CN113077742A - Adjusting method and adjusting device of display panel and display panel - Google Patents

Adjusting method and adjusting device of display panel and display panel Download PDF

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CN113077742A
CN113077742A CN202110283871.9A CN202110283871A CN113077742A CN 113077742 A CN113077742 A CN 113077742A CN 202110283871 A CN202110283871 A CN 202110283871A CN 113077742 A CN113077742 A CN 113077742A
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view
value
low gray
chromaticity
gray level
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CN113077742B (en
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陈杰
何涛
张永雷
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TCL Huaxing Photoelectric Technology Co Ltd
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TCL Huaxing Photoelectric Technology 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
    • G09G3/2003—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
    • G09G3/2007—Display of intermediate tones
    • 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
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • 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
    • G09G2320/0693—Calibration of display systems

Abstract

The embodiment of the invention discloses a display panel adjusting method and device and a display panel. The adjusting method of the display panel comprises the following steps: acquiring brightness data and color coordinate data of a display panel; obtaining a high-low gray scale value combination corresponding to the original gray scale value of the display panel at least under the first picture; adjusting the high and low gray level value combination, and calculating a front-view brightness deviation value and a front-view and side-view chromaticity deviation value between the original gray level value and the high and low gray level value combination; when the front-view brightness deviation value is smaller than a first threshold value and the front-view and side-view chroma deviation value is smaller than a second threshold value, combining high and low gray level values into qualified parameters; otherwise, the high and low gray scale value combination is adjusted to meet the conditions. In the embodiment of the invention, the chroma value parameter is newly added, and the high-low gray level value combination is adjusted, so that the front-side brightness deviation value is smaller than the first threshold value and the front-side chroma deviation value is smaller than the second threshold value, the color cast of a large visual angle is further reduced, and the display effect of the large visual angle is improved.

Description

Adjusting method and adjusting device of display panel and display panel
Technical Field
The invention relates to the field of display, in particular to a display panel adjusting method, a display panel adjusting device and a display panel.
Background
In recent years, with the increasing demand of people on display panels, how to improve the color shift of the display panel under the side viewing condition is a great development direction to improve the viewing effect under the side viewing condition.
At present, when a viewing angle compensation debugging method based on a luminance parameter adjusts front-side view chromaticity deviation values of 9 seich test pictures (CESI chromaticity visual angle test pictures) to be minimum according to a luminance coordinate parameter, the side view viewing angle of a display panel still has the technical problem of color cast.
Therefore, a method and an apparatus for adjusting a display panel and a display panel are needed to solve the above technical problems.
Disclosure of Invention
The embodiment of the invention provides a display panel adjusting method, a display panel adjusting device and a display panel, which can solve the technical problem that the side viewing angle of the display panel still has color cast.
The embodiment of the invention provides a method for adjusting a display panel, which comprises the following steps:
acquiring side-looking brightness data, side-looking color coordinate data, front-looking brightness data and front-looking color coordinate data of a first position of a display panel under each gray scale;
according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, obtaining a high-low gray-scale value combination corresponding to an original gray-scale value of the display panel at least under a first picture, a first front-view brightness coordinate corresponding to the original gray-scale value, a first front-view chromaticity coordinate corresponding to the original gray-scale value, a first side-view chromaticity coordinate corresponding to the original gray-scale value, a second front-view brightness coordinate corresponding to the high-low gray-scale value combination, a second front-view chromaticity coordinate corresponding to the high-low gray-scale value combination and a second side-view chromaticity coordinate corresponding to the high-low gray-scale value combination;
calculating a front-view brightness deviation value between the combination of the original gray level value and the high and low gray level values according to the first front-view brightness coordinate and the second front-view brightness coordinate;
calculating a front-side view chromaticity deviation value between the original gray level value and the high-low gray level value combination according to the first front-view chromaticity coordinate, the first side-view chromaticity coordinate, the second front-view chromaticity coordinate and the second side-view chromaticity coordinate;
when the front-view brightness deviation value is smaller than a first threshold value and the front-view and side-view chroma deviation value is smaller than a second threshold value, combining the high and low gray level values into qualified parameters; otherwise, adjusting the high-low gray level value combination to make the front-view brightness deviation value smaller than the first threshold value and the front-side view chroma deviation value smaller than the second threshold value.
In an embodiment, the step of obtaining, according to the side view luminance data, the side view color coordinate data, the front view luminance data, and the front view color coordinate data, a high-low gray level value combination corresponding to an original gray level value, a first front view luminance coordinate corresponding to the original gray level value, a first front view chromaticity coordinate corresponding to the original gray level value, a first side view chromaticity coordinate corresponding to the original gray level value, a second front view luminance coordinate corresponding to the high-low gray level value combination, a second front view chromaticity coordinate corresponding to the high-low gray level value combination, and a second side view chromaticity coordinate corresponding to the high-low gray level value combination of the display panel at least on a first screen includes: the first picture is a red picture, and according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, a red high-low gray-scale value combination corresponding to a red original gray-scale value of the display panel under the red picture, a first red front-view brightness coordinate corresponding to the red original gray-scale value, a first red front-view chromaticity coordinate corresponding to the red original gray-scale value, a first red side-view chromaticity coordinate corresponding to the red original gray-scale value, a second red front-view brightness coordinate corresponding to the red high-low gray-scale value combination, a second red front-view chromaticity coordinate corresponding to the red high-low gray-scale value combination and a second red side-view chromaticity coordinate corresponding to the red high-low gray-scale value combination are obtained; when a second picture is taken, the second picture is a blue picture, and according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, a blue high-low gray level value combination corresponding to a blue original gray level value, a first blue front-view brightness coordinate corresponding to the blue original gray level value, a first blue front-view chromaticity coordinate corresponding to the blue original gray level value, a first blue side-view chromaticity coordinate corresponding to the blue original gray level value, a second blue front-view brightness coordinate corresponding to the blue high-low gray level value combination, a second blue front-view chromaticity coordinate corresponding to the blue high-low gray level value combination and a second blue side-view chromaticity coordinate corresponding to the blue high-low gray level value combination of the display panel under the blue picture are obtained; the front-view brightness deviation value comprises a red front-view brightness deviation value and a blue front-view brightness deviation value, the front-side view chromaticity deviation value comprises a red front-side view chromaticity deviation value and a blue front-side view chromaticity deviation value, and when the red front-view brightness deviation value is smaller than the first threshold value and the red front-side view chromaticity deviation value is smaller than the second threshold value, the red high-low gray level value combination is a qualified parameter; when the blue front-view brightness deviation value is smaller than the first threshold value and the blue front-side view chromaticity deviation value is smaller than the second threshold value, the blue high-low gray level value combination is a qualified parameter; otherwise, adjusting the corresponding high-low gray scale value combination.
