CN112903253A - 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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- CN112903253A CN112903253A CN202110084191.4A CN202110084191A CN112903253A CN 112903253 A CN112903253 A CN 112903253A CN 202110084191 A CN202110084191 A CN 202110084191A CN 112903253 A CN112903253 A CN 112903253A
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The embodiment of the invention discloses a test fixture and a test method for a flexible display panel. Wherein, flexible display panel's test fixture includes: the flexible display panel comprises a bearing module and a light collection 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 a collimation line of the first cylindrical surface at each position along the extension direction of the collimation line is gradually increased or gradually reduced; the light collection module is used for collecting light emitted from a plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel so as to obtain a plurality of visual angle data, wherein the plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel 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 its birth, organic light emitting display technology has gradually replaced liquid crystal display because of its advantages of wide viewing angle, high contrast, wide color gamut, and fast response speed. The flexible display screen has a series of advantages of impact resistance, strong shock resistance, light weight, small size and even being wearable. The flexible display screen has good bending property and can realize curved surface display.
In order to ensure the product quality, the flexible display panel needs to be subjected to a viewing angle color cast test to reflect the color difference of the flexible display panel under different viewing angles.
Disclosure of Invention
The embodiment of the invention provides a test fixture and a test method for a flexible display panel, which are used for realizing a visual angle color cast test of the flexible display panel.
In a first aspect, an embodiment of the present invention provides a test 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 a collimation line of the first cylindrical surface at each position along the extension direction of the collimation line is gradually increased or gradually reduced;
the light collection module is used for collecting light emitted from a plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel so as to obtain a plurality of visual angle data, wherein the plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the alignment line of the first cylindrical surface. Different positions on the alignment line of the first cylindrical surface correspond to different viewing angles, so that the viewing angle color cast test of the flexible display panel is realized.
Further, the light collection module is line scanning type light collection module or face scanning type light collection module to gather the light that sends on the part that flexible display panel and first cylinder laminating's a plurality of positions simultaneously, thereby realize the concurrent test to a plurality of visual angles, in order to improve efficiency of software testing.
Furthermore, the alignment line of the first cylindrical surface comprises a first curve segment, the tangent angle on the first curve segment has any two points with one degree difference, the distance of the projection in the first direction is equal to a preset distance, the first direction is perpendicular to the direction of the straight bus of the first cylindrical surface, the first direction is perpendicular to the acquisition direction of the light acquisition module, and the direction of the straight bus of the first cylindrical surface is perpendicular to the acquisition direction of the light acquisition module, so that the linear conversion between the angle and the transverse distance is realized.
Furthermore, the directrix of the first cylindrical surface also comprises a second curve segment, the 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 the first symmetry axis; the first axis of symmetry is perpendicular to a tangent of the first end point of the first curved segment and passes through the first end point of the first curved segment. The bearing module is arranged to be in a symmetrical structure, so that test data are averaged, and the influence of uneven display brightness on the visual angle data caused by line resistance (IR-drop) of a data line of the flexible display panel is reduced.
Further, the equation for the first curve segment is:
the coordinate axis corresponding to the coordinate x is parallel to the tangent of the first endpoint of the first curve segment; a coordinate axis corresponding to the coordinate y is perpendicular to a tangent line of a first endpoint of the first curve segment; the origin of coordinates is a first endpoint of the first curve segment; l ═ thetamStep, step is the distance of the projection of any two points with one-degree tangent angle difference on the guideline of the first cylindrical surface on the coordinate axis corresponding to the coordinate x; thetamIs the absolute value of the angular difference between the tangent to the second end point of the first curved segment and the tangent to the first end point of the first curved segment.
Further, the first surface of the carrier module further comprises: the second cylindrical surface and the third cylindrical surface are positioned on two opposite sides of the first cylindrical surface, and a straight bus of the first cylindrical surface, a straight bus of the second cylindrical surface and a straight bus of the third cylindrical surface are parallel; the second cylindrical surface is connected with the first side of the first cylindrical surface, and the change trend of the slope of the tangent at each position of the directrix of the second cylindrical surface along the extending direction is opposite to the change trend of the slope of the tangent at each position of the directrix of the first cylindrical 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 at each position of the directrix of the third cylindrical surface along the extending direction is opposite to the change trend of the slope of the tangent at each position of the directrix of the first cylindrical surface along the extending direction. And the second cylindrical surface and the third cylindrical surface are arranged, so that the screen body is beneficial to bending and fixing.
