CN114112324B - Display screen brightness uniformity testing method and testing device - Google Patents
Display screen brightness uniformity testing method and testing device Download PDFInfo
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- CN114112324B CN114112324B CN202111319489.5A CN202111319489A CN114112324B CN 114112324 B CN114112324 B CN 114112324B CN 202111319489 A CN202111319489 A CN 202111319489A CN 114112324 B CN114112324 B CN 114112324B
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Abstract
The embodiment of the invention discloses a method and a device for testing brightness uniformity of a display screen, wherein the display screen comprises a display area, and the display area comprises a cambered edge; the testing method comprises the following steps: acquiring the radius of an arc edge, and determining an inward shrinking boundary point corresponding to the arc edge according to the radius of the arc edge; the inward shrinking boundary point is positioned in the display area; determining a display area to be detected of the display screen according to the inward shrinking boundary points of the arc edges; and acquiring the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the plurality of to-be-measured points. The technical scheme provided by the embodiment of the invention utilizes the curve edge radius to quantitatively determine the inward shrinkage boundary point of the brightness uniformity test, replaces the method for determining the inward shrinkage by personal test experience in the prior art, improves the problem of test errors caused by the judgment of a tester by personal experience, and further improves the accuracy of the brightness uniformity test result of the display screen.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a method and a device for testing brightness uniformity of a display screen.
Background
The brightness uniformity of the display screen reflects the display effect of the display screen, and when the brightness uniformity of the display screen with the arc edge is tested, the display area needs to be contracted inwards by a certain size to avoid the influence of the arc edge on the test.
At present, the shrinkage in the test screen is determined by personal test experience, and certain errors exist among different operators, so that the test result of the brightness uniformity of the display screen is inaccurate.
Disclosure of Invention
The embodiment of the invention provides a method and a device for testing the brightness uniformity of a display screen, which are used for improving the accuracy of a display screen brightness uniformity test result.
In a first aspect, an embodiment of the present invention provides a method for testing luminance uniformity of a display screen, where the display screen includes a display area, and the display area includes an arc edge; the test method comprises the following steps:
Acquiring an arc edge radius, and determining a shrinking boundary point corresponding to the arc edge according to the arc edge radius; the inward shrinking boundary point is positioned in the display area;
determining a display area to be detected of the display screen according to the inward shrinking boundary points of the arc edges;
And acquiring the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the plurality of to-be-measured points.
Optionally, the display area further includes a first straight line edge and a second straight line edge, the first straight line edge is connected with a first end of the arc edge, the second straight line edge is connected with a second end of the arc edge, and the first straight line edge is tangent to the arc edge at the first end of the arc edge; the second straight edge is tangent to the arcuate edge at a second end of the arcuate edge;
the obtaining the radius of the arc edge, and determining the shrinking boundary point of the arc edge according to the radius of the arc edge comprises the following steps:
Taking the first end of the arc edge as a foot, and taking a first vertical line of the first straight line edge, and taking the second end of the arc edge as a foot, and taking a second vertical line of the second straight line edge;
constructing a parallelogram by taking the intersection point of the first vertical line and the second vertical line as vertexes and taking the first vertical line and the second vertical line as adjacent sides;
determining an intersection point of two diagonal lines of the parallelogram;
And on a diagonal line pointing in an arc side direction from an intersection point of the first vertical line and the second vertical line, taking any point between the intersection point of the diagonal line and the arc side as the inward contraction boundary point.
Optionally, an intersection point of the two diagonal lines is taken as the retraction boundary point.
Optionally, the display area includes at least two arc edges, and two ends of each arc edge are respectively connected with a corresponding first straight line edge and a corresponding second straight line edge;
the determining the display area to be tested of the display screen according to the position of the inward shrinking boundary point of the arc edge comprises the following steps:
on the diagonal line of the intersection point pointing to the arc edge direction, determining the shrinkage boundary point with the largest distance from the corresponding arc edge in a plurality of shrinkage boundary points as a target shrinkage boundary point;
adjusting the inward shrinking boundary point of each arc edge according to the target inward shrinking boundary point;
and determining the display area to be measured according to the adjusted inward shrinking boundary points of each arc edge.
Optionally, the display area includes at least two arc edges, and two ends of each arc edge are respectively connected with a corresponding first straight line edge and a corresponding second straight line edge;
the determining the display area to be tested of the display screen according to the position of the inward shrinking boundary point of the arc edge comprises the following steps:
determining the maximum distance between the plurality of shrinking boundary points and the corresponding first straight line edge as a first target distance;
determining the maximum distance between the plurality of inward shrinking boundary points and the corresponding second straight line edge as a second target distance;
adjusting the distance between each inward shrinking boundary point and the corresponding first straight line edge and the distance between each inward shrinking boundary point and the corresponding second straight line edge according to the first target distance and the second target distance;
and determining the display area to be measured according to the adjusted inward shrinking boundary points of each arc edge.
Optionally, the display area includes a plurality of arc edges;
the determining the display area to be tested of the display screen according to the position of the inward shrinking boundary point of the arc edge comprises the following steps:
and determining the display area to be tested according to the connecting line of the inward shrinking boundary points corresponding to each arc edge.
Optionally, the display area includes a first arc edge, a second arc edge, a third arc edge, and a fourth arc edge, and includes a third straight line edge, a fourth straight line edge, a fifth straight line edge, and a sixth straight line edge; the third straight line edge is located between the first arc edge and the second arc edge, the fourth straight line edge is located between the second arc edge and the third arc edge, the fifth straight line edge is located between the third arc edge and the fourth arc edge, and the sixth straight line edge is located between the fourth arc edge and the first arc edge.
Optionally, the arc edge includes an arc edge or an elliptical arc edge.
