WO2019071697A1 - 显示面板的驱动方法及显示装置 - Google Patents

显示面板的驱动方法及显示装置 Download PDF

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Publication number
WO2019071697A1
WO2019071697A1 PCT/CN2017/110219 CN2017110219W WO2019071697A1 WO 2019071697 A1 WO2019071697 A1 WO 2019071697A1 CN 2017110219 W CN2017110219 W CN 2017110219W WO 2019071697 A1 WO2019071697 A1 WO 2019071697A1
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Prior art keywords
driving
threshold
sub
driving signal
smaller
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French (fr)
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单剑锋
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HKC Co Ltd
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HKC Co Ltd
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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
    • 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
    • G09G3/2003—Display 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
    • 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/026—Control of mixing and/or overlay of colours in general
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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

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 panel.
  • the large-size LCD panel of the example usually adopts negative VA (Vertical Alignment) liquid crystal or IPS (In-Plane Switching) liquid crystal technology, and VA type liquid crystal technology has higher production than IPS liquid crystal technology.
  • VA Very Alignment
  • IPS In-Plane Switching
  • the brightness of each sub-pixel is saturated (ie, the curve tends to be flat) in the side view angle, and the brightness is rapidly saturated, especially at medium and low driving voltages, and the contrast is lowered, so that when viewing images under a mixed viewing angle, There will be a significant washout phenomenon (ie, the picture is white, and the brightness cannot vary linearly with the drive voltage).
  • a driving method and a display device for a display panel are provided, which can alleviate the phenomenon of whitening of a screen.
  • a driving method of a display panel comprising:
  • Adjusting the size of the driving signal of each sub-pixel on the display panel, so that the adjusted driving signal is Setting the interval to be close; in the set interval, the tangent slope of each point on the curve whose brightness changes with the driving signal is greater than a set slope threshold;
  • the corresponding sub-pixels are driven by the adjusted drive signal.
  • a display device includes a driving chip and a display panel; the driving chip is configured to adjust a size of a driving signal of each sub-pixel on the display panel, so that the adjusted driving signal is closer to the setting interval, and the adjusted The driving signal drives a corresponding sub-pixel on the display panel; wherein, within the set interval, a tangent slope of each point on the curve of the brightness that varies with the driving signal is greater than a set slope threshold.
  • a driving method of the display panel wherein the driving signal is smaller than the first driving threshold, greater than the second driving threshold, and larger than the first in the curve of the brightness of the display panel
  • the driving threshold is smaller than the second driving threshold
  • the tangent slopes respectively correspond to the set slope threshold, greater than the set slope threshold, and less than the set slope threshold;
  • Sub-pixels of the same color on the display panel are divided into groups of sub-pixel groups
  • each driving signal greater than the average driving signal is subtracted from the fifth setting value;
  • the corresponding sub-pixels are driven by the adjusted drive signal.
  • the size of the driving signal of each sub-pixel on the display panel is adjusted such that the adjusted driving signal is close to the setting interval, wherein the brightness varies with the driving signal in the setting interval.
  • the tangent slope of each point on the curve is greater than the set slope threshold. Therefore, the above method adjusts the driving signal of the brightness saturation of the example to the interval where the slope of the curve is large by adjusting the value of the driving signal set to drive the sub-pixel, thereby enhancing the contrast of the brightness at a large viewing angle and improving the large viewing angle. Brightness saturation reduces the washout phenomenon.
  • 1 is a graph showing the brightness of a sub-pixel 0 degree angle and a 60 degree angle of a sub-pixel of an exemplary display panel as a function of driving voltage;
  • FIG. 2 is a flow chart of a driving method of a display panel according to an embodiment
  • step S100 is a flow chart of one embodiment of step S100 in the driving method of the display panel of the embodiment shown in FIG. 2;
  • FIG. 4 is a schematic diagram of dividing a red sub-pixel on a display panel of an embodiment of a driving method of the display panel of the embodiment shown in FIG. 2;
  • FIG. 5 is a schematic diagram of a red sub-pixel group on the display panel of the embodiment shown in FIG. 4;
  • FIG. 6 is a flow chart of one embodiment of step S120 in the embodiment shown in Figure 3;
  • FIG. 7 is a schematic diagram showing a curve of brightness of a red sub-pixel of a display panel as a function of a driving signal
  • FIG. 8 is a schematic diagram showing a curve of a green sub-pixel brightness of a display panel as a function of a driving signal
  • FIG. 9 is a schematic diagram showing a curve of brightness of a blue sub-pixel of a display panel as a function of a driving signal
  • FIG. 10 is a block diagram of a display device provided by another embodiment.
  • Figure 1 is a graph showing the brightness of an exemplary VA type liquid crystal display panel as a function of driving voltage.
  • the abscissa is the driving voltage
  • the ordinate is the brightness
  • the solid line is a curve of 0°
  • the broken line is a curve of 60°.
  • an embodiment provides a driving method of a display panel, which can be executed by a driving chip and configured to drive a display panel to display a corresponding image.
  • the display panel may be TN (Twisted Nematic), OCB (Optically Compensated Birefringence), VA (Vertical Alignment) type liquid crystal display panel, curved liquid crystal display panel or other types. Display panel, but not limited to this.
  • the driving method of the display panel includes the following contents, please refer to FIG. 2.
  • step S100 the size of the driving signal of each sub-pixel on the display panel is adjusted, so that the adjusted driving signal approaches the set interval.
  • the tangent slope of each point on the curve in which the brightness changes with the driving signal is greater than the set slope threshold.
  • the driving signal is, for example, a driving voltage supplied from the driving chip to the display panel.
  • the sub-pixels may be red sub-pixels, green sub-pixels or blue sub-pixels.
  • the tangential slope of each point on the curve whose brightness changes with the driving signal is greater than the set slope threshold, which means that the slope of the corresponding curve of the set interval is larger, that is, the degree of change of the brightness with the driving signal is more obvious. Contrast, closer to the trend of linear changes.
  • the magnitude of the driving signal in the interval in which the curve is relatively flat ie, the luminance tends to be saturated
  • the magnitude of the driving signal in the interval in which the curve is relatively flat ie, the luminance tends to be saturated
  • the adjusted driving signal approaches a section where the slope of the curve is large, thereby improving the saturation of the luminance.
  • step S200 the corresponding sub-pixels are driven by the adjusted driving signals.