Further, the test fixture of flexible display panel still includes: the pressing module is provided with a second surface, and the shape of the first surface of the bearing module is complementary with that of the second surface of the pressing module. The flexible display panel is pressed through the matched complementary structure, so that the attaching effect is enhanced.
Further, the first cylindrical surface is convex. Compare in the condition that sets up first cylinder to the concave surface, first cylinder is the convex surface, can avoid the laminating of flexible display panel to have the reflection in the light that sends behind the concave surface, and the condition that influences the test effect takes place.
In a second aspect, an embodiment of the present invention further provides a method for testing a flexible display panel based on the test fixture for a flexible display panel provided in any embodiment of the present invention, including:
attaching a flexible display panel to a first surface of a bearing module;
the light emitted from the parts, attached to the first cylindrical surface, of the flexible display panel is collected through the light collection module so as to obtain a plurality of visual angle data, wherein the parts, 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 directrix of the first cylindrical surface further comprises a second curve segment, the first curve segment comprises a plurality of first positions, and the second curve segment comprises a plurality of second positions;
Gather the light that sends on the part's that flexible display panel and first cylinder laminating a plurality of positions through light collection module to acquire a plurality of visual angle data include:
acquiring light emitted by a position, corresponding to a first position on a first curve segment, of the flexible display panel through a light acquisition module to acquire first optical data;
acquiring light emitted by a position, corresponding to a second position on the second curve segment, of the flexible display panel through the light acquisition module to acquire second optical data, wherein the first position and the second position are symmetrical about the 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 perspective data from the first optical data; determining second perspective data from 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.
The test fixture for the flexible display panel in the technical scheme of the embodiment of the invention comprises a bearing module and a light collection 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 a collimation line of the first cylindrical surface at each position along the extension direction of the collimation line is gradually increased or gradually reduced; the light collection module is used for collecting light emitted from a plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel to obtain a plurality of visual angle data, wherein the plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the alignment line of the first cylindrical surface, and different positions on the alignment line of the first cylindrical surface correspond to different visual angles, so that a visual angle color cast test of the flexible display panel is realized.
Drawings
Fig. 1 is a schematic structural diagram of a test fixture for a flexible display panel according to an embodiment of the present invention;
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 at 0 degrees according to an embodiment of the present invention;
FIG. 4 is a side view of a test view 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 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 carrier 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 diagram showing the relationship between the positions on the alignment line of the first cylindrical surface of the carrier module in FIG. 8 and the viewing angle;
FIG. 10 is a schematic view of a collimation line of a first cylindrical surface of the carrier module in FIG. 8 under a reference coordinate system;
fig. 11 is a diagram corresponding to the relationship between each position on the alignment line of the first cylindrical surface of the carrier module and the viewing angle when the first curve segment is a segment of 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 view illustrating a flexible display panel being laminated by a carrier module and a laminating module according to an embodiment of the present invention;
fig. 14 is a flowchart of a method for testing a flexible display panel according to an embodiment of the present invention;
FIG. 15 is a flowchart illustrating a testing method for a flexible display panel according to another embodiment of the present invention;
fig. 16 is a flowchart of a testing method for a flexible display panel according to another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the invention provides a test fixture for a flexible display panel. Fig. 1 is a schematic structural diagram of a test fixture for a flexible display panel according to an embodiment of the present invention. The test fixture of the flexible display panel can be used for carrying out visual angle color cast test on the flexible display panel. This flexible display panel's test fixture 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 a directrix of the first cylindrical surface 11 along the extending direction thereof gradually increases or gradually decreases. The non-display side of the flexible display panel 1 may be attached to the first surface of the carrier module 10.
The light collection 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 to obtain a plurality of viewing 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 the alignment line of the first cylindrical surface 11.
