CN217033570U - Color diffraction testing device and color diffraction testing system - Google Patents

Color diffraction testing device and color diffraction testing system Download PDF

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CN217033570U
CN217033570U CN202122458057.4U CN202122458057U CN217033570U CN 217033570 U CN217033570 U CN 217033570U CN 202122458057 U CN202122458057 U CN 202122458057U CN 217033570 U CN217033570 U CN 217033570U
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light source
center
sample
color
color diffraction
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王博
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Abstract

The utility model provides a colour diffraction testing arrangement and colour diffraction test system includes: the object stage is configured to drive a sample to be tested to rotate in a plane where the object stage is located in the testing process, a rotating shaft of the object stage is a perpendicular bisector of the object stage, and a testing point of the sample to be tested is located on the perpendicular bisector of the object stage; the light source is configured to irradiate a sample to be measured, and the orthographic projection of the light spot center of the light source on the objective table is approximately coincident with the center of the objective table; the measuring instrument and the light source are positioned on the same side of the objective table, the orthographic projection of the measuring center of the measuring instrument on the objective table is approximately superposed with the center of the objective table, and the orthographic projection of the measuring instrument on the objective table and the orthographic projection of the light source on the objective table are not overlapped; the measuring instrument is configured to test a color diffraction phenomenon of a sample to be measured illuminated by the light source.

Description

Color diffraction testing device and color diffraction testing system
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a color diffraction testing apparatus and a color diffraction testing system.
Background
With the development of science and technology, various display devices are widely developed and applied. For example, organic light emitting display devices (OLEDs) have been widely used in the fields of virtual reality displays, wearable devices, smart phones, tablet computers, displays, vehicles, televisions, and the like because of their functions of being ultra-thin, lightweight, flexible, vivid in color, low in power consumption, short in response time, and the like. The flexibility of the OLED widens the application range of the OLED. But OLED has poor bending capability and large bending radius, and can only be used for products such as Edge mobile phones, arm rings, wrist bands, hand rings and the like. With the development of the technology, the bendable radius is reduced, the OLED gradually starts to be used for full-screen mobile phones and watches, and recently, manufacturers gradually release models of folding screens.
SUMMERY OF THE UTILITY MODEL
The embodiment of the disclosure provides a color diffraction testing device and a color diffraction testing system, and the specific scheme is as follows:
in one aspect, a color diffraction testing apparatus provided in an embodiment of the present disclosure includes:
the object stage is configured to drive a sample to be tested to rotate in a plane of the object stage during testing, the rotation axis of the object stage is a perpendicular bisector of the object stage, and a test point of the sample to be tested is on the perpendicular bisector of the object stage;
a light source configured to illuminate the sample to be measured, wherein an orthographic projection of a light spot center of the light source on the stage is approximately coincident with the center of the stage;
the measuring instrument and the light source are positioned on the same side of the object stage, the orthographic projection of the measuring center of the measuring instrument on the object stage is approximately coincident with the center of the object stage, and the orthographic projection of the measuring instrument on the object stage and the orthographic projection of the light source on the object stage do not overlap; the measuring instrument is configured to test a color diffraction phenomenon of the sample to be measured illuminated by the light source.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, further including: the first variable angle guide rail is provided with the measuring instrument;
the measuring instrument moves on the first variable-angle guide rail to change a measuring angle of the measuring instrument, the measuring angle is an included angle between a connecting line of the center of the measuring instrument and the center of the sample to be measured and a perpendicular bisector of the objective table, and an orthographic projection of the center of the sample to be measured on the objective table is approximately coincident with the center of the objective table.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, the apparatus further includes: the second variable-angle guide rail is provided with the light source;
the light source is in the second variable angle guide rail moves to change the incident angle that the light of light source shines to the sample that awaits measuring, incident angle is the line of the center of light source with the center of the sample that awaits measuring with the contained angle between the plumb line of objective table.
In some embodiments, in the above color diffraction testing apparatus provided by embodiments of the present disclosure, the first variable angle guide and the second variable angle guide are symmetrically disposed about a perpendicular bisector of the stage.
In some embodiments, in the color diffraction testing apparatus provided in this disclosure, the first variable-angle guide rail and the second variable-angle guide rail are both arc-shaped, and an orthographic projection of a circle center of the arc on the stage substantially coincides with a center of the stage.