In an embodiment, the step of obtaining, according to the side view luminance data, the side view color coordinate data, the front view luminance data, and the front view color coordinate data, a high-low gray level value combination corresponding to an original gray level value, a first front view luminance coordinate corresponding to the original gray level value, a first front view chromaticity coordinate corresponding to the original gray level value, a first side view chromaticity coordinate corresponding to the original gray level value, a second front view luminance coordinate corresponding to the high-low gray level value combination, a second front view chromaticity coordinate corresponding to the high-low gray level value combination, and a second side view chromaticity coordinate corresponding to the high-low gray level value combination of the display panel at least on a first screen includes: obtaining a high-low gray level value combination corresponding to an original gray level value, a first front-view XYZ luminance coordinate corresponding to the original gray level value, a first front-view XYZ chromaticity coordinate corresponding to the original gray level value, a first side-view XYZ chromaticity coordinate corresponding to the original gray level value, a second front-view XYZ luminance coordinate corresponding to the high-low gray level value combination, a second front-view XYZ chromaticity coordinate corresponding to the high-low gray level value combination, and a second side-view XYZ color XYZ corresponding to the high-low gray level value combination at least under a first picture of the display panel according to the side-view luminance data, the side-view color coordinate data, the front-view luminance data, and the front-view color coordinate dataDegree coordinates; converting the first front view XYZ luminance coordinates into a first front view L*u*v*Luminance coordinates as the first front-view luminance coordinates, and the first front-view XYZ chromaticity coordinates are converted into a first front-view L*u*v*The chromaticity coordinate is taken as the first front-view chromaticity coordinate, and the first side-view XYZ chromaticity coordinate is converted into a first side-view L*u*v*Chromaticity coordinates are taken as the first side-view chromaticity coordinates, and the second front-view XYZ luminance coordinates are converted into a second front-view L*u*v*Luminance coordinates as the second front-view luminance coordinates, and the second front-view XYZ chromaticity coordinates are converted into the second front-view L*u*v*Chromaticity coordinates as the second front-view chromaticity coordinates, and the second side-view XYZ chromaticity coordinates are converted into the second side-view L*u*v*And the chromaticity coordinate is taken as the second side-view chromaticity coordinate.
In one embodiment, the formula of the front-side view chromaticity deviation value is as follows:
Figure BDA0002979613130000031
wherein Δ E represents the side view chromaticity deviation value, Δ u*Represents the first front view L*u*v*Chromaticity coordinates and the second front view L*u*v*Difference in chromaticity coordinates, Δ v*Represents the first side view L*u*v*Chromaticity coordinates and the second side view L*u*v*Difference in chromaticity coordinates.
In an embodiment, the method for adjusting the display panel further includes: according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, obtaining a third high-low gray scale value combination corresponding to a third original gray scale value of the display panel under a third picture, a third front-view brightness coordinate corresponding to the third original gray scale value and a fourth front-view brightness coordinate corresponding to the third high-low gray scale value combination; calculating a third front-view brightness deviation value between the third original gray level value and the third high-low gray level value combination according to the third front-view brightness coordinate and the fourth front-view brightness coordinate; when the third front-view brightness deviation value is smaller than a third threshold value, the third high-low gray level value combination is a qualified parameter; otherwise, adjusting the third high-low gray level value combination to enable the third front-view brightness deviation value to be smaller than a third threshold value.
In an embodiment, when an absolute value of a difference between the third original gray-scale value of the third picture and a red original gray-scale value of a red picture is smaller than a fourth threshold, or when an absolute value of a difference between the third original gray-scale value of the third picture and a blue original gray-scale value of a blue picture is smaller than a fifth threshold, the method for adjusting the display panel further includes: obtaining a first normalized luminance coordinate of a lower side view angle of the third picture according to the third high-low gray scale value combination; obtaining a plurality of first normalized luminance coordinates according to a third high-low gray scale value combination of a plurality of third pictures, taking a third original gray scale value corresponding to the third picture as an abscissa, taking the first normalized luminance coordinates as an ordinate, and obtaining a first curve, wherein when the smoothness of the first curve is smaller than a sixth threshold, the third high-low gray scale value combination is a qualified parameter; otherwise, adjusting the third high-low gray scale value combination so that the smoothness of the first curve is less than a sixth threshold value.
