CN112903253B - Testing jig and testing method for flexible display panel - Google Patents
Testing jig and testing method for flexible display panel Download PDFInfo
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- CN112903253B CN112903253B CN202110084191.4A CN202110084191A CN112903253B CN 112903253 B CN112903253 B CN 112903253B CN 202110084191 A CN202110084191 A CN 202110084191A CN 112903253 B CN112903253 B CN 112903253B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
Abstract
The embodiment of the invention discloses a testing jig and a testing method for a flexible display panel. Wherein, flexible display panel's test fixture includes: the light collecting device comprises a bearing module and a light collecting module, wherein the bearing module is provided with a first surface which is used for being attached to the flexible display panel, the first surface comprises a first cylindrical surface, and the slope of a tangent line of the first cylindrical surface at each position along the extending direction of the tangent line is gradually increased or gradually decreased; the light collection module is used for collecting light emitted by the flexible display panel at a plurality of positions of the portion attached to the first cylindrical surface so as to obtain a plurality of visual angle data, wherein the plurality of positions of the portion attached to the flexible display panel and the first cylindrical surface correspond to different positions on the alignment line of the first cylindrical surface. The technical scheme provided by the embodiment of the invention can realize the visual angle color cast test of the flexible display panel.
Description
Technical Field
The invention relates to the technical field of testing, in particular to a testing jig and a testing method for a flexible display panel.
Background
Since the advent of organic light emitting display technology, the organic light emitting display technology has gradually replaced liquid crystal display because of its advantages of wide viewing angle, high contrast, wide color gamut, fast response speed, and the like. The flexible display screen has a series of advantages of impact resistance, strong shock resistance, light weight, small volume, wearing and the like. The flexible display screen has good bending property and can realize curved surface display.
In order to ensure the product quality, visual character bias test needs to be carried out on the flexible display panel so as to reflect the difference of colors of the flexible display panel under different observation angles.
Disclosure of Invention
The embodiment of the invention provides a testing jig and a testing method for a flexible display panel, which are used for realizing visual angle color cast testing of the flexible display panel.
In a first aspect, an embodiment of the present invention provides a testing fixture for a flexible display panel, including:
the bearing module is provided with a first surface which is used for being attached to the flexible display panel, the first surface of the bearing module comprises a first cylindrical surface, and the slope of a tangent line of the first cylindrical surface at each position along the extending direction of the tangent line is gradually increased or gradually decreased;
the light collection module is used for collecting light emitted by the flexible display panel at a plurality of positions of the portion attached to the first cylindrical surface so as to acquire a plurality of visual angle data, wherein the plurality of positions of the portion attached to the flexible display panel and the first cylindrical surface correspond to different positions on the quasi-line of the first cylindrical surface. Different positions on the quasi-line of the first cylindrical surface correspond to different visual angles, so that visual angle color cast test of the flexible display panel is realized.
Further, the light collecting module is a line scanning type light collecting module or a surface scanning type light collecting module so as to collect light emitted from a plurality of positions of the part, which is attached to the first cylindrical surface, of the flexible display panel simultaneously, so that simultaneous testing of a plurality of visual angles is realized, and testing efficiency is improved.
Further, the quasi line of the first cylindrical surface comprises a first curve segment, any two points of which tangential angles are different by one degree on the first curve segment, the projection distance in the first direction is equal to a preset distance, the first direction is perpendicular to the direction of a straight bus of the first cylindrical surface, the first direction is perpendicular to the collection direction of the light collection module, and the direction of the straight bus of the first cylindrical surface is perpendicular to the collection direction of the light collection module, so that the linear conversion of the angle and the transverse distance is realized.
Further, the guideline of the first cylindrical surface further comprises a second curve segment, a first end point of the first curve segment is connected with the second curve segment, and the first curve segment and the second curve segment are symmetrical about a first symmetry axis; the first symmetry axis is perpendicular to and passes through a tangent of the first end point of the first curve segment. The bearing modules are arranged in a symmetrical structure so as to average test data, and the influence of uneven display brightness on viewing angle data caused by line impedance (IR-drop) of the data lines of the flexible display panel is reduced.
Further, the equation for the first curve segment is:
wherein, coordinate axis corresponding to coordinate x is parallel to tangent line of the first end point of the first curve segment; coordinate axis corresponding to coordinate y is perpendicular to tangent line of first end point of first curve segment; the origin of coordinates is the first end point of the first curve segment; l=θ m * step, which is the projection distance between any two points with tangential angles differing by one degree on the quasi-line of the first cylindrical surface on the coordinate axis corresponding to the coordinate x; θ m Is the absolute value of the difference in angle between the tangent line at the second end of the first curve segment and the tangent line at the first end of the first curve segment.
