WO2019119585A1 - 显示装置的驱动方法及显示装置 - Google Patents
显示装置的驱动方法及显示装置 Download PDFInfo
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- WO2019119585A1 WO2019119585A1 PCT/CN2018/072823 CN2018072823W WO2019119585A1 WO 2019119585 A1 WO2019119585 A1 WO 2019119585A1 CN 2018072823 W CN2018072823 W CN 2018072823W WO 2019119585 A1 WO2019119585 A1 WO 2019119585A1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
Definitions
- 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.
- 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.
- 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.
- 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.
- 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.
- 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:
- 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
- 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:
- 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;
- FIG. 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
- FIG. 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.
- 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.
- 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.
- 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.
- the first color space may be an RGB color space
- the first component may be an R component
- the second component may be a G component
- the third component may be a B component.
- 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.
- 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).
- step S130 a minimum target grayscale value of the pixel unit is obtained according to the hue angle value and the saturation.
- 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.
- the pixel unit corresponding to the hue angle value 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
- 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.
- 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 may be obtained according to the obtained hue angle value and saturation.
- 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.
- 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.
- 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.
- 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.
- 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.
- the minimum target grayscale values corresponding to the red pixel unit, the green pixel unit, and the blue unit may be different.
- 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
- the initial setting grayscale value of the blue pixel unit may be 60.
- 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.
- 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.
- 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.
- 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.
- the pixel unit may include a red pixel unit, a green pixel unit, and a blue pixel unit