In one embodiment, the high-low gray level value combination comprises a red component high-low gray level value set, a green component high-low gray level value set and a blue component high-low gray level value set; and the red component high-low gray level value set, the green component high-low gray level value set and the blue component high-low gray level value set are respectively and independently adjusted.
In one embodiment, the first measurement positions of the front brightness data and the front color coordinate data are measured in a direction perpendicular to the display panel and passing through the first positions, and the second measurement positions of the side brightness data and the side color coordinate data are measured in a direction having an acute angle greater than or equal to 30 ° with the display panel and passing through the first positions.
The embodiment of the invention also provides a regulating device of the display panel, which comprises a memory and a controller, wherein the memory stores a plurality of instructions, and the controller executes the plurality of instructions to execute the steps in any one of the regulating methods of the display panel.
The embodiment of the invention also provides a display panel, and the display panel is obtained by adjusting any one of the display panel adjusting methods.
In the embodiment of the invention, the chroma value parameter is newly added, and the high-low gray level value combination is adjusted, so that the front-side brightness deviation value is smaller than the first threshold value and the front-side chroma deviation value is smaller than the second threshold value, the color cast of a large visual angle is further reduced, and the display effect of the large visual angle is improved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart illustrating steps of a method for adjusting a display panel according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating measured data in a method for adjusting a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic side view illustrating an adjusting method of a display panel according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of an adjusting apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
At present, when a viewing angle compensation debugging method based on a luminance parameter adjusts front-side view chromaticity deviation values of 9 seich test pictures (CESI chromaticity visual angle test pictures) to be minimum according to a luminance coordinate parameter, the side view viewing angle of a display panel still has the technical problem of color cast.
According to the embodiment of the invention, the combination of the high gray level value and the low gray level value is adjusted through the judgment of the newly added chromatic value parameters, so that the front-side brightness deviation value is smaller than the first threshold value and the front-side chromaticity deviation value is smaller than the second threshold value, the color cast of a large visual angle is further reduced, and the display effect of the large visual angle is improved.
Referring to fig. 1 to fig. 3, an embodiment of the invention discloses a method for adjusting a display panel, including:
s100, acquiring side-view brightness data, side-view color coordinate data, front-view brightness data and front-view color coordinate data of a first position of a display panel under each gray scale;
s200, according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, obtaining a high-low gray-scale value combination corresponding to an original gray-scale value of the display panel at least under a first picture, a first front-view brightness coordinate corresponding to the original gray-scale value, a first front-view chromaticity coordinate corresponding to the original gray-scale value, a first side-view chromaticity coordinate corresponding to the original gray-scale value, a second front-view brightness coordinate corresponding to the high-low gray-scale value combination, a second front-view chromaticity coordinate corresponding to the high-low gray-scale value combination and a second side-view chromaticity coordinate corresponding to the high-low gray-scale value combination;
s300, calculating a front-view brightness deviation value between the combination of the original gray level value and the high-low gray level value according to the first front-view brightness coordinate and the second front-view brightness coordinate;
s400, calculating a front-side view chromaticity deviation value between the original gray level value and the high-low gray level value according to the first front-view chromaticity coordinate, the first side-view chromaticity coordinate, the second front-view chromaticity coordinate and the second side-view chromaticity coordinate;
s500, when the front-view brightness deviation value is smaller than a first threshold value and the front-side view chromaticity deviation value is smaller than a second threshold value, combining the high and low gray scale values into qualified parameters; otherwise, adjusting the high-low gray level value combination to make the front-view brightness deviation value smaller than the first threshold value and the front-side view chroma deviation value smaller than the second threshold value.
In the embodiment of the invention, the chroma value parameter is newly added, and the high-low gray level value combination is adjusted, so that the front-side brightness deviation value is smaller than the first threshold value and the front-side chroma deviation value is smaller than the second threshold value, the color cast of a large visual angle is further reduced, and the display effect of the large visual angle is improved.
The technical solution of the present invention will now be described with reference to specific embodiments.
The adjusting method of the display panel comprises the following steps:
s100, acquiring side-view brightness data, side-view color coordinate data, front-view brightness data and front-view color coordinate data of a first position of the display panel under each gray scale.
In this embodiment, the first position is a pixel point formed by three red, green and blue sub-pixels.
In this embodiment, when the color depth of the display panel is 8bits, each gray scale is 256 gray scales of 0 to 255. The luminance data comprises luminance gray-scale values (front view and side view) corresponding to three sub-pixels of 0-255 gray-scale red, green and blue.
In this embodiment, the first measurement positions of the front brightness data and the front color coordinate data are measured in a direction perpendicular to the display panel and passing through the first positions, and the second measurement positions of the side brightness data and the side color coordinate data are measured in a direction that an acute angle included angle with the display panel is greater than or equal to 30 ° and that passing through the first positions. The corresponding unilateral angle θ is 60 degrees, wherein the first measurement position and the second measurement position are represented by a measurement device T instead, please refer to fig. 3 specifically.
In this embodiment, when the average front-side-view color difference of 9 frames is found to be 0.020 through experiments according to the test data of the 9 seey frames, the sum of the left and right angles of the display panel is the horizontal seey viewing angle, that is, the corresponding single-side angle θ is 60 degrees.
S200, according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, obtaining a high-low gray-scale value combination corresponding to an original gray-scale value of the display panel at least under a first picture, a first front-view brightness coordinate corresponding to the original gray-scale value, a first front-view chromaticity coordinate corresponding to the original gray-scale value, a first side-view chromaticity coordinate corresponding to the original gray-scale value, a second front-view brightness coordinate corresponding to the high-low gray-scale value combination, a second front-view chromaticity coordinate corresponding to the high-low gray-scale value combination and a second side-view chromaticity coordinate corresponding to the high-low gray-scale value combination.