Among them, the cylindrical surface (cylinder) is equivalent to a curved surface formed by parallel moving a straight line (which may be called a straight generatrix) along a fixed curve (which may be called a directrix). The extension direction of the cylindrical surface corresponds to the extension direction of the straight generatrix of the cylindrical surface. The directrix of the cylindrical surface is equivalent to the section profile curve of the cylindrical surface, and the section of the section profile curve is vertical to the straight generatrix of the cylindrical surface. The first cylindrical surface 11 may comprise one of: the directrix is a section of circular arc cylindrical surface, the directrix is a section of elliptic arc cylindrical surface and the like. The light collection module 20 may be a point scan type light collection module. The light collection module 20 may be a spectrometer. The collection directions of the light collected by the light collection module 20 at the multiple positions of the flexible display panel 1 are parallel, and may be vertical, for example. 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 collection module 20 is a point scanning type light collection module, the moving direction of the light collection module 20 may be perpendicular to the collection direction of the light collection module 20, and the moving direction of the light collection module 20 may be perpendicular to the straight generatrix of the first cylindrical surface 11. Different positions on the directrix of the first cylindrical surface 11 may correspond to different viewing angles. The light collection module 20 may include a Charge Coupled Device (CCD) image sensor.
Fig. 2 is a schematic structural diagram during testing according to an embodiment of the present invention. Fig. 3 is a side view of a test viewing angle of 0 degrees according to an embodiment of the present invention. Fig. 4 is a side view of a test viewing angle greater than 0 degrees according to an embodiment of the present invention. Referring to fig. 1 to 4, a straight generatrix (not shown in the figure) 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, a tangent line of one end O of a directrix of the first cylindrical surface 11 can be perpendicular to the collecting direction of the light collecting module 20, which is equivalent to a viewing angle of 0 degree, and at this time, light emitted by the flexible display panel 1 at the position of the O point is collected to obtain chromaticity and brightness of the light, so as to obtain viewing angle data with the viewing angle of 0 degree. If the light collection module 20 is a point scanning type light collection module, the light collection module 20 may be moved along the direction X, so that the collection direction of the light collection module 20 is aligned with other points on the alignment line of the first cylindrical surface 11, for example, the point a may be, and the viewing angle θ may be 30 degrees, 45 degrees, or 60 degrees, at this time, light emitted by the flexible display panel at the position of the point a is collected, so as to obtain chromaticity and brightness of the light, and further obtain viewing angle data with the viewing angle θ. Because the slope of the directrix 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 direction of the light emitted from the different positions of the part of the flexible display panel, which is attached to the first cylindrical surface, collected by the light collection module 20 is 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 at multiple viewing angles. The distance D that the light collection module 20 moves can be controlled according to the relationship between the position and the viewing angle, so that each viewing angle can be tested step by step. The distance between the light collection module and the flexible display panel can be adjusted according to needs, so that the best focal length and clear imaging are guaranteed.
The view angle data may include a jncd (just not table color difference) value. The JNCCD value can be determined by testing the CIE of white light (monochrome) at various angles and by formula
Calculating the color coordinate (u) of the collected light ray when the visual angle is thetaθ',vθ') color coordinates (u) of light collected at 0 degree viewing angle0',v0'). The smaller the JNCD value, the better the visual perception is generally.
In the technical scheme of this embodiment, the test fixture for the flexible display panel includes a bearing module and a light collection module, wherein the bearing module is provided with a first surface for being attached to the flexible display panel, the first surface of the bearing module includes a first cylindrical surface, and a slope of a tangent line at each position of a directrix of the first cylindrical surface along an extending direction thereof is gradually increased or gradually decreased; the light collection module is used for collecting light emitted from a plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel to obtain a plurality of visual angle data, wherein the plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the alignment line of the first cylindrical surface, and different positions on the alignment line of the first cylindrical surface correspond to different visual angles, so that a visual angle color cast test of the flexible display panel is realized.
