CN109215546B - Manufacturing method of test fixture, test fixture and test method - Google Patents
Manufacturing method of test fixture, test fixture and test method Download PDFInfo
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- CN109215546B CN109215546B CN201811248800.XA CN201811248800A CN109215546B CN 109215546 B CN109215546 B CN 109215546B CN 201811248800 A CN201811248800 A CN 201811248800A CN 109215546 B CN109215546 B CN 109215546B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Abstract
The invention discloses a manufacturing method of a test fixture, the test fixture and a test method. The manufacturing method of the test fixture comprises the steps of obtaining a first size of a view separation module to be attached to a display module to be tested, wherein the first size comprises a first attaching size of a contact attaching part of the view separation module and the display module to be tested and a first thickness size of the view separation module; correspondingly determining a second attaching size of the contact attaching part of the simulation visual separation module and the display module to be tested based on the first attaching size; correspondingly determining a second thickness dimension of the simulation visual separation module based on the first thickness dimension; and manufacturing a simulation visual separation module based on the second attaching size and the second thickness size. According to the technical scheme provided by the invention, the simulation view separation module is formed, so that the module has the same function as the view separation module to be attached to the display module to be tested, the point-line defects in the display module to be tested can be accurately pre-judged, and the rejection rate of the display device is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of test fixtures, in particular to a manufacturing method of a test fixture, a test fixture and a test method.
Background
With the development of display technologies, display effects of display devices are transitioning from two-dimensional display (planar display) to stereoscopic display (three-dimensional display). The stereoscopic display technology has become a new trend in the field of display technology, and more display devices are beginning to integrate the stereoscopic display technology. The stereoscopic display technology is to make parallax between the left eye and the right eye of a person by using a series of optical methods, and to form a stereoscopic display effect by combining a left-eye picture and a right-eye picture. In order to improve user experience, the naked eye stereoscopic display technology gradually becomes a research hotspot.
At present, in the production process of a naked eye stereoscopic display device (mainly comprising a display module and a view separation module), a point line defect may exist in the incoming materials of the display panel or the display module. Generally, the detection of the point-line defects is carried out by quality testing personnel by using a point-line gauge; the size of the dot line defect subjected to quantitative inspection is multiplied by the magnification factor of the visual separation module to carry out prejudgment, namely whether the size of the dot line defect is within the range of a preset threshold value after the display module is attached to the visual separation module is judged; if yes, the incoming material is qualified. However, the pre-determination method still causes that the dot line defect is not within the preset threshold range after the naked eye stereoscopic display device with a certain proportion is attached, and the stereoscopic display device is scrapped.
Disclosure of Invention
The invention provides a manufacturing method of a test fixture, the test fixture and a test method, which are used for accurately pre-judging point-line defects in incoming materials of a display panel or a display module and reducing the rejection rate of a three-dimensional display device.
In a first aspect, the present invention provides a method for manufacturing a test fixture, the method comprising:
acquiring a first size of a view separation module to be attached to a display module to be tested, wherein the first size comprises a first attaching size of a contact attaching part of the view separation module and the display module to be tested and a first thickness size of the view separation module;
correspondingly determining a second attaching size of a contact attaching part of the simulation visual separation module and the display module to be tested based on the first attaching size;
correspondingly determining a second thickness dimension of the simulation view separation module based on the first thickness dimension;
and manufacturing the simulation visual separation module based on the second attaching size and the second thickness size.
Further, the first thickness dimension comprises a thickness value of each film layer in the view separation module;
correspondingly determining a second thickness dimension of the simulated visual separation module based on the first thickness dimension comprises:
and correspondingly determining the thickness value of each film layer in the simulated view separation module based on the thickness value of each film layer in the view separation module.
Further, after correspondingly determining a second thickness dimension of the simulated view separation module based on the first thickness dimension, the method further includes:
correspondingly determining a third fitting size of a contact fitting part of a positioning stop block and the display module to be tested and a third thickness size of the positioning stop block based on the first fitting size and the second thickness size;
manufacturing the positioning stop block according to the size of the positioning stop block;
the positioning block is used for determining the position of the simulation view separation module on the display module to be tested, the first attaching size comprises a first length size and a first width size, a third width size in the third attaching size is the same as the first width size, a third length size in the third attaching size is smaller than the first length size, and a third thickness size is smaller than the second thickness size.
In a second aspect, an embodiment of the invention provides a test fixture, which includes: a simulation view separation module;
the film layer structure of the simulation visual separation module is the same as that of the visual separation module to be attached to the display module to be tested; the dimension of the simulation view separation module on the plane parallel to the display module to be tested is smaller than the dimension of the view separation module to be attached to the display module to be tested.
Furthermore, the simulation visual separation module comprises a simulation visual separation element, a simulation support, a simulation first bonding layer and a simulation second bonding layer;
the simulated first adhesive layer is bonded between the simulated visual separation element and the simulated support;
the simulation second bonding layer is bonded on one side, far away from the simulation first bonding layer, of the simulation support, and the simulation second bonding layer is further used for bonding the display module to be tested when the test is executed.
Further, the simulated view separation element includes a plurality of simulated prisms extending in a first direction and arranged in a second direction;
the visual separation module to be attached to the display module to be tested comprises a visual separation element, a support, a first bonding layer and a second bonding layer which are sequentially stacked; the view separating element comprises a plurality of prisms extending along a third direction and arranged along a fourth direction;
the prism angle of the simulation view separation element is the same as that of the view separation element in the view separation module to be attached to the display module to be tested; the prism angle of the simulated visual separation element is an included angle between the first direction and one straight edge of the simulated visual separation element; the prism angle of a view separation element in the view separation module to be attached to the display module to be tested is an included angle between the third direction and one straight edge of the view separation element; the first direction intersects the second direction; the third direction intersects the fourth direction.
Further, the planar shape of the analog view separation element is a rectangle.
Further, the material of the simulated first bonding layer is acrylic glue or water glue.
Further, the material of the simulation support is acrylic material or glass.