In this embodiment, R/G/B gray scale values corresponding to the 9 characteristic color images of the seixi test are as follows, where R represents a red component, G represents a green component, and B represents a blue component. Red pictures are R166, G62, B68; the blue picture is R64, G69 and B145; the dark skin color picture is R115, G87 and B74; the skin color picture is R183, G145 and B128; the green picture is R-76, G-143 and B-79; the yellow picture is R & lt214 & gt, G & lt187 & gt, B & lt43 & gt; the magenta picture is R177, G690 and B143; cyan picture R23, G130, B154; the gray picture is R121, G121, and B120.
In this embodiment, the method for adjusting the display panel includes adjusting the first frame and the second frame, and the step S200 includes:
s210, the first picture is a red picture, and according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, a red high-low gray-scale value combination corresponding to a red original gray-scale value of the display panel under the red picture, a first red front-view brightness coordinate corresponding to the red original gray-scale value, a first red front-view chromaticity coordinate corresponding to the red original gray-scale value, a first red side-view chromaticity coordinate corresponding to the red original gray-scale value, a second red front-view brightness coordinate corresponding to the red high-low gray-scale value combination, a second red front-view chromaticity coordinate corresponding to the red high-low gray-scale value combination and a second red side-view chromaticity coordinate corresponding to the red high-low gray-scale value combination are obtained.
And S220, when a second picture is taken, the second picture is a blue picture, and according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, a blue high-low gray level value combination corresponding to a blue original gray level value, a first blue front-view brightness coordinate corresponding to the blue original gray level value, a first blue front-view chromaticity coordinate corresponding to the blue original gray level value, a first blue side-view chromaticity coordinate corresponding to the blue original gray level value, a second blue front-view brightness coordinate corresponding to the blue high-low gray level value combination, a second blue front-view chromaticity coordinate corresponding to the blue high-low gray level value combination and a second blue side-view chromaticity coordinate corresponding to the blue high-low gray level value combination of the display panel under the blue picture are obtained.
In this embodiment, the front-view luminance deviation value includes a red front-view luminance deviation value and a blue front-view luminance deviation value, the front-side view chrominance deviation value includes a red front-side view chrominance deviation value and a blue front-side view chrominance deviation value, and the red high-low gray level value combination is a pass parameter when the red front-view luminance deviation value is smaller than the first threshold value and the red front-side view chrominance deviation value is smaller than the second threshold value; when the blue front-view brightness deviation value is smaller than the first threshold value and the blue front-side view chromaticity deviation value is smaller than the second threshold value, the blue high-low gray level value combination is a qualified parameter; otherwise, adjusting the corresponding high-low gray scale value combination.
In this embodiment, the principle of obtaining the high-low gray scale value combination corresponding to the original gray scale value of the display panel at least under the first screen according to the side-view luminance data, the side-view color coordinate data, the front-view luminance data and the front-view color coordinate data is to replace the original gray scale value with two relatively high (H) and relatively low (L) gray scales, so as to ensure that the relationship between the front-view luminance and the gray scale is not changed, i.e., (luminance of H + luminance of L)/2 is equal to the luminance of the original gray scale. For example: the 48 gray levels are replaced by H60 and L8.
In this embodiment, the high-low gray level value combination includes a red component high-low gray level value set, a green component high-low gray level value set, and a blue component high-low gray level value set. And the red component high-low gray scale value set, the green component high-low gray scale value set and the blue component high-low gray scale value set are respectively and independently adjusted, namely the R/G/B component corresponds to the display parameters of the red, green and blue sub-pixels.
In the present embodiment, H represents a relatively high gray level, and L represents a relatively low gray level.
In this embodiment, the red component high and low gray value groups correspond to obtain a first front-view red component H luminance coordinate, a first front-view red component H chromaticity coordinate, a second front-view red component H chromaticity coordinate, a first front-view red component L luminance coordinate, a first front-view red component L chromaticity coordinate, a second front-view red component L chromaticity coordinate, a first side-view red component H luminance coordinate, a first side-view red component H chromaticity coordinate, a second side-view red component H chromaticity coordinate, a first side-view red component L luminance coordinate, a first side-view red component L chromaticity coordinate, and a second side-view red component L chromaticity coordinate.
In this embodiment, the green component high and low gray value groups correspond to obtain a first front view green component H luminance coordinate, a first front view green component H chromaticity coordinate, a second front view green component H chromaticity coordinate, a first front view green component L luminance coordinate, a first front view green component L chromaticity coordinate, a second front view green component L chromaticity coordinate, a first side view green component H luminance coordinate, a first side view green component H chromaticity coordinate, a second side view green component H chromaticity coordinate, a first side view green component L luminance coordinate, a first side view green component L chromaticity coordinate, and a second side view green component L chromaticity coordinate.
In this embodiment, the blue component high and low gray value groups correspondingly obtain a first front view blue component H luminance coordinate, a first front view blue component H chromaticity coordinate, a second front view blue component H chromaticity coordinate, a first front view blue component L luminance coordinate, a first front view blue component L chromaticity coordinate, a second front view blue component L chromaticity coordinate, a first side view blue component H luminance coordinate, a first side view blue component H chromaticity coordinate, a second side view blue component H chromaticity coordinate, a first side view blue component L luminance coordinate, a first side view blue component L chromaticity coordinate, and a second side view blue component L chromaticity coordinate.