- 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.
- the grayscale values of the pixel units are different, and the brightness of the corresponding pixel unit is also different.
- 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 minimum target grayscale value of the red pixel unit obtained according to the hue angle value and the saturation may be set to R1
- the brightness corresponding to the minimum target grayscale value may be set to RLR1
- 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 ⁇
- the maximum target gray level value is set to 255
- the brightness corresponding to the maximum target gray level value can be set to RL255.
- the target grayscale value a1 corresponding to a0 may be equal to f(a0, RLR1, ⁇ , RL255).
- 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 ⁇ 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 ⁇ of the original gamma curve is correlated.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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
- 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.
- 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
- the minimum of the blue pixel unit may be
- the target grayscale value is 960
- the maximum target grayscale value of the three color pixel units is set to 4080.
- 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.
- 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.
- 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.
- 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.
- 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:
- 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 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:
- 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 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:
- 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.
- 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.
- 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.
- 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.
- step S320 the first component, the second component, and the third component of each pixel unit in the first color space are acquired.
- 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' are obtained, thereby obtaining an average of the first components of all the pixel units in the region.
- 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.
- 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' may be equal to H' and f1 (Ave R', Ave G', Ave B'), and C' may be equal to f2 (Ave R', Ave G', Ave B').
- a minimum target grayscale value of the pixel unit in the region is acquired according to the hue angle value and the saturation.
- 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