Optionally, on the basis of the above 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 collection module 20 is a line scanning type light collection module. The line scanning type light collection module 20 may include a plurality of point scanning type light collection units 21 arranged in a line. The arrangement direction of the plurality of point scanning type light collection units 21 on the line scanning type light collection module 20 corresponds to the extending direction (or scanning direction) of the line scanning type light collection module 20. The extending direction (i.e., the scanning direction) of the line scanning type light collection 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 type light collection module may be perpendicular to the straight generatrix of the first cylindrical surface 11. The extending direction (i.e. the scanning direction) of the line scanning type light collection module is perpendicular to the collection direction. The light that sends on the partial a plurality of positions that line scanning type light collection module can gather flexible display panel 1 and the laminating of first cylinder 11 simultaneously, thereby realize the simultaneous test to a plurality of visual angles, with the efficiency of software testing, and visual angle test range is big, thereby solved among the prior art through rotatory display panel, the mode of fixed test probe, the realization is to the test of different visual angles, the volume production line can only test 30 usually, 45 and 60 screen body visual angles, this kind of test can deal with the control of a large amount of screen bodies of volume production line, nevertheless to the inclined to one side powder of little visual angle colour, and phenomena such as big visual angle orbit return can't make the judgement, be unfavorable for the problem of the debugging of visual angle.
Optionally, the light collection module 20 is a surface scanning type light collection module. The surface scanning type light collection module can simultaneously collect light emitted from a plurality of positions of the part, attached to the first cylindrical surface 11, of the flexible display panel 1, so that simultaneous testing of a plurality of visual angles is realized, the testing efficiency is improved, and the visual angle testing range is wide. The surface scanning type light collection module collects light emitted from different positions of the part, attached to the first cylindrical surface, of the flexible display panel in a parallel mode.
Optionally, the collecting direction of the light collecting module 20 is perpendicular to a tangent line of the first endpoint of the first curve segment a, that is, the viewing angle corresponding to the first endpoint of the first curve segment a is 0 degree. The viewing angle was changed from 0 to enable testing for small apparent character bias. The projection distance on the tangent of the first end point of the first curve segment a is equal when the tangent angle on the first curve segment a differs from any two points by one degree.
Optionally, on the basis of the foregoing embodiment, with continued reference to fig. 5, the directrix of the first cylindrical surface 11 includes a first curved line segment a, where any two points on the first curved line segment a that have a tangent angle different by one degree are included, a distance of a projection in a first direction (which may be parallel to the direction X) is equal to a preset distance step, the first direction is perpendicular to a direction of a straight generatrix of the first cylindrical surface 11, the first direction is perpendicular to the collecting direction of the light collection module 20, and a direction of a straight generatrix of the first cylindrical surface 11 is perpendicular to the collecting direction of the light collection module 20. I.e. the viewing angle and the lateral distance can achieve a linear transformation. In other words, if the angle of view θ is increased by one degree, the point scanning type light collection module 20 is only required to be moved by the preset distance step along the direction X, or if the angle of view θ is decreased by one degree, the point scanning type light collection module 20 is only required to be moved by the preset distance step along the direction X. The difference between the viewing angles corresponding to the light collected by the two point scanning type light collecting units 21 with the preset distance step on the line scanning type light collecting module 20 is 1 degree. The difference between the viewing angles corresponding to the light collected by the two point scanning type light collection units on the line scanning type light collection module 20, where the distance between the two point scanning type light collection units is N times of the preset distance step, is N degrees, where N is an integer or a decimal, and N is greater than 0. Compared with the first cylindrical surface shown in fig. 4 in which the directrix is a segment of circular arc, the first cylindrical surface shown in fig. 5 has a more uniform change rate of the viewing angle along the X direction, and the angle accuracy of the small viewing angle test and the large viewing angle test is high. The directrix of the first cylindrical surface shown in fig. 4 is near the first endpoint O, the change rate of the viewing angle along the X direction is small, the directrix of the first cylindrical surface is far away from the other end of the first endpoint O, the change rate of the viewing angle along the X direction is large, the change rate of the viewing angle along the X direction is not uniform, and the change rate of the viewing angle along the X direction is too large, so the angle accuracy of the large viewing angle test is poor.
