CN114136243A - Device for measuring flatness of display panel - Google Patents
Device for measuring flatness of display panel Download PDFInfo
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- CN114136243A CN114136243A CN202111212073.3A CN202111212073A CN114136243A CN 114136243 A CN114136243 A CN 114136243A CN 202111212073 A CN202111212073 A CN 202111212073A CN 114136243 A CN114136243 A CN 114136243A
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- 238000005452 bending Methods 0.000 claims abstract description 150
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- 238000005286 illumination Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
Abstract
The invention relates to the technical field of display panels and discloses a device for measuring the flatness of a display panel. The device comprises a light source, wherein the light source is used for outputting measuring beams to measuring points on the display panel, the measuring points comprise bending area measuring points and flat area measuring points, the bending area measuring points are located in a bending area, and the flat area measuring points are located in a flat area. The device also comprises a light receiving component, the measuring light beam is reflected by the measuring point to obtain a reflected light beam, and the reflected light beam is transmitted to the light receiving component; and the difference between the reflected light beam corresponding to the bending area measuring point and the reflected light beam corresponding to the flat area measuring point is used for evaluating the flattening degree of the display panel. Through the mode, the accuracy of measuring the flatness of the display panel can be improved.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a device for measuring the flatness of a display panel.
Background
With the popularization of flexible display screens, various application scenes enter the public life, wherein the flexible display screen with the highest heat is applied to a folding mobile phone. However, with the increase of the use frequency of the user, after the flexible display screen is bent (folded inwards or outwards) for multiple times and then unfolded, the bending area is uneven, the display image quality of the area is affected, and the user experience is poor.
Therefore, in the links of research and development and production of the flexible display screen, the flattening degree of the bending area of the flexible display screen is evaluated when the bending area of the flexible display screen is folded for multiple times, and the flexible display screen leaving the factory can meet the use requirements of users. However, in the existing method for evaluating the flattening degree of the bending area of the flexible display screen, whether a crease exists is generally perceived subjectively by a worker through human eyes to evaluate whether the flexible display screen meets the specification requirement, and the method has a large error and cannot accurately reflect the flattening degree of the bending area of the flexible display screen.
Disclosure of Invention
In view of the above, the present invention provides a device for measuring the flatness of a display panel, which can improve the accuracy of measuring the flatness of the display panel.
In order to solve the technical problems, the invention adopts a technical scheme that: a device for measuring the flatness of a display panel is provided. The device comprises a light source, wherein the light source is used for outputting measuring beams to measuring points on the display panel, the measuring points comprise bending area measuring points and flat area measuring points, the bending area measuring points are located in a bending area, and the flat area measuring points are located in a flat area. The device also comprises a light receiving component, the measuring light beam is reflected by the measuring point to obtain a reflected light beam, and the reflected light beam is transmitted to the light receiving component; and the difference between the reflected light beam corresponding to the bending area measuring point and the reflected light beam corresponding to the flat area measuring point is used for evaluating the flattening degree of the display panel.
In an embodiment of the present invention, a light receiving assembly includes a first light receiving element and a second light receiving element; the measuring light beam generates mirror reflection through the measuring point to obtain a first reflected light beam, the first reflected light beam is transmitted to the first light receiving element to determine the light intensity of the first reflected light beam, the measuring light beam generates diffuse reflection through the measuring point to obtain a second reflected light beam, the second reflected light beam is transmitted to the second light receiving element to determine the light intensity of the second reflected light beam, and the light intensity of the first reflected light beam and the light intensity of the second reflected light beam have target difference values; and the difference between the target difference value corresponding to the bending area measuring point and the target difference value corresponding to the flat area measuring point is used for evaluating the flattening degree of the display panel.
In an embodiment of the present invention, the light receiving assembly further includes an integrating sphere; the light source and the first light receiving element are arranged on the side wall of the integrating sphere, a measuring window is further formed in the side wall of the integrating sphere, and the measuring window is used for exposing a measuring point after the integrating sphere is in butt joint with the display panel; the light source and the first light receiving element are symmetrically distributed by taking an axis as a symmetry axis, wherein the axis passes through the center of the measuring window and the spherical center of the integrating sphere; the second light receiving element is arranged on the side wall of the integrating sphere except the position of the light source and the position of the first light receiving element.
In an embodiment of the invention, the target difference value is a ratio of the light intensity of the second reflected light beam to the light intensity of the first reflected light beam.
In an embodiment of the present invention, the bending region includes a main bending region and a transition region, and the main bending region is connected to the flat region through the transition region; the bending zone measuring points comprise main bending zone measuring points and transition zone measuring points, the main bending zone measuring points are located in the main bending zone, and the transition zone measuring points are located in the transition zone; the difference between the target difference value corresponding to the main bending area measuring point and the target difference value corresponding to the flat area measuring point is the main bending area difference value, the difference between the target difference value corresponding to the transition area measuring point and the target difference value corresponding to the flat area measuring point is the transition area difference value, and the difference between the transition area difference value and the main bending area difference value is used for evaluating the flattening degree of the display panel.
In an embodiment of the present invention, the difference value of the main bending area is a ratio of a difference between a target difference value corresponding to the measurement point of the main bending area and a target difference value corresponding to the measurement point of the flat area to a sum of the target difference value and the target difference value; the difference value of the transition area is the ratio of the difference between a target difference value corresponding to the measurement point of the transition area and a target difference value corresponding to the measurement point of the flat area to the sum of the target difference value and the target difference value.