Further, the first surface of the carrier module further comprises: the second column surface and the third column surface are positioned on two opposite sides of the first column surface, and a straight bus of the first column surface, a straight bus of the second column surface and a straight bus of the third column surface are parallel; the second column surface is connected with the first side of the first column surface, and the change trend of the slope of the tangent line at each position of the second column surface along the extending direction is opposite to the change trend of the slope of the tangent line at each position of the first column surface along the extending direction; the third cylindrical surface is connected with the second side of the first cylindrical surface, and the change trend of the slope of the tangent line at each position of the third cylindrical surface along the extending direction of the third cylindrical surface is opposite to the change trend of the slope of the tangent line at each position of the first cylindrical surface along the extending direction of the first cylindrical surface. Through setting up second cylinder and third cylinder, be favorable to the screen body crooked and fixed.
Further, the testing jig of the flexible display panel further includes: the pressing module is provided with a second surface, and the first surface of the bearing module is complementary with the second surface of the pressing module in shape. The flexible display panel is pressed by the matched complementary structure so as to enhance the laminating effect.
Further, the first cylindrical surface is convex. Compared with the situation that the first cylindrical surface is set to be concave, the first cylindrical surface is convex, and the situation that the test effect is affected due to reflection of light emitted after the flexible display panel is attached to the concave can be avoided.
In a second aspect, an embodiment of the present invention further provides a method for testing a flexible display panel based on the testing fixture for a flexible display panel provided in any embodiment of the present invention, including:
attaching the flexible display panel to the first surface of the bearing module;
the light emitted by the light collecting module at a plurality of positions of the part, which is attached to the first cylindrical surface, of the flexible display panel is collected to obtain a plurality of visual angle data, wherein the plurality of positions of the part, which is attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the alignment line of the first cylindrical surface.
Further, when the guideline of the first cylinder further includes a second curve segment, the first curve segment includes a plurality of first locations and the second curve segment includes a plurality of second locations;
collecting light emitted from a plurality of positions of the portion of the flexible display panel attached to the first cylindrical surface through the light collecting module, so as to obtain a plurality of view angle data includes:
collecting light emitted by a position of the flexible display panel corresponding to a first position on the first curve segment through a light collecting module so as to obtain first optical data;
collecting light emitted by a position of the flexible display panel corresponding to a second position on the second curve segment through the light collecting module so as to obtain second optical data, wherein the first position and the second position are symmetrical about a first symmetry axis;
determining a viewing angle data based on an average of the first optical data and the second optical data; or, determining first viewing angle data according to the first optical data; determining second viewing angle data from the second optical data; the average value of the first view angle data and the second view angle data is taken as final one view angle data.
The testing jig for the flexible display panel in the technical scheme of the embodiment of the invention comprises a bearing module and a light acquisition module, wherein the bearing module is provided with a first surface which is used for being attached to the flexible display panel, the first surface of the bearing module comprises a first cylindrical surface, and the slope of a tangent line of the first cylindrical surface at each position along the extending direction of the tangent line is gradually increased or gradually decreased; the light acquisition module is used for acquiring light emitted by a plurality of positions of the part, which is attached to the first cylindrical surface, of the flexible display panel so as to acquire a plurality of visual angle data, wherein the plurality of positions of the part, which is attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the quasi-line of the first cylindrical surface, and the different positions on the quasi-line of the first cylindrical surface correspond to different visual angles, so that visual angle color cast test of the flexible display panel is realized.
Drawings
Fig. 1 is a schematic structural diagram of a testing fixture for a flexible display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a test structure according to an embodiment of the present invention;
FIG. 3 is a side view of a test view angle of 0 degrees according to an embodiment of the present invention;
FIG. 4 is a side view of a test view angle of greater than 0 degrees according to an embodiment of the present invention;
fig. 5 is a side view of a testing fixture for a flexible display panel according to an embodiment of the present invention;
FIG. 6 is a side view of a testing fixture for a flexible display panel according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a load-bearing module according to an embodiment of the present invention;
FIG. 8 is a side view of a testing fixture for a flexible display panel according to another embodiment of the present invention;
FIG. 9 is a graph showing the relationship between each position on the alignment of the first cylindrical surface of the carrier module of FIG. 8 and the viewing angle;
FIG. 10 is a schematic view of the alignment line of the first cylindrical surface of the carrier module of FIG. 8 in a reference frame;
FIG. 11 is a graph showing the relationship between each position on the alignment of the first cylindrical surface of the load bearing module and the viewing angle when the first curved section is a circular arc;
fig. 12 is a schematic structural diagram of a lamination module according to an embodiment of the present invention;
fig. 13 is a schematic diagram of a carrier module and a pressing module when pressing a flexible display panel according to an embodiment of the present invention;
fig. 14 is a flowchart of a testing method of a flexible display panel according to an embodiment of the present invention;
FIG. 15 is a flowchart of a testing method of a flexible display panel according to another embodiment of the present invention;
fig. 16 is a flowchart of a testing method of another flexible display panel 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.