Alternatively, with continued reference to fig. 5 on the basis of the above embodiment, the equation for the first curve segment a is:
the coordinate axis corresponding to the coordinate x is parallel to the tangent of the first endpoint of the first curve segment a; the coordinate axis corresponding to the coordinate y is vertical to the tangent line of the first endpoint O of the first curve segment a; the origin of coordinates is a first endpoint O of the first curve segment a; l ═ thetamStep, step is the distance of the projection of any two points with one degree of tangent angle difference on the guideline of the first cylindrical surface 11 on the coordinate axis corresponding to the coordinate x; thetamIs the absolute value of the angular difference between the tangent to the second end point P of the first curved segment a and the tangent to the first end point O of the first curved 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 the viewing angle in 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, which corresponds to a position where the slope angle of the curved surface decreases or increases by 1 ° with a movement of 0.29 mm in the lateral direction. ThetamMay be less than 90 degrees, theta mIs a positive integer. ThetamThe larger the viewing angle test range. Optionally, thetamMay be 80 degrees. Step and theta can be set as desiredmThe embodiment of the present invention is not limited thereto. Often timesRegular visual angle tests can test 0-80 degrees, 5 degrees apart, and 17 angles in total. The first cylindrical surface 11 may be formed by 3D printing or a numerical control machining process. If the viewing angle variation does not need to be tested from 0, only the cylindrical area corresponding to a part of the first curve segment a in fig. 5 may be set. Since the formula has universality, thetamThe angle of θ may be an integer or a decimal. But to ensure consistency in the testing requirements of conventional products, θ will typically bemSet to 80.
Optionally, on the basis of the above embodiment, fig. 6 is a side view of a testing fixture for a flexible display panel according to another embodiment of the present invention, and the bearing module 10 is provided with two first cylindrical surfaces 11. The visual angle test ranges of the two first cylindrical surfaces are the same. Alternatively, the alignment lines of the two first cylindrical surfaces 11 are symmetrical about a second symmetry axis (not shown), which may be parallel to the collection direction of the light collection module 20. The straight generatrices of the two first cylindrical surfaces 11 are parallel. The flexible display panel 1 is attached to the first cylindrical surface 11, and the extending direction of the data lines (arranged to cross the scanning lines on the flexible display panel in an insulated manner) on the flexible display panel 1 is parallel to the extending direction of the alignment lines on 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 to be used as the final view angle data of the view angle, so that the influence of the display brightness unevenness on the view angle data caused by the line impedance (IR-drop) of the data lines is reduced. Illustratively, the view angle data corresponding to the view angle θ 1 obtained through the first cylinder 11-1 is JNCD11, and the view angle data corresponding to the view angle θ 2 is JNCD 12; if the obtained view angle data corresponding to the view angle θ 1 is JNCD21 and the obtained view angle data corresponding to the view angle θ 2 is JNCD22 through the first cylindrical surface 11-2, the final view angle data corresponding to the view angle θ 1 is JNCD1 ═ JNCD11+ JNCD 21)/2; the final view data corresponding to the view θ 2 is JNCD2 ═ JNCD12+ JNCD 22)/2. The viewing angle θ 1 and the viewing angle θ 2 may be an integer or a decimal.
Optionally, on the basis of the foregoing embodiment, fig. 7 is a schematic structural diagram of a carrier module according to an embodiment of the present invention, fig. 8 is a side view of a test fixture for a flexible display panel according to an embodiment of the present invention, and the directrix of the first cylindrical surface 11 further includes a second curve segment b.
Wherein the first end O of the first curve segment a is connected to the second curve segment b, and the first curve segment a and the second curve segment b are symmetrical with respect to the first symmetry axis (not shown in the figure). The first symmetry axis is parallel to the collection direction of the light collection module 20 and passes through the first end O of the first curve segment a. The first axis of symmetry is perpendicular to a tangent of the first end O of the first curved segment a and passes through the first end O of the first curved segment a.
A tangent 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 arranged adjacently, so that the length of the line scanning type light collection 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 display brightness unevenness on the viewing angle data.