Further, the material simulating the second bonding layer is silicon-based solid adhesive or UV hot melt adhesive.
Furthermore, the transmittance T of the simulation view separation module and the transmittance T of the view separation module to be attached to the display module to be tested0Satisfies the relationship of | T-T0|≤10％。
Furthermore, the refractive index n of the view separation module and the refractive index n of the view separation module to be attached to the display module to be tested0Satisfies the relation of | n-n0|≤0.3。
Furthermore, the test fixture also comprises a positioning stop block;
in the test process, one side of the positioning stop block is aligned with one side of the simulation view separation module and used for determining the arrangement direction of the simulation prisms of the simulation view separation element on the plane where the display module to be tested is located.
Furthermore, the planar shapes of the positioning stop block and the display module to be tested are rectangular, and the positioning stop block comprises a first side and a second side which are oppositely arranged, and a third side and a fourth side which are oppositely arranged; the first edge and the second edge are respectively aligned with two opposite edges of the display module to be tested in parallel.
Further, the first edge and the second edge are respectively aligned with two opposite long edges of the display module to be tested in parallel.
Further, the thickness of the positioning block in the direction perpendicular to the plane where the simulation view separation module is located is smaller than or equal to the thickness of the simulation view separation module.
Furthermore, the hardness of the positioning stop block is smaller than that of the surface of one side, in contact with the test fixture, of the display module to be tested.
In a third aspect, an embodiment of the present invention further provides a testing method, which can be performed by using any one of the testing jigs provided in the first aspect, and the testing method includes:
amplifying point-line defects in the display module to be tested by using a simulation visual separation module in the test fixture;
and judging that the amplified point line defects are within a preset threshold range, and determining that the display module to be tested is qualified.
Further, the simulation visual separation module comprises a simulation visual separation element, and the amplifying of the point line defect in the display module to be tested by using the simulation visual separation module in the test fixture comprises:
and amplifying the point-line defects in the display module to be tested by using the simulation visual separation element.
Further, before the point line defect in the display module to be tested is enlarged by using the simulation view separation module in the test fixture, the method further comprises the following steps:
acquiring a point-line defect area of the display module to be tested;
the bonding of the display module to be tested to one side of the simulation visual separation module comprises:
and bonding the display module to be tested to one side of the simulation visual separation module, so that the vertical projection of the simulation visual separation module on the display module to be tested covers the dotted line defect area.
Furthermore, the view separation module comprises a positioning stop block, and the view separation element comprises a plurality of simulation prisms; the step of adhering the display module to be tested to one side of the simulation visual separation module further comprises the following steps of:
aligning one side of the positioning stop block with one side of the simulation view separation module to determine the arrangement direction of the plurality of simulation prisms of the simulation view separation element on the plane where the display module to be tested is located.
Further, the judging that the amplified dot line defect is within a preset threshold range, and the qualification of the display module to be tested includes:
measuring the amplified point-line defects by using a point-line gauge;
judging whether the amplified point line defect is within a preset threshold range;
if yes, the display module to be tested is qualified.
The manufacturing method of the test fixture comprises the steps of obtaining a first size of a visual separation module to be attached to a display module to be tested, wherein the first size comprises a first attaching size of a contact attaching part of the visual separation module and the display module to be tested and a first thickness size of the visual separation module; correspondingly determining a second attaching size of the contact attaching part of the simulation visual separation module and the display module to be tested based on the first attaching size; correspondingly determining a second thickness dimension of the simulation visual separation module based on the first thickness dimension; manufacturing an analog visual separation module based on the second attaching size and the second thickness size, wherein the film layer structure of the analog visual separation module is the same as that of the visual separation module to be attached to the display module to be tested; in the plane where the simulated view separation module is located, the length of a line segment, which is cut by the edge of the simulated view separation module, of any straight line passing through the center of the simulated view separation module is smaller than a first preset length value; the size of the simulation view separation module on the plane parallel to the display module to be tested is smaller than that of the view separation module to be attached to the display module to be tested, so that the simulation view separation module can be used for realizing the same amplification effect on the point line defects as the view separation module to be attached to the display module to be tested.
Drawings
Fig. 1 is a schematic flow chart illustrating a manufacturing method of a test fixture according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for manufacturing another test fixture according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a test fixture according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a simulation view separation module according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a comparison between a simulation view separating element and a view separating element in a view separating module to be attached to a display module to be tested according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a comparison between a test fixture and a point-line defect in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating a comparison between a point-line defect and a line defect of another testing tool according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another testing fixture according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another testing fixture according to an embodiment of the present invention;
FIG. 10 is a flow chart of a testing method according to an embodiment of the present invention;
fig. 11 is a schematic flow chart of another testing method according to an 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.
Fig. 1 is a schematic flow chart illustrating a manufacturing method of a test fixture according to an embodiment of the present invention. Referring to fig. 1, the manufacturing method of the test fixture includes:
s001, obtaining a first size of a visual separation module to be attached to the display module to be tested.
The first size comprises a first attaching size of the visual separation module and a contact attaching part of the display module to be tested and a first thickness size of the visual separation module.
For example, the first attaching dimension may be a dimension in a plane parallel to a plane where an attaching surface of the display module to be tested is located, and the first thickness dimension may be a dimension in a direction perpendicular to the attaching surface of the display module to be tested.
For example, the first dimension may be obtained by a mechanical measurement method, an optical measurement method, or other methods known to those skilled in the art, and the embodiment of the present invention is not limited thereto.
And S002, correspondingly determining a second attaching size of the contact attaching part of the simulation visual separation module and the display module to be tested based on the first attaching size.
And the second attaching size is smaller than the first attaching size. It can be further understood that, in a plane parallel to the plane where the analog view separation module is located, the length of a line segment cut by the edge of the analog view separation module from any straight line passing through the center of the analog view separation module is smaller than a first preset length value, so that the second attaching size of the analog view separation module is smaller than the first attaching size of the view separation module to be attached to the display module to be tested.