In some embodiments, in the color diffraction testing apparatus provided in the embodiments of the present disclosure, an included angle between a tangent of the arc and a perpendicular bisector of the stage is 0 ° to 80 °.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, further including: the inner surface of the closed shading box body comprises an upper surface and a lower surface which are oppositely arranged, and a first side surface and a second side surface which are connected with the upper surface and the lower surface and are oppositely arranged; wherein the content of the first and second substances,
the lower surface is provided with the objective table, the first side surface is provided with the first variable-angle guide rail, and the second side surface is provided with the second variable-angle guide rail.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, further including: the vertical guide rail is positioned on a central vertical line of the objective table, and the light source is arranged on the vertical guide rail;
the light source moves on the vertical guide rail to change the distance from the light source to the sample to be measured.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, the apparatus further includes: the inner surface of the closed shading box body comprises an upper surface, a lower surface and a side surface, wherein the upper surface and the lower surface are oppositely arranged, and the side surface is used for connecting the upper surface and the lower surface; wherein, the first and the second end of the pipe are connected with each other,
the lower surface is provided with the objective table, the upper surface is provided with the vertical guide rail, and the side surface is provided with a first variable-angle guide rail.
In some embodiments, in the color diffraction testing apparatus provided in the embodiments of the present disclosure, a ratio of a distance from a center of the light source to a center of the sample to be tested to an effective diameter of the light source is greater than or equal to 5 to 10.
In some embodiments, in the color diffraction testing apparatus provided in the embodiments of the present disclosure, a distance from a center of the light source to a center of the sample to be tested is 10cm to 100 cm.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, further including: and the diaphragm is fixed on the light emergent surface of the light source, and the diameter of the diaphragm is adjustable.
In some embodiments, in the color diffraction testing apparatus provided in the embodiments of the present disclosure, the diameter of the diaphragm is 1mm to 5 mm.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, the light source is a white light source.
In some embodiments, in the color diffraction testing apparatus provided in the embodiments of the present disclosure, a distance between a center of the measuring instrument and a center of the sample to be tested is 20cm to 60 cm.
In some embodiments, in the above color diffraction test apparatus provided by the embodiments of the present disclosure, the measurement field angles of the measuring instrument include 0.1 °, 0.2 °, and 1 °.
In another aspect, an embodiment of the present disclosure provides a color diffraction testing system, including the color diffraction testing apparatus provided in an embodiment of the present disclosure.
On the other hand, the embodiment of the present disclosure provides a testing method of the color diffraction testing apparatus, including:
irradiating a sample to be detected on an objective table by adopting a light source, and adjusting the relative position of the light spot center of the light source and the center of the objective table until the light spot center of the light source is approximately superposed with the center of the objective table;
setting a measuring angle of a measuring instrument, and adjusting the relative position of the measuring center of the measuring instrument and the center of the object stage under the measuring angle set for the first time until the measuring center of the measuring instrument is approximately coincided with the center of the object stage;
under each measurement angle, the objective table rotates around the perpendicular bisector of the objective table in the plane of the objective table for one circle, and the measurement instrument measures the brightness L and the color coordinates a and b of the test points of the sample to be measured once per a preset rotation angle in the rotation process, wherein the test points of the sample to be measured are on the perpendicular bisector of the objective table;
the following formula is adopted to characterize the intensity of the color diffraction phenomenon at each measurement angle:
Figure BDA0003300326290000041
Figure BDA0003300326290000042
wherein said Δ labSmaller a, the more white the light color indicating the color diffraction phenomenon, said Δ Eab*
The smaller the brightness of the light representing the color diffraction phenomenon, the smaller the Δ a is the difference between a and the reference color coordinate 0, the smaller the Δ b is the difference between b and the reference color coordinate 0, and the smaller the Δ L is the difference between L
Difference from reference luminance 0.
In some embodiments, in the above testing method provided by the embodiments of the present disclosure, the light source irradiates the sample to be tested vertically, and the measuring instrument is located on one side of the perpendicular bisector of the stage;
the method comprises the following steps of testing the brightness L and the color coordinates a and b of the center of the sample to be tested by the measuring instrument once per preset rotation angle in the rotation process, and specifically comprises the following steps:
the brightness L and the color coordinates a and b of the center of the sample to be measured are measured once by the measuring instrument during the rotation at rotation angles not more than 2 ° apart.
In some embodiments, in the above test method provided by the embodiments of the present disclosure, the light source and the measuring instrument are symmetrically arranged with respect to a perpendicular bisector of the stage;
the method comprises the following steps of testing the brightness L and the color coordinates a and b of the center of the sample to be tested by the measuring instrument once per preset rotation angle in the rotation process, and specifically comprises the following steps:
the brightness L and the color coordinates a and b of the center of the sample to be measured are measured once by the measuring instrument at every rotation angle of not more than 45 ° during the rotation.
