value corresponding to the display; the display grayscale value in the display grayscale value group is matched to the corresponding target grayscale value; wherein the display grayscale value is greater than the display a minimum display grayscale value in the grayscale value group, less than a maximum display grayscale value in the displayed grayscale value group;

    Matching a maximum display grayscale value in the set of grayscale values to the maximum target grayscale value.
14. The display device according to claim 12, wherein the number of bits of the target grayscale value group is greater than or equal to the number of bits of the display grayscale value group.
15. The display device according to claim 12, wherein the display device is further configured to:

    Adjusting a brightness of the backlight module according to the minimum display grayscale value and the minimum target grayscale value in the display grayscale value group, wherein a ratio of the brightness of the adjusted backlight module to the brightness of the backlight module before the adjustment is equal to And displaying a ratio of a brightness corresponding to a minimum display grayscale value in the grayscale value group to a brightness corresponding to the minimum target grayscale value.
16. The display device according to claim 12, wherein the pixel unit comprises a red pixel unit, a green pixel unit, and a blue pixel unit;

    The minimum target grayscale acquisition module is set to:

    Obtaining a minimum target grayscale value of the red pixel unit, the green pixel unit, and the blue pixel unit according to the hue angle value and the saturation;

    And matching, according to the minimum target grayscale value of the red pixel unit, a display grayscale value group corresponding to the red pixel unit to a target grayscale value group corresponding to the red pixel unit; according to the minimum target of the green pixel unit a grayscale value, the display grayscale value group corresponding to the green pixel unit is matched to the target grayscale value group corresponding to the green pixel unit; and the blue is according to a minimum target grayscale value of the blue pixel unit The display grayscale value group corresponding to the color pixel unit is matched to the target grayscale value group corresponding to the blue pixel unit;

    The minimum target grayscale values corresponding to the red pixel unit, the green pixel unit, and the blue pixel unit are different.
17. The display device according to claim 12, wherein the maximum display grayscale value in the display grayscale value group is the same as the maximum target grayscale value in the target grayscale value group.
18. The display device according to claim 12, wherein the display device is further configured to:

    Dividing the pixel unit in the display panel into a plurality of regions, each of the regions including a plurality of the pixel units;

    Obtaining a first component, a second component, and a third component of the pixel unit in the region in a first color space;

    Obtaining a hue angle value and a saturation degree in the second color space according to an average value of the first component of the pixel unit in the region, an average value of the second component, and an average value of the third component;

    Obtaining a minimum target grayscale value of the pixel unit in the region according to the hue angle value and the saturation;

    Matching, by the minimum target grayscale value of the pixel unit in the region, the display grayscale value group corresponding to the pixel unit in the region to the target grayscale value group corresponding to the pixel unit in the region;

    The pixel units in the area are driven for display according to a target gray scale value group corresponding to the pixel unit in the area.
19. The display device according to claim 18, wherein the display device is further configured to: according to a minimum display grayscale value of the display grayscale value group corresponding to a pixel unit in the region, and a The minimum target grayscale value corresponding to the pixel unit adjusts the brightness of the backlight module corresponding to the region.
20. A driving method of a display panel including a plurality of pixel units, comprising:

    Obtaining a first component, a second component, and a third component of each pixel unit in the first color space in the display panel;

    Obtaining a hue angle value and a saturation degree in the second color space according to an average value of the first component of the plurality of pixel units, an average value of the second component, and an average value of the third component;

    Obtaining a minimum target grayscale value of the pixel unit according to the hue angle value and the saturation;

    Matching a minimum display grayscale value in the set of grayscale values to the minimum target grayscale value;

    Acquiring and displaying the grayscale value group according to the display grayscale value in the display grayscale value group, the brightness corresponding to the minimum target grayscale value, the brightness corresponding to the maximum target grayscale value, and the set gamma value a grayscale value corresponding to the grayscale value corresponding to the display; the grayscale value in the displayed grayscale value group is matched to the corresponding target grayscale value, wherein the display grayscale value is greater than the display grayscale The minimum display grayscale value in the order value group is smaller than the maximum display grayscale value in the display grayscale value group;

    Matching a maximum display grayscale value in the display grayscale value group to the maximum target grayscale value, wherein the maximum target grayscale value is greater than a maximum display grayscale value in the display grayscale value group; as well as

    Driving the pixel unit in the display panel to display according to the target gray scale value group.

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