For example, the size of the dot line defect in the display module to be tested is usually small, the first preset length value can be set to be a small value, and on the premise that the simulation view separation module can completely cover the dot line defect area on the display module to be tested, the range covered by the simulation view separation module does not excessively exceed the dot line defect area. Therefore, on the premise of ensuring that the simulation visual separation module can accurately pre-judge the size of the point line defect, the second attaching size of the simulation visual separation module can be reduced, and further the overall size of the test fixture is reduced, so that the test fixture is convenient to take and store.
And S003, correspondingly determining a second thickness dimension of the simulation view separation module based on the first thickness dimension.
The first thickness dimension comprises the thickness value of each film layer in the view separation module. The steps can be specifically as follows: and correspondingly determining the thickness value of each film layer in the simulated view separation module based on the thickness value of each film layer in the view separation module.
Therefore, the film structure of the simulation view separation module is the same as that of the view separation module to be attached in the display device to be tested, and the thicknesses of the corresponding films are the same or similar (here, "similar" means that the thickness difference is smaller than a preset thickness difference value, so that the simulation view separation module is favorable for realizing the same method function as the view separation module to be attached in the display device to be tested, and the position of the amplified dotted line defect is similar to that of the dotted line defect after actual attachment).
And S004, manufacturing a simulation visual separation module based on the second attaching size and the second thickness size.
This step may include: according to the second thickness dimension, firstly, films which are the same as or similar to the materials of all films of the visual separation module to be attached to the display module to be tested (generally, the difference values of the optical transmittance and the refractive index are respectively in a preset threshold range, and the detailed explanation of the test fixture part is given below) are attached to the films in the same sequence as the position relation of all films of the visual separation module to be attached to the display module to be tested; and then, cutting to form a simulation visual separation module with the size meeting the second fit size. The method can ensure the edges of all the film layers to be strictly aligned, and is favorable for aligning the simulation visual separation module with the display module to be tested when the test fixture is subsequently used for executing the test method. Of course, the method also comprises the steps of cutting each film layer into film layers with the size meeting the second attaching size; and then, aligning and attaching to form a simulation visual separation module. The method can save raw materials of each film layer and reduce the manufacturing cost of the test fixture. Of course, other ways known to those skilled in the art can be included, and the embodiment of the present invention is not limited thereto.
Fig. 1 only shows that S002 is performed first and then S003 is performed, but the method for manufacturing the test fixture according to the embodiment of the present invention is not limited. In other embodiments, S003 may be performed first, and then S002 may be performed, which is not limited in this embodiment of the present invention.
Optionally, the first preset length value is 5 cm.
By such arrangement, the size requirement for pre-judging the point line defect by using the simulation visual separation module can be met. Of course, those skilled in the art can understand that the first preset length value can also be set to other values according to the size of the display module to be tested and the actual requirements of the manufacturing method of the test fixture, for example: 3cm or 10cm, which is not limited in the embodiments of the present invention.
Optionally, fig. 2 is a schematic flow chart illustrating a manufacturing method of another test fixture according to an embodiment of the present invention. Referring to fig. 2, the manufacturing method of the test fixture may include:
s01, acquiring a first size of the visual separation module to be attached to the display module to be tested.
And S02, correspondingly determining a second attaching size of the contact attaching part of the simulation view separation module and the display module to be tested based on the first attaching size.
And S03, correspondingly determining a second thickness dimension of the simulation view separation module based on the first thickness dimension.
And S04, correspondingly determining the size of the positioning stop block based on the first attaching size and the second thickness size.
The positioning stop block is used for determining the position of the simulation visual separation module on the display module to be tested, and the size of the positioning stop block comprises a third fitting size of a contact fitting part of the positioning stop block and the display module to be tested and a third thickness size of the positioning stop block. Preferably, the first fitting dimension is a rectangular dimension, wherein the first fitting dimension includes a first length dimension and a first width dimension, a third width dimension of the third fitting dimensions is the same as the first width dimension, a third length dimension of the third fitting dimensions is smaller than the first length dimension, and a third thickness dimension is smaller than the second thickness dimension (detailed below).
And S05, manufacturing the positioning stop block according to the size of the positioning stop block.
In this step, the positioning stopper may be formed by cutting or other methods known to those skilled in the art, and the embodiment of the present invention is not limited thereto.
And S06, manufacturing a simulation visual separation module based on the second attaching size and the second thickness size.
It should be noted that fig. 2 only exemplarily shows that S06 is executed after S04 and S05, but does not limit the manufacturing method of the test fixture provided by the embodiment of the present invention. In other embodiments, S06 may also be performed after S03 and before S04, which is not limited in this embodiment of the present invention. Of course, the positioning stop block can be formed first, and then the simulation view separation module can be formed; or both may be formed simultaneously, as such, are not limited by the embodiments of the present invention.
On the basis of the foregoing embodiments, an embodiment of the invention provides a test fixture, and for example, fig. 3 is a schematic structural diagram of the test fixture provided in the embodiment of the invention. Referring to fig. 3, the test fixture 3DM includes: a simulation view separation module 10; the simulation visual separation module 10 and the visual separation module to be attached to the display module to be tested have the same film layer structure; the dimension of the simulation view separating module 10 on the plane parallel to the display module to be tested is smaller than the dimension of the view separating module to be attached on the display module to be tested.
The visual separation module to be attached to the display module to be tested has an amplification effect on the point-line defects in the display module to be tested, and the amplification factor is usually 1.1-1.5 times.
The test fixture provided by the embodiment comprises a simulation visual separation module 10, and the simulation visual separation module 10 and a visual separation module to be attached to a display module to be tested are arranged to have the same film layer structure, so that the magnification of the simulation visual separation module 10 for the point line defects in the display module to be tested is equal to the magnification of the visual separation module to be attached to the display module to be tested for the point line defects in the display module to be tested, and for example, when the magnification of the visual separation module to be attached to the display module to be tested is 1.3 times, the magnification of the simulation visual separation module 10 used in the process of testing the point line defects of the display module to be tested is 1.3 times. Thus, the simulated view separation module 10 can achieve the same amplification effect as the view separation module to be attached to the display module to be tested. Therefore, the accuracy of pre-judging the point-line defects in the display module to be tested can be improved; therefore, the unqualified display module to be tested is prevented from being attached to the visual separation module to be attached, and the rejection rate of the stereoscopic display device formed after attachment is reduced.
