WO2018113189A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2018113189A1
WO2018113189A1 PCT/CN2017/086130 CN2017086130W WO2018113189A1 WO 2018113189 A1 WO2018113189 A1 WO 2018113189A1 CN 2017086130 W CN2017086130 W CN 2017086130W WO 2018113189 A1 WO2018113189 A1 WO 2018113189A1
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Prior art keywords
pixels
pixel
pixel group
driving voltage
hue
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PCT/CN2017/086130
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English (en)
French (fr)
Inventor
陈猷仁
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惠科股份有限公司
重庆惠科金渝光电科技有限公司
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Priority to US15/743,964 priority Critical patent/US10580369B2/en
Publication of WO2018113189A1 publication Critical patent/WO2018113189A1/zh

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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
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
    • G09G2300/0447—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
    • 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
    • G09G3/3406—Control of illumination source

Definitions

  • the present application relates to the field of liquid crystal display technology, and in particular, to a display device and a driving method thereof.
  • VA liquid crystal or IPS liquid crystal technology Conventional large-size display devices mostly use negative VA liquid crystal or IPS liquid crystal technology.
  • the VA type liquid crystal drive rapidly saturates the driving voltage with a large viewing angle, which leads to a serious visual role, which in turn affects the image quality. Since the brightness of the blue sub-pixels of the side view increases with the voltage, the trend of brightness saturation is more significant and faster than that of the red sub-pixels and the green sub-pixels, so that the color-viewing view quality will exhibit a blue-biased defect.
  • a display device and a driving method thereof which are capable of improving the disadvantage of a visual character bias.
  • a driving method of a display device comprising:
  • the lookup table is a correspondence table between a color grayscale value of the blue subpixel and a driving voltage pair;
  • the driving voltage pair includes a driving voltage of a high level and a low level;
  • the blue sub-pixels on the corresponding pixel group are driven according to the driving voltage pair.
  • each of the pixel groups includes an even number of pixels that are sequentially laterally adjacent or vertically adjacent.
  • the step of determining the display hue of each pixel group according to the picture input signal comprises:
  • the display hue of each pixel group is determined according to the average grayscale value of each color sub-pixel in each pixel group in the picture input signal.
  • the step of determining the display hue of each pixel group according to the picture input signal further includes the step of determining the color purity of each pixel group according to the picture input signal;
  • the step of acquiring the lookup table according to the hue range to which the display hue belongs is to obtain a corresponding lookup table according to the range in which the display hue and the color purity of each pixel group belong.
  • the method further includes the step of pre-storing the correspondence between the respective hue ranges and the lookup table and the lookup table.
  • the step of driving the blue sub-pixels on the corresponding pixel group according to the driving voltage pair comprises:
  • the driving voltage is separately driven for the blue sub-pixels of the two pixel units.
  • controlling the driving voltage of the blue sub-pixels in the adjacent two pixel units is One high and one low.
  • each pixel group includes two lateral or longitudinally adjacent blue sub-pixels; and the step of driving the blue sub-pixels on the corresponding pixel group according to the driving voltage The two blue sub-pixels on the corresponding pixel group are performed according to the driving voltage pair. Drive separately.
  • a display device comprising:
  • the pixels on the display panel are divided into a plurality of pixel groups; each pixel group includes an even number of sequentially adjacent pixels;
  • a backlight module configured to provide backlight to the display panel
  • control component comprising a memory and at least one processor; the memory storing computer executable instructions executable by the at least one processor, the computer executable instructions being executed by the at least one processor And causing the at least one processor to perform the steps in the following units:
  • a calculating unit configured to determine a display hue of each pixel group according to a picture input signal
  • An obtaining unit configured to acquire a lookup table according to a hue range to which the display hue belongs;
  • the lookup table is a correspondence table between a color grayscale value of a blue subpixel and a driving voltage pair; and the driving voltage pair includes a high one Low drive voltage;
  • the acquiring unit further sets a driving voltage pair obtained by using a corresponding lookup table according to an average grayscale value of the blue subpixel in each pixel group;
  • Driving components are respectively connected to the control component and the display panel; the driving component is configured to drive the blue sub-pixels on the corresponding pixel groups according to the driving voltage pair.
  • each pixel group on the display panel includes an even number of pixels that are sequentially laterally adjacent or vertically adjacent.
  • the calculating unit is further configured to calculate an average grayscale value of each color sub-pixel in each pixel group according to the picture input signal, and according to the average of the color sub-pixels in the picture input signal.
  • the grayscale value finds the display hue of each pixel group.
  • the calculating unit is further configured to determine a color purity of each pixel group according to the picture input signal; the obtaining unit is configured to display a range according to a color hue and a color purity of each pixel group. Get the corresponding lookup table.
  • a memory is further included; the memory is configured to store a correspondence between each hue range and a lookup table and the lookup table.
  • each pixel group on the display panel is divided into two adjacent pixel units; the driving component is configured to pair blue sub-pixels of the two pixel units according to the driving voltage The pixels are driven separately.
  • controlling the driving voltage of the blue sub-pixels in the adjacent two pixel units is One high and one low.
  • each of the pixel groups includes two lateral or longitudinally adjacent blue sub-pixels; the driving component is configured to pair two blues on the corresponding pixel group according to the driving voltage The sub-pixels are driven separately.
  • the display panel is a flat display panel or a curved display panel.
  • a display device comprising:
  • each pixel group includes an even number of sequentially adjacent horizontally or vertically adjacent pixels; each pixel group is divided into two adjacent pixel units ;
  • a backlight module configured to provide backlight to the display panel
  • control component comprising a memory and at least one processor; the memory storing computer executable instructions executable by the at least one processor, the computer executable instructions being executed by the at least one processor And causing the at least one processor to perform the steps in the following units:
  • a calculating unit configured to calculate an average grayscale value of each color sub-pixel in each pixel group according to the picture input signal, and find each pixel group according to an average grayscale value of each color sub-pixel in the picture input signal Displaying a hue; the computing unit is further configured to determine a color purity of each pixel group according to the picture input signal;
  • An obtaining unit configured to obtain a lookup table according to a range to which the display hue and the color purity belong;
  • the lookup table is a correspondence table between a color grayscale value of the blue subpixel and a driving voltage pair;
  • the driving voltage pair includes one High and low driving voltage;
  • the obtaining unit is further configured to: according to an average grayscale value of the blue sub-pixel in each pixel group Acquiring a drive voltage pair using a corresponding lookup table;
  • Driving components are respectively connected to the control component and the display panel; the driving component is configured to respectively drive blue sub-pixels of two pixel units on the corresponding pixel group according to the driving voltage.