In this embodiment, the first front-view luminance coordinate is (the first front-view red component H luminance coordinate + the first side-view red component L luminance coordinate + the first front-view green component H luminance coordinate + the first front-view green component L luminance coordinate + the first front-view blue component H luminance coordinate + the first front-view blue component L luminance coordinate)/2.
In this embodiment, the first front view chromaticity coordinate is (the first front view red component H chromaticity coordinate + the first side view red component L chromaticity coordinate + the first front view green component H chromaticity coordinate + the first front view green component L chromaticity coordinate + the first front view blue component H chromaticity coordinate + the first front view blue component L chromaticity coordinate)/2.
In this embodiment, the second front-view chromaticity coordinate is (the second front-view red component H chromaticity coordinate + the second side-view red component L chromaticity coordinate + the second front-view green component H chromaticity coordinate + the second front-view green component L chromaticity coordinate + the second front-view blue component H chromaticity coordinate + the second front-view blue component L chromaticity coordinate)/2.
In this embodiment, the first side view luminance coordinate is (the first side view red component H luminance coordinate + the first side view red component L luminance coordinate + the first side view green component H luminance coordinate + the first side view green component L luminance coordinate + the first side view blue component H luminance coordinate + the first side view blue component L luminance coordinate)/2.
In this embodiment, the first side view chromaticity coordinate is (the first side view red component H chromaticity coordinate + the first side view red component L chromaticity coordinate + the first side view green component H chromaticity coordinate + the first side view green component L chromaticity coordinate + the first side view blue component H chromaticity coordinate + the first side view blue component L chromaticity coordinate)/2.
In this embodiment, the second sideview chromaticity coordinate is (the second sideview red component H chromaticity coordinate + the second sideview red component L chromaticity coordinate + the second sideview green component H chromaticity coordinate + the second sideview green component L chromaticity coordinate + the second sideview blue component H chromaticity coordinate + the second sideview blue component L chromaticity coordinate)/2.
In this embodiment, since the CESI chroma visual angle test frame needs L*u*v*Color space, so step S200 includes:
s201, obtaining, according to the side view luminance data, the side view color coordinate data, the front view luminance data and the front view color coordinate data, a high-low gray level value combination corresponding to an original gray level value, a first front view XYZ luminance coordinate corresponding to the original gray level value, a first front view XYZ chromaticity coordinate corresponding to the original gray level value, a first side view XYZ chromaticity coordinate corresponding to the original gray level value, a second front view XYZ luminance coordinate corresponding to the high-low gray level value combination, a second front view XYZ chromaticity coordinate corresponding to the high-low gray level value combination, and a second XYZ chromaticity coordinate corresponding to the high-low gray level value combination at least in a first screen of the display panel.
S202, converting the first front-view XYZ luminance coordinate into a first front-view L*u*v*Luminance coordinates as the first front-view luminance coordinates, and the first front-view XYZ chromaticity coordinates are converted into a first front-view L*u*v*The chromaticity coordinate is taken as the first front-view chromaticity coordinate, and the first side-view XYZ chromaticity coordinate is converted into a first side-view L*u*v*Chromaticity coordinates are taken as the first side-view chromaticity coordinates, and the second front-view XYZ luminance coordinates are converted into a second front-view L*u*v*The brightness coordinate is used as the second front-view brightness coordinate to display the second front-view brightness coordinateXYZ chromaticity coordinate conversion into the second front view L*u*v*Chromaticity coordinates as the second front-view chromaticity coordinates, and the second side-view XYZ chromaticity coordinates are converted into the second side-view L*u*v*And the chromaticity coordinate is taken as the second side-view chromaticity coordinate.
In this embodiment, the formula of the front-side view chromaticity deviation value is:
Figure BDA0002979613130000111
wherein Δ E represents the side view chromaticity deviation value, Δ u*Represents the first front view L*u*v*Chromaticity coordinates and the second front view L*u*v*Difference in chromaticity coordinates, Δ v*Represents the first side view L*u*v*Chromaticity coordinates and the second side view L*u*v*Difference in chromaticity coordinates.
In this embodiment, the color coordinate data includes XYZ color space (front view, side view), and L is required for CESI chromaticity visual angle test picture*u*v*Color space, therefore, it is necessary to convert XYZ color space to L*u*v*Color space, in XYZ color space, Y represents luminance coordinates and X, Z represents chromaticity coordinates. At L*u*v*In color space, L*Represents the luminance coordinate, u*、v*Representing the chromaticity coordinates.
S300, calculating a front-view brightness deviation value between the combination of the original gray level value and the high-low gray level value according to the first front-view brightness coordinate and the second front-view brightness coordinate;
s400, calculating a front-side view chromaticity deviation value between the original gray level value and the high-low gray level value according to the first front-view chromaticity coordinate, the first side-view chromaticity coordinate, the second front-view chromaticity coordinate and the second side-view chromaticity coordinate;
s500, when the front-view brightness deviation value is smaller than a first threshold value and the front-side view chromaticity deviation value is smaller than a second threshold value, combining the high and low gray scale values into qualified parameters; otherwise, adjusting the high-low gray level value combination to make the front-view brightness deviation value smaller than the first threshold value and the front-side view chroma deviation value smaller than the second threshold value.
In this embodiment, the general value of the first threshold is 0.4 nits. The general value of the second threshold is 0.2-0.25.
In this embodiment, the second threshold is 0.15 to 0.2, which can achieve a better color shift correction effect, in this embodiment, the second threshold is 0.04 to 0.15, which can achieve a better color shift correction effect.