Drawings
Fig. 1 is a schematic structural diagram of a color diffraction testing apparatus according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of the observation angle of the color diffraction phenomenon;
FIG. 3 is a schematic view of another structure of a color diffraction testing apparatus according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of a test performed using the color diffraction test apparatus shown in FIG. 1;
FIG. 5 is a schematic diagram of a color diffraction test apparatus shown in FIG. 3.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. It should be noted that the sizes and shapes of the various figures in the drawings are not to scale, but are merely intended to illustrate the present disclosure. And like reference numerals refer to like or similar elements or elements having like or similar functions throughout.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. "inner", "outer", "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the related art, the flexible OLED uses a circular polarizer as an anti-reflection film layer, and has a main function of reducing reflection of metal in the OLED structure to external light, and improving contrast in a bright environment. Since the circular polarizer is easily broken and creased when it is bent, it is necessary to develop a technology for replacing the conventional circular polarizer. Therefore, a technique of mounting a color filter CF (CF on Encapsulation) on the Encapsulation layer TFE is produced. However, the color filter CF in the COE technology includes a black matrix BM in a grid shape and a color resistor R/G/B filling the grid, so that more array structures are introduced, and the color separation phenomenon (i.e., color diffraction phenomenon) of colors near the projection point of the external light source is realized when the screen is in an off-screen state.
At present, all large panel factories develop efforts in the COE technology, and customers pay more attention to the phenomenon of color diffraction. In addition, the Liquid Crystal Display (LCD) also has an array structure introduced by the color film CF, so that a color diffraction phenomenon is also generated under the irradiation of an external light source. Color diffraction phenomena may also occur when the display device includes other microstructures, such as touch metal grids. Therefore, it is very important to objectively evaluate the color diffraction phenomenon.
For the test of the color diffraction phenomenon, it is required to ensure that the three points, namely the center of a light spot formed on the objective table by the external light source, the center of the objective table and the measurement center of the measuring instrument coincide with each other in the rotation process, that is, it is required to ensure that the test points of the sample to be measured borne on the objective table are at the same position. However, the conventional optical testing device is not integrated with an external light source, and after the conventional optical testing device is matched with the external light source, the three points are not integrated, so that the test point position is deviated when the objective table rotates in the testing process, and the color diffraction phenomenon cannot be tested.
In order to solve at least the above technical problems in the related art, embodiments of the present disclosure provide a color diffraction testing apparatus, as shown in fig. 1 and 2, which may include:
an object stage 101, the object stage 101 is configured to drive the sample SL to be tested to rotate in a plane (e.g. xy plane) of the object stage 101 during the test (e.g. the measurement angle θ is fixed, and the object stage 101 rotates by a self-rotation angle
Figure BDA0003300326290000071
Equal to 0 DEG, rotated to
Figure BDA0003300326290000072
Equal to 360 deg.), the axis of rotation (e.g., the z-axis) of the stage 101 being the perpendicular bisector of the stage 101 (i.e., passing through the center O of the stage 101)2And perpendicular to the straight line of the stage 101), the test point of the sample SL to be tested is on the perpendicular bisector of the stage 101; optionally, the sample SL to be detected may include a color film CF or other microstructures, and the sample SL to be detected may be an OLED display product or an LCD display product in a screen-off state; in some embodiments, the stage 101 may haveThe sample SL to be detected can be adsorbed on the objective table 101 due to the adsorption force; certainly, the stage 101 may also fix the sample SL to be measured by clamping or the like, which is not specifically limited herein;
a light source 102, the light source 102 being configured to illuminate a sample SL to be measured, a spot center O of the light source 1021Orthographic projection on the object stage 101 and the center O of the object stage 1012Substantially coincident;
a surveying instrument (LMD)103, the surveying instrument 103 being located on the same side of the stage 101 as the light source 102, a measuring center O of the surveying instrument 1033Orthographic projection on the object stage 101 and the center O of the object stage 1012Approximately coincide with each other, and the orthographic projection of the measuring instrument 103 on the object stage 101 and the orthographic projection of the light source 102 on the object stage 101 do not overlap with each other, so that the measuring instrument 103 does not shield the light source 102 from irradiating the sample SL to be measured on the object stage 101, and the light source 102 does not shield the measuring instrument 103 from detecting the color diffraction phenomenon of the sample SL to be measured; the measuring instrument 103 is configured to test a color diffraction phenomenon of the sample SL to be measured irradiated by the light source 102. Alternatively, the measuring instrument 103 may include a spectrophotometer, an imaging luminance meter, or the like. In some embodiments, in order to avoid the interference of external light, the color diffraction phenomenon can be tested in a dark space. In particular, a dark space means that there is bright light when only the light source 102 is turned on in the space, and there is no other interference light.