The embodiment of the invention provides a testing jig for a flexible display panel. Fig. 1 is a schematic structural diagram of a testing fixture for a flexible display panel according to an embodiment of the present invention. The testing jig of the flexible display panel can be used for performing visual character bias testing on the flexible display panel. The test fixture of this flexible display panel includes: a carrier module 10 and a light collection module 20.
The bearing module 10 is provided with a first surface for being attached to the flexible display panel 1, the first surface of the bearing module 10 includes a first cylindrical surface 11, and the slope of a tangent line at each position of the alignment line of the first cylindrical surface 11 along the extending direction of the first cylindrical surface is gradually increased or gradually decreased. The non-display side of the flexible display panel 1 may be attached to the first surface of the carrier module 10.
The light collecting module 20 is configured to collect light emitted from a plurality of positions of a portion of the flexible display panel 1 attached to the first cylindrical surface 11, so as to obtain a plurality of view angle data, where the plurality of positions of the portion of the flexible display panel 1 attached to the first cylindrical surface 11 correspond to different positions on a quasi-line of the first cylindrical surface 11.
The cylindrical surface (cylinder) corresponds to a curved surface formed by parallel movement of a straight line (which may be called a straight generatrix) along a fixed curve (which may be called a quasi-line). The extending direction of the cylindrical surface corresponds to the extending direction of the straight generatrix of the cylindrical surface. The alignment of the cylinder corresponds to the cross-sectional profile curve of the cylinder, and the cross section where the cross-sectional profile curve is located is perpendicular to the straight generatrix of the cylinder. The first cylindrical surface 11 may include one of the following: the guideline is a cylindrical surface of a section of circular arc, the guideline is a cylindrical surface of a section of elliptical arc, and the like. The light collection module 20 may be a point scan light collection module. The light collection module 20 may be a spectrometer. The light collection module 20 collects light emitted from a plurality of positions of the flexible display panel 1 in parallel, for example, in a vertical direction. The collection direction (or lens direction) of the light collection module 20 may be perpendicular to the straight generatrix of the first cylindrical surface 11. If the light collecting module 20 is a point scanning light collecting module, the moving direction of the light collecting module 20 may be perpendicular to the collecting direction of the light collecting module 20, and the moving direction of the light collecting module 20 may be perpendicular to the straight bus of the first cylindrical surface 11. Different positions on the alignment of the first cylindrical surface 11 may correspond to different viewing angles. The light collection module 20 may include a charge coupled device image sensor (charge coupled device, CCD).
Fig. 2 is a schematic structural diagram of a test according to an embodiment of the present invention. Fig. 3 is a side view of a test view angle of 0 degrees according to an embodiment of the present invention. Fig. 4 is a side view of a test view angle of greater than 0 degrees according to an embodiment of the present invention. As shown in fig. 1 to 4, the straight bus (not shown in the drawings) of the first cylindrical surface 11 is parallel to the direction Z, the collecting direction of the light collecting module 20 is parallel to the direction Y, and the tangent line of one end O of the alignment line of the first cylindrical surface 11 may be perpendicular to the collecting direction of the light collecting module 20, which corresponds to the viewing angle of 0 degrees, and at this time, the light emitted from the flexible display panel 1 at the O-point is collected to obtain the chromaticity and the brightness of the light, so as to obtain the viewing angle data of 0 degrees. If the light collecting module 20 is a point scanning type light collecting module, the light collecting module 20 can be moved along the direction X, so that the collecting direction of the light collecting module 20 is aligned with other points on the alignment line of the first cylindrical surface 11, for example, the point a can be set, the viewing angle θ can be 30 degrees, 45 degrees or 60 degrees, and the light emitted by the flexible display panel at the point a is collected at this time, so as to obtain the chromaticity and the brightness of the light, and further obtain the viewing angle data with the viewing angle θ. Since the slope of the alignment line of the first cylindrical surface 11 gradually increases or gradually decreases, the collection direction of the light collection module 20 is unchanged, that is, the collection directions of the light emitted from different positions of the portion where the light collection module 20 collects the flexible display panel and the first cylindrical surface are attached are parallel, and along with the movement of the light collection module 20, the viewing angle θ will gradually increase or gradually decrease, so as to realize the test under multiple viewing angles. The distance D of the light collection module 20 can be controlled according to the relationship between the position and the viewing angle, so as to test each viewing angle step by step. The distance between the light acquisition module and the flexible display panel can be adjusted as required to ensure optimal focal length and clear imaging.
The perspective data may include JNCD (Just notable color difference) values. JNCD value can be measured by testing the CIE of white light (monochrome) at various angles and by the formulaCalculated, wherein the color coordinates (u) of the light collected when the viewing angle is θ θ ',v θ ') color coordinates (u) of the light collected at 0 degree viewing angle 0 ',v 0 '). The smaller the JNCD value, the better the visual perception is generally.