In this embodiment, the objective measurement data of the blue picture and the red picture in the 9 pictures of seixi of the panel obtained by the experiment is poor, specifically referring to fig. 2, the data of other pictures is better, so that the luminance and chrominance parameter method can be debugged only for the R/G/B components of the two pictures of the blue picture and the red picture, i.e., the H/L values of the two specific pictures are refined by using the luminance and chrominance parameter method, and the chrominance visual angle can be remarkably improved.
In this embodiment, because there is an R/G/B component, for a first picture and a second picture, the front brightness deviation value includes a red component front brightness deviation value, a green component front brightness deviation value, and a blue component front brightness deviation value, the first threshold includes a first red component threshold, a first green component threshold, and a first blue component threshold, and the front brightness deviation value is smaller than the first threshold as required: the red component front view luminance deviation value is less than the first red component threshold value, the green component front view luminance deviation value is less than the first green component threshold value, and the blue component front view luminance deviation value is less than the first blue component threshold value. Since the human eye is sensitive to green and green is good for eye protection, the first red component threshold is 0.2nits, the first green component threshold is 0.4nits, and the first blue component threshold is 0.2 nits.
In this embodiment, the method for adjusting the display panel further includes:
s600, according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, a third high-low gray scale value combination corresponding to a third original gray scale value, a third front-view brightness coordinate corresponding to the third original gray scale value and a fourth front-view brightness coordinate corresponding to the third high-low gray scale value combination of the display panel under a third picture are obtained.
S700, calculating a third front-view brightness deviation value between the third original gray level value and the third high-low gray level value combination according to the third front-view brightness coordinate and the fourth front-view brightness coordinate.
S800, when the third front-view brightness deviation value is smaller than a third threshold value, combining the third high-low gray level values into qualified parameters; otherwise, adjusting the third high-low gray level value combination to enable the third front-view brightness deviation value to be smaller than a third threshold value.
In this embodiment, since there are original gray levels of the red frame and the blue frame, the original gray level of the third frame is named as a third original gray level.
In this embodiment, because there is an R/G/B component, for a third picture, that is, another color picture of a red picture and a blue picture, the front-view luminance deviation value includes a red component front-view luminance deviation value, a green component front-view luminance deviation value, and a blue component front-view luminance deviation value, the third threshold includes a third red component threshold, a third green component threshold, and a third blue component threshold, and the front-view luminance deviation value is smaller than the third threshold as required: the red component front view luminance deviation value is less than the third red component threshold value, the green component front view luminance deviation value is less than the third green component threshold value, and the blue component front view luminance deviation value is less than the third blue component threshold value.
In this embodiment, when an absolute value of a difference between the third original gray-scale value of the third picture and a red original gray-scale value of a red picture is smaller than a fourth threshold, or when an absolute value of a difference between the third original gray-scale value of the third picture and a blue original gray-scale value of a blue picture is smaller than a fifth threshold, the method for adjusting the display panel further includes:
s910, obtaining a first normalized luminance coordinate of a lower side view angle of the third picture according to the third high-low gray scale value combination.
S920, obtaining a plurality of first normalized luminance coordinates according to a third high-low gray scale value combination of the plurality of third pictures, taking the third original gray scale value corresponding to the third picture as an abscissa, and taking the first normalized luminance coordinates as an ordinate, to obtain a first curve, and when the smoothness of the first curve is smaller than a sixth threshold, obtaining a qualified parameter from the third high-low gray scale value combination; otherwise, adjusting the third high-low gray scale value combination so that the smoothness of the first curve is less than a sixth threshold value.
In this embodiment, the fourth threshold and the fifth threshold are used to limit the R/G/B adjacent gray scales near the red image and the blue image, and other adjacent gray scales except the red image and the blue image need to consider the principle that the front view brightness difference is small and the Gamma curve is smooth, so that the side view Gamma curve is basically smooth, the R/G/B brightness component proportion of the adjacent gray scale images is consistent, the problem of uneven large-view-angle gray scale transition and color cast is solved, and the chromaticity viewing angle is improved. The first normalized luminance coordinate is an ordinate of a Gamma curve, and the smoothness of the first curve can be obtained by integrating the curvature of the first curve on the first curve, and can be calculated by computer software, and the smoothness of the first curve is not expanded in detail.
According to the embodiment of the invention, the combination of the high gray level value and the low gray level value is adjusted through the judgment of the newly added chromatic value parameters, so that the front-side brightness deviation value is smaller than the first threshold value and the front-side chromaticity deviation value is smaller than the second threshold value, the color cast of a large visual angle is further reduced, and the display effect of the large visual angle is improved.
Referring to fig. 4, an embodiment of the present invention further discloses an adjusting apparatus 100 for a display panel, where the adjusting apparatus 100 includes a memory 200 and a controller 300, the memory 200 stores a plurality of instructions, and the controller 300 executes the plurality of instructions to perform steps of any of the adjusting methods for a display panel.
According to the embodiment of the invention, the combination of the high gray level value and the low gray level value is adjusted through the judgment of the newly added chromatic value parameters, so that the front-side brightness deviation value is smaller than the first threshold value and the front-side chromaticity deviation value is smaller than the second threshold value, the color cast of a large visual angle is further reduced, and the display effect of the large visual angle is improved.
The embodiment of the invention also discloses a display panel which is obtained by adjusting any one of the display panel adjusting methods.
In this embodiment, the display panel includes the substrate, is located the luminescence unit of substrate one side, is located keep away from on the substrate the array substrate of luminescence unit one side, be located liquid crystal layer on the array substrate, be located color film layer on the liquid crystal layer and be located the first polaroid and the second polaroid of liquid crystal layer both sides.