In an embodiment of the present invention, the flat area includes a first flat area and a second flat area, the first flat area and the second flat area are respectively located at two opposite sides of the main bending area, the transition area includes a first transition area and a second transition area, the main bending area is connected with the first flat area through the first transition area, and the main bending area is connected with the second flat area through the second transition area; the flat zone measuring points comprise a first flat zone measuring point and a second flat zone measuring point, the first flat zone measuring point is positioned in the first flat zone, and the second flat zone measuring point is positioned in the second flat zone; the transition region measuring points comprise a first transition region measuring point and a second transition region measuring point, the first transition region measuring point is positioned in the first transition region, and the second transition region measuring point is positioned in the second transition region; the main bending area measuring point and the first flat area measuring point have a first main bending area difference value, the first transition area measuring point and the first flat area measuring point have a first transition area difference value, the main bending area measuring point and the second flat area measuring point have a second main bending area difference value, the second transition area measuring point and the second flat area measuring point have a second transition area difference value, the first transition area difference value and the first main bending area difference value have a first difference value, the second transition area difference value and the second main bending area difference value have a second difference value, and the larger of the first difference value and the second difference value is used for evaluating the flatness of the display panel.
In an embodiment of the present invention, a target difference value corresponding to the first transition region measurement point is CB1The target difference value corresponding to the main bending area measuring point is CB2The target difference value corresponding to the second transition region measuring point is CB3The target difference value corresponding to the first flat zone measuring point is CAThe target difference value corresponding to the second flat area measuring point is CCThe flatness of the display panel is JND, wherein:
M＝|(CB1-CA)/(CB1+CA)-(CB2-CA)/(CB2+CA)|
N＝|(CB3-CC)/(CB3+CC)-(CB2-CC)/(CB2+CC)|
JND＝Max(M,N)/0.004。
in an embodiment of the present invention, the bending radius of the main bending region is R; the length of the transition area in the first direction is greater than or equal to R/2, wherein when the display panel is flattened, the main bending area, the transition area and the flat area are sequentially arranged along the first direction; the transition region measurement point is located at an edge of the transition region adjacent to the flat region.
In an embodiment of the present invention, the bending radius of the bending region is R; the measuring beam is formed with a light spot at a measuring point, and the diameter of the light spot is greater than or equal to 0.78mm and less than or equal to R/2.
The invention has the beneficial effects that: different from the prior art, the invention provides a device for measuring the flatness of a display panel. The light source of the device outputs measuring beams to measuring points on the display panel, the measuring beams are reflected by the measuring points to obtain reflected beams, and the reflected beams are transmitted to the light receiving component. The measuring points comprise bending area measuring points and flat area measuring points, and the difference between the reflected light beams corresponding to the bending area measuring points and the reflected light beams corresponding to the flat area measuring points is used for evaluating the flatness of the display panel, which means that the flatness of the display panel can be quantitatively evaluated, so that the accuracy of measuring the flatness of the display panel can be improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. Moreover, these drawings and written evaluation are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
FIG. 1 is a schematic diagram of a prior art technique for evaluating the flatness of a flexible display screen;
FIG. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the display panel shown in FIG. 2 in a bent state;
FIG. 4 is a schematic structural diagram of an embodiment of an apparatus for measuring flatness of a display panel according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely evaluated in combination with the embodiments of the present invention, and it is obvious that the evaluated embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
In order to solve the technical problem of low accuracy in measuring the flatness of the display panel in the prior art, an embodiment of the present invention provides a device for measuring the flatness of the display panel. The device comprises a light source, wherein the light source is used for outputting measuring beams to measuring points on the display panel, the measuring points comprise bending area measuring points and flat area measuring points, the bending area measuring points are located in a bending area, and the flat area measuring points are located in a flat area. The device also comprises a light receiving component, the measuring light beam is reflected by the measuring point to obtain a reflected light beam, and the reflected light beam is transmitted to the light receiving component; and the difference between the reflected light beam corresponding to the bending area measuring point and the reflected light beam corresponding to the flat area measuring point is used for evaluating the flattening degree of the display panel. As described in detail below.
For the application scenes that the flexible display screen is applied to the folding mobile phone and the like, a certain space is reserved between the folding hinge structure of the existing folding mobile phone and the bending area of the flexible display screen, so that a certain gap exists below the flexible display screen after the flexible display screen is unfolded, and folds of different degrees can appear in the bending area after the bending area of the flexible display screen is bent and stretched for multiple times.
Referring to fig. 1, in the conventional method for evaluating the flatness of the bending area 11 of the flexible display screen 10, the flexible display screen 10 is usually placed in an environment with a certain illumination intensity, and whether a crease exists is subjectively sensed by human eyes by changing the angle of the flexible display screen 10, so as to evaluate whether the flexible display screen 10 meets the specification requirements. The premise of this scheme is that under keeping fixed illuminance, flexible display screen 10 is observed from different visual angles, however in actual conditions, the error that illuminance and visual angle were introduced can influence the observation result, and great error more can be introduced to the mode of human eye subjective perception, lead to the flattening degree of the bending zone 11 that flexible display screen 10 can't accurately be reflected to current scheme, also can't the quantitative evaluation flattening degree, mean that can't provide the quantization data for product research and development, and can't provide the quantization standard who weighs the certified products, it can satisfy user's user demand to guarantee hardly that the product of leaving the factory.
In view of the above, an embodiment of the present invention provides an apparatus for measuring the flatness of a display panel, which can quantitatively evaluate the flatness of the display panel, thereby improving the accuracy of measuring the flatness of the display panel.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the invention, and fig. 3 is a schematic structural diagram of the display panel shown in fig. 2 in a bent state.
The flatness of the display panel 20 is used to measure the flatness of the display panel 20 after it is flattened from the bent state. The less obvious the fold of the flattened display panel 20, the flatter the flattened display panel 20 is, the better the flattening degree is, otherwise, the opposite is true. Moreover, the display panel 20 of the present invention may be a flexible display panel 20, and the flatness of the display panel 20 is measured by using the apparatus provided in the embodiment of the present invention.