Fig. 9 is a diagram illustrating a relationship between positions on a directrix of the first cylindrical surface of the carrier module in fig. 8 and viewing angles. 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 more distant the position on the first and second curved sections a and b from the first end point O, the larger the viewing angle. 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 set to be reversed, the equation of the first curve segment a is:
the equation for the second curve segment b is:
wherein the height of the first cylindrical surface 11 in the direction Y
The width 2L of the first cylindrical surface 11 in the direction X. It should be noted that, the position selected as the origin of coordinates is different, and the corresponding equation of the first curve segment a is also different, as shown in fig. 10, fig. 10 is a schematic diagram of the directrix of the first cylindrical surface of the bearing module in fig. 8 under a reference coordinate system, and the equation of the first curve segment a is:
fig. 11 is a diagram illustrating a relationship between each position on a directrix of a first cylindrical surface of the carrier module and a viewing angle when the first curve segment is a segment of an arc. The viewing angle is not uniformly increased over the first and second curved sections a, b. The viewing angle at positions on the first and second curved segments a, b further away from the first endpoint O varies faster with lateral distance.
Optionally, on the basis of the above embodiment, with continuing reference to fig. 8, the first surface of the carrier module 10 further includes: the second cylindrical surface 12 and the third cylindrical surface 13 are positioned on two opposite sides of the first cylindrical surface 11, and a straight bus of the first cylindrical surface 11, a straight bus of the second cylindrical surface 12 and a straight bus of the third cylindrical surface 13 are parallel; the second cylindrical surface 12 is connected with the first side of the first cylindrical surface 11, and the change trend of the slope of the tangent at each position of the directrix of the second cylindrical surface 12 along the extending direction thereof is opposite to the change trend of the slope of the tangent at each position of the directrix 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 slope of the tangent line at each position of the directrix of the third cylindrical surface 13 in the extending direction thereof has a tendency of variation opposite to that of the tangent line at each position of the directrix of the first cylindrical surface 11 in the extending direction thereof.
Wherein the second cylindrical surface 12 may be concave. The alignment of the second post 12 may be an 1/4 arc. The alignment of the second post 12 may also be 1/4 elliptical arcs, etc. The third cylindrical surface 13 may be concave. The alignment of the third cylindrical surface 13 may be an 1/4 arc. The directrix of the third cylindrical surface 13 may also be an 1/4 elliptical arc or the like. By providing the second cylindrical surface 12 and the third cylindrical surface 13, the screen body is facilitated to bend and fix.
Alternatively, the first surface of the carrier module 10 may be provided with a plurality of through holes. The testing jig for the flexible display panel can further comprise a vacuum adsorption module, the vacuum adsorption module can comprise a vacuumizing unit and a plurality of suction nozzles, and the adsorption ends of the suction nozzles can penetrate through the through holes in the first surface of the bearing module 10 to be in contact with the flexible display panel so as to firmly fix the flexible display panel on the first surface of the bearing module in a vacuum adsorption mode. One end of the suction nozzle, which is far away from the adsorption end, can be connected with the vacuumizing unit.
Optionally, on the basis of the foregoing embodiment, fig. 12 is a schematic structural diagram of a stitching module according to an embodiment of the present invention, and the test fixture for a flexible display panel further includes: the press-fit module 30, the press-fit module 30 is provided with a second surface 31, and the first surface of the carrier module 10 and the second surface 31 of the press-fit 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 laminated by the carrier module 10 and the laminating module according to the embodiment of the present invention, after the lamination is completed, the laminating module 30 is taken away, the flexible display panel is lighted, and chromaticity and brightness at different positions are tested by a surface scanning or spectrometer device, and can be converted into view angle characteristic data according to the relationship between the position and the angle.
Optionally, on the basis of the foregoing embodiment, with reference to fig. 5 or fig. 7, the first cylindrical surface 11 is a convex surface, and compared with the case that the first cylindrical surface is set as a concave surface, the case that the test effect is affected due to reflection of light emitted by the flexible display panel after being attached to the concave surface can be avoided. The first cylindrical surface 11 is a convex surface, and 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 test 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 carrier module.
And 120, acquiring light emitted from a plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel through a light acquisition module to acquire a plurality of viewing angle data, wherein the plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the alignment line of the first cylindrical surface.