In the embodiment of the invention, the chroma value parameter is newly added, and the high-low gray level value combination is adjusted, so that the front-side brightness deviation value is smaller than the first threshold value and the front-side chroma deviation value is smaller than the second threshold value, the color cast of a large visual angle is further reduced, and the display effect of the large visual angle is improved.
The embodiment of the invention discloses a display panel adjusting method and device and a display panel. The adjusting method of the display panel comprises the following steps: acquiring brightness data and color coordinate data of a display panel; obtaining a high-low gray scale value combination corresponding to the original gray scale value of the display panel at least under the first picture; adjusting the high and low gray level value combination, and calculating a front-view brightness deviation value and a front-view and side-view chromaticity deviation value between the original gray level value and the high and low gray level value combination; when the front-view brightness deviation value is smaller than a first threshold value and the front-view and side-view chroma deviation value is smaller than a second threshold value, combining high and low gray level values into qualified parameters; otherwise, the high and low gray scale value combination is adjusted to meet the conditions. In the embodiment of the invention, the chroma value parameter is newly added, and the high-low gray level value combination is adjusted, so that the front-side brightness deviation value is smaller than the first threshold value and the front-side chroma deviation value is smaller than the second threshold value, the color cast of a large visual angle is further reduced, and the display effect of the large visual angle is improved.
The foregoing describes in detail a method and an apparatus for adjusting a display panel and a display panel provided in an embodiment of the present invention, and a specific example is applied in the present disclosure to explain the principle and the implementation of the present invention, and the description of the foregoing embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. An adjustment method for a display panel, comprising:
acquiring side-looking brightness data, side-looking color coordinate data, front-looking brightness data and front-looking color coordinate data of a first position of a display panel under each gray scale;
according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, obtaining a high-low gray-scale value combination corresponding to an original gray-scale value of the display panel at least under a first picture, a first front-view brightness coordinate corresponding to the original gray-scale value, a first front-view chromaticity coordinate corresponding to the original gray-scale value, a first side-view chromaticity coordinate corresponding to the original gray-scale value, a second front-view brightness coordinate corresponding to the high-low gray-scale value combination, a second front-view chromaticity coordinate corresponding to the high-low gray-scale value combination and a second side-view chromaticity coordinate corresponding to the high-low gray-scale value combination;
calculating a front-view brightness deviation value between the combination of the original gray level value and the high and low gray level values according to the first front-view brightness coordinate and the second front-view brightness coordinate;
calculating a front-side view chromaticity deviation value between the original gray level value and the high-low gray level value combination according to the first front-view chromaticity coordinate, the first side-view chromaticity coordinate, the second front-view chromaticity coordinate and the second side-view chromaticity coordinate;
when the front-view brightness deviation value is smaller than a first threshold value and the front-view and side-view chroma deviation value is smaller than a second threshold value, combining the high and low gray level values into qualified parameters; otherwise, adjusting the high-low gray level value combination to make the front-view brightness deviation value smaller than the first threshold value and the front-side view chroma deviation value smaller than the second threshold value.
2. The method for adjusting a display panel according to claim 1, wherein the step of obtaining, according to the side-view luminance data, the side-view color coordinate data, the front-view luminance data, and the front-view color coordinate data, a high-low gray-scale value combination corresponding to an original gray-scale value of the display panel at least on a first screen, a first front-view luminance coordinate corresponding to the original gray-scale value, a first front-view chromaticity coordinate corresponding to the original gray-scale value, a first side-view chromaticity coordinate corresponding to the high-low gray-scale value combination, a second front-view luminance coordinate corresponding to the high-low gray-scale value combination, a second front-view chromaticity coordinate corresponding to the high-low gray-scale value combination, and a second side-view chromaticity coordinate corresponding to the high-low gray-scale value combination includes:
the first picture is a red picture, and according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, a red high-low gray-scale value combination corresponding to a red original gray-scale value of the display panel under the red picture, a first red front-view brightness coordinate corresponding to the red original gray-scale value, a first red front-view chromaticity coordinate corresponding to the red original gray-scale value, a first red side-view chromaticity coordinate corresponding to the red original gray-scale value, a second red front-view brightness coordinate corresponding to the red high-low gray-scale value combination, a second red front-view chromaticity coordinate corresponding to the red high-low gray-scale value combination and a second red side-view chromaticity coordinate corresponding to the red high-low gray-scale value combination are obtained;
when a second picture is taken, the second picture is a blue picture, and according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, a blue high-low gray level value combination corresponding to a blue original gray level value, a first blue front-view brightness coordinate corresponding to the blue original gray level value, a first blue front-view chromaticity coordinate corresponding to the blue original gray level value, a first blue side-view chromaticity coordinate corresponding to the blue original gray level value, a second blue front-view brightness coordinate corresponding to the blue high-low gray level value combination, a second blue front-view chromaticity coordinate corresponding to the blue high-low gray level value combination and a second blue side-view chromaticity coordinate corresponding to the blue high-low gray level value combination of the display panel under the blue picture are obtained;
the front-view brightness deviation value comprises a red front-view brightness deviation value and a blue front-view brightness deviation value, the front-side view chromaticity deviation value comprises a red front-side view chromaticity deviation value and a blue front-side view chromaticity deviation value, and when the red front-view brightness deviation value is smaller than the first threshold value and the red front-side view chromaticity deviation value is smaller than the second threshold value, the red high-low gray level value combination is a qualified parameter; when the blue front-view brightness deviation value is smaller than the first threshold value and the blue front-side view chromaticity deviation value is smaller than the second threshold value, the blue high-low gray level value combination is a qualified parameter; otherwise, adjusting the corresponding high-low gray scale value combination.