The display panel 20 is divided into a bending region 21 and a flat region 22 adjacent to each other. The display panel 20 in the bending region 21 can be bent relative to the display panel 20 in the flat region 22, wherein the bending radius is R, as shown in fig. 3. The display panel 20 in the bending region 21 is bent, and the display panel 20 in the flat region 22 is kept in a flat state, so that after the display panel 20 is flattened, the flatness of the display panel 20 can be quantitatively evaluated through the difference between the bending region 21 and the flat region 22 of the display panel 20. It is understood that the smaller the difference between the bending region 21 and the flat region 22 of the display panel 20, the flatter the display panel 20 after being flattened, the less obvious the crease, and vice versa.
Referring to fig. 2 to 4, fig. 4 is a schematic structural diagram of an embodiment of a device for measuring the flatness of a display panel according to the present invention.
In one embodiment, the device for measuring the flatness of the display panel includes a light source 30, and the light source 30 is used for outputting a measuring light beam to a measuring point on the display panel 20 (as shown in S1 in fig. 4). The apparatus further includes a light receiving assembly 40. The measuring beam output from the light source 30 is reflected by the measuring point to obtain a reflected beam (including a first reflected beam and a second reflected beam hereinafter), and the reflected beam is transmitted to the light receiving element 40. It is understood that the display panel 20 may be in a flattened state during the process of measuring the flatness of the display panel 20.
The measurement points include a bending region measurement point (e.g., a first transition region measurement point B1, a main bending region measurement point B2, and a second transition region measurement point B3, which are described below) located at the bending region 21 of the display panel 20 and a flat region measurement point (e.g., a first flat region measurement point a, and a second flat region measurement point C, which are described below) located at the flat region 22 of the display panel 20. Because the flat condition of the display panel 20 of the bending region 21 can affect the reflected light beam corresponding to the bending region measuring point, the reflected light beam corresponding to the bending region measuring point and the reflected light beam corresponding to the flat region measuring point have a difference, wherein the flatter the display panel 20 of the bending region 21, the closer the flat condition of the display panel 20 of the bending region 21 is to the flat condition of the display panel 20 of the flat region 22, the smaller the difference between the reflected light beam corresponding to the bending region measuring point and the reflected light beam corresponding to the flat region measuring point is, the better the flattening degree of the display panel 20 is, and vice versa.
Therefore, the difference between the reflected light beam corresponding to the bending region measuring point and the reflected light beam corresponding to the flat region measuring point is used to evaluate the flatness of the display panel 20 in the present embodiment, which means that the present embodiment can quantitatively evaluate the flatness of the display panel 20. Compared with the traditional method of subjective perception of the crease by human eyes, the method can improve the accuracy of measuring the flatness of the display panel 20.
Moreover, since the measuring beam can penetrate through the display panel 20 and reflect on the surface of the film layer inside the display panel 20, the device provided by the invention can measure not only the flatness of the surface of the display panel 20, but also the flatness of the film layer inside the display panel 20, that is, the condition that the fold is located inside the display panel 20, and further can improve the accuracy of measuring the flatness of the display panel 20.
Alternatively, the light intensity of the measuring beam output by the light source 30 may be 500lux to 5000lux, such as 500lux, 1000lux, 2000lux, 3000lux, 4000lux, 5000lux, and the like, which is not limited herein.
For the above-mentioned situation that the measuring points include the bending area measuring points and the flat area measuring points, it is described that the number of the measuring points in this embodiment is plural, and therefore the device for measuring the flatness of the display panel in this embodiment measures each measuring point one by one to obtain the reflected light beam corresponding to each measuring point, and further evaluates the flatness of the display panel 20.
Of course, in other embodiments of the present invention, it is also possible to measure a plurality of measuring points simultaneously, wherein the measuring beams output to each measuring point are parallel to each other, i.e. parallel light, and the light receiving assembly 40 is disposed at a corresponding position to receive the reflected light beams corresponding to each measuring point, so as to evaluate the flatness of the display panel 20.
Please continue to refer to fig. 4. In an embodiment, the light receiving assembly 40 includes a first light receiving element 41 and a second light receiving element 42. The measuring beam is specularly reflected by the measuring point to obtain a first reflected beam (as shown in S2 in fig. 4, the same applies below), which is transmitted to the first light-receiving element 41 to determine the light intensity of the first reflected beam. The measuring beam is diffusely reflected by the measuring point to obtain a second reflected beam (as shown in S3 in fig. 4, the same applies below), and the second reflected beam is transmitted to the second light-receiving element 42 to determine the light intensity of the second reflected beam.
Since the light intensity of the first reflected light beam and the light intensity of the second reflected light beam have a rule of their length along with the flatness of the measuring point, specifically, the flatter the position of the measuring point on the display panel 20 is, the greater the degree of specular reflection and the smaller the degree of diffuse reflection of the measuring point are, which means the greater the light intensity of the first reflected light beam and the smaller the light intensity of the second reflected light beam are; the more uneven the position of the measuring point on the display panel 20, the smaller the degree of specular reflection and the larger the degree of diffuse reflection of the measuring beam at the measuring point, which means that the light intensity of the first reflected light beam is smaller and the light intensity of the second reflected light beam is larger.
Therefore, in this embodiment, the light intensity of the first reflected light beam and the light intensity of the second reflected light beam have target difference values, and the target difference values describe the conditions of the reflected light beams corresponding to the measuring points, so that the difference between the reflected light beams corresponding to the measuring points in the bending region and the reflected light beams corresponding to the measuring points in the flat region can be evaluated by using the difference between the target difference values corresponding to the measuring points in the bending region and the target difference values corresponding to the measuring points in the flat region, and further, the difference can be used for evaluating the flatness of the display panel 20.
Moreover, just as the light intensity of the first reflected light beam and the light intensity of the second reflected light beam have a rule of eliminating their lengths along with the flatness of the measurement point, the difference between the light intensity of the first reflected light beam and the light intensity of the second reflected light beam can obviously change along with the change of the flatness of the measurement point, i.e. has a large change range, so that the difference of the flatness of different measurement points can be sensitively reflected by the target difference value corresponding to the measurement point in this embodiment, and the sensitivity of measuring the flatness of the display panel 20 can be improved.