In the color diffraction test device provided by the embodiment of the present disclosure, the light spot center O of the light source 102 is used1Center of measurement O of orthographic projection and measurement instrument 103 on stage 1013Orthographic projection on the object stage 101 and the center O of the object stage 1012Approximately coincide such that the three centers O are in the process of rotation of the stage 101 about the perpendicular bisector (e.g., z axis) in the plane (e.g., xy plane) in which it lies1、O2And O3Can coincide all the time together to the relative position of sample SL that awaits measuring and objective table 101 is unchangeable, therefore in the rotatory in-process of objective table 101, the test point of sample SL that awaits measuring is the same point on the perpendicular bisector, can not take place the skew, thereby can realize the test to the color diffraction phenomenon.
In some embodiments, the spot center O of the light source 102 can be controlled by a computer or the like1Center of measurement O of orthographic projection and measurement instrument 103 on stage 1013Orthographic projection on the stage 101, and the center O of the stage 1012Approximately superposed to realize the automatic alignment of the three parts. In addition, if the external light source 102 is used in combination with the conventional optical device, the test layout of the external light source 102 needs to be manually set, and the repeatability is extremely poor, so that the test accuracy and consistency of the color diffraction cannot be ensured. The device integrates the external light source 102, the distance between the light source 102 and the incident angle of the light source 102 can be accurately set, so that the test accuracy and consistency of color diffraction can be ensured, and the test efficiency and repeatability are improved.
It should be noted that "approximately overlapping" referred to in the present disclosure may be exactly overlapping or may have some deviation due to the influence of other factors such as process condition limitation or measurement, and therefore, the relationship of "approximately overlapping" between related features is within the protection scope of the present disclosure as long as the error allowance is satisfied.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, as shown in fig. 1 and 3, the color diffraction test apparatus may further include: a first variable angle guide 104, the first variable angle guide 104 having a measuring instrument 103 disposed thereon; the surveying instrument 103 moves on the first variable angle guide 104 to change a measurement angle θ of the surveying instrument 103, the measurement angle θ being a center O of the surveying instrument 1034And the center O of the sample SL to be measured5Is a connecting line O4O5The angle with the perpendicular bisector (corresponding to the z-axis) of the stage 101, and the center O of the sample SL to be measured5Orthographic projection on the object stage 101 and the center O of the object stage 1012Substantially coinciding.
The first variable angle guide 104 cooperates with the measuring instrument 103 to change the measuring angle θ, so as to test the color diffraction phenomenon of the sample SL under multiple measuring angles θ, thereby representing the color diffraction phenomenon of the sample SL more comprehensively and accurately. In the present disclosure to test the center O of the sample SL to be tested5The color diffraction phenomenon of (B) is taken as an example to sayObviously, in the specific implementation, the center O of the sample SL to be measured can also be determined5The orthographic projection of other positions on the object stage 101 and the center O of the object stage 1012Coincidence to test the center O of the sample SL5And color diffraction phenomena at other locations than the light source.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, as shown in fig. 3, the apparatus may further include: a second variable angle guide 105, the second variable angle guide 105 having the light source 102 disposed thereon; the light source 102 moves on the second variable-angle guide 105 to change the incident angle α of the light beam from the light source 102 to the sample SL, where the incident angle α is the center O of the light source 1026And the center O of the sample SL to be measured5Is a connecting line O5O6The angle to the perpendicular bisector (corresponding to the z-axis) of the stage 101.
Therefore, in the present disclosure, the second variable angle guide 105 is adopted to cooperate with the light source 102 to change the incident angle α, so as to implement the test of the color diffraction phenomenon of the sample SL under multiple incident angles α, thereby making a more comprehensive and accurate representation of the color diffraction phenomenon of the sample SL.
In some embodiments, in the above-described color diffraction testing apparatus provided in the embodiments of the present disclosure, as shown in fig. 3, the first variable-angle guide 104 and the second variable-angle guide 105 may be symmetrically disposed with respect to a perpendicular bisector (corresponding to a z-axis) of the stage 101, so as to facilitate regulation and control that the measuring instrument 103 on the first variable-angle guide 104 and the light source 102 on the second variable-angle guide are symmetrically disposed with respect to the perpendicular bisector (corresponding to the z-axis) of the stage 101, such that the incident angle α and the measuring angle θ have the same degree. Of course, in some embodiments, the measuring instrument 103 on the first variable angle guide 104 and the light source 102 on the second variable angle guide 105 may not be symmetrically disposed about the perpendicular bisector (corresponding to the z-axis) of the stage 101, so that the incident angle α and the measuring angle θ are different in degrees. The arrangement enables diversified combinations to be formed between the incident angle alpha and the measuring angle theta, so that the color diffraction phenomenon of the sample SL to be measured can be tested under the incident angle alpha and the measuring angle theta of different combinations, test data are enriched, and the color diffraction phenomenon of the sample SL to be measured is represented more accurately.