  • the driving chip inputs the above-mentioned adjusted driving signal to the display panel, thereby driving the corresponding
  • the sub-pixel displays the corresponding image.
  • the driving signal of the sub-pixel can be adjusted to a range where the brightness is low saturation or even not saturated, so that the brightness is more linear with the driving signal.
  • the trend of change which can improve the washout phenomenon that is presented when viewing images at a large viewing angle.
  • the driving signal when the driving signal is respectively smaller than the first driving threshold, greater than the second driving threshold, greater than the first driving threshold, and smaller than the second driving threshold
  • the tangent slopes are respectively greater than the set slope threshold, greater than the set slope threshold, and less than the set slope threshold.
  • the luminances of the red sub-pixel, the green sub-pixel, and the blue sub-pixel are sequentially shown as a function of the side viewing angle and the positive viewing angle as a function of the driving voltage.
  • RN and RM are the first driving threshold and the second driving threshold corresponding to the red sub-pixel, respectively.
  • the tangent slopes of the curves in the RI interval and the RIII interval are both greater than the set slope threshold.
  • the tangent slope of the curve in the RII interval is smaller than the set slope threshold, and the brightness in the RII interval is saturated.
  • GN and GM are the first driving threshold and the second driving threshold corresponding to the green sub-pixel, respectively.
  • the tangent slopes in the GI interval and the GIII interval are both greater than the set slope threshold.
  • the tangent slope of the curve in the GII interval is smaller than the set slope threshold, and the brightness in the GII interval is saturated.
  • BN and BM are the first driving threshold and the second driving threshold corresponding to the blue sub-pixel, respectively.
  • the tangent slopes of the curves in the BI interval and the BIII interval are larger than the set slope threshold.
  • the tangent slope of the curve in the BII interval is smaller than the set slope threshold, and the brightness in the BII interval is saturated.
  • step S100 is: adjusting the driving signal larger than the first driving threshold and smaller than the second driving threshold to be closer to the section smaller than the first driving threshold or larger than the second driving threshold.
  • the drive signal is located within a range greater than the first drive threshold and less than the second drive threshold, the value of the drive signal is decreased to approach the interval less than the first drive threshold, or the value of the drive signal is increased to A section larger than the second drive threshold is close.
  • the driving signal on the left side of the interval may be subtracted from the corresponding value, thereby entering or approaching the RI interval; On the right side of the interval The drive signal is incremented by a corresponding value to enter or approach the RIII interval.
  • the driving signal located in the RII interval is located at or near the RI interval and the RIII interval, so that the brightness at the side viewing angle tends to linearly change with the change of the driving signal.
  • the principle of signal processing for the green sub-pixel and the blue sub-pixel is the same as that of the above-described red sub-pixel, and will not be described here.
  • step S100 includes the following content, please refer to FIG. 3.
  • Step S110 dividing sub-pixels of the same color on the display panel into a plurality of sets of sub-pixel groups.
  • the red sub-pixels on the display surface can be divided into a plurality of sets of red sub-pixel groups.
  • the green sub-pixels on the display panel are divided into groups of green sub-pixel groups.
  • the blue sub-pixels on the display panel are divided into groups of blue sub-pixel groups.
  • the red sub-pixel is taken as an example, please refer to FIG. 4. All red sub-pixels on the display panel are divided into Z red sub-pixel groups (R1, R2, ..., RZ).
  • each red sub-pixel group includes a plurality of red sub-pixels (ie, Rn_1, 1, Rn_1, 2, ..., Rn_i*j).
  • Step S120 For each group of sub-pixel groups, the driving signal that is greater than the first driving threshold and smaller than the second driving threshold is adjusted to be closer to the interval smaller than the first driving threshold or greater than the second driving threshold.
  • the adjustment of the driving signal can be performed according to the first driving threshold RN and the second driving threshold RM shown in FIG. 7 .
  • the adjustment of the driving signal can be performed in accordance with the first driving threshold GN and the second driving threshold GM shown in FIG.
  • the adjustment of the driving signal can be performed in accordance with the first driving threshold BN and the second driving threshold BM shown in FIG.
  • the sub-pixels of the display panel are divided into a plurality of sub-pixel groups, which facilitates the process of independently performing signal processing for each sub-pixel group, and can effectively process the characteristics of the local sub-pixel luminance.
  • the more the number of sub-pixel groups in the display panel the higher the accuracy of signal processing, so that the quality of the displayed picture is better.
  • the number of divisions of the sub-pixel group can be adjusted according to actual conditions, so that the range of use of the method can be expanded.
  • step S120 specifically includes the following content, please refer to FIG. 6.
  • step S121 an average driving signal is calculated for each group of sub-pixel groups.
  • step S122 when it is determined that the average driving signal is smaller than the first driving threshold, each driving signal larger than the average driving signal is decreased by the first set value.
  • the red sub-pixel is still taken as an example, and each sub-pixel is arranged in descending order of driving signals, that is, R1 ⁇ R2 ⁇ R3 ⁇ Vietnamese ⁇ R_i*j (where R1, R2, . . . , R_i *j represents a drive signal corresponding to each sub-pixel in the red sub-pixel group).
  • R1 ⁇ R2 ⁇ R3 ⁇ a driving signal corresponding to each sub-pixel in the red sub-pixel group.
  • each sub-pixel of the red sub-pixel group that is larger than the average driving signal has a large saturation of the large viewing angle before the driving signal is adjusted. That is, some sub-pixels are in the RII interval, or relatively close to the RII interval.
  • the driving signals of the sub-pixels are subtracted from the first set value, thereby improving the linear resolution of the large-view luminance curve of the sub-pixels, thereby Enhance the contrast of brightness between these sub-pixels at large viewing angles.
  • the first set value is such that at least the value obtained by subtracting the first set value from the largest driving signal in the sub-pixel group is smaller than the first driving threshold.
  • the driving signal by adjusting the driving signal, the driving signals of all the sub-pixels of the sub-pixel group can be moved into the RI section.
  • the size of the first set value may be adjusted according to different characteristics of different display panels or different use scenarios of the same display panel, thereby further improving the effectiveness of improving brightness saturation.
  • step S120 further includes: adding, when the average driving signal is smaller than the first driving threshold, adding a second setting value to each driving signal that is smaller than the average driving signal.
  • the second setting is:
  • Rave_1 is the second set value.
  • k is the number of sub-pixels corresponding to the drive signal larger than the average drive signal in the sub-pixel group.
  • X1 is the first set value.