The testing jig for the flexible display panel in the technical scheme of the embodiment comprises a bearing module and a light acquisition module, wherein the bearing module is provided with a first surface which is used for being attached to the flexible display panel, the first surface of the bearing module comprises a first cylindrical surface, and the slope of a tangent line of the first cylindrical surface at each position along the extending direction of the tangent line is gradually increased or gradually decreased; the light acquisition module is used for acquiring light emitted by a plurality of positions of the part, which is attached to the first cylindrical surface, of the flexible display panel so as to acquire a plurality of visual angle data, wherein the plurality of positions of the part, which is attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the quasi-line of the first cylindrical surface, and the different positions on the quasi-line of the first cylindrical surface correspond to different visual angles, so that visual angle color cast test of the flexible display panel is realized.
Optionally, based on the foregoing embodiment, fig. 5 is a side view of a testing fixture for a flexible display panel according to an embodiment of the present invention, and the light collecting module 20 is a line scanning light collecting module. The line scanning type light collecting module 20 may include a plurality of point scanning type light collecting units 21 arranged in a line. The arrangement direction of the plurality of spot scanning type light collecting units 21 on the line scanning type light collecting module 20 corresponds to the extending direction (or scanning direction) of the line scanning type light collecting module 20. The extending direction (i.e. the scanning direction) of the line scanning type light collecting module is not parallel to the straight generatrix of the first cylindrical surface 11. The extending direction (i.e., the scanning direction) of the line scanning light collecting module may be perpendicular to the straight generatrix of the first cylindrical surface 11. The extending direction (i.e. scanning direction) of the line scanning type light acquisition module is perpendicular to the acquisition direction. The line scanning type light acquisition module can acquire light emitted from a plurality of positions of the part, which is attached to the first cylindrical surface 11, of the flexible display panel 1 simultaneously, so that simultaneous testing of a plurality of visual angles is realized, testing efficiency is improved, the visual angle testing range is large, the problems that in the prior art, through rotating the display panel and fixing a testing probe, testing of different visual angles is realized, a mass production line can only normally test screen viewing angles of 30 DEG, 45 DEG and 60 DEG, the testing can be applied to monitoring of a large number of screen bodies of the mass production line, but the phenomena of small visual angle color bias powder, large visual angle track return and the like cannot be judged, and the debugging of the visual angles is unfavorable are solved.
Optionally, the light collecting module 20 is a surface scanning light collecting module. The surface scanning type light ray collecting module can collect light emitted from a plurality of positions of the part, which is attached to the first cylindrical surface 11, of the flexible display panel 1 at the same time, so that simultaneous testing of a plurality of visual angles is realized, the testing efficiency is improved, and the visual angle testing range is large. The surface scanning type light ray collecting module collects light emitted from different positions of the part, where the flexible display panel is attached to the first cylindrical surface, in parallel.
Optionally, the collecting direction of the light collecting module 20 is perpendicular to a tangent line of the first end point of the first curve segment a, that is, the viewing angle corresponding to the first end point of the first curve segment a is 0 degrees. The viewing angle is varied from 0 to achieve testing for small viewing angle color cast. Any two points on the first curve section a, the tangential angles of which differ by one degree, are equal in projection distance on the tangential line of the first end point of the first curve section a.
Optionally, with continued reference to fig. 5, the alignment of the first cylindrical surface 11 includes a first curve segment a, where the tangential angles of the first curve segment a differ by any two points by one degree, and the distance of projection in the first direction (which may be parallel to the direction X) is equal to the preset distance step, where the first direction is perpendicular to the direction of the straight generatrix of the first cylindrical surface 11, where the first direction is perpendicular to the collection direction of the light collection module 20, and where the direction of the straight generatrix of the first cylindrical surface 11 is perpendicular to the collection direction of the light collection module 20. I.e. the viewing angle and the lateral distance can achieve a linear transformation. The method is equivalent to that the viewing angle θ is increased by one degree, and the point scanning type light collecting module 20 is moved by a preset distance step along the direction X, or the viewing angle θ is decreased by one degree, and the point scanning type light collecting module 20 is moved by a preset distance step along the direction X. The viewing angles corresponding to the light rays collected by the two point scanning type light ray collecting units 21, which are spaced apart from each other by a predetermined distance step, are different by 1 degree from each other on the line scanning type light ray collecting module 20. The viewing angles corresponding to the light rays collected by the two point scanning type light ray collecting units, which are spaced N times the preset distance step, on the line scanning type light ray collecting module 20 differ by N degrees, wherein N is an integer or a decimal, and N is greater than 0. The first cylindrical surface shown in fig. 5 has a more uniform rate of change of the viewing angle in the X direction, and the small viewing angle test and the large viewing angle test have high angular accuracy, compared to the first cylindrical surface having the alignment line shown in fig. 4 as a circular arc. The alignment line of the first cylindrical surface shown in fig. 4 is near the first end point O, the change rate of the viewing angle along the X direction is smaller, the change rate of the viewing angle along the X direction is larger, the change rate of the viewing angle along the X direction is uneven, and the change rate of the viewing angle along the X direction is too large, so that the angle accuracy of the large viewing angle test is poor.