- the minimum target grayscale value of the blue pixel unit is B1.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present application.
- 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
- 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.
- 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.
- 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.
- 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.
- a minimum target grayscale value of the pixel unit is obtained according to the hue angle value and the saturation.
- step S440 the minimum display grayscale value in the displayed grayscale value group is matched to the minimum target grayscale value.
- 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.
- 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.
- 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.
- 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 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.
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Abstract
一种显示装置的驱动方法及显示装置。驱动方法包括获取每个像素单元(171)在第一颜色空间中的第一分量、第二分量和第三分量(S110)；根据多个像素单元(171)的第一分量平均值、第二分量平均值和第三分量平均值获取第二颜色空间中的色调角度值和饱和度(S120)；根据色调角度值和饱和度获取像素单元(171)的最小目标灰阶值(S130)；根据最小目标灰阶值将像素单元(171)对应的显示灰阶值组匹配至目标灰阶值组(S140)，根据目标灰阶值组驱动显示面板中的像素单元(171)进行显示(S150)。
Description
本申请涉及显示技术领域，尤其涉及一种显示装置的驱动方法及显示装置。
随着液晶显示装置的应用越来越广泛，液晶显示装置在大视角情况下的色偏现象已成为液晶显示面板发展急需解决的问题。
液晶显示装置中一般包括多个像素单元，每个像素单元的显示灰阶值对应一驱动电压。在大视角情况下，不同的驱动电压使得不同波长光的相位延迟的变化程度不同，对光的穿透率的影响也不同，使得当像素单元的驱动电压较高，即像素单元的灰阶较高时，无论是大视角情况下还是正视角情况下像素单元的色彩均比较鲜艳。但是当像素单元的驱动电压下降到一定程度，即像素单元的灰阶较低时，大视角情况下像素单元的鲜艳度明显下降，像素单元色偏问题严重。
发明内容
有鉴于此，本申请实施例提供了一种显示装置的驱动方法及显示装置，通过将像素单元对应的显示灰阶值组匹配至目标灰阶值组，且设置目标灰阶值组中的最小目标灰阶值大于显示灰阶值组中的最小显示灰阶值，删除了显示灰阶值组中导致像素单元色偏严重的低灰阶值，有效消除了大视角情况下低灰阶对像素单元色彩饱和度的影响，优化了显示装置的显示效果。
本申请实施例提供了一种显示装置的驱动方法。所述显示装置包括显示面板，所述显示面板包括多个像素单元。所述显示装置的驱动方法包括：
获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量；
根据多个像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度；
根据所述色调角度值和所述饱和度获取所述像素单元的最小目标灰阶值；
根据所述最小目标灰阶值将所述像素单元对应的显示灰阶值组匹配至目标灰阶值组，其中，所述显示灰阶值组与所述目标灰阶值组中的灰阶值个数相等，所述最小目标灰阶值大于所述显示灰阶值组中的最小显示灰阶值；以及
根据所述目标灰阶值组驱动所述显示面板中的所述像素单元进行显示。
本申请实施例还提供了一种显示装置，包括：
显示面板设置有多个像素单元；
分量获取模块，设置为获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量；
色调饱和度获取模块，与所述分量获取模块连接，设置为根据多个像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度；
最小目标灰阶获取模块，与所述色调饱和度模块电连接，设置为根据所述色调角度值和所述饱和度获取所述像素单元的最小目标灰阶值；
匹配模块，与所述最小目标灰阶获取模块电连接，设置为根据所述最小目标灰阶值将所述像素单元对应的显示灰阶值组匹配至目标灰阶值组；其中，所述显示灰阶值组与所述目标灰阶值组中的灰阶值个数相等，所述最小目标灰阶 值大于所述显示灰阶值组中的最小显示灰阶值；
驱动模块，与所述匹配模块和显示面板电连接，设置为根据所述目标灰阶值组驱动所述显示面板中的所述像素单元进行显示；
背光模块，设置于所述显示面板下方，设置为为所述显示面板提供光源分量获取模块，用于获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量；
色调饱和度获取模块，与所述分量获取模块连接，设置为根据所述像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度；
最小目标灰阶获取模块，与所述色调饱和度模块电连接，设置为根据所述色调角度值和所述饱和度获取所述像素单元的最小目标灰阶值；
匹配模块，与所述最小目标灰阶获取模块电连接，设置为根据所述最小目标灰阶值将所述像素单元对应的显示灰阶值组匹配至目标灰阶值组，其中，所述显示灰阶值组与所述目标灰阶值组中的灰阶值个数相等，所述最小目标灰阶值大于所述显示灰阶值组中的最小显示灰阶值；