  • n is the number of sub-pixels in the sub-pixel group.
  • the brightness of the entire sub-pixel group can be kept conserved.
  • the driving signals since each driving signal smaller than the average driving signal is added with the second set value, the driving signals can still be in a relatively low position within a range smaller than the first driving threshold, so that the large viewing angle luminance curve can still be ensured linearly. The ability to resolve does not affect the contrast characteristics of the viewing angle signal.
  • step S120 further includes: adding, when the average driving signal is greater than the first driving threshold and less than the second driving threshold, adding a third setting value to each driving signal that is greater than the average driving signal.
  • the red sub-pixel is still taken as an example, and each sub-pixel is arranged in descending order of driving signals, that is, R1 ⁇ R2 ⁇ R3 ⁇ Vietnamese ⁇ R_i*j (where R1, R2, . . . , R_i *j represents a drive signal corresponding to each sub-pixel in the red sub-pixel group).
  • R1 ⁇ R2 ⁇ R3 ⁇ a driving signal corresponding to each sub-pixel in the red sub-pixel group.
  • each sub-pixel of the red sub-pixel group that is larger than the average driving signal has a large viewing angle before the driving signal is adjusted.
  • the case of brightness saturation is more serious (ie, some sub-pixels are in the RII interval, or closer to the RII interval). Therefore, in the embodiment, the driving signals of the sub-pixels are added to the second set value, so that the driving signals of the sub-pixels can be adjusted to the RIII interval or closer to the RIII interval, so that the linear resolution of the large viewing angle brightness curve is strengthened. To enhance the contrast of brightness between these sub-pixels at large viewing angles.
  • the second set value is such that at least the value of the smallest driving signal among the driving signals larger than the average driving signal in the sub-pixel group is added to the third set value is greater than the second driving threshold.
  • the driving signal by adjusting the driving signal, all the driving signals of the sub-pixels of the sub-pixel group larger than the average driving signal can be moved to the RIII interval.
  • the size of the third set value may be adjusted according to different characteristics of different display panels or different use scenarios of the same display panel, and further Improve the effectiveness of brightness saturation improvement.
  • step S120 further includes: when determining that the average driving signal is greater than the first driving threshold and less than the second driving threshold, subtracting the fourth setting from each driving signal that is smaller than the average driving signal.
  • the fourth setting is:
  • Rave_2 is the fourth set value.
  • k is the number of sub-pixels corresponding to the drive signal larger than the average drive signal in the sub-pixel group.
  • X2 is the above third set value.
  • n is the number of sub-pixels in the sub-pixel group.
  • R'(k+1), R'(k+2)....., R'(i*j) are the adjusted drive signals.
  • the above processing method can keep the brightness of the entire sub-pixel group constant.
  • each sub-pixel of the red sub-pixel group that is smaller than the average driving signal has a large viewing angle before the driving signal is adjusted.
  • the case of brightness saturation is more serious (ie, some sub-pixels are in the RII interval, or closer to the RII interval). Therefore, in the embodiment, the driving signals of the sub-pixels are subtracted from the fourth set value, so that the driving signals of the sub-pixels can be adjusted to the RI interval or closer to the RI interval, so that the linear resolution of the large viewing angle brightness curve is strengthened. , thereby enhancing the contrast of the driving signals between these sub-pixels under a large viewing angle, and improving the linear resolution capability of the large viewing angle luminance curve.
  • step S120 further includes: when determining that the average driving signal is greater than the second driving threshold, subtracting each driving signal larger than the average driving signal by the fifth setting value.
  • the red sub-pixel is still taken as an example, and each sub-pixel is arranged in descending order of driving signals, that is, R1 ⁇ R2 ⁇ R3 ⁇ Vietnamese ⁇ R_i*j (where R1, R2, . . . , R_i *j represents a drive signal corresponding to each sub-pixel in the red sub-pixel group).
  • R1, R2, . . . , R_i *j represents a drive signal corresponding to each sub-pixel in the red sub-pixel group.
  • X3 is the fifth set value.
  • R’1, R’2,.....,R’k The first k adjusted drive signals.
  • step S120 further includes: adding, when the average driving signal is greater than the second driving threshold, adding a sixth setting value to each driving signal that is smaller than the average driving signal.
  • the sixth setting is:
  • Rave_3 is the sixth set value.
  • k is the number of sub-pixels corresponding to the drive signal larger than the average drive signal in the sub-pixel group.
  • X3 is the fifth set value.
  • n is the number of sub-pixels in the sub-pixel group.
  • R'(k+1), R'(k+2)....., R'(i*j) are the adjusted drive signals.
  • the brightness of the sub-pixel group can be kept conserved.
  • each of the driving signals smaller than the average driving signal is added with the sixth set value, it may still be in a relatively high position (for example, RII interval) in the RIII interval or in the interval larger than the first driving threshold and smaller than the second driving threshold.
  • the higher position inside therefore, ensures that the large viewing angle brightness curve has the ability to linearly resolve, thereby enhancing the contrast of brightness between these sub-pixels at large viewing angles.
  • FIG. 2, FIG. 3 and FIG. 6 are schematic flowcharts of the method according to the embodiment of the present application. It should be understood that although the steps in the flowcharts of FIGS. 2, 3, and 6 are sequentially displayed in accordance with the indication of the arrows, these steps are not necessarily performed in the order indicated by the arrows. Except as explicitly stated herein, the execution of these steps is not strictly limited, and may be performed in other sequences. Moreover, at least some of the steps in FIG. 2, FIG. 3, and FIG. 6 may include a plurality of sub-steps or stages, which are not necessarily performed at the same time, but may be executed at different times. The order of execution is not necessarily sequential, but may be alternately or alternately performed with at least a portion of other steps or sub-steps or stages of other steps. Row.
  • a driving chip 110 and a display panel 120 are included.
  • the driving chip 110 is configured to adjust a size of a driving signal of each sub-pixel on the display panel 120, so that the adjusted driving signal is close to the setting interval, and the corresponding driving signal is used to drive the corresponding display panel 120.
  • Subpixels Wherein, in the set interval, the tangent slope of each point on the curve whose brightness changes with the driving signal is greater than the set slope threshold.
  • the tangent slopes respectively correspond to the set slope threshold, greater than the set slope threshold, and less than the set slope threshold;
  • the driving chip 110 is specifically configured to adjust a driving signal that is greater than the first driving threshold and smaller than the second driving threshold to be closer to a section that is smaller than a first driving threshold or greater than a second driving threshold.