Optionally, before obtaining the brightness of the plurality of to-be-measured points in the to-be-measured display area, the method includes:
controlling a plurality of to-be-tested points in the to-be-tested display area to display luminescence; the positions of the plurality of to-be-measured points are uniformly distributed in the to-be-measured display area.
In a second aspect, an embodiment of the present invention provides a device for testing luminance uniformity of a display screen, configured to execute the method for testing luminance uniformity of a display screen according to any of the first aspect; the test device comprises:
The inward shrinkage boundary point determining unit is used for obtaining the radius of the arc edge and determining the inward shrinkage boundary point of the arc edge according to the radius of the arc edge; the inward shrinking boundary point is positioned in the display area;
the display area to be measured determining unit is used for determining the display area to be measured of the display screen according to the position of the inward shrinking boundary point of the arc edge;
and the brightness uniformity testing unit is used for acquiring the brightness of a plurality of to-be-tested points in the to-be-tested display area so as to determine the uniformity of the brightness of the display screen according to the brightness of the to-be-tested points.
The embodiment of the invention provides a method and a device for testing brightness uniformity of a display screen, wherein the display screen comprises a display area, and the display area comprises a cambered edge; the test method comprises the following steps: acquiring the radius of an arc edge, and determining an inward shrinking boundary point corresponding to the arc edge according to the radius of the arc edge; the inward shrinking boundary point is positioned in the display area; determining a display area to be detected of the display screen according to the inward shrinking boundary points of the arc edges; and acquiring the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the plurality of to-be-measured points. According to the technical scheme provided by the embodiment of the invention, the arc edge radius of the arc edge is obtained, the inward shrinkage boundary point corresponding to the arc edge is determined according to the arc edge radius, and the display area to be tested of the display screen is determined according to the inward shrinkage boundary point of the arc edge, so that the influence of the arc edge on the brightness uniformity test is avoided, the method of determining the inward shrinkage by using personal test experience in the prior art is replaced, the inward shrinkage boundary point of the uniformity test is quantitatively determined by using the arc edge radius, the test error caused by personal experience judgment by a tester is avoided, and the accuracy of the brightness uniformity test result of the display screen is improved.
Drawings
FIG. 1 is a flowchart of a method for testing luminance uniformity of a display screen according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display area with a circular arc edge in a display screen according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display area with an elliptical arc edge in a display screen according to an embodiment of the present invention;
FIG. 4 is a flowchart of another method for testing luminance uniformity of a display screen according to an embodiment of the present invention;
Fig. 5 is a schematic diagram of a corresponding display screen structure in a process of determining a shrinking boundary point according to an embodiment of the present invention;
FIG. 6 is a flowchart of another method for testing luminance uniformity of a display screen according to an embodiment of the present invention;
Fig. 7 is a schematic structural diagram of a display screen corresponding to the process of adjusting an inward shrinking boundary point according to an embodiment of the present invention;
FIG. 8 is a flowchart of another method for testing luminance uniformity of a display screen according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a display screen corresponding to another process of adjusting a shrinking boundary point according to an embodiment of the present invention;
FIG. 10 is a schematic view of a display screen corresponding to another process of adjusting a shrinking boundary point according to an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of a display screen according to an embodiment of the present invention;
fig. 12 is a block diagram of a device for testing luminance uniformity of a display screen according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the background art, a display screen is often used as a display component of a display device such as a mobile phone or a computer, and a brightness uniformity index is an important parameter for representing the display uniformity of the display device, and the higher the brightness uniformity is, the better the brightness uniformity of each part of the display device is, so that better visual angle experience is brought to a user. The traditional measurement method is generally a 25-point or 135-point uniformity test method, specifically, brightness data of 25 positions or 135 positions of a display screen are tested by using a brightness meter, and then brightness uniformity indexes are obtained by a corresponding calculation method. With the great popularity of consumer electronic products, people are increasingly not only satisfied with the performance of the products, but also have higher requirements on the appearance. Not only is the display screen more and more approaching to "full screen", and the 90 right angle of display screen corner is changed into the arc limit, for example form of R angle, makes the display screen more mellow and more comfortable in use. When the brightness uniformity test is performed on the display screen with the arc edge, the display area needs to be contracted inwards by a certain size to avoid the influence of the arc edge on the brightness uniformity test. However, the in-screen shrinkage of the current test screen is basically determined by personal test experience or actual test, and certain errors exist in the in-screen shrinkage determined among different operators, so that the brightness uniformity test result of the display screen is inaccurate.
In view of this, the embodiment of the invention provides a method for testing luminance uniformity of a display screen, wherein the display screen comprises a display area, and the display area comprises a cambered edge; fig. 1 is a flowchart of a method for testing luminance uniformity of a display screen according to an embodiment of the present invention, and referring to fig. 1, the method includes:
S110, acquiring the radius of the arc edge, and determining an inward shrinking boundary point corresponding to the arc edge according to the radius of the arc edge; the shrink boundary point is located within the display area.
Specifically, the display area comprises an arc edge, and the arc edge can be arranged at the intersecting position of the straight line edges to replace a sharp angle formed by intersecting the two straight line edges, so that the display screen is more attractive and more comfortable to use. Fig. 2 is a schematic structural diagram of a display area with an arc edge in a display screen according to an embodiment of the present invention, referring to fig. 2, the arc edge may be an arc edge, and then the radius of the arc edge is a radius of a circle, the distance from the center of the circle to the first end of the arc edge in fig. 2 is r1, the distance from the center of the circle to the second end of the arc is r2, and r1=r2. Fig. 3 is a schematic structural diagram of a display area with an elliptical arc edge in a display screen according to an embodiment of the present invention, referring to fig. 3, the arc edge may also be an elliptical arc edge, the radius of the arc edge includes a major half axis and a minor half axis of an ellipse, in fig. 3, the distance from the center of the ellipse to the first end of the arc is r1, the distance from the center of the circle to the second end of the arc is r2, and r1 is smaller than r2. And determining the inward shrinkage boundary point corresponding to the arc edge according to the arc edge radius by acquiring the arc edge radius of the arc edge. And determining a shrinking boundary point of the uniformity test by utilizing the radius quantification of the arc edge, wherein the shrinking boundary point is positioned in the display area. The method for determining the shrinkage by the personal test experience in the prior art is replaced, and the problem of test errors caused by the judgment of the test personnel by the personal experience is solved.