In some embodiments, in the color diffraction testing apparatus provided in the embodiments of the present disclosure, as shown in fig. 1 and 3, the shape of the first variable angle guide 104 and the shape of the second variable angle guide 105 are both arc-shaped, and the center O of the circle where the arc is located is the arc7Orthographic projection on the object table 101 and the center O of the object table 1012Substantially coinciding. This arrangement ensures that the measuring instrument 103 moves back and forth on the first variable angle guide 104 and the light source 102 moves back and forth on the second variable angle guide 105, and the measuring center O of the measuring instrument 1033Orthographic projection on the stage 101, and the spot center O of the light source 1021The orthographic projections on the stage 101 all substantially coincide with the center of the stage 101.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, as shown in fig. 1 and 3, an included angle β between a tangent line a of the arc and a perpendicular bisector (corresponding to a z-axis) of the stage 101 may be 0 ° to 80 °, and as can be seen from fig. 1 and 3, the measurement angle θ is complementary to the included angle β, and thus, the measurement angle θ is 10 ° to 90 °, such as 10 °, 45 °, 60 °, 90 °, and the like. The measurement angle θ of 10 ° to 90 ° may almost include the observation direction of the sample SL to be measured when the user actually uses the sample SL to be measured, so that the color diffraction phenomenon observed by the user in the actual use process may be more accurately reflected by the quantitative data. In fig. 3, it is shown that the incident angle α is symmetrical and equal to the measurement angle θ, that is, the incident angle α is complementary to the angle β, and therefore, the incident angle α may be 10 ° to 90 °, for example, 10 °, 45 °, 60 °, 90 °. The incident angle α of 10 ° to 90 ° may almost include the incident direction of the external environment light on the sample SL to be measured during the actual use of the sample SL by the user, so that the color diffraction phenomenon viewed by the user during the actual use may be more accurately reflected by the quantized data.
In some embodiments, in the present disclosureThe color diffraction testing apparatus provided by the embodiment, as shown in fig. 3, may further include: a closed light-shielding box 106, the inner surface of the closed light-shielding box 106 comprises an upper surface S which is oppositely arranged1And lower surface S2And is connected to the upper surface S1And lower surface S2And oppositely arranged first side surfaces S31And a second side surface S32(ii) a Wherein the lower surface S2On which an object stage 101 is arranged, a first side surface S31Is provided with a first variable angle guide 104 and a second side surface S32On which a second variable angle guide 105 is arranged. The objective table 101, the first variable-angle guide rail 104 (on which the measuring instrument 103 is arranged), and the second variable-angle guide rail 105 (on which the light source 102 is arranged) are arranged inside the closed shading box body 106 together, so that the color diffraction testing device is convenient to carry, and meanwhile, the closed shading box body 106 provides a dark testing environment, so that the testing in a darkroom is not needed, and the testing operation of an operator is convenient.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, as shown in fig. 1, the apparatus may further include: a vertical guide 107, the vertical guide 107 being positioned on a perpendicular bisector (corresponding to the z-axis) of the stage 101, the vertical guide 107 being provided with the light source 102; the light source 102 moves on the vertical guide 107 to change the distance from the light source 102 to the sample SL to be measured. Therefore, in the present disclosure, the vertical guide 107 is adopted to cooperate with the light source 102 to change the distance from the light source 102 to the sample SL to test the color diffraction phenomenon of the sample SL to be tested at different distances, so that the color diffraction phenomenon of the sample SL to be tested can be represented more comprehensively and accurately.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, in order to better characterize the color diffraction phenomenon, the center O of the light source 1026To the center O of the sample SL to be measured5May be greater than or equal to the ratio of the distance of (a) to the effective diameter of the light source 102 (the light emitted by the light source 102 within the effective diameter range can be irradiated onto the sample SL to be measured)5 to 10. Optionally, the center O of the light source 1026To the center O of the sample SL to be measured5The distance of (c) may be from 10cm to 100cm, for example 40 cm.
In some embodiments, in the color diffraction testing apparatus provided in the embodiments of the present disclosure, as shown in fig. 1 and fig. 3, the color diffraction testing apparatus may further include: the diaphragm 108, the diaphragm 108 is fixed on the light exit surface of the light source 102, and the diameter of the diaphragm 108 is adjustable, so that the effective diameter of the light source 102 can be adjusted and controlled by adjusting the diameter of the diaphragm 108. Alternatively, the aperture 108 may have a diameter of 1mm to 5mm, and correspondingly, the effective diameter of the light source 102 may be 1mm to 5mm, for example 2 mm.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, in order to better reflect the color diffraction phenomenon viewed by the user, the light source 102 is preferably a white light source including the entire visible light spectrum, such as a CIE a light source or a D65 light source, and in particular, a CIE a light source having a standard spectrum is used. In some embodiments, a point source or a collimated source may be selected in order to simulate actual light source conditions. Optionally, the intensity of the light source 102 is adjustable to ensure that the illumination intensity on the sample SL to be measured is in a range of 100lx to 500lx, for example, 300lx, so as to simulate the color diffraction phenomenon caused by external environment light (such as lamp light or sunlight) with different brightness in the actual use process of the user.