  • controlling the driving voltage of the blue sub-pixels in the adjacent two pixel units is One high and one low.
  • the display device and the driving method thereof are driven by selecting a corresponding pair of driving voltages having a high level and a low level according to a range to which the display hue of each pixel group on the display panel belongs.
  • the brightness variation of the blue sub-pixels in the side view can be controlled, so that the saturation trend of the blue sub-pixels is close to the red sub-pixels and the blue sub-pixels or the same
  • the brightness saturation curves of the lower red sub-pixel, the green sub-pixel, and the blue sub-pixel are close to each other to reduce the defect of the apparent role.
  • FIG. 1 is a flow chart showing a driving method of a display device in an embodiment
  • FIG. 2 to FIG. 5 are schematic diagrams of pixel division on a display panel in different embodiments
  • FIG. 6 is a schematic diagram of a CIE LCH color space system adopted in step S120 of FIG. 1;
  • FIG. 7 is a comparison diagram of brightness versus gray scale change curves of a blue sub-pixel at a positive viewing angle and a side viewing angle when driving with a single driving voltage;
  • Figure 8 shows the drive with high drive voltage, low drive voltage, high and low drive voltage pairs respectively.
  • the brightness of the blue sub-pixels in the side viewing angle varies with the gray scale
  • 9 and 10 are schematic diagrams of driving after S150 is executed.
  • Figure 11 is a comparison of the brightness of the ideal brightness with the gray level and the brightness of each of the two voltage combinations as a function of gray scale;
  • Figure 14 is a block diagram showing the structure of a display device in an embodiment
  • Figure 15 is a block diagram showing the structure of a control unit in an embodiment.
  • the driving method of the display device can improve the color shift (or chromatic aberration) defect caused by the refractive index mismatch of the liquid crystal large viewing angle.
  • the display device may be an LCD display device, an OLED display device, a QLED display device, etc., and the display device may also be a flat display device or a curved display device. It will be understood that the types of display devices include, but are not limited to, the above examples.
  • the display device is an LCD display device, it may be an LCD display device such as a TN, OCB or VA type.
  • the display device can use a direct backlight, and the backlight can be white light, RGB three-color light source, RGBW four-color light source or RGBY four-color light source, but is not limited thereto.
  • the driving method includes the following steps:
  • step S110 the pixels on the display panel are divided into a plurality of pixel groups.
  • each pixel group includes an even number of sequentially adjacent pixels.
  • an even number of pixels may be laterally adjacent or longitudinally adjacent.
  • 2 is a schematic diagram of pixel division in an embodiment.
  • each pixel group 90 includes four horizontally adjacent pixels, and each pixel includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B that are sequentially disposed adjacent to each other, that is, each Pixel group The 90 includes four blue sub-pixels. And, four laterally adjacent pixels are further divided into two adjacent pixel units 92 and 94.
  • FIG. 3 is a schematic diagram of pixel division in another embodiment. In the present embodiment, each pixel group 90 includes four vertically adjacent pixels, that is, it includes four blue sub-pixels.
  • each pixel group 90 includes two laterally adjacent pixels.
  • each pixel group 90 includes two vertically adjacent pixels, as shown in FIG. It can be understood that the pixel dividing method on the display panel includes, but is not limited to, this.
  • step S120 the display hue of each pixel group is obtained according to the picture input signal.
  • L represents brightness
  • C color purity
  • H represents a display hue, that is, a color representation.
  • the above functional relationship can be known according to the CIE specification.
  • the CIE LCH color space system is shown in Figure 6. Only the positional representations of the main colors representing colors such as red, yellow, green and blue are given in Fig. 6, and the positional indications of the other colors are not given.
  • CIE LCH color space system is a color space system well known to those skilled in the art, only the case of the complete CIE LCH color space system can be known to those skilled in the art in FIG. 6.
  • CIE LCH color space system 0 to 360 degrees are used to represent different hue colors. Where 0° is defined as red, 90° is yellow, 180° is green, and 270° is blue.
  • the display hue H of each pixel group can be calculated and obtained by the average driving voltage of the pixel group.
  • each pixel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Therefore, the average grayscale values R'n, G'n, B'n of the current color sub-pixels of each pixel group are first obtained.
  • R'n Average(R 1 +R 2 +...+R m );
  • G'n Average(G 1 +G 2 +...+G m );
  • B'n Average (B 1 + B 2 + ... + B m ).
  • n denotes the sequence number of the divided pixel group
  • m denotes the sequential number of the same color sub-pixel in the pixel group n of each of the red sub-pixel, the green sub-pixel and the blue sub-pixel.
  • n represents the sequential number of the same color sub-pixels of the red sub-pixel, the green sub-pixel, and the blue sub-pixel on the entire display panel.
  • H f3 (R'n, G'n, B'n).
  • the color purity C of each pixel group is also determined according to the average gray scale value described above.
  • the range of color purity C is expressed in the range of 0 to 100, with 100 representing the most vivid color.
  • the value of the color purity C represents a voltage signal at the time of display driving of the display device to a certain extent.
  • Step S130 Acquire a lookup table according to the hue range to which the display hue belongs.
  • the hue value is previously divided into a plurality of range regions before determining the hue range to which the display hue of each pixel group belongs. Each range area can be determined based on the degree of color shift that needs to be improved.
  • the hue value is divided into six regions: the first region, 0° ⁇ H ⁇ 45° and 315° ⁇ H ⁇ 360°; the second region, 45° ⁇ H ⁇ 135°; the third region , 135 ° ⁇ H ⁇ 205 °; fourth zone, 205 ° ⁇ H ⁇ 245 °; fifth zone, 245 ° ⁇ H ⁇ 295 °; and sixth zone, 295 ° ⁇ H ⁇ 315 °. Therefore, the range to which it belongs can be determined based on the display hue of each pixel group obtained. It can be understood that the division of the display hue value can be divided according to actual needs, and is not limited thereto.
  • the lookup table is a correspondence table of the color grayscale values of the blue sub-pixels and the driving voltage pairs.
  • the driving voltage pair includes a high-low driving voltage, that is, a high driving voltage B'H and a low driving voltage B'L.
  • the color grayscale values 0 to 255 of the blue sub-pixels in the lookup table correspond to 256 pairs of high and low driving voltage signals.