S120, determining a display area to be detected of the display screen according to the inward shrinking boundary points of the arc edges.
Specifically, the inward shrinking boundary point is positioned in the display area, and the position of the inward shrinking boundary point is used as the boundary of the display area to be tested relative to the position of the arc edge as the boundary of the display area to be tested, so that the influence of the arc edge on the brightness uniformity test can be effectively avoided. The embodiment of the invention does not limit the shape of the display area and the number of the arc edges in the display screen. For example, referring to fig. 2-3, a common display screen includes a rectangular shape, and in order to improve the comfort of the display screen, an arc edge is disposed at a position where straight edges intersect, instead of a "sharp corner" formed by the intersection of two straight edges. The display area comprises 4 arc edges, each arc edge is correspondingly provided with an inward shrinking boundary point, at the moment, the display area to be tested of the display screen is determined according to the position of the inward shrinking boundary point of the arc edge, and the display area to be tested can be determined according to the connecting line of the inward shrinking boundary points corresponding to each arc edge. If only one vertex angle is replaced by an arc edge in the display area with the rectangular shape, determining the display area to be tested of the display screen according to the position of the inward-shrinking boundary point of the arc edge, wherein the inward-shrinking boundary point corresponding to the arc edge is used as a vertex, parallel lines of straight lines connected with two ends of the arc are respectively made through the vertex, the rectangle is reconstructed, and the reconstructed rectangle is the display area to be tested.
S130, obtaining the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the to-be-measured points.
Specifically, after the display area to be measured of the display screen is determined according to the inward shrinking boundary points of the arc edge, the brightness of a plurality of to-be-measured points in the display area to be measured is obtained, for example, brightness data of 25 positions or 135 positions of the display screen are tested through a brightness meter, the brightness of the plurality of to-be-measured points obtained through the brightness meter test is obtained, and then the brightness uniformity index can be determined through calculating the variance of the brightness of the plurality of to-be-measured points, so that the brightness uniformity of the display area to be measured is tested.
The embodiment of the invention provides a method for testing brightness uniformity of a display screen, wherein the display screen comprises a display area, and the display area comprises an arc edge; the test method comprises the following steps: acquiring the radius of an arc edge, and determining an inward shrinking boundary point corresponding to the arc edge according to the radius of the arc edge; the inward shrinking boundary point is positioned in the display area; determining a display area to be detected of the display screen according to the inward shrinking boundary points of the arc edges; and acquiring the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the plurality of to-be-measured points. According to the technical scheme provided by the embodiment of the invention, the arc edge radius of the arc edge is obtained, the inward shrinkage boundary point corresponding to the arc edge is determined according to the arc edge radius, and the display area to be tested of the display screen is determined according to the inward shrinkage boundary point of the arc edge, so that the influence of the arc edge on the brightness uniformity test is avoided, the method of determining the inward shrinkage by using personal test experience in the prior art is replaced, the inward shrinkage boundary point of the uniformity test is quantitatively determined by using the arc edge radius, the condition that test errors are caused by personal experience judgment by a tester is avoided, and the accuracy of the brightness uniformity test result of the display screen is improved.
Optionally, the display area further includes a first straight line edge and a second straight line edge, the first straight line edge is connected with the first end of the arc edge, the second straight line edge is connected with the second end of the arc edge, and the first straight line edge is tangent to the arc edge at the first end of the arc edge; the second straight edge is tangent to the arcuate edge at a second end of the arcuate edge. The radius of the arc edge is obtained, and the inward shrinkage boundary point of the arc edge is determined according to the radius of the arc edge, and can be determined by combining the first straight line edge and the second straight line edge.
Fig. 4 is a flowchart of another method for testing luminance uniformity of a display screen according to an embodiment of the present invention, and referring to fig. 4, the method includes:
s210, taking the first end of the arc edge as a foot, taking a first vertical line of the first straight line edge, and taking the second end of the arc edge as a foot, taking a second vertical line of the second straight line edge.
Specifically, fig. 5 is a schematic diagram of a display screen structure corresponding to the process of determining the retraction boundary point D according to the embodiment of the present invention, referring to fig. 5, the arc edge 3 includes a first end and a second end, the first straight line edge 1 is connected with the first end of the arc edge 3, the first end of the arc edge 3 is taken as a foot, a first vertical line r1 of the first straight line edge 1 is made, and the first vertical line r1 is located in a display area of the display screen. The second straight line edge 2 is connected with the second end of the arc edge 3, the second end of the arc edge 3 is taken as a foot, a second vertical line r2 of the second straight line edge 2 is made, and the second vertical line r2 is located in a display area of the display screen. Since the first straight line side 1 is connected to the first end of the arc side 3, the second straight line side 2 is connected to the second end of the arc side 3, and the arc side 3 has a certain degree of curvature, the extension line of the first straight line side 1 intersects with the extension line of the second straight line side 2, and the first vertical line r1 intersects with the second vertical line r2 at a point in the display area.
S220, constructing a parallelogram by taking the intersection point of the first vertical line and the second vertical line as vertexes and taking the first vertical line and the second vertical line as adjacent sides.