In some embodiments, in the color diffraction test apparatus provided by the embodiments of the present disclosure, the center O of the measuring instrument 1034With the center O of the sample SL to be measured5The distance between may be 20cm to 60cm, for example 50 cm. Since the distance from the eyes of the user to the sample SL to be measured is approximately 20cm to 60cm in the process of using the sample SL to be measured, the color diffraction phenomenon detected by the measuring instrument 103 can be similar to the color diffraction phenomenon observed by the user in the process of using the sample SL to be measured in the distance range of 20cm to 60cm, which is equivalent to objectively quantifying the visual perception of the color diffraction phenomenon by the human eyes.
In some embodiments, in the color diffraction test apparatus provided in the embodiments of the present disclosure, in order to more finely embody the color diffraction phenomenon, the measurement field angles (i.e., the lighting range) of the measurement instrument 103 may include 0.1 °, 0.2 ° and 1 °, specifically, the measurement instrument 103 may have three measurement field angles of 0.1 °, 0.2 ° and 1 °, and in the actual test process, one of the three measurement field angles may be selected. For example, in some embodiments, a measurement field angle of 0.2 ° may be selected for testing.
In some embodiments, in the case that the color diffraction testing apparatus provided by the embodiments of the present disclosure includes the vertical guide rail 107, as shown in fig. 1, the lower surface S of the closed light shielding box 106 may be2An upper stage 101 is provided on the upper surface S1Is provided with a vertical guide rail 107 and is provided on the side surface S3(e.g., first side surface S)31) On which a first variable angle guide 104 is provided. The object stage 101, the first variable-angle guide rail 104 (on which the measuring instrument 103 is arranged), and the vertical guide rail 107 (on which the light source 102 is arranged) are arranged inside the closed shading box 106 together, so that the color diffraction testing device is convenient to carry, and meanwhile, the closed shading box 106 provides a dark testing environment, so that the testing in a dark room is not needed, and the testing operation of an operator is convenient.
Based on same utility model conceive, this disclosed embodiment provides a colour diffraction test system, including the above-mentioned colour diffraction testing arrangement that this disclosed embodiment provided. Because the principle of solving the problems of the color diffraction test system is similar to that of solving the problems of the color diffraction test device, the implementation of the color diffraction test system can refer to the embodiment of the color diffraction test device, and repeated parts are not repeated.
At present, the photoelectric testing method for display devices mainly measures the traditional parameters such as brightness, chromaticity, color fidelity, etc. under the darkroom condition. Wherein, the brightness test is carried out by the following method: the display device and the measuring instrument are oppositely arranged; then, a driving signal is added to the display device to enable the full screen to be at the highest gray level to obtain the light emitting level, and a 100% white signal is added to enable the full screen to emit white light with the maximum brightness; and finally, testing the central brightness of the display device by using a measuring instrument. The chroma test method is as follows: the difference from the brightness test method is that the CIE1931 chromaticity coordinates (x, y) of each primary color, which can also be expressed as CIE1976 UCS chromaticity coordinates u ', v', are measured by adding 100% of the white, red, green, and blue signals. The color fidelity test method is as follows: the difference between the luminance test method and the chromaticity test method is that 100% of red, green, blue, yellow, cyan, magenta signals are added to test tristimulus values Xn, Yn, Zn of white signals as reference white coordinate values, which are calculated as follows:
the test data for primary and secondary primaries are converted to CIE LAB color coordinates by equations (1), (2), (3):
L*=116f(Y/Yn)-16 (1)
a*=500[f(X/Xn)-f(Y/Yn)] (2)
b*=200[f(Y/Yn)-f(Z/Zn)] (3)
in the formula:
Figure BDA0003300326290000131
the difference between the two stimulus values is quantified using the following color difference equation, as shown in equation (4):
Figure BDA0003300326290000132
in the formula,. DELTA.L*、Δa*、Δb*As reference color data and test data L*、a*、b*A difference in value;
the existing test methods refer to IEC international standard and national standard, IEC 62341-6-1 and IEC 62341-6-3, and the color diffraction phenomenon cannot be objectively characterized.