And along with the change of the flatness of the measuring point, the change amplitude of the light intensity of the first reflected light beam and the light intensity of the second reflected light beam is small, and if the difference of the flatness of the measuring point cannot be reflected sensitively only by the light intensity difference of the first reflected light beam or only by the light intensity difference of the second reflected light beam.
Further, the light receiving module 40 further includes an integrating sphere 43. The light source 30, the first light receiving element 41, and the second light receiving element 42 are provided on the side wall of the integrating sphere 43. The side wall of the integrating sphere 43 is further opened with a measuring window 44, and the measuring window 44 is used for exposing the measuring point after the integrating sphere 43 is butted with the display panel 20.
Specifically, when the device of the present embodiment is used to measure the flatness of the display panel 20, the side of the integrating sphere 43 having the measurement window 44 is butted with the flattened display panel 20, and the measurement window 44 exposes the measurement point, so that the measurement beam output by the light source 30 on the integrating sphere 43 can be transmitted to the measurement point. The measuring beam is specularly reflected at the measuring point to obtain a first reflected beam, which is transmitted to the first light receiving element 41 to be received by the first light receiving element 41, so that the light intensity of the first reflected beam is determined by the first light receiving element 41. The measuring beam is diffusely reflected at the measuring point to obtain a second reflected beam, the transmission direction of the measuring beam in the reflected light of the measuring point is different from that of the first reflected beam, the second reflected beam is transmitted to the inner wall of the integrating sphere 43 and continuously reflected for multiple times on the inner wall of the integrating sphere 43, uniform illumination is formed on the inner wall of the integrating sphere 43, and then the second reflected beam is received by the second light receiving element 42, and the light intensity of the second reflected beam is determined by the second light receiving element 42.
The integrating sphere 43 is a hollow sphere whose inner wall is coated with a diffuse reflection material, and is also called a photometric sphere, a light flux sphere, or the like. The light beam inside the integrating sphere 43 is reflected multiple times through the coating of the inner wall thereof to form uniform illumination on the inner wall of the integrating sphere 43. Integrating sphere 43 is within the understanding of those skilled in the art and will not be described in detail herein.
Further, the light source 30 and the first light receiving element 41 are symmetrically distributed with an axis P passing through the center O1 of the measurement window 44 and the spherical center O2 of the integrating sphere 43 as an axis of symmetry. Based on the characteristic of specular reflection, after the integrating sphere 43 and the display panel 20 are butted, the angle formed by the measuring beam and the surface of the display panel 20 facing the integrating sphere 43 is equal to the angle formed by the first reflected beam and the surface of the display panel 20 facing the integrating sphere 43, where the axis P is a normal line, and the light source 30 and the first light receiving element 41 are symmetrically distributed with the axis P as a symmetry axis, so that the first reflected beam formed after the measuring beam output by the light source 30 is specularly reflected at the measuring point can be received by the first light receiving element 41.
The second light receiving element 42 is disposed on the sidewall of the integrating sphere 43 at a position other than the position of the light source 30 and the position of the first light receiving element 41. The second light receiving element 42 is located at a position different from the position where the first light receiving element 41 is located, and it can be ensured that the first reflected light beam is received by the first light receiving element 41 without being received by the second light receiving element 42, and the second reflected light beam is received by the second light receiving element 42 without being received by the first light receiving element 41. Fig. 4 shows that the second light receiving element 42 is disposed close to the light source 30 relative to the first light receiving element 41, for example only, and not by way of limitation.
Alternatively, the first light receiving element 41 and the second light receiving element 42 may be one of an optical measuring instrument and an optical sensor, and are not limited herein.
Please continue to refer to fig. 2 and 4. In one embodiment, the measuring beam output by the light source 30 forms a light spot S11 at the position of the measuring point. Considering that the size of the light spot S11 is too large, the light spot S11 easily covers both the fold area and the flat area, so that the reflected light beam corresponding to the measuring point cannot correctly reflect the flattening condition of the position where the measuring point is located. Also, the minimum size of the spot S11 is generally determined by the light source 30.
Therefore, the diameter D of the light spot S11 in the present embodiment is less than or equal to R/2, so as to avoid the oversize of the light spot S11 and reduce the probability that the light spot S11 covers both the crease area and the flat area; also, the diameter D of the light spot S11 is greater than or equal to 0.78mm, as determined by the light source 30.
In an embodiment, considering that the number of the measurement points is multiple, and the device for measuring the flatness of the display panel of the embodiment needs to measure each measurement point one by one, the device for measuring the flatness of the display panel of the embodiment may further include a moving component (not shown), which is connected to the light source 30 and the light receiving component 40, and is configured to drive the light source 30 and the light receiving component 40 to move, so as to measure each measurement point one by one.
Further, the moving component may be connected to the integrating sphere 43, and by driving the integrating sphere 43 to move, the light source 30, the first light receiving element 41, and the second light receiving element 42 on the integrating sphere 43 move, so as to measure each measurement point one by one.
In an embodiment, the target difference value corresponding to the measuring point is a ratio of the light intensity of the second reflected light beam and the light intensity of the first reflected light beam corresponding to the measuring point, so as to reflect the difference between the first reflected light beam and the second reflected light beam of the measuring point, and further reflect the flatness of the measuring point sensitively, so as to improve the sensitivity of measuring the flatness of the display panel 20.
Of course, in other embodiments of the present invention, the target difference value corresponding to the measuring point is not limited to the ratio of the light intensity of the second reflected light beam to the light intensity of the first reflected light beam, and may also be, for example, the ratio of the light intensity of the first reflected light beam to the light intensity of the second reflected light beam, or the difference between the light intensity of the first reflected light beam and the light intensity of the second reflected light beam. The following description will be given by taking the target difference value corresponding to the measurement point as the ratio of the light intensity of the second reflected light beam to the light intensity of the first reflected light beam corresponding to the measurement point as an example, which is only necessary for discussion and not limiting.