Specifically, with continued reference to fig. 5, the first vertical line r1 and the second vertical line r2 may be translated in a translation manner, so that the first vertical line r1, the second vertical line r2, the translated first vertical line r11 and the translated second vertical line r21 are sequentially connected end to construct a parallelogram. That is, the formed quadrangle conforms to a parallelogram with the intersection point of the first vertical line r1 and the second vertical line r2 as the vertex a and the first vertical line r1 and the second vertical line r2 as adjacent sides.
If the arc edge 3 is an arc edge, the radius of the arc edge 3 is a circular radius, and the length corresponding to a first vertical line r1 of a first straight line edge 1 which is formed by taking the first end of the arc edge 3 as a drop foot is equal to the length corresponding to a second vertical line r2 of a second straight line edge 2 which is formed by taking the second end of the arc edge 3 as a drop foot, and at the moment, the built parallelogram is a rhombus with four equal sides. If the arc edge 3 is an elliptical arc edge, the radius of the arc edge 3 comprises a long half axis and a short half axis of an ellipse, the length corresponding to a first vertical line r1 of a first straight line edge 1 which is formed by taking the first end of the arc edge 3 as a drop foot is not equal to the length corresponding to a second vertical line r2 of a second straight line edge 2 which is formed by taking the second end of the arc edge 3 as a drop foot, and the parallelogram constructed at the moment is a parallelogram with unequal adjacent sides.
When the angle obtained by intersecting the extension line of the first straight line side 1 and the extension line of the second straight line side 2 is a right angle, the constructed parallelogram is rectangular. If the arc edge 3 is an arc edge, the length corresponding to the first vertical line r1 of the first straight line edge 1 with the first end of the arc edge 3 as the foot drop is equal to the length corresponding to the second vertical line r2 of the second straight line edge 2 with the second end of the arc edge 3 as the foot drop, and the rectangle constructed at this time is a special rectangle with equal length and width, namely a square (the quadrangle constructed by drawing in fig. 5 is a square). If the arc edge 3 is an elliptical arc edge, the radius of the arc edge 3 comprises the length of a long half shaft and the length of a short half shaft of an ellipse, the length corresponding to a first vertical line r1 of a first straight line edge 1 which is formed by taking the first end of the arc edge 3 as a drop foot is not equal to the length corresponding to a second vertical line r2 of a second straight line edge 2 which is formed by taking the second end of the arc edge 3 as a drop foot, and the rectangle constructed at the moment is a rectangle with unequal length and width.
S230, determining the intersection point of two diagonals of the parallelogram; on a diagonal line directed in the arc side direction from the intersection point of the first vertical line and the second vertical line, any point between the intersection point of the diagonal line and the arc side is taken as an inward contraction boundary point.
Specifically, please continue to refer to fig. 5, two diagonal lines of the parallelogram are equally divided and equal, and the intersection point C of the two diagonal lines is the center point of the parallelogram. In the embodiment of the present invention, with respect to determining the retraction boundary point D between the intersection point (vertex a) of the first vertical line r1 and the second vertical line r2 and the diagonal line intersection point C, on the diagonal line in the direction from the intersection point of the first vertical line r1 and the second vertical line r2 to the arc edge 3, any point between the diagonal line intersection point C and the arc edge 3 is taken as the retraction boundary point D corresponding to the arc edge 3, that is, the retraction boundary point D is taken between the diagonal line intersection point C and the intersection point B of the diagonal line and the arc edge 3. The method can effectively avoid the influence of the arc edge 3 on the test result, reduce the reduction of the area of the display area to be tested and ensure the area of the display area to be tested. The area of the display area to be measured, which is obtained by taking a point between the diagonal intersection C and the arc edge 3 as the inward-shrinking boundary point D, is larger than the area of the display area to be measured, which is obtained by taking a point between the intersection of the first vertical line r1 and the second vertical line r2 and the diagonal intersection C as the inward-shrinking boundary point D. Thereby enabling a maximized testing of the display area of the display screen. It should be noted that, the distance between the determined retracted boundary point D and the arc edge 3 is greater than zero, that is, the retracted boundary point D cannot take the position of the intersection point B.
S240, determining a display area to be detected of the display screen according to the inward shrinking boundary points of the arc edges.
S250, controlling a plurality of to-be-tested points in the to-be-tested display area to display luminescence; the positions of the plurality of to-be-measured points are uniformly distributed in the to-be-measured display area.
Specifically, the positions of the plurality of to-be-tested points are uniformly distributed in the to-be-tested display area, and the pixel units at the corresponding positions in the to-be-tested display area are controlled to emit light. The positions of the plurality of to-be-measured points are uniformly distributed in the to-be-measured display area, for example, the determined to-be-measured display area is rectangular, the positions of the to-be-measured points comprise 25 to-be-measured points, and the 25 to-be-measured points are uniformly distributed in the to-be-measured display area in an array mode of 5 rows by 5 columns. The positions of the plurality of to-be-measured points are uniformly distributed in the to-be-measured display area, so that the acquired brightness data can uniformly cover the whole to-be-measured display area, and the brightness uniformity of the display screen can be further tested.
S260, obtaining the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the to-be-measured points.