In order to achieve objective characterization of diffraction phenomenon, embodiments of the present disclosure provide a testing method of a color diffraction testing apparatus, as shown in fig. 4 and 5, which may include the following steps:
the method comprises the following steps that firstly, a light source is adopted to irradiate a sample to be measured on an objective table, and the relative position of the light spot center of the light source and the center of the objective table is adjusted until the light spot center of the light source is approximately coincident with the center of the objective table;
secondly, setting a measuring angle of the measuring instrument, and adjusting the relative position of the measuring center of the measuring instrument and the center of the object stage under the measuring angle set for the first time until the measuring center of the measuring instrument is approximately superposed with the center of the object stage;
third, at each measurement angle, the stage is rotated in the plane of the stage by one revolution (e.g. from the angle of rotation) about the stage's perpendicular bisector
Figure BDA0003300326290000133
Equal to 0 DEG, rotated to
Figure BDA0003300326290000134
Equal to 360 °), and the brightness L and the color coordinates a and b of a test point (e.g., the center) of the sample to be measured on the perpendicular bisector of the stage are measured by the measuring instrument every time the sample to be measured is rotated by a preset angle during the rotation;
and fourthly, representing the intensity of the color diffraction phenomenon at each measurement angle by adopting the following formula:
Figure BDA0003300326290000141
Figure BDA0003300326290000142
wherein Δ labThe smaller the value of Δ E, the more white the light color is, which indicates the color diffraction phenomenonabThe smaller the light intensity, the weaker the color diffraction phenomenon, Δ a is the difference between a and the reference color coordinate 0, Δ b is the difference between b and the reference color coordinate 0, and Δ L is the difference between L and the reference intensity 0.
In the above-described test methods provided by embodiments of the present disclosure, based on the CIE LAB color coordinate system,interpolation of Δ E using irradiance spectraabSum color channel interpolation Δ labUnder the condition that the position of the light source and the position of the measuring instrument are fixed, and the rotation angle of the objective table is matched
Figure BDA0003300326290000143
The whole color diffraction phenomenon and the degree of the whole color diffraction phenomenon of the display device are quantitatively and objectively represented, so that a reference basis is provided for technical development and customer delivery.
Generally, in the CIE LAB color coordinate system, the color coordinate origin is (L ═ 0, a ═ 0, b ═ 0), the luminance L is equal to 0, i.e. representing black, the luminance L is equal to 100, i.e. representing white; the color coordinate a is equal to a negative value to represent green, and the color coordinate a is equal to a positive value to represent red; the color coordinate b is equal to a negative value, i.e. representing blue, and the color coordinate b is equal to a positive value, i.e. representing yellow.
In some embodiments, in the above-mentioned testing method provided by the embodiments of the present disclosure, as shown in fig. 4, the light source 102 vertically irradiates the sample SL to be tested (corresponding to the xy plane where the vertical stage 101 is located), and the measuring instrument 103 is located on one side of the perpendicular bisector (corresponding to the z axis) of the stage 101; at this time, in the process of rotating the object stage 101 around the z axis in the xy plane, the light source 102 is always located on the z axis, and the measuring instrument 103 rotates in the xz plane relative to the object stage 101, and the color diffraction phenomenon difference in each test direction may be large, so that the color diffraction phenomenon needs to be tested once at a small angle (for example, not more than 2 °). In other words, the third step of "testing the brightness L and the color coordinates a and b of the center of the sample to be measured by the measuring instrument once per a preset angle of rotation during the rotation" may be performed by: the brightness L and the color coordinates a and b of the center of the sample to be measured are measured by the measuring instrument once per rotation angle interval during the rotation.
In some embodiments, in the above-described test method provided by the embodiments of the present disclosure, as shown in fig. 5, the light source 102 and the measuring instrument 103 are symmetrically disposed with respect to a perpendicular bisector (corresponding to the z-axis) of the stage 101; at this time, in the process of rotating the stage 101 around the z axis in the xy plane, the light source 102 and the measuring instrument 103 rotate in the xz plane with respect to the stage 101, and the color diffraction phenomenon difference in each test direction is small, so that the color diffraction phenomenon can be tested once at large angles (for example, not more than 45 °). In other words, the third step of "testing the brightness L of the center of the sample to be measured and the color coordinates a and b by the measuring instrument every time the sample is rotated by the preset angle during the rotation" may be performed by: the brightness L and the color coordinates a and b of the center of the sample to be measured are measured once by the measuring instrument at every rotation angle of not more than 45 ° during the rotation. Of course, the test may be performed at intervals of 30 °, 60 °, etc., and is not limited in particular.
It will be apparent that, although preferred embodiments of the present disclosure have been described, various modifications and variations can be made to the disclosed embodiments by those skilled in the art without departing from the spirit and scope of the disclosed embodiments. Thus, if such modifications and variations of the embodiments of the present disclosure are within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to encompass such modifications and variations.