  • Each set of high and low drive voltages enables the adjusted blue sub-pixels to be viewed from the side
  • the brightness is more closely related to the gray level curve as the gray level changes with the gray scale curve.
  • the brightness variation of the blue sub-pixels in the side view can be controlled, so that the saturation trend of the blue sub-pixels is close to the red sub-pixels and the blue sub-pixels or the same
  • the brightness saturation curves of the lower red sub-pixel, the green sub-pixel, and the blue sub-pixel are close to each other to reduce the defect of the apparent role.
  • 7 is a graph showing the luminance as a grayscale value in a front view and a side viewing angle when a blue subpixel adopts a single driving voltage, wherein L71 represents a curve in front view and L72 represents a curve in side view.
  • FIG. 8 is a schematic diagram showing a comparison of luminance changes in a side view using a high and low driving voltage pair driving and a high voltage driving and a low voltage driving, respectively.
  • L81 is the gray-scale curve seen from the side angle of view when driving with high voltage
  • L82 is the curve of the brightness of the low-drive voltage seen with the side view
  • L83 is mixed with L81 and L82. That is to say, the brightness of the high-low driving voltage is changed with the gray-scale curve. It is obviously closer to the brightness under the front view with the gray-scale curve L84, that is, the high-low driving voltage pair can improve the visual role.
  • the correspondence table is stored in advance.
  • the first area corresponds to the first lookup table
  • the second area corresponds to the second lookup table
  • the third area corresponds to the third lookup table
  • the correspondence table and the lookup table may be stored in one memory at the same time, or may be separately stored.
  • the memory may be a storage device in the display device, or may be directly stored by using an external storage device, and may be acquired externally if necessary. Therefore, the corresponding lookup table can be determined according to the obtained hue range of each pixel group.
  • the lookup table needs to be acquired simultaneously based on the range to which the hue and color purity are displayed.
  • different hue ranges have different color purity settings.
  • the range setting of the color purity corresponding to different zones can also be determined according to the degree of color shift which is actually required to be improved.
  • the first region of the hue range corresponds to the first color purity range C TL1 ⁇ C ⁇ C TH1 ;
  • the second region of the hue range corresponds to the second color purity range C TL2 ⁇ C ⁇ C TH2 ;
  • the third region of the hue range corresponds to the third color purity Range C TL3 ⁇ C ⁇ C TH3 ; and so on. Therefore, the range to which it belongs can be determined based on the obtained display hue and color purity. Taking the embodiment as an example, when both the display hue H and the color purity C satisfy the following two conditions, it can be determined that it belongs to the first range:
  • the corresponding lookup table can be obtained according to the range in which the hue and the color purity are displayed.
  • Step S140 Acquire a driving voltage pair by using a corresponding lookup table according to an average grayscale value of the blue subpixel in each pixel group.
  • Different display hue and color purity ranges correspond to different lookup tables, so that the finally obtained driving voltage pair is closer to the ideal driving voltage, so that the brightness variation of the adjusted blue sub-pixel is closer to the ideal condition.
  • Step S150 driving the blue sub-pixels on the corresponding pixel groups according to the driving voltage pair.
  • the driving voltage pair is used to drive the two pixel units separately.
  • the high driving voltage drives one of the pixel units, and the low driving voltage drives the other pixel unit, thereby realizing the high and low voltage phase-to-phase driving of the adjacent blue sub-pixels, as shown in FIGS. 9 and 10.
  • the driving of other sub-pixels such as a red sub-pixel or a green sub-pixel may be driven according to a common driving method.
  • the driving method of the display device described above selects a corresponding driving voltage pair having a high level and a low level according to a range to which the display hue of each pixel group on the display panel belongs.
  • Target gamma is the target blue pixel brightness as a function of gray scale, corresponding to L13 in the figure.
  • the division through the blue sub-pixel must be satisfied that the RGB luminance ratio does not change.
  • the high-voltage and low-voltage combination of the gamma1 and gamma2 sides of the blue sub-pixel spatial division are saturated with the gray-scale change, respectively corresponding to L12 and L11 in the figure.
  • 12 and 13 are partial enlarged views of Fig. 11.
  • a set of high and low voltage pairs are used to drive the blue sub-pixels on the display panel, and the brightness of the gray-scale conversion curve is much faster than that of the target gamma, so that it cannot It is a good solution to the side view role bias problem. That is, the high voltage and low voltage combination of only one blue sub-pixel spatial division cannot simultaneously satisfy the requirement that the high and low voltage luminances are close to the target luminance.
  • the difference d1(n) between the actual brightness of the gamma1 and the target brightness is much larger than the difference between the actual brightness of the gamma2 and the target brightness.
  • D2(n) when considering the relationship between the high voltage (that is, the high gray level value) and the brightness change, the difference d1(n) between the actual brightness of the gamma1 and the target brightness is much smaller than the difference d2(n) of the actual brightness of the gamma2.
  • gamma1 is suitable when the blue sub-pixel higher voltage signal (that is, the high gray level value) is present on the image quality content.
  • gamma2 is suitable when the blue sub-pixel lower voltage signal (ie, the low gray level value) is present on the image quality content.
  • different high and low voltage combinations are selected for driving different average gray scale values, so that the above problem can be well overcome.
  • the pixels on the display panel need not be designed as primary and secondary pixels, thereby greatly improving the transmittance and resolution of the TFT display panel. Reduced backlight design costs.
  • the application also provides a display device as shown in FIG.
  • the display device can perform the above driving method.
  • the display device includes a backlight module 410, a display panel 420, a control unit 430, and a driving unit 440. Both the control component 430 and the driving component 440 can be integrated on the display panel 420, and the backlight module 410 can be directly implemented by using a separate backlight module. It will be understood that the manner in which the components are integrated is not limited thereto.
  • the backlight module 410 is configured to provide backlighting.
  • the backlight module 410 can be a direct type backlight or a side backlight.
  • the backlight may be a white light, an RGB three-color light source, an RGBW four-color light source, or an RGBY four-color light source, but is not limited thereto.
  • the display panel 420 can be a display panel such as an LCD display panel, an OLED display panel, or a QLED display panel, and the display panel 420 can also be a flat display panel or a curved display panel. It can be understood that the types of display panels 420 include, but are not limited to, the above examples.
  • the display panel 420 is an LCD display panel, it may be an LCD display panel such as a TN, OCB or VA type.
  • the pixels on the display panel 420 are divided into a plurality of pixel groups. Each pixel group includes an even number of sequentially adjacent pixels. The division method can refer to FIGS. 2 to 5, but is not limited thereto.