驱动模块，与所述匹配模块和显示面板电连接，设置为根据所述目标灰阶值组驱动所述显示面板中的所述像素单元进行显示；以及
背光模块，设置于所述显示面板下方，设置为所述显示面板提供光源。
本申请实施例还提供了一种具有多个像素单元的显示面板的驱动方法，包括：
获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量；
根据多个像素单元的第一分量的平均值、第二分量的平均值和第三分量的 平均值获取第二颜色空间中的色调角度值和饱和度；
根据所述色调角度值和所述饱和度获取所述像素单元的最小目标灰阶值；
将所述显示灰阶值组中的最小显示灰阶值匹配至所述最小目标灰阶值；
根据所述显示灰阶值组中的显示灰阶值、所述最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定伽马值，获取与所述显示灰阶值组中的显示灰阶值一一对应的目标灰阶值；将所述显示灰阶值组中的灰阶值匹配至对应的目标灰阶值，其中，所述显示灰阶值大于所述显示灰阶值组中的最小显示灰阶值，小于所述显示灰阶值组中的最大显示灰阶值；
将所述显示灰阶值组中的最大显示灰阶值匹配至所述最大目标灰阶值；其中，所述最大目标灰阶值大于所述显示灰阶值组中的最大显示灰阶值；以及
根据所述目标灰阶值组驱动所述显示面板中的所述像素单元进行显示。
为了更清楚地说明本申请实施例的技术方案，下面将对实施例所需要使用的附图做一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的一种显示装置的驱动方法的流程示意图；
图2为本申请实施例提供的另一种显示装置的驱动方法的流程示意图；
图3为本申请实施例提供的另一种显示装置的驱动方法的流程示意图；
图4为本申请实施例提供的一种显示装置的结构示意图；
图5为本申请实施例提供的一种显示装置的结构示意图；以及
图6为本申请实施例提供的另一种显示装置的驱动方法的流程示意图。
为使本申请的目的、技术方案和优点更加清楚，以下将参照本申请实施例中的附图，通过实施方式清楚、完整地描述本申请的技术方案，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
图1为本申请实施例提供的一种显示装置的驱动方法的流程示意图，驱动方法可以应用在需要对显示装置进行驱动的场景，可以由本申请实施例提供的显示装置来执行，该方法包括步骤S110至步骤S150。
在步骤S110、获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量。
在步骤S120、根据多个像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度。
示例性的，第一颜色空间可以是RGB颜色空间，则第一分量可以为R分量，第二分量可以为G分量，第三分量可以为B分量。具体的，RGB颜色空间是基于人眼识别的颜色进行定义的，其将色调角度值、亮度和饱和度三个量放在一起表示，使得R分量、G分量和B分量之间互相关联，即R分量、G分量和B分量互相不独立。
示例性的，获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量，进而获取显示面板中所有像素单元的第一分量的平均值Ave R、第二分量的平均值Ave G和第三分量的平均值Ave B。可以示例性地设置第二颜色空间为LCH颜色空间，可以将RGB颜色空间转换至LCH颜色空间(L为亮度，C为饱和度，H为色调角度值)，其中的亮度L、饱和度C和色调角度值H 都是相互独立的，可以依据单个分量进行显示面板中像素单元参数的判定。根据获取的像素单元的第一分量的平均值Ave R、第二分量的平均值Ave G和第三分量的平均值Ave B可以获取第二颜色空间中的色调角度值H和饱和度C，例如，H可以等于f1(Ave R，Ave G，Ave B)，C可以等于f2(Ave R，Ave G，Ave B)。
在步骤S130、根据色调角度值和饱和度获取像素单元的最小目标灰阶值。
可选地，可以根据获取的第二颜色空间中的色调角度值和饱和度获取蓝色背光模块和绿色背光模块的设定亮度。参照LCH颜色空间，当像素单元对应的色调角度值为0°时，像素单元呈现纯正红色；当像素单元对应的色调角度值为90°时，像素单元呈现纯正黄色；当像素单元对应的色调角度值为180°时，像素单元呈现纯正绿色；当像素单元对应的色调角度值为270°时，像素单元呈现纯正蓝色，随着像素单元的色调角度值H从0°变化至360°，像素单元呈现的颜色由纯正红色渐变至纯正黄色、再渐变至纯正绿色、在渐变至纯正蓝色、再渐变回纯正红色，且像素单元在LCH颜色空间中的饱和度的范围可以是大于等于0，小于等于100，饱和度为100时代表像素单元的色彩最鲜艳。
可选的，显示面板中的像素单元可以包括红色像素单元、绿色像素单元和蓝色像素单元，可以根据获取的色调角度值和饱和度获取红色像素单元、绿色像素单元和蓝色像素单元的最小目标灰阶值。
示例性的，根据色调角度值H所处的范围可以判定显示面板中的像素单元呈现的颜色，再判定获取的饱和度C所处的范围确定红色像素单元、绿色像素单元和蓝色像素单元对应的最小目标灰阶值。需要说明的是，对饱和度C的判定可以根据用户对显示面板中像素单元的饱和度C的需求进行具体范围的限定，本申请实施例对此不作限定。表1示例性地给出了色调角度值H和饱和度C与红色像素单 元的最小目标灰阶值a、绿色像素单元的最小目标灰阶值b以及蓝色像素单元的最小目标灰阶值c的对应关系，需要说明的是，本申请实施例对色调角度值H和饱和度C与红色像素单元的最小目标灰阶值a、绿色像素单元的最小目标灰阶值b以及蓝色像素单元的最小目标灰阶值c的对应关系并不限于表1所示的对应关系。
示例性的，当色调角度值H大于0°小于或等于45°，或者大于315°小于或等于360°时，可以判定显示面板的画质呈现的颜色接近红色，可以示例性地将红色像素单元的最小目标灰阶值设定为56或者接近56的值，具体红色像素单元的最小目标灰阶值可以根据显示面板的实际生产需求进行设定。而对于绿色像素单元以及蓝色像素单元，由于绿色与蓝色在显示面板的画质中占的比例较低，可以将绿色像素单元以及蓝色像素单元的最小目标灰阶值设定为0或者稍大于0的值，同样的，具体绿色像素单元以及蓝色像素单元的最小目标灰阶值可以根据显示面板的实际生产需求进行设定。
表1色调角度值、饱和度与像素单元最小目标灰阶值的对应关系表
可选的，红色像素单元、绿色像素单元和蓝色单元对应的最小目标灰阶值可以不同。例如，红色像素单元的最小目标灰阶值可以为56，绿色像素单元的最小目标灰阶值可以为32，蓝色像素单元的初始设定灰阶值可以为60。