In addition, by setting the dimension of the analog view separation module 10 on the plane parallel to the display module to be tested to be smaller than the dimension of the view separation module to be attached to the display module to be tested, the size of the analog view separation module can be made smaller while the point-line defect in the display module to be tested is accurately predicted, so that the analog view separation module 10 (or the test fixture 3DM) is convenient to store and take.
For example, when the shape of the simulated view separation module 10 parallel to the plane of the display module to be tested is rectangular, the length thereof is smaller than the length of the view separation module to be attached to the display module to be tested, and/or the width thereof is smaller than the width of the view separation module to be attached to the display module to be tested.
For example, for a 50-inch display module to be tested, when the simulated view separation module 10 is rectangular, its short side may be 1cm, 2cm or another length smaller than the length of the long side (or the short side) of the display module to be tested, which is not limited in the embodiment of the present invention.
Optionally, the thickness of each film layer in the film layer structure of the simulation view separation module is correspondingly equal to the thickness of each film layer in the film layer structure of the view separation module to be attached to the display module to be tested.
With the arrangement, on one hand, the thickness of the simulation visual separation module does not need to be redesigned, and only the size of the simulation visual separation module on the plane parallel to the display module to be tested needs to be set, so that the design difficulty of the simulation visual separation module can be reduced; on the other hand, the shape, size and position of the amplified point-line defect are closer to the shape, size and position of the point-line defect attached to the view separation module on the display module to be tested, so that the prejudgment accuracy of the point-line defect is improved.
Optionally, fig. 4 is a schematic structural diagram of a simulation view separation module according to an embodiment of the present invention. Referring to fig. 4, the simulated visual separation module 10 includes a simulated visual separation element 101, a simulated support 102, a simulated first adhesive layer 103, and a simulated second adhesive layer 104; the simulated first adhesive layer 103 is adhered between the simulated visual separation element 101 and the simulated support 102; the simulated second adhesive layer 104 is adhered to the side of the simulated support 102 away from the simulated first adhesive layer 103, and the simulated second adhesive layer 104 is also used for adhering the display module 20 to be tested when the test is performed.
The surface of the separation element 101 has microstructures, such as parallax gratings, prism arrays, etc., and the amplification of the separation module 10 to the dot line defect in the display module 20 to be tested is usually realized by the separation element 101. The simulated view separation element 101 may also be referred to as a simulated three-dimensional (3D) optical film, a simulated stereoscopic display optical film, a simulated view separation model, or a simulated three-dimensional LENS (3D LENS).
The simulation support 102 is used to simulate the effect of a support (spacer) in the view separating module 20 to be attached to the display module to be tested, so as to increase the depth of field and improve the 3D display effect of the display device formed by attachment.
Illustratively, the light transmittance of the simulation support 102 is greater than or equal to 90%, so as to ensure that the image of the display module 20 to be tested can maintain high brightness after passing through the simulation view separation module 10, thereby ensuring that the size of the dot line defect amplified by the simulation view separation element 101 can be accurately measured.
Meanwhile, the light transmittance of a support in the visual separation module to be attached to the display module to be tested is more than or equal to 90%, so that the high brightness of the image of the display module can be kept after the visual separation module in the three-dimensional display device formed after the three-dimensional display device is attached, and the image display effect of the three-dimensional display device is good.
The film structure of the simulation view separation module 10 is the same as the film structure of the view separation module to be attached to the display module to be tested 20, and the thicknesses of the films are the same, so that the view separation module 10 can achieve the same amplification effect as the view separation module to be attached to the display module to be tested 20, and the accurate pre-judgment of the point-line defect in the display module to be tested is ensured.
For example, the display module 20 to be tested may include a display panel 201 and a driving circuit 202, where the display panel 201 may be a liquid crystal display panel or a light emitting diode display panel, or other types of display panels known to those skilled in the art; the driving circuit 202 may be a flexible circuit board or a driving chip, or other types of driving circuits known to those skilled in the art, which is not limited by the embodiments of the invention.
Optionally, fig. 5 is a schematic diagram illustrating a comparison between a simulation view separating element and a view separating element in a view separating module to be attached to a display module to be tested according to an embodiment of the present invention. Referring to fig. 5, the simulated visual field separating element 101 includes a plurality of simulated prisms extending in a first direction X1 and arranged in a second direction Y1; the view separation module (not shown in fig. 5, which can be understood by referring to the film structure of the analog view separation module 10 shown in fig. 4) to be attached to the display module to be tested includes a view separation element 401, a support, a first adhesive layer and a second adhesive layer, which are sequentially stacked; the view separating element 401 includes a plurality of prisms extending in the third direction X0 and arranged in the fourth direction Y0; the prism angle A1 of the simulation view separating element 101 is the same as the prism angle A0 of the view separating element 401 in the view separating module to be attached to the display module to be tested; the prism angle a1 of the simulated view separation element 101 is the angle between the first direction X1 and one straight edge 1011 of the simulated view separation element 101; the prism angle a0 of the view separating element 401 in the view separating module to be attached to the display module to be tested 20 is an included angle between the third direction X0 and one straight edge 4011 of the view separating element 401; the first direction X1 intersects the second direction Y1; the third direction X0 intersects the fourth direction Y0.
The prism angle determines the amplification effect of the simulated view separation element 101 and the view separation element 401 in the view separation module to be attached to the display module to be tested on the dotted line defect in the display module to be tested. When the angle of the prism of the simulated view separating element 101 is the same as that of the view separating element 401 in the view separating module to be attached to the display module to be tested, the amplification effect of the simulated view separating element and the view separating element on the point line defect is the same.