  • Control component 430 includes a memory and at least one processor. Storing, in the memory, computer executable instructions executable by the at least one processor, the computer executable instructions being executed by the at least one processor, such that the at least one processor executes the following in the computing unit 432 and the obtaining unit 434 The steps are as shown in FIG.
  • the calculation unit 432 is configured to determine the display hue of each pixel group according to the picture input signal.
  • the acquisition unit 434 is arranged to acquire a lookup table according to the hue range to which the display hue belongs.
  • the lookup table is a correspondence table of the color grayscale values of the blue sub-pixels and the driving voltage pairs.
  • the driving voltage pair includes a high-low driving voltage.
  • the obtaining unit 434 is further configured to acquire a driving voltage pair using a corresponding lookup table according to an average grayscale value of the blue subpixels in each of the pixel groups.
  • the computing unit 432 is further configured to determine the color purity of each pixel group based on the picture input signal.
  • the acquisition unit 434 is also arranged to obtain a corresponding pair of drive voltages according to the display hue and color purity of each pixel group.
  • the drive unit 440 is connected to the control unit 430 and the display panel 420, respectively.
  • Drive component 440 It is arranged to drive the blue sub-pixels on the corresponding pixel groups according to the driving voltage pair.
  • the display device selects a corresponding driving voltage pair having a high level and a low level according to a range to which the display hue of each pixel group on the display panel 420 belongs.
  • the brightness variation of the blue sub-pixels in the side view can be controlled, so that the saturation trend of the blue sub-pixels is close to the red sub-pixels and the blue sub-pixels or the same
  • the brightness saturation curves of the lower red sub-pixel, the green sub-pixel, and the blue sub-pixel are close to each other to reduce the defect of the apparent role.
  • the display device may be an LCD display device, an OLED display device, a QLED display device, etc., and the display device may also be a flat display device or a curved display device.
  • the display device is not an LCD display device, the display device The backlight module 410 may not be included.
  • the storage medium may be a non-volatile storage medium such as a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

一种显示装置的驱动方法，包括：将显示面板上的像素划分为多个像素组，每个像素组包括偶数个依次相邻的像素（S110）；根据画面输入信号求取每个像素组的显示色相（S120）；根据显示色相所属的色相范围获取查找表，查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表，驱动电压对包括一高一低的驱动电压（S130）；根据每个像素组中的蓝色子像素的平均灰阶值利用对应的查找表获取驱动电压对（S140）；以及根据驱动电压对对相应的像素组上的蓝色子像素进行驱动（S150）。

Description

显示装置及其驱动方法
本申请要求于2016年12月20日提交中国专利局、申请号为201611187840.9、申请名称为“液晶显示器件及其驱动方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及液晶显示技术领域，特别是涉及一种显示装置及其驱动方法。
背景技术
传统的大尺寸显示装置多采用负型VA液晶或者IPS液晶技术。VA型液晶驱动在大视角下亮度随驱动电压快速饱和，从而导致视角色偏较为严重，进而影响画质品质。由于侧视角蓝色子像素的亮度随电压增加，亮度饱和的趋势比红色子像素、绿色子像素来的显著及快速，使得混色视角观察画质会呈现偏蓝色偏的明显缺陷。