Further, with continued reference to fig. 2 and fig. 3, the bending region 21 of the display panel 20 includes a main bending region 211 and a transition region 212. The display panel 20 in the main bending region 211 can be bent with a bending radius R, so that the display panel 20 is in a bent state. The main bending region 211 connects the flat region 22 through the transition region 212, and the transition region 212 may have a certain degree of bending, so that the edge of the transition region 212 adjacent to the flat region 22 is the bending edge of the display panel 20.
The length of the transition region 212 in the first direction is greater than or equal to R/2, wherein the main bending region 211, the transition region 212 and the flat region 22 are sequentially arranged along the first direction (as shown by an arrow X in fig. 2, the same below) when the display panel 20 is flat. In other words, the width of the transition region 212 is greater than or equal to R/2, i.e., the position that is greater than or equal to R/2 from the edge of the main bending region 211 adjacent to the transition region 212 is the bending edge of the display panel 20.
It is considered that the reflected light beams corresponding to the bending region measuring points and the flat region measuring points are different due to factors such as incorrect placement of the display panel 20 (for example, the display panel 20 is not placed horizontally, and has a certain degree of inclination) in the process of measuring the flatness of the display panel 20.
In view of this, the inflection zone measurement points of the present embodiment include a main inflection zone measurement point (e.g., main inflection zone measurement point B2 described below) located at the main inflection zone 211 and a transition zone measurement point (e.g., first transition zone measurement point B1 and second transition zone measurement point B3 described below) located at the transition zone 212.
The difference between the target difference value corresponding to the main bending region measuring point and the target difference value corresponding to the flat region measuring point is the main bending region difference value, the difference between the target difference value corresponding to the transition region measuring point and the target difference value corresponding to the flat region measuring point is the transition region difference value, and the difference between the transition region difference value and the main bending region difference value is used for evaluating the flatness of the display panel 20.
In this way, the present embodiment utilizes the difference between the difference value of the transition region and the difference value of the main bending region to evaluate the flatness of the display panel 20, so as to avoid the influence of factors such as incorrect placement of the display panel 20 on the measurement result, and further improve the accuracy of measuring the flatness of the display panel 20.
Alternatively, considering that the bending edge of the display panel 20 is also subjected to the bending stress, the bending edge of the flattened display panel 20 needs to be measured to measure the flatness of the bending edge, so as to accurately evaluate the flatness of the display panel 20.
In view of this, the transition region measurement point of the present embodiment is preferably located at the edge of the transition region 212 adjacent to the flat region 22, i.e. the transition region measurement point is located at the bending edge of the display panel 20.
In an exemplary embodiment, even if the target difference value corresponding to the bending region measuring point and the target difference value corresponding to the flat region measuring point of different display panels 20 are different by the same magnitude, the flatness represented by the different display panels 20 may be different, and therefore, it is required to uniformly measure the flatness of the different display panels 20, and a uniform flatness measurement standard needs to be formulated.
In view of this, the difference value of the main bending area in this embodiment is a ratio of a difference between a target difference value corresponding to the main bending area measuring point and a target difference value corresponding to the flat area measuring point to a sum of the two, and the ratio is used to describe a difference between the target difference value corresponding to the main bending area measuring point and the target difference value corresponding to the flat area measuring point. The difference value of the transition area is the ratio of the difference between a target difference value corresponding to the measurement point of the transition area and a target difference value corresponding to the measurement point of the flat area to the sum of the target difference value and the target difference value, and the ratio is used for describing the difference between the target difference value corresponding to the measurement point of the transition area and the target difference value corresponding to the measurement point of the flat area.
In this way, in this embodiment, the difference between the target difference value corresponding to the bending area measuring point and the target difference value corresponding to the flat area measuring point is described by using the ratio of the difference between the target difference values of the bending area measuring point (including the main bending area measuring point and the transition area measuring point) and the flat area measuring point and the sum of the target difference values of the bending area measuring point and the flat area measuring point, so as to evaluate the flatness of different display panels 20 by using the uniform flatness measurement standard.
Of course, in other embodiments of the present invention, the difference between the target difference value corresponding to the bending area measuring point and the target difference value corresponding to the flat area measuring point may also be described by using the difference between the target difference values corresponding to the bending area measuring point and the flat area measuring point, which is not limited herein.
Further, referring to fig. 2, the flat region 22 of the display panel 20 includes a first flat region 221 and a second flat region 222, the first flat region 221 and the second flat region 222 are respectively located at two opposite sides of the main bending region 211, the transition region 212 includes a first transition region 213 and a second transition region 214, the main bending region 211 is connected to the first flat region 221 through the first transition region 213, and the main bending region 211 is connected to the second flat region 222 through the second transition region 214.
It is also considered that the difference between the reflected light beam corresponding to the measurement point of the bending region and the reflected light beam corresponding to the measurement point of the flat region may be caused by factors such as incorrect placement of the display panel 20 during the measurement of the flatness of the display panel 20. In order to avoid the influence of factors such as incorrect placement of the display panel 20 on the measurement result, and further improve the accuracy of measuring the flatness of the display panel 20, in the present embodiment, the measurement points are respectively selected in the first flat area 221 and the second flat area 222, and the measurement points are respectively selected in the first transition area 213 and the second transition area 214.
Specifically, the flat zone measurement points include a first flat zone measurement point (e.g., first flat zone measurement point a, described below) located at the first flat zone 221 and a second flat zone measurement point (e.g., second flat zone measurement point C, described below) located at the second flat zone 222. The transition zone measurement points include a first transition zone measurement point (e.g., first transition zone measurement point B1, described below) located at first transition zone 213 and a second transition zone measurement point (e.g., second transition zone measurement point B3, described below) located at second transition zone 214.