The embodiment of the invention provides a method for testing brightness uniformity of a display screen, wherein the display screen comprises a display area, and the display area comprises an arc edge; the display area further comprises a first linear edge and a second linear edge, the first linear edge is connected with the first end of the arc edge, the second linear edge is connected with the second end of the arc edge, and the first linear edge is tangent to the arc edge at the first end of the arc edge; the second straight line edge is tangent to the arc edge at the second end of the arc edge; acquiring the radius of the arc edge, and determining the inward shrinkage boundary point of the arc edge according to the radius of the arc edge comprises: taking the first end of the arc edge as a foot, making a first vertical line of the first straight line edge, and taking the second end of the arc edge as a foot, making a second vertical line of the second straight line edge; constructing a parallelogram by taking the intersection point of the first vertical line and the second vertical line as vertexes and taking the first vertical line and the second vertical line as adjacent sides; determining the intersection point of two diagonal lines of the parallelogram; on a diagonal line directed in the arc side direction from the intersection point of the first vertical line and the second vertical line, any point between the intersection point of the diagonal line and the arc side is taken as an inward contraction boundary point. And determining a display area to be detected of the display screen according to the inward shrinking boundary points of the arc edges. Utilizing parallelogram-related properties: the diagonal lines are equally divided and equal, the intersection point of the two diagonal lines is taken as a central point, the method for determining the inward shrinkage boundary point is simplified, and the intersection point of the two diagonal lines and the intersection point of one diagonal line and the arc edge are found.
Alternatively, the intersection of two diagonals is taken as the retraction boundary point.
Specifically, with respect to the fact that any point between the intersection point of the diagonal lines and the arc edge is taken as the retraction boundary point on the diagonal line pointing from the intersection point of the first vertical line and the second vertical line in the arc edge direction, the embodiment of the invention directly takes the intersection point of the two diagonal lines as the retraction boundary point, and the determination process of the retraction boundary point can be further simplified. In addition, the intersection point of two diagonal lines is one or only one, and the intersection point of the two diagonal lines is directly used as an inward shrinkage boundary point, so that the problem that the error of test data results is large due to the fact that different testers determine the inward shrinkage boundary points is inconsistent can be further solved, and the accuracy of the display screen brightness uniformity test results is improved.
Optionally, the display area includes at least two arc edges, and two ends of each arc edge are respectively connected with a corresponding first straight line edge and a corresponding second straight line edge; fig. 6 is a flowchart of another method for testing luminance uniformity of a display screen according to an embodiment of the present invention, and referring to fig. 6, the method includes:
S310, acquiring the radius of each arc edge, and determining a shrinking boundary point corresponding to each arc edge according to the radius of each arc edge; the shrink boundary point is located within the display area.
S320, determining the shrinking boundary point with the largest distance from the corresponding arc edge in the shrinking boundary points as the target shrinking boundary point on the diagonal line in the direction that the intersection points point to the arc edge.
Specifically, the shrink boundary point having the largest distance from the corresponding arc edge among the plurality of shrink boundary points is taken as the target shrink boundary point. It should be noted that the determination standard of each retraction boundary point is the same. Illustratively, intersection points of diagonal lines of the parallelograms respectively constructed correspondingly are taken as inward shrinking boundary points; or the trisection points between the intersection points of the diagonals and the arc edges are used as the inward contraction boundary points.
S330, adjusting the inward shrinking boundary point of each arc edge according to the target inward shrinking boundary point.
Specifically, fig. 7 is a schematic diagram of a display screen corresponding to a process of adjusting a shrinking boundary point in the present embodiment, and referring to fig. 7, adjusting the shrinking boundary point of each arc edge according to a target shrinking boundary point may be understood as adjusting the shrinking boundary point of each arc edge on a diagonal line in a direction that an intersection point points to the arc edge, where a distance from the arc edge is equal to a distance from the target shrinking boundary point to the corresponding arc edge (in the figure, a point D represents the shrinking boundary point after adjustment, and a point D1 represents the shrinking boundary point before adjustment). After the shrinking boundary points of each arc edge are adjusted according to the target shrinking boundary points, the shrinking boundary points of each arc edge are on the diagonal line in the direction that the intersection points point to the arc edge, the distances from the arc edge are equal, and the distances from the arc edge are equal to the maximum distances between the shrinking boundary points and the corresponding arc edge, wherein the maximum distances are p. The influence of each arc edge on the brightness uniformity test can be avoided, the inward shrinkage of each arc edge (the length between the arc edge and the inward shrinkage boundary point on the diagonal line in the direction of the intersection point to the arc edge) is equal, so that the influence of each arc edge on the brightness uniformity is reduced by the same influence amount, and the accuracy of the display screen brightness uniformity test result is further improved.
S340, determining a display area to be measured according to the adjusted inward shrinking boundary points of each arc edge.
S350, acquiring the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the to-be-measured points.
The display screen comprises a display area, wherein the display area comprises at least two arc edges, and two ends of each arc edge are respectively connected with a first straight line edge and a second straight line edge which are corresponding to each other. Acquiring the radius of each arc edge, determining a corresponding inward shrinking boundary point of each arc edge according to the radius of each arc edge, and determining the inward shrinking boundary point with the largest distance from the corresponding arc edge in a plurality of inward shrinking boundary points as a target inward shrinking boundary point on a diagonal line in the direction of the intersection point to the arc edge; and adjusting the inward shrinking boundary point of each arc edge according to the target inward shrinking boundary point. So that the inward shrinking boundary points of each arc edge are equal in distance from the arc edge on the diagonal line in the direction that the intersection points point to the arc edge, and the distance from the arc edge is equal to the maximum distance from the corresponding arc edge in the inward shrinking boundary points. The influence of each arc edge on the brightness uniformity test can be avoided, and meanwhile, the inward shrinkage of each arc edge is equal, so that the influence of each arc edge on the brightness uniformity is reduced by the same influence, and the accuracy of the display screen brightness uniformity test result is further improved.
Fig. 8 is a flowchart of another method for testing luminance uniformity of a display screen according to an embodiment of the present invention, and referring to fig. 8, the method includes:
S410, acquiring the radius of each arc edge, and determining the inward shrinking boundary point corresponding to each arc edge according to the radius of each arc edge; the shrink boundary point is located within the display area.