发明内容
根据本申请的各种实施例，提供一种显示装置及其驱动方法，能够改善视角色偏的缺点。
一种显示装置的驱动方法，包括：
将显示面板上的像素划分为多个像素组；每个像素组包括偶数个依次相邻的像素；
根据画面输入信号求取每个像素组的显示色相；
根据所述显示色相所属的色相范围获取查找表；所述查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表；所述驱动电压对包括一高一低的驱动电压；
根据每个像素组中的蓝色子像素的平均灰阶值利用对应的查找表获取驱 动电压对；以及
根据所述驱动电压对对相应的像素组上的蓝色子像素进行驱动。
在其中一个实施例中，所述将显示面板上的像素划分为多个像素组的步骤中，每个像素组包括偶数个依次横向相邻或者纵向相邻的像素。
在其中一个实施例中，所述根据画面输入信号求取每个像素组的显示色相的步骤包括：
根据画面输入信号计算每个像素组中各种颜色子像素的平均灰阶值；以及
根据画面输入信号中的每个像素组中各种颜色子像素的平均灰阶值求每个像素组的显示色相。
在其中一个实施例中，所述根据画面输入信号求取每个像素组的显示色相的步骤中，还包括根据所述画面输入信号求取每个像素组的色彩纯度的步骤；
所述根据所述显示色相所属的色相范围获取查找表的步骤为，根据每个像素组的显示色相和色彩纯度所属的范围获取对应的查找表。
在其中一个实施例中，还包括预先存储各色相范围与查找表的对应关系和所述查找表的步骤。
在其中一个实施例中，所述根据所述驱动电压对对相应的像素组上的蓝色子像素进行驱动的步骤包括：
将每个像素组划分为两个相邻的像素单元；以及
将所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动。
在其中一个实施例中，所述将所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动的步骤中，控制相邻两个像素单元中的蓝色子像素的驱动电压为一高一低。
在其中一个实施例中，每个像素组中均包括两个横向或者纵向相邻的蓝色子像素；所述根据所述驱动电压对对相应的像素组上的蓝色子像素进行驱动的步骤为，根据所述驱动电压对对相应的像素组上的两个蓝色子像素进行 分别驱动。
一种显示装置，包括：
显示面板，所述显示面板上的像素被划分为多个像素组；每个像素组包括偶数个依次相邻的像素；
背光模组，设置为向所述显示面板提供背光；
控制部件，所述控制部件包括存储器和至少一个处理器；所述存储器中存储有可被所述至少一个处理器执行的计算机可执行指令，所述计算机可执行指令被所述至少一个处理器执行时，使得所述至少一个处理器执行以下单元中的步骤：
计算单元，设置为根据画面输入信号求取每个像素组的显示色相；和
获取单元，设置为根据所述显示色相所属的色相范围获取查找表；所述查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表；所述驱动电压对包括一高一低的驱动电压；
所述获取单元还设置根据每个像素组中的蓝色子像素的平均灰阶值利用对应的查找表获取驱动电压对；以及
驱动部件，分别与所述控制部件和所述显示面板连接；所述驱动部件设置为根据所述驱动电压对对相应的像素组上的蓝色子像素进行驱动。
在其中一个实施例中，所述显示面板上的每个像素组包括偶数个依次横向相邻或者纵向相邻的像素。
在其中一个实施例中，所述计算单元还设置为根据画面输入信号计算每个像素组中各种颜色子像素的平均灰阶值，并根据所述画面输入信号中各种颜色子像素的平均灰阶值求每个像素组的显示色相。
在其中一个实施例中，所述计算单元还设置为根据所述画面输入信号求取每个像素组的色彩纯度；所述获取单元设置为根据每个像素组的显示色相和色彩纯度所属的范围获取对应的查找表。
在其中一个实施例中，还包括存储器；所述存储器设置为存储各色相范围与查找表的对应关系和所述查找表。
在其中一个实施例中，所述显示面板上的每个像素组被划分为两个相邻的像素单元；所述驱动部件设置为根据所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动。
在其中一个实施例中，所述驱动部件根据所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动时，控制相邻两个像素单元中的蓝色子像素的驱动电压为一高一低。
在其中一个实施例中，每个像素组中均包括两个横向或者纵向相邻的蓝色子像素；所述驱动部件设置为根据所述驱动电压对对相应的像素组上的两个蓝色子像素进行分别驱动。
在其中一个实施例中，所述显示面板为平面显示面板或者曲面显示面板。
一种显示装置，包括：
显示面板，所述显示面板上的像素被划分为多个像素组；每个像素组包括偶数个依次横向相邻或者纵向相邻的像素；每个像素组被划分为两个相邻的像素单元；
背光模组，设置为向所述显示面板提供背光；
控制部件，所述控制部件包括存储器和至少一个处理器；所述存储器中存储有可被所述至少一个处理器执行的计算机可执行指令，所述计算机可执行指令被所述至少一个处理器执行时，使得所述至少一个处理器执行以下单元中的步骤：：
计算单元，设置为根据画面输入信号计算每个像素组中各种颜色子像素的平均灰阶值，并根据所述画面输入信号中各种颜色子像素的平均灰阶值求每个像素组的显示色相；所述计算单元还设置为根据所述画面输入信号求取每个像素组的色彩纯度；和
获取单元，设置为根据所述显示色相和色彩纯度所属的范围获取查找表；所述查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表；所述驱动电压对包括一高一低的驱动电压；
所述获取单元还设置为根据每个像素组中的蓝色子像素的平均灰阶值 利用对应的查找表获取驱动电压对；以及
驱动部件，分别与所述控制部件和所述显示面板连接；所述驱动部件设置为根据所述驱动电压对对相应的像素组上的两个像素单元中的蓝色子像素进行分别驱动。
在其中一个实施例中，所述驱动部件根据所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动时，控制相邻两个像素单元中的蓝色子像素的驱动电压为一高一低。
上述显示装置及其驱动方法，根据显示面板上每个像素组的显示色相所属的范围选择相应的具有一高一低的驱动电压对来进行驱动。通过高低电压驱动每个像素组中的蓝色子像素，可以使得侧视角下蓝色子像素的亮度变化得到控制，使得蓝色子像素的饱和趋势接近红色子像素和蓝色子像素或者同正视下红色子像素、绿色子像素和蓝色子像素的亮度饱和曲线趋势接近，来减少视角色偏的缺陷。同时，通过形成多组驱动电压对以对蓝色子像素进行驱动，可以确保补偿后的画面亮度与目标亮度贴近，有效改善大视角蓝色子像素过早饱和造成色偏的缺陷。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅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实施例的附图。
图1为一实施例中的显示装置的驱动方法的流程图；
图2～图5为不同实施例中的显示面板上的像素划分示意图；