The main bending area measuring point and the first flat area measuring point have a first main bending area difference value, the first transition area measuring point and the first flat area measuring point have a first transition area difference value, the main bending area measuring point and the second flat area measuring point have a second main bending area difference value, the second transition area measuring point and the second flat area measuring point have a second transition area difference value, the first transition area difference value and the first main bending area difference value have a first difference value, and the second transition area difference value and the second main bending area difference value have a second difference value.
The first difference describes the difference between the flatness of the inflection region 21 and the flatness of the first flat region 221, and the second difference describes the difference between the flatness of the inflection region 21 and the flatness of the second flat region 222, the greater of the two differences determining the flatness of the display panel 20. Therefore, the larger of the absolute values of the first difference and the second difference in the present embodiment is used to evaluate the flatness of the display panel 20, i.e., the larger of the absolute value of the first difference and the absolute value of the second difference is used to evaluate the flatness of the display panel 20.
Referring to fig. 2, the following describes an exemplary method for evaluating the flatness of the display panel according to the embodiment of the present invention based on the device for measuring the flatness of the display panel described in the above embodiment.
A first flat zone measurement point A is selected in the first flat zone 221, a first transition zone measurement point B1 is selected in the first transition zone 213, a main inflection zone measurement point B2 is selected in the main inflection zone 211, a second transition zone measurement point B3 is selected in the second transition zone 214, and a second flat zone measurement point C is selected in the second flat zone 222.
The measurement points are measured one by one using the apparatus for measuring the flatness of the display panel as set forth in the above embodiments. Wherein, the light intensity of the first reflected light beam corresponding to the first flat area measuring point A is YAThe light intensity of the first reflected light beam corresponding to the first transition region measurement point B1 is YB1The light intensity of the first reflected light beam corresponding to the main bending region measuring point B2 is YB2The light intensity of the first reflected light beam corresponding to the second transition region measurement point B3 is YB3The light intensity of the first reflected light beam corresponding to the second flat region measuring point C is YC(ii) a The light intensity of the second reflected light beam corresponding to the first flat area measuring point A is YA', the light intensity of the second reflected light beam corresponding to the first transition region measuring point B1 is YB1', the light intensity of the second reflected light beam corresponding to the main bending region measuring point B2 is YB2', the light intensity of the second reflected light beam corresponding to the second transition region measuring point B3 is YB3', the light intensity of the second reflected light beam corresponding to the second flat area measuring point C is YC’。
The target difference value corresponding to the first flat zone measurement point is
The target difference value corresponding to the first transition region measuring point is
The target difference value corresponding to the main bending area measuring point is
The target difference value corresponding to the second transition region measuring point is
The target difference value corresponding to the second flat zone measurement point is
The absolute value of the first difference is M, the absolute value of the second difference is N, and the flattening degree of the display panel is JND, then:
M＝(CB1-CA)/(CB1+CA)-(CB2-CA)/(CB2+CA)
N＝(CB3-CC)/(CB3+CC)-(CB2-CC)/(CB2+CC)|
JND＝Max(M,N)/0.004。
it should be noted that the arrow Y in fig. 2 shows a second direction, the second direction is perpendicular to the first direction, and the first direction and the second direction together define a plane in which the display panel 20 is located. As can be seen from fig. 2, the first flat area measuring point a, the first transition area measuring point B1, the main bending area measuring point B2, the second transition area measuring point B3, and the second flat area measuring point C are located at the same position of the display panel 20 in the second direction, so that the measuring points can be respectively selected at different positions of the display panel 20 in the second direction to calculate the flatness of the display panel 20 at different positions in the second direction, and the flatness of the display panel 20 can be comprehensively evaluated to further improve the accuracy of measuring the flatness of the display panel 20.
In summary, the device for measuring the flatness of the display panel provided by the present invention outputs the measuring beam to the measuring point on the display panel by the light source, the measuring beam is reflected by the measuring point to obtain the reflected beam, and the reflected beam is transmitted to the light receiving element. The measuring points comprise bending area measuring points and flat area measuring points, and the difference between the reflected light beams corresponding to the bending area measuring points and the reflected light beams corresponding to the flat area measuring points is used for evaluating the flatness of the display panel, which means that the flatness of the display panel can be quantitatively evaluated, so that the accuracy of measuring the flatness of the display panel can be improved.
In addition, in the present invention, unless otherwise expressly specified or limited, the terms "connected," "stacked," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An apparatus for measuring flatness of a display panel, the display panel being divided into a bending region and a flat region adjacent to each other, the apparatus comprising:
the light source is used for outputting measuring beams to measuring points on the display panel, wherein the measuring points comprise bending area measuring points and flat area measuring points, the bending area measuring points are located in the bending areas, and the flat area measuring points are located in the flat areas;
the measuring light beam is reflected by the measuring point to obtain a reflected light beam, and the reflected light beam is transmitted to the light receiving component;
and the difference between the reflected light beam corresponding to the bending area measuring point and the reflected light beam corresponding to the flat area measuring point is used for evaluating the flattening degree of the display panel.
2. The apparatus of claim 1,
the light receiving assembly includes a first light receiving element and a second light receiving element;
the measuring light beam is subjected to specular reflection through the measuring point to obtain a first reflected light beam, the first reflected light beam is transmitted to the first light receiving element to determine the light intensity of the first reflected light beam, the measuring light beam is subjected to diffuse reflection through the measuring point to obtain a second reflected light beam, the second reflected light beam is transmitted to the second light receiving element to determine the light intensity of the second reflected light beam, and the light intensity of the first reflected light beam and the light intensity of the second reflected light beam have target difference values;
and the difference between the target difference value corresponding to the bending area measuring point and the target difference value corresponding to the flat area measuring point is used for evaluating the flattening degree of the display panel.