在步骤S140、根据最小目标灰阶值将像素单元对应的显示灰阶值组匹配至目标灰阶值组；其中，显示灰阶值组与目标灰阶值组中的灰阶值个数相等，最小目标灰阶值大于显示灰阶值组中的最小显示灰阶值。
可选的，可以将显示灰阶值组中的最小显示灰阶值匹配至根据色调角度值和饱和度获得的最小目标灰阶值。对于显示灰阶值组中大于最小显示灰阶值，小于最大显示灰阶值的显示灰阶值，可以根据这些显示灰阶值、最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定伽马值，获取与显示灰阶值组中的这些显示灰阶值一一对应的目标灰阶值，将显示灰阶值组中的这些显示灰阶值匹配至对应的目标灰阶值。将显示灰阶值组中的最大显示灰阶值匹配至最大目标灰阶值。由于像素单元对应的目标灰阶值组中的根据色调角度值和饱和度获得的最小目标灰阶值大于显示灰阶值组中的最小显示灰阶值，有效消除了大视角情况下低灰阶对像素单元色彩饱和度的影响，优化了显示装置的显示效果。
可选的，像素单元可以包括红色像素单元、绿色像素单元和蓝色像素单元，可以根据红色像素单元的最小目标灰阶值，将红色像素单元对应的显示灰阶值组匹配至红色像素单元对应的目标灰阶值组；根据绿色像素单元的最小目标灰阶值，将绿色像素单元对应的显示灰阶值组匹配至绿色像素单元对应的目标灰阶值组；根据蓝色像素单元的最小目标灰阶值，将蓝色像素单元对应的显示灰阶值组匹配至蓝色像素单元对应的目标灰阶值组。
可选地，像素单元的灰阶值不同，对应像素单元呈现出的亮度也不同，像 素单元对应的灰阶值越大，像素单元的亮度越大。以显示面板中的红色像素单元为例，对于显示面板中的红色像素单元对应的显示灰阶值组中大于最小显示灰阶值，小于最大显示灰阶值的显示灰阶值，可以根据这些显示灰阶值、最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定伽马值，获取与显示灰阶值组中的这些显示灰阶值一一对应的目标灰阶值。
示例性的，可以设置根据色调角度值和饱和度获得的红色像素单元的最小目标灰阶值为R1，则可以设置最小目标灰阶值对应的亮度为RLR1，设置设定伽马值等于红色像素单元对应原始伽马曲线的伽马值为γ，设置最大目标灰阶值为255，则可以设置最大目标灰阶值对应的亮度为RL255。以红色像素单元对应的显示灰阶值组中的显示灰阶值a0为例，其中a0小于255，大于R1，则a0对应的目标灰阶值a1可以等于f(a0，RLR1，γ，RL255)，即a1为显示灰阶值组中的显示灰阶值a0、最小目标灰阶值R1对应的亮度RLR1、最大目标灰阶值255对应的亮度RL255以及红色像素单元对应的原始伽马曲线的伽马值γ的函数，也即a1与显示灰阶值组中的显示灰阶值a0、最小目标灰阶值R1对应的亮度RLR1、最大目标灰阶值255对应的亮度RL255以及红色像素单元对应的原始伽马曲线的伽马值γ均相关。
表2像素单元的显示灰阶值组与目标灰阶值组的对应关系
示例性的，表2为本申请实施例提供的一种显示面板中的像素单元的显示灰阶值组与目标灰阶值组的对应关系。以显示面板中的像素单元对应的显示灰阶值组和目标灰阶值组的比特数均为8比特为例，从表2中可以看出，显示面板的 像素单元对应的显示灰阶值组与目标灰阶值组的灰阶值的个数相等，为了避免低灰阶值导致显示面板中像素单元在大视角情况下色偏严重的问题，将表中的像素单元对应的显示灰阶值组匹配至对应的目标灰阶值组。对于显示灰阶值组中大于最小显示灰阶值，小于最大显示灰阶值的显示灰阶值，可以根据这些显示灰阶值、最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定伽马值得到与像素单元对应的显示灰阶值组中的目标灰阶值。
示例性的，参照表2，蓝色像素单元B和绿色像素单元G与红色像素单元R的目标灰阶值组的获取方式相似，这里不再赘述。
可选的，可以设置目标灰阶值组中的最大目标灰阶值与显示灰阶值组中的最大显示灰阶值相等。由于显示面板中像素单元对应的目标灰阶值组中的最小目标灰阶值R1大于像素单元对应的显示灰阶值组中的最小显示灰阶值0，为了提高显示面板的显示解析度，可以设置像素单元对应的目标灰阶值组中的最大目标灰阶值等于显示灰阶值组中的最大显示灰阶值，这样使得像素单元对应的目标灰阶值组中的最小目标灰阶值与最大目标灰阶值之间的跨度较大，在消除了大视角情况下低灰阶对像素单元色彩饱和度的影响的同时，提高了显示面板的显示解析度。
可选的，目标灰阶值组的比特数可以大于或等于显示灰阶值组的比特数。示例性的，当像素单元对应的显示灰阶值组的比特数为8比特时，可以设置对应的目标灰阶值组的比特数同样为8比特，但是由于根据色调角度值和饱和度得到的最小目标灰阶值大于显示灰阶值组中的最小显示灰阶值，显示灰阶值组与目标灰阶值组的比特数相同必然会导致根据目标灰阶值组驱动的像素单元的解析度低于根据显示灰阶值组驱动的像素单元的解析度，即根据目标灰阶值组驱动显示面板中的像素单元会导致显示面板解析度的降低。
为避免上述根据目标灰阶值组驱动显示面板中的像素单元会导致显示面板解析度降低的问题，可以设置目标灰阶值组的比特数大于显示灰阶值组的比特数。示例性的，当显示灰阶值组的比特数为8比特时，可以设置目标灰阶值组的比特数为10比特，可以示例性地设置红色像素单元的最小目标灰阶值为224，绿色像素单元的最小目标灰阶值为128，蓝色像素单元的最小目标灰阶值为240，设置三种颜色像素单元的最大目标灰阶值均为1020。或者可以示例性的设置目标灰阶值组的比特数为12比特，可以设置红色像素单元的最小目标灰阶值为896，绿色像素单元的最小目标灰阶值为512，蓝色像素单元的最小目标灰阶值为960，设置三种颜色像素单元的最大目标灰阶值均为4080。这样在消除了大视角情况下低灰阶对像素单元色彩饱和度的影响的同时，提高了显示面板的显示解析度。
在步骤S150、根据目标灰阶值组驱动显示面板中的像素单元进行显示。
根据上述步骤得到的显示面板中的像素单元对应的目标灰阶值组驱动显示面板中的像素单元进行显示，由于像素单元对应的目标灰阶值组中的根据色调角度值和饱和度获得的最小目标灰阶值R1大于像素单元对应的显示灰阶值组中的最小显示灰阶值0，删除了显示灰阶值组中的部分低灰阶值，有效避免了大视角情况下低灰阶影响像素单元色彩饱和度导致的像素单元的色偏问题，提高了显示装置的显示效果。
可选的，图2为本申请实施例提供的另一种显示装置的驱动方法的流程示意图，与上述实施例不同的是，该驱动方法还包括步骤S260。
在步骤S260、根据显示灰阶值组中的最小显示灰阶值和目标灰阶值组中的最小目标灰阶值调整背光模块的亮度。其中，调整后的背光模块的亮度与调整前的背光模块的亮度的比值，等于显示灰阶值组中的最小显示灰阶值对应的亮度与目标灰阶值组中的最小目标灰阶值对应的亮度的比值。