图6为图1中的步骤S120采用的CIE LCH颜色空间系统的示意图；
图7为采用单一驱动电压进行驱动时蓝色子像素在正视角和侧视角下的亮度随灰阶变化曲线对比图；
图8为分别采用高驱动电压、低驱动电压、高低驱动电压对进行驱动时 蓝色子像素在侧视角下的亮度随灰阶变化曲线；
图9和图10为执行S150后的驱动示意图；
图11为理想亮度随灰阶的变化曲线与两种电压组合各自的亮度随灰阶变化曲线的对比图；
图12和图13为图11的局部放大图；
图14为一实施例中的显示装置的结构框图；
图15为一实施例中的控制部件的结构框图。
具体实施方式
为了便于理解本申请，下面将参照相关附图对本申请进行更全面的描述。附图中给出了本申请的较佳实施例。但是，本申请可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本申请的公开内容的理解更加透彻全面。
图1为一实施例中的显示装置的驱动方法的流程图。该显示装置的驱动方法可以改善液晶大视角折射率不匹配造成的色偏(或者色差)缺点。该显示装置可以为LCD显示装置、OLED显示装置、QLED显示装置等，同时显示装置也可以为平面显示装置或者曲面显示装置中。可以理解，显示装置的种类包括但并不限于上述示例。当显示装置为LCD显示装置时，其可以为TN、OCB或者VA型等LCD显示装置。该显示装置可以运用直下背光，背光源可以为白光、RGB三色光源、RGBW四色光源或者RGBY四色光源，但并不限于此。
参见图1，该驱动方法包括以下步骤：
步骤S110，将显示面板上的像素划分为多个像素组。
划分后，每个像素组包括偶数个依次相邻的像素。具体地，偶数个像素可以为横向相邻或者纵向相邻。图2为一实施例中的像素划分示意图。在本实施例中，每个像素组90中包括4个横向相邻的像素，每个像素均包括依次相邻设置的红色子像素R、绿色子像素G和蓝色子像素B，也即每个像素组 90中包括4个蓝色子像素。并且，四个横向相邻的像素再被划分为两个相邻的像素单元92和94。图3为另一实施例中的像素划分示意图。在本实施例中，每个像素组90中包括4个纵向相邻的像素，也即其包括4个蓝色子像素。图4为又一实施例中的像素划分示意图。在本实施例中，每个像素组90包括两个横向相邻的像素。在另一实施例中，每个像素组90包括两个纵向相邻的像素，如图5所示。可以理解，显示面板上的像素划分方法包括但并不限于此。
步骤S120，根据画面输入信号求取每个像素组的显示色相。
显示色相是基于CIE LCH颜色空间系统并参考CIE规范的各色彩空间坐标的函数求取得到的。具体地，L＝f1(R、G、B)，C＝f2(R、G、B)，H＝f3(R、G、B)。其中，L表示亮度，C表示色彩纯度，代表颜色的鲜艳程度，H表示显示色相，也即颜色代表。上述函数关系根据CIE规范即可获知。CIE LCH颜色空间系统如图6所示。图6中仅给出了主要颜色代表颜色如红色、黄色、绿色和蓝色的位置示意，而并未给出其他颜色的位置示意。由于CIE LCH颜色空间系统是本领域技术人员熟知的一个颜色空间系统，故仅提供图6本领域技术人员也可以知晓完整的CIE LCH颜色空间系统的情况。在CIE LCH颜色空间系统中，用0～360°代表不同色相颜色呈现。其中定义0°为红色，90°为黄色，180°为绿色，270°为蓝色。每个像素组的显示色相H可以通过该像素组的平均驱动电压来计算获取。
具体地，每个像素均包括红色子像素、绿色子像素和蓝色子像素。因此，先求取每个像素组当前的各种颜色子像素的平均灰阶值R′n、G′n、B′n。
R′n＝Average(R1+R2+……+Rm)；
G′n＝Average(G1+G2+……+Gm)；
B′n＝Average(B1+B2+……+Bm)。
其中，n表示划分后的像素组的序号，m表示红色子像素、绿色子像素和蓝色子像素各自在该像素组n内同种颜色子像素的顺序编号。以图4和图5中的划分为例，该实施例中每个像素组的红色子像素、绿色子像素和蓝色 子像素的平均灰阶值R′n、G′n、B′n：
R′n＝Average(Rn+Rn+1)，n＝1，3，5……
G′n＝Average(Gn+Gn+1)，n＝1，3，5……
B′n＝Average(Bn+Bn+1)，n＝1，3，5……
此时，n表示红色子像素、绿色子像素和蓝色子像素各自在整个显示面板上同种颜色子像素的顺序编号。
因此，将上述平均灰阶值R′n、G′n和B′n带入函数关系H＝f3(R、G、B)即可求取出对应像素组的显示色相：
H＝f3(R′n、G′n、B′n)。
在一实施例中，还会同时根据上述平均灰阶值求取每个像素组的色彩纯度C。色彩纯度C的范围表示在0到100，100代表色彩最为鲜艳。色彩纯度C的数值在一定程度表现了显示装置的显示驱动时的电压信号。将上述平均灰阶值R′n、G′n和B′n带入函数关系C＝f2(R、G、B)中，即可求取出对应像素组的色彩纯度：
C＝f2(R′n、G′n、B′n)。
步骤S130，根据所述显示色相所属的色相范围获取查找表。
在确定每个像素组的显示色相所属的色相范围之前，会预先将色相值划分为多个范围区域。每个范围区域可以根据需要改善的色偏程度来确定。在本实施例中，将色相值划分为6个区域：第一区，0°＜H≤45°和315°＜H≤360°；第二区，45°＜H≤135°；第三区，135°＜H≤205°；第四区，205°＜H≤245°；第五区，245°＜H≤295°；以及第六区，295°＜H≤315°。因此，根据求取得到的每个像素组的显示色相即可确定其所属的范围。可以理解，显示色相值的划分可以根据实际需要进行划分，并不限于此。
查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表。驱动电压对包括一高一低的驱动电压，也即由高驱动电压B′H和低驱动电压B′L组成。具体地，查找表中蓝色子像素的颜色灰阶值0～255对应有256对高低驱动电压信号。每一组高低驱动电压能够使得调节后的蓝色子像素在侧视下 的亮度随灰阶变化曲线更接近正视下的亮度随灰阶变化曲线。通过高低电压驱动每个子像素组中的蓝色子像素，可以使得侧视角下蓝色子像素的亮度变化得到控制，使得蓝色子像素的饱和趋势接近红色子像素和蓝色子像素或者同正视下红色子像素、绿色子像素和蓝色子像素的亮度饱和曲线趋势接近，来减少视角色偏的缺陷。图7为蓝色子像素采用单一驱动电压时在正视图和侧视角下的亮度随灰阶值变化曲线，其中，L71表示正视下的曲线，L72表示侧视下的曲线。显然在侧视下其亮度随灰阶值变化曲线容易趋近饱和，从而使得混色视角观察画质会呈现偏蓝色偏的明显缺陷。图8为采用高低驱动电压对进行驱动和分别采用高电压驱动、低电压驱动在侧视角下的亮度变化曲线的对比示意图。其中，L81为高电压驱动时在侧视角下看到的亮度随灰阶变化曲线，L82为低驱动电压在侧视角下看到的亮度随灰阶变化曲线，而L83为L81和L82混合，也即采用高低驱动电压对后看起来的亮度随灰阶变化曲线，显然其更接近正视下的亮度随灰阶变化曲线L84，也即采用高低驱动电压对后能够使得视角色偏获得改善。
不同的色相范围对视角色偏的影响不同，因此不同的色相范围对应不同的查找表，从而使得对应于不同的色相范围能够通过更为适合该色相范围的驱动电压对来进行驱动，确保调节后的蓝色子像素在侧视下的亮度随灰阶变化更接近正视下的变化曲线。查找表与色相范围存在一一对应关系，并且该对应关系表会预先进行存储。例如，第一区对应第一查找表，第二区对应第二查找表，第三区对应第三查找表，依次类推。该对应关系表以及查找表可以同时存储在一个存储器内，也可以分别存储。存储器可以为显示装置内的存储设备，也可以直接利用外部存储设备进行存储，需要时向外部获取即可。因此，根据获取到的各像素组的色相范围即可确定对应的查找表。