S420, determining the maximum distance between the plurality of shrinking boundary points and the corresponding first straight line edge as a first target distance.
S430, determining the maximum distance between the plurality of shrinking boundary points and the corresponding second straight line edge as a second target distance.
S440, adjusting the distance between each inward shrinking boundary point and the corresponding first straight line edge and the distance between each inward shrinking boundary point and the corresponding second straight line edge according to the first target distance and the second target distance.
Specifically, the display area to be detected of the display screen can be determined according to the positions of the inward shrinking boundary points of the arc edges, and the maximum distance between the inward shrinking boundary points and the corresponding first straight line edges can be determined to be the first target distance, and the maximum distance between the inward shrinking boundary points and the corresponding second straight line edges can be determined to be the second target distance; and adjusting the distance between each inward shrinking boundary point and the corresponding first straight line edge and the distance between each inward shrinking boundary point and the corresponding second straight line edge according to the first target distance and the second target distance, so that the distances between the adjusted inward shrinking boundary point and the corresponding first straight line edge are equal to the first target distance and the distances between the adjusted inward shrinking boundary point and the corresponding second straight line edge are equal to the second target distance.
Fig. 9 is a schematic diagram of a display screen corresponding to another process of adjusting a shrinking boundary point according to an embodiment of the present invention, and refer to fig. 9, in which a display area is polygonal, and the number of straight sides of the polygon is even (fig. 9 illustrates a hexagon, and points D are all adjusted shrinking boundary points). The intersection position of two adjacent straight line edges is an arc edge, namely, two ends of each arc edge are respectively connected with a corresponding first straight line edge 1 and a corresponding second straight line edge 2. Two adjacent arc edges can share the first straight line edge 1 or the second straight line edge 2. The maximum distance between each shrinking boundary point and the corresponding first straight line edge 1 in the plurality of shrinking boundary points is determined to be a first target distance d1, and the distance between each shrinking boundary point and the corresponding first straight line edge 1 is adjusted according to the first target distance d 1; so that the distance between the adjusted inward shrinking boundary point D and the corresponding first straight line edge 1 is equal to the first target distance D1. And determining the maximum distance between each of the plurality of shrinking boundary points and the corresponding second straight line edge 2 as a second target distance D2, and adjusting the distance between each shrinking boundary point and the corresponding second straight line edge 2 according to the second target distance D2 so that the adjusted shrinking boundary point D and the corresponding second straight line edge 2 are equal to the second target distance D2.
Fig. 10 is a schematic diagram of a display screen corresponding to another process of adjusting a shrinking boundary point according to an embodiment of the present invention, and referring to fig. 10, a display area is polygonal, and the number of straight sides of the polygon is odd (fig. 10 illustrates pentagons, and points D are all adjusted shrinking boundary points). The intersection position of two adjacent straight line edges is an arc edge, namely, two ends of each arc edge are respectively connected with a corresponding first straight line edge 1 and a corresponding second straight line edge 2. Since for the odd-side polygons, at least one straight line side cannot be simultaneously the first straight line side 1 of the arc sides at both ends of the straight line or the second straight line side 2 of the arc sides at both ends of the straight line. Therefore, when the distance between each retracted boundary point and the corresponding first straight line edge 1 and the distance between each retracted boundary point and the corresponding second straight line edge 2 are adjusted according to the first target distance and the second target distance, the first straight line edge 1 and the second straight line edge 2 corresponding to the adjusted retracted boundary point distances are required to be equal, so that the condition that the display area to be measured is determined to be a regular graph according to the retracted boundary point of each adjusted arc edge can be met. According to the first target distance and the second target distance, the distance between each retracted boundary point and the corresponding first straight line edge 1 and the distance between each retracted boundary point and the corresponding second straight line edge 2 are adjusted, the larger value of the first target distance and the second target distance can be determined first, the larger value of the first target distance and the second target distance is taken as the third target distance D3, and the adjusted retracted boundary point D is the third target distance D3 from the corresponding first straight line edge 1 and second straight line edge 2.
S450, determining a display area to be measured according to the adjusted inward shrinking boundary points of each arc edge.
S460, obtaining the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the to-be-measured points.
The display screen comprises a display area, wherein the display area comprises at least two arc edges, and two ends of each arc edge are respectively connected with a first straight line edge and a second straight line edge which are corresponding to each other. Acquiring the radius of each arc edge, determining the inward shrinking boundary point corresponding to each arc edge according to the radius of each arc edge, determining the maximum distance between the first linear edge corresponding to the inward shrinking boundary point as a first target distance, and determining the maximum distance between the second linear edge corresponding to the inward shrinking boundary point as a second target distance; and adjusting the distance between each inward shrinking boundary point and the corresponding first straight line edge and the distance between each inward shrinking boundary point and the corresponding second straight line edge according to the first target distance and the second target distance, so that the graph of the display area to be detected is determined to be similar to the original graph (polygon without the arc edge) of the display area according to the adjusted inward shrinking boundary points of each arc edge. If the original graph of the display area is a regular polygon, the display area to be measured can be determined to be a regular polygon according to the adjusted inward shrinking boundary points of each arc edge, so that a plurality of measuring points can be uniformly distributed in the display area to be measured, and the accuracy of the brightness uniformity test result of the display screen is further improved.