Alternatively, with continued reference to fig. 5, based on the above embodiments, the equation for the first curve segment a is:
wherein, the coordinate axis corresponding to the coordinate x is parallel to the tangent line of the first endpoint of the first curve section a; the coordinate axis corresponding to the coordinate y is perpendicular to the tangent line of the first endpoint O of the first curve segment a; the origin of coordinates is the first endpoint O of the first curve segment a; l=θ m * step, which is the projection distance between any two points with tangential angles differing by one degree on the quasi-line of the first cylindrical surface 11 on the coordinate axis corresponding to the coordinate x; θ m Is the absolute value of the difference in angle between the tangent of the second end point P of the first curve segment a and the tangent of the first end point O of the first curve segment a.
Wherein, the coordinate axis corresponding to the coordinate X may be parallel to the direction X. The coordinate axis corresponding to the coordinate Y may be parallel to the direction Y. The larger the step, the smaller the rate of change of viewing angle along the X-direction. The length of the first curve segment a is related to step and the viewing angle test range. Since the flexible display panel 1 has a limited length, step cannot be too large, otherwise the viewing angle test range is affected. Alternatively, step may be 0.29 mm, corresponding to a decrease or increase in the angle of inclination of the curved surface of the corresponding location with a lateral distance of 0.29 mm. θ m Can be smaller than 90 degrees, theta m Is a positive integer. θ m The larger the viewing angle test range is, the larger the viewing angle test range is. Alternatively, θ m May be 80 degrees. Step and θ can be set as required m The embodiment of the present invention is not limited thereto. Conventional viewing angle testing can test 0-80 deg., 5 deg. apart for a total of 17 angles. The first cylindrical surface 11 may be formed by 3D printing or a numerical control machining process or the like. If the viewing angle change does not need to be tested from 0, only the cylindrical surface area corresponding to a part of the first curve segment a in fig. 5 may be set. Because the formula has universality, theta m And the angle of θ may be an integer or a fraction. But to ensure consistency of conventional product testing requirements, θ will typically be m Set to 80.
Optionally, based on the above embodiment, fig. 6 is a side view of a testing fixture of another flexible display panel according to an embodiment of the present invention, where the carrier module 10 is provided with two first cylindrical surfaces 11. The viewing angle test ranges of the two first cylinders are the same. Alternatively, the directors of the two first cylindrical surfaces 11 may be symmetrical about a second symmetry axis (not shown in the figure), which may be parallel to the collection direction of the light collection module 20. The straight generatrices of the two first cylinders 11 are parallel. The flexible display panel 1 is attached to the first cylindrical surface 11, and the extending direction of the data line (which is arranged to intersect with the scanning line on the flexible display panel) on the flexible display panel 1 is parallel to the extending direction of the alignment line of the first cylindrical surface 11. The average value of the view angle data corresponding to the same view angle on the two first cylindrical surfaces 11 is calculated as the final view angle data of the view angle, so that the influence of uneven display brightness on the view angle data caused by the line impedance (IR-drop) of the data line is reduced. For example, the first cylinder 11-1 is used to obtain the view angle data corresponding to the view angle θ1 as JNCD11 and the view angle data corresponding to the view angle θ2 as JNCD12; the view angle data corresponding to the view angle θ1 obtained through the first cylindrical surface 11-2 is JNCD21, the view angle data corresponding to the view angle θ2 is JNCD22, and the final view angle data corresponding to the view angle θ1 is jncd1= (jncd11+jncd21)/2; the final view data corresponding to the view θ2 is jncd2= (jncd12+jncd22)/2. The viewing angles θ1 and θ2 may be integers or fractions.
Optionally, based on the foregoing embodiment, fig. 7 is a schematic structural diagram of a carrying module provided by the embodiment of the present invention, and fig. 8 is a side view of a testing fixture of another flexible display panel provided by the embodiment of the present invention, where the alignment line of the first cylindrical surface 11 further includes a second curve segment b.
Wherein the first end point O of the first curve segment a is connected to the second curve segment b, the first curve segment a and the second curve segment b are symmetrical about a first symmetry axis (not shown in the figures). The first symmetry axis is parallel to the collection direction of the light collection module 20 and passes through the first end point O of the first curve segment a. The first symmetry axis is perpendicular to and passes through the tangent of the first end point O of the first curve segment a.
The tangent line of the first end point O of the first curve segment a may be perpendicular to the collecting direction of the light collecting module 20. The first curve section a and the second curve section b are adjacently arranged, so that the length of the line scanning type light acquisition module can be reduced. The first cylindrical surface 11 is arranged in a symmetrical structure to average test data, and reduce the line resistance (IR-drop) of the data lines of the flexible display panel, which results in the influence of uneven display brightness on viewing angle data.