在另一实施例中，查找表需要同时根据显示色相和色彩纯度所属的范围进行获取。具体地，不同的色相范围有不同的色彩纯度设定。对应于不同区的色彩纯度的范围设置也可以根据实际需要改善的色偏程度来决定。例如，色相范围第一区对应第一色彩纯度范围CTL1≤C≤CTH1；色相范围第二区对应 第二色彩纯度范围CTL2≤C≤CTH2；色相范围第三区对应第三色彩纯度范围CTL3≤C≤CTH3；依次类推。因此，根据求取到的显示色相和色彩纯度可以确定其所属的范围。以本实施例为例，当显示色相H和色彩纯度C均满足以下两个条件时，即可确定其属于第一范围：
0°＜H≤45°或者315°＜H≤360°；
CTL1≤C≤CTH1。
当显示色相H和色彩纯度C均满足以下两个条件时，即可确定其属于第二范围：
45°＜H≤135°；
CTL2≤C≤CTH2。
因此，根据显示色相和色彩纯度所属的范围即可获取到对应的查找表。
步骤S140，根据每个像素组中的蓝色子像素的平均灰阶值利用对应的查找表获取驱动电压对。
不同的显示色相和色彩纯度范围对应不同的查找表，从而使得最终获取到的驱动电压对更接近理想驱动电压，进而使得调节后的蓝色子像素的亮度变化更接近理想状况。
步骤S150，根据该驱动电压对对相应的像素组上的蓝色子像素进行驱动。
在本实施例中，驱动电压对用于对两个像素单元进行分别驱动。高驱动电压驱动其中一个像素单元，低驱动电压驱动另外一个像素单元，从而实现相邻蓝色子像素的高低电压相间驱动，如图9和图10所示。在本实施例的驱动方法中，其他子像素如红色子像素或者绿色子像素等的驱动可以根据常见的驱动方式进行驱动即可。
上述显示装置的驱动方法，根据显示面板上每个像素组的显示色相所属的范围选择相应的具有一高一低的驱动电压对来进行驱动。通过高低电压驱动每个像素组中的蓝色子像素，可以使得侧视角下蓝色子像素的亮度变化得到控制，使得蓝色子像素的饱和趋势接近红色子像素和蓝色子像素或者同正视下红色子像素、绿色子像素和蓝色子像素的亮度饱和曲线趋势接近，来减 少视角色偏的缺陷。同时，通过形成多组驱动电压对以对蓝色子像素进行驱动，可以确保补偿后的画面亮度与目标亮度贴近，有效改善大视角蓝色子像素过早饱和造成色偏的缺陷。
上述驱动方法，通过对显示面板上的各像素进行划组，从而使得每个像素组都能够根据显示色相采用不同的高低驱动电压对进行驱动，以减少视角色偏缺陷。下面结合图11～13对多组驱动电压进行分别驱动的重要性进行说明。参考附图11，Target gamma为目标blue pixel(蓝色子像素)亮度随灰阶变化曲线，对应于图中的L13。透过蓝色子像素分割必须满足正看RGB亮度比例不变化。蓝色子像素空间分割的高电压与低电压信号有多种组合，每种组合造成的侧看亮度随电压变化饱和的情况不同。如附图11，蓝色子像素空间分割的高电压与低电压组合gamma1与gamma2两种侧看亮度随灰阶变化饱和的情况，分别对应图中的L12和L11。图12和图13为图11的局部放大示意图。从图11～13中可以看出，采用一组高低电压对对显示面板上的蓝色子像素进行驱动，其亮度随灰阶变换曲线的饱和趋势比Target gamma的变化趋势快很多，从而并不能很好解决侧视角色偏问题。也即，仅一种蓝色子像素空间分割的高电压与低电压组合无法同时满足高低电压亮度与目标亮度贴近的需求。
如附图12所示，当考量低电压(也即低灰阶值)与亮度变化关系时，gamma1的实际亮度与目标亮度的差异d1(n)，远大于gamma2的实际亮度与目标亮度的差异d2(n)。但是如附图13，当考量高电压(也即高灰阶值)与亮度变化关系时，gamma1的实际亮度与目标亮度的差异d1(n)，远小于gamma2的实际亮度的差异d2(n)。也即，gamma1适合当画质内容上呈现蓝色子像素较高电压信号(也即高灰阶值)的时候。反之，gamma2适合当画质内容上呈现蓝色子像素较低电压信号(也即低灰阶值)的时候。而本实施例中的驱动方法，针对不同的平均灰阶值选用不同的高低电压组合进行驱动，从而可以很好的克服上述问题。并且，采用上述驱动方法后，显示面板上的像素不用再设计成主要和次要像素，从而大大提升了TFT显示面板的穿透率和解析度， 减少了背光设计成本。
本申请还提供一种显示装置，如图14所示。该显示装置可以执行上述驱动方法。该显示装置包括背光模组410、显示面板420、控制部件430和驱动部件440。控制部件430和驱动部件440均可以集成在显示面板420上，而背光模组410则可以直接采用独立的背光模组来实现。可以理解，各部件的集成方式并不限于此。
背光模组410设置为提供背光。背光模组410可以为直下式背光或者侧背光。背光源可以为白光、RGB三色光源、RGBW四色光源或者RGBY四色光源，但并不限于此。
显示面板420可以为LCD显示面板、OLED显示面板、QLED显示面板等显示面板，同时显示面板420也可以为平面显示面板或者曲面显示面板中。可以理解，显示面板420的种类包括但并不限于上述示例。当显示面板420为LCD显示面板时，其可以为TN、OCB或者VA型等LCD显示面板。在本实施例中，显示面板420上的像素被划分为多个像素组。每个像素组包括偶数个依次相邻的像素。划分方法可以参考图2～5，但并不限于此。
控制部件430包括存储器和至少一个处理器。存储器中存储有可被至少一个处理器执行的计算机可执行指令，该计算机可执行指令被所述至少一个处理器执行时，使得所述至少一个处理器执行以下计算单元432和获取单元434中的步骤，如图15所示。其中，计算单元432设置为根据画面输入信号求取每个像素组的显示色相。获取单元434设置为根据显示色相所属的色相范围获取查找表。查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表。驱动电压对包括一高一低的驱动电压。获取单元434还设置为根据每个像素组中的蓝色子像素的平均灰阶值利用对应的查找表获取驱动电压对。在另一实施例中，计算单元432还设置为根据画面输入信号求取每个像素组的色彩纯度。获取单元434还设置为根据每个像素组的显示色相和色彩纯度获取对应的驱动电压对。
驱动部件440分别与控制部件430和显示面板420连接。驱动部件440 设置为根据该驱动电压对对相应的像素组上的蓝色子像素进行驱动。
上述显示装置，根据显示面板420上每个像素组的显示色相所属的范围选择相应的具有一高一低的驱动电压对来进行驱动。通过高低电压驱动每个像素组中的蓝色子像素，可以使得侧视角下蓝色子像素的亮度变化得到控制，使得蓝色子像素的饱和趋势接近红色子像素和蓝色子像素或者同正视下红色子像素、绿色子像素和蓝色子像素的亮度饱和曲线趋势接近，来减少视角色偏的缺陷。同时，通过形成多组驱动电压对以对蓝色子像素进行驱动，可以确保补偿后的画面亮度与目标亮度贴近，有效改善大视角蓝色子像素过早饱和造成色偏的缺陷。
在某些实施方式中，显示装置可以为LCD显示装置、OLED显示装置、QLED显示装置等，同时显示装置也可以为平面显示装置或者曲面显示装置，在显示装置不为LCD显示装置时，显示装置可以不包括背光模组410.