  • the driving chip 110 is specifically configured to divide sub-pixels of the same color on the display panel 120 into a plurality of groups of sub-pixel groups, and for each group of the sub-pixel groups, the driving chip 110 is specifically configured to adjust a driving signal that is greater than the first driving threshold and smaller than the second driving threshold to be closer to a section that is smaller than a first driving threshold or greater than a second driving threshold.
  • the driving chip 110 is specifically configured to calculate an average driving signal for each group of the sub-pixel groups, and determine that the average driving signal is smaller than the first driving threshold. Each drive signal of the average drive signal is subtracted from the first set value.
  • the first set value needs to be satisfied that the first set value is at least a value obtained by subtracting the first set value from the largest driving signal in the sub-pixel group. Less than the first drive threshold.
  • the driving chip 110 is specifically configured to: when the average driving signal is less than the first driving threshold, add a second setting value to each driving signal that is smaller than the average driving signal;
  • the second set value is:
  • the driving chip 110 is specifically configured to add, when the average driving signal is greater than the first driving threshold and less than the second driving threshold, each driving signal that is greater than the average driving signal. The third set value.
  • the driving chip 110 is specifically configured to: when the average driving signal is greater than the first driving threshold and smaller than the second driving threshold, reduce each driving signal that is smaller than the average driving signal. Go to the fourth set value; the fourth set value is:
  • the driving chip 110 is specifically configured to: when determining that the average driving signal is greater than the second driving threshold, subtracting each driving signal greater than the average driving signal by a fifth setting value.
  • the function performed by the driving chip 110 of the display device provided by the present embodiment is the same as the driving method of the display panel provided by the above embodiment, and details are not described herein again.
  • the display device is, for example, an LCD (Liquid Crystal Display) display device, an OLED (Organic Light-Emitting Diode) display device, a QLED (Quantum Dot Light Emitting Diodes) display device, a curved display device, or other display device.
  • LCD Liquid Crystal Display
  • OLED Organic Light-Emitting Diode
  • QLED Quadantum Dot Light Emitting Diodes

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

本申请涉及一种显示面板的驱动方法及显示装置，所述方法包括：调整显示面板上各子像素的驱动信号的大小，使得调整后的驱动信号向设定区间靠近；在所述设定区间内，亮度随所述驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值；及利用调整后的所述驱动信号驱动相应的子像素。

Description

显示面板的驱动方法及显示装置
相关申请的交叉引用
本申请要求于2017年10月10日提交中国专利局、申请号为201710937013.5、申请名称为“显示面板的驱动方法及显示装置”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
本申请涉及显示技术领域，特别是涉及一种显示面板的驱动方法及显示装置。
背景技术
范例的大尺寸液晶显示面板通常采用负型VA(Vertical Alignment，垂直配向)液晶或IPS(In-Plane Switching，面内转换)液晶技术，VA型液晶技术相较于IPS液晶技术存在较高的生产效率及低制造成本的优势，但光学性质上相较于IPS液晶技术存在较明显的光学性质缺陷，尤其是在大尺寸面板在商业应用方面需要较大的视角呈现的情况下。