Fig. 9 is a diagram showing the relationship between each position on the alignment line of the first cylindrical surface of the carrier module in fig. 8 and the viewing angle. The viewing angles of the symmetrical positions on the first curve segment a and the second curve segment b are equal, and the viewing angles on the first curve segment a and the second curve segment b are uniformly increased. The greater the viewing angle at locations on the first curve segment a and the second curve segment b further from the first end point O. It should be noted that, in the coordinate system shown in fig. 9, the equation of the first curve segment a is:the equation for the second curve segment b is: />If the positive direction of the coordinate axis x in fig. 9 is reversed, the equation of the first curve segment a is: />The equation for the second curve segment b is:wherein the first cylinder 11 has a height in direction Y +.>The width 2L of the first cylindrical surface 11 in the direction X. It should be noted that, the equation of the corresponding first curve segment a is different when the position of the origin of coordinates is different, as shown in fig. 10, fig. 10 is a schematic diagram of the alignment of the first cylindrical surface of the bearing module in fig. 8 in a reference coordinate system, where the equation of the first curve segment a is:
fig. 11 is a corresponding diagram of positions on a quasi-line of a first cylindrical surface of a bearing module and a viewing angle when the first curve segment is a circular arc. The viewing angles on the first curve segment a and the second curve segment b are not uniformly increased. The viewing angle at a position further from the first end point O on the first curve segment a and the second curve segment b changes faster with the lateral distance.
Optionally, with continued reference to fig. 8, based on the above embodiment, the first surface of the carrier module 10 further includes: the second column surface 12 and the third column surface 13 are positioned on two opposite sides of the first column surface 11, and a straight bus of the first column surface 11, a straight bus of the second column surface 12 and a straight bus of the third column surface 13 are parallel; the second cylindrical surface 12 is connected to the first side of the first cylindrical surface 11, and the change trend of the slope of the tangent line at each position of the alignment line of the second cylindrical surface 12 along the extending direction thereof is opposite to the change trend of the slope of the tangent line at each position of the alignment line of the first cylindrical surface 11 along the extending direction thereof; the third cylindrical surface 13 is connected to the second side of the first cylindrical surface 11, and the change trend of the slope of the tangent line at each position of the directrix of the third cylindrical surface 13 along the extending direction thereof is opposite to the change trend of the slope of the tangent line at each position of the directrix of the first cylindrical surface 11 along the extending direction thereof.
Wherein the second cylinder 12 may be concave. The directrix of the second cylinder surface 12 may be a 1/4 circular arc. The directrix of the second cylinder 12 may also be a 1/4 elliptical arc or the like. The third cylindrical surface 13 may be concave. The directrix of the third cylinder 13 may be a 1/4 circular arc. The directrix of the third cylinder 13 may also be a 1/4 elliptical arc or the like. By arranging the second cylindrical surface 12 and the third cylindrical surface 13, the screen body is beneficial to bending and fixing.
Alternatively, the first surface of the carrier module 10 may be provided with a plurality of through holes. The testing jig of the flexible display panel may further include a vacuum adsorption module, which may include a vacuum suction unit and a plurality of suction nozzles, the suction ends of the suction nozzles may pass through the through holes of the first surface of the carrier module 10 to contact the flexible display panel, so as to firmly fix the flexible display panel on the first surface of the carrier module in a vacuum adsorption manner. One end of the suction nozzle, which is far away from the adsorption end, can be connected with the vacuumizing unit.
Optionally, based on the foregoing embodiment, fig. 12 is a schematic structural diagram of a lamination module provided in the embodiment of the present invention, and the testing fixture for a flexible display panel further includes: the pressing module 30, the pressing module 30 is provided with a second surface 31, and the first surface of the carrying module 10 and the second surface 31 of the pressing module 30 are complementary in shape. In order to enhance the bonding effect, a jig with a complementary structure is designed for pressing the screen body. As shown in fig. 12, fig. 13 is a schematic diagram of the flexible display panel pressed by the carrier module and the pressing module according to the embodiment of the invention, after the pressing is completed, the pressing module 30 is taken away, the flexible display panel is lightened, chromaticity and brightness at different positions are tested by a surface scanning or spectrometer device, and the chromaticity and brightness can be converted into view characteristic data according to the relationship between the positions and angles.
Optionally, on the basis of the foregoing embodiment, with continued reference to fig. 5 or fig. 7, the first cylindrical surface 11 is a convex surface, and compared with the case where the first cylindrical surface is set to be a concave surface, the situation that the test effect is affected due to reflection of light emitted by the flexible display panel attached to the concave surface can be avoided. The first cylindrical surface 11 is convex, and the light emitted by the flexible display panel after being attached to the convex surface will not be reflected.
The embodiment of the invention provides a testing method of a flexible display panel. Fig. 14 is a flowchart of a testing method of a flexible display panel according to an embodiment of the present invention. The testing method of the flexible display panel is realized based on the testing jig of the flexible display panel provided by any embodiment of the invention. On the basis of the above embodiment, the testing method of the flexible display panel includes:
step 110, attaching the flexible display panel to the first surface of the carrying module.