可选地，由于显示面板中的像素单元对应的目标灰阶值组中的最小目标灰阶值大于显示灰阶值组中的最小显示灰阶值，以显示面板中的像素单元对应的显示灰阶值组和目标灰阶值组的比特数均为8比特，最小目标灰阶值为R1为例(R1大于0)，即显示面板中的像素单元的最小亮度由原来0灰阶对应的亮度RL0升高为R1灰阶对应的亮度RLR1，这样就需要辅以像素单元对应的背光亮度降低才能维持显示面板中的原白点由255灰阶红色像素单元R、255灰阶蓝色像素单元B和255灰阶绿色像素单元G混色形成。示例性的，可以设定调整前的红色背光模块的亮度为A，调整后的红色背光模块的亮度为A’，则A和A’需要满足以下公式：
即调整后的红色背光模块的亮度A’与调整前的红色背光模块的亮度A的比值，等于显示灰阶值组中的最小显示灰阶值0对应的亮度RL0与目标灰阶值组中的最小目标灰阶值R1对应的亮度的比值RLR1。
同样的，可以设定调整前的绿色背光模块的亮度为C，调整后的绿色背光模块的亮度为C’，则C和C’需要满足以下公式：
即调整后的绿色背光模块的亮度C’与调整前的绿色背光模块的亮度C的比值，等于显示灰阶值组中的最小显示灰阶值0对应的亮度GL0与目标灰阶值组中的最小目标灰阶值G1对应的亮度的比值GLG1。
同样的，可以设定调整前的蓝色背光模块的亮度为D，调整后的蓝色背光模块的亮度为D’，则D和D’需要满足以下公式：
即调整后的蓝色背光模块的亮度D’与调整前的蓝色背光模块的亮度D的比值，等于显示灰阶值组中的最小显示灰阶值0对应的亮度BL0与目标灰阶值组中 的最小目标灰阶值B1对应的亮度的比值BLB1。
可选的，图3为本申请实施例提供的另一种显示装置的驱动方法的流程示意图，该方法同样可以由本申请实施例提供的显示装置来执行。该方法包括步骤S310至S370。
在步骤S310、将显示面板中的像素单元划分为多个区域，每个区域中包括多个像素单元。
可选地，显示面板可以包括多个矩阵排列的像素单元，即包括多行多列像素单元，可以将显示面板中的像素单元划分为多个区域，每个区域中可以包括多行多列像素单元，即每个区域中包括多个像素单元。
在步骤S320、获取区域中的每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量。
可选地，获取划分后每个区域中的每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量，进而可以获取该区域中所有像素单元的第一分量的平均值Ave R’、第二分量的平均值Ave G’和第三分量的平均值Ave B’。
在步骤S330、根据区域中的像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度。
可选地，可以根据区域中的像素单元的的第一分量的平均值Ave R’、第二分量的平均值Ave G’和第三分量的平均值Ave B’获取第二颜色空间的色调角度值H’和饱和度C’。示例性的，H’可以等于f1(Ave R’，Ave G’，Ave B’)，C’可以等于f2(Ave R’，Ave G’，Ave B’)。
在步骤S340、根据色调角度值和饱和度获取该区域中的像素单元的最小目标灰阶值。
示例性的，可以根据色调角度值判定显示面板该区域中的像素单元呈现的 颜色，再判定获取的饱和度所处的范围，判定该区域中的红色像素单元R的最小目标灰阶值为R1，绿色像素单元的最小目标灰阶值为G1，蓝色像素单元的最小目标灰阶值为B1。
在步骤S350、根据区域中像素单元的最小目标灰阶值将该区域中的像素单元对应的显示灰阶值组匹配至该区域中的像素单元对应的目标灰阶值组。
示例性的，同样可以根据该区域中像素单元对应的显示灰阶值组中的最小显示灰阶值匹配至根据色调角度值和饱和度获得的目标灰阶值组中的最小目标灰阶值；将该区域中的像素单元对应的显示灰阶值组中的最大显示灰阶值匹配至目标灰阶值组中的最大目标灰阶值；根据显示灰阶值组中大于最小显示灰阶值，小于最大显示灰阶值的显示灰阶值、最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定的伽马值获取与显示灰阶值组中的显示灰阶值一一对应的目标灰阶值，并将显示灰阶值组中的这些显示灰阶值匹配至目标灰阶值。
在步骤S360、根据区域中的像素单元对应的目标灰阶值组驱动该区域中的像素单元进行显示。
根据上述步骤得到的显示面板中的像素单元对应的目标灰阶值组驱动显示面板该区域中的像素单元进行显示，由于该区域中的像素单元对应的目标灰阶值组中的根据色调角度值和饱和度获得的最小目标灰阶值大于像素单元对应的显示灰阶值组中的最小显示灰阶值，有效避免了大视角情况下低灰阶影响该区域中像素单元色彩饱和度导致的像素单元的色偏问题，提高了显示装置的显示效果。
在步骤S370、根据该区域中的像素单元对应的显示灰阶值组的最小显示灰阶值和该区域中的像素单元对应的最小目标灰阶值调整对应该区域的背光模块 的亮度。
示例性的，图4为本申请实施例提供的一种显示装置的结构示意图，显示装置例如可以是液晶显示装置。如图4所示，显示装置可以包括显示面板以及位于显示面板下方的背光模块15，背光模块15设置为向显示面板提供显示用的光源。显示面板可以包括临近背光模块的阵列基板16，以及位于阵列基板16远离背光模块15一侧的彩膜基板17(仅示出部分区域)。其中，背光模块15可以包括多个红色背光模块151、绿色背光模块152以及蓝色背光模块153，彩膜基板17上则可以对应包括多个像素单元171(图4中示例性地示出了4个像素单元171)，每个像素单元171包括红色像素单元R、绿色像素单元G和蓝色像素单元B。背光模块15发光的光可以通过阵列基板16上的开口区161照射至位于阵列基板16和彩膜基板17之间的液晶层(未示出)上，实现液晶显示面板的正常功能。
示例性的，如图4所示，对应一像素单元形成的区域172可以设置一组红色背光模块151、绿色背光模块152和蓝色背光模块153组成的背光模块区域A，则可以根据区域172中的像素单元对应的显示灰阶值组的最小显示灰阶值和该区域172中的像素单元对应的最小目标灰阶值，调整对应该区域172的背光模块151的亮度。
通过将显示面板中的像素单元划分为多个区域，并通过调节对应像素单元构成的某一区域的背光模块的亮度，实现了对显示装置中背光模块亮度较精准地调节，且维持了显示面板中的原白点可以由255灰阶红色像素单元R、255灰阶蓝色像素单元B和255灰阶绿色像素单元G混色形成。
需要说明的是，本申请实施例示附图只是示例性的表示各元件的大小，并不代表显示面板中各元件的实际尺寸。