3. The apparatus of claim 2,
the light receiving assembly further comprises an integrating sphere;
the light source and the first light receiving element are both arranged on the side wall of the integrating sphere, a measuring window is further formed in the side wall of the integrating sphere, and the measuring window is used for exposing the measuring point after the integrating sphere is in butt joint with the display panel;
the light source and the first light receiving element are symmetrically distributed by taking an axis as a symmetry axis, wherein the axis passes through the center of the measuring window and the spherical center of the integrating sphere;
the second light receiving element is arranged on the side wall of the integrating sphere except the position of the light source and the position of the first light receiving element.
4. The apparatus of claim 2,
the target difference value is a ratio of the light intensity of the second reflected light beam to the light intensity of the first reflected light beam.
5. The apparatus of claim 2,
the bending area comprises a main bending area and a transition area, and the main bending area is connected with the flat area through the transition area;
the bending zone measuring points comprise main bending zone measuring points and transition zone measuring points, the main bending zone measuring points are located in the main bending zone, and the transition zone measuring points are located in the transition zone;
the difference between the target difference value corresponding to the main bending area measuring point and the target difference value corresponding to the flat area measuring point is the main bending area difference value, the difference between the target difference value corresponding to the transition area measuring point and the target difference value corresponding to the flat area measuring point is the transition area difference value, and the difference between the transition area difference value and the main bending area difference value is used for evaluating the flattening degree of the display panel.
6. The apparatus of claim 5,
the difference value of the main bending area is the ratio of the difference between a target difference value corresponding to the main bending area measuring point and a target difference value corresponding to the flat area measuring point to the sum of the target difference value and the flat area measuring point;
the difference value of the transition area is the ratio of the difference between a target difference value corresponding to the measurement point of the transition area and a target difference value corresponding to the measurement point of the flat area to the sum of the target difference value and the target difference value.
7. The apparatus of claim 5,
the flat area comprises a first flat area and a second flat area, the first flat area and the second flat area are respectively positioned at two opposite sides of the main bending area, the transition area comprises a first transition area and a second transition area, the main bending area is connected with the first flat area through the first transition area, and the main bending area is connected with the second flat area through the second transition area;
the flat zone measurement points comprise a first flat zone measurement point and a second flat zone measurement point, the first flat zone measurement point is located in the first flat zone, and the second flat zone measurement point is located in the second flat zone;
the transition region measuring points comprise a first transition region measuring point and a second transition region measuring point, the first transition region measuring point is positioned in the first transition region, and the second transition region measuring point is positioned in the second transition region;
the main bending area measuring point and the first flat area measuring point have a first main bending area difference value, the first transition area measuring point and the first flat area measuring point have a first transition area difference value, the main bending area measuring point and the second flat area measuring point have a second main bending area difference value, the second transition area measuring point and the second flat area measuring point have a second transition area difference value, the first transition area difference value and the first main bending area difference value have a first difference value, the second transition area difference value and the second main bending area difference value have a second difference value, and the larger of the first difference value and the second difference value is used for evaluating the flatness of the display panel.
8. The apparatus of claim 7,
the target difference value corresponding to the first transition region measuring point is CB1The target difference value corresponding to the main bending area measuring point is CB2The target difference value corresponding to the second transition region measuring point is CB3The target difference value corresponding to the first flat area measuring point is CAThe target difference value corresponding to the second flat area measuring point is CCAnd the flatness of the display panel is JND, wherein:
M＝|(CB1-CA)/(CB1+CA)-(CB2-CA)/(CB2+CA)|
N＝|(CB3-CC)/(CB3+CC)-(CB2-CC)/(CB2+CC)|
JND＝Max(M,N)/0.004。
9. the apparatus of claim 5,
the bending radius of the main bending area is R;
the length of the transition area in the first direction is greater than or equal to R/2, wherein when the display panel is flattened, the main bending area, the transition area and the flat area are sequentially arranged along the first direction;
the transition region measurement point is located at an edge of the transition region adjoining the flat region.
10. The apparatus of claim 1,
the bending radius of the bending area is R;
the measuring beam is formed with a light spot at the measuring point, and the diameter of the light spot is greater than or equal to 0.78mm and less than or equal to R/2.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117372422A (en) * | 2023-12-04 | 2024-01-09 | 青岛宜霖赛瑞智能科技有限公司 | Material bending degree detection method for part production |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5764874A (en) * | 1994-10-31 | 1998-06-09 | Northeast Robotics, Inc. | Imaging system utilizing both diffuse and specular reflection characteristics |