By the arrangement, the amplification effect of the visual separation module to be attached to the display module to be tested on the point-line defects can be favorably realized by utilizing the simulated visual separation module 10, so that the point-line defects can be accurately pre-judged.
Fig. 6 is a schematic diagram illustrating a comparison between test point-line defects of a test fixture according to an embodiment of the present invention. Referring to fig. 6, after the analog view separation module 10 (mainly, the analog view separation element 101 plays a role of amplification) is attached to one side of the display module to be tested 20, the point defect D01 in the display module to be tested 20 is amplified by the analog view separation module 10 to form an amplified point defect D11. Because the simulated view separation module 10 and the view separation module to be attached to the display module to be tested 20 have the same magnification factor for the point-line defect, the size of the point defect D11 formed by the simulated view separation module 10 after being amplified is the same as the size of the point defect observed after the display module to be tested 20 and the view separation module to be attached are actually attached, and the judgment of the point defect D11 after being amplified can simulate the judgment of the point defect in the stereoscopic display device formed after being actually attached, so that the accurate prejudgment of the point defect D01 is realized.
For example, fig. 7 is a schematic diagram illustrating a comparison between a point-line defect and a line defect of another testing jig according to an embodiment of the present invention. Referring to fig. 7, after the analog view separation module 10 (mainly, the analog view separation element 101 plays a role of amplification) is attached to one side of the display module to be tested 20, the point defect D01 in the display module to be tested 20 is amplified by the analog view separation module 10 to form a line defect D12. Because the simulated view separation module 10 and the view separation module to be attached to the display module to be tested 20 have the same amplification effect on the point-line defects, the size of the amplified line defect D12 formed by the simulated view separation module 10 is the same as the size of the line defect observed after the display module to be tested 20 and the view separation module to be attached are actually attached, and the judgment on the amplified line defect D12 can simulate the judgment on the line defect in the stereoscopic display device formed after the actual attachment, so that the accurate pre-judgment on the point defect D01 is realized.
It should be noted that fig. 5 only exemplarily shows that the prism angle is an included angle between the prism and one straight edge 4011 of the view separating element 401, and is an included angle between the analog prism and one straight edge 1011 of the analog view separating element 101, but the present invention is not limited to the test fixture 3DM provided in the embodiment of the present invention. In other embodiments, the straight edge may be selected according to the actual requirement of the test fixture 3DM (which may be understood as the actual shape and requirement of the view separating element and the simulated view separating element), which is not limited by the embodiment of the present invention. In addition, fig. 6 and fig. 7 only show two cases that the point defect D01 in the display module to be tested 20 can be observed after passing through the simulation view separating module 10, but the present invention is not limited to the test result of the test fixture 3DM provided in the embodiment of the present invention. It can be understood by those skilled in the art that the test fixture 3DM is utilized to pre-determine the dot line defect in the display module 10 to be tested, and other test results are included.
Alternatively, with continued reference to fig. 6 or fig. 7, the planar shape of the analog view separation element 101 is a rectangle.
By such arrangement, the planar shape of the analog visual separation element 101 is simple, and the design and the manufacture are convenient, so that the manufacture difficulty and the cost of the test fixture 3DM are reduced.
It should be noted that the planar shape of the simulated visual separation element 101 may also be other polygons, or a semicircle, or other figures known to those skilled in the art, and it is sufficient to ensure that one side is a straight side, and the shape of the figures may be irregular.
Optionally, with continued reference to fig. 4, the material of the simulated first adhesive layer 103 is acrylic glue or water glue.
The simulated first adhesive layer 103 is an internal film structure of the test fixture 3 DM. The acrylic glue and the water glue are materials with higher gram number of viscosity, namely materials with stronger viscosity. The arrangement is that the simulation view separation element 101 and the simulation support 103 are bonded by the material with strong viscosity, so that the bonding between the two is firm, and the whole structure of the simulation view separation module 10 is stable.
It should be noted that the material for simulating the first adhesive layer 103 should be consistent with the material for the first adhesive layer in the view separation module to be attached to the display module 20 to be tested, and the material for simulating the first adhesive layer 103 may also be other adhesive layer materials with stronger viscosity, which can be known by those skilled in the art, which is not limited in the embodiment of the present invention.
Optionally, with continued reference to fig. 4, the material of the dummy support 102 is an acrylic material or glass.
With such an arrangement, the light transmittance of the dummy support 102 can satisfy the requirement of "light transmittance is not less than 90%".
It should be noted that the material of the simulation supporter 102 should be consistent with the material of the supporter in the view separating module to be attached to the display module 20 to be tested, and the material of the simulation supporter 102 may also be other transparent supporter materials known to those skilled in the art, which is not limited in the embodiment of the present invention.
Optionally, with continued reference to fig. 4, the material of the simulated second adhesive layer 104 is a silicon-based solid adhesive or a UV-type hot melt adhesive.
The simulated second adhesive layer 104 is used for adhering the display module 20 to be tested, and after the prejudgment is finished, the simulated second adhesive layer 104 needs to be separated from the tested display module 20 to be tested. The silicon-based solid adhesive or the UV type hot melt adhesive is a material with lower gram viscosity, namely a material with weaker viscosity, so that the tested display module 20 to be tested can be conveniently separated from the test fixture 10; meanwhile, after the simulated second adhesive layer 104 is separated from the display module to be tested 20, no residual glue is left on the surface of the adhesive side of the display module to be tested 20. Therefore, the test fixture 3DM is easy to adhere and separate, and the damage to the display module 20 to be tested can be avoided.
It should be noted that the material simulating the second adhesive layer 104 should be consistent with the material of the second adhesive layer in the view separation module to be attached to the display module 20 to be tested, and the material simulating the second adhesive layer 104 may also be other adhesive layer materials with weak adhesion, which can be known by those skilled in the art, and the embodiment of the present invention is not limited thereto.