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)等非易失性存储介质，或随机存储记忆体(Random Access Memory，RAM)等。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (19)

  1. 一种显示装置的驱动方法，包括：
    将显示面板上的像素划分为多个像素组；每个像素组包括偶数个依次相邻的像素；
    根据画面输入信号求取每个像素组的显示色相；
    根据所述显示色相所属的色相范围获取查找表；所述查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表；所述驱动电压对包括一高一低的驱动电压；
    根据每个像素组中的蓝色子像素的平均灰阶值利用对应的查找表获取驱动电压对；以及
    根据所述驱动电压对对相应的像素组上的蓝色子像素进行驱动。
  2. 根据权利要求1所述的方法，其中，所述将显示面板上的像素划分为多个像素组的步骤中，每个像素组包括偶数个依次横向相邻或者纵向相邻的像素。
  3. 根据权利要求1所述的方法，其中，所述根据画面输入信号求取每个像素组的显示色相的步骤包括：
    根据画面输入信号计算每个像素组中各种颜色子像素的平均灰阶值；以及
    根据画面输入信号中的每个像素组中各种颜色子像素的平均灰阶值求每个像素组的显示色相。
  4. 根据权利要求1所述的方法，其中，所述根据画面输入信号求取每个像素组的显示色相的步骤中，还包括根据所述画面输入信号求取每个像素组的色彩纯度的步骤；
    所述根据所述显示色相所属的色相范围获取查找表的步骤为，根据每个像素组的显示色相和色彩纯度所属的范围获取对应的查找表。
  5. 根据权利要求1所述的方法，还包括预先存储各色相范围与查找表的对应关系和所述查找表的步骤。
  6. 根据权利要求1所述的方法，其中，所述根据所述驱动电压对对相应的像素组上的蓝色子像素进行驱动的步骤包括：
    将每个像素组划分为两个相邻的像素单元；以及
    将所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动。
  7. 根据权利要求6所述的方法，其中，所述将所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动的步骤中，控制相邻两个像素单元中的蓝色子像素的驱动电压为一高一低。
  8. 根据权利要求6所述的方法，其中，每个像素组中均包括两个横向或者纵向相邻的蓝色子像素；所述根据所述驱动电压对对相应的像素组上的蓝色子像素进行驱动的步骤为，根据所述驱动电压对对相应的像素组上的两个蓝色子像素进行分别驱动。
  9. 一种显示装置，包括：
    显示面板，所述显示面板上的像素被划分为多个像素组；每个像素组包括偶数个依次相邻的像素；
    背光模组，设置为向所述显示面板提供背光；
    控制部件，所述控制部件包括存储器和至少一个处理器；所述存储器中存储有可被所述至少一个处理器执行的计算机可执行指令，所述计算机可执行指令被所述至少一个处理器执行时，使得所述至少一个处理器执行以下单元中的步骤：
    计算单元，设置为根据画面输入信号求取每个像素组的显示色相；和
    获取单元，设置为根据所述显示色相所属的色相范围获取查找表；所述查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表；所述驱动电压对包括一高一低的驱动电压；
    所述获取单元还设置根据每个像素组中的蓝色子像素的平均灰阶值利用对应的查找表获取驱动电压对；以及
    驱动部件，分别与所述控制部件和所述显示面板连接；所述驱动部件设置为根据所述驱动电压对对相应的像素组上的蓝色子像素进行驱动。
  10. 根据权利要求9所述的显示装置，其中，所述显示面板上的每个像素组包括偶数个依次横向相邻或者纵向相邻的像素。
  11. 根据权利要求9所述的显示装置，其中，所述计算单元还设置为根据画面输入信号计算每个像素组中各种颜色子像素的平均灰阶值，并根据所述画面输入信号中各种颜色子像素的平均灰阶值求每个像素组的显示色相。
  12. 根据权利要求9所述的显示装置，其中，所述计算单元还设置为根据所述画面输入信号求取每个像素组的色彩纯度；所述获取单元设置为根据每个像素组的显示色相和色彩纯度所属的范围获取对应的查找表。
  13. 根据权利要求9所述的显示装置，还包括存储器；所述存储器设置为存储各色相范围与查找表的对应关系和所述查找表。
  14. 根据权利要求9所述的显示装置，其中，所述显示面板上的每个像素组被划分为两个相邻的像素单元；所述驱动部件设置为根据所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动。
  15. 根据权利要求14所述的显示装置，其中，所述驱动部件根据所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动时，控制相邻两个像素单元中的蓝色子像素的驱动电压为一高一低。
  16. 根据权利要求14所述的显示装置，其中，每个像素组中均包括两个横向或者纵向相邻的蓝色子像素；所述驱动部件设置为根据所述驱动电压对对相应的像素组上的两个蓝色子像素进行分别驱动。
  17. 根据权利要求9所述的显示装置，其中，所述显示面板为平面显示面板或者曲面显示面板。
  18. 一种显示装置，包括：
    显示面板，所述显示面板上的像素被划分为多个像素组；每个像素组包括偶数个依次横向相邻或者纵向相邻的像素；每个像素组被划分为两个相邻的像素单元；
    背光模组，设置为向所述显示面板提供背光；
    控制部件，所述控制部件包括存储器和至少一个处理器；所述存储器中 存储有可被所述至少一个处理器执行的计算机可执行指令，所述计算机可执行指令被所述至少一个处理器执行时，使得所述至少一个处理器执行以下单元中的步骤：：
    计算单元，设置为根据画面输入信号计算每个像素组中各种颜色子像素的平均灰阶值，并根据所述画面输入信号中各种颜色子像素的平均灰阶值求每个像素组的显示色相；所述计算单元还设置为根据所述画面输入信号求取每个像素组的色彩纯度；和
    获取单元，设置为根据所述显示色相和色彩纯度所属的范围获取查找表；所述查找表为蓝色子像素的颜色灰阶值与驱动电压对的对应关系表；所述驱动电压对包括一高一低的驱动电压；
    所述获取单元还设置为根据每个像素组中的蓝色子像素的平均灰阶值利用对应的查找表获取驱动电压对；以及
    驱动部件，分别与所述控制部件和所述显示面板连接；所述驱动部件设置为根据所述驱动电压对对相应的像素组上的两个像素单元中的蓝色子像素进行分别驱动。
  19. 根据权利要求18所述的显示装置，其中，所述驱动部件根据所述驱动电压对对两个像素单元中的蓝色子像素进行分别驱动时，控制相邻两个像素单元中的蓝色子像素的驱动电压为一高一低。
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