| JPH11230912A (en) * | 1998-02-09 | 1999-08-27 | Hokkei Kogyo:Kk | Apparatus and method for detection of surface defect |
| JP2000329539A (en) * | 1999-05-17 | 2000-11-30 | Sony Corp | Apparatus for evaluating reflecting surface, method for evaluating reflecting surface, and production of optical disk |
| JP2007024733A (en) * | 2005-07-19 | 2007-02-01 | Hitachi High-Technologies Corp | Substrate inspection device and substrate inspection method |
| CN102003950A (en) * | 2010-10-26 | 2011-04-06 | 西安昂科光电有限公司 | Device and method for measuring surface flatness of light wave array surface or optical reflecting surface |
| CN102087824A (en) * | 2009-12-04 | 2011-06-08 | 索尼公司 | Display apparatus and control method thereof |
| CN102348961A (en) * | 2009-03-11 | 2012-02-08 | 恩德斯+豪斯流量技术股份有限公司 | Measuring system for media which flow in a tube conduit |
| US20140301745A1 (en) * | 2013-04-05 | 2014-10-09 | Canon Kabushiki Kaisha | Image forming apparatus, image forming method, and medium |
| CN104718427A (en) * | 2012-10-12 | 2015-06-17 | 东丽株式会社 | Detection method, microarray analysis method and fluorescence reading device |
| US20150226637A1 (en) * | 2013-07-31 | 2015-08-13 | Jorge Sanchez | Method and Optical Shield for Detecting Tampering |
| KR20180016767A (en) * | 2016-08-08 | 2018-02-20 | 에스케이실트론 주식회사 | System for measuring flatness of a wafer and method for measuring flatness using the same |
| CN108169156A (en) * | 2017-12-08 | 2018-06-15 | 中国矿业大学 | A kind of three-level bearing calibration of Fourier transform infrared spectroscopy original position diffusing reflection spectrogram |
| CN108573657A (en) * | 2017-03-14 | 2018-09-25 | 昆山工研院新型平板显示技术中心有限公司 | Folding display screen |
| CN109444475A (en) * | 2019-01-18 | 2019-03-08 | 兰州理工大学 | The research method that frictional force is contributed in a kind of probe thin slice and each contact zone of substrate |
| CN110542392A (en) * | 2019-09-06 | 2019-12-06 | 深圳中科飞测科技有限公司 | Detection equipment and detection method |
| CN110823137A (en) * | 2018-08-07 | 2020-02-21 | 金宝电子印第安纳公司 | Interferometry waviness detecting system |
| CN111735392A (en) * | 2020-06-28 | 2020-10-02 | 合肥维信诺科技有限公司 | Flexible display panel and flattening degree test method thereof |
| CN112378351A (en) * | 2020-12-03 | 2021-02-19 | 秦皇岛先河科技发展有限公司 | Toughened glass flatness online detection system and detection method thereof |
| CN112630049A (en) * | 2020-11-30 | 2021-04-09 | 广州国显科技有限公司 | Bending test fixture and bending test method for flexible display panel |
| CN112734756A (en) * | 2021-03-29 | 2021-04-30 | 惠州高视科技有限公司 | Detection method and system based on photometric stereo vision |
-
2021
- 2021-10-18 CN CN202111212073.3A patent/CN114136243A/en active Pending
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5764874A (en) * | 1994-10-31 | 1998-06-09 | Northeast Robotics, Inc. | Imaging system utilizing both diffuse and specular reflection characteristics |
| JPH11230912A (en) * | 1998-02-09 | 1999-08-27 | Hokkei Kogyo:Kk | Apparatus and method for detection of surface defect |
| JP2000329539A (en) * | 1999-05-17 | 2000-11-30 | Sony Corp | Apparatus for evaluating reflecting surface, method for evaluating reflecting surface, and production of optical disk |
| JP2007024733A (en) * | 2005-07-19 | 2007-02-01 | Hitachi High-Technologies Corp | Substrate inspection device and substrate inspection method |
| CN102348961A (en) * | 2009-03-11 | 2012-02-08 | 恩德斯+豪斯流量技术股份有限公司 | Measuring system for media which flow in a tube conduit |
| CN102087824A (en) * | 2009-12-04 | 2011-06-08 | 索尼公司 | Display apparatus and control method thereof |
| CN102003950A (en) * | 2010-10-26 | 2011-04-06 | 西安昂科光电有限公司 | Device and method for measuring surface flatness of light wave array surface or optical reflecting surface |
| CN104718427A (en) * | 2012-10-12 | 2015-06-17 | 东丽株式会社 | Detection method, microarray analysis method and fluorescence reading device |
| US20140301745A1 (en) * | 2013-04-05 | 2014-10-09 | Canon Kabushiki Kaisha | Image forming apparatus, image forming method, and medium |
| US20150226637A1 (en) * | 2013-07-31 | 2015-08-13 | Jorge Sanchez | Method and Optical Shield for Detecting Tampering |
| KR20180016767A (en) * | 2016-08-08 | 2018-02-20 | 에스케이실트론 주식회사 | System for measuring flatness of a wafer and method for measuring flatness using the same |
| CN108573657A (en) * | 2017-03-14 | 2018-09-25 | 昆山工研院新型平板显示技术中心有限公司 | Folding display screen |
| CN108169156A (en) * | 2017-12-08 | 2018-06-15 | 中国矿业大学 | A kind of three-level bearing calibration of Fourier transform infrared spectroscopy original position diffusing reflection spectrogram |
| CN110823137A (en) * | 2018-08-07 | 2020-02-21 | 金宝电子印第安纳公司 | Interferometry waviness detecting system |
| CN109444475A (en) * | 2019-01-18 | 2019-03-08 | 兰州理工大学 | The research method that frictional force is contributed in a kind of probe thin slice and each contact zone of substrate |
| CN110542392A (en) * | 2019-09-06 | 2019-12-06 | 深圳中科飞测科技有限公司 | Detection equipment and detection method |
| CN111735392A (en) * | 2020-06-28 | 2020-10-02 | 合肥维信诺科技有限公司 | Flexible display panel and flattening degree test method thereof |
| CN112630049A (en) * | 2020-11-30 | 2021-04-09 | 广州国显科技有限公司 | Bending test fixture and bending test method for flexible display panel |
| CN112378351A (en) * | 2020-12-03 | 2021-02-19 | 秦皇岛先河科技发展有限公司 | Toughened glass flatness online detection system and detection method thereof |
| CN112734756A (en) * | 2021-03-29 | 2021-04-30 | 惠州高视科技有限公司 | Detection method and system based on photometric stereo vision |
Non-Patent Citations (2)
| Title |
|---|
| 张玉虎 等: "TFT光刻DICD均一性改善优化", 《液晶与显示》, vol. 31, no. 10, 15 October 2016 (2016-10-15), pages 929 - 935 * |
| 蔡定国 等: "180°层状压电介质中的剪切波", 《湖北师范学院学报(自然科学版)》, vol. 13, no. 03, 30 June 1993 (1993-06-30), pages 1 - 7 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117372422A (en) * | 2023-12-04 | 2024-01-09 | 青岛宜霖赛瑞智能科技有限公司 | Material bending degree detection method for part production |
| CN117372422B (en) * | 2023-12-04 | 2024-02-13 | 青岛宜霖赛瑞智能科技有限公司 | Material bending degree detection method for part production |
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