范例VA型液晶显示面板在侧视角下各子像素亮度饱和(即曲线趋向平坦)的趋势快速增加，尤其是在中、低驱动电压下，亮度快速饱和，对比度下降，使得混合视角下观看图像时会呈现明显的washout现象(即画面偏白，亮度不能随着驱动电压呈线性变化)。
发明内容
根据本申请的各种实施例，提供一种显示面板的驱动方法及显示装置，能够减轻画面偏白的现象。
一种显示面板的驱动方法，包括：
调整显示面板上各子像素的驱动信号的大小，使得调整后的驱动信号向 设定区间靠近；在所述设定区间内，亮度随所述驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值；及
利用调整后的所述驱动信号驱动相应的子像素。
一种显示装置，包括驱动芯片及显示面板；所述驱动芯片设置为调整显示面板上各子像素的驱动信号的大小，使得调整后的驱动信号向设定区间靠近，并利用调整后的所述驱动信号驱动所述显示面板上相应的子像素；其中，在所述设定区间内，亮度随所述驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值。
一种显示面板的驱动方法，在所述显示面板侧视角下亮度随所述驱动信号变化的曲线中，当所述驱动信号分别小于第一驱动阈值、大于第二驱动阈值、大于所述第一驱动阈值且小于所述第二驱动阈值时，所述切线斜率分别对应大于所述设定斜率阈值、大于所述设定斜率阈值、小于所述设定斜率阈值；所述方法包括：
将所述显示面板上同一颜色的子像素划分为多组子像素组；
对于每一组所述子像素组，计算平均驱动信号，且判断所述平均驱动信号小于所述第一驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第一设定值；判断所述平均驱动信号大于所述第一驱动阈值且小于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号加上第三设定值；判断所述平均驱动信号大于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第五设定值；
利用调整后的所述驱动信号驱动相应的子像素。
上述显示面板的驱动方法及显示装置中，调整显示面板上各子像素的驱动信号的大小，使得调整后的驱动信号向设定区间靠近，其中，在设定区间内，亮度随驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值。因此，上述方法通过调整设置为驱动子像素的驱动信号的值，将范例会出现亮度饱和的驱动信号调整至曲线斜率较大的区间，从而可以加强大视角下亮度的对比度，改善了大视角的亮度饱和情况，减轻了washout现象。
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为范例显示面板子像素0度角和60度角亮度随驱动电压变化的曲线图；
图2为一实施方式提供的显示面板的驱动方法的流程图；
图3为图2所示实施方式的显示面板的驱动方法中步骤S100的其中一个实施例的流程图；
图4为图2所示实施方式的显示面板的驱动方法的一个实施例的显示面板上红色子像素的划分示意图；
图5为图4所示实施例的显示面板上红色子像素组的示意图；
图6为图3所示实施例中步骤S120的其中一个实施例的流程图；
图7为显示面板红色子像素亮度随驱动信号变化的曲线示意图；
图8为显示面板绿色子像素亮度随驱动信号变化的曲线示意图；
图9为显示面板蓝色子像素亮度随驱动信号变化的曲线示意图；
图10为另一实施方式提供的显示装置的框图。
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。
除非另有定义，本文所使用的所有的技术和科学术语与属于申请的技术领域的技术人员通常理解的含义相同。本文中在申请的说明书中所使用的术 语只是为了描述具体的实施例的目的，不是旨在限制本申请。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
图1示出了范例VA型液晶示面板亮度随驱动电压变化的曲线。其中，横坐标为驱动电压，纵坐标为亮度，实线为0°的曲线，虚线为60°的曲线。由图1可以看出，侧视角60°下各子像素亮度饱和(即曲线趋向平坦)的趋势快速增加，尤其是在中、低驱动电压下，亮度快速饱和，对比度下降，使得混合视角下观看图像时会呈现明显的washout现象(即画面偏白，亮度不能随着驱动电压呈线性变化)。
为了克服上述washout现象，一实施方式提供了一种显示面板的驱动方法，可以由驱动芯片来执行，并设置为驱动显示面板显示相应图像。其中，显示面板可以为TN(Twisted Nematic，扭曲向列)、OCB(Optically Compensated Birefringence，光学补偿弯曲排列)、VA(Vertical Alignment，垂直配向)型液晶显示面板、曲面型液晶显示面板或其他类型的显示面板，但并不限于此。
该显示面板的驱动方法包括以下内容，请参考图2。
步骤S100，调整显示面板上各子像素的驱动信号的大小，使得调整后的驱动信号向设定区间靠近。其中，在设定区间内，亮度随驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值。
其中，驱动信号例如为驱动芯片向显示面板提供的驱动电压。子像素可以为红色子像素、绿色子像素或蓝色子像素。在设定区间内，亮度随驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值，代表设定区间对应曲线的斜率较大，即亮度随驱动信号变化的程度较为明显具有较大的对比度，更接近线性变化的趋势。因此，该步骤中，可以将曲线较为平坦(即亮度趋向饱和)的区间内的驱动信号的大小进行调整，以使得调整后的驱动信号接近曲线斜率较大的区间，从而改善亮度饱和的情况。
步骤S200，利用调整后的驱动信号驱动相应的子像素。
驱动芯片向显示面板输入上述调整后的驱动信号，从而可以驱动相应的 子像素显示相应图像。
本实施方式提供的上述显示面板的驱动方法中，由于对驱动信号进行了优化分配，使得子像素的驱动信号可以调整至亮度低饱和甚至不会饱和的区间内，使得亮度随驱动信号更接近线性变化的趋势，从而能够改善大视角观看图像时会呈现的washout现象。
在其中一个实施例中，在显示面板侧视角下亮度随驱动信号变化的曲线中，当驱动信号分别小于第一驱动阈值、大于第二驱动阈值、大于第一驱动阈值且小于第二驱动阈值时，切线斜率分别对应大于设定斜率阈值、大于设定斜率阈值、小于设定斜率阈值。
如图7至图9所示，依次示出了红色子像素、绿色子像素、蓝色子像素的亮度在侧视角和正视角随驱动电压变化的曲线。图7中，RN、RM分别为红色子像素对应的上述第一驱动阈值、第二驱动阈值。RI区间和RIII区间内曲线的切线斜率都大于设定斜率阈值，RII区间内曲线的切线斜率小于设定斜率阈值，且RII区间内亮度呈饱和趋势。图8中，GN、GM分别为绿色子像素对应的上述第一驱动阈值、第二驱动阈值。GI区间和GIII区间内的切线斜率都大于设定斜率阈值，GII区间内曲线的切线斜率小于设定斜率阈值，且GII区间内亮度呈饱和趋势。图9中，BN、BM分别为蓝色子像素对应的上述第一驱动阈值、第二驱动阈值。BI区间和BIII区间内曲线的切线斜率都大于设定斜率阈值，BII区间内曲线的切线斜率小于设定斜率阈值，且BII区间内亮度呈饱和趋势。
并且，上述步骤S100为：调整大于第一驱动阈值且小于第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近。