Step 120, collecting light emitted from a plurality of positions of the portion, where the flexible display panel is attached to the first cylindrical surface, by using the light collecting module, so as to obtain a plurality of view angle data, where the plurality of positions of the portion, where the flexible display panel is attached to the first cylindrical surface, correspond to different positions on a quasi-line of the first cylindrical surface.
Referring to fig. 5, the included angle between the light emitted from the position where the flexible display panel is attached to the B position of the alignment line of the first cylindrical surface 11 and the collection direction of the light collection module 20 is θ1, that is, the corresponding viewing angle is θ1. The included angle between the light emitted from the position where the flexible display panel is attached to the C position of the alignment line of the first cylindrical surface 11 and the collection direction of the light collection module 20 is θ2, that is, the corresponding viewing angle is θ2. Different positions on the alignment of the first cylindrical surface 11 correspond to different viewing angles. The distance between the B position and the projection of the first endpoint O in the direction X is d1=θ1×step, and the distance between the c position and the projection of the first endpoint O in the direction X is d1+d2=θ2×step.
The method for testing the flexible display panel provided by the embodiment of the invention is realized based on the testing jig for the flexible display panel provided by any embodiment of the invention, so that the method for testing the flexible display panel provided by the embodiment of the invention also has the beneficial effects described in the embodiment, and is not repeated here.
The embodiment of the invention provides a testing method of a flexible display panel. Fig. 15 is a flowchart of a testing method of another flexible display panel according to an embodiment of the present invention. In accordance with the above embodiment, when the guideline of the first cylinder further includes a second curve segment, the first curve segment includes a plurality of first locations and the second curve segment includes a plurality of second locations. The testing method of the flexible display panel comprises the following steps:
step 210, attaching the flexible display panel to the first surface of the carrier module.
Step 220, collecting light emitted from a position of the flexible display panel corresponding to the first position on the first curve segment by the light collecting module so as to obtain first optical data.
For example, referring to fig. 8, the plurality of first positions may include a B1 position and a C1 position. The first optical data corresponding to the B1 position is (u) a-θ1 ',v a-θ1 '), the first optical data corresponding to the C1 position is (u) a-θ2 ',v a-θ2 ')。
Step 230, collecting, by the light collecting module, light emitted from a position of the flexible display panel corresponding to the second position on the second curve segment, so as to obtain second optical data, where the first position and the second position are symmetrical about the first symmetry axis.
Exemplary, referring to FIG. 8, a plurality of second positions mayTo include the B2 position and the C2 position. The B1 and B2 positions are symmetrical about a first symmetry axis. The C1 and C2 positions are symmetrical about a first symmetry axis. The second optical data corresponding to the B2 position is (u) b-θ1 ',v b-θ1 '), the second optical data corresponding to the C2 position is (u) b-θ2 ',v b-θ2 ')。
Step 240, determining a viewing angle data according to the average value of the first optical data and the second optical data.
Exemplary, see FIG. 8, which may be based on (u a-θ1 '+u b-θ1 ' s/2 and (v) a-θ1 '+v b-θ1 ')/2, and view data JNCD1 corresponding to the view θ1 is determined. Can be according to (u) a-θ2 '+u b-θ2 ' s/2 and (v) a-θ2 '+v b-θ2 ')/2, and view data JNCD2 corresponding to the view θ2 is determined.
The embodiment of the invention provides a testing method of a flexible display panel. Fig. 16 is a flowchart of a testing method of another flexible display panel according to an embodiment of the present invention. On the basis of the above embodiment, the testing method of the flexible display panel includes:
step 310, attaching the flexible display panel to the first surface of the carrier module.
Step 320, collecting, by the light collecting module, light emitted from a position of the flexible display panel corresponding to the first position on the first curve segment, so as to obtain first optical data.
Step 330, collecting, by the light collecting module, light emitted from a position of the flexible display panel corresponding to the second position on the second curve segment, so as to obtain second optical data, where the first position and the second position are symmetrical about the first symmetry axis.
Step 340, determining first view angle data according to the first optical data.
Exemplary, referring to FIG. 8, the first optical data (u a-θ1 ',v a-θ1 '), determining view data JNCD11 corresponding to the view θ1; can be based on the first optical data (u a-θ2 ',v a-θ2 '), the view data JNCD12 corresponding to the view θ2 is determined.
Step 350, determining second viewing angle data according to the second optical data.
Exemplary, referring to FIG. 8, the second optical data (u b-θ1 ',v b-θ1 '), determining view data JNCD21 corresponding to the view θ1; according to the second optical data (u b-θ2 ',v b-θ2 '), the view data JNCD22 corresponding to the view θ2 is determined.
Step 360, taking the average value of the first view angle data and the second view angle data as final view angle data.
For example, referring to fig. 8, the final view data corresponding to the view θ1 is jncd1= (jncd11+jncd21)/2; the final view data corresponding to the view θ2 is jncd2= (jncd12+jncd22)/2.