3. The method for adjusting a display panel according to claim 1, wherein the step of obtaining, according to the side-view luminance data, the side-view color coordinate data, the front-view luminance data, and the front-view color coordinate data, a high-low gray-scale value combination corresponding to an original gray-scale value of the display panel at least on a first screen, a first front-view luminance coordinate corresponding to the original gray-scale value, a first front-view chromaticity coordinate corresponding to the original gray-scale value, a first side-view chromaticity coordinate corresponding to the high-low gray-scale value combination, a second front-view luminance coordinate corresponding to the high-low gray-scale value combination, a second front-view chromaticity coordinate corresponding to the high-low gray-scale value combination, and a second side-view chromaticity coordinate corresponding to the high-low gray-scale value combination includes:
obtaining a high-low gray level value combination corresponding to an original gray level value, a first front-view XYZ luminance coordinate corresponding to the original gray level value, a first front-view XYZ chromaticity coordinate corresponding to the original gray level value, a first side-view XYZ chromaticity coordinate corresponding to the original gray level value, a second front-view XYZ luminance coordinate corresponding to the high-low gray level value combination, a second front-view XYZ chromaticity coordinate corresponding to the high-low gray level value combination, and a second side-view XYZ chromaticity coordinate corresponding to the high-low gray level value combination of the display panel at least under a first picture according to the side-view luminance data, the side-view color coordinate data, the front-view luminance data, and the front-view color coordinate data;
converting the first front view XYZ luminance coordinates into a first front view L*u*v*Luminance coordinates as the first front-view luminance coordinates, and the first front-view XYZ chromaticity coordinates are converted into a first front-view L*u*v*The chromaticity coordinate is taken as the first front-view chromaticity coordinate, and the first side-view XYZ chromaticity coordinate is converted into a first side-view L*u*v*Chromaticity coordinates are taken as the first side-view chromaticity coordinates, and the second front-view XYZ luminance coordinates are converted into a second front-view L*u*v*Luminance coordinates as the second front-view luminance coordinates, and the second front-view XYZ chromaticity coordinates are converted into the second front-view L*u*v*Chromaticity coordinates as the second front-view chromaticity coordinates, and the second side-view XYZ chromaticity coordinates are converted into the second side-view L*u*v*And the chromaticity coordinate is taken as the second side-view chromaticity coordinate.
4. The adjusting method of claim 3, wherein the formula of the front-side view chromaticity bias value is as follows:
Figure FDA0002979613120000031
wherein Δ E represents the side view chromaticity deviation value, Δ u*Represents the first front view L*u*v*Chromaticity coordinates and the second front view L*u*v*Difference in chromaticity coordinates, Δ v*Represents the first side view L*u*v*Chromaticity coordinates and the second side view L*u*v*Difference in chromaticity coordinates.
5. The method for adjusting a display panel according to claim 1, further comprising:
according to the side-view brightness data, the side-view color coordinate data, the front-view brightness data and the front-view color coordinate data, obtaining a third high-low gray scale value combination corresponding to a third original gray scale value, a third front-view brightness coordinate corresponding to the third original gray scale value and a fourth front-view brightness coordinate corresponding to the third high-low gray scale value combination of the display panel under a third picture;
calculating a third front-view brightness deviation value between the third original gray level value and the third high-low gray level value combination according to the third front-view brightness coordinate and the fourth front-view brightness coordinate;
when the third front-view brightness deviation value is smaller than a third threshold value, the third high-low gray level value combination is a qualified parameter; otherwise, adjusting the third high-low gray level value combination to enable the third front-view brightness deviation value to be smaller than a third threshold value.
6. The method of claim 5, wherein when an absolute value of a difference between the third original gray scale value and a red original gray scale value of a red frame is smaller than a fourth threshold, or when an absolute value of a difference between the third original gray scale value and a blue original gray scale value of a blue frame is smaller than a fifth threshold, the method further comprises:
obtaining a first normalized luminance coordinate of a lower side view angle of the third picture according to the third high-low gray scale value combination;
obtaining a plurality of first normalized luminance coordinates according to a third high-low gray scale value combination of a plurality of third pictures, taking the third original gray scale value as an abscissa and the first normalized luminance coordinate as an ordinate to obtain a first curve, and when the smoothness of the first curve is smaller than a sixth threshold, taking the third high-low gray scale value combination as a qualified parameter; otherwise, adjusting the third high-low gray scale value combination so that the smoothness of the first curve is less than a sixth threshold value.
7. The adjusting method of the display panel according to claim 1, wherein the high-low gray level value combination comprises a red component high-low gray level value set, a green component high-low gray level value set, and a blue component high-low gray level value set;
and the red component high-low gray level value set, the green component high-low gray level value set and the blue component high-low gray level value set are respectively and independently adjusted.
8. The method according to claim 1, wherein the first measurement position of the front brightness data and the front color coordinate data is measured in a direction perpendicular to the display panel and passing through the first position, and the second measurement position of the side brightness data and the side color coordinate data is measured in a direction having an acute angle of 30 ° or more with respect to the display panel and passing through the first position.
9. An adjustment device of a display panel, characterized in that the adjustment device comprises a memory and a controller, the memory stores a plurality of instructions, the controller executes the plurality of instructions to execute the steps in the adjustment method of the display panel according to any one of claims 1 to 8.
10. A display panel adjusted by the adjusting method of any one of claims 1 to 8.
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