Referring to fig. 5, an included angle between the light emitted from the flexible display panel and the position B of the alignment line of the first cylindrical surface 11 and the collecting direction of the light collecting module 20 is θ 1, that is, the corresponding viewing angle is θ 1. The included angle between the light emitted from the flexible display panel and the position attached to the position C of the alignment line of the first cylindrical surface 11 and the collecting direction of the light collecting module 20 is θ 2, that is, the corresponding viewing angle is θ 2. Different positions on the directrix of the first cylindrical surface 11 correspond to different viewing angles. The distance between the position B and the projection of the first end point O in the direction X is D1 ═ θ 1 ═ step, and the distance between the position C and the projection of the first end point O in the direction X is D1+ D2 ═ θ 2 ═ step.
The test method for the flexible display panel provided by the embodiment of the invention is implemented based on the test fixture for the flexible display panel provided by any embodiment of the invention, so that the test method for the flexible display panel provided by the embodiment of the invention also has the beneficial effects described in the embodiments, and further description is omitted here.
The embodiment of the invention provides a testing method of a flexible display panel. Fig. 15 is a flowchart of a testing method for a flexible display panel according to another embodiment of the present invention. In addition to the above-described embodiments, when the directrix of the first cylindrical surface further comprises a second curved segment, the first curved segment comprises a plurality of first positions and the second curved segment comprises a plurality of second positions. 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, light emitted from a position of the flexible display panel corresponding to the first position on the first curve segment is collected through the light collection module 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 position B1 is (u)a-θ1',va-θ1') and the first optical data corresponding to the position of C1 is (u)a-θ2',va-θ2')。
And step 230, collecting light emitted from a position of the flexible display panel corresponding to a second position on the second curve segment through the light collection module to obtain second optical data, wherein the first position and the second position are symmetrical about the first symmetry axis.
For example, referring to fig. 8, the plurality of second positions may include a B2 position and a C2 position. The B1 position and the B2 position are symmetric about a first axis of symmetry. The C1 position and the C2 position are symmetric about a first axis of symmetry. The second optical data corresponding to the position B2 is (u)b-θ1',vb-θ1') and the second optical data corresponding to the position of C2 is (u)b-θ2',vb-θ2')。
Step 240, determining a viewing angle data according to an average value of the first optical data and the second optical data.
Exemplarily, see fig. 8, can be according to (u) a-θ1'+ub-θ1')/2 and (v)a-θ1'+vb-θ1')/2, and determines the view data JNCD1 corresponding to the view θ 1. Can be based on (u)a-θ2'+ub-θ2')/2 and (v)a-θ2'+vb-θ2')/2, and determines view data JNCD2 corresponding to view θ 2.
The embodiment of the invention provides a testing method of a flexible display panel. Fig. 16 is a flowchart of a testing method for a flexible display panel according to another 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 light emitted from a position of the flexible display panel corresponding to the first position on the first curve segment through the light collection module to obtain first optical data.
Step 330, collecting light emitted from a position of the flexible display panel corresponding to a second position on the second curve segment by the light collection module to obtain second optical data, wherein the first position and the second position are symmetrical with respect to the first symmetry axis.
Step 340, determining first angle of view data according to the first optical data.
Illustratively, referring to FIG. 8, the first optical data (u) may correspond according to the B1 positiona-θ1',va-θ1') determining view data JNCD11 corresponding to the view θ 1; first optical data (u) corresponding to the position of C1 a-θ2',va-θ2') to determine view data JNCD12 corresponding to the view θ 2.
And step 350, determining second visual angle data according to the second optical data.
Illustratively, referring to FIG. 8, the second optical data (u) may correspond according to the B2 positionb-θ1',vb-θ1') determining view data JNCD21 corresponding to the view θ 1; second optical data (u) corresponding to the position of C2b-θ2',vb-θ2') to determine view data JNCD22 corresponding to the view θ 2.
And step 360, taking the average value of the first perspective data and the second perspective data as final perspective data.