图5为本申请实施例提供的一种显示装置的结构示意图。如图5所示，显示 装置包括分量获取模块11、色调饱和度获取模块12、最小目标灰阶获取模块13、匹配模块14、驱动模块15和背光模块(图中未示出)。色调饱和度获取模块12分别与分量获取模块11以及最小目标灰阶获取模块13电连接，匹配模块14分别与设定终止灰阶模块13以及驱动模块15电连接。驱动模块15还与显示面板电连接，背光模块设置与显示面板下方，设置为为显示面板提供光源。分量获取模块11设置为获取显示面板16中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量。色调饱和度获取模块12设置为根据像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度。最小目标灰阶获取模块13设置为根据色调角度值和饱和度获取像素单元的最小目标灰阶值。匹配模块14设置为根据最小目标灰阶值将像素单元对应的显示灰阶值组匹配至目标灰阶值组，其中，显示灰阶值组与目标灰阶值组中的灰阶值个数相等，最小目标灰阶值大于显示灰阶值组中的最小显示灰阶值。驱动模块15设置为根据目标灰阶值组驱动显示面板中的像素单元进行显示。示例性的，显示装置可以是液晶显示装置，其包括阵列基板和彩膜基板，以及位于阵列基板和彩膜基板之间的液晶分子，液晶分子在阵列基板与彩膜基板之间电压的作用下发生偏转，实现液晶显示装置的显示功能。
图6为本申请实施例提供的另一种显示装置的驱动方法的流程示意图。驱动方法可以应用在需要驱动显示装置进行平面显示的场景，可以由本申请实施例提供的显示装置来执行。该方法包括步骤S410至S480。
在步骤S410、获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量。
在步骤S420、根据像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度。
在步骤S430、根据色调角度值和饱和度获取像素单元的最小目标灰阶值。
在步骤S440、将显示灰阶值组中的最小显示灰阶值匹配至最小目标灰阶值。
在步骤S450、根据显示灰阶值组中的显示灰阶值、最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定伽马值，获取与显示灰阶值组中的显示灰阶值一一对应的目标灰阶值组中的目标灰阶值。
在步骤S460、将显示灰阶值组中的灰阶值匹配至对应的目标灰阶值；其中，显示灰阶值组中的显示灰阶值大于最小显示灰阶值，小于最大显示灰阶值。
在步骤S470、将显示灰阶值组中的最大显示灰阶值匹配至最大目标灰阶值；其中，最小目标灰阶值大于显示灰阶值组中的最小显示灰阶值。
在步骤S480、根据目标灰阶值组驱动显示面板中的像素单元进行显示。
本申请实施例提供了通过将像素单元对应的显示灰阶值组匹配至目标灰阶值组，且根据色调角度值和饱和度得到的目标灰阶值组中的最小目标灰阶值大于显示灰阶值组中的最小显示灰阶值，并根据匹配后的目标灰阶值组驱动显示面板中的像素单元进行显示，删除了显示灰阶值组中的部分低灰阶值，有效消除了大视角情况下低灰阶值对像素单元色彩饱和度的影响，优化了显示装置的显示效果。
Claims (20)
- 一种显示装置的驱动方法，所述显示装置包括显示面板，所述显示面板包括多个像素单元，所述显示装置的驱动方法包括：获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量；根据多个像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度；根据所述色调角度值和所述饱和度获取所述像素单元的最小目标灰阶值；根据所述最小目标灰阶值将所述像素单元对应的显示灰阶值组匹配至目标灰阶值组；其中，所述显示灰阶值组与所述目标灰阶值组中的灰阶值个数相等，所述最小目标灰阶值大于所述显示灰阶值组中的最小显示灰阶值；根据所述目标灰阶值组驱动所述显示面板中的所述像素单元进行显示。
- 根据权利要求1所述的驱动方法，其中，所述将所述像素单元对应的显示灰阶值组匹配至目标灰阶值组包括：将所述显示灰阶值组中的最小显示灰阶值匹配至所述最小目标灰阶值；根据所述显示灰阶值组中的显示灰阶值、所述最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定伽马值，获取与所述显示灰阶值组中的显示灰阶值一一对应的目标灰阶值；将所述显示灰阶值组中的显示灰阶值匹配至对应的目标灰阶值，其中，所述显示灰阶值大于所述显示灰阶值组中的最小显示灰阶值，小于所述显示灰阶值组中的最大显示灰阶值；将所述显示灰阶值组中的最大显示灰阶值匹配至所述最大目标灰阶值。
- 根据权利要求1所述的驱动方法，其中，所述目标灰阶值组的比特数大于或等于所述显示灰阶值组的比特数。
- 根据权利要求1所述的驱动方法，还包括：根据所述显示灰阶值组中的最小显示灰阶值和所述最小目标灰阶值调整背光模块的亮度；其中，调整后的背光模块的亮度与调整前的背光模块的亮度的比值，等于所述显示灰阶值组中的最小显示灰阶值对应的亮度与所述最小目标灰阶值对应的亮度的比值。
- 根据权利要求1所述的驱动方法，其中，所述像素单元包括红色像素单元、绿色像素单元和蓝色像素单元；所述根据所述色调角度值和所述饱和度获取所述像素单元的最小目标灰阶值包括：根据所述色调角度值和所述饱和度获取红色像素单元、所述绿色像素单元和所述蓝色像素单元的最小目标灰阶值；所述根据所述最小目标灰阶值将所述像素单元对应的显示灰阶值组匹配至目标灰阶值组包括：根据所述红色像素单元的最小目标灰阶值，将所述红色像素单元对应的显示灰阶值组匹配至所述红色像素单元对应的目标灰阶值组；根据所述绿色像素单元的最小目标灰阶值，将所述绿色像素单元对应的显示灰阶值组匹配至所述绿色像素单元对应的目标灰阶值组；根据所述蓝色像素单元的最小目标灰阶值，将所述蓝色像素单元对应的显示灰阶值组匹配至所述蓝色像素单元对应的目标灰阶值组；所述红色像素单元、所述绿色像素单元和所述蓝色像素单元对应的最小目标灰阶值不同。
- 根据权利要求1所述的驱动方法，其中，所述显示灰阶值组中的最大显示灰阶值与所述目标灰阶值组中的最大目标灰阶值相同。
- 根据权利要求1所述的驱动方法，还包括：将所述显示面板中的所述像素单元划分为多个区域，每个所述区域中包括多个所述像素单元；获取所述区域中的所述像素单元在第一颜色空间中的第一分量、第二分量和第三分量；根据所述区域中的所述像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度；根据所述色调角度值和所述饱和度获取该所述区域中的像素单元的最小目标灰阶值；根据所述区域中像素单元的最小目标灰阶值将该所述区域中的像素单元对应的显示灰阶值组匹配至该所述区域中的像素单元对应的目标灰阶值组；根据所述区域中的像素单元对应的目标灰阶值组驱动该所述区域中的像素单元进行显示。