Optionally, the transmittance T of the simulation view separation module 10 and the transmittance T of the view separation module to be attached to the display module to be tested 200Satisfies the relationship of | T-T0|≤10％。
The transmittance only affects the image display brightness of the three-dimensional display device formed by lamination, and is not related to the size of the dot line defect which can be observed in the three-dimensional display device. With such an arrangement, different materials can be adopted for each film layer of the simulation view separation module 10 and the view separation module to be attached to the display module to be tested 10 (on the premise that the film layer laminated structures of the simulation view separation module and the display module are consistent), and the design flexibility of the test fixture 3DM is improved.
Optionally, the refractive index n of the view separation module 10 and the refractive index n of the view separation module to be attached to the display module to be tested 200Satisfies the relation of | n-n0|≤0.3。
The refractive index only affects the position of the picture display of the stereoscopic display device formed after lamination, namely the position of the observable point-line defect, but does not affect the size of the point-line defect. With such an arrangement, different materials can be adopted for each film layer of the simulation view separation module 10 and the view separation module to be attached to the display module to be tested 10 (on the premise that the film layer laminated structures of the simulation view separation module and the display module are consistent), and the design flexibility of the test fixture 3DM is improved.
Optionally, fig. 8 is a schematic structural diagram of another test fixture provided in the embodiment of the present invention, and fig. 9 is a schematic structural diagram of another test fixture provided in the embodiment of the present invention. Referring to fig. 8 or 9, the test fixture 3DM further includes a positioning stopper 30; during the test, one side 301 of the positioning block 30 is aligned with one side of the analog view separation module 10 for determining the arrangement direction of the plurality of analog prisms of the analog view separation element 101 on the plane of the display module 20 to be tested.
With such an arrangement, the extending direction of the plurality of simulation prisms of the simulation view separating element 101 on the plane where the display module to be tested 20 is located can be the same as the extending direction of the prisms of the view separating element to be attached to the display module to be tested 20 on the plane where the display module to be tested 20 is located, that is, the relative angle between the extending direction of the simulation prisms of the simulation view separating element 101 and the dotted line defect is equal to the relative angle between the extending direction of the prisms of the view separating element and the dotted line defect, so that the amplifying effect of the simulation view separating module 10 and the view separating module to be attached to the display module to be tested 20 on the dotted line defect of the display module to be tested 20 is the same, and the simulation view separating module 10 can be used to accurately pre-judge the dotted line defect of the display module to be tested 20.
Meanwhile, the positioning mode is simple and easy to implement.
It should be noted that the test fixture may also use other positioning methods (for example, an optical positioning method) to position the analog view separation module 10, which is not limited in the embodiment of the present invention.
Optionally, with continued reference to fig. 8, the planar shapes of the positioning block 30 and the display module to be tested 20 are rectangular, and the positioning block 30 includes a first side 301 and a second side 302 which are oppositely arranged, and a third side 303 and a fourth side 304 which are oppositely arranged; the first side 301 and the second side 302 are aligned in parallel with two opposite sides of the display module to be tested 20.
By the arrangement, the shape of the positioning stop block 30 is simpler, and the design and manufacturing difficulty of the positioning stop block is reduced; meanwhile, the first side 301 and the second side 302 of the positioning block 30 can be used to determine the relative position of the positioning block 30 and the display module to be tested 20.
Optionally, with continued reference to fig. 8, the first side 301 and the second side 302 are aligned in parallel with two opposite long sides of the display module to be tested 20.
With such an arrangement, the length of the long side of the positioning block 30 can be equal to the length of the short side of the display module to be tested 20, that is, the third width dimension of the third fitting dimension of the positioning block is the same as the first width dimension. Thereby can reduce the size of location dog 30, based on this, also can design the less simulation view separation module 10 of size to be favorable to reducing test fixture 3 DM's size, make test fixture 3DM be convenient for take and deposit.
Optionally, with continued reference to fig. 9, the thickness of the positioning block 30 in the direction perpendicular to the plane of the analog view separation module 10 is less than or equal to the thickness of the analog view separation module 10.
With such an arrangement, on one hand, the positioning stopper 30 has a smaller thickness, that is, the third thickness dimension of the positioning stopper is smaller than the second thickness dimension, so that the overall volume of the positioning stopper 30 is favorably reduced; on the other hand, the three-dimensional space occupied by the positioning block 30 is small, the measuring sight line is not blocked, the measuring action is not hindered, and therefore the execution of the pre-judging process of the point line defects is not influenced.
Optionally, the hardness of the positioning block 30 is less than the hardness of the surface of the side of the to-be-tested display module 20, which is in contact with the testing fixture 3 DM.
By such arrangement, the positioning stop block 30 can be prevented from scratching the surface of the display module 20 to be tested, and the display module 20 to be tested is still intact after the prejudgment process is finished.
For example, the side of the display module 20 to be tested contacting the test fixture 3DM usually includes a polarizer, and in this case, the hardness of the positioning block 30 needs to be less than that of the polarizer.
On the basis of the foregoing embodiments, an embodiment of the present invention further provides a testing method, which can be executed by using any one of the testing jigs provided in the foregoing embodiments, and fig. 10 is a schematic flow chart of the testing method provided in the embodiment of the present invention. Referring to fig. 10, the test method includes:
s51, amplifying the point line defects in the display module to be tested by using the simulation view separating module in the test fixture.
The film structure of the simulation view separation module is the same as that of the view separation module to be attached to the display module to be tested, and the amplification effects of the film structure and the film structure on the point line defects in the display module to be tested are the same. Exemplarily, fig. 6 and 7 respectively show a comparison between a point defect D01 in the display module to be tested and a point defect D11 formed after enlarging (exemplarily, a point defect D11 formed after enlarging is shown in fig. 6, and a line defect D12 formed after enlarging is shown in fig. 7) formed by simulating the enlarging action of the view separating module; the details can be understood with reference to the above explanation, which is not repeated herein.
And S52, judging that the amplified point line defects are within a preset threshold range, and determining that the display module to be tested is qualified.