换言之，如果驱动信号位于大于第一驱动阈值且小于第二驱动阈值的区间内，则将驱动信号的值减小以向小于第一驱动阈值的区间靠近，或者将驱动信号的值增大以向大于第二驱动阈值的区间靠近。仍然以图7所示的红色子像素为例，对于位于RII区间内的驱动信号来说，可以将该区间内位于左侧的驱动信号减去相应的值，从而进入或靠近RI区间；将该区间内位于右侧 的驱动信号增加相应的值，从而进入或靠近RIII区间内。因此，经过调整后，尽量使位于RII区间内的驱动信号位于或靠近RI区间及RIII区间，从而使得侧视角下亮度随驱动信号的变化趋向线性变化趋势。对于绿色子像素、蓝色子像素的信号处理原理与上述红色子像素的原理相同，这里就不再赘述。
具体地，上述步骤S100的具体实现方式包括以下内容，请参考图3。
步骤S110，将显示面板上同一颜色的子像素划分为多组子像素组。
具体地，可以将显示面上的红色子像素分为多组红色子像素组。将显示面板上的绿色子像素划分为多组绿色子像素组。将显示面板上的蓝色子像素划分为多组蓝色子像素组。接下来以红色子像素为例进行说明，请参考图4。将显示面板上的所有红色子像素共分为Z个红色子像素组(R1，R2，……，RZ)。请参考图5，每一个红色子像素组中包括多个红色子像素(即Rn_1,1，Rn_1,2，…Rn_i*j)。
步骤S120，对于每一组子像素组，调整大于第一驱动阈值且小于第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近。
其中，对于红色子像素组，可以按照图7所示的第一驱动阈值RN和第二驱动阈值RM进行驱动信号的调整。对于绿色子像素组，可以按照图8所示的第一驱动阈值GN和第二驱动阈值GM进行驱动信号的调整。对于蓝色子像素组，可以按照图9所示的第一驱动阈值BN和第二驱动阈值BM进行驱动信号的调整。
因此，本实施例中将显示面板的子像素划分为多个子像素组，便于对每一个子像素组独立进行信号处理的过程，可以有效处理局部子像素亮度的特性。另外，显示面板中子像素组的个数越多，信号处理的精度越高，从而使得显示的画面质量越好。子像素组的划分个数可以根据实际情况进行调整，从而可以扩大该方法的使用范围。
具体地，上述步骤S120具体包括以下内容，请参考图6。
步骤S121，对于每一组子像素组，计算平均驱动信号。
其中，平均驱动信号是指将子像素组内所有子像素的驱动信号相加然后 求平均得到的值。以红色子像素为例，即average_1＝Ave(Rn_1,1，Rn_1,2，…..，Rn_i*j)。因此，在每一组子像素组内，既有驱动信号大于平均驱动信号的部分子像素，又有驱动信号小于平均驱动信号的部分子像素。
步骤S122，判断平均驱动信号小于第一驱动阈值时，将大于平均驱动信号的各驱动信号减小第一设定值。
仍然以红色子像素为例，并且将各子像素按照驱动信号从大到小的顺序排列，即R1≥R2≥R3≥…..≥R_i*j(其中，R1，R2，…..，R_i*j代表在红色子像素组中的各子像素对应的驱动信号)。假设前k个子像素的驱动信号都大于平均驱动信号，则这k个子像素的驱动信号分别调整为：R’1＝R1-X1，R’2＝R2-X1，…..，R’k＝Rk-X1。其中，X1为第一设定值。R’1、R’2…..，R’k为调整后的k各驱动信号。
由图7可以看出，如果平均驱动信号小于第一驱动阈值RN，则该红色子像素组内大于平均驱动信号的各子像素，在驱动信号未调整前，大视角亮度饱和的情况较为严重(即部分子像素处于RII区间，或比较靠近RII区间)，本实施例中将这些子像素的驱动信号减去第一设定值，可以提升这些子像素的大视角亮度曲线的线性分辨率，从而加强大视角下这些子像素间亮度的对比度。
具体地，第一设定值，至少使得子像素组中最大的驱动信号减去第一设定值后得到的值小于第一驱动阈值。这时，通过对驱动信号的调整，可以使得该子像素组所有子像素的驱动信号都移动至RI区间内。另外，上述第一设定值的大小还可以根据不同显示面板的特性或同一显示面板不同的使用场景进行调整，进一步提高改善亮度饱和情况的有效性。
进一步地，上述步骤S120还包括：判断平均驱动信号小于第一驱动阈值时，将小于平均驱动信号的各驱动信号加上第二设定值。第二设定值为：
Rave_1＝＝k*X1/(n–k)
其中，Rave_1为第二设定值。k为子像素组中大于平均驱动信号的驱动信号对应子像素的个数。X1为第一设定值。n为子像素组中子像素的个数。
因此，在上述红色子像素组的示例中，除了前k个红色子像素外的其余子像素的驱动信号则分别调整为：R’(k+1)＝R(k+1)+Rave_1，R’(k+2)＝R(k+2)+Rave_1，…..，R’(i*j)＝R(i*j)+Rave_1。上述处理方式，可以使整个子像素组的亮度保持守恒。另外，由于小于平均驱动信号的各驱动信号加上第二设定值后，这些驱动信号仍然可以处于小于第一驱动阈值的区间内相对较低的位置，因此仍然可以确保大视角亮度曲线具有线性分辨的能力，不会影响视角观察信号的对比特性。
进一步地，上述步骤S120还包括：判断平均驱动信号大于第一驱动阈值且小于第二驱动阈值时，将大于平均驱动信号的各驱动信号加上第三设定值。
仍然以红色子像素为例，并且将各子像素按照驱动信号从大到小的顺序排列，即R1≥R2≥R3≥…..≥R_i*j(其中，R1，R2，…..，R_i*j代表在红色子像素组中的各子像素对应的驱动信号)。假设前k个子像素的驱动信号大于平均驱动信号，则这k个子像素的驱动信号分别调整为：R’1＝R1+X2，R’2＝R2+X2，…..，R’k＝Rk+X2。其中，X2为第三设定值。R’1，R’2，…..，R’k分别为前k个调整后的驱动信号。
由图7可以看出，如果平均驱动信号大于第一驱动阈值RN且小于第二驱动阈值RM，则该红色子像素组内大于平均驱动信号的各子像素，在驱动信号未调整前，大视角亮度饱和的情况较为严重(即部分子像素处于RII区间，或比较靠近RII区间)。因此，本实施例中将这些子像素的驱动信号加上第二设定值，可以使得这些子像素的驱动信号调整至RIII区间，或更靠近RIII区间，使得大视角亮度曲线的线性分辨率加强，从而加强大视角下这些子像素间亮度的对比度。
具体地，第二设定值，至少使得子像素组中大于平均驱动信号的各驱动信号中最小的驱动信号加上第三设定值后得到的值大于第二驱动阈值。这时，通过对驱动信号的调整，可以使得该子像素组所有大于平均驱动信号的子像素的驱动信号都移动至RIII区间。另外，上述第三设定值的大小还可以根据不同显示面板的不同特性或同一显示面板不同的使用场景进行调整，进一步 提高亮度饱和改善的有效性。
进一步地，上述步骤S120还包括：判断平均驱动信号大于第一驱动阈值且小于第二驱动阈值时，将小于平均驱动信号的各驱动信号减去第四设定值。第四设定值为：
Rave_2＝k*X2/(n–k)
其中，Rave_2为第四设定值。k为子像素组中大于平均驱动信号的驱动信号对应子像素的个数。X2为上述第三设定值。n为子像素组中子像素的个数。
在上述红色子像素组的示例中，除了前k个红色子像素外的其余的子像素的驱动信号则分别调整为：R’(k+1)＝R(k+1)-Rave_2，R’(k+2)＝R(k+2)-Rave_2，…..，R’(i*j)＝R(i*j)-Rave_2。其中，R’(k+1)，R’(k+2)…..，R’(i*j)为调整后的驱动信号。上述处理方式，可以使得在整个子像素组的亮度保持守恒。
由图7可以看出，如果平均驱动信号大于第一驱动阈值RN且小于第二驱动阈值RM，则该红色子像素组内小于平均驱动信号的各子像素，在驱动信号未调整前，大视角亮度饱和的情况较为严重(即部分子像素处于RII区间，或比较靠近RII区间)。因此，本实施例中将这些子像素的驱动信号减去第四设定值，可以使得这些子像素的驱动信号调整至RI区间，或更靠近RI区间，使得大视角亮度曲线的线性分辨率加强，从而加强大视角下这些子像素间驱动信号的对比度，提升大视角亮度曲线具有的线性分辨的能力。