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, and that various obvious changes, rearrangements, combinations, and substitutions can be made by 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. A test fixture of flexible display panel, its characterized in that includes:
the bearing module is provided with a first surface which is used for being attached to the flexible display panel, the first surface of the bearing module comprises a first cylindrical surface, and the slope of a tangent line at each position of the alignment line of the first cylindrical surface along the extending direction of the first cylindrical surface is gradually increased or gradually decreased;
the light collecting module is used for collecting light emitted by the part, attached to the first cylindrical surface, of the flexible display panel at the same time so as to obtain a plurality of visual angle data, wherein the positions of the part, attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the quasi-line of the first cylindrical surface; the quasi line of the first cylindrical surface comprises a first curve segment, the tangential angle of the first curve segment is different by any two points by one degree, the projection distance in the first direction is equal to and equal to the preset distance, the first direction is perpendicular to the direction of a straight bus of the first cylindrical surface, the first direction is perpendicular to the collection direction of the light collection module, and the direction of the straight bus of the first cylindrical surface is perpendicular to the collection direction of the light collection module;
the light collecting module is a line scanning type light collecting module or a surface scanning type light collecting module, the line scanning type light collecting module further comprises a plurality of point scanning type light collecting units which are arranged in a row, and the distance between the line scanning type light collecting units is the difference of one degree between the visual angles corresponding to the light collected by the two point scanning type light collecting units with the preset distance.
2. The jig for testing a flexible display panel according to claim 1, wherein the guideline of the first cylindrical surface further comprises a second curve segment, a first end point of the first curve segment being connected to the second curve segment, the first curve segment and the second curve segment being symmetrical about a first symmetry axis; the first axis of symmetry is perpendicular to and passes through a tangent of the first end point of the first curvilinear segment.
3. The jig of claim 1, wherein the equation of the first curve segment is:
wherein, coordinate axis corresponding to coordinate x is parallel to tangent line of the first end point of the first curve segment; coordinate axis perpendicular to coordinate yTangent to a first end of the first curve segment; the origin of coordinates is the first endpoint of the first curve segment; l=θ m * step, which is the projection distance between any two points with tangential angles differing by one degree on the quasi-line of the first cylindrical surface on the coordinate axis corresponding to the coordinate x; θ m Is the absolute value of the difference in angle between the tangent of the second end of the first curve segment and the tangent of the first end of the first curve segment.
4. The testing jig of claim 2, wherein the first surface of the carrier module further comprises: the second column surface and the third column surface are positioned on two opposite sides of the first column surface, and a straight bus of the first column surface, a straight bus of the second column surface and a straight bus of the third column surface are parallel; the second cylinder surface is connected with the first side of the first cylinder surface, and the change trend of the slope of the tangent line at each position of the second cylinder surface along the extending direction of the second cylinder surface is opposite to the change trend of the slope of the tangent line at each position of the first cylinder surface along the extending direction of the first cylinder surface; the third cylindrical surface is connected with the second side of the first cylindrical surface, and the change trend of the slope of the tangent line at each position of the third cylindrical surface along the extending direction of the third cylindrical surface is opposite to the change trend of the slope of the tangent line at each position of the first cylindrical surface along the extending direction of the first cylindrical surface.
5. The flexible display panel testing jig of claim 1, further comprising: the pressing module is provided with a second surface, and the first surface of the bearing module is complementary with the second surface of the pressing module in shape.
6. The jig according to claim 1, wherein the first cylindrical surface is a convex surface.
7. A method for testing a flexible display panel based on the testing jig for a flexible display panel according to any one of claims 1 to 6, comprising:
attaching the flexible display panel to the first surface of the bearing module;
the light emitted by the flexible display panel and the light emitted by the light collecting module at a plurality of positions of the portion attached to the first cylindrical surface are collected simultaneously to obtain a plurality of visual angle data, wherein the plurality of positions of the portion attached to the flexible display panel and the first cylindrical surface correspond to different positions on the quasi-line of the first cylindrical surface.
8. The method of testing a flexible display panel according to claim 7, wherein when the guideline of the first cylinder further comprises a second curve segment, the first curve segment comprises a plurality of first locations, and the second curve segment comprises a plurality of second locations;
collecting, by the light collecting module, light emitted from a plurality of positions of a portion of the flexible display panel attached to the first cylindrical surface, so as to obtain a plurality of view angle data includes:
collecting light emitted by a position of the flexible display panel corresponding to a first position on the first curve segment through the light collection module so as to obtain first optical data;
collecting light emitted by a position of the flexible display panel corresponding to a second position on the second curve segment through the light collection module so as to obtain second optical data, wherein the first position and the second position are symmetrical about a first symmetry axis;
determining a viewing angle data according to an average value of the first optical data and the second optical data; or determining first view angle data according to the first optical data; determining second viewing angle data according to the second optical data; and taking the average value of the first view angle data and the second view angle data as final view angle data.
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