The preset threshold range may be a size range of the dot line defect corresponding to the qualified display device. And S51 is executed, the simulation view separation module is utilized to play the amplification effect of the view separation module to be attached on the display device to be tested on the point line defect, and the size of the amplified point line defect is obtained. And S52, comparing the size of the amplified point-line defect with the size range of the point-line defect corresponding to the qualified display device, and if the size of the point-line defect is within the range, determining that the display module to be tested is qualified.
According to the test method provided by the embodiment of the invention, the point line defect in the display module to be tested is amplified through the simulation view separation module in the test fixture, and the amplification effect of the view separation module to be attached to the display module to be tested can be simulated, so that the point line defect in the display module to be tested can be accurately pre-judged.
Optionally, referring to fig. 3, the test fixture 3DM includes a positioning stop 30; referring to fig. 4, the analog view separation module 10 includes an analog view separation element 101; referring to fig. 5, the analog view separating element 101 includes a plurality of analog prisms. Based on this, fig. 11 is a schematic flow chart of another testing method provided in the embodiment of the present invention. Referring to fig. 11, the test method may include:
and S61, acquiring a point line defect area of the display module to be tested.
The point-line defect area is an area where the point-line defect exists in the display module to be tested. The test result can be obtained by direct observation of an observer or by testing with a testing device known to those skilled in the art, and the embodiment of the present invention is not limited thereto.
And S62, aligning the first edge and the second edge of the positioning block with the two opposite edges of the display module to be tested respectively in parallel.
The step of determining the prism angle is prepared for subsequent determination of the prism angle, so that the prism angle of the simulation view separation module is convenient to ensure to be the same as the prism angle of the view separation module to be attached to the display module to be tested.
And S63, aligning one side of the simulation view separating module with the third side of the positioning stop block to determine the arrangement direction of the plurality of simulation prisms of the simulation view separating element on the plane of the display module to be tested.
Wherein, the positioning block and the simulation view separating module respectively comprise a straight edge. The straight edge of the simulation visual separation module is aligned with the straight edge of the positioning stop block to determine the position of the simulation visual separation module, so that the arrangement direction of a plurality of simulation prisms of the simulation visual separation element on the plane where the display module to be tested is located is determined, the arrangement direction of the simulation prisms of the simulation visual separation element on the plane where the display module to be tested is located is the same as the arrangement direction of a plurality of prisms of the visual separation element in the visual separation module to be attached on the display module to be tested on the plane where the display module to be tested is located, the amplification effect of the simulation visual separation module on the dotted line defects is the same as the amplification effect of the visual separation module to be attached on the display module to be tested, and accurate prejudgment of the dotted line defects is facilitated.
Referring to fig. 8, a straight edge of the simulated view separation module 10 is aligned with the third edge 303 of the positioning block 30. Combining with S62 and S63, the first side 301 and the second side 302 of the positioning block 30 are aligned with the two long sides of the display module 20 to be tested, so that the extending direction of the third side 303 of the positioning block is parallel to the extending direction of the short side of the display module 20 to be tested, so that the extending direction of the straight side of the simulated view separating module 10 is parallel to the extending direction of the short side of the display module 20 to be tested, and the extending direction of the simulated prism in the simulated view separating element 101 is the same as the extending direction of the prism in the view separating element in the view separating module to be attached, and the amplification effects of the two on the dot line defects are the same.
It should be noted that, in the actual attaching process (the display module to be tested that is qualified through the test is attached to the view separating module to be attached), an attaching error is allowed to exist, and the testing method provided by this embodiment can simulate various attaching conditions (mainly referred to as an attaching angle) within an attaching error range.
For example, for a display device with a certain size, the extending direction of the prism forms an angle of 10 degrees with a straight edge of the display module. In the actual attaching process, the included angle is allowed within the range of 9-11 degrees, so that the amplification effects of the view separation modules are different, and the amplification effect of any angle within the range of 9-11 degrees can be simulated by changing the relative position of the simulation view separation module 10 and the display module to be tested 20, so that the point line defects amplified at each angle within the range of 9-11 degrees can be judged, namely, accurate prejudgment is realized.
And S64, bonding the display module to be tested to one side of the simulation view separation module.
The step can include adhering the display module to be tested to one side of the simulation view separation module by using a second adhesive layer, and enabling the vertical projection of the simulation view separation module on the display module to be tested to cover the dotted line defect area.
So set up, can reduce test fixture's size as far as possible under the prerequisite of accurate prejudgement point line defect, be convenient for test fixture deposit and take.
S65, amplifying the point line defects in the display module to be tested by using the simulation view separating element.
The amplification of the analog view separation element can be understood with reference to the above description, which is not repeated herein.
And S66, measuring the amplified point line defects by using a point line gauge.
Wherein, the dot-line gauge is a tool for measuring the size of the dot-line defect. The specific specification and the using method thereof can be any specification and method known to those skilled in the art, and the embodiment of the present invention is not described in detail nor limited.
And S67, judging whether the amplified point-line defects are within a preset threshold range.
If yes, go to S68.
And S68, the display module to be tested is qualified.
According to the test method provided by the embodiment of the invention, the point line defect in the display module to be tested is amplified through the simulation view separation module in the test fixture, the amplification effect of the view separation module to be attached to the display module to be tested can be simulated, the amplified point line defect is tested by using the point line gauge, and the point line defect in the attached display device is measured by directly using the point line gauge, so that the point line defect in the display module to be tested can be accurately pre-judged.