Exemplarily, referring to fig. 8, the final view data corresponding to the view θ 1 is JNCD1 ═ (JNCD11+ JNCD 21)/2; the final view data corresponding to the view θ 2 is JNCD2 ═ JNCD12+ JNCD 22)/2.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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 modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a flexible display panel's test fixture which 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 of a directrix of the first cylindrical surface at each position along the extending direction of the first cylindrical surface is gradually increased or gradually reduced;
the light collection module is used for collecting light emitted from a plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel so as to obtain a plurality of visual angle data, wherein the plurality of positions of the part, attached to the first cylindrical surface, of the flexible display panel correspond to different positions on the alignment line of the first cylindrical surface.
2. The testing fixture of claim 1, wherein the light collection module is a line scan type light collection module or a surface scan type light collection module.
3. The testing fixture of claim 1, wherein the alignment line of the first cylindrical surface comprises a first curved line segment, the tangential angle of the first curved line segment differs from any two points of a degree, the projected distance in a first direction is equal to a preset distance, the first direction is perpendicular to the direction of the straight generatrix of the first cylindrical surface, the first direction is perpendicular to the collecting direction of the light collecting module, and the direction of the straight generatrix of the first cylindrical surface is perpendicular to the collecting direction of the light collecting module.
4. The testing fixture of claim 3, wherein the directrix 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 axis of symmetry is perpendicular to a tangent of a first end point of the first curved segment and passes through the first end point of the first curved segment.
5. The testing fixture of claim 3, wherein the equation of the first curve segment is:
the coordinate axis corresponding to the coordinate x is parallel to the tangent of the first endpoint of the first curve segment; a coordinate axis corresponding to the coordinate y is perpendicular to a tangent line of a first endpoint of the first curve segment; the origin of coordinates is a first endpoint of the first curve segment; l ═ thetamStep, step is the distance of the projection of any two points with one-degree tangent angle difference on the directrix of the first cylindrical surface on the coordinate axis corresponding to the coordinate x; thetamIs the absolute value of the angular difference between the tangent to the second end point of the first curved segment and the tangent to the first end point of the first curved segment.
6. The testing fixture of claim 4, wherein the first surface of the carrier module further comprises: the second cylindrical surface and the third cylindrical surface are positioned on two opposite sides of the first cylindrical surface, and a straight bus of the first cylindrical surface, a straight bus of the second cylindrical surface and a straight bus of the third cylindrical surface are parallel; the second cylindrical surface is connected with the first side of the first cylindrical surface, and the change trend of the slope of the tangent at each position of the directrix of the second cylindrical surface along the extending direction is opposite to the change trend of the slope of the tangent at each position of the directrix of the first cylindrical 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 at each position of the directrix 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 at each position of the directrix of the first cylindrical surface along the extending direction of the third cylindrical surface.
7. The testing fixture of claim 1, wherein the testing fixture of flexible display panel further comprises: the pressing module is provided with a second surface, and the first surface of the bearing module is complementary to the second surface of the pressing module in shape.
8. The testing fixture of claim 1, wherein the first cylindrical surface is convex.
9. A method for testing a flexible display panel based on the flexible display panel testing jig of any one of claims 1 to 8, comprising:
attaching the flexible display panel to a first surface of the bearing module;
the light emitted from the parts, attached to the first cylindrical surface, of the flexible display panel at a plurality of positions is collected through the light collection module so as to acquire a plurality of viewing angle data, wherein the parts, attached to the first cylindrical surface, of the flexible display panel at a plurality of positions correspond to different positions on the alignment line of the first cylindrical surface.
10. The method of claim 9, wherein when the directrix of the first cylindrical surface further comprises a second curved segment, the first curved segment comprises a plurality of first locations and the second curved segment comprises a plurality of second locations;
collecting, by the light collection module, light emitted from a plurality of positions of the portion of the flexible display panel attached to the first cylindrical surface to obtain a plurality of viewing angle data includes:
Acquiring light emitted by a position, corresponding to a first position on the first curve segment, of the flexible display panel through the light acquisition module to acquire 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 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 from an average of the first optical data and the second optical data; or, determining first perspective data from the first optical data; determining second perspective data from 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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