Claims (17)

1. A color diffraction test apparatus, comprising:
the object stage is configured to drive a sample to be tested to rotate in a plane of the object stage in a testing process, a rotating shaft of the object stage is a perpendicular bisector of the object stage, and a test point of the sample to be tested is on the perpendicular bisector of the object stage;
a light source configured to illuminate the sample to be measured, wherein an orthographic projection of a light spot center of the light source on the object stage is approximately coincident with the center of the object stage;
the surveying instrument and the light source are positioned on the same side of the object stage, the orthographic projection of the surveying instrument on the object stage is approximately coincident with the center of the object stage, and the orthographic projection of the surveying instrument on the object stage and the orthographic projection of the light source on the object stage are not overlapped; the measuring instrument is configured to test a color diffraction phenomenon of the sample to be measured illuminated by the light source.
2. The color diffraction test apparatus of claim 1, further comprising: the first variable angle guide rail is provided with the measuring instrument;
the measuring instrument moves on the first variable-angle guide rail to change a measuring angle of the measuring instrument, the measuring angle is an included angle between a connecting line of the center of the measuring instrument and the center of the sample to be measured and a perpendicular bisector of the objective table, and an orthographic projection of the center of the sample to be measured on the objective table is approximately coincident with the center of the objective table.
3. The color diffraction test apparatus of claim 2, further comprising: the second variable-angle guide rail is provided with the light source;
the light source is in the second variable angle guide rail moves to change the incident angle that the light of light source shines to the sample that awaits measuring, incident angle is the line of the center of light source with the center of the sample that awaits measuring with the contained angle between the plumb line of objective table.
4. The color diffraction test device of claim 3, wherein the first variable angle guide and the second variable angle guide are symmetrically disposed about a perpendicular bisector of the stage.
5. The color diffraction test apparatus of claim 4, wherein the first variable angle guide and the second variable angle guide are each shaped as an arc, and an orthographic projection of a center of a circle on the stage of the arc substantially coincides with a center of the stage.
6. The color diffraction test apparatus of claim 5, wherein an angle between a tangent of the arc and a perpendicular bisector of the stage is in a range of 0 ° to 80 °.
7. The color diffraction test apparatus of any one of claims 2 to 6, further comprising: the inner surface of the closed shading box body comprises an upper surface, a lower surface, a first side surface and a second side surface, wherein the upper surface and the lower surface are oppositely arranged, and the first side surface and the second side surface are connected with the upper surface and the lower surface and are oppositely arranged; wherein the content of the first and second substances,
the lower surface is provided with the objective table, the first side surface is provided with the first variable-angle guide rail, and the second side surface is provided with the second variable-angle guide rail.
8. The color diffraction test apparatus of claim 2, further comprising: the vertical guide rail is positioned on a central vertical line of the objective table, and the light source is arranged on the vertical guide rail;
the light source moves on the vertical guide rail to change the distance from the light source to the sample to be measured.
9. The color diffraction test apparatus of claim 8, further comprising: the inner surface of the closed shading box body comprises an upper surface, a lower surface and a side surface, wherein the upper surface and the lower surface are oppositely arranged, and the side surface is used for connecting the upper surface and the lower surface; wherein the content of the first and second substances,
the lower surface is provided with the objective table, the upper surface is provided with the vertical guide rail, and the side surface is provided with a first variable-angle guide rail.
10. The color diffraction test apparatus according to any one of claims 3 to 6, 8, and 9, wherein a ratio of a distance from a center of the light source to a center of the sample to be tested to an effective diameter of the light source is 5 to 10.
11. The color diffraction test device according to claim 10, wherein the distance from the center of the light source to the center of the sample to be tested is 10cm to 100 cm.
12. The color diffraction test apparatus of any one of claims 1 to 6, 8, 9, and 11, further comprising: and the diaphragm is fixed on the light emergent surface of the light source, and the diameter of the diaphragm is adjustable.
13. The color diffraction test apparatus of claim 12, wherein the diaphragm has a diameter of 1mm to 5 mm.
14. The color diffraction test device of any one of claims 1 to 6, 8, 9, 11, and 13, wherein the light source is a white light source.
15. The color diffraction test apparatus as claimed in any one of claims 1 to 6, 8, 9, 11, and 13, wherein a distance between a center of the measuring instrument and a center of the sample to be tested is 20cm to 60 cm.
16. The color diffraction test apparatus according to any one of claims 1 to 6, 8, 9, 11, and 13, wherein measurement field angles of the measuring instrument include 0.1 °, 0.2 °, and 1 °.
17. A color diffraction test system comprising the color diffraction test apparatus according to any one of claims 1 to 16.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023061170A1 (en) * 2021-10-12 2023-04-20 京东方科技集团股份有限公司 Color diffraction test device and test method thereof, and color diffraction test system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023061170A1 (en) * 2021-10-12 2023-04-20 京东方科技集团股份有限公司 Color diffraction test device and test method thereof, and color diffraction test system

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