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 (21)
1. A manufacturing method of a test fixture is characterized by comprising the following steps:
acquiring a first size of a view separation module to be attached to a display module to be tested, wherein the first size comprises a first attaching size of a contact attaching part of the view separation module and the display module to be tested and a first thickness size of the view separation module;
correspondingly determining a second attaching size of a contact attaching part of the simulation visual separation module and the display module to be tested based on the first attaching size;
correspondingly determining a second thickness dimension of the simulation view separation module based on the first thickness dimension;
manufacturing the simulation visual separation module based on the second attaching size and the second thickness size;
the first thickness dimension comprises a thickness value of each film layer in the view separation module;
correspondingly determining a second thickness dimension of the simulated visual separation module based on the first thickness dimension comprises:
correspondingly determining the thickness value of each film layer in the simulated view separation module based on the thickness value of each film layer in the view separation module;
after correspondingly determining a second thickness dimension of the simulated view separation module based on the first thickness dimension, the method further includes:
correspondingly determining the size of a positioning stop block based on the first attaching size and the second thickness size, wherein the size of the positioning stop block comprises a third attaching size of a part which is in contact with the display module to be tested and a third thickness size of the positioning stop block;
manufacturing the positioning stop block according to the size of the positioning stop block;
the positioning block is used for determining the position of the simulation view separation module on the display module to be tested, the first attaching size comprises a first length size and a first width size, a third width size in the third attaching size is the same as the first width size, a third length size in the third attaching size is smaller than the first length size, and a third thickness size is smaller than the second thickness size.
2. A test fixture formed by the method of claim 1, comprising:
a simulation view separation module;
the film layer structure of the simulation visual separation module is the same as that of the visual separation module to be attached to the display module to be tested; the dimension of the simulation view separation module on the plane parallel to the display module to be tested is smaller than the dimension of the view separation module to be attached to the display module to be tested.
3. The testing fixture of claim 2, wherein the thickness of each film layer in the film layer structure of the simulation view separation module is equal to the thickness of each film layer in the film layer structure of the view separation module to be attached to the display module to be tested.
4. The test fixture of claim 2, wherein the simulated view separation module comprises a simulated view separation element, a simulated support, a simulated first adhesive layer, and a simulated second adhesive layer;
the simulated first adhesive layer is bonded between the simulated visual separation element and the simulated support;
the simulation second bonding layer is bonded on one side, far away from the simulation first bonding layer, of the simulation support, and the simulation second bonding layer is bonded with the display module to be tested when the test is executed.
5. The test fixture of claim 4, wherein the simulated view separation element comprises a plurality of simulated prisms;
the visual separation module to be attached to the display module to be tested comprises a visual separation element, a support, a first bonding layer and a second bonding layer which are sequentially stacked; the view separating element comprises a plurality of prisms;
the prism angle of the simulation view separation element is the same as the prism angle of the view separation element in the view separation module to be attached to the display module to be tested.
6. The test fixture of claim 5, wherein the simulated view separation element has a rectangular planar shape.
7. The test fixture of claim 4, wherein the material simulating the first adhesive layer is acrylic glue or water glue.
8. The testing fixture of claim 4, wherein the material of the simulation support is acrylic material or glass.
9. The test fixture of claim 4, wherein the material simulating the second adhesive layer is a silicon-based solid adhesive or a UV hot melt adhesive.
10. The testing fixture of claim 2, wherein the transmittance T of the simulated view separation module and the transmittance T of the view separation module to be attached to the display module to be tested are different0Satisfies the relationship of | T-T0|≤10％。
11. The testing fixture of claim 2, wherein the refractive index n of the view separation module and the refractive index n of the view separation module to be attached to the display module to be tested0Satisfies the relation of | n-n0|≤0.3。
12. The test fixture of claim 5, further comprising a positioning stop;
in the test process, one side of the positioning stop block is aligned with one side of the simulation view separation module and used for determining the arrangement direction of the simulation prisms of the simulation view separation element on the plane where the display module to be tested is located.
13. The testing fixture of claim 12, wherein the planar shapes of the positioning block and the display module to be tested are rectangular, and the positioning block comprises a first side and a second side which are opposite to each other; the first edge and the second edge are respectively aligned with two opposite edges of the display module to be tested in parallel.
14. The testing fixture of claim 13, wherein the first side and the second side are aligned in parallel with two opposite long sides of the display module to be tested, respectively.
15. The test fixture of claim 12, wherein the thickness of the positioning block in a direction perpendicular to the plane of the separation module is smaller than or equal to the thickness of the separation module.
16. The testing fixture of claim 12, wherein the positioning block has a hardness less than a hardness of a surface of a side of the display module to be tested contacting the testing fixture.
17. A testing method, which is performed by using the testing jig of any one of claims 2-16, comprising:
amplifying point-line defects in the display module to be tested by using a simulation visual separation module in the test fixture;
and if the amplified point line defect is judged to be in the preset threshold range, the display module to be tested is qualified.
18. The testing method of claim 17, wherein the separation module comprises a separation element, and the amplifying the dot line defect in the display module to be tested by the separation module comprises:
and amplifying the point-line defects in the display module to be tested by using the simulation visual separation element.
19. The method as claimed in claim 18, wherein before the step of amplifying the dot line defect in the display module to be tested by using the simulation view separation module in the test fixture, the method further comprises:
acquiring a point-line defect area of the display module to be tested;
bonding the display module to be tested to one side of the simulation visual separation module;
the bonding of the display module to be tested to one side of the simulation visual separation module comprises:
and bonding the simulation visual separation module to one side of the display module to be tested, so that the vertical projection of the simulation visual separation module on the display module to be tested covers the dotted line defect area.
20. The testing method of claim 19, wherein the testing fixture further comprises a positioning block, the positioning block comprising a first side and a second side disposed opposite to each other, and a third side connecting the first side and the second side, the view separating element comprising a plurality of simulated prisms; the step of adhering the display module to be tested to one side of the simulation visual separation module further comprises the following steps of:
respectively aligning the first edge and the second edge of the positioning stop block with two opposite edges of the display module to be tested in parallel;
aligning one side of the simulation view separation module with the third side of the positioning stop block to determine the arrangement direction of the plurality of simulation prisms of the simulation view separation element on the plane where the display module to be tested is located.
21. The testing method of claim 18, wherein if the point-line defect after the judgment and the amplification is within a preset threshold range, the display module to be tested is qualified comprises:
measuring the amplified point-line defects by using a point-line gauge;
judging whether the amplified point line defect is within a preset threshold range;
if yes, the display module to be tested is qualified.
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