- 根据权利要求7所述的驱动方法，其中，还包括：根据该所述区域中的像素单元对应的所述显示灰阶值组的最小显示灰阶值和该所述区域中的像素单元对应的所述最小目标灰阶值调整对应该所述区域的背光模块的亮度。
- 根据权利要求7所述的驱动方法，其中，所述第一颜色空间是红-绿-蓝颜色空间，则第一分量可以为红色分量，第二分量可以为绿色分量，第三分量可以为蓝色分量。
- 根据权利要求1所述的驱动方法，其中，像素单元包括红色像素单元、绿色像素单元和蓝色像素单元，根据红色像素单元的最小目标灰阶值，将红色像素单元对应的显示灰阶值组匹配至红色像素单元对应的目标灰阶值组；根据 绿色像素单元的最小目标灰阶值，将绿色像素单元对应的显示灰阶值组匹配至绿色像素单元对应的目标灰阶值组；根据蓝色像素单元的最小目标灰阶值，将蓝色像素单元对应的显示灰阶值组匹配至蓝色像素单元对应的目标灰阶值组。
- 根据权利要求1所述的驱动方法，其中，所述第二颜色空间为亮度-饱和度-色调角度值颜色空间。
- 一种显示装置，包括：显示面板，设置有多个像素单元；分量获取模块，设置为获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量；色调饱和度获取模块，与所述分量获取模块连接，设置为根据多个像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度；最小目标灰阶获取模块，与所述色调饱和度模块电连接，设置为根据所述色调角度值和所述饱和度获取所述像素单元的最小目标灰阶值；匹配模块，与所述最小目标灰阶获取模块电连接，设置为根据所述最小目标灰阶值将所述像素单元对应的显示灰阶值组匹配至目标灰阶值组，其中，所述显示灰阶值组与所述目标灰阶值组中的灰阶值个数相等，所述最小目标灰阶值大于所述显示灰阶值组中的最小显示灰阶值；驱动模块，与所述匹配模块和显示面板电连接，设置为根据所述目标灰阶值组驱动所述显示面板中的所述像素单元进行显示；背光模块，设置于所述显示面板下方，设置为所述显示面板提供光源。
- 根据权利要求12所述的显示装置，其中，在根据所述最小目标灰阶值将所述像素单元对应的显示灰阶值组匹配至目标灰阶值组时，所述匹配模块设 置为：将所述显示灰阶值组中的最小显示灰阶值匹配至所述最小目标灰阶值；根据所述显示灰阶值组中的显示灰阶值、所述最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定伽马值，获取与所述显示灰阶值组中的显示灰阶值一一对应的目标灰阶值；将所述显示灰阶值组中的显示灰阶值匹配至对应的目标灰阶值；其中，所述显示灰阶值大于所述显示灰阶值组中的最小显示灰阶值，小于所述显示灰阶值组中的最大显示灰阶值；以及将所述显示灰阶值组中的最大显示灰阶值匹配至所述最大目标灰阶值。
- 根据权利要求12所述的显示装置，其中，所述目标灰阶值组的比特数大于或等于所述显示灰阶值组的比特数。
- 根据权利要求12所述的显示装置，其中，所述显示装置还设置为：根据所述显示灰阶值组中的最小显示灰阶值和所述最小目标灰阶值调整背光模块的亮度，其中，调整后的背光模块的亮度与调整前的背光模块的亮度的比值，等于所述显示灰阶值组中的最小显示灰阶值对应的亮度与所述最小目标灰阶值对应的亮度的比值。
- 根据权利要求12所述的显示装置，其中，所述像素单元包括红色像素单元、绿色像素单元和蓝色像素单元；所述最小目标灰阶获取模块设置为：根据所述色调角度值和所述饱和度获取红色像素单元、所述绿色像素单元和所述蓝色像素单元的最小目标灰阶值；根据所述红色像素单元的最小目标灰阶值，将所述红色像素单元对应的显示灰阶值组匹配至所述红色像素单元对应的目标灰阶值组；根据所述绿色像素单元的最小目标灰阶值，将所述绿色像素单元对应的显示灰阶值组匹配至所述 绿色像素单元对应的目标灰阶值组；根据所述蓝色像素单元的最小目标灰阶值，将所述蓝色像素单元对应的显示灰阶值组匹配至所述蓝色像素单元对应的目标灰阶值组；所述红色像素单元、所述绿色像素单元和所述蓝色像素单元对应的最小目标灰阶值不同。
- 根据权利要求12所述的显示装置，其中，所述显示灰阶值组中的最大显示灰阶值与所述目标灰阶值组中的最大目标灰阶值相同。
- 根据权利要求12所述的显示装置，其中，所述显示装置还设置为：将所述显示面板中的所述像素单元划分为多个区域，每个所述区域中包括多个所述像素单元；获取所述区域中的所述像素单元在第一颜色空间中的第一分量、第二分量和第三分量；根据所述区域中的所述像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度；根据所述色调角度值和所述饱和度获取该所述区域中的像素单元的最小目标灰阶值；根据所述区域中像素单元的最小目标灰阶值将该所述区域中的像素单元对应的显示灰阶值组匹配至该所述区域中的像素单元对应的目标灰阶值组；以及根据所述区域中的像素单元对应的目标灰阶值组驱动该所述区域中的像素单元进行显示。
- 根据权利要求18所述的显示装置，其中，所述显示装置还设置为根据该所述区域中的像素单元对应的所述显示灰阶值组的最小显示灰阶值和该所述区域中的像素单元对应的所述最小目标灰阶值调整对应该所述区域的背光模块 的亮度。
- 一种包括多个像素单元的显示面板的驱动方法，包括：获取显示面板中每个像素单元在第一颜色空间中的第一分量、第二分量和第三分量；根据多个像素单元的第一分量的平均值、第二分量的平均值和第三分量的平均值获取第二颜色空间中的色调角度值和饱和度；根据所述色调角度值和所述饱和度获取所述像素单元的最小目标灰阶值；将所述显示灰阶值组中的最小显示灰阶值匹配至所述最小目标灰阶值；根据所述显示灰阶值组中的显示灰阶值、所述最小目标灰阶值对应的亮度、最大目标灰阶值对应的亮度以及设定伽马值，获取与所述显示灰阶值组中的显示灰阶值一一对应的目标灰阶值；将所述显示灰阶值组中的灰阶值匹配至对应的目标灰阶值，其中，所述显示灰阶值大于所述显示灰阶值组中的最小显示灰阶值，小于所述显示灰阶值组中的最大显示灰阶值；将所述显示灰阶值组中的最大显示灰阶值匹配至所述最大目标灰阶值，其中，所述最大目标灰阶值大于所述显示灰阶值组中的最大显示灰阶值；以及根据所述目标灰阶值组驱动所述显示面板中的所述像素单元进行显示。
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