Fig. 11 is a schematic structural view of a display screen according to an embodiment of the present invention, and referring to fig. 11, a display area includes a first arc edge a, a second arc edge b, a third arc edge c, and a fourth arc edge d, and includes a third straight line edge 11, a fourth straight line edge 12, a fifth straight line edge 13, and a sixth straight line edge 14; the third straight line edge 11 is located between the first arc edge a and the second arc edge b, the fourth straight line edge 12 is located between the second arc edge b and the third arc edge c, the fifth straight line edge 13 is located between the third arc edge c and the fourth arc edge d, and the sixth straight line edge 14 is located between the fourth arc edge d and the first arc edge a. The display area is in a common shape, and the display area to be tested can be determined by the method for testing the brightness uniformity of the display screen, which is described in any embodiment, and the brightness uniformity is tested.
Illustratively, if the third straight line side 11 is the first straight line side of the first arc side a, the sixth straight line side 14 is the second straight line side of the first arc side a; the third straight line edge 11 also serves as a first straight line edge of the second arc edge b, and the fourth straight line edge 12 serves as a second straight line edge of the second arc edge b; the fourth straight line side 12 is taken as a second straight line side of the third arc side c, and the fifth straight line side 13 is taken as a first straight line side of the third arc side c; the fifth straight line side 13 serves as a first straight line side of the fourth arc side d, and the sixth straight line side 14 serves as a second straight line side of the fourth arc side d. And acquiring the radius of each arc edge, and determining the inward shrinking boundary point corresponding to each arc edge according to the radius of each arc edge. In the process of determining the inward contraction boundary points, taking the first end of each arc edge as a foot, making a first vertical line of a corresponding first straight line edge, and taking the second end of each arc edge as a foot, making a second vertical line of a corresponding second straight line edge; the intersection point of the first vertical line and the second vertical line is a vertex, and the first vertical line and the second vertical line are adjacent sides to form a parallelogram, namely, each arc side is provided with a parallelogram. And determining intersection points of two diagonals of the parallelogram, and taking the intersection points of the two diagonals as the inward-shrinking boundary points of the respective arc edges. After determining the inward shrinking boundary points of each arc edge, determining the maximum distance between the 4 inward shrinking boundary points and the corresponding first straight line edge as a first target distance d1; determining the maximum distance between the 4 inward shrinking boundary points and the corresponding second straight line edge as a second target distance d2; and adjusting the distance between each inward shrinking boundary point and the corresponding first straight line side according to the first target distance d1, and adjusting the distance between each inward shrinking boundary point and the corresponding second straight line side according to the second target distance d 2. Determining a display area to be measured according to the adjusted inward shrinking boundary points of each arc edge; and finally, acquiring the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the to-be-measured points. Referring to fig. 11, when the display area of the display screen is rectangular, the shape of the display area to be measured determined according to the scheme of the embodiment is rectangular, so that a plurality of points to be measured of the display area to be measured can be uniformly distributed, and accuracy of the brightness uniformity test result of the display screen is improved.
The embodiment of the invention also provides a device for testing the brightness uniformity of the display screen, which is used for executing the method for testing the brightness uniformity of the display screen, which is described in any embodiment; fig. 12 is a block diagram of a device for testing luminance uniformity of a display screen according to an embodiment of the present invention, and referring to fig. 12, the device includes:
A retracted boundary point determining unit 10, configured to obtain a radius of a curved edge, and determine a retracted boundary point of the curved edge according to the radius of the curved edge; the inward shrinking boundary point is positioned in the display area;
the display area to be measured determining unit 20 determines a display area to be measured of the display screen according to the position of the inward shrinking boundary point of the arc edge;
and the brightness uniformity testing unit 30 is configured to obtain brightness of a plurality of to-be-tested points in the to-be-tested display area, so as to determine uniformity of brightness of the display screen according to the brightness of the plurality of to-be-tested points.
Optionally, the display area further includes a first straight line edge and a second straight line edge, the first straight line edge is connected with a first end of the arc edge, the second straight line edge is connected with a second end of the arc edge, and the first straight line edge is tangent to the arc edge at the first end of the arc edge; the second straight edge is tangent to the arcuate edge at a second end of the arcuate edge;
a shrink boundary point determination unit comprising:
The parallelogram construction subunit is used for taking the first end of the arc edge as a foot, making a first vertical line of the first straight line edge, and taking the second end of the arc edge as a foot, making a second vertical line of the second straight line edge; constructing a parallelogram by taking the intersection point of the first vertical line and the second vertical line as the vertex and taking the first vertical line and the second vertical line as adjacent sides;
A shrink boundary point determination subunit, configured to determine an intersection point of two diagonal lines of the parallelogram; on a diagonal line directed in the arc side direction from the intersection point of the first perpendicular line and the second perpendicular line, a shrink boundary point is determined between the intersection point of the diagonal line and the arc side. Alternatively, the intersection of two diagonals is taken as the retraction boundary point.
Optionally, the display area includes at least two arc edges, and two ends of each arc edge are respectively connected with a corresponding first straight line edge and a corresponding second straight line edge;
the display area to be measured determining unit includes:
A target retraction boundary point determining subunit, configured to determine, on a diagonal line in a direction in which the intersection points point to the arc edge, a retraction boundary point with the largest distance from the corresponding arc edge among the plurality of retraction boundary points as a target retraction boundary point;
the first inward shrinking boundary point adjusting subunit is used for adjusting the inward shrinking boundary point of each arc edge according to the target inward shrinking boundary point;
and the first to-be-detected display area determining subunit is used for determining the to-be-detected display area according to the adjusted inward shrinking boundary point of each arc edge.
Optionally, the display area includes at least two arc edges, and two ends of each arc edge are respectively connected with a corresponding first straight line edge and a corresponding second straight line edge;
The display area to be measured determining unit further includes:
a first target distance determining subunit, configured to determine a maximum distance between the plurality of retracted boundary points and the corresponding first straight line edge as a first target distance;
A second target distance determining subunit, configured to determine a maximum distance between the plurality of retracted boundary points and the corresponding second straight line edge as a second target distance;
The second inward shrinking boundary point adjusting subunit is used for adjusting the distance between each inward shrinking boundary point and the corresponding first straight line edge and the distance between each inward shrinking boundary point and the corresponding second straight line edge according to the first target distance and the second target distance;
and the second display area to be measured determining subunit is used for determining the display area to be measured according to the adjusted inward shrinking boundary point of each arc edge.