进一步地，上述步骤S120还包括：判断平均驱动信号大于第二驱动阈值时，将大于平均驱动信号的各驱动信号减去第五设定值。
仍然以红色子像素为例，并且将各子像素按照驱动信号从大到小的顺序排列，即R1≥R2≥R3≥…..≥R_i*j(其中，R1，R2，…..，R_i*j代表在红色子像素组中的各子像素对应的驱动信号)。假设前k个子像素的驱动信号大于平均驱动信号，则这k个子像素的驱动信号分别调整为：R’1＝R1-X3，R’2＝R2-X3，…..，R’k＝Rk-X3。其中，X3为第五设定值。R’1，R’2，…..，R’k 为前k个调整后的驱动信号。
由图7可以看出，如果平均驱动信号大于第二驱动阈值RM，则该红色子像素组内大于平均驱动信号的各子像素的驱动信号，减去第五设定值后使得亮度更接近线性变化的趋势，而且仍然可以处于高驱动信号的区域，可以使得这些子像素的大视角亮度曲线具有较强的线性分辨率，从而加强大视角下这些子像素间亮度的对比度。
进一步地，上述步骤S120还包括：判断平均驱动信号大于第二驱动阈值时，将小于平均驱动信号的各驱动信号加上第六设定值。第六设定值为：
Rave_3＝k*X3/(n–k)
其中，Rave_3为第六设定值。k为子像素组中大于平均驱动信号的驱动信号对应子像素的个数。X3为第五设定值。n为子像素组中子像素的个数。
在上述红色子像素组的示例中，除了前k个红色子像素外其余的子像素的驱动信号则分别调整为：R’(k+1)＝R(k+1)+Rave_3，R’(k+2)＝R(k+2)+Rave_3，…..，R’(i*j)＝R(i*j)+Rave_3。其中，R’(k+1)，R’(k+2)…..，R’(i*j)为调整后的驱动信号。上述处理方式，可以使得子像素组的亮度保持守恒。另外，由于上述小于平均驱动信号的各驱动信号加上第六设定值后，仍然可以处于RIII区间或大于第一驱动阈值且小于第二驱动阈值的区间内相对较高的位置(例如RII区间内较高的位置)，因此可以确保大视角亮度曲线具有线性分辨的能力，从而加强大视角下这些子像素间亮度的对比度。
需要说明的是，图2、图3及图6为本申请实施例的方法的流程示意图。应该理解的是，虽然图2、图3及图6的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，其可以以其他的顺序执行。而且，图2、图3及图6中的至少一部分步骤可以包括多个子步骤或者多个阶段，这些子步骤或者阶段并不必然是在同一时刻执行完成，而是可以在不同的时刻执行，其执行顺序也不必然是依次进行，而是可以与其他步骤或者其他步骤的子步骤或者阶段的至少一部分轮流或者交替地执 行。
另一实施方式提供了一种显示装置，请参考图10，包括驱动芯片110及显示面板120。所述驱动芯片110设置为调整显示面板120上各子像素的驱动信号的大小，使得调整后的驱动信号向设定区间靠近，并利用调整后的所述驱动信号驱动所述显示面板120上相应的子像素。其中，在所述设定区间内，亮度随所述驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值。
在其中一个实施例中，在所述显示面板120侧视角下亮度随所述驱动信号变化的曲线中，当所述驱动信号分别小于第一驱动阈值、大于第二驱动阈值、大于所述第一驱动阈值且小于所述第二驱动阈值时，所述切线斜率分别对应大于所述设定斜率阈值、大于所述设定斜率阈值、小于所述设定斜率阈值；
并且，所述驱动芯片110具体设置为调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近。
在其中一个实施例中，所述驱动芯片110具体设置为将所述显示面板120上同一颜色的子像素划分为多组子像素组，且对于每一组所述子像素组，所述驱动芯片110具体设置为调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近。
在其中一个实施例中，所述驱动芯片110具体设置为对于每一组所述子像素组，计算平均驱动信号，且判断所述平均驱动信号小于所述第一驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第一设定值。
在其中一个实施例中，所述第一设定值需满足的条件为：所述第一设定值至少使得子像素组中最大的驱动信号减去所述第一设定值后得到的值小于所述第一驱动阈值。
在其中一个实施例中，所述驱动芯片110具体设置为判断所述平均驱动信号小于所述第一驱动阈值时，将小于所述平均驱动信号的各驱动信号加上第二设定值；所述第二设定值为：
Rave_1＝k*X1/(n–k)
其中，Rave_1为所述第二设定值；k为所述子像素组中大于所述平均驱动信号的驱动信号对应子像素的个数；X1为所述第一设定值；n为所述子像素组中子像素的个数。
在其中一个实施例中，所述驱动芯片110具体设置为判断所述平均驱动信号大于所述第一驱动阈值且小于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号加上第三设定值。
在其中一个实施例中，所述驱动芯片110具体设置为判断所述平均驱动信号大于所述第一驱动阈值且小于所述第二驱动阈值时，将小于所述平均驱动信号的各驱动信号减去第四设定值；所述第四设定值为：
Rave_2＝k*X2/(n–k)
其中，Rave_2为所述第四设定值；k为所述子像素组中大于所述平均驱动信号的驱动信号对应子像素的个数；X2为所述第三设定值；n为所述子像素组中子像素的个数。
在其中一个实施例中，所述驱动芯片110具体设置为判断所述平均驱动信号大于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第五设定值。
需要说明的是，本实施方式提供的显示装置的驱动芯片110执行的功能与上述实施方式提供的显示面板的驱动方法的原理相同，这里就不再赘述。
需要说明的是，显示装置例如为LCD(Liquid Crystal Display)显示装置、OLED(Organic Light-Emitting Diode)显示装置、QLED(Quantum Dot Light Emitting Diodes)显示装置、曲面显示装置或其他显示装置。
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 (20)

  1. 一种显示面板的驱动方法，包括：
    调整显示面板上各子像素的驱动信号的大小，使得调整后的驱动信号向设定区间靠近；在所述设定区间内，亮度随所述驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值；及
    利用调整后的所述驱动信号驱动相应的子像素。
  2. 根据权利要求1所述的方法，其中，在所述显示面板侧视角下亮度随所述驱动信号变化的曲线中，当所述驱动信号分别小于第一驱动阈值、大于第二驱动阈值、大于所述第一驱动阈值且小于所述第二驱动阈值时，所述切线斜率分别对应大于所述设定斜率阈值、大于所述设定斜率阈值、小于所述设定斜率阈值；
    并且，所述调整显示面板上各子像素的驱动信号的大小，使得调整后的驱动信号向设定区间靠近的步骤为：
    调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近。
  3. 根据权利要求2所述的方法，其中，所述调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近的步骤包括：
    将所述显示面板上同一颜色的子像素划分为多组子像素组；及
    对于每一组所述子像素组，调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近。