Optionally, the display area includes a plurality of arcuate edges; the first to-be-detected display area determining subunit and the second to-be-detected display area determining subunit are both used for determining the to-be-detected display area according to the connecting line of the inward shrinking boundary points corresponding to each arc edge.
Optionally, the device for testing the brightness uniformity of the display screen further comprises a control unit, configured to control the display luminescence of the plurality of to-be-tested points in the to-be-tested display area before the brightness of the plurality of to-be-tested points in the to-be-tested display area is obtained; the positions of the plurality of to-be-measured points are uniformly distributed in the to-be-measured display area.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. The method for testing the brightness uniformity of the display screen is characterized in that the display screen comprises a display area, and the display area comprises an arc edge; the test method comprises the following steps:
Acquiring an arc edge radius, and determining a shrinking boundary point corresponding to the arc edge according to the arc edge radius; the inward shrinking boundary point is positioned in the display area;
determining a display area to be detected of the display screen according to the position of the inward shrinking boundary point of the arc edge;
acquiring the brightness of a plurality of to-be-measured points in the to-be-measured display area, and determining the uniformity of the brightness of the display screen according to the brightness of the plurality of to-be-measured points;
The display area further comprises a first straight line edge and a second straight line edge, wherein the first straight line edge is connected with the first end of the arc edge, the second straight line edge is connected with the second end of the arc edge, and the first straight line edge is tangent to the arc edge at the first end of the arc edge; the second straight edge is tangent to the arcuate edge at a second end of the arcuate edge; the obtaining the radius of the arc edge, and determining the shrinking boundary point of the arc edge according to the radius of the arc edge comprises the following steps:
Taking the first end of the arc edge as a foot, and taking a first vertical line of the first straight line edge, and taking the second end of the arc edge as a foot, and taking a second vertical line of the second straight line edge;
constructing a parallelogram by taking the intersection point of the first vertical line and the second vertical line as vertexes and taking the first vertical line and the second vertical line as adjacent sides;
determining an intersection point of two diagonal lines of the parallelogram;
And on a diagonal line pointing in an arc side direction from an intersection point of the first vertical line and the second vertical line, taking any point between the intersection point of the diagonal line and the arc side as the inward contraction boundary point.
2. The method according to claim 1, wherein an intersection point of the two diagonal lines is used as the retracted boundary point.
3. The method for testing luminance uniformity of a display screen according to claim 1, wherein said display area comprises at least two arc sides, and each arc side has two ends respectively connected to a corresponding first straight side and a corresponding second straight side;
the determining the display area to be tested of the display screen according to the position of the inward shrinking boundary point of the arc edge comprises the following steps:
on the diagonal line of the intersection point pointing to the arc edge direction, determining the shrinkage boundary point with the largest distance from the corresponding arc edge in a plurality of shrinkage boundary points as a target shrinkage boundary point;
adjusting the inward shrinking boundary point of each arc edge according to the target inward shrinking boundary point;
and determining the display area to be measured according to the adjusted inward shrinking boundary points of each arc edge.
4. The method for testing luminance uniformity of a display screen according to claim 1, wherein said display area comprises at least two arc sides, and each arc side has two ends respectively connected to a corresponding first straight side and a corresponding second straight side;
the determining the display area to be tested of the display screen according to the position of the inward shrinking boundary point of the arc edge comprises the following steps:
determining the maximum distance between the plurality of shrinking boundary points and the corresponding first straight line edge as a first target distance;
determining the maximum distance between the plurality of inward shrinking boundary points and the corresponding second straight line edge as a second target distance;
adjusting the distance between each inward shrinking boundary point and the corresponding first straight line edge and the distance between each inward shrinking boundary point and the corresponding second straight line edge according to the first target distance and the second target distance;
and determining the display area to be measured according to the adjusted inward shrinking boundary points of each arc edge.
5. The method for testing luminance uniformity of a display screen according to claim 1, wherein said display area comprises a plurality of arcuate edges;
the determining the display area to be tested of the display screen according to the position of the inward shrinking boundary point of the arc edge comprises the following steps:
and determining the display area to be tested according to the connecting line of the inward shrinking boundary points corresponding to each arc edge.
6. The method of claim 1, wherein the arcuate edge comprises a circular arc edge or an elliptical arc edge.
7. The method for testing luminance uniformity of a display screen according to claim 1, wherein before obtaining luminance of a plurality of points to be tested in the display area to be tested, comprising:
controlling a plurality of to-be-tested points in the to-be-tested display area to display luminescence; the positions of the plurality of to-be-measured points are uniformly distributed in the to-be-measured display area.
8. A device for testing luminance uniformity of a display screen, which is characterized by being used for executing the method for testing luminance uniformity of a display screen according to any one of claims 1 to 7, and comprising:
The inward shrinkage boundary point determining unit is used for obtaining the radius of the arc edge and determining the inward shrinkage boundary point of the arc edge according to the radius of the arc edge; the inward shrinking boundary point is positioned in the display area;
the display area to be measured determining unit is used for determining the display area to be measured of the display screen according to the position of the inward shrinking boundary point of the arc edge;
and the brightness uniformity testing unit is used for acquiring the brightness of a plurality of to-be-tested points in the to-be-tested display area so as to determine the uniformity of the brightness of the display screen according to the brightness of the to-be-tested points.
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