  4. 根据权利要求3所述的方法，其中，所述对于每一组所述子像素组，调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近的步骤包括：
    对于每一组所述子像素组，计算平均驱动信号；及
    判断所述平均驱动信号小于所述第一驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第一设定值。
  5. 根据权利要求4所述的方法，所述第一设定值需满足的条件为：所述第一设定值至少使得子像素组中最大的驱动信号减去所述第一设定值后得到的值小于所述第一驱动阈值。
  6. 根据权利要求4所述的方法，其中，所述对于每一组所述子像素组，调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近的步骤还包括：
    判断所述平均驱动信号小于所述第一驱动阈值时，将小于所述平均驱动信号的各驱动信号加上第二设定值；所述第二设定值为：
    Rave_1＝k*X1/(n–k)
    其中，Rave_1为所述第二设定值；k为所述子像素组中大于所述平均驱动信号的驱动信号对应子像素的个数；X1为所述第一设定值；n为所述子像素组中子像素的个数。
  7. 根据权利要求4所述的方法，其中，所述对于每一组所述子像素组，调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近的步骤还包括：
    判断所述平均驱动信号大于所述第一驱动阈值且小于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号加上第三设定值。
  8. 根据权利要求7所述的方法，其中，所述对于每一组所述子像素组，调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近的步骤还包括：
    判断所述平均驱动信号大于所述第一驱动阈值且小于所述第二驱动阈值时，将小于所述平均驱动信号的各驱动信号减去第四设定值；所述第四设定值为：
    Rave_2＝k*X2/(n–k)
    其中，Rave_2为所述第四设定值；k为所述子像素组中大于所述平均驱动信号的驱动信号对应子像素的个数；X2为所述第三设定值；n为所述子像素组中子像素的个数。
  9. 根据权利要求4所述的方法，其中，所述对于每一组所述子像素组，调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近的步骤还包括：
    判断所述平均驱动信号大于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第五设定值。
  10. 根据权利要求9所述的方法，其中，所述对于每一组所述子像素组，调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近的步骤还包括：
    判断所述平均驱动信号大于所述第二驱动阈值时，将小于所述平均驱动信号的各驱动信号加上第六设定值；所述第六设定值为：
    Rave_3＝k*X3/(n–k)
    其中，Rave_3为所述第六设定值；k为所述子像素组中大于所述平均驱动信号的驱动信号对应子像素的个数；X3为所述第五设定值；n为所述子像素组中子像素的个数。
  11. 一种显示装置，包括：
    显示面板；及
    驱动芯片，所述驱动芯片设置为调整显示面板上各子像素的驱动信号的大小，使得调整后的驱动信号向设定区间靠近，并利用调整后的所述驱动信号驱动所述显示面板上相应的子像素；其中，在所述设定区间内，亮度随所述驱动信号变化的曲线上各点的切线斜率大于设定斜率阈值。
  12. 根据权利要求11所述的显示装置，其中，在所述显示面板侧视角下亮度随所述驱动信号变化的曲线中，当所述驱动信号分别小于第一驱动阈值、大于第二驱动阈值、大于所述第一驱动阈值且小于所述第二驱动阈值时，所述切线斜率分别对应大于所述设定斜率阈值、大于所述设定斜率阈值、小于所述设定斜率阈值；
    并且，所述驱动芯片具体设置为调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠 近。
  13. 根据权利要求12所述的显示装置，其中，所述驱动芯片具体设置为将所述显示面板上同一颜色的子像素划分为多组子像素组，且对于每一组所述子像素组，所述驱动芯片具体设置为调整大于所述第一驱动阈值且小于所述第二驱动阈值的驱动信号向小于第一驱动阈值或大于第二驱动阈值的区间靠近。
  14. 根据权利要求13所述的显示装置，其中，所述驱动芯片具体设置为对于每一组所述子像素组，计算平均驱动信号，且判断所述平均驱动信号小于所述第一驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第一设定值。
  15. 根据权利要求14所述的显示装置，其中，所述第一设定值需满足的条件为：所述第一设定值至少使得子像素组中最大的驱动信号减去所述第一设定值后得到的值小于所述第一驱动阈值。
  16. 根据权利要求14所述的显示装置，其中，所述驱动芯片具体设置为判断所述平均驱动信号小于所述第一驱动阈值时，将小于所述平均驱动信号的各驱动信号加上第二设定值；所述第二设定值为：
    Rave_1＝k*X1/(n–k)
    其中，Rave_1为所述第二设定值；k为所述子像素组中大于所述平均驱动信号的驱动信号对应子像素的个数；X1为所述第一设定值；n为所述子像素组中子像素的个数。
  17. 根据权利要求14所述的显示装置，其中，所述驱动芯片具体设置为判断所述平均驱动信号大于所述第一驱动阈值且小于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号加上第三设定值。
  18. 根据权利要求17所述的显示装置，其中，所述驱动芯片具体设置为判断所述平均驱动信号大于所述第一驱动阈值且小于所述第二驱动阈值时，将小于所述平均驱动信号的各驱动信号减去第四设定值；所述第四设定值为：
    Rave_2＝k*X2/(n–k)
    其中，Rave_2为所述第四设定值；k为所述子像素组中大于所述平均驱动信号的驱动信号对应子像素的个数；X2为所述第三设定值；n为所述子像素组中子像素的个数。
  19. 根据权利要求14所述的显示装置，其中，所述驱动芯片具体设置为判断所述平均驱动信号大于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第五设定值。
  20. 一种显示面板的驱动方法，在所述显示面板侧视角下亮度随所述驱动信号变化的曲线中，当所述驱动信号分别小于第一驱动阈值、大于第二驱动阈值、大于所述第一驱动阈值且小于所述第二驱动阈值时，所述切线斜率分别对应大于所述设定斜率阈值、大于所述设定斜率阈值、小于所述设定斜率阈值；所述方法包括：
    将所述显示面板上同一颜色的子像素划分为多组子像素组；
    对于每一组所述子像素组，计算平均驱动信号，且判断所述平均驱动信号小于所述第一驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第一设定值；判断所述平均驱动信号大于所述第一驱动阈值且小于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号加上第三设定值；判断所述平均驱动信号大于所述第二驱动阈值时，将大于所述平均驱动信号的各驱动信号减去第五设定值；
    利用调整后的所述驱动信号驱